JP2549710Y2 - Anchor piece - 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 leg type anchor piece which is driven and fixed to lightweight cellular concrete (ALC).

[0002]

2. Description of the Related Art When fixing lightweight cellular concrete with bolts or attaching other members to the cellular concrete with bolts, an anchor piece that has female threads and that can be secured by opening the legs by driving into cellular concrete is used. Can be

As shown in FIG. 4, a conventional anchor piece 1 has a pair of metal plates 3 having a tapered portion 2 on one surface of one end.
3 are overlapped so that the tapered portions 2 and 2 face each other, and a nut 5 having a female screw 4 is welded and fixed to the other end side of the two metal plates 3 and 3 to form a structure in which the two metal plates 3 and 3 are joined by this welding. As shown in FIG. 5, by hitting the nut 5 and driving both metal plates 3 and 3 into the cellular concrete A, the metal plates 3 and 3 are opened on both sides at the tapered portions 2 and 2. And pull-out resistance.

[0004]

However, in the above-mentioned conventional anchor piece 1, since the maximum diameter a of the nut 5 is large, as shown in FIG.
There is an inconvenience that the pilot hole 6 must be made in advance with a drill or the like in order to make the embedded shape.

Since the nut 5 is fixed to the metal plates 3 by fitting the lower notch of the nut 5 to the metal plates 3, the base of the legs of the metal plates 3 is set to the nut 5.
In this case, the length of the openable leg b of the metal plates 3 and 3 becomes short, and there is a problem that the pull-out resistance is correspondingly low.

Therefore, an object of the present invention is to provide an anchor piece which can be buried in a cellular concrete in its entire length without drilling a pilot hole, and which has a longer leg-openable portion to improve pull-out resistance. Is to do.

[0007]

In order to solve the above problems, the present invention has a tapered portion on one surface of one end,
On the other end side, a pair of metal plates having a semi-cylindrical recessed part integrally provided on the same surface as the tapered part, the recessed part of each other and the tapered part
The recesses are formed between the opposing surfaces of the pair of metal plates such that the opposing faces face each other, and the opposing recesses are opened between the other ends.
Lay the plate pieces on both sides of the opening
Together, these two metal plates are connected to each other at the other end,
In this configuration, a female screw is formed on the inner peripheral surface of the recessed portion of each of the metal plates and on the leading edge of the plate piece.

[0008]

[Function] The recessed portion having the female screw formed on the inner peripheral surface can be formed by bending a part of the metal plate into a semi-cylindrical shape.
Since the outer diameter is small, the entire length can be buried in the aerated concrete without preparing a pilot hole, and the length of the openable part of both metal plates can be set long, so that the legs are sufficiently open and resistant. The pullout strength is improved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

[0010] As shown in the figure, the anchor piece 11 is formed by combining two vertically long rectangular metal plates 12 and 12 so as to face each other.

Each of the metal plates 12 and 12 has a tapered portion 13 on one surface of one end over the entire length in the width direction, and a semi-cylindrical recessed portion 14 at the center of the other end in the width direction on the same surface as the tapered portion 13. The plate piece 15 provided and extended to one side edge of the other end is folded back on the side of the metal plate 12 where the tapered portion 13 is provided, and is overlapped.
Further, at a position close to the plate piece 15 on one side edge, there is provided a side plate 16 which is bent at a right angle to the surface on which the tapered portion 13 is formed.

The recess 14 is formed by pressing a portion between the other end of the metal plate 12 and the elongated hole 17 provided inside the metal plate 12 into a semi-cylindrical shape by a press. The side plate 16 faces the opening edge of the inner peripheral surface of the portion 14, and the lower edge of the side plate 16 is an inclined edge rising from the root of the metal plate 12 to the tip.

The pair of metal plates 12, 12 are shown in FIGS.
As shown in (a), the surfaces provided with the tapered portions 13 face each other,
In a state where the inner surface of the side plate 16 is in contact with the side edge of the mating metal plate 12, the other end overlaps via the plate pieces 15 and 15, and the one end side is overlapped so that the tapered portions 13 and 13 face and overlap, The two metal plates 12, 12 are connected and fixed to each other at the other end.

The connection between the two metal plates 12 and 12 may be performed by welding, bonding, pressing, caulking, or the like at the overlapping portion via the plate pieces 15 near the other end. The recesses 14, 14 provided in 12 face each other to form a cylindrical portion 18, and the leading edges of both plate pieces 15, 15 form a part of the inner peripheral surface of the cylindrical portion 18, A female screw 19 is provided on the inner peripheral surface of the cylindrical portion 18.

In the case shown, the plate 15 is a metal plate 12.
In this way, the number of parts is reduced and the number of processing steps can be reduced. In the case of joining by spot welding, more reliable connection between the plate 15 and the metal plate 12 is achieved. Although it is possible to achieve a proper welding, a member formed separately from the metal plate may be interposed between the metal plates.

In the anchor piece 11 of the present invention,
When the female screw 19 is formed on the inner peripheral surface of the cylindrical portion 18 with a tap, a pushing force is applied to both the recesses 14, 14, but as shown in FIG. 2B, two metal plates 12, 12 are formed. When the tap 21 is made on the cylindrical portion 18 formed by directly overlapping and joining the metal plates 12, a force for separating the two metal plates 12, 12 acts as shown by arrows in FIG.
Due to the escape of 2, the internal thread cannot be formed reliably.

On the other hand, the anchor piece 11 according to the present invention has the plate pieces 15,
15 are located, and both plate pieces 15, 15 are the metal plate 1.
Since it is fixed between the two metal plates 12, 12, even if a pushing-spreading force acts, it does not act as a force for separating the two metal plates 12, 12, and the two metal plates 12, 12 do not spread. The plate pieces 15, 15 reinforce the cylindrical portion 18 and prevent the depressions 14, 14 from expanding, whereby the female screw 19 can be reliably formed on the inner peripheral surface of the cylindrical portion 18.

The female screw 19 is formed over the inner peripheral surfaces of the recesses 14 and 14 and the leading edges of both plate pieces 15 and 15.

The anchor piece 11 of the present invention has the above-described structure. When the anchor piece 11 is driven into the cellular concrete A, the two metal plates 1 entering the cellular concrete A are formed.
The legs 2 and 12 are opened on both sides by the guidance of the tapered portions 13 and 13 formed at the tips, and are driven until the cylindrical portion 18 sinks into the surface of the cellular concrete A as shown in FIG.

The cylindrical portion 18 of the anchor piece 11
Is formed by the concave portions 14, 14 in which a part of the metal plates 12, 12 is bent in a semi-cylindrical shape, so that the maximum outer diameter a ′ can be reduced. The concrete A can be submerged in the concrete A without making a preliminary hole.

Further, since the connection between the two metal plates 12, 12 can be set at a position close to the other end, the leg-openable portion b 'of the two metal plates 12, 12 in the anchor piece 11 can be set to be long. The leg opening amount and angle of the metal plates 12, 12 are increased, and the pull-out resistance can be improved.

The anchor piece 11 driven into the cellular concrete A is provided with pull-out strength by opening the two metal plates 12, 12, and the internal thread 19 of the cylindrical portion 18 of the anchor piece 11 fixed to the cellular concrete A The various members are attached to the cellular concrete A by screwing bolts or the like into the concrete.

[0023]

As described above, according to the present invention, a pair of metal plates having a tapered portion at one end and a semi-cylindrical recess at the other end are stacked with a plate piece interposed between the other ends. At the other end, a female screw is formed on the inner peripheral surface of the recess, so that the maximum outer diameter of the portion forming the female screw can be reduced. It is not necessary to open, and the labor of driving can be saved.

Further, since both sides in the leading edge of the plate pieces in the circumferential between recess is positioned, it is possible to improve the strength of the recess, the internal thread formed on the inner peripheral surface with no difficulty performed, the plate
Since the female screw is also formed at the tip edge of the piece, the screwing strength of the bolt to the female screw can be improved.

Furthermore, since the connection between the two metal plates can be set at a position near the other end, the length of the openable leg portion of the metal plate can be set long.
The amount of opening and angle of the metal plate are increased, and the pull-out strength can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of an anchor piece according to the present invention.

2 (a) is a plan view of the same, and FIG. 2 (b) is a cross-sectional view showing tapping when two metal plates are directly joined.

FIG. 3 is a sectional view showing the driving state of the above.

FIG. 4 is a perspective view showing a conventional anchor piece.

FIG. 5 is a sectional view showing the driving state of the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Anchor piece 12 Metal plate 13 Taper part 14 Depression part 15 Sheet piece 18 Cylindrical part 19 Female screw

Claims (1)

(57) [Scope of request for utility model registration] 1. A pair of metal plates having a tapered portion on one surface at one end and a semi-cylindrical recessed portion integrally provided on the same surface as the tapered portion on the other end side, wherein the pair of metal plates are mutually recessed and tapered. Comrades
Opposite so as to oppose each other , and a concave portion opening between the opposing surfaces of the pair of metal plates so that the opposing concave portion opens between the other ends.
And put the pieces on both sides of the
Both metal plates bonded to each other at the other end side, recess inner peripheral surface and an anchor piece formed with female screw on the leading edge of the plate pieces of the two metal plates.