| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nail having a strong pull-out strength the same as a conventional nail, while preventing the breakage of a building material. <P>SOLUTION: A tapered end 2 of a nail 1 is composed of a curve 3 and a straight line 4 in a cross-sectional shape intersecting perpendicularly with an axis 12, and a shaft portion 8 of the side opposite to a head portion 7 side of the shaft portion 8 of the nail is configured so as to be composed of the curve 3 and the straight line 4 in the cross-sectional shape intersecting perpendicularly with the axis 12. <P>COPYRIGHT: (C)2012,JPO&INPIT |
