(57) An object of the present invention lower the production cost, providing a nail seat of convenient expansion screw nail in the assembly. A 2 in front of the nail seat that is formed by winding a one piece body One of the slots is provided, some of the long article hole is formed in the middle part, some equidistant tangential is provided in the lower nail seat, And some partial piece is provided, a circular piece and a lower circular piece upper that is equipped with a through-hole in front of the upper edge is provided, Hamase~tsu stage is formed in the bottom of the upper circular strip is fitted over the lower circular piece Semmizo is provided, when the single body is a wound to nail seat, the lower minute piece is folded outward is a bottom cover, Hamase~tsu fitted contact groove of the lower circle piece of the upper circle piece is Hama the stage forms the upper cover, the screw nail is accommodated in the nail seat, effectively saves raw material by the design of the upper circular strip and a lower circular pieces, to save manufacturing costs.
展开▼
