JP2869052B2 - Drill screws for steel frame assembly - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a housing by a steel frame construction method (ResidentialSteel Framing) using a relatively thin galvanized steel sheet having a thickness of about 1 mm as a frame material of a house by a two-by-four construction method (2 × 4 construction method). It relates to the so-called steel house framework, i.e. the drill screws used to assemble the steel frame.

[0002]

2. Description of the Related Art As shown in FIG. 11, for example, a steel frame as described above is formed by using a steel
The gypsum board 3 is attached and fixed as an interior material to the steel frame 1, and the surface thereof is finished with a decorative material such as wallpaper or cloth or painted. In order to attach the gypsum board 3 to the steel frame 1, usually, a drill screw 4 having a trumpet-shaped head is used.
In order to finish the surface of the gypsum board 3, the trumpet-shaped head 4 a is screwed so as to be buried to a position flush with or slightly submerged with the surface of the gypsum board 3. Such a gypsum board mounting drill screw is a standard product specified by JIS B1125.

[0003]

The steel frame 1 assembled using the drill screws 2 as described above.
When the gypsum board 3 is mounted on the gypsum board 3, as shown in FIG. 11A, the gypsum board 3 is lifted up at a position where the gypsum board 3 comes into contact with the head 2a of the drill screw 2 used for assembling the steel frame 1. There was a problem that unevenness was generated on the surface of No. 3 and the finished surface was damaged. As a countermeasure, the thickness of the head 2a of the drill screw 2 used for assembling the steel frame 1 is made as thin as possible as shown in FIG. Was unavoidable and had a bad effect on the finished surface. In addition, since the thickness of the head portion 2a is reduced, the engagement hole of the rotating tool (driver bit) provided in the head portion 2a becomes shallow, causing breakage and early wear of the bit, which significantly impairs workability. There was a problem. Also,
In order to fundamentally solve the unevenness generated on the surface of the gypsum board 3 as described above, as shown in FIG. 11C, a wooden base material 5 is attached to the surface of the steel frame 1 on which the gypsum board 3 is attached. In some cases, the gypsum board 3 is attached and fixed to the base material 5, but this construction method requires a lot of trouble and has a problem that the cost is high.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. By specifying the shape of the head of a drill screw for assembling a steel frame, the horn shape of the gypsum board mounting drill screw is specified. With the fastening axial force required to bury the head in the gypsum board, the head of the steel frame assembling drill screw is configured to bite into the back of the gypsum board and be buried, and the surface of the gypsum board has irregularities. The present invention provides a drill screw for assembling a steel frame capable of effectively preventing occurrence of cracks.

[0005]

In order to achieve the above object, the present invention provides a drill screw having a flanged head and used for assembling a steel frame, comprising a trumpet-shaped head, For the gypsum board mounting drill screw used to mount the interior gypsum board to the steel frame, the flange of the flanged head is formed to be thin so as not to cause irregularities that hinder the gypsum board. The volume of the main head projecting above the flange portion and providing the engaging portion of the rotating tool is configured to be about 50% or less of the volume buried in the gypsum board of the trumpet-shaped head. When the gypsum board is mounted and fixed to the steel frame using the gypsum board mounting drill screw, at least the main head of the flanged head is buried in the gypsum board by its screwing axial force. Tsu, characterized in that is.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 show a drill screw 10 for assembling a steel frame according to the present invention. The drill screw 10 has a drill portion 12 at one end of a screw shaft portion 11 and a flange at the other end. It has a head 13. The flanged head 13 is
It has a shape in which a flat truncated cone-shaped main head 15 is protruded from the flange 14, and an engaging hole 16 for a rotating tool is provided from the upper end surface of the main head 15 to the flange 14. And the main head 15
, But sufficient torque transmission is possible. Then, the gypsum board 3 is provided on the upper end surface of the main head 15.
A thin annular press-fitting blade 17 is formed to facilitate the burial of the blade.

The flange portion 14 has a sufficient seating area required for assembling the steel frame 1 and is formed so as to be thin so as not to cause irregularities which hinder the gypsum board 3.
Specifically, for the screw shaft 11 having a nominal diameter (d) of 4.8φ, the flange 14 has a diameter (A) of 8.0φ to 10.0φ,
The thickness (C) is 1.2 mm. The main head 15 is designed so that the diameter (B) of the base end is 5.0φ and the height (h) is 1.3 mm. And, as described later, the gypsum board 3
The volume V of the main head 15 which is buried in a circle is an annular body in an area indicated by cross hatching in FIG.

FIG. 4 and FIG. 5 show a main part of a gypsum board mounting drill screw 20.
It has a trumpet-shaped head 21 in which a cross hole 22 is provided. Since the drill screw 20 is a standard product defined by the JIS standard as described above,
Although a detailed description is omitted, in the case of the drill screw 20 corresponding to the steel frame assembling drill screw 10 having the above-described dimensions, the nominal diameter of the screw shaft portion 23 is 3.9φ.
The diameter (E) of the trumpet-shaped head 21 is 9.0φ.
As described above, the volume (W) of the trumpet-shaped head 21 buried in the gypsum board 3 is the buried volume (V) of the main head 15 of the drill screw 10 described above in an area indicated by cross hatching in FIG. ) Is twice or more.

FIG. 6 shows a drill screw 10 having the above configuration.
2 shows a main part in a state where a gypsum board 3 is attached to and fixed to a steel frame 1 using a gypsum board attachment drill screw 20 on a steel frame 1 assembled using the method. The gypsum board 3 is drilled with the drill portion 24 of the drill screw 20 to penetrate the gypsum board 3. After the steel frame 1 is drilled, the screw shaft 23 is screwed in to fix the gypsum boat 3 to the steel frame 1. In order to finish the surface of the gypsum board 3 with a decorative material such as wallpaper or cloth, the trumpet-shaped head 21 is screwed until it is buried at a position flush with the surface of the gypsum boat 3 or at a position slightly submerged. In order to bury the trumpet-shaped head 21, an axial force (F) required to push and expand the prepared hole by the volume (W) shown by hatching in FIG. 5 is applied to the drill screw 20. This axial force (F) also acts on the drill screw 10 for assembling the steel frame via the gypsum board 3, but the main head 15 of the drill screw 10 has a flat truncated cone shape, and an annular press-fitting blade is provided on the upper end surface. 17 and
Since the volume V to be buried is less than half of the volume W to be buried of the drill screw 20, the main head 15 is easily pressed into the gypsum board 3 and buried. Further, the flange 14 is also partially buried. Therefore, the flanged head 13 of the drill screw 10
The gypsum board 3 does not float up at (14, 15), and no irregularities occur on the surface.

FIGS. 7 and 8 show another embodiment of the drill screw 10 for assembling a steel frame according to the present invention, in which the main head 15 of the flanged head 13 has a short hexagonal cylindrical shape. A hexagonal portion on the outer periphery is formed as an engaging portion 16 'of the rotating tool, and the tapered concave portion 1 which is upwardly expanded inward is formed on the body.
8, a thin annular press-fitting blade 17 is formed on the upper end surface.

FIGS. 9 and 10 show still another embodiment of the drill screw 10 according to the present invention. In this embodiment, the main head 15 of the flanged head 13 is formed as a pointed cross-shaped projection which is easily pressed into the gypsum board 3, and its outer peripheral portion is provided with an engaging portion 16 'of a rotary tool. Is provided.

[0013]

As described above, according to the present invention,
The head of the drill screw assembled with the steel frame is pressed into the back of the gypsum board to be fixed to the steel frame and buried, so that the surface of the gypsum board does not have irregularities and a beautiful finished surface is obtained. Can be Therefore, there is no need to construct a wooden substrate as in the prior art. Further, unlike a conventional drill screw having a thin head, a rotary tool, that is, a driver bit is not damaged or prematurely worn.

[Brief description of the drawings]

FIG. 1 is a front view of a drill screw for assembling a steel frame according to the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a cross-sectional view of a main part along line 3-3 in FIG. 2;

FIG. 4 is a front view of a gypsum board mounting drill screw.

FIG. 5 is a plan view of the same.

FIG. 6 is a cross-sectional view illustrating a main part of a gypsum board mounted and fixed to a steel frame.

FIG. 7 is a plan view showing another embodiment of a drill screw for assembling a steel frame according to the present invention.

FIG. 8 is a sectional view taken along line 8-8 in FIG. 7;

FIG. 9 is a plan view showing still another embodiment of a drill screw for assembling a steel frame according to the present invention.

FIG. 10 is a front view of the main part.

FIG. 11 is an explanatory view of a conventional example showing a state in which a gypsum board is attached and fixed to a steel frame.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steel frame 3 Gypsum board 10 Drill screw for steel frame assembly 11 Screw shaft part 12 Drill part 13 Head with flange 14 Flange part 15 Main head 16 Engagement hole 16 'Engagement part 17 Annular press-fitting blade 18 Tapered recess 20 Gypsum board mounting drill screw 21 Trump head 22 Cross hole 23 Screw shaft part 24 Drill part V Volume to be embedded in gypsum board 3 of drill screw 10 W Volume to be embedded in gypsum board 3 of drill screw 20

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) F16B 25/10 F16B 25/00

Claims (4)

(57) [Claims] 1. A drill screw having a flanged head and used for assembling a steel frame, having a trumpet-shaped head, and used for mounting an interior gypsum board to the steel frame. For the drill screw, the flange of the flanged head is formed to be thin so as not to cause irregularities that hinder the gypsum board. The volume of the main head providing the joint is configured to be about 50% or less of the volume of the trumpet-shaped head buried in the gypsum board, and the gypsum board is attached to the gypsum board using the gypsum board mounting drill screw. A steel frame assembly door wherein at least the main head of the flanged head is buried in the gypsum board by the screwing axial force when the steel frame is fixed to the steel frame. Lil screw. 2. The main body of the flanged head has a flat, truncated conical shape, an engagement hole for a rotating tool is provided from an upper end surface to the flange portion, and a thin annular ring is formed on the upper end surface. The drill screw for assembling a steel frame according to claim 1, wherein a press-fitting blade is formed. 3. The upper end face of the flanged head, wherein the main head is a short rectangular tubular body, an engaging portion of a rotating tool is formed on an outer peripheral portion, and a tapered concave portion that expands upward is provided inside. 2. A drill screw for assembling a steel frame according to claim 1, wherein a thin annular press-fitting blade is formed on the steel frame. 4. The steel frame assembly according to claim 1, wherein the main head of the flanged head is formed as a pointed cross-shaped projection, and an engaging portion of a rotating tool is provided on an outer peripheral portion. For drill screw.