To prevent a softening agent from transferring from a transmission rotating body to a first carrier rotating body by making hardness of the transmission rotating body for transmitting driving force from a first carrier rotating body to a second carrier rotating body higher than that of the first carrier rotating body or making the hardness of the transmission rotating body the same as that of the first carrier rotating body.
A paper discharging roller 34 is constituted of carrier members 38 for carrying sheets and a driving force transmitted part 37 on which a driving force transmitting part 39 of a transmission roller 35 is abutted, the driving force transmitted part 37 is formed of elastomer of hardness 60° and this part 37 is arranged between the carrier members 38 of the paper discharging roller 34. Further, both of the driving force transmitted part 37 of the paper discharging roller 34 and the driving force transmitted part 39 of the transmission roller 35 are constituted of members with high coefficient of friction. As a result, even if hardness of the driving force transmitting part 39 of the transmission roller 35 is higher than that of the driving force transmitted part 37 of the paper discharging roller 34 which is abutted on this part 39, high transmission efficiency can be obtained. Further, the carrier members 38 and the driving force transmitted part 37 are formed by the same member with high coefficient of friction.
YANAGI HARUYUKI
TANAKA HIROYUKI
