| 摘要 |
<p>To a braking device for an elevator of which the brake is released by braking a brake wheel (1) of an elevator by advancing brake shoes (5) by means of brake springs (6) and retracting brake shoes (5) by attracting movable iron cores (10) with electromagnets (11), additional elastic bodies (14) which resist the attraction force with a reaction force of an increase ratio larger than the increase ratio of the electromagnets (11) according to the decrease in the gap are fixed. When the brake is to be released, the electromagnets (11) gradually attract the movable iron cores (10) according to the progressive increase in the exciting current and keeping in equilibrium with the energized additional elastic bodies (14) on the way, so the collision noise caused by attachment can be reduced. Furthermore, when the brake is to be applied, the movable iron cores (10) gradually advance in accordance with the progressive decrease in the exciting current, so the collision noise caused when the brake shoes (5) abut the brake wheel (1) can be reduced. <IMAGE></p> |
