| 摘要 |
PROBLEM TO BE SOLVED: To improve the support performance of a side frame to an upper frame.SOLUTION: An upper frame 6a is disposed between a first flange part 21 and a second flange part 22 to be fixed to both flange parts 21, 22. Further, the upper frame 6a is connected with a side surface part 24 to restrict relative movements of the upper frame 6a and the side surface part 24. |
