| 摘要 |
<p>PURPOSE:To repair easily various members disposed near fulcrums by providing plural pieces of control means to control the opening angle of an upper body and constituting at least one control means among these control means in such a manner that the control can be released. CONSTITUTION:The operator unlocks first an upper machine body cover 2 and a lower machine body cover 1 and divides and opens the cover 2 in the forward opening direction in the case of making a jam disposition or mainte nance operation. The control piece 21 side end of a lower hinge member 20 is then energized upward with elastic force by means of torsion springs 7, 8 via a hinge mechanism 3 and is turned to the position where said end engages with an engaging pin 13a. As a result, the opening angle of the cover 2 is con trolled to, for example, about 45 deg. angle of inclination, by which the jam disposi tion and maintenance operation is made possible without the possibility of contacting with the control plate and driving unit.</p> |
