| 摘要 |
PURPOSE: To simplify the assembly work in a penetration structure of a soundproof wall, to reduce the number of part item, and to improve the effect to prevent the rain from entering and the soundproof effect. CONSTITUTION: Noise insulation plates 10a, b are arranged inside a soundproof wall 2, waterproof covers 11a, b are arranged outside, and a packing 13 to be closely adhered to a connection tube 1 is arranged between the noise insulation plates 10a, b, bolts 10a to be fitted and fixed to a noise insulation plate 12a are tightened and fixed through a fitting hole 2a of large diameter in the soundproof wall, the packing 13, and the waterproof covers 11a, b, and the putty 14 is applied to the clearance between the connection tube 1 and the waterproof covers 11a, b. |
