To provide a wheelchair lifting and lowering mechanism capable of raising and lowering a wheelchair main body with respect to a floor surface and the ground, and a wheelchair lifting mechanism including the wheelchair lifting mechanism so that the backrest part can be inclined backward with respect to the seating surface, It is an object of the present invention to provide a wheelchair that can be folded at the center portion.A wheelchair lifting mechanism mounted on a wheelchair that enables a wheelchair to move upwardly and downwardly with respect to a floor surface, wherein the wheelchair lifting and lowering mechanism includes four wheelchair lifting and lowering mechanisms each provided in the vicinity of right and left front and rear ends of a seat surface portion of a wheelchair A lifting and lowering mechanism, a driving part for generating a turning force, and a turning power transmitting part for transmitting the turning force of the driving part to the four raising and lowering mechanisms, wherein the raising and lowering mechanism rotates An inner teeth screwed with the threaded rod body and disposed coaxially with the threaded rod body and restricted in the vertical direction and a gear of the turning force transmission section A wheelchair lifting and lowering mechanism provided with a helical gear driving gear having external teeth to be screwed with the wheelchair, and a wheelchair having a backrest inclining means.(FIG.【課題】車椅子本体を床面や地面に対して昇降できる車椅子昇降機構、及び、前記車椅子昇降機構を備えて背凭れ部が着座面に対して後方に傾斜可能で、不使用時には車椅子本体を左右中央部で折り畳み可能な車椅子を提供することを課題とする。【解決手段】車椅子を床面に対して昇降可能とする、車椅子に装着される車椅子昇降機構であって、車椅子昇降機構が、車椅子の座面部の左右前後端近傍それぞれに垂設される4か所の昇降機構と、回動力を生じさせる1か所の駆動部と、駆動部の回動力を前記4か所の昇降機構に伝動する回動力伝動部と、を備え、昇降機構は、回動しながら上下方向に自在に移動可能な螺棒体と、螺棒体と同軸上に配設されかつ上下方向移動を規制された、螺棒体と螺合する内歯と回動力伝動部の歯車と螺合する外歯を有する螺棒体駆動用歯車とを備えた車椅子昇降機構、及び、背凭れ部傾斜手段を備えた車椅子により課題解決できた。【選択図】 図16
