| 摘要 |
PROBLEM TO BE SOLVED: To easily reduce a backward tilt angle of a seat according to a relative height of the chair where the height of the floor is increased toward the rear, and achieve it at low cost using the chairs of the same type at the each step. SOLUTION: This chair fixing angle changing system for changing a fixing angle to fix the chair 1 to a floor formed in tiered stand shape with a plurality of step parts whose height is set to be higher toward the rear every one or plural steps, is provided with a post 3 almost vertically extending being fixed to the corner part 2 of the step part so as to take a specified attitude to the floor face 2a behind the corner part 2 and having mounting parts 3d at a plurality of parts along the extending direction in such a manner that the angles of the mounting parts 3d to the floor face 2a behind the corner part 2 are reduced toward the upper part; and chair support members 4-11 mounted to the mounting parts 3d whose height from a floor face 2b in front of the corner part 2 to which the post 3 is fixed, is a specified height, out of the mounting parts at a plurality of parts of the post 3, to support the chair in such a manner as to form a specified angle to the mounting part.
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