| 摘要 |
PROBLEM TO BE SOLVED: To provide a suction port body capable of inhibiting wear of a roller caused by contact with a floor surface. SOLUTION: One end side of a cylindrical flexible roller body 77 of the roller 58 is closed by a closing face 77a, and a gear part 78 is disposed to project in the radial direction on the outer peripheral face of the other end side in the axial direction of the roller body 77. As the space 84 on the gear part 78 side of the roller body 77 is flexibly deformed in the direction of the center axis when the gear part 78 is brought into contact with the floor surface, the wear of the gear part 78 of the roller 58 caused by the contact with the floor surface can be inhibited for a long period of time. COPYRIGHT: (C)2008,JPO&INPIT
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