| 摘要 |
PROBLEM TO BE SOLVED: To provide a strut in a double floor applying an efficient locking structure for preventing the slack of a nut body in order to screw the nut body supporting a floor board to a screw shaft erected from a foundation floor. SOLUTION: The strut in the double floor is so constituted that four screw shafts are erected on a contact plate put on the foundation floor and that the strut in the double floor forming a press-contact section carrying out the locking by press-contacting to the outer circumference of the screw shaft is provided to the nut body in the strut in the double floor supporting each corner of the floor board collected by each nut body screwed to each screw shaft. COPYRIGHT: (C)2004,JPO
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