JP2001124030A - Concrete nail - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a concrete nail favorable for mounting a metal fixture, etc., to near the cement mortar layer of a concrete product such as a concrete foundation. SOLUTION: The concrete nail comprises a shank 11 and a head 12, wherein the shank 11 has a diameter of 1.5-3.0 mm and a length in axial direction of 20 mm or more and is formed columnar with the tip 111 pointed. The head 12 has one surface bulges high toward the center and a tip 123 formed in a rounded cone, wherein the length in the axial direction should range between 2-6 mm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete nail used for mounting a fitting for a concrete product. In particular, the present invention relates to a concrete nail suitable for use when attaching a fitting for attaching a member such as an enlarged beam to a concrete foundation.

[0002]

2. Description of the Related Art Conventionally, when mounting members such as beams on a concrete foundation, anchor bolts are embedded in the concrete foundation, and columns and beams placed on the concrete foundation are fixed and attached with the anchor bolts. However, the position of the anchor bolt is easily moved until the concrete hardens, and therefore, it is often difficult to attach a column, a beam, or the like to a predetermined position with the anchor bolt, and it has been necessary to prevent the anchor bolt from moving.

[0003] As a means for solving such a problem, when a member such as a beam, which is relatively free from stress, is attached to a concrete foundation, an attachment is attached to a concrete product with an adhesive and a concrete nail, and is attached to the attachment. A member such as a beam is attached with a screw or the like.

When such a mounting bracket is used, it is possible to mount the mounting bracket at a predetermined position after the concrete foundation is hardened. As a result, a beam or the like is accurately placed and mounted at the predetermined position on the mounting bracket. You can do it. And since concrete products are hard and it is difficult to drive nails or the like, the diameter of the shaft of the concrete nail used when attaching this mounting bracket is usually 3.1 to 3.6 mm.
I'm using

In addition, when the mounting member is moved when the concrete nail is driven, it is difficult to mount the mounting member at a predetermined position. In many cases, the mounting member is temporarily fixed and the mounting position is determined. The member is fixed to a concrete foundation or the like using an adhesive or the like and a concrete nail.
On the other hand, in this concrete foundation and the like, a cement mortar layer is provided on the surface to improve the appearance and make the upper surface horizontal.

[0006]

However, as described above, when a mounting bracket is mounted on a concrete foundation, it may not be possible to mount the mounting bracket properly using a conventional concrete nail. That is, the mounting bracket attached to the concrete foundation usually comprises a main body having substantially the same width as that of the concrete foundation, and holding pieces provided on both sides of the main body. Place the main body on the concrete foundation with the holding pieces sandwiching both sides of the concrete foundation, drive the concrete nails through the through holes provided in the holding pieces into the concrete foundation, and attach the mounting bracket to the concrete foundation ing.

[0007] Then, the length of the holding piece is not so long, and there is a cement mortar layer on the upper layer of this concrete foundation to make the surface beautiful or horizontal, so that the concrete nail driven into the concrete foundation is not necessary. , Which is driven slightly below the cement mortar layer.

[0008] When the concrete nail is driven into the vicinity of the cement mortar layer as described above, a force to lift the cement mortar layer is applied. As a result, there arises a problem that the cement mortar layer, whose mechanical strength is weaker than that of concrete, is peeled off or a crack is formed in the cement mortar layer, and the mounting bracket cannot be firmly attached to the concrete foundation. Then, an object of the present invention is to provide a concrete nail suitable for use when attaching a fitting or the like near a cement mortar layer of a concrete product such as a concrete foundation.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and the invention according to claim 1 has a diameter of 1.5 mm to 3.0 mm and an axial length. 2
A cylindrical shaft with a point of 0 mm or more and a pointed tip, and a head with a circular shape with one end of the disk rising to the center and a rounded tip with an axial length of 2 to 6 mm And the end face on the base side of the shaft portion and the face on the opposite side of the head are integrally formed.

The shaft of the concrete nail according to the first aspect of the present invention has a diameter of 1.5 mm to 3.0 mm,
Although the length in the axial direction is 20 mm or more, preferably, the diameter is 2 mm to 3 mm, and the length in the axial direction is 20 mm to 30 m.
m, more preferably about 2.6 mm in diameter and about 25 mm in axial length. In addition, the axial length of the head is 2
６6 mm, but preferably 3-5 mm, more preferably approximately 4 mm.

According to a second aspect of the present invention, there is provided the concrete nail according to the first aspect, wherein the material of the shaft portion is a chrome molybdenum steel.

In the second aspect of the invention, the material of the shaft is chromium molybdenum steel, but the material of the head may be any suitable. For example, the material of the head may be steel or chromium molybdenum steel. However, usually, the shaft portion and the head portion are often manufactured by processing the same wire material, and therefore, it is preferable that both are made of chromium molybdenum steel.

[Operation] The diameter of the shaft portion is 3.1 to 3.6 mm.
When the conventional concrete nail is driven into the cement mortar layer provided on the surface of the concrete foundation, the cement mortar layer peels or cracks as a result of being largely lifted outward, but in the invention according to claim 1, Since the diameter of the shaft portion is as small as 1.5 mm to 3.0 mm, the force for floating above the cement mortar layer is weak, and the cement mortar layer does not peel off and does not crack.

Further, since the shaft has a cylindrical shape with a length of at least 20 mm in the axial direction and a sharp tip, hold the shaft of the nail with a finger and hit the head of the concrete nail with a hammer to concrete. When a nail is driven into a concrete product such as a concrete foundation, the finger having the shaft does not protrude from the head. Therefore, the finger having the shaft is not hit with a hammer.

In addition, since the head of a conventional concrete nail has a disk shape, if the hammering face is slanted and the head is hit,
Although the disk-shaped edge was hit, the head was strongly pushed in the lateral direction and the shaft was easy to bend. However, in the invention according to claim 1, as the head moves toward one side of the disk toward the center, It is a raised cone, the tip of which is rounded and conical, and the end face on the root side of this shaft and the face on the opposite side of the head are integrated, so if the tip of the shaft is turned to the concrete foundation, The tip with one side of the part raised faces the opposite side. Therefore,
Even if you hit the head of a concrete nail from above with the hammer striking surface slightly slanted, you will hit the raised tip of the head, and the impact will work in the direction of the center axis of the nail, Does not bend. Therefore, the head can be hammered in with a hammer with confidence.

Further, since the lateral length of the head of a conventional concrete nail is approximately 1 mm, an adhesive is applied to the back surface in order to bond the mounting bracket with an adhesive, and the mounting bracket is mounted on a concrete foundation. When pressed against, the adhesive is pushed out from the nail hole of the mounting bracket, but the head of the concrete nail is buried in the extruded adhesive, and it was difficult to hit the head of the concrete nail with a hammer and hit it all the way, According to the first aspect of the present invention, since the length of the head in the axial direction is 2 to 6 mm, the head is not buried in the adhesive extruded from the mounting bracket. Therefore, it is possible to hit the head with a hammer and hit it to the end.

According to the second aspect of the present invention, since the material of the shaft portion is chromium molybdenum steel, the mechanical strength is large, and even if the diameter of the shaft portion of the concrete nail is as thin as 1.5 to 3.0 mm, The part does not bend. Therefore, it can be driven into a concrete product such as a concrete foundation.

[0018]

Next, embodiments of the present invention will be described with reference to examples. (Embodiment 1) FIGS. 1 to 4 show one embodiment of mounting a beam in a direction perpendicular to a concrete foundation using the concrete nail of the present invention, and FIG. 1 (a) is a side view showing the concrete nail. 2 (b) is a plan view of FIG. 2 (a), FIG. 2 is a perspective view showing a mounting bracket, FIG. 3 shows a procedure for mounting the mounting bracket on a concrete foundation, and FIG. (B) is a perspective view showing a state in which the mounting bracket is attached to the concrete foundation, (c) is a front view of a portion A in (b), and FIG. 4 is FIG.
It is sectional drawing in the BB line of (b).

1 to 4, reference numeral 1 denotes a concrete nail made of chromium molybdenum steel.
Is composed of a shaft 11 and a head 12, as shown in FIG. The shaft portion 11 has a diameter of approximately 2.6 mm, a length of approximately 25 mm in the axial direction, and a columnar shape with a sharp tip 111.

The head 12 is composed of a disk-shaped disk portion 121 having a diameter of approximately 5 mm, and a conical tip portion 122 having a rounded tip 123 with a swelling height rising toward one center of the disk portion 121. The axial length of the distal end portion 122 is approximately 2.5 mm, and the axial length of the disk portion 121 is approximately 1.5 mm. Therefore, this head 12
Is approximately 4 mm in the axial direction. The concrete nail 1 has an end face on the root side of the shaft portion 11 and the other surface of the disk portion 121 of the head portion 12 integrated with each other.

Reference numeral 2 denotes a concrete foundation having a width of approximately 170 mm. As shown in FIG. 4, the concrete foundation 2 has a concrete main body 21 and a beautiful upper surface of the concrete 21. And a cement mortar layer 22 provided to provide a horizontal surface.

3 is a beam having a width of about 75 mm.
This is indicated by the dotted line (b). Reference numeral 4 denotes a mounting bracket. As shown in FIG. 2, the mounting bracket 4 includes two plate-shaped main bodies 41, 41 and holding pieces 42, 42 connecting both ends of the two main bodies 41, 41. And the beam mounting piece 4 erected on the main body 41
3 The main body 41 is a plate-like body having a width of approximately 25 mm and a length of approximately 170 mm (substantially the same length as the width of the concrete foundation 2), and the two main bodies 41, 41 are approximately 75.5 mm (of the beam 3). (The length is almost the same as the width).

The holding piece 42 connects both sides of the two main bodies 41, 41, and the holding piece 42 hangs substantially perpendicularly from the main body 41. The distance between the two holding pieces 42, 42 suspended from both sides of the main body 41 is substantially one.
70 mm, which is almost the same length as the width of the concrete foundation 2. Accordingly, as shown in FIG. 3B, when the concrete foundation 2 is pressed on the concrete foundation 2, the concrete foundation 2 can be sandwiched between the two holding pieces 42.

The two holding pieces 42 are provided with two through holes 425 each having a diameter of about 3 mm. At the approximate center of the holding piece 42, a positioning notch 423 cut in a substantially triangular shape is provided.
The beam mounting piece 43 is a vertical piece 43 erected on the inner edge of the main body 41.
1 and an L-shaped short piece composed of a horizontal piece 432 extending in a state where the vertical piece 431 is bent at a substantially right angle. A total of four beam mounting pieces 43 are provided at positions separated by approximately 75.5 mm (substantially the same length as the width of the beam 3).

As described above, the two main bodies 41 are approximately 75.
Since they are separated by 5 mm, the beam 3 can be inserted between the vertical pieces 431 erected on the inner edges of the two main bodies 41 as shown in FIG. .
Further, since the horizontal pieces 432 are also erected at a distance of approximately 75.5 mm, the beam 3 can be inserted between the two horizontal pieces 432 and 432 as shown in a second embodiment described later. It has become. The vertical piece 431 and the horizontal piece 432 are each provided with two through holes 435. 5 is an adhesive.

Next, a description will be given of a construction method and an operation of attaching a beam to a concrete foundation using the concrete nail. First, as shown in FIG. 3A, the adhesive 5 is applied to the back side of the main body 41 of the mounting bracket 4. In addition, when the mounting bracket 4 is pressed against the concrete foundation 2, the applied adhesive 3 does not protrude much on both sides of the main body 41,
It is important that the coating amount is appropriate.

Next, as shown in FIG. 3 (b), the mounting bracket 4 is pressed against the upper surface of the concrete foundation 2, and both sides of the concrete foundation 2 are sandwiched by the holding pieces 42 on both sides. And
As shown in FIG. 3C, the mounting bracket 4 is attached to a predetermined position by aligning the positioning notch 423 provided on the main body 41 with the reference line 25 provided on the concrete foundation 2. Note that the mounting operation of the mounting bracket 4 needs to be performed quickly and completed before the adhesive 5 is completely solidified so that the adhesive 5 can be adjusted to the reference line.

After that, hold the shaft portion 11 with the finger of one hand,
The holding piece 42 holds the tip 111 of the shaft 11 of the concrete nail 1.
Of the concrete nail 1 is hit into the concrete foundation 2 by holding the hammer with the other hand and hitting the head 12 of the concrete nail 1 with the hammer. Then, since the material of the concrete nail 1 is chromium molybdenum steel, it can be driven into the concrete foundation 2 without bending even if the diameter of the shaft portion of the concrete nail 1 is as thin as about 2.6 mm.

Also, since the diameter of the shaft portion 11 is as thin as about 2.6 mm, as shown in FIG. 4, even if the concrete nail 1 is driven into the vicinity of the cement mortar layer 22 of the concrete foundation 2, the cement mortar layer The force for floating above the top 22 is weak, and the cement mortar layer 22 does not peel off and does not crack. The axial length of the shaft 11 of the concrete nail 1 is approximately 25 mm.
Since the tip 111 has a pointed cylindrical shape, the finger holding the shaft 11 of the concrete nail 1 with a hammer while holding the shaft 11 of the concrete nail 1 with a finger, It does not protrude from the part 12. Accordingly, the finger holding the shaft 11 of the concrete nail 1 is not hit with a hammer.

The head 12 rises in height as one surface of the disk moves toward the center, and the tip 123 has a rounded conical shape. Since the surface is formed integrally, when the tip 111 of the shaft portion 11 is turned to the concrete foundation, the tip 123 on which one surface of the head 12 is raised faces the opposite side. Therefore,
Even if the tip of the head 12 that rises higher as it goes to the center is hit from above with the hammer striking surface slightly inclined, the tip 123 of the head 12 that rises higher will be hit, and this hit will be performed. The impact acts in the direction of the center axis of the nail 1, and the shaft portion 11 does not bend. Therefore, the head 12
With a hammer.

When the mounting bracket 4 is pressed against the concrete foundation 2, the adhesive 5 applied to the back surface of the main body 41 slightly comes out of the nail hole, but the axial length of the head 12 is as long as 4 mm. The head 12 is not buried in the adhesive 5, so that the head 12 can be hit with a hammer to the end. After the mounting bracket 4 is mounted on the concrete foundation 2 in this manner, the beam 3 is mounted in a direction orthogonal to the concrete foundation 2 as shown by a dotted line in FIG. Then, a screw is screwed into the beam 3 from the through hole 435 to fix the beam 3 to the mounting bracket 4.

Then, as shown in FIG. 3B, between the vertical pieces 431 erected on the inner edges of the two main bodies 41,
Can be inserted, and 2 provided on the vertical piece 431 can be inserted.
The beam 3 can be firmly fixed by screws screwed into the beam 3 through the individual through holes 435.

(Embodiment 2) FIG. 5 shows another embodiment in which a beam is installed along a concrete foundation using the concrete nail of the present invention, in which a mounting bracket is attached to a concrete foundation. It is a perspective view.

When the embodiment 2 shown in FIG. 5 is compared with the embodiment shown in FIGS. 1 to 4, the method of mounting the beam 3a is different from the embodiment in that the column 6a is erected on the concrete foundation 2a.
Since the method of erecting the column 6a is the same as the conventional method, the description is omitted, and the method of attaching the beam 3a is described. First, the mounting bracket 4a is connected to the concrete nail 1a as in the first embodiment.
Is mounted on the upper surface of the concrete foundation 2a. The operation at this time is the same as that of the first embodiment, and will not be described.

Next, the beam 3a is placed on the concrete foundation 2a along the concrete foundation 2a. Then, since the horizontal piece 432a is erected on the mounting bracket 4a at a position approximately 75.5 mm apart from the inner edges of the two main bodies 41, the beam 3a is inserted between the erected horizontal pieces 432a. Can be inserted.

Next, a screw is screwed into the beam 3a through two through holes 435a provided in the horizontal piece 432a,
Attach. Thus, the concrete foundation 2a
Along with the beam 3a.

[0037]

As described in detail above, according to the first aspect of the present invention, since the diameter of the shaft portion is as small as 1.5 mm to 3.0 mm, even if the shaft portion is driven into the vicinity of the cement mortar layer, the shaft portion is located above the cement mortar layer. Is weak in trying to emerge
The cement mortar layer does not peel off and does not crack. Therefore, the mounting bracket and the like can be firmly attached to the concrete foundation. In addition, since the length of the nail in the axial direction is 20 mm or more and the tip is a cylindrical shape, when holding the nail portion of this nail with a finger and hammering the head of the concrete nail with a hammer, hit the finger with a hammer. Nothing.

The head has a conical shape with one end of the disk rising toward the center and a rounded tip at the center, and the concrete nail is provided at the end face on the root side of the shaft and on the opposite side of the head. Since the surface and the surface are integrated, the tip of the shaft is directed at the concrete foundation, and the head is hit with a hammer slightly slanting on the surface where the hammer is struck. That is, the shaft does not bend. Therefore, the head can be hammered in with a hammer.

Further, since the length of the head in the axial direction is 2 to 6 mm, the head does not become buried in the adhesive even if the mounting bracket is bonded with an adhesive. Until this head can be hit with a hammer.

According to the second aspect of the present invention, since the material of the concrete nail is chromium molybdenum steel, even if the diameter of the shaft of the concrete nail is as thin as 1.5 to 3.0 mm, it does not bend and does not bend the concrete nail. Can be driven into concrete products.

[Brief description of the drawings]

FIG. 1 shows an embodiment of attaching a beam in a direction perpendicular to a concrete foundation using the concrete nail of the present invention, wherein (a) is a side view showing a concrete nail, and (b) is a side view showing the concrete nail.
3 is a plan view of FIG.

FIG. 2 is a perspective view showing a mounting bracket.

FIG. 3 shows a procedure for attaching a mounting bracket to a concrete foundation, wherein (a) is a perspective view showing a state in which an adhesive is applied to a fixing bracket, and (b) is a mounting bracket attached to the concrete foundation. FIG. 3C is a perspective view showing the state, and FIG. 3C is a front view of part A of FIG.

FIG. 4 is a cross-sectional view taken along line BB of FIG.

FIG. 5 is a perspective view showing another embodiment of attaching a beam along a concrete foundation using the concrete nail of the present invention, and showing a state in which a mounting bracket is attached to the concrete foundation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1a Concrete nail 11 Shaft 12 Head 2, 2a Concrete foundation 22 Mortar layer 3, 3a Beam 4, 4a Mounting bracket 5 Adhesive

Claims (2)

[Claims] A cylindrical shaft having a diameter of 1.5 mm to 3.0 mm, an axial length of 20 mm or more, and a sharp tip;
As one side of the disk goes to the center, it rises high,
Conical shape with rounded tip, axial length 2-6
A concrete nail, comprising a head having a length of 1 mm and an end face on the root side of the shaft portion and a face on the opposite side of the head are integrally formed. 2. The concrete nail according to claim 1, wherein the material of the shaft is chromium molybdenum steel.