| 摘要 |
PROBLEM TO BE SOLVED: To provide a coupling surface into which a lift roller is not dropped when a lift elevates or lowers the inner surface of a guide rail by rolling the lift roller. SOLUTION: The guide rail 6 is provided upright by coupling a plurality of sections together. A holding member 15 is fixed to the downward slope of a first connecting part 13 of a lower step whose connecting surface is inclined. A holding member 15 is fixed to the upward slope of a second connecting part 14 of an upper step. A plate 19 is held between the holding members 15 of the upper step and the lower step. The lift roller 10 smoothly rolls on a contact part with the connecting surface of the guide rail 6. Thus, noise such as abnormal sound/vibration is effectively prevented. COPYRIGHT: (C)2004,JPO
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