| 摘要 |
<p>PURPOSE:To control rotational speed and a stopping position correctly so as to prevent generation of electric wave noise by installing a hydraulic speed regulating brake on the output shaft of an air motor driving device, and composing the hydraulic speed regulating brake of a hydraulic pump, an oil pressure circuit, and a throttle valve. CONSTITUTION:An air motor 1 in a dark room 2 is connected to a compressed air source 3 provided outside the dark room 2 while interposing an air pressure controlling device 4 and a direction switching valve 5. A hydraulic pump 11 is rotated by the output shaft 6 of the air motor 1 through a gear. An oil pressure circuit 14 having four check valves 12 and one throttle valve 13 is attached to the hydraulic pump 11. In a turn table driving device, compressed air inputting direction is switched by a direction switching valve 5 so as to switch rotating directions of the air motor 1 and a turn table 8. Also the rotating direction of the hydraulic pump 11 is switched simultaneously, but the oil pressure circuit 14 is provided in such constitution that oil pressure is circulated passing the throttle valve 13 in both normal and reverse directions so as to exhibit function of a speed regulating brake.</p> |
