PROBLEM TO BE SOLVED: To provide a stair lift which can be operated even in a narrow space and can safely and surely be supported by a simple constitution.SOLUTION: In the stair lift 100 in this embodiment, the stair lift 100 is attachable and detachable to/from a wheelchair or integrated with the wheelchair, or comprises a seat 210, and is used when ascending and descending on stairs while being mounted with a person. The stair lift also comprises: elongation/contraction support legs 300 which can move from retreat positions located rearward of the most front part of the stair lift 100 in a state that the person can get on it to operation positions for supporting the stair lift 100 when ascending and descending on the stairs and a support device 600 which holds the support legs 300 at the retreat positions and operates the support legs 300 when an abnormality is not detected, and inhibits the movement of the support legs 300 to the retreat positions from the operation positions when the abnormality is detected.COPYRIGHT: (C)2013,JPO&INPIT【課題】狭い場所でも操作でき、簡単な構成で安全かつ確実に支持することができる階段昇降機を提供することである。【解決手段】本実施の形態における階段昇降機100は、車椅子が着脱可能または車椅子と一体化され、或いはシート210を備え、人を搭乗させて階段を昇降する際に用いる階段昇降機100であって、階段昇降時に、人が搭乗可能な状態における階段昇降機100の最前部より後方である退避位置から、階段昇降機100を支持する作動位置まで移動可能な伸縮支持脚300と、異常不検出時には伸縮支持脚300を退避位置に保持し、異常検出時には伸縮支持脚300を作動させるとともに、伸縮支持脚300が作動位置から退避位置へ移動することを阻止する支持装置600を有する。【選択図】図1
