Abstract
There exist handicapped who need help with transfer from sitting posture to sitting posture. They want to transfer without helper, when one feels like doing. Many of transfer assist tools are not the equipment that help self transfer of handicapped, but the equipment for the reduction of helper's load. In previous works, we have proposed a self transfer assist robot that the handicapped can transfer to a desired position without helper. In order to increase usefulness of the robot, in this investigation, we develop a mechanism for mobile function of the robot, which is compact and powerful.