| 摘要 |
<p>PROBLEM TO BE SOLVED: To absorb dimensional dispersion of each part of a seat and a vehicle to acquire smooth and stable sliding motion without requiring additional parts or operation while keeping low costs, and to reduce the frictional resistance and to improve operability. SOLUTION: On the both sides of the bottom of a body part 12a of a long lower rail 12, a roller bearing step part 12f is formed. An upper rail 13 is formed with a body part 13a and a vertical wall 13e projecting upward from the center of an upper wall 13d and further projecting from an opening 12e. A roller 27 is inserted between the step part 12f, formed on the bottom of the body part 12a of the long lower rail 12, and the upper wall 13d, formed on the body part 13a of the upper rail 13. On both the sides 27a of the roller 27, an arch surface 27d is formed, which is fitted to an arch surface 28 of the step part 12f.</p> |
