Patent ID: 8682217

Claim:
An image forming apparatus comprising a main body and a conveyance unit, the main body including: an image carrier having one or a plurality of mutually parallel shafts, and forming a toner image on a surface; a roller locating portion formed on both axial ends of the image carrier; a guide locating portion formed in proximity to the roller locating portion, the conveyance unit mounted to open and close on the main body, and including: a transfer roller unit having a transfer roller abutting with the image carrier and forming a transfer nip portion with the image carrier, and a separation lever configured to provide pivotal support for the transfer roller and being disposed to rotate; a conveyance guide configured to guide a sheet of paper to the transfer nip portion, the conveyance guide including a regulating portion and being disposed to rotate; and a biasing member configured to bias the conveyance guide toward the guide locating portion, wherein when the conveyance unit is changing from an open state to a closed state, the separation lever in the transfer roller unit rotates and moves to face the roller locating portion in a state of abutment with the conveyance guide; the conveyance guide rotates and moves in a state in which displacement towards the guide locating unit due to a biasing force of the biasing member is regulated by the separation lever; and when the conveyance unit changes to the closed state, the separation lever separates from the conveyance guide and engages with the roller locating portion; and the conveyance guide abuts with the guide locating portion due to the biasing force from the biasing member.