Flashing ventilation material and attic space ventilation structure

Abstract

To facilitate handling and improve workability by combining a body part made of a synthetic resin and a cover plate part made of a metal plate.SOLUTION: The flashing ventilating material 3 is arranged between the flashing material covering the joint part of the external wall and the lean-to roof and the lean-to roof. The flashing ventilating material 3 has a main body part 30 made of a synthetic resin long in the lateral direction A, and a first cover plate part 51 made of a metal plate long in the lateral direction A combined with the main body part 30 from above. The main body 30 includes a bottom wall 35 and first to fourth lateral walls 41 to 44 extending upward from the bottom wall 35 in the left-right direction A. The first cover plate portion 51 includes a top plate 51a and a rear hanging plate 51c that hangs down from the top plate 51a and extends in the left-right direction. The first lateral wall 41 and the rear hanging plate 51c are disposed to be spaced apart from each other in the front-rear direction B, and a meandering ventilation path 120 is formed therein.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a ventilation system for attics, which is installed at the ridge or at the joint between the eaves and the exterior wall of a building to ventilate the eaves or attic space of the building. The present invention also relates to a ventilation structure for attics using the ventilation system for attics. [Background technology]

[0002] Conventionally, a ventilation element for ventilating the attic space under a roof shed has been installed at the top of the roof shed under a flashing (water-repelling material) made of sheet metal that covers the joint between the exterior wall and the roof shed to prevent rainwater from entering. Patent Document 1 describes a ventilation element composed of a long, horizontally elongated member and an intermediate member that is placed over the long member and is positioned between the long member and the flashing. A circuitous ventilation passage is formed inside the ventilation element from front to rear, allowing ventilation of the attic space while preventing rainwater from entering the attic space through the ventilation passage. It has also been proposed to place a ventilation element under a ridge cover (flashing material) to ventilate the attic (soffit). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 3935169 Summary of the Invention [Problem to be solved by the invention]

[0004] The long and intermediate members that make up the ventilation material described in Patent Document 1 are made by processing hot-dip 55% aluminum-zinc alloy-plated steel sheets. Therefore, the ventilation material is prone to bending and deformation when transported, making it difficult to handle. Furthermore, the ventilation material is first assembled and installed by placing the intermediate member on the long and intermediate members via a cylindrical packing, and then covering these with the long and intermediate members that serve as flashing and fastening them with nails. This presents a problem of reduced workability.

[0005] Therefore, an object of the present invention is to provide a rain flashing ventilation material that is easy to handle and improves installation by combining a synthetic resin main body with a metal cover plate. Another object of the present invention is to provide an attic ventilation structure in which the rain flashing material is less likely to be blown up or damaged by wind. [Means for solving the problem]

[0006] In a first aspect, the rain guttering ventilation material of the present invention is a rain guttering ventilation material that has a lateral wall that rises upward from a bottom wall and extends in the left-right direction, and is equipped with a main body that is long in the left-right direction, and a hanging plate that hangs down from a top plate and extends in the left-right direction, and a cover plate that is long in the left-right direction, and the cover plate is combined from above the main body to form a ventilation passage that curves inside, and is characterized in that the main body is made of synthetic resin and the cover plate is made of metal plate.

[0007] In addition, from a second perspective, the rain gutter ventilation material of the present invention comprises a main body portion made of synthetic resin that is long in the left-right direction, and a cover plate portion made of a metal plate that is long in the left-right direction and is combined with the main body portion from above, the main body portion having a bottom wall and side walls that rise upward from the bottom wall and extend in the left-right direction, the cover plate portion having a top plate and a hanging plate that hangs down from the top plate and extends in the left-right direction, the side walls and the hanging plate being arranged at a distance from each other in the front-to-back direction, and a curved ventilation passage is formed inside.

[0008] According to these, the main body is made of synthetic resin, which improves the ease of handling of the main body and allows for improved installation of the rain flashing ventilation material. Furthermore, since the main body is made of synthetic resin, it is possible to increase the design freedom to make it more difficult for rainwater to enter, such as by diversifying and complicating the number, width, length, arrangement, and shape of the side walls (obstruction walls), compared to steel plate versions. Furthermore, since it has a curved ventilation passage inside, it is possible to prevent rainwater from entering the attic space through the ventilation passage.

[0009] In the present invention, it is preferable that a ventilation opening communicating with the ventilation passage is formed at the front end of the lower surface (bottom wall) of the main body, whereby the ventilation opening is formed facing downward, thereby effectively preventing rainwater from entering the ventilation passage.

[0010] In addition, from a third aspect, the rain flashing ventilation material of the present invention comprises a main body portion made of synthetic resin and long in the left-right direction, and a first cover plate portion made of a metal plate and long in the left-right direction, wherein the main body portion has a bottom wall, a front wall rising upward from the front end of the bottom wall and extending in the left-right direction, and a first lateral wall rising upward from the bottom wall rearward of the front wall in the front-to-back direction and extending in the left-to-right direction, and the first cover plate portion has a first top plate, a first front hanging plate hanging down from the front end of the first top plate and extending in the left-to-right direction, and a first rear hanging plate hanging down from the rear end of the first top plate and extending in the left-to-right direction, and is attached to the main body portion by covering the front wall and the first rear hanging plate being spaced apart from the first lateral wall and the bottom wall.

[0011] This allows the main body to be made of synthetic resin, improving its ease of handling and the ease of installation of the ventilation flashing material, and increasing the degree of design freedom in terms of the number, width, length, spacing, and shape of the side walls (obstruction walls). Furthermore, because the main body is made of synthetic resin, the lower end (front flap) of the flashing material, which is made of sheet metal, can be screwed to the front wall of the main body via the first front hanging plate of the first cover plate, preventing the flashing material from being rolled up or deformed by wind. Furthermore, a curved ventilation passage is formed between the main body and the first cover plate. This makes it possible to prevent rainwater from entering the attic space through the ventilation passage.

[0012] In the present invention, the air conditioning unit further includes a second cover plate made of a metal plate elongated in the left-right direction and positioned rearward of the first cover plate, wherein the main body further includes a second side wall rearward of the first side wall and the first rear hanging plate, rising upward from the bottom wall and extending in the left-right direction, and the second cover plate includes a second top plate, a second front hanging plate hanging down from the front end of the second top plate and extending in the left-right direction, and a second rear hanging plate hanging down from the rear end of the second top plate and extending in the left-right direction, wherein the second front hanging plate and the second rear hanging plate are spaced apart from the second side wall and the bottom wall and are combined with the main body by covering it from above. This forms a circuitous ventilation passage between the main body and the second cover plate, further preventing rainwater from entering the attic space through the ventilation passage. Furthermore, the first cover plate portion and the second cover plate portion can be made to be a common accessory, thereby preventing an increase in the number of different types of parts with different shapes.

[0013] Furthermore, the attic ventilation structure of the present invention is a ventilation structure for an attic that includes a rain flashing ventilation material having a ventilation passage and arranged so that the ventilation passage is connected to the attic space, and a rain flashing material arranged to cover the rain flashing ventilation material from above, characterized in that the rain flashing ventilation material has a front wall made of synthetic resin, and the rain flashing material is made of a metal plate and has an extension portion that covers the rain flashing ventilation material from above, and a front flap portion that is bent downward from the front end of the extension portion and covers the front wall of the rain flashing ventilation material, and the front flap portion of the rain flashing material is fixed to the front wall of the rain flashing ventilation material.

[0014] As a result, since the front wall of the flashing ventilation material is made of synthetic resin, the front flap portion of the flashing material, which is made of metal plate (sheet metal, steel plate), can be fixed to the front wall of the flashing ventilation material, preventing the flashing material from being rolled up or deformed by the wind. [Effects of the Invention]

[0015] According to the first and second aspects of the ventilation flashing of the present invention, the main body is made of synthetic resin, which improves the handleability of the main body and allows for improved installation of the ventilation flashing. Furthermore, since the main body has a curved ventilation passage inside, it is possible to prevent rainwater from entering the attic space through the ventilation passage. Furthermore, since the main body is made of synthetic resin, the design freedom of the side wall (obstruction wall) can be improved compared to a case made of steel plate. According to a third aspect of the ventilation flashing of the present invention, the main body is made of synthetic resin, which improves the ease of handling of the main body and the ease of installation of the ventilation flashing. Furthermore, because the main body is made of synthetic resin, the lower end (front flap) of the flashing, which is made of sheet metal, can be screwed to the front wall of the main body via the first front hanging plate of the first cover plate, preventing the flashing from being rolled up or deformed by wind. Furthermore, a circuitous ventilation passage is formed between the main body and the first cover plate. This makes it possible to prevent rainwater from entering the attic space through the ventilation passage. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a schematic cross-sectional view showing a state in which a rain gutter ventilation unit including a rain gutter ventilation material according to one embodiment of the present invention is attached to a joint between a eaves and an exterior wall, which are part of a building. [Figure 2] 2 is a perspective view of the ventilation flashing shown in FIG. 1 placed horizontally and viewed from diagonally above the front left. FIG. [Figure 3] 2 is a perspective view of the ventilation flashing shown in FIG. 1 placed horizontally, as viewed from diagonally above the rear left. FIG. [Figure 4] 2 is a perspective view of the ventilation flashing shown in FIG. 1 placed horizontally as viewed from the front left diagonally below. FIG. [Figure 5] FIG. 3 is a plan view of the ventilation flashing shown in FIG. 2. [Figure 6] FIG. 6 is a cross-sectional view of the ventilation flashing material taken along line VI-VI shown in FIG. 5. [Figure 7] FIG. 3 is an exploded perspective view of the ventilation flashing shown in FIG. 2. [Figure 8] FIG. 4 is a perspective view of the main body shown in FIG. 3. DETAILED DESCRIPTION OF THE INVENTION

[0017] A rain flashing ventilation material 3 according to one embodiment of the present invention will be described below with reference to Figures 1 to 8. Figure 1 shows a state in which a rain flashing ventilation unit including a rain flashing ventilation material according to one embodiment of the present invention is attached to a joint between a roof and an exterior wall, which are parts of a building. A building 100 in this embodiment has an exterior wall 101, a roof 102, a rain flashing ventilation unit 1, etc.

[0018] The exterior wall 101 includes a base material 105, vertical furring strips 108, and siding 109 that form the base of the exterior wall 101. A moisture-permeable waterproof sheet (not shown) is placed on the outdoor side of the base material 105. The vertical furring strips 108 are fixed to the base material 105 with nails or the like so that the moisture-permeable waterproof sheet is sandwiched between the base material 105 and the vertical furring strips 108. The siding 109 is also fixed to the base material 105 with nails or the like so that the vertical furring strips 108 are sandwiched between the base material 105 and the siding 109.

[0019] The shed 102 includes rafters 111, sheathing boards 112, roofing material 113, and wooden underlayment 114. The sheathing boards 112 are fixed onto the rafters 111, and the roofing material 113 is fixed onto the sheathing boards 112. At the joint 103 between the exterior wall 101 and the shed 102, a long hole 104 leading to an attic space 115 is formed in the left-right direction A between the sheathing boards 112 and the underlayment material 105. The wooden underlayment 114 is fixed to the end of the sheathing boards 112 on the underlayment material 105 side so as to support a rain flashing ventilation material 3 (described later) from below, and the roofing material 113 is butted to the side via a sliding door. In addition, a metal shielding plate 107 is attached to the sheathing boards 112 on the underlayment material 105 side of the wooden underlayment 114. A ceiling material (not shown) is arranged below the rafters 111, and an attic space 115 is defined between the ceiling material and the sheathing boards 112. Note that asphalt roofing (roof underlayment material) 116 is arranged between the sheathing boards 112 and the roof material 113, wooden underlayment 114, and shielding board 107. In addition, a shielding board 107 made of sheet metal or the like that blocks water from entering the attic is fixed to the sheathing boards 112 in the area surrounded by the upper surface of the end of the sheathing boards 112 facing the underlayment material 105 and the side surface of the wooden underlayment 114 facing the underlayment material 105, as needed. If the airtight material 55 of the rain flashing ventilation material 3, which will be described later, serves as a primary watertight seal, then the shielding board 107 can be said to serve as a secondary watertight seal.

[0020] The flashing ventilation unit 1 in this embodiment includes a flashing (rain flashing / draining) 2 and a flashing ventilation member 3. The flashing 2 is manufactured by sheet metal processing of a metal plate (e.g., hot-dip 55% aluminum-zinc alloy-plated steel sheet). The flashing 2 may be made of a material other than hot-dip 55% aluminum-zinc alloy-plated steel sheet. The flashing 2 is a drainage material that is elongated in the left-right direction A and has an attachment plate portion 2a, an upper extension portion 2b, a front drape portion 2c, and a lower extension portion 2d, and can be processed and procured on-site. The left-right direction A is a horizontal direction that is perpendicular to the front-rear direction B and is the direction when viewed from the front.

[0021] The mounting plate portion 2a is a plate-like portion formed in a vertical plane along the up-down direction C. The mounting plate portion 2a is attached to the base material 105 with nails or the like while being aligned along the side of the base material 105. The upper extension portion 2b is a plate-like portion extending from the lower portion of the mounting plate portion 2a at an angle downward toward the front. This allows rainwater that falls onto the upper extension portion 2b from the outdoor surface of the siding 109 to be guided toward the front flap portion 2c. The front flap portion 2c is a plate-like portion extending downward from the front end of the upper extension portion 2b. The front flap portion 2c is spaced apart from the upper surface of the roof material 113 and covers the front wall of the rain flashing ventilation material 3. The lower extension portion 2d is a plate-like portion extending from the lower end of the front flap portion 2c at an angle downward toward the front.

[0022] As shown in Figures 2 to 6, the ventilation flashing member 3 is formed long in the left-right direction A and includes a main body 30, two cover plate members 51 and 52, and an airtight member 55. As shown in Figures 7 and 8, the main body 30 has a generally box-like shape that opens upward, and includes a front wall 31, a right wall 32, a left wall 33, a rear wall 34, a bottom wall 35, a plurality of partition walls 36, a plurality of first horizontal walls 41, a plurality of second horizontal walls 42, a plurality of third horizontal walls 43, and a plurality of fourth horizontal walls 44. The main body 30 is made of synthetic resin.

[0023] The front wall 31 is a plate-shaped portion that stands upward from the front end of the bottom wall 35 and extends in the left-right direction A. The right wall 32 is a plate-shaped portion that stands upward from the right end of the bottom wall 35 and extends in the front-to-back direction B. The left wall 33 is a plate-shaped portion that stands upward from the left end of the bottom wall 35 and extends in the front-to-back direction B. The rear wall 34 is a plate-shaped portion that stands upward from the rear end of the bottom wall 35 and extends in the left-to-right direction A. The upper ends of the front wall 31, right wall 32, and left wall 33 are at the same height level in the up-down direction C. The upper end of the rear wall 34 is located lower than the upper ends of the front wall 31, right wall 32, and left wall 33.

[0024] As shown in Fig. 6, the bottom wall 35 has a first bottom plate portion 35a, a second bottom plate portion 35b, and a connecting portion 35c. The first bottom plate portion 35a constitutes the central portion and front portion of the bottom wall 35 in the front-rear direction B. The first bottom plate portion 35a is a plate-shaped portion extending in the left-right direction A and the front-rear direction B. As shown in Fig. 4, a plurality of openings 35d are formed in the front portion of the first bottom plate portion 35a as ventilation openings. The plurality of openings 35d are arranged side by side in the left-right direction A.

[0025] As shown in FIG. 6, the second bottom plate portion 35b constitutes the rear portion of the bottom wall 35 and is disposed lower than the first bottom plate portion 35a. The second bottom plate portion 35b is also a plate-shaped portion extending in the left-right direction A and the front-rear direction B. The connecting portion 35c extends downward from the rear end of the first bottom plate portion 35a so as to connect the rear end of the first bottom plate portion 35a with the front end of the second bottom plate portion 35b. The connecting portion 35c is also a plate-shaped portion extending in the left-right direction A. As shown in FIG. 7, the right wall 32 and the left wall 33 are erected upward from the first bottom plate portion 35a and the second bottom plate portion 35b, which is positioned one step lower than the first bottom plate portion 35a, and therefore both have a horizontal L-shape.

[0026] The partition walls 36 are disposed between the right wall 32 and the left wall 33, are erected upward from the bottom wall 35, and are plate-shaped portions extending in the front-rear direction B. The partition walls 36 are equally spaced apart along the left-right direction A. More specifically, the partition walls 36 are disposed between the openings 35d. That is, the separation distance between two adjacent partition walls 36 in the left-right direction A is approximately equal to the length of the openings 35d in the left-right direction A. The partition walls 36 are also erected upward from the first bottom plate portion 35a and the second bottom plate portion 35b, and thus, like the right wall 32 and the left wall 33, are formed in a horizontal L-shape. The upper ends of the partition walls 36 are at the same height level as the upper ends of the front wall 31, the right wall 32, and the left wall 33 in the up-down direction C.

[0027] Three slits 37-39 are formed in each of the right wall 32, the left wall 33, and each partition wall 36, and are spaced apart from one another in the front-to-rear direction B. Slit 37 is located toward the front of each of the walls 32, 33, and 36. Slit 39 is located toward the rear of each of the walls 32, 33, and 36. Slit 38 is located between two of the slits 37 and 39 in each of the walls 32, 33, and 36. The three slits 37-39 extend from the upper ends of the respective walls 32, 33, and 36 toward the bottom wall 35, and slit 39 is deeper than the two slits 37 and 38. The depth of slit 39 is slightly longer than the length of a front hanging plate 52b (described below) of cover plate 52 in the up-down direction C, and is long enough to fit into slit 39 when cover plate 52 is assembled to main body 30.

[0028] The slits 37 have two different depths. Slit 37a is shallower than slit 37b and is approximately the same depth as slit 38. The depths of slits 37a and 38 are slightly longer than the lengths in the up-down direction C of rear hanging plates 51c and 52c of cover plate 51 and cover plate 52 (both described below), and are of such lengths that the rear hanging plates 51c and 52c fit into slits 37a and 38 when cover plate 51 and cover plate 52 are assembled to main body 30. Slit 37a is formed in right wall 32, left wall 33, and some of the multiple partition walls 36. Slit 37b is formed in the remaining partition walls 36 that do not have slit 37a formed therein, and has a depth that reaches from the upper end to the lower end of each partition wall 36.

[0029] 7 and 8, the multiple first lateral walls 41 are arranged at the frontmost positions among the first to fourth lateral walls 41 to 44 and further forward than the slit 37, and are aligned in the left-right direction A. The multiple first lateral walls 41 are also arranged between the right wall 32 and the partition wall 36, between the multiple partition walls 36, and between the left wall 33 and the partition wall 36, connecting the left and right walls. The multiple first lateral walls 41 are plate-shaped portions that stand upward from ends that define the rear ends of the openings 35d of the bottom wall 35 and extend in the left-right direction A.

[0030] The multiple fourth horizontal walls 44 are arranged at the rearmost position among the first to fourth horizontal walls 41 to 44, between the two slits 38, 39 in the front-rear direction B, and are aligned in the left-right direction A. The multiple fourth horizontal walls 44 are also arranged between the right wall 32 and the partition wall 36, between the multiple partition walls 36, and between the left wall 33 and the partition wall 36, connecting the left and right walls. The multiple fourth horizontal walls 44 are plate-shaped portions that stand upward from the connecting portion 35c and extend in the left-right direction A.

[0031] The second lateral walls 42 and the third lateral walls 43 are arranged between the first lateral wall 41 and the fourth lateral wall 44 and between the two slits 37, 38 in the front-rear direction B, and are aligned in the left-right direction A. The second lateral walls 42 are arranged forward of the third lateral walls 43. As shown in FIG. 5 , the third lateral walls 43 are arranged in the center of the main body 30 in the front-rear direction B. In other words, the third lateral walls 43 are arranged along a center line G that passes through the center of the main body 30 in the front-rear direction B and extends in the left-right direction A.

[0032] 7 and 8, the plurality of second lateral walls 42 are also arranged between the right wall 32 and the partition wall 36, between the plurality of partition walls 36, and between the left wall 33 and the partition wall 36, connecting the left and right walls. The plurality of third lateral walls 43 are also arranged between the right wall 32 and the partition wall 36, between the plurality of partition walls 36, and between the left wall 33 and the partition wall 36, connecting the left and right walls. The plurality of second lateral walls 42 and the plurality of third lateral walls 43 are plate-shaped portions that stand upward from the first bottom plate portion 35a and extend in the left-right direction A.

[0033] 6, the upper ends of the first to fourth horizontal walls 41 to 44 are arranged at approximately the same height level in the vertical direction C, and all are located below the upper end of the partition wall 36. More specifically, the upper ends of the first to fourth horizontal walls 41 to 44 are arranged at the same height level in the vertical direction C as the upper end of the rear wall 34. Furthermore, the upper ends of the first to fourth horizontal walls 41 to 44 are arranged slightly above the bottoms of the slits 37a and 38 in the vertical direction C.

[0034] 5 to 8, the main body 30 has a plurality of cylindrical portions 45. Each cylindrical portion 45 has a through-hole 45a penetrating in the up-down direction C, and its center is disposed on the center line G. The plurality of cylindrical portions 45 are also disposed spaced apart from one another in the left-right direction A.

[0035] The two cover plates 51 and 52 are both manufactured by processing a metal plate (for example, a hot-dip 55% aluminum-zinc alloy plated steel plate). Note that the cover plates 51 and 52 may be made of a metal plate other than a hot-dip 55% aluminum-zinc alloy plated steel plate.

[0036] 7, of the two cover plates 51, 52, one cover plate (first cover plate) 51 is disposed forward of the other cover plate (second cover plate) 52. Cover plate 51 has a top plate (first top plate) 51a, a front hanging plate (first front hanging plate) 51b, and a rear hanging plate (first rear hanging plate) 51c, and is formed in an inverted U shape that opens downward. Top plate 51a, front hanging plate 51b, and rear hanging plate 51c extend in the left-right direction A.

[0037] 6, top plate 51a is a plate-like portion that is disposed parallel to bottom wall 35 when cover plate portion 51 is combined with main body portion 30. Front hanging plate 51b and rear hanging plate 51c extend perpendicular to top plate 51a. Front hanging plate 51b is a plate-like portion that stands upright from the front end of top plate 51a, and rear hanging plate 51c is a plate-like portion that stands upright from the rear end of top plate 51a.

[0038] The length of front hanging plate 51b from top plate 51a in the up-down direction C is longer than the length of rear hanging plate 51c from top plate 51a in the up-down direction C. Furthermore, front hanging plate 51b covers the entire front surface of front wall 31 when cover plate 51 is combined with main body 30. When cover plate 51 is attached to main body 30, rear hanging plate 51c fits into slit 37, is spaced apart from first lateral wall 41 and second lateral wall 42 in the front-to-back direction B, and has its lower end located near the bottom of slit 37a. In other words, when cover plate 51 is combined with main body 30, the lower end of rear hanging plate 51c is located at the same height level in the up-to-down direction C as the upper ends of the plurality of first to fourth lateral walls 41 to 44. In addition, when the cover plate portion 51 is combined with the main body portion 30, the rear hanging plate 51c and the multiple first to fourth horizontal walls 41 to 44 may overlap in the up-down direction C so that the lower end of the rear hanging plate 51c overlaps with the multiple first to fourth horizontal walls 41 to 44 and the upper ends of the multiple first to fourth horizontal walls 41 to 44 overlap with the rear hanging plate 51c in the front-to-back direction B.

[0039] 7, the cover plate portion 52 has a top plate (second top plate) 52a, a front hanging plate (second front hanging plate) 52b, and a rear hanging plate (second rear hanging plate) 52c, and is formed in an inverted U shape that opens downward. The top plate 52a, the front hanging plate 52b, and the rear hanging plate 52c extend in the left-right direction A.

[0040] 6, top plate 52a is a plate-like portion that is disposed parallel to bottom wall 35 when cover plate portion 52 is combined with main body portion 30. Front hanging plate 52b and rear hanging plate 52c extend perpendicular to top plate 52a. Front hanging plate 52b is a plate-like portion that stands upright from the rear end of top plate 52a, and rear hanging plate 52c is a plate-like portion that stands upright from the front end of top plate 52a.

[0041] The length of front hanging plate 52b from top plate 52a in the up-down direction C is longer than the length of rear hanging plate 52c from top plate 52a in the up-down direction C. Furthermore, when cover plate portion 52 is combined with main body portion 30, front hanging plate 52b fits into slit 39 and is spaced apart from rear wall 34 and fourth lateral wall 44 in the front-to-rear direction B, with its lower end located near the bottom of slit 39. In other words, when cover plate portion 52 is combined with main body portion 30, the lower end of front hanging plate 52b is located lower in the up-down direction C than the upper ends of the plurality of first lateral walls 41 to fourth lateral walls 44. Note that, when cover plate portion 52 is combined with main body portion 30, the lower end of front hanging plate 52b and the upper ends of the plurality of first lateral walls 41 to fourth lateral walls 44 may be located at the same height level in the up-down direction C.

[0042] When the cover plate 52 is assembled with the main body 30, the rear hanging plate 52c fits into the slit 38, is spaced apart from the third lateral wall 43 and the fourth lateral wall 44 in the front-to-rear direction B, and has its lower end located near the bottom of the slit 38. In other words, when the cover plate 52 is assembled with the main body 30, the lower end of the rear hanging plate 52c is located at the same height level in the up-down direction C as the upper ends of the first to fourth lateral walls 41 to 44. Note that when the cover plate 52 is assembled with the main body 30, the rear hanging plate 52c and the first to fourth lateral walls 41 to 44 may overlap each other in the up-down direction C such that the lower end of the rear hanging plate 52c overlaps with the first to fourth lateral walls 41 to 44 and the upper ends of the first to fourth lateral walls 41 to 44 overlap with the rear hanging plate 52c in the front-to-rear direction B.

[0043] Front hanging plate 51b and front hanging plate 52b have approximately the same length in the vertical direction C from top plates 51a, 52a. Rear hanging plate 51c and rear hanging plate 52c have approximately the same length in the vertical direction C from top plates 51a, 52a. Cover plate 51 can be rotated 180 degrees around a rotation axis extending in the vertical direction C and combined with main body 30 as cover plate 52. In other words, cover plate 51 and cover plate 52 are common members and can be used interchangeably.

[0044] 2, the cover plate 51 is fitted onto the main body 30 from above so that its front hanging plate 51b covers the front wall 31. Then, with the flashing 2 placed over the ventilation flashing 3, the front hanging portion 2c is fastened with screws from the front side, thereby fixing the front hanging portion 2c to the front wall 31 and the front hanging plate 51b and fixing the cover plate 51 to the main body 30. Note that the screws may be fastened at multiple locations at appropriate intervals in the left-right direction A.

[0045] 7, the airtight material 55 is a strip-shaped sheet material extending in the left-right direction A. In this embodiment, the airtight material 55 is made of foamed rubber obtained by foaming EPDM (ethylene propylene diene rubber), but may also be made of other rubber materials or soft resins.

[0046] Next, a method for attaching the rain flashing ventilation unit 1 to the joint 103 between the exterior wall 101 and the eaves 102 will be described below. First, the rain flashing ventilation member 3 is assembled. That is, as shown in FIG. 4, an airtight material 55 is attached to the underside of the main body 30 (the rear end portion of the underside of the first bottom plate 35a) with an adhesive such as double-sided tape. Then, the two cover plates 51, 52 are assembled to the main body 30 from above so that the two cover plates 51, 52 change from the state shown in FIG. 7 to the state shown in FIG. 2. That is, the rear hanging plate 51c of the cover plate 51 is fitted into the slit 37, while the front hanging plate 51b covers the entire front surface of the front wall 31, and the front hanging plate 52b of the cover plate 52 is fitted into the slit 39, while the rear hanging plate 52c is fitted into the slit 38.

[0047] By assembling the cover plate 51 to the main body 30 in this manner and covering the upper portions of the plurality of openings 35d, the plurality of openings 35d are formed as ventilation openings only on the underside of the front end of the ventilation flashing 3. The plurality of openings 35d are arranged between the right wall 32 and the partition wall 36, between the plurality of partition walls 36, and between the left wall 33 and the partition wall 36. Furthermore, by assembling the cover plate 52 to the main body 30, the plurality of openings 35e that open rearward and upward are formed at the upper rear end of the ventilation flashing 3, as shown in FIG. 3 . The plurality of openings 35e are also arranged side by side in the left-right direction A, similar to the plurality of openings 35d. More specifically, the plurality of openings 35e are arranged between the right wall 32 and the partition wall 36, between the plurality of partition walls 36, and between the left wall 33 and the partition wall 36, corresponding to the plurality of openings 35d.

[0048] Next, as shown in FIG. 1 , the second bottom plate portion 35b of the rear end portion of the ventilation flashing 3 is raised above the sheathing board 112 and positioned on the rear side (indoor side) of the wooden underlayment 114, while the first bottom plate portion 35a of the ventilation flashing 3 is positioned on the upper surface of the wooden underlayment 114 that protrudes above the upper surface of the roofing material 113 via the airtight material 55, thereby installing the ventilation flashing 3 at the joint 103. By positioning the ventilation flashing 3 on the upper surface of the wooden underlayment 114, the front end of the first bottom plate portion 35a is spaced from the roofing material 113 by the amount that the wooden underlayment 114 protrudes above the upper surface of the roofing material 113, forming a space between the opening 35d and the roofing material 113. The hole 104 is elongated in the left-right direction A at the joint 103 between the exterior wall 101 and the eaves 102. The hole 104 also communicates with the attic space 115 of the eaves 102. In addition, since the rain flashing ventilation material 3 is made up of the main body portion 3 made of resin and the cover plate portions 51, 52 made of metal plates, the length in the left-right direction A can be easily adjusted by cutting it or the like.

[0049] Next, the ventilation flashing 3 is fixed to the eaves 102 with screws (not shown). The screws are threaded through the through holes 45a of the ventilation flashing 3 and into the wooden base 114. Nails may be used instead of screws. The ventilation flashing 2 is then placed so as to cover the ventilation flashing 3 from above. At this time, the upper extension portion 2b covers the entire top surface of the ventilation flashing 3, and the mounting plate portion 2a is fixed to the base material 105 with nails, screws, etc. via a moisture-permeable waterproof sheet. The front hanging portion 2c covers the front hanging plate 51b and is screwed to the front wall 31 and the front hanging plate 51b.

[0050] In this way, the entire upper surface and the front hanging plate 51b of the ventilation flashing 3 are covered by the flashing 2, thereby forming the ventilation flashing unit 1. The opening 35e at the rear end of the ventilation flashing 3 becomes an opening that opens to the rear when its upper part is sealed by the flashing 2. The ventilation flashing unit 1 is formed with a plurality of ventilation passages 120 (paths indicated by two-dot chain lines within the ventilation flashing 3 in FIG. 1 ) connecting the opening 35d at the front end and the opening 35e at the rear end. The ventilation passages 120 are paths formed inside the ventilation flashing 3.

[0051] A plurality of ventilation passages 120 are formed in the left-right direction A, respectively, between the right wall 32 and the partition wall 36, between the plurality of partition walls 36, and between the left wall and the partition wall 36. Each ventilation passage 120 is routed between the extension 2b of the flashing 2 and the top plates 51a, 52a of the cover plates 51, 52 and the bottom wall 35, passing through the front wall 31, the rear wall 34, the first to fourth horizontal walls 41, 44, the front hanging plate 51b, and the rear hanging plate 51c, 52c. The arrangement of the flashing 3 between the flashing 2 and the eaves 102 in this manner defines a plurality of ventilation passages 120. Each ventilation passage 120 is formed by connecting the portion between each cover plate 51, 52 and the main body 30 with the portion between the flashing 2 and the main body 30.

[0052] In this way, the rain flashing ventilation unit 1 is attached to the joint 103. After this, the vertical furring strips 108 and the siding 109 are fixed to the base material 105, and the building 100 is assembled.

[0053] As described above, in the ventilation flashing material 3 of this embodiment, the main body 30 is made of synthetic resin. This improves the handleability of the main body 30 and the ease of installation of the ventilation flashing material 3. Furthermore, because the ventilation flashing material 3 has a curved ventilation passage 120 inside, it is possible to prevent rainwater from entering the attic space 115 of the roof 102 through the ventilation passage 120.

[0054] An opening 35d is formed at the front end of the underside of the main body 30 as a ventilation opening that communicates with the ventilation passage 120. As a result, the opening 35d is formed facing downward, so that rainwater can be effectively prevented from entering the ventilation passage 120.

[0055] Furthermore, since the cover plate portion (first cover plate portion) 51 is made of a metal plate, the flashing material 2 made of sheet metal may be fastened with screws to the front hanging plate (first front hanging plate) 51b of the cover plate portion 51. This prevents the front portion of the flashing material 2 from being rolled up or deformed by the wind. In addition, a curved ventilation passage 120 is formed between the main body portion 30 and the cover plate portion 51. This makes it possible to prevent rainwater from entering the attic space 115 of the roof shed 102 through the ventilation passage 120.

[0056] In addition, the cover plate portion (second cover plate portion) 52 is also placed over and combined with the main body portion 30, and a circuitous ventilation passage 120 is formed between the main body portion 30 and the cover plate portion 52. This makes it possible to further prevent rainwater from entering the attic space 115 of the eaves 102 through the ventilation passage 120. In addition, the cover plate portions 51 and 52 can be used as a common accessory, which makes it possible to prevent an increase in the number of differently shaped parts.

[0057] Furthermore, because the main body 30 is made of synthetic resin, it is easier to form multiple side walls, such as the first side wall 41 to the fourth side wall 44, on the main body 30 than if the main body 30 were made by processing a steel plate. The side walls can also be made to have complex shapes, and the ventilation passage 120 can also be curved in a more complex manner. This further prevents rainwater from entering the attic space 115 of the roof 102 via the ventilation passage.

[0058] Furthermore, since the main body 30 is made of synthetic resin, the manufacturing cost can be reduced compared to manufacturing the main body 30 by processing a steel plate.

[0059] Furthermore, the rear hanging plates 51c, 52c and the first to fourth horizontal walls 41 to 44 that form the detour of the ventilation passage 120 have their lower ends at the same height level in the vertical direction C as the upper ends of the rear hanging plates 51c, 52c and the upper ends of the horizontal walls 41 to 44. This makes it possible to further prevent rainwater from entering the attic space 115 even if rainwater enters the ventilation passage 120 through the opening 35d. Note that the more the lower ends of the rear hanging plates 51c, 52c and the upper ends of the horizontal walls 41 to 44 overlap in the vertical direction C, the more effectively rainwater that has entered the ventilation passage 120 is prevented from entering the attic space 115.

[0060] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and various modifications are possible within the scope of the claims. For example, although the rain flashing ventilating material 3 in the above-described embodiment has two cover plate portions 51 and 52, it may have only one of them. Also, the two cover plate portions 51 and 52 may be integrated. That is, for example, the top plate 51a of the two cover plate portions 51 and the top plate 52a of the cover plate portion 52 may be connected to each other. Each cover plate portion 51 and 52 may have one top plate 51a and one hanging plate.

[0061] Furthermore, the main body 30 has the first to fourth horizontal walls 41 to 44, but it is sufficient if it has at least any one of the horizontal walls. Furthermore, the first horizontal walls 41, the second horizontal walls 42, the third horizontal walls 43, and the fourth horizontal walls 44 may be connected to each other along the left-right direction A. Furthermore, the openings 35d may be connected to each other along the left-right direction A.

[0062] In the above-described embodiment, the front flap portion 2c of the flashing material 2 is screwed to the front wall 31 of the main body 30 together with the front hanging plate 51b of the cover plate 51. However, the front flap portion 2c may be adhesively fixed to the front hanging plate 51b with caulking or other adhesive. In this case, it is more preferable to fix the cover plate 51 to the main body 3. The present invention provides a flashing installation method or an attic ventilation structure (building structure) in which the front end of the flashing (material) (e.g., the front flap portion 2c) is fixed to the front end of the flashing ventilation material. In this case, the front end of the flashing ventilation material has a synthetic resin wall, and the front end of the flashing is fixed directly or indirectly to this synthetic resin wall.

[0063] In addition, in the above-mentioned embodiment, an example was described in which the ventilation material 3 of the present invention was used for ventilation in the attic of a lower roof, but the ventilation material 3 of the present invention can also be placed under a ridge cover material (rain gutter material) and used for ventilation in the attic (soffit). [Explanation of symbols]

[0064] 1. Rain gutter ventilation unit 2 Rain cover material 3. Rainproof ventilation material 30 Main body 31 Front wall 35 Bottom wall 35d opening (ventilation opening) 41 First Side Wall 42 Second Side Wall 51 Cover plate portion (first cover plate portion) 51a Top plate (first top plate) 51b Front hanging plate (1st front hanging plate) 51c Rear hanging plate (1st rear hanging plate) 52 カバー Plate Part (2nd カバー Plate Part) 52a Top plate (2nd top plate) 52b Front Drop Plate (Second Front Drop Plate) 52c Rear Drop Plate (Second Rear Drop Plate) 101 outer wall 102 Lower House 103 Joint 120 replacement channel A. Left and right directions B. Forward and backward directions C Up and down direction

Claims

1. A rain flashing ventilation material having a main body portion having a lateral wall rising upward from a bottom wall and extending in the left-right direction, and a hanging plate hanging from a top plate and extending in the left-right direction, and a cover plate portion having a long length in the left-right direction, and the cover plate portion is combined from above the main body portion to form a ventilation passage that is curved inside, A rain gutter ventilation material characterized in that the main body is made of synthetic resin and the cover plate is made of metal plate.

2. a main body portion made of synthetic resin and elongated in the left-right direction; and a cover plate portion made of a metal plate and elongated in the left-right direction, which is combined with the main body portion from above, The main body portion has a bottom wall and a side wall rising upward from the bottom wall and extending in the left-right direction, the cover plate portion has a top plate and a hanging plate hanging down from the top plate and extending in the left-right direction, The rain flashing ventilation material is characterized in that the side wall and the hanging plate are arranged at a distance from each other in the front-to-rear direction, and a curved ventilation passage is formed inside.

3. 3. The ventilation flashing according to claim 1, wherein a ventilation opening communicating with the ventilation passage is formed at a front end of the underside of the main body.

4. a main body portion made of synthetic resin and elongated in the left-right direction; and a first cover plate portion made of a metal plate and elongated in the left-right direction; the main body portion has a bottom wall, a front wall rising upward from a front end of the bottom wall and extending in the left-right direction, and a first lateral wall rising upward from the bottom wall rearward of the front wall in the front-rear direction and extending in the left-right direction, The first cover plate portion has a first top plate, a first front hanging plate hanging down from the front end of the first top plate and extending in the left-right direction, and a first rear hanging plate hanging down from the rear end of the first top plate and extending in the left-right direction, and is attached to the main body portion by covering the main body portion with the first front hanging plate covering the front wall and the first rear hanging plate spaced apart from the first side wall and the bottom wall.

5. Further provided is a second cover plate portion made of a metal plate that is disposed rearward of the first cover plate portion and is elongated in the left-right direction, the main body further includes a second lateral wall rising upward from the bottom wall rearward of the first lateral wall and the first rear hanging plate and extending in the left-right direction, The second cover plate portion has a second top plate, a second front hanging plate hanging down from the front end of the second top plate and extending in the left-right direction, and a second rear hanging plate hanging down from the rear end of the second top plate and extending in the left-right direction, and the second front hanging plate and the second rear hanging plate are placed over the main body portion while being spaced apart from the second side wall and the bottom wall, and are combined with the main body portion.

6. A ventilation structure for an attic space, comprising: a rain flashing ventilation material having a ventilation passageway, the ventilation passageway being arranged so as to communicate with an attic space; and a rain flashing material arranged to cover the rain flashing ventilation material from above. The rain flashing ventilation material has a front wall made of synthetic resin, The flashing is made of a metal plate and has an extension portion that covers the flashing ventilation material from above, and a front flap portion that is bent downward from a front end of the extension portion and covers the front wall of the flashing ventilation material, The attic ventilation structure is characterized in that the front flap portion of the flashing material is fixed to the front wall of the flashing ventilation material.

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