| 摘要 |
Sand is placed in a circular tray 1 which is rotatable about inclined axis 2 by motor 5 through gears 4 and 6. Rollers 13 run on a circular track on the base of the tray 1 and transmit vibrations from a vibrator 15 fixed to a support 12 which carries the rollers 13. The support 12 is mounted on two frame members 9 by four resilient cushions 11. For adjustment of the position of the rollers 13 to compensate manufacturing tolerances the cushions 11 are pivotably connected with the support 12 and their lower ends are eccentrically connected with rotatable pins. The pins are threaded and adjustable in height relative to the frame 9 by means of nuts in order to vary the pressure of the rollers 13 against the tray. <IMAGE> |
