| 摘要 |
PROBLEM TO BE SOLVED: To provide a floor structure which is prevented from occurrence of plate squeaks and enhanced in fastening force between a substrate member 1 and a floor plate 2. SOLUTION: According to the floor structure which is formed by fastening the substrate member 1 and the floor plate 2 to each other by screws 3, each screw 3 has a distal end threaded portion 4 at a distal end thereof, a head-side threaded portion 6 at a base of a head portion 7, and an unthreaded portion 5 between the threaded portions. The distal end threaded portion 4 and the head-side threaded portion 6 are screwed in the same direction. Further the head-side threaded portion 6 is made longer in length than the distal end threaded portion 4, and the former is made smaller in screw pitch than the latter. COPYRIGHT: (C)2006,JPO&NCIPI
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