| 摘要 |
PROBLEM TO BE SOLVED: To easily manufacture a fire resistant covered pipe excellent in sound insulating effect. SOLUTION: A cylindrical body 6 with a holding part 12 inserted in an inner hole is pushed forward into a cylindrical body passage 18 piercing a body part 13. When the cylindrical body 6 with the holding part 12 inserted therein passes a covering body forming part 14 provided at an outlet side part of the cylindrical body passage, fire resistant covering material 19 solidified by cement is supplied into a clearance 24 formed between the outer peripheral surface of the cylindrical body 6 and the inner peripheral surface of the covering body forming part 14, and a covering body 7 is successively formed on the outer peripheral surface of the cylindrical body 6 with the holding part 12 inserted therein, by the covering body forming part 14. The cylindrical body 6 with the covering body 7 formed and with the holding part 12 inserted is discharged from an outlet of the covering body forming part 14, and the holding part 12 is pulled out of the inner hole of the cylindrical body 6 with the covering body 7 formed on the outer peripheral surface. |
