Patent ID: 10815054

Abstract:
An article transport apparatus includes a mast provided upright on the traveling body, an upper frame (6) coupled to an upper end portion of the mast and an upper rail (R2) that guides movement of the upper frame (6). Separately from guide rollers disposed on lateral opposite sides of the upper rail (R2), a first roller (18A) and a second roller (18B) that are rotatable about vertical axes (P1, P2) are disposed on opposite sides of the upper rail (R2). A first supporting member (19) supporting the first roller (18A) is attached so as to be biased by a first biasing body (22) in a direction to push the first roller (18A) against the upper rail (R2), and a second supporting member (20) supporting the second roller (18B) is attached so as to be biased by a second biasing body (22) in a direction to push the second roller (18B) against the upper rail (R2).