JP7303693B2 - Floor structures, buildings and beams - Google Patents

Description

The present invention relates to a building floor structure, a building and a beam.

Conventionally, as a floor structure of a building, for example, a floor slab such as an ALC panel is supported from below by a floor support beam that is held so as to be suspended from the top surface of a rising portion such as a continuous foundation. .

For example, Patent Document 1 discloses a central connecting member placed on the top surface of a continuous foundation, a pair of standing members extending downward from both ends of the central connecting member along both side surfaces of the foundation, and each standing member. a support member projecting outward from the lower end of the member; A floor structure has been proposed in which metal fittings are joined on each receiving member.

JP-A-7-3930

However, in the above floor structure, the floor support beams that receive the floor slabs are held so as to be suspended from the top surface of the foundation beams, so the underfloor space is divided by the floor support beams. As a result, it was difficult to secure sufficient space under the floor for equipment inspection and pipe laying.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a floor structure, a building, and a beam capable of securing a sufficient underfloor space for equipment inspection and pipe laying.

A floor structure according to the present invention includes a foundation beam, a floor support beam, and a floor slab,
The floor support beam is supported by spanning between the foundation beam and a foundation beam facing the foundation beam, and at least one end of the floor slab is supported by the floor support beam. There is
The floor support beam has a body portion that protrudes above the height of the upper end of the base beam, and a floor support portion that protrudes horizontally at a position lower than the upper end of the floor support beam,
At least one end of the floor slab is supported by the floor support portion.

In addition, in the floor structure of the present invention, the cross-sectional shape of the floor support beam is preferably hat-shaped.

Further, in the floor structure of the present invention, the floor structure further has floor slab positioning members,
The floor slab positioning member preferably has a wedge-shaped portion arranged between the floor slab and the adjacent floor support beam or between the floor slab and the wall slab.

Further, in the floor structure of the present invention, it is preferable that the lower ends of the floor slabs are positioned higher than the upper ends of the foundation beams.

Further, in the floor structure of the present invention, the upper end of the floor support beam is positioned below the upper end of the floor slab,
The floor slab positioning member has a connecting portion that connects the pair of wedge-shaped portions that are spaced apart, and the height of the upper end of the connecting portion is the same as the height of the upper end of the floor slab, or the height of the upper end of the floor slab is the same as that of the floor slab. It is preferably arranged so as to be lower than the height of the upper end of the floor slab.

Further, in the floor structure of the present invention, a floor support member for supporting the floor slab and a raising member for supporting the floor support member are arranged between the floor slab and the foundation beam. is preferred.

Further, in the floor structure of the present invention, it is preferable that the floor support member supporting the floor slab and the wall support member supporting the wall slab are a common member.

A building according to the present invention is characterized by comprising any of the floor structures described above.

A beam according to the present invention is a beam used as the floor support beam, and is characterized by having a hat-shaped cross section.

Advantageous Effects of Invention According to the present invention, it is possible to provide a floor structure, a building, and a beam capable of securing a sufficient underfloor space for equipment inspection and pipe laying.

1 is a cross-sectional view of a floor structure as one embodiment of the present invention; FIG. FIG. 2 is a perspective view showing a floor slab, a floor support beam, and a floor slab positioning member in the floor structure of FIG. 1; FIG. 2 is a perspective view showing only a floor support beam in the floor structure of FIG. 1; (a) is a front view of the floor support beam shown in FIG. 3, (b) is a plan view, and (c) is a left side view. (a) to (c) are side views showing modifications of the floor support beam. (a) to (g) are side views showing modifications of the floor support beam.

An embodiment of the present invention will be described below with reference to the drawings. In addition, the same code|symbol is attached|subjected to the structure which is common in each figure.

FIG. 1 shows a longitudinal section of a building 100 having a floor structure 1 of this embodiment.

Here, the overall configuration of the building 100 will be described as an example. Building 100 can be, for example, a two-story house with a steel frame. Also, the building 100 is composed of a foundation structure fixed to the ground and an upper structure fixed on the foundation structure.

The foundation structure is positioned below the upper structure and supports the framework thereof, and can be, for example, a reinforced concrete foundation. The superstructure consists of a framework (framework) composed of multiple columns and multiple beams that span between the pillars, outer walls arranged on the outer peripheral side of the frame, and placed on the beams that make up the frame. It can be configured to have a floor and a roof of each floor. It should be noted that the members constituting the frame can be standardized (standardized) in advance, manufactured in a factory in advance, and then transported to and assembled at a construction site.

The building 100 includes an outer wall 101 (peripheral wall) surrounding the outer periphery of the building 100. The outer wall 101 includes a plurality of panel-shaped outer wall materials 102 made of, for example, lightweight cellular concrete (ALC), and heat insulating materials that form a heat insulating layer. 103, an inner layer material 104, and the like.

As shown in FIG. 1 , the floor structure 1 in this embodiment includes foundation beams 10 , floor support beams 20 , floor slabs 30 , and floor slab positioning members 40 . 2 is a perspective view showing the floor support beam 20, the floor slab 30, and the floor slab positioning member 40 in the floor structure 1. FIG. 3 is a perspective view showing the floor support beam 20 alone in the floor structure 1, and FIGS. 4(a), (b), and (c) are a front view, a plan view, and a left side view ( end view).

The foundation beam 10 of this example can be configured by the rising portion of the foundation. In addition, the foundation beam 10 is not limited to the raised portion of the foundation as shown in the illustrated example, and may be configured, for example, as a raised portion of a continuous foundation having a T-shaped cross section, or may have another form. .

The floor support beam 20 can be a long member that is bridged and supported between the foundation beam 10 and the foundation beam 10 facing the foundation beam 10 . The floor support beams 20 may be placed directly on the top surfaces 10a of the foundation beams 10 facing each other, or may be supported by the foundation beams 10 via other members such as raising members 60, which will be described later. good. Also, the floor support beam 20 can be made of a metal member such as steel, but the material is not particularly limited and may be other than metal. Further, when the floor support beam 20 is made of a metal member such as steel, it is desirable that it is made of hot-dip zinc-aluminum-magnesium alloy plated steel plate with high corrosion resistance. , can increase durability.

The floor support beam 20 includes a main body portion 21 protruding above the height of the upper end of the base beam 10 (the top surface 10a in this example), and the upper end of the floor support beam 20 (the top surface of the top plate portion 21a in this example). 21t).

The floor support beam 20 of this example has a hat-shaped cross section (cross section) perpendicular to the longitudinal direction of the floor support beam 20 . Here, as shown in FIGS. 1 to 4, the "hat type" includes a central top plate portion 21a, a pair of side plate portions 21b and 21c extending downward from both ends of the top plate portion 21a, and a pair of side plate portions. It means a shape having a pair of flange-like floor support portions 22, 23 protruding outward from the lower ends of the portions 21b, 21c, and also includes a shape in which each portion is partially uneven. Note that the floor support beam 20 of this example has symmetrical end faces as shown in FIG. In the floor support beam 20 shown in FIGS. 1 to 4, a main body portion 21 is composed of a top plate portion 21a and a pair of side plate portions 21b and 21c. The cross-sectional shape of the floor support beams 20d, 20f, 20h, 20i, and 20j shown in FIGS. 6(a), (b), (e), (f), and (g) is hat-shaped. For example.

The floor slab 30 has at least one end 30 a supported by the floor bearing portions 22 and 23 of the floor bearing beam 20 . Both ends 30a and 30b of the floor slab 30 may be supported by the floor support portions 22 and 23 of the pair of floor support beams 20 facing each other. The floor slab 30 can be, for example, a panel-shaped (rectangular plate-shaped) floor material made of lightweight cellular concrete (ALC) or the like, but the material, shape, and the like are not particularly limited.

In the floor structure 1 shown in FIG. 1, one end portion 30a of the floor slab 30 is supported by the floor support portion 22 of the floor support beam 20, and the other end portion 30b is supported by another floor support member 50. As shown in FIG. The other end 30 b of the floor slab 30 may be placed on the top surface 10 a of the foundation beam 10 . That is, the other end 30b of the floor slab 30 may be directly supported by the foundation beam 10. As shown in FIG. Also, the other end 30b of the floor slab 30 may be supported by the floor bearing portions 22, 23 of another floor bearing beam 20. As shown in FIG.

Here, the floor support member 50 has a horizontally extending flat floor support portion 51 and a side wall portion 52 rising from one end of the floor support portion 51 . The end portion 30 b of the floor slab 30 is placed on the floor support portion 51 of the floor support member 50 . The floor support portion 51 is supported from below by the foundation beam 10 via the raising member 60 . The shapes of the floor support member 50 and the raised member 60 can be changed as appropriate.

The floor support member 50 of this example has the same shape (common member) as the wall support member 70 that supports the exterior wall material 102, so as to share the members. As a result, the number of parts can be reduced, so that the manufacturing cost of the parts can be reduced. In this example, a raised member 60 is arranged between the wall receiving member 70 and the foundation beam 10 .

The raising member 60 is arranged between the top surface 10a of the base beam 10 and the lower surface of the floor support portion 51 of the floor support member 50, and forms an air passage for ventilation between the base beam 10 and the floor support member 50. It is preferable that the shape is such that it can be In this example, a plurality of raising members 60 shorter in length than the floor receiving member 50 are arranged at intervals in the longitudinal direction of the floor receiving member 50, and the adjacent raising members 60 and 60 are arranged at intervals. The space between them becomes the air passage for ventilation. With such a configuration, it is possible to form a continuous ventilation passage over a wide area, compared to the case where a ventilation opening is provided in a part of the foundation. Although the raising member 60 of this example is configured by a square pipe member made of metal, the material and shape thereof can be changed as appropriate. When the raising member 60 is made of a metal member, there is an advantage that the raising member 60 is suitable for long-term use because it has higher durability than a member made of resin.

A positioning member 80 is arranged between the side wall portion 52 of the floor support member 50 and the floor slab 30 . The positioning member 80 includes a wedge-shaped portion 81 whose tip is narrower (thinner) than the base end side, and an engaging portion 82 that engages with the upper end of the side wall portion 52 of the floor support member 50 . The wedge-shaped portion 81 is inserted between the floor slab 30 and the side wall portion 52 of the adjacent floor support member 50 from the front end side, and arranged to widen the space between the floor slab 30 and the side wall portion 52 . The floor slab 30 can be positioned by the positioning member 80 having such a wedge-shaped portion 81 and the floor slab positioning member 40 .

The floor slab positioning member 40 is positioned between the floor slab 30 and the adjacent floor slab 30, between the floor slab 30 and the adjacent floor support beam 20, or between the wall slab (outer wall material 102) and the floor slab 30. , and is a member for positioning the floor slab 30 . The floor slab positioning member 40 can prevent the floor slab 30 from being dislocated. The wall slab is not limited to the exterior wall material 102 that forms the exterior wall 101, and includes, for example, a wall material that forms an indoor parting wall.

The floor slab positioning member 40 has at least one wedge-shaped portion 41 . The wedge-shaped portion 41 is narrower (thinner) on the distal end side than on the proximal end side. As shown in FIGS. 1 and 2, the wedge-shaped portion 41 is, for example, inserted between the floor slab 30 and a member such as the body portion 21 of the floor support beam 20 adjacent to the floor slab 30 from the front end side. It is arranged so as to widen the distance between members. The floor slab 30 can be positioned by the floor slab positioning member 40 having such a wedge-shaped portion 41 .

The floor slab positioning member 40 can be made of a material such as hard foam or rubber. In this case, the manufacturing cost is low and damage to the floor slab 30 during horizontal vibration can be suppressed. The material of the floor slab positioning member 40 is not particularly limited. The floor slab positioning member 40 shown in FIGS. 1 and 2 is composed of a pair of wedge-shaped portions 41 arranged parallel to each other with a space therebetween, and a connecting portion 42 connecting the base ends of the pair of wedge-shaped portions 41. It is As shown in FIG. 1, the connecting portion 42 is supported by the top plate portion 21a of the floor support beam 20 in the installed state. Note that the shape of the floor slab positioning member 40 can be changed as appropriate. For example, instead of connecting the pair of wedge-shaped portions 41 with the connecting portion 42, individual members each having a shape like the positioning member 80 shown in FIG. may be In addition, the floor slab positioning member 40 is not an essential component. You may make it fix to the receiving beam 20. FIG.

In the floor structure 1 of this embodiment, a floor support beam 20 spans between a pair of foundation beams 10 facing each other and has a main body portion 21 that protrudes above the height of the upper ends of the foundation beams 10; A floor slab 30 is supported by floor bearing portions 22 and 23 projecting horizontally at a position lower than the upper end of the floor bearing beam 20 (the top surface 21t of the top plate portion 21a). With such a configuration, since the underfloor space S is not divided by the floor support beams 20, a sufficient underfloor space S for equipment inspection and pipe laying can be secured.

Here, the lower end (lower surface 30d) of the floor slab 30 is preferably located higher than the upper end (top surface 10a) of the base beam 10. As shown in FIG. With such a configuration, a space for ventilation (ventilation path) can be formed between the floor slab 30 and the foundation beam 10 . Further, since the floor slab 30 as a whole is positioned above the foundation beam 10, a wider underfloor space S can be secured.

Similarly, the lower ends of the floor support beams 20 (the lower surfaces of the floor support portions 22 and 23) are also preferably positioned higher than the upper ends of the foundation beams 10 (top surface 10a). That is, since the entire floor support beam 20 is positioned above the foundation beam 10, a wider underfloor space S can be secured.

Further, as in the floor structure 1 of the present embodiment, when the floor support beams 20 are supported from below by the foundation beams 10 above the top surface 10a of the foundation beams 10, the floor support beams 20 are supported by the foundation beams. The floor support beam 20 is less likely to vibrate than when it is held so as to be suspended from the top surface 10 a of the floor support beam 20 . As a result, it is possible to suppress the generation of noise due to the vibration of the floor support beam 20, eliminate the need for a mechanism for suppressing the vibration of the floor support beam 20, and reduce the cost.

In addition, in the floor structure 1 of the present embodiment, the upper end of the floor support beam 20 (the top surface 21t of the top plate portion 21a) is positioned below the upper end of the floor slab 30 (the top surface 30c). It becomes easy to dispose the positioning member 40 so as not to protrude from the floor slab 30 . That is, the height of the upper end (top surface 42a) of the connecting portion 42 of the floor slab positioning member 40 is the same as the height of the upper end (top surface 30c) of the floor slab 30 or lower than the height of the upper end of the floor slab 30. It is preferable that they are arranged so as to be By preventing the floor slab positioning member 40 from protruding above the floor slab 30 in this way, it is difficult to interfere with the floor heat insulating material or the like arranged above the floor slab 30, so that the construction work such as finishing is facilitated. In this example, the top surface 42a of the connecting portion 42 is configured to be positioned on the same plane as the top surface 30c of the floor slab 30, thereby facilitating the construction such as the finishing described above.

Here, it is preferable that the height from the upper end to the lower end of the floor support beam 20 is smaller than the thickness of the floor slab 30 . According to this, it becomes easy to secure a wide underfloor space S, and it becomes easy to secure a space for arranging the floor slab positioning member 40 .

In addition, the floor support sections 22 and 23 are preferably provided at the lower ends of the floor support beams 20. This makes it difficult for the floor support beams 20 to protrude greatly downward from the floor slab 30, thereby reducing the underfloor space. It becomes easy to ensure a wide range of S.

Further, in the floor structure 1 of the present embodiment, the floor support beams 20 are arranged between the floor slabs 30 as shown in FIG. This makes it easier to join the pillars directly to the floor support beams 20, and eliminates the need for notching or the like for passing the pillars through the floor slab 30, thus making it possible to greatly reduce the labor for construction. In addition, if holes are provided in the floor support beams 20, they can be used as equipment wiring and piping spaces that penetrate the floor, and since there is no need to cut the floor slab 30, the labor for construction can be reduced. .

In addition, since the floor structure 1 of the present embodiment employs a dry construction method in which the floor slab 30 is positioned using the floor slab positioning member 40, compared to a wet construction method in which the floor slab 30 is positioned with mortar, Construction management is easy, and the construction period can be shortened. Moreover, it becomes easy to form a ventilation path between the floor slab 30 and the foundation beam 10 .

In addition, in the floor structure 1 of the present embodiment, the floor slab 30 is supported using the floor support beams 20, the floor support members 50, and the raising members 60 that are independent of the wall support members 70 that support the wall slabs such as the exterior wall materials 102. Thus, the height of the floor slab 30 can be set to a desired height without affecting the height of the wall slab.

Further, in this embodiment, the floor support beam 20 has a shape that can be formed simply by bending a single metal plate. With such a configuration, work such as welding or bolting is not required in the manufacturing process of the floor support beam 20, and the manufacturing cost of the floor support beam 20 can be reduced.

FIGS. 5(a)-(c) and FIGS. 6(a)-(g) are end views of floor support beams 20a-20j as modifications of the floor support beam 20 shown in FIGS. 1-4. Parts having the same basic functions as those of the floor support beam 20 described above are denoted by the same reference numerals in the drawings, and descriptions thereof are omitted.

A floor support beam 20a shown in FIG. 5(a) has a shape in which a lower flange 21e of H-shaped steel is extended to both sides. Specifically, the floor support beam 20a includes a horizontally extending top plate portion 21a (upper flange), a web 21d that hangs down from the center of the top plate portion 21a, and a lower end of the web 21d that extends parallel to the top plate portion 21a. lower flange 21e. Floor support portions 22 and 23 are provided at both end portions of a lower flange 21e that horizontally protrudes from the top plate portion 21a.

The floor support beam 20b shown in FIG. 5(b) has a flat plate 24 (a flat rectangular plate-shaped long member) fixed by welding or the like to the lower surface of a main body 21 made of a square pipe member. Specifically, the body portion 21 made of a square pipe member includes a central top plate portion 21a, a pair of side plate portions 21b and 21c hanging downward from both ends of the top plate portion 21a, and a pair of side plate portions 21b. , 21c. Further, both ends of the flat plate 24 fixed to the bottom plate portion 21f become the floor support portions 22 and 23. As shown in FIG.

The floor support beam 20c shown in FIG. 5(c) is obtained by fixing vertical portions of angle members 25 having an L-shaped cross section to both side surfaces of a body portion 21 made of a square pipe member by welding or the like. Horizontal portions of each angle member 25 become the floor receiving portions 22 and 23 .

A floor support beam 20d shown in FIG. 6A is an example of a hat shape. The floor support beam 20d includes a central top plate portion 21a, a pair of side plate portions 21b and 21c extending obliquely downward from both ends of the top plate portion 21a, and lower end portions of the pair of side plate portions 21b and 21c. a pair of lower horizontal portions 26a extending outward from the lower horizontal portions 26a, vertical portions 26b vertically rising from the outer ends of the lower horizontal portions 26a, and upper horizontal portions 26c horizontally extending outward from the upper ends of the vertical portions 26b. have A pair of upper horizontal portions 26c constitute floor support portions 22 and 23, respectively. The floor support sections 22 and 23 can be reinforced by forming a lower horizontal section 26a and a vertical section 26b that are continuous with the floor support sections 22 and 23 by bending a metal plate that constitutes the floor support beam 20d. It is possible to increase the rigidity in the longitudinal direction of the floor support beam 20d.

The floor support beam 20e shown in FIG. 6(b) is an example of a hat shape, and has a vertical portion 27a that hangs down from the outer end of each of the flange-shaped floor support portions 22 and 23, and a vertical portion 27a that extends downward from the lower end of the vertical portion 27a. and a horizontal portion 27b extending to the The floor support sections 22 and 23 can be reinforced by forming a vertical section 27a and a horizontal section 27b that are continuous with the floor support sections 22 and 23 by bending a metal plate that constitutes the floor support beam 20e. The longitudinal rigidity of the floor support beam 20e can be increased.

A floor support beam 20f shown in FIG. 6(c) is formed by joining two bent plate members 28a and 28b in the same shape as the floor support beam 20a shown in FIG. 5(a).

A floor support beam 20g shown in FIG. 6(d) is formed by bending downward both ends of a top plate portion 21a of the floor support beam 20f shown in FIG. 6(c) to form a vertical portion 21g. As a result, the top plate portion 21a can be reinforced, and the longitudinal rigidity of the floor support beam 20g can be increased.

A floor support beam 20h shown in FIG. 6(e) is an example of a hat shape, and a reinforcing rib 21h projecting downward is formed at the center of the top plate portion 21a by bending the top plate portion 21a. Thereby, the top plate portion 21a can be reinforced, and the longitudinal rigidity of the floor support beam 20h can be increased.

A floor support beam 20i shown in FIG. 6(f) is an example of a hat shape, and is an example of a shape in which a pair of side plate portions 21b and 21c of the floor support beam 20h shown in FIG. 6(e) are inclined.

The floor support beam 20j shown in FIG. 6(g) is an example of a hat shape, and is an example of a shape in which the width of the top plate portion 21a of the floor support beam 20 shown in FIG. 4(c) is reduced.

The present invention is not limited to the configurations of the above-described embodiments, and can be implemented in various configurations without departing from the scope of the claims. For example, in the above-described embodiment, the floor structure 1 of the first floor of the building 100 has been described, but the present invention is not limited to this. can also be used for floors.

1: Floor structure 10: Foundation beam 10a: Top surface of foundation beam (upper end of foundation beam)
20: Floor support beam 21: Body portion 21a: Top plate portion 21b, 21c: Side plate portion 21d: Web 21e: Lower flange 21f: Bottom plate portion 21g: Vertical portion 21h: Reinforcing rib 21t: Top surface of top plate portion (floor top of support beam)
22, 23: Floor receiving part 24: Flat plate 25: Angle member 26a: Lower horizontal part 26b: Vertical part 27a: Vertical part 27b: Horizontal parts 28a, 28b: Plate member 30: Floor slabs 30a, 30b: Edges of floor slabs Part 30c: Top surface of floor slab (upper end of floor slab)
30d: Lower surface of floor slab (lower end of floor slab)
40: Floor slab positioning member 41: Wedge-shaped portion 42: Connection portion 42a: Upper end of connection portion 50: Floor support member 51: Floor support portion 52: Side wall portion 60: Raising member 70: Wall support member 80: Positioning member 81: Wedge shape Part 82: Engagement part 100: Building 101: Outer wall 102: Outer wall material (wall plate)
103: Heat insulating material 104: Inner layer material S: Underfloor space

Claims (7)

A foundation beam, a floor support beam, a floor slab, and a floor slab positioning member ,
The floor support beam is supported by spanning between the foundation beam and a foundation beam facing the foundation beam, and at least one end of the floor slab is supported by the floor support beam. There is
The floor support beam has a body portion that protrudes above the height of the upper end of the base beam, and a floor support portion that protrudes horizontally at a position lower than the upper end of the floor support beam,
At least one end of the floor slab is supported by the floor support,
The upper end of the floor support beam is positioned below the upper end of the floor slab,
The floor slab positioning member includes a wedge-shaped portion arranged between the floor slab and the adjacent floor support beam or between the floor slab and the wall slab, and a pair of the wedge-shaped portions arranged at intervals. Having a connecting part that connects the parts,
The connecting portion connects the base end portion of the wedge-shaped portion and is arranged to cover the upper end of the floor support beam,
The upper end of the connecting portion is the upper end of the floor slab positioning member, and the height of the upper end of the connecting portion is equal to or lower than the height of the upper end of the floor slab. A floor structure characterized by being arranged . The floor structure according to claim 1, wherein the cross-sectional shape of the floor support beam is hat-shaped. The floor structure according to claim 1 or 2 , wherein the lower end of the floor slab is positioned higher than the upper ends of the foundation beams. 4. The method according to any one of claims 1 to 3, wherein a floor support member for supporting the floor slab and a raising member for supporting the floor support member are arranged between the floor slab and the foundation beam. Floor structure as described. 4. The floor structure according to claim 3, wherein the floor support member supporting the floor slab and the wall support member supporting the wall slab have the same shape . A building comprising the floor structure according to any one of claims 1 to 5. A beam as a floor support beam according to claim 1,
A beam characterized by having a hat-shaped cross section.

Images