To provide a driving force transmission for reverse input cutout in a simple structure facilitating cut-out of reverse input while idly rotating an output gear in the case that reverse input larger than a certain value is applied so that stuck paper is removed without trouble.
In the driving force transmission for reverse input cutout provided with a driving force transmission part 20 having a reverse input cutout function provided between an input rotation part 10 and the output gear 42, the input rotation part 10 is structured by a worm gear mechanism consisting of a worm gear 21 as an input gear and a worm wheel 22 meshing with this and the driving force transmission part 20 consists of a pair of intermediate shaft bevel gears 18 rotatably fit with an intermediate shaft 14, fixed shaft bevel gears 28, 28' rotatably fit with a fixed shaft 12 and meshed with the respective intermediate shaft bevel gears 18 and a torque limiter 31 provided for a fixed shaft bevel gear 28. The worm wheel 22 is integrally rotatably combined with the intermediate shaft 14 and the output gear 42 is integrally provided with another fixed shaft bevel gear 28'.
Torii Kazuhisa
Takayoshi Tagawa
Higashio Masahiro