Expansion nail

Abstract

The invention relates to an expansion nail. The expansion nail comprises a sleeve, a screw and a positioning rod; the sleeve sleeves the outer periphery of the positioning rod; a gap is formed betweenthe inner wall of the sleeve and the outer wall of the positioning rod; a screw hole, cooperating with a screw rod of the screw, is formed in the positioning rod; a baffle plate stopped at one end ofthe sleeve is arranged at the end, far from the screw, of the positioning rod; a nail cap stopped at the other end of the sleeve is arranged at the end, far from the baffle plate, of the screw; the diameter of the nail cap is larger than the inner diameter of the sleeve; expansion grooves are uniformly distributed in the axial direction of the peripheral wall of the sleeve; the sleeve between theadjacent expansion grooves forms an expansion bar; a V-shaped groove is formed in the end, near the baffle plate, of the expansion bar, so that a V-shaped expansion block is formed on the expansion bar; and when the screw is screwed in the screw hole, the nail cap extrudes the sleeve to drive the expansion bar in the V-shaped groove to deform out, so that the V-shaped expansion block is projectedout to form a barb. The expansion nail can be firmly supported in a hole, is higher in connecting strength with a wall, can bear higher strength, cannot generate the falling condition, and is safe and convenient to use.

Description

technical field [0001] The invention relates to the technical field of fasteners, in particular to an expansion nail. Background technique [0002] In the field of fasteners, expansion nails are widely used. For example, when installing other hanging objects on the walls, beams, columns, etc. of buildings, it is generally necessary to drill holes in the positions required by the building, and then install expansion nails in the holes. , and then fix other hanging objects on the expansion nails. Currently common expansion nails are composed of a screw and an outer sleeve. Expansion joints are provided on the sleeve. The volume of the sleeve can be changed by changing the relative position of the screw and the sleeve to achieve the purpose of fixation. However, during the use of expansion nails, the opening of the expansion nail will often loosen first, causing a gap between the expansion nail and the wall, which will affect the firmness between the expansion nail and the wal...

AI Technical Summary

Problems solved by technology

However, during the use of expansion nails, the opening of the expansion nail will often loosen first, causing a gap between the expansion nail and the wall, which will affect the firmness between the expansion nail and the wall hole, especially in walls with low density. Inside, such as aerated block walls, gypsum board walls and hollow brick walls, etc., the expansion nails are not installed firmly and are easy to loosen

In addition, after the expansion nail is assembled, the screw and the sleeve are closely bonded, and it is very difficult to disassemble. The disassembly process easily deforms the screw and cannot be reused, which is a waste of resources. Moreover, the expansion nail stays on the wall, which affects the decoration effect and is not beautiful.

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