Nail Shooting

Abstract

The present invention discloses a nail, which is made of metal and comprises a screw with external threads and a nail head, wherein the nail head is provided with a rod, a fixing part and an insertion part in order from top to bottom, wherein the diameter of the rod is smaller than the diameter of the screw, and the diameter of the insertion part is smaller than the diameter of the fixing part; the insertion part has a bottom surface, and the diameter of the hole is larger than the diameter of the bottom surface and smaller than the diameter of the lower end surface of the fixing part; the nail head is driven into the hole of the metal base along a straight line, and the fixing part is welded to the inner wall of the hole. The nail of the present invention has a good fixing effect.

Description

Technical Field

[0001] The invention relates to a device for installing and fixing an object, in particular to a nailing device. Background Art

[0002] A nail generally consists of a nail head and a screw. The nail head can be driven into a base such as concrete, rock, or metal by a power source such as gunpowder or gas, and the screw is used for installation and fixation. This type of nail can be divided into a pointed nail and a flat nail according to the shape of the nail head. For example, Chinese invention patent CN110506166B discloses a flat nail. This flat nail has an inclined nail head. During installation, a blind hole smaller than the diameter of the end face of the nail head is drilled on a metal base, and then the nail is driven vertically and at high speed into the blind hole using a power source such as gunpowder or gas. During the driving process, the nail head and the blind hole rub at high speed, thereby firmly welding the nail head into the blind hole. However, the nail of CN110506166B has the following problems: Since the end face diameter of the nail is larger than the blind hole diameter, it is difficult for the nail head to align with the blind hole during installation, and it is difficult for the nail head and the blind hole to maintain a vertical state, which makes it easy to deviate or tilt during installation, so that the installation and fixation of the nail cannot be completed. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the above-mentioned defects in the prior art, and the present invention provides a nail.

[0004] A nail, made of metal, comprising a screw with external threads and a nail head, wherein the nail head is provided with a rod, a fixing part and an insertion part in order from top to bottom, wherein the diameter of the rod is smaller than the diameter of the screw; the insertion part has a bottom surface, and the diameter of the hole is larger than the diameter of the bottom surface and smaller than the diameter of the lower end surface of the fixing part. The nail head is driven into the hole of a metal base along a straight line, and the fixing part is welded to the inner wall of the hole.

[0005] Optionally, the diameter of the rod portion is larger than the diameter of the fixing portion, and the diameter of the insertion portion is smaller than the diameter of the fixing portion; the rod portion and the connecting screw are located outside the hole, and the fixing portion and the insertion portion are located inside the hole; the length of the insertion portion is 0.3-1mm; the rod portion, the fixing portion and the insertion portion all have a cylindrical structure; the deviation between the diameter of the bottom surface of the insertion portion and the diameter of the hole is 0.05-0.1mm; the hole is a through hole located on the base; the insertion portion is made of metal or non-metallic corrosion-resistant material; an inverted truncated cone-shaped transition section is provided between the insertion portion and the fixing portion, and the top surface diameter of the transition section is equal to the top surface diameter of the insertion portion.

[0006] Furthermore, the fixing portion is in the shape of an inverted truncated cone as a whole, the inserting portion is connected to the lower end surface of the truncated cone, the upper end surface of the truncated cone is connected to the rod portion, the diameter of the upper end surface is equal to the diameter of the rod portion, and the diameter of the lower end surface is equal to the diameter of the top surface of the inserting portion; the angle between the side surface of the fixing portion and its axis is 1 ° ~5 ° ; The angle is 3 ° .

[0007] In general, compared with the prior art, the above technical scheme conceived by the present invention can achieve the following beneficial effects: during the installation process, due to the existence of the insertion part, the nail can be stably maintained in the hole and be perpendicular to the hole, which can effectively prevent the occurrence of deviation, so that the nail can be firmly welded to the base. At the same time, since the insertion part mainly plays a guiding and positioning role, it does not need to withstand a large pulling force, so it can be made of cheaper materials, which is conducive to reducing production costs. In the present invention, the fixing part will be covered by the insertion part, and the fixing part will not be exposed to the corrosive environment, which greatly improves the service life of the nail. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic diagram of the structure of the nail in Embodiment 1 of the present invention;

[0009] Figure 2 This is a schematic diagram of the structure of the nail in Embodiment 2 of the present invention;

[0010] Figure 3A This is a schematic diagram of the structure of the nail in Embodiment 3 of the present invention;

[0011] Figure 3B It is a partial enlarged view of the nail shooting in Example 3 of the present invention. DETAILED DESCRIPTION

[0012] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, so that the above-mentioned and other objects, features and advantages of the present invention will be clearer. The same reference numerals in all the drawings indicate the same parts. The drawings are not deliberately drawn to scale, and the focus is on illustrating the subject matter of the present invention.

[0013] Example 1

[0014] First, the structure of the nail in the present invention is introduced. Figure 1 This nail is made of metal and mainly includes a screw rod 3 with an external thread 4 and a nail head. The length of the screw rod 3 is usually 13-15 mm, and the length of the nail head is usually 6-8 mm.

[0015] The nail head is provided with a rod 5, a fixing part 2 and an inserting part 1 in order from top to bottom. The diameter of the rod 5 is smaller than the diameter of the screw 3, and the diameter of the inserting part 1 is smaller than the diameter of the fixing part 2. Preferably, the diameter of the rod 5 is larger than the diameter of the fixing part 2.

[0016] In this embodiment, the rod 5, the fixing part 2 and the inserting part 1 all have a cylindrical structure. The rod 5 is used to connect the screw rod 3 and the fixing part 2, and a washer can be sleeved on the rod 5. Figure 1 A hole 7 is opened on the metal base 6 , and the inserting part 1 has a bottom surface 8 . The diameter of the hole 7 is larger than the diameter of the bottom surface 8 but smaller than the diameter of the lower end surface of the fixing part 2 .

[0017] During installation, the inserting part 1 can be inserted into the hole 7. Due to the existence of the inserting part 1, the nail can be stably kept in the hole 7 and in a vertical state with the hole 7. Then, driven by, for example, gunpowder, the nail is driven into the hole 7 at high speed. In this process, since the diameter of the fixing part 2 is larger than the diameter of the hole 7, the fixing part 2 will cut the hole wall of the hole 7, thereby exposing the bright metal layer of the base 6. During high-speed friction, a large amount of heat is generated between the outer wall of the fixing part 2 and the metal layer, thereby firmly welding the base (the inner wall of the hole 7) and the nail together. The fixing part 2 is completely driven into the hole 7, while the rod 5 and the connecting screw 3 are located outside the hole 7. The washer on the rod 5 can prevent, for example, water vapor from entering the hole 7, thereby preventing the nail from being corroded.

[0018] It should be noted that the length of the insertion portion 1 should not be too large, as a too large length will reduce the length of the fixing portion 2, which will reduce the welding area between the fixing portion 2 and the base 6, resulting in a reduction in the fixing strength of the nail. On the other hand, the length of the insertion portion 1 should not be too small, as a too small length will make it difficult for the insertion portion 1 to be stably inserted into the hole 7, which is not conducive to rapid installation and will reduce construction efficiency. This length is preferably 0.3-1 mm.

[0019] Furthermore, regarding the diameter of the bottom surface 8, it should ensure that it can be inserted into the hole 7 relatively easily, and at the same time ensure that there is no significant shaking in the hole 7. If the diameter of the bottom surface 8 is too large, it is not easy to insert. If the diameter is too small, the insertion part 1 will shake in the hole 7. This shaking will make it difficult to ensure that the nail enters the hole 7 in a vertical state during the installation process, resulting in deviation. Therefore, the deviation between the diameter of the bottom surface 8 of the insertion part 1 and the diameter of the hole 7 is preferably 0.05-0.1mm.

[0020] In particular, in the present invention, the hole 7 is preferably a through hole on the base 6. In CN110506166B, the hole for driving the nail is a blind hole. In practice, it is found that this blind hole has the following problems: when the nail is driven in at high speed, the air in the blind hole is difficult to be discharged, so the nail will compress this part of the air into a very small range at the bottom of the blind hole. This causes that on the one hand, during the nail driving process, the air needs to be compressed, which requires an increase in the driving force, such as the need to increase the charge of gunpowder, thereby placing higher requirements on the installation tool. On the other hand, this part of the compressed air will produce very strong pressure, which will produce a reaction force on the nail, reducing the fixing strength of the nail. In this regard, the present invention changes the hole into a through hole, so that during the installation process, the air will be discharged from the bottom of the through hole, so that not only can a smaller driving force be used to complete the installation, but also the fixing strength can be improved.

[0021] The insertion part 1 can be made of corrosion-resistant materials such as metal or non-metal, which is particularly advantageous when the hole 7 is a through hole. Compared with the fixing part 2, since the insertion part 1 mainly plays a guiding and positioning role, it does not need to withstand a large pulling force, so it can be made of cheaper materials, which is conducive to reducing production costs. In CN110506166B, when the hole 7 is a through hole, the fixing part will be directly exposed to a corrosive environment, such as seawater, which will reduce the service life of the nail. In the present invention, the fixing part 2 will be covered by the insertion part 1, and the fixing part 2 will not be exposed to a corrosive environment, which greatly improves the service life of the nail.

[0022] Example 2

[0023] This embodiment mainly introduces the differences from Embodiment 1, and the similarities are not repeated here. Figure 2 As shown, the difference between this embodiment and embodiment 1 mainly lies in the improvement of the nail head structure, especially the improvement of the insertion part 1.

[0024] like Figure 2 As shown, the insertion portion 1 of the nail head can be provided with a chamfer 9, which makes it easier to insert the insertion portion 1 into the hole 7. It should be noted that when the chamfer 9 is provided, the bottom surface 8 of the insertion portion 1 is the upper edge of the chamfer 9.

[0025] Furthermore, an inverted truncated cone-shaped transition section 11 is provided between the insertion portion 1 and the fixing portion 2, and the top surface 10 of the truncated cone is connected to the insertion portion 1, and its diameter is equal to the top surface diameter of the insertion portion 1. Due to the presence of the truncated cone of the transition section 11, the truncated cone has an inclined side surface, so when the nail is driven into the hole 7, compared with the embodiment 1, this inclined side surface can further guide the nail, guide the fixing portion 2 into the hole 7, and also reduce the driving force required for installation.

[0026] Example 3

[0027] See also Figure 3A and Figure 3B In this embodiment, the fixing portion 2 is in the shape of an inverted truncated cone as a whole, the insertion portion 1 is connected to the lower end face 12 of the truncated cone, the upper end face 13 of the truncated cone is connected to the rod portion 5, the diameter of the upper end face 13 is equal to the diameter of the rod portion 5, and the diameter of the lower end face 12 is equal to the diameter of the top face of the insertion portion 1. Similar to Example 2, a transition section 11 may also be provided between the insertion portion 1 and the fixing portion 2, and at the same time, a chamfer 9 is provided on the bottom face of the insertion portion 1. When the transition section 11 is provided, the bottom face diameter of the transition section 11 is the same as the diameter of the lower end face 12 of the truncated cone, the diameter of the top face 10 of the transition section 11 is equal to the diameter of the top face of the insertion portion 1, the diameter of the lower end face 12 is larger than the diameter of the hole 7, and the angle between the side face of the fixing portion 2 and its axis may be 1 ° ~5 ° , within this range, it is beneficial for the nail to quickly enter the hole 7, thereby improving the welding effect and pulling force, but too large an angle will reduce the pressure between the fixing part 2 and the inner wall of the hole 7, which is not conducive to frictional heat generation and will reduce the welding effect and pulling force. This angle is preferably 3 ° As shown in Table 1, through experiments, it can be found that in 3 ° The nailing will produce the greatest pull-out force.

[0028] Table 1

[0029]

[0030]

[0031] Many specific details are described in the above description to facilitate a full understanding of the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited to the specific implementation disclosed above. At the same time, any person familiar with the art can make many possible changes and modifications to the technical solution of the present invention using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A nail, made of metal, comprising a screw with external threads and a nail head, characterized in that: The nail head is provided with a rod portion, a fixing portion and an inserting portion in order from top to bottom, the diameter of the rod portion is smaller than the diameter of the screw rod, and the diameter of the inserting portion is smaller than the diameter of the fixing portion; The nail head is driven into the hole of the metal base along a straight line, and the fixing part is welded to the inner wall of the hole; The inserting portion has a bottom surface, the diameter of the hole is larger than the diameter of the bottom surface and smaller than the diameter of the lower end surface of the fixing portion; the inserting portion is provided with a chamfer, and the bottom surface of the inserting portion is the upper edge of the chamfer; The inserting part has a guiding and positioning function, can be inserted into the hole, and enables the nail to be stably held in the hole and be in a vertical state with respect to the hole; the inserting part is made of metal or non-metal corrosion-resistant material.

2. The nail according to claim 1, characterized in that: The diameter of the rod portion is greater than the diameter of the fixing portion.

3. The nail according to claim 1, characterized in that: The rod portion and the screw rod are located outside the hole, and the fixing portion and the inserting portion are located inside the hole.

4. The nail according to claim 1, characterized in that: The length of the insertion portion is 0.3-1 mm.

5. The nail according to claim 1, characterized in that: The rod portion, the fixing portion and the inserting portion all have a cylindrical structure.

6. The nail according to claim 1, characterized in that: The deviation between the diameter of the bottom surface of the inserting part and the diameter of the hole is 0.05-0.1 mm.

7. The nail according to claim 1, characterized in that: The hole is a through hole located on the base.

8. The nail according to claim 1, characterized in that: An inverted truncated cone-shaped transition section is provided between the inserting portion and the fixing portion, and a top surface diameter of the transition section is equal to a top surface diameter of the inserting portion.

9. The nail according to any one of claims 1 to 7, characterized in that: The fixing portion is in the shape of an inverted truncated cone as a whole, the insertion portion is connected to the lower end surface of the truncated cone, the upper end surface of the truncated cone is connected to the rod portion, the diameter of the upper end surface is equal to the diameter of the rod portion, and the diameter of the lower end surface is equal to the top surface diameter of the insertion portion.

10. The nail according to claim 9, characterized in that: The angle between the side surface of the fixing portion and its axis is 1° to 5°.

11. The nail according to claim 10, characterized in that: The angle is 3°.

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