Building

Abstract

Provided is a building capable of efficiently exhausting the air under the roof material and the air inside the side wall portion from the protruding portion. 【Solution means】The building includes a roof material, a side wall portion extending vertically so as to define a wall ventilation path, a protruding portion connecting the roof material and the side wall portion, a plurality of beams disposed below the roof material and extending in at least one of a first direction and a second direction, a plurality of support members each having an upper end portion that supports the roof material from below such that a space is formed between the roof material and the plurality of beams in the vertical direction, and a first heat insulating member having an upper surface disposed at an interval below the roof material so as to form a roof ventilation path between the roof material, and surrounded by the plurality of support members. The roof ventilation path has an air inlet and an air outlet, and is disposed between the roof material and the first heat insulating member from the air inlet to the air outlet. The protruding portion has an exhaust path that communicates each of the roof ventilation path and the wall ventilation path with the outdoor space.

Description

Technical Field

[0001] The present invention relates to a building.

Background Art

[0002] Conventionally, in a building having a flat roof extending in a horizontal direction, a building having a ventilation path in the under-roof space is known. For example, Patent Document 1 discloses a building including a flat roof extending in a horizontal direction, an exterior material extending in a vertical direction, and a parapet disposed so as to protrude upward from the flat roof and connecting the flat roof and the exterior material. The building further includes a heat insulating material disposed at a distance below the floor plywood constituting the flat roof so as to form a ventilation path between the purlin supporting the flat roof from below and the floor plywood. In this building, since the path for discharging the moisture in the attic under the flat roof is divided by the purlin, a part of the floor plywood on the purlin is notched, and ventilation is performed so as to cross the purlin through the notch.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the building described in Patent Document 1, there is a problem that sufficient ventilation of the space under the flat roof cannot be ensured. Specifically, in the above building, since air flows under the flat roof while moving up and down so as to cross the purlin, air stagnation is likely to occur partially. Further, in order to maintain the function of supporting the floor plywood of the flat roof by the purlin, the size of the notch is limited, and it becomes difficult for air to cross the purlin. As a result, the air under the flat roof cannot be efficiently sent to the parapet.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide a building capable of efficiently exhausting the air under the roofing material and the air in the side wall portion from the protruding portion.

Means for Solving the Problems

[0006] In order to solve the above problems, a building according to a first invention includes a roofing material extending in a horizontal direction, a side wall portion extending in the vertical direction so as to define a wall ventilation path through which air flows in the vertical direction, a protruding portion disposed so as to protrude upward from the roofing material and connecting the roofing material and the side wall portion, a plurality of beams disposed below the roofing material and extending in at least one of a horizontal first direction and a horizontal second direction intersecting each of the first direction and the vertical direction, each having an upper end portion that supports the roofing material from below so that a space is formed between the roofing material and the plurality of beams in the vertical direction, a plurality of support members disposed on the plurality of beams and extending in at least one of the first direction and the second direction, and a first heat insulating member having an upper surface disposed at an interval below the roofing material so as to form a roof ventilation path through which air flows in at least one of the first direction and the second direction between the space and the roofing material, and surrounded by the plurality of support members. The roof ventilation path has an air inlet, an air outlet, and a connection path connecting the air inlet and the air outlet. The path from the air inlet to the air outlet is disposed between the roofing material and the first heat insulating member in the vertical direction. The protruding portion has an exhaust path communicating each of the outlet of the roof ventilation path and the outlet of the wall ventilation path with the outdoor space.

[0007] According to the building related to the first invention, the upper end of each of the plurality of support members supports the roofing material from below so that a space is formed between the roofing material and the plurality of beams. And the upper surface of the first heat insulating member is arranged at an interval below the roofing material so that a roof ventilation passage is formed in this space. Here, the roof ventilation passage is arranged between the upper surface of the first heat insulating member and the roofing material from the air inlet to the air outlet. In this way, since the entire roof ventilation passage is arranged above the plurality of beams, the air flow is not obstructed by the plurality of beams, and the air can be directly sent from the roof ventilation passage to the protrusion. Thereby, compared with the case of forming an air flow in which the air reaches the protrusion after bypassing the beam, the air can be efficiently sent to the protrusion. As a result, the air under the roof and the air in the side wall portion can be efficiently exhausted from the protrusion.

[0008] The second invention is the building according to the first invention, wherein at least some of the plurality of support members may be formed with openings that allow the air flowing through the roof ventilation passage to pass through the some support members.

[0009] According to this configuration, even if some support members are interposed between the roof ventilation passage and the exhaust passage, since the some support members have openings, it is possible to suppress that the air flowing from the roof ventilation passage to the protrusion is obstructed by the some support members.

[0010] The third invention is the building according to the first or second invention, wherein a ceiling space is formed between the first heat insulating member in the vertical direction, and a ceiling member arranged at an interval below the first heat insulating member so as to partition the ceiling space and the indoor space below the ceiling space, and a roof moisture-proof line arranged along the lower surface of the first heat insulating member and preventing the moisture passing through the ceiling member from the indoor space from reaching the first heat insulating member may be further provided.

[0011] According to this configuration, a roof moisture-proof line is arranged along the lower surface of the first heat-insulating member, and a ceiling member is arranged at a distance below the first heat-insulating member so that a ceiling space is formed between the first heat-insulating member and the ceiling member. In this structure, compared with the case of adopting a structure in which a moisture-proof line is arranged on the ceiling member and a heat-insulating member is arranged on the moisture-proof line, a wider ceiling space can be formed between the first heat-insulating member and the ceiling member.

[0012] Also, according to the above configuration, since the first heat-insulating member is arranged above the roof moisture-proof line, the first heat-insulating member can suppress the roof moisture-proof line from being cooled by the outside air that has passed through the roof material from the outdoor space in winter or the like. Thus, even if the air in the indoor space containing moisture passes from the indoor space through the ceiling member and reaches the roof moisture-proof line, this air is difficult to be cooled, so condensation is less likely to occur. That is, according to the above configuration, it is possible to suppress the occurrence of so-called winter-type condensation, keep the environment of the formed ceiling space good, and maintain an environment equivalent to that of the indoor space.

[0013] A fourth invention may further include a second heat-insulating member arranged below the first heat-insulating member so as to sandwich the roof moisture-proof line from above and below between the second heat-insulating member and the first heat-insulating member in the building according to any one of the first to third inventions.

[0014] According to this configuration, since the second heat-insulating member is arranged below the roof moisture-proof line, the second heat-insulating member can suppress the roof moisture-proof line from being cooled by the air in the indoor space that has been cooled by the air conditioner in summer or the like and passed through the ceiling member. Thus, even if the outside air containing moisture passes from the outside through the roof material and reaches the roof moisture-proof line, this outside air is difficult to be cooled, so condensation is less likely to occur. That is, according to the above configuration, it is possible to suppress the occurrence of so-called summer-type condensation, keep the environment of the formed ceiling space good, and maintain an environment equivalent to that of the indoor space.

Effects of the Invention

[0015] According to the present invention, a building is provided that can efficiently exhaust the air under the roofing material and the air inside the side wall portion from the protruding portion.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0017] Hereinafter, with reference to the drawings, a building 1 according to an embodiment of the present invention will be described. FIG. 1 is a front sectional view showing the structure of a building 1 according to an embodiment of the present invention. FIG. 2 is a plan sectional view of the building 1. Note that FIG. 1 corresponds to the section at position I-I in FIG. 2. In each figure, the vertical direction, the horizontal first direction, and the horizontal second direction intersecting each of the first direction and the vertical direction are shown, but these directions are shown for explaining the building 1 according to the present embodiment and do not limit the structure, usage mode, etc. of the building according to the present invention.

[0018] As shown in FIGS. 1 and 2, the building 1 includes a roof material 11, a roof insulation member 12, a waterproof sheet 13, a drain part 14, a plurality of beams 20, a plurality of support members 30, a first roof-side insulation member 40 (an example of a first insulation member), a first auxiliary insulation member 60, a roof moisture-proof line 70, an indoor moisture-proof line 75, a second roof-side insulation member 80 (an example of a second insulation member), a second auxiliary insulation member 90, a ceiling member 100, a side wall part 110, and a protruding part 300.

[0019] As shown in FIG. 1, the roof material 11 extends along a horizontal direction and partitions an outdoor space OS above the roof material 11 and an attic space S1 below the roof material 11. The roof material 11 is composed of, for example, plywood.

[0020] The roof insulation member 12 is disposed on the roof material 11 to enhance the heat insulation between the outdoor space OS and the attic space S1.

[0021] The waterproof sheet 13 is disposed on the roof insulation member 12 to prevent rainwater and the like from entering the attic space S1.

[0022] The drain part 14 includes a drain pipe that opens upward and a drain cap that covers the opening of the drain pipe. Rainwater and the like accumulated on the roof material 11 flow into the drain pipe through the holes formed in the drain cap and are discharged from the drain pipe to the outside of the building 1.

[0023] The plurality of beams 20 are structural members of the building 1 and are arranged below the roofing material 11. As shown in FIG. 2, the plurality of beams 20 according to the present embodiment are composed of a first beam 21, a second beam 22, a third beam 23, a fourth beam 24, and a fifth beam 25. The first beam 21 to the third beam 23 are arranged at intervals in the first direction and each extends in the second direction. The first beam 21 to the third beam 23 are arranged in the order of the first beam 21, the second beam 22, and the third beam 23 from one side in the first direction (the left side in FIG. 2) to the other side in the first direction (the right side in FIG. 2). The fourth beam 24 extends in the first direction so as to connect the ends on one side (the upper side in FIG. 2) of the first beam 21 to the third beam 23 in the second direction. The fifth beam 25 is arranged at an interval from the fourth beam 24 in the second direction and extends in the first direction so as to connect the ends on the other side (the lower side in FIG. 2) of the first beam 21 to the third beam 23 in the second direction. Note that the plurality of beams 20 may extend in the first direction or the second direction.

[0024] The plurality of support members 30 are respectively arranged on the upper surfaces (beam upper surfaces) of the plurality of beams 20. As shown in FIG. 2, the plurality of support members 30 according to the present embodiment are composed of a first support member 31 to a ninth support member 39. The first support member 31 is arranged on the upper surface 21a of the first beam 21 and extends in the second direction. The second support member 32 is arranged on the upper surface 23a of the third beam 23 and extends in the second direction. The third support member 33 is arranged on the upper surface 24a of the fourth beam 24 and extends in the first direction so as to connect the ends on one side (the upper side in FIG. 2) of the first support member 31 and the second support member 32 in the second direction. Each of the fourth support member 34 to the eighth support member 38 has a portion arranged on the upper surface 21a of the first beam 21, a portion arranged on the upper surface 22a of the second beam 22, and a portion arranged on the upper surface 23a of the third beam 23, and extends in the first direction so as to connect the first support member 31 and the second support member 32. The ninth support member 39 is arranged on the upper surface 25a of the fifth beam 25 and extends in the first direction so as to connect the ends on the other side (the lower side in FIG. 2) of the first support member 31 and the second support member 32 in the second direction. Note that the plurality of support members 30 may extend in the first direction or the second direction.

[0025] Referring to FIG. 1, the plurality of support members 30 each have an upper end portion (support member upper end portion) 30a that supports the roof member 11 from below such that a beam space S2 is formed between the roof member 11 and the plurality of beams 20 in the vertical direction. In the present embodiment, the height positions of the upper end portions 30a in the vertical direction are set to be the same. That is, the upper end portions 30a are located on the same plane in the horizontal direction. The plurality of support members 30 are constituted by, for example, purlins.

[0026] FIG. 3 shows the second support member 32 of the building 1. FIG. 3(A) is a front view thereof. FIG. 3(B) is a side view thereof, and FIG. 3(C) is a top view thereof. As shown in FIGS. 3(A) to 3(C), the second support member 32 is formed with openings that allow air flowing through a plurality of roof ventilation paths 50, which will be described later, to pass through the second support member 32. The openings according to the present embodiment are each formed by being cut out downward from the upper surface of the second support member 32, and are six notches 32C formed at intervals in the second direction. However, the configuration of the openings is not limited to this, and the openings may be, for example, six holes opened in the second support member 32 at intervals in the second direction. Incidentally, the above-described openings may be further formed not only in the second support member 32 but also in any one of the first support member 31 and the third support member 33 to the ninth support member 39.

[0027] Returning to FIG. 1, the roof-side first heat insulating member 40 is housed inside the plurality of support members 30 so as to be surrounded by the plurality of support members 30. Specifically, as shown in FIG. 2, the roof-side first heat insulating member 40 is housed inside the first support member 31, the second support member 32, the third support member 33, and the ninth support member 39 so as to be surrounded by the first support member 31, the second support member 32, the third support member 33 beam, and the ninth support member 39. In FIG. 2, only a part near the contour of the roof-side first heat insulating member 40 is shown, and illustration of other parts is omitted. As shown in FIG. 1, the roof-side first heat insulating member 40 is arranged so as to cover from the lower end portion of the inner surface of each support member 30 to the central portion in the vertical direction. The roof-side first heat insulating member 40 is constituted by a rigid heat insulating material such as extruded polystyrene foam.

[0028] The roof-side first heat insulating member 40 has an upper surface (first heat insulating upper surface) 40a disposed at a distance below the roof member 11. As shown in FIG. 1, a plurality of roof ventilation passages 50 through which air flows to the other side in the first direction are formed between the upper surface 40a and the roof member 11 in the vertical direction. That is, a plurality of roof ventilation passages 50 are formed in the space S2 above the beam. FIG. 1 shows a first roof ventilation passage 51 among the plurality of roof ventilation passages 50.

[0029] Note that the arrangement of the roof-side first heat insulating member 40 shown in FIGS. 1 and 2 is merely an example. The arrangement of the roof-side first heat insulating member 40 can be appropriately changed as long as a plurality of roof ventilation passages 50 are formed between the upper surface 40a and the roof member 11 in the vertical direction. Therefore, the roof-side first heat insulating member 40 does not necessarily have to be arranged so as to cover from the lower end portion to the central portion in the vertical direction of the inner surface of each support member 30. For example, the roof-side first heat insulating member 40 may cover only the lower end portion of the inner surface of each support member 30.

[0030] The plurality of roof ventilation passages 50 each have an air inlet EN, an air outlet EX, and a connecting passage CN that connects the air inlet EN and the air outlet EX. As shown in FIG. 1, from the air inlet EN to the air outlet EX, they are arranged between the roof material 11 and the upper surface 40a of the first roof-side heat insulating member 40 in the vertical direction. Note that the "air inlet EN" refers to the inlet when air enters between the roof material 11 and the upper surface 40a of the first roof-side heat insulating member 40 from the second indoor space RM2 and the like, which will be described later. In FIGS. 1 and 2, an example is shown where the air inlet EN exists in the vicinity of the first support member 31, but this is merely an example, and the air inlet EN may exist at positions other than those shown in FIGS. 1 and 2. Also, there may be a plurality of air inlets EN. In the present embodiment, each of the six notches 32C formed in the second support member 32 functions as the air outlet EX of each of the first to sixth roof ventilation passages 51 to 56. The plurality of roof ventilation passages 50 only need to be arranged between the roof material 11 and the upper surface 40a of the first roof-side heat insulating member 40 from the air inlet EN to the air outlet EX in the vertical direction. For this reason, as shown in FIG. 1, the air outlet EX may be arranged on one side of the first roof-side heat insulating member 40 in the first direction.

[0031] As shown in FIG. 2, the plurality of roof ventilation passages 50 according to the present embodiment are constituted by the first to sixth roof ventilation passages 51 to 56. As shown by the arrows A1 to A6 in FIG. 2, in the plurality of roof ventilation passages 50, air flows to the other side in the first direction. Each of the plurality of roof ventilation passages 50 is arranged between the plurality of support members 30 in the second direction. For example, the first roof ventilation passage 51 is arranged between the third support member 33 and the fourth support member 34 in the second direction. The second roof ventilation passage 52 is arranged between the fourth support member 34 and the fifth support member 35 in the second direction. Hereinafter, in the same manner, the third roof ventilation passage 53, the fourth roof ventilation passage 54, the fifth roof ventilation passage 55, and the sixth roof ventilation passage 56 are arranged.

[0032] Returning to FIG. 1, the first auxiliary heat insulating member 60 is disposed above the roof-side first heat insulating member 40 and covers the side surface on the other side of the first support member 31 in the first direction. The first auxiliary heat insulating member 60 is made of a heat insulating material such as extruded expanded polystyrene or the like.

[0033] The roof moisture-proof line 70 is disposed along the lower surface (the first heat insulating lower surface) 40b of the roof-side first heat insulating member 40 to prevent moisture that has passed through the ceiling member 100 from reaching the roof-side first heat insulating member 40 (the beam space S2) in winter, and moisture that has invaded from the connection path CN from reaching the roof-side second heat insulating member 80 (the ceiling-back space S3 described later) in summer. The roof moisture-proof line 70 is composed of, for example, a moisture-proof sheet made of resin. The roof moisture-proof line 70 extends planar in the first direction and the second direction and has one end on one side in the first direction and the other end on the other side in the first direction. One end on one side in the first direction is connected to the lower end of the indoor moisture-proof line 75, and the other end on the other side in the first direction is connected to the upper end of the wall moisture-proof line 200.

[0034] The indoor moisture-proof line 75 extends along the vertical direction so as to be connected to the above-mentioned one end on one side of the roof moisture-proof line 70. In the present embodiment, the moisture-proof property between the first indoor space RM1 existing on one side of the indoor moisture-proof line 75 in the first direction and the outdoor space OS is enhanced. The indoor moisture-proof line 75 is composed of, for example, a moisture-proof sheet made of resin. Note that the first indoor space RM1 is not essential.

[0035] The roof-side second heat-insulating member 80 is disposed below the roof-side first heat-insulating member 40 so as to sandwich the roof moisture-proof line 70 from above and below with the roof-side first heat-insulating member 40, and is accommodated inside a plurality of beams 20. Specifically, the roof-side second heat-insulating member 80 according to the present embodiment includes a first second heat-insulating member element 81 accommodated inside the first beam 21, the second beam 22, the fourth beam 24, and the fifth beam 25, and a second second heat-insulating member element 82 accommodated inside the second beam 22, the third beam 23, the fourth beam 24, and the fifth beam 25. Both the second heat-insulating member elements 81 and 82 are disposed inside each beam so as to cover the upper portion of the inner surface of each beam. Both the second heat-insulating member elements 81 and 82 are made of a heat-insulating material such as extruded polystyrene foam.

[0036] The second auxiliary heat-insulating member 90 is disposed below the roof-side second heat-insulating member 80 and covers a substantially central portion of one side surface of the third beam 23 in the first direction. The second auxiliary heat-insulating member 90 is made of a heat-insulating material such as extruded polystyrene foam.

[0037] The ceiling member 100 forms a ceiling back space S3 between the roof-side first heat-insulating member 40 in the vertical direction and partitions the ceiling back space S3 from the second indoor space RM2 (an example of an indoor space) below the ceiling back space S3, and is disposed at a distance below the roof-side first heat-insulating member 40. In the present embodiment, the ceiling member 100 is disposed at a distance below the roof-side second heat-insulating member 80. Note that the ceiling member 100 forms a soffit space S1 between the roof member 11 in the vertical direction. That is, in the present embodiment, the space existing between the roof member 11 and the ceiling member 100 in the vertical direction is the soffit space S1, the space existing between the roof member 11 and the plurality of beams 20 in the vertical direction is the beam upper space S2, and the space existing between the roof-side first heat-insulating member 40 and the ceiling member 100 in the vertical direction is the ceiling back space S3.

[0038] The side wall portion 110 is disposed at a position separated from the roof member 11 on the other side in the first direction, and extends in the vertical direction so as to define a wall ventilation path 115 through which air flows along the vertical direction.

[0039] FIG. 4 is a front cross-sectional view showing an enlarged view of the periphery of the side wall portion 110 of the building 1 in FIG. 1. As shown in FIG. 4, the building 1 includes, on one side of the side wall portion 110 in the first direction, a wall-side first vertical frame portion 120, a wall-side waterproof and windproof sheet 130, a wall-side first heat insulating member 140, a wall-side base material 150, a wall-side second vertical frame portion 160, a wall-side horizontal frame portion 170, a wall-side second heat insulating member 180, a wall-side third heat insulating member 190, a wall moisture-proof line 200, a frame body 210, and an inner wall 220.

[0040] The wall-side first vertical frame portion 120 is disposed at a position separated from one side of the side wall portion 110 in the first direction, and extends in the vertical direction so as to form a wall ventilation passage 115 between the side wall portion 110 in the first direction.

[0041] The wall-side waterproof and windproof sheet 130 is disposed so as to cover the side surface on the other side of the wall-side first vertical frame portion 120 in the first direction, extends in the vertical direction, and suppresses rain and wind from passing through the wall-side first vertical frame portion 120 in the first direction.

[0042] The wall-side first heat insulating member 140 is disposed on the other side of the wall-side first vertical frame portion 120 in the second direction and extends in the vertical direction. As shown in FIG. 4, the dimension of the wall-side first heat insulating member 140 in the first direction is substantially the same as the dimension of the wall-side first vertical frame portion 120 in the first direction. The wall-side first heat insulating member 140 is composed of a rigid heat insulating material such as extruded polystyrene foam.

[0043] The wall-side base material 150 is disposed on one side of the wall-side first vertical frame portion 120 in the first direction and extends along the vertical direction. The wall-side base material 150 according to the present embodiment is composed of, for example, plywood.

[0044] The wall-side second vertical frame portion 160 is disposed on one side of the wall-side base material 150 in the first direction and on the other side of the second support member 32 in the first direction, and extends in the vertical direction. In the present embodiment, a communication passage 161 that communicates a plurality of roof ventilation passages 50 and a roof exhaust passage 375 described later is formed on the other side of the wall-side second vertical frame portion 160 in the second direction.

[0045] The wall-side horizontal frame portion 170 is disposed on the third beam 23 and extends in the second direction with the lower end portion of the wall-side second vertical frame portion 160 as a base point.

[0046] The wall-side second heat insulating member 180 is disposed on the other side of the wall-side second vertical frame portion 160 in the second direction and is provided on the wall-side horizontal frame portion 170. As shown in FIG. 4, the wall-side second heat insulating member 180 has an upper surface (second heat insulating upper surface) 180a that is substantially flush with the bottom surface 32b of the notch 32C of the second support member 32 in the first direction. Further, as shown in FIG. 4, the dimension of the wall-side second heat insulating member 180 in the first direction is substantially the same as the dimension of the wall-side second vertical frame portion 160 in the first direction. The wall-side second heat insulating member 180 according to the present embodiment is composed of a rigid heat insulating material such as extruded polystyrene foam.

[0047] The wall-side third heat insulating member 190 is disposed on one side of the wall-side base material 150 and below the third beam 23 in the first direction and extends in the vertical direction. The wall-side third heat insulating member 190 is composed of a fibrous heat insulating material such as cellulose fiber, rock wool, or glass wool. However, the wall-side third heat insulating member 190 may be composed of a rigid heat insulating material such as extruded polystyrene foam.

[0048] The wall moisture-proof line 200 is disposed on one side of the wall-side third heat insulating member 190 and the third beam 23 in the first direction and extends in the vertical direction so as to connect to the other end of the roof moisture-proof line 70 in the first direction. The wall moisture-proof line 200 is composed of, for example, a moisture-proof sheet made of resin.

[0049] The frame body 210 is disposed on one side of the wall moisture-proof line 200 in the first direction. The frame body 210 has a vertical frame extending in the vertical direction and a horizontal frame extending in the second direction from the upper end portion of the vertical frame.

[0050] The inner wall 220 is disposed on one side of the frame body 210 in the first direction and extends in the vertical direction so as to connect to the other end of the ceiling member 100 in the first direction and partitions the second indoor space RM2 together with the ceiling member 100. The inner wall 220 is composed of, for example, a plate material such as a gypsum board.

[0051] Continuing to refer to FIG. 4, the protrusion 300 is arranged to protrude upward from the roof material 11 and connects the roof material 11 and the side wall portion 110. The protrusion 300 according to the present embodiment is a parapet that rises from the other end of the roof material 11 in the first direction and extends in the second direction. As shown in FIG. 4, the protrusion 300 includes a protrusion outer wall 310, a first vertical frame portion 320 on the protrusion side, a waterproof and windproof sheet 325 on the protrusion side, a first horizontal frame portion 330 on the protrusion side, a base material 335 on the protrusion side, a second vertical frame portion 340 on the protrusion side, a second horizontal frame portion 350 on the protrusion side, a base wood 360, a protrusion inner wall 370, a protrusion top wall 380, a waterproof material 385, and a cover member 390.

[0052] The protrusion outer wall 310 has a lower end connected to the upper end of the side wall portion 110 and extends in the vertical direction so as to define a wall exhaust passage 315 (an example of an exhaust passage) that indirectly communicates the outlet 115A (FIG. 4) of the wall ventilation passage 115 and the outdoor space OS.

[0053] The first vertical frame portion 320 on the protrusion side is arranged at a distance from the protrusion outer wall 310 on one side in the first direction, and forms a wall exhaust passage 315 between the protrusion outer wall 310 in the first direction. The first vertical frame portion 320 on the protrusion side has a lower end connected to the upper end of the first vertical frame portion 120 on the wall side and extends in the vertical direction.

[0054] The waterproof and windproof sheet 325 on the protrusion side is arranged on the other side of the first vertical frame portion 320 on the protrusion side in the first direction so as to cover the first vertical frame portion 320 on the protrusion side, and has a lower end connected to the upper end of the waterproof and windproof sheet 130 on the wall side and extends along the vertical direction. The waterproof and windproof sheet 325 on the protrusion side suppresses rain and wind from passing through the first vertical frame portion 320 on the protrusion side in the first direction.

[0055] The first horizontal frame portion 330 on the protrusion side is connected to the upper end portion of the first vertical frame portion 320 on the protrusion side and extends in the second direction.

[0056] The protruding portion side base material 335 is disposed on one side of the protruding portion side first vertical frame portion 320 in the first direction, has a lower end connected to the upper end of the wall side base material 150, and extends along the vertical direction.

[0057] The protruding portion side second vertical frame portion 340 is disposed on one side of the protruding portion side base material 335 in the first direction, has a lower end connected to the upper end of the wall side second vertical frame portion 160, and extends in the vertical direction.

[0058] The protruding portion side second horizontal frame portion 350 is connected to the upper end portion of the wall side second vertical frame portion 160 and extends in the second direction. A second horizontal frame opening is formed in the protruding portion side second horizontal frame portion 350 to allow air to pass through the protruding portion side second horizontal frame portion 350 in the vertical direction.

[0059] The base wood 360 is disposed between the protruding portion side base material 335 and the protruding portion inner wall 370 in the first direction and below the protruding portion side second horizontal frame portion 350, and extends in the second direction. A base wood opening is formed in the base wood 360 to communicate with the second horizontal frame opening of the protruding portion side second horizontal frame portion 350 and allow air to pass through the base wood 360 in the vertical direction.

[0060] The protruding portion inner wall 370 is disposed at a predetermined interval on one side in the first direction with respect to the protruding portion side base material 335, and forms a roof exhaust passage 375 (an example of an exhaust passage) that indirectly communicates the outlet EX of the plurality of roof ventilation passages 50 and the outdoor space OS between the protruding portion side base material 335 in the first direction. The protruding portion inner wall 370 extends in the vertical direction so as to protrude upward with the other end of the roof material 11 in the first direction as a base point. The protruding portion inner wall 370 is fixed to the base wood 360 by a fixing member such as a screw.

[0061] The protruding top wall 380 extends in a first direction so as to connect the upper end of the protruding inner wall 370 and the upper end of the protruding outer wall 310. The protruding top wall 380 is formed with a wall side opening 381 that communicates the wall exhaust passage 315 with a cover lower space P described later, and a roof side opening 382 that communicates the roof exhaust passage 375 with the cover lower space P described later. The wall side opening 381 and the roof side opening 382 are, for example, holes that penetrate the protruding top wall 380 in the vertical direction.

[0062] The waterproof material 385 is provided along the lower surface of the protruding top wall 380, and suppresses the intrusion of rainwater or the like into at least one of the wall side opening 381 and the roof side opening 382. The other end of the waterproof material 385 in the first direction is connected to the upper end of the wall side waterproof and windproof sheet 130.

[0063] The cover member 390 is disposed on the protruding top wall 380 so as to cover the upper end of the protruding top wall 380. The cover member 390 has a cover top surface portion 391, a one-side convex portion 392, and an other-side convex portion 393.

[0064] The cover top surface portion 391 is supported from below by a leg portion (not shown) that rises from the protruding top wall 380 so that a cover lower space P is formed between the cover top surface portion 391 and the protruding top wall 380 in the vertical direction, and extends in the first direction above the protruding top wall 380. As shown in FIG. 4, the dimension of the cover top surface portion 391 in the first direction is larger than the dimension of the protruding top wall 380 in the first direction.

[0065] The one-side convex portion 392 protrudes downward with the one-side end portion of the cover top surface portion 391 in the first direction as a base point so that a first gap G1 is formed between the one-side convex portion 392 and the protruding inner wall 370 in the first direction.

[0066] The other-side convex portion 393 protrudes downward with the other-side end portion of the cover top surface portion 391 in the first direction as a base point so that a second gap G2 is formed between the other-side convex portion 393 and the protruding outer wall 310 in the first direction.

[0067] The wall exhaust passage 315 indirectly communicates the wall ventilation passage 115 with the outdoor space OS. The wall exhaust passage 315 according to the present embodiment is formed between the outer wall 310 of the protruding portion and the first longitudinal frame portion 320 on the protruding portion side in the first direction. As shown by the arrow A7 in FIG. 4, in the present embodiment, the air flowing from the wall ventilation passage 115 to the wall exhaust passage 315 passes through the wall-side opening 381 of the top wall 380 of the protruding portion and reaches the space P under the cover, and then reaches the outdoor space OS through the second gap G2 from the space P under the cover. Note that the air flowing into the space P under the cover may flow into the outdoor space OS through the first gap G1 instead of the second gap G2.

[0068] The roof exhaust passage 375 indirectly communicates the plurality of roof ventilation passages 50 with the outdoor space OS. The roof exhaust passage 375 according to the present embodiment is formed between the base material 335 on the protruding portion side and the inner wall 370 of the protruding portion in the first direction and on the other side of the second longitudinal frame portion 340 on the protruding portion side in the second direction. As shown by the arrow A8 in FIG. 4, in the present embodiment, the air flowing from the plurality of roof ventilation passages 50 to the roof exhaust passage 375 via the communication passage 161 reaches the space P under the cover through the base-wood opening of the base wood 360, the second horizontal frame opening of the second horizontal frame portion 350 on the protruding portion side, and the roof-side opening 382 of the top wall 380 of the protruding portion, and then reaches the outdoor space OS through the first gap G1 from the space P under the cover. Note that the air flowing into the space P under the cover may flow into the outdoor space OS through the second gap G2 instead of the first gap G1.

[0069] Next, the operation and effect of the present embodiment will be described.

[0070] According to the building 1 according to this embodiment, the upper end portions 30a of the plurality of support members 30 support the roofing material 11 from below so that a beam space S2 is formed between the roofing material 11 and the plurality of beams 20. Then, the upper surface 40a of the roof-side first heat insulating member 40 is disposed at an interval below the roofing material 11 so that a plurality of roof ventilation passages 50 are formed in the beam space S2. Here, each of the plurality of roof ventilation passages 50 is disposed between the upper surface 40a of the roof-side first heat insulating member 40 and the roofing material 11 in the vertical direction from the air inlet EN to the air outlet EX. In this way, since the entirety of each of the plurality of roof ventilation passages 50 is disposed above the plurality of beams 20, the air flow in the plurality of roof ventilation passages 50 is not obstructed by the plurality of beams 20, and air can be directly sent from the plurality of roof ventilation passages 50 to the protrusion 300. Thereby, as compared with other buildings in which the air under the roofing material moves (detours) over the beam through the opening provided in the portion of the roofing material directly above the beam and then reaches the protrusion, air can be efficiently sent to the protrusion 300. As a result, the air in the plurality of roof ventilation passages 50 and the air in the wall ventilation passage 115 can be efficiently exhausted from the protrusion 300.

[0071] Furthermore, in the building 1 according to this embodiment, since the air flow in the plurality of roof ventilation passages 50 is not obstructed by the plurality of beams 20, it is not necessary to form at least a ventilation path for detouring the beam in the roofing material 11 as in the above building. That is, it is not necessary to provide a notch in the roofing material 11. Thus, in the building 1, since it is not necessary to form a notch in the roofing material 11, the strength of the roofing material 11 can be improved and construction such as rain leakage countermeasures becomes easy.

[0072] In the building 1 according to the present embodiment, since the second support member 32 has a plurality of notches 32C as openings, even when the second support member 32 is interposed between the plurality of roof ventilation passages 50 in the first direction and the roof exhaust passage 375 of the protruding portion 300, air passes through the plurality of notches 32C in the first direction through the second support member 32 and reaches the roof exhaust passage 375 of the protruding portion 300. Thus, in the building 1, it is possible to suppress the second support member 32 from obstructing the flow of air from the plurality of roof ventilation passages 50 to the protruding portion 300.

[0073] In the building 1 according to the present embodiment, a roof moisture-proof line 70 is disposed along the lower surface 40b of the roof-side first heat insulating member 40, and a ceiling member 100 is disposed at a distance below the roof-side first heat insulating member 40 so that a ceiling-back space S3 is formed between the ceiling member 100 and the roof-side first heat insulating member 40. According to this structure, compared with the case of adopting a structure in which a moisture-proof line is disposed on the upper surface of the ceiling member and a heat insulating member is disposed on the upper surface of the moisture-proof line, the ceiling-back space S3 between the roof-side first heat insulating member 40 and the ceiling member 100 in the vertical direction can be formed widely. Here, since the ceiling-back space S3 exists below the roof-side first heat insulating member 40 and below the roof moisture-proof line 70, a temperature and humidity environment substantially equivalent to that of the second indoor space RM2 is realized in the ceiling-back space S3. In the present embodiment, since such a wide ceiling-back space S3 is formed, the ceiling-back space S3 can be used as a placement location for equipment such as refrigerant pipes where summer-type condensation is likely to occur. As a result, the functionality of the building 1 is improved.

[0074] In the building 1 according to the present embodiment, since the roof-side first heat insulating member 40 is disposed above the roof moisture-proof line 70, the roof-side first heat insulating member 40 can suppress the roof moisture-proof line 70 from being cooled by the outside air that has passed through the roof material 11 in winter or the like. Thereby, even if the air in the second indoor space RM2 containing moisture reaches the roof moisture-proof line 70 from the second indoor space RM2 through the ceiling member 100, this air is difficult to be cooled, so that condensation is less likely to occur. That is, according to the above configuration, it is possible to suppress the occurrence of so-called winter-type condensation, maintain the environment of the formed ceiling-back space S3 in good condition, and maintain an environment equivalent to that of the indoor space.

[0075] In the building 1 according to the present embodiment, the second heat insulating member 80 on the roof side is disposed below the roof moisture prevention line 70. In other words, the second heat insulating member 80 on the roof side is disposed below the first heat insulating member 40 on the roof side so as to sandwich the roof moisture prevention line 70 from above and below with the first heat insulating member 40 on the roof side. Therefore, the roof moisture prevention line 70 can be suppressed from being cooled by the air in the second interior space RM2 that has passed through the ceiling member 100 and cooled by the air conditioner installed in the second interior space RM2 in summer or the like by the second heat insulating member 80 on the roof side. Thereby, even if the outside air containing moisture passes from the outdoor space OS through the roof material 11 and reaches the roof moisture prevention line 70, the outside air is difficult to be cooled, so that condensation is unlikely to occur. That is, according to the above configuration, the occurrence of so-called summer-type condensation can be suppressed, the environment of the formed ceiling back space S3 can be kept good, and an environment equivalent to the interior space can be maintained.

[0076] Furthermore, in the building 1 according to the present embodiment, the wall-side second heat insulating member 180 has an upper surface (second heat insulating upper surface) 180a that is substantially flush with the bottom surface 32b of the notch 32C of the second support member 32 in the first direction. Therefore, the air flowing from the plurality of roof ventilation paths 50 toward the roof exhaust path 375 of the protrusion 300 can pass through the upper side of the wall-side second heat insulating member 180 and flow into the roof exhaust path 375. That is, in the present embodiment, it is suppressed that the wall-side second heat insulating member 180 obstructs the flow of air from the plurality of roof ventilation paths 50 to the roof exhaust path 375 of the protrusion 300.

[0077] Furthermore, in the building 1 according to the present embodiment, the upper part of the other side surface of the first support member 31 in the first direction is covered by the first auxiliary heat insulating member 60, and the central part to the lower part in the vertical direction of the other side surface is covered by the first heat insulating member 40 on the roof side. Therefore, it is suppressed that the first support member 31 is cooled or warmed by the air existing in the plurality of roof ventilation paths 50.

[0078] [Modified Embodiment] The building according to the present invention has been described above. However, the present invention is not limited to the previous embodiments in any way. For example, for the building 1 according to the previous embodiment, the following modified embodiments can be adopted.

[0079] (1) FIGS. 5 is a front cross-sectional view of a building 1A according to a first modified embodiment of the present disclosure. FIG. 6 is a plan cross-sectional view of the building 1A according to the first modified embodiment of the present disclosure. Note that FIG. 5 is a cross-sectional view taken along line V-V of FIG. 6. In FIGS. 5 and 6, members having the same functions as those in the previous embodiment are denoted by the same reference numerals as in FIGS. 1 and 2. Here, the description will focus on the differences from the previous embodiment.

[0080] As shown in FIGS. 5 and 6, a plurality of beams 20A according to this modified embodiment are composed of a first beam 201A to a sixth beam 206A. As shown in FIG. 5, the first beam 201A and the second beam 202A are arranged at intervals in the first direction and each extends along the second direction. In this modified embodiment, the first beam 201A is arranged on one side of the second beam 202A in the first direction. As shown in FIG. 6, the third beam 203A extends in the first direction so as to connect the one-side ends of the first beam 201A and the second beam 202A in the second direction. The fourth beam 204A is arranged on the other side of the third beam 203A in the second direction and extends in the first direction so as to connect the first beam 201A and the second beam 202A. The fifth beam 205A is arranged on the other side of the fourth beam 204A in the second direction and extends in the first direction so as to connect the first beam 201A and the second beam 202A. The sixth beam 206A is arranged on the other side of the fifth beam 205A in the second direction and extends in the first direction so as to connect the other-side ends of the first beam 201A and the second beam 202A in the second direction.

[0081] The plurality of support members 30A according to this modified embodiment are composed of a first support member 301A to a seventh support member 307A. As shown in FIG. 5, the first support member 301A to the fifth support member 305A are arranged at intervals in the first direction and extend in the second direction. The first support member 301A to the fifth support member 305A according to this modified embodiment are arranged in the order of the first support member 301A, the second support member 302A, the third support member 303A, the fourth support member 304A, and the fifth support member 305A from one side to the other side in the first direction. As shown in FIG. 6, the first support member 301A is arranged on the upper surface 201a of the first beam 201A. Each of the second support member 302A, the third support member 303A, and the fourth support member 304A has a portion arranged on the upper surface 203a of the third beam 203A, a portion arranged on the upper surface 204a of the fourth beam 204A, a portion arranged on the upper surface 205a of the fifth beam 205A, and a portion arranged on the upper surface 206a of the sixth beam 206A. The fifth support member 305A is arranged on the upper surface 202a of the second beam 202A. The sixth support member 306A and the seventh support member 307A are arranged at intervals in the second direction. The sixth support member 306A is arranged on the upper surface 203a of the third beam 203A and extends in the first direction so as to connect the one-side end portions of the first support member 301A to the fifth support member 305A in the second direction. The seventh support member 307A is arranged on the upper surface 206a of the sixth beam 206A and extends in the first direction so as to connect the other-side end portions of the first support member 301A to the fifth support member 305A in the second direction.

[0082] Each of the above-mentioned first support member 301A to seventh support member 307A has an upper end portion 30a that supports the roofing material 11 from below and forms a beam space S2 between the roof-side first heat insulating member 40 and the plurality of beams 20A in the vertical direction.

[0083] Similar to the previous embodiment, a plurality of roof ventilation passages 50A are formed between the upper surface 40a of the roof-side first heat insulating member 40 and the roof material 11 in the vertical direction. The plurality of roof ventilation passages 50A according to this modified embodiment are composed of a first roof ventilation passage 501A, a second roof ventilation passage 502A, a third roof ventilation passage 503A, and a fourth roof ventilation passage 504A. As shown in FIG. 6, the first roof ventilation passage 501A is formed between the first support member 301A and the second support member 302A in the first direction. The second roof ventilation passage 502A is formed between the second support member 302A and the third support member 303A in the first direction. The third roof ventilation passage 503A is formed between the third support member 303A and the fourth support member 304A in the first direction. The fourth roof ventilation passage 504A is formed between the fourth support member 304A and the fifth support member 305A in the first direction. As shown by the arrows A9 to A16 in FIG. 6, in the first roof ventilation passage 501A to the fourth roof ventilation passage 504A, air flows at least on one side and the other side in the second direction. Further, as shown by the arrows A17 to A19 in FIG. 6, in the fourth roof ventilation passage 504A, a part of the air flows to the other side in the first direction.

[0084] The fifth support member 305A according to this modified embodiment has an opening that allows a part of the air in the fourth roof ventilation passage 504A to pass through the fifth support member 305A in the first direction. Specifically, the fifth support member 305A is composed of three notches that respectively notch the upper surface of the fifth support member 305A downward and are formed at intervals from each other in the second direction. These notches function as an outlet EX for the air in the fourth roof ventilation passage 504A.

[0085] The sixth support member 306A has an opening that allows the air in the first roof ventilation passage 501A to the fourth roof ventilation passage 504A to pass through the sixth support member 306A in the second direction. Specifically, the sixth support member 306A is composed of four notches that respectively notch the upper surface of the sixth support member 306A downward and are formed at intervals from each other in the first direction. These notches function as an outlet EX for the air in the first roof ventilation passage 501A to the fourth roof ventilation passage 504A.

[0086] The seventh support member 307A has an opening similar to the opening of the sixth support member 306A described above. That is, it allows the air in the first to fourth roof ventilation passages 501A to 504A to pass through the seventh support member 307A in the second direction, and has four notches that function as the outlets EX of the air in the first to fourth roof ventilation passages 501A to 504A.

[0087] Although detailed illustration is omitted, the building 1A according to this modified embodiment further includes a one-sided protruding portion and an other-sided protruding portion in addition to the protruding portion 300 described in the previous embodiment. The one-sided protruding portion is a parapet that rises from one end of the roof member 11 in the second direction and extends in the first direction. The one-sided protruding portion has a one-sided exhaust passage that communicates a plurality of roof ventilation passages 50A and the outdoor space OS so as to be able to discharge the air that has passed through the sixth support member 306A in the second direction to the outdoor space OS. The other-sided protruding portion is a parapet that rises from the other end of the roof member 11 in the second direction and extends in the first direction. The other-sided protruding portion has an other-sided exhaust passage that communicates a plurality of roof ventilation passages 50A and the outdoor space OS so as to be able to send the air that has passed through the seventh support member 307A in the second direction to the outdoor space OS.

[0088] Even in the building 1A having the above configuration, the same effects as those of the building 1 according to the previous embodiment can be obtained.

[0089] Furthermore, the building 1A according to this modified embodiment can discharge the air in the attic space S1 in three directions. Specifically, the building 1A includes first to third roof ventilation passages 501A to 503A capable of flowing the air in the attic space S1 to both sides in the second direction, and a fourth roof ventilation passage 504A capable of flowing the air in the attic space S1 to both sides in the second direction and the other side in the first direction. The air flowing through these roof ventilation passages 50A to either of both sides in the second direction or the other side in the first direction reaches one of the roof exhaust passage 375 of the protruding portion 300, the one - side exhaust passage of the one - side protruding portion, and the other - side exhaust passage of the other - side protruding portion, and is discharged to the outdoor space OS. In this way, the air in the attic space S1 can be discharged more efficiently.

[0090] (2) In the previous embodiment, the wall exhaust passage 315 and the roof exhaust passage 375 are separated in the first direction, and an example where the air flowing through the wall exhaust passage 315 and the air flowing through the roof exhaust passage 375 are independent of each other has been described. However, the air flowing through the wall exhaust passage 315 and the air flowing through the roof exhaust passage 375 may merge. Hereinafter, this will be described with reference to FIGS. 7 and 8. FIG. 7 is a front cross - sectional view of a protruding portion 600 according to a second modified embodiment of the present disclosure. FIG. 8 is a front cross - sectional view of a protruding portion 700 according to a third modified embodiment of the present disclosure. In FIGS. 7 and 8, members having the same functions as those in the previous embodiment are denoted by the same reference numerals as in FIG. 4. Here, the description will focus on the differences from the previous embodiment.

[0091] The protruding portion 600 shown in FIG. 7 includes a plurality of partition members 601, a guide member 602, and a protruding - portion - side base material 604.

[0092] The plurality of partition members 601 are arranged on one side of the protruding - portion outer wall 310 in the first direction so as to form a wall exhaust passage 315 between them and the protruding - portion outer wall 310 in the first direction, and are provided at intervals in the vertical direction.

[0093] The guide member 602 has a main body portion that forms the confluence channel 603. As shown by the arrow A20 in Fig. 7, the confluence channel 603 merges the air flowing through the roof exhaust passage 375 into the air flowing through the wall exhaust passage 315 by utilizing the space between a plurality of partition members 601 in the vertical direction. Although detailed illustration is omitted, an upward air flow in which air flows upward is formed in the wall exhaust passage 315.

[0094] The protrusion-side base material 604 is disposed between the inner wall 370 of the protrusion and the plurality of partition members 601 in the first direction, and forms a roof exhaust passage 375 between it and the inner wall 370 of the protrusion. The protrusion-side base material 604 has a base material opening 604M that allows the above-mentioned confluence channel 603 to penetrate the protrusion-side base material 604 in the first direction.

[0095] According to the protrusion 600 having the above configuration, the air flowing through the wall exhaust passage 315 and the air flowing through the roof exhaust passage 375 can be merged. In this way, the air existing in the plurality of roof ventilation passages 50 can be drawn into the upward air flow of the wall exhaust passage 315 via the roof exhaust passage 375. As a result, the air existing in the plurality of roof ventilation passages 50 can be efficiently discharged into the outdoor space OS together with the upward air flow.

[0096] Also, from the viewpoint of merging the air flowing through the wall exhaust passage 315 and the air flowing through the roof exhaust passage 375, the configuration of the protrusion 700 shown in Fig. 8 can also be adopted. In the protrusion-side base material 701 of the protrusion 700 shown in Fig. 8, a base material opening 701M is formed that allows the air flowing through the roof exhaust passage 375 to pass through the protrusion-side base material 701 in the first direction and merge into the air flowing through the wall exhaust passage 315.

[0097] (3) FIG. 9 is a front cross-sectional view of the protrusion 800 according to the fourth modified embodiment of the present disclosure. Instead of the protrusion 300 according to the previous embodiment, the building 1 may include the protrusion 800 shown in FIG. 9. As shown in FIG. 9, the protrusion 800 according to the present modified embodiment has an extension wall 801, an intermediate wall 802, and another guide member 803. The extension wall 801 has a lower end connected to the upper end of the inner wall 370 of the protrusion, and extends in the vertical direction. The intermediate wall 802 is disposed between the extension wall 801 and one convex portion 392 of the cover member 390 in the first direction, forms a gap GA through which air flows in the vertical direction between the extension wall 801 in the first direction, and forms a third gap G3 between the one convex portion 392 in the first direction. Although detailed illustration is omitted, an upward airflow in which air flows upward is formed in the gap GA. The another guide member 803 has a main body portion that forms a guide path 804 for guiding the air flowing through the roof exhaust path 375 to the gap GA by communicating the roof exhaust path 375 with the above gap GA, and is attached to the extension wall 801.

[0098] As shown by the arrow A21 in FIG. 9, in the protrusion 800, the air flowing through the roof exhaust path 375 merges with the upward airflow formed in the gap GA through the guide path 804 of the another guide member 803, flows from the gap GA to the space P under the cover and the third gap G3, and is discharged to the outdoor space OS.

[0099] Even in a building including the protrusion 800 having the above configuration, the same effects as those of the building 1 according to the previous embodiment can be obtained.

[0100] Further, according to a building including the protrusion 800 having the above configuration, the air existing in the plurality of roof ventilation paths 50 can be drawn into the upward airflow in the gap GA through the roof exhaust path 375. In this way, the air existing in the plurality of roof ventilation paths 50 can be efficiently discharged to the outdoor space OS together with the upward airflow.

[0101] (4) In the previous embodiment, the building 1 provided with the second roof heat insulating member 80 has been described. However, the second roof heat insulating member 80 is not essential. However, from the viewpoint of suppressing the occurrence of so-called summer condensation, it is preferable that the building 1 is provided with the second roof heat insulating member 80.

[0102] (5) In the previous embodiment, an example in which the first roof heat insulating member 40, the second roof heat insulating member 80, the first auxiliary heat insulating member 60, the second auxiliary heat insulating member 90, the first wall heat insulating member 140, and the second wall heat insulating member 180 are made of a rigid heat insulating material such as extruded polystyrene foam has been described. However, these may be made of a fibrous heat insulating material such as cellulose fiber, rock wool, or glass wool. Further, each of the above heat insulating members may be made of foamed urethane such as phenolic foam. Furthermore, each of the above heat insulating members may be provided by spraying on the building 1.

[0103] (6) In the previous embodiment, an example in which the first roof ventilation path 51 to the sixth roof ventilation path 56 are formed in the building 1 has been described. However, there may be only one roof ventilation path. That is, in the building 1 according to the previous embodiment, the fourth support member 34 to the eighth support member 38 are not essential, and a single roof ventilation path may be formed inside the first support member 31, the second support member 32, the third support member 33, and the fourth support member 34.

[0104] (7) The present invention is not limited to the roof structure according to the previous embodiment. It can be applied to known roof balconies, full flat balconies, etc. In this case, the structure of the portion that communicates the roof ventilation path and the exhaust path of the protruding portion with each other may be appropriately changed.

[0105] (8) In the previous embodiment, an example in which the wall exhaust passage 315 indirectly communicates the wall ventilation passage 115 and the outdoor space OS has been described. However, the wall exhaust passage 315 may directly communicate the wall ventilation passage 115 and the outdoor space OS. That is, the wall exhaust passage 315 may be interposed between the wall ventilation passage 115 and the outdoor space OS such that air flows from the wall ventilation passage 115 to the wall exhaust passage 315 without passing through other spaces, and air flows from the wall exhaust passage 315 to the outdoor space OS without passing through other spaces.

[0106] Further, in the previous embodiment, an example in which the roof exhaust passage 375 indirectly communicates the plurality of roof ventilation passages 50 and the outdoor space OS has been described. However, the roof exhaust passage 375 may directly communicate the plurality of roof ventilation passages 50 and the outdoor space OS. That is, the roof exhaust passage 375 may be interposed between the plurality of roof exhaust passages 375 and the outdoor space OS such that air flows from the plurality of roof ventilation passages 50 to the roof exhaust passage 375 without passing through other spaces, and air flows from the roof exhaust passage 375 to the outdoor space OS without passing through other spaces.

[0107] (9) In the previous embodiment, an example in which the plurality of support members 30 are arranged on the upper surfaces of the plurality of beams 20 has been described. That is, an example in which the plurality of support members 30 and the plurality of beams 20 are in contact with each other has been described. However, the plurality of support members 30 and the plurality of beams 20 do not necessarily have to be in contact with each other. The plurality of support members 30 may be arranged above (upper side, upward) the plurality of beams 20 as long as the beam space S2 between the roof member 11 and the plurality of beams 20 in the vertical direction can be formed between the roof member 11. Therefore, for example, a predetermined member may be interposed between the plurality of support members 30 and the plurality of beams 20 in the vertical direction.

[0108] (10) In the previous embodiment, an example in which the plurality of support members 30 are composed of the first support member 31 to the ninth support member 39 has been described. However, the configuration of the plurality of support members 30 is not limited to this and can be changed as appropriate. For example, instead of the first support member 31 and the second support member 32, the plurality of support members 30 may have a first alternative support member and a second alternative support member. The first alternative support member is disposed between the third support member 33 to the ninth support member 39 and the first beam 21 in the vertical direction so as to support one end of each of the third support member 33 to the ninth support member 39 in the first direction from below, and extends in the second direction. The second alternative support member is disposed between the third support member 33 to the ninth support member 39 and the third beam 23 in the vertical direction so as to support the other end of each of the third support member 33 to the ninth support member 39 in the first direction from below, and extends in the second direction. In this example, the third support member 33 to the ninth support member 39 correspond to the "plurality of support members" according to the present invention.

[0109] In a building having the above configuration, the same effects as those of the building 1 according to the previous embodiment can be obtained.

[0110] (11) The building 1 may not include some of the components described in the previous embodiment. For example, the building 1 may not include the frame body 210. In addition, the configuration of the building 1 can be changed as appropriate without departing from the gist of the present invention.

[0111] Note that the above-described specific embodiments mainly include inventions having the following configurations.

[0112] The building according to the first invention includes a roof member extending in a horizontal direction, side wall portions extending in the vertical direction so as to define a wall ventilation passage through which air flows in the vertical direction, a protruding portion disposed so as to protrude upward from the roof member and connecting the roof member and the side wall portions, a plurality of beams disposed below the roof member and extending in at least one of a horizontal first direction and a horizontal second direction intersecting each of the first direction and the vertical direction, each having an upper end portion that supports the roof member from below so that a space is formed between the roof member and the plurality of beams in the vertical direction, a plurality of support members disposed on the plurality of beams and extending in at least one of the first direction and the second direction, and a first heat insulating member having an upper surface disposed at an interval below the roof member so as to form a roof ventilation passage through which air flows in at least one of the first direction and the second direction between the roof member and the space, and surrounded by the plurality of support members. The roof ventilation passage has an air inlet, an air outlet, and a connecting passage connecting the air inlet and the air outlet. The portion from the air inlet to the air outlet is disposed between the roof member and the first heat insulating member in the vertical direction. The protruding portion has an exhaust passage communicating each of the outlet of the roof ventilation passage and the outlet of the wall ventilation passage with the outdoor space.

[0113] According to a second invention, in the building according to the first invention, openings may be formed in at least some of the plurality of support members to allow air flowing through the roof ventilation passage to pass through the some of the support members.

[0114] According to a third invention, in the building according to the first or second invention, a ceiling space is formed between the first heat insulating member in the vertical direction, and a ceiling member is disposed at an interval below the first heat insulating member so as to partition the ceiling space and an indoor space below the ceiling space. A roof moisture-proof line may be further provided along the lower surface of the first heat insulating member to prevent moisture passing through the ceiling member from the indoor space from reaching the first heat insulating member.

[0115] The fourth invention may further include a second heat insulating member disposed below the first heat insulating member so as to sandwich the roof moisture-proof line from above and below between the second heat insulating member and any one of the first to third inventions in the building according to any one of the first to third inventions.

Explanation of Signs

[0116] 1, 1A: Building 11: Roof material 20, 20A: Plural beams 30, 30A: Plural support members 30a: Upper end portion 32C: Notch 40: Roof-side first heat insulating member (an example of the first heat insulating member) 40a: Upper surface 40b: Lower surface 50: Plural roof ventilation paths 70: Roof moisture-proof line 80: Roof-side second heat insulating member (an example of the third heat insulating member) 100: Ceiling member 110: Side wall portion 115: Wall ventilation path 315: Wall exhaust path (an example of the exhaust path) 375: Roof exhaust path (an example of the exhaust path) EN: Air inlet EX: Air outlet CN: Connection path OS: Outdoor space RM2: Second indoor space (an example of the indoor space) S1: Attic space S2: Space above the beam S3: Ceiling cavity

Claims

1. a roof member extending in a horizontal direction; a side wall portion extending in the vertical direction so as to define a wall ventilation passage through which air flows in the vertical direction; a protruding portion disposed so as to protrude upward from the roof member and connecting the roof member and the side wall portion; a plurality of beams disposed below the roof member and extending in at least one of a horizontal first direction and a horizontal second direction intersecting each of the first direction and the vertical direction; each having an upper end portion that supports the roof member from below so that a space is formed between the roof member and the plurality of beams in the vertical direction, and being respectively disposed on the plurality of beams and extending in at least one of the first direction and the second direction; a plurality of support members; a first heat insulating member having an upper surface disposed at an interval below the roof member so as to form a roof ventilation passage through which air flows in at least one of the first direction and the second direction between the space and the roof member, and surrounded by the plurality of support members; the roof ventilation passage has an air inlet, an air outlet, and a connection path connecting the air inlet and the air outlet, and is disposed between the roof member and the first heat insulating member in the vertical direction from the air inlet to the air outlet; the protruding portion has an exhaust passage communicating each of the outlet of the roof ventilation passage and the outlet of the wall ventilation passage with the outdoor space; a building.

2. At least some of the plurality of support members are formed with openings that allow air flowing through the roof ventilation passage to pass through the some of the support members. The building according to claim 1.

3. a ceiling member disposed at an interval below the first heat insulating member so as to form a ceiling space between the first heat insulating member in the vertical direction and partitioning the ceiling space and an indoor space below the ceiling space; further comprising a roof moisture-proof line disposed along the lower surface of the first heat insulating member to prevent moisture passing through the ceiling member from the indoor space from reaching the first heat insulating member. The building according to claim 1 or 2.

4. further comprising a second heat insulating member disposed below the first heat insulating member so as to sandwich the roof moisture-proof line from above and below between the first heat insulating members. The building according to claim 3.

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