JPH09100584A - Construction method of thermal insulation and air-tight structure of building using i-beams - Google Patents

Abstract

PROBLEM TO BE SOLVED: To contrive low cost by disposing and fixing a plurality of I-beams on a groundsill or the like at regular intervals, and providing air-tight material in a space formed between the beams and heat insulating material. SOLUTION: A plurality of I-wood beams 10 are disposed and fixed on a groundsill or a crossbeam at regular intervals. Heat insulating material 15 is formed between webs of the mutually neighboring I-beams, the heat insulating material 15 composed of polyurethane, polyethylene foam or polystyrene foam is inserted in a space and both sides along the longitudinal direction of the lower part 16 of the heat insulating material 15 is mounted on a lower part flange 13. Next, one liquid type foaming synthetic resin such as polyurethane resin is injected, foamed and solidified in a slender V-groove-like space 18 formed between the trapezoid-like upper part 17 of the heat insulating material 15 and the web 11 of the I-beam 10 and air-tight material 19 is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a heat insulating and airtight structure for a building using an I-shaped beam or an inverted T-shaped beam.

[0002]

2. Description of the Related Art FIGS. 6 and 7 are sectional views of a heat insulating and airtight structure in a roof of a conventional wooden building, respectively. The example of FIG. 6 is of the type of “inner insulation” in which heat is insulated by a heat insulation layer, for example, in a space (01) between many rafters (00) arranged in parallel, for example, glass wool. A heat insulating material (02) such as the above is filled, and a panel or sheet forming a moisture-proof layer (03) is attached to the lower surface of the rafter (00). An airtight sheet (05) may be attached to the lower surface of the moisture-proof layer (03).

A panel consisting of a veneer plate (04) and the like is laid on the upper surface of the rafter (00), and this panel is provided with a large number of ventilation furring strips (06) arranged in parallel with the upper surface. A ventilation path (07) is formed between the waterproof layer (08) made of a veneer plate and the like, and a roofing material (09) is further spread on the uppermost part.

The example shown in FIG. 7 is of the type of "outer heat insulation" in which heat insulation is performed by a heat insulation layer on the outside.
On the upper surface of the panel, a panel composed of a veneer plate (04), an airtight sheet (05) and a heat insulating material (02) are sequentially laid, and a ventilation furring strip (06) arranged in parallel to the upper surface and the upper surface thereof. The ventilation path (07) is formed by the panel made of the veneer plate (08) and the like, which is further attached to the roof material (09).
Has been deployed.

Since the shape and structure of the roof vary greatly depending on the building, it is difficult to standardize the members, and an efficient structure that can maintain heat insulation and airtightness can be obtained only by manual work suitable for each building. Absent.

In Japan, due to its geographical position, the amount of solar radiation on the roof is large and the amount of rainfall is large, which is incomparable to those of Canada and the Nordic countries. For this reason, a great deal of labor is required, for example, it is necessary to provide a ventilation furring strip on the heat insulating material, and to further cover it with veneer to finish the roof. This kind of work is almost the same in the construction of a floor with a heat insulating and airtight structure.

[0007]

SUMMARY OF THE INVENTION According to the present invention, it is difficult to standardize, and therefore, the cost is high for a member, and the conventional heat insulating and airtight structure is improved to a structure which can be standardized as much as possible. By adopting the same construction method that is inexpensive and simple, simple construction is possible.
The purpose is to shorten the delivery time and reduce the labor cost. Further standardized work can improve and stabilize the quality, thereby aiming to obtain an efficient heat insulating and airtight structure. In addition, the present invention, up to now, a heat insulating and airtight layer that has been formed by taking separate steps,
It is also an object that the ventilation layer and the ventilation layer can be formed simultaneously and easily, the number of man-hours for construction work can be reduced, and rationalization can be achieved.

[0008]

According to the present invention, the above-mentioned problem is solved as follows. (1) In each space formed between the I-shaped beams arranged in parallel at regular intervals, a plate-shaped heat insulating material whose lower part is wider than the upper part is provided. After being inserted so as to be placed on the upper surface of the lower flange and at this time so that both side portions of the upper portion form suitable elongated spaces with the webs of the I-shaped beams on both sides, a foaming resin is injected into the elongated spaces. By foaming and solidifying this, a large number of parallel I-shaped beams and the heat insulating material sandwiched between them are integrally and airtightly joined.

(2) In the above item (1), the I-shaped beam is
It is made of wood.

(3) In the above item (1) or (2), the I-shaped beam is horizontal so that it can be used as a joist on the floor.

(4) In the above item (1) or (2), the I-shaped beam is tilted and supported so that it can be used as a rafter for a roof.

(5) In the above item (4), a plate-shaped lower step portion having a thickness substantially equal to the plate thickness of the lower flange of the I-shaped beam is formed in a portion corresponding to the cross beam on the lower surface of the heat insulating material. When the I-shaped beam is tilted and placed on the cross beam,
The lower surface of the lower portion is in close contact with the cross beam.

(6) In any one of the above items (1) to (5), holes for ventilation, etc. are formed at appropriate positions in the web of the I-shaped beam so as to cross the I-shaped beam at right angles.

(7) In any one of the above items (1) to (6), instead of the I-shaped beam, a substantially inverted T-shaped beam having a widening flange only at the lower end of the vertical piece is used.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to specific examples shown in the accompanying drawings.

[Embodiment 1] FIG. 1 shows a basic structure applicable to both a roof and a floor. That is, the known wood I-shaped beam (10) has an upper flange (12) and a lower flange (13) that sandwich the web (11) and its upper and lower sides, respectively.
It is composed of For floors, lower flange
(13) is fixed to the base or cross girder (not shown) with nails or the like.

When ventilation, piping, or insertion of a reinforcing material is required in the direction orthogonal to the I-shaped beam (10), the web
A hole (14) is formed at an appropriate position in (13).

It is assumed that many I-shaped beams (10) are arranged at regular intervals to form a floor joist. It should be noted that, instead of the I-shaped beam (10), an inverted T-shaped structure in which a widening flange is provided only on the lower end of the hanging piece, similar to the case where the upper flange (12) is removed from the I-shaped beam (10). Beam (not shown)
May be used.

As shown in FIG. 2, the construction for heat insulation and airtightness is as follows. First, as shown in FIG.
It begins with the provision of an insulating material (15) made of a material such as polyurethane foam, polyethylene foam, or polystyrene foam, which is approximately equal to the distance between them. Then, as shown in FIG. 1, when the heat insulating material (15) is inserted into the space formed between the webs (11) adjacent to each other, the heat insulating material (15) extends along the longitudinal direction of the lower part (16). Both side parts rest on the upper surface of the lower flange (13) on both sides. At this time,
The trapezoidal upper part (17), which is connected to the upper part of the lower part (16) and has a slightly narrow upper end, has an upper part of another heat insulating material which is adjacent to the web (11) and longitudinally. 17) and V
A groove-shaped space (18) is formed. The upper part (17) is the lower part (16)
The plate may have a narrower width, and a step may be formed between the upper part (17) and the lower part (16). In this case, the space (18) has a slit shape with the same vertical width.

Into this space (18), a one-liquid foamable synthetic resin, such as polyurethane resin, is injected and foamed and solidified to form an airtight material (19). If this is the floor,
The joist (10) and the heat insulating material (15) are integrally airtightly joined together, and in the case of a roof, the rafter (10) and the heat insulating material (15) are integrally airtightly joined together.

[Embodiment 2] Construction for heat insulation and airtightness maintenance on a roof using a wooden I-shaped beam (11) as a rafter, first of all, as shown in FIG. A plurality of I-shaped beams (10) which are parallel to each other are tilted and mounted and fixed by nails or the like.

Next, as shown in FIGS. 4 and 5, the width of the middle portion (23) is almost equal to the distance between the opposing webs (11), for example, polyurethane foam, polyethylene foam, or polystyrene foam. A heat insulating material (22) made of a material is prepared. The upper part of this insulation (22)
(Corresponding to the upper part (17) of the heat insulating material (15)) (24) is formed in a trapezoidal shape with a width and length slightly smaller than the above-mentioned middle part (corresponding to the lower part (16)) (23). And the lower portion (25) has the same thickness as the lower flange (13) of the I-shaped beam (10), and its width is the lower flange (13) of the adjacent I-shaped beam (10). The distance between the opposite side surfaces of is substantially the same.

The heat insulating material (22) is attached to the web (1) of the I-shaped beam (10).
1) Insert into the space formed between them. Then
The middle part (23) of the heat insulating material (22) has its both sides in the longitudinal direction placed on the upper surface of the lower flange (13) of the I-shaped beam (10) on both sides, and at this time, the longitudinal part of the upper part (24). A suitable elongated space (26) is formed between both sides in the direction and the webs (11) of the I-beam (10) on both sides, and the lower portion (25) includes the left and right lower flanges (13). Fit in between.

Then, a one-liquid foaming resin (27) is injected into the elongated space (26), and this is foamed and solidified to sandwich a large number of parallel I-shaped beams (10) between them. The heat insulating material (22) that has been heat-insulated is integrally and airtightly adhered, and the lower part of the inclined I-shaped beam (10) and the heat insulating material (22)
By injecting a foaming resin into the triangular space (28) formed between the lower surface of (23) and the upper surface of the cross girder (20) that secures these, and making it foam and solidify, a hermetic seal is obtained. A material (29) is formed and both are integrally and airtightly joined.

In FIG. 3, the triangular space (28) is shown in a state before being filled with the foamable resin in order to facilitate understanding of the structure.

[0026]

【The invention's effect】

(a) The cost of materials can be reduced by improving the construction of the conventional heat-insulating and airtight structure, which was difficult and expensive to standardize, to a structure that enables standardization as much as possible.

(B) By making it possible to apply the same construction method to both the roof and the floor, the delivery time can be shortened and the labor cost can be reduced.

(C) By standardized work, quality improvement and stability can be obtained, whereby an efficient heat insulating and airtight structure can be obtained.

(D) It is possible to simultaneously and easily form the heat insulating and airtight layer and the ventilation layer, which have been formed by taking time and effort separately until now, thereby reducing the man-hours of the construction work and rationalizing. Can be achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an essential part of a first embodiment of a method of constructing a heat insulating and airtight structure for a building according to the present invention.

2 is a perspective view of a heat insulating material used in the first embodiment shown in FIG. 1. FIG.

FIG. 3 is a perspective view of a main part of a roof in a second embodiment, in which the present invention is applied to a method of constructing a heat insulating and airtight structure for a roof, as viewed from the lower rear side.

FIG. 4 is a perspective view of a heat insulating material used in the second embodiment shown in FIG.

5 is a vertical sectional view of the portion shown in FIG. 3 as viewed from the right side.

FIG. 6 is a vertical cross-sectional view showing an example of a conventional method for thermally insulating the inside of the roof of a wooden house.

FIG. 7 is a vertical cross-sectional view showing an example of an external heat insulating construction method for a roof of a conventional wooden house.

[Explanation of symbols]

 (00) Tarpaulin (01) Cavity space (02) Thermal insulation layer (03) Moisture proof layer (04) Veneer board (05) Airtight sheet (06) Ventilation edge (07) Ventilation path (08) Waterproof layer (09) Roofing material (10) I-beam (11) Web (12) Upper flange (13) Lower flange (14) Hole (15) Insulation (16) Lower (17) Upper (18) Groove-like space (19) Airtight Material (20) Cross beam (22) Insulation (23) Middle part (lower part) (24) Upper part (upper part) (25) Lower part (26) Space (27) Foaming resin (28) Groove space (29) ) Airtight material

Claims (7)

[Claims] 1. A plate-shaped heat insulating material having a lower part wider than an upper part is provided in each space formed between I-shaped beams arranged in parallel at a constant interval, and the lower part of the plate-shaped heat insulating material has I-shaped parts on both sides. After inserting it so that it is placed on the upper surface of the lower flange of the beam and at this time, both sides of the upper part form appropriate elongated spaces with the webs of the I-shaped beams on both sides, a foaming resin is inserted into the elongated space. By injecting and foaming and solidifying this,
A large number of parallel I-shaped beams and a heat insulating material sandwiched between them are integrally and airtightly joined to each other.
A method of constructing a heat-insulating and airtight structure for a building using a shaped beam. 2. A method for constructing a heat insulating and airtight structure for a roof of a building using the I-shaped beam according to claim 1, wherein the I-shaped beam is made of wood. 3. The heat-insulating and airtight structure for a building using an I-shaped beam or the like according to claim 1 or 2, wherein the I-shaped beam is horizontal so that it can be used as a joist of the floor. Construction method. 4. A heat-insulating and airtight structure for a building using an I-shaped beam according to claim 1 or 2, wherein the I-shaped beam is supported so as to be inclined so that it can be used as a roof rafter. Construction method of structure. 5. A plate-shaped lower step portion having a thickness substantially equal to the plate thickness of the lower flange of the I-shaped beam is formed in a portion of the lower surface of the heat insulating material corresponding to the transverse beam, and the I-shaped beam is inclined. The method for constructing a heat-insulating and airtight structure for a roof of a building using an I-shaped beam according to claim 4, wherein the lower surface of the lower portion is brought into close contact with the transverse girder when placed on the transverse girder. 6. A building using an I-shaped beam or the like according to any one of claims 1 to 5, wherein a hole for ventilation, etc. orthogonal to the I-shaped beam is formed in an appropriate position on the web of the I-shaped beam. Insulation and airtight construction method. 7. The I-shaped beam according to claim 1, wherein a substantially inverted T-shaped beam having a widening flange only at the lower end of the vertical piece is used instead of the I-shaped beam. A method of constructing a heat-insulating and air-tight structure for a building using such as.