| 摘要 |
PURPOSE:To make a nonconveyance body conveyable in a specified direction with a standing wave utilized, by installing a noncontact part having a specific wavelength and a contact part with the nonconveyance body both in a sonic propagation body, in case of transferring a conveyed body after getting supersonic waves radiatively propagated to the sonic propagation body. CONSTITUTION:A bolt-clamped piezo-vibrator 6 is attached to one end of a long sonic propagation body 5A, and this vibrator is excited by a high frequency power source 7. With this excitation, a standing wave by longitudinal vibration is produced in the sonic propagation body 5A. In this case, driving force shown in an arrow turns to such a motion concentrated on a nodal point P of each vibration and thereby a direction of the driving force is reversed every lambda/4. Therefore, in order to make unnecessary directional driving force untransmitted to a conveyed body 8, a noncontact part 10 of lambda/4 in length and a contact part of lambda/4 in length, which makes contact with the conveyed body 8 (more than lambda/4 in overall length) are alternately installed on a driving force transmission surface of the sonic propagation body 5A. With this constitution, the conveyed body 8 is conveyed in a specified direction. |
