| 摘要 |
<p>A rotary cylinder for controlling operations of a chuck to be used on a lathe or the like. The rotary cylinder 1 comprises a housing 11, a cylinder unit 2, a distributor 9 supporting the cylinder unit in bearings 8 fitted therein, and a seizure detecting system 12 including a detaining mechanism 23, 9b for restraining the distributor 9 from rotation relative to the housing 11. The seizure detecting system 12 detects seizure between the distributor 9 and the cylinder unit 2 and allows the distributor to rotate relative to the housing. The distributor is capable of being fixedly held on the housing without distorting the bearings 8 supporting the cylinder unit and of being disconnected from the housing when seizure occurs between the distributor and the cylinder unit. <IMAGE></p> |
