JP2994218B2 - Steel plate nails - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel plate nail for fixing an object to be fixed by driving the object into the steel plate using an automatic driving tool.

[0002]

2. Description of the Related Art For example, in order to fix a fixed object such as an exterior building material to a steel sheet, a nail for a steel sheet which is driven into the steel sheet from the fixed object by an automatic driving tool utilizing air pressure or the like is used. Such a nail has a tip portion at one end of a shaft portion and a head portion at the other end, and the head portion is hit by a driving tool or the like, and serves to press and fix the surface of the object to be fixed, The part is driven into the fixed object and into the steel plate.

[0003] There are two incompatible problems with this type of nail. One is to make it possible to drive the fixed object and the steel plate with the smallest possible driving force, and the other is to enable the driven nail to firmly fix the fixed object to the steel plate. Must be.

For this reason, as shown in FIG. 5, the conventional steel nail 1 has a large pitch thread portion 5 formed on the outer peripheral surface of a shaft portion 4 having a tip 2 at one end and a head 3 at the other end. Then, as shown in FIG. 6, when the steel plate B is driven into the steel plate B from the fixed object A, the frictional resistance between the shaft portion 4 and the steel plate B is increased, and the resin coating 6 is applied over the entire length of the front end portion 2 and the shaft portion 4. Thus, the frictional resistance at the time of driving was reduced.

When such a steel plate nail 1 is driven into the steel plate B from the fixed object A as shown in FIG. 6, when the tip 2 makes a hole in the fixed object A and subsequently penetrates the steel plate B, A cylindrical burr C is formed on the steel plate B, and the screw portion 5 provided on the shaft portion 4 forms the burr C.
By this, the fixed object A is fixed to the steel plate B.

[0006]

However, when the resin coating 6 is applied over the entire length of the shaft portion 4 from the tip end portion 2, as shown in FIG. The coating is peeled off when penetrating the steel plate B, but the resin coating 6 remains on the portion of the screw portion 5 that engages with the burr C, and the frictional resistance of the engagement portion between the screw portion 5 and the burr C is increased. Is reduced by the interposition of the resin film 6 and the effect of increasing the frictional resistance required by providing the screw portion 5 cannot be obtained. Therefore, when the driving force is reduced by the resin film 6, the fixed object A There is a problem that the pull-out resistance for fixing the wire is reduced.

Therefore, an object of the present invention is to fix an object to be fixed to a steel plate with a small driving force, and to firmly fix the object to a steel plate. An object of the present invention is to provide a steel plate nail that can be solved at once.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the invention according to claim 1 is directed to driving an object to be fixed into a steel plate.
For fixing steel to steel plate by fixing
A nail having a tip at one end of the shaft and a head at the other end,
A smooth portion is provided on the distal end side of the shaft portion, and a screw portion having a larger diameter than the smooth portion is provided between the smooth portion and the head.
Set the thread to a length that can pass through the thickness of the fixed object and the steel plate.
In the nail for a steel plate formed as described above, a configuration is employed in which a resin coating is applied to the tip portion and the smooth portion so as not to cover the screw portion.

[0009]

[Function] When a steel plate nail is driven into a steel plate from an object to be fixed, when the tip and the smooth portion penetrate the steel plate, frictional resistance is reduced by a resin coating interposed in the penetrating portion, and the driving force is reduced with a small driving force. Will be possible.

Since the resin film is applied only to the tip and the smooth part, when the tip and the smooth part penetrate the steel plate to form burrs, they are peeled off on the inner peripheral surface of the burrs, Although it adheres to the surface, the screw part that penetrates the steel sheet following the smooth part is larger in diameter than the smooth part,
At the step formed at the boundary with the smooth part, the screw part pushes out the burr and penetrates the steel plate while extruding the resin coating adhered to the inner peripheral surface of the burr.

Therefore, the resin film does not intervene in the engagement portion between the burr and the threaded portion penetrating the burr, and the two are directly engaged with each other, so that the frictional force between the threaded portion and the steel plate increases, and the fixed portion is fixed to the steel plate. Objects can be firmly fixed.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 1, a steel plate nail 11 according to the present invention is provided.
Has a tip portion 13 at one end of the shaft portion 12 and a head portion 14 at the other end. The shaft portion 12 has a smooth portion 15 having a straight circular axis shape on the tip portion 13 side, and a smooth portion 15 and a head portion. Between the portion 14 and the thread portion 16 is formed a multi-threaded screw having a larger pitch than the smooth portion 15 and having a large pitch.

A resin film 17 for reducing the frictional resistance during driving is applied to the outer surfaces of the tip portion 13 and the smooth portion 15 so as not to cover the screw portion 16.

The shape of the screw portion 16 may be selected depending on the type of the steel plate B, the material of the fixed object A, and the like.
The material of the resin film 17 may be any material that reduces frictional resistance with the steel plate B.

The nail for a steel plate of the present invention has the above-described configuration. To fix the fixed object A such as an exterior building material to the steel plate B, the head 14 is hit with an automatic driving tool. The steel plate nail 11 is driven into the steel plate B from the fixed object A.

First, the tip portion 13 makes a hole in the fixed object A, and then, as shown in FIG.
A burr C is formed around the periphery, and then the smooth portion 15 penetrates.

Since the resin film 17 is applied to the tip portion 13 and the smooth portion 15, the tip portion 13 and the smooth portion 15 are formed.
The frictional resistance of the inner peripheral surface of the burrs C is reduced, and the driving can be performed with a small driving force.

When the tip portion 13 and the smooth portion 15 penetrate the burr C, the resin film 17 is peeled off and adheres to the inner peripheral surface of the burr C as shown in FIG. Since the smooth portion 15 is in the shape of a straight circular axis, it does not give rotation to the steel plate nail 11 when penetrating the steel plate B, but penetrates with the frictional resistance reduced by the resin film 17.

Thereafter, the smooth portion 15 serves as a lead, and the screw portion 16 penetrates the inside of the burr C. Since the screw portion 16 has a larger diameter than the smooth portion 15, a screw is formed on the inner peripheral surface of the burr C. The mountain bites, and the screw portion 16 penetrates while rotating.

Since the diameter of the screw portion 16 is larger than that of the smooth portion 15, there is a step portion 18 at the tip end which is a boundary with the smooth portion 15, and when the screw portion 16 enters the burr C, The broken resin is swept out of the burrs C by the step portion 18 as shown in FIG.

As a result, the resin is wiped out from the inner peripheral surface of the burr C, and the inner peripheral surface of the burr C comes into direct contact with the screw portion 16.
The more the screw portion 16 advances inside the burr C, the more the frictional resistance increases.

After the driving is completed, the inner peripheral surface of the burr C and the thread portion 1
By the strong engagement of 6, a large pull-out resistance force is generated in the steel plate nail 11, and the object A can be firmly fixed to the steel plate B as shown in FIG. 4.

Next, the steel plate nail 11 of the present invention, the conventional steel plate nail 1 shown in FIG. 5, and the nail 11a obtained by applying a resin coating to the same nail as that of the present invention over the entire length of the screw portion are used. FIG. 7 shows the results of measurement of the pull-out resistance.

The measurement of pull-out strength was performed by measuring each nail at 2.3.
The screw was driven into a steel plate having a thickness of mm so that the threaded portion penetrated, and a tensile force was applied in the axial direction to measure the amount of axial movement generated in the nail.

As a result of the measurement, the steel sheet nail 11 of the present invention has the most excellent pull-out strength.

[0027]

As described above, according to the present invention, the shaft portion
A tip is provided at one end and a head is provided at the other end.
Side and a smooth part between the smooth part and the head
Provide a screw part with a diameter larger than that of the part, and
A steel plate formed with a length that can penetrate the thickness of the steel plate
In the nail, a resin coating is applied to the tip and the smooth part.
As it is applied so that it does not cover the threaded portion, the resistance generated at the time of driving into the steel sheet is reduced by the resin film, the fixed object can be fixed to the steel sheet with a small driving force, and the friction resistance between the screw part and the steel sheet is increased. And the pull-out resistance can be improved.

[Brief description of the drawings]

FIG. 1 is a front view showing a steel plate nail according to the present invention.

FIG. 2 is an enlarged cross-sectional view showing a steel plate penetrating state of a tip portion at the time of right driving of the above.

FIG. 3 is an enlarged cross-sectional view showing a state in which the smooth portion has penetrated the steel plate.

FIG. 4 is a longitudinal sectional view showing a driving state of a steel plate nail in which an object to be fixed is fixed to a steel plate.

FIG. 5 is a front view showing a conventional steel plate nail.

FIG. 6 is a longitudinal sectional view showing the driving state of the above.

FIG. 7 is a table showing measurement results of pull-out resistance of a nail for a steel plate according to the present invention and a conventional steel plate;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Nails for steel plates 12 Shaft part 13 Tip part 14 Head part 15 Smooth part 16 Screw part 17 Resin coating 18 Step part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-269707 (JP, A) JP-A-57-83709 (JP, A) Fully open 57-172911 (JP, U) Really open 1951 126873 (JP, U) Fully open sho 57-11325 (JP, U) Fully open sho 61-24509 (JP, U) Fully open Hei 3-4912 (JP, U) Fully open sho 61-194810 (JP, U) Jikken 39-1608 (JP, Y1) (58) Field surveyed (Int. Cl. ⁶ , DB name) F16B 15/00, 19/14

Claims (1)

(57) [Claims] (1) By driving a steel sheet from an object to be fixed
A steel plate nail for fixing an object to be fixed to a steel plate , wherein a tip portion is provided at one end of a shaft portion and a head portion is provided at the other end, and a smooth portion is provided at a tip portion side of the shaft portion, and the smooth portion and the head portion are provided. A screw part with a larger diameter than the smooth part is provided between the parts, and this screw part is
And a steel plate nail formed to have a length capable of penetrating the thickness of the steel plate, wherein a resin coating is applied to the tip portion and the smooth portion so as not to cover the screw portion. Nail for steel plate.