JP3045822B2 - Underfloor ventilation structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underfloor ventilation structure for a building, and more particularly to a underfloor ventilation structure for a building having a first-floor balcony provided outside a building body.

[0002]

2. Description of the Related Art Conventionally, one of a building body supported by an outer cloth foundation is supported on the outside of a building body supported by an inner cloth foundation.
In a building provided with floor balconies, a portion of the inner cloth foundation and the outer cloth foundation exposed from the ground,
In each case, a ventilation hole through which air can flow is provided, and the outside of the outer cloth foundation and the underfloor inside the inner cloth foundation communicate with each other through the ventilation hole, thereby performing ventilation under the floor of the building.

[0003]

However, in order to provide the ventilation holes in the outer cloth foundation and the inner cloth foundation, concrete is cast on site to form the outer cloth foundation and the inner cloth foundation. In addition, there has been a problem in that a complicated process such as previously supporting a sleeve for a ventilation hole in a predetermined position has to be performed, and much labor is required for foundation work.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and in a building having a first-floor balcony on the outside of a building body, a complicated process for ensuring underfloor ventilation is minimized. It is an object of the present invention to provide an underfloor ventilation structure that can omit a basic construction work.

[0005]

The underfloor ventilation structure according to the first aspect of the present invention provides a structure in which the outside of the outer fabric foundation on which the first floor balcony is supported and the underfloor inside the inner fabric foundation on which the building body is supported. In communication, the lower end surface of the handrail portion located above the outer cloth foundation is provided higher than the upper end surface of the outer cloth foundation to provide a ventilation gap through which air can flow, and the ventilation gap is provided through the ventilation gap. The outside of the outer fabric foundation is communicated with the underfloor inside the inner fabric foundation to provide ventilation under the floor of the building.

The underfloor ventilation structure according to the second aspect is the first aspect.
In the underfloor ventilation structure described in the above, ventilation holes are provided so that air can flow through the exposed portion of the inner cloth foundation, and the outside of the outer cloth foundation and the underfloor inside the inner cloth foundation are communicated through the ventilation holes. It is configured to provide ventilation under the floor of the building.

[0007]

According to the underfloor ventilation structure of the first aspect, the lower end surface of the handrail located above the outer cloth foundation on which the first floor balcony is supported is made higher than the upper end surface of the outer cloth foundation. A ventilation gap is provided so that air can flow,
Since the outside of the outer fabric foundation and the underfloor inside the inner fabric foundation where the building body is supported are communicated through the ventilation gap, ventilation holes are not required in the outer fabric foundation. When casting the concrete to form the outer fabric foundation, it is not necessary to go through a complicated process for providing ventilation holes.

According to the underfloor ventilation structure of the second aspect, a ventilation hole through which air can flow is provided in the exposed portion of the inner cloth foundation, and the outside of the outer cloth foundation and the inside of the inner cloth foundation are provided through the ventilation hole. Is communicated with the underfloor of the building, and the ventilation hole ventilates the underfloor of the building.

[0009]

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of the underfloor ventilation structure in the present embodiment, and FIG. 2 is a cross-sectional view along II-II in FIG.

The underfloor ventilation structure according to the present embodiment is in a building in which a first-floor balcony B is provided outside a building body A (excluding a first-floor balcony B), and is as follows. That is, as shown in FIG. 1 and FIG.
The outside C of the outer fabric base 100 supporting the floor balcony B and the underfloor D inside the inner fabric foundation 200 supporting the building body A communicate with each other to provide ventilation under the floor of the building. Specifically, the upper end surface 100a of the outer cloth foundation 100
And the lower end surface 3 of the handrail wall 300 of the handrail portion located above
Vent gap 1 so that air can flow between the space 1
50 are provided. The outside C communicates with the underfloor E of the first-floor balcony B through the ventilation gap 150.
Ventilation holes 250 through which air can flow are provided in the inner cloth foundation 200.
Is provided. The underfloor E and the underfloor D are communicated through the ventilation hole 250.

The ventilation gap 150 is formed in the lower end surface 30.
Beam 40 of the balcony B for the first floor in a state in which the handrail wall 300 is floated so that the upper rail 100b does not contact the upper end surface 100a.
It is formed by being supported by a handrail support metal fitting 390 via the handrail support hardware 390.

The beam 400 is supported on the outer fabric base 100 via a plurality of beam fittings 480 leveled by a leveling mortar 490 or the like. Since the beam mounting hardware 480 is provided at predetermined intervals along the longitudinal direction of the beam 400, a ventilation gap 450 through which air can flow is formed between the beam 400 and the outer fabric base 100. ing. The gusset plate receiving plate 680 welded to the beam 400 has the floor panel 50 of the balcony B for the first floor.
One end 600 a of the joist 600 supporting the “0” is fastened via a gusset plate 690. Joist 60
0 is supported by the inner cloth foundation 200. The reference numerals 670 and 675 in the figure denote bolts and nuts, respectively.

The beam mounting hardware 480 is, for example, a short and hollow channel material, and includes an anchor bolt tightening portion 481, a nut screw opening 482, and a beam mounting portion 483.
The anchor bolt tightening portion 481 is provided with a bolt through hole 484, and the anchor bolt 1
10 are passed. The nut screwing opening 482 is open upward so that a nut 120 to be screwed into the anchor bolt 110 can be inserted or a wrench can be inserted to tighten the nut 120. The beam 400 is placed on the beam mounting portion 483 and welded.

The handrail supporting hardware 390 is, for example, a short angle material, and has a beam mounting portion 391 and a handrail mounting portion 392. The beam attachment portion 391 is welded to the upper flange 410 of the beam 400, for example. On the other hand, the handrail attachment 392
For example, the mounting base material 32 supporting the wall panel 310 of the handrail wall 300 by a known method using so-called lightning hardware.
0 is welded to the column 321.

The ventilation hole 250 is a well-known through hole formed in an exposed portion of the inner cloth foundation 200. Although not shown in FIG. 1, the ventilation holes 250 may be provided with scabs or the like, or may not be provided.

The components of the underfloor ventilation structure described above are assembled as follows. First, at the time of foundation work, a sleeve (not shown) for the ventilation hole 250 is previously supported at a predetermined position on the inner cloth foundation 200. Concrete is cast to form an outer cloth foundation 100 and an inner cloth foundation 200
make. The ventilation holes 250 are formed up to here. next,
A leveling mortar 490 is placed so as to surround the anchor bolts 110 of the outer cloth foundation 100, and the level of the outer cloth foundation 100 is leveled. After curing of the leveling mortar 490, the beam mounting hardware 480 is placed thereon. The nut 120 is screwed into the tip of the anchor bolt 110 passed through the bolt hole 484 and tightened. Beam 400 on beam mounting hardware 480
And weld it. Thereafter, a joist 600 is bridged between the beam 400 and the inner cloth foundation 200, and a floor panel 500 is laid thereon. Handrail support hardware 39 on beam 400
The support base material 320 is supported via the “0”. At this time, the welding position between the handrail mounting portion 392 and the pillar 321 is adjusted up and down, and the opening degree of the ventilation gap 150 is adjusted so that small animals and the like do not enter the floors D and E. The ventilation gap 150 is formed up to here. The wall panel 310 is supported by the mounting base material 320. FIGS. 1 and 2 show the state up to this point. Finally, if necessary, a waterproof sheet is attached to the upper surface of the floor panel 500, and finishing is performed thereon. Thus, the assembly of the first-floor balcony B and the underfloor ventilation structure is completed.

According to the above embodiment, a ventilation gap 150 is provided between the upper end surface 100a of the outer cloth base 100 and the lower end surface 300b of the handrail wall 300 located above the outer cloth base 100 so that air can flow. Therefore, ventilation holes are not required in the outer cloth foundation 100, so that it is not necessary to go through a complicated process for providing ventilation holes when casting the concrete on site to make the outer cloth foundation 100. Therefore, the inner cloth foundation 20
Since only the vent holes 250 need to be provided, the foundation work, which requires a great deal of time, is simplified as compared with the conventional case.

In the above embodiment, the ventilation gap 150 is supported by the beam 400 via the handrail support metal 390 with the handrail wall 300 floating.
Although it is assumed that it is formed, the present invention is not limited to this.
The handrail wall 300 may be supported in any manner as long as the handrail wall 300 is not brought into contact with the upper end surface 100a of the first handpiece 100, or the handrail support hardware 390 may be fixed by bolts and nuts instead of welding. .

In the above embodiment, the ventilation holes 250 are provided in the inner cloth foundation 200. However, the present invention is not limited to this. The inside cloth base 200 may be provided with an air passage having any structure, as long as the air is allowed to communicate with the underfloor E of the balcony B for use.

Further, in the above embodiment, the handrail wall 3
00 is composed of the wall panel 310 and the mounting base material 320, but is not limited to this. The mounting base material may be omitted, and a handrail, a cap, and a ground cover are provided. A fence-shaped handrail may be used.

Further, in the above embodiment, the beam 4
00 and the beam mounting hardware 480 are welded,
It is needless to say that the present invention is not limited to this, and may be fastened by, for example, bolts and nuts.

Further, in the above embodiment, the outer cloth foundation 100 and the inner cloth foundation 200 are formed by casting concrete on site, but the present invention is not limited to this. Precast concrete) may be the foundation. In this case, not only the on-site foundation work is further simplified, but also the manufacturing process of the PC foundation is simplified because no ventilation hole is required.

Further, in the above embodiment, the case where the beam 400 and the joist 600 are made of H-section steel has been described. However, the present invention is not limited to this, and may have any shape.

Although the underfloor ventilation structure according to the present invention is for underfloor ventilation of the first-floor balcony, it can also be applied to underfloor ventilation of the first-floor outer corridor such as an apartment.

[0025]

According to the underfloor ventilation structure according to the first and second aspects, the lower end face of the handrail located above the outer cloth foundation on which the first floor balcony is supported is higher than the upper end face of the outer cloth foundation. A ventilation gap is provided so that air can be circulated so that the outside of the outer cloth foundation and the underfloor inside the inner cloth foundation on which the building body is supported are communicated through the ventilation gap. Therefore, since ventilation holes are not required in the outer cloth foundation, it is not necessary to go through a complicated process for providing ventilation holes when casting the concrete on site to make the outer cloth foundation. Therefore, the number of places where the ventilation holes are provided is reduced, and the foundation work, which has required a great deal of time, is simplified as compared with the related art.

[Brief description of the drawings]

FIG. 1 is a sectional view of an underfloor ventilation structure according to an embodiment.

FIG. 2 is a sectional view taken along line II-II of FIG.

[Explanation of symbols]

 A Building body B Balcony for the first floor C Exterior D, E Under floor 100 Outer cloth foundation 100a Top end face 150 Ventilation gap 200 Inner cloth foundation 250 Ventilation hole 300 Handrail wall (handrail part) 300b Lower face

Continuation of the front page (56) References JP-A-3-187440 (JP, A) JP-A-3-194403 (JP, A) Japanese Utility Model Application No. 55-21360 (JP, U) Japanese Utility Model Application No. 55-150855 (JP , U) Japanese Utility Model Showa 57-131915 (JP, U) Japanese Utility Model Showa 57-137217 (JP, U) Japanese Utility Model Showa 56-84604 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB Name) E04B 1/70 E04B 1/00

Claims (2)

(57) [Claims] 1. A first-floor balcony is provided outside a building body supported by an inner cloth foundation while being supported by an outer cloth foundation, and outside the outer cloth foundation and under the floor inside the inner cloth foundation. In the underfloor ventilation structure in which ventilation is performed under the floor of the building by communicating with the outside cloth foundation, the lower end surface of the handrail portion located above the outer cloth foundation is made higher than the upper end surface of the outer cloth foundation so that air can flow. A ventilation gap provided between the outside cloth foundation and the inside floor of the inside cloth foundation through the ventilation gap. 2. A ventilation hole through which air can flow is provided in an exposed portion of the inner cloth foundation, and the outside of the outer cloth foundation and the underfloor inside the inner cloth foundation communicate with each other through the ventilation hole. The underfloor ventilation structure according to claim 1, wherein: