Airtight structure for building wall, building wall, and building

Abstract

To provide an airtight structure of a wall of a building capable of suppressing deterioration of airtightness in the wall of the building in which a device such as a receptacle box is arranged.SOLUTION: An airtight structure 5 of a wall of a building includes columns 6, 7, an inside wall panel 10, and a recessed structure 30. The inside wall panel 10 is arranged between the columns 6 and 7 in a front view. The inside wall panel 10 has an inside wall panel frame body 11 and a first moisture-proof sheet 41. The recessed part structural body 30 has a second moisture-proof sheet 44 arranged along the 30A of the recessed part. An end portion of the first moisture-proof sheet 41 is connected to an end portion of the second moisture-proof sheet 44.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present disclosure relates to airtight structures for walls of buildings, walls of buildings, and buildings. [Background technology]

[0002] A known exterior wall of a building is one that is composed of an inner wall panel and an exterior wall material. The inner wall panel includes a frame, a moisture-proof sheet, and a heat insulating material. In the inner wall panel described in Patent Document 1, the moisture-proof sheet is attached to the surface of the frame that faces the interior of the building. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-193592 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, in buildings, devices such as electrical outlet boxes may be installed inside walls. In the inner wall panel shown in Patent Document 1, a moisture-proof sheet is attached to the surface of the inner wall panel facing the interior of the room. Therefore, when installing the device inside the exterior wall, the moisture-proof sheet must be torn. The device is then inserted through the torn part in the moisture-proof sheet. However, with this construction method, because the moisture-proof sheet is torn, there is a risk that the airtightness of the building will be reduced even if the torn part in the moisture-proof sheet is repaired with tape or the like. [Means for solving the problem]

[0005] (1) An airtight structure for a wall of a building that solves the above-mentioned problems is an airtight structure for a wall of a building, comprising: a plurality of pillars; an inner wall panel arranged between adjacent pillars in a front view; and a recess structure arranged adjacent to the inner wall panel and having a recess that is recessed toward the outside of the room, wherein the inner wall panel has an inner wall panel frame body and a first moisture-proof sheet arranged on a first surface of the inner wall panel frame body facing the inside of the room, and the recess structure has a second moisture-proof sheet arranged along the recess, and an end of the second moisture-proof sheet is connected to an end of the first moisture-proof sheet.

[0006] According to this configuration, the second moisture-proof sheet is laid along the recess of the recess structure. This allows devices such as outlet boxes to be placed in the recess without tearing the second moisture-proof sheet. Therefore, it is possible to prevent a decrease in airtightness in a building due to the installation of outlet boxes, etc.

[0007] (2) In the airtight structure for a wall of a building described in (1) above, the recess structure is disposed between the pillar and the inner wall panel. With this configuration, a device such as an outlet box can be disposed between the pillar and the inner wall panel.

[0008] (3) In the airtight structure of the wall of the building described in (2) above, the inner wall panel further has a first insulating material provided on a second surface on the outdoor side of the inner wall panel frame body, the recess structure further includes a recess frame body having a third surface on the indoor side and a fourth surface on the outdoor side and having the recess, and a second insulating material provided on the fourth surface on the outdoor side of the recess frame body, and the second moisture-proof sheet has a first portion arranged between the recess frame body and the second insulating material, a second portion extending from the first portion and arranged along the side surface of the recess frame body, and a third portion extending from the second portion and extending laterally from the recess frame body.

[0009] With this configuration, the second moisture-proof sheet can be arranged along the recess on the outside of the recess frame in a plan view, which allows the interior space of the recess to be larger than when the second moisture-proof sheet is arranged inside the recess frame.

[0010] (4) In the airtight structure of the wall of the building described in (3) above, the recessed frame body comprises two vertical members, an upper member connecting the upper ends of the vertical members, a lower member connecting the lower ends of the vertical members, and an intermediate member connecting the two vertical members between the upper member and the lower member, and the upper member and the intermediate member are provided with through holes.

[0011] According to this configuration, the recessed frame is reinforced by the intermediate member. Furthermore, since the upper member and the intermediate member are provided with through holes, wiring and the like can be easily passed through the recessed frame.

[0012] (5) In the airtight structure for a building wall described in (3) or (4) above, the thickness of the second insulating material is smaller than the thickness of the first insulating material. This configuration allows for a larger space inside the wall on the indoor side in front of the second insulating material. This allows for a larger depth of the recessed structure compared to when the thickness of the second insulating material is equal to the thickness of the first insulating material. This makes it easier to place a device with a large depth in the recessed structure.

[0013] (6) In the airtight structure for a wall of a building described in (1) above, the recess structure is arranged at a position closer to the interior of the room than the pillar so as to overlap with the pillar in a front view. With this configuration, a device such as an outlet box can be arranged in front of the pillar.

[0014] (7) In the airtight structure of the wall of a building described in (6) above, the inner wall panels include a first inner wall panel arranged on one end side of the column in the width direction of the column, and a second inner wall panel arranged on the other end side of the column in the width direction of the column, and the recess of the recess structure includes the inner surface of the column on the indoor side, a first side end of the inner wall panel frame body of the first inner wall panel, and a second side end of the inner wall panel frame body of the second inner wall panel, and the second moisture-proof sheet has a first portion arranged to follow the inner surface of the column, a second portion extending from the first portion and having a portion along the first side end of the first inner wall panel and a portion along the second side end of the second inner wall panel, and a third portion extending outward from the second portion.

[0015] With this configuration, the inner surface of the pillar, the first side end of the first inner wall panel, and the second side end of the second inner wall panel are covered with the second moisture-proof sheet, thereby ensuring airtightness around the pillar.

[0016] (8) In the airtight structure for a wall of a building described in (7) above, the recess structure further includes a support bracket, and the support bracket has a main body portion fixed to the column, a first support portion provided at one end of the main body portion to support the first side end of the first inner wall panel, and a second support portion provided at the other end of the main body portion to support the second side end of the second inner wall panel. With this configuration, the first inner wall panel and the second inner wall panel can be supported by the support bracket.

[0017] (9) In the airtight structure for a wall of a building described in (8) above, the inner wall panel frame of the first inner wall panel has a first surface facing the interior of the room, a second surface facing the exterior of the room, and the first side end, the inner wall panel frame of the second inner wall panel has a first surface facing the interior of the room, a second surface facing the exterior of the room, and the second side end, the first support portion has a first portion contacting the first side end of the first inner wall panel and a second portion contacting the second surface of the first inner wall panel, and the second support portion has a third portion contacting the second side end of the second inner wall panel and a fourth portion contacting the second surface of the second inner wall panel. According to this configuration, the first inner wall panel is supported at two portions by the first support portion of the support bracket. The second inner wall panel is supported at two portions by the second support portion of the support bracket.

[0018] (10) In the airtight structure for a wall of a building described in (9) above, the first side end of the first inner wall panel has a first notch, the second side end of the second inner wall panel has a second notch, the first support portion further has a fifth portion that contacts the end of the first notch, and the second support portion further has a sixth portion that contacts the end of the second notch. According to this configuration, the first inner wall panel is supported at three portions by the first support portion of the support bracket. The second inner wall panel is supported at three portions by the second support portion of the support bracket.

[0019] (11) In the airtight structure for a wall of a building described in (7) to (10) above, the recess structure has a reinforcing member, and the reinforcing member is disposed between the first side end of the first inner wall panel and the second side end of the second inner wall panel, and connects the first side end of the first inner wall panel to the second side end of the second inner wall panel. According to this configuration, the first inner wall panel and the second inner wall panel are supported by the reinforcing member.

[0020] (12) In the airtight structure for a wall of a building described in (8) to (11) above, the column is made of two channel steels, and the support bracket has a fastener that is inserted between the two channel steels. With this configuration, the support bracket can be easily fixed to the column without drilling holes.

[0021] (13) A wall of a building that solves the above problem includes the airtight structure for a wall of a building described in any one of (1) to (12) above. With this configuration, an outlet box or the like can be installed on the wall of the building without the second moisture-proof sheet being torn. Therefore, a decrease in airtightness of the building due to the installation of an outlet box or the like can be suppressed.

[0022] (14) A building that solves the above problem includes the building wall described in (13). With this configuration, it is possible to prevent a decrease in airtightness in the building due to the installation of an outlet box or the like. [Effects of the Invention]

[0023] According to the present disclosure, it is possible to suppress a decrease in airtightness in a wall on which a device such as an outlet box is disposed. [Brief explanation of the drawings]

[0024] [Figure 1] FIG. 1 is a schematic diagram of a building. [Figure 2] FIG. 2 is a schematic diagram of a cross section of a wall of a building according to the first embodiment. [Figure 3] FIG. 2 is a front view of a wall of a building as seen from the indoor side in the first embodiment. [Figure 4] FIG. 2 is a perspective view of a wall of a building according to the first embodiment. [Figure 5] 5 is a cross-sectional view of the wall of the building taken along line 5-5 in FIG. 4. [Figure 6] FIG. 10 is a front view of a wall of a reference example. [Figure 7] FIG. 10 is a cross-sectional view of a wall of a reference example. [Figure 8]FIG. 10 is a schematic diagram of a cross section of a wall of a building according to a second embodiment. [Figure 9] FIG. 10 is a perspective view of a wall of a building according to the second embodiment. [Figure 10] 10 is a cross-sectional view of a wall of a building taken along line 10-10 in FIG. 9. [Figure 11] FIG. [Figure 12] FIG. [Figure 13] FIG. 10 is a perspective view of a modified example of the support fitting. [Figure 14] FIG. 10 is a cross-sectional view of a modified example of the support fitting. [Figure 15] FIG. 10 is a front view of a modified example of a wall of a building. [Figure 16] 16 is a cross-sectional view of a modified example of the wall of the building taken along line 16-16 in FIG. 15. DETAILED DESCRIPTION OF THE INVENTION

[0025] First Embodiment A building 1, a wall 4 of the building 1, and an airtight structure 5 of the wall 4 of the building 1 according to the first embodiment will be described with reference to Figures 1 to 7. Examples of the building 1 include a detached house, an apartment building, a commercial facility, and a public facility. The building 1 described in this embodiment is a detached house. In this embodiment and the second embodiment, the horizontal direction indicates the direction along the wall 4 of the building 1 in a plan view. The vertical direction is the same as the vertical direction of the wall 4 of the building 1. The depth direction indicates the direction perpendicular to the vertical and horizontal directions.

[0026] [Buildings] 1, a building 1 includes a foundation 2, a roof 3, and a wall 4 of the building 1. In this embodiment, the wall 4 of the building 1 represents an exterior wall that separates an interior 1A from an exterior 1B.

[0027] [Building wall] The wall 4 of the building 1 according to the first embodiment will be described with reference to Fig. 2. Fig. 2 shows the cross-sectional structure of the wall 4 of the building 1 according to this embodiment. In Fig. 2, the upper side of the drawing shows the exterior 1B, and the lower side of the drawing shows the interior 1A. The wall 4 of the building 1 includes columns 6, 7, and 8, an inner wall panel 10, an interior wall material 98, an exterior wall material 99, and a recess structure 30.

[0028] The interior wall material 98 is disposed on the interior side of the pillars 6, 7, and 8. The interior wall material 98 is disposed on the interior side surface of the inner wall panel 10. The interior wall material 98 is made of, for example, gypsum board. The interior wall material 98 is attached to the inner wall panel 10.

[0029] The exterior wall material 99 is disposed on the outdoor side of the pillars 6, 7, and 8. The exterior wall material 99 is made of, for example, a ceramic wall material, a concrete wall material, a metal wall material, or a resin wall material. The exterior wall material 99 is attached to the pillars 6, 7, and 8 with exterior metal fittings. When the pillars 6, 7, and 8 are made of wood, the exterior wall material 99 is fixed to a base material that is fixed to the pillars 6, 7, and 8.

[0030] As shown in FIG. 2 , the inner wall panel 10 is disposed between adjacent columns 6 and 7 in a front view. The inner wall panel 10 is disposed between the columns 6 and 7 in a front view. Here, the space between the columns 6 and 7 refers to the space between the center lines of the columns 6 and 7. In this embodiment, one side end 10A of the inner wall panel 10 overlaps the column 6 in a front view. The other side end 10B of the inner wall panel 10 does not overlap the column 7.

[0031] As shown in FIG. 1, building 1 has an airtight structure 1X for suppressing the movement of air or moisture between indoors 1A and outdoors 1B. The airtight structure 1X improves the thermal insulation of building 1. Airtight structure 1X is made up of moisture-proof sheets. Moisture-proof sheets are provided on each of the elements that make up building 1. The moisture-proof sheets of each of the elements are connected to each other with adhesive or tape. Airtight structure 1X of building 1 is made up by combining the airtight structures of each element of building 1. Wall 4 of building 1 has airtight structure 5.

[0032] [Airtight wall structure] The airtight structure 5 for the wall 4 according to the first embodiment will be described with reference to Figures 3 to 5. An interior wall material 98 and an exterior wall material 99 are omitted from Figures 3 to 5. The airtight structure 5 for the wall 4 in this embodiment includes a plurality of pillars 6, 7, an inner wall panel 10, and a recess structure 30.

[0033] The columns 6, 7 are composed of two channel steels 91. The inner wall panel 10 has an inner wall panel frame 11 and a first moisture-proof sheet 41. The inner wall panel frame 11 has a first surface 11A and a second surface 11B. The first surface 11A is the surface of the inner wall panel frame 11 facing the interior of the room. The second surface 11B is the surface of the inner wall panel frame 11 facing the exterior of the room.

[0034] 3 to 5, the inner wall panel frame 11 includes two vertical members 12A, 12B, an upper member 13, a lower member 14, and an intermediate member 15. The two vertical members 12A, 12B, the upper member 13, the lower member 14, and the intermediate member 15 are made of wood.

[0035] The upper member 13 connects the upper ends of the two vertical members 12A, 12B. The lower member 14 connects the lower ends of the two vertical members 12A, 12B. The intermediate member 15 connects the middle parts of the two vertical members 12A, 12B. The thickness in the depth direction of each of the upper member 13, lower member 14, and intermediate member 15 is smaller than the thickness of the vertical members 12A, 12B.

[0036] [First moisture-proof sheet] 3 to 5, the first moisture-proof sheet 41 is provided on the first surface 11A of the inner wall panel frame 11. The first moisture-proof sheet 41 is provided in the up-down direction from the upper end of the upper member 13 to the lower end of the lower member 14. The first moisture-proof sheet 41 is provided in the lateral direction from the first end 11C to the second end 11D of the first surface 11A of the inner wall panel frame 11.

[0037] As shown in Figures 4 and 5, the inner wall panel 10 further has a first insulating material 51. The first insulating material 51 is provided on the second surface 11B of the inner wall panel frame 11. Specifically, the first insulating material 51 is provided on the second surface 11B of the inner wall panel frame 11. The first insulating material 51 is configured so as to be able to be accommodated in the space between the inner wall panel frame 11 and the exterior wall material 99.

[0038] 4 and 5, additional insulating material 54 may be disposed in the inner wall panel frame 11. The additional insulating material 54 is provided along the vertical members 12A and 12B.

[0039] As shown in Figure 5, the inner wall panel frame 11 and the first insulating material 51 are arranged within the wall 4 of the building 1 as follows. The inner wall panel frame 11 is arranged between the column 6 and the column 7 in a front view. Here, the space between the column 6 and the column 7 refers to the space between the center line of the column 6 and the center line of the column 7. The inner wall panel frame 11 is arranged inside the room relative to the column 6 and the column 7. The additional insulating material 54, which is provided along the vertical member 12A, is arranged between the column 6 and the vertical member 12A. The first insulating material 51 is provided in the depth direction from near the second surface 11B of the inner wall panel frame 11 to the exterior wall material 99.

[0040] [Concave structure] As shown in Figure 2, the recessed portion structure 30 has a recessed portion 30A recessed toward the exterior 1B. The recessed portion structure 30 is provided adjacent to the inner wall panel 10. The recessed portion structure 30 is also disposed between the pillar 7 and the inner wall panel 10. An outlet box 93 is disposed in the recessed portion structure 30. The outlet box 93 is disposed in the recessed portion 30A of the recessed portion structure 30.

[0041] 3 to 5, the recess structure 30 includes a recess frame 31 and a second insulating material 52. The recess frame 31 has a third surface 31A and a fourth surface 31B. The third surface 31A is the surface of the recess frame 31 facing the indoor side. The fourth surface 31B is the surface of the recess frame 31 facing the outdoor side.

[0042] The recessed frame 31 includes two vertical members 32, an upper member 33, a lower member 34, and an intermediate member 35. The upper member 33 connects the upper ends of the vertical members 32 together. The lower member 34 connects the lower ends of the vertical members 32 together. The intermediate member 35 connects the two vertical members 32 between the upper member 33 and the lower member 34. The vertical members 32, the upper member 33, the lower member 34, and the intermediate member 35 are made of square timber. The vertical length of the vertical members 32 is equal to the length of the vertical members 12 of the inner wall panel frame 11. The depthwise thickness of the vertical members 32 is greater than the thickness of the vertical members 12 of the inner wall panel frame 11. The width of the vertical members 32 in the horizontal direction is smaller than the width of the vertical members 12 of the inner wall panel frame 11. The upper member 33 is provided with a through hole 95 for passing wiring 94 through. The intermediate member 35 is provided with a through hole 95 for passing the wiring 94 therethrough.

[0043] 5, the recessed portion frame 31 has a recessed portion 30A. Specifically, the recessed portion 30A has a space S that opens to the indoor side. The space S is defined by the two vertical members 32 of the recessed portion frame 31 and a second insulating material 52. The second insulating material 52 is provided on a fourth surface 31B of the recessed portion frame 31.

[0044] As shown in FIG. 5 , the recessed frame 31 in this embodiment is arranged as follows. The recessed frame 31 is arranged between the inner wall panel 10 and the additional vertical member 16. Additional insulation 54 is provided to support the recessed frame 31 and to insulate the wall 4 of the building 1. The additional vertical member 16 is arranged on the indoor side of the column 7. The horizontal width of the additional vertical member 16 is equal to or slightly smaller than half the horizontal width of the column 7. The additional vertical member 16 has a notch 92A where a corner on the indoor side is cut out. The additional insulation 54 is arranged between the additional vertical member 16 and the column 7.

[0045] The recessed portion frame 31 is arranged so that the third surface 31A of the recessed portion frame 31 is aligned with the first surface 11A of the inner wall panel frame 11 in the depth direction in a plan view. The second insulating material 52 is arranged on the fourth surface 31B of the recessed portion frame 31. The second insulating material 52 is arranged between the first insulating material 51 and the column 7 in a plan view. The thickness of the second insulating material 52 is smaller than the thickness of the first insulating material 51.

[0046] [Second moisture-proof sheet] As shown in FIGS. 3 to 5, the recess structure 30 has a second moisture-proof sheet 44. The size of the second moisture-proof sheet 44 in the up-down direction is the same as or larger than the first moisture-proof sheet 41. The second moisture-proof sheet 44 is arranged so as to fit along the recess 30A of the recess frame 31. An end of the second moisture-proof sheet 44 is connected to an end of the first moisture-proof sheet 41.

[0047] The specific arrangement of the second moisture-proof sheet 44 is as follows. The second moisture-proof sheet 44 has a first portion 44A, a second portion 44B, and a third portion 44C. The second moisture-proof sheet 44 further has a fourth portion 44D and a fifth portion 44E. The third portion 44C includes one end of the second moisture-proof sheet 44 in the lateral direction. The fifth portion 44E includes the other end of the second moisture-proof sheet 44 in the lateral direction.

[0048] The first portion 44A is disposed between the recessed portion frame 31 and the second insulating material 52. Specifically, the first portion 44A is disposed between the fourth surface 31B of the recessed portion frame 31 and the second insulating material 52. The second portion 44B extends from an end of the first portion 44A closer to the inner wall panel frame 11. The second portion 44B is disposed between an end 11E of the second surface 11B of the inner wall panel frame 11 and the first side surface 31C of the recessed portion frame 31. The second portion 44B is disposed along the first side surface 31C of the recessed portion frame 31. The third portion 44C extends from the second portion 44B. The third portion 44C extends laterally from the recessed portion frame 31. Specifically, the third portion 44C extends so as to overlap an end of the first moisture-proof sheet 41 provided on the first surface 11A of the inner wall panel frame 11 in a plan view. The third portion 44C is connected to the end of the first moisture-proof sheet 41. Specifically, the third portion 44C is connected to the end of the first moisture-proof sheet 41 with waterproof tape. The fourth portion 44D extends from the end of the first portion 44A that is closer to the pillar 7. The fourth portion 44D passes between the side surface 16A of the additional vertical member 16 and the second side surface 31D of the recess frame 31. The fifth portion 44E extends to overlap the inner side surface 16B of the additional vertical member 16.

[0049] As shown in FIGS. 3 to 5, the outlet box 93 is provided in the space S within the recess 30A of the recess frame 31. Wiring 94 is connected to the outlet box 93. The wiring 94 passes through a through hole 95 of the upper member 33 and a through hole 95 of the intermediate member 35. An additional heat insulating material 54 may be provided within the recess 30A of the recess frame 31.

[0050] [Operation of this embodiment] The operation of this embodiment will be described. First, with reference to Figures 6 and 7, an airtight structure 5 for a wall 4 of a building 1 of the reference example will be described. The airtight structure 5 for a wall 4 of a building 1 of the reference example includes a plurality of pillars 6, 7 and an inner wall panel 10. The inner wall panel 10 includes an inner wall panel frame 11 and a first moisture-proof sheet 41. The outlet box 93 is disposed on the outdoor side of the inner wall panel 10 and the first moisture-proof sheet 41. For this reason, in the airtight structure 5 for a wall 4 of a building 1 of the reference example, the first moisture-proof sheet 41 is broken in order to install the outlet box 93.

[0051] The airtight structure 5 of the wall 4 of the building 1 according to this embodiment includes pillars 6, 7, an inner wall panel 10, and a recess structure 30. The inner wall panel 10 is disposed between the pillars 6, 7 in a front view. The inner wall panel 10 has an inner wall panel frame 11 and a first moisture-proof sheet 41. The recess structure 30 has a second moisture-proof sheet 44 disposed along the recess 30A. An end of the second moisture-proof sheet 44 is connected to an end of the first moisture-proof sheet 41.

[0052] According to this configuration, the second moisture-proof sheet 44 is laid along the recess 30A of the recess structure 30. This allows devices such as the outlet box 93 to be placed in the recess 30A without tearing the second moisture-proof sheet 44. Therefore, it is possible to prevent a decrease in airtightness of the building 1 due to the installation of the outlet box 93, etc.

[0053] [Effects of this embodiment] The effects of this embodiment will be described. (1) The airtight structure 5 of the wall 4 of the building 1 includes pillars 6 and 7, an inner wall panel 10, and a recessed portion structure 30. The inner wall panel 10 is disposed between the pillars 6 and 7 in a front view. The inner wall panel 10 includes an inner wall panel frame 11 and a first moisture-proof sheet 41. The recessed portion structure 30 includes a second moisture-proof sheet 44 disposed along the recessed portion 30A. An end of the second moisture-proof sheet 44 is connected to an end of the first moisture-proof sheet 41. This allows the second moisture-proof sheet 44 to be laid along the recessed portion 30A of the recessed portion structure 30. This allows devices such as an outlet box 93 to be placed in the recessed portion 30A without tearing the second moisture-proof sheet 44. Therefore, a decrease in airtightness due to the installation of the outlet box 93 or the like can be suppressed in the building 1.

[0054] (2) In the airtight structure 5 of the wall 4 of the building 1, the recess structure 30 is disposed between the pillar 7 and the inner wall panel 10. This allows devices such as an outlet box 93 to be disposed between the pillar 7 and the inner wall panel 10.

[0055] (3) In the airtight structure 5 of the wall 4 of the building 1, the inner wall panel 10 further has a first insulating material 51 provided on the second outdoor-side surface 11B of the inner wall panel frame 11. The recessed structure 30 further has a recessed frame 31 and a second insulating material 52. The recessed frame 31 has a third indoor-side surface 31A and a fourth outdoor-side surface 31B. The second insulating material 52 is provided on the fourth outdoor-side surface 31B of the recessed frame 31. The second moisture-proof sheet 44 has a first portion 44A, a second portion 44B, and a third portion 44C. The first portion 44A is disposed between the recessed frame 31 and the second insulating material 52. The second portion 44B extends from the first portion 44A. The second portion 44B is disposed along the first side surface 31C and the second side surface 31D of the recessed frame 31. The third portion 44C extends from the second portion 44B. The third portion 44C extends laterally from the recess frame 31. This allows the second moisture-proof sheet 44 to be arranged along the recess 30A on the outside of the recess frame 31 in a plan view. This allows the internal space within the recess 30A to be larger than when the second moisture-proof sheet 44 is arranged inside the recess frame 31.

[0056] (4) In the airtight structure 5 of the wall 4 of the building 1, the recessed frame 31 has two vertical members 32, an upper member 33, a lower member 34, and an intermediate member 35. The upper member 33 connects the upper ends of the vertical members 32 together. The lower member 34 connects the lower ends of the vertical members 32 together. The intermediate member 35 connects the two vertical members 32 between the upper member 33 and the lower member 34. Through holes 95 are provided in the upper member 33 and the intermediate member 35. This allows the recessed frame 31 to be reinforced by the intermediate member 35. Furthermore, by providing the through holes 95 in the upper member 33 and the intermediate member 35, wiring 94 and the like can be easily passed through the recessed frame 31.

[0057] (5) In the airtight structure 5 of the wall 4 of the building 1, the thickness of the second insulating material 52 is smaller than the thickness of the first insulating material 51. This allows the space inside the wall 4 on the indoor side in front of the second insulating material 52 to be larger. This allows the depth of the recessed structure 30 to be larger than when the thickness of the second insulating material 52 is equal to the thickness of the first insulating material 51. This makes it easier to place a device with a large depth in the recessed structure 30.

[0058] (6) The wall 4 has the airtight structure 5. As a result, the wall 4 having the airtight structure 5 can have the outlet box 93 and the like installed thereon without the second moisture-proof sheet 44 being broken.

[0059] (7) The building 1 includes the above-described wall 4. This makes it possible to prevent a decrease in airtightness of the building 1 due to the installation of the outlet box 93 and the like.

[0060] Second Embodiment 8 to 14, a building 1, a wall 4 of the building 1, and an airtight structure 5 of the wall 4 of the building 1 according to the second embodiment will be described. In this embodiment, components common to the first embodiment are given the same reference numerals as those in the first embodiment, and descriptions of overlapping components will be omitted.

[0061] [Buildings] The building 1 includes a foundation 2, a roof 3, and walls 4 of the building 1 (see FIG. 1). In this embodiment, the walls 4 represent exterior walls that separate an interior 1A from an exterior 1B.

[0062] [Building wall] The wall 4 of the building 1 according to the second embodiment will be described with reference to Fig. 8. Fig. 8 shows the structure of the wall 4 of the building 1 according to this embodiment. In Fig. 8, the upper side of the drawing shows the exterior 1B, and the lower side of the drawing shows the interior 1A. The wall 4 of the building 1 includes columns 6, 7, and 8, an inner wall panel 10, an interior wall material 98, an exterior wall material 99, and a recess structure 30.

[0063] The wall 4 of the building 1 includes a first inner wall panel 21 and a second inner wall panel 27 as inner wall panels 10. The first inner wall panel 21 is arranged between the column 6 and the column 7 in a front view. The second inner wall panel 27 is arranged between the column 7 and the column 8 in a front view. Here, the space between the column 6 and the column 7 refers to the space between the center line of the column 6 and the center line of the column 7. The space between the column 7 and the column 8 refers to the space between the center line of the column 7 and the center line of the column 8. The first inner wall panel 21 is arranged on one end side of the column 7 in the width direction of the column 7. The second inner wall panel 27 is arranged on the other end side of the column 7 in the width direction of the column 7. In this embodiment, one side end portion 21A of the first inner wall panel 21 overlaps the column 6 in a front view. The other side end portion 21B (hereinafter referred to as a first side end portion 22C) of the first inner wall panel 21 does not overlap the column 7. In addition, one side end 27A (hereinafter referred to as second side end 28C) of the second inner wall panel 27 does not overlap the pillar 7 in a front view. The other side end 27B of the second inner wall panel 27 overlaps the pillar 8.

[0064] [Airtight wall structure] An airtight structure 5 for a wall 4 of a building 1 according to a second embodiment will be described with reference to Figures 9 and 10. In this embodiment, the airtight structure 5 for a wall 4 of a building 1 includes a plurality of pillars 6, 7, an inner wall panel 10, and a recess structure 30. An interior wall material 98 and an exterior wall material 99 are omitted from Figures 9 and 10.

[0065] The airtight structure 5 of the wall 4 includes a first inner wall panel 21 and a second inner wall panel 27 as inner wall panels 10. The first inner wall panel 21 has an inner wall panel frame 22 and a first moisture-proof sheet 42. The second inner wall panel 27 has an inner wall panel frame 28 and a first moisture-proof sheet 43. The inner wall panel frame 22 of the first inner wall panel 21 has a first surface 22A, a second surface 22B, and a first side end 22C. The first surface 22A is the indoor-facing surface of the inner wall panel frame 22 of the first inner wall panel 21. The second surface 22B is the outdoor-facing surface of the inner wall panel frame 22 of the first inner wall panel 21. The inner wall panel frame 28 of the second inner wall panel 27 has a first surface 28A, a second surface 28B, and a second side end 28C. The first surface 28A is the indoor-side surface of the inner wall panel frame 28 of the second inner wall panel 27. The second surface 28B is the outdoor-side surface of the inner wall panel frame 28 of the second inner wall panel 27.

[0066] As shown in Figures 9 and 10, the inner wall panel frame 22 of the first inner wall panel 21 includes two vertical members 23, an upper member 24, a lower member 25, and an intermediate member 26. The inner wall panel frame 28 of the second inner wall panel 27 has a structure similar to that of the inner wall panel frame 22 of the first inner wall panel 21. In Figure 10, the member of the inner wall panel frame 28 of the second inner wall panel 27 that corresponds to the vertical member 23 of the inner wall panel frame 22 of the first inner wall panel 21 is shown as a vertical member 29. For the first inner wall panel 21, the vertical member 23, upper member 24, lower member 25, and intermediate member 26 are made of wood. The vertical members 23 and 29 have cutouts 92. The cutouts 92 are formed by cutting out corners of the vertical members 23 and 29 facing the interior of the room. The cutouts 92 are fitted with the ends of fasteners that secure the first inner wall panel 21 and the second inner wall panel 27 to the pillars 6, 7. The inner wall panel frame 22 of the first inner wall panel 21 is positioned so that the cutout 92B of the vertical member 23A and the first cutout 92C of the vertical member 23B face the interior of the room. The inner wall panel frame 28 of the second inner wall panel 27 is positioned so that the second cutout 92D of the vertical member 29 faces the interior of the room.

[0067] The structure of the first inner wall panel 21 is substantially the same as that of the inner wall panel 10 of the first embodiment.

[0068] [First moisture-proof sheet] 9 and 10, the first moisture-proof sheet 42 of the first inner wall panel 21 is provided on the first surface 22A of the inner wall panel frame 22. The first moisture-proof sheet 43 of the second inner wall panel 27 is provided on the first surface 28A of the inner wall panel frame 28.

[0069] 9 and 10, the first inner wall panel 21 further has a third insulating material 53. The third insulating material 53 is provided on the second surface 22B of the inner wall panel frame 22 of the first inner wall panel 21. The second inner wall panel 27 also has a third insulating material 53. The third insulating material 53 is not shown in the second inner wall panel 27.

[0070] As shown in FIG. 10, additional insulating material 54 may be disposed in the inner wall panel frame 22 of the first inner wall panel 21 and the inner wall panel frame 28 of the second inner wall panel 27.

[0071] As shown in Figure 10, the inner wall panel frame 22 of the first inner wall panel 21 and the third insulating material 53 are arranged within the wall 4 as follows: The inner wall panel frame 22 of the first inner wall panel 21 is arranged between the column 6 and the column 7 in a front view. The third insulating material 53 is provided on the second surface 22B of the inner wall panel frame 22 of the first inner wall panel 21.

[0072] As shown in Figures 8 and 10, the recessed portion structure 30 has a recessed portion 30A recessed toward the exterior 1B. The recessed portion structure 30 is provided adjacent to the inner wall panel 10. That is, the recessed portion structure 30 is provided adjacent to the first inner wall panel 21 and the second inner wall panel 27. The recessed portion structure 30 is also arranged at a position closer to the interior of the room than the pillar 7. The recessed portion structure 30 is arranged so as to overlap with the pillar 7 in a front view. The recessed portion 30A of the recessed portion structure 30 includes the interior surface 7A of the pillar 7 facing the interior of the room, the first side end portion 22C of the inner wall panel frame 22 of the first inner wall panel 21, and the second side end portion 28C of the inner wall panel frame 28 of the second inner wall panel 27. An outlet box 93 is provided in the recessed portion structure 30. The outlet box 93 is arranged in the recessed portion 30A of the recessed portion structure 30.

[0073] [Support bracket] 9 to 12, the recess structure 30 further includes a support fitting 60. The support fitting 60 has a main body portion 61, a first support portion 62, and a second support portion 65.

[0074] 10 and 12, the main body 61 is in the shape of a rectangular plate. The support bracket 60 has a fastener 80. The main body 61 is fixed to the column 7 by the fastener 80. The fastener 80 includes a fixing bolt 81 and a nut 82. The fixing bolt 81 is inserted between two channel steels 91.

[0075] The fixing bolt 81 includes an insertion portion 81A, a locking portion 81B, and a fastening portion 81C. The insertion portion 81A is the portion where the fixing bolt 81 is inserted into the column 7. Specifically, the insertion portion 81A is disposed between a bottom surface 91A of the channel steel 91 and a bottom surface 91B of the channel steel 91. When the insertion portion 81A is inserted into the column 7, an end of the insertion portion 81A protrudes outside the column 7.

[0076] The locking portion 81B is the portion that fastens the fastener 80 to the pillar 7. The locking portion 81B extends from the insertion portion 81A and is bent so as to be perpendicular to the insertion portion 81A. The locking portion 81B is positioned so as to fit along the exterior surface 7B of the pillar 7 on the outdoor side when the fastener 80 is inserted.

[0077] The fastening portion 81C extends from the insertion portion 81A and is a portion to which the nut 82 is fastened. The main body portion 61 has a through-hole (not shown) in the center. The fastening portion 81C passes through the through-hole of the main body portion 61. The main body portion 61 is fixed to the pillar 7 by fastening the fastening portion 81C with the nut 82.

[0078] 11, the first support portion 62 is provided at one end of the main body portion 61. One end of the main body portion 61 is a first end portion 61A. The other end of the main body portion 61 is a second end portion 61B. The first support portion 62 is provided at the first end portion 61A of the main body portion 61 of the support fitting 60.

[0079] The first support part 62 includes a first support part main body 63 and a first support part reinforcing body 64. The first support part main body 63 extends perpendicularly from the first end part 61A of the main body part 61 of the support fitting 60. The first support part main body 63 is provided with a through hole 63A through which a fastening fitting 96 such as a screw passes.

[0080] The main body 61 of the support fitting 60 has a first surface 61C and a second surface 61D. The first surface 61C is the surface facing the indoors. The second surface 61D is the surface facing the outdoors. The first support body 63 has a first surface 63B and a second surface 63C. The first surface 63B is the surface that connects to the first surface 61C of the main body 61 of the support fitting 60. The second surface 63C is the surface opposite to the first surface 63B of the first support body 63.

[0081] The first support portion reinforcement 64 extends perpendicularly from the second surface 63C of the first support portion main body 63. The first support portion reinforcement 64 has a first surface 64A and a second surface 64B. The first surface 64A faces in the same direction as the first surface 61C of the main body 61 of the support fitting 60. The second surface 64B faces in the same direction as the second surface 61D of the main body 61 of the support fitting 60.

[0082] The first support portion 62 supports the first side end portion 22C of the inner wall panel frame body 22 of the first inner wall panel 21. Specifically, the first support portion 62 supports the first inner wall panel 21 with two portions. The first support portion 62 has a first portion 62A and a second portion 62B. The first portion 62A contacts the first side end portion 22C of the inner wall panel frame body 22 of the first inner wall panel 21. The first portion 62A corresponds to a part of the second surface 63C of the first support portion main body 63. A part of the second surface 63C of the first support portion main body 63 contacts the first side end portion 22C of the inner wall panel frame body 22 of the first inner wall panel 21. The second portion 62B corresponds to the first surface 64A of the first support portion reinforcement body 64. The second portion 62B contacts the second surface 22B of the inner wall panel frame body 22 of the first inner wall panel 21. The first inner wall panel 21 and the first portion 62A are fixed together with fasteners 96 such as screws.

[0083] 11, the second support portion 65 is provided at the other end of the main body portion 61. The second support portion 65 is provided at a second end portion 61B of the main body portion 61 of the support fitting 60.

[0084] The second support part 65 includes a second support part main body 66 and a second support part reinforcing body 67. The second support part main body 66 is provided with a through hole 66A through which a fastening metal fitting 96 such as a screw passes.

[0085] The second support body 66 further includes a first surface 66B and a second surface 66C. The first surface 66B is a surface that connects to the first surface 61C of the body 61. The second surface 66C is a surface opposite to the first surface 66B.

[0086] The second support portion reinforcement 67 extends perpendicularly from the second surface 66C of the second support portion main body 66. The second support portion reinforcement 67 has a first surface 67A and a second surface 67B. The first surface 67A faces in the same direction as the first surface 61C of the main body 61 of the support fitting 60. The second surface 67B faces in the same direction as the second surface 61D of the main body 61 of the support fitting 60.

[0087] The second support portion 65 supports the second side end portion 28C of the inner wall panel frame 28 of the second inner wall panel 27. Specifically, the second support portion 65 supports the second inner wall panel 27 with two portions. The second support portion 65 has a third portion 65A and a fourth portion 65B. The third portion 65A contacts the second side end portion 28C of the inner wall panel frame 28 of the second inner wall panel 27. The third portion 65A corresponds to a part of the second surface 66C of the second support portion main body 66. A part of the second surface 66C of the second support portion main body 66 contacts the second side end portion 28C of the inner wall panel frame 28 of the second inner wall panel 27. The fourth portion 65B contacts the second surface 28B of the inner wall panel frame 28 of the second inner wall panel 27. The fourth portion 65B corresponds to the first surface 67A of the second support portion reinforcement body 67. The first surface 67A of the second support portion reinforcement 67 contacts the second surface 28B of the inner wall panel frame 28 of the second inner wall panel 27. The second inner wall panel 27 and the third portion 65A are fixed together with fasteners 96 such as screws.

[0088] [Modified support bracket] 13 and 14, the support fittings 60 that support the first inner wall panel 21 and the second inner wall panel 27 may have the following structure. The specific structure of the modified support fittings 60 will be described.

[0089] The first side end 22C of the inner wall panel frame 22 of the first inner wall panel 21 has a first cutout 92C. One side end of the first cutout 92C has a corner 92E connected to the first side end 22C of the inner wall panel frame 22. The other side end of the first cutout 92C has a corner 92F connected to the first surface 22A of the inner wall panel frame 22.

[0090] The second side end 28C of the inner wall panel frame 28 of the second inner wall panel 27 has a second cutout 92D. One side end of the second cutout 92D has a corner 92G that connects to the second side end 28C of the inner wall panel frame 28. The other side end of the second cutout 92D has a corner 92H that connects to the first surface 28A of the inner wall panel frame 28.

[0091] As shown in Figures 13 and 14, the support fitting 70 has a main body portion 71, a first support portion 72, and a second support portion 76. The first support portion 72 is provided at one end of the main body portion 71. This one end of the main body portion 71 is a first end portion 71A. The other end of the main body portion 71 is a second end portion 71B. The first support portion 72 is provided at the first end portion 71A of the main body portion 71 of the support fitting 70.

[0092] The first support part 72 includes a first support part first body 73, a first support part second body 74, and a first support part reinforcing body 75. The first support part first body 73 is a rectangular plate. The first support part first body 73 extends perpendicularly from a first end part 71A of the body part 71 of the support fitting 70. The first support part first body 73 is connected to the body part 71 at the first end part 73A of the first support part first body 73.

[0093] The first support portion second body 74 extends from the second end 73B of the first support portion first body 73. The first support portion second body 74 extends obliquely in the opposite direction to the body portion 71 of the support fitting 70. The first support portion second body 74 is provided with a through hole 74A through which a fastening fitting 96 such as a screw passes.

[0094] The main body 71 has a first surface 71C and a second surface 71D. The first surface 71C is the surface facing the indoors. The second surface 71D is the surface facing the outdoor side. The first support part first main body 73 has a first surface 73C and a second surface 73D. The first surface 73C is the surface that connects to the first surface 71C of the main body 71 of the support fitting 70. The second surface 73D is the surface opposite to the first surface 73C of the first support part first main body 73. The first support part second main body 74 has a first surface 74B and a second surface 74C. The first surface 74B is connected to the first surface 73C of the first support part first main body 73. The second surface 74C is connected to the second surface 73D of the first support part first main body 73.

[0095] The first support portion reinforcement 75 extends perpendicularly from the second surface 73D of the first support portion first main body 73. The first support portion reinforcement 75 has a first surface 75A and a second surface 75B. The first surface 75A faces in the same direction as the first surface 71C of the main body 71 of the support fitting 70. The second surface 75B is the surface opposite to the first surface 75A of the first support portion reinforcement 75.

[0096] The first support portion 72 supports the first side end portion 22C of the inner wall panel frame body 22 of the first inner wall panel 21. The first support portion 72 has a first portion 72A and a second portion 72B. The first support portion 72 further has a fifth portion 72C that contacts the end of the first cutout portion 92C. The first portion 72A contacts the first side end portion 22C of the inner wall panel frame body 22 of the first inner wall panel 21. The first portion 72A corresponds to a part of the second surface 73D of the first support portion first main body 73. A part of the second surface 73D of the first support portion first main body 73 contacts the first side end portion 22C of the inner wall panel frame body 22 of the first inner wall panel 21. The second portion 72B contacts the second surface 22B of the inner wall panel frame body 22 of the first inner wall panel 21. The second portion 72B corresponds to the first surface 75A of the first support portion reinforcement 75. The first surface 75A of the first support portion reinforcement 75 contacts the second surface 22B of the inner wall panel frame body 22 of the first inner wall panel 21. The fifth portion 72C contacts the end of the first cutout 92C. The fifth portion 72C corresponds to the second surface 74C of the first support portion second main body 74. The second surface 74C of the first support portion second main body 74 is positioned so as to contact the corners 92E and 92F of the first cutout 92C. The first inner wall panel 21 and the fifth portion 72C are fixed together with fasteners 96 such as screws.

[0097] 13 and 14, the second support portion 76 is provided at the other end of the main body portion 71. The second support portion 76 is provided at the second end portion 71B of the main body portion 71 of the support fitting 70.

[0098] The second support part 76 includes a second support part first body 77, a second support part second body 78, and a second support part reinforcing body 79. The second support part first body 77 is a rectangular plate. The second support part first body 77 extends perpendicularly from the second end part 71B of the body part 71 of the support fitting 70. The second support part first body 77 is connected to the body part 71 at a first end part 77A of the second support part first body 77.

[0099] The second support portion second body 78 extends from the second end 77B of the second support portion first body 77. The second support portion second body 78 extends obliquely in the opposite direction to the body portion 71 of the support fitting 70. The second support portion second body 78 is provided with a through hole 78A through which a fastening fitting 96 such as a screw passes.

[0100] The second support portion first main body 77 has a first surface 77C and a second surface 77D. The first surface 77C is the surface that connects to the first surface 71C of the main body portion 71 of the support fitting 70. The second surface 77D is the surface of the second support portion first main body 77 opposite to the first surface 77C. The second support portion second main body 78 has a first surface 78B and a second surface 78C. The first surface 78B is connected to the first surface 77C of the second support portion first main body 77. The second surface 78C is connected to the second surface 77D of the second support portion first main body 77.

[0101] The second support portion reinforcement 79 extends perpendicularly from the second surface 77D of the second support portion first main body 77. The second support portion reinforcement 79 has a first surface 79A and a second surface 79B. The first surface 79A faces in the same direction as the first surface 71C of the main body 71 of the support fitting 70. The second surface 79B is the surface opposite to the first surface 79A of the second support portion reinforcement 79.

[0102] The second support portion 76 supports the second side end portion 28C of the inner wall panel frame body 28 of the second inner wall panel 27. The second support portion 76 has a third portion 76A and a fourth portion 76B. The second support portion 76 further has a sixth portion 76C that contacts the end of the second cutout portion 92D. The third portion 76A contacts the second side end portion 28C of the inner wall panel frame body 28 of the second inner wall panel 27. The third portion 76A corresponds to a part of the second surface 77D of the second support portion first main body 77. A part of the second surface 77D of the second support portion first main body 77 contacts the second side end portion 28C of the inner wall panel frame body 28 of the second inner wall panel 27. The fourth portion 76B contacts the second surface 28B of the inner wall panel frame body 28 of the second inner wall panel 27. The fourth portion 76B corresponds to the first surface 79A of the second support portion reinforcement 79. The first surface 79A of the second support portion reinforcement 79 contacts the second surface 28B of the inner wall panel frame body 28 of the second inner wall panel 27. The sixth portion 76C contacts the end of the second cutout 92D. The sixth portion 76C corresponds to the second surface 78C of the second support portion second main body 78. The second surface 78C of the second support portion second main body 78 is positioned so as to contact the corners 92G and 92H of the second cutout 92D. The second inner wall panel 27 and the sixth portion 76C are fixed together with fasteners 96 such as screws.

[0103] [Second moisture-proof sheet] The arrangement of the second moisture-proof sheet 45 in the second embodiment will be described with reference to Figures 9 and 10. As shown in Figures 9 and 10, the recess structure 30 has a second moisture-proof sheet 45. The size in the up-down direction of the second moisture-proof sheet 45 is the same as or larger than the first moisture-proof sheets 42, 43. The second moisture-proof sheet 45 of the recess structure 30 is arranged as follows. The second moisture-proof sheet 45 is arranged so as to follow the recess 30A. The ends of the second moisture-proof sheet 45 are connected to the ends of the first moisture-proof sheets 42, 43.

[0104] The specific arrangement of the second moisture-proof sheet 45 is as follows. The second moisture-proof sheet 45 has a first portion 45A, a second portion 45B, and a third portion 45C. The second moisture-proof sheet 45 further has a fourth portion 45D and a fifth portion 45E. The first portion 45A is arranged to fit along the inner surface 7A of the pillar 7. A support bracket 70 is attached to the pillar 7. Therefore, the first portion 45A of the second moisture-proof sheet 45 is arranged closer to the room than the support bracket 70. The second portion 45B extends from the end of the first portion 45A that is closer to the first inner wall panel 21. The second portion 45B is arranged to fit along the inside of the first support portion 72 of the support bracket 70. The second portion 45B is a portion that fits along the first side end portion 22C of the first inner wall panel 21. The third portion 45C extends from an end of the first portion 45A closer to the second inner wall panel 27. The third portion 45C is disposed along the inner side of the second support portion 76 of the support bracket 70. The third portion 45C is a portion that extends along the second side end portion 28C of the second inner wall panel 27. The fourth portion 45D extends from the second portion 45B. In plan view, the fourth portion 45D extends so as to overlap an end of the first moisture-proof sheet 42 provided on the first surface 22A of the inner wall panel frame 22 of the first inner wall panel 21. The fourth portion 45D is connected to the end of the first moisture-proof sheet 42. Specifically, the fourth portion 45D is connected to the end of the first moisture-proof sheet 42 by waterproof tape. The fifth portion 45E extends from the third portion 45C. In a plan view, the fifth portion 45E extends so as to overlap an end portion of the first moisture-proof sheet 43 provided on the first surface 28A of the inner wall panel frame 28 of the second inner wall panel 27. The fifth portion 45E is connected to the end portion of the first moisture-proof sheet 43. Specifically, the fifth portion 45E is connected to the end portion of the first moisture-proof sheet 43 by waterproof tape.

[0105] The outlet box 93 is provided in the space S within the recess 30A after the second moisture-proof sheet 45 has been provided.

[0106] [Reinforcing material] 9 , the recess structure 30 has a reinforcing member 97. The recess structure 30 is disposed between the first side end portion 22C of the inner wall panel frame body 22 of the first inner wall panel 21 and the second side end portion 28C of the inner wall panel frame body 28 of the second inner wall panel 27. The reinforcing member 97 connects the first side end portion 22C of the inner wall panel frame body 22 of the first inner wall panel 21 and the second side end portion 28C of the inner wall panel frame body 28 of the second inner wall panel 27.

[0107] <Effects> The effects of this embodiment will be described. (1) In the airtight structure 5 of the wall 4 of the building 1, the recess structure 30 is arranged at a position closer to the interior of the room than the pillar 7 so as to overlap with the pillar 7 in a front view. This allows devices such as an outlet box 93 to be arranged in front of the pillar 7.

[0108] (2) The airtight structure 5 of the wall 4 of the building 1 includes a first inner wall panel 21 and a second inner wall panel 27 as inner wall panels 10. The first inner wall panel 21 is disposed on one end side of the column 7 in the width direction of the column 7. The second inner wall panel 27 is disposed on the other end side of the column 7 in the width direction of the column 7. The recess 30A of the recess structure 30 includes the interior surface 7A of the column 7 facing the room, the first side end 22C of the inner wall panel frame 22 of the first inner wall panel 21, and the second side end 28C of the inner wall panel frame 28 of the second inner wall panel 27. The second moisture-proof sheet 45 has a first portion 45A, a second portion 45B, and a third portion 45C. The first portion 45A is disposed along the inner surface 7A of the column 7. The second portion 45B extends from the first portion 45A. The first portion 45A has a portion that follows the first side end 22C and a portion that follows the second side end 28C. The third portion 45C extends outward from the second portion 45B. This allows the inner surface 7A of the pillar 7, the first side end 22C of the first inner wall panel 21, and the second side end 28C of the second inner wall panel 27 to be covered by the second moisture-proof sheet 45. This ensures airtightness around the pillar.

[0109] (3) In the airtight structure 5 of the wall 4 of the building 1, the recess structure 30 includes a support bracket 60. The support bracket 60 includes a main body 61, a first support portion 62, and a second support portion 65. The main body 61 is fixed to the pillar 7. The first support portion 62 is provided at one end of the main body 61. The first support portion 62 supports the first side end portion 22C of the first inner wall panel 21. The second support portion 65 is provided at the other end of the main body 61. The second support portion 65 supports the second side end portion 28C of the second inner wall panel 27. This allows the first inner wall panel 21 and the second inner wall panel 27 to be supported by the support bracket 60.

[0110] (4) In the airtight structure 5 of the wall 4 of the building 1, the inner wall panel frame 22 of the first inner wall panel 21 has a first surface 22A facing the interior of the room, a second surface 22B facing the exterior of the room, and a first side end 22C. The inner wall panel frame 28 of the second inner wall panel 27 has a first surface 28A facing the interior of the room, a second surface 28B facing the exterior of the room, and a second side end 28C. The first support portion 62 has a first portion 62A and a second portion 62B. The first portion 62A contacts the first side end 22C of the first inner wall panel 21. The second portion 62B contacts the second surface 22B of the first inner wall panel 21. The second support portion 65 has a third portion 65A and a fourth portion 65B. The third portion 65A contacts the second side end 28C of the second inner wall panel 27. The fourth portion 65B contacts the second surface 28B of the second inner wall panel 27. As a result, the first inner wall panel 21 is supported at two portions by the first support portion 62 of the support fitting 60. The second inner wall panel 27 is supported at two portions by the second support portion 65 of the support fitting 60.

[0111] (5) In the airtight structure 5 for the wall 4 of the building 1, the first side end 22C of the first inner wall panel 21 has a first cutout 92C. The second side end 28C of the second inner wall panel 27 has a second cutout 92D. The recess structure 30 further includes a support bracket 70. The support bracket 70 includes a main body 71, a first support portion 72, and a second support portion 76. The first support portion 72 has a first portion 72A and a second portion 72B. The first support portion 72 also has a fifth portion 72C. The fifth portion 72C contacts the end of the first cutout 92C. The second support portion 76 has a third portion 76A and a fourth portion 76B. The second support portion 76 also has a sixth portion 76C. The sixth portion 76C contacts the end of the second cutout 92D. As a result, the first inner wall panel 21 is supported at three portions by the first support portion 72 of the support fitting 70. The second inner wall panel 27 is supported at three portions by the second support portion 76 of the support fitting 70.

[0112] (6) In the airtight structure 5 of the wall 4 of the building 1, the recess structure 30 has a reinforcing member 97. The reinforcing member 97 is disposed between the first side end portion 22C of the first inner wall panel 21 and the second side end portion 28C of the second inner wall panel 27. The reinforcing member 97 connects the first side end portion 22C of the first inner wall panel 21 and the second side end portion 28C of the second inner wall panel 27. As a result, the first inner wall panel 21 and the second inner wall panel 27 are supported by the reinforcing member 97.

[0113] (7) In the airtight structure 5 of the wall 4 of the building 1, the column 7 is composed of two channel steels 91. The support brackets 60, 70 have fasteners 80 that are inserted between the two channel steels 91. This allows the support brackets 60, 70 to be easily fixed to the column 7 without drilling holes.

[0114] <Modification> The above-described embodiments are examples of possible forms of the airtight structure 5 of the wall 4 of the building 1, the wall 4 of the building 1, and the building 1, and are not intended to limit the forms. The airtight structure 5 of the wall 4 of the building 1, the wall 4 of the building 1, and the building 1 may take forms different from those exemplified in the above-described embodiments. Examples of such forms include forms in which part of the configuration of the embodiments is replaced, modified, or omitted, or forms in which a new configuration is added to the embodiments. Modified examples of the embodiments are shown below.

[0115] As shown in Figures 15 and 16, the recess structure 30 may be provided on the upper part of the inner wall panel 10. Specifically, the length of the vertical member 12 is shortened, and the vertical length of the inner wall panel frame 11 is shortened. The vertical length of the first insulating material 51 is also set to the same height as the inner wall panel frame 11. The first moisture-proof sheet 41 is provided on the first surface 11A of the inner wall panel frame 11. The recess frame 31 is provided on the upper part of the inner wall panel frame 11. The vertical member 32 of the recess frame 31 is arranged along the horizontal direction and adjacent to the upper member 13 of the inner wall panel frame 11. The vertical member 32 of the recess frame 31 has the same length as the upper member 13 and lower member 14 of the inner wall panel frame 11. The second insulating material 52 is provided on the fourth surface 31B of the recess frame 31. The second moisture-proof sheet 44 is arranged along the recess 30A of the recess frame 31. The first portion 44A of the second moisture-proof sheet 44 is provided between the fourth surface 31B of the recessed frame 31 and the second insulating material 52. The second portion 44B of the second moisture-proof sheet 44 extends from an end of the first portion 44A that is closer to the inner wall panel frame 11. The second portion 44B is arranged along the first side surface 31C of the recessed frame 31. The second portion 44B is arranged between the vertical member 32A of the recessed frame 31 and the upper member 13 of the inner wall panel frame 11. The third portion 44C of the second moisture-proof sheet 44 extends from the second portion 44B. The third portion 44C extends toward the upper member 13 of the inner wall panel frame 11. The third portion 44C is connected to an end of the first moisture-proof sheet 41. The fourth portion 44D of the second moisture-proof sheet 44 extends from an end of the first portion 44A that is opposite to the second portion 44B. The fourth portion 44D is disposed along the second side surface 31D of the recessed portion frame 31. The outlet box 93 is disposed in the recessed portion 30A of the recessed portion frame 31.

[0116] This specification discloses the following techniques: [Appendix 1] Supplementary Note 1 is an airtight wall structure for a building. The airtight wall structure includes a plurality of pillars, an inner wall panel arranged between adjacent pillars in a front view, and a recess structure provided adjacent to the inner wall panel and having a recess recessed toward the outside. The inner wall panel includes an inner wall panel frame and a first moisture-proof sheet provided on a first surface of the inner wall panel frame facing the inside of the room. The recess structure includes a second moisture-proof sheet arranged along the recess. An end of the second moisture-proof sheet is connected to an end of the first moisture-proof sheet.

[0117] [Appendix 2] In the airtight structure of a wall of a building described in Appendix 1, the recess structure is disposed between the column and the inner wall panel.

[0118] [Appendix 3] In the airtight structure for a building wall described in Appendix 2, the inner wall panel further includes a first insulating material provided on a second outdoor-side surface of the inner wall panel frame. The recess structure further includes a recess frame having a third indoor-side surface and a fourth outdoor-side surface and having the recess, and a second insulating material provided on the fourth outdoor-side surface of the recess frame. The second moisture-proof sheet has a first portion disposed between the recess frame and the second insulating material, a second portion extending from the first portion and disposed along the side surface of the recess frame, and a third portion extending from the second portion and projecting laterally from the recess frame.

[0119] [Appendix 4] In the airtight structure for a wall of a building described in Supplementary Note 3, the recessed frame includes two vertical members, an upper member connecting the upper ends of the vertical members, a lower member connecting the lower ends of the vertical members, and an intermediate member connecting the two vertical members between the upper member and the lower member. The upper member and the intermediate member are provided with through holes.

[0120] [Appendix 5] In the airtight structure for a wall of a building described in Supplementary Note 3, the thickness of the second insulating material is smaller than the thickness of the first insulating material.

[0121] [Appendix 6] In the airtight structure for a wall of a building described in Supplementary Note 1, the recess structure is arranged at a position closer to the interior of the room than the pillar so as to overlap with the pillar in a front view.

[0122] [Appendix 7] In the airtight structure for a wall of a building described in Supplementary Note 6, the inner wall panels include a first inner wall panel arranged on one end side of the column in the width direction of the column, and a second inner wall panel arranged on the other end side of the column in the width direction of the column. The recess of the recess structure includes an inner surface on the indoor side of the column, a first side end of the inner wall panel frame of the first inner wall panel, and a second side end of the inner wall panel frame of the second inner wall panel. The second moisture-proof sheet has a first portion, a second portion, and a third portion. The first portion is arranged to fit along the inner surface of the column. The second portion has a portion extending from the first portion and along the first side end of the first inner wall panel and along the second side end of the second inner wall panel. The third portion extends outward from the second portion.

[0123] [Appendix 8] In the airtight structure for a wall of a building described in Supplementary Note 7, the recess structure further includes a support bracket. The support bracket has a main body portion, a first support portion, and a second support portion. The main body portion is fixed to the column. The first support portion is provided at one end of the main body portion and supports the first side end of the first inner wall panel. The second support portion is provided at the other end of the main body portion and supports the second side end of the second inner wall panel.

[0124] [Appendix 9] In the airtight structure for a wall of a building described in Appendix 8, the inner wall panel frame of the first inner wall panel has a first surface on the indoor side, a second surface on the outdoor side, and the first side end. The inner wall panel frame of the second inner wall panel has a first surface on the indoor side, a second surface on the outdoor side, and the second side end. The first support portion has a first portion that contacts the first side end of the first inner wall panel and a second portion that contacts the second surface of the first inner wall panel. The second support portion has a third portion that contacts the second side end of the second inner wall panel and a fourth portion that contacts the second surface of the second inner wall panel.

[0125] [Appendix 10] In the airtight structure for a wall of a building described in Supplementary Note 9, the first side end of the first inner wall panel has a first notch. The second side end of the second inner wall panel has a second notch. The first support portion further has a fifth portion that contacts the end of the first notch. The second support portion further has a sixth portion that contacts the end of the second notch.

[0126] [Appendix 11] In the airtight structure for a wall of a building described in Supplementary Note 7, the recess structure has a reinforcing member. The reinforcing member is disposed between the first side end of the first inner wall panel and the second side end of the second inner wall panel. The reinforcing member connects the first side end of the first inner wall panel and the second side end of the second inner wall panel.

[0127] [Appendix 12] In the airtight structure for a wall of a building described in Appendix 8, the column is composed of two channel steels. The support fitting has a fastener inserted between the two channel steels.

[0128] [Appendix 13] Supplementary Note 13 is a technology relating to a wall of a building. The wall of the building of Supplementary Note 13 has the airtight structure of the wall of the building according to any one of Supplementary Notes 1 to 12.

[0129] [Appendix 14] Appendix 14 is a technology related to buildings. The building of Appendix 14 has the wall of the building described in Appendix 13. [Explanation of symbols]

[0130] 1...building, 4...wall, 5...airtight structure, 6, 7...column, 7A...inner surface of column on the interior side, 10...inner wall panel, 11...inner wall panel frame, 11A...first surface of inner wall panel frame, 11B...second surface of inner wall panel frame, 21...first inner wall panel, 22...inner wall panel frame of first inner wall panel, 22A...first surface of inner wall panel frame of first inner wall panel, 22B...inner wall panel frame of first inner wall panel 22C...first side end portion of the inner wall panel frame of the first inner wall panel, 27...second inner wall panel, 28...inner wall panel frame of the second inner wall panel, 28A...first side of the inner wall panel frame of the second inner wall panel, 28B...second side of the inner wall panel frame of the second inner wall panel, 28C...second side end portion of the inner wall panel frame of the second inner wall panel, 30...recess structure, 30A...recess, 31...recess frame, 31 A...third surface of recessed frame body, 31B...fourth surface of recessed frame body, 32...vertical member, 33...upper member, 34...lower member, 35...intermediate member, 41, 42, 43...first moisture-proof sheet, 44, 45...second moisture-proof sheet, 44A, 45A...first portion of second moisture-proof sheet, 44B, 45B...second portion of second moisture-proof sheet, 44C, 45C...third portion of second moisture-proof sheet, 51...first insulating material, 52...second insulating material, 60, 70...support Bracket, 61, 71...main body, 62, 72...first support part, 62A, 72A...first part of first support part, 62B, 72B...second part of first support part, 65, 76...second support part, 65A, 76A...third part of second support part, 65B, 76B...fourth part of second support part, 72C...fifth part of first support part, 76C...sixth part of second support part, 80...fastener, 91...channel steel, 95...through hole, 97...reinforcing member.

Claims

1. An airtight structure of a wall of a building, Several pillars and an inner wall panel disposed between the adjacent columns in a front view; a recessed portion structure provided adjacent to the inner wall panel and having a recessed portion recessed toward the outside of the room, The inner wall panel has an inner wall panel frame and a first moisture-proof sheet provided on a first surface of the inner wall panel frame facing the interior of the room, the recess structure has a second moisture-proof sheet disposed along the recess, An end of the second moisture-proof sheet is connected to an end of the first moisture-proof sheet. Airtight structure of building walls.

2. The recess structure is disposed between the pillar and the inner wall panel. The airtight structure of a wall of a building according to claim 1.

3. The inner wall panel further includes a first insulating material provided on a second surface of the inner wall panel frame on the outdoor side, The recess structure further includes a recess frame having a third surface on the indoor side and a fourth surface on the outdoor side and having the recess; and a second insulating material provided on the fourth surface on the outdoor side of the recess frame, The second moisture-proof sheet has a first portion disposed between the recessed frame and the second heat insulating material, a second portion extending from the first portion and disposed along a side surface of the recessed frame, and a third portion extending from the second portion and projecting laterally from the recessed frame. The airtight structure of a wall of a building according to claim 2.

4. The recessed frame includes two vertical members, an upper member connecting upper ends of the vertical members, a lower member connecting lower ends of the vertical members, and an intermediate member connecting the two vertical members between the upper member and the lower member, The upper member and the intermediate member are provided with through holes. The airtight structure of a wall of a building according to claim 3.

5. The thickness of the second insulating material is smaller than the thickness of the first insulating material. The airtight structure of a wall of a building according to claim 3.

6. The recess structure is disposed at a position closer to the interior than the pillar so as to overlap with the pillar in a front view. The airtight structure of a wall of a building according to claim 1.

7. The inner wall panel includes a first inner wall panel arranged on one end side of the column in the width direction of the column, and a second inner wall panel arranged on the other end side of the column in the width direction of the column, the recess of the recess structure includes an inner surface on the indoor side of the pillar, a first side end portion of the inner wall panel frame body of the first inner wall panel, and a second side end portion of the inner wall panel frame body of the second inner wall panel, The second moisture-proof sheet has a first portion arranged along the inner surface of the pillar, a second portion extending from the first portion and having a portion along the first side end of the first inner wall panel and a portion along the second side end of the second inner wall panel, and a third portion extending outward from the second portion. The airtight structure for a wall of a building according to claim 6.

8. The recess structure further includes a support bracket, The support fitting has a main body portion fixed to the pillar, a first support portion provided at one end of the main body portion and supporting the first side end of the first inner wall panel, and a second support portion provided at the other end of the main body portion and supporting the second side end of the second inner wall panel. The airtight structure for a wall of a building according to claim 7.

9. The inner wall panel frame of the first inner wall panel has a first surface on the indoor side, a second surface on the outdoor side, and the first side end portion, The inner wall panel frame of the second inner wall panel has a first surface on the indoor side, a second surface on the outdoor side, and the second side end portion, the first support portion has a first portion that contacts the first side end of the first inner wall panel and a second portion that contacts the second surface of the first inner wall panel, The second support portion has a third portion that contacts the second side end of the second inner wall panel and a fourth portion that contacts the second surface of the second inner wall panel. The airtight structure for a wall of a building according to claim 8.

10. the first side edge of the first inner wall panel has a first notch; the second side edge of the second inner wall panel has a second notch; the first support portion further includes a fifth portion that contacts an end of the first cutout portion, The second support portion further includes a sixth portion that contacts an end of the second cutout portion. The airtight structure of a wall of a building according to claim 9.

11. the recess structure has a reinforcing member, the reinforcing member is disposed between the first side end of the first inner wall panel and the second side end of the second inner wall panel, and connects the first side end of the first inner wall panel and the second side end of the second inner wall panel. The airtight structure for a wall of a building according to claim 7.

12. The column is composed of two channel steels, The support bracket has a fastener inserted between the two channel steels. The airtight structure for a wall of a building according to claim 8.

13. A wall of a building comprising the airtight structure of a wall of a building according to any one of claims 1 to 12.

14. A building comprising a building wall according to claim 13.

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