JPH08254208A - Nail - Google Patents

Abstract

PURPOSE: To provide a widening leg type nail which can be commonly adapted to foamed concrete and hard concrete. CONSTITUTION: A first nail 5 and a second nail 7 respectively have heads 3, 7 on each one side of leg part thereof. Legs 2, 6 of the nails 5, 9 are connected in a parallel state by means of a washer 10. A projection 12 is formed on the leg 2 of the first nail 5 at its position near a leading end which is more tip side than the leading end of the second nail 9. A widening suppression part 13 is formed on the way of the leg 6 of the second nail 9. The second nail 9 is further driven in such the state as that the washer 10 abuts against a substance to be fastened, so that the leg 6 of the second nail 9 is widened while being guided by the projection 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an open leg nail used for fixing members and equipment to concrete or foam concrete (ALC).

[0002]

2. Description of the Related Art In order to fix interior members and various equipment to concrete constituting a building, nails or anchors are used which have pull-out resistance by opening legs by driving.

Conventionally, in the above-described nail, a cutting portion is provided in the first nail body using a circular wire in a range reaching the head with a part of the tip left, and a semicircular wire is attached to the cutting portion. It has a structure in which the used second nail body is stacked and both nail bodies are fastened with washers,
If the second nail body is driven in while being inserted into the pilot hole provided in the concrete, the second step will be performed by using the tip step portion of the first nail body as a guide.
The tip ends of the legs of the are opened, and pulling resistance can be obtained.

Further, the anchor has a structure in which the inside of the anchor is hollow except for the tip portion of the rivet, the tip portion is vertically divided by a slit, and a pin is inserted into the hollow portion. When the pin is driven in with the rivet inserted, the tip of the rivet opens and the pullout strength is obtained.

[0005]

By the way, the above-mentioned conventional nails and anchors are designed to open the legs by driving the second nail body or the pin, but the second nail body or the pin is driven. Since there is no function to temporarily prevent the leg from opening in the direction, the leg will be opened at the same time as driving, so even if it can be used for hard concrete for drilling a pilot hole, it must be driven directly without drilling the pilot hole. There is a problem that it cannot be used for non-foamed concrete.

In addition, since all of them have a structure in which the amount of open legs generated is constant, stronger impact force is required for harder concrete, and the manufacturing process requires man-hours and is expensive. There is also a problem.

Therefore, an object of the present invention is that it can be used for both hard concrete and foam concrete, and
The purpose of the present invention is to provide a nail that can be fastened to hard concrete by simply tapping it, and has a simple structure and low manufacturing cost.

[0008]

In order to solve the above problems, the invention of claim 1 is the same as a first nail body having a head at one end of a leg portion using a deformed wire, A second nail body having a head portion at one end of the leg portion using the deformed wire;
The first nail body has a leg portion inserted into a hole of the washer so that the head portion of the second nail body overlaps the washer, and the second nail body has a head portion of the washer. The leg portion is inserted into the hole of the washer so that the leg portion of the first nail body is separated from the second portion by the leg portion of the first nail body.
A protrusion projecting toward the second nail body is formed at a position closer to the tip than the tip of the leg portion of the nail body, and the leg portion of the second nail body is restrained from opening in the driving direction in the vicinity of the washer. This is a configuration in which a section is provided.

According to a second aspect of the present invention, in the first aspect of the invention, the projection provided on the leg portion of the first nail body is formed by punching out a part of the leg portion by press molding. It was adopted.

According to a third aspect of the invention, in the first or second aspect of the invention, the first nail body and the second nail body are made harder than the washer by means such as heat treatment. .

According to a fourth aspect of the present invention, in the first to third aspects of the invention, the washer is curved in a mountain shape, and the hole connecting the both nail bodies has a long axis and a short axis in the flat state of the washer. The structure is such that the holes are formed in a certain shape.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

In the first example shown in FIGS. 1 to 3, a nail 1 is provided with a head 3 projecting toward the arc-shaped outer peripheral surface at one end of a leg 2 made of a deformed wire having a semicircular cross section. The first nail body 5 having the other end as the tip 4 and the head 7 provided at one end of the leg 6 using the deformed wire rod having the semicircular cross section, and the second end having the other end 8 as the tip 8 And a washer 10 that binds the nail bodies 5 and 9 in a parallel state in which the flat surfaces of the leg portions 2 and 6 are overlapped. In the illustrated case, both nail bodies 5 and 9 are combined.
The legs 2 and 6 have substantially equal lengths, but the first nail body 5
The length of the second nail body 9 with respect to can be set so as to obtain the required opened leg state.

The head 3 of the first nail body 5 has a washer 1.
0 is inserted into the hole 11 of the washer 10, and the second nail body 9 has the leg 6 with the hole 11 of the washer 10 so that the head 7 is located away from the washer 10. , And in this state, the leg portions 2 and 6 of the nail bodies 5 and 9 are bound by the washer 10 so that the flat surfaces are parallel to each other.

In the leg portion 2 of the first nail body 5, a projection 12 is provided at a position closer to the tip than the tip 8 of the second nail body 9 and projects toward the second nail body 9 side. Has been. This protrusion 1
2 is formed by bending the middle of the leg portion 2 into a substantially semi-circular shape in the illustrated case using a means such as press molding, but it may be formed in a mountain shape such as a lateral V shape. The protrusion 12 has elasticity by bending the leg 2.

The second nail body 9 is formed by the washer 10 as the first nail body.
Due to the connection with the nail body 5, the tip 8 is positioned immediately above the protrusion 12, and the leg portion 6 of the second nail body 9 is attached to the portion near the washer 10 in the driving direction. Is provided with an open leg restraining portion 13.

In the case of the open leg restraining portion 13 shown in the figure, a bent step portion projecting to the flat surface side is formed in the middle of the leg portion 6 by press molding at a position above the washer 10.
The stepped portion is structured to be locked on the head portion 3 of one nail body 5.

The above-described leg opening restraining portion 13 has a second
1 is bent in the direction opposite to that shown in FIG. 1 to form a step, and this step is locked on the washer 10, or the required number of projections are formed on the outer peripheral surface of the leg. Is formed by sandwiching and protruding a part of the peripheral surface of the leg portion, and this protrusion is locked on the washer 10, or a protrusion is formed on one of the overlapping surfaces of the leg 2 and the leg 6. On the other hand, it is possible to adopt a structure in which a concave portion into which this protrusion is fitted is provided.

The washer 10 uses a flat circular metal plate and has a structure curved in an arcuate mountain shape. The hole 11 provided in the center has a hole 11 as shown in FIGS. 1 (A) and 1 (B). When this washer 10 is flattened, the overlapping leg portions 2, 6
The washer 10 is formed into an ellipse or an ellipse having a minor axis equal to the diameter and a major axis slightly longer than the diameter, and the washer 10 is shaped so as to curve in an arc shape along the major axis direction of the hole 11.

Therefore, in the major axis direction of the hole 11 of the washer 10, the planar distance becomes short due to the arcuate curvature,
When the legs 2, 6 are inserted into the hole 11 so as to be aligned in the long axis direction, as shown in FIGS. 2 (A) and 2 (B), the legs 2,
6 will be bound by the hole 11 in the overlapping direction.

Therefore, the dimension of the hole 11 in the major axis direction is set so that the leg portions 2 and 6 are closely fitted when the washer 10 is curved in an arc shape.

The hole 11 is not limited to an ellipse or an ellipse, and may be a hexagon or a star, as long as it satisfies the relationship between the long axis and the short axis.

With respect to the washer 10, the first nail body 5 and the second nail body 9 are hardened by a hardening treatment such as a heat treatment.

The nail 1a shown in FIG. 6 is a second example in which a flat washer is used as the washer 10a.
The hole 11a provided in the base plate has an inner diameter such that the diameters of the overlapped leg portions 2 and 6 are exactly fitted.

In this second example, the second
Since the generation of resistance becomes large when the open leg restraining portion 13 of the nail body 9 is detached, it is suitable for hard concrete.

In the third example shown in FIGS. 5A and 5B, the recessed portion 14 is formed in the peripheral portion of the hole 11 in the washer 10, and the head portion 3 of the nail bodies 5 and 9 is formed in the recessed portion 14. , 7 are accommodated, and the occurrence of a protruding portion on the surface of the object to be fastened a at the completion of driving is minimized.

In both examples, both nail bodies 5 and 9 are
Although a wire rod having a semicircular cross-section was used, a deformed wire rod having another cross-sectional shape such as a quadrangle may be used.

In the fourth example shown in FIG. 7, as shown in FIGS. 8 and 9, a wire rod having a quadrangular cross section is used for both nail bodies 5 and 9, and they are provided on the leg portion 2 of the first nail body 5. The protrusion 12 is formed by punching out a part of the leg 12 by press molding.

In the case of FIGS. 8 (A) and 8 (B), the protrusion 12 is formed by pressing one side of the leg 2 with a press die to press the recessed portion 15 so that the escape of the leg material can be prevented. The projection 12 is formed in a taper shape that is inclined upward toward the tip 4 of the leg 2.

In the example of FIGS. 8A and 8B, the width of the pressure recess 15 and the protrusion 12 of the leg 2 is made narrower than the width of the leg 2, but FIGS. As shown in B), the pressure recess 15 may be applied to the entire width of the leg portion 2 to ensure a sufficient amount of the protrusion 12 to be driven out.

As in the case of the fourth example, when the projection 12 is formed by stamping and molding, the projection 1 is formed.
There is an advantage that the formation of 2 can be performed easily and efficiently at low cost.

The nail of the present invention has the above-mentioned structure. Next, a method of fixing an object to be fastened to foam concrete using the nail of the first example will be described with reference to FIGS. 4 (A) to 4 (E). It will be explained using the subject.

As shown in FIG. 4 (A), the object to be fastened a is laid on the foamed concrete b, and the tip of the first nail body 5 of the nail 1 is inserted into the foamed concrete b through the hole c previously provided in the object to be fastened a. And hit the head 7 of the second nail body 9 to drive it.

As shown in FIG. 4A, the head 7 of the second nail body 9
When hitting, the second nail body 9 and the first nail body 5 become
Since the engagement state of the leg opening restraining portion 13 is held by the washer 10, it is driven into the foamed concrete b as a unit and does not open the leg in the foamed concrete b without a pilot hole. enter in.

When the above driving is continued, the washer 10 contacts the surface of the object to be fastened a as shown in FIG. 4B, and when it is further driven, the first nail body 5 is contacted as shown in FIG. 4C. The washer 10 pushed by the head portion 3 of the above becomes flat, and the head portion 3 presses the object to be fastened a against the foamed concrete b through the washer 10.

As described above, when the washer 10 is curved in a chevron shape so as to have elasticity, the washer 10 is brought into contact with the object (a) to be fastened or the head 3 of the first nail body 5 is fastened. There is an advantage that the shock when the object (a) is fastened can be buffered, and even if the fastened object (a) is weak or brittle, it can be fastened without damage.

When the second nail body 9 is further struck in this state, the striking force is directly applied to the spread leg restraining portion 13. At this time,
Since the washer 10 is flat, as shown in FIG.
As shown in (B), the long axis direction of the hole 11 is such that the legs 2, 6
And the leg portions 2 and 6 are unbound in the overlapping direction.

Therefore, when the second nail body 9 is struck, the spread leg restraining portion 13 is easily detached, and only the second nail body 9 enters as shown in FIG. 4 (D).

When the second nail body 9 enters, the tip of the leg portion 6 rides up on the protrusion 12 and is guided to the opposite side of the first nail body 5 to open the leg.

As shown in FIG. 4 (E), when the second nail body 9 is completely driven in, the distal end side of the leg portion 6 is opened, whereby a strong pull-out resistance is obtained and the head portion 7 is The object to be fastened a is fixed to the foam concrete b through the washer 10.

As described above, in the nail 1 of the present invention, by providing the second nail body 9 with the leg opening suppressing portion 13, it is possible to prevent the leg opening from occurring until it is driven into the foam concrete b. It is possible to use it for foamed concrete that does not have a pilot hole.

Although not shown, when used for hard concrete, a pilot hole for inserting the leg portions 2 and 6 is drilled in the concrete, and the leg portion 2 is passed from the pilot hole of the object to be fastened to the pilot hole of the concrete. , 6 is inserted and the second nail body 9 is driven in a state where the washer 10 is in contact with the object to be fastened, and the striking force releases the open leg restraining portion, so that the leg portion of the second nail body 9 projects. By being guided by the section, the legs are opened, and by pulling into the concrete, pullout strength can be obtained, and the object to be fastened can be fixed.

[0043]

As described above, according to the present invention, the second
Since the nail opening is provided with a leg restraint, it can be used for both foamed concrete and hard concrete, and in particular, it can be easily fastened by simply tapping into hard concrete, and the structure is simple and the manufacturing cost is low. It is cheap.

Also, by forming the protrusion provided on the first nail body by bending the leg portion, it has elasticity and the leg portion of the second nail body is always spread outward due to the elasticity. As a result, stable spread of legs can be obtained, and excellent pull-out strength can be obtained.

[Brief description of drawings]

FIG. 1A is a front view showing a first example of a nail according to the present invention, and FIG. 1B is a perspective view of the same.

FIG. 2 (A) is an enlarged cross-sectional view of a head part showing a state in the middle of driving in the same as above, and FIG. 2 (B) is a transverse plan view of the same.

FIG. 3 (A) is an enlarged vertical sectional view showing a state where the washer is driven evenly, and FIG. 3 (B) is a transverse plan view of the same.

4A to 4E are process diagrams sequentially showing the nail driving state.

5 (A) is an enlarged vertical sectional view showing a third embodiment of the nail according to the present invention in the middle of driving, and FIG. 5 (B) is a vertical sectional view showing the same driving completion state.

FIG. 6 is a front view showing a second embodiment of the nail.

FIG. 7 is a front view showing a fourth example of the nail according to the present invention.

FIG. 8A is a perspective view showing another example of a protrusion provided on a leg portion, and FIG. 8B is a transverse sectional view of the same.

9A is a perspective view showing still another example of a protrusion provided on a leg, and FIG. 9B is a transverse sectional view of the same.

[Explanation of symbols]

 1 Nail 2, 6 Leg part 3, 7 Head part 4, 8 Tip 5 1st nail body 9 2nd nail body 10 Washer 11 Hole 12 Protrusion 13 Opening suppression part

Claims (4)

[Claims] 1. A first nail body having a head at one end of a leg portion using a deformed wire and a second nail body having a head at one end of a leg also using the deformed wire. And a washer that binds both nails together in a parallel state. The first nail body has the legs inserted into the holes of the washer so that the head overlaps the washer, and the second nail body has the head portion. The leg is inserted into the hole of the washer so that it is positioned away from the washer, and is bound with the first nail body. The tip of the first nail body is more distal than the tip of the leg of the second nail body. A nail characterized in that a protrusion protruding toward the second nail body side is formed at a position closer to the second nail body, and a leg portion of the second nail body is provided with an opening leg restraining portion in the driving direction in the vicinity of the washer. . 2. The nail according to claim 1, wherein the protrusion provided on the leg portion of the first nail body is formed by punching out a part of the leg portion by press molding. 3. The nail according to claim 1, wherein the first nail body and the second nail body are harder than the washer by means of heat treatment or the like. 4. The washer is curved in a chevron shape, and the hole for connecting both nails is formed in a hole having a major axis and a minor axis in a flat state of the washer. Nail according to any one of.