Problem to be solved: to change the position of the projection member according to the size of the leg, and to make the projection member elastic.Solution: a semicircular projection member having elasticity having a degree of deformation when the weight of a person is applied is disposed corresponding to the floor of the floor and the base of the toe. A fastening member is affixed to the back side of the two projecting members, and the projection member is removably attached to the floor member from the fastening member adhered to the floor material. The fastening member is adhered to the floor material with a margin of a predetermined width corresponding to the fastening member, and the two projecting members are detachable.Since the two projections are resilient enough to be deformed by the weight of the human body, it is possible to push the root of the foot and toe appropriately and to give a strong stimulus by riding the person.Diagram【課題】脚の大きさに応じて突起部材の位置を変え、突起部材に弾性を持たす。【解決手段】床材に土踏まずと、足指の付け根に対応して、人の体重が加わると変形する程度の弾性を持った半円形の突起部材を配設している。当該2本の突起部材の裏側に締着材を貼り付けておき、床材上に貼り付けた締着受け材との間で前記突起部材を床材に着脱自在とする。床材上には前記締着材に対応しかつ所定幅の余裕を持って締着受け材を貼り付け、前記2本の突起部材を着脱自在とした。前記2本の突起部材は人の体重程度で変形する程度の弾性をもっているので、人が乗ることによって、土踏まずと足指の付け根を適度に押し上げて強い刺激を与えることになる。【選択図】図1
