JP2620476B2 - nail - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nail used for gypsum board, cement, ALC plate (autoclaved light concrete plate) or the like having low holding power.

[0002]

2. Description of the Related Art Conventionally, nails cannot be used for objects having a weak holding force such as gypsum board. Therefore, brackets and the like have been attached using an adhesive or the like.

[0003]

However, fixing with an adhesive causes deterioration of the adhesive due to aging.
There is a problem of lack of reliability.

An object of the present invention is to provide a nail which can be firmly fixed to an object having a low holding force, such as a gypsum board, cement, or an ALC plate.

[0005]

According to a first aspect of the present invention, there is provided a nail having a flange having a notch opened to the side, and one end fixed to the flange. A central portion connected to one end is bent into a U-shape, and the other end movably penetrates the notch of the flange portion, and has a bar portion projecting a predetermined dimension on the opposite side to the central portion. It is characterized by.

For example, when fixing a roofing material to a gypsum board, the nail is placed on the roofing material, and the other end of the rod is hit with a hammer. Then, the U-shaped central portion of the rod penetrates the roof material and is further driven into the gypsum board. And when the flange part comes in contact with the roofing material,
Since one end of the bar is fixed to the flange, it is not further driven into the gypsum board. On the other hand, since the other end of the rod portion movably penetrates the notch of the flange portion, the other end is inserted into the flange portion and driven into the gypsum board. Therefore, the central portion of the rod portion is bent into, for example, an O shape or an L shape. Then, the nail is completely fixed in a state where the other end of the rod is completely driven into the flange.

[0007] As described above, since the tip of the rod portion driven into the gypsum board bulges in an O-shape or an L-shape, the nail has a strong holding force even if it has a weak holding force.
That is, a strong pull-out strength can be obtained.

According to the nail of the first aspect, since the rod portion is inserted through the notch opened to the side, the rod portion is inserted into the notch of the flange portion from the side when manufacturing the nail.
It can be bent and inserted into a letter shape. Therefore,
The nail according to claim 1 can be manufactured from a single wire, and can be mass-produced inexpensively and quickly. if,
If it is not a cutout open to the side but a circular hole,
Since the rod cannot be bent from the side and inserted into the circular hole, a nail cannot be manufactured from one wire.

A nail according to a second aspect of the present invention is the nail according to the first aspect, further comprising a bulge protruding into the notch so that the bar does not protrude to the side from the notch. And

According to this nail, the bulge prevents the bar from being bent laterally from the notch and coming off. Therefore, the nail can be driven in the correct form to perform its function.

According to a third aspect of the present invention, there is provided a nail having a flange portion, one end of which is fixed to the flange portion, a central portion connected to one end thereof is bent in a U-shape, and the other end is movable in the flange portion. A bar portion that penetrates and protrudes a predetermined dimension on the opposite side to the center portion, wherein the bar portion has a hard portion at one end and the other end, and a soft portion at the center. And

When the nail is driven, one end and the other end of the rod are hard parts, so they do not bend.
This nail can be reliably driven into a gypsum board or ALC plate. In particular, the other end of the rod protruding from the flange does not bend during driving. In addition, since the central portion of the rod portion is formed of a soft portion, it easily spreads in the lateral direction, and a large holding force is obtained.

The nail according to the fourth aspect of the present invention is characterized in that one end and the other end, which are the hard portions, are work-hardened. Therefore, the nail is easy to manufacture and inexpensive.

According to a fifth aspect of the present invention, in the nail of the third aspect, the one end and the other end are hardened by quenching, and the central portion is softened by tempering. I have.

Therefore, in the nail, the one end and the multi-end can be formed as extremely hard and strong hard parts,
In addition, the central portion can be easily made a soft portion.

[0016]

[0017]

[0018]

[0019]

[0020]

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

(First Embodiment) As shown in FIGS. 1A and 1B, this nail is made of metal such as iron or stainless steel, and has a round or oval flange portion 12 and a rod. A part 3 is provided. One end 3a of the rod 3 is
It is fixed to the flange portion 12, the central portion 3b is bent in a U-shape, and the other end 3c movably penetrates an obliquely U-shaped notch 12a provided on the flange portion 12 and opened to the side. To project a predetermined dimension. In addition, 3e is a small concave portion provided at a portion of the rod portion 3 to be bent, and the rod portion 3 is
This is for making it easy to bend in a letter shape.

As described above, the notch 12 opened to the side
By providing a, the other end 3c of the rod 3 is cut out 1
It can be bent from the side of 2a, and the workability when inserting the other end 3c of the rod portion 3 into the notch 12a is better than the case where one end of the rod portion is inserted into the circular through hole from the axial direction. ing. Also, as described above, the rod portion 3 is formed in the notch 12a.
Since the other end 3c can be inserted from the side, the nail can be manufactured from a single wire, and the nail can be mass-produced inexpensively and quickly.

The notch 12 of the flange portion 12
The parts 14, 14 on both sides of a are pressed by a punch press to form bulges 15, 15, and the rod 3c has a notch 12a.
From the side. Therefore, the nail can be driven in the correct form.

When this nail is driven into, for example, an ALC plate, the rod portion 3 has one end 3a fixed to the flange portion 12,
The other end 3c penetrates the notch 12a, and
Since it is driven into the ALC plate while being guided by a, a curved portion is formed in the central portion 3b of the rod portion 3,
For example, it expands in an O shape or an L shape. The driving of the nail is completed with the other end 3c of the rod portion 3 completely driven into the notch 12a of the flange portion 12.

As described above, since the nail is formed with a curved portion which expands in the lateral direction at the tip portion after the nailing is completed, a large pull-out resistance, that is, a fixing force is obtained even from an ALC plate having a weak holding force. Can be obtained.

(Second Embodiment) When the nail of the first embodiment is used, for example, for joining a roof tile and an ALC plate, a preliminary hole is already formed in the roof tile, so that the nail is not used. The tip may be just U-shaped, but in order to be able to drive nails into wood etc. smoothly,
The tip of the nail must be sharp and sharp.

FIG. 2 shows a second embodiment adapted to such a situation. This nail is obtained by sharply sharpening the point 3f of the bar portion of the first embodiment shown in FIG. By doing so, the nail can be smoothly driven into wood, an ALC plate, or the like, and a strong holding force can be obtained.

(Third Embodiment) The left side of FIGS. 3A, 3B and 3C shows a third embodiment.
The right side shows the first embodiment.

As shown on the left side of FIG. 3, this nail is different from the nail shown in the first embodiment in that a locking portion 110 which is locked to the flange portion 12 is provided at the other end 3c of the rod portion 3. Only the point is different from the nail shown in the first embodiment. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

When the nail is driven into the ALC plate, as shown on the left side of FIG. 3B, the central portion 3b is in the same position as the central portion 3b of the second embodiment shown on the right side of FIG. 3B. Similarly, it spreads in an O shape or an L shape.

However, as shown on the left side of FIG. 3B, when the flange portion 12 is pulled out by the pull-out test device 200 as shown by the arrow, as shown on the left side of FIG.
The flange portion 12 is engaged with the locking portion 110, and the one end portion 3a and the other end portion 3c of the rod portion are pulled out in a bundled state, and the central portion 3b bent into an O shape or an L shape is deformed. It is difficult to obtain a large pull-out strength. On the other hand, as shown on the right side of FIG. 3C, in the nail of the first embodiment, the rod 3
The other end 3c of the rod 3 is AL
Since the one end portion 3a and the flange portion 12 of the rod portion 3 are pulled out while remaining on the C-plate, the width of the central portion 3b in the lateral direction is reduced, and a large pull-out resistance cannot be obtained.

FIGS. 4 (A), (B), (C), (D), and (E) show locking portions 110, 210, 310, 410, 510 formed by rolling or pressing, respectively. Is shown. FIG. 5 (A) shows how to make the locking portion, in which a cut is made at the tip of the rod portion 3 with a cutter 201 to form a V-shape, and then the V-shaped tip portion 3f is hit with a hammer. As a result, the tip 3f is expanded in the lateral direction,
As shown in (B), the locking portion 110 is formed.
In addition, 12 is a flange part, 2a is a notch.

(Fourth Embodiment) FIG. 6 is a diagram showing possible problems of the third embodiment described above. When the locking portion 110 is hit with a hammer and the rod portion 3 is driven, the other end portion 3c of the rod portion 3 may be bent as shown in FIG. In order to solve this problem, a nail according to a fourth embodiment shown in FIG. 7 is provided.

As shown in FIG. 7A, the nail according to the fourth embodiment comprises a rod 103 having one end 103a and the other end 103a.
The only difference from the third embodiment is that c is a hard part work hardened by rolling and the central part 103b is a soft part not hardened by work.

In this manner, as shown in FIG. 7 (B), the nail 103 is used to fix the roofing material 502 to the ALC plate 501, and the other end 103c of the bar 103 is fixed to AL.
When driven in the direction of the C plate 501, as shown in FIG. 7C, the one end 103a and the other end 103c are work-hardened, so they do not bend and remain straight. The point that the central portion 103b, which is a soft portion that is not work-hardened, expands in the O-shape or L-shape in the lateral direction is the same as in the previous embodiment. FIG. 7D is a plan view of the nail.

FIG. 8 is a diagram showing a method of manufacturing this nail.
230 is a fixed-side die, and 231 is a moving-side die. The dies 230 and 231 are formed with knurls such as twill and vertical stitches for work-hardening the one end 103a and the other end 103c of the bar 103. (Knowledges are shown only for the die 231 on the moving side.) Further, grooves 230e, 2 for forming a locking portion are provided.
31e is provided on the fixed die 230 and the movable die 231. In addition, the center part 230b, 231 of the die
b is formed in a concave shape so that the central portion of the rod portion is not hardened.

Further, when the size of the nail is long, even if one end and the other end of the rod are strengthened by rolling, the strength is insufficient, and as shown by the imaginary line in FIG. The other end of the rod may be bent. Therefore, as shown in FIG. 19, the entire rod portion 803 of the nail is quenched, and thereafter, only the central portion, that is, the tip portion 803b is tempered. By doing so, one end 803a and the other end 803c of the rod portion 803 are formed.
Is hardened by quenching, and the central portion 803
Since b is tempered, it can be bent. Therefore, in this case, even if the nail is long, the other end 803c of the rod 803 does not bend as shown by the two-dot chain line.

Fifth Embodiment FIGS. 9A and 9B are a front view and a side view, respectively, of a tip of a nail according to a fifth embodiment. Although not shown, the nail head of the fifth embodiment has exactly the same structure as the head of the third embodiment or the fourth embodiment. Unlike the tip of the spear in the second embodiment, the tip of the U-shaped bent portion of the central portion 303b of the nail bar 303 of this embodiment has a blade 303e having only a blade shape.
Is formed. That is, in the shape like the tip of the sharp spear as in the second embodiment, the wood may be broken.
For example, on the ALC plate, a rim wood 25 as shown in FIG.
1 is fixed, the edge of the blade 303e is arranged in a direction orthogonal to the direction in which the fiber of the rim wood 251 extends, so that the blade 303e having only a blade shape is formed.
Thus, the nail can be driven while cutting the fibers of the trunk wood. As described above, the nail is driven while cutting the fiber with the blade 303e having only the blade shape.
This nail can be used without breaking the wood. In FIG. 10, reference numeral 252 denotes a hole formed by the nail blade 303e.

(Sixth Embodiment) FIGS. 11A and 11B are a front view and a side view showing a tip shape of a nail according to a sixth embodiment. A blade 403e having a blade shape only at the central portion 403b of the nail bar portion 403 bent in a U-shape.
Is formed, and both ends of the edge of the blade 403e having this blade shape are curved. The only difference from the fifth embodiment is that both ends of the edge of the blade 403e are curved as described above. The nail according to the sixth embodiment can be driven into wood or the like more smoothly than the nail according to the fifth embodiment, because both ends of the edge of the blade 403e having only the blade shape are curved.

(Seventh Embodiment) FIG. 12B is a perspective view of a seventh embodiment.
The nail according to the seventh embodiment has an annular portion 512 instead of the flange 12 of the nail according to the fourth embodiment. The annular portion 512 is formed by bending a part of the nail bar portion 503. The other end 503c of the rod 503 is inserted through the annular portion 512 so that the engaging portion 110 fixed to the other end 503c can be engaged with the annular portion 512. The fourth embodiment is the same as the fourth embodiment in that one end 503a and the other end 503c of the rod 503 are work-hardened by rolling, and the center 503b is not work-hardened and is a soft part.

In the nail according to the seventh embodiment, since the annular portion 512 serving as a flange portion is formed by bending a part of the rod portion 503, it can be formed easily at low cost.

FIG. 12A shows a state in which the rod portion 503 is bent in a U-shape and before the annular portion 512 is formed. The soft portions 503b and 512 are a central portion and an annular portion, and are easy to bend. Hard part 50
3a and 503c are hardened portions that are hardened by work.

(Eighth Embodiment) FIG. 13 shows an eighth embodiment. The nail according to the eighth embodiment is different from the nail according to the third embodiment shown on the left side of FIG. 3 in the outside in the direction in which the U-shaped central portion 3b of the rod portion 3 overlaps, and at the flange portion. The third embodiment differs from the third embodiment only in that a V-shaped notch 701 is provided on the side connected to the twelfth embodiment. The same components as those of the third embodiment are denoted by the same reference numerals, and description thereof is omitted.

When the locking portion 110 of the nail is further struck from the state shown in FIG.
As shown in (B), (C) and (D), the other end 3c is the ALC plate 6
It is driven into. At this time, the portion where the outer notch 701 exists in the direction in which the central portion 3b overlaps is easily bent outward at an acute angle, and a large stress is applied. First, as shown in FIGS. One end 3a side of the central portion 3b is sharply bent in an L-shape from the position 701, and then the other end 3c side is bent as shown in FIG.
The shape after the deformation of the central portion 3b is always the same shape for the same nail because the shape is deformed starting from the notch 701. As shown in FIG. 13 (E), when the pulling test device 200 is used to test the holding force of the nail, that is, the pull-out strength, the same nail is driven even when the hammer striking force and the hammer striking angle are changed. As for, the same pull-out strength was obtained. That is, it was found that the nail provided a holding force without variation.

Incidentally, if a V-shaped notch (not shown)
Is provided inside the central portion 3b of the rod portion 3 in the overlapping direction, there is a notch on the side opposite to the curved side, but there is an uncut portion of the rod portion 3 on the curved side. Therefore, it was found that the curvature became gentle and the holding force was reduced.

FIG. 14 shows the case of the nail shown in FIG. 13 in which the depth N of the notch 701, the distance M from the tip of the central portion 3b to the notch N, and the other end 3c of the rod 3 are the flange 12
FIG. 9 is a view showing that the tip shape of the driven nail, that is, the deformed shape of the central portion is different depending on the dimension L of the portion projecting from the nail. FIG. 14B shows a case where N is deep, M is long and L is long, FIG. 14C shows a case where N is deep, M is long and L is short, and FIG. But shallow, M
Is long and L is long.

From this, it was found that the angle Q between the bent portions at the notch 701 was closest to the right angle in the case of FIG. 14B, and the pullout strength was the maximum. That is, the case where the depth N of the notch 701 is deep, the distance M between the notch 701 and the tip is large, and the dimension L of the other end 3c protruding from the flange portion 12 is long is the maximum. The cross-sectional shape of the notch 701 is not limited to the V-shape, and may be an arc shape or a rectangular shape.

(Ninth Embodiment) The ninth embodiment shown in FIG. 15 is the same as the eighth embodiment shown in FIG. 13 except that the position of the notch 702 is different. In the ninth embodiment, the notch 70
Numeral 2 is provided outside a portion of the central portion 3b of the rod portion 3 that is continuous with the locking portion 110. As shown in FIGS. 15 (B), (C), and (D), when the locking portion 110 is hammered, regardless of the force applied when hitting with the hammer or the angle of the hammer with respect to the locking portion 110 when hitting. Meanwhile, the same nail was deformed into the same shape, and the same holding force was obtained. FIG.
5, the depth N of the notch 702 and the central portion 3
The tip shape of the driven nail, that is, the deformed shape of the central portion differs depending on the distance M from the tip of b to the notch N and the size of the portion where the other end 3c of the rod portion 3 protrudes from the full flange 12. FIG. FIG. 16 (B)
FIG. 16 shows a case where N is deep, M is long, and L is long.
FIG. 1C shows a case where N is deep, M is long and L is short.
6 (D) is a case where N is shallow, M is long, and L is long.

From this, it was found that the angle Q between the bent portions at the notch 702 was closest to the right angle in the case of FIG. 16B, and the pullout resistance was the maximum. In other words, the maximum was when the depth N of the notch 702 was deep, the distance M between the notch 702 and the tip was large, and the size of the other end 3c protruding from the flange 12 was long.

(Tenth Embodiment) FIGS. 17 and 18 show a tenth embodiment. This tenth
This embodiment differs from the fourth embodiment shown in FIG. 7 only in that notches 701 and 702 are provided on both outer sides in the direction in which the central portion 103b of the bar 103 overlaps. In the tenth embodiment, the central portion 103b is bent in an O shape from the notches 701 and 702. This central part 103b
Is always constant for the same nail regardless of the angle with respect to the locking portion 110 when hitting with a hammer and the degree of force applied when hitting with a hammer, and a uniform holding force without variation is obtained. Was.

The number of notches is not limited to two, but may be three or more. Further, only one notch may be provided on one side.

(Eleventh Embodiment) As shown in FIG. 21A, water intrudes from a gap 905 around the rod 3 into a hole around the rod 3, especially a hole that is enlarged inside. However, when this nail is used in a situation where it is exposed to rainwater or the like, there is a problem that the nail is corroded. Therefore, for example, as shown in FIG. 21 (B), even if an O-ring 906 surrounding the central portion of the U-shaped bar portion 3 is provided in contact with the flange 2, the gap 905 existing inside the O-ring 906 can be removed. There is a problem that water invades into the hole and corrosion of the rod 3 cannot be prevented. The eleventh embodiment solves this problem.

As shown in FIGS. 20A and 20E, the nail 900 according to the eleventh embodiment includes a flange 2, a rod 3, and a film 902. The other end of the rod portion 3 movably penetrates the U-shaped notch 2a of the flange portion 2.

As shown in FIG. 20A, the central portion 3b of the rod portion 3, that is, the region indicated by hatching around the foot portion 3b,
A film 902 made of a soft and elastic rubber material is coated. The film 902 concentrically surrounds the rod 3 as shown in FIG. The film 902 has a property that it can move with respect to the rod 3 while surrounding the rod 3.

When this nail 900 is driven into the ALC plate 6 with the roofing material 7 interposed therebetween, as shown in FIG.
Since the member 2 is movable with respect to the rod portion 3, the film 902 is wound up with the driving of the nail and is positioned between the roofing material 7 and the flange portion 2 while surrounding the rod portion 3. Further, when the other end 3c of the rod portion 3 is driven, as shown in FIG. 20C, the central portion 3b of the rod portion 3 expands in the lateral direction, and the flange portion 2 is pressed against the roofing material 7. As shown in FIGS. 20 (C) and 20 (F), the membrane 902 completely surrounds the periphery of the rod portion 3 and is crushed and expanded between the flange portion 2 and the roofing material 7 to serve as a packing. I do. Therefore, the upper end of the hole into which the nail 900 is driven is completely sealed by the rolled-up film 902, so that rainwater or the like is prevented from entering the hole which is enlarged inside the hole formed by the nail. can do.
Further, the triangular gap between the central portions 3b, 3b of the rod portion 3 facing each other is filled in while the film 902 is rolled up, and water enters through the triangular gap. Is prevented. Therefore, nails 900 and A
The deterioration of the LC plate 6 can be prevented.

The above-mentioned film 902 is provided on the entire area of the central portion 3b of the rod 3 at a certain dimension below the flange 2. However, except for the tip of the rod 3, only a predetermined area near the flange is coated. You may make it.

In the eleventh embodiment, the film 902 wound around the rod portion 3 to prevent water from entering is provided. Similarly, a film that is rolled up and serves to prevent intrusion of water may be provided.

(Twelfth Embodiment) As shown in FIG. 23B, the nail 1 shown in FIG. 23A is driven into a hard material 7 so that two central portions 3b are arranged in parallel. One breaks away from the other. The twelfth embodiment is to prevent this hip break.

As shown in FIG. 22, the nail 950 according to the twelfth embodiment includes a flange 2, a rod 3, and a washer 9.
51 are provided. Since the flange 2 and the rod 3 have exactly the same structure as those of the above-described embodiment, the same reference numerals are given and the description is omitted.

The washer 951 is a hollow disk which is pressed into and engaged with two parallel central portions 3b of the rod portion 3. The washer 951 can move toward the flange portion 2 when a predetermined force is applied.

When this nail 950 is driven into a hard material (not shown), one of the two parallel central portions 3b separates from the other and tries to break the waist.
Since the member 51 is restrained, hip breakage is prevented. Then, the nail 950 is driven into a hard material, and the washer 95
When 1 hits the end face of the hard material, the washer 951 is pushed by that end face and moved toward the flange 2. When the nail 950 is completely driven, the washer 951 comes into close contact with the flange 2 and the end surface of the hard material.

Each of the nails of the first to eleventh embodiments may be provided with a washer for preventing hip breakage. The first
In the case where a washer is provided on the nail of the first embodiment, it is desirable that the above-mentioned film for preventing inundation be provided between the washer and the flange portion.

[0064]

According to the first aspect of the present invention, there is provided a nail having a notch opened toward the side, and one end fixed to the flange, and a central portion connected to the one end bent in a U-shape. And a rod portion having the other end movably penetrating the notch of the flange portion and projecting a predetermined dimension to the opposite side from the center portion.

Therefore, when the nail according to the first aspect of the present invention is driven, the central portion of the rod serving as the tip bends into, for example, an O-shape or an L-shape. A holding force, that is, a strong pull-out strength can be obtained.

In the nail of the first aspect, since the rod portion is inserted through a notch opened toward the side, the rod portion is inserted into the notch of the flange portion from the side in manufacturing the nail. It can be folded and inserted into a shape. Therefore, the nail according to the first aspect can be manufactured from one wire rod, and can be mass-produced inexpensively and quickly.

A nail according to a second aspect of the present invention is the nail according to the first aspect, further comprising a bulge protruding into the notch so that the bar does not protrude to the side from the notch. .

In the nail according to the second aspect, the bar portion can prevent the bar portion from bending sideways from the notch and coming out. Therefore, the nail according to the second aspect can be driven in a correct form and exert its function.

According to a third aspect of the invention, there is provided a nail having a flange portion, one end of which is fixed to the flange portion, a central portion connected to one end thereof is bent in a U-shape, and the other end is movable in the flange portion. A rod portion that penetrates and protrudes a predetermined dimension on the opposite side to the central portion; one end portion and the other end portion of the rod portion are hard portions; and the central portion is a soft portion. In the nail of the third aspect, since the one end and the other end of the rod are hard portions, the nail can be reliably driven into a gypsum board or an ALC plate without bending. In particular, the other end of the rod protruding from the flange does not bend during driving. Moreover, since the central portion of the rod portion is made of a soft portion, it easily spreads in the lateral direction,
Great holding power is obtained.

The nail according to the fourth aspect of the present invention can be easily manufactured and inexpensive because the one end and the other end, which are the hard portions, are work-hardened.

According to a fifth aspect of the present invention, in the nail of the third aspect, the one end and the other end are hardened by quenching, and the central portion is softened by tempering. And the multi-end portion can be formed as a very hard and strong hard portion, and the central portion can be easily formed as a soft portion.

[0072]

[0073]

[0074]

[0075]

[0076]

[Brief description of the drawings]

FIGS. 1A and 1B are a perspective view and a plan view of a nail according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a nail according to a second embodiment of the present invention.

FIGS. 3A, 3B and 3C are front views showing a third embodiment and a fourth embodiment in contrast.

4 (A), (B), (C), (D), and (E) are front views showing examples of a locking portion.

FIGS. 5A and 5B are diagrams showing a method of forming a locking portion.

FIG. 6 is a diagram showing possible problems of the present invention.

7 (A), (B), (C), and (D) are views showing a fourth embodiment, and FIG. 7 (A) shows a state before bending a rod portion into a U-shape. Fig. 7 (B) shows this nail in the middle of ALC
FIG. 7 (C) is a view showing a state where the nail is completely driven into the ALC plate, and FIG. 7 (D) is a plan view of the nail.

8 (A) and 8 (B) are views showing a method for manufacturing a nail according to the fourth embodiment, FIG. 8 (A) is a perspective view, and FIG.
(B) is a side view.

FIGS. 9A and 9B are a front view and a side view of a tip of a nail according to a fifth embodiment.

FIG. 10 is a diagram showing holes when the nail according to the fifth embodiment is driven into the wood of the rim.

FIGS. 11A and 11B are a front view and a side view of a tip portion of a nail according to a sixth embodiment.

12 (A) and 12 (B) are views showing a nail of a seventh embodiment, and FIG. 12 (A) is a view showing a state before bending a rod portion into a U-shape. FIG. 12B is a perspective view of the nail.

FIG. 13 is a diagram illustrating an operation of the nail according to the eighth embodiment.

FIG. 14 is a diagram illustrating a deformed shape according to the depth and position of a notch and the size of the other end of a rod protruding from a flange according to the eighth embodiment.

FIG. 15 is a diagram illustrating the operation of the nail according to the ninth embodiment.

FIG. 16 is a diagram illustrating a deformed shape according to the depth and position of a notch and the size of the other end of a rod protruding from a flange according to a ninth embodiment.

FIG. 17 is a front view of a nail according to a tenth embodiment.

FIG. 18 is a diagram illustrating the operation of the nail according to the tenth embodiment.

FIG. 19 is a diagram showing a modification of the fourth embodiment.

FIG. 20 is a diagram illustrating a nail according to an eleventh embodiment.

FIG. 21 is a diagram illustrating a state in which water enters a hole in the first embodiment and the improvement plan thereof.

FIG. 22 is a front view of a nail according to a twelfth embodiment.

FIG. 23 is a diagram illustrating a state in which the nail according to the first embodiment breaks down;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... nail, 2, 12 ... flange part, 3 ... rod part, 3a ... one end,
3b: central part, 3c: other end, 2a, 12a: notch, 11
0: locking portion, 303e, 403e: blade, 512, 612: annular portion, 701, 702: notch.

Claims (5)

(57) [Claims] 1. A flange portion having a notch opened to the side, one end is fixed to the flange portion, a central portion connected to the one end is bent in a U shape, and the other end is the flange portion. A nail portion movably penetrating the notch and protruding a predetermined dimension on the opposite side to the central portion. 2. The nail according to claim 1, further comprising a bulge protruding into the notch so that the bar does not protrude laterally from the notch. 3. A flange part, one end of which is fixed to the flange part, a central part connected to one end thereof is bent in a U-shape, and the other end movably penetrates the flange part, and A nail part protruding by a predetermined dimension on the opposite side to the nail part, wherein the rod part has a hard part at one end and the other end, and a soft part at the center part. 4. The nail according to claim 3, wherein said one end and said other end are work hardened. 5. The nail according to claim 3, wherein the one end and the other end are hardened by quenching, and the central part is softened by tempering.