| 摘要 |
PROBLEM TO BE SOLVED: To smoothly shake a shaking table by a simple structure. SOLUTION: An annular moving-side magnet 20 having a plurality of different magnetic poles arranged at the same distances is fixed around the peripheries of bearings 7, 8 installed beneath the shaking table 9 fitted into an eccentric shaft part 2. An annular fixed-side magnet 21 which has an inner periphery with such a size as not to contact the outer periphery of the moving-side magnet 20 when the moving-side magnet is rotating and which has magnetic poles in the same number with that of the moving-side magnet, the magnetic poles being arranged at the same distances and so that different magnetic poles are facing each other, is fixed to a frame 6 installed at the outside of the moving magnet 20.
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