| 摘要 |
A linear-motion device has: a slider (2) provided onto a guide rail (1) relatively movably; and a plurality of rolling elements (3) for causing the slider to move relatively in a longitudinal direction of the guide rail; whereby the slider comprising a slider block (2A) having rolling-element rolling grooves (11) that oppose to rolling-element rolling grooves formed on the guide rail (10), and end caps that close both-end openings of the rolling-element rolling paths formed between the rolling-element rolling grooves on the slider block and the rolling-element rolling grooves on the guide rail, and rolling-element return paths (13) for returning the rolling elements, which have rolled in the rolling-element rolling paths, are formed on the slider block, wherein the rolling-element return paths comprises a groove portion (20) formed on an outer surface of the slider block along the longitudinal direction of the guide rail, and a cover member (24) for covering the groove portion. <IMAGE> |
