| 摘要 |
<p>PURPOSE:To improve the certainly of operation against a change in the lapse of time and an environ-change by operating a mechanism perfectly on a gear drive basis. CONSTITUTION:There are three kinds of ring, i.e. driving ring 32, cam ring 38, and loading ring 10; and the cam ring 38 is fitted to the top surface of a chassis 1 at the highest height and the driving ring 32 is fitted above it in parallel, but the loading ring 10 is fitted above the driving ring 32 slantingly to the chassis 1. The driving ring 32 and cam ring 38 are held at their outer peripheral parts by ring holders 33-a and 33-b-35-a and 35-b of two-stage structure pivoted turnably on the side part of the chassis 1. The loading ring 10, on the other hand, is held at its inner peripheral part by an L-ring holder 17 and L-ring holders 18 and 19. Those three kinds of rings are driven by a loading mode motor.</p> |
