| 摘要 |
PROBLEM TO BE SOLVED: To preclude other end part of a bearing shaft from floating up even when an attaching bolt is tightened, without welding a washer. SOLUTION: This structure for attaching wheel provides a pair of side walls 34 in a travel frame 7, the recess 39 of open lower end shape in lower end parts of the paired side walls 34, an engaging part 41 in both end parts of the bearing shaft 40 for supporting a wheel 12 rotatably, and arranges the shaft 40 between the paired side walls 34, wherein the engaging part 41 of the shaft 40 is engaged with the recess 39 in each of the respective paired side walls 34, and an attaching bolt 43 is screwed in the both end parts of the shaft 40 along an axial direction from an outside of the side walls 34 to fix tighteningly the shaft 40 to the paired side walls 34 by the bolt 43. An engaging mechanism 49 engaged to prevent the engaging part 41 of the bearing shaft 40 from coming off from a lower end opening of the attaching recess 39 is provided between the bearing shaft 40 side and the side wall 34 side.
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