| 摘要 |
PROBLEM TO BE SOLVED: To prevent disengagement between an upper rail and a lower rail in a more preferable way.SOLUTION: A reinforcing member 50 is mounted to at least one of an upper rail 30 and a lower rail 20. The reinforcing member 50 includes: a sheet-like base material 52 having flexibility that can be bent along a contour of a rail member R1; and a linear fiber body 54 having an expansion and contraction property in a longitudinal direction inferior to that of the base material 52 in which a force is applied in a direction to expand or contract the fiber body 54 in the longitudinal direction when the upper rail 30 or the lower rail 20 is bent and deformed. |
