| 摘要 |
PROBLEM TO BE SOLVED: To enlarge a range where vibrating force can be increased and decreased. SOLUTION: The first gear pulley 16 for rotating the first rotating shaft on which the first eccentric weight is fixed and the second gear pulley 17 for rotating the second rotating shaft on which the second eccentric weight is fixed are provided on the same plane and the third rotating shaft and the fourth rotating shaft are similarly provided respectively just below both rotating shafts and an endless timing belt 37 is hung on a driving gear pulley 33 and a gear pulley 36 provided on a horizontally displacable sliding base 31 from the underside of the first gear pulley 16 through the top side of the second gear pulley and furthermore from the top side of the fourth gear pulley 19 to the underside of the third gear pulley 18 and the sliding base can be moved in the horizontal direction to the timing belt 37. |
