Patent ID: 8251428

Claim:
A seat slide apparatus for a vehicle comprising: a lower rail, formed into a longitudinal shape, adapted to be fixed to a vehicle floor and including a bottom wall portion which extends horizontally, side wall portions which extend upwardly from both ends of the bottom wall portion in a width direction thereof and first vertical wall portions which are bent downwardly at ends of the corresponding side wall portions; an upper rail adapted to be fixed to a lower portion of a seat frame for supporting a seat cushion, including an upper wall portion which extends horizontally, second vertical wall portions which extend downwardly from both ends of the upper wall portion in a width direction thereof and engagement wall portions which are bent upwardly at ends of the second vertical wall portions, thereby engaging with the corresponding first vertical wall portions, and assembled to the lower rail so as to be relatively movable in a longitudinal direction of the lower rail; and a detachment prevention mechanism including an elongated hole, which is formed at the bottom wall portion so as to open therethrough and which extends in the longitudinal direction of the lower rail, and a load receiving member whose upper end portion is directly or indirectly fixed to the upper wall portion of the upper rail and whose lower end portion is inserted downwardly through the elongated hole so as to be movable in an extending direction of the elongated hole, and is engageable with the bottom wall portion of the lower rail in the vicinity of the elongated hole so as to restrict a movement of the upper rail in an upper direction.