JP3930921B2 - Fastener body - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
Since the present invention attaches equipment to concrete, blocks, ALC (foamed concrete), etc. with bolts or the like, it is inserted into a hole previously drilled with a drill or the like, or is directly driven into ALC and is expanded and fixed. It is related with the fastener body for forming.
[0002]
[Prior art]
In order to attach equipment to concrete or ALC with bolts, bolts cannot be screwed directly into concrete or ALC. Therefore, a fastener body is driven into a hole drilled in concrete or directly into ALC, and is expanded and fixed. Fixing equipment by screwing bolts into the body is performed.
[0003]
As a conventional ALC fastener body (anchor), a semi-cylindrical body is provided with a flange on one end side outer peripheral surface and a semi-cylindrical extension on the other end side, and a male screw threaded portion is formed on the inner peripheral surface of the semi-cylindrical part. It has been proposed to consist of a single pair of fasteners, and the two single pieces are converged with their positions shifted in the length direction.
[0004]
This fastener body is struck from the side of the buttock and driven into the ALC. When the other zip fastener is further driven while the buttock of the single fastener is in contact with the ALC, it is compatible with the extension of both zippers. Both extended parts are spread out on the opposite sides with correspondingly inclined surfaces, and this widened part provides pull-out strength and is fixed with bolts screwed into the threaded parts of both semi-cylindrical parts. Is to be fixed.
[0005]
[Problems to be solved by the invention]
By the way, the pull-out strength of the fastener body as described above is such that the portion expanded to the outside of the cross-sectional area of both extension portions serves as a fixing force. In the structure which expands in two opposite outer directions, there is a problem that the amount of contact with the ALC in the expanded portion is small and there is a limit to securing the pull-out strength.
[0006]
Therefore, an object of the present invention is to provide a fastener body that is expanded in three directions, greatly increases the contact area with ALC and the like, and can improve the pull-out strength.
[0007]
[Means for Solving the Problems]
In order to solve the above-described problems, the invention of claim 1 is provided with a flange portion on one end outer peripheral surface of the semi-cylindrical portion and an extension portion on the other end side, and a male screw threaded portion on the inner peripheral surface of the semi-cylindrical portion. The first fastener unit and the second fastener unit formed with a combination of the first fastener unit, an extension portion of the first fastener unit , provided on the surface facing the open surface of the semi-cylindrical unit, and thinned toward the tip side. A semiconical recess and a slit in the length direction dividing the extension into a plurality of portions are provided, and the extension of the second fastener unit is provided in the substantially semiconical recess provided in the first fastener unit. A wedge body is provided for expanding the extension portion divided by the slit of the first fastener unit in the opening direction of the first fastener unit by being accommodated and proceeding to the front end side in the recess . the second fastener alone, open face of each of the semi-cylindrical portion There overlap to face each other, in which one end of the second fastener itself from one end of the first fastener alone is adopted a structure in which converged in the state of projecting.
[0008]
The invention according to claim 2 is the invention according to claim 1, wherein the first fastener unit is such that the length direction of the extension portion is inclined toward the open surface side of the semi-cylindrical portion with respect to the semi-cylindrical portion. The second fastener is provided with a substantially semi-conical recess which is divided into two by a slit provided over the entire length in the length direction, and which is continuous with the inside of the semi-cylindrical portion and narrows toward the tip side on the surface facing the open surface of the semi-cylindrical portion. The single unit has an extension portion coupled to the semi-cylindrical portion in a substantially straight line, and a wedge body is provided on the surface of the extension portion that overlaps the first fastener unit, and the wedge body is a first fastener unit. The configuration in which both fasteners are converged with an annular object in a state of being accommodated in the semi-conical concave portion from the semi-cylindrical portion of the above.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0010]
As shown in the figure, the fastener body A is composed of a combination of a first fastener unit 1 and a second fastener unit 2 using various metals and hard synthetic resins, and the first fastener unit 1 is screwed with a bolt. A female thread which is formed with a flange 4 and an extension 5 on the other end of the semi-cylindrical portion 3 having a necessary length, and a bolt-engagement portion on the inner peripheral surface of the semi-cylindrical portion 3. 6 is provided.
[0011]
In addition, the second fastener unit 2 is also provided with a flange portion 8 on one end side outer peripheral surface of the semicylindrical portion 7 having the same length and inner and outer diameter as the semicylindrical portion 3 of the first fastener unit 1 and an extension portion on the other end side. 9 is formed, and a female screw 10 is provided on the inner peripheral surface of the semi-cylindrical portion 7.
[0012]
In the first fastener unit 1, the extension portion 5 has a half-cone shape in which the shape seen from a plane becomes narrower from the root portion continuous to the tip of the semi-cylindrical portion 3 toward the tip, as shown in FIG. When viewed from the side, it has substantially the same height from the root part to the tip part as shown in FIG. 1, and the extension part 5 has a flat surface facing the open surface of the semi-cylindrical part 3. A substantially semi-conical concave portion 11 that is continuous with the inside of the semi-cylindrical portion 3 and that narrows toward the tip end side is provided.
[0013]
This extension portion 5 is divided into two parts which are symmetrical on both sides by a slit 12 provided over the entire length in the length direction, and the extension portion 5 is inclined at an appropriate angle with respect to the open surface side of the semi-cylindrical portion 3. Further, a bending nosumi part 13 is provided on both sides of the upper surface of the root part connected to the semi-cylindrical part 3, and further, a small size for coupling the second fastener unit 2 to a position slightly on the tip side from the nosumi part 13. A protrusion 14 is provided.
[0014]
A plurality of circular flanges 15 are provided on the outer peripheral surface of the extension portion 5 to improve the pull-out strength at predetermined intervals in the length direction. The flange 15 is coaxial with the axis of the semi-cylindrical portion 3 and has a diameter equal to or slightly smaller than the outer diameter of the semi-cylindrical portion 3.
[0015]
Next, in the second fastener body 2, the extension portion 9 connected to the tip of the semi-cylindrical portion 7 is linearly connected with a semicircular outer shape equal to the outer shape of the semi-cylindrical portion 7. Bending portions 16 are provided on both sides of the boundary portion between the root portion and the tip of the semi-cylindrical portion 7.
[0016]
The total length of the second fastener unit 2 and the total length of the first fastener unit 1 described above are substantially equal to each other as shown in FIG. 2, and the both units 1 and 2 have the flanges 4 and 8 on the same surface. When the open surface sides are overlapped with each other, the semi-cylindrical portions 3 and 7 are cylindrical, and the internal threads 6 and 10 formed on the inner periphery thereof are continuous spirals.
[0017]
In the second fastener single body 2, the distal end outer shape of the extension portion 9 is a conical taper surface having a small distal end, and the surface of the first fastener single body 1 is overlapped with the surface of the extension portion 9 overlapping the first fastener single body 1. A sharp wedge body 17 for expanding the extension portion 5 is provided in a protruding shape.
[0018]
Further, the extension 9 of the second single fastener 2 is provided with small holes 18 into which the small protrusions 14 of the first single fastener 1 are fitted at both side positions of the tip portion.
[0019]
As shown in FIG. 1, the first fastener unit 1 and the second fastener unit 2 are overlapped so that the small holes 18 of the second fastener unit 2 fit into the small protrusions 14 of the first fastener unit 1. Accordingly, the semi-cylindrical portion 7 of the second fastener single body 2 protrudes from the collar portion 4 of the first single fastener 1 and the wedge body 17 is accommodated in the semi-cylindrical portion 3. In this state, both fasteners The single units 1 and 2 are set by a ring body 19 that is externally inserted over a position close to the flange 4 in the semi-cylindrical portion 3 of the first fastener unit 1 and the extension 9 of the second fastener unit 2. It is in a state.
[0020]
The fastener body A of the present invention is configured as described above. As shown in FIG. 5A, for example, the first fastener unit 1 is accommodated in the ALC (a) with a diameter corresponding to the outer diameter of the semi-cylindrical portions 3 and 7. A pilot hole b having a length is drilled, and the fastener body A set as shown in FIGS. 1 and 4A and 4B is inserted into the pilot hole b from the extension portion 5 of the first single fastener 1. By extending the flange 4 against the outer surface of the ALC (a), the extension 9 of the second single fastener 2 enters the pilot hole.
[0021]
In this state, when the second fastener unit 2 is driven into the pilot hole b by striking the collar part 8, the collar part 4 comes into contact with the outer surface of the ALC (a) and stops. The second fastener unit 2 breaks the small protrusion 14 and enters the pilot hole b.
[0022]
When the second fastener 2 enters the pilot hole, the wedge body 17 provided at the tip of the extension 9 advances toward the tip in the substantially semi-conical recess 11 of the first fastener 1 and slits. The extension part 5 divided into two by 12 is expanded on both sides.
[0023]
At the same time, since the extension portion 5 of the first fastener unit 1 is inclined toward the overlapping surface side of the second fastener unit 2, the extension of the second fastener unit 2 that is substantially straight with the semi-cylindrical unit 7. When the portion 9 enters, the extension portion 5 of the first fastener 1 is bent outward with the Nusumi portion 13 as a base point.
[0024]
Further, the extension portion 9 of the second fastener single body 2 is bent outwardly based on the Nusumi portion 16 by a reaction force when the extension portion 5 of the first fastener single body 1 is bent.
[0025]
As shown in FIGS. 4C and 4D, when the second fastener unit 2 is completely driven until the flange portion 8 comes into contact with the outer surface of the ALC (a) as shown in FIG. The extension portion 5 of the single fastener 1 1 performs both sides and outward expansion, and the extension 9 of the second fastener 2 is bent outward, thereby substantially extending the legs in three directions. Thus, by this opening leg, the pressure contact area with the ALC can be greatly expanded, and thereby the pull-out strength can be improved.
[0026]
Further, the semi-cylindrical portions 3 and 7 of both the fasteners 1 and 2 are formed in a coaxial cylindrical shape. As shown in FIG. 5C, if a bolt 21 is screwed to this, the outer surface of the ALC (a) is Thus, the object c to be fixed can be fixed.
[0027]
In addition, although the use of the fastener body A demonstrated the case of ALC, it can be similarly used for concrete, a block, etc.
[0028]
【The invention's effect】
As described above, according to the present invention, the extension part of the first fastener unit is divided into a plurality of slits and bent, and the extension part of the first fastener unit is expanded to the extension part of the second fastener unit. Since the wedge body is provided, the extension part of both fasteners can be opened in three directions during driving, thereby greatly increasing the contact area of the open leg part to the object to be driven, By improving the pull-out strength, the object to be attached can be firmly fixed.
[Brief description of the drawings]
1A is a front view showing a set state of a fastener body, FIG. 1B is a longitudinal front view of the same, and FIG. 2A is a bottom view of a second fastener alone, and FIG. FIG. 3A is an enlarged side view taken along arrow aa in FIG. 2A, FIG. 3B is an enlarged side view taken along arrow bb in FIG. Is a cross-sectional view taken along the arrow cc in FIG. 2, (D) is an enlarged side view taken along the arrow aa in FIG. 2 (B), (E) is an enlarged side view taken along the arrow bb in FIG. FIG. 4A is a plan view of the fastener body, FIG. 4B is a left side view of the same, and FIG. 4C is a view after completion of driving of the fastener body. FIG. 5D is a left side view of the same. FIG. 5A is a view showing the use state of the fastener body, FIG. 5A is a cross-sectional view inserted into a pilot hole, and FIG. , (C) Cross-sectional view of the object to be attached was bolted EXPLANATION OF REFERENCE NUMERALS
A Fastener body 1 First fastener single body 2 Second fastener single body 3, 7 Semi-cylindrical portion 4, 8 Gutter portion 5, 9 Extension portion 6, 10 Female screw 12 Slit 14 Small protrusion 15 Flange 17 Wedge body 18 Small hole

Claims (2)

A combination of a first fastener unit and a second fastener unit each provided with a flange part on the outer peripheral surface on one end side of the semi-cylindrical part and an extension part on the other end side and formed with a male screw threaded part on the inner peripheral surface of the semi-cylindrical part. And a substantially semi-conical concave portion provided on the extension portion of the first fastener unit on the surface facing the open surface of the semi-cylindrical portion and narrowing toward the distal end side, and a length for dividing the extension portion into a plurality of portions. The first fastener is provided by providing a slit in the direction and being accommodated in the substantially semi-conical recess provided in the first fastener unit in the extension portion of the second fastener unit, and proceeding to the front end side in the recess. A wedge body is provided for expanding the extension portion divided by the single slit in the opening direction of the slit , and the first fastener single body and the second fastener single body are connected to each other so that the open surface sides of the respective semicylindrical portions are mutually overlapping manner facing the first fastener single Fastener body from one end side focused in a state where one end side of the second fastener alone is projecting a. In the first fastener alone, the length direction of the extension portion is inclined toward the open surface side of the semi-cylindrical portion with respect to the semi-cylindrical portion, and the extension portion is divided into two by a slit provided over the entire length in the length direction. A substantially semi-conical concave portion that is continuous with the inside of the semi-cylindrical portion and narrows toward the tip side is provided on the surface facing the open surface of the cylindrical portion, and the extension portion of the second fastener unit is connected substantially linearly to the semi-cylindrical portion. In this state, a wedge body is provided on the surface overlapping the first fastener alone at the tip of the extension, and the wedge body fits into the semiconical recess from the half cylinder portion of the first fastener alone. The fastener body according to claim 1, wherein the fasteners are bundled with an annular object.

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