| 摘要 |
PROBLEM TO BE SOLVED: To enhance assembly work efficiency of a cab by eliminating the work of adjusting the roller position to the width between right and left guide rails. SOLUTION: In a front window 20, each adjustable roller 26 is provided on each roller shaft 25 arranged on four corners of a window frame 21, and each adjustable roller 26 automatically moves a roller body 27 in the axial direction of the roller shaft 25 to the width between right and left guide rails 19. Thus, in the front window 20, each adjustable roller 26 can be engaged with the guide rails 19 with the optimum engaging margin only by engaging each adjustable roller 26 with the guide rail 19. The assembly work efficiency can be enhanced by eliminating the position adjusting work of each roller 26 which has been necessary for each cab box 12. COPYRIGHT: (C)2008,JPO&INPIT
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