outer wall structure

Abstract

The challenge is to ensure that the design around the sash does not deteriorate even when the insulation board is attached to the indoor surface of the exterior wall. [Solution] The exterior wall structure comprises an existing exterior wall (10) having a first opening (19), a sash (40) attached to the inside of the first opening (19), an existing frame (25) attached to the inner periphery of the first opening (19) closer to the interior than the sash (40), an insulation board (30) attached to the interior surface of the existing exterior wall (10), a gypsum board (35) attached to the insulation board (30), and an additional frame (36), wherein the insulation board (30) and the gypsum board (35) have a second opening (39) facing the first opening (19), and the additional frame (36) is attached to the inner periphery of the second opening (39) closer to the interior than the existing frame (25).

Description

[Technical Field]

[0001] The present invention relates to an exterior wall structure. [Background technology]

[0002] Patent Document 1 discloses a renovation method in which insulation is overlaid on an interior wall, such as gypsum board, that forms the interior surface of an exterior wall. The exterior wall has an opening, a sash is installed in the opening, and a frame is installed along the inner periphery of the opening on the indoor side of the sash frame. To allow access to the sash from indoors, the insulation is overlaid on the interior wall without overlapping the sash or frame. The visible surface of the frame is exposed and not covered by the insulation. The frame was installed before the renovation, and the visible surface of the old frame detracts from the design aesthetic of the area around the sash. Because the visible surface of the insulation is exposed on the indoor side of the frame, the exposed surface of the insulation detracts from the design aesthetic of the area around the sash. There is a step between the visible surface of the frame and the visible surface of the insulation, which detracts from the design aesthetic of the area around the sash. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-008461 Summary of the Invention [Problem to be solved by the invention]

[0004] Therefore, the problem that the present invention aims to solve is to prevent the design quality around the sash from being impaired even when an insulating board is attached to the indoor surface of an exterior wall. [Means for solving the problem]

[0005] The following reference numerals in parentheses refer to FIGS. 1 to 5.

[0006] According to claim 1, the exterior wall structure comprises an existing exterior wall (10) having a first opening (19), a sash (40) attached to the inside of the first opening (19), an existing frame (25) attached to the inner periphery of the first opening (19) closer to the interior than the sash (40), an insulating board (30) attached to the indoor surface of the existing exterior wall (10), a gypsum board (35) attached to the insulating board (30), and an additional frame (36), wherein the insulating board (30) and the gypsum board (35) have a second opening (39) facing the first opening (19), and the additional frame (36) is attached to the inner periphery of the second opening (39) closer to the interior than the existing frame (25).

[0007] According to claim 1, since the additional frame (36) is attached to the inner periphery of the second opening (39), the exposed surfaces of the heat insulating board (30) and the gypsum board (35) inside the second opening (39) are hidden by the additional frame (36), which improves the design of the periphery of the sash (40).

[0008] According to claim 2, in the exterior wall structure according to claim 1, the additional frame (36) is joined to the facing surface of the existing frame (25).

[0009] According to claim 2, the additional frame 36 is joined to the visible surface of the existing frame 25, so the visible surface of the existing frame 25 is hidden by the additional frame 36. This improves the design of the periphery of the sash 40.

[0010] According to claim 3, in the exterior wall structure described in claim 1 or 2, the visible surfaces of the upper, lower, left and right parts of the additional frame (36) are flush with the visible surfaces of the upper, lower, left and right parts of the existing frame (25).

[0011] According to claim 3 as described above, the visible surfaces of the upper, lower, left and right parts of the additional frame (36) are flush with the visible surfaces of the upper, lower, left and right parts of the existing frame (25), resulting in good design around the sash (40).

[0012] According to claim 4, the exterior wall structure according to claim 1 or 2 further comprises a decorative sheet (37) attached to the visible surfaces of the existing frame (25) and the additional frame (36).

[0013] According to the fourth aspect of the present invention, the decorative sheet (37) is attached to the visible surfaces of the existing frame (25) and the additional frame (36), so that the design around the sash (40) is good.

[0014] According to claim 5, the exterior wall structure according to claim 1 or 2 further comprises a table board (62) provided so as to extend from the lower part of the additional picture frame (36) toward the interior of the room.

[0015] According to claim 5 as described above, the table board (62), the additional picture frame (36) and the existing picture frame (25) can be used as a table.

[0016] According to claim 6, the exterior wall structure according to claim 1 or 2 further comprises a curtain rail (55), a roller curtain unit, a blind unit or a shoji screen (56) provided inside the additional frame (36).

[0017] According to claim 6, the curtain, roller curtain unit, blind unit, or shoji screen (56) separates the space inside the additional frame (36) and the existing frame (25) from the indoor space. The space inside the additional frame (36) and the existing frame (25) reduces heat transmission through the sash (40).

[0018] According to claim 7, the exterior wall structure according to claim 1 or 2 further comprises a heater (50) provided below the existing frame (25).

[0019] According to the seventh aspect of the present invention, the heat generated by the heater (50) contributes to preventing condensation on the sash (40) and suppressing the cold draft phenomenon. [Effects of the Invention]

[0020] According to the present invention, even if the heat insulating board is attached to the indoor surface of the exterior wall, the design around the sash is good. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 1 is a vertical cross-sectional view of the exterior wall structure. [Figure 2] FIG. 2 is a horizontal cross-sectional view of the exterior wall structure. [Figure 3] FIG. 3 is a vertical cross-sectional view of the exterior wall structure of the first modified example. [Figure 4] FIG. 4 is a vertical cross-sectional view of the exterior wall structure of the first modified example. [Figure 5] FIG. 5 is a vertical cross-sectional view of the exterior wall structure of the second modified example. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, embodiments will be described with reference to the drawings. Features and technical effects of the embodiments will be understood from the following detailed description and drawings. However, the scope of the present invention is not limited to the embodiments disclosed below. Because the drawings are provided for illustrative purposes only, the scope of the present invention is not limited to the examples in the drawings.

[0023] <1. Exterior wall structure and its components> Figure 1 is a vertical cross-sectional view of an exterior wall structure whose thermal insulation has been improved through renovation work, and Figure 2 is a horizontal cross-sectional view of the same exterior wall structure.

[0024] The exterior wall structure includes an existing exterior wall 10, a sash 40, an existing frame 25, an additional frame 36, a decorative sheet 37, a heater 50, and a curtain rail 55.

[0025] The existing exterior wall 10 is the outer perimeter wall of the building that was already installed before the renovation work. The existing exterior wall 10 separates the indoor and outdoor areas. The building on which the existing exterior wall 10 is installed may be made of wood, light steel frame, heavy steel frame, reinforced concrete, or steel-reinforced concrete. If the building is made of wood, it may have a wall structure, a frame structure, or both. A wall structure refers to a structure in which the building's load and seismic force are supported by walls. A frame structure refers to a structure in which the building's load and seismic force are supported by columns and beams, and optionally by braces. The building may be constructed using a panel construction method, a frame construction method, a frame panel construction method, a frame wall construction method, or a combination of two or more of these. The building may also be constructed using traditional construction methods. In one example, the building may be a wooden building with a wall structure constructed using a wood panel adhesive construction method, which is a type of panel construction method.

[0026] The existing exterior wall 10 has a wall body 11, existing gypsum board 14 attached to the wall body 11 on the indoor side, and exterior material 15 installed on the wall body 11 outdoors. A waterproof sheet or a waterproof / breathable sheet may be provided between the exterior material 15 and the wall body 11. A ventilation layer 16 through which air passes, i.e., a cavity or gap, may be formed between the exterior material 15 and the wall body 11. If existing interior material such as wallpaper, wallpaper, decorative sheet, or ceramic tile is attached to the surface of the existing gypsum board 14 before the renovation work, the existing interior material may be peeled off during the renovation work, or may remain without being peeled off.

[0027] The wall body 11 is a wooden wall body constructed using a panel construction method. That is, the wall body 11 may have multiple wood panels arranged and joined in a plane direction. The in-plane direction refers to a direction perpendicular to the thickness direction of the wall body 11, i.e., a direction along the front and back surfaces of the wall body 11. The in-plane direction is also called the facing direction. The wood panel has a wooden frame body 12 assembled into a rectangular frame, wooden facing panels 13 attached to the front and back surfaces of the frame body 12, and wooden auxiliary beams arranged vertically, horizontally, or vertically and horizontally inside the frame body. Note that the wall body 11 does not have to be a wooden wall body constructed using a panel construction method, but may also be a wooden wall body constructed using a frame construction method or a frame panel construction method, or may be a wall body made of light-gauge steel, heavy-gauge steel, or reinforced concrete.

[0028] The existing exterior wall 10 has a first opening 19 that corresponds to the height of the waist-high window. The first opening 19 penetrates from the indoor surface of the existing exterior wall 10 to the outdoor surface. A wooden support frame 20 is fixed to the existing exterior wall 10 along the inner periphery of the first opening 19. The support frame 20 is already installed. In other words, the support frame 20 was attached to the inner periphery of the first opening 19 before the renovation work began.

[0029] The sash 40 is fitted inside the support frame 20 and fixed to the support frame 20. The sash 40 may be an existing sash. In other words, the sash 40 may be fixed to the support frame 20 before the renovation work. The sash 40 may not be fixed to the inner periphery of the first opening 19 via the support frame 20, but may be fixed directly to the inner periphery of the first opening 19.

[0030] The sash 40 has a sash frame 41 and a shoji screen 42 provided inside the sash frame 41. The sash 40 is a sliding window sash in which the shoji screen 42 opens and closes in a sliding manner. The sash 40 does not have to be a sliding window sash, and may be, for example, a fixed window sash, a vertical sliding window sash, a horizontal sliding window sash, a tilting window sash, a casement window sash, or a louvered window sash.

[0031] The existing frame 25 is fixed to the support frame 20 along the inner periphery of the support frame 20, closer to the interior than the sash 40. The existing frame 25 may be fixed directly to the inner periphery of the first opening 19, rather than being fixed to the inner periphery of the first opening 19 via the support frame 20.

[0032] The insulation board 30 comprises a flat plastic foam board, carbonized cork board, fiber board, or fiber pile. The insulation board 30 may be a laminate of two or more of the plastic foam board, carbonized cork board, fiber board, and fiber pile. Plastic foam board is also called foam. Plastic foam board is made of, for example, polystyrene foam, urethane foam, or phenolic foam. Carbonized cork board is made by steaming cork chips under high temperature and pressure to solidify them into a flat plate. Fiber board is made by solidifying insulating fiber materials such as glass wool, rock wool, cellulose fiber, or wool into a flat plate using a binder. Fiber pile is made by depositing insulating fiber materials such as glass wool, rock wool, cellulose fiber, or wool into a flat plate. The fiber pile may also be made by filling a container such as a thin bag with fiber material and depositing it in the container to form a flat plate. Here, "deposit" is used to mean "accumulation" or "layering."

[0033] The gypsum board 35 is attached to the insulating board 30. When the insulating board 30 is made of a fibrous material deposit, the insulating board 30 is prone to deformation due to its own weight, etc., so the gypsum board 35 may be attached to the insulating board 30 to maintain the shape of the insulating board 30 in a flat plate shape.

[0034] A second opening 39 is opened in the insulation board 30 and the gypsum board 35. The second opening 39 penetrates the insulation board 30 and the gypsum board 35 from the front surface of the gypsum board 35 to the back surface of the insulation board 30. The second opening 39 in the insulation board 30 and the gypsum board 35 faces the first opening 19 in the existing exterior wall 10. The size of the second opening 39 is the same as the size of the inner periphery of the support frame 20. However, if the existing frame 25 is directly fixed to the inner periphery of the first opening 19, the size of the second opening 39 will be the same as the size of the first opening 19.

[0035] The additional frame 36 is fixed to the insulation board 30 and the gypsum board 35 along the inner periphery of the second opening 39, closer to the interior than the existing frame 25. The additional frame 36 is joined to the facing surface of the existing frame 25. The facing surface of the existing frame 25 refers to the surface facing the interior. In the example shown in Figures 1 and 2, the additional frame 36 is doweled to the facing surface of the existing frame 25. That is, holes are drilled in the contact surfaces of the additional frame 36 and the existing frame 25, and the dowels 34 are fitted into the holes. The additional frame 36 may not be doweled to the existing frame 25, but may be mortised or joined with an adhesive.

[0036] The horizontal dimension of the inside of the additional frame 36 is equal to the horizontal dimension of the inside of the existing frame 25, and the vertical dimension of the inside of the additional frame 36 is equal to the vertical dimension of the inside of the existing frame 25. The projected surfaces of the top, bottom, left, and right parts of the additional frame 36 are flush with the projected surfaces of the top, bottom, left, and right parts of the existing frame 25, respectively. However, there may be a difference in level between the projected surface of the top of the additional frame 36 and the projected surface of the top of the existing frame 25. There may be a difference in level between the projected surface of the bottom of the additional frame 36 and the projected surface of the bottom of the existing frame 25. There may be a difference in level between the projected surface of the left part of the additional frame 36 and the projected surface of the left part of the existing frame 25. There may be a difference in level between the projected surface of the right part of the additional frame 36 and the projected surface of the right part of the existing frame 25.

[0037] The decorative sheet 37 is attached to the surfaces of the additional frame 36 and the existing frame 25. Specifically, the decorative sheet 37 is attached to the inner peripheral surfaces of the additional frame 36 and the existing frame 25 and to the facing surface of the additional frame 36. The inner peripheral surfaces of the additional frame 36 and the existing frame 25 are also called the facing surface. The facing surface of the additional frame 36 refers to the surface facing indoors.

[0038] Before the additional frame 36 is installed, a decorative sheet 37 is attached to the surfaces of the additional frame 36 and the existing frame 25. The depth dimension of the decorative sheet 37 is longer than the depth dimension of the additional frame 36, and the decorative sheet 37 extends beyond the exterior edge of the visible surface of the additional frame 36. After the additional frame 36 is joined to the existing frame 25, the protruding portion of the decorative sheet 37 is attached to the visible surface of the existing frame 25.

[0039] The heater 50 is attached to the existing frame 25, particularly to its lower visible surface. For example, the heater 50 may be embedded in a recess formed in the lower visible surface of the existing frame 25. The heater 50 may be covered with a decorative sheet 37. The heater 50 is an electric heater, a hot water heater, or an oil heater. The heat generated by the heater 50 contributes to preventing condensation on the sash 40. The heat generated by the heater 50 also suppresses the phenomenon of cold drafts.

[0040] The curtain rail 55 is attached to the upper visible surface of the additional frame 36. The curtain rail 55 is located near the indoor end of the additional frame 36. Note that instead of the curtain rail 55, a roller curtain unit or a blind unit may be attached to the upper visible surface of the additional frame 36.

[0041] FIG. 3 is a vertical cross-sectional view of an exterior wall structure according to a first modified example, and FIG. 4 is a horizontal cross-sectional view of an exterior wall structure according to a second modified example. As shown in FIGS. 3 and 4, instead of a curtain rail 55, a fitting, specifically a shoji screen 56, may be installed inside the additional frame 36. The shoji screen 56 may be a glass shoji screen, a light shoji screen, a sliding door shoji screen, a wooden shoji screen, or a snow-viewing shoji screen. The shoji screen 56 is installed inside the additional frame 36 in a sliding style so that it can be opened and closed. Instead of the shoji screen 56, the fitting installed inside the additional frame 46 may be a sash such as a sliding window sash, a fixed window sash, a vertical sliding window sash, a horizontal sliding window sash, a tilting window sash, a casement window sash, or a louvered window sash. This sash and the existing sash 40 form a double-sash structure.

[0042] FIG. 5 is a vertical cross-sectional view of the exterior wall structure of the second modified example. As shown in FIG. 5, multiple table tops 62 may be provided extending from the bottom of the additional picture frames 36 toward the interior of the building. The table tops 62 are retractable. For example, the table tops 62 are stored by being stacked on the lower projected surfaces of the existing picture frames 25 and the additional picture frames 36 so that they can be retracted into the interior of the existing picture frames 25 and the additional picture frames 36 using a sliding mechanism. When the table tops 62 are retracted from the inside of the existing picture frames 25 and the additional picture frames 36 toward the interior of the building using the sliding mechanism, the height of the tops of the table tops 62 are aligned with the height of the lower projected surfaces of the existing picture frames 25 and the additional picture frames 36, making the tops of the table tops 62 flush with the lower projected surfaces of the existing picture frames 25 and the additional picture frames 36. Therefore, the tops of the table tops 62 and the lower projected surfaces of the existing picture frames 25 and the additional picture frames 36 serve as tables.

[0043] When the table board 62 is stored by the slide mechanism, the table board 62 may be housed in the hollow of the existing picture frame 25 and the additional picture frame 36 .

[0044] As shown in Figure 5, when the top surface of the table board 62 is flush with the lower projected surfaces of the existing picture frame 25 and the additional picture frame 36, a diagonal member 63 may be placed diagonally between the additional picture frame 36 or the gypsum board 35 and the table board 62, so that the load of the table board 62 is borne by the additional picture frame 36 or the gypsum board 35 through the diagonal member 63. The diagonal member 63 is, for example, a stainless steel rod, a wooden rod, or a wire.

[0045] A folding mechanism may be employed instead of the sliding mechanism, and the table plate 62 may be folded by the folding mechanism so that it is stored inside the existing picture frame 25 and the additional picture frame 36 and overlaps the lower projected surfaces of the existing picture frame 25 and the additional picture frame 36. The folding mechanism folds the table plate 62 so that it overlaps the lower projected surfaces of the existing picture frame 25 and the additional picture frame 36, or unfolds the table plate 62 so that the top surface of the table plate 62 is flush with the lower projected surfaces of the existing picture frame 25 and the additional picture frame 36.

[0046] 5, the rack 65 may be installed inside the existing picture frame 25 and the additional picture frame 36, close to the visible left side of the existing picture frame 25 and the additional picture frame 36. The rack 65 is used, for example, as a bookshelf.

[0047] When the rack 65 is installed, the sash 40 may not have already been installed before the renovation work, but may be newly installed as part of the renovation work. In this case, the width of the sash 40 (the width refers to the dimension perpendicular to the plane of the paper in FIG. 5 ) may be narrower than the widths (the width refers to the dimension perpendicular to the plane of the paper in FIG. 5 ) of the existing frame 25 and the additional frame 36 by the depth (the depth refers to the dimension perpendicular to the plane of the paper in FIG. 5 ) of the rack 65, and the sash 40 may be fitted into the inside of the existing frame 25, excluding the rack 65. When a sash 40 having a width narrower than the width of the existing frame 25 is newly installed as part of the interior construction, the sides of the sash 40, i.e., the back of the sash 40 in the plane of the paper in FIG. 5 , may be blocked by a blocking material provided flush with the outdoor surface of the exterior material 15, and the side panel of the rack 65 may be joined to the blocking material.

[0048] <2. Modifications> In the above description, the lower edge of the first opening 19 is higher than floor level, and the height of the first opening 19 corresponds to the height of a waist-high window. Alternatively, the lower edge of the first opening 19 may be at floor level, and the height of the first opening 19 may correspond to the height of a French window. In this case, the existing frame 25 may not have a lower horizontal frame member, and the visible shape of the existing frame 25 may be a gate shape (inverted U-shape). When the existing frame 25 is gate-shaped, the additional frame 36 also does not have a lower additional horizontal frame member, and the visible shape of the additional frame 36 is gate-shaped.

[0049] <3. Summary> (1) Because the additional frame 36 is attached to the inner periphery of the second opening 39, the exposed surfaces of the heat insulating board 30 and the gypsum board 35 inside the second opening 39 are hidden by the additional frame 36. This improves the design of the periphery of the sash 40.

[0050] (2) Since the additional frame 36 is joined to the visible surface of the existing frame 25, the visible surface of the existing frame 25 is hidden by the additional frame 36. Therefore, the design around the sash 40 is good.

[0051] (3) The projected surfaces of the upper, lower, left and right parts of the additional frame 36 are flush with the projected surfaces of the upper, lower, left and right parts of the existing frame 25, so the design around the sash 40 is good.

[0052] (4) Since the decorative sheet 37 is attached to the visible surfaces of the existing frame 25 and the additional frame 36, the design around the sash 40 is good.

[0053] (5) A curtain, a roller blind unit, a blind unit, or fittings (such as a shoji screen 56) separates the space inside the additional frame 36 and the existing frame 25 from the indoor space. The space inside the additional frame 36 and the existing frame 25 reduces heat transmission through the sash 40.

[0054] (6) The heat generated by the heater 50 contributes to preventing condensation on the sash 40 and suppressing the cold draft phenomenon.

[0055] (7) Lining insulation using the insulation board 30 reduces the energy consumption for cooling or heating used within a building. Therefore, lining insulation using the insulation board 30 contributes to the promotion of carbon neutrality, the realization of a decarbonized society, and the achievement of the Sustainable Development Goals (SDGs). [Explanation of symbols]

[0056] 10 Existing external wall 19 First Opening 25 Existing frame 30 Insulation board 35 Gypsum board 36 Additional Frames 39 Second Opening 50 Heater 55 Curtain rail 56 Shoji screen 62 Table top

Claims

1. an existing exterior wall having a first opening; a sash attached to the inside of the first opening; an existing frame attached to an inner periphery of the first opening, closer to the interior than the sash; An insulating board attached to the indoor surface of the existing exterior wall; a gypsum board attached to the heat insulating board; and an additional frame; The heat insulating board and the gypsum board have a second opening opposite the first opening, The additional frame is attached to the inner periphery of the second opening closer to the interior than the existing frame. An exterior wall structure characterized by:

2. The exterior wall structure according to claim 1, The additional frame is joined to the front surface of the existing frame. An exterior wall structure characterized by:

3. The exterior wall structure according to claim 1 or 2, The projected surfaces of the top, bottom, left and right parts of the additional frame are flush with the projected surfaces of the top, bottom, left and right parts of the existing frame. An exterior wall structure characterized by:

4. The exterior wall structure according to claim 1 or 2, A decorative sheet to be attached to the prospective surfaces of the existing frame and the additional frame An exterior wall structure further comprising:

5. The exterior wall structure according to claim 1 or 2, A tabletop extending from the bottom of the additional frame toward the interior An exterior wall structure further comprising:

6. The exterior wall structure according to claim 1 or 2 A curtain rail, a roller curtain unit, a blind unit or a shoji screen that is provided inside the additional frame An exterior wall structure further comprising:

7. The exterior wall structure according to claim 1 or 2, A heater provided below the existing frame An exterior wall structure further comprising:

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