JPH10331817A - Open leg control nail - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a leg control nail which can be formed at the same time as the formation of a leg, and can be manufactured without increasing the number of steps. Two legs 1 and 2 made of a shaped wire have heads 3 and 4 at one end and tips 5 and 6 at the other end, while projecting toward the flat surface at a position near the tip of the leg 1. A projection 7 for opening the legs is provided, and both legs 1 and 2 are
The tip of the other leg 2 does not overlap the leg-opening projection 7 of the one leg 1, and the head 4 of the other leg 2 is the head 3 of the one leg 1.
In the leg control nail nailed by the washer 9 with the flat surfaces overlapped so as to be positioned higher than the lower surface, the leg 1 is located at the position where the flat surfaces of the two legs 1 and 2 are tightened by the washer 9. 21 and recess 22 along the width direction
A plurality of leg control units 8 are alternately continuous in the axial direction of the legs 1 and 2 and are fitted to each other by overlapping the legs 1 and 2.
a, and when the driver strikes the ALC 14, the leg opening controller 8a
Stabilizes the condition of the open leg.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an open leg control nail used for directly mounting a member, such as a thin slate plate, which is easily broken when an excessive pressing force is applied thereto, to an ALC (foam concrete) building material. More specifically, the present invention relates to a structure of a leg opening control portion provided on an overlapping surface of two legs.

[0002]

2. Description of the Related Art As an open leg control nail for fixing various members to an ALC, it does not come off immediately after being loosened after construction, and is opened to an ALC of any hardness evenly, so that an object to be attached is not damaged at the time of driving. The applicant has proposed in Japanese Patent Application No. 7-231498.

FIGS. 4 (A) to 4 (C)
As shown in the figure, two legs 1 and 2 made of a wire having a cross-sectional shape having a flat surface on the peripheral surface have heads 3 and 4 at one end and tips 5 and 6 at the other end. 1 is provided at a position close to the front end of the leg 1, and a pair of leg control parts 8 is provided on the overlapping surface of both legs 1 and 2.
Are fitted, the tip 6 of the other leg 2 is positioned so as not to overlap the leg-opening projection 7 of the one leg 2, and
On the other hand, a flat surface is overlapped so that the head 4 of the leg 2 is located above the head 4 of the one leg 1, and the structure is tight with a washer 9.

The leg opening control section 8 has a truncated cone-shaped recess 10 provided on the flat surface of one leg 1, and a truncated cone provided on the flat surface of the other leg 2 and fitted into the recess 10. The small projection 11 is formed by press molding, and the fitted state of the leg opening control unit 8 is held by the tightness of the washer 9.

[0005] When the leg control nail in the set state shown in FIG. 4 (A) is driven toward the ALC 14 from an object 13 such as a slate plate having a nail hole 12 as shown in FIG. 4 (B). Until the washer 9 comes into contact with the object 14, the two leg bodies 1 and 2 are not displaced in the axial direction due to the fitting of the leg opening control unit 8, and proceed straight while overlapping each other. When it is further driven while being in contact with the object 13, the two legs 1
And 2 move forward, so that the washer 9 is relatively one leg 1
, The washer 9 passes through the fitting portion between the recess 10 and the small projection 11, while the head of the leg 1 abuts the washer 9, and the approach stops.

At the same time, the depression 1 due to the washer 9
0 and the small projection 11 are loosened, the recess 10 and the small projection 11 fitted to each other are separated, and the leg 2 receives the driving force of the hammer while the leg 2 is stopped. After sliding into the ALC 14, the tip of the other leg 2 rides on the projection 7 for the open leg provided on the one leg 1,
As shown in (B), the other leg 2 is opened in a direction away from the one leg 1, and the fastening is completed with the head 4 abutting on the washer 9.

[0007] As described above, since the open leg control nail holds the fitted state of the open leg control section 8 with the washer 9, the ALC
The leg is not opened until the middle of the driving to the A14, and the leg is opened after the head 3 of the leg 1 abuts on the washer 9 so that the ALC 14 of any hardness is constant. An open leg state is obtained, and a large load is not applied to the attached object 13.

[0008]

By the way, in the above-mentioned open leg control nail, a separate press step is required for the formation of the open leg control unit 8 formed by the recess 10 and the small projection 11, and the manufacturing process of the open / close control nail is performed. And increase the production cost.

SUMMARY OF THE INVENTION An object of the present invention is to provide a leg control nail which can be formed at the same time as the formation of the leg, and can be manufactured without increasing the number of steps.

[0010]

In order to solve the above-mentioned problems, the present invention according to claim 1 comprises two legs made of a wire having a cross-sectional shape having a flat surface on a peripheral surface and a head at one end. The other end has a tip, and one leg is provided with a projection for leg opening protruding toward the flat surface side at a position near the tip of the leg, and the two legs are used, and the tip of the other leg is used for leg opening of one leg. In the opening / closing control nail, which overlaps a flat surface so that the head of the other leg is positioned above the head of the one leg and does not overlap with the protrusion, and is tightened with a washer, the two legs overlap. A plurality of recesses and protrusions along the width direction of the leg are alternately continued in the axial direction of the leg at the position of the portion to be tightly tightened by the washer on the flat surface, and the legs are fitted together by overlapping the legs. This adopts a configuration in which a control unit is provided.

According to a second aspect of the present invention, two legs made of a wire having a cross-sectional shape having a flat surface on a peripheral surface have a head at one end and a tip at the other end. At the position, there is provided a projection for a leg that protrudes toward the flat surface, and the other leg has a length that exceeds the length of the projection for a leg of one leg, and a recess is provided for accommodating the projection for the leg. The open and closed control nails, with the flat legs overlapped so that the heads of the other leg are located above the head of the one leg, were tightened with washers, and the two legs were positioned on the overlapping flat surface of the two legs. At the position of the part to be tightened by the washer, a plurality of concave and convex parts along the width direction of the leg are consecutively arranged alternately in the axial direction of the leg, and the leg control unit is fitted with each other by overlapping the legs. The configuration provided is adopted.

Here, the leg-opening projection protruding toward the flat surface at a position near the tip of the one leg is formed by bending the leg in a meandering manner to form a curved or trapezoidal projection, or It is formed by any of the bumps that are partially raised at the center of the flat surface by press molding.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. Note that the basic structure of the leg control nail is the same as that shown in the section of the prior art with reference to FIGS. 4A to 4C. The description is appended to the description.

In the leg control nail according to the first embodiment shown in FIGS. 1 and 2, the one leg 1 and the other leg 2 are set, and the tip 6 of the other leg 2 is The leg control unit 8a is of a type that is positioned so as not to overlap with the leg-opening projection 7, and is provided on a flat surface where both legs 1 and 2 overlap with each other and that is tightly bound by the washer 9. Trapezoidal or chevron-shaped protrusions 21 along the width direction of the member and recesses 22 into which the protrusions 21 fit.
Are formed in such a manner that a plurality of the legs 1 and 2 are provided alternately and continuously within a range of an appropriate length in the axial direction, and have a structure in which the legs 1 and 2 are fitted to each other by overlapping.

The leg-opening projection 7 is formed by bending the middle of the leg 1 into a mountain shape, a trapezoidal shape, a substantially semicircular shape, a laterally V-shaped shape, or the like using means such as press molding. Is bent, so that the leg-opening projection 7 has elasticity.

The position where the leg control section 8a is provided is such that, when the two leg sections 1 and 2 are overlapped and the leg control section 8a is fitted, the distal end portion 6 of the other leg section 2 is connected to the one leg section 1a. Projection part 7 for open leg
And the head 4 of the other leg 2 is
The position of the washer 9 that is set so as to be higher than the head 3 of the body, and that is tight,
On the other hand, it is set so that a margin is provided between the leg 1 and the head 3.

The leg opening control section 8a can be formed using a punch provided with a convex portion and a concave portion of corresponding shapes continuously on the flat surfaces of both legs 1 and 2, and this punch is formed of both legs. By combining with the processing dies of the heads 3 and 4 of the bodies 1 and 2 and the projection 7 for opening the legs of one leg 1, the legs 1 and 2 can be processed at the same time during the forming process. There is no need to separately increase the manufacturing process of the control nail.

The cross-sectional shape of the two legs 1 and 2 may be square or the like in addition to the semicircle as shown in the figure, and the tip may be tapered or sharp, and may be round or flat. Although the heads 3 and 4 have a substantially semicircular plate shape, the head 4 of the leg 2 may be formed in a straight rod shape.

Next, the leg control nail of the second embodiment shown in FIGS. 3 (A) and 3 (B) is a state in which one leg 1 and the other leg 2 are set, and 6 is a type in which it is positioned so as to overlap with the leg-opening projection 7 of the one leg 1, while the leg-opening projection 7 of the leg 1 is formed into a bump-like projection by press molding, and the other leg is formed. 2 except that a concave portion 15 which is fitted to the leg-opening projection 7 is provided at a position on the distal end side of the flat surface of the first embodiment.
It has the same structure as the leg control nail of the embodiment.

The leg control nail of the present invention is constructed as described above. The leg control nail in the set state shown in FIG. 1A is attached to an object 13 such as a slate plate having a nail hole 12.
If the ALC 14 is hammered into the ALC 14 from above, the legs 1 and 2 move straight into the ALC 14 while overlapping each other until the washer 9 comes into contact with the object 13, and no leg is opened.

That is, since the two legs 1 and 2 are held by the tightness of the washer 9, the fitting of the leg opening control section 8a is maintained.
On the other hand, even if the head 4 of the leg 2 is hit, the two legs 1 and 2 remain connected and integrally enter the ALC 14.

When the washer 9 is further driven in a state in which the washer 9 is in contact with the object 13, the legs 1, 2 move forward with respect to the stopped washer 9. 3, the washer 9 slides through the fitting portion of the leg control section 8a, while the head 3 of the leg 1 comes into contact with the washer 9 and the approach stops.

At the same time, when the tightness of the leg control unit 8a by the washer 9 is released, and a driving force is applied to the leg 2 with a hammer, the leg control unit 8a comes off and stops. , Slides further into the ALC 14, the other end of the leg 2 slides on the leg-opening projection 7 of the one leg 1, and the other leg 2
Upon entering the inside, the legs are opened in a direction away from the one leg 1, and the fastening is completed in a state where the head 4 is in contact with the washer 9.

[0024]

As described above, according to the present invention, the leg-opening control section provided on the overlapping surface of both legs alternately includes a plurality of concave portions and convex portions along the width direction of the leg in the axial direction of the leg. And the legs are overlapped with each other, so that the leg control can be formed at the same time as the leg processing process, and the leg control can be formed without increasing the number of processes. It is possible to reduce the processing cost and improve the production efficiency of the open leg control nail.

[Brief description of the drawings]

FIG. 1A is a front view showing a set state of a leg control nail according to the present invention, FIG. 1B is a longitudinal sectional view showing a driving state of the nail, and FIG. Enlarged sectional view at part

FIG. 2 is an exploded perspective view of a leg control nail.

FIG. 3 (A) is a front view of a set state showing another example of the leg control nail according to the present invention, and FIG. 3 (B) is an exploded perspective view of the same.

4A is a front view showing a setting state of a conventional leg control nail, FIG. 4B is a longitudinal sectional view showing a driving state of the nail, FIG.
(C) is an enlarged sectional view of the leg control part of the leg control nail.

[Explanation of symbols]

 1, 2 Leg 3, 4 Head 5, 6 Tip 7 Leg-opening projection 8a Leg-opening control 9 Washer 10 Depression 11 Small projection 21 Convex 22 Concave

Claims (2)

[Claims] 1. Two legs made of a wire having a cross-sectional shape having a flat surface on a peripheral surface have a head at one end and a tip at the other end.
On one side, a leg-opening projection protruding toward the flat surface is provided at a position near the tip of the leg, and both legs are not overlapped with the leg-opening projection of the other leg, and On the opening / closing control nail, which has flat surfaces overlapped so that the head of the other leg is positioned higher than the head of the other leg, and is tightened with a washer, a portion of the flat surface where the two legs overlap, which is tightened by the washer At a position, a plurality of concave and convex portions along the width direction of the leg are alternately continuous in the axial direction of the leg, and an open leg control unit is provided, which is fitted to each other by overlapping the legs. Open leg control nails. 2. Two legs made of a wire having a cross-sectional shape having a flat surface on a peripheral surface have a head at one end and a tip at the other end.
One leg is provided with a leg-opening projection protruding toward the flat surface at a position close to the tip, and the other leg has a length exceeding the leg-opening projection of the one leg and has a length exceeding the leg-opening protrusion. A recess for accommodating the part is provided,
Opening and closing control nails with both flats overlapped so that the head of the other leg is located above the head of the other leg and tightened with a washer. At the position of the tightening portion, a plurality of concave portions and convex portions along the width direction of the leg are alternately continuous in the axial direction of the leg, and an open leg control unit is provided in which the leg is overlapped with each other by overlapping the leg. An open leg control nail characterized in that: