| 摘要 |
<p>PROBLEM TO BE SOLVED: To quickly easily replace a bearing even in a small space. SOLUTION: A turntable 11 has a through hole 11h through which a bearing 12 can be loaded and unloaded and is mounted on the bearing 12 via a joint ring 15. When a bearing 12 is worn, a plurality of spacers are inserted between the turntable 11 and the housing 14 and then the turntable 11 is separated from the joint ring 15 and the bearing 12 is separated from the housing 14 and the worn bearing 12 is pulled up and removed through the through hole 11h of the turntable 11 without lifting the turntable 11 weighed by an antenna unit carried thereon. Next, a new bearing is lowered on the housing 14 through the through hole 11h of the turntable 11 and is fixed thereto.</p> |
