PROBLEM TO BE SOLVED: To perform assistance to enable a seated person to stand up by allowing a seat surface to be nearly horizontally elevated at the beginning of the elevation and to be gradually inclined forward after the elevation up to a predetermined height.SOLUTION: A chair with an auxiliary mechanism includes: a seat frame to which a seat 1 and right and left arm rests 2 are attached a back frame to which a back rest 3 is attached a bottom frame and an auxiliary mechanism. The auxiliary mechanism includes: an elevating/lowering mechanism connected to the seat frame and the back frame so as to elevate/lower the frames and a drive body. The seat frame and the back frame are connected to be integrally elevated/lowered when at least one of the frames is elevated/lowered. Then, the seat 1, the right and left arm rests 2, and the back rest 3 attached to the frames are integrally elevated/lowered. The drive body includes a fixing part and an expandable movable part. The seat, the arm rests, and the back rest are nearly horizontally elevated at the beginning of the elevation, further inclined forward as the elevation is advanced, integrally lowered when the seat frame and the back frame are lowered by the contraction of the movable part, lowered with the decreasing forward inclination at the beginning of the lowering, and nearly horizontally lowered as the lowering is advanced.COPYRIGHT: (C)2015,JPO&INPIT【課題】座面が上昇当初は略水平に上昇し、所定の高さまで上昇すると次第に前傾して、着座者の起立を補助できるようにする。【解決手段】座1と左右の肘掛け2とを取付けた座フレームと背凭れ3を取付けた背フレームと、底フレームと補助機構を備えている。補助機構は座フレームと背フレームに連結されてそれらを昇降可能な昇降機構と駆動体を備え、座フレームと背フレームは少なくとも一方が昇降すると他方も一体的に昇降できるように連結されて、それらフレームに取付けられている座1と左右の肘掛け2と背凭れ3が一体的に昇降可能としてある。駆動体は固定部と伸縮式の可動部を備え、上昇当初は略水平に上昇し、上昇が進むにつれて前傾が急になり、前記可動部の縮小により座フレーム及び背フレームを降下させると一体的に降下し、降下開始当初は前記前傾が戻りながら降下し、降下が進むと略水平に降下するようにした。【選択図】図1
