| 摘要 |
PURPOSE:To prevent the generation of a tilt of a carriage by providing an elastic body having slidability to a subrail for guiding and gives force in the direction of sub-plain bearing and oblique upward direction to above-mentioned subrail for guiding. CONSTITUTION:The subrail 12b is thrusted by thrusting force of a leaf spring 22 in the direction of the sub-plain bearing 21 and obliquely upward direction. As its reaction force, the body 11 of a carriage is subjected to force in the direction of oblique downward to the right from the subrail 12b. The subrail 12 comes into contact with a part of the sub-plain bearing 21, and at the same time, a main rail 12a comes into contact with near left end of a main plain bearing 13b (13a). That is, contact point at which the main rail 12a and subrail 12b come into contact with plain bearings 13b, 21 by thrusting force of the leaf spring 22 becomes the same at all times. Consequently, tilting to right or left of the body 11 of the carriage to rails 12a, 12b due to the change of contact point with plain bearings can be prevented. |
