Fixing method and structure for fixing wood material to lightweight steel beams, and metal anchor bushings used therein

Abstract

To reduce trouble when fixing a wooden material such as a wooden floor plate, beam and the like to a light weight shape steel for constituting a skeleton of a light weight steel construction, and to improve workability.SOLUTION: A metal anchor bush 3 is driven into a locking hole 2 formed in a light weight shape steel 1, a wooden material where a shaft hole 4 is formed at the same position as the locking hole 2 is installed, and a nail 6 is driven into the metal anchor bush 3 via the shaft hole 4. The metal anchor bush 3 has a slip-off prevention swelling part 3e, and by the nail 6 being driven, it comes into a pressure fitted state, and fixes the light weight shape steel 1 and a wooden material 5.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a fixing method and structure for fixing wooden materials, such as base materials such as joists and plywood floor panels, to lightweight structural steel used in the framework of lightweight steel-framed construction, and to a metal anchor bushing for use therein. [Background technology]

[0002] Conventionally, in general buildings constructed with lightweight steel frames, when fixing floor panels, joists, etc. to lightweight steel such as H-shaped steel used in the framework, bolt holes are drilled in the flange 1a of the lightweight steel 1 and in the wooden floor material 10 placed on the flange 1a, as shown in Figure 19, and the floor material 10 is fixed to the lightweight steel 1 by threading a nut N onto a bolt B passed through the bolt hole (Patent Document 1, etc.). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-20967 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the conventional fixing method described above requires time and effort to tighten the bolts and nuts, resulting in poor workability.

[0005] Therefore, the main object of the present invention is to provide a fixing method and structure that can reduce the effort and improve workability when fixing wooden materials such as wooden floorboards and joists to the lightweight steel that makes up the framework of a lightweight steel-framed structure, as well as a metal anchor bushing for use therewith. [Means for solving the problem]

[0006] In order to achieve the above object, a method for fixing wooden material to lightweight structural steel according to one embodiment of the present invention includes the steps of drilling a locking hole of a predetermined diameter at a predetermined position in the lightweight structural steel, driving a metal anchor bush into the locking hole and locking it to the lightweight structural steel, arranging a wooden material having an axial hole formed at a predetermined position for passing a shaft of a nail or headed pin along the lightweight structural steel so that the positions of the axial hole and the locking hole match, and driving a nail or headed pin of a predetermined length into the metal anchor bush through the axial hole of the wooden material to fix the wooden material to the lightweight structural steel, wherein the metal anchor bush has an annular flange and a metal anchor bush having a central hole around the flange. and a plurality of snap-fit ​​pieces extending from one side of the flange portion, the snap-fit ​​pieces being formed by dividing a cylinder communicating with the central hole by a split groove extending in the axial direction, and having a tapered bulging portion that bulges outward in the radial direction, the bulging portion forming a stopper that penetrates the locking hole and locks onto the lightweight structural steel when the metal anchor bushing is driven into the locking hole of the lightweight structural steel, and the snap-fit ​​pieces are configured to be pressed against each other between the locking hole and the nail or headed pin when the nail or headed pin is driven into the locking hole, and the metal anchor bushing and the nail or headed pin are fastened to the locking hole.

[0007] It is preferable that the wooden material has a counterbore formed at the end of the shaft hole, into which the flange fits and which serves to position the wooden material relative to the lightweight structural steel.

[0008] The inner diameter of the locking hole is preferably the same as the outer diameter of the cylindrical body or is smaller than the outer diameter of the cylindrical body by a maximum of 1 mm.

[0009] It is preferable that the bulge portion is provided in the middle of the snap-fit ​​piece, and that the metal anchor bush is configured to be able to stand on the lightweight steel by inserting the tip portion of the snap-fit ​​piece from the bulge portion into the locking hole.

[0010] A vibration-damping material may be interposed between the light-gauge steel and the wood material, and the vibration-damping material may have an opening formed therein to accommodate the flange portion.

[0011] The vibration-damping material may be fixed to the wooden material in advance, and the wooden material may be configured to be positioned relative to the light-gauge steel by accommodating the flange portion in the opening.

[0012] According to one embodiment of the present invention, a fixing structure for fixing wood material to lightweight structural steel includes a lightweight structural steel having a locking hole of a predetermined diameter formed therein, a metal anchor bushing driven into the locking hole, and a wooden material fixed to the lightweight structural steel by a nail or headed pin driven into the metal anchor bushing. The metal anchor bushing has an annular flange and a plurality of snap-fit ​​pieces extending from one side of the flange around a central hole in the flange. The snap-fit ​​pieces are formed by dividing a cylinder communicating with the central hole by a split groove extending in the axial direction, and have tapered bulges that bulge radially outward. The bulges pass through the locking hole in the lightweight structural steel to form a stopper that locks the lightweight structural steel to the light-weight structural steel. The snap-fit ​​pieces are pressed against each other between the locking hole and the axis of the nail or headed pin, and are configured so that the metal anchor bushing and the nail or headed pin are fastened to the locking hole.

[0013] In the fixing structure for fixing wooden material to lightweight structural steel according to the present invention, it is preferable that the wooden material has a countersunk portion formed at the end of the axial hole into which the flange portion fits and which positions the wooden material relative to the lightweight structural steel.

[0014] In the fixing structure for fixing wooden material to lightweight structural steel according to the present invention, a vibration-damping material is interposed between the lightweight structural steel and the wooden material, and the vibration-damping material may have an opening formed therein in which the flange portion is accommodated.

[0015] In the fixing structure for fixing wooden material to lightweight structural steel according to the present invention, the vibration-damping material can be fixed to the wooden material in advance, and the wooden material can be positioned relative to the lightweight structural steel by accommodating the flange portion in the opening.

[0016] According to another aspect of the present invention, there is provided a metal anchor bushing including an annular flange and a plurality of snap-fit ​​pieces extending from one side of the flange around a central hole of the flange, the snap-fit ​​pieces being formed by dividing a cylindrical body communicating with the central hole by a split groove extending in the axial direction, and each snap-fit ​​piece having a tapered bulge that bulges outward in the radial direction. The bulge may be provided at a tip or a middle portion of the snap-fit ​​piece. [Effects of the Invention]

[0017] According to the present invention, a metal anchor bush is driven into a lightweight structural steel, and then a nail or headed pin can be driven into the metal anchor bush through the axial hole of the wooden material, thereby enabling the wooden material to be fixed to the lightweight structural steel, thereby improving workability. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a perspective view showing a first embodiment of a method for fixing wood material to lightweight structural steel according to the present invention. [Figure 2] FIG. 2 is a perspective view showing a modification of the embodiment of FIG. [Figure 3] FIG. 2 is an enlarged perspective view of a metal anchor bushing, which is a component of the present invention. [Figure 4] 4 is a perspective view of the metal anchor bushing of FIG. 3 as viewed from the opposite direction (below). FIG. [Figure 5] 4A to 4E are views showing the metal anchor bushing of FIG. 3, in which (a) is a front view, (b) is a right side view, (c) is a bottom view, (d) is a plan view, and (e) is an AA cross-sectional view. [Figure 6] 2 is a cross-sectional view showing each component of the present invention shown in FIG. 1. [Figure 7] 7 is a cross-sectional view showing a step subsequent to the cross-sectional view of FIG. 6. [Figure 8] 8 is a cross-sectional view showing a step subsequent to the cross-sectional view of FIG. 7. [Figure 9] 9 is a cross-sectional view showing a step subsequent to the cross-sectional view of FIG. 8. [Figure 10] 10 is a cross-sectional view showing a step subsequent to the cross-sectional view of FIG. 9. [Figure 11] 11 is a cross-sectional view showing a step subsequent to the cross-sectional view of FIG. [Figure 12] FIG. 4 is a cross-sectional view showing a second embodiment of the metal anchor bushing according to the present invention. [Figure 13] FIG. 13 is a cross-sectional view showing the metal anchor bushing of FIG. 12 in use. [Figure 14] FIG. 13 is a cross-sectional view showing the metal anchor bushing of FIG. 12 in use. [Figure 15] FIG. 13 is a cross-sectional view showing the metal anchor bushing of FIG. 12 in use. [Figure 16] 13 is a cross-sectional view showing a fixing structure for fixing a wooden material to a lightweight structural steel using the metal anchor bush of FIG. 12. FIG. [Figure 17] FIG. 17 is a cross-sectional view showing a modified embodiment of the process structure shown in FIG. [Figure 18] FIG. 10 is a cross-sectional view showing another embodiment of the metal anchor bushing according to the present invention. [Figure 19] FIG. 1 is a cross-sectional view showing a conventional method for fixing wood material to lightweight structural steel. DETAILED DESCRIPTION OF THE INVENTION

[0019] An embodiment of a method for fixing wood material to lightweight structural steel according to the present invention will be described below with reference to Figures 1 to 18. Note that the same or similar components are designated by the same reference numerals throughout all the figures and all the embodiments.

[0020] First, a first embodiment of a method for fixing wood material to lightweight structural steel according to the present invention will be described in order of steps with reference to Figs. 1 to 11. With reference to Figs. 1 and 2, a plurality of locking holes 2 of a predetermined diameter are drilled at predetermined positions in lightweight structural steel 1. The locking holes 2 can be drilled at a predetermined pitch. In the illustrated example, lightweight structural steel 1 is an H-beam, but it may also be other lightweight structural steel such as a C-beam or an I-beam. In the illustrated example, the locking holes 2 are formed in the flange portion of the lightweight H-beam. The thickness of the flange portion of lightweight H-beam steel used in lightweight steel frame construction is, for example, 3 to 6 mm.

[0021] The metal anchor bushing 3 is driven into the locking hole 2 and locked to the lightweight structural steel 1. As shown in FIGS. 3 to 5, the metal anchor bushing 3 has an annular flange 3a and a plurality of snap-fit ​​pieces 3c extending from one side of the flange 3a around a central hole 3b in the flange 3a. The snap-fit ​​pieces 3c are formed by dividing a cylindrical body communicating with the central hole 3b by a split groove 3d extending in the axial direction. The snap-fit ​​pieces 3c have a tapered bulge 3e at their tip that bulges outward in the radial direction and tapers toward the tip.

[0022] As shown in Figure 7, the metal anchor bushing 3 can be driven into the locking hole 2 by inserting the tapered portion of the bulge 3e into the locking hole 2, leaving the metal anchor bushing 3 freestanding on the lightweight structural steel 1, and then hitting it from above with a hammer or the like. The inner diameter D1 (Figure 6) of the locking hole 2 is the same as the outer diameter D2 of the cylindrical body (the outer diameter of the body 3f between the flange 3a and the bulge 3e), or is set to be up to 1 mm smaller than the outer diameter D2 of the cylindrical body (D2 - 1 mm ≤ D1 ≤ D2). When the metal anchor bushing 3 is driven into the locking hole 2 of the lightweight structural steel 1, the snap-fit ​​piece 3c deforms inward, causing the bulge 3e to pass through the locking hole 2, as shown in Figure 8, and then the bulge 3e penetrates the locking hole 2, as shown in Figure 9. Immediately after the bulging portion 3e of the snap-fit ​​piece 3c passes through the locking hole 2, as shown in Figure 9, the snap-fit ​​piece 3c undergoes slight plastic deformation inward, but the elastic restoring force of the snap-fit ​​piece 3c causes the bulging portion 3e to return to an outward position to some extent, and the bulging portion 3e that has passed through the locking hole 2 locks onto the lightweight structural steel 1, forming a retaining mechanism.

[0023] The light-gauge steel 1 can be transported to the construction site with the locking holes 2 drilled in advance in the factory and the metal anchor bushings 3 driven into the locking holes 2. The metal anchor bushings 3 are prevented from falling out of the locking holes 2 of the light-gauge steel 1 during transportation because they are retained by the bulging portions 3e.

[0024] A wooden piece 5 having a plurality of axial holes 4 formed in the same positions as the locking holes 2 is placed along the light-gauge steel 1 so that the axial holes 4 and the locking holes 2 are aligned, and nails 6 of a predetermined length are driven into the metal anchor bushings 3 through the axial holes 4 of the wooden piece 5 to fix the wooden piece 5 to the light-gauge steel 1 (Figs. 10 and 11). Headed pins (not shown) can also be used instead of the nails 6. The wooden piece 5 fixed to the light-gauge steel 1 can be, for example, a base material such as a joist board, or a floor panel, wall panel, etc. The wooden piece 5 can have the axial holes 4 formed in advance in a factory and then be transported to the construction site.

[0025] The wooden materials 5 illustrated in FIG. 1 are all base materials made of rod-shaped (square) wooden members such as joists. For example, the wooden material 5 serving as a base material fixed to the upper surface of the light-gauge steel 1 has its upper surface 5a as a nailing surface, and a floor panel P is placed on the upper surface 5a of the wooden material 5 constituting the base material and nailed to be fixed. The wooden material 5 serving as a base material fixed to the lower surface of the light-gauge steel 1 has its side surface 5b as a nailing surface, and a wall panel W is nailed to the side surface 5b of the wooden material 5 constituting the base material. When fixing a floor panel to the light-gauge steel 1, as shown in FIG. 2, it is also possible to fix a plank-shaped wooden material 5 such as structural plywood, particle board, OSB (oriented strand board), or MDF (medium density fiberboard) that constitutes a floor panel directly to the light-gauge steel 1 without using a base material.

[0026] It is preferable that the wooden piece 5 has a counterbore 8 (see FIG. 6, etc.) formed at the end of the shaft hole 4, into which the flange 3a fits and which positions the wooden piece 5 relative to the light-gauge steel 1. By providing the counterbore 8, when installing the wooden piece 5 on the light-gauge steel 1, the counterbore 8 is guided by the flange 3a of the metal anchor bush 3, making it easy to position (see FIG. 10).

[0027] As shown in Figure 10, once the wooden piece 5 is positioned on the lightweight structural steel 1, a nail 6 is inserted into the axial hole 4 of the wooden piece 5. The nail 6 used has the same dimensions as the inner diameter of the central hole 3b of the metal anchor bushing 3. The inner diameter D4 (Figure 6) of the axial hole 4 is also set to the same dimension as the inner diameter of the central hole 3b. When the nail 6 is inserted into the axial hole 4, the snap-fit ​​piece 3c is plastically deformed slightly inward as described above, so that the head of the nail 6 protrudes from the wooden piece 5 as shown in Figure 10. When the head of the nail 6 is struck with a hammer or the like, the nail 6 is driven into the metal anchor bushing 3, and the head of the nail 6 is embedded in the surface of the wooden piece 5 as shown in Figure 11.

[0028] When the nail 6 is driven into the metal anchor bush 3, the snap-fit ​​piece 3c is pressed between the locking hole 2 and the nail 6, and the metal anchor bush 3 and the shaft 6a of the nail 6 are fastened to the locking hole 2 in a pressure-fit state, thereby fixing the wood material 5 to the lightweight structural steel 1.

[0029] If the metal anchor bushing 3 is attached to the lightweight steel 1 and the axial hole 4 is formed in the wood material 5 in advance at the factory, then at the construction site, all that is required is to insert and hammer the nail 6 into the axial hole 4, improving workability. In addition, since the nail or headed pin is hammered in to secure the structure, construction can be carried out without the use of power tools.

[0030] 12 to 17 show a metal anchor bushing according to the second embodiment. In the metal anchor bushing 3A of the second embodiment, the bulging portion 3e is provided in an intermediate portion away from the tip of the snap-fit ​​piece 3c. As shown in FIG. 13, a portion 3g of the snap-fit ​​piece 3c on the tip side from the bulging portion 3e constitutes a self-supporting guide portion that allows the metal anchor bushing 3A to stand on the light-gauge steel 1 by being inserted into the locking hole 2, making it easier to nail the metal anchor bushing 3A into the locking hole 2 of the light-gauge steel 1. The tip side portion 3g has the same outer diameter as the body portion 3f of the snap-fit ​​piece 3c (the portion between the bulging portion 3e and the flange portion 3a). The snap-fit ​​piece 3c of the metal anchor bushing 3A has a tapered tip. The other configuration of the metal anchor bushing 3A of the second embodiment is the same as that of the metal anchor bushing 3 described above. When the metal anchor bushing 3A is driven into the locking hole 2 with a hammer or the like from the state shown in Figure 13, the snap-fit ​​piece 3c deforms inward while entering the locking hole 2, as shown in Figure 14, and as shown in Figure 15, the snap-fit ​​piece 3c undergoes slight plastic deformation inward but elastically returns to the outside, and the bulge 3e that passes through the locking hole 2 locks into the light-weight structural steel 1 to form a retainer. After the metal anchor bushing 3A has been driven into the locking hole 2 of the light-weight structural steel 1, the wooden piece 5 is positioned on the light-weight structural steel 1 so that the counterbore portion 8 fits into the flange portion 3a, as shown in Figure 16, and a nail 6 is driven into the metal anchor bushing 3A through the axial hole 4 of the wooden piece 5, and the nail 6 and the snap-fit ​​piece 3c are press-fit into the locking hole 2, fixing the wooden piece 5 to the light-weight structural steel 1.

[0031] FIG. 17 illustrates another embodiment of the present invention. In the example shown in FIG. 17 , a damping material 7 is interposed between a lightweight structural steel 1 and a wooden material 5. The damping material 7 has an opening 7a formed therein to accommodate the flange 3a. To accommodate the flange 3a in the opening 7a, the thickness of the damping material 7 is such that the flange 3a is embedded therein. The thickness may be substantially equal to or slightly greater than the flange 3a. The diameter of the opening 7a may be substantially equal to or slightly smaller than the diameter of the flange 3a. The shaft hole 4 of the wooden material 5 communicates with the center of the opening 7a. By providing such an opening 7a in the damping material 7, it is not necessary to provide a counterbore in the wooden material 5. Furthermore, by previously fixing the damping material 7 to the wooden material 5 with adhesive, nailing, or the like, the opening 7a can serve to position the wooden material 5 relative to the lightweight structural steel 1. The vibration-damping material 7 can be provided, for example, only in the area where the lightweight structural steel 1 and the wooden material 5 overlap.

[0032] The damping material 7 can be made of a known material. The damping material is attached to a sound source or the like to attenuate the vibration of the object through which the vibration caused by the sound propagates, thereby suppressing the vibration itself and reducing so-called solid-borne sound. Known damping materials in the construction field include, for example, rubber-based damping materials, resin-based damping materials, asphalt-based damping materials, and gypsum board. Known materials for rubber-based or resin-based damping materials include, for example, butyl rubber, hard polyurethane foam, and vinyl acetate. As an asphalt-based damping material, for example, a strip-shaped asphalt sheet mixed with an inorganic material such as metal, which has high density and viscoelasticity, can be used. The damping material 7 can be, for example, 3 to 10 mm thick.

[0033] The present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit of the present invention. For example, although the above-described embodiment uses two snap-fit ​​pieces, three or four snap-fit ​​pieces may be provided. Furthermore, as shown in FIG. 18, the shape of the bulging portion 3e may be tapered over its entire length. Furthermore, for example, another plate material, such as an ALC plate, may be interposed between the lightweight steel and the wood material. [Explanation of symbols]

[0034] 1 Light-gauge steel 2 Locking hole 3 Metal anchor bushings 3a Tsuba 3b central hole 3c Snap-fit ​​piece 3d split groove 3e bulge 4 shaft holes 5 Wood material 6 nails 7 Damping material

Claims

1. A step of drilling a locking hole of a predetermined diameter at a predetermined position in a lightweight structural steel; a step of driving a metal anchor bush into the locking hole and locking it to the light-gauge steel; A step of placing a wooden piece having a shaft hole formed at a predetermined position for passing a shaft of a nail or a headed pin on the light-gauge steel so that the positions of the shaft hole and the locking hole match; a step of driving a nail or headed pin of a predetermined length into the metal anchor bush through the axial hole of the wooden material to fix the wooden material to the light-gauge steel; Including, The metal anchor bushing includes an annular flange and a plurality of snap-fit ​​pieces extending from one side surface of the flange around a central hole of the flange, the snap-fit ​​piece is formed by dividing a cylindrical body communicating with the central hole by a split groove extending in the axial direction, and has a tapered bulging portion that bulges outward in the radial direction, The bulging portion constitutes a retainer that penetrates the locking hole and locks onto the light-weight steel by driving the metal anchor bush into the locking hole of the light-weight steel, The snap-fit ​​piece is configured to be pressed between the locking hole and the nail or the headed pin when the nail or the headed pin is driven into the locking hole, and the metal anchor bush and the nail or the headed pin are fastened to the locking hole. A method for fastening wood materials to lightweight steel beams.

2. The method according to claim 1, wherein the wooden piece has a counterbore formed at an end of the shaft hole, into which the flange fits and which positions the wooden piece relative to the light-gauge steel.

3. The method according to claim 1 , wherein the inner diameter of the locking hole is the same as the outer diameter of the cylindrical body or is at most 1 mm smaller than the outer diameter of the cylindrical body.

4. The bulge is provided in a middle portion of the snap-fit ​​piece, The method according to claim 1, wherein the tip portion of the snap-fit ​​piece from the bulge portion is configured to be inserted into the locking hole so that the metal anchor bush can stand on the lightweight steel.

5. A vibration-damping material is interposed between the light-gauge steel and the wood material, The vibration-damping material has an opening formed therein in which the flange portion is accommodated. The method of claim 1.

6. The vibration-damping material is fixed to the wood material in advance, The method according to claim 5 , wherein the wood material is configured to be positioned relative to the light-gauge steel by receiving the flange portion in the opening.

7. A lightweight steel member having a locking hole of a predetermined diameter formed therein; a metal anchor bushing driven into the locking hole; a wooden piece having a shaft hole for passing a shaft of a nail or a headed pin formed in advance at a predetermined position that matches the locking hole, and the wooden piece being fixed to the light-gauge steel by a nail or a headed pin that is driven into the metal anchor bush through the shaft hole; The metal anchor bushing includes an annular flange and a plurality of snap-fit ​​pieces extending from one side surface of the flange around a central hole of the flange, the snap-fit ​​piece is formed by dividing a cylindrical body communicating with the central hole by a split groove extending in the axial direction, and has a tapered bulging portion that bulges outward in the radial direction, The bulging portion penetrates the locking hole of the light-weight steel to form a retainer that locks onto the light-weight steel, The snap-fit ​​piece is configured to be pressed between the locking hole and the shaft of the nail or the headed pin, and the metal anchor bush and the nail or the headed pin are fastened to the locking hole. A fixed structure that secures wood materials to lightweight steel.

8. 8. The fixing structure according to claim 7, wherein the wooden material has a counterbore formed at an end of the shaft hole, into which the flange fits and which serves to position the wooden material relative to the lightweight structural steel.

9. The fixing structure according to claim 7 , wherein the bulge is provided at a middle portion of the snap-fit ​​piece.

10. A vibration-damping material is interposed between the light-gauge steel and the wood material, The vibration-damping material has an opening formed therein in which the flange portion is accommodated. The fixing structure according to claim 7.

11. The vibration-damping material is fixed to the wood material in advance, The fixing structure according to claim 10, wherein the wooden material is positioned relative to the light-gauge steel by receiving the flange in the opening.

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