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    • 44. 发明专利
    • ROTARY DRIVE BED
    • JPH01153244A
    • 1989-06-15
    • JP31058887
    • 1987-12-08
    • NISSAN MOTOR
    • KOZAI MASAFUMISAITO YASUYUKI
    • B23Q1/00B23Q1/52B23Q5/28B23Q16/02B65G67/50
    • PURPOSE:To reduce a table height for improving stability and operability and maintaining silence by arranging circumferentially the secondary side of a linear motor on the back of a table to form a predetermined air gap between said secondary side and the primary side of the linear motor. CONSTITUTION:A jaw 6 is opened and closed by a hydraulic cylinder 7 of a clamp device 4 on a table 3 to clamp a workpiece 8. Then, a thrust is generated by a coil body 9a and action plate 9b of a linear motor 9 to start rotatably the table 3, give a fixed thrust and then brake the table by a reverse thrust of linear motor 9. A pin 11 of a locating unit 10 engages a recess of a recessed bracket 12 to perform a predetermined operation after the completion of locating the workpiece 8. Then, since the table 3 is started and braked by the linear motor 9, the silence can be ensured. Also, since functional parts are few, the table 3 height can be reduced to improve the supporting stability of workpiece 8, facilitate the operation and improve the efficiency of operation.