JPH10231563A - Underfloor ventilation structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an underfloor ventilation structure in which ventilation under the floor can be performed above the foundation, in which an execution property can be improved, and in which height of the foundation can be set lower. SOLUTION: In an underfloor ventilation structure, an inside water drip material 31 of which lower end edge is fixed on a runner 16 provided on an upper surface of a continuous footing 11, and of which upper end edge is fixed on an outer surface of a base piece 13, and an outside water drip member 21 forming a ventilation passage B to the inside water drip member 31 and the continuous footing. In an upper part of the inside water drip member 31, a ventilation hole 31 to communicate the ventilation passage B with a ventilation passage A formed in a part of the sill piece 13 on the continuous footing 11 is provided.

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, and more particularly, to an underfloor ventilation structure capable of performing underfloor ventilation of a building at a base portion above a foundation.

[0002]

BACKGROUND OF THE INVENTION Generally,
Ventilation under the floor of a building is performed by providing a ventilation hole having a predetermined opening area at an appropriate height position on a cloth foundation. However, in this structure, ventilation holes must be formed at the same time when constructing the fabric foundation, which is not only troublesome but also requires ventilation holes at a certain height from the ground to avoid the effects of wind and rain. Because of the necessity of the provision, the height of the cloth foundation had to be higher than the required strength.

[0003] Accordingly, the present invention provides an underfloor ventilation structure capable of performing underfloor ventilation at the upper part of a foundation (cloth foundation), improving workability and reducing the height of the foundation. It is an object.

[0004]

In order to achieve the above object, the underfloor ventilation structure according to the present invention is characterized in that a base drainer provided on the outside of the base at the lower end of the outer wall is provided with an external drainer on the outer side and an internal drainer on the inner side. The inner drainer is fixed to a runner provided with a lower end edge on a base upper surface in a watertight state and an upper end edge is fixed to an outer surface of a base. The outer drainer has an inner surface and an outer surface of the inner drainer. Between and between the lower edge thereof and the upper surface of the foundation so as to form a predetermined ventilation passage, and the upper edge is fixed to the outer surface of the base together with the upper edge of the internal drainage material, A vent hole communicating with a ventilation passage formed in a base portion provided on the foundation is provided above the internal drainage material.

[0005]

1 to 6 show an example of an underfloor ventilation structure according to the present invention. FIG. 1 is a longitudinal sectional view, FIG. 2 is a perspective view showing a drainage fixing portion, and FIG. FIG. 4 is a front view of the internal draining member viewed from the inside, FIG. 5 is a perspective view of a spacer provided between the external draining member and the internal draining member, and FIG. FIG.

The underfloor ventilation structure shown in this embodiment is a cloth foundation 1
This is provided on the outer side of the building between the outer wall 1 and the outer wall 12, and is formed by an outer drainer 21 on the outer side of the building and an inner drainer 31 on the inner side. In the base part corresponding to the underfloor ventilation structure construction position, a plurality of base pieces 13 of channel steel having a predetermined size are provided on the upper surface of the cloth foundation 11 at appropriate intervals in the longitudinal direction. Is a ventilation passage A communicating below the building floor.
On the base piece 13, a joist 14 or the like is fixed, and a column or the like is attached to the joist 14 in the same manner as in the related art.

The internal drainer 31 is formed by bending a thin metal plate into a predetermined shape, and has a mounting edge 32 at an upper edge, a vertical plate portion 33 continuous with the mounting edge 32, and a lower end of the vertical plate portion 33. A horizontal plate portion 34 bent outward from the outer side, an inclined side 35 projecting obliquely downward from an outer end of the horizontal plate portion 34, and an inclined side 3
5 has a water return side 36 bent inward from the lower end thereof, and a fixed side 37 bent downward from the inner end of the water return side 36. The vertical plate portion 33 has a large number of ventilation holes. 38 are provided. The internal drainage material 31 is screwed on the mounting side 32 of the upper edge to the mounting plate 15 provided on the outer surface of the base 14, and the fixed side 37 of the lower edge is mounted on the runner 16 provided on the upper surface of the cloth base 11. It is mounted in a predetermined position by fitting and fixing in a watertight state.

The external draining member 21 is made of a metal sheet similarly bent and formed, and has a mounting side 22 at an upper end edge and a horizontal plate portion 23 bent outward from a lower end of the mounting side 22. A slanted side 24 projecting obliquely downward from the outer end of the horizontal plate portion 23, and a draining part 25 bent downward from the lower end of the slanted side 24 and further bent obliquely upward from the lower end toward the inside. The upper edge of the mounting side 22
Is fixed to the outer surface of the mounting plate 15 together with the mounting side 32 of the inner drainer 31 with screws between the inner surface of the outer drainer 21 and the outer surface of the inner drainer 31 and the lower end of the drainer 25. It is formed in a shape that can form a predetermined space to be a ventilation passage B between the upper surface of the cloth base 11 and the upper surface.

Further, the outer drainer 21 and the inner drainer 3
Between them, spacers 41 are provided at predetermined intervals to maintain the interval between them and to reinforce them. As shown in FIG. 5, the spacer 41 includes an outer support piece 42 that contacts the inner surface of the inclined side 24 of the outer drainer 21, an inner support piece 43 that contacts the outer surface of the inclined side 35 of the inner drainer 31, And a connecting piece 44 for connecting them. In addition, at the ends of both draining materials 21 and 31,
A lid member 45 that connects the two to reinforce the ends and forms a bottom joint when connecting the ends of the underfloor ventilation structures to the outer wall or connecting the underfloor ventilation structures.
Is installed. This lid member 45 is used for the inner drainer 3
It has a fixing piece 46 extending from the outer surface of the first attachment side 32 to the outer surface of the fixed side 37, and a lid 47 formed according to the end shape of the external drainer 21.

The outer drainer 21 and the inner drainer 31
Is transported together with the spacer 41 and the lid member 45 to the site in an integrated state by means of ultrasonic welding or a bonding agent such as an adhesive. At the site, an appropriate position of the mounting sides 22 and 32 is set at, for example, 30 cm intervals. By fixing the fixed side 37 of the internal drainer 31 and the runner 16 by fitting together with the runner 16, it can be installed at a predetermined position on the base of the building. In addition, an extruded product of polyvinyl chloride or the like can be used for the runner 16, and the fixing to the cloth base 11 can be performed by an adhesive or the like. Further, the fixed side 37 and the runner 16 can be fixed by fitting only, or by using fitting and bonding together. Further, the connection between the lower end portion of the outer wall 12 and the connection between the underfloor ventilation structural members (connection between the lid members 45 at the end portions) may include the backup material 17 as necessary, as shown in FIGS. By using and filling the caulking material 18, it is possible to obtain a good rain finish without deteriorating the appearance. Further, in the construction, it is only necessary to attach the integrated drainer unit to a predetermined position, so that the workability can be improved as compared with the related art.

In the underfloor ventilation structure thus formed, air for underfloor ventilation flows through the ventilation passage B between the external draining member 21 and the internal draining member 31, the ventilation hole 38 and the ventilation passage A between the base pieces 13. After going in and out of the floor, the rainwater
From the lower end of the drainer 25 of the external drainer 21 to the runner 16
It falls up and is prevented from entering under the floor. In addition, even when rain is blown by the wind, it is possible to prevent rainwater from entering at the water return side 36 of the internal drainer 31 or the like.

Therefore, since the height of the cloth foundation 11 can be adjusted to a height corresponding to the required strength, the cloth foundation 11 can be made lower than before, and the height of the building, the limitation of the diagonal lines, and the like can be reduced. The response is also easy, and the ceiling height of the room can be increased.

By appropriately setting the shape and installation interval of the base piece 13 and the opening diameter and the number of the ventilation holes 38 of the internal drainage material 31, the underfloor ventilation function can be provided for the drainage provided substantially over the entire circumference of the building. And sufficient and uniform underfloor ventilation can be performed. Furthermore, the design of the building can be improved as compared with the case where the ventilation holes are provided in the cloth foundation 11.

FIG. 7 is a longitudinal sectional view showing another embodiment of the present invention. In the present embodiment, the ventilation holes 38 provided in the internal drainer 31 are formed in the vertical plate portion 33 and the horizontal plate portion 34.
In this manner, by providing the ventilation holes 38 over both the plate portions 33 and 34, a necessary opening area can be obtained even if the height of the draining portion is reduced, and the floor height of the building can be further reduced. Can be. Since other parts can be formed in the same manner as in the above-described embodiment, corresponding components are denoted by the same reference numerals and detailed description thereof will be omitted.

The ventilation passage A provided in the base portion
Can adopt an optimal structure depending on the structure of the building, for example, a wooden structure, a steel frame structure, etc. In addition to the piece-shaped base member shown in the above-described embodiment, for example, in the case of a steel frame structure, The ventilation passage A can be formed by providing an appropriate number of through holes of an appropriate size in the formed steel frame material.

[0016]

As described above, according to the underfloor ventilation structure of the present invention, sufficient underfloor ventilation capacity can be obtained, workability and design can be improved, and the foundation height can be reduced. Therefore, the degree of freedom in building design can be improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an example of an underfloor ventilation structure of the present invention.

FIG. 2 is a perspective view showing a drainer fixing portion.

FIG. 3 is a perspective view showing a draining material connection portion.

FIG. 4 is a front view of the internal draining member viewed from the internal side.

FIG. 5 is a perspective view of a spacer.

FIG. 6 is a cross-sectional view of a connecting portion.

FIG. 7 is a longitudinal sectional view showing another embodiment of the present invention.

[Explanation of symbols]

11 ... cloth foundation, 12 ... outer wall, 13 ... base piece, 14 ...
Joist, 15: mounting plate, 16: runner, 17: backup material, 18: caulking material, 21: external draining material,
22: mounting side, 23: horizontal plate part, 24: inclined side, 25:
Drainer, 31 ... Internal drainer, 32 ... Mounting side, 33
... vertical plate part, 34 ... horizontal plate part, 35 ... inclined side, 36 ... water return side, 37 ... fixed side, 38 ... vent hole, 41 ... spacer,
42 ... external support pieces, 43 ... internal support pieces, 44 ... connecting pieces,
45 ... lid material, 46 ... fixed piece, 47 ... lid part, A, B ... ventilation passage

Claims (1)

[Claims] 1. A base drainer provided on an outer side of a base at a lower end portion of an outer wall is formed by an external drainer on an outer side and an internal drainer on an inner side, and the lower end of the internal drainer is provided on an upper surface of a foundation. The upper end edge is fixed to the outer surface of the base while being fixed to the runner in a watertight state, and the outer draining material is provided between the inner surface thereof and the outer surface of the internal draining material and between the lower edge thereof and the upper surface of the foundation. The upper end edge is fixed to the outer surface of the base together with the upper end edge of the internal draining material, and the ventilation formed on the base portion provided on the foundation above the internal draining material. An underfloor ventilation structure characterized by providing ventilation holes communicating with the passages.