| 摘要 |
PROBLEM TO BE SOLVED: To provide a vibrating selector in which vibration of a screen is smooth regardless of installation error or wearing/deformation of a member and a change/adjustment of a tilt angle of the screen is easy. SOLUTION: The oscillating selector has a frame, a driving shaft provided at the frame with freely rotating, a screen, an oscillating shaft provided at the screen and a rotation transmission means for revoluting and rotating the oscillating shaft. Further the rotation transmission means is a constant velocity transmission mechanism in which a cycle of the revolution and a cycle of rotation are equal.
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