| 摘要 |
PROBLEM TO BE SOLVED: To provide a pipe inner surface polishing device capable of improving air permeability in a pipe body during polishing.SOLUTION: A polishing section 12 mounted in a shaft section 11 comprises a contact surface 122c which is brought into contact with an inner surface of a pipe body 2 so as to perform polishing. The contact surface 122c radially displaces in relation to the shaft section 11 by centrifugal force generated accompanying rotation of the shaft section 11 and is brought into contact with the inner surface of the pipe body 2. A ventilation-enabled ventilation passage A along a direction parallel to the shaft section 11 is formed between a rotation locus of an outer surface of the shaft section 11 and a rotation locus of the contact surface 122c. Ventilation can be performed along the direction parallel to the shaft section 11 via the ventilation passage A, thereby improving air permeability in the pipe body 2 during polishing. |
