Patent ID: 8090296

Claim:
An image forming apparatus that drives a process portion for performing image formation by an electrophotographic method, comprising: a plurality of coupling members for transmitting driving force to each of a plurality of driving shafts that drive the process portion; a plurality of coupling attaching/detaching members for attaching/detaching the plurality of coupling members; and a coupling attaching/detaching member driving mechanism for operating the plurality of coupling attaching/detaching members in association with each other, wherein the coupling member is configured by a driving coupling and a driven coupling, and the plurality of coupling attaching/detaching members are provided so as to be movable independently; wherein: the coupling attaching/detaching member has a function of performing attachment/detachment operations of the plurality of coupling members simultaneously; and the process portion includes a plurality of photoreceptor drums having toner images formed thereon and a plurality of cleaning apparatuses for removing toner remaining on the photoreceptor drums, the cleaning apparatuses include waste toner transporting screws for transporting collected waste toner, and includes, as the plurality of driving shafts, driving shafts of the plurality of the photoreceptor drums and driving shafts of the plurality of waste toner transporting screws, and among the plurality of coupling attaching/detaching members, the first coupling attaching/detaching member attaches/detaches coupling members of the driving shafts of the plurality of photoreceptor drums and coupling members of the driving shafts of the plurality of waste toner transporting screws.