Shed roof structure for building

Abstract

Provided is a shed roof structure which is for a building and which is capable of improving the performance of ventilation through a ridge part of a shed roof while suppressing the occurrence of condensation in the vicinity the ridge part. A building (1) has an under-roof ventilation path (4A), a rear side air discharge path (5A), and an upper side air discharge path (5B). The upper side air discharge path (5B) is formed by a cover unit (5S) which is disposed above a sheathing (40). Formed between a cover inclined part (5S1) and a cover side wall part (5S2) of the cover unit (5S) is an inner space (P) which has an acute angle. A blockage member (5V) prevents air which flows through the rear side air discharge path (5A) and the upper side air discharge path (5B) from entering the inner space (P).

Description

Title of Invention SHED ROOF STRUCTURE FOR BUILDING Technical Field

[0001] The present invention relates to a shed roof structure of a building. Background Art

[0002] Conventionally, a building having a shed roof inclined to one side is known.

[0003] Patent Literatures 1 and 2 disclose a building in which a ventilation structure is provided in a ridge part of the shed roof. Specifically, in the technique, a bent cover member (ridge wrapping) is attached to the ridge part of the roof. The cover member includes an inclined portion inclined forward and downward and a back surface portion extending downward from a rear end of the inclined portion, and the inclined portion and the back surface portion are connected at a bent portion having an acute angle. Then, the inclined portion of the cover member is arranged to be offset upward with respect to the roof of the building, and the back surface portion of the cover member is arranged to be offset backward with respect to a rear wall of the building, whereby an exhaust port is formed on each of a front side and a rear side of the cover member. An air passage is formed inside the shed roof, and the air rising along the air passage is discharged to the outdoors from the exhaust port. Citation List Patent Literature

[0004] Patent Literature 1: JP 2012-241442 A Patent Literature 2: JP 2015-068095 A

[0005] In the techniques described in Patent Literatures 1 and 2, an inner space formed in the bent portion of the cover member serves as a path for air, but air tends to stay in the inner space formed in an acute shape. In particular, when air containing a large amount of moisture flows into and stays in the inner space in winter, there is a problem that dew condensation is likely to occur at the bent portion. Summary of Invention

[0006] An object of the present invention is to provide a shed roof structure of a building capable of improving ventilation performance through a ridge part of a shed roof while suppressing generation of dew condensation around the ridge part.

[0007] Provided by the present invention is a shed roof structure of a building. The shed roof structure includes a ridge part, a roof member disposed so as to be inclined upward toward the ridge part, a side wall extending along a vertical direction toward the ridge part, a ventilation path formed upward along the roof member below the roof member, a first exhaust passage that communicates with the ventilation path and allows air flowing along the ventilation path to be exhausted to outdoors above the roof member, a second exhaust passage that communicates with the ventilation path and allows air flowing along the ventilation path to be exhausted to the outdoors beyond the side wall, a cover part disposed to cover the ridge part, the cover part including a cover inclined portion disposed to be inclined above the roof member and forming the first exhaust passage, and a cover side wall portion disposed to extend in the vertical direction above the side wall and forming an acute inner space with the cover inclined portion, and a blockage member that blocks entry of air flowing through each of the first exhaust passage and the second exhaust passage into the inner space. Brief Description of Drawings

[0008] FIG. 1 is a schematic side view of a building according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the vicinity of a ridge part of a building according to an embodiment of the present invention. FIG. 3 is an enlarged cross-sectional view in which a part of FIG. 2 is enlarged. FIG. 4 is a side view of a drainer according to the embodiment of the present invention. FIG. 5 is a front view of the drainer according to the embodiment of the present invention. FIG. 6 is a side view of a mounting bracket according to the embodiment of the present invention. FIG. 7 is a front view of the mounting bracket according to the embodiment of the present invention. FIG. 8 is an enlarged cross-sectional view of a ridge part of a building according to a modified embodiment of the present invention. Description of Embodiments

[0009] Hereinafter, a building 1 according to each embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic side view of a building 1 according to an embodiment of the present invention. Note that, in each of the subsequent drawings including FIG. 1, a front-back direction, a left-right direction, and a vertical direction are illustrated as necessary for ease of description, but these directions do not limit the present invention.

[0010] As illustrated in FIG. 1, the building 1 includes a front wall 2, a rear wall 3, a roof 4, and a ridge part 5. The front wall 2 is a wall extending in the vertical direction on the front side of the building 1. Similarly, the rear wall 3 is a wall extending in the vertical direction on the rear side of the building 1. The upper end of the rear wall 3 is disposed at a position higher than an upper end of the front wall 2. The roof 4 connects the upper end of the front wall 2 and the upper end of the rear wall 3 and covers the inside of the building 1. The ridge part 5 is a top portion and an upper end of the roof 4, and horizontally extends in a left-right direction orthogonal to the paper surface of FIG. 1. In the present embodiment, the roof 4 has a so-called shed roof structure inclined upward toward the ridge part 5. Note that the ridge part 5 may not be horizontal but may extend so as to be inclined along a direction orthogonal to FIG. 1.

[0011] As illustrated in FIG. 1, a front wall air passage 2A is formed inside the front wall 2, and a rear wall air passage 3 A is formed inside the rear wall 3. Further, an underroof air passage 4A (ventilation path, exhaust path) is formed inside the roof 4. In the present embodiment, air in the front wall air passage 2A flows into the underroof air passage 4A and flows toward the ridge part 5. Similarly, the air in the rear wall air passage 3 A rises toward the ridge part 5. These air is exhausted to the outdoors in the ridge part 5. Hereinafter, these exhaust structures will be described in detail.

[0012] FIG. 2 is a cross-sectional view of the periphery of the ridge part 5 of the building 1, and FIG. 3 is an enlarged cross-sectional view in which a part of FIG. 2 is enlarged.

[0013] As illustrated in FIG. 2, the building 1 includes an outer wall 30 (side wall), a heat insulating material 31, a base wood 32, base bars 33, and a ridge beam 9. The outer wall 30 is a wall member constituting the rear wall 3. The outer wall 30 extends along the vertical direction toward the ridge part 5.

[0014] The heat insulating material 31 is disposed inside the outer wall 30. The heat insulating material 31 may be a soft heat insulating material or a hard heat insulating material, and both the hard heat insulating material and the soft heat insulating material may be used. In addition, the heat insulating material 31 may be a foamable heat insulating material. The same applies to a heat insulating material described later.

[0015] The base wood 32 is a wood material disposed above the heat insulating material 31. The base bars 33 are wood materials disposed to be interposed between the base wood 32 and the outer wall 30. Note that the base bars 33 are intermittently disposed in a direction orthogonal to the sheet plane of FIG. 2. On the inner side of the heat insulating material 31, the ridge beam 9 extends along a direction orthogonal to the paper surface. Further, a rear wall air passage 3A is formed between the outer wall 30 and the heat insulating material 31 along the vertical direction.

[0016] Referring to FIGS. 2 and 3, the building 1 further includes a sheathing roof board 40, a heat insulating material 41, a plurality of roof tiles 42, a roofing 43, and a roofing splice plate 44.

[0017] The sheathing roof board 40 corresponds to a roof member in the present embodiment. The sheathing roof board 40 is disposed so as to be inclined upward toward the ridge part 5. The sheathing roof board 40 is constituted by, for example, a wooden board. Note that a distal end (upper end) of the sheathing roof board 40 is defined as a sheathing roof board distal end 40S.

[0018] The heat insulating material 41 is disposed below the sheathing roof board 40 at an interval. Note that, although not illustrated in FIG. 2, the sheathing roof board 40 is supported by a plurality of rafter members arranged at intervals in a direction orthogonal to the paper surface of FIG. 2. Each rafter member is disposed so as to extend upward along the sheathing roof board 40. Further, the heat insulating material 41 is disposed between adjacent rafter members. Note that, in FIG. 2, a moisture-proof sheet is disposed in an indoor-side region indicated by a broken line W, and a moisture-permeable waterproof sheet is disposed in an outdoor-side region indicated by a broken line W.

[0019] The plurality of roof tiles 42 are arranged on the sheathing roof board 40. Note that, although one roof tile 42 is illustrated in FIG. 2, a plurality of roof tiles 42 are arranged side by side along the roof 4 of FIG. 1.

[0020] The roofing 43 prevents rainwater from entering a sheathing roof board opening 4011 described in detail later. In the present embodiment, the roofing splice plate 44 constituted by a metal plate is disposed on the sheathing roof board 40 in advance, and the roofing 43 is disposed along the roofing splice plate 44.

[0021] Referring to FIGS. 2 and 3, the building 1 further includes a first support member 50, a second support member 52, a base plate 54, a watertight material 56, a drainer 58, a watertight material 60, a drainer 62, a roofing 64 (waterproof member), a mounting bracket 66, a cover member 68, a base wood 70 (FIG. 2), a base plate 72, a gable member 74, and a base wood 76.

[0022] The first support member 50 and the second support member 52 are disposed to attach a cover unit 5 S to be described later. In other words, these support members function as a raising member for forming an air exhaust passage above the sheathing roof board 40. The second support member 52 has a substantially U-shaped cross section. The first support member 50 is disposed so as to overlap the second support member 52, and a front end thereof is inclined and extends long forward. A mounting bracket 66 to be described later and the like are supported by the front end. The first support member 50 is fixed to the second support member 52 by a fixing bolt VI (FIG. 3), and the second support member 52 is fixed to the sheathing roof board 40 by a fixing means (not illustrated).

[0023] As illustrated in FIG. 3, the base plate 54 and the watertight material 56 are disposed so as to be vertically sandwiched between the front end of the first support member 50 and the roof tile 42. The first support member 50 and the base plate 54 are fixed by a nail V2 (FIG. 3). Further, a rear end of the watertight material 56 also biases the above-described roofing 43 and the roofing splice plate 44 toward the second support member 52.

[0024] The drainer 58 is constituted by a metal plate and has a shape bent at a plurality of positions as illustrated in FIG. 3. The drainer 58 includes a distal end 58A and a folded portion 58B that is bent to be inclined upward. The distal end 58A is a distal end (front end) of the drainer 58, and the watertight material 60 is supported on a lower surface thereof. The watertight material 60 is biased to the roof tile 42 on the front side of the watertight material 56, and prevents, together with the watertight material 56, rainwater or the like blowing up along the surface of the roof tile 42 from entering the sheathing roof board opening 40H. The folded portion 58B prevents rainwater or the like flowing in from a cover opening 68H from entering the sheathing roof board opening 40H.

[0025] The drainer 62 is constituted by a metal plate disposed to cover an upper side of the first support member 50, and may be made of resin as a matter of course. FIG. 4 is a side view of the drainer 62 according to the present embodiment. FIG. 5 is a front view of the drainer 62. The drainer 62 includes a main body 62A and a distal end 62B. The main body 62A has a function of covering an upper side of the sheathing roof board opening 40H and has a function of holding a shape of a roofing 64 described later. The distal end 62B has a shape in which the distal end side of the main body 62A is bent downward. As illustrated in FIG. 5, a plurality of slits 62H arranged at intervals in the left-right direction is formed in the distal end 62B. Each slit 62H has a shape extending long in the left-right direction. Each slit 62H forms a part of an upper exhaust passage 5B to be described later. Note that the folded portion 58B of the drainer 58 and the distal end 62B of the drainer 62 described above form a drainer structure capable of forming a ventilation path.

[0026] The roofing 64 prevents rainwater from entering the building 1 from the sheathing roof board opening 40H or the like. The roofing 64 is constituted by a sheet material having waterproof performance. As illustrated in FIG. 2, the roofing 64 has a roofing inclined portion 64A and a roofing back portion 64B.

[0027] The mounting bracket 66 is disposed so as to cover an upper side of the base plate 54, the drainer 58, and the first support member 50 described above. FIG. 6 is a side view of the mounting bracket 66 according to the present embodiment. FIG. 7 is a front view of the mounting bracket 66 according to the present embodiment. As illustrated in FIG. 7, the mounting bracket 66 has a predetermined width in the left-right direction. Note that, although not illustrated in FIGS. 2 and 3, a plurality of mounting brackets 66 are arranged at intervals in the left-right direction. The mounting bracket 66 includes a bracket front portion 66A, a bracket rear portion 66B, a pair of bracket screw holes 66FI, and a bracket engaging portion 66S. The bracket front portion 66A biases the drainer 58 and the base plate 54 from above. The bracket rear portion 66B biases the drainer 62 and the roofing 64 from above. The pair of bracket screw holes 66H is a pair of left and right holes formed between the bracket front portion 66A and the bracket rear portion 66B. The mounting bracket 66 is fixed to the base plate 54 and the base wood 76 by fixing screws V3 (FIG. 3) and V7 (FIG. 2) inserted into the respective bracket screw holes 66H. The bracket engaging portion 66S is a recess formed at a distal end of the bracket front portion 66A, and a covei' locking portion 68S of the cover member 68 described later is engaged with the bracket engaging portion 66 S.

[0028] The cover member 68 functions as a decorative plate that forms the appearance of the building 1 above the ridge part 5. The cover member 68 includes a cover upper portion 68A and a cover rear portion 68B (FIG. 2). The cover upper portion 68A covers the mounting bracket 66 and the roofing inclined portion 64A of the roofing 64 from above. The cover locking portion 68S disposed at a distal end of the cover upper portion 68A is engaged with the bracket engaging portion 66S (FIG. 6), whereby the front side portion of the roofing 64 is fixed. On the other hand, the cover rear portion 68B is fixed to the base plate 72 described later by a fixing screw V4 (FIG. 2).

[0029] The base wood 70 (FIG. 2) is a plate constituted by a parallelogram in a cross-sectional view. A lower surface of the base wood 70 is placed on the sheathing roof board distal end 40S of the sheathing roof board 40. Further, an upper surface of the base wood 70 supports the cover member 68 from below. In other words, the base wood 70 has a function of holding the inclination angle of the cover upper portion 68A of the cover member 68 in parallel (substantially parallel) with the sheathing roof board 40. Further, the base wood 70 is disposed so as to fill a part of an inner space P formed inside the roofing 64.

[0030] The base plate 72 is disposed behind the base wood 70 so as to be in close contact with the base wood 70. The base plate 72 has a substantially trapezoidal shape in a cross-sectional view, and a distal end (upper end) thereof has an inclination along an upper surface portion of the base wood 70. Further, a rear end of the drainer 62 is fixed to the base plate 72 by a nail V6 (FIG. 2). A lower portion of the base plate 72 extends downward from the sheathing roof board distal end 40S of the sheathing roof board 40. The base plate 72 has a function of supporting the cover rear portion 68B of the cover member 68 along a horizontal direction. Further, the base plate 72 is disposed so as to fill a part of the inner space P formed by the roofing 64.

[0031] The gable member 74 is disposed below the cover member 68 so as to partially overlap the cover rear portion 68B of the cover member 68. The gable member 74 is fixed to the base plate 72 by a nail V5 (FIG. 2). The gable member 74 has a function of forming a rear exhaust passage 5A.

[0032] The base wood 76 is disposed in close contact with the base wood 70 on the front side of the base wood 70. The base wood 76 extends long in a direction orthogonal to the paper surface of FIGS. 2 and 3, and the drainer 62 is fixed to the base plate 72 and the base wood 76 by a nail V7 (FIG. 2). Note that the base wood 76 may be integrated with the base wood 70.

[0033] The underroof air passage 4A in FIG. 1 is formed upward along the sheathing roof board 40 below the sheathing roof board 40. Then, the underroof air passage 4A branches into a rear exhaust passage 5A (second exhaust passage) and an upper exhaust passage 5B (first exhaust passage) at a branch portion S in FIGS. 2 and 3. The rear exhaust passage 5A communicates with the underroof air passage 4A, and enables air flowing along the underroof air passage 4A to be discharged to the outdoors above the sheathing roof board 40. The upper exhaust passage 5B communicates with the underroof air passage 4A, and enables air flowing along the underroof air passage 4A to be exhausted to the outdoors beyond the outer wall 30.

[0034] The rear exhaust passage 5 A extends along the sheathing roof board distal end 40S of the sheathing roof board 40 behind the branch portion S, and then extends so as to be bent downward by the sheathing roof board distal end 40S and the base plate 72. Thereafter, the rear exhaust passage 5 A extends rearward, extends downward on the rear side of the outer wall 30 through the gable member 74, and then communicates with the outdoors. As illustrated in FIG. 2, the rear wall air passage 3A formed inside the outer wall 30 is guided rearward by the gable member 74 at an upper end of the outer wall 30, extends downward similarly to the rear exhaust passage 5A, and then communicates with the outdoors.

[0035] On the other hand, the upper exhaust passage 5B communicates with the underroof air passage 4A through the sheathing roof board opening 40H formed in the sheathing roof board 40. The flow of air flowing into the upper exhaust passage 5B passes between the folded portion 58B of the drainer 58 and the drainer 62, further passes through the slit 62H, and is exhausted to the outdoors from the cover opening 68H of the cover member 68.

[0036] Note that the roofing 64, the mounting bracket 66, and the cover member 68 constitute a cover unit 5S (cover part) in the present embodiment. The cover unit 5S is disposed so as to cover the ridge part 5. The cover unit 5S includes a cover inclined portion 5S1 (unit inclined portion) and a cover side wall portion 5S2 (unit side wall portion). The cover inclined portion 5S1 is disposed to be inclined above the sheathing roof board 40, and forms the upper exhaust passage 5B. Further, the cover side wall portion 5S2 is disposed above the outer wall 30 so as to extend in the vertical direction, and forms the acute inner space P with the cover inclined portion 5S1 inside the ridge part 5. Further, the above-described roofing 64 is continuously arranged from the cover inclined portion 5S1 to the cover side wall portion 5S2 so as to cover the inner space P. The roofing inclined portion 64A of the roofing 64 constitutes an inner wall surface of the cover inclined portion 5S1 of the cover unit 5S, and the roofing back portion 64B constitutes an inner wall surface of the cover side wall portion 5S2. The mounting bracket 66 has a function of holding the shape of the roofing 64 having a triangular shape in a side view.

[0037] In the present embodiment, the base wood 70 and the base plate 72 function as a blockage member 5V. The blockage member 5 V blocks air flowing through each of the rear exhaust passage 5A and the upper exhaust passage 5B from entering the inner space P. In the shed roof structure as illustrated in FIG. 1, air flowing through the ventilation path along the sheathing roof board 40 can be exhausted from each of the upper exhaust passage 5B above the sheathing roof board 40 and the rear exhaust passage 5A on the outer wall 30 side. The air flowing into the underroof air passage 4A from the front wall air passage 2A in FIG. 1 may contain a lot of moisture. In such a case, for example, even if the north wind blows into the rear exhaust passage 5 A from the outside through the gable member 74 and the exhaust function from the upper exhaust passage 5B is reduced, the air is exhausted from the upper exhaust passage 5B, whereby stagnation and dew condensation of the air around the rear exhaust passage 5A are prevented. On the other hand, in order to provide the cover unit 5S above the sheathing roof board 40 in order to form such an upper exhaust passage 5B, the cover inclined portion 5S1 of the cover unit 5S needs to be arranged offset upward with respect to the sheathing roof board 40. Furthermore, in order to suitably maintain the appearance of the building 1, it is desirable that the cover inclined portion 5S1 is disposed to be inclined similarly to the sheathing roof board 40, and the cover side wall portion 5S2 is disposed to extend in the vertical direction along the outer wall 30. In this case, the acute inner space P is formed by the cover inclined portion 5S1 and the cover side wall portion 5S2 of the cover unit 5S, in other words, the roofing inclined portion 64 A and the roofing back portion 64B of the roofing 64.

[0038] Assuming that the inner space P is an air path, the air flow tends to be stagnant due to the shape. However, in the present embodiment, since the blockage member 5V including the base wood 70 and the base plate 72 prevents the air flowing through each of the rear exhaust passage 5A and the upper exhaust passage 5B from entering the inner space P, it is possible to suppress stagnation of the air and generation of dew condensation in the inner space P. Further, since the inner space P does not become a path for air, the air in the underroof air passage 4A can be efficiently exhausted from the rear exhaust passage 5A and the upper exhaust passage 5B. Note that the function of blocking the entry of air is not limited to completely blocking the flow of air. Even if the main air flow is blocked, it is possible to suppress air stagnation and dew condensation in the inner space P. Note that a sealing agent or the like may be applied around the base wood 70 and the base plate 72 to more completely block the flow of air.

[0039] Note that, as illustrated in FIG. 2, in the present embodiment, since the sheathing roof board distal end 40S of the sheathing roof board 40 is disposed in close contact with the base plate 72, the sheathing roof board distal end 40S also functions as the blockage member 5V.

[0040] Further, in the present embodiment, the base wood 70 is disposed so as to fill at least a part of the inner space P, and further supports the cover inclined portion 5S1 from below. In this manner, by reducing the volume into which air can enter in the inner space P, it is possible to further suppress stagnation of air and generation of dew condensation in the inner space P. Further, the cover inclined portion 5S1 of the cover unit 5S can be stably supported using the base wood 70 as the blockage member 5V.

[0041] Furthermore, in the present embodiment, the base plate 72 is disposed so as to fill at least a part of the inner space P, and further supports the cover side wall portion 5S2 along the horizontal direction. Even in such a configuration, by reducing the volume into which air can enter in the inner space P, it is possible to further suppress stagnation of air and generation of dew condensation in the inner space P. Further, the cover side wall portion 5S2 of the cover unit 5S can be stably supported using the base plate 72 as the blockage member 5 V.

[0042] Furthermore, in the present embodiment, the base plate 72 defines a part of the rear exhaust passage 5 A below the sheathing roof board distal end 40S of the sheathing roof board 40. Accordingly, the base plate 72 can prevent the air flowing through the rear exhaust passage 5A from entering the inner space P, and a part of the rear exhaust passage 5A can be defined using the base plate 72. Therefore, the number of components for forming the rear exhaust passage 5A can be reduced.

[0043] Further, in the present embodiment, the sheathing roof board 40 has the sheathing roof board opening 40H (roof opening). The sheathing roof board opening 40H is formed in the sheathing roof board 40 so that the air flowing through the underroof air passage 4A can flow into upper exhaust passage 5B. Further, the cover opening 68FI (exhaust port) is formed in the cover inclined portion 5S1 (cover upper portion 68A) of the cover unit 5S. The cover opening 68H is disposed on the opposite side of the inner space P as viewed from the sheathing roof board opening 40H, and enables the air flowing into the upper exhaust passage 5B from the sheathing roof board opening 40FI to be exhausted to the outdoors.

[0044] With such a configuration, the air flowing through the underroof air passage 4A flows into the upper exhaust passage 5B from the sheathing roof board opening 40H, and then is exhausted to the outdoors from the cover opening 68H defined by the cover inclined portion 5S1. At this time, since the base wood 70 prevents the air in the upper exhaust passage 5B from flowing into the inner space P, the air can be smoothly exhausted from the cover opening 68H.

[0045] Note that the blockage member 5V (base wood 70 and base plate 72) is desirably disposed in a region of the inner space P higher than an upper end of the cover opening 68H (see the broken line in FIG. 2) so as to prevent the air flowing through the upper exhaust passage 5B from entering.

[0046] When the air flowing into the upper exhaust passage 5B flows into a region higher than the upper end of the cover opening 68H in the inner space P, stagnation of the air is likely to occur, and the exhaust efficiency from the cover opening 68H is likely to be reduced. With the configuration as described above, since the air is prevented from flowing into the region higher than the upper end of the cover opening 68H in the inner space P by the blockage member 5 V, it is possible to further suppress the stagnation of the air in the inner space P.

[0047] Furthermore, in the present embodiment, the cover unit 5S disposed above the sheathing roof board 40 to form the upper exhaust passage 5B includes the roofing 64. The roofing 64 is constituted by the roofing inclined portion 64A and the roofing back portion 64B that are continuously arranged to cover above the sheathing roof board opening 40H and above and behind the inner space P. Accordingly, rainwater can be stably prevented from entering the periphery of the inner space P. As a result, in addition to dew condensation around the inner space P, rain leakage of the building 1 and corrosion of the sheathing roof board 40, the blockage member 5V, and the like can be reliably suppressed.

[0048] Further, in the present embodiment, the roofing 43 is disposed in front of the sheathing roof board opening 40H, while the roofing 64 is disposed above the sheathing roof board opening 40H. Then, the air in the upper exhaust passage 5B is exhausted to the outdoors using the space between the roofing 43 and the roofing 64. Even with the configuration in which the two roofings (waterproof members) are disposed at intervals as described above, it is possible to prevent rainwater from entering the sheathing roof board opening 40H by the cover unit 5S, the drainer 58, the drainer 62, and the like in addition to the roofing 43 and the roofing 64. Further, as described above, since the cover unit 5S includes the roofing 64 continuously disposed over the cover inclined portion 5S1 and the cover side wall portion 5S2, it is possible to maintain high waterproof performance around the ridge part 5.

[0049] Although the building 1 according to each embodiment of the present invention has been described above, the present invention is not limited thereto, and for example, the following modified embodiments can be adopted.

[0050] (1) In the embodiment described above, an aspect has been described in which the base wood 70 and the base plate 72 are arranged so as to fill the inner space P, but the present invention is not limited thereto. At least one of the base wood 70 or the base plate 72 may include other members. FIG. 8 is an enlarged cross-sectional view of a ridge part 5 of a building according to a modified embodiment of the present invention. Note that, in the present modified embodiment, differences from the above embodiment will be described, and description of common points will be omitted.

[0051] In the present modified embodiment, the building 1 includes a support member 71 instead of the base plate 72 in FIG. 3. The support member 71 also functions as a blockage member 5V, and is constituted by, for example, a metal plate-like member. As illustrated in FIG. 8, the support member 71 has a Z shape in a cross-sectional view. The support member 71 includes a support portion 71 A, a connection portion 7IB, and a fixing portion 7IC. The support portion 71A connects the connection portion 7IB and the fixing portion 7IC. Further, the support portion 71A is disposed between the upper exhaust passage 5B and the inner space P, and connects the sheathing roof board 40 and the cover inclined portion 5S1 along the vertical direction. The connection portion 71B is connected to the cover inclined portion 5S1 of the cover unit 5S. Further, the fixing portion 71C is fixed to the sheathing roof board distal end 40S of the sheathing roof board 40.

[0052] With such a configuration, it is possible to prevent the air flowing through the upper exhaust passage 5B from entering the inner space P without filling the entire inner space P with other members.

[0053] (2) In the embodiment described above, an aspect has been described in which, as illustrated in FIG. 2, the cover side wall portion 5S2 of the cover unit 5 S is arranged offset rearward with respect to the outer wall 30, but the cover side wall portion 5S2 of the cover unit 5S may be arranged immediately above the outer wall 30 so as to be continuous with the outer wall 30.

[0054] (3) In the embodiment described above, an aspect has been described in which air flows into the upper exhaust passage 5B through the sheathing roof board opening 40H formed in the sheathing roof board 40, but the present invention is not limited thereto. In FIG. 2, the sheathing roof board 40 may not have the sheathing roof board distal end 40S, and the distal end of the sheathing roof board 40 may be disposed in front of the sheathing roof board opening 40H in FIG. 2. In this case, a region including the sheathing roof board opening 40H and the sheathing roof board distal end 40S of FIG. 2 is an opening. Even in such a case, for example, air can be stably prevented from flowing into the inner space P by the base wood 70 and the base plate 72 in FIG. 2.

[0055] (4) In the embodiment described above, an aspect has been described in which the air in the upper exhaust passage 5B is exhausted to the outdoors through the cover opening 68H formed in the cover member 68, but in FIG. 3, the air passing through the slit 62H may further flow forward and then be exhausted to the outdoors through the space between the cover locking portion 68 S and the roof tile 42. In this case, the space constitutes the exhaust port of the present invention. In addition, the exhaust port may be configured by forming a slit similar to the slit 62H at the front end of the cover member 68.

[0056] (5) In the embodiment described above, an aspect has been described in which the rear exhaust passage 5A extends from the branch portion S to the base plate 72 and then bends downward, but by forming an exhaust port (not illustrated) in the base plate 72, the air may linearly extend from the branch portion S along the rear exhaust passage 5 A and then be exhausted to the outdoors as it is. Also in this case, the air is prevented from flowing into the inner space P by the base plate 72. Note that the gable member 74 for forming the exhaust port described above may be attached to the outer wall surface of the base plate 72.

[0057] Note that the above-described specific embodiments of the present invention mainly include inventions having the following configurations. That is, a shed roof structure of a building according to a first aspect of the present invention includes a ridge part, a roof member disposed so as to be inclined upward toward the ridge part, a side wall extending along a vertical direction toward the ridge part, a ventilation path formed upward along the roof member below the roof member, a first exhaust passage that communicates with the ventilation path and allows air flowing along the ventilation path to be exhausted to outdoors above the roof member, a second exhaust passage that communicates with the ventilation path and allows air flowing along the ventilation path to be exhausted to the outdoors beyond the side wall, a cover part disposed to cover the ridge part, the cover part including a cover inclined portion disposed to be inclined above the roof member and forming the first exhaust passage, and a cover side wall portion disposed to extend in the vertical direction above the side wall and forming an acute inner space with the cover inclined portion, and a blockage member that blocks entry of air flowing through each of the first exhaust passage and the second exhaust passage into the inner space.

[0058] With this configuration, in the shed roof structure, air flowing through the ventilation path along the roof member can be exhausted from each of the first exhaust passage above the roof member and the second exhaust passage on the side wall side. Accordingly, for example, even if the north wind blows into the second exhaust passage from the outside and the exhaust function from the second exhaust passage is reduced, the air is exhausted from the first exhaust passage, whereby stagnation and dew condensation of the air around the second exhaust passage are prevented. On the other hand, in a case where the cover part is provided above the roof member to form such a first exhaust passage, the flow of air is likely to be stagnant in the acute inner space, but the blockage member blocks entry of the air flowing through each of the first exhaust passage and the second exhaust passage into the inner space, so that it is possible to suppress stagnation of air and generation of dew condensation in the inner space. Further, since the inner space does not become a path for air, the air in the ventilation path can be efficiently exhausted from the first exhaust passage and the second exhaust passage.

[0059] In a shed roof structure of a building according to a second aspect of the present invention, in the shed roof structure of a building according to the first aspect, it is desirable that the blockage member is disposed so as to fill at least a part of the inner space, and supports the cover inclined portion from below.

[0060] With this configuration, by reducing the volume into which air can enter in the inner space, it is possible to further suppress stagnation of air and generation of dew condensation in the inner space. Further, the cover inclined portion of the cover part can be stably supported using the blockage member.

[0061] In a shed roof structure of a building according to a third aspect of the present invention, in the shed roof structure of a building according to the first or second aspect, it is desirable that the blockage member is disposed so as to fill at least a part of the inner space, and supports the cover side wall portion along a horizontal direction.

[0062] With this configuration, by reducing the volume into which air can enter in the inner space, it is possible to further suppress stagnation of air and generation of dew condensation in the inner space. Further, the cover side wall portion of the cover part can be stably supported using the blockage member.

[0063] In a shed roof structure of a building according to a fourth aspect of the present invention, in the shed roof structure of a building according to any one of the first to third aspects, it is desirable that the blockage member is disposed between the first exhaust passage and the inner space, and connects the roof member and the cover inclined portion along the vertical direction.

[0064] With this configuration, it is possible to block entry of the air flowing through the first exhaust passage into the inner space without filling the inner space with another member.

[0065] In a shed roof structure of a building according to a fifth aspect of the present invention, in the shed roof structure of a building according to any one of the first to fourth aspects, it is desirable that the blockage member defines a part of the second exhaust passage below the roof member.

[0066] With this configuration, the blockage member can block entry of the air flowing through the second exhaust passage into the inner space, and a part of the second exhaust passage can be defined using the blockage member.

[0067] In a shed roof structure of a building according to a sixth aspect of the present invention, in the shed roof structure of a building according to any one of the first to fifth aspects, it is desirable that the roof member has a roof opening formed to allow air flowing through the ventilation path to flow into the first exhaust passage, and the cover inclined portion is disposed on an opposite side of the inner space as viewed from the roof opening, and defines an exhaust port that enables air flowing into the first exhaust passage from the roof opening to be exhausted to the outdoors.

[0068] With this configuration, the air flowing through the ventilation path flows into the first exhaust passage from the roof opening and then is exhausted to the outdoors from the exhaust port defined by the cover inclined portion. At this time, since the blockage member blocks flow of air in the first exhaust passage into the inner space, the air can be smoothly exhausted from the exhaust port.

[0069] In a shed roof structure of a building according to a seventh aspect of the present invention, in the shed roof structure of a building according to the sixth aspect, it is desirable that the blockage member is disposed so as to block entry of air flowing through the first exhaust passage into a region higher than an upper end of the exhaust port in the inner space.

[0070] When the air flowing into the first exhaust passage flows into a region higher than the upper end of the exhaust port in the inner space, stagnation is likely to occur, and the exhaust efficiency from the exhaust port is likely to be reduced. With the configuration described above, since flow of air into the region higher than the upper end of the exhaust port in the inner space is blocked by the blockage member, stagnation of air in the inner space can be further suppressed.

[0071] In a shed roof structure of a building according to an eighth aspect of the present invention, in the shed roof structure of a building according to any one of the first to seventh aspects, it is desirable that the cover part further includes a waterproof member continuously disposed from the cover inclined portion to the cover side wall portion so as to cover the inner space.

[0072] With this configuration, since the cover part disposed above the roof member to form the first exhaust passage includes the waterproof member, rainwater can be prevented from entering the periphery of the inner space. Accordingly, in addition to dew condensation around the inner space, it is possible to reliably suppress rain leakage of a building and corrosion of the roof member, the blockage member, and the like.

[0073] According to the present invention, there is provided a shed roof structure of a building capable of improving ventilation performance through a ridge part of a shed roof while suppressing generation of dew condensation around the ridge part.

Claims

Claim 1 .A shed roof structure of a building, comprising:a ridge part;a roof member disposed so as to be inclined upward toward the ridge part;a side wall extending along a vertical direction toward the ridge part;a ventilation path formed upward along the roof member below the roof member;a first exhaust passage that communicates with the ventilation path and allows air flowing along the ventilation path to be exhausted to outdoors above the roof member;a second exhaust passage that communicates with the ventilation path and allows air flowing along the ventilation path to be exhausted to the outdoors beyond the side wall;a cover part disposed to cover the ridge part, the cover part including a cover inclined portion disposed to be inclined above the roof member and forming the first exhaust passage, and a cover side wall portion disposed to extend in the vertical direction above the side wall and forming an acute inner space with the cover inclined portion; and .a blockage member that blocks entry of air flowing through each of the first exhaust passage and the second exhaust passage into the inner space.Claim 2.The shed roof structure of a building according to claim 1, wherein the blockage member is disposed so as to fill at least a part of the inner space, and supports the cover inclined portion from below.Claim 3.The shed roof structure of a building according to claim 1 or 2, wherein the blockage member is disposed so as to fill at least a part of the inner space, and supports the cover side wall portion along a horizontal direction.Claim 4.The shed roof structure of a building according to any one of claims 1 to 3, wherein the blockage member is disposed between the first exhaust passage and the inner space, and connects the roof member and the cover inclined portion along the vertical direction.Claim 5.The shed roof structure of a building according to any one of claims 1 to 4, wherein the blockage member defines a part of the second exhaust passage below the roof member.Claim 6.The shed roof structure of a building according to any one of claims 1 to 5, whereinthe roof member has a roof opening formed to allow air flowing through the ventilation path to flow into the first exhaust passage, andthe cover inclined portion is disposed on an opposite side of the inner space as viewed from the roof opening, and defines an exhaust port that enables air flowing into the first exhaust passage from the roof opening to be exhausted to the outdoors.Claim 7. The shed roof structure of a building according to claim 6, wherein the blockage member is disposed so as to block entry of air flowing through the first exhaust passage into a region higher than an upper end of the exhaust port in the inner space.Claim 8.The shed roof structure of a building according to any one of claims 1 to 7, wherein the cover part further includes a waterproof member continuously disposed from the cover inclined portion to the cover side wall portion so as to cover the inner space.

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