| 摘要 |
PURPOSE:To make the constitution simple in a manner and small in size as well as to facilitate easy maintenance and adjustment thereof by meshing a ring gear rotating together with a turn-table with a spur gear, and by stopping a motor at every one turn of the spur gear so as to detect thereby the rotating angle of a rotating shaft. CONSTITUTION:A turn-table 1 is rotated by a motor 6 via No.1 spur gear 5 and a ring gear 4. Simultaneously No.2 spur gear 8 is rotated at a predetermined gear ratio with the ring gear 4. Then a dock section 10 is rotated while being synchronized with the spur gear 8, thereby actuating a limit switch 11. Therefore, after the motor 6 is stopped at every one turn of the spur gear 8, it is restarted. And the rotating angle of a rotating shaft 7 at the time of motor stop is detected by a rotary switch 12. In this constitution, the replacement with the other spur gear having the different number of gear teeth enables a stop point to be changed with the reduction of parts in number, thereby enabling a small size thereof to be employed with the reduction in weight as well as facilitating each maintenance and adjustment thereof.
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