| 摘要 |
<p>PURPOSE:To make a complicated drive part unnecessary and to facilitate the moving and positioning of a loading member by providing a projection delayed by a half pitch and a drive part having a coil so that they confront with plural projections installed on the outer periphery of the loading member. CONSTITUTION:Plural supporting rollers 11 support the circular band-like loading member 9 by tilting with respect to a chassis 2. Suction yokes 22 and 23, magnets 34 and 35 and exciting coils 36 and 37 comprise a drive part 21, and projections 30-33 on the suction surface and the plural projections on the member 9 are located so that they can be confronted and driven reversely. According to a loading command fluxes are concentrated on the projection 10 and the confronted suction surfaces among four suction surfaces, ad move counterclockwise by quater the pitch. Accordingly a drive means such as a speed reducing machine is made unnecessary, whereby a simple structure can move the loading mechanism and its positioning can be facilitated.</p> |
