| 摘要 |
PROBLEM TO BE SOLVED: To provide a suction duct which can cope with a collected matter such as heavy debris.SOLUTION: In a first suction duct (suction duct) 41 arranged at a suction collecting device which sucks collected matters from a suction port 4a, and collects the collected matters, a plurality of short pipes 121, 121 ... are connected to one another in an axial direction, and the adjacent short pipes 121, 121 are constituted so as to be relatively turntable with a turning shaft 125 orthogonal to an axial line as a center. The suction duct has a flexible pipe part 120 in which a first short pipe (short pipe) 121A which adjoins one side of a second short pipe (short pipe) 121B in an axial direction, and a third short pipe (short pipe)121C which adjoins the other side of the second short pipe are different in turning directions with respect to the second short pipe 121B.SELECTED DRAWING: Figure 5 |
