| 摘要 |
PROBLEM TO BE SOLVED: To arrange a wire screen on both the indoor and outer sides of a sliding door by one kind of lower member and longitudinal member when the lower frame can not be formed symmetrical in section at an opening part where the sliding door and the wire screen are stored, and the width in the depth direction of the longitudinal member is smaller than the width in the depth direction of the lower frame. SOLUTION: A lower frame 1 comprises a lower frame body 2 having a plurality of screw holes 2b arranged in the depth direction and a rail member 3 having a sliding door rail 3a and a wire screen rail 3b, overlapping a depth piece 2a of the lower frame body 2 and joined therewith. At least four screw holes 2b are formed in the lower frame body 2, and the distance between every other screw holes 2b, 2b is equal to the distance between two screw holes 4b, 4b formed in a longitudinal member 4.
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