JP2006289372A - Production method of nail - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase drawing resistance without entailing a high production cost while averting black discoloration of timber. <P>SOLUTION: In manufacturing a nail suitable for fixing the timber, a surface layer (10B) of a metallic material more likely to generate rust than a stainless metallic material is formed by plating on the surface of a long-sized wire (101) made of the stainless metallic material (10A). The long-sized wire is cut to a nail raw profile (11) of a prescribed length and by working a nail head (41) to exposed one end of the stainless metallic material of the nail raw profile, the nail (40) of which the head top face is exposed with the stainless metallic material and the rear surface of the head and the front surface of the shank are coated with surface layers of the metallic materials liable to generate rust is produced. <P>COPYRIGHT: (C)2007,JPO&INPIT

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 thought to be due to 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 foamed concrete nails and inorganic board nails by electroplating, chemical plating, immersion plating, etc. to increase the resistance to pulling out the nails (Patent Documents) 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 of manufacturing a nail according to the present invention is a metal that is more susceptible to wrinkles than a non-sterile metal material on the surface of a long metal wire made of a non-sterile metal material when manufacturing a nail suitable for fixing wood. The surface layer of the material is formed by plating, the long wire is cut into a predetermined length of nail shape, and the nail head is processed at one end of the exposed nail metal material of the nail shape In this way, a nail is produced in which a sterilized metal material is exposed on the top surface of the head and the back surface of the head and the body surface are covered with a surface layer of a metal material that is prone to wrinkles. To do.

  One of the features of the present invention is that a long wire made of a non-sterile metal material having a surface layer of a metal material that is prone to wrinkles on the surface is used, and the long wire is cut into a nail shape material of a predetermined length. By processing the nail head at one end of the exposed nail metal material of the nail shape material, the nail metal material is exposed at the top of the head, and the nail body is a metal material that is prone to wrinkles It is in the point which made it coat | cover with the surface layer of.

  Thereby, since the sterilized metal material is exposed on the top surface of the nail head, wrinkles hardly occur even if the nail head gets wet in the rain, 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, the physical properties of the wood change over time, and even if so-called wood thinning occurs, the nail does not come off easily.

  Furthermore, using a long wire made of a sterile metal material with a surface layer formed, it was cut in the same manner as in 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 non-metallic metal material may be any material that does not easily generate soot. For example, stainless steel can be used. Moreover, the metal material which is easy to generate | occur | produce a flaw should just be a material which is easy to generate | occur | produce a flaw compared with a non-sterile metal material, for example, when a non-metallic metal material is stainless steel, carbon steel etc. can be used.

  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. The sterile metal material is exposed at the tip of the nail. However, since the pulling resistance is increased by the nail of the nail body, there is no problem even if the sterile metal material is exposed at the tip of the nail.

  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.

  When a nail is manufactured by the method of this example, a long metal wire 10 made of a ferrous metal material such as stainless steel is pulled out of the coil, and the surface thereof is plated using a metal material that easily generates wrinkles such as carbon steel. The surface layer 10B is formed by dipping and wound into a coil.

  The coil of the long wire 10 obtained in this way is set in a 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 molding 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.

  Accordingly, 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.

  In the above example, stainless steel and carbon steel are used. However, the present invention is not limited to this, and other sterilized metal materials and other metal materials in which soot is easily generated can be used. Further, when it is difficult to completely expose the sterile metal material when the long wire 10 is cut, a cutting process may be added to completely expose the sterile metal material on the end face.

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.

Explanation of symbols

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 a metal material that is more likely to wrinkle than a non-metallic metal material is formed by plating on the surface of a long metal wire made of a non-metallic metal material,
Cutting the long wire into a nail shape of a predetermined length,
By processing a nail head at one end of the nail shape member where the non-metallic metal material is exposed, the non-metallic metal material is exposed on the top surface of the head, and the back surface of the head and the body surface of the nail material are wrinkled. A method for manufacturing a nail, characterized in that a nail coated with a surface layer of a metal material that is easily generated is manufactured. 2. The nail according to claim 1, wherein the other end portion of the nail material which is exposed of the sterile metal material is processed into a sharp shape so that the sterile metal material is exposed at the tip of the nail. Production method.

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