| 摘要 |
<p>A hoist (1) that is provided with a regenerative resistor (11) and contains the following in a casing (2, 3, and 20): a load-raising/lowering motor (7) driven by an inverter control device (12) and provided with a forced-cooling means (19); and a mechanism part (9) containing a reduction mechanism part (8) and a load sheave (10) that uses power from said reduction mechanism part (8) to take up and let out a chain. The load- raising/lowering motor (7), mechanism part (9), inverter control device (12), and regenerative resistor (11) are distributed inside the casing (2, 3, and 20) so as to achieve a balance of weight about the center of gravity (O) of the load applied when raising or lowering. Also, the inverter control device (12) and the regenerative resistor (11) are affixed to the casing (2, 3, and 20), in close contact therewith, in parts of the casing separated from each other with the mechanism part (9) therebetween. The layout of the inverter control device (12), motor (7), regenerative resistor (11) and the like is thus taken into consideration while making it possible to suitably dissipate heat using the forced-cooling means (19), thereby providing a hoist (1) capable of frequent operation.</p> |
