JPH0433454Y2 - - Google Patents

Description

[Detailed description of the invention] (1) Industrial application field The present invention relates to nails used to attach steel plates to steel plates, and steel plates to other objects.

(2) Conventional technology and problems In the past, tapping screws were used to fasten attachments to steel plates, but installing the tapping screws was a two-step process: drilling a pilot hole with a drill and then screwing in the tapping screws. Installation work was being carried out. Furthermore, according to this method, when the pilot hole is drilled, chips are generated and adhere to the steel plate, causing rust. On the other hand, there is a method of driving and fastening the bolts into the steel plate using nails. For example, there are nails for steel plates that have a screw or knurl finish on the outer periphery of the body.
In either case, the steel plate, which was pushed apart when the nail was driven, has no choice but to rely on the restoring force of the steel plate trying to return to its original state, and only a small gap is created between the outer periphery of the nail and the adhesive surface of the steel plate due to vibration or impact. There was a problem that the fastening force decreased.

(3) Means for solving the problem In order to solve the drawbacks of conventional tapping screws and nails, the present invention uses a trough that gradually becomes smaller in diameter from the head 1 side to the tip 2 side, as shown in Figure 1. Part a
Contrary to this, a crest b is provided that gradually increases in diameter from the head 1 side to the tip 2 side, or conversely, as shown in Fig. 3, from the head 3 side to the tip 4 side. This nail attempts to solve the problem by providing a valley portion d that gradually becomes larger in diameter, and a peak portion e that gradually becomes smaller in diameter from the head 3 side toward the tip 4 side.

(4) Effect When the steel plate nail of the present invention is driven into a steel plate with a nail gun or the like, the steel plate 5 is pushed out by the peaks b and the valleys a shown in FIG. Since the contact portion between the peak portion b and the valley portion a returns to its original state due to the elastic force of the steel plate 5, the contact surfaces of the body portion and the steel plate 5 are firmly fastened after the nail driving is completed. Even if an external pulling force exceeding the elastic force of the steel plate 5 is applied to the nail, the crest b gradually becomes larger in diameter on the tip 2 side, so it exerts a retaining effect. If an external force is applied in the driving direction, the trough a becomes larger in diameter toward the head 1, and is therefore prevented from entering. In the second embodiment in which the relationship between the peaks and the valleys is reversed, the valleys d gradually become larger in diameter toward the tip 4, so that they exhibit a retaining effect. Further, when an external force is applied in the driving direction, the ridge e becomes larger in diameter toward the head 3, so that it is prevented from entering.

(5) Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to reference drawings.

FIG. 5 is a reference diagram showing a conventional example, in which a screw process f is applied to the outer periphery of the body. FIG. 6 is also a reference diagram showing a conventional example, in which the outer periphery of the body is knurled. Although the conventional examples shown in FIGS. 5 and 6 have irregularities on the surface of the body, the diameters from the outer circumference 6 on the head side of the body to the outer circumference 7 on the tip side of the body are the same.

In contrast to these conventional examples, the present invention has a trough a whose diameter gradually decreases from the head 1 side to the tip 2 side, as shown in Fig. Since the screw thread 8 is provided with a ridge b having a large diameter, the outer diameter of the outer periphery from the outer periphery on the head side of the body toward the tip 2 side changes. To explain this using the enlarged end view in Fig. 2, the trough B on the head side reaches the trough B' on the tip side, and gradually becomes smaller in diameter.
On the other hand, the peak A on the head side is the peak on the tip side.
It reaches A' and gradually becomes larger in diameter.

FIG. 1 shows an embodiment of the present invention.
As shown in the figure, the peaks h and valleys i may be straight from the head 9 side toward the tip 10 side. In this case as well, the outer diameter of the outer periphery of the trunk portion from the outer periphery on the head 9 side toward the tip 10 side changes. To explain this using the enlarged end view in Fig. 8, the trough F on the head side reaches the trough F' on the tip side, and gradually becomes smaller in diameter.
On the other hand, the crest E on the head side reaches the crest E' on the tip side, and gradually becomes larger in diameter.

In addition, the peaks and valleys in the body of the nail of the present invention are
As shown in Fig. 3, there is a trough d that gradually becomes larger in diameter from the head 3 side to the tip 4 side, and a peak e that gradually becomes smaller in diameter from the head 3 side to the tip 4 side. It may be a configuration. In this case, the outer diameter of the outer periphery of the trunk from the outer periphery on the head 3 side toward the tip 4 side is changing. To explain this using the enlarged end view of FIG. 8, the trough D on the head side reaches the trough D' on the tip side,
The diameter gradually becomes larger, and on the other hand, the peak C on the head reaches the peak C' on the tip side, and the diameter gradually becomes smaller.

(6) Effects of the invention Since the steel plate nail of the present invention is constructed as described above, when it is driven into a steel plate with a nail gun, etc., it is pushed out by the peaks b and the valleys a. steel plate and
Since the contact portion between the peak portion b and the valley portion a returns to its original state due to the elastic force of the steel plate, the contact surfaces of the body portion and the steel plate are firmly fastened after the nail driving is completed. Even if an external pulling force exceeding the elastic force of the steel plate is applied to the nail, the ridge portion b gradually becomes larger in diameter in the direction of the tip 5 of the body, so that it exerts a retaining effect. Further, when an external force is applied in the driving direction, the valley portion a becomes larger in diameter toward the head 1, so that it is prevented from entering. Similarly, contrary to the configuration described above, the crests and troughs gradually become larger in diameter on the side of the head 3, as shown in FIG.
Even if the trough portion gradually becomes larger in diameter in the direction of impact, the effect of preventing the ball from coming off and the effect of preventing it from entering in the driving direction can be obtained.

In addition, the steel plate nail of the present invention is extremely easy to manufacture using a rolling die, and can be provided in large quantities at low cost, and has a novel configuration that has never been seen before. Not only does it have significantly increased pull-out strength compared to conventional steel plate nails, but it also has
It has an extremely excellent effect of being strong against impact and can be fastened safely.

[Brief explanation of the drawing]

Figure 1 is a front view showing the first embodiment of the present invention, Figure 2 is an enlarged end view of the body, and Figure 3 is a front view showing the third embodiment of the present invention. Figure 4 is an enlarged end view of the same body, Figure 5 is the conventional example,
Fig. 6 is a conventional example, Fig. 7 is a front view showing the second embodiment of the present invention, Fig. 8 is an enlarged end view of the torso, 1, 3, 9... the head, 2, 4, 10...
Tip, 5... steel plate, 8... screw thread, a...
...trough, b...peak, B...trough on the head side,
B′...Trough on the tip side, A...Mountain on the head side,
A′...Mountain part on the tip side.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A nail having a head at one end of the body and a ridge and a trough formed in the body, where one of the crests and troughs has a diameter that is A nail that is characterized by a diameter that gradually increases from the head side to the tip and gradually decreases from the other side. (2) The nail according to claim 1 of the utility model registration claim, in which the crests and troughs are formed in a screw shape with the crests and troughs inclined at a constant angle with respect to the central axis of the nail. (3) The nail according to claim 1 of the utility model registration claim, in which the peaks and valleys are formed straight with respect to the central axis of the nail.