JPH0533767Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to nails that are driven into hard materials such as steel plates to fasten wall or roofing materials.

[Conventional technology and problems] Conventionally, screws were used to attach wall and roofing materials to hard materials such as steel plates. Installation using screws required skill to install, as the head bit part was fixed with a screwdriver, etc., and then the screws were pressed while adjusting the force to prevent them from falling. In addition, chips from the workpiece and steel plate are exposed on the surface of the workpiece through the spiral of the screw, which often causes rust due to dirt and iron powder. This has forced the work of removing the chips that have been removed.

The screw entry resistance in a steel plate formed by multiple screw helices of the same height is formed by the unevenness of the multiple screw helices, so the restoring elastic force of the steel plate cannot be utilized and the screws stick tightly to the steel plate. The only fastening points are under the head of the screw and the pressure on the surface of the workpiece, which may cause damage or collapse of the workpiece surface, or when vibration or impact is applied, the screws may loosen, making it difficult to securely connect the workpiece and steel plate. There was no hope for a conclusion.

Another method is to use a nail gun to instantly drive a nail into the steel plate, take advantage of the steel plate's resilience, and bring the nail into close contact with the steel plate surface, thereby fastening the construction material to the steel plate. When an external force is applied, the nail hole expands, and since the length of the nail from the central axis 9 is the same from the head side to the tip side, loosening and rattling are unavoidable.

[Purpose of the invention] This invention was made to solve the above-mentioned problems, such as the occurrence of rust due to dirt and iron powder due to the exposure of construction parts and steel plate chips on the surface of the construction parts. To provide a nail that can safely and reliably fasten a construction member to a steel plate or the like even when excessive external force such as vibration or impact is applied without causing any damage.

[Means for solving the problem] In order to solve the above problems, this invention alternately arranges long diameter protrusions and short diameter protrusions in the radial direction from the central axis of the body, and the long diameter protrusions are The length in the radial direction becomes gradually shorter toward the tip, and the length of the short diameter protrusion gradually becomes longer in the radial direction toward the tip.

[Operation] When the nail of the present invention is driven into a steel plate with a nail gun,
The contact area between the steel plate and the nail body that has been pushed apart by the nail body returns to its original state due to the restoring elasticity of the steel plate, so the contact surface between the nail body and the steel plate is firmly fixed after the nail is driven. conclude. Even if an external pulling force exceeding the restoring elastic force of the steel plate is applied, the short diameter protrusion on the nail head side gradually increases in radial length from the nail head side toward the tip, so it will not pull out. It exerts a locking effect, and when an external force is applied in the driving direction, the long diameter protrusion on the nail head side gradually becomes shorter in the radial direction as it moves from the nail head side to the nail tip side. This prevents extra nails from entering.

[Example] Hereinafter, an example of this invention will be described based on FIGS. 1 to 8 of the accompanying drawings.

As shown in Fig. 1, the length of the long-diameter protrusion 3 gradually decreases in the radial direction from the head 1 side to the tip 2 side, and the short-diameter protrusion 4 gradually decreases in its radial length toward the tip. There are four locations arranged alternately so that the length of the bridge becomes longer.

Furthermore, to explain the changes in the distances A and B from the trunk axis 5 to the major diameter protrusions 3 and the short diameter protrusions 4 at each location of the trunk in FIG. 1 using the end view of the trunk in FIG. Part 1
Each long diameter protrusion 3 formed on the side is shown in A-A end view, B
- The length A becomes shorter in the radial direction in the order of B-B end view and C-C end view, and the short-diameter protrusions 4 formed between each long-diameter protrusion 3 are A-A end view and B-B end view. , C-C
The radial length A increases in the order of the end views.

FIGS. 1 and 2 show an embodiment of the present invention, and as shown in FIG. The strips 8 are provided at three locations, and the short diameter protrusions 9 are provided at three locations alternately so that the length in the radial direction gradually increases toward the tip.

To explain this using the end view of the body in FIG. 4, the changes in the distances C and E from the body axis 10 to the major diameter protrusions 8 and the minor diameter protrusions 9 at each location of the body in FIG. 3 are explained. Each long diameter protrusion 8 formed on the 6 side is shown in the D-D end view, E-E
The radial length U decreases in the order of the end view, and the short diameter protrusion 9 formed between each major diameter protrusion 8 decreases in radial length in the order of the D-D end view and the E-E end view. It is getting longer so that the ``e'' is raised. Each of these longer diameter protrusions 8 and shorter diameter protrusions 9 may be provided in a spiral shape inclined with respect to the trunk axis 10.

Next, as shown in FIGS. 5 and 6, the end face of the body tip side 11 is formed by a circle 13, and the end face of the body head side 12 is formed by a square 14. A long-diameter protrusion 15 whose radial length gradually decreases from the head 12 side to the tip 11 side is provided, and a short-diameter protrusion 16 whose radial length gradually decreases toward the tip. They are arranged alternately to make them longer.

Each of the long diameter protrusions 15 and the short diameter protrusions 16 may be provided in a spiral shape inclined with respect to the trunk axis 17.

Furthermore, changes in the distances O and F from the trunk axis 17 to the major diameter protrusion 15 and the short diameter protrusion 16 at each location of the trunk in FIG. 5 will be explained using the trunk end view in FIG. 6.
Each long diameter protrusion 15 formed on the head 12 side is F-F.
The radial length O becomes shorter in the end view and the G-G end view, and each short diameter protrusion 16 formed between the long diameter protrusions 15 becomes shorter in the F-F end view and the G-G end view. The length in the radial direction increases in turn.

Further, as shown in FIGS. 7 and 8, a long diameter protrusion 20 is provided whose radial length gradually decreases from the head 18 side to the tip 19 side, and from the head 18 side to the tip 19 side. Short diameter protrusions 21 whose radial length gradually increases as the length reaches 1 are provided alternately. Each of the long diameter protrusions 20 and the short diameter protrusions 21 may be provided in an inclined spiral shape with respect to the trunk axis 22.

Furthermore, using the end view of the body part in FIG. 8, the changes in the distances K and K from the body axis 22 to the major diameter protrusion 20 and the minor diameter protrusion 21 in each part of the body part in FIG. 7 will be explained.
The length of the long diameter protrusions 20 formed on the head 18 side becomes shorter in the radial direction in the order of H-H end view and I-I end view, and the short diameter protrusions 20 formed between each of the long diameter protrusions 20 become shorter. 21 becomes longer in the radial direction in the order of H-H end view and I-I end view.

[Effect] When the nail of this invention is driven into a steel plate with a nail gun,
The contact area between the steel plate and the nail body that has been pushed apart by the nail body returns to its original state due to the restoring elasticity of the steel plate, so the contact surface between the nail body and the steel plate is firmly fixed after the nail is driven. conclude. Even if an external pulling force exceeding the restoring elastic force of the steel plate is applied, and the restoring elastic force does not act on the part of the steel plate in contact with the nail body, the short-diameter protrusion on the nail head side will move from the nail head side to the tip. Since the length in the radial direction gradually increases toward Since the length in the radial direction gradually decreases toward the tip end of the nail, it is possible to prevent extra nails from entering.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the first embodiment, Fig. 2 is a sectional view of the trunk of the first embodiment, Fig. 3 is a front view showing the second embodiment, and Fig. 4 is a front view showing the second embodiment. FIG. 5 is a front view showing the third embodiment; FIG.
The figure is a sectional view of the body of the third embodiment, FIG. 7 is a front view of the fourth embodiment, and FIG. 8 is a sectional view of the body of the fourth embodiment.

Claims (1)

[Claims for Utility Model Registration] (1) The body has a head at one end and a nail tip at the other end;
In nails in which long diameter protrusions and short diameter protrusions are arranged alternately in the radial direction from the central axis of the body, the long diameter protrusions gradually become shorter in the radial direction from the head side to the tip side. A nail characterized by a short diameter protrusion that gradually increases in length in the radial direction from the head side to the tip side. (2) The long-diameter protrusion on the head side is formed into a chevron-shaped protrusion, and the short-diameter protrusion on the same head side is formed into a substantially flat surface, and the chevron-shaped protrusion toward the tip side. The radial length of the strip gradually decreases from the central axis, and it is formed into a substantially flat surface on the tip side, and the flat surface on the head side gradually decreases in radial length from the central axis. The nail according to item 1 of the claim for utility model registration, characterized in that a chevron-shaped protrusion is formed so as to become longer and bulge. (3) The long-diameter protrusion on the head side is formed into a chevron-shaped protrusion, and the short-diameter protrusion on the same head side is formed into a substantially flat surface, and the chevron-shaped protrusion toward the tip side. The radial length of the strip gradually decreases from the central axis, and it becomes part of a cylinder at the tip, and the flat surface on the head side gradually decreases the radial length from the central axis. The nail according to claim 1 of the utility model registration claim, characterized in that the nail becomes elongated and becomes a cylindrical part on the tip side so as to bulge. (4) The head side and tip side have an elliptical cross section, the long diameter protrusion on the head side is the large diameter part of the ellipse, the short diameter protrusion on the head side is the small diameter part of the ellipse, and the large diameter part is the tip. The length in the radial direction from the central axis gradually decreases toward the side, forming the small diameter part of the ellipse on the tip side, and the small diameter part on the head side gradually increases in length in the radial direction from the central axis toward the tip. The nail according to claim 1 of the utility model registration claim, characterized in that the nail has an elliptical large diameter portion on the tip side so as to swell.