LOWER FRAME OF SLIDING DOOR

PROBLEM TO BE SOLVED: To solve trouble at the time of the passage of a wheel chair by fixing a falling stop, in which height and width are specified and which is continued in the longitudinal direction of rails, between the rails of a lower frame body, in which the rails for a sliding door parallel in the depth direction are formed on a top face. SOLUTION: Falling stops 3 preventing the falling of the wheels (the wheels having a small diameter of a wheel chair) 4 of the wheel chair are fixed among a plurality of rails 2, 2 for a sliding door parallel in the depth direction of a lower frame body 10. The falling stops 3 are brought into contact with the wheels 4, and consist of support sections 31 supporting the wheels 4 and mounting sections 32 continued to the support sections 31 and used for fastening on the lower frame body 10, the height of the support sections 31 is equalized or approximately equalized to the upper ends of the rails 2, width is made smaller than the width of the rails 2, and the support sections 31 are continued in the longitudinal direction of the rails 2. The support sections 31 prevent the falling of the wheels 4 between the rails 2, 2 by supporting the wheels 4 between the adjacent rails 2, 2, and reduce the vertical motion of the wheels 4 at a time when the wheel chair is passed on a lower frame 1.