| 摘要 |
A linear movement table apparatus includes a cylinder tube having an axially extending slit in an upper surface, a screw shaft rotatably supported in the cylinder tube, a feed nut threadedly engaged about the screw shaft, and a table body having an integrally formed piston portion and a table portion. The feed nut is loosely fitted into a nut accommodating space of a half-cylindrical piston portion with minute gaps formed in the feed direction and in the rotational direction. The piston portion has expanding portions expanding outwardly and laterally from both lateral sides. The expanding portions are respectively guided by recessed guide surfaces formed in inner side surfaces of the cylinder tube. Axially extending sliding members are respectively attached to the expanding portions of the piston portion. Each sliding member is a leaf spring made from a synthetic resin. A sliding convex portion is formed on the upper surface of the sliding member and is downwardly flexible to apply spring preload to a sliding surface of the sliding convex portion.
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