| 摘要 |
PROBLEM TO BE SOLVED: To provide a soundproof structure of a floor pan capable of improving the construction property for sticking a soundproof sheet while preventing reduction of rigidity strength of the floor pan. SOLUTION: Reinforcing ribs 3 are projectingly provided like a lattice on a lower face of the floor pan 1 made of synthetic resin, and a space below the floor pan is divided into smaller spaces 4 by the reinforcing ribs 3. A cut-out section 5 is provided in the reinforcing rib 3, and adjacent smaller spaces 4 are mutually communicated by the cut-out section 5 to form a group space 6. A connection part 2b positioned in the cut-out section 5 and a main constituent part 2a positioned in the smaller space 4 are integrated to form a shape of the soundproof sheet 2 into the same shape as that of the group space 6. The soundproof sheet 2 is stuck to the lower face of the floor pan 1 facing the group space 6. A reinforcing plate 7 arranged to overlap on a part of at least the group space 6 is attached along a lower side of the reinforcing rib 3. COPYRIGHT: (C)2008,JPO&INPIT
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