Structure for vehicle seat

1. A seat structure for a vehicle, comprising:

fixation members fixed to a floor at positions away from each other in a front-rear direction;

a slide rail including an aluminum stationary rail held by the fixation members and a movable rail movable with respect to the stationary rail in the front-rear direction,

wherein the stationary rail has sidewalls extending vertically and extending in the front-rear direction;

a seat cushion fixed to the movable rail;

a seatback supported by the seat cushion;

an iron reinforcement plate fixed to the stationary rail at a position inside a safety belt used area and outside regions having the fixation members;

engagement portions protruding in a width direction from the sidewalls of the stationary rail;

folded regions in the reinforcement plate that fold the reinforcement plate toward the sidewalls of the stationary rail in the width direction; and

terminal portions of the reinforcement plate extending in the width direction from the folded regions of the reinforcement plate toward the sidewalls of the stationary rail,

wherein the terminal portions of the reinforcement plate abut the engagement portions of the stationary rail to engage the reinforcement plate with the stationary rail and to fix the reinforcement plate to the stationary rail.

2. The seat structure for vehicle according to claim 1 , wherein engagement openings with which a latch is engageable are formed in one of the sidewalls of the stationary rail, and the one of the sidewalls is thicker than an other of the sidewalls of the stationary rail.

3. The seat structure for vehicle according to claim 1 , wherein the iron reinforcement plate reinforces the sidewalls.