PURPOSE: To enable a cartridge to be held stably and formally for a long period of time by holding the cartridge in such a way that the front surface of a cartridge hand mechanism between closing hands is allowed to be of an elastic surface so as to permit the rear surface of the cartridge to come in contact with the above said elastic surface with pressure.
CONSTITUTION: When a cartridge 66 comes at its forward end, an elastic part surface 84 on the side of a hand mechanism 76 is allowed to come in contact with the rear end surface of the cartridge FC somewhat with pressure. Then, hands 77 and 78 are actuated to be closed, tapered pawls 77b and 78b which are projected inward in a cross-sectional form of a wedge of a left and a right hands 77 and 78, wink into obliquely sunk concaves Ca and Ca at the pawls of the cartridge C allowing the cartridge C to be held between the hands 77 and 78. At this moment, the component of a force due to the above said oblique engagement allows the cartridge C to move to the elastic part (84) side while it is retracted permitting the rear end surface of the cartridge C to come in contact with the surface of the part 84 with pressure while the cartridge C allows the part to sink. This configuration enables the cartridge to be held by the above mentioned three parts allowing a grip force to be stable and be effected accurately and also enabling the grip force of hands 77 and 78 to be small.
YUKIMURA NOBORU
SUGITA SHIGERU
SATO MASA
