| 摘要 |
<p>PROBLEM TO BE SOLVED: To simplify a structure of a race member and reduce its arrange space.SOLUTION: A pair of ball housing unit 19 are formed so that they become symmetric about a point around a rotation axis R of a rotary tub 9, and a hoop direction length L of each ball housing unit 19 is set to about a half of a length which can hold all multiple balls 17. A control unit 25 executes a normal rotation process rotating the ball 17 more than a semicircle in one direction relative to a race member 15 by repeating acceleration and slowdown of the rotation of the rotary tub 9 as far as a maximum speed is within a primary resonance point by a control of a rotational motor 23, and a reversion process rotating the ball 17 more than the semicircle in another direction relative to the race member 15 by repeating acceleration and slowdown of the rotation of the rotary tub 9 as far as the maximum speed is within the primary resonance point by the control of the rotational motor 23 before dewatering.</p> |
