Flashing member and roof structure

Abstract

To provide a flashing member capable of improving strength and a roof structure using the flashing member.SOLUTION: A flashing member according to one embodiment comprises a clamping portion provided at an eave of a sheathing roof board, having a protruding bead formed on a front side, and a flat-shaped bent portion that is bent downward on the eave side of the clamping portion. The flashing member is fastened to the sheathing roof board.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a water drainage member and a roof structure using this water drainage member. [Background technology]

[0002] A roofing material is placed on the roofing boards of a house, and rainwater that is received is channeled to the eaves side. A drainage member for the eaves (a scuttle arabesque) is provided on the eaves side of the roofing board, and has the function of guiding rainwater that has flowed over the roofing material to a position beyond the gable board (for example, a rain gutter, etc.) (for example, see Patent Document 1).

[0003] The roof structure includes a sheathing board, vertical bars arranged at a predetermined interval on the sheathing board from the ridge side to the eaves side, and a waterproof sheet installed on the sheathing board. A metal roofing material is installed between the vertical bars. A metal drip-proof member is also installed on the eaves side of the sheathing board and is installed on the underside of the roofing material.

[0004] For example, the roofing material has a planar portion that is laminated to the sheathing board and the guttering member, a wall portion that stands upright along the vertical bars from the side end of the planar portion, and a folded portion that is provided on the eaves side of the planar portion.

[0005] The water drainage member includes a main body that is laminated on the roofing board and a guide piece that is bent downward from the eaves side of the main body. The guide piece has the above-mentioned folded portion disposed thereon. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2009-150089 A Summary of the Invention [Problem to be solved by the invention]

[0007] In the above-mentioned roof structure, the flashing member is fastened to the sheathing board with fastening members such as screws. It is desirable to place the screws near the upper end in order to prevent rainwater from flowing from between the roof material and the flashing member to the sheathing board by capillary action. However, the flashing member is easily deformed by external forces such as wind, and is therefore easily lifted and peeled off from the sheathing board.

[0008] Therefore, an object of the present invention is to provide a water drainage member that can improve strength and a roof structure using this water drainage member. [Means for solving the problem]

[0009] One form of drainage member is provided at the eaves of a sheathing board and comprises a clamping portion having a bead protruding to the front side, and a flat bent portion bent downwardly on the eaves side of the clamping portion, and is fastened to the sheathing board. Effect of the Invention

[0010] According to the present invention, it is possible to provide a water drainage member capable of improving strength and a roof structure using this water drainage member. [Brief description of the drawings]

[0011] [Figure 1] 1 is a vertical cross-sectional view showing a roof structure according to a first embodiment of the present invention. [Diagram 2] FIG. [Diagram 3] Cross-sectional view of the roof structure. [Figure 4] FIG. 4 is a vertical cross-sectional view showing a modified example of the roof structure. [Diagram 5] FIG. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. 6 is a perspective view showing a roof material to be incorporated into a roof structure according to a second embodiment of the present invention. [Figure 9]4 is a perspective view showing the assembly process of a roof structure using the same roof material. FIG. [Figure 10] 4 is a perspective view showing the assembly process of a roof structure using the same roof material. FIG. [Figure 11] FIG. [Figure 12] FIG. 11 is a perspective view showing a roof material to be incorporated into a roof structure according to a third embodiment of the present invention. [Figure 13] 4 is a perspective view showing the assembly process of a roof structure using the same roof material. FIG. [Figure 14] 4 is a perspective view showing the assembly process of a roof structure using the same roof material. FIG. [Figure 15] 4 is a perspective view showing the assembly process of a roof structure using the same roof material. FIG. [Figure 16] FIG. [Figure 17] FIG. 11 is a perspective view showing a roof material to be incorporated into a roof structure according to a fourth embodiment of the present invention. [Figure 18] FIG. 2 is a perspective view showing a main part of a roof structure using the same roof material. [Figure 19] FIG. 4 is a perspective view showing another example of the roof structure. [Figure 20] FIG. 13 is a cross-sectional view showing a state of a roof structure according to a fifth embodiment of the present invention during rainfall. [Figure 21] FIG. 13 is a cross-sectional view showing a state of a roof structure according to a sixth embodiment of the present invention during rainfall. [Figure 22] FIG. 11 is a perspective view showing a roof structure according to another embodiment of the present invention. [Figure 23] FIG. 11 is a perspective view showing a roof structure according to another embodiment of the present invention. [Figure 24] FIG. 11 is a perspective view showing a roof structure according to another embodiment of the present invention. [Diagram 25] FIG. 11 is a perspective view showing a roof structure according to another embodiment of the present invention. [Figure 26] FIG. 11 is a perspective view showing a roof structure according to another embodiment of the present invention. [Figure 27] FIG. 1 is a perspective view showing an example of a roof structure. [Figure 28] FIG. 4 is a cross-sectional view showing a roof structure according to another embodiment of the present invention. [Figure 29] FIG. 4 is a cross-sectional view showing a roof structure according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] FIG. 1 is a longitudinal cross-sectional view showing a roof structure 10 for the first embodiment of the present invention, FIG. 2 is an oblique view showing a main portion of roof structure 10, FIG. 3 is a cross-sectional view of a portion of roof structure 10, FIG. 4 is a longitudinal cross-sectional view showing roof structure 10, FIG. 5 is an oblique view showing a main portion of roof structure 10, and FIGS. 6 and 7 are oblique views showing the assembly process of roof structure 10.

[0013] As shown in Fig. 1, the main part of the roof structure 10 is formed by a fascia board 11 erected vertically and rafters 12 supported by girders (not shown). A decorative fascia board 13 is arranged on the outside of the fascia board 11, and a sheathing board 14 that forms a slope from the ridge side to the eaves side is arranged on the rafters 12. Note that Fig. 4 and Fig. 5 show different positions of the waterproof sheet 16 described later.

[0014] As shown in FIG. 6, vertical beams 15 are arranged at predetermined intervals on the sheathing board 14 from the ridge side toward the eaves side, and a waterproof sheet 16 is provided on the sheathing board 14. Between the vertical bars 15, roofing materials 20 made of sheet metal are provided. In addition, a water drainage member 30 for the eaves is arranged on the eaves side of the sheathing board 14, and is arranged on the underside of the roofing material 20. The water drainage member 30 is integrally formed by bending a metal plate.

[0015] The roofing material 20 comprises a flat portion 21 laminated on the sheathing board 14 and the water drainage member 30, a wall portion 22 erected along the vertical beams 15 from the side end of the flat portion 21, and a folded portion 23 provided on the eaves side of the flat portion 21.

[0016] The water drainage member 30 is formed integrally by bending a metal plate, with a main body 31 laminated on the sheathing board 14 and a guide piece (bent part) 32 bent downward from the eaves side of the main body 31. The above-mentioned folded part 23 is placed on the guide piece 32. The main body 31 includes a clamping part 31a clamped on the flat part 21 of the roof material 20 and the sheathing board 14, a protruding part 31b protruding toward the eaves side of the sheathing board 14, and a connecting part 31c connecting the clamping part 31a and the protruding part 31b. The plane of the clamping part 31a and the plane of the protruding part 31b are almost parallel, and the protruding part 31b side is formed slightly downward. The tip side of the protruding part 31b abuts against the folded part 23. A folded piece 33 is formed at the upper end of the clamping part 31a, and a folded piece 34 is formed at the lower end of the guide piece 32.

[0017] The main body 31 is formed in a flat plate shape and is placed on the sheathing board 14. The main body 31 has one or more beads 35b, 35c which are steps where a predetermined portion of the metal plate is displaced toward the front side from the surrounding area. For example, in the main body 31, in the flat clamping portion 31a, a plurality of main beads 35b and sub-beads 35c are formed as first beads, which extend in an inclined direction (first direction) that is a vertical direction from the ridge side toward the eaves side.

[0018] A plurality of main beads 35b are provided in the sandwiching portion 31a between the folded piece 33 and the connecting portion 31c. For example, the main beads 35b are arranged in a plurality of rows in the width direction. The main beads 35b have, for example, a rectangular region located higher than the surrounding areas and a top portion 35e displaced in a direction away from the sheathing board 14. For example, the main beads 35b are a step portion in which a part of the sandwiching portion 31a is displaced to protrude to the front side while maintaining its thickness, and a gap is formed between the back surface of the top portion 35e and the sheathing board 14. For example, the main beads 35b are arranged in two places in the water-repelling member 30. The width direction dimension of each main bead 35b is 20 to 30 mm. The protruding height of each main bead 35b is about several millimeters.

[0019] A fastening member 36 such as a screw is provided on the top 35e of the main bead 35b. That is, the flashing member 30 is fastened to the roofing board 14. For example, the flashing member 30 is fastened to the top 35e of the bead 35b or at least a part of the bead 35b at a position above, i.e., higher in the vertical direction.

[0020] As an example, in this embodiment, the flashing member 30 is fastened to the sheathing board 14 by the fastening member 36 provided on the top 35e of the main bead 35b. That is, in the clamping portion 31a, a fastening hole 31e through which the fastening member 36 passes is formed in the middle of the top 35e of the main bead 35b in the first and second directions, and the fastening member 36 is fastened. For example, the fastening member 36 is a screw integrally having a shaft portion 36a and a head portion 36b, and the shaft portion 36a penetrates the top portion 35e of the main bead 35b and is fastened to the sheathing board 14, and the head portion 36b is engaged on the top portion 35e of the main bead 35b. As an example, in this embodiment, the top portion 35e of the main bead 35b is formed in a rectangular shape.

[0021] The top 35e may be deformed by fastening a fastening member. For example, the central fastening portion of the top 35e may be deformed so as to be closer to the sheathing board 14 than the outer periphery of the top.

[0022] A plurality of sub-beads 35c are provided in the sandwiching portion 31a between the folded piece 33 and the connecting portion 31c. For example, the sub-beads 35c are arranged in a plurality of rows in the width direction of the water-repelling member 30. For example, the rectangular top portion 35f of the sub-bead 35c is displaced in a direction away from the sheathing board 14 more than the surrounding areas. That is, a gap is formed between the back surface of the top portion 35f of the sub-bead 35c and the sheathing board 14. The sub-bead 35c is narrower and more elongated than the main bead 35b. The sub-bead 35c has a top portion 35f extending in the vertical direction. The sub-bead 35c is provided at a required position according to various conditions such as the wind strength at the installation location and the fastening structure. For example, the width dimension of each sub-bead 35c is smaller than the width dimension of the main bead 35b. The protruding height of each sub-bead 35c is equal to the height of the main bead 35b, for example, about several millimeters.

[0023] In this embodiment, the main bead 35b and the sub-bead 35c, which are vertical beads, are formed by extending from the ridge side of the clamping portion 31a toward the eaves side along the inclined direction. The eaves side ends of the main bead 35b and the sub-bead 35c are located, for example, closer to the ridge side in the inclined direction than the connecting portion 31c. That is, each of the beads 35b and 35c is formed closer to the ridge side than the eaves side end of the clamping portion 31a.

[0024] For example, the drip-water board 30 is formed by pressing a flat steel plate or the like, so that the beads 35b and 35c, which are steps that are displaced so that the tops 35e and 35f protrude to the front side, are formed.

[0025] The connecting portion 31c extends downward from a position closer to the eaves than the end of the sheathing board 14. For example, the connecting portion 31c is a flat plate-like member in which the lower end of the clamping portion 31a is bent in a direction that is inclined downward from the extension direction of the clamping portion 31a, and serves as a step portion that connects the clamping portion 31a and the protruding portion 31b.

[0026] The protruding portion 31b is a plate-like portion that is integrally provided on the eaves-side end of the clamping portion 31a via a connecting portion 31c that is a downward step portion, and protrudes toward the eaves side.

[0027] The protruding folded-back portion 31d is a flat plate-like portion folded back from the end portion on the eaves side of the protruding portion 31b towards the roofing board side.

[0028] The guide piece (bent portion) 32 is a flat plate-shaped portion bent downward from the eaves side of the main body portion 31. For example, the guide piece (bent portion) 32 is bent downward from the end portion of the protruding folded-back portion 31d on the sheathing board 14 side. The guide piece 32 is bent downward from a position on the eaves side of the end portion of the sheathing board 14.

[0029] Next, the assembly process of such a roof structure 10 will be described. That is, as shown in Fig. 6, the flashing member 30 is placed on the eaves side of the sheathing board 14. Next, the roof material 20 is placed so that its lower end extends a few centimeters beyond the protruding portion 31b of the flashing member 30. Next, as shown in Fig. 7, the lower end side of the roof material 20 is bent downward and abutted against the lower end of the protruding portion 31b of the flashing member 30.

[0030] In the roof structure 10 configured in this manner, the beads 35b, 35c are formed on the water flashing 30, which improves the strength of the water flashing 30 and prevents deformation due to bending or twisting. This prevents the water flashing 30 from being deformed by external forces such as wind, causing problems such as floating off the sheathing board 14. On the other hand, by locating the fastening position at the top 35e of the bead 35b that is separated from the sheathing board 14 in the water flashing 30, water can be guided to areas other than the top of the bead 35b. In other words, it is possible to prevent water from entering the water flashing 30 through the fastening hole 31e through which the fastening member 36 such as a screw passes by running down the water flashing 30 due to capillary action. For example, when the main bead 35b is fastened, the portion where the head 36b of the fastening member is disposed is deformed so as to approach the sheathing board 14, but at least on the outer periphery of the fastening portion, the top 35e has a step away from the sheathing board 14, which prevents water from flowing to the fastening portion by capillary action. In addition, the roof structure 10 and the water drainage board 30 can suppress water from flowing by capillary action, which increases the freedom of the fastening position. Therefore, for example, the fastening position can be arranged closer to the center of the water drainage board 30, which can hold the water drainage board 30 more firmly, thereby improving the attachability of the roof structure 10.

[0031] Furthermore, rainwater that falls on the roofing material 20 during rainfall runs along the top surface of the flat portion 21 of the roofing material 20 and is guided to the eaves side. When the rainwater reaches the eaves side, almost all of it falls directly. Meanwhile, rainwater near the boundary between the flat portion 21 and the wall portion 22 is guided to the eaves side. Some of the guided rainwater flows into the gap between the wall portion 22 and the vertical beam 15. The guided rainwater is guided onto the protruding portion 31b of the drip edge member 30 by capillary action. Meanwhile, as shown in FIG. 1, the top surface of the protruding portion 31b and the flat portion 21 of the roofing material 20 are separated, so the rainwater is not guided to the clamping portion 31a side by capillary action.

[0032] FIG. 27 is a perspective view showing an example of a vertically roofed roof structure 100 as a comparative example. The roof structure 100 includes a sheathing board 101, vertical battens 102 arranged at a predetermined interval on the sheathing board 101 from the ridge side to the eaves side, and a waterproof sheet provided on the sheathing board 101. A metal roofing material 110 is provided between the vertical battens 102. A metal drainage member 120 is provided on the eaves side of the sheathing board 101 and is provided on the underside of the roofing material 110. In the roof structure 100, the roofing material 110 includes a flat portion 111 laminated on the sheathing board 101 and the drainage member 120, a wall portion 112 erected from the side end of the flat portion 111 along the vertical battens 102, and a folded portion 113 provided on the eaves side of the flat portion 111. According to this embodiment, compared to the roof structure 100 in the comparative example, rainwater does not reach the sheathing board 14 by flowing between the roof material 20, so damage to the sheathing board 14 can be prevented and the service life of the sheathing board can be extended.

[0033] In addition, in Figs. 4 and 5, the waterproof sheet 16 is placed on the clamping portion 31a of the drainage member 30, but the same effect can be obtained.

[0034] Fig. 8 is a perspective view showing a roof material 40 to be incorporated into a roof structure 10A according to a second embodiment of the present invention, Figs. 9 and 10 are perspective views showing the assembly process of the roof structure 10A using the roof material 40, and Fig. 8 is a perspective view showing the main parts of the roof structure 10A. In these figures, parts with the same functions as those in Figs. 1 to 5 are given the same reference numerals, and detailed explanations thereof will be omitted.

[0035] In the roof structure 10A, a roof material 40 is used instead of the roof material 20. Also, no vertical bars 15 are provided on the sheathing board 14. As shown in Fig. 8, the roof material 40 has a flat portion 41 that is laminated on the sheathing board 14 and the water-repelling member 30, an engaged protrusion 42 provided on the left end of the flat portion 41, an engaging protrusion 43 provided on the right end, and a folded portion 44 provided on the eaves side of the flat portion 41. The engaged protrusion 43 is placed over the engaged protrusion 42 to engage with it, forming a bar-shaped convex strip portion T from the ridge side to the eaves side.

[0036] Next, the assembly process of such a roof structure 10A will be described. That is, as shown in Fig. 9, the flashing member 30 is placed on the eaves side of the sheathing board 14. Next, in a state in which multiple roof materials 40 are engaged, they are placed so that their lower ends extend a few centimeters beyond the protruding portion 31b of the flashing member 30. Next, as shown in Fig. 10, the lower end side of the roof material 40 is bent downward and abutted against the lower end of the protruding portion 31b of the flashing member 30.

[0037] The roof structure 10A thus configured also has the same effect as the roof structure 10. That is, since the multiple beads 35b, 35c are formed on the water-repelling board 30, the strength of the water-repelling board 30 is improved, deformation due to bending or twisting can be prevented, and problems such as the water-repelling board 30 being deformed by external forces such as wind and floating off the sheathing board 14 can be prevented. In addition, by locating the fastening position on the top 35e of the bead 35b in the water-repelling board 30 that is separated from the sheathing board 14, water can be guided to areas other than the top of the bead 35b. That is, it is possible to prevent water from entering the water-repelling board 30 through the fastening hole 31e through which the fastening member 36 such as a screw passes by running down the water-repelling board 30 due to capillary action. For example, when the main bead 35b is fastened, the portion where the head 36b of the fastening member is disposed may be deformed so as to approach the sheathing board 14, but at least on the outer periphery of the fastening portion, the top 35e has a step away from the sheathing board 14, which prevents water from flowing to the fastening portion by capillary action. In addition, in the roof structure 10A and the water drainage board 30, the water drainage board 30 can be prevented from flowing by capillary action, which increases the freedom of the fastening position. Therefore, for example, the fastening position can be arranged near the center of the water drainage board 30, which can hold the water drainage board 30 more firmly, improving the attachability of the roof structure 10A.

[0038] In addition, rainwater that falls on the roofing material 40 during rainfall runs along the upper surface of the flat portion 41 of the roofing material 40 and is guided to the eaves side. When the rainwater reaches the eaves side, almost all of it falls directly. Meanwhile, rainwater near the boundary between the flat portion 41 and the engaged protrusion 42 or the flat portion 41 and the engaging protrusion 43 is guided to the eaves side. Some of the guided rainwater flows into the gap between the flat portion 41 and the convex strip portion T (double-dotted chain line Q in FIG. 11). The guided rainwater is guided onto the protrusion 31b of the water-skirting member 30 by capillary action. Meanwhile, as with the roof structure 10 described above, the upper surface of the protrusion 31b and the flat portion 41 of the roofing material 40 are separated, so water is not guided to the clamping portion 31a by capillary action.

[0039] Therefore, rainwater does not reach the top of the sheathing board 14 by flowing between the water drainage member 30 and the roof material 40, so that the sheathing board 14 can be prevented from being damaged and its lifespan can be extended.

[0040] Fig. 12 is a perspective view showing a roof material 50 to be incorporated into a roof structure 10B according to a third embodiment of the present invention, Figs. 13 to 15 are perspective views showing the assembly process of the roof structure 10B using the roof material 50, and Fig. 13 is a perspective view showing the main parts of the roof structure 10B. In these figures, parts with the same functions as those in Figs. 1 to 11 are given the same reference numerals, and detailed explanations thereof will be omitted.

[0041] In the roof structure 10B, a roof material 50 is used instead of the roof material 20. Also, no vertical bars 15 are provided on the sheathing board 14. As shown in Fig. 12, the roof material 50 has a flat portion 51 that is laminated on the sheathing board 14 and the water-repelling member 30, an engaged flange portion 52 provided on the left end of the flat portion 51, an engaging flange portion 53 provided on the right end, and a folded portion 54 provided on the eaves side of the flat portion 51. The engaging flange portion 53 engages with the engaged flange portion 52 by folding it over, and a plate-shaped convex portion U is formed from the ridge side to the eaves side.

[0042] Next, the assembly process of such a roof structure 10B will be described. That is, the flashing member 30 is placed on the eaves side of the sheathing board 14 as shown in Fig. 13. Next, in a state in which multiple roofing materials 50 are engaged, they are placed so that their lower ends extend several centimeters beyond the protruding portion 31b of the flashing member 30. In addition, the engaging flange portion 53 and the engaged flange portion 52 are overlapped together and folded twice to form a convex strip portion U. Next, a notch V is made on the lower end side of the roofing material 50 as shown in Fig. 14, and it is folded downward as shown in Fig. 15, and abutted against the lower end of the protruding portion 31b of the flashing member 30.

[0043] The roof structure 10B configured in this manner has the following effects. That is, rainwater that falls on the roof material 50 during rainfall flows along the upper surface of the flat portion 51 of the roof material 50 and is guided to the eaves side. When the rainwater reaches the eaves side, almost all of it falls as it is. Meanwhile, rainwater near the boundary between the flat portion 51 and the engaged flange portion 52 or the flat portion 51 and the engaging flange portion 53 is guided to the eaves side. Some of the guided rainwater flows into the gap between the flat portion 51 and the convex portion U (double-dotted chain line R in FIG. 16). The flowing rainwater is guided onto the protruding portion 31b of the water-skirting member 30 by capillary action. Meanwhile, as with the roof structure 10A described above, the upper surface of the protruding portion 31b and the flat portion 51 of the roof material 50 are separated from each other, so that the water is not guided to the sandwiching portion 31a by capillary action.

[0044] Therefore, rainwater does not reach the top of the sheathing board 14 by flowing between the water dripping member 30 and the roof material 50, so that the sheathing board 14 can be prevented from being damaged and its lifespan can be extended.

[0045] Fig. 17 is a perspective view showing a roof material 60 incorporated into a roof structure 10C according to a fourth embodiment of the present invention, and Fig. 18 is a perspective view showing a main part of the roof structure 10C using the roof material 60. In these figures, the same reference numerals are used for parts having the same functions as those in Figs. 1 to 16, and detailed explanations thereof will be omitted.

[0046] In roof structure 10C, roof material 60 is used instead of roof material 20. Furthermore, vertical bars 15 are not provided on sheathing board 14. As shown in Fig. 17, roof material 60 has a flat portion 61 that is laminated on sheathing board 14 and water drainage member 30, an engaged folded-back piece 62 provided at the lower end of this flat portion 61, and an engaging folded-back piece 63 provided at the upper end.

[0047] Next, the assembly process of such a roof structure 10C will be described. That is, as shown in Fig. 18, the flashing member 30 is placed on the eaves side of the sheathing board 14. Next, in a state in which multiple roofing materials 60 are engaged, they are placed so that their lower ends extend a few centimeters beyond the protruding portion 31b of the flashing member 30. Next, the engaged folded-back piece 62 of the roofing material 60 is abutted against the lower end of the protruding portion 31b of the flashing member 30. Next, the engaged folded-back piece 62 of another roofing material 60 is engaged with the engaging folded-back piece 63 of the roofing material 60 and placed.

[0048] In the roof structure 10C configured in this manner, rainwater that falls on the roof material 60 during rainfall flows along the upper surface of the flat portion 61 of the roof material 60 and is guided to the eaves side. When the rainwater reaches the eaves side, almost all of it falls directly. If the rainwater is guided onto the protruding portion 31b of the drip-water member 30 for some reason, as in the roof structure 10 described above, the upper surface of the protruding portion 31b and the flat portion 61 of the roof material 60 are separated from each other, so the water will not be guided to the clamping portion 31a side by capillary action.

[0049] Therefore, rainwater does not reach the top of the sheathing board 14 by flowing between the water drainage member 30 and the roof material 60, so that the sheathing board 14 can be prevented from being damaged and its lifespan can be extended.

[0050] Figure 19 is a perspective view showing roof structure 10D. In this figure, the same functional parts as in Figures 1 to 18 are given the same reference numerals. In roof structure 10D, a water drainage member 30A is used instead of water drainage member 30. Water drainage member 30A is provided with a bent guide piece 32a in which the tip side of guide piece 32 is bent outward. The angle of bent guide piece 32a is appropriately adjusted so that it can be smoothly guided to a rain gutter or the like. Even when water drainage member 30A is used, it is possible to prevent rainwater from entering the roofing board 14 in a similar manner.

[0051] FIG. 20 is a cross-sectional view showing the state of a roof structure (1 inch slope) 70 according to a fifth embodiment of the present invention during rainfall. Note that in these figures, the same reference numerals are used for parts with the same functions as those in FIGS. 1 to 5, and detailed explanations thereof will be omitted.

[0052] As shown in Figure 20, the main part of roof structure 70 is formed by fascia board 11 erected vertically and rafters 12 supported by girders (not shown). On the outside of fascia board 11, decorative fascia board 13 is arranged, and on top of rafters 12, sheathing board 14 is arranged, forming a slope with a 1-inch gradient from the ridge side to the eaves side. The 1-inch gradient is an inclination of sheathing board 14 of 5 to 6 degrees.

[0053] On the sheathing board 14, vertical bars 15 are arranged at regular intervals from the ridge side to the eaves side, and a waterproof sheet 16 is provided on the sheathing board 14. A metal roofing material 20 is provided between the vertical bars 15. In addition, a water drainage member 80 for the eaves side is arranged on the underside of the roofing material 20. The water drainage member 80 is integrally formed by bending a metal plate.

[0054] The roofing material 20 includes a flat portion 21 laminated on the sheathing board 14 and the flashing member 30, a wall portion 22 erected along the vertical beam 15 from the side end of the flat portion 21, and a folded portion 23 provided on the eaves side of the flat portion 21 and folded toward a protruding folded portion 31d of the flashing member 80 (described later). The roofing material 20 has a folded portion 23 in which the eaves side portion of the flat portion 21 protrudes toward the eaves side further than the sheathing board 14 and the flashing member 80, passes through the eaves side of the flashing member 80, and is folded downward and folded back to the back side of the protruding folded portion 31d. In other words, the folded portion 23 covers the eaves side of the protruding folded portion 31d of the flashing member 30.

[0055] The water drainage member 80 is formed integrally by bending a metal plate, with a main body 31 laminated on the sheathing board 14 and a guide piece 32 bent downward from the eaves side of the main body 31. The above-mentioned folded portion 23 is placed on the guide piece 32. The main body 31 includes a clamping portion 31a clamped on the flat portion 21 of the roof material 20 and the sheathing board 14, a protruding portion 31b protruding toward the eaves side of the sheathing board 14, and a connecting portion 31c connecting the clamping portion 31a and the protruding portion 31b. The clamping portion 31a has a plurality of beads 35b, 35c extending vertically. The plane of the clamping portion 31a and the plane of the protruding portion 31b are almost parallel, and the protruding portion 31b side is formed slightly downward. The tip side of the protruding portion 31b is close to the folded portion 23, but does not abut against it. A protruding folded-back portion 31d is formed by folding back a tip P of the protruding portion 31b toward the roofing board 14. A folded-back piece 33 (see FIG. 1) is formed at the upper end of the clamping portion 31a, and a folded-back piece 34 is formed at the lower end of the guide piece 32.

[0056] As shown in FIG. 20, the lower end position S of the clamping portion 31a is disposed so as to be higher than the boundary position K between the protruding folded-back portion 31d and the guide piece 32 in the vertical direction.

[0057] Next, the assembly process for such a roof structure 70 will be described. That is, the flashing member 80 is placed on the eaves side of the sheathing board 14. Next, the roof material 20 is placed so that its lower end extends a few centimeters beyond the protruding portion 31b of the flashing member 80. Next, the lower end side of the roof material 20 is bent downward to approach the lower end of the protruding portion 31b of the flashing member 80.

[0058] The roof structure 70 configured in this manner has the following effects. That is, rainwater that falls on the roof material 20 during rainfall flows along the upper surface of the flat portion 21 of the roof material 20 and is guided to the eaves side. When the rainwater reaches the eaves side, it temporarily accumulates at the eaves due to surface tension, and some of it falls from the eaves due to gravity. Meanwhile, rainwater near the boundary between the flat portion 21 and the wall portion 22 is guided to the eaves side. Some of the guided rainwater flows into the gap between the wall portion 22 and the vertical beam 15. The flowing rainwater is guided onto the protruding portion 31b of the water-skirting member 80 by capillary action. Meanwhile, since the upper surface of the protruding portion 31b and the flat portion 21 of the roof material 20 are separated, the rainwater is not guided to the clamping portion 31a side by capillary action.

[0059] Also, some of the rainwater that runs down the upper surface of the flat portion 21 of the roofing material 20 toward the eaves side stays on the tip side of the flat portion 21 due to surface tension as described above, as shown in Figure 20, and forms water droplets W. These water droplets W gradually grow larger, wet and spread to the tip of the folded portion 23 of the roofing material 20, and accumulate between the folded portion 23 and the protruding folded portion 31d of the water dripping member 80.

[0060] The water droplets W get between the underside of the protruding portion 31b of the drainage member 80 and the folded-back portion 23 of the roof material 20, and rise to the height of the boundary position K between the protruding folded-back portion 31d and the guide piece 32. Here, since the lower end position S of the clamping portion 31a is arranged to be higher in the vertical direction than the boundary position K between the protruding folded-back portion 31d and the guide piece 32, the rise of the water droplets W stops at the position of the two-dot chain line H, and the water droplets W do not rise to the lower end position S and do not reach between the clamping portion 31a of the drainage member 80 and the flat portion 21 of the roof material 20. Therefore, rainwater is not guided to the clamping portion 31a side by atmospheric pressure.

[0061] On the other hand, after rainfall, the water droplets W disappear, and a small amount of water Q accumulates on the upper surface of the folded-back portion 23 of the roof material 20. Since the water Q is exposed to the outside air, it will eventually evaporate.

[0062] In this way, with roof structure 70, rainwater does not reach the top of the sheathing boards 14 by flowing between the water drainage member 80 and roof material 20, preventing damage to the sheathing boards 14 and extending their lifespan. Although a one-inch gradient was exemplified in the above embodiment, rainwater can be prevented from flowing due to capillary action even if the gradient is changed, for example to a 3.5-inch gradient or a 6-inch gradient, and the same effect as in the above embodiment can be obtained.

[0063] Fig. 21 is a cross-sectional view showing the state of a roof structure (1 inch slope) 70A according to the sixth embodiment of the present invention during rainfall. In these figures, the same reference numerals are given to the same functional parts as those in Fig. 20, and detailed explanations thereof will be omitted.

[0064] In the roof structure 70A, the folded portion 23 of the roof material 20 is disposed almost horizontally, and its tip is slightly inclined downward. In this case, as shown in FIG. 21, during rainfall, the upper surface of the protruding portion 31b and the flat portion 21 of the roof material 20 are separated, so that rainwater is not led to the clamping portion 31a side by capillary action. In addition, since the lower end position S of the clamping portion 31a is disposed to be higher in the vertical direction than the boundary position K between the protruding folded portion 31d and the guide piece 32, even if the water droplet W enters between the lower surface of the protruding portion 31b of the water dripping member 80 and the folded portion 23 of the roof material 20 and rises to the height of the boundary position K, the water droplet W stops rising at the position of the two-dot chain line H. Therefore, the water droplet W does not rise to the lower end position S, and does not reach between the clamping portion 31a of the water dripping member 80 and the flat portion 21 of the roof material 20. Therefore, the rainwater is not led to the clamping portion 31a side by atmospheric pressure.

[0065] On the other hand, after rainfall, the water droplets W run down along the slight incline of the folded-back portion 23, and water does not accumulate. At this time, since the folded-back portion 23 is almost horizontal, the influence of the wind blowing up from below can be minimized, and the water droplets W do not get in above the protruding portion 31b.

[0066] Thus, with roof structure 70A, rainwater does not reach the top of the sheathing boards 14 by flowing between the drainage member 80 and the roof material 20, preventing damage to the sheathing boards 14 and extending their lifespan. Although a one-inch gradient was exemplified in the above embodiment, rainwater can be prevented from flowing due to capillary action even if the gradient is changed, for example to a 3.5-inch gradient or a 6-inch gradient, and the same effect as in the above embodiment can be obtained.

[0067] In the above embodiment, the drainage member 30 has the connection portion 31c that forms a step between the protruding portion 31b and the clamping portion 31a, but the present invention is not limited to this. For example, as another embodiment, as shown in FIG. 22, the drainage board may have a configuration in which the protruding portion 31b is formed continuously from the flat clamping portion 31a without the connection portion 31c, as in the roof structure 10E. Even in this case, the strength of the drainage member 30 can be improved by forming the beads 35b and 35c. In addition, by configuring the fastening member to be disposed at the top 35e of the bead 35b, water can be guided so as not to reach the fastening member, and water can be prevented from entering through the fastening hole 31e through which the fastening member passes, and the same effect as the above embodiment can be obtained.

[0068] In the above embodiment, the main bead 35b of the water drainage member 30 has a rectangular apex 35e, and the fastening portion is provided within the apex 35e, but the present invention is not limited to this. For example, a bead protruding to the front side may be formed at a position vertically lower than the fastening hole 31e, which is the fastening portion, or at a position on the eaves side. For example, in the roof structure 10F shown in FIG. 23 as another embodiment, a frame-shaped bead 35h is formed around the fastening portion where the fastening member 36 is arranged, and an area A including the fastening portion inside the bead 35h is arranged closer to the sheathing board 14 on the back side than the apex 35i of the bead 35h. In this embodiment, the bead 35h guides water so that it does not reach the fastening portion, so that the same effect as the above embodiment can be obtained. In addition, a bead protruding to the front side may be formed only on the eaves side from the fastening member 36.

[0069] In the above embodiment, the first vertical beads are each provided with two main beads 35b and two sub-beads 35c, but the present invention is not limited to this, and the positions and numbers of the beads 35b and 35c can be changed as appropriate. For example, the positions and numbers can be set as appropriate depending on various conditions, such as whether the area is windy or not. For example, the main beads 35b may be formed at the fastening portion, and the sub-beads 35c may not be formed.

[0070] For example, as another embodiment, as shown in Figs. 24 and 25, a horizontal bead 35a may be further provided as a second bead extending in a width direction (second direction) perpendicular to or intersecting with the first direction. For example, in the example shown in Figs. 24 and 25, the horizontal bead 35a is provided at the upper end of the clamping portion 31a and in the vicinity of the folded piece 33. The horizontal bead 35a has an elongated shape extending along the width direction of the roofing material, and is formed over the entire width direction of the water flashing member 30. The horizontal bead 35a has a top 35d that protrudes to the front side more than the surrounding parts. For example, the horizontal bead 35a is a step portion that is displaced to protrude to the front side while maintaining its thickness at the edge portion on one end side of the clamping portion 31a in the inclination direction, and a gap is formed between the back surface of the top 35d and the sheathing board 14. This embodiment also has the same effects as the above embodiment. Furthermore, according to this embodiment, the configuration having the beads 35a, 35b, 35c extending in both the vertical and horizontal directions, respectively, makes it possible to effectively prevent the water draining member 30 from twisting.

[0071] In the above embodiment, an example is shown in which the fastening member 36 deforms the central portion of the top 35e of the bead 35b so that it is closer to the subfloor 14 side. However, this is not limited to this, and for example, as shown in FIG. 26, the central portion, which is the part fastened by the fastening member 36, may be positioned at the same height as the outer periphery of the top 35e of the bead 35b.

[0072] Also, for example, in another embodiment, a waterproof member may be provided on the back side of the bead 35a. For example, in the roof structure according to another embodiment shown in Fig. 28 and Fig. 29, a waterproof tape 39 is attached to the gap formed between the back side of the bead 35b and the sheathing board 14 as a waterproof member having water-stopping properties. The waterproof tape 39 is made of, for example, a flexible material. The waterproof tape 39 may be configured to be elastically deformable, or may be foamable and compressible. As an example, the waterproof tape 39 includes a foam layer containing synthetic rubber or EPDM, a base material made of cotton cloth or the like, and an adhesive layer having a butyl rubber-based adhesive. For example, a release liner may be attached to the adhesive layer of the waterproof tape 39 before installation. The waterproof tape 39 is configured to have a shape that fits the space formed between the bead 35a and the sheathing board 14 on the back side of the bead 35a. In this embodiment, the waterproof tape 39 is configured to have a rectangular shape equivalent to the bead 35a in a plan view and has a predetermined thickness. The waterproof tape 39 may be configured to have a thickness equivalent to the height dimension of the bead 35a, or if the waterproof tape 39 is made of a compressible material, may be configured to have a thickness larger than the height of the bead 35a as appropriate, and may be configured to be compressed in the assembled state to have a height equivalent to that of the bead 35a. For example, the waterproof tape 39 is provided in an area including the periphery of the fastening member 36. For example, with the waterproof tape 39 affixed to an area including the fastening hole 31e on the rear surface of the bead 35a, the flashing member 30 is installed on the sheathing board 14, and when fastening members 36 such as screws are fastened to the fastening holes 31e, the fastening members 36 penetrate the waterproof tape 39 and are fastened, whereby the flashing member 30 is fastened to the sheathing board 14 via the waterproof tape 39. According to this embodiment, the space between the sheathing board 14 and the bead 35a is not crushed, and deformation of the bead 35a can be prevented. Also, infiltration of water through the fastening hole 31e can be prevented. This embodiment also has the same effects as the above embodiment. Furthermore, according to this embodiment, when the screw is installed, the bead 35b is not crushed and maintains its original shape, so water is less likely to accumulate. The waterproof member is not limited to the tape, and may be composed of a filler filled with a resin material or the like instead of the tape.

[0073] The present invention is not limited to the above-mentioned embodiment, and can be modified in various ways without departing from the gist of the present invention. The embodiments may be combined as appropriate, and in that case, the combined effect can be obtained. Furthermore, the above-mentioned embodiment includes various inventions, and various inventions can be extracted by combinations selected from the multiple components disclosed. For example, if the problem can be solved and the effect can be obtained even if some components are deleted from all the components shown in the embodiment, the configuration from which the components are deleted can be extracted as an invention. [Explanation of symbols]

[0074] 10, 10A, 10B, 10C, 10D, 10E, 10F...Roof structure, 12...Rafters, 13...Gable boards, 14...Shelling boards, 15...Vertical beams, 16...Waterproof sheets, 20...Roofing materials, 21 ...Plane part, 22...Wall part, 23...Folded part, 30...Member, 30A...Member, 31...Main body part, 31a...Clip part, 31b...Protrusion part, 31c...Connection part, 31d...Protrusion folded part, 32...Plan Inner piece (bending part), 32a...Bending guide piece, 40...Roofing material, 41...Flat part, 42...Engaged convex part, 43...Engaging convex part, 44...Folding part, 50...Roofing material, 51...Flat part, 52...Engaged Flange part, 53...Engaging flange part, 54...Folding part, 60...Roofing material, 61...Plane part, 62...Engaged folding piece, 63...Engaging folding piece, 70...Roof structure, 70A...Roof structure, 80...Draining member.

Claims

1. It is installed on the eaves of the roofing board, A plate-shaped clamping portion having a bead protruding from the front side; A flat bent portion bent downward at the eaves side of the clamping portion, A drainage component that is fastened to the subfloor.

2. The clamping portion is formed with a fastening hole through which a fastening member to be fastened to the roofing board passes, The water drainage member according to claim 1 , wherein the fastening hole is positioned at a top of the bead or at a position above at least a portion of the bead.

3. The drainage member according to claim 2 , further comprising a protrusion that is integrally formed with the eaves side end of the clamping portion via a downward step and that protrudes toward the eaves side.

4. A protruding folded-back portion is provided that is folded back from the protruding portion toward the roofing board side, The draining member according to claim 3 , wherein the bent portion is bent downward from the protruding folded portion.

5. The guttering member according to claim 4, wherein the bead has a main bead and a sub-bead whose dimension in a width direction perpendicular to the extension direction is smaller than that of the main bead, and the top of the main bead is fastened to the subfloor board.

6. The bead includes a plurality of first beads extending in a longitudinal direction; a second bead extending in a transverse direction intersecting or perpendicular to the longitudinal direction; The drainage member according to claim 2 , which is fastened to the subfloor at the first bead.

7. The drainage member according to claim 2 , wherein a waterproof member is provided in an area including around the fastening hole between the back side of the bead and the subfloor.

8. A draining member according to any one of claims 1 to 7, Subfloor boards and A plurality of roof materials provided on the sheathing board; A roof structure comprising:

9. The roof material includes a folded portion that protrudes toward the eaves end and is folded downwardly to the protruding folded portion of the water drainage member, 9. The roof structure according to claim 8, wherein a lower end position of the clamping portion is higher in the vertical direction than a boundary position between the protruding folded-back portion and the folded portion.

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