| 摘要 |
PROBLEM TO BE SOLVED: To prevent increase of load which is to be caused by friction between a moving member and a rail by a method wherein a guide wheel which is in contact with a rail side surface of a tray holder and regulates the tray holder so so not to come off from the rail is so installed that its radial direction faces upward in the device traveling direction side by inclining its shaft, and the moving member is lifted. SOLUTION: A shaft whole 23 to which a bearing shaft retaining a guide bearing of the bottom surface of a tray holder 3 is fixed is inclined to the back side as it becomes deeper (upper). The shaft of the guide bearing is so inclined that the radial direction of the guide bearing faces upward from the level in the device traveling direction side. The guide bearing progresses in a direction inclined upward as shown by an arrow 21, when it comes in contact with the side surface of a rail 9, and generates a force lifting the tray holder 3, as shown by an arrow 22. Accordingly, there is an increase of load which is caused by contact of the guide bearing with the side surface of the rail 9. Since the tray holder 3 is lifted and friction with the rail is reduced, large increase of load is not generated, and right attitude is kept. |
