JP2025137665A - Building construction method - Google Patents

Abstract

[Problem] To provide a building construction method that can reduce the weight of the entire building and easily strengthen the thermal insulation and structural strength at low cost.
[Solution]
the first and second wall panels 10C, 20C of the lower floor within a wall body that forms a wall line in a straight line in plan view, and are arranged side by side with one side panel facing each other along the thickness direction of the wall body without being spaced apart; and fastening the upper parts of anchor bolts 51 to the lower ends of the first and second wall panels 10C, 20C of the lower floor.
[Selected figure] Figure 20

Description

The present invention relates to a building construction method.

In recent years, the construction of houses and other buildings has become increasingly industrialized. For example, panel construction methods have been adopted in some cases, in which components such as walls, floors, and roofs are prefabricated into panels and then assembled at the construction site to build a house.
Such wall panels are made by assembling vertical and horizontal frame members into a rectangular frame body, with plywood attached to both sides. Wall panels have also been disclosed in which the space between the frame body and the plywood is filled with insulating material to enhance thermal insulation (see, for example, Patent Document 1).

Patent No. 5393017

In buildings using wall panels filled with such insulating material, known methods for further improving the thermal insulation include increasing the thickness of the wall panels, increasing the cross section of the wall panels, and increasing the amount of insulating material filled in, or providing external insulation.
However, increasing the thickness of the wall panels poses manufacturing problems, such as the need to install new wall panels of different thicknesses, which increases costs, increases the weight of the building as a whole, and requires the allocation of new production facilities.

The present invention was made in consideration of the above circumstances, and its objective is to provide a building construction method that can reduce the overall weight of the building and easily improve its insulation and structural strength at low cost.

The invention described in claim 1 is, for example, as shown in FIGS. 20 and 21, a construction method for a building 300,
a process of attaching a surface material to one or both sides of a frame formed by assembling vertical and horizontal frame members into a rectangular shape to form a hollow structure, and filling the hollow space with heat insulating material 13C, 23C, 23D, 33C, 43C, 43D to manufacture a first building structural material (first wall panel 10C, 30C) and a second building structural material (second wall panel 20C, 20D, 40C, 40D), which are architectural wood panels;
A process of placing the side end of a floor panel 60 of a lower floor on the foundation 50, and placing a half base 53 on the foundation 50 outside the side end of the floor panel 60 of the lower floor;
a step of placing the first building structural member of the lower floor (the first wall panel 10C of the lower floor) on the side end of the floor panel 60 of the lower floor, and placing the second building structural member of the lower floor (the second wall panels 20C, 20D of the lower floor) on the half foundation 53;
a step of arranging the first building structural material of the lower floor (first wall panel 10C of the lower floor) and the second building structural material of the lower floor (second wall panels 20C, 20D of the lower floor) within a wall body that forms a wall line in a straight line in a plan view, and arranging them side by side in a back-to-back state with the face panels on one side in contact with each other along the thickness direction of the wall body without being spaced apart from each other;
and fastening the upper part of the inner anchor bolt 51 of the anchor bolts 51 embedded in the foundation 50 to the lower end part of the first building structural material of the lower floor (first wall panel 10C of the lower floor) and fastening the upper part of the outer anchor bolt 51 to the lower end part of the second building structural material of the lower floor (second wall panels 20C, 20D of the lower floor).

The invention described in claim 2 is, for example, as shown in Figures 20 and 21, in the building construction method described in claim 1,
A step of placing a floor panel 70 of the upper floor on the first building structural member of the lower floor (the first wall panel 10C of the lower floor);
a step of placing a girth 54 on the second building structural member of the lower floor (second wall panel 20C, 20D of the lower floor);
a step of placing the first building structural member (first wall panel 30C of the upper floor) on the side end of the floor panel 70 of the upper floor;
a step of placing the second building structural material (second wall panels 40C, 40D) of the upper floor on the girth 54;
a step of connecting an upper end of the first building structural member of the lower floor (the first wall panel 10C of the lower floor) and a lower end of the first building structural member of the upper floor (the first wall panel 30C of the upper floor) with connecting bolts 55;
and a step of connecting the upper end of the second building structural material of the lower floor (second wall panels 20C, 20D of the lower floor) to the lower end of the second building structural material of the upper floor (second wall panels 40C, 40D of the upper floor) with connecting bolts 55.

The present invention provides a building construction method that can easily and inexpensively strengthen insulation and structural strength while reducing the overall weight of the building.

1 is a schematic perspective view of a heat insulating structure for a building according to a first embodiment of the present invention; FIG. 2 is a side cross-sectional view of the thermal insulation structure of the building of FIG. 1. FIG. 2A is a front view of the first and second wall panels, FIG. 2B is a cross-sectional side view of the first and second wall panels, and FIG. 2C is a cross-sectional plan view of the first and second wall panels. 4A is a modification of FIG. 3, in which (a) is a front view of the first and second wall panels, (b) is a side cross-sectional view of the first and second wall panels, and (c) is a plan cross-sectional view of the first and second wall panels. FIG. 10 is a schematic perspective view of a heat insulating structure for a building according to a second embodiment of the present invention. FIG. 6 is a side cross-sectional view of the thermal insulation structure of the building of FIG. 5. FIG. 10 is a side cross-sectional view of a thermal insulation structure for a building according to a third embodiment of the present invention. 1 is an explanatory diagram of a location where the thermal insulation structure of a building of the present invention is applied. 1 is a schematic perspective view showing a construction method for a building to which the thermal insulation structure of the present invention is applied. 1 is a schematic perspective view showing a construction method for a building to which the thermal insulation structure of the present invention is applied. 1 is a schematic perspective view showing a construction method for a building to which the thermal insulation structure of the present invention is applied. 1 is a schematic perspective view showing a construction method for a building to which the thermal insulation structure of the present invention is applied. FIG. 13 is a schematic perspective view showing a modification shown in FIGS. 9 to 12, illustrating a construction method for a building. FIG. 13 is a schematic perspective view showing a modification shown in FIGS. 9 to 12, illustrating a construction method for a building. FIG. 13 is a schematic perspective view showing a modification shown in FIGS. 9 to 12, illustrating a construction method for a building. FIG. 13 is a schematic perspective view showing a modification shown in FIGS. 9 to 12, illustrating a construction method for a building. FIG. 13 is a schematic perspective view showing a modification shown in FIGS. 9 to 12, illustrating a construction method for a building. This is a diagram showing the construction method for a five-story building. This is a diagram showing the construction method for a five-story building. 1 is a side cross-sectional view showing a reference example of a heat insulating structure applicable to a building according to the present invention. 1 is a side cross-sectional view showing a reference example of a heat insulating structure applicable to a building according to the present invention. FIG. 2 is a cross-sectional plan view of the thermal insulation structure of the building of FIG. 1.

Embodiments of the present invention will be described below with reference to the drawings. However, while the embodiments described below are subject to various limitations that are technically preferable for implementing the present invention, the technical scope of the present invention is not limited to the following embodiments and illustrated examples. Note that the directions in the following embodiments and illustrated examples have been set solely for the convenience of explanation.

[Building insulation structure]
First Embodiment
FIG. 1 is a schematic perspective view of a thermal insulation structure for a building according to a first embodiment of the present invention, and FIG. 2 is a side cross-sectional view of the thermal insulation structure for a building.
1 and 2, a building 300 has a first building structural member 10 for the lower floor erected on a foundation 50, and a second building structural member 20 for the lower floor erected outside the first building structural member 10. The first building structural member 10 and the second building structural member 20 are arranged within a wall that forms a straight wall line in a plan view, and are spaced apart from each other and arranged side by side along the thickness direction of the wall. An insulating layer is formed between the first building structural member 10 and the second building structural member 20 that are spaced apart from each other and arranged side by side.
Furthermore, on the foundation 50, a first building structural member 30 for the upper floor is erected on a first building structural member 10 for the lower floor, and a second building structural member 40 for the upper floor is erected on a second building structural member 20 for the lower floor. These first building structural members 30 and second building structural members 40 are also arranged within a single wall that forms a straight wall line in a plan view, and are arranged side by side at a distance from each other along the thickness direction of the wall. An insulating layer is also formed between the first building structural member 20 and the second building structural member 40.

The first and second building structural materials 10, 20, 30, 40 may be, for example, architectural wood panels such as pillars used in wooden frame construction, 2x4 panels used in 2x4 construction, or wall panels used in panel construction, and it is preferable to use architectural wood panels, particularly because they are easier to install on site.
In the following, a case where the first building structural materials 10, 30 are applied to the first wall panels 10, 30, and the second building structural materials 20, 40 are applied to the second wall panels 20, 40 will be described.

3 and 4 are diagrams showing the first and second wall panels, where Figs. 3(a) and 4(a) are front views of the first and second wall panels, Figs. 3(b) and 4(b) are side cross-sectional views of the first and second wall panels, and Figs. 3(c) and 4(c) are plan cross-sectional views of the first and second wall panels.
The first and second wall panels 10, 20 of the lower floor are made of vertical and horizontal frame members assembled into a rectangular shape, with auxiliary beam members assembled vertically and horizontally inside the rectangular frame to form a frame body 11, 21. A face material 12, 22 is attached to one or both sides of this frame body 11, 21, creating a hollow structure. Furthermore, it is preferable that the hollow interior portion be filled with a heat insulating material 13, 23.
3 and 4 show the first and second wall panels 10, 20 of the lower floor, but the first and second wall panels 30, 40 of the upper floor have the same configuration. Also, the first and second wall panels 10, 20, 30, 40 shown in Figures 1 to 4 have facing materials 12, 22, 32, 42 attached to both sides.

Examples of the insulating materials 13, 23 include fiber-based insulating materials 13a, 23a (see Figure 3) such as glass wool or rock wool, and foamed resin-based insulating materials 13b, 23b (see Figure 4) such as phenolic foam or polyethylene foam. In particular, fiber-based insulating materials are suitable for use in the first wall panel 10, which is placed inside the building 300 and requires wiring work, while foamed resin-based insulating materials, due to their high insulating performance, are suitable for use in the second wall panel 20, which is placed outside the building 300.

The foundation 50 is made of reinforced concrete, and anchor bolts 51 (not shown in FIG. 1 ) are embedded at intervals along the length of the foundation 50. The anchor bolts 51 protrude upward from the top surface of the foundation 50.
In addition, a ventilation base 52 for taking in outside air under the floor is interposed between the foundation 50 and the first and second wall panels 10, 20 of the lower floor.

The side end of the floor panel 60 for the lower floor is placed on the ventilation base 52. Similar to the first and second wall panels 10 and 20 described above, the floor panel 60 is made by assembling vertical and horizontal frame members into a rectangular shape, and auxiliary beam members are assembled vertically and horizontally inside the rectangular frame to form a frame body 61. A face material 62 is attached to one or both sides of this frame body 61, resulting in a hollow interior. Furthermore, the hollow interior portion is preferably filled with the aforementioned insulating material 63. The floor panel 60 for the lower floor shown in Figures 1 and 2 (and the floor panel 70 for the upper floor, described below) has the face material 62 (72) attached only to the top surface.

A half base 53 is placed on the ventilation base 52, outside the side end of the floor panel 60 of the lower floor. Furthermore, a lower connecting member 80 is placed on the ventilation base 52 between the side end of the floor panel 60 of the lower floor and the half base 53.

The lower connection member 80 has a portal-like shape in side cross section. The lower connection member 80 is composed of a first connection portion 81 located at the lower end of the first wall panel 10 of the lower floor and outside the side end of the floor panel 60 of the lower floor, a second connection portion 82 located at the lower end of the second wall panel 20 of the lower floor and inside the half foundation 53, and a third connection portion 83, which is a plate material connecting the upper ends of the first and second connection portions 81, 82. The first connection portion 81 and the second connection portion 82 are spaced apart along the thickness direction of the wall body, and this space is filled with insulating material 84. The first to third connection portions 81 to 83 are elongated plate-like members that extend along the foundation 50 and are integrally formed.
As such, the lower connecting member 80 is made up of the first to third connecting parts 81 to 83 and has a gate-like shape when viewed from the side, making it lighter and more insulating than, for example, a connecting member that is rectangular when viewed from the side (such as a solid beam).

In the above description, the lower connection member 80 is formed by integrally forming the first to third connection portions 81 to 83 in the shape of a long plate along the foundation 50. However, it is also possible to form the first to third connection portions in the shape of a short plate instead of a long one, and to disperse multiple such lower connection members 80 along the foundation 50.

The lower connection member 80 is placed on the ventilation base 52, between the side edge of the lower floor floor panel 60 and the half base 53. The upper surface of the lower floor floor panel 60, the upper surface of the third connection part 83 of the lower connection member 80, and the upper surface of the half base 53 are all approximately flush with each other. The lower connection member 80 is preferably adhered to the side edge of the lower floor floor panel 60 and the half base 53 with an adhesive, and screws may also be used in combination.

Then, the first wall panel 10 of the lower floor is placed on top of the side end of the lower connecting member 80 and the floor panel 60 using adhesive (screws can also be used; the same applies below), and the second wall panel 20 of the lower floor is placed on top of the lower connecting member 80 and the half base 53 using adhesive.
The lower horizontal frames constituting the first and second wall panels 10, 20 of the lower floor each have a through hole (not shown) for inserting an anchor bolt 51 therethrough.
Of the anchor bolts 51 embedded in the foundation 50, the upper part of the inner anchor bolt 51 is inserted through the ventilation base ring 52 and further inserted between the lower connection member 80 and the side end face of the floor panel 60, and a clamping nut N is screwed onto the lower end of the first wall panel 10 via a washer (not shown). Similarly, of the anchor bolts 51 embedded in the foundation 50, the upper part of the outer anchor bolt 51 is inserted through the ventilation base ring 52 and further inserted between the lower connection member 80 and the half base 53, and a clamping nut N is screwed onto the lower end of the second wall panel 20 via a washer (not shown).
In this way, the first and second wall panels 10, 20 of the lower floor, which are erected spaced apart on the foundation 50, are connected via the lower connecting member 80.

In addition, it is preferable that an insulating layer is provided between the first wall panel 10 and the second wall panel 20 on the lower floor, and that insulating material 100 (omitted in Figure 1) is provided, as this further improves the insulating properties.
Examples of the insulating material 100 include fiber-based insulating materials such as glass wool and rock wool, and foamed resin-based insulating materials such as phenol foam and polyethylene foam, similar to the insulating materials 13 and 23 filled in the first and second wall panels 10 and 20 described above.
By appropriately adjusting the gap between the first wall panel 10 and the second wall panel 20, the amount of heat insulating material 100, 200 filled can be easily adjusted.

On the other hand, an upper building structural member 70 is placed on top of the first wall panel 10 of the lower floor.
Examples of the upper building structural materials 70 include beams used in wooden framework construction, and architectural wood panels such as floor panels and roof panels used in panel construction. The following describes the case where the upper building structural materials 70 are floor panels 70 on the upper floor.

A girth 54 is placed on top of the second wall panel 20 of the lower floor. Additionally, an upper connecting member 90 is placed on top of the first wall panel 10 and second wall panel 20 of the lower floor, between the side edge of the floor panel 70 of the upper floor and the girth 54.

The upper connection member 90, like the lower connection member 80 described above, has a portal-like shape in side cross section. The upper connection member 90 is composed of a first connection portion 91 located at the upper end of the first wall panel 10 of the lower floor and outside the side end of the floor panel 70 of the upper floor, a second connection portion 92 located at the upper end of the second wall panel 20 of the lower floor and inside the girth 54, and a third connection portion 93 connecting the upper ends of the first and second connection portions 91, 29. The first to third connection portions 91 to 93 are elongated plates that extend along the foundation 50, and are formed integrally.

The upper connecting member 90 may also be formed integrally with the first to third short plate-shaped connecting portions 91 to 93, with multiple such upper connecting members 90 scattered along the foundation 50 (see Figure 22). This allows the insulation materials 100, 200 to be continuous across the upper and lower floors, further strengthening insulation.

The upper connection member 90 is placed on the first and second wall panels 10, 20 of the lower floor, between the side edge of the floor panel 70 of the upper floor and the girth 54. The upper surface of the floor panel 70 of the upper floor, the upper surface of the third connection portion 93 of the upper connection member 90, and the upper surface of the girth 54 are approximately flush with each other. It is preferable that the upper connection member 90 be adhered to the first wall panel 10 and second wall panel 20 of the lower floor, the side edge of the floor panel 70 of the upper floor, and the girth 54 with an adhesive.

Furthermore, the first wall panel 30 of the upper floor (not shown in FIG. 1) is placed on the upper connecting member 90 and the side end of the floor panel 70 of the upper floor, and the second wall panel 40 of the upper floor (not shown in FIG. 1) is placed on the upper connecting member 90 and the girth 54.
The lower horizontal members constituting the first and second wall panels 30, 40 of the upper floor are provided with girth bolts 55 (omitted in FIG. 1) that connect the wall panels 10, 20 of the lower floor to the wall panels 30, 40 of the upper floor.
Each of the connectors has a through hole (not shown) for inserting the connector.

The connecting bolt 55, which is threaded with a clamping nut N via a washer (not shown) onto the upper end of the first wall panel 10 of the lower floor, has its upper portion inserted between the upper connection member 90 and the side end face of the floor panel 70 of the upper floor, and a clamping nut N is threaded with a washer (not shown) onto the lower end of the first wall panel 30 of the upper floor. Similarly, the girth bolt 55, which is threaded with a clamping nut N via a washer (not shown) onto the upper end of the second wall panel 40 of the lower floor, has its upper portion inserted between the upper connection member 90 and the girth 54, and a clamping nut N is threaded with a washer (not shown) onto the lower end of the second wall panel 40 of the upper floor.
In this way, the first and second wall panels 10, 20 of the lower floor, which are erected at a distance from each other on the foundation 50, and the first and second wall panels 30, 40 of the upper floor, which are erected at a distance from each other on the first and second wall panels 10, 20 of the lower floor, are connected by the lower connecting member 80 and the upper connecting member 90.

In addition, the upper ends of the wall panels 30, 40 on the upper floor are connected to the first and second wall panels 30, 40 on the upper floor and to upper building structural materials (for example, floor panels or roof panels on the floor above) placed on the upper ends of the wall panels 30, 40 on the upper floor via upper connecting members (not shown), just like the upper ends of the wall panels 10, 20 on the lower floor.
It is also preferable that the insulating material 200 be filled between the first and second wall panels 30, 40 of the upper floor. Furthermore, although not shown, insulating material may also be filled between the first and second connection portions 91, 92 of the upper connection member 90.

According to the above embodiment, the first wall panels (the first wall panel 10 of the lower floor and the first wall panel 30 of the upper floor) erected on the foundation 50 and the second wall panels (the second wall panel 20 of the lower floor and the second wall panel 40 of the upper floor) arranged on the outside of the first wall panels 10, 30 are arranged side by side at a distance from each other along the thickness direction, so that a heat insulating layer can be formed between the first wall panels 10, 30 and the second wall panels 20, 40, resulting in excellent heat insulating properties.
Therefore, for example, when providing a thermal insulation layer inside one wall panel, it was necessary to increase the thickness of the wall panel in order to increase the thickness of the thermal insulation layer, but with the present invention, the thickness of the thermal insulation layer can be easily changed by using two existing wall panels and appropriately adjusting the spacing between the first and second wall panels 10, 20, 30, 40. This allows for weight reduction at low cost and improved thermal insulation.

Furthermore, lower connecting members 80 are provided at the ends of the first wall panel 10 of the lower floor and the second wall panel 20 of the lower floor, and between the first wall panel 10 of the lower floor and the second wall panel 20 of the lower floor, and the first and second wall panels 10, 20 of the lower floor are connected by the lower connecting members 80, so that the first and second wall panels 10, 20 can be firmly erected while being spaced apart, and an insulating layer can be reliably secured.
Similarly, in the case of the first wall panel 30 and the second wall panel 40 on the upper floor, the first and second wall panels 30, 40 on the upper floor are connected by the upper connecting member 90, so that the first and second wall panels 30, 40 can be firmly erected while being spaced apart, and an insulating layer can be reliably secured.

Furthermore, the connecting members (lower connecting member 80, upper connecting member 90) include first connecting portions 81, 91 located at the ends of the first wall panels (lower floor first wall panel 10, upper floor first wall panel 20), second connecting portions 82, 92 located at the ends of the second wall panels (lower floor second wall panel 20, upper floor second wall panel 40), and third connecting portions 83, 93 connecting the first and second connecting portions 81, 82. Therefore, by manufacturing the connecting members (lower connecting member 80, upper connecting member 90) in advance at a factory or the like, they can be easily installed on-site at the ends of the first and second wall panels 10, 20, 30, 40, allowing for easy construction.

Second Embodiment
FIG. 5 is a schematic perspective view of a thermal insulation structure for a building according to a second embodiment of the present invention, and FIG. 6 is a side cross-sectional view of the thermal insulation structure for a building.
The thermal insulation structure for a building of the second embodiment differs from the first embodiment in the shapes of the lower connecting member 80 and the upper connecting member 90. The other components, such as the foundation 50, the first and second wall panels 10, 20 of the lower floor, the first and second wall panels 30, 40 of the upper floor, the floor panels 60, 70 of the lower and upper floors, the ventilation base 52, the half base 53, and the girth 54, are the same as those of the first embodiment, and therefore similar components are designated by the same reference numerals and their description will be omitted.

As shown in Figures 5 and 6, the side end of the floor panel 60 of the lower floor is placed on the ventilation base 52 on the foundation 50, and a half base 53 is placed on the outside of the side end of the floor panel 60 of the lower floor.
In addition, a lower connecting member 80A is placed on the ventilation base 52 between the side end of the lower floor floor panel 60 and the half base 53.

The lower connecting member 80A includes a fourth connecting portion 81A that is positioned at the lower end of the first wall panel 10 of the lower floor and outside the side end of the floor panel 60, a fifth connecting portion 82A that is positioned at the lower end of the second wall panel 20 of the lower floor and inside the half base 53, and a driving member 83A that is driven from the fifth connecting portion 82A toward the fourth connecting portion 81A.
Specifically, the fourth and fifth connection portions 81A, 82A are formed in the shape of long plates that extend along the foundation 50. The driving member 83A is preferably cylindrical or columnar, and has a length that penetrates from the half base 53 to the fifth connection portion 82A, the fourth connection portion 81A, and the side end portion of the floor panel 60. The driving member 83A is preferably made of, for example, metal or wood, and specifically is preferably a dowel or the like.
Such a lower connection member 80A is preferably adhered to the side end of the floor panel 60 of the lower floor and the half base 53 with an adhesive.

The first wall panel 10 of the lower floor is placed on top of the fourth connection portion 81A and the side end of the floor panel 60 of the lower floor using adhesive, and the second wall panel 20 of the lower floor is placed on top of the fifth connection portion 82A and the half base 53 using adhesive.

Of the anchor bolts 51 (omitted from FIG. 5 ) embedded in the foundation 50, the upper part of the inner anchor bolt 51 is inserted through the ventilation base ring 52 and further inserted between the fourth connection part 81A and the side end face of the floor panel 60 of the lower floor, and a tightening nut N is screwed onto the lower end of the first wall panel 10 of the lower floor via a washer (not shown). Similarly, of the anchor bolts 51 embedded in the foundation 50, the upper part of the outer anchor bolt 51 is inserted through the ventilation base ring 52 and further inserted between the fifth connection part 82A and the half base 53, and a tightening nut N is screwed onto the lower end of the second wall panel 20 of the lower floor via a washer (not shown).
In addition, multiple driving members 83A are driven at intervals (e.g., equal intervals) from the outer surface of the half base 53 toward the floor panel 60 of the lower floor, penetrating from the fifth connection portion 82A to the fourth connection portion 81A, thereby connecting the half base 53, the fourth and fifth connection portions 81A, 82A to the floor panel 60 of the lower floor.
In this way, the first and second wall panels 10, 20 erected at a distance from each other on the foundation 50 are connected via the lower connecting member 80.

It is also preferable that the space between the first wall panel 10 and the second wall panel 20 of the lower floor be filled with the above-mentioned heat insulating material 100 (omitted in FIG. 5).
The amount of heat insulating material 100 filled can be easily adjusted by appropriately adjusting the distance between the first wall panel 10 on the lower floor and the second wall panel 20 on the lower floor.

Meanwhile, the floor panel 70 of the upper floor is placed on the first wall panel 10 of the lower floor, and the girth 54 is placed on the second wall panel 20 of the lower floor. In addition, an upper connecting member 90A is placed on the first and second wall panels 10, 20 of the lower floor between the side end of the floor panel 70 of the upper floor and the girth 54.
The upper connection member 90A has the same shape as the lower connection member 80A described above, and is composed of a fourth connection portion 91A, a fifth connection portion 92A, and a driving member 93A.
Such upper connecting member 90A is preferably adhered to the first wall panel 10, the second wall panel 20 of the lower floor, the side edges of the floor panel 70 of the upper floor, and the girth 54 with an adhesive.

Furthermore, the first wall panel 30 of the upper floor (not shown in Figure 5) is placed on top of the fourth connection portion 91A and the side end of the floor panel 70 of the upper floor, and the second wall panel 40 of the upper floor (not shown in Figure 5) is placed on top of the fifth connection portion 92A and the girth 54.

The upper end of the girth bolt 55 (not shown in FIG. 5 ) is threaded with a clamping nut N via a washer (not shown) to the upper end of the first wall panel 10 of the lower floor, and the upper end of the first wall panel 30 of the upper floor is threaded with a clamping nut N via a washer (not shown). Similarly, the upper end of the girth bolt 55 is threaded with a clamping nut N via a washer (not shown) to the upper end of the second wall panel 20 of the lower floor, and the upper end of the girth bolt 55 is threaded with a clamping nut N via a washer (not shown) to the lower end of the second wall panel 40 of the upper floor, and the upper end of the second wall panel 20 of the lower floor is threaded with a clamping nut N via a washer (not shown).
In addition, multiple driving members 93A are driven at predetermined intervals from the outer surface of the girth 54 in an approximately horizontal direction toward the floor panel 70 of the upper floor, penetrating from the fifth connection portion 92A to the fourth connection portion 91A, thereby connecting the girth 54, the fourth and fifth connection portions 91A, 92A to the floor panel 70 of the upper floor.
In this way, the first and second wall panels 10, 20 of the lower floor, which are erected at a distance from each other on the foundation 50, and the first and second wall panels 30, 40 of the upper floor, which are erected at a distance from each other on the first and second wall panels 10, 20 of the lower floor, are connected by the lower connecting member 80A and the upper connecting member 90A.

According to the above embodiment, as with the first embodiment, an insulating layer can be formed between each of the first wall panels 10, 30 and the second wall panels 20, 40, resulting in excellent thermal insulation. Therefore, by using two existing wall panels and appropriately adjusting the spacing between the first and second wall panels 10, 20, 30, 40, the thickness of the insulating layer can be easily changed. This allows for weight reduction at low cost and improved thermal insulation.

In addition, because the first and second wall panels 10, 20, 30, and 40 are connected by the lower connecting member 80A and the upper connecting member 90A, the first and second wall panels 10, 20, 30, and 40 can be firmly erected while spaced apart, ensuring a reliable thermal insulation layer.

Furthermore, the connecting members (lower connecting member 80A, upper connecting member 90A) are equipped with fourth connecting portions 81A, 91A located at the ends of the first wall panels 10, 30, fifth connecting portions 82A, 92A located at the ends of the second wall panels 20, 40, and driving members 83A, 93A that are driven from the fifth connecting portions 82A, 92A toward the fourth connecting portions 81A, 91A, allowing for easy on-site installation according to the spacing between the first and second wall panels 10, 20, 30, 40.

Note that the lower connection member 80A and upper connection member 90A are described as consisting of fourth and fifth connection portions 81A, 82A, 91A, 92A, which are elongated plates extending along the foundation 50, and multiple driving members 83A, 93A. However, the fourth and fifth connection portions 81A, 82A, 91A, 92A are not limited to being elongated plates, and may be short plates, and multiple such lower connection members 80A and upper connection members 90A may each be provided scattered along the foundation 50.

Third Embodiment
FIG. 7 is a side cross-sectional view of a heat insulating structure for a building according to a third embodiment of the present invention.
The thermal insulation structure for a building of the third embodiment uses lower connection members 80B and upper connection members 90B that have shapes different from the lower connection members 80 and upper connection members 90 used in the first embodiment. The other components, such as the foundation 50, the first and second wall panels 10, 20 of the lower floor, the first and second wall panels 30, 40 of the upper floor, the floor panels 60, 70 of the lower and upper floors, the ventilation base 52, the half base 53, and the girth 54, are the same as those in the first embodiment, and therefore similar components are designated by the same reference numerals and their description will be omitted.

Specifically, in the first embodiment, the lower connecting member 80 had a portal-like shape in side cross section, with the upper ends of the first connecting portion 81 and the second connecting portion 82 connected to each other by the third connecting portion 83. However, in the third embodiment, as shown in FIG. 7, the third connecting portion 83B has a size and shape that fits between the first and second connecting portions 81B, 82B (i.e., between the first and second wall panels 10, 20), like a solid beam, and these first to third connecting portions 81B to 83B are bonded together. Note that the upper connecting member 90B is also formed by bonding the first to third connecting portions 91B to 93B together, just like the lower connecting member 80B.

Therefore, for example, at a construction site, the first to third connection portions 81B to 83B and 91B to 93B of the lower connection member 80B and the upper connection member 90B can be placed and adhered together to easily connect the first and second wall panels 10, 20, 30, and 40 that are erected at a distance from each other.

Note that the lower connection member 80B and upper connection member 90B are described as consisting of first to third connection portions 81B-83B, 91B-93B, which are elongated plates extending along the foundation 50. However, the first to third connection portions 81B-83B, 91B-93B are not limited to being elongated plates and may instead be short plates. Multiple such lower connection members 80B and upper connection members 90B may each be provided scattered along the foundation 50.

Furthermore, in the above first to third embodiments, the lower connecting members 80, 80A, 80B are provided at the lower ends of the first and second wall panels 10, 20 on the lower floor, and the upper connecting members 90, 90A, 90B are provided at the upper ends of the first and second wall panels 10, 20 on the lower floor and at the lower ends of the first and second wall panels 30, 40 on the upper floor. However, this is not limited to this, and the upper connecting members may be provided at the side ends of the first and second wall panels 10, 20, 30, 40, for example, to connect the side ends of the first and second wall panels 10, 20, 30, 40 together.

<Example>
Next, we will explain the locations where the insulating structure of the present invention, which is a structure in which first and second building structural materials are arranged side by side at a distance from each other (hereinafter also referred to as a "double structure"), as described in the first to third embodiments, is applied.
Of the multiple walls that make up a building, the wall to which the double structure is applied is determined by whether the area on either side of the target wall is an outdoor area with outdoor air attributes or an indoor area with indoor air attributes.

Examples of the areas with outdoor air attributes include a front porch, a garage, a balcony, an external storage area, an external warehouse, and the like.
The areas with the shy attribute include an entrance hall, a corridor, a living room, a kitchen, a storage room, a private room, a stairwell, a utility room, a bedroom, a toilet, a dressing room, and a bathroom.

For example, as shown in Figure 12, for a specific wall P1 among the multiple walls P that make up the building 300, when one area on either side of the specific wall P1 is the area with the outdoor air attribute (outdoor air area Ra) and the other area is the area with the indoor air attribute (indoor air area Rb), the specific wall P1 is composed of first and second building structural materials (first and second wall panels 10, 20, 30, 40) arranged side by side and spaced apart from each other. In other words, the double structure described above is applied.

Furthermore, when a specific wall P1 among the multiple walls P that make up the building 300 is constructed from first and second building structural materials (first and second wall panels 30, 40) arranged side by side and spaced apart (the double structure), the wall P2 on the lower floor located below the specific wall P1 is also constructed from first and second building structural materials (first and second wall panels 10, 20) arranged side by side and spaced apart (the double structure).

Specifically, if one of the areas is a balcony 305 and the other area is a bedroom 306, the wall P1 erected between these areas will have a double structure. Furthermore, the wall P2 on the first floor, located below the wall P1 on the second floor that has a double structure, will also have a double structure.

Other patterns are as shown in FIG.
In Figure 8, the notation "outside air + NON" means the area outside the building that is adjacent to the area with the outside air attribute, the notation "outside air + outside air" means the wall between the area with the outside air attribute and the area with the outside air attribute, the notation "outside air + inside air" means the wall between the area with the outside air attribute and the area with the inside air attribute, and the notation "inside air + inside air" means the wall between the area with the inside air attribute and the area with the inside air attribute.
In addition, in FIG. 8, "W" indicates a double structure, and "S" indicates a single structure, which is a conventional structure having one wall panel.

As shown in Figure 8, in the case of "outside air + NON", if the upper floor has a double structure, the double structure will have no insulation between the first and second wall panels, and if the upper floor has a single structure, the single structure will have no insulation.
In the case of "outside air + outside air," if the upper floor is a double structure, it is considered to be a double structure with no insulation, and if the upper floor is a single structure, it is considered to be a single structure with no insulation.
In the case of "outside air + inside air," as mentioned above, a double structure with insulation is used.
In the case of "inner air" + "inner air", it is a normal inner wall, and if the upper floor is a double structure, it is a double structure inner wall, and if the upper floor is a single structure, it is a single structure inner wall.

[Building construction method]
9 to 12 are schematic perspective views showing a construction method for a building to which the heat insulating structure of the present invention is applied.
In the building 300 shown in Figures 9 to 12, a living room 302 is located to the right of an entrance 301, and a garage 303 is located to the left of the entrance 301. Furthermore, a storage room 304 is located at the back of the garage 303. There is also an open atrium above the garage 303, a balcony 305 is located above the entrance 301, and an upper floor bedroom 306 and balcony 305 are located above the living room 302 on the lower floor.

To construct such a building 300, first, as shown in FIG.
The lower connection member 80 and the half base 53 are placed on the foundation 50 on which the wall P constituting the living room 301 to which the double structure is applied is to be installed. Also, only the half base 53 is placed on the foundation 50 on which the wall P constituting the living room 302 to which the single structure is to be applied is to be installed.
Furthermore, the lower connection member 80 and the half base 53 are placed on the foundation 50 on which the wall P constituting the entrance 301 to which the double structure is applied is to be installed. Furthermore, only the half base 53 is placed on the foundation 50 on which the wall P constituting the entrance 301 to which the single structure is to be applied is to be installed.
Furthermore, the lower connection member 80 and the half base 53 are placed on the foundation 50 on which the wall P constituting the garage 303, which is to have the double structure, is to be installed. Furthermore, only the half base 53 is placed on the foundation 50 on which the wall P constituting the garage 303, which is to have the single structure, is to be installed.
Then, floor panels 60 and the like for the lower floor are placed at predetermined locations on the foundation 50.

Next, as shown in Figure 10, where a double structure is to be applied, the first wall panel 10 of the lower floor is placed on the lower connection member 80 and the side end of the floor panel 60, and the second wall panel 20 of the lower floor is placed on the lower connection member 80 and the half foundation 53. At this time, the first and second wall panels 10, 20 are placed with a gap between them, and then fastened together with anchor bolts.
In addition, in areas where a shingle structure is applied, the wall panel S is placed on the half base 53 and fastened with anchor bolts. Furthermore, the wall panel S is installed on the floor panel 60 that will become the interior wall of the living room.

Next, as shown in Figure 11, the floor panels 70 and girths 54 for the upper floor are placed on top of the wall bodies P that make up the entrance 301 and living room 302. At this time, upper connecting members 90 are placed on the upper floors where the walls to which the double structure will be applied will be located. Furthermore, girths (not shown) are placed on top of the wall bodies P that make up the garage 303, and upper connecting members (not shown) are placed where the double structure will be applied.

Next, as shown in Figure 12, where a double structure is to be applied, the first wall panel 30 of the upper floor is placed on the upper connecting member 90 (see Figure 11) and the side end of the floor panel 70 of the upper floor, and the second wall panel 40 of the upper floor is placed on the upper connecting member 90 and the girth 54 (see Figure 11). At this time, the first and second wall panels 30, 40 are placed with a gap between them, and then fastened together with girth bolts.
In addition, in areas where a single structure is used, the wall panel S is placed on the girth and fastened with girth bolts. Furthermore, the wall panel S is installed on the floor panel 70 that will become the interior wall of the living room.
In addition, roof panels Y, etc. are installed at predetermined locations on the wall panels 30, 40, and S on the upper floors.

As described above, the specified wall body P1 sandwiched between the outdoor air area Ra and the indoor air area Rb is composed of the first and second wall panels 10, 20, 30, 40 arranged side by side at a distance from each other, and a double structure is applied, so that the building 300 can have excellent thermal insulation properties.
Furthermore, when a specified wall P1 on an upper floor is made up of first and second wall panels 30, 40 arranged side by side and spaced apart from each other, a wall P2 on a lower floor located below the specified wall P1 is also made up of first and second wall panels 10, 20 arranged side by side and spaced apart from each other, so that the strength of the building 300 can be sufficiently ensured.

13 to 17 show a construction method for the building shown in FIGS. 9 to 12, in which a heat insulating material is provided between the first and second wall panels.
13 to 17, unlike the building 300 shown in Figures 9 to 12, a bedroom 407 is located above a garage 403. Note that reference numeral 401 denotes an entrance, reference numeral 402 denotes a living room, reference numerals 404 and 406 denote bedrooms, and reference numeral 405 denotes a balcony.

To construct such a building 400, first, as shown in Fig. 13, the lower connection member 80 and the half base 53 are placed on the foundation 50 on which the wall to which the double structure is to be applied is to be installed. Also, only the half base 53 is placed on the foundation 50 on which the wall to which the single structure is to be applied is to be installed.
Then, floor panels 60 and the like for the lower floor are placed at predetermined locations on the foundation 50.

Next, as shown in Figure 14, where a double structure is used, the first wall panel 10 of the lower floor is placed on top of the lower connecting member 80 and the side end of the floor panel 60. Where a single structure is used, a wall panel S is placed on top of the half base 53 and fastened with anchor bolts. Furthermore, a wall panel S is also installed on top of the floor panel 60, which will become the interior wall of the room.

Next, as shown in FIG. 15, among the walls employing the double structure, insulation material 100 is attached to the first wall panel 10 of the wall facing an area with an inside air attribute (e.g., living room 402, etc.). Note that among the walls employing the double structure, insulation material is not attached to the first wall panel 10 of the wall facing an area with an outside air attribute (e.g., garage 403, etc.).

Next, as shown in Figure 16, a second wall panel 20 is placed on the first wall panel 10 where the insulation material 100 has been attached, and fastened with anchor bolts. Furthermore, a second wall panel 20 is also placed on the first wall panel 10 that does not have insulation material 100 on the wall facing the garage 403, etc., and fastened with anchor bolts.

17, where a double structure is used, the first wall panel 30 of the upper floor is placed on the upper connecting member (not shown) and the side edge of the floor panel 70 of the upper floor, and the second wall panel 40 of the upper floor is placed on the upper connecting member (not shown) and girth (not shown). At this time, insulation may be provided between the first and second wall panels 30, 40 of the upper floor as needed, and then they are fastened together with girth bolts.
In addition, in areas where a single structure is used, the wall panel S is placed on a girth (not shown) and fastened with girth bolts. Furthermore, the wall panel S is also installed on the floor panel 70 that will become the interior wall of the living room.
In addition, roof panels Y, etc. are installed at predetermined locations on the wall panels 30, 40, and S on the upper floors.

Note that the lower connecting members 80 and upper connecting members 90 used in the buildings 300 and 400 described in Figures 9 to 17 are the portal-shaped members in side cross section described in the first embodiment, but are not limited to this. The lower connecting members 80A and 80B and upper connecting members 90A and 90B described in the second and third embodiments may also be used.

Although the buildings 300 and 400 described above are two-story buildings, the same construction method can be used for buildings with three or more stories.
18 and 19 are diagrams showing a construction method for a five-story building.
As shown in Figures 18 and 19, for a specific wall P1 among the multiple wall bodies P that make up a building 500, when one area on either side of the specific wall P1 is an outdoor air area Ra and the other area is an indoor air area Rb, the specific wall P1 has the double structure composed of first and second building structural materials (e.g., first and second wall panels 10, 20, 30, 40) arranged side by side and spaced apart from each other.

<Reference example>
Next, a reference example of a heat insulating structure for a building will be described with reference to FIGS. 20 and 21. FIG.
FIG. 20 is a diagram showing a thermal insulation structure of a building in which first and second wall panels are erected back to back without any space between them.
That is, the thermal insulation structure of the building 300 shown in FIG. 20 has a first building structural material (e.g., a first wall panel 10) and a second building structural material (e.g., a second wall panel 20) erected on the structural body of the building 300, and the first building structural material (the first wall panel 10) and the second building structural material (the first wall panel 20) are arranged within a wall that forms a wall line in a straight line in a plan view, and are arranged side by side back to back along the thickness direction of the wall without any space between them.
Specifically, the first and second wall panels 10C, 20C, 30C, 40C have facings 12C, 22C, 32C, 42C attached to only one side of the frame body 11C, 21C, 31C, 41C, and the hollow interior portion is filled with insulating material 13C, 23C, 33C, 43C.
The face materials 12C, 22C, 32C, and 42C of the wall panels 10C, 20C, 30C, and 40C are erected so as to be back-to-back with each other.
Because the first and second wall panels 10C, 20C, 30C, and 40C are back-to-back, the overall wall thickness of the first and second wall panels is thick, resulting in excellent thermal insulation. Therefore, for example, when providing a thermal insulation layer inside a single building structural material (wall panel), the thickness of the building structural material (wall panel) had to be increased to increase the thickness of the thermal insulation layer. However, with the thermal insulation structure of the building shown in Figure 20, multiple existing building structural materials (wall panels) are used, and the first wall panel 10C and the second wall panel 20C are installed back-to-back, allowing for easy wall thickness increase. This allows for cost-effective weight reduction and enhanced thermal insulation and structural strength.
Such a back-to-back structure may be applied to a part of the building according to the present invention.

Figure 21 shows an example in which the types of insulating materials filled in the first wall panels 10C, 30C and the second wall panels 20D, 40D are different, and this type of back-to-back structure may also be applied to part of a building according to the present invention.
Specifically, as mentioned above, the insulation materials 23D, 43D filled in the second wall panels 20D, 40D placed on the outside of the building are preferably foamed resin insulation materials with high insulating performance, while the insulation materials 13C, 33C filled in the third wall panels 10C, 30C placed on the inside of the building are preferably fiber insulation materials that allow for easy wiring work.
20 and 21, the same components as those in FIG. 2 are denoted by the same reference numerals.

10 First wall panel (first building structural material)
20 Second wall panel (second building structural material)
50 Foundation 80, 80A Connection member (lower connection member)
81 First connection portion 82 Second connection portion 83 Third connection portion 81A Fourth connection portion 82A Fifth connection portion 83A Driving member 100 Heat insulating material 300 Buildings P, P1, P2 Wall body Ra Outdoor air region Rb Indoor air region

Claims (2)

A building construction method comprising:
a step of attaching a surface material to one or both sides of a frame formed by assembling vertical and horizontal frame members into a rectangular shape to form a hollow structure, and filling the hollow space with a heat insulating material to manufacture a first building structural material and a second building structural material, which are wooden panels for construction;
A step of placing the side end of a floor panel of a lower floor on a foundation and placing a half foundation on the outside of the side end of the floor panel on the foundation;
A step of placing the first building structural member of the lower floor on the side end of the floor panel of the lower floor and placing the second building structural member of the lower floor on the half foundation;
a step of arranging the first building structural material of the lower floor and the second building structural material of the lower floor within a wall body that forms a wall line in a straight line in a plan view, and arranging them side by side in a back-to-back state with the face materials on one side in contact with each other along the thickness direction of the wall body without being spaced apart from each other;
and fastening an upper portion of an inner anchor bolt of the anchor bolts embedded in the foundation to a lower end portion of a first building structural material on the lower floor, and fastening an upper portion of an outer anchor bolt to a lower end portion of a second building structural material on the lower floor. The building construction method according to claim 1,
placing a floor panel of an upper floor on the first building structural member of the lower floor;
placing a girth on the second building structural member of the lower floor;
placing the first building structural member of the upper floor on the side edge of the floor panel of the upper floor;
A step of placing the second building structural material of the upper floor on the girth;
a step of connecting an upper end portion of the first building structural member of the lower floor and a lower end portion of the first building structural member of the upper floor with connecting bolts;
A building construction method characterized by comprising a step of connecting the upper end of the second building structural member of the lower floor to the lower end of the second building structural member of the upper floor with a connecting bolt.