CN2238341Y

CN2238341Y - Expansive rivet

Info

Publication number: CN2238341Y
Application number: CN 95229023
Authority: CN
Inventors: 杜伯民
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-12-26
Filing date: 1995-12-26
Publication date: 1996-10-23
Anticipated expiration: 2005-12-26

Abstract

The utility model relates to an expansion nail for expansion anchorage, which is composed of a barrel-shaped expansion nail piece 1 and an expansion wedge nail piece 2. Radial direction interference anchorage for foundation boreholes can be formed in the process that a hammer is used to tamp the expansion wedge nail piece 2 which is arranged in the centre of the barrel-shaped expansion nail piece 1 to a required position. The utility model has the advantages of compact structure, few components, low cost, reliable anchorage, convenient operation, small diameters of boreholes, etc.

Description

Expandable nail

The utility model relates to a kind of expandable nail of the anchoring of expanding.

The EXPANSION ANCHOR BOLTS of using is to promote expansive screw by fastening nut at present, and according to the cone of lower end the expansion tube diameter is swollen, thereby realizes the radial interference anchoring to basis boring.So every cover EXPANSION ANCHOR BOLTS is requisite will to be made of expansion tube, expansive screw, nut and plain cushion, spring pad.Assembly is many, bore diameter is greatly conspicuous, and screw thread lifting efficient is low, and need add long bolt and screw thread in order to satisfy the screw thread lifting, and screw thread also can make the screw rod bearing cross-section reduce, and causes waste of material, also can not be ignored, resemble and be used for antitheft door and so on and install, also need take other measure to prevent to dismantle stolen.

The purpose of this utility model is for overcoming the deficiency of above-mentioned prior art, and provide a kind of simple in structure, materials are saved, the firm expandable nail of anchoring.

The utility model can reach by following measure.Screw thread promote expanded to change into be pressed into expansion.Its concrete implementation step is as follows: when pounding the expansion wedge ailing cap that is positioned at tubular expandable nail spare central authorities with hammer, axial pressure just can the tube end increasing buried depth degree of tubular expandable nail spare by its nail masthead, so the head of a nail of tubular expandable nail spare just can compress material installed gradually, when axial resistance during greater than some lobe barrel resistance of deformation, the pointed cone of expansion wedge nail part front end just can strut at the bottom of some lobe tubes, and some lobe barrels of ining succession are to dilatancy radially.Therefrom basis boring is formed the radial interference anchoring.

The utility model is compared with EXPANSION ANCHOR BOLTS, has compact structure, few, the saving material of assembly; Anchoring is firm, easy to operate, efficient is high; And basic bore diameter is little, so boring power consumption and labor intensity are all little.But also can be by changing head of a nail shape and combination collocation, whether can go the different anchoring effects of dismantling after constituting different assembling outward appearances easily and constituting anchoring again.

Following structure accompanying drawing further specifies concrete structure of the present utility model and enforcement:

Drawing is described as follows:

Fig. 1 is the utility model practical application expansible anchor fixing structure schematic representation;

Fig. 2 is tubular expandable nail spare of the present utility model (a 1) structural representation;

Fig. 3 is expansion wedge nail part (a 2) structural representation of the present utility model;

Fig. 4 is a kind of unawareness dismounting anchoring head of a nail combination collocation schematic representation of the present utility model;

Fig. 5 is a kind of anchoring head of a nail combination collocation schematic representation of being convenient to dismantle of the present utility model.

By as can be known shown in Figure 1: the utility model only has two parts, tubular expandable nail spare (1) promptly shown in Figure 2 and expansion wedge shown in Figure 3 nail part (2).Its expansion anchoring is to follow closely the head of a nail (10) of part by pound the expansion wedge that is loaded on tubular expandable nail spare central authorities with hammer, and axial pressure is just passed to the tube end (5) of tubular expandable nail spare by pointed cone (9) through nail bar (8).Though the slot (6) of some wide, long appropriateness along barrel (4) being cut into some lobes with the barrel of suitable length at the bottom of the tube, because of the gap between at the bottom of some lobe tubes less than expansion wedge nail part nail shank diameter.So, at the bottom of expansion wedge nail part under the constraint of barrel resistance of deformation can only head on tin, strengthen the buried depth degree.Obviously, along with the increasing of buried depth degree, the head of a nail (3) can compress material installed (12) gradually, and it is also bigger than barrel resistance of deformation that its axial resistance just can become thereupon.So the pointed cone of the forward end of expansion wedge nail part ability struts at the bottom of some lobe tubes, the barrel of ining succession is divided into some lobes to radially distortion expansion, thereby to the anchoring of basis (11) boring formation radial interference; Anti-slip tank (7) then makes anchoring more firm, simultaneously, because of at the bottom of the nail bar not only protrudes tin, and is the interference assembling, so the nail bar is difficult to withdraw from automatically or become flexible.By Fig. 4, Fig. 5 as can be known: the mutual combination collocation of the difformity head of a nail, not only can obtain different anchoring appearance, but also can realize the purpose that whether can dismantle again after the anchoring easily, shown in Figure 4, head of a nail part because of expansion wedge nail part, embed among the tubular expandable nail spare head of a nail, and exposed parts is half smooth knob again, so be difficult to utilize instrument to dismantle; And shown in Figure 5 just different, folded mutually because of being the garden arc between the head of a nail mutually with inverted cone.So there is appropriate gap the border between two heads of a nail, is enough to prize expansion wedge nail part and dismantles for the insertion of nail nipping instrument.Tubular expandable nail spare is all made with the normal carbon steel or stainless steel usually with expansion wedge nail part, but in order to satisfy some specific (special) requirements, tubular expandable nail spare is also made with electric conductivity good non-ferrous metal or the good plastic or other material of insulating property sometimes.

Claims

1, a kind of expandable nail of the anchoring that is used to expand comprises tubular expandable nail spare (1), expansion wedge nail part (2), it is characterized in that under the axial pressure effect expansion wedge nail part (2) can make tubular expandable nail spare (1) external diameter expand.

2, expandable nail according to claim 1, it is characterized in that tubular expandable nail spare (1) is by the head of a nail (3), barrel (4), slot (6) some lobes to be cut in (5) at the bottom of the tube and part barrel (4), and be shaped on anti-slip tank (7): expansion wedge nail part (2) is by the head of a nail (10), nail bar (8) pointed cone (9).

Can 3, expandable nail according to claim 1 is characterized in that the variation by the head of a nail (3) with (10) shape and the combination collocation of tubular expandable nail spare (1) and expansion wedge nail part (2), can constitute go dismounting after different assembling outward appearances and the anchoring again.

4, expandable nail according to claim 1 is characterized in that tubular expandable nail spare (1) and expansion wedge nail part (2) can make of the normal carbon steel or stainless steel; Tubular expandable nail spare (1) also can be with electric conductivity good non-ferrous metal or the good making such as plastics of insulating property.