| 摘要 |
PROBLEM TO BE SOLVED: To provide a strut in a double floor capable of separating a nut screwed to a screw shaft from a nut holder for holding a floor board to combine them by a simple operation in order to screw a nut body supporting the floor board to the screw shaft erected from a foundation floor. SOLUTION: Four screw shafts are erected on a contact plate set on the foundation floor, and the strut on the double floor supporting each corner of the floor board collected by each nut body screwed to each screw shaft is provided. The strut in the double floor comprises the nut for screwing the nut body to the screw shaft and the nut holder formed of a pocket provided to an introduction way inserting the nut from the horizontal direction and provided at the backside the introduction way to hold so as to make the nut impossible to rotate and to vertically move and an insertion hole passing through the pocket to vertically insert the screw shaft. COPYRIGHT: (C)2004,JPO
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