JP2578295B2 - Open leg nail - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an open nail used for fixing various mounting portions to ALC (lightweight cellular concrete).

[0002]

2. Description of the Related Art As a conventional open leg nail used for ALC,
For example, an open leg nail proposed by Japanese Patent Publication No. 2-61641 has a leg portion divided into a plurality of portions by slits provided along the axial direction from the tip, and a small-diameter connecting portion in which both legs are located in the slit. And a plate-like body fitted on the top end of the slit at the upper end of a wedge body fitted between the sloped surfaces of the legs, And an open leg member having a washer provided on the upper end of the plate-like body so as to be fitted to the leg portion.

When the above open nail is driven into the ALC, the pressure applied to the wedge at the tip of the leg by compressing the ALC breaks the connecting portion that previously connected the leg, and the two legs are connected to the side surfaces of the wedge. Then, the mounting member is fixed to the ALC with the head by the legs being opened in the ALC.

[0004] As described above, the conventional open leg nails for ALC are:
The leg was opened by the pressure received by compressing the ALC, and the mounting member was fixed with an improvement in pullout resistance.

[0005]

A structure in which the leg is opened by relying on the pressure received by compressing the ALC, as in the above-described conventional ALC leg nail, is called ALC.
The hardness varies depending on the manufacturer, wet and dry conditions, and yearly changes.
If the ALC is too hard, the joints of the legs are cut almost simultaneously with the driving, and the legs are driven with the legs opened from the initial stage of the driving to form a cavity in the ALC. In some cases, no attraction can be obtained.

In the case of soft ALC, sufficient pressure is not applied to the wedge at the tip of the leg, the connecting portion connecting the leg does not break, and the leg enters the ALC straight, and the leg is opened. However, there is a problem that sufficient pull-out strength cannot be obtained.

In view of the above, an object of the present invention is to provide an open leg nail for ALC which can always obtain a stable pull-out strength regardless of a change in the hardness of the ALC in order to solve the above problems. .

[0008]

In order to solve the above-mentioned problems, a first aspect of the present invention is to solve the above-mentioned problem by providing the plate in the axial direction of the leg.
This configuration adopts a configuration in which a projection for supporting a washer is provided on the outer periphery of the head on the head side side of the upper end of the body .

[0009] The second invention is characterized in that the front part of the leg portion is located halfway in the axial direction.
Adopted a configuration in which the tip side from the part at the head side position than the upper end of the writing plate is smaller than the leg diameter on the head side, and a step that supports the washer is formed at the boundary between the tip side and the head side It was done.

According to a third aspect of the present invention , the front part of the leg part is
A configuration in which the tip side from the head side position to the tip side from the upper end of the plate-like body is partially smaller than the leg diameter of the head, and a step that supports the washer is formed at a part where the leg diameter is different It is.

[0011] In a fourth aspect of the present invention , the front part of the leg portion is located halfway in the axial direction.
A recess is provided on the outer periphery of the head side position from the upper end of the writing plate ,
The configuration adopts a configuration in which the inner peripheral surface of the washer is fitted into the recess.

[0012]

When the split nail having the above structure is driven into the ALC, the wedge body is moved upward by the pressure received by the tip of the wedge sufficiently compressing the ALC, and the leg is to be opened. However, the upper end of the plate-like body of the open leg member stops on the lower surface of the fitting portion passed to the center portion of the washer, and the space from the tip of the leg portion to the washer is completely connected to the open nail member and the ALC. Until the washer is engaged, the washer engages with the protrusions, steps, and recesses provided on the outer periphery near the center of the leg in the axial direction, so that it is prevented from moving toward the head, and the leg is opened. But fully compresses the ALC at the wedge tip.

When the washer is further driven in contact with the mounting member, the engaging portion of the washer with the projection, step, concave portion, etc. is sheared, so that the washer can move freely with respect to the leg, and the leg has an inner side. It enters while closely contacting the side surface of the wedge body, and opens the leg in the ALC, thereby fixing the mounting member to the ALC.

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

The first embodiment shown in FIGS. 1 to 3 is of a type in which a washer is fixed to a leg by a projection provided on the leg.

As shown in FIG. 1, an open leg nail 1 has a head 2 at one end.
Is divided into leg pieces 3a, 3a by slits 4 provided so as to reach the head 2 along the axial direction from the distal end, and an inclined surface 5 with a widened distal end is formed on the inner surface on the distal side of both leg pieces 3a, 3a. ,
5 is formed by a combination of a nail main body 6 formed with a leg 5, a washer 7 which is externally fitted to the leg 3 so as to be movable in the axial direction, and a leg opening member 8 inserted into a tip portion between both leg pieces 3a, 3a. Have been.

As shown in FIG. 1D, the washer 7 is provided with a band-shaped fitting portion 9 fitted into the slit 4 on the inner periphery of an annular portion fitted on the leg portion 3. The leg member 8 is provided with a washer 7.
And a plate-like body 11 inserted into the leading end of the slit 4 is provided at the upper end of a wedge body 10 fitted between the opposed inclined surfaces 5 and 5.

In the middle of the leg 3 in the axial direction ,
On the outer periphery located closer to the head 2 than the upper end of the plate-shaped body 11, a projection 12 for locking the washer 7 inserted from the distal end side is provided.

In the case of the example shown in FIGS. 1C and 1D, the projection 12 is formed by partially projecting a square axis at a position close to the slit 4 on the outer peripheral surface of both leg pieces 3a and 3a.

In the example shown in FIG. 2, the projections 12 are separately provided at a plurality of circumferential positions on the outer peripheral surfaces of the two leg pieces 3a, 3a. Further, the example shown in FIG. 3 is provided with a flange-shaped projection 12 which is continuous in the circumferential direction of the outer peripheral surface of both leg pieces 3a, 3a.

The washer 7 inserted into the leg 3 is
The leg-spreading member 8 inserted between the distal ends of the leg pieces 3a, 3a in a state where the upper end of the plate-like body 11 is in contact with or close to the lower surface of the fitting portion 9 in a state where the leg pieces 3a, 3a are in contact with each other. I have.

The first embodiment of the present invention is constructed as described above. In the open leg nail 1, the washer 7 inserted into the leg 3 abuts and engages with the projection 12, and the leg pieces 3a, 3a The open leg member 8 inserted therebetween is in a set state in which the upper end of the plate-shaped body 11 is in contact with the lower surface of the fitting portion 9.

FIG. 4 shows the driving state of the open leg nail 1. First, as shown in FIG. 4A, the tip of the leg 3 is inserted into the lower hole 15 of the mounting member 14 superimposed on the surface of the ALC 13 and the ALC 13 is inserted into the ALC 13. When the nail 1 is driven inward, the tip of the leg 3 enters the ALC 13 and the leg member 8
The upper end of the plate 11 moves upward by the pressure received by sufficiently compressing the ALC 13 to open the legs. And the upper surface of the washer 7 is engaged with the projection 12, so that the leg member 8 does not move.
The legs 3a and 3a do not open until the portion from the tip to the washer 7 completely enters the mounting member 14 and the ALC 13. Therefore, the ALC 13 can be sufficiently compressed at the tip of the wedge body 10.

When the driving is further continued, the washer 7 comes into contact with the surface of the mounting member 14 and stops, while the leg 3 tries to enter. A part is sheared, and the leg 3 enters leaving the washer 7.

That is, when the lock of the washer 7 is released due to the shearing of the protrusion 12, the portion of the inner peripheral portion of the washer 7 that comes into contact with the protrusion 12 is scraped, and thus the lock of the washer 7 is released. Is caused by the combined condition of the shearing of the protrusion 12 and the scraping of the inner periphery of the washer 7.

When the leg 3 is further driven after the washer 7 stops, as shown in FIG. 4B, the leg pieces 3a and 3a enter the ALC 13 while closely contacting the side surfaces of the stopped wedge body. 3a and 3a enter with both legs open.

As shown in FIG. 4C, the head 2
Presses and fixes the mounting member 14 through the washer 7 and
a, 3a are opened on both sides in ALC13,
Sufficient pull-out strength is obtained.

Next, a second embodiment shown in FIGS. 5 to 7 shows an example in which the washer is locked by a step provided on the outer periphery of the shaft. The same parts as those in the first embodiment shown in FIGS. 1 to 4 are denoted by the same reference numerals, and description thereof will be omitted. The same applies to the following embodiments.

The example shown in FIG.
a, the head of the plate-like body being higher than the upper end thereof in the axial direction of 3a
The outer diameter at the tip end side from the side position portion is made smaller than the outer diameter at the head side, and a step 16 for supporting the washer 7 is formed at the end at the head side due to the difference in the outer diameter.

As shown in FIG. 5C, the inner diameter of the washer 7 is formed so as to just fit on the small diameter side of the leg 3, and the upper surface of the washer 7 inserted into the leg 3 from the tip side has a stepped portion 16. Will be locked at the position where it abuts.

In the example shown in FIGS. 6 and 7, a plurality of ridges 17 extending in the axial direction are provided on the outer peripheral surface of both leg pieces 3a, 3a of the leg 3 from the vicinity of the center in the axial direction to the outer peripheral surface on the head 2 side. By projecting and partially increasing the outer diameter of the head side, each ridge 1
A step 16 for supporting the washer 7 is formed at an end of the step 7.

FIG. 6 shows protrusions 17 provided on the outer surfaces of both leg pieces 3a and 3a on both sides adjacent to slit 4, and FIG. A ridge 17 is provided at each position. In each of these examples, the inner diameter of the washer 7 is adapted to be fitted to the distal end side of the leg 3 exactly, and is supported by each step 16.

In the open leg nail 1 in the second embodiment,
The opening of the leg pieces 3a, 3a by the driving into the ALC is suppressed by locking the washer 7 in contact with the stepped portion 16, and the opening of the leg is started by the inner periphery of the washer 7 by the ridge 17. Is performed by shearing.

The third embodiment shown in FIGS.
The plate-like body in the middle of both leg pieces 3a, 3a of the axial direction of
In this type, the front end side from the position on the head side of the upper end is partially smaller in diameter than the outer diameter on the head side, and the washer 7 is locked at a step formed by the small diameter portion.

The example shown in Figure 8, leg pieces 3a, axial 3a
From the position on the head 2 side of the upper end of the plate-like body 11
On either side of the portion adjacent to the slit 4 at the end side, it provided a long flat recess 18 of the axial direction, leg 3 by the recesses 18
The outside diameters of a and 3a are made smaller than the other parts.

The inner diameter of the washer 7 to be externally inserted into the leg 3 is
As shown in FIG. 8C, the leg pieces 3a, 3a have a shape that just fits the portion where the concave portion 18 is provided. Therefore, the washer 7 is positioned at both ends of the fitting portion 9 on the inner periphery thereof. Is formed, and the washer 7 is engaged in the middle of the leg 3 by the projection 19 being in contact with the step 16 provided at the upper end of the flat recess 18. become.

In the example shown in FIG. 9, the outer shape from the middle to the end of the two leg pieces 3a, 3a is formed into three polygonal surfaces, and a step 16 is provided at the upper end of each surface, and the inner diameter of the washer 7 is set to a polygonal surface. The washer 7 is locked to the leg 3 by engaging the inward projection 19 formed by the linear edge of the polygon with the step 16.

The open leg nail 1 according to the third embodiment has the above-described structure, and has legs 3a, 3a formed by driving into the ALC.
Is restrained by the engagement of the projection 19 of the washer 7 with the stepped portion 16, and the opening of the leg is started by the stepped portion 16.
The projection 19 of the washer 7 is sheared.

Next, a fourth embodiment shown in FIG. 10 shows a type in which a washer is locked in a concave portion provided on the outer peripheral surface of the leg pieces 3a, 3a . On the way
A concave portion 20 is provided partially along the circumferential direction on the outer peripheral surface at a position closer to the head than the upper end of the plate-like body, and the fitting portion 9 is sandwiched between the inner periphery of the washer 7 that is externally inserted into the leg 3. The structure is such that projections 19 that fit into the recesses 20 are provided at positions on both sides.

The width of the fitting portion 9 in the washer 7 is made smaller than the width of the slit 4, and when the washer 7 is externally inserted into the leg portion 3, the two leg pieces 3 a, 3 a are mutually connected by the projections 19 on both sides. At the position where the projection 19 faces the recess 20, the two leg pieces 3 a, 3 a are restored by their own elasticity,
Is externally fitted to the projection 19, whereby the washer 7 is locked to the leg 3.

In the open leg nail according to the fourth embodiment, the leg pieces 3a,
3a, and the start of the leg opening
By shearing the projection 19 of the washer 7 by the upper end step 16 of FIG.

In each embodiment, the leg piece 3
In the example shown in FIG. 11, the protrusions 12 and the steps 16 provided on the 3 a are locked by contacting the upper surface of the washer 7, but as shown in FIG. The portion where the portion 16 abuts may be made thin so that its upper surface is located lower than the upper surface of the washer 7.

In each embodiment, as shown in FIG. 12, a required number of sets of ridges are fitted to the inclined surface 5 of the two leg pieces 3a, 3a and the overlapping surface of the wedge body 10 of the open leg member 8. 2
1 and a concave groove 22 are provided along the axial direction of the leg 3,
a, the positioning and holding of the leg member 8 inserted between the members 3a in the radial direction may be performed, and the tip of the leg 3 and the tip of the side surface of the wedge body 10 are substantially equal. Although an arc-shaped pointed shape is shown, it may be formed at a linear pointed end. In addition, as shown in FIG.
Equal to the width W ₁ of the width W and the wedge member 10 of the plate-like body 11, a flat surface of large area tip surface of the wedge 10, so as to increase the pressure receiving area of the wedge 10 at the time of implantation of the ALC You may.

Furthermore, although the leg 3 in each embodiment has a shape in which the circular axis is bisected by a slit, a square cross-sectional shape may be adopted. Also, as shown in FIG.
Is extended on the head 2 via a small-diameter cut-out portion 23.
4 may be provided.

In each embodiment, as shown in FIG. 14, the fitting portion 9 of the washer 7 is entirely or partially protruded downward, and the upper end of the plate-like body 11 of the open leg member 8 is protruded. If the recess 25 is fitted to the portion, the leg 3a,
The positioning and holding of the plate-shaped body 11 inserted between 3a can be performed.

[0046]

As described above, according to the present invention, the washer is externally fitted and locked in the middle of the leg, and the washer is supported by the washer. Until the washer abuts against the mounting member and the lock is released, the leg is moved straight forward. After the lock is released, the leg is opened, so that the leg is reliably opened in the ALC. Therefore, sufficient pull-out strength can be obtained.

Further, since the legs are opened after a certain amount of driving, the same open state can be obtained for all ALCs whose hardness is not constant due to the manufacturer, the degree of wet / dry, and the secular change. These ALCs always perform a constant leg-opening action to obtain maximum pull-out strength,
There is an effect that the construction can be performed safely and securely.

Further, since the nail body only has a slit in the leg, mass production is possible at low cost by casting or pressing.

[Brief description of the drawings]

1A is a front view of an open leg nail according to the present invention, B is a cutaway side view of the same part, C is a cross sectional view taken along the arrow aa of B, D
Is an exploded perspective view showing a main part of the above.

2A is a front view showing another example of the above, FIG. 2B is a side view of the same cutaway, FIG. 2C is a cross-sectional view along the arrow bb of B, and FIG. Figure

3A is a front view showing another example, FIG. 3B is a cutaway side view of the same part, and FIG. 3C is a cross-sectional view taken along arrow cc of FIG.

FIGS. 4A, 4B, and 4C are explanatory diagrams showing the order of the driving step of the open nail.

5A is a front view showing a second embodiment of the open-ended nail, FIG. 5B is a partially cutaway side view of the same, FIG. 5C is a cross-sectional view taken along the arrow d-d of FIG. Figure

6A is a front view showing another example of the above, FIG. 6B is a side view of the same, FIG. 6C is a cross-sectional view along the arrow ee of B, and FIG.

7A is a front view showing another example, FIG. 7B is a cutaway side view of the same part, and FIG. 7C is a cross-sectional view taken along the arrow ff of FIG.

8A is a front view showing the third embodiment, FIG. 8B is a cutaway side view of the same part, FIG. 8C is a cross-sectional view taken along the arrow gg of FIG.

9A is a front view showing another example of the above, FIG. 9B is a cutaway side view of the same part, FIG. 9C is a cross-sectional view taken along the arrow hh of B, and FIG.

10A is a front view showing the fourth embodiment, FIG. 10B is a cutaway side view of the same part, FIG. 10C is a cross-sectional view taken along the arrow ii of B, and FIG.

FIG. 11 is an exploded perspective view showing another example of a protrusion provided on a washer.

FIG. 12 is an exploded perspective view showing a relationship between a leg and a leg opening member.

FIG. 13 is a perspective view showing a different example of a wedge body.

FIG. 14 is an explanatory view showing a coupling structure between a washer and a plate-like body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Opening nail 2 Head 3 Leg 4 Slit 5 Slope 6 Nail main body 7 Washer 8 Opening member 9 Fitting part 10 Wedge body 11 Plate-shaped body 12 Projection 16 Step 17 Projection 19 Projection

Claims (4)

(57) [Claims] An end has a head, and has a plurality of divided legs formed by slits provided along the axial direction from the distal end. And a washer which is fitted externally to the leg so as to be movable in the axial direction and has a fitting portion to the slit, and a wedge body formed separately from the washer and fitted between the inclined surfaces. An open leg member provided with a plate-like body inserted into the tip end side of the slit at the upper end of the leg, the head being located at a position closer to the head than the upper end of the plate-like body in the axial direction of the leg.
An open leg nail characterized in that a projection for supporting a washer is provided on the outer periphery of the device. 2. A head having a head at one end , a plurality of split legs formed by slits provided along the axial direction from the front end, and an inclined surface having a widened front end is formed on the inner surface on the front end side of each leg. And a washer which is fitted externally to the leg so as to be movable in the axial direction and has a fitting portion to the slit, and a wedge body formed separately from the washer and fitted between the inclined surfaces. An open leg nail comprising a plate-like member provided at the upper end of the slit with a plate-like body to be inserted on the tip end side of the slit, the middle of the leg near the axial center of the leg ,
An open leg nail characterized in that the front end side is smaller in diameter than the head side leg diameter from the head side position portion , and a step is formed at the boundary between the front end side and the head side to support a washer. 3. A head having an end portion, a plurality of leg portions divided by slits provided along the axial direction from the tip end, and an inclined surface having a divergent tip end is formed on the inner surface on the tip end side of each leg portion. And a washer which is fitted externally to the leg so as to be movable in the axial direction and has a fitting portion to the slit, and a wedge body formed separately from the washer and fitted between the inclined surfaces. An open leg member provided with a plate-like body inserted into the tip end side of the slit at the upper end of the leg, the head being located at a position closer to the head than the upper end of the plate-like body in the axial direction of the leg.
From the installation, the tip side is partially smaller than the leg diameter of the head,
A step nail for supporting a washer in a portion having a different leg diameter. 4. A head having an end at one end , a plurality of divided legs formed by slits provided along the axial direction from the distal end, and an inclined surface having a widened distal end is formed on the inner surface on the distal end side of each leg. And a washer which is fitted externally to the leg so as to be movable in the axial direction and has a fitting portion to the slit, and a wedge body formed separately from the washer and fitted between the inclined surfaces. An open leg nail comprising a plate-shaped member provided at the upper end of the slit and having a plate-like body inserted into the distal end side of the slit , wherein the head is located at a position closer to the head than the upper end of the plate-like body in the axial direction of the leg.
A recess provided on the outer periphery of location, open leg nails, characterized in that fitted to the inner peripheral surface of the washer in the recess.