| 摘要 |
<P>PROBLEM TO BE SOLVED: To perform rotation and return motion of a heavy movable body without applying heavy loads to a rotary part. <P>SOLUTION: The torque of a motor 101 is transmitted via a fan-shaped gear 151 disposed at an end on the rotation center side of an upper movable body 100. The upper movable body 100 includes a ring-shaped end 162 penetrated by a circular hole 163 at the end on the rotation center side, and is supported in such a state that the center of the circular hole 163 is the center of rotation by columnar bosses 171a and 172a with diameters engaged with the circular hole 163 in the ring-shaped end 162. The upper movable body 100 is rotatably supported to a base 23 of a rear unit 22 in such a way that the front surface and rear surface of the ring-shaped end 162 are held between a front plate 171 and a rear plate 172. <P>COPYRIGHT: (C)2012,JPO&INPIT |
