| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a soundproof joint pipe which can enhance soundproof performance and for which joining work can be smoothly performed. <P>SOLUTION: A soundproof joint pipe 11 includes a joint pipe body 12 and a soundproof layer 13 provided to the outer circumference thereof. The joint pipe body 12 has a bent pipe part 12a and connecting part 12b. The soundproof layer 13 includes an inner circumferential sound insulation layer 14, a sound absorbing layer 15, and an outer circumferential sound insulation layer 16. The sound absorbing layer 15 includes an inner circumferential sound absorbing layer 15a provided only to the bent pipe part 12a and an outer circumferential sound absorbing layer 15b provided from the bent pipe part 12a to the connecting part 12b. Owing to the allocation of the inner circumferential sound absorbing layer 15a and the outer circumferential sound absorbing layer 15b, the thickness of the sound absorbing layer 15 located to the connecting part 12b is smaller than the thickness of the sound absorbing layer 15 located to the bent pipe part 12a. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
