JPH10328776A - Production of connected nail - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a connected nails with two processes of a raw material forming process to cut a band like metal and a connected nail forming process with die forging and to improve the productivity. SOLUTION: This production has a raw material forming process S1 to form a connected nail raw material having nail forming shaft like parts 5 arranging like a strip of paper and being connected with each other through a connecting part 3 between cut lines 4, 4 by cutting a band like metal in the longitudinal direction at a definite interval and remaining the partial connecting part 3, and a connected nail forming process S2 to form the connected nails 10 with a nail like body 7 arranging through a joining part 9 by forming, with the die forging, the shaft like part 5 of the connected nail raw material into a nail like body 7 and forming the connecting part 3 into a thinner wall joining part 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to two processes, namely, a material forming step for cutting a strip-shaped metal and a connecting nail forming step by die forging.
The present invention relates to a method for manufacturing a connecting nail that can form a connecting nail by a process and can improve productivity.

[0002]

2. Description of the Related Art A slate nail, a concrete nail, a round nail, a reverse nail, a pin panel, a dowel, a finishing nail, etc., various nails, a connecting nail in which nails such as screws are arranged and integrated are conventionally adjacent nails. It is manufactured through a connecting step of connecting the shaped bodies with a connecting material such as a plastic material using an adhesive.

[0003]

However, since the connecting step uses a large number of connecting members, it requires a great deal of labor and significantly reduces the productivity.

[0004] In addition, a relatively large amount of scrap is generated when the nail-shaped body manufactured individually is formed from the material, and the connecting member and the like are generally excessively prepared. Occurs.

[0005] The present invention basically comprises a material forming step of cutting a strip-shaped metal to form a connecting nail material and a connecting nail forming step of forming a connecting nail by die forging. It is an object of the present invention to provide a method for manufacturing a connecting nail, which can be made unnecessary, increase productivity and eliminate generation of scrap.

[0006]

According to the present invention, in order to achieve the above object, according to the first aspect of the present invention, a strip-shaped metal is cut at regular intervals in a longitudinal direction and leaving some connecting portions. By doing, a material forming step of forming a connecting nail material having a nail-forming shaft-shaped portion connected by the connecting portion and aligned in a strip shape between the cuts, and the forging of the connecting nail material by die forging. Forming the connecting portion into a nail-like body and forming the connecting portion into a joint having a reduced thickness, thereby forming a connecting nail on which the nail-like body is lined up through the connecting portion. It is a manufacturing method of a connection nail.

Further, according to the invention of claim 2, the strip-shaped metal is
A pair of comb-tooth-shaped connecting nail materials having a shaft-shaped portion for forming nails that alternately protrude from both connecting portions on both sides extending at the side edges of the strip-shaped metal and are cut in a comb shape facing the length direction, and are arranged in a strip shape. By forming the material forming step and die forging, by forming the shaft-like portion of the connecting nail material into a nail-like body and forming at least a part of the connecting portion into a thinned joint portion,
A connecting nail forming step of forming a connecting nail in which the nail-like bodies are arranged through the joint portion.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 to 8, the method for manufacturing a connecting nail according to the present invention is characterized in that the strip-shaped metal 2 is cut at regular intervals in the length direction while leaving a part of the connecting portion 3, so that the cut between the cuts 4 and 4 is formed. A material forming step S1 for forming a connection nail material 6 having a nail-forming shaft portion 5 connected by the connection portion 3 and arranged in a strip shape, and the shaft portion 5 of the connection nail material 6 is formed by die forging. The connecting part 3 is formed into a nail 7 and
Is formed into a thinned joint portion 9 to form a connecting nail 10 in which the nail-like members 7 are arranged in a line via the joint portion 9.

[0009] As shown in FIG.
It is formed by molding iron, brass, copper, or the like into, for example, a rectangular plate shape, and the material, thickness, length, and other dimensions are arbitrarily determined as desired.

In the material forming step S1, the strip-shaped metal 2 is
A pre-process S1A for cutting at a certain interval in the length direction and leaving a part of the connecting portion 3, and between the cuts 4 and 4, the connecting portion 3 is connected by a connecting intermediate portion 22 in which the connecting portion 3 is thinned, and has a strip shape. A post-process S1B for forming a connecting nail material 6 having a shaft-shaped portion 5 for forming nails in a line.

The pre-process S1A is performed as shown in FIG.
For example, the band-shaped metal 2 is formed by stamping using a mold.
By cutting and restoring the connection part 3,
As shown in FIG. 2, the cut 4A includes a cut 4A extending from one side edge and a cut 4B extending from the other side edge.
A front material 23 having the connecting portion 3 formed between A and 4B is manufactured.

In the post-process S1B, the connecting portions 3 and both sides thereof are compressed and pressed one by one by pressing surfaces 24A, 24A of the dies 24, 24 illustrated in FIG.
As shown in FIG. 7, the connection nail material 6 is manufactured by extending and forming the connection intermediate portion 22. At this time, the material forming the connecting intermediate portion 22 is brought from the recess 26 formed in the shaft portion 5 by the compression by the mold 24.

In the connecting nail forming step S2, the shaft-like portion 5 of the connecting nail material 6 is formed into a nail-like body 7 by die forging, and the connecting portion 3 is thinned. By molding the part 22 into the joint part 9 which is further thinned,
As shown in FIG. 8, the nail 7
Is manufactured.

The nail 7 has a head 7A, a cylindrical nail shaft 7B and a sharp tip 7C. However, since it is manufactured by die forging, it cannot be formed by rolling or the like. This is advantageous for manufacturing a non-circular (eg, octagonal) cross section, with a stopper, etc.

In the material forming step S1, the connecting portion 3 may be formed as a connecting intermediate portion having the same thickness as the joint portion 9.

The mold used for die forging is compressed, while being locally heated, if necessary, is processed while being softened by heat treatment such as annealing, or is subjected to hot working, which is performed by heating. When a soft material such as brass is used for the band-shaped metal 2, cold working is also possible.

As shown in FIG. 9, a projection 2 having a V-shaped cross section, for example, and having a recess 31 formed in a part of the projection end.
By compressing the band-shaped metal 2 by the pressing dies 30, 30 in which the 9 are arranged, the shaft-shaped portions 5 are arranged in a strip shape, and the shaft-shaped portions 5 are connected by the connecting portion 3 formed by the recess 31. It is possible to manufacture the connected nail material 6 (corresponding to the front material 23). The surface of the shaft 5 facing the pressing die 30 is formed with a raised portion 33 in which the material between the adjacent shafts 5, 5 swells. In addition, the adjacent shaft portions 5, 5 may be completely separated by the cuts 4, or may be connected by thin connecting portions.

FIGS. 10 to 14 show an embodiment of the second aspect of the present invention. In this example, the strip-shaped metal 2 is cut into a comb-like shape facing the longitudinal direction, and the nail-shaped shafts for nail formation alternately protrude from the connecting portions 3 on both sides extending at the side edges of the strip-shaped metal 2 and are arranged in a strip shape. A pair of comb-shaped connecting nail material 6 having a portion 5,
A material forming step S1 for forming the material 6 and a joint 9 in which the shaft-like portion 5 of the connecting nail material 6 is formed into a nail-like body 7 by die forging, and at least a part of the connecting portion 3 is thinned. And a connecting nail forming step S2 of forming connecting nails 10 on which the nail-shaped members 7 are arranged in a row via the joints 9.

FIGS. 10 and 11 show that the strip-shaped metal 2 is cut into a comb-like shape facing in the longitudinal direction by, for example, press punching, and alternately protrudes from the connecting portions 3 on both sides extending at the side edge of the strip-shaped metal 2. A material forming step S1 for forming a pair of comb-shaped connecting nail materials 6, 6 having a nail-shaped shaft portion 5 arranged in a strip shape is shown.

As shown in FIGS. 12 and 13, at least a part of the connecting part 3, in this example, a part between the adjacent shaft parts 5, 5 is compressed as shown by an arrow in FIG. The joint portion 9 having a small thickness is formed by being spread under pressure.

Further, as shown in FIG. 14, the shaft-like portion 5 of the connecting nail material 6 is formed into a nail-like body 7 by die forging, and the nail-like bodies 7 are arranged via the joint 9. Connecting nail 10
To form

As described above, in the present embodiment, the strip-shaped metal 2 has a pair of nail-shaped shaft-shaped portions 5 that protrude alternately from the connecting portions 3 on both sides extending at the side edges of the strip-shaped metal 2 and are arranged in a strip shape. Since it is divided into the comb-shaped connecting nail materials 6 and 6, the molding by die forging can be easily performed.

The joint 9 according to claims 1 and 2
It is preferable that the thickness T is 0.01 mm or more and 0.3 mm or less. If the thickness T is smaller than 0.01 mm,
When unnecessary, the joint portion 9 is easily broken, for example, and is easily cut, which tends to impair the quality of the connecting nail 10 and the convenience of management. Therefore, the thickness T is preferably 0.01 mm or more, more preferably 0.02 mm or more. Conversely, thickness T is 0.3mm
If it is larger than the above, the joint 9 may not be easily cut when necessary, so that the thickness T is 0.3 mm.
It is more preferably 0.1 mm or less.

[0024]

According to the method for manufacturing a connecting nail according to the first aspect of the present invention, the strip-like metal is cut while leaving a part of the connecting portion, so that the strip-shaped metal is connected between the cuts by the connecting portion. A material forming step of forming a connecting nail material having a shaft-shaped portion for forming nails arranged side by side, and the shaft-shaped portion of the connecting nail material was formed into a nail-like body by die forging, and the connecting portion was thinned. A connecting nail forming step of forming a connecting nail in which the nail-like bodies are lined up through the connecting portion by forming the connecting nail through the connecting portion, so that the connecting nail can be manufactured in two steps, and a plastic, an adhesive or the like is used. In addition to eliminating the need for a connecting step, productivity can be improved, almost all of the strip metal can be commercialized, and scrap can be eliminated to use the material effectively.

Further, since it is manufactured by die forging, it is advantageous for manufacturing a connecting nail having a non-circular cross section and a retaining member which cannot be formed by rolling or the like.

According to a second aspect of the present invention, there is provided a method of manufacturing a connecting nail according to the present invention, wherein the strip-shaped metal is cut into a comb shape, and the nails are alternately projected from the connecting portions on both sides extending at the side edges of the strip-shaped metal. A material forming step of forming a pair of comb-shaped connecting nail materials having a forming shaft-like portion, and forming the shaft-like portion of the connecting nail material into a nail-like body by die forging; By molding at least a part of the joint part thinned,
A connecting nail forming step of forming a connecting nail in which the nail-shaped bodies are lined up via the joint portion. Therefore, in addition to the effect of the first aspect of the present invention, the strip-shaped metal is divided into a pair of comb-tooth-shaped connecting nail materials having nail-forming shaft portions that alternately protrude from the connecting portions on both sides and are arranged in a strip shape. Therefore, the connecting nail including the joint portion and the nail-shaped body can be easily formed by die forging.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a band-shaped metal.

FIG. 2 is a perspective view showing a material forming step according to the first aspect of the present invention.

FIG. 3 is a perspective view showing a material forming step according to the first aspect of the present invention.

FIG. 4 is a partially enlarged perspective view of FIG.

FIG. 5 is a partial plan view thereof.

FIG. 6 is a partial perspective view illustrating an example of a method for manufacturing a cut and a connecting portion.

FIG. 7 is a perspective view illustrating a mold.

FIG. 8 is a perspective view illustrating a connecting nail.

FIG. 9 is a partial perspective view showing another method of manufacturing the connecting nail material.

FIG. 10 is a perspective view illustrating a material forming step according to the second aspect of the present invention.

FIG. 11 is a perspective view illustrating a material forming step according to the second aspect of the present invention.

FIG. 12 is a perspective view illustrating a connecting nail forming step of the invention of claim 2 of the present application;

FIG. 13 is a perspective view illustrating a connecting nail forming step according to the invention of claim 2 of the present application;

FIG. 14 is a perspective view illustrating a connecting nail.

[Explanation of symbols]

 Reference Signs List 2 band-shaped metal 3 connecting part 4 notch 5 shaft part 6 connecting nail material 7 nail-like body 9 joining part 10 connecting nail S1 material forming step S2 connecting nail forming step

Claims (2)

[Claims] 1. A nail for forming nails connected by said connecting portions and arranged in a strip shape between the cuts by cutting the strip-shaped metal at predetermined intervals in the length direction and leaving some connecting portions. A material forming step of forming a connecting nail material having a connecting portion, and forming the shaft-like portion of the connecting nail material into a nail-like body by die forging, and forming the connecting portion into a thinned joint portion. And a connecting nail forming step of forming a connecting nail in which the nail-like bodies are lined up through the joint portion. 2. A pair of strips having nail-shaped shafts which are cut in a comb-like shape facing the lengthwise direction, and which alternately protrude from connecting portions on both sides extending at side edges of the strip-shaped metal and are arranged in a strip shape. A material forming step for forming a comb-shaped connecting nail material of the following shape; and a joint in which the shaft-like portion of the connecting nail material is formed into a nail-like body by die forging and at least a part of the connecting portion is thinned. A connecting nail forming step of forming a connecting nail in which the nail-shaped bodies are lined up through the joint portion by forming the connecting nail into a connecting nail.