Wooden building

Abstract

To provide a wooden building high in energy efficient.SOLUTION: A wooden building includes a lateral beam member, a ceiling plate, and a plurality of columns, wherein the ceiling plate is arranged on an upper surface of the lateral beam member, there is a gap between the ceiling plate and an outermost peripheral lateral beam member, airtight resin sheets cover an upper part of the ceiling plate and continuously cover inner surfaces of the plurality of columns, and the resin sheet covering the upper surface of the ceiling plate and the resin sheet covering the inner side surfaces of the plurality of the columns continuously are continued through the gap.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to wooden buildings. [Background technology]

[0002] In recent years, energy conservation measures for wooden buildings, including houses, have been considered. For example, the "Guidelines for Design, Construction, and Maintenance of Houses Concerning Rationalization of Energy Use" (2006 edition) (Ministry of Land, Infrastructure, Transport and Tourism Notification No. 378 of 2006) (hereinafter referred to as the "2006 Guidelines"), which was disclosed in 2006, provides guidelines for the design, construction, and maintenance of houses in accordance with the provisions of the Criteria for Building Owners and Owners of Specified Buildings Concerning Rationalization of Energy Use in Houses (Ministry of Economy, Trade and Industry and Ministry of Land, Infrastructure, Transport and Tourism Notification No. 3 of 2006). The 2006 Guidelines provide standards for the construction of airtight layers, for example, standards for the construction of airtight sheets.

[0003] Airtight sheets are applied to wooden buildings for the purposes of, for example, ensuring the insulation of the house, ensuring proper ventilation, and ensuring the durability of the structural frame. Patent Document 1 discloses a wooden building equipped with such an airtight sheet. In Patent Document 1, moisture-proof sheets having airtight properties are provided on the walls and ceiling of the wooden building. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2001-59285 A Summary of the Invention [Problem to be solved by the invention]

[0005] The 2006 Guidelines set out standards for installing such airtight sheets. For example, the Guidelines stipulate that "sheet-like airtight materials should overlap by 30 mm or more where there is a base material, and that this area should be sandwiched between materials such as plywood, dried wood, or gypsum board." However, installing moisture-proof sheets on wooden buildings while adhering to the above standards is difficult.

[0006] For example, when installing moisture-proof sheets on a ceiling and a wall and overlapping these moisture-proof sheets, in order to satisfy the above-mentioned standard, the layout must be adjusted so that the moisture-proof sheets on the ceiling and the moisture-proof sheets on the walls overlap by 30 mm or more. However, wooden buildings such as houses usually have many horizontal members such as beams and columns, so it requires skilled hands to adjust the layout while considering the positions of such horizontal members and columns. For example, as shown in FIG. 16, when a partition column exists in an indoor space, the moisture-proof sheet must be cut out to avoid the partition column. Since such layout adjustment requires a lot of time, a large number of man-hours are required for the construction of a wooden building, which leads to an increase in construction costs. Therefore, a technology that can solve such problems has been desired. [Means for solving the problem]

[0007] As a result of extensive research, the inventors discovered that the above problems could be solved by giving wooden buildings a specific structure, and thus arrived at the present invention. That is, the present invention provides: [1] A wooden building including columns, beams and ceiling panels, The ceiling plate is provided on the upper surface of the cross member, There is a gap between the ceiling panel and the outermost horizontal member, a resin sheet having airtightness covering an upper surface of the ceiling board and continuously covering the plurality of columns on their inner surfaces, the resin sheet covering the upper surface of the ceiling board and the resin sheet continuously covering the plurality of columns on their inner surfaces being continuous with each other via the gap; [2] The wooden building according to [1], wherein the cross member is an additional cross member provided under the rafter. [3] The wooden building according to [1] or [2], wherein the gap is 20 to 30 mm. [4] The wooden building according to any one of [1] to [3], in which a wall material is attached to the inner surface of the pillar via the resin sheet, and the gap is closed by the upper side of the wall material; [5] The wooden building according to any one of [1] to [4], in which the wall material is a board made of a material having a heat insulating effect; [6] The wooden building according to any one of [1] to [5], wherein a heat insulating material is provided on the ceiling board covered with the resin sheet; and [7] A wooden building of two or more stories, including beams, floorboards and multiple columns, The floor plate is provided on the upper surface of the cross member, There is a gap between the floorboards of floors other than the first floor and the outermost cross members. a wooden building having an airtight resin sheet continuously covering the plurality of columns on their inner surfaces, the resin sheet covering the plurality of columns on one floor on their inner surfaces and the resin sheet continuously covering the plurality of columns on another floor on their inner surfaces being continuous with each other through the gap; Regarding. Effect of the Invention

[0008] In the wooden building of the present invention, the resin sheet applied to the ceiling and the resin sheet applied to the inner surface of the column are continuous. In addition, in the wooden building of the present invention, the resin sheet covering the inner surface of the column of the first floor is continuous with the resin sheet covering the inner surface of the column of the other floor. Since there are no joints between these resin sheets, or even if there are joints, they can be kept to a minimum, the wooden building of the present invention has very high airtightness. In addition, when constructing a wooden building, the time required to adjust the layout of the resin sheets can be significantly reduced and construction can be completed in one go, so the number of steps required to construct a wooden building can be significantly reduced. [Brief description of the drawings]

[0009] [Figure 1] FIG. 15 is a schematic cross-sectional view of a two-story wooden building (wooden house) A according to embodiment 1, which is one form of the present invention, in a state before a resin sheet is applied (cross-sectional view taken along the AB direction in FIG. 14). [Diagram 2] FIG. 15 is a schematic cross-sectional view of a two-story wooden building (wooden house) A according to embodiment 1, which is one form of the present invention, in a state before a resin sheet is applied (cross-sectional view taken along CD in FIG. 14). [Diagram 3] FIG. 15 is a schematic cross-sectional view of a two-story wooden building (wooden house) A according to embodiment 1, which is one form of the present invention, after a resin sheet has been applied (cross-sectional view taken along the AB direction in FIG. 14). [Figure 4] FIG. 15 is a schematic cross-sectional view of a two-story wooden building (wooden house) A according to embodiment 1, which is one form of the present invention, after a resin sheet has been applied (cross-sectional view taken along CD in FIG. 14). [Diagram 5] 13(a) is a drawing showing one method of cutting a resin sheet, and (b) is a drawing showing one method of avoiding a rafter Z by using the cut resin sheet. [Figure 6] This is a schematic drawing of a resin sheet covering the inner surface of a ceiling panel and a pillar through a gap, showing (a) a resin sheet repaired with tape and (b) a resin sheet pasted together in the middle. [Figure 7] FIG. 15 is a schematic cross-sectional view of a two-story wooden building (wooden house) B according to embodiment 2, which is one form of the present invention, in a state before a resin sheet is applied (cross-sectional view taken along the AB direction in FIG. 14). [Figure 8] FIG. 15 is a schematic cross-sectional view of a two-story wooden building (wooden house) B according to embodiment 2, which is one form of the present invention, in a state before a resin sheet is applied (cross-sectional view taken along CD in FIG. 14). [Figure 9] FIG. 15 is a schematic cross-sectional view of a two-story wooden building (wooden house) B according to embodiment 2, which is one form of the present invention, after a resin sheet has been applied (cross-sectional view taken along the AB direction in FIG. 14). [Figure 10] 1 is a diagram showing a schematic diagram of a wall material covering a resin sheet that covers the inner surface of a pillar. [Figure 11] This is a drawing showing the insulation material (a) stacked horizontally on top of a ceiling board, and (b) lined up vertically and filled in. [Figure 12] 14 shows a two-story wooden building (wooden house) C according to a fifth embodiment of the present invention (a cross-sectional view taken along the line AB in FIG. 14). [Figure 13] FIG. 15 is a schematic cross-sectional view of a two-story wooden building (wooden house) C according to embodiment 5, which is one form of the present invention, in a state before a resin sheet is applied (cross-sectional view taken along the EF direction in FIG. 14). [Figure 14] This is a drawing showing the exterior of a typical wooden building (wooden house). [Figure 15] FIG. 15 is a schematic cross-sectional view showing a conventional wooden building (wooden house) (cross-sectional view taken along line AB in FIG. 14). [Figure 16] 1 is a photograph showing one aspect of installing a moisture-proof sheet in a conventional wooden building (wooden house) having partition pillars. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The present invention will be described based on specific embodiments with reference to the drawings. Note that the drawings and the following description are merely for explaining one embodiment of the present invention, and do not limit the scope of the present invention in any way. In addition, the terms "up and down", "front and back", and "left and right" in the text refer to the directions shown in each drawing.

[0011] Before describing the embodiments of the present invention, the structure of a conventional wooden building (wooden house) will be described based on a specific example. FIG. 14 is a drawing showing the appearance of a typical wooden building. FIG. 15 is a schematic drawing showing a conventional wooden building cut along the AB cross section in FIG. 14. The conventional wooden house is provided with foundations 101, 101, and bases 102, 102 installed on the foundations 101, 101. A plurality of joists (not shown) are hung vertically between the bases 102, 102, and joists (not shown) are hung horizontally above the joists, 102, and a floorboard 102' is provided on the joists. A plurality of pillars 103, 103, ... are provided on the bases 102, 102. Girths 104, 104 are suspended across the upper ends of the columns 103, 103,..., as horizontal members extending in parallel. A plurality of floor beams (not shown) are suspended vertically between the girths 104, 104, and a plurality of joists (not shown) are suspended horizontally above the floor beams, with floorboards 104' provided on the joists. Similarly, columns 103, 103,... are erected on the girths 104, 104 in correspondence with the columns 103, 103,... on the foundations 102, 102. Roof beams 105, 105 are suspended across the upper ends of the columns 103, 103,... on the girths 104, 104, as horizontal members extending in parallel.

[0012] A roof 107 is hung on top of the rafters 105, 105 via a truss (not shown). A ceiling board 106 is attached to the underside of a cross member such as a rafter (not shown) that is connected to a hanging beam (not shown) that extends vertically downward from the rafters (not shown) that are connected to the rafters 105, 105. The wooden building comprises the above-mentioned ceiling board 106, a floor on the first floor (the lowest level), and exterior walls with openings such as windows, entrances, and ventilation openings, and rooms R, R, etc. are provided in the space formed by these.

[0013] 1. Embodiment 1 The wooden building of the present invention is a wooden building including columns, cross members and ceiling panels, The ceiling plate is provided on the upper surface of the cross member, There is a gap between the ceiling panel and the outermost horizontal member, The wooden building has an airtight resin sheet (hereinafter simply referred to as "resin sheet") that covers the upper surface of the ceiling board and continuously covers the multiple columns on their inner surfaces, and the resin sheet that covers the upper surface of the ceiling board and the resin sheet that continuously covers the multiple columns on their inner surfaces are continuous with each other via the gap. Note that the wooden building in this invention means a building whose main frame is made of wood. An example of such a building is a wooden house.

[0014] FIG. 1 is a schematic cross-sectional view of a two-story wooden building (wooden house) A according to the first embodiment before the resin sheet is applied (cross-sectional view in the AB direction in FIG. 14). It goes without saying that the wooden building in the present invention is not limited to a two-story building, but may be a one-story building (for example, a so-called one-story building) or a building having three or more floors. The wooden building A has foundations 1, 1 and bases 2, 2 installed on the foundations 1, 1. A plurality of joists (not shown) are hung vertically between the bases 2, 2, and a plurality of joists (not shown) are hung horizontally above the joists, and a floorboard 21 is provided on the joists. A plurality of columns 3, 3, ... are provided on the bases 2, 2. Girths 4, 4 are hung on the upper ends of the columns 3, 3, ... as cross members extending in parallel. A plurality of floor beams (not shown) are suspended vertically between the girths 4, 4, and a plurality of horizontal members 42, 42, . . . are suspended horizontally between the girths 4, 4, and a floorboard 41 is provided on the horizontal members 42, 42, . . . On the girths 4, 4, pillars 3, 3, . . . are erected in a similar manner to the pillars 3, 3, . . . on the foundations 2, 2. A rafter X5, 5 is suspended from the upper ends of the pillars 3, 3, . . . on the girths 4, 4 as a horizontal member extending in parallel. A roof 7 is placed on the rafter X5, 5 via a rafter truss (not shown). The wooden building A is provided with a ceiling board 6, which will be described later, a floor of the first floor, which is the lowest floor, and an exterior wall with openings such as windows, entrances, and ventilation openings, and rooms R, R, . . . are provided in the space formed by these.

[0015] FIG. 2 is a cross-sectional view of the wooden building A of the first embodiment in the state before the resin sheet 10 is hung in the CD direction in FIG. 14. The rafters X5, 5 are connected to the rafters Y8, 8 as cross members. A plurality of rafters Z9, 9, . . . are hung between the rafters Y8, 8 in a direction parallel to the rafters X5, 5. A ceiling board 6 is provided on the upper surface of the rafters Z9, 9, . . . A gap G is provided between the ceiling board 6 and the rafters X5, 5 and the rafters Y8, 8, which are the outermost cross members. Here, the "outermost cross member" in the present invention means the cross member located at the outermost position when the wooden building is viewed from the planar direction, such as the rafters X5 and Y8 in FIG. 2. The width L1 of the gap G is not particularly limited, provided that it is wide enough to pass the resin sheet 10 described later. A specific example of the width is, for example, 20 to 30 mm, preferably 20 to 25 mm. By setting the width of the gap G within the above range, when the resin sheet 10 is applied as described later, the resin sheet 10 can be easily pushed through the gap by a finger, and the gap G can be more easily blocked by the upper end surface of the wall material attached to the inner surface of the pillar described later. The width of the gap G may be the same width in the front, back, left and right, or may be different widths. The material of the ceiling board 6 may be any material that has been used as a ceiling board in the past. The thickness of the ceiling board 6 is not particularly limited. For example, by setting the thickness of the ceiling board 6 to a thickness of 20 to 35 mm, a worker can stand on the ceiling board 6 to apply the resin sheet 10, thereby further improving the work efficiency. In addition, as described in the fourth embodiment described later, when an insulating material is applied on the ceiling board 6, by setting the thickness of the ceiling board to the above numerical value, the ceiling board can withstand the mass of the insulating material applied on the ceiling board 6, so that more insulating material can be applied.

[0016] FIG. 3 is a schematic cross-sectional view (cross-sectional view AB in FIG. 14) showing the state of a two-story wooden building (wooden house) A according to the first embodiment after the resin sheet 10 is applied. The resin sheet 10 can be used by changing the area appropriately depending on the size of the entire wooden building A. The material and thickness of the resin sheet 10 are not particularly limited, provided that the resin sheet 10 has airtightness to block moisture. For example, a polyethylene film having a thickness of about 0.05 to 0.2 mm, an aluminum-deposited polyethylene film, or a film in which an aluminum foil is backed with craft paper can be used as the resin sheet 10. In FIG. 3, the resin sheet 10 covers only the inner surfaces of the columns 3, 3, ... in the second floor part, but the resin sheet 10 may be continuously covered not only in the second floor part but also in the inner surfaces of the columns 3, 3, ... in the first floor part by providing a gap between the floor board 41 and the outermost horizontal member as described later.

[0017] The resin sheet 10 covers the upper surface of the ceiling board 6 and continuously covers the inner surfaces of the columns 3, 3, ..., and the resin sheet 10 covering the ceiling board 6 and the resin sheet 10 covering the columns 3, 3, ... are continuous through the gap G. Note that "the inner surface of the column" means, for example, the surface facing the inside of the room in the case of a rectangular column. Also, "continuously covering the columns with its inner surface" means that the inner surfaces of the columns 3, 3, ... are continuously covered without gaps (even if there are gaps, they are stuck together) (i.e., the resin sheet 10 is stretched between one column 3 and another column 3 located next to it). The resin sheet 10 may be a single large resin sheet. Also, if it is difficult to cover the entire inner surfaces of the ceiling board 6 and the columns 3, 3, ... with only one resin sheet, a resin sheet 10 made by sticking together multiple resin sheets may be used. In the wooden building A of the present invention, a plurality of resin sheets can be bonded together in advance to form the resin sheet 10 before the resin sheet 10 is applied to the wooden building A, which greatly reduces the time and effort required to adjust the bonding position while adjusting the layout at the construction site.

[0018] FIG. 4 is a schematic diagram showing the state of the two-story wooden building (wooden house) A according to the first embodiment after the resin sheet 10 is applied (cross-sectional view of CD in FIG. 14). The resin sheet 10 entirely covers the upper surface of the ceiling board 6, and continues to the inner surfaces of the columns 3, 3, . . . through the gap G. In addition, the gap G is blocked by the rafters Z9, 9, . . . supporting the ceiling board 6 in some places. In such a place, as shown in FIG. 5(a), a cut C is made in a part of the resin sheet 10, and a triangular cut, for example, is made in the part of the resin sheet 10 that contacts the rafter Z9, so that the resin sheet 10 can continuously cover the upper surface of the ceiling board 6 and the inner surfaces of the columns 3, 3, . . . while avoiding the rafters Z9, as shown in FIG. 5(b). The resin sheet 10 does not necessarily need to be fixed to the ceiling board 6, but when it is fixed, it can be fixed by any method that has been used to fix a resin sheet to a ceiling. For example, it may be fixed by a tacker.

[0019] FIG. 6 is a diagram for explaining the state in which the resin sheet 10 is attached to the inner surface of the columns 3, 3, . . . through the gap G from the ceiling board 6. The resin sheet 10 covering the upper surface of the ceiling board 6 passes through the gap G as described above and is attached to the inner surface of the columns 3, 3, . . . Here, as described above, the portions where the cuts are made to avoid the rafters Z9, 9, . . . may be attached with tape 11 or the like as shown in FIG. 6(a). When the resin sheet 10 is fixed to the columns 3, 3, . . ., it can be fixed by any conventional method for fixing a resin sheet to a column. For example, it may be fixed by a tacker. In addition, if there is an opening such as a window on the wall, the resin sheet 10 may be cut out to match the shape of the opening. In the wooden building A of the present invention, the resin sheet 10 continuously covers the inner surface of the columns 3, 3, . . . Therefore, since the resin sheet 10 can be installed without worrying about the layout of the columns during installation, it is possible to significantly reduce the number of steps. If the vertical width of the roof beam Y8 is greater than the vertical width of the roof beam Z9 as shown in Figure 6(b), the resin sheet 10 with cuts made in it can be cut partway (for example, in the length direction (horizontal direction) of the roof beam Y8 at the location of the roof beam Y8) to avoid the roof beams Z9, 9, ..., and an uncut resin sheet 10 can be attached to the cut-out area. In this way, the effort of repairing the cuts made in the resin sheet 10 can be eliminated.

[0020] The wooden building A of the present invention can cover the entire inside of the building continuously with the resin sheet 10. Therefore, the inside of the wooden building A of the present invention is very airtight, and the efficiency of temperature control by the air conditioning equipment is very high.

[0021] After the resin sheet 10 has been applied, decorative material or the like may be applied to the undersides of the roof beams Z9, 9, ... to cover the roof beams Z9, 9, ... so that they cannot be seen from inside the room.

[0022] 2. Embodiment 2 In addition, as another embodiment of the wooden building of the present invention, the cross member may be an additional cross member provided under the rafter. Fig. 7 is a schematic cross-sectional view of a two-story wooden building (wooden house) B according to this embodiment before the resin sheet 10 is applied (cross-sectional view in the AB direction in Fig. 14). The wooden building B has foundations 1, 1 and sills 2, 2 installed on the foundations 1, 1. A plurality of joists (not shown) are hung vertically between the sills 2, 2, and a plurality of joists (not shown) are hung horizontally above the joists, and a floorboard 21 is provided on the joists. A plurality of columns 3, 3, ... are provided on the sills 2, 2. Girths 4, 4 are hung on the upper ends of the columns 3, 3, ... as cross members extending in parallel. A plurality of floor beams (not shown) are suspended vertically between the girths 4, 4, and a plurality of cross members 42, 42, ... are suspended horizontally between these floor beams and the girths 4, 4, and a floor plate 41 is provided on the cross members 42, 42, .... Similarly, columns 3, 3, ... are erected on the girths 4, 4 in correspondence with the columns 3, 3, ... on the foundations 2, 2.

[0023] Additional girders 12, 12 are suspended across the upper ends of the columns 3, 3, ... on the girder spans 4, 4 as horizontal members extending in parallel. Columns 3, 3, ... are erected above the additional girders 12, 12 in correspondence with the columns 3, 3, ... on the girder spans 4, 4. Tall beams X5, 5 are suspended across the upper ends of the columns 3, 3, ... as horizontal members extending in parallel. A roof 7 is hung on top of the rafters X5, 5 via a truss (not shown). Wooden building B differs from wooden building A in FIG. 1 in that an additional horizontal member is provided between the girder spans 4, 4 and the rafters X5, 5 (in other words, below the rafters X5, 5). The wooden building B comprises a ceiling panel 6 described below, a floor on the first floor (the lowest level), and exterior walls with openings such as windows, entrances, and ventilation openings, and rooms R, R, etc. are provided in the space formed by these.

[0024] FIG. 8 is a cross-sectional view of the wooden building B of the second embodiment in the CD direction in FIG. 14 before the resin sheet 10 is applied. Additional girders 13, 13 are connected to the additional girders 12, 12 as cross members. A plurality of additional small beams 14, 14, . . . are hung between the additional girders 13, 13. A ceiling board 6 is provided on the upper surface of the additional small beams 14, 14, . . . A gap G is provided between the ceiling board 6 and the additional girders 12, 12 and the additional girders 13, 13, which are the outermost cross members. Here, the "outermost cross member" in the present invention means the cross member located at the outermost position when the wooden building is viewed from the planar direction, such as the additional girders 12 and the additional girders 13 in FIG. 8. The width L1 of the gap G is the same as that of the first embodiment.

[0025] In the wooden building B of embodiment 3, the resin sheet 10 continuously covers the upper side of the ceiling board 6 and the inner surfaces of the columns 3, 3, ... through the gap G. Fig. 9 is a schematic cross-sectional view of the two-story wooden building (wooden house) B according to embodiment 2 after the resin sheet 10 has been installed (cross-sectional view taken along line AB in Fig. 14). The types of resin sheet 10 that can be used, the method for covering the ceiling board 6 and the inner surfaces of the columns 3, 3, ... and the fixing method are the same as those in embodiment 1.

[0026] In the wooden building B of the second embodiment, a relatively large space S can be secured above the ceiling board 6. Therefore, such a space S can be used as a storage space or the like, or it can be used as a space for filling with a heat insulating material as described later.

[0027] 3. Embodiment 3 Furthermore, in the wooden building of the present invention, the resin sheet 10 is interposed between the pillars 3, 3, . A wall material 15 is attached to the inner surface of the gap G. If the gap G is left open, the room temperature will be raised by the air conditioning equipment. When the temperature is raised or lowered, heat escapes or is supplied through the gap G, improving the efficiency of air conditioning. As described above, by closing the gap G with the wall material 15, FIG. 10 shows that the gap G is closed by the upper end surface of the wall material 15. 10 is a diagram for explaining the state in which the ceiling board 6 and the outermost horizontal member (the rafter X in FIG. 10) are 5) is the upper end face of the wall material 15 attached to the surface of the pillars 3, 3, . . . In FIG. 10, the width L2 of the wall member 15 is smaller than the width L1 of the gap G. The gap G is closed by the upper end surface of the wall material 15. For example, the thickness L2 of the wall material 15 and the width L1 of the gap G are set to be approximately the same, and the upper side of the wall material 15 is It may also be blocked by inserting it into G.

[0028] The wall material 15 can be any building material that has been used for the interior of wooden buildings. The wall material 15 may be a plate made of a material having a heat insulating effect. The method of fixing the member 15 to the columns 3, 3, etc. can be any conventional fixing method without any particular restrictions. If no treatment is applied to the pillars 3, 3, ..., the outdoor temperature will drop and the When the outside temperature rises, the cold air inside the building flows through the pillars into the wooden building. On the other hand, if the wall material 15 is made of a material with a heat insulating effect, By doing so, the surfaces of the pillars 3, 3, ... are covered with a heat insulating material, so that the outside cold air or It is possible to prevent hot air from reaching the inside of a wooden building through the pillars 3, 3, .... Examples of wall materials having a good heat insulating effect include extruded polystyrene foam. do.

[0029] 4. Embodiment 4 In addition, in the wooden buildings A and B of the present invention, a heat insulating material 16 may be provided on the ceiling board 6 covered with the resin sheet 10. By providing the heat insulating material 16 on the ceiling board 6 in this way, the temperature control by the air conditioning equipment inside the wooden building can be promoted more efficiently. In particular, the wooden building B of the present invention can have a relatively large space (space S in FIG. 7) on the ceiling board 6 by providing the additional girders 12 and the additional girders 13. In addition, the ceiling board 6 has no cross members on its upper surface, and even if there are columns, there are only a few columns of the rafters, and it has an extremely flat surface. Therefore, as shown in FIG. 11(a), the plate-shaped heat insulating material 16 can be piled up in multiple planar directions, and as shown in FIG. 11(b), multiple upright plate-shaped heat insulating materials 16 can be arranged without gaps. In the wooden building of the present invention, the ceiling board 6 is attached to the upper side of the cross member. In other words, since the upper side of the ceiling board 6 is in a flat state without obstacles, the heat insulating material 16 can be arranged without gaps. As shown in Figure 11(b), by arranging upright plate-shaped insulation material 16 without any gaps, the thickness of the insulation layer above the ceiling board 6 can be made as thick as possible, thereby further improving the air conditioning efficiency inside the wooden building.

[0030] 5. Embodiment 5 As a further embodiment of the present invention, a two or more story wooden building including a cross member, a floor plate, and a plurality of columns, The floor plate is provided on the upper surface of the cross member, There is a gap between the floorboards of floors other than the first floor and the outermost horizontal members. An example of a wooden building is one having an airtight resin sheet that continuously covers the multiple columns on their inner surfaces, and the resin sheet covering the multiple columns on one floor on their inner surfaces and the resin sheet covering the multiple columns on another floor on their inner surfaces are continuous via the gap. The wooden building of the fifth embodiment will be described below with reference to the drawings.

[0031] Fig. 12 is a schematic cross-sectional view of a two-story wooden building (wooden house) C according to embodiment 5, showing the state before the resin sheet is applied (cross-sectional view in the AB direction in Fig. 14). It goes without saying that the wooden building in embodiment 5 is not limited to two stories. The wooden building C in Fig. 12 is similar to the wooden building A in Fig. 1, except that there is no gap between the ceiling board 6 and the rafters X5 and Y8, and there is a gap G between the floor board 41 and the girder 4, 4 and floor beams 17, 17 described later, and the resin sheet 10 continuously covers the inner surfaces of the columns 3, 3, ... on the second floor and the inner surfaces of the columns 3, 3, ... on the first floor through the gap.

[0032] FIG. 13 is a schematic diagram showing a two-story wooden building (wooden house) C according to the fifth embodiment before the resin sheet 10 is applied (sectional view of E-F in FIG. 14). A gap G is provided between the floor board 41 and the girths 4, 4 and floor beams 17, 17 which are the outermost horizontal members. The resin sheet 10 covering the inner surface of the second floor column and the resin sheet 10 covering the inner surface of the first floor column are continuous through the gap G. The type of resin sheet 10 that can be used, the method of covering the inner surface of the columns 3, 3, ..., and the fixing method are the same as those in the first embodiment. Also, the gap G of the floor board 41 may be closed by the upper surface of the wall material 15, as in the third embodiment. Of course, it goes without saying that the gap of the floor board 41 may be closed by the lower surface of the wall material 15. Furthermore, as described above, the first and fifth embodiments may be combined to continuously cover from the upper surface of the ceiling board 6 to the inner surfaces of the columns 3, 3, ... on the first floor. [Industrial Applicability]

[0033] The wooden building of the present invention has high airtightness and high heat retention. Therefore, it is possible to provide a wooden building with extremely high energy efficiency when controlling the internal temperature. [Explanation of symbols]

[0034] 1: Foundation, 2: Base, 21: 1st floor floor board, 3: Pillar, 4: Girth, 41: 2nd floor floor board, 42: Cross member, 5: X-beam, 6: Ceiling board, 7: Roof, 8: Y-beam, 9: Z-beam, 10: Plastic sheet, 11: Tape, 12: Additional girder, 13: Additional main beam, 14: Additional minor beam, 15: Wall material, 16: Insulation material, 17: Floor beam

Claims

1. A wooden building including a cross member, a ceiling board, and a plurality of columns, The ceiling plate is provided on the upper surface of the cross member, There is a gap between the ceiling panel and the outermost horizontal member, A wooden building has an airtight resin sheet that covers an upper surface of the ceiling board and continuously covers the multiple columns on their inner surfaces, and the resin sheet that covers the upper surface of the ceiling board and the resin sheet that continuously covers the multiple columns on their inner surfaces are continuous with each other via the gap. A wooden building (excluding wooden buildings with gaps of 20 to 30 mm) is characterized in that a wall material is attached to the inner surface of the pillar via the resin sheet, and the gap is closed by the upper side of the wall material.

2. 2. The wooden building according to claim 1, wherein the cross member is an additional cross member provided below the rafter.

3. 3. The wooden building according to claim 1, wherein the wall material is a plate material made of a material having a heat insulating effect.

4. The wooden building according to any one of claims 1 to 3, wherein a heat insulating material is provided on the ceiling board covered with the resin sheet.

5. A wooden building with two or more stories including cross members, floorboards and multiple columns, The floor plate is provided on the upper surface of the cross member, There is a gap between the floorboards of floors other than the first floor and the outermost horizontal members. A wooden building has an airtight resin sheet continuously covering the plurality of columns on their inner surfaces, and the resin sheet covering the plurality of columns on one floor on their inner surfaces and the resin sheet continuously covering the plurality of columns on another floor on their inner surfaces are continuous with each other through the gap. A wooden building (excluding wooden buildings with gaps of 20 to 30 mm) is characterized in that a wall material is attached to the inner surface of the pillar via the resin sheet, and the gap is closed by the upper side of the wall material.

Images