JPH0141844B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention mainly relates to a special nail called ALC used for so-called foamed concrete.

(Prior Art) As conventional special nails of this type, so-called cut nails and special nails have recently been used.

The cut nail is made of aluminum material,
The nail main body is a solid shaft member having a rectangular cross section, and the nail main body has a structure in which a tapered wedge-shaped taper portion is provided on the outer surface of the nail main body.

(Problems to be Solved by the Invention) However, the above-mentioned cut nail has a problem in that when vibration or the like occurs after driving is completed, loosening easily occurs between the foamed concrete and the nail main body.

(Means for Solving the Problems) The present invention has been made in view of such conventional problems, and the special nail for foamed concrete of the present invention has a nail head attached to the base end of the nail mainly made of pipe material. is provided, and is characterized in that a plurality of rows of conical recesses are provided on the outer circumferential surface of the main body of the nail, each having an apex on the side of the nail head and the recesses gradually becoming deeper toward the tip of the nail. .

The conical recess means that the recess has a substantially conical shape such as a cone. Therefore, nail-based
The internal space of the portion where the conical recess is formed gradually becomes wider from the tip of the nail toward the base of the nail.

Preferably, the conical recess is formed such that its depth continuously increases in the axial direction from the apex toward the tip of the nail, and the inner surface of the conical recess is formed at the tip of the nail main body. It is better if they are joined together.

Further, the nail body and the nail head are preferably made of stainless steel material.

(Function) Since the main body of the nail is made of pipe material, the nail itself has elasticity. Therefore, when driving the special nail into foamed concrete, the main body of the nail is elastically compressed and deformed,
Therefore, after completion of driving, the reaction force due to the compressive deformation acts elastically with the compression reaction force of the foamed concrete, ensuring complete fixation of the nail main body.

A plurality of rows of conical recesses are provided on the outer circumferential surface of the nail main body, and the conical recesses have a preventive effect against the foamed concrete, due to a synergistic effect with the elastic force of the nail main body itself. , to obtain an even stronger retaining effect.

Due to the recess provided on the outer peripheral surface of the nail main body, the elastic deformation of the nail main body in the radial direction is large, and after the nail is driven into foam concrete, there is a slight difference between the nail main body and the foam concrete due to vibration etc. Even if a gap occurs, the elastic restoring of the nail itself closes this gap and prevents it from loosening due to vibration.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

The first special nail for foamed concrete according to the present invention
10, the special nail 1 is a nail main body 2.
A nail head 3 is integrally attached and fixed to the base end 2a of the nail main body 2, and a plurality of conical recesses 4 are provided in parallel in the circumferential direction on the outer peripheral surface of the nail main body 2. As shown in the figure, it is used when fixing an appropriate member 6 to foamed concrete 5.

As shown in Fig. 8, the nail main body 2 is a hollow metal shaft made of a true cylindrical pipe with a circular cross section, and the material used is one with excellent rust prevention properties. Stainless steel is preferably used.

As shown in FIG. 7, the nail head 3 is made of stainless steel, like the head body 3a and the attachment nail body 2. The nail head 3 has the mounting shaft portion 3b attached to the nail main body 2.
It is fitted onto the base end 2a of the base end 2a and fixed by welding, caulking, or the like.

Specifically, two conical recesses 4 are provided, and these are formed on the outer circumferential surface of the nail main body 2 to face each other. The conical recess 4 is formed to extend in the axial direction of the nail main body 2. As shown in FIG. 1, the planar shape thereof is a conical shape having an apex 4a on the nail head 3 side, that is, on the base end side of the nail main body 2. Further, the depth of the conical recess 4 is from the top 4a to the tip 4b.
(See FIGS. 9, 10, and 6).
Further, as shown in FIG. 6, the inner surface of the conical recess 4 is joined to the inner surface of the other opposing conical recess 4 at the tip 4b to form a nail tip 7. The biconical recesses 4, 4 are formed by press working from both sides of the nail main body 2.

Therefore, the special nail 1 configured as described above
In FIG. 2, after positioning and applying the member 6 above the foamed concrete 5, the nail head 3 is struck from above with a hammer to drive the special nail 1 into the foamed concrete 5, and then Fix member 6.

At this time of driving, the nail main body 2 of the special nail 1 is
Since it is a hollow shaft material made of stainless steel and has elasticity itself, the nail main body 2 is elastically compressed and deformed as it is driven into the foamed concrete 5. Therefore, at the time of completion of driving, the reaction force due to compressive deformation of both the nail main body 2 and the foam concrete 5 acts elastically between them, and the entire surface of the nail main body 2 is covered with the foam concrete 5. This results in close contact with the contact surface, thereby ensuring complete fixation of the nail main body 2 and providing the desired retaining effect.

Moreover, since the two conical recesses 4, 4 provided in the nail main body 2 act to prevent the foamed concrete 5 from slipping out, this can be prevented by a cooperative action with the elastic force of the nail main body 2 itself. This results in an even stronger retaining effect. That is, the compressive reaction force of the foamed concrete 5 in the conical recess 4 acts in a distributed manner on the outer surface of the conical recess 4 and exerts stress in multiple directions, so loosening due to vibration is effectively prevented. This prevents the deterioration of the locking function over time.

Although the tips 4b and 4b of the nail main body 2 are open, the recess on the outer peripheral surface of the nail main body is a conical recess, and the internal space of the part where this conical recess is formed is Since it becomes wider as it goes from the opening toward the base end, even if foamed concrete enters the inside of the nail body from the tip opening, it will not impede the elasticity of the nail body.

The present invention is not limited to the above embodiments, but
Various design changes are possible.

(Effects of the Invention) As described in detail above, according to the present invention, a nail head is provided at the base end of a nail main body made of pipe material, and the nail head is provided on the outer peripheral surface of the nail main body on the nail head side. Since a plurality of rows of conical recesses are provided so that the recesses gradually become deeper toward the tip of the nail, various excellent effects can be obtained as listed below.

(1) Since the main part of the nail is made of pipe material, the nail itself has elasticity, and the outer circumferential surface of the main part of the nail has an apex on the nail head side and a recess that gradually becomes deeper toward the tip of the nail. Because of the formed conical recess, when a special nail is driven into foamed concrete, the main body of the nail undergoes elastic compression deformation, and after completion of driving, the nail body undergoes elastic compression deformation. The reaction force interacts elastically with the compressive reaction force of the foamed concrete, ensuring complete fixation of the nail main body, and providing a strong retaining effect.

(2) The multiple rows of conical recesses provided on the outer circumferential surface of the nail main body act to prevent the foamed concrete from slipping out, so this is combined with the elastic force of the nail main body itself to make it even more solid. It is possible to obtain a retaining effect.

(3) Foamed concrete has poor elasticity and is extremely brittle, so if any vibration is applied after a nail is driven, a small gap will be created between the nail surface and the foamed concrete, which may cause loosening. However, in the present invention, since the nail main body is made of a pipe and the conical recess is formed on the outer peripheral surface, the amount of elastic deformation of the nail main body itself is large.
Even if a minute gap is created due to vibration, the gap is closed by the elastic restoring of the nail, and the elastic force still acts to prevent loosening due to vibration.

(4) Since the main body of the nail is made of pipe material, the above-mentioned conical recess can be easily formed by adding press processing, etc., and when the nail head is provided at the base end of the main body of the nail, the special nail can be easily formed. Therefore, it is suitable for mass production, and the product cost can be reduced.

(5) By appropriately setting the pipe diameter and shaft length of the nail main body, large and small special nails can be easily mass-produced.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a special nail for foamed concrete according to an embodiment of the present invention, Fig. 2 is a longitudinal cross-sectional view showing the nail in use, Fig. 3 is a front view of the same nail, The figure is the same side view, Figure 5 is the same plan view, and Figure 6 is the same side view.
7 is a longitudinal sectional view of the same, FIG. 8 is a sectional view taken along the line - in FIG. 3, FIG. 9 is a sectional view taken along the line - in FIG. 3, and FIG. FIG. 10 is a sectional view taken along the - line in FIG. 3. 1... Special nail, 2... Nail main body, 2a... Base end of nail main body, 3... Nail head, 4... Conical recess, 4a...
The top of the conical recess, 4b...The tip of the conical recess, 5
...foamed concrete.

Claims (1)

[Scope of Claims] 1. A nail head is provided at the base end of a nail main body made of pipe material, and a recess is formed on the outer circumferential surface of the nail main body, with the apex on the nail head side and gradually becoming deeper toward the tip of the nail. 1. A nail comprising a plurality of rows of conical recesses formed in the nail. 2. Claims in which the depth of the conical recess increases continuously in the axial direction from the nail head side toward the tip of the nail, and the inner surfaces of the conical recess are joined to each other at the tip of the nail. The nail described in paragraph 1. 3. Claim 1 or 2, wherein the nail main body and the nail head are made of stainless steel material.
Nails listed in section.