| 摘要 |
PURPOSE:To provide the titled apparatus capable of securing a large degree of freedom even with respect to the straight motion of type, constituted in such a mechanism that the interval of an upwardly and downwardly movable passive pulley fixed to a type body and a drive pulley is made wide to minimize a backlacsh error. CONSTITUTION:A passive pulley 6 fixed to a type body 1 having fingers with flexibility actually respectively mounted with two upper and lower types arragned at equal intervals in the circumferential direction thereof is made movable upwardly and downwardly. In addition, the interval of a drive pulley 4 fixed to a rotary motor 3 and the passive pulley 6 is made wide to suppress a backlash error to the min. while the inclination of a belt 5 is prevented from being made large even if the type body is subjected to straight motion in an upward and downward direction. When a solenoid 10 is excited, a shaft 7 is pushed up against the force of a spring 13 by an arm 12 to carry out printing by the type of an underlayer. |
