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This paper deals with the pair resonator generates an elliptic vibration for colony type feeder. The resonator consists of loop and leg part and vibrates respectively. Each part was actuated by bimorph type piezoelectric member. The resonator can generate elliptic motion at the center point of the upper member by the deflection of loop part and the bending of leg part. If the resonators that be put in a train are actuated at the same frequency, the colony type feeder, consits of the resonators, can feed objects on the upper surface of its train. The resonator needs rigid fixation on the bottom end for generating an elliptic vibration. However, there is no space to place the mechanism for fixing rigidity, because the feeder needs a narrow gap between each resonators. Therefore, we developed the pair resonator, stucked two resonators of each other on the bottom end. Since the pair resonators, be put in order, vibrate like a tuning fork without rigid fixation, the feeder can generate arbitrary elliptic vibration on all feeding surface without a long gap to each others. The trial one of the feeder can change locus of elliptic vibration with changing input phase.

An Absorption of Coupled Vibration for The Colony Type Feeder with Pair Resonator