PROBLEM TO BE SOLVED: To provide a winch device that can eliminate looseness of a traction member in a simple structure, and to provide an assist apparatus for getting on and off a wheelchair, the apparatus including the winch device.SOLUTION: The winch device 1 includes: the traction member 2 a drum 3 that can wind and unwind the traction member 2 a motor 4 that can rotate the drum 3 a ratchet mechanism 5 that is provided between the drum 3 and the motor 4, connects the drum 3 to the motor 4, and is made to be engaged when the drum 3 is rotated in an unwinding direction D2 of the traction member 2 and to be disengaged when the drum 3 is rotated in a winding direction D1 of the traction member 2 and a rotary force biasing means 6 that biases the drum 3 in the winding direction D1 of the traction member 2.COPYRIGHT: (C)2012,JPO&INPIT【課題】簡単な構成で牽引部材の弛みを解消できるウインチ装置およびそれを備えた車椅子乗降補助装置を提供する。【解決手段】ウインチ装置1は、牽引部材2と、牽引部材2を巻取りおよび繰出し可能なドラム3と、ドラム3を回転可能なモータ4と、ドラム3とモータ4との間に設けられ、ドラム3とモータ4とを接続し、牽引部材2の繰出し方向D2にドラム3が回転する際には係合状態となり、牽引部材2の巻取り方向D1にドラム3が回転する際には係合状態が解除可能となるラチェット機構5と、ドラム3を牽引部材2の巻取り方向D1に付勢する回転力付勢手段6とを備えている。【選択図】図2
