JP6723809B2 - Building insulation structure - Google Patents

Description

The present invention relates to a heat insulating structure for a building.

Conventionally, various types of heat insulating structures for buildings have been studied. As this heat insulating structure, for example, in addition to the filling heat insulating construction method in which the heat insulating material is arranged between the frame members of the building, an external heat insulating method in which the heat insulating material is arranged on the outdoor side of the frame material of the building is known. As an example of this, Patent Document 1 discloses a heat insulating structure that uses both the filling heat insulating method and the external heat insulating from the viewpoint of obtaining high heat insulating properties.

JP 2005-120799 A

By the way, a fitting opening for accommodating fittings is usually formed in the outer wall of the building. According to a study made by the present inventor, when the filling insulation method and the outer insulation method are used together, an air leak location occurs around the opening for the fitting, and the airtightness is not sufficiently secured around the opening for the fitting. We have found that there are cases where In the heat insulating structure of Patent Document 1, no consideration is given to the opening for fittings, and there is room for further improvement from the viewpoint of ensuring airtightness around the opening for fittings.

The present invention has been made in view of such a problem, and an object thereof is to provide a heat insulating structure suitable for ensuring airtightness around a fitting opening when a filling heat insulating method and an external heat insulating method are used in combination. To provide.

One mode of the present invention for solving the above-mentioned subject is a heat insulating structure of a building.
The heat insulating structure for a building according to the first aspect includes a plurality of frame members that are vertically and horizontally spanned so as to form a first opening that is a part of a fitting opening and a plurality of second openings; A first heat insulating material to be housed inside each of the second openings and a plurality of frame members for joinery forming the first opening are arranged on the outdoor side, and a part of the joiner opening is placed inside A plurality of frame members for joinery that are formed, a second heat insulating material that is arranged on the outer peripheral side of the plurality of frame members and covers the plurality of frame members and the first heat insulating material from the outdoor side, and the frame member for joinery. And a first airtight member for blocking the flow of air that is about to flow out of the indoor space through the space between the crosspiece and the crosspiece.

According to the first aspect, it is possible to block the flow of air between the frame material for joinery and the crosspiece for joinery, which can be an air leak point when the filling insulation method and the exterior insulation method are used together. Therefore, the airtightness around the opening for fittings can be effectively ensured.

It is a figure which shows typically the heat insulation structure of the reference example which used the filling insulation method and the exterior insulation method together. It is a plane sectional view showing a part of outer wall part of a building in which the heat insulation structure of a 1st embodiment is used. It is a side sectional view showing a part of outer wall part of a building in which the heat insulation structure of a 1st embodiment is used. It is a side sectional view showing an outer wall part of a building of a 1st embodiment. It is a front view showing a plurality of frame members of a 1st embodiment. It is a figure which shows the panel body of 1st Embodiment typically, FIG.6(a) is a front view, FIG.6(b) is the sectional view on the AA line of FIG.6(a). It is a figure which shows typically the some crosspiece for fittings seen from the same viewpoint as FIG. It is a figure which shows typically the 2nd heat insulating material seen from the same viewpoint as FIG. It is a figure which shows typically the airtight tape seen from the same viewpoint as FIG. It is a figure which shows typically the outdoor side 1st airtight material (A) of 1st Embodiment. It is a plane sectional view showing a part of outer wall part of a building where the heat insulation structure of a 2nd embodiment is used. It is a side sectional view showing a part of outer wall part of a building in which the heat insulation structure of a 2nd embodiment is used.

Hereinafter, in the embodiments and the modified examples, the same reference numerals are given to the same components, and the duplicated description will be omitted. Further, in each drawing, for convenience of description, some of the constituent elements are omitted as appropriate, and the dimensions of the constituent elements are appropriately enlarged or reduced. In the following, different constituent elements having many common points are distinguished by adding “(A), (B)” or the like to the end of the reference numerals, and when collectively referred to, these are omitted.

First, the background that led to the present invention will be described. FIG. 1 is a diagram schematically showing a heat insulating structure 100 of a reference example in which a filling heat insulating method and an outer heat insulating method are used in combination. In this figure, the same components as those of the embodiment described later are designated by the same reference numerals.
In this heat insulating structure 100, a plurality of frame members 12 are spanned vertically and horizontally, and the plurality of frame members 12 accommodate the first opening 38, which is a part of the fitting opening 36, and the first heat insulating material 14 inside. A plurality of second openings 40 that are formed. When the filling insulation method and the exterior insulation method are used in combination, a plurality of fitting crosspieces 18 are arranged on the outdoor side of the fitting frame 12(A) in order to attach the fitting 22, and an opening for the fitting is provided inside thereof. A part of 36 is formed. A second heat insulating material 20 for external heat insulation is arranged on the outer peripheral side of the fitting crosspiece 18.

In this heat insulating structure 100, a space between the fitting crosspiece 18 and the sash 60, which may be an air leak point around the opening 36 for fitting, is sealed by the sash seal material 64, and the crosspiece 18 for fitting and the second heat insulation are provided. The boundary with the material 20 is sealed by the airtight tape 24. Therefore, it seems that the airtightness around the fitting opening 36 is secured.

However, as a result of an experimental examination by the present inventor, under the heat insulating structure 100, a space between the frame member 12(A) for joinery and the crosspiece 18 for joinery as shown in the range Sa becomes an air leak point. , And obtained new knowledge that the airtightness around the fitting opening 36 becomes insufficient. As a countermeasure against this, the first airtightness for blocking the flow of air (flow in the direction Fa in FIG. 1) that is about to flow out from the indoor space 72 through the space between the frame 12(A) for joinery and the crosspiece 18 for joinery. We have found that it is effective to use wood. Thereby, it is possible to prevent air leakage from the indoor space 72 between the frame material 12(A) for fittings and the crosspiece 18 for fittings, and effectively secure the airtightness around the opening 36 for fittings. Hereinafter, an embodiment of the heat insulating structure 10 conceived based on such knowledge will be described in detail.

(First embodiment)
FIG. 2 is a plan sectional view showing a part of an outer wall portion of a building in which the heat insulating structure 10 of the first embodiment is used, and FIG. 3 is a side sectional view thereof. In the figure, the first airtight material 30, the sash seal material 64, and the airtight tape 24, which will be described later, are emphasized and shown by thick lines.
The heat insulating structure 10 is a wall structure that uses both the filling heat insulating method and the outer heat insulating method. The heat insulating structure 10 mainly includes a plurality of frame members 12, a panel body 16 including a first heat insulating material 14, a plurality of fitting crosspieces 18, a second heat insulating material 20, a fitting 22, and an airtight tape 24. A furring strip 26, an exterior material 28, a first airtight material 30, and a second airtight material 32 (not shown). The heat insulating structure 10 of the present embodiment has one of the main characteristics of the first airtight material 30 and the second airtight material 32, but the peripheral structure will be described first.

FIG. 4 is a side sectional view showing an outer wall portion of a building, and FIG. 5 is a front view showing a plurality of frame members 12.
The plurality of frame members 12 serve as structural members for bearing the load applied to the building. The plurality of frame members 12 include a horizontal frame member bridged in the horizontal direction X (horizontal direction) and a vertical frame member bridged in the vertical direction Y (vertical direction). The frame member 12 of the present embodiment is a frame member used in the frame method, and the horizontal frame member includes a base, a body difference, a girder, a girder (not shown), a lintel, a window stand, and the like. The frame members include column members and the like. Interior materials 34 (see FIG. 2) are fixed to the indoor side surfaces of the plurality of frame members 12.

The plurality of frame members 12 are bridged vertically and horizontally so as to form a first opening 38 which is a part of the fitting opening 36 and a plurality of second openings 40. The first opening 38 and the plurality of second openings 40 are formed so as to be included in one vertical structural surface formed by the plurality of frame members 12. The frame member 12 includes a frame member 12(A) for joinery that forms the first opening 38. The frame member 12(A) for joinery in this embodiment is two pillar materials, a lintel and a window sill.

6A and 6B are diagrams schematically showing the panel body 16. FIG. 6A is a front view and FIG. 6B is a sectional view taken along the line AA of FIG. 6A.
The panel body 16 includes a first heat insulating material 14, a structural surface material 42, a seal piece 44, and an airtight material 45. The first heat insulating material 14 is used to realize the filling heat insulating method, and is housed so as to fit inside the first opening 38. The panel body 16 has a number corresponding to the number of the plurality of first openings 38 so that the first heat insulating material 14 is housed inside each of the plurality of first openings 38 (see FIG. 5 ). To be The first heat insulating material 14 is preferably composed of a material having moisture resistance in addition to heat insulating properties. This material is, for example, a foamed heat insulating material such as rigid urethane foam. The first heat insulating material 14 has a rectangular shape when viewed from the prospective direction Z and has a prospective dimension equivalent to that of the plurality of frame members 12. The projected direction Z here is the depth direction when the vertical structure surface formed by the plurality of frame members 12 is viewed from the front.

The structural face material 42 is structural plywood, OSB (Oriented Strand Board), or the like. The structural face material 42 is a structural material for bearing the load applied to the building, and has a role of increasing the proof stress of the plurality of frame members 12. The structural face material 42 is attached to the outdoor side surface of the first heat insulating material 14 by adhesion or the like. The structural face material 42 has an overhanging portion 42 a that projects outward from the outer peripheral portion of the first heat insulating material 14. As shown in FIG. 2, the panel body 16 holds the frame member 12 and the overhanging portion 42a with screws or the like in a state where the overhanging portion 42a of the structural face material 42 is applied to the outdoor side surface of the frame member 12. It is fixed by a tool (not shown).

The seal pieces 44 are attached along the four inner peripheral edges of the first heat insulating material 14. The seal piece 44 is made of, for example, a resin such as vinyl chloride resin, polyethylene resin, or the like, aluminum, or the like as a material, and has a flexible first surface on the indoor side, an ethylene-propylene-diene resin, a soft vinyl chloride resin. , And a second layer on the outdoor side made of a foamed resin material having elasticity such as urethane resin. As shown in FIG. 2, when the first heat insulating material 14 is fitted inside the first opening 38, the seal piece 44 is elastically deformed between the first heat insulating material 14 and the frame member 12. By being mounted, the space between them is sealed.

The airtight material 45 is attached to the indoor side surface of the projecting portion 42a of the structural surface material 42 by adhesion or the like. The airtight material 45 is composed of a foamed resin material having elasticity such as ethylene-propylene-diene resin, soft vinyl chloride resin, and urethane resin. The airtight member 45 is interposed between the structural face member 42 and the frame member 12(A) for fitting with elastic deformation, and seals between them. The airtight member 45 is arranged around the fitting 22 so as to continue in an annular shape.

FIG. 7: is a figure which shows typically the crosspiece 18 for fittings seen from the same viewpoint as FIG.
Each of the plurality of fitting crosspieces 18 (hereinafter, simply referred to as crosspieces 18) is arranged along the four side edges of the first opening 38 on the outdoor side of the plurality of joinery crosspieces 12(A). To be done. The plurality of crosspieces 18 are receiving members for attaching the fittings 22, and a third opening 46 which is a part of the fittings opening 36 is formed inside thereof. The crosspieces 18 include vertical crosspieces 18 (A) along the vertical direction Y and horizontal crosspieces 18 (B) along the horizontal direction X. As shown in FIG. 3, the structural face material 42 of the panel body 16 is arranged between the horizontal cross member 18 (B) and the frame member 12(A) for joinery. As shown in FIG. 2, an unsteady adjuster 48 having the same thickness dimension as the structural face member 42 is arranged between the vertical crosspiece 18 (A) and the frame member 12(A) for joinery. Each of the crosspieces 18 is fixed to the joinery frame 12(A) by a first fastener 50 such as a screw penetrating the crosspiece 18 and screwed into the joinery frame 12(A). In addition to this, as shown in FIG. 7, a receiving crosspiece 52 for receiving the second heat insulating material 20 from below is provided on the outdoor side of the horizontal frame member such as the base, the body difference, the girder, and the girder. The crosspiece 52 for receiving is arranged and fixed to the horizontal frame member.

FIG. 8: is a figure which shows the 2nd heat insulating material 20 typically seen from the same viewpoint as FIG.
The second heat insulating material 20 is used to realize the outer heat insulating method. The second heat insulating material 20 is preferably made of a material having moisture resistance in addition to heat insulating properties. This material is, for example, a foam insulation material such as rigid urethane foam or a fiber insulation material such as glass wool. The second heat insulating material 20 has a rectangular shape when viewed from the expected direction Z. The 2nd heat insulating material 20 is arrange|positioned at the outer peripheral side of the crosspieces 18 for fittings, and covers several frame members 12 and the 1st heat insulating material 14 from the outdoor side (refer also FIGS. 2-4). Specifically, the second heat insulating material 20 covers the entire first heat insulating material 14 from the outdoor side, and also covers the four frames 12 surrounding the first heat insulating material 14 from the outdoor side. As the second heat insulating material 20 of the present embodiment, a number corresponding to the number of the first heat insulating material 14 is used. The second heat insulating material 20 is temporarily fixed by screwing the screws 54 penetrating the four corners into the structural surface material 42 (see FIG. 8 ), and is sandwiched between the frame member 12 and the furring strip 26. It is fixed (see FIGS. 2 and 3).

FIG. 9 is a diagram schematically showing the airtight tape 24 viewed from the same viewpoint as FIG.
The airtight tape 24 closes and seals the boundary between the second heat insulating material 20 and the fitting crosspiece 18 that are adjacent to each other in the vertical direction or the horizontal direction, or the boundary between the second heat insulating materials 20. The airtight tape 24 has airtightness and waterproofness, and is configured by combining, for example, an acrylic adhesive and polyethylene cloth. The airtight tape 24 is arranged so as to be continuous in an annular shape around the fitting opening 36. Although not shown, a moisture-permeable waterproof sheet is arranged on the outdoor side of the wall formed by the plurality of second heat insulating materials 20 and the plurality of fitting crosspieces 18 so as to cover these wall surfaces together with the airtight tape 24. It

As shown in FIG. 2, the furring strip 26 serves as a receiving material for attaching the exterior material 28 and has a role of fixing the second heat insulating material 20. The furring strips 26 of the present embodiment are vertical furring strips arranged along the vertical direction Y at intervals in the horizontal direction X. The plurality of furring edges 26 are applied to the second heat insulating material 20 and the receiving crosspiece 52 from the outdoor side, and some furring edges 26 are also applied to the fitting crosspiece 18 from the outdoor side. The plurality of furring strips 26 are fixed to the framework member 12 by a second fastener 56 such as a screw penetrating the plurality of furring strips 26 and screwed into the framework member 12. At this time, the furring strip 26 fixes the second heat insulating material 20 by sandwiching the second heat insulating material 20 with the frame member 12.

The exterior material 28 is fixed to the furring strip 26 by a third fastener (not shown) such as a screw in a state of being applied to the furring strips 26 from the outdoor side. The ventilation layer 58 is formed between the plurality of furring strips 26 between the second heat insulating material 20 and the exterior material 28, and moisture retention on the outdoor side surface of the second heat insulating material 20 is suppressed.

The fitting 22 includes a sash 60 and a frame 62. The sash 60 has upper and lower horizontal frames and left and right vertical frames, and is configured by framing these in a rectangular shape. The sash 60 is housed inside the plurality of fitting crosspieces 18, and a fixed or movable shoji (not shown) is housed inside the sash 60. The sash 60 has a fixed portion 60a that extends in the finding direction and is arranged on the outdoor side of the fitting crosspiece 18. The finding direction here means each of the vertical direction Y and the horizontal direction X when the vertical structure surface formed by the plurality of frame members 12 is viewed from the front. The sash 60 is fixed to the fitting crosspiece 18 by a fastener (not shown) such as a screw that penetrates the fixed portion 60 a of the sash 60 and is screwed into the fitting crosspiece 18. A sash seal member 64 is sandwiched between the fixed portion 60a of the sash 60 and the fitting crosspiece 18, and a gap therebetween is sealed. The sash seal material 64 is arranged around the fitting 22 so as to continue in an annular shape.

The frame 62 has upper and lower horizontal frames and left and right vertical frames. The frame 62 is arranged inside the first opening 38 and on the indoor side with respect to the sash 60, and is fixed to the sash 60 via a fixture 66 such as an angle. A gap 68 is formed between the frame 62 and the frame member 12(A) for joinery. The gap 68 functions as a play for absorbing dimensional errors of the frame member 12 and the fitting 22. This dimensional error includes a manufacturing error that occurs when manufacturing the frame member 12 and the like, and a construction error that occurs during construction. A plate-shaped spacer 70 is sandwiched in the gap 68 to enhance the degree of fixing of the frame 62. Since the size of the gap 68 varies depending on the construction site, the spacer 70 whose thickness is adjusted at the construction site is used.

The first airtight member 30 is for blocking the flow of air (flow in the direction Fa in FIG. 1) that is about to flow out from the indoor space 72 through between the frame member 12(A) for joinery and the crosspiece 18. is there. The air flow here refers to a flow that flows between the frame member 12(A) for fitting and the crosspiece 18 to the outside in the radial direction of the opening 36 for fitting. More specifically, the first airtight material 30 is provided in the indoor space 72 in a path from the indoor space 72 through the opening 36 for the fitting and the fitting 22 to the frame 12(A) for the fitting and the crosspiece 18. It is intended to block the flow of air that is about to flow out from. To achieve this purpose, the first airtight member 30 of the present embodiment is arranged between the frame member 12(A) for joinery and the crosspiece member 18. As a result, the flow of air that is about to flow from the indoor space 72 to the inter-wall space 74 between the heat insulating materials 14 and 20 through the space between the frame 12(A) for joinery and the crosspiece 18 (direction of FIG. 1). The flow of Fd) and the flow of air (flow in the direction Fe in FIG. 1) that flows out between the second heat insulating material 20 and the crosspiece 18 to the ventilation layer 58 on the outdoor side are blocked.

The first airtight material 30 is made of, for example, a foamed resin material having elasticity such as ethylene-propylene-diene resin, soft vinyl chloride resin, or urethane resin. The first airtight material 30 includes an outdoor-side first airtight material 30(A) which is interposed between the joining material 18 and the structural face material 42 or the unadjustable material 48 with elastic deformation, and the fitting. An indoor-side first airtight material 30 (B) is included between the framework member 12 (A) and the structural surface member 42 or the unadjustable material 48 with elastic deformation.

FIG. 10 is a diagram schematically showing the outdoor-side first airtight material 30(A).
The outdoor-side first airtight member 30(A) is provided so as to form a vertical seal portion 76 arranged along the vertical direction Y and a horizontal seal portion 78 arranged along the horizontal direction X. The vertical seal portion 76 and the horizontal seal portion 78 are formed by separate outdoor-side first airtight members 30(A). The vertical seal portions 76 are arranged on both sides of the fitting 22 in the horizontal direction X, and the horizontal seal portions 78 are arranged on both sides of the fitting 22 in the vertical direction Y. The vertical seal portion 76 and the horizontal seal portion 78 are provided so as to intersect each other by partially overlapping each other. As a result, the outdoor-side first airtight member 30(A) is arranged around the fitting 22 so as to be annularly continuous.

The vertical seal portions 76 are arranged in two rows in parallel between the joinery frame member 12 (A) and the joinery frame member 18, and the horizontal seal portions 78 are also provided in the joinery frame member 12 (A) and the joinery frame member 18. Two rows are arranged in parallel with each other. As shown in FIG. 2, the vertical seal portion 76 on the inner peripheral side is at a position offset to the inner peripheral side in the finding direction X with respect to the axial center C of the vertical crosspiece 18(A), and the vertical seal portion on the outer peripheral side. The seal portion 76 is at a position offset to the outer peripheral side of the axial direction C in the finding direction X. As shown in FIG. 3, the inner peripheral side lateral seal portion 78 is located at a position offset to the inner peripheral side in the find direction Y with respect to the axis C of the horizontal crosspiece 18 (B), and the outer peripheral side lateral seal portion 78 is offset. The portion 78 is located at a position offset to the outer peripheral side in the finding direction Y with respect to the axis C thereof. That is, the outdoor-side first airtight material 30(A) is arranged in parallel so as to pass through the positions offset to both sides in the radial direction of the fitting 22 with respect to the axis C of the crosspiece 18.

The indoor first airtight member 30(B) is also provided so as to form a vertical seal portion 80 arranged along the vertical direction Y and a horizontal seal portion 82 arranged along the horizontal direction X. The indoor-side first airtight material 30(B) is also arranged so as to be annularly continuous around the fitting 22. In the present embodiment, the indoor first airtight members 30(B) provided above and below the fitting 22 also serve as the airtight member 45 of the panel body 16 (see FIG. 3 ).

As shown in FIG. 10, the second airtight member 32 seals between the vertical cross member 18 (A) and the horizontal cross member 18 (B). Specifically, the second airtight member 32 is interposed between the end surface of the vertical rail member 18(A) in the material axis direction and the outer peripheral surface of the horizontal rail member 18(B) with elastic deformation, and the space between them is provided. Seal it. The second airtight member 32 is interposed between one end face of the vertical rail member 18 (A) and the horizontal rail member 18 (B) and the outer peripheral surface of the other. The second airtight member 32 is for blocking the flow of air (flow of arrow Fb) in the finding direction X between the vertical crosspieces 18 (A) and the horizontal crosspieces 18 (B). The second airtight members 32 extend linearly in the prospective direction Z between the vertical rail members 18 (A) and the horizontal rail members 18 (B), and are arranged in two rows in parallel at intervals in the sighting direction X. ing.

The function and effect of the heat insulating structure 10 will be described.
Since the heat insulating structure 10 of the present embodiment includes the first airtight material 30, as described above, the frame member 12(A) for joinery and the crosspiece that can become an air leak point when the filling heat insulating method and the outer heat insulating method are used in combination. The flow of air passing between the material 18 and the material 18 can be blocked. Therefore, it is possible to effectively ensure the airtightness around the fitting opening 36.

Further, suppose that air flows out from the indoor space 72 through the space between the frame member 12(A) for joinery and the crosspiece 18. In this case, a heat transfer path bypassing the first heat insulating material 14 is generated between the indoor space 72 and the inter-wall space 74 between the heat insulating materials 14 and 20, and the heat insulating performance of the first heat insulating material 14 is improved. It becomes difficult to exert it effectively. In this respect, according to the present embodiment, a heat transfer path that bypasses the first heat insulating material 14 is less likely to occur between the inter-wall space 74 or the ventilation layer 58 and the indoor space 72, and the heat insulating performance of the first heat insulating material 14 is reduced. The heat insulating structure 10 as a whole can effectively obtain high heat insulating properties.

In addition, as a result of examination by the inventor of the present invention, it is assumed that an air leak point is provided between the frame member 12(A) for joinery and the crosspiece member 18, so that the outdoor side surface portion of the first heat insulating material 14 (Fig. We obtained new knowledge that dew condensation is likely to occur on the indoor side surface portion of the second heat insulating material 20 (see the range Sb of 1). This is because air containing moisture flows out from the indoor space 72 to the inter-wall space 74 through the air leak portion, and the moisture stays on the outdoor side surface portion of the first heat insulating material 14 and the indoor side surface portion of the second heat insulating material 20. It is thought to be due to that. In this respect, according to the present embodiment, the flow of the air passing between the frame member 12(A) for joinery and the crosspiece member 18, which may be the air leak location, is blocked by the first airtight member 30, so that It is possible to effectively prevent dew condensation of the heat insulating materials 14 and 20 at the portion facing the inter-wall space 74.

The first airtight member 30 of the present embodiment is arranged between the frame member 12(A) for joinery and the crosspiece 18 for joinery, and therefore has the following advantages. As a location where the first airtight member 30 is arranged, a gap 68 between the frame 62 of the fitting 22 and the frame member 12(A) for fitting is also conceivable. However, since the gap 68 functions as a play for absorbing the dimensional error of the frame member 12 and the fitting 22 as described above, the dimensional variation easily occurs due to the influence of the dimensional error. Therefore, if the gap 68 is sealed by the first airtight material 30, it becomes difficult to secure stable airtightness due to the influence of the dimensional variation. In this regard, according to the present embodiment, the first airtight material 30 is arranged at a position where the dimensional variation is unlikely to occur, such as between the frame material 12(A) for joinery and the crosspiece 18 for joinery, and therefore stable. Thus, the airtightness of the first airtight material 30 can be secured.

Since the first airtight member 30 of the present embodiment is arranged so as to be continuous in an annular shape around the fitting 22, the space 74 between the walls between the heat insulating members 14 and 20, or between the ventilation layer 58 and the indoor space 72. The first airtight material 30 can effectively block the air flow in the above. Therefore, it is possible to more effectively obtain high heat insulating properties as the entire heat insulating structure 10, and it is possible to more effectively prevent dew condensation of the heat insulating materials 14 and 20.

Further, the heat insulating structure 10 of the present embodiment includes the second airtight material 32 that seals between the vertical crosspieces 18(A) and the horizontal crosspieces 18(B). Therefore, as shown in FIG. 10, between the vertical crosspiece 18(A) and the horizontal crosspiece 18(B) from the inner corner portion 18a formed by the vertical crosspiece 18(A) and the horizontal crosspiece 18(B). The second airtight material 32 can suppress the inflow of air (flow of arrow Fb) from the indoor space 72 toward the inter-wall space 74 and the ventilation layer 58 in the finding direction. Therefore, it is possible to more effectively obtain high heat insulating properties as the entire heat insulating structure 10, and it is possible to more effectively prevent dew condensation of the heat insulating materials 14 and 20.

The first heat insulating material 14 is a part of the panel body 16 having the structural surface material 42 and the seal piece 44. Therefore, in assembling these to the plurality of frame members 12, it is possible to reduce the construction man-hours as compared with handling them individually, and to obtain good workability. Therefore, there is an advantage that good workability can be obtained while ensuring the heat insulating property of the first heat insulating material 14, the high yield strength of the structural surface material 42, and the airtightness of the seal piece 44. Further, since the panel body 16 also has the airtight material 45, there is an effect that the airtightness by the airtight material 45 can be secured while obtaining such advantages.

The heat insulating structure 10 of this embodiment is also characterized by the following points.
As shown in FIG. 4, the second heat insulating material 20 on the uppermost floor side is arranged below the roof set 84 of the building. The upper end surface of the second heat insulating material 20 is formed to have a slope equal to the slope formed by the lower surface of the roof assembly 84, and is arranged so as to abut against the lower surface of the roof assembly 84. As a result, the gap between the roof set 84 and the second heat insulating material 20 can be made narrower than in the case where the upper end surface of the second heat insulating material 20 is horizontal, and the heat insulating structure 10 as a whole can easily obtain high heat insulating properties.

(Second embodiment)
FIG. 11 is a plan sectional view showing a part of an outer wall portion of a building in which the heat insulating structure 10 of the second embodiment is used, and FIG. 12 is a side sectional view thereof.
The heat insulating structure 10 of the present embodiment is different from the first embodiment in the configuration of the frame member 12 and the first heat insulating material 14. Specifically, the frame member 12 and the first heat insulating material 14 of the present embodiment form a part of the panel body 86 used in the frame wall construction method. The panel body 86 includes a frame body 88, the structural face material 42, and the first heat insulating material 14. The frame body 88 has upper and lower horizontal frames 90 and left and right vertical frames 92 as the frame member 12, and is configured by framing these in a rectangular shape. The second opening 40 is formed inside the framework 88 by the horizontal frame 90 and the vertical frame 92, and the inside of the second opening 40 is filled with the first heat insulating material 14. The structural face material 42 includes an outdoor side surface material 42 (A) attached to the outdoor side surface of the frame body 88 and an indoor side surface material 42 (B) attached to the indoor side surface of the frame body 88. The first opening 38, which is a part of the opening 36 for fittings described above, is formed by the horizontal frame 90 and the vertical frame 92 (framework material 12(A) for fitting) of the four separate frame assemblies 88. Thus, the heat insulating structure 10 of the present invention may be used in any of the frame construction method and the frame wall construction method.

The present invention has been described above based on the embodiments, but the embodiments merely show the principle and application of the present invention. Further, in the embodiment, many modifications and arrangements can be changed without departing from the idea of the present invention defined in the claims.

The example in which the first airtight member 30 is arranged between the frame member 12(A) for joinery and the crosspiece 18 for joinery has been described. The present invention is not limited to this, and the first airtight member 30 may be arranged at a position that can block the flow of air that is about to flow out of the indoor space 72 through between the frame member 12(A) for joinery and the crosspiece member 18. .. To achieve this, the first airtight material 30 may be arranged, for example, between the frame 62 of the fitting 22 and the fitting frame 12(A). At this time, the first airtight member 30 may be arranged so as to close the space between the frame member 12(A) for joinery and the crosspiece member 18 from the inner peripheral side in the mounting direction. That is, if the first airtight member 30 is arranged between the frame member 12(A) for joinery and the crosspiece 18 and between the frame member 12(A) for joinery and the joiner 22 at least. Good.

Moreover, although the 1st airtight material 30 demonstrated the example arrange|positioned so that it may be annularly continuous around the fitting 22, it is not restricted to this. For example, the first airtight material 30 may be arranged so as to form only one of the vertical seal portion 76 and the horizontal seal portion 78 described above. Moreover, although the example in which the outdoor side first airtight material 30(A) and the indoor side first airtight material 30(B) are included in the first airtight material 30 has been described, it is possible to include only one of them instead of both of them. Good.

Moreover, although the 1st heat insulating material 14 demonstrated the example which is a part of the panel body 16 which has the structural surface material 42, the sealing piece 44, and the airtight material 45, it is not restricted to this, The structural surface material is not limited to this. It may be configured separately from 42 and the like. Further, the seal piece 44 may be made of a foamed resin material or the like having elasticity similar to the airtight material 45 and the like. Further, in the embodiment, the heat insulating structure 10 having the airtight material 45 has been described as an example, but the airtight material 45 may be omitted.

The furring strip 26 has been described by taking the vertical furring strip arranged along the vertical direction Y as an example, but the furring strip 26 may be a horizontal furring strip arranged along the horizontal direction X.

Generalization of the invention embodied by the above-described embodiments and modifications leads to the following technical idea. Hereinafter, description will be given using an aspect described in the problems to be solved by the invention.

In the heat insulating structure for a building according to the second aspect, in the first aspect, the first airtight material may be arranged between the frame member for joinery and the crosspiece.
According to this aspect, since the first airtight material is arranged at a position where the dimensional variation is unlikely to occur, such as between the frame material for joinery and the crosspiece for joinery, the airtightness of the first airtight material is stably maintained. Can be secured.

In the heat insulating structure for a building according to the third aspect, in the first aspect or the second aspect, the first airtight material may be arranged so as to be annularly continuous around the fitting.
According to this aspect, it is possible to effectively block the flow of air between the space between the walls of the heat insulating materials and the indoor space by the first airtight material.

In the heat insulating structure for a building according to a fourth aspect, in any one of the first aspect to the third aspect, the plurality of bar members include a vertical bar member and a horizontal bar member, and the vertical bar member and the horizontal bar member are included. You may provide the 2nd airtight material which seals between and.
According to this aspect, the space between the vertical crosspiece and the horizontal crosspiece is passed from the inner corner formed by the vertical crosspiece and the horizontal crosspiece in the finding direction, and the space between the walls between the heat insulating materials is directed from the indoor space. The inflow of air can be suppressed by the second airtight material.

The heat insulating structure for a building according to a fifth aspect is the structure according to any one of the first to fourth aspects, wherein the first heat insulating material is a structural surface material attached to an outdoor side surface of the first heat insulating material, and the first heat insulating material. It may be a part of a panel body having a seal piece interposed between a member and the frame member.
According to this aspect, when assembling the first heat insulating material, the structural surface material, and the seal piece to the plurality of frame members, the number of construction steps can be reduced and good workability can be obtained as compared with the case where these are individually handled.

DESCRIPTION OF SYMBOLS 10... Insulation structure, 12... Frame material, 12(A)... Frame material for fittings, 14... 1st heat insulating material, 16... Panel body, 18... Cross member for fittings, 18(A)... Vertical cross member, 18( B)... Horizontal cross member, 20... Second heat insulating material, 22... Joining tool, 30... First airtight material, 32... Second airtight material, 36... Opening part for fitting, 38... First opening part, 40... Second part Opening part, 42... Structural face material, 44... Sealing piece, 72... Indoor space.

Claims (4)

A plurality of frame members that are vertically and laterally bridged so as to form a plurality of second openings and a first opening that is a part of the opening for joinery;
A first heat insulating material housed inside each of the plurality of second openings;
A plurality of joinery crosspieces arranged on the outdoor side of the plurality of joinery frame members forming the first opening, and a part of the joinery opening portion being formed inside.
A second heat insulating material which is arranged on the outer peripheral side of the plurality of crosspieces and covers the plurality of frame members and the first heat insulating material from the outdoor side;
A first airtight member for blocking the flow of air that is about to flow out of the indoor space through the frame member for joinery and the crosspiece member ,
Before SL plurality of crosspieces contains the longitudinal crosspieces and transverse crosspieces,
Heat insulating structure of the building, characterized in that to obtain Bei the second hermetic material for sealing between said transverse crosspieces and the longitudinal crosspieces. The heat insulating structure for a building according to claim 1, wherein the first airtight member is arranged between the frame member for joinery and the crosspiece. The heat insulating structure for a building according to claim 1, wherein the first airtight material is arranged so as to be annularly continuous around the fitting. The first heat insulating material is one of a panel body having a structural face material attached to an outdoor side surface of the first heat insulating material, and a seal piece interposed between the first heat insulating material and the frame member. The heat insulating structure for a building according to any one of claims 1 to 3 , which is a part.

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