Patent ID: 7133631

Claim:
A transfer device comprising: a pair of transfer frames; a belt member; a pair of transfer roller levers, which are respectively arranged on inner sides of the transfer frames pivotably; a transfer roller, which is provided between first ends of the transfer roller levers rotatably; a pair of first urging members, which are respectively provided on second ends of the transfer roller levers to energize the transfer roller toward the belt member; a pair of transfer pressure controlling members, which are respectively provided on the transfer frames movably to control urging power of the first urging members; a pair of support roller levers, which are respectively provided on the transfer frames pivotably; a support roller, which is provided between first ends of the support roller levers, and arranged on an upstream of the transfer roller in a transporting direction of the belt member; a pair of second urging members, which are respectively provided on the second ends of the support roller levers to energize the support roller levers in a direction in which the support roller separates from the belt member; and a pair of cam members, which are respectively provided on the transfer frames rotatably, wherein the cam members rotate at three positions; wherein the support roller levers are energized toward the belt member in a first position of the cam members; wherein the support roller levers are energized toward the transfer roller levers so that both the transfer roller and the support roller are separated from the belt member in a second position of the cam members; and wherein the transfer roller levers are fitted to the transfer frames so that both the transfer roller and the support roller are further separated from the belt member in a third position of the cam members.