| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To solve a problem in countermeasures for sound insulation of a drainage header to positively and easily perform sound insulation of the drainage header. <P>SOLUTION: This sound insulating device is used for the drainage header 10 formed by connecting a plurality of connecting units 10A-C to which drain branch pipes are connected, and converging drainage flowing in from the drain branch pipes, to drain it to a drain main pipe. Sound insulating units 30a-c of box shape are mounted surrounding the connecting units 10A-C for each of the connecting units 10A-C of the drainage header 10. Out of the sound insulating units 30a-c, connection parts 14 of the drain branch pipes to the connecting units 10A-C, the mutual connection parts of the connecting units 10A-C, and connection parts 13 of the connecting units 10A-C and drain main pipe 22, have a plurality of through parts 31. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
