| 摘要 |
PROBLEM TO BE SOLVED: To suppress play of a carriage in various directions by supporting it at three points. SOLUTION: Since the carriage 23 is urged by each urging part 34 in the direction reverse to that shown by an arrow A, each sliding face 31b, 31c of each first guide 31 of the carriage 23 is pressed against a first guide shaft 25 by the vertical component of a force acting on the carriage 23 as shown by an arrow B. A force acting on the carriage 23 in the direction reverse to that shown by an arrow A is directing to deviate from the first guide shaft 25. Consequently, a moment centering the first guide shaft 25 is generated in the carriage 23 and the sliding face 32b of the second slide 32 is pressed against a second guide shaft 33 by that moment as shown by an arrow E. When viewed from the side face, the carriage 32 is supported at three points, i.e. the sliding faces 31b and 31c of the first slide 31 and the sliding face 32b of the second slide 32. COPYRIGHT: (C)2004,JPO
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