Seat slide device for automotive vehicles

Abstract

A seat slide device for automotive vehicles including a lower rail to be fixed to a floor panel of an automotive vehicle, an upper rail slidably fitted to the lower rail, a lock plate capable of locking, at a desired position, a sliding movement of the upper rail in which the lock plate is pivotally supported by the upper rail, and a seat bracket for fixing a seat cushion which is secured to the upper rail. The lower rail includes, when viewed in a direction of an end face thereof, two side wall portions bent upwardly from two sides of a bottom wall portion, top wall portions bent inwardly in mutually opposing directions like a fishing hook from upper ends of the side wall portions, and vertically-downwardly extending wall portions. The upper rail includes a pair of generally L-shaped plates each of which includes a horizontal wall portion which is bent like a fishing hook from a lower end portion of a vertical wall portion and a raised wall portion. The pair of L-shaped plates being abutted with each other at the back sides of the vertical wall portions and fixed together to form a vertical wall unit. The vertical wall unit of the upper rail is situated at a central portion of a space formed between the opposing downwardly-extended wall portions of the lower rail and the raised walls being situated in spatial areas formed between the side wall portions and the downwardly-extended wall portions.