JPH09217453A - Floor structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the warpage and distortion of floor joists in the longitudinal direction by the use of floor joists formed of a rectangular steel pipe in a floor structure. SOLUTION: An exterior frame is formed by welding four large floor beams 51 comprising channel steel to a joining piece 4. A plurality of rectangular steel pipe floor small beams 52 are crossed over in parallel between the opposite large floor beams 51, 51 and secured onto the large floor beams 51 in use of joining pieces fastened at both end parts. In addition, a plurality of floor joists 54 on the small floor beans 52 juxtapositionally in the direction normal to the small floor beams 52. The floor joists 54a are formed of a rectangular steel pipe and then secured to the upper surface part of the small floor beams 52a by means of a longer vis than the floor joists. Besides, a recess 541 for receiving the head of the vis 6 is made on the upper surface part of the floor joists 54a for precluding the head of the vis 6 from projecting over the upper surface part of the floor joists 54a. The recess 541 is made on each part where the floor joists 54a intersects with the small floor beams 52a, and a prepared hole for the vis 6 is made on the center of each recess 541.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a floor structure suitable for constituting a building unit.

[0002]

2. Description of the Related Art Conventionally, as a floor structure constituting a building unit, a structure as described in Japanese Patent Laid-Open No. 4-198538 is known. In this floor structure, an outer frame is formed by floor girders, and a plurality of floor girders are bridged in parallel between facing floor girders, and a plurality of wooden floor joists are placed on the floor girders. And are installed side by side in a direction orthogonal to.

[0003]

However, in this conventional floor structure, since the wooden floor joists are used, the wooden floor joists may warp or be twisted in the longitudinal direction, There is a problem that it is difficult to request high accuracy. Further, in recent years, from the viewpoint of environmental problems such as forest protection, it has become very difficult to obtain long timber, and the wooden floor joists themselves have become expensive. Then, an object of the present invention is to provide a floor structure in which attention is paid to the above problems and high accuracy can be required, and material cost can be reduced.

[0004]

In order to achieve the above object, in a floor structure according to claim 1 of the present invention, an outer frame is formed by floor girders, and a plurality of floor girders are parallel to each other between facing floor girders. In the floor structure in which a plurality of floor joists are laid side by side in a direction orthogonal to the floor beam on the floor beam,
The floor joist according to claim 2, wherein the floor joist and the floor beam are crossed with each other by fastening and fixing the fastening material so as not to project on the upper surface of the floor joist, and the floor joist is formed of a square steel pipe. In the structure, an outer frame is formed by the floor girders, and a plurality of floor girders are bridged in parallel between the floor girders facing each other.On the floor girders, a plurality of floor joists are orthogonal to the floor girders. In the floor structure arranged side by side, the floor joists, the upper surface portion,
The floor structure according to claim 3 of the present invention is configured such that the right side surface portion and the left side surface portion are formed of a hat-shaped shaped steel composed of a flange portion that extends outward from the lower end portions of the both side surface portions. The floor joists are configured to be attached to the upper surface of the floor joist through mounting rails having locking portions on both sides of which the brim portions of both sides of the floor joists can be inserted, and the present invention is defined in claim 4. In the floor structure, the portion of the brim portion of the floor joist that intersects with the floor beam is fastened and fixed to the upper surface of the floor beam by a cut-and-raised piece provided on the upper surface of the floor beam. It has a structure. The shaped steel used for the floor joists of the floor structure of the present invention is formed by processing a thin steel plate having a wall thickness of 0.4 to 0.8 mm.

[0005]

In the floor structure according to the first aspect of the present invention, since the floor joists formed of square steel pipes are used, the warp in the longitudinal direction of the floor joists is greater than that when wooden floor joists are used. Also, the twist is reduced. Further, since the rectangular steel pipe can be stably obtained at a lower price than long wood, the material cost can be reduced as compared with the conventional one. Further, since the fastening material does not project on the upper surface of the floor joist, the floor material (particle board or the like) can be easily fixed to the upper surface of the floor joist.

In the floor structure according to the second aspect of the present invention, since the floor joists formed of hat-shaped steel are used,
Warp and twist in the longitudinal direction of the floor joists are reduced compared to the case where wooden floor joists are used. Further, since the hat-shaped shaped steel can be obtained more stably and at a lower price than long wood, the material cost can be reduced as compared with the conventional one.

In the floor structure according to the third aspect of the present invention, since the mounting rail made of a dovetail-shaped section steel is interposed between the floor beam and the floor joist, a screw for fixing the floor joist is provided. Etc. are unnecessary, and the supporting strength of the floor board is improved.

In the floor structure according to claim 4 of the present invention, the portion of the brim of the floor joist that intersects the floor beam is formed by a cut-and-raised piece provided on the upper surface of the floor beam. Since it is fastened and fixed to the upper surface, screws and the like for fixing the floor joists are unnecessary, and the floor joists can be attached to the floor beam with high strength.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION FIG. 1 is a perspective view of an essential part of a floor structure of the first embodiment, FIG. 2 is a sectional view of an essential part of the floor structure of the first embodiment, and FIG. 3 is a floor of the second embodiment. FIG. 4 is a perspective view of a main part of the floor structure according to the second embodiment, FIG. 5 is a perspective view of a main part of the floor structure according to the third embodiment, and FIG.
FIG. 7 is a perspective view of a main part of the floor structure according to the fourth embodiment, FIG. 8 is a cross-sectional view of the main part of the floor structure according to the fourth embodiment, and FIG. 5 is a perspective view of a main part of the floor structure of FIG.
FIG. 10 is a cross-sectional view of essential parts of the floor structure according to the fifth embodiment, and FIG.
Is a perspective view of a main part of the floor structure of the sixth embodiment, FIG. 12 is an exploded perspective view showing the structure of the building unit, and FIG. 13 is a plan view showing the floor structure.

First, the structure A of the building unit shown in FIG. 12 will be described. In the structure A of the building unit, four pillars 1 made of square steel pipes are arranged at four corners, and the four corners of the ceiling structure 3 are joined to the connecting pieces 2 made of grooved steel provided at the upper end of each pillar 1. In addition, the four corners of the floor structure 5 are joined to the connecting pieces 4 made of channel steel provided at the lower ends of the columns 1 to form a box-shaped framework.

The ceiling structure 3 has an outer frame formed by welding four ceiling girders 31 made of channel steel to the connecting piece 2. In addition, the ceiling girders 31 facing each other,
A plurality of ceiling beams 32 made of square timber are laid in parallel between 31. Each ceiling beam 32 is attached to the ceiling beam 31 at its both ends by a fixing tool (not shown) such as adhesive or nails. It is fixed. In addition, the ceiling structure 3
Although not shown in the figure, the ceiling plate is fixed below the ceiling beam 32 by adhesion or a fixture such as a nail.

The floor structure 5 has an outer frame formed by welding four floor girders 51 made of channel steel to the connecting piece 4. In addition, a plurality of floor beams 52 (52a, 52) made of square steel pipes are provided between the floor beams 51, 51 facing each other.
b, 52c) are laid in parallel, and each floor beam 52
In (52a, 52b, 52c), the connecting pieces 53 made of channel steel fixed to both ends of the floor girder 51 are welded.
It is fixed to. In addition, as shown in FIG. 13, the floor structure 5 includes the floor beam 52 (52a, 52b, 52).
c) a plurality of floor joists 54 (54a, 54b, 54)
Although not shown in the drawing, c) is arranged in a direction orthogonal to the floor beam 52, and these floor joists 54 (54a, 54b, 54)
The floor board is fixed on the c) by an adhesive or a fixing tool such as a nail.

The structure of the floor structure 5 described above is the same as the structure of the floor structure 5 of Japanese Patent Application Laid-Open No. 4-198538 described in the prior art. Hereinafter, in Embodiments 1 to 6,
The characteristic part of the floor structure 5 of the present invention will be described.

(First Embodiment) In the floor structure 5 of the first embodiment, as shown in FIGS. 1 and 2, a floor joist 54 is used.
a is formed of a square steel pipe, and is fixed to the upper surface portion of the floor beam 52a by a screw 6 that is longer than the vertical dimension of the floor joist 54a. A recess 541 for accommodating the head of the screw 6 is provided on the upper surface of the floor joist 54a.
The head does not protrude above the upper surface of the floor joist 54a. Further, the recesses 541 are respectively provided at the portions of the floor joists 54a that intersect the floor beam 52a, and a pilot hole 542 for passing the screw 6 is provided at the center of each recess 541.

(Embodiment 2) In the floor structure 5 according to Embodiment 2, as shown in FIGS.
b is formed of a rectangular steel tube having a hole 543 in the upper surface,
It is fixed to the upper surface portion of the floor beam 52a by a screw 6 inserted into the floor joist 54b through the hole 543. In addition,
The holes 543 are provided at the portions of the floor joists 54b that intersect the floor beam 52a.

(Third Embodiment) In the floor structure 5 of the third embodiment, as shown in FIG. 5 and FIG.
c is formed of a hat-shaped shaped steel consisting of an upper surface portion 544, a right side surface portion 545, a left side surface portion 546, and flange portions 547 and 548 extending outward from the lower end portions of these both side surface portions 545 and 546, and Collar parts 547 and 548 are screws 6
Is fixed to the upper surface of the floor beam 52a. The collars 547 and 548 do not need to be continuous in the length direction, and may be provided at least at the intersection with the floor beam 52a.

(Fourth Embodiment) In the floor structure 5 of the fourth embodiment, as shown in FIG. 7 and FIG.
c is of the floor beam 52a via the mounting rail 55 made of a dovetail-shaped shaped steel having locking portions 551, 552 on both sides of which the collar portions 547, 548 of the floor joist 54c can be inserted from the ends. It is attached to the upper surface. The mounting rail 55 is
The floor joists 5 are formed to have substantially the same length as the floor joists 54c.
2a is provided in a direction orthogonal to the floor girder 52a, and a portion orthogonal to the floor girder 52a is fixed to the upper surface of the floor girder 52a with screws 6. That is, since the mounting rail 55 made of dovetail-shaped steel is interposed between the floor beam 52a and the floor joist 54c, the supporting strength of the floor board is improved. The construction of the floor joist 54c is the same as that of the third embodiment.
The locking portions 551 and 552 on both side surfaces of the mounting rail 55 do not need to be continuous in the length direction, and may be partially present.

(Fifth Embodiment) In the floor structure 5 of the fifth embodiment, as shown in FIGS. 9 and 10, the floor beam 5 is used.
2b is made of U-shaped steel, and the portions of the collar portions 547 and 548 of the floor joist 54c that intersect the floor beam 52b are cut and raised on the edge of the upper surface of the floor beam 52b. The piece 521 is fastened and fixed to the upper surface of the floor beam 52b. Therefore, the floor joist 54c can be attached to the floor joist 52b with higher strength as compared with fixing the floor joist 54c to the floor joist 52b with a fixture such as a screw nail or a screw 6.
The construction of the floor joist 54c is the same as that of the third embodiment.

(Sixth Embodiment) In the floor structure 5 of the sixth embodiment, as shown in FIG. 11, a cut-and-raised piece 522 for fixing the floor joist 54c to the center of the upper surface of the floor beam 52c. Are formed. The rest of the configuration is the same as that of the fifth embodiment.

The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and changes in design and the like may be made without departing from the gist of the present invention. Even if it exists, it is included in the present invention. For example,
In the first to third embodiments, the screw is shown as the fixture for fixing the floor joist to the floor beam, but a screw nail, a rivet or the like may be used. Furthermore, in the fourth embodiment, the mounting rail is fixed to the floor girder with screws, but both may be caulked by a die and a punch. In the fifth and sixth embodiments, a screw or the like may be used to fix the cut-and-raised piece of the floor joist and the floor beam, or both may be caulked with a die and a punch.

[0021]

As described above, in the floor structure 5 of the present invention, since the warp and the twist of the floor joists are reduced, it is possible to request high accuracy, and the material of the floor joists can be used. Since it can be stably obtained at a low price, the material cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of a floor structure according to a first embodiment.

FIG. 2 is a cross-sectional view showing the main parts of the floor structure according to the first embodiment.

FIG. 3 is a perspective view showing a main part of a floor structure according to a second embodiment.

FIG. 4 is a sectional view showing a main part of a floor structure according to a second embodiment.

FIG. 5 is a perspective view showing a main part of a floor structure according to a third embodiment.

FIG. 6 is a cross-sectional view showing a main part of a floor structure according to a third embodiment.

FIG. 7 is a perspective view showing a main part of a floor structure according to a fourth embodiment.

FIG. 8 is a sectional view showing a main part of a floor structure according to a fourth embodiment.

FIG. 9 is a perspective view showing a main part of a floor structure according to a fifth embodiment.

FIG. 10 is a cross-sectional view showing the main parts of the floor structure according to the fifth embodiment.

FIG. 11 is a perspective view showing a main part of a floor structure according to a sixth embodiment.

FIG. 12 is an exploded perspective view showing a structure of a building unit.

FIG. 13 is a plan view showing a floor structure.

[Explanation of symbols]

 5 Floor structure 51 Floor large beam 52 (52a, 52b, 52c) Floor small beam 521, 522 Cut and raised piece 54 (54a, 54b, 54c) Floor joist 544 Upper surface part 545 Right side surface part 546 Left side surface part 547, 548 Collar part 55 Installation Rails 551,552 Locking part 6 Screw (fastening material)

Claims (4)

[Claims] 1. An outer frame is formed by floor girders, a plurality of floor girders are bridged in parallel between opposing floor girders, and a plurality of floor joists are orthogonal to the floor girders on the floor girders. In the floor structure arranged in parallel in the direction, at the intersection of the floor joist and the floor beam, both are fastened and fixed so that the fastening material does not project to the upper surface of the floor joist, and the floor joist is formed of a square steel pipe. A floor structure characterized by being present. 2. An outer frame is formed by floor girders, a plurality of floor girders are bridged in parallel between opposing floor girders, and a plurality of floor joists are orthogonal to the floor girders on the floor girders. In the floor structure arranged side by side in the direction, the floor joists, the upper surface portion,
A floor structure characterized by being formed of a hat-shaped shaped steel consisting of a right side surface portion and a left side surface portion, and a flange portion extending outward from the lower end portions of these both side surface portions. 3. The floor joists are attached to the upper surface of the floor joist through attachment rails having locking portions on both sides into which the flanges on both sides of the floor joists can be fitted. The described floor structure. 4. A portion of the brim portion of the floor joist that intersects with the floor beam is fastened and fixed to an upper surface portion of the floor beam by a cut-and-raised piece provided on an upper surface portion of the floor beam. The floor structure according to claim 2.