JP2003307018A - Steel floor structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a steel floor structure which achieves the entire weight reduction in spite of including steel floor joists. <P>SOLUTION: The steel floor structure K is formed of steel piers 10, steel sleepers 20, the steel floor joists 30, and floor panels 40. The steel sleeper 20 is a self-reinforced steel sleeper consisting of a first member B1 forming an upper surface 21, and a second member B2 forming side surfaces 22, 23 and a lower surface 24, wherein the upper surface 21 is connected to the side surfaces 22, 23 by calking. The steel floor joist 30 is a self-reinforced steel floor joist consisting of a first member B4 forming a lower surface 31, and a second member B4 forming side surfaces 32, 33 and an upper surface 34, wherein the lower surface 31 is connected to the side surfaces 32, 33 by calking. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a steel floor structure. More specifically, the present invention relates to a steel floor structure that is lightweight while ensuring desired strength.

[0002]

2. Description of the Related Art Conventionally, as a floor structure such as a first-floor floor set of a detached house or an apartment house, as shown in FIG.
The floor panel 104 in which the Daihiki 102 is supported by 1, and the joists 103 are arranged on the back surface of the Daihiki 102 at a predetermined pitch.
There is known a wooden floor structure 100 in which joists 103 are laid so that the joists 103 are orthogonal to the Daihiki 102.

This conventionally known wooden floor structure 10
Since Daihiki 102 and joist 103 in No. 0 are made of wood, there were the following problems.

(1) There is a problem due to so-called thin trees.
For example, there is a problem that floor thinning is caused by thin wood.

(2) It is necessary to carry out chemical treatment for anti-termite measures and antiseptic measures. There is a high possibility that environmental pollution will occur in the process of this chemical treatment. Further, since the chemical treatment may impair the health of workers engaged in it, it is necessary to take measures against it.

(3) Deterioration of the forest causes environmental deterioration.

In order to partially solve the problem of the conventional wooden floor structure 100, a proposal has been made and implemented in which the Daihiki 102 is made of steel.

For example, Japanese Unexamined Patent Publication No. 8-4253 discloses that
As shown in FIG. 10, a steel plate is bent and formed so that its cross section has a substantially inverted trapezoidal shape, and reinforcing ribs 11 are formed on both side surfaces.
1 has been proposed. Further, in Japanese Patent Application Laid-Open No. 2000-73527, as shown in FIG. 11, a steel steel bar 120 is formed by bending a steel plate so that its cross section has a substantially rectangular shape and providing reinforcing ribs 121 on both side surfaces. Is proposed.

However, by replacing the wooden Daibiki 102 with the steel Daibiki 110, 120, since the wooden joists 103 still exist, the problem in the wooden floor structure 100 is only partially solved. No, it is hard to say that everything has been resolved.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a steel floor structure in which all the problems of the wooden floor structure are solved.

[0011]

The steel floor structure of the present invention comprises:
A steel floor structure comprising a steel bundle, a steel haul, a steel joist, and a floor panel, wherein at least the steel haul is a self-reinforcing steel haul. Is characterized by.

In the steel floor structure of the present invention, the steel hauling is composed of, for example, a first material constituting the upper surface and a second material constituting the side surface and the lower surface, and the upper surface and the side surface are caulked. Are joined together by. In that case, it is preferable that the plate thickness of the second material is smaller than the plate thickness of the first material.

Further, in the steel floor structure of the present invention, it is preferable that the steel joists be self-reinforced steel joists.

Further, in the steel floor structure of the present invention,
The steel joist comprises, for example, a first material forming a lower surface and a second material forming a side surface and an upper surface, and the lower surface and the side surface are joined by caulking. In that case, it is preferable that the plate thickness of the second material is smaller than the plate thickness of the first material.

Further, in the steel floor structure of the present invention,
It is preferable that the steel bundle receiving bracket is configured to function as a reinforcing member for the steel rafts.

Further, in the steel floor structure of the present invention,
The joining of steel joists to floor panels preferably comprises joining with an adhesive.

Further, in the steel floor structure of the present invention,
It is preferable that the steel joists are joined to the steel haul with a cushioning material.

Further, in the steel floor structure of the present invention,
It is preferable that the steel bundle of the steel haul is attached to the receiving metal member through a cushioning material.

[0019]

Since the steel floor structure of the present invention is constructed as described above, all problems in the wooden floor structure are solved. Moreover, since it is not necessary to take anti-termite measures, productivity and workability are improved. Further, since the steel rafts are self-reinforced steel rafts, the ribs on the side surface, the upper surface and the lower surface of the steel rafts are auxiliary. As a result, the ribs on the side surface, the upper surface and the lower surface of the steel haul are only required for the purpose of identification such as center indication and screw position indication.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described based on the embodiments with reference to the accompanying drawings, but the present invention is not limited to such embodiments.

FIG. 1 is a perspective view showing a main part of a steel floor structure according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view thereof.

The steel floor structure K is, as shown in FIG. 1, a steel raft supported by a steel sheave 10 on an earth concrete or a bundle foundation (not shown). ) 20 are arranged at a predetermined pitch, for example, 900 mm pitch (floor panel width interval), and a steel joist having a predetermined length (for example, floor panel length) along the longitudinal direction on the back surface (hereinafter sometimes simply referred to as joist). ) 30 is a predetermined pitch, for example 300 m
Floor panel 40 of a predetermined size arranged at m pitches, for example, floor panel 40 of 900 mmWx1800 mmL size
Are laid out so that their longitudinal direction is orthogonal to the large pull 20.

As shown in FIG. 3, the steel pull 20 has a substantially rectangular cross section (70 mmW × 80 mmH in the illustrated example), and the first material B1 forming the upper surface 21.
And a second material B2 that forms both side surfaces 22 and 23 and the lower surface 24. The upper surface 21 side end portion and the side surfaces 22 and 2
3 The upper end is joined by caulking.

That is, as shown in FIG. 3, the end portion on the upper surface 21 side is bent downward inward to form a lateral U-shaped engaging portion 21a, while the upper end portion of the side surface 22 (23) is formed into the lateral U-shaped portion. A lateral U-shaped engaging portion 22a (23) that is opposite to the engaging portion 21a.
a) and both engaging portions 21a, 22a (21a, 23a)
After they are engaged, they are caulked and joined. Further, as shown in FIG. 3, the upper surface portions located behind the engaging portions 22a and 23a at the upper ends of the side surfaces 22 and 23 are V-shaped.
The recessed portion 21b is shaped like a recess, so that the caulking portion 25 formed by the upper end portions of the side surfaces 22 and 23 and the end portion on the upper surface 21 side does not disengage. The reason why the caulking portion 25 is located on the upper surface 21 side will be described later.

Here, the first material B1 is a steel plate (plate thickness: 0.8 mm) that has been subjected to rust prevention treatment. For example, hot-dip zinc-5% aluminum plated steel plate (plate thickness: 0.8 m
m), high-corrosion molten zinc-6% aluminum-3% magnesium-plated steel sheet (sheet thickness: 0.8 mm) and the like.
The second material B2 is a steel plate (plate thickness:
0.7 mm). For example, hot-dip galvanized-5% aluminum-plated steel sheet (sheet thickness: 0.7 mm), high corrosion-resistant hot-dip zinc-6% aluminum-3% magnesium-plated steel sheet (sheet thickness: 0.7 mm), and the like.

As shown in FIG. 4, the steel joist 30 has a substantially rectangular cross section (50 mmW × 45 mmH in the illustrated example), and the first material B3 forming the lower surface 31.
And a second material B4 forming both side surfaces 32, 33 and an upper surface 34, and the lower surface 31 side end portion and the side surfaces 32, 3
3 The lower end is joined by caulking.

That is, as shown in FIG. 4, the end portion on the lower surface 31 side is bent upward inward to form a lateral U-shaped engaging portion 31a, while the lower end portion of the side surface 32 (33) is formed into the lateral U-shaped portion. A lateral U-shaped engaging portion 32a (33, which is opposite to the engaging portion 31a).
a) and both engaging portions 31a, 32a (31a, 33a)
After they are engaged, they are caulked and joined. Further, as shown in FIG. 4, the lower surface portion of the lower end portion of the side surface 32 (33) located behind the engaging portion 32a (33a) is formed into a V-shaped recess 31b, which is the lower end portion of the side surface 32 (33). The caulking portion 35 formed by the end portion on the lower surface 31 side is prevented from being disengaged. The reason for setting the caulking portion 35 on the lower surface 31 side will be described later.

Here, the first material B3 is a steel plate (plate thickness: 0.8 mm) that has been subjected to rust prevention treatment. For example, hot-dip zinc-5% aluminum plated steel plate (plate thickness: 0.8 m
m), high-corrosion molten zinc-6% aluminum-3% magnesium-plated steel sheet (sheet thickness: 0.8 mm) and the like.
In addition, the second material B4 is a steel plate (plate thickness:
0.7 mm). For example, hot-dip galvanized-5% aluminum-plated steel sheet (sheet thickness: 0.7 mm), high corrosion-resistant hot-dip zinc-6% aluminum-3% magnesium-plated steel sheet (sheet thickness: 0.7 mm), and the like.

FIGS. 5 and 6 show a mounting portion F of the steel bundle 10 of the steel rafts 20 to the receiving metal fittings 11 and a joint portion J between the steel rafts 20 and the steel joists 10.

As shown in FIGS. 5 and 6, the Daihiki 20 is attached to the receiving metal fitting 11 of the steel bundle 10 through the cushioning material 12 such as a polyolefin single-sided adhesive tape at the Taihiki bottom 20a. This is done by screwing the fitted bottom portion 20a with the drill screw 13 projecting from the bottom surface of the bottom of the receiving metal fitting 11 in a state of being fitted to the groove-shaped receiving metal fitting 11.

In this case, since the large pulling side surface 22 (23) is a thin plate from the viewpoint of weight reduction, the large pulling side surface 22 (23) tends to curve outward when a load is applied to the large pulling side 20. It is in. If this curve becomes too large, a problem will occur in terms of strength, so the plate thickness of the receiving metal fitting 11 is made considerably thick here, for example, to a plate thickness of about 4.5 mm, and the length along the large pull 20. By making L longer than usual in relation to the plate thickness, for example, 120 mm
As a length (normal length is about 80 to 100 mm), the outward pulling of the large pulling side surface 22 (23) is suppressed. That is, the catch 11 has a large pulling side surface 22 (2
It has a function as a reinforcing member of 3). Further, the shape of the receiving metal fitting 11 is a groove shape as shown in FIG.
It is preferable from the viewpoint of suppressing the curvature of the large pulling side surface 22 (23).
As a result, the plate thickness of the side surface 22 (23) is reduced, and the desired strength is secured without placing a large load on the reinforcing rib on the side surface 22 (23). By the way, when the shape of the receiving metal fitting 11 is flat, the receiving metal fitting 11 cannot exhibit a satisfactory function as a reinforcing member for the pulling bar 20.

Further, it is preferable from the viewpoint of strength that the caulked portion 25 of the haul 20 is mounted on the receiving metal fitting so that the caulked portion 25 of the haul 20 is located at the upper portion, as shown in FIG. This is because the caulking portion 25 functions as a reinforcing member when the joist 30 is placed on the large pulling upper surface 21. In this way, the first material B1 such as the caulking portion 25 and the second material B1
In the present specification, a steel raft whose joint with the material B2 functions as a reinforcing member is referred to as a self-reinforcing steel raft.

Arrangement of joists 30 on the back surface of the floor panel 40 is as follows.
It is preferable that the caulking portion 35 of the joist 30 is located outside. This is because when the floor panel 40 is placed on the large pull 20, the caulking portion 35 functions as a reinforcing member, and the floor panel 40 can have a desired bending rigidity while reducing the weight of the joist 30. Because you can. In this specification, the steel joists whose joints between the first material B3 and the second material B4 such as the caulked portion 35 function as reinforcing members are referred to as self-reinforced steel joists in the present specification.

As shown in FIG. 2, the joist 30 is arranged on the back surface of the floor panel 40 by using both an adhesive 41 and a screw 42. This is because by bonding the joist upper surface 34 to the back surface of the floor panel 40, the joist 30 and the floor panel 40 are integrated and the flexural rigidity of the floor panel 40 is increased. This is because the panel 40 can have a desired bending rigidity.

The floor panel 40 is fixed to the large pull 20 by placing the joists 30 at right angles to the large pull 20 and placing it on the large pull 20 via a cushioning material 27 such as a polyolefin single-sided adhesive tape. By using a drill screw insertion hole 43 formed in 40 corresponding to the joining position with the Daihiki 20, the drill screw 44 is penetrated from the joist upper surface 34 to the Daihiki upper surface 21 to form the joist lower surface 31 and the Daihiki upper surface 21. It is made by screwing and joining.

As described above, the steel floor structure K of this embodiment is used.
In the above, since the joist 30, the large pulling 20, and the floor bundle 10 are all made of steel, all the problems in the wooden floor structure 100 described above are solved. Further, since the Daihiki 20 and joists 30 are both self-reinforcing, the steel floor structure K can be made lighter and the structure thereof can be simplified while ensuring a desired strength. Furthermore, Daihiki 20 and joist 3
Since the 0 crimped portions 25 and 35 form the joint portion J between the large pulling 20 and the joist 30 so as to function as a reinforcing portion, the weight saving of the steel floor structure K is promoted. Further, due to this weight reduction, the steel floor structure K exhibits rigidity and elasticity, and proper hardness of the floor can be maintained.

The present invention has been described above based on the embodiments, but the present invention is not limited to such embodiments, and various modifications can be made. For example, in the embodiment, the upper surface 21 of the Daibiki 20 is arranged over the entire range in the longitudinal direction of the Daibiki 20, but as shown in FIG.
It is also possible to use the large drawing 20A in which the above are dispersedly arranged only in a necessary range. Also, the lower surface 31 of the joist 30 is similarly
As shown in FIG. 8, a joist 30A may be formed by dispersively arranging only in a necessary range. Further, in the embodiment, the first material B1 and B3 and the second material B2 and B4 of the large haul 20 and the joist 30 are both made of the same material.
The materials B1 and B3 and the second materials B2 and B4 can be different materials. For example, the first materials B1 and B3 can be stainless steel plates, and the second materials B2 and B4 can be ordinary steel plates. By disposing the first materials B1 and B3 in a dispersed manner, it is possible to further reduce the weight while ensuring a desired strength.

[0038]

As described in detail above, according to the present invention,
The excellent effect is that all the problems in the wooden floor structure are eliminated.

Since it is not necessary to take anti-termite measures, the excellent effect of improving productivity and workability can be obtained.

Furthermore, since the steel rafts are self-reinforced steel rafts, the construction of the steel rafts can be simplified,
It is also possible to obtain an excellent effect that the weight is reduced and the productivity is further improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a steel floor structure according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the relevant part.

FIG. 3 is a front view of a steel raft used in the steel floor structure according to the embodiment.

FIG. 4 is a front view of a steel joist used in the steel floor structure according to the same embodiment.

FIG. 5 is a front view of a joint portion between a haul and a joist of the steel floor structure according to the same embodiment.

FIG. 6 is a side view of a joint portion between a large pull and a joist of the steel floor structure according to the same embodiment.

FIG. 7 is a perspective view of another example of Daihiki applicable to the steel floor structure of the present invention.

FIG. 8 is a perspective view of another example of joists applicable to the steel floor structure of the present invention.

FIG. 9 is a perspective view of a main part of an example of a conventional wooden floor structure.

FIG. 10 is a cross-sectional view of a steel hauling proposed in Japanese Patent Laid-Open No. 8-4253.

FIG. 11 is a cross-sectional view of a steel hauling proposed in Japanese Patent Laid-Open No. 2000-73527.

[Explanation of symbols]

10 steel bundle 11 Bracket 20 Steel Daihiki 20a bottom 21 upper surface 21a engaging part 21b depression 22 and 23 sides 22a, 23a engaging part 25 Caulking part 30 steel joists 31 Lower surface 31a engaging part 31b depression 32,33 side 32a, 33a engaging portion 35 Caulking part 40 floor panel K steel floor structure B1, B3 1st material B2, B4 2nd material

Claims (10)

[Claims] 1. A steel floor structure comprising a steel bundle, a steel raft, a steel joist, and a floor panel, wherein at least the steel raft is a self-reinforcing steel raft. The steel floor structure is characterized by being 2. A steel pulling member comprising a first member constituting an upper surface,
The steel floor structure according to claim 1, wherein the steel floor structure is composed of a second material that constitutes a side surface and a lower surface, and the upper surface and the side surface are joined by caulking. 3. The steel floor structure according to claim 2, wherein the plate thickness of the second member is smaller than that of the first member. 4. The steel floor structure according to claim 1, wherein the steel joists are self-reinforced steel joists. 5. A steel joist, a first member constituting a lower surface,
The steel floor structure according to claim 4, wherein the steel floor structure comprises a second material forming a side surface and an upper surface, and the lower surface and the side surface are joined by caulking. 6. The steel floor structure according to claim 5, wherein the second material is thinner than the first material. 7. The steel floor structure according to claim 1, wherein the steel bundle receiving bracket is configured to function as a reinforcing member for the steel rafts. 8. The steel floor structure of claim 1, wherein joining the steel joists to the floor panel comprises joining with an adhesive. 9. The steel floor structure according to claim 1, wherein the steel joists are joined to the steel haul with a cushioning material. 10. The steel floor structure according to claim 1, wherein the steel bundle of steel hauling is attached to the receiving metal fitting through a cushioning material.