JP4722529B2 - Manufacturing method of nails - Google Patents

Description

  The present invention relates to a method for manufacturing a nail, and more particularly, to a method for manufacturing a nail that can increase pull-out resistance without incurring high costs while avoiding black discoloration of wood.

  For example, when the wood is fixed by driving a nail, it is known that the head of the nail gets wet with rain or the like, and the wood around the head of the nail turns black after 2 to 3 days. This is considered to be caused by the occurrence of wrinkles at the nail head and the reaction between iron ions dissolved from the wrinkles and organic substances such as tannins in wood.

  Therefore, a nail manufactured using stainless steel, a nail plated with a corrosion-resistant material as a whole (Patent Document 1), or a nail in which a stainless steel head and a body of another metal material are solid-phase bonded. (Patent Document 2) and the like have been proposed.

  However, with stainless steel nails and plated nails, the physical properties of the wood have changed over time, and so-called lumber of the wood will easily come off. In addition, nails produced by solid-phase bonding incur a high manufacturing cost and are difficult to adopt for general purpose nails.

  On the other hand, it has been proposed to form a surface layer with a high coefficient of friction on the surface of foam concrete nails and inorganic board nails by electroplating, chemical plating, immersion plating, etc. to increase the resistance to pulling out the nails (Patent Literature). 3, Patent Document 4).

JP 2003-181582 A Japanese Utility Model Publication No. 05-34308 Japanese Patent Application Laid-Open No. 07-103215 Japanese Patent Publication No. 07-35803

  However, electroplating the surface layer on the finished nail or immersing the molten metal is very complicated and is not suitable for a wood nail that requires low cost.

  In view of such problems, an object of the present invention is to provide a method for manufacturing a nail that can increase the pulling resistance without incurring high cost while avoiding black discoloration of wood.

Therefore, the method for manufacturing a nail according to the present invention provides a surface layer of carbon steel that is more prone to wrinkles than stainless steel on the surface of a long stainless steel wire in manufacturing a nail suitable for fixing wood. Is formed by plating, the long wire is cut into a nail element of a predetermined length, and the nail head is processed at one end of the exposed stainless steel of the nail element. A feature of the present invention is to manufacture a nail in which stainless steel is exposed on the top surface and the back surface of the head and the surface of the body are covered with a surface layer of carbon steel that is liable to generate wrinkles.

One of the features of the present invention is to use a stainless steel long wire with a surface layer of a metal material that is prone to wrinkles on the surface, and cut the long wire into a nail element of a predetermined length. stainless steel is exposed to the head top surface by processing the exposed one end to the nail head of stainless steel profile, Kugido portion so as to cover the surface layer of the prone metal material rust It is in the point made.

Thereby, since the stainless steel is exposed on the top surface of the nail head, even if the nail head gets wet in the rain, it is difficult for wrinkles to occur, and the occurrence of black discoloration of the wood can be minimized.

  In addition, the surface of the nail body is formed with a surface layer made of a metal material that is prone to wrinkles, so when the nail body is driven into wood, the surface layer is wrinkled by moisture contained in the wood and pulled out. The resistance increases and the physical properties of the wood change over time, so that the nail does not come off easily even if the so-called wood thinning occurs.

In addition, using a stainless steel long wire with a surface layer, it was cut in the same way as the normal manufacturing process, and the head and tip of the nail were processed. No special manufacturing work is required, and there is no complication such as plating on the surface of the manufactured nail, resulting in no increase in manufacturing cost.

The stainless steel may be any material that does not easily generate wrinkles . Further, prone metal material rust may be a material rust is likely to occur as compared with stainless steel, in the case of stainless steel For example it is possible to use carbon steel or the like.

Further, the tip of the nail may be processed into a sharp shape by pressing or the like during or after the processing of the nail head, and when the long wire is cut, it is processed into a sharp shape using a cutting die. You can also. Although stainless steel is exposed at the tip of the nail, there is no inconvenience even if the stainless steel is exposed at the tip of the nail because the pull-out resistance increases due to the heel of the nail body.

  The plating method is not particularly limited, and electroplating, chemical plating, molten metal immersion plating, and the like can be employed.

  Hereinafter, the present invention will be described in detail based on specific examples shown in the drawings. 1 to 3 show a preferred embodiment of a method for manufacturing a nail according to the present invention. The apparatus used in this example is composed of a cutting machine 20 and a molding machine 30 as shown in FIG.

Surface When producing nails, stainless steel long wire 10 if example embodiment on the surface are drawn out from the coil by the method of the present embodiment, prone metal material rust, for example, by plating or dipping using a carbon steel Layer 10B is formed and wound into a coil.

  The coil of the long wire 10 thus obtained is set in the cutting machine 20, the long wire 10 is pulled out from the coil and sandwiched by the holder 21, and cut into the length of the nail shape material 11 by the cutting blade 22. At this time, as shown in FIGS. 2A and 2B, the stainless steel 10 </ b> A is exposed on the end surface of the cut nail-shaped member 11 and the remaining end surface of the long wire 10.

  When the nail profile 11 is thus obtained, the holder 21 of the cutting machine 20 is opened, the nail profile 11 is taken out, sent to the molding machine 30, and the holder as shown in FIG. 2 (c). Then, one end of the nail shape member 11 is processed into the shape of a nail head with a forming die 22 as shown in FIG.

  At this time, since the stainless steel 10A is exposed at the end face on the one end side of the nail shape member 11, the stainless steel 10A is exposed at the top surface of the head 41 of the nail 40, and the head of the nail 40 The back surface of 41 and the surface of the body portion 42 are covered with a surface layer 10B of carbon steel.

  Further, when the other end portion of the nail shape member 11 is processed into a sharp shape by a molding press or the like, the stainless steel 10A is exposed on the other end surface of the nail shape material 11, so that the tip end of the nail 40 is sharp. In the portion 43, the stainless steel 10A is exposed.

  Therefore, when the nail 40 of this example is driven and the wood is fixed, the stainless steel 10A on the top surface of the head 41 of the nail 40 is exposed on the surface of the wood, so that even if the head 41 of the nail 40 gets wet with water. It is difficult to generate wrinkles, and the occurrence of black discoloration of wood can be minimized.

  Further, since the surface layer 10B of carbon steel is formed on the surface of the body portion 42 of the nail 40, wrinkles are generated in the surface layer 10B due to moisture contained in the wood, and the pulling resistance of the nail 40 is increased. Even if so-called thinness of wood occurs, the nail 40 becomes difficult to come off.

  Furthermore, since the long wire 10 having a surface layer formed thereon is cut in the same manner as in a normal manufacturing process and the head 41 and the tip of the nail 40 are processed, solid phase bonding or the like is performed. No special manufacturing work is required, and there is no complication such as plating or dipping on the surface of the manufactured nail, resulting in no high manufacturing cost.

Na us, may be fully exposing the stainless steel at the end face by adding a cutting process when the stainless steel is hard to completely exposed at the time of cutting the long wire 10.

It is a figure which shows the relationship between the cutting machine and molding machine which are used in preferable embodiment of the manufacturing method of the nail which concerns on this invention. It is a figure which shows the manufacturing process in the said embodiment typically. It is a figure which shows the nail obtained in the said embodiment.

DESCRIPTION OF SYMBOLS 10 Long wire 10A Stainless steel 10B Surface layer 20 Cutting machine 21 Holder 22 Cutting blade 30 Molding machine 31 Holder 32 Forming die 40 Nail 41 Head 42 Body 43 Sharp edge part

Claims (2)

In producing nails suitable for fixing wood,
A surface layer of carbon steel , which is more susceptible to wrinkling than stainless steel , is formed on the surface of a long stainless steel wire by plating.
Cutting the long wire into a nail shape of a predetermined length;
By processing the nail head at one end exposed stainless steel nail formed and fabricated material, prone carbon in stainless steel are exposed on the head top face and the head rear surface and the barrel surface rust A method for producing a nail, characterized in that a nail coated with a steel surface layer is produced. 2. The method of manufacturing a nail according to claim 1, wherein the other end portion of the nail shape member exposed to stainless steel is processed into a sharp shape so that the stainless steel is exposed at the tip end portion of the nail.

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