JPS609452Y2 - nail - Google Patents

Description

[Detailed description of the invention] This invention relates to nails used in foamed concrete and various types of heat insulating materials.

Nails driven into materials with restoring elasticity, such as wood, can be sufficiently fixed and prevented from falling out by the tightening force generated by the contraction of the material itself, even if the legs are straight. .

However, if the material itself does not have any restoring elasticity, such as foamed concrete or insulation material, the only effect of fixing the nail or preventing it from falling out is the frictional force at the contact area, so nails with straight legs are used. This results in the drawback that it loosens or comes loose due to slight vibrations.

For this reason, a split-leg nail is provided in which the leg is divided into a plurality of parts along the axial direction, and the tip of the leg opens when driven.

However, with conventional split-leg nails, only the legs that open as they are driven in have a retaining effect, so although they have more pull-out resistance than straight nails, the legs open when a strong pull-out force is applied. There is a problem in that it deforms to follow the shape of the leg while being pulled out, making it impossible to obtain a strong retaining force.

This idea was made to solve the above-mentioned problems with split-leg nails, and it is possible to significantly improve the pull-out strength by using an elastic body that is deformed into a lump between the split legs. The purpose is to provide a nail that can be opened.

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

As shown in the figure, the needle body 1 is cut out from a leg 2 and a head 3 provided at the end thereof, and the leg 2 is divided into leg pieces 2a and 2b by a cut 4 made from the tip along the axial direction. ing.

An elastic body 5 is inserted and incorporated into the cut 4 in the leg 2, and a retaining ring 6 fixes the leg pieces 2a and 2b in a state where the elastic body 5 is compressed from both sides at a position near the tip of the leg 2. is inserted.

In addition to the illustrated ring, the retaining ring 6 may be a washer or may be tied with a wire.

In the case of the embodiment shown in FIGS. 1 to 4, the elastic body 5 is
A long rubber plate 5a having a width matching the diameter of the leg 2 is used, and the rubber plate 5a is formed so that it becomes thicker toward the bottom as shown in FIG. When the leg portion 2 is inserted into the body and compressed, the elasticity of the leg portion 2 to open the leg portion 2 is increased on the tip side.

In this way, increasing the push-opening elasticity on the tip side of the leg 2 improves the ability to open the leg pieces 2a and 2b during driving.As shown in Figure 2, the tip of the leg 2 is aligned with the axis Even if it is formed on a right-angled flat surface 7, reliable leg opening can be obtained.

Furthermore, in order to further improve the opening properties of the leg portion 2, the tips of the leg pieces 2a and 2b may be formed into inclined surfaces 8 that fall toward the incisions 4, as shown in FIG.

The elastic piece 5 may be a leaf spring 5b formed in an S-shape as shown in FIG. 5, or a rubber plate 5a as shown in FIG. As shown in the example, the leg part 2 is compressed in the axial direction by the driving member A and deformed into a block shape, and the leg pieces 2a, 2 are
b is pressed against member A to improve the retaining effect.

The nail of this invention has the above-mentioned configuration and is used when fixing an exterior plate B etc. to a member A such as foamed concrete or various heat insulating materials.

Driving is performed by striking the head 3 in the same way as with a normal nail, and with the retaining ring 6 in contact with the exterior plate B, the leg 2 enters the member A and the leg piece 2a , 2b is compressed by member A.

Since the leg pieces 2a and 2b on both sides are pressed outward in the radial direction by the elastic body 5, their tips open at the same time as they enter the member A, and when the needle body 1 is completely inserted, the third As shown in the figure, the legs 2a and 2b are opened on both sides within the member A, and the elastic body 5 is compressed toward the head between the legs and deforms into a lump.

The needle body 1 is prevented from coming out by opening the legs 2a and 2b and blocking the restoring force of the legs by the elastic body 5 deformed into a block.

In particular, when a rubber plate 5a or a synthetic resin plate with the same effect is used as the elastic body 5, when it is deformed into a lump, a strong rebound elasticity is generated, and the spread leg pieces 2a and 2b are pressed against the member A, causing friction. As the force increases, the rubber plate 5a acts as a retaining wedge, so that the pull-out strength is further increased.

As described above, according to this invention, a cut is made in the shaft portion of the needle body, and an elastic body is incorporated into this cut, so that the legs open when the needle is inserted, and the elastic body forms a lump between the legs. This results in compressive deformation, and the wedge-like retention effect of the blocky elastic body is added to the retention effect of the split legs, making it possible to significantly improve the pull-out strength, and it becomes possible to improve the pull-out strength by itself, like foamed concrete or insulation materials. Even when used on a member that does not have elasticity, it can be fixed without loosening or falling due to vibration.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of the nail according to this invention, Fig. 2 is a front view showing the same as above in an assembled state, Fig. 3 is a longitudinal cross-sectional view of the same in a driving state, and Fig. 4 shows other parts of the nail in the same manner as above. FIG. 5 is an enlarged front view showing an example of the elastic body, and FIG. 5 is a perspective view showing another example of the elastic body incorporated into the needle body. 1 is the needle body, 2 is the leg, 2a and 2b are the leg pieces, 3 is the head,
4 is a cut, 5 is an elastic body, 5a is a rubber plate, 5b is a leaf spring,
6 is a retaining ring, 7 is a flat surface, and 8 is an inclined surface.

Claims (5)

[Scope of utility model registration request] (1) The leg is divided into multiple parts with a cut made in the axial direction from the tip so that the leg can be opened during driving, and an elastic material that becomes a lump when compressed during driving is incorporated into the cut in the leg. A nail characterized by: (2) The nail according to claim 1 of the utility model registration, wherein the leg has a tip end formed into a flat surface perpendicular to the axis. (3) Utility model registration claim 1, characterized in that the legs are formed as inclined surfaces that fall toward the incisions.
Nails listed in section. (4) The nail according to claim 1, wherein the elastic body is formed of a rubber plate. (5) The nail according to claim 1, wherein the elastic body is formed of an S-shaped leaf spring.