| 摘要 |
<p>PURPOSE:To accomplish high-speed movement in an up-and-down direction by arranging two crank gears through a reduction gear mechanism spaced at a distance which is the integer multiple of the single pitch of an elevator step. CONSTITUTION:A motor 22 is separately provided for driving the clamp action of a pinch roller and the elevator step 12 for elevating action is driven by two crank gears 15 and 16 arranged up and down so as to accomplish the elevating action of twofold stroke of the elevator step 12 having the same umber of steps. Two pairs of crank pins 28 are attached to the gears 15 and 16 at 180 deg. and perform the elevating action of two steps by rotating once. Thus, the elevating action is performed at a higher speed.</p> |
