JP7566269B1 - building - Google Patents

Abstract

To provide a building with excellent thermal insulation properties.
[Solution] A building 1 has an inner structure 3 including a pair of adjacent first and second inner vertical members 711, 712 that both extend vertically in a portion facing an outer wall 5, an outer structure 4 located between the inner structure 3 and the outer wall 5 and including a first outer vertical member 811 arranged side by side on the outer wall 5 side of the first inner vertical member 711 and extending vertically, and a second outer structural member 812 arranged side by side on the outer wall 5 side of the second inner vertical member 712 and extending vertically, an outer space S11 formed between the first and second outer vertical members 811, 812, and an inner space S11 formed between the first and second inner vertical members 711, 712, and a first space S1 having a thickness of 200 mm or more. A first insulation board 91 having a thickness of 200 mm or more is arranged in the first space S1.
[Selected figure] Figure 3

Description

Application of Article 30, Paragraph 2 of the Patent Act On December 26, 2023, the framework for the building was raised at the BBT Housing Park Jutopia Toyama Showroom (275 Nishiaraya, Toyama City, Toyama Prefecture).

The present invention relates to buildings.

For example, as described in Patent Document 1, a frame construction method that combines pillars (vertical members) and beams (horizontal members) has been widely known as a construction method for houses. In this type of frame construction, 4-inch or 3.5-inch pillars are generally used. Note that a 4-inch pillar is a pillar that is 120 mm square, and a 3.5-inch pillar is a pillar that is 105 mm square. In addition, a filling insulation method in which insulation boards are placed inside the walls is known as one method for ensuring insulation in such frame construction houses.

In recent years, high-insulation homes have been attracting a lot of attention due to the rising cost of energy such as electricity and gas. However, when using the filled insulation method, only insulation boards with a thickness of 120 mm or less can be used for 4-inch columns, and only insulation boards with a thickness of 105 mm or less can be used for 3.5-inch columns. In fact, currently it is common to use insulation boards with a thickness of 80 mm to 120 mm.

Japanese Patent Application Publication No. 08-270073

However, if only insulation boards with a thickness of 120 mm or less can be used, it is difficult to achieve even higher levels of insulation.

The present invention was made in consideration of these points, and aims to provide a building with excellent thermal insulation.

This objective is achieved by the following invention:

(1) In the part facing the exterior wall,
an inner body including a pair of adjacent first and second inner vertical members, both of which extend vertically;
an outer body located between the inner body and the outer wall, the outer body including a first outer vertical member arranged side by side on the outer wall side of the first inner vertical member and extending in a vertical direction, and a second outer vertical member arranged side by side on the outer wall side of the second inner vertical member and extending in a vertical direction;
A building comprising an outer space formed between the first outer vertical member and the second outer vertical member, and an inner space formed between the first inner vertical member and the second inner vertical member, and a first space having a thickness of 200 mm or more.

(2) The building described in (1) above, in which the first inner vertical member, the second inner vertical member, the first outer vertical member, and the second outer vertical member each have a thickness of 120 mm or more.

(3) The building described in (1) above, which has a first insulation board arranged in the first space and has a thickness of 200 mm or more and less than the thickness of the first space.

(4) The interior board material is further disposed on the indoor side of the inner skeleton,
The thickness of the first insulation board is smaller than the thickness of the first space,
The building described in (3) above, in which a gap is formed between the interior board material and the first insulation board.

(5) The building described in (4) above, in which the first insulation board is an outer insulation board arranged in the outer space and has the same thickness as the outer space, and an inner insulation board arranged in the inner space and has a thickness smaller than the thickness of the inner space.

(6) The outer insulation board is longer in the height direction than the inner insulation board,
The lower end of the outer insulation board is located lower than the lower end of the inner insulation board,
The building described in (5) above, wherein the upper end of the outer insulation board is positioned higher than the upper end of the inner insulation board.

(7) The inner body includes a first inner horizontal member located below the inner space, extending horizontally to connect the first inner vertical member and the second inner vertical member, and a second inner horizontal member located above the inner space, extending horizontally to connect the first inner vertical member and the second inner vertical member,
The outer structure includes a first outer horizontal member arranged side by side on the outer wall side of the first inner horizontal member at a lower side of the outer space, extending horizontally to connect the first outer vertical member and the second outer vertical member, and a second outer horizontal member arranged side by side on the outer wall side of the second inner horizontal member at an upper side of the outer space, extending horizontally to connect the first outer vertical member and the second outer vertical member,
The upper surface of the first outer cross member is located lower than the upper surface of the first inner cross member,
The building described in (6) above, wherein the underside of the second outer cross member is located above the underside of the second inner cross member.

(8) In the part facing the underfloor,
A pair of first and second horizontal members that extend horizontally and are adjacent to each other,
A second space formed between the first cross member and the second cross member and having a thickness of 200 mm or more;
The building described in (1) above, having a second insulation board arranged in the second space and having a thickness of 200 mm or more.

(9) The vehicle further includes a floor plate material disposed on the upper side of the first horizontal member and the second horizontal member,
The thickness of the second insulation board is smaller than the thickness of the second space,
The building described in (8) above, in which a gap is formed between the floorboard material and the second insulation board.

(10) In the part facing the roof,
A pair of third and fourth horizontal members that extend horizontally and are adjacent to each other,
A third space formed between the third cross member and the fourth cross member and having a thickness of 200 mm or more;
The building described in (1) above, having a third insulation board arranged in the third space and having a thickness of 200 mm or more.

According to this invention, a space of 200 mm or more can be easily formed by the outer space formed by the outer structure and the inner space formed by the inner structure, and an insulation board of 200 mm or more can be placed in the space. This results in a building with excellent insulation properties.

FIG. 2 is a vertical cross-sectional view showing the building of the first embodiment. FIG. 2 is a cross-sectional view showing a wall structure of a building. FIG. 2 is a cross-sectional view showing a wall structure of a building. FIG. 2 is a vertical cross-sectional view showing the thermal insulation structure of a portion facing the exterior wall of a building. FIG. 2 is a vertical cross-sectional view showing the thermal insulation structure of a portion of a building facing the underfloor. FIG. 2 is a vertical cross-sectional view showing the thermal insulation structure of a portion of a building facing the roof. A vertical cross-sectional view showing the foundation part of a building of the second embodiment.

First Embodiment
Fig. 1 is a vertical cross-sectional view showing a building of a first embodiment. Fig. 2 and Fig. 3 are horizontal cross-sectional views showing a wall structure of the building. Fig. 4 is a vertical cross-sectional view showing a thermal insulation structure of a portion facing an exterior wall of the building. Fig. 5 is a vertical cross-sectional view showing a thermal insulation structure of a portion facing the underfloor of the building. Fig. 6 is a vertical cross-sectional view showing a thermal insulation structure of a portion facing the roof of the building.

The building 1 shown in FIG. 1 is a one-story wooden frame panel structure (a structure in which a load-bearing wall is formed with a load-bearing surface material) that uses the ventilation insulation WB construction method. The ventilation insulation WB construction method is publicly known, so a brief explanation will be given. It is a construction method that provides ventilation layers on both the outside (outdoor side) and inside (indoor side) of the main insulation material, and introduces outside air into the inside ventilation layer when the outside temperature is high (summer), and does not introduce outside air into the inside ventilation layer when the outside temperature is low (winter). In other words, by switching the air flow between summer and winter, it is possible to maintain a comfortable indoor environment throughout the year. Note that the building 1 shown in FIG. 1 is an example of a building of the present invention, and of course, the building of the present invention is not limited to the building 1. For example, it may be a building with two or more stories, or a wooden frame structure (a structure in which a load-bearing wall is formed with diagonal braces).

The building 1 has a foundation 2, an inner structure 3 fixed onto the foundation 2, an outer structure 4 fixed onto the foundation 2 and positioned outside the inner structure 3, an exterior wall 5 positioned on the outer periphery of the outer structure 4, and a roof 6 positioned above the inner structure 3 and the outer structure 4.

The inner structure 3 mainly comprises a base 31 fixed to the rising edge of the foundation 2 with anchor bolts or the like, joists 32 arranged horizontally alongside the base 31, beams 33 supporting the joists 32 from below, a number of columns 34 erected on the base 31, beams 36 connecting the columns 34 at a predetermined height, a ridge pole 37 and purlins 38, and rafters 39 supported by the ridge pole 37, purlins 38 and beams 36 (eaves beams). Although not shown, the roof 6 is formed by fixing sheathing boards onto the rafters 39 and then fixing roofing material onto the sheathing boards.

As shown in FIG. 2, the columns 34 include through columns 341 arranged at the four corners of the building 1, pipe columns 342 arranged between adjacent pairs of through columns 341, and partition columns 343 arranged between adjacent pairs of pipe columns 342. Of these, the through columns 341 and the pipe columns 342 are 4-inch columns, that is, square timbers with a size of 120 mm. However, this is not limited to this, and for example, the through columns 341 and the pipe columns 342 may be 3.5-inch columns (square timbers with a size of 105 mm) that are thinner than the 4-inch columns, or 4.5-inch columns (square timbers with a size of 135 mm) that are thicker than the 4-inch columns. In addition, the partition columns 343 have the same thickness as the through columns 341 and the pipe columns 342. In other words, in this embodiment, the thickness of the partition columns 343 is 120 mm.

As shown in FIG. 1, among the structural materials that make up the inner body 3, the beams 33 and the columns 34 are the inner vertical members 71 that extend vertically, and the base 31, joists 32, beams 36, ridgepole 37, and purlins 38 are the inner horizontal members 72 that extend horizontally. However, the inner vertical members 71 are not limited to the above (columns 34) as long as they are structural materials that extend vertically. Similarly, the inner horizontal members 72 are not limited to the above (base 31, joists 32, beams 36, ridgepole 37, and purlins) as long as they are structural materials that extend horizontally, and may also include, for example, window frames (window sills, lintels), trusses, etc.

In the field of the present invention, the foundation 31 may not be included in the cross members, but in this specification, for convenience of explanation, the foundation 31 is included in the inner cross member 72. In addition, in the field of the present invention, a distinction is sometimes made between the beams 36, with those that extend in the girder direction (the direction in which the ridge beam 37 extends) being called "girders" and those that extend in the beam direction perpendicular to the girder being called "beams," but in this specification, for convenience of explanation, they are referred to as "beams" without distinction. The same applies to the outer structure 4, which will be explained next.

Above, we have explained the inner body 3. Next, we will explain the outer body 4.

As shown in FIG. 1, the outer body 4 is located outside the inner body 3 described above, and is arranged so as to cover the outer periphery of the inner body 3. The outer body 4 has a base 41 fixed to the rising part of the foundation 2 by anchor bolts or the like, a number of columns 44 erected on the base 41, and beams 46 connecting the multiple columns 44 at a predetermined height.

As shown in FIG. 2, the columns 44 include through columns 441 arranged at the four corners of the building 1, pipe columns 442 arranged between adjacent pairs of through columns 441, and partition columns 443 arranged between adjacent pairs of pipe columns 442. Of these, the through columns 441 and the pipe columns 442 are 4-inch columns, that is, square timbers measuring 120 mm square. However, this is not limited to this, and for example, the through columns 441 and the pipe columns 442 may each be 3.5-inch columns that are thinner than the 4-inch columns, or 4.5-inch columns that are thicker than the 4-inch columns. In addition, the partition columns 443 have the same thickness as the through columns 441 and the pipe columns 442. In other words, in this embodiment, the thickness of the partition columns 443 is 120 mm.

The outer structure 4 is fixed to the inner structure 3 at specified locations using metal fittings or the like. By fixing the outer structure 4 to the inner structure 3, they become an integrated rigid body, which increases the strength of the building 1.

As shown in FIG. 1, among the structural materials that make up the outer structure 4, the columns 44 are outer vertical members 81 that extend vertically, and the sills 41 and beams 46 are outer horizontal members 82 that extend horizontally. However, the outer vertical members 81 are not limited to the above (columns 44) as long as they are structural materials that extend vertically. Similarly, the outer horizontal members 82 are not limited to the above (sills 41, beams 46) as long as they are structural materials that extend horizontally, and may also include, for example, window frames (window sills, lintels), trusses, etc.

Above, the outer structure 4 has been described. In the building 1, as shown in FIG. 1, the load-bearing surface material 11 is fixed to the outer peripheral surface of the outer structure 4. The outer surface of the load-bearing surface material 11 is covered with a waterproof sheet (not shown). Furthermore, the exterior wall 5 is fixed to the load-bearing surface material 11 from above the waterproof sheet via vertical furring strips 12. The gap G1 formed between the load-bearing surface material 11 and the exterior wall 5 by the vertical furring strips 12 constitutes an air-permeable layer located on the outside (outdoor side) of the main insulation material (the first insulation board 91 described later) in the ventilation insulation WB construction method.

In addition, in the building 1, an interior board material 14 is fixed to the inner peripheral surface of the inner framework 3. The interior board material 14 is moisture-permeable, for example, gypsum board. By using the moisture-permeable interior board material 14 in this way, moisture in the room is discharged through the interior board material 14 into the gap G2 described below.

Next, the thermal insulation structure of the building 1 will be described. As shown in Figures 3 and 4, in the portion facing the exterior wall 5 of the structure, the inner structure 3 has a pair of horizontally adjacent first inner vertical members 711 and second inner vertical members 712, and a pair of first inner horizontal members 721 and second inner horizontal members 722 that connect the first and second inner vertical members 711, 712 at a predetermined vertical height. The inner structure 3 has a rectangular inner space S12 surrounded by the first and second inner vertical members 711, 712 and the first and second inner horizontal members 721, 722. As mentioned above, the thickness of the column 34 is 120 mm, so the thickness of the inner space S12 is also 120 mm.

The first and second inner vertical members 711, 712 are each inner vertical members 71, and in the illustrated example, the first inner vertical member 711 is a stud 343, and the second inner vertical member 712 is a pipe column 342. The first and second inner cross members 721, 722 are each inner cross members 72, and in the illustrated example, the first inner cross member 721 is a base 31, and the second inner cross member 722 is a beam 36. However, the combination of the first and second inner vertical members 711, 712 and the combination of the first and second inner cross members 721, 722 are not limited to this.

On the other hand, the outer structure 4 has a pair of first outer vertical members 811 and second outer vertical members 812 adjacent to each other in the horizontal direction, and a pair of first outer cross members 821 and second outer cross members 822 that connect the first and second outer vertical members 811, 812 at a predetermined vertical height. The outer structure 4 has a rectangular outer space S11 surrounded by the first and second outer vertical members 811, 812 and the first and second outer cross members 821, 822. As mentioned above, since the thickness of the column 44 is 120 mm, the thickness of the outer space S11 is also 120 mm.

The first and second outer vertical members 811 and 812 are each outer vertical members 81, and in the illustrated example, the first outer vertical member 811 is a partition 443, and the second outer vertical member 812 is a pipe column 442. The first and second outer cross members 821 and 822 are each outer cross members 82, and in the illustrated example, the first outer cross member 821 is a foundation 41, and the second outer cross member 822 is a beam 46. However, the combination of the first and second outer vertical members 811 and 812, and the combination of the first and second outer cross members 821 and 822 are not limited to this.

As shown in FIG. 3, the first outer vertical member 811 is arranged side by side on the outside (exterior wall 5 side) of the first inner vertical member 711 and is fixed to the first inner vertical member 711 by a bolt not shown. The second outer vertical member 812 is arranged side by side on the outside (exterior wall 5 side) of the second inner vertical member 712 and is fixed to the second inner vertical member 712 by a bolt not shown. As shown in FIG. 4, the first outer cross member 821 is arranged side by side on the outside (exterior wall 5 side) of the first inner cross member 721 and is fixed to the first inner cross member 721 via the foundation 2. The second outer cross member 822 is arranged side by side on the outside (exterior wall 5 side) of the second inner cross member 722 and is fixed to the second inner cross member 722 by a bolt not shown.

Therefore, the outer space S11 and the inner space S12 overlap at that location to form the first space S1, which is connected to each other. As described above, the outer space S11 and the inner space S12 are each 120 mm thick, so the thickness of the first space S1 is 240 mm. By combining the inner body 3 and the outer body 4 to form the first space S1 in this way, the cost of the building 1 can be kept low compared to the case where the first space S1 is formed by, for example, forming the first inner vertical member 711 and the first outer vertical member 811 as a single column, forming the second inner vertical member 712 and the second outer vertical member 812 as a single column, forming the first inner cross member 721 and the first outer cross member 821 as a single base, and forming the second inner cross member 722 and the second outer cross member 822 as a single beam.

As shown in Figures 3 and 4, in the building 1, a first insulating board 91 made of foamed plastic is fitted into the first space S1. The thickness of the first insulating board 91 is 200 mm or more. By making the thickness of the first insulating board 91 200 mm or more, the building 1 has excellent thermal insulation properties. Furthermore, the thickness of the first insulating board 91 is equal to or less than the thickness of the first space S1, that is, equal to or less than 240 mm. In this way, by making the thickness of the first insulating board 91 equal to or less than the thickness of the first space S1, the first insulating board 91 does not protrude from the first space S1, and the first insulating board 91 fits well.

The first insulation board 91 has an outer insulation board 911 arranged in the outer space S11 and an inner insulation board 912 arranged in the inner space S12. Of these, the outer insulation board 911 has a thickness of 120 mm, which is the same thickness as the outer space S11. In contrast, the inner insulation board 912 has a thickness of 80 mm, which is smaller than the thickness of the inner space S12. In other words, the first insulation board 91 has a total thickness of 200 mm, which is 40 mm smaller than the thickness of the first space S1. In this way, by forming the first insulation board 91 by stacking the outer insulation board 911 and the inner insulation board 912, a first insulation board 91 with a thickness of 200 mm can be prepared inexpensively.

The first insulation board 91 is positioned close to the load-bearing surface material 11 so as to be in contact with the load-bearing surface material 11. Although not shown, the boundary between the inner insulation board 912 and the inner structure 3 is caulked from the inner side of the inner insulation board 912 to seal the gap and increase airtightness (insulation) and to fix the first insulation board 91 to the structure. The outer insulation board 911 and the inner insulation board 912 may be bonded together, or may not be bonded together and may simply be in contact with each other.

In this way, by positioning the first insulation board 91 closer to the load-bearing surface material 11, a gap G2 of 40 mm is formed between the first insulation board 91 and the interior board material 14. In the ventilation insulation WB method, the gap G2 constitutes an air vent layer located inside (indoor side) of the main insulation material (first insulation board 91). In addition, for example, the gap G2 may be used as a space for routing electrical wiring, air conditioner refrigerant pipes, etc.

Furthermore, the thickness (vertical length) of the first outer cross member 821 is smaller than the thickness (vertical length) of the first inner cross member 721, and the upper surface of the first outer cross member 821 is located lower than the upper surface of the first inner cross member 721. Similarly, the thickness (vertical length) of the second outer cross member 822 is smaller than the thickness (vertical length) of the second inner cross member 722, and the lower surface of the second outer cross member 822 is located higher than the lower surface of the second inner cross member 722.

Therefore, the outer space S11 is longer in the vertical direction than the inner space S12, with its lower end located below the lower end of the inner space S12 and its upper end located above the upper end of the inner space S12. Correspondingly, the outer insulation board 911 is longer in the vertical direction than the inner insulation board 912, with its upper end located above the upper end of the inner insulation board 912 and its lower end located below the lower end of the inner insulation board 912. With this configuration, a larger area can be secured for the outer surface (the surface facing the outer wall 5) of the first insulation board 91, thereby improving the insulation of the building 1.

The above describes the insulation structure in the portion facing the exterior wall 5 of the building 1. However, the insulation structure in this portion is not particularly limited. For example, the first insulation board 91 may be the same thickness as the first space S1, and the gap G2 may be omitted. Also, for example, a spacer may be sandwiched between the outer insulation board 911 and the inner insulation board 912, and these may be arranged at a distance to form an air layer between them. Also, the first insulation board 91 may be composed of one insulation board, or may be composed of three or more insulation boards. Also, the outer insulation board 911 may be the same length as the inner insulation board 912, or may be shorter than the inner insulation board 912.

Next, the heat insulation structure in the portion of the building 1 facing the underfloor (foundation 2) will be described. In this portion, as shown in FIG. 5, a pair of first and second cross members 731 and 732 are arranged next to each other. A rectangular second space S2 with a thickness (vertical length) of 200 mm or more is formed between the first and second cross members 731, 732. In this embodiment, since the thicknesses (vertical lengths) of the first and second cross members 731, 732 are both 210 mm, the thickness of the second space S2 is also 210 mm.

The first and second cross members 731 and 732 are each an inner cross member 72, and in the illustrated example, the first cross member 731 is the base 31, and the second cross member 732 is the joist 32. However, the combination of the first and second cross members 731 and 732 is not limited to this.

In the building 1, a second insulating board 92 made of foamed plastic is fitted into the second space S2. The thickness of the second insulating board 92 is 200 mm or more. By making the thickness of the second insulating board 92 200 mm or more, the building 1 has excellent thermal insulation properties. Furthermore, the thickness of the second insulating board 92 is equal to or less than the thickness of the second space S2, that is, in this embodiment, equal to or less than 210 mm. In this way, by making the thickness of the second insulating board 92 equal to or less than the thickness of the second space S2, the second insulating board 92 does not protrude from the second space S2, and the second insulating board 92 fits well.

In particular, the thickness of the second insulation board 92 in this embodiment is 200 mm, which is 10 mm less than the thickness of the second space S2. The second insulation board 92 is positioned downward so that its underside is flush with the undersides of the first and second cross members 731, 732. The boundary between the second insulation board 92 and the structure is caulked from the upper side of the second insulation board 92, thereby sealing these gaps and increasing airtightness (insulation) and fixing the second insulation board 92 to the structure.

In this way, by placing the second insulation board 92 close to the bottom, a gap G3 of 10 mm is formed between the second insulation board 92 and the floor plate material 15. Gap G3 is connected to gap G2, and in the ventilation insulation WB method, forms an air vent layer located inside (indoor side) of the main insulation material (second insulation board 92). In addition, for example, gap G3 may be used as a space for routing electrical wiring, air conditioner refrigerant pipes, etc.

The above describes the insulation structure in the portion of the building 1 facing the underfloor. However, the insulation structure in this portion is not particularly limited. For example, the second insulation board 92 may be the same thickness as the second space S2, and the gap G3 may be omitted. Also, for example, the second insulation board 92 may be constructed by stacking multiple insulation boards.

Next, the heat insulation structure in the portion of the building 1 facing the roof 6 will be described. In this portion, as shown in FIG. 6, a pair of third and fourth horizontal members 733 and 734 are arranged adjacent to each other. A third space S3 having a thickness (vertical length) of 200 mm or more is formed between the third and fourth horizontal members 733 and 734.

The third and fourth cross members 733 and 734 are each an inner cross member 72, and in the illustrated example, the third cross member 733 is a beam 36 (eaves beam) and the fourth cross member 734 is a purlin 38. However, the combination of the third and fourth cross members 733 and 734 is not limited to this.

In the building 1, a third insulating board 93 made of foamed plastic is fitted into the third space S3. The thickness of the third insulating board 93 is 200 mm or more. By making the thickness of the third insulating board 93 200 mm or more, the building 1 has excellent thermal insulation properties. Furthermore, the thickness of the third insulating board 93 is equal to or less than the thickness of the third space S3. In this way, by making the thickness of the third insulating board 93 equal to or less than the thickness of the third space S3, the third insulating board 93 does not protrude from the third space S3, and the third insulating board 93 fits well.

In particular, the third insulation board 93 in this embodiment has a thickness of 200 mm, and is positioned upward so that its upper surface contacts the rafters 39. The boundary between the third insulation board 93 and the structure is caulked from the underside of the third insulation board 93, thereby sealing these gaps and improving airtightness (insulation) and fixing the third insulation board 93 to the structure.

The above describes the insulation structure of the portion of the building 1 facing the roof 6. However, the insulation structure of this portion is not particularly limited. For example, the third insulation board 93 may be composed of multiple insulation boards.

The above describes the thermal insulation structure of building 1. With the exception of the openings where the windows and doors are located, the entire area of building 1 that faces the outdoors (the area that separates the inside and outside of building 1) has the thermal insulation structure described above. In other words, first, second and third insulation boards 91, 92 and 93, each 200 mm thick, are placed on the entire sides, top and bottom of building 1, except for the openings. This results in building 1 with excellent thermal insulation properties.

The above describes the building 1. As described above, the building 1 includes an inner structure 3 having a pair of adjacent first inner vertical members 711 and second inner vertical members 712 that both extend vertically in the portion facing the exterior wall 5, an outer structure 4 located between the inner structure 3 and the exterior wall 5 and having a first outer vertical member 811 and a second outer vertical member 812 that are arranged side by side on the exterior wall 5 side of the first inner vertical member 711 and extend vertically, an outer space S11 formed between the first outer vertical member 811 and the second outer vertical member 812, and an inner space S12 formed between the first inner vertical member 711 and the second inner vertical member 712, and a first space S1 having a thickness of 200 mm or more. With this type of building 1, a first space S1 of 200 mm or more can be inexpensively formed by combining the inner structure 3 and the outer structure 4. Then, by placing a sufficiently thick insulation board within this first space S1, the building 1 becomes highly insulating.

As described above, the first inner vertical member 711, the second inner vertical member 712, the first outer vertical member 811 and the second outer vertical member 812 each have a thickness of 120 mm or more. With this configuration, a first space S1 having a thickness of 240 mm or more can be formed, and a first insulation board 91 having a thickness of 200 mm can be easily placed in the first space S1. This results in a building 1 with high insulation properties.

As described above, the building 1 has a first insulation board 91 that is disposed in the first space S1 and has a thickness of 200 mm or more and less than the thickness of the first space S1. With this configuration, the first insulation board 91 is sufficiently thick, and the building 1 has high insulation properties.

As described above, the building 1 further has an interior board material 14 arranged on the indoor side of the inner structure 3, the thickness of the first insulation board 91 is smaller than the thickness of the first space S1, and a gap G2 is formed between the interior board material 14 and the first insulation board 91. With this configuration, the gap G2 can form an air vent layer located inside (indoor side) of the main insulation material (first insulation board 91) in the ventilation insulation WB construction method.

As described above, the first insulation board 91 has an outer insulation board 911 that is disposed in the outer space S11 and has the same thickness as the outer space S11, and an inner insulation board 912 that is disposed in the inner space S12 and has a thickness smaller than the thickness of the inner space S12. In this way, by stacking multiple insulation boards to form the first insulation board 91, a thick first insulation board 91 can be prepared at low cost.

As described above, the outer insulation board 911 is longer in the height direction than the inner insulation board 912, the lower end of the outer insulation board 911 is located lower than the lower end of the inner insulation board 912, and the upper end of the outer insulation board 911 is located higher than the upper end of the inner insulation board 912. With this configuration, a larger area can be secured for the outer surface (the surface facing the outer wall 5) of the first insulation board 91, thereby improving the insulation of the building 1.

As described above, the inner structure 3 has a first inner cross member 721 located below the inner space S12, extending horizontally to connect the first inner vertical member 711 and the second inner vertical member 712, and a second inner cross member 722 located above the inner space S12, extending horizontally to connect the first inner vertical member 711 and the second inner vertical member 712. The outer structure 4 has a first outer cross member 821 arranged side by side on the outer wall 5 side of the first inner cross member 721 on the lower side of the outer space S11, extending horizontally to connect the first outer vertical member 811 and the second outer vertical member 812, and a second outer cross member 822 arranged side by side on the outer wall 5 side of the second inner cross member 722 on the upper side of the outer space S11, extending horizontally to connect the first outer vertical member 811 and the second outer vertical member 812. The upper surface of the first outer cross member 821 is located below the upper surface of the first inner cross member 721, and the lower surface of the second outer cross member 822 is located above the lower surface of the second inner cross member 722. With this simple configuration, the lower end of the outer insulation board 911 can be located below the lower end of the inner insulation board 912, and the upper end of the outer insulation board 911 can be located above the upper end of the inner insulation board 912.

As described above, the building 1 includes a pair of adjacent first and second horizontal members 731 and 732 that extend horizontally in the portion facing the underfloor, a second space S2 that is formed between the first and second horizontal members 731 and 732 and has a thickness of 200 mm or more, and a second insulation board 92 that is disposed within the second space S2 and has a thickness of 200 mm or more. This configuration results in a sufficiently thick second insulation board 92, resulting in a building 1 with high insulation properties.

As described above, the building 1 further has a floor plate material 15 arranged above the first cross member 731 and the second cross member 732. The thickness of the second insulation board 92 is smaller than the thickness of the second space S2, and a gap G3 is formed between the floor plate material 15 and the second insulation board 92. With this configuration, the gap G3 can form an air vent layer located inside (indoor side) of the main insulation material (second insulation board 92) in the ventilation insulation WB construction method.

As described above, the building 1 has a pair of adjacent third and fourth cross members 733 and 734 that both extend horizontally in the portion facing the roof 6, a third space S3 that is formed between the third and fourth cross members 733 and 734 and has a thickness of 200 mm or more, and a third insulation board 93 that is disposed within the third space S3 and has a thickness of 200 mm or more. With this configuration, the third insulation board 93 is sufficiently thick, resulting in a building 1 with high insulation properties.

Second Embodiment
FIG. 7 is a vertical cross-sectional view showing a foundation portion of a building according to the second embodiment.

The building 1 of this embodiment is similar to the first embodiment described above, except that the structure of the foundation 2 is different. In the following explanation, the differences between this embodiment and the previously described embodiment will be mainly described, and explanations of similar points will be omitted. In addition, in the drawings of this embodiment, the same reference numerals are used for the same structures as the previously described embodiment.

In the first embodiment described above, both sills 31 and 41 were placed on the rising part of the foundation 2, but in this embodiment, as shown in FIG. 7, the inner sill 31 is supported by the beams 33 rather than the foundation 2. With this configuration, the volume of the rising part of the foundation 2 is smaller than in the first embodiment described above, so the cost of the building 1 can be kept low.

This second embodiment can achieve the same effects as the first embodiment described above.

The building of the present invention has been described above based on the illustrated embodiment, but the present invention is not limited to this, and the configuration of each part can be replaced with any configuration having a similar function. In addition, any other components may be added. Furthermore, each embodiment may be combined as appropriate.

Reference Signs List 1...building, 11...bearing surface material, 12...vertical furring strip, 14...interior board material, 15...floor board material, 2...foundation, 3...inner structure, 31...base, 32...joist, 33...beam, 34...column, 341...through column, 342...tubular column, 343...stud, 36...beam, 37...ridgepole, 38...main building, 39...rafter, 4...outer structure, 41...base, 44...column, 441...through column, 442...tubular column, 443...stud, 46...beam, 5...exterior wall, 6...roof, 71...inner vertical member, 711...first inner vertical member, 712...second inner vertical member, 72...inner horizontal member, 721...first inner horizontal member, 722... Second inner horizontal member, 731...first horizontal member, 732...second horizontal member, 733...third horizontal member, 734...fourth horizontal member, 81...outer vertical member, 811...first outer vertical member, 812...second outer vertical member, 82...outer horizontal member, 821...first outer horizontal member, 822...second outer horizontal member, 91...first insulation board, 911...outer insulation board, 912...inner insulation board, 92...second insulation board, 93...third insulation board, G1...gap, G2...gap, G3...gap, S1...first space, S11...outer space, S12...inner space, S2...second space, S3...third space

Claims (5)

In the part facing the exterior wall,
an inner structure including a pair of adjacent first and second inner vertical members, both extending vertically; a first inner cross member extending horizontally to connect the first and second inner vertical members; and a second inner cross member located above the first inner cross member, extending horizontally to connect the first and second inner vertical members;
an outer structure comprising: a first outer vertical member located between the inner structure and the outer wall, the first outer vertical member arranged side by side on the outer wall side of the first inner vertical member and extending in the vertical direction ; a second outer vertical member arranged side by side on the outer wall side of the second inner vertical member and extending in the vertical direction; a first outer cross member arranged side by side on the outer wall side of the first inner cross member and extending in the horizontal direction to connect the first outer vertical member and the second outer vertical member; and a second outer cross member located above the first outer cross member, arranged side by side on the outer wall side of the second inner cross member and extending in the horizontal direction to connect the first outer vertical member and the second outer vertical member, wherein an upper surface of the first outer cross member is located below an upper surface of the first inner cross member and a lower surface of the second outer cross member is located above a lower surface of the second inner cross member ;
A bearing surface material fixed to the outer peripheral surface of the outer body;
An interior board material arranged on the indoor side of the inner skeleton;
An outer space formed between the first outer vertical member and the second outer vertical member, and an inner space formed between the first inner vertical member and the second inner vertical member, the first space having a thickness of 200 mm or more;
A first insulation board is disposed in the first space and has a thickness of 200 mm or more and less than the thickness of the first space,
No brace is disposed within the first space,
The first insulation board is disposed in the outer space and has an outer insulation board having the same thickness as the outer space, and an inner insulation board is disposed in the inner space and has a thickness smaller than the thickness of the inner space,
The outer insulation board is longer in the height direction than the inner insulation board, the lower end is located below the lower end of the inner insulation board, the upper end is located above the upper end of the inner insulation board, and further, the lower end is sandwiched between the load-bearing surface material and the first inner cross member, and the upper end is sandwiched between the load-bearing surface material and the second inner cross member,
The inner insulation board is disposed close to the outer insulation board, and a gap is formed between the inner insulation board and the interior board material,
A building characterized in that, with the outer surface of the inner insulation board in contact with the inner surface of the outer insulation board, the boundary between the inner insulation board and the inner structure is caulked from the inner surface side of the inner insulation board, thereby sealing the gap between the inner insulation board and the inner structure and fixing the inner insulation board to the inner structure . The building according to claim 1, wherein the first inner vertical member, the second inner vertical member, the first outer vertical member, and the second outer vertical member each have a thickness of 120 mm or more. In the part facing the underfloor,
A pair of first and second horizontal members that extend horizontally and are adjacent to each other,
A second space formed between the first cross member and the second cross member and having a thickness of 200 mm or more;
The building according to claim 1 , further comprising: a second insulation board disposed in the second space and having a thickness of 200 mm or more. The floor plate material is further provided on the upper side of the first cross member and the second cross member,
The thickness of the second insulation board is smaller than the thickness of the second space,
The building according to claim 3 , wherein a gap is formed between the floorboard material and the second insulation board. In the area facing the roof,
A pair of third and fourth horizontal members that extend horizontally and are adjacent to each other,
A third space formed between the third cross member and the fourth cross member and having a thickness of 200 mm or more;
The building according to claim 1 , further comprising: a third insulation board disposed within the third space and having a thickness of 200 mm or more.

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