JPH04129909U - nail - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a nail that can maintain excellent nail holding power without coming off even when used on brittle construction materials such as concrete. [Structure] A nail in which an expandable and retractable retaining collar is fitted into a circumferential groove provided in the body of the nail body so that the outer circumferential surface is substantially flush with the body, and the circumferential groove A tapered surface is formed on at least one of the nail tip side end surface of the collar and the nail tip side end surface of the retaining collar so that the nail tip side end surface becomes larger in diameter toward the nail tip.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to nails.

0002

[Conventional technology]

Round nails with a constant diameter body are commonly used for nailing construction materials, etc. , a screw nail with a spiral body, and a ring with a ring on the copper part to prevent it from falling out. Examples include nails.

0003

[Problem to be solved by the invention]

When driving these nails into highly elastic construction materials such as wood, The hammered nail is tightened by the elastic force of the member itself, so if the nail comes out, There weren't that many problems. However, these nails cannot be used for materials such as ALC, concrete, and fireproof field boards. When driving a nail into a building material made of a different material, the nail will not only be driven into the nail hole. , the area around the nail will also collapse. This means that the retention force of the nails in these members is This poses serious problems in terms of the fixing strength and safety of the parts, as it reduces the cause problems.

0004 This invention was developed in view of these circumstances, and its purpose is Even when used on so-called brittle construction materials such as concrete, Roha does not come off and has excellent durability. The objective is to provide nails that can maintain nail strength.

[0005]

[Means to solve the problem]

The nail of this invention has an expandable and retractable retaining collar in the circumferential groove provided in the body of the nail body. - is a nail that is fitted externally so that the outer circumferential surface is almost flush with the body, and the circumferential groove is At least one of the end surface of the nail tip side and the end surface of the nail tip side of the retaining collar. , the end surface on the nail tip side forms a tapered surface so that the diameter increases toward the nail tip. It is characterized by

[0006]

[Effect]

For example, when the nail of the present invention is driven into a building material such as a wall, When a force in the direction is applied, the nail body and the retaining collar move relative to each other in the axial direction. Since the diameter of the retaining collar can be expanded or contracted, the compatibility between the nail body and the retaining collar is Due to the movement, the diameter of the retaining collar expands due to the action of the tapered surface, allowing it to enter the nail hole. pressed against the surface. The force of the retaining collar trying to expand its diameter and the stress of the member are Once balanced, the nail body cannot move any further. In this way, you can prevent nails from falling out. Stop.

[0007]

【Example】

Hereinafter, one embodiment of the present invention will be described based on the drawings. Figure 1 is a front view of the nail of this example, and Figure 2 shows the nail of this example driven into a member. FIG. 3 is a cross-sectional view taken along the line A--A in FIG. 1. In the figure, 1 is a nail main body, and a body 2 is provided with a circumferential groove 3. circumferential groove 3 The end face on the nail head 4 side is formed almost perpendicular to the axis, and the end face on the nail tip 5 side is formed at the bottom of the groove. A tapered surface 6 is formed such that the diameter becomes larger toward the trunk portion 2.

[0008] A retaining collar 7 that can be expanded and contracted is fitted into the circumferential groove 3 of the nail body 1, and the nail of this embodiment is It consists of The retaining collar 7 has a C-shaped cross section (see Figure 3), and its The inner diameter is approximately equal to the outer diameter of the groove bottom portion of the circumferential groove, and the outer diameter is the same as the outer diameter of the groove bottom portion of the circumferential groove. It is approximately equal to the outer diameter of the second part of the body. Its length is approximately the same as the length of the circumferential groove 3 in the axial direction. be. Then, both end surfaces of the retaining collar 7 are aligned with the circumferential groove 3 of the nail body 1. shape, that is, one end face is an end face perpendicular to the axial direction, and the other end face is the end face at the tip 5. A tapered surface 8 is formed such that the diameter increases as it approaches.

[0009] Next, the nail of this example having the above-mentioned structure was attached to a fragile part such as an ALC. When fixing the member 10 by driving it into the nail body 1 (see Figure 2), The operation when a force F in the direction is applied will be explained. When a force F in the pulling direction is applied to the nail body 1 from the member 10, the locking collar 7 receives the frictional resistance of the member 9, so that the nail body 1 and the retaining collar 7 are aligned in the axial direction. Move relatively. Due to this relative movement, the diameter increases as it approaches the nail tip 5. Due to the action of the tapered surfaces 6 and 8 that are formed to become larger, the anti-slip collar A force in the direction of diameter expansion acts on -7, and the diameter of the anti-slip collar 7 becomes larger on the tapered surface. It expands accordingly. On the other hand, due to the enlarged diameter of the anti-slip collar 7, the collar 7 is The collar 7 is pressed against the inner surface of the hole, and stress acts on the member 9 to tighten the collar 7. Ru. Then, the force of the retaining collar 7 to expand its diameter and the stress of the member 9 are balanced. If they touch each other, the retaining collar 7 will not be able to expand its diameter any further. Therefore, the nail body 1 can no longer move in the removal direction from the member 9, and the nail is prevented from coming off. child The effect of preventing nails from falling out is that when the nail is driven in, the area around the nail is destroyed and the area is restored. This is particularly noticeable in the so-called fragile member 9 that cannot be used.

0010 In this embodiment, both the end surfaces of the nail body 1 and the retaining collar 7 are tapered. Although the surfaces 6 and 8 are provided, the present invention is not limited to this. At least one end surface of the roller 7 may be a tapered surface, or , the retaining collar 7 is expanded by relative movement between the nail body 1 and the retaining collar 7. As long as the diameter can be adjusted, a taper may be provided only on a part of the end face.

[0011] In addition, in this embodiment, a C-shaped cross section was used as the retaining collar 7. The nail body 1 is made of an elastic material that allows it to be inserted into the collar and expand its diameter. Alternatively, the retaining collar 7 may be cylindrical. Furthermore, in the present invention, the retaining collar 7 is attached to the member when the diameter is expanded. In order to increase the nail retention force against the nails, the surface of the collar 7 to prevent it from coming off has a smooth finish such as a satin finish. It may also be treated with a locking finish.

0012

【Effect of the invention】

When an external force is applied to the nail body in the direction of pulling out, the nail of the present invention The retaining collar moves relative to the nail hole, and the tapered surface expands the diameter of the retaining collar to secure the nail hole. Because it is pressed against the inner surface, it is suitable for brittle materials that lack elasticity to tighten nails. It also maintains excellent nail holding power.

[Brief explanation of drawings]

FIG. 1 is a front view of a nail of this embodiment.

FIG. 2 is a cross-sectional view taken in the axial direction with the nail of this embodiment driven into a member.

FIG. 3 is a sectional view taken along line A-A of the nail shown in FIG. 1;

[Explanation of symbols]

1 Nail body 2 Torso 3 Circumferential groove 5 Nail tip 6 Tapered surface of circumferential groove 7 Collar to prevent falling off 8 Tapered surface of retaining collar

Claims (1)

[Scope of utility model registration request] 1. A nail in which an expandable and retractable retaining collar is fitted into a circumferential groove provided in a body of the nail body, so that the outer peripheral surface thereof is substantially flush with the body; A tapered surface is formed on at least one of the end surface of the circumferential groove on the nail tip side and the end surface of the nail tip side of the retaining collar so that the end surface on the nail tip side becomes larger in diameter toward the nail tip. Nails characterized by: