| 摘要 |
<p>PURPOSE:To oscillate idlers effectively around the stretching direction of a belt by supporting the plural idlers freely oscillatably by way of oscillating arms which respectively assume roughly an L shape. CONSTITUTION:A pair of pulleys 93, 282 which are disposed in roughly a parallel state with each other and are constituted freely movably relatively in an axial center direction are provided and a belt 221 is stretched between a pair of these pulleys by way of plural idlers 223, 224, 228, 229. These plural idlers are supported respectively freely oscillatably in such a manner that along with the relative movement of a pair of the pulleys 93, 282 the plural idlers 223, 224, 228, 229 are respectively oscillated by oscillating arms 225, 226, 230, 231 around the fulcra 232-235 provided to the extension line in the stretching direction of the belt 221 for these.</p> |
