| 摘要 |
<p>A counterweight (5) includes a rotary motor (10) and an inverter (111) provided under the rotary motor (10). Since the rotary motor (10) is smaller than the linear motor, the provision of the rotary motor (10) on the counterweight (5) increases the degree of freedom of the arrangement of the inverter (111) on the counterweight (5). The rotary motor (10) likely to be hot is arranged above the inverter (111) to protect the inverter (111) from the heat of the rotary motor (10).</p> |
