To improve feeding accuracy, by reducing a backlash quantity of a sprocket, in a unidirectional intermittent feeding unit locked when a torque limiter idly rotates and rocks in the inverse direction of the above rotation, when a rocking member rocks in the feeding direction, by engaging a feeding claw installed in the rocking member coaxial with a ratchet with the ratchet, by installing the one-way clutch type torque limiter in the sprocket having the ratchet.
Among pockets 6 arranged at a predetermined interval on an inner diameter surface of an external member constituting the torque limiter 11, an interval between the specific adjacent two pockets 6 is set large, and a radial receiving part 17 is arranged in its interval part. Sum total radial component force PO by an energizing spring 9 acting on a rolling body 8 stored in the respective pockets 6, is made to act on the radial receiving part 17.
COPYRIGHT: (C)2008,JPO&INPIT
Torii Kazuhisa
Takayoshi Tagawa
Higashio Masahiro
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