| 摘要 |
PROBLEM TO BE SOLVED: To reduce weight while securing strength and rigidity; and to enhance the degree of freedom of layout of a piping member.SOLUTION: This revolving frame 1 includes a bottom plate 2, a pair of side plate 3, and a reinforcing member 6 which is welded to an inner surface of the bottom plate 2 and inner surfaces of the side plates 3. The reinforcing member 6 is disposed in such a manner as to cross the side plate 3 when seen from a direction perpendicular to the bottom plate 2, and arranged in such a manner that a threaded hole 2a, most adjacent to the side plate 3, among a plurality of threaded holes 2a for fixing the bottom plate 2 and a revolving bearing 10 is surrounded between the side plate 3 and the reinforcing member 6. |
