Separation and Transportation of Works Using Elliptical Vibration (The Case of Vertical Vibration under the Jump Limit)

This paper describes the simultaneous separation and transportation of works with various coefficients of friction by using elliptical vibration. In transportation by elliptical vibration, works move right or left, or stop, depending on the phase difference between horizontal and vertical vibration. As transportation characteristics are changed by the coefficients of friction, works with various coefficients of friction can be simultaneously separated and transported by adequately controlling the phase difference. Experimental results show that the works of same shapes and sizes can be separated according to the material of those, and plain washers and electronic parts also can be separated according to the different shape of face and reverse side. We also examined optimal driving condition for separation. Speed of separation and transportation was fastest on condition that vertical amplitude was the jump limit. The dispersions of transportation characteristics were reduced on condition that horizontal amplitude was large.