JP7473366B2 - Water drainage member and its mounting structure - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act Waterproofing Design for Medium and Large-Scale Urban Wooden Buildings ARCHITECTS' HANDBOOK [Press Release Version], Page 32 Publisher: Tajima Roofing Co., Ltd. Distribution date: November 5, 2019 (Issue date: November 8, 2019) [Publications, etc.] CLT Forum 2019 Held date: November 5, 2019 [Publications, etc.] Wood Use Promotion Seminar Vol. 9 "Possibilities of Wooden Architecture in the Age of the Global Environment: From Efforts in Japan and the World" Held date: November 8, 2019 [Publications, etc.] Website address: http://tajima-tinet.jp/member Posted date: November 21, 2019

The present invention relates to a water drainage member and its mounting structure for waterproofing (rainproofing) the intersection between the exterior wall material (siding board) and the roof waterproofing layer of a wooden building with a flat roof.

Traditionally, the roofs of wooden buildings have mainly been sloped, as seen in many detached houses. The reason for this is that compared to reinforced concrete buildings, wooden buildings are more likely to shake during an earthquake, and the shaking deformation can cause damage to the waterproofing layer, posing a risk of leaks, and sloped roofs have traditionally been preferred.

However, in recent years, due to the introduction of rooftop greenery on wooden buildings (Patent Document 1) and the enforcement of a law to actively use wood in public buildings (Law Concerning the Promotion of the Use of Wood in Public Buildings, etc.), there is a growing demand for wooden building roofs to be flat rather than limited to sloped roofs.

In the case of a sloped roof, the joint with the exterior wall is protected by eaves and is not directly exposed to wind and rain, and the structure is designed to be less prone to problems even without ensuring watertightness (Patent Document 2), or there are structures in which simple drainage members are installed (Patent Documents 3 and 4), but neither of these require high waterproofing (rainproofing).

On the other hand, in the case of flat roofs, the connection between the exterior wall material and the roof waterproofing layer is directly exposed to wind and rain, so it is necessary to ensure high waterproofing (rainproofing).

In the case of a flat roof with reinforced concrete structure, the waterproofing layer ends are protected from the elements by installing a metal drip-proofing member made of a single metal plate bent into an L shape, followed by a coping. However, to apply this method to wooden buildings, some ingenuity is required, such as making the member shape smaller and reducing the size of the screws and screw holes.

As another method, for example, Patent Document 5 discloses a method in which the ends of a urethane waterproof coating are made into a drainage structure using a waterproof sheet. However, this method has the disadvantage that the material of the waterproof layer is limited.

As described above, flat roofs have been rare in wooden buildings to date, and sufficient consideration has not been given to rainproofing the joints between the exterior wall materials and the roof waterproofing layer, so optimal drainage materials have not been supplied.

JP 2005-113659 A JP 2005-282336 A Japanese Utility Model Application Publication No. 4-132122 Japanese Utility Model Application Publication No. 4-73133 JP 2015-151810 A

The objective of the present invention is to provide a highly aesthetically pleasing guttering member and its mounting structure that ensures waterproofing of the connection between the exterior wall material of a flat roof of a wooden building and the roof waterproofing layer, and is not limited to the material of the roof waterproofing layer.

In order to solve the above problems, the first invention is a guttering member for a flat roof of a wooden structure building, for covering the connection between an exterior wall material and a roof waterproofing layer, characterized in that the guttering member has an enveloping portion that envelops the structural ventilation hardware and vertical furring strips installed at the upper end of the exterior wall material, and a base portion that contacts the upper or lower surface of the roof waterproofing layer.
The second invention is an attachment structure for the water drainage member of the first invention, characterized in that the space between the structural ventilation hardware and the upper end of the exterior wall material is sealed, the upper end of the vertical furring strip and the upper surface of the structural ventilation hardware are installed horizontally, the water drainage member is positioned so that the structural ventilation hardware fits into the enveloping portion, and the base portion is fixed with screws.

The present invention includes the following embodiments.
[1] A guttering member for a flat roof of a wooden structure building intended to cover the connection between an exterior wall material and a roof waterproofing layer, the guttering member having an enveloping portion that envelops the structural ventilation hardware and vertical furring strips installed at the upper end of the exterior wall material, and a base portion that contacts the upper or lower surface of the roof waterproofing layer.
[2] A drainage member as described in [1], characterized in that the base part is provided with screw holes and rubber gaskets for fixing.
[3] A drainage member as described in [1] or [2], characterized in that the apparent length extending downward from the front end of the top edge of the encasing portion parallel to the exterior wall material is 15 to 30 mm.
[4] A drainage member set for a flat roof of a wooden structure building, comprising the drainage member according to any one of [1] to [3] and a cover member for covering at least the enveloping portion.
[5] A drainage member set as described in [4], characterized in that the apparent length extending downward from the front end of the top edge of the cover member parallel to the exterior wall material is 25±5 mm.
[6] An installation structure for a drainage member described in any one of [1] to [3], characterized in that the space between the structural ventilation hardware and the upper end of the exterior wall material is sealed, the upper end of the vertical furring strip and the upper surface of the structural ventilation hardware are installed horizontally, the drainage member is positioned so that the structural ventilation hardware fits within the enveloping portion, and the base portion is fixed with screws.
[7] A mounting structure for a drainage member described in [6], characterized in that a cover member is installed to cover at least the joint portion of the drainage member.

The water drainage member of the present invention can adequately ensure waterproofing (rainproofing) of the portion spanning the roof waterproof layer and the exterior wall, and since there are no limitations on the material of the roof waterproof layer and it has good design properties, it is suitable for waterproofing the flat roofs of wooden buildings.

FIG. 1 shows a draining member according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view of a cover member used with the draining member of the first embodiment of the present invention. FIG. 3 is a cross-sectional view of the draining member set according to the first embodiment of the present invention. FIG. 4 shows a draining member according to a second embodiment of the present invention. FIG. 5 is a cross-sectional view of a cover member that can be used with the draining member of the second embodiment of the present invention. FIG. 6 is a cross-sectional view of a draining member set according to a second embodiment of the present invention. FIG. 7 is a partially cutaway perspective view of the mounting structure for the draining member according to the first embodiment of the present invention. FIG. 8 is a cross-sectional view of the mounting structure of the drain member according to the first embodiment of the present invention. FIG. 9 is a partially cutaway perspective view of a mounting structure for a draining member according to a second embodiment of the present invention. FIG. 10 is a cross-sectional view of a mounting structure for a draining member according to the second embodiment of the present invention.

The present invention will be described in detail below with reference to the drawings, but the present invention is not limited to those shown in the drawings.

FIG. 1 shows a first embodiment of the water-repellent member of the present invention. FIG. 1 (a) is a cross-sectional view, and FIG. 1 (b) is a plan view. The water-repellent member 1 has an enveloping portion 2 that envelops the structural ventilation metal fittings and the vertical furring strips installed at the upper end of the exterior wall material, and a base portion 3 that is a portion that contacts the upper or lower surface of the roof waterproofing layer. The water-repellent member 1 has a longitudinal direction Y and a width direction X. The base portion 3 is made of a first horizontal plate portion 11 that extends horizontally. The enveloping portion 2 has a first vertical plate portion 21 that extends vertically upward from one long side of the first horizontal plate portion 11, a second horizontal plate portion 12 that extends horizontally from the upper side of the first vertical plate portion 21 in the opposite direction to the first horizontal plate portion 11, and a second vertical plate portion 22 that extends vertically downward from the long side of the second horizontal plate portion 12 opposite to the first vertical plate portion 21. The drainage member 1 further has a third horizontal plate portion 13 extending horizontally from the upper edge of the first vertical plate portion 21 in the opposite direction to the second horizontal plate portion 12, and a third vertical plate portion 23 extending vertically downward from the long side of the third horizontal plate portion 13 opposite the first vertical plate portion 21.
The provision of the third horizontal plate portion 13 and the third vertical plate portion 23 has the advantage of protecting the ends of the waterproof layer.

The material of the drainage member in the first embodiment is not limited, but extrusion aluminum alloy A6063S is preferred.

The dimensions of the draining member 1 of the first embodiment are preferably within the following ranges.
Width W 11 of the first horizontal plate portion ₁₁ = 110.0 to 130.0 mm
Width W 12 of second horizontal plate portion ₁₂ = 60.0 to 80.0 mm
Width W 13 of third horizontal plate portion ₁₃ = 25.0 to 40.0 mm
Height H 21 of the first vertical plate portion ₂₁ = 25.0 to 38.0 mm
Height H 22 of the second vertical plate portion ₂₂ = 20.0 to 30.0 mm
Height H 23 of the third vertical plate portion ₂₃ = 8.0 to 24.0 mm
Thickness T 11 of the first horizontal plate portion ₁₁ =1.2 to 2.5 mm
Thickness T 12 of the second horizontal plate portion ₁₂ = 1.2 to 2.5 mm
Thickness T 13 of the third horizontal plate portion ₁₃ = 1.2 to 2.5 mm
Thickness T ₂₁ of the first vertical plate portion 21 = 1.2 to 2.5 mm
Thickness T 22 of the second vertical plate portion ₂₂ = 1.2 to 2.5 mm
Thickness T 23 of the third vertical plate portion ₂₃ = 1.2 to 2.5 mm
Length of drain member 1 L ₁ = 1,500 to 2,500 mm

More preferably, the dimensions of the draining member 1 of the first embodiment are within the following ranges.
Width W 11 of the first horizontal plate portion ₁₁ =115.0 to 125.0 mm
Width W 12 of second horizontal plate portion ₁₂ = 65.0 to 70.0 mm
Width W 13 of third horizontal plate portion ₁₃ = 30.0 to 34.0 mm
Height H 21 of the first vertical plate portion ₂₁ = 28.0 to 34.0 mm
Height H 22 of the second vertical plate portion ₂₂ = 24.0 to 26.0 mm
Height H 23 of the third vertical plate portion ₂₃ = 10.0 to 15.0 mm
Thickness T 11 of the first horizontal plate portion ₁₁ =1.5 to 2.5 mm
Thickness T 12 of the second horizontal plate portion ₁₂ = 1.5 to 2.5 mm
Thickness T 13 of the third horizontal plate portion ₁₃ = 1.5 to 2.5 mm
Thickness T ₂₁ of the first vertical plate portion 21 = 1.5 to 2.5 mm
Thickness T 22 of the second vertical plate portion ₂₂ = 1.5 to 2.5 mm
Thickness T 23 of the third vertical plate portion ₂₃ = 1.5 to 2.5 mm
Length of drain member 1 L ₁ = 1,500 to 2,500 mm

Most preferably, the dimensions of the draining member 1 of the first embodiment are as follows:
Width W 11 of the first horizontal plate portion ₁₁ = 123.5 mm
Width W 12 of second horizontal plate portion ₁₂ = 71.0 mm
Width W 13 of the third horizontal plate portion ₁₃ = 25.0 mm
Height H 21 of the first vertical plate portion ₂₁ = 34.0 mm
Height H 22 of the second vertical plate portion ₂₂ = 20.0 mm
Height H 23 of the third vertical plate portion ₂₃ = 12.0 mm
Thickness T 11 of the first horizontal plate portion ₁₁ = 2.0 mm
Thickness T ₁₂ of the second horizontal plate portion 12 and the third horizontal plate portion 13 = 1.8 mm
Thickness T 21 of the first vertical plate portion ₂₁ = 2.0 mm
Thickness T 22 of the second vertical plate portion ₂₂ = 1.5 mm
Thickness T 23 of the third vertical plate portion ₂₃ = 2.0 mm
Length of drain member 1 L ₁ = 2000 mm

In the first embodiment, the length of the exterior trim 6 extending downward from the front end of the top edge of the enveloping portion 2 of the drainage member 1 parallel to the exterior wall, in other words, the height of the second vertical plate portion 22 ( _H22 in Figure 1), is preferably 15 to 30 mm. If the length is shorter than this, it will be difficult to ensure watertightness, and conversely, if it is longer, the weight will increase and the finished product will be noticeable, resulting in a poor design.

2 is a cross-sectional view of a cover member used with the draining member of the first embodiment of the present invention. The cover member is also called a fascia. The cover member 8 has a fourth horizontal plate portion 14 extending horizontally, a fourth vertical plate portion 24 extending vertically downward from one long side of the fourth horizontal plate portion 14, a fifth horizontal plate portion 15 extending horizontally from the lower side of the fourth vertical plate portion 24 toward the fourth horizontal plate portion 14 side, a fifth vertical plate portion 25 extending vertically upward from the long side of the fifth horizontal plate portion 15 toward the fourth horizontal plate portion 14 side, a sixth vertical plate portion 26 extending vertically downward from the other long side of the fourth horizontal plate portion 14, and a first inclined plate portion 31 extending diagonally downward from the other long side of the fourth horizontal plate portion 14 toward the opposite side to the fourth vertical plate portion 24.
The sixth vertical plate portion 26 ensures the fixing stability of the washer portion. The first inclined plate portion 31 has the advantage of protecting the end portion of the waterproof layer.

The material of the cover member 8 used with the drain member of the first embodiment is not limited, but is preferably extruded aluminum alloy A6063S.

The dimensions of the cover member 8 used with the draining member of the first embodiment are preferably within the following ranges.
Width W 14 of the fourth horizontal plate portion ₁₄ = 80.0 to 110.0 mm
Width W 15 of the fifth horizontal plate portion ₁₅ = 1.0 to 4.0 mm
Width W 31 of the first inclined plate portion ₃₁ = 12.0 to 20.0 mm
Height H 24 of the fourth vertical plate portion ₂₄ = 20.0 to 30.0 mm
Height H 25 of the fifth vertical plate portion ₂₅ = 3.0 to 7.0 mm
Height H 26 of the sixth vertical plate portion ₂₆ = 4.0 to 8.0 mm
Thickness T 14 of the fourth horizontal plate portion ₁₄ = 1.2 to 2.5 mm
Thickness T 15 of the fifth horizontal plate portion ₁₅ = 1.2 to 2.5 mm
Thickness T 31 of the first inclined plate portion ₃₁ = 1.2 to 2.5 mm
Thickness T 24 of the fourth vertical plate portion ₂₄ = 1.2 to 2.5 mm
Thickness T 25 of the fifth vertical plate portion ₂₅ = 1.2 to 2.5 mm
Thickness T 26 of the sixth vertical plate portion ₂₆ = 1.2 to 2.5 mm
Length of cover member 8 = 1,500 to 2,500 mm

More preferably, the dimensions of the cover member 8 used with the draining member of the first embodiment are within the following ranges.
Width W 14 of the fourth horizontal plate portion ₁₄ = 90.0 to 105.0 mm
Width W 15 of the fifth horizontal plate portion ₁₅ =2.5 to 3.5 mm
Width W 31 of the first inclined plate portion ₃₁ = 14.0 to 18.0 mm
Height H 24 of the fourth vertical plate portion ₂₄ =22.0 to 26.0 mm
Height H 25 of the fifth vertical plate portion ₂₅ = 4.5 to 6.0 mm
Height H 26 of the sixth vertical plate portion ₂₆ = 5.0 to 7.0 mm
Thickness T 14 of the fourth horizontal plate portion ₁₄ = 1.8 to 2.2 mm
Thickness T 15 of the fifth horizontal plate portion ₁₅ = 1.8 to 2.2 mm
Thickness T 31 of the first inclined plate portion ₃₁ = 1.8 to 2.2 mm
Thickness T 24 of the fourth vertical plate portion ₂₄ = 1.8 to 2.2 mm
Thickness T 25 of the fifth vertical plate portion ₂₅ = 1.8 to 2.2 mm
Thickness T 26 of the sixth vertical plate portion ₂₆ = 1.8 to 2.2 mm
Length of cover member 8 = 1,800 to 2,200 mm

Most preferably, the dimensions of the cover member 8 used with the draining member of the first embodiment are as follows:
Width W 14 of the fourth horizontal plate portion ₁₄ = 99.4 mm
Width W 15 of the fifth horizontal plate portion ₁₅ = 5.4 mm
Width W 31 of the first inclined plate portion ₃₁ = 16.0 mm
Height H 24 of the fourth vertical plate portion ₂₄ = 24.8 mm
Height H 25 of the fifth vertical plate portion ₂₅ = 5.2 mm
Height H 26 of the sixth vertical plate portion ₂₆ = 6.0 mm
Thickness T 14 of the fourth horizontal plate portion ₁₄ = 2.0 mm
Thickness T 15 of the fifth horizontal plate portion ₁₅ = 1.2 mm
Thickness T 31 of the first inclined plate portion ₃₁ = 2.0 mm
Thickness T24 of the fourth vertical plate portion ₂₄ = 1.2 mm
Thickness T 25 of the fifth vertical plate portion ₂₅ = 1.2 mm
Thickness T 26 of the sixth vertical plate portion ₂₆ = 1.2 mm
Length of cover member 8 = 2000 mm
The length of the cover member 8 is preferably the same as the length _L1 of the draining member 1.

The length of the exterior trim 6 extending parallel to the exterior wall downward from the front end of the top edge of the cover member 8 used together with the drainage member of the first embodiment, in other words, the height of the fourth vertical plate portion 24 ( _H24 in Figure 2), is preferably 25 ± 5 mm. If the length is shorter than this, it will be difficult to ensure watertightness, and conversely, if it is longer, the weight will increase and the finished product will be noticeable, resulting in a poor design.

Figure 3 is a cross-sectional view of the draining member set 9 of the first embodiment, that is, a cross-sectional view of the draining member 1 combined with the cover member 8. The draining member set 9 includes the draining member 1 and the cover member 8 that covers at least the enveloping portion 2. The cover member 8 can be attached to the draining member 1 by fitting the second vertical plate portion 22 of the draining member 1 into the recess formed by the fourth vertical plate portion 24, the fifth horizontal plate portion 15, and the fifth vertical plate portion 25 of the cover member 8, and then overlapping the fourth horizontal plate portion 14 of the cover member 8 on the second horizontal plate portion 12 and the third horizontal plate portion 13 of the draining member 1.

Fig. 7 is a partially cutaway perspective view of the attachment structure for the draining member according to the first embodiment of the present invention, and Fig. 8 is a cross-sectional view of the attachment structure for the draining member according to the first embodiment of the present invention.
The flashing member 1 of the present invention is a flashing member for a flat roof of a wooden building, and is intended to cover the connection between an exterior wall material 71 and a roof waterproofing layer 72. The enveloping portion 2 of the flashing member 1 envelops a structural ventilation metal fitting 73 and a vertical furring strip 74 that are installed at the upper end of the exterior wall material 71. The base portion 3 of the flashing member 1 is in contact with the lower surface of the roof waterproofing layer 72. The cover member 8 covers at least the enveloping portion 2 of the flashing member 1. The cover member 8 is installed over the entire length of the flashing member 1. The gap between the structural ventilation metal fitting 73 and the upper end of the exterior wall material 71 is sealed with a sealant 75. The upper end of the vertical furring strip 74 and the upper surface of the structural ventilation metal fitting 73 are installed horizontally. The flashing member 1 is arranged so that the structural ventilation metal fitting 73 fits into the enveloping portion 2. The base portion 3 is fixed with an adhesive tape 76 and a screw 77. In the drawing, 78 is butyl tape, 79 is a moisture-permeable waterproof sheet, 80 is lumber, 81 is structural plywood, 82 is structural plywood, 83 is heat insulating material, and 84 is screws. The butyl tape 78 is used to fix the end of the moisture-permeable waterproof sheet 79 and is a member that connects with the roof waterproof layer 72 and adhesive tape 76 above it, but it may be replaced with a bent thin metal sheet, and the edge of the moisture-permeable waterproof sheet 79 on the wall surface or the waterproof sheet may be cut under the metal sheet.

Figure 4 shows a second embodiment of the water-repellent member of the present invention. Figure 4 (a) is a cross-sectional view taken along line II-II, and (b) is a plan view. The water-repellent member 1 has an enveloping portion 2 that envelops the structural ventilation metal fittings and vertical furring strips that are installed at the upper end of the exterior wall material, and a base portion 3 that contacts the upper or lower surface of the roof waterproofing layer. The water-repellent member 1 has a longitudinal direction Y and a width direction X. The base portion 3 has an eleventh horizontal plate portion 41 extending horizontally, an eleventh vertical plate portion 51 extending vertically downward from one long side of the eleventh horizontal plate portion 41, a twelfth horizontal plate portion 42 extending horizontally in both width directions from the lower side of the eleventh vertical plate portion 51, an eleventh inclined plate portion 61 extending diagonally downward from the other long side of the eleventh horizontal plate portion 41 on the opposite side to the eleventh vertical plate portion 51, and a thirteenth horizontal plate portion 43 extending horizontally from the lower side of the eleventh inclined plate portion 61 on the opposite side to the eleventh vertical plate portion 51. The enveloping portion 2 has a twelfth vertical plate portion 52 extending vertically upward from one of the long sides of the eleventh horizontal plate portion 41, a twelfth inclined plate portion 62 extending diagonally downward from the upper side of the twelfth vertical plate portion 52 on the side opposite the eleventh horizontal plate portion 41, a thirteenth vertical plate portion 53 extending vertically downward from the long side of the twelfth inclined plate portion 62 on the side opposite the twelfth vertical plate portion 52, a fourteenth horizontal plate portion 44 extending horizontally from the lower side of the thirteenth vertical plate portion 53 toward the twelfth vertical plate portion 52, and a fourteenth vertical plate portion 54 extending vertically upward from the long side of the fourteenth horizontal plate portion 44 on the twelfth vertical plate portion 52 side. The draining member 1 further has a screw hole 4 in the eleventh horizontal plate portion 41, and a rubber packing 5 is attached to the lower surface of the eleventh horizontal plate portion 41.
The inclination of the upper surface of the enveloping portion 2 (i.e., the twelfth inclined plate portion 62) has the advantage of improving the efficiency of rainproofing and water drainage. The inclination angle of the twelfth inclined plate portion 62 with respect to the horizontal direction is preferably 6 to 8 degrees.
By attaching the rubber gasket 5 to the foundation portion 3, there is an advantage that the watertightness of the screw holes is improved.

The material of the drainage member in the second embodiment is not limited, but extrusion aluminum alloy A6063S is preferred.

The dimensions of the draining member 1 of the second embodiment are preferably within the following ranges.
Width W 41 of the eleventh horizontal plate portion ₄₁ = 30.0 to 50.0 mm
Width W 42 of the twelfth horizontal plate portion ₄₂ = 2.0 to 8.0 mm
Width W 43 of the thirteenth horizontal plate portion ₄₃ = 3.0 to 7.0 mm
Width W 44 of the fourteenth horizontal plate portion ₄₄ = 2.0 to 4.0 mm
Width W 62 of the twelfth inclined plate portion ₆₂ = 50.0 to 80.0 mm
Height H 51 of the eleventh vertical plate portion ₅₁ = 7.0 to 14.0 mm
Height H 52 of the twelfth vertical plate portion ₅₂ =8.0 to 12.0 mm
Height H 53 of the thirteenth vertical plate portion ₅₃ = 20.0 to 35.0 mm
Height H 54 of the fourteenth vertical plate portion ₅₄ = 2.0 to 6.0 mm
Height H 61 of the eleventh inclined plate portion ₆₁ =6.0 to 10.0 mm
Thickness T 41 of the eleventh horizontal plate portion ₄₁ = 1.2 to 2.5 mm
Thickness T 42 of the twelfth horizontal plate portion ₄₂ = 1.2 to 2.5 mm
Thickness T 43 of the thirteenth horizontal plate portion ₄₃ = 1.2 to 2.5 mm
Thickness T 44 of the fourteenth horizontal plate portion ₄₄ = 1.2 to 2.5 mm
Thickness T 51 of the eleventh vertical plate portion ₅₁ = 1.2 to 2.5 mm
Thickness T 52 of the twelfth vertical plate portion ₅₂ = 1.2 to 2.5 mm
Thickness T 53 of the thirteenth vertical plate portion ₅₃ = 1.2 to 2.5 mm
Thickness T 54 of the fourteenth vertical plate portion ₅₄ = 1.2 to 2.5 mm
Thickness T 61 of the eleventh inclined plate portion ₆₁ = 1.2 to 2.5 mm
Thickness T 62 of the twelfth inclined plate portion ₆₂ = 1.2 to 2.5 mm
Width W 5 of rubber packing ₅ = 20.0 to 50.0 mm
Height H 5 of rubber packing ₅ = 6.0 to 12.0 mm
Length of rubber packing 5 L ₅ = 1,500 to 2,500 mm
Length L ₄ of draining member 1 = 1,500 to 2,500 mm

More preferably, the dimensions of the draining member 1 of the second embodiment are within the following ranges.
Width W 41 of the eleventh horizontal plate portion ₄₁ = 38.0 to 42.0 mm
Width W 42 of the twelfth horizontal plate portion ₄₂ = 4.0 to 6.0 mm
Width W 43 of the thirteenth horizontal plate portion ₄₃ = 5.2 to 5.7 mm
Width W 44 of the fourteenth horizontal plate portion ₄₄ = 2.5 to 3.8 mm
Width W 62 of the twelfth inclined plate portion ₆₂ = 62.0 to 66.0 mm
Height H 51 of the eleventh vertical plate portion ₅₁ =8.0 to 12.0 mm
Height H 52 of the twelfth vertical plate portion ₅₂ =8.0 to 12.0 mm
Height H 53 of the thirteenth vertical plate portion ₅₃ = 23.0 to 27.0 mm
Height H 54 of the fourteenth vertical plate portion ₅₄ =3.5 to 5.5 mm
Height H ₆₁ of the eleventh inclined plate portion 61 =7.5 to 8.8 mm
Thickness T 41 of the eleventh horizontal plate portion ₄₁ = 1.8 to 2.2 mm
Thickness T 42 of the twelfth horizontal plate portion ₄₂ = 1.8 to 2.2 mm
Thickness T 43 of the thirteenth horizontal plate portion ₄₃ = 1.8 to 2.2 mm
Thickness T 44 of the fourteenth horizontal plate portion ₄₄ = 1.8 to 2.2 mm
Thickness T 51 of the eleventh vertical plate portion ₅₁ = 1.8 to 2.2 mm
Thickness T 52 of the twelfth vertical plate portion ₅₂ = 1.8 to 2.2 mm
Thickness T 53 of the thirteenth vertical plate portion ₅₃ = 1.8 to 2.2 mm
Thickness T 54 of the fourteenth vertical plate portion ₅₄ = 1.8 to 2.2 mm
Thickness T 61 of the eleventh inclined plate portion ₆₁ = 1.8 to 2.2 mm
Thickness T 62 of the twelfth inclined plate portion ₆₂ = 1.8 to 2.2 mm
Width W 5 of rubber packing ₅ = 25.0 to 35.0 mm
Height H 5 of rubber packing ₅ = 9.0 to 11.0 mm
Length of rubber packing 5 L ₅ = 1,800 to 2,200 mm
Length L ₄ of draining member 1 = 1,800 to 2,200 mm

Most preferably, the dimensions of the draining member 1 of the second embodiment are as follows:
Width W 41 of the eleventh horizontal plate portion ₄₁ = 40 mm
Width _W42 of the twelfth horizontal plate portion 42 = 9.5 mm ( _W48 = 3 mm, _W49 = 5 mm)
Width W 43 of the thirteenth horizontal plate portion ₄₃ = 5.4 mm
Width W 44 of the fourteenth horizontal plate portion ₄₄ = 3.0 mm
Width W 62 of the twelfth inclined plate portion ₆₂ = 64.5 mm
Height H 51 of the eleventh vertical plate portion ₅₁ =8.5 mm
Height H 52 of the twelfth vertical plate portion ₅₂ = 10 mm
Height H 53 of the thirteenth vertical plate portion ₅₃ = 25 mm
Height H 54 of the fourteenth vertical plate portion ₅₄ = 5.2 mm
Height H 61 of the eleventh inclined plate portion ₆₁ =8.5 mm
Thickness T 41 of the eleventh horizontal plate portion ₄₁ = 2.0 mm
Thickness T 42 of the twelfth horizontal plate portion ₄₂ = 2.0 mm
Thickness T 43 of the thirteenth horizontal plate portion ₄₃ = 2.0 mm
Thickness T 44 of the fourteenth horizontal plate portion ₄₄ = 2.0 mm
Thickness T 51 of the eleventh vertical plate portion ₅₁ = 1.5 mm
Thickness T 52 of the twelfth vertical plate portion ₅₂ = 1.5 mm
Thickness T 53 of the thirteenth vertical plate portion ₅₃ = 2.0 mm
Thickness T 54 of the fourteenth vertical plate portion ₅₄ = 2.0 mm
Thickness T 61 of the eleventh inclined plate portion ₆₁ = 2.0 mm
Thickness T 62 of the twelfth inclined plate portion ₆₂ = 2.0 mm
Width W5 of rubber packing ₅ = 30.0 mm
Height H5 of rubber packing ₅ = 10.0 mm
Length of rubber packing 5 _L5 = 2000 mm
Length _L4 of drain member 1 = 2000 mm
The inclination of the eleventh inclined plate portion 61 is 5° with respect to the vertical direction.
The inclination of the twelfth inclined plate portion 62 is 7° with respect to the horizontal direction.

In the second embodiment, the length of the exterior portion 6 extending parallel to the exterior wall downward from the front end of the top end of the enveloping portion 2 of the drainage member 1, in other words the height of the 13th vertical plate portion 53 ( _H53 in Figure 1), is preferably 15 to 30 mm, and more preferably 25±5 mm. If it is shorter than this length, it will be difficult to ensure watertightness, and conversely, if it is longer, the weight will increase and the finished product will be noticeable, resulting in a poor design.

The screw hole spacing (the distance from the center of a screw hole to the center of an adjacent screw hole) L ₄₄ is not limited, but is preferably 100 to 600 mm, more preferably 200 to 400 mm, and most preferably 300 mm.

The draining member of the second embodiment can be used as a draining member by itself, but may also be used in combination with a cover member.
5 is a cross-sectional view of a cover member that can be used with the draining member of the second embodiment. The cover member 8 has a fifteenth horizontal plate portion 45 extending horizontally, a thirteenth inclined plate portion 63 extending obliquely downward from one long side of the fifteenth horizontal plate portion 45, a fifteenth vertical plate portion 55 extending vertically upward from the other long side of the fifteenth horizontal plate portion 45, a fourteenth inclined plate portion 64 extending obliquely downward from the upper side of the fifteenth vertical plate portion 55 to the opposite side of the fifteenth horizontal plate portion 45, a sixteenth vertical plate portion 56 extending vertically downward from the lower side of the fourteenth inclined plate portion 64, a sixteenth horizontal plate portion 46 extending horizontally from the lower side of the sixteenth vertical plate portion 56 to the fifteenth vertical plate portion 55 side, and a seventeenth vertical plate portion 57 extending vertically upward from the long side of the sixteenth horizontal plate portion 46 on the fifteenth vertical plate portion 55 side.

The material of the cover member 8 that can be used with the draining member of the second embodiment is not limited, but is preferably A6063S, surface treatment JIS H8602-2010A1 type.

The dimensions of the cover member 8 that can be used with the draining member of the second embodiment are preferably within the following ranges.
Width W 45 of the fifteenth horizontal plate portion ₄₅ = 42.0 to 44.0 mm
Width W 46 of the sixteenth horizontal plate portion ₄₆ = 3.0 to 6.0 mm
Width W 63 of the thirteenth inclined plate portion ₆₃ = 1.0 to 2.0 mm
Width W 64 of the fourteenth inclined plate portion ₆₄ = 60.0 to 70.0 mm
Height H 55 of the fifteenth vertical plate portion ₅₅ = 7.0 to 15.0 mm
Height H 56 of the sixteenth vertical plate portion ₅₆ = 20.0 to 35.0 mm
Height H 57 of the seventeenth vertical plate portion ₅₇ = 3.0 to 8.0 mm
Height H 63 of the thirteenth inclined plate portion ₆₃ = 6.0 to 12.0 mm
Height H 64 of the fourteenth inclined plate portion ₆₄ = 7.0 to 15.0 mm
Thickness T 45 of the fifteenth horizontal plate portion ₄₅ = 1.5 to 2.5 mm
Thickness T 46 of the sixteenth horizontal plate portion ₄₆ = 1.5 to 2.5 mm
The thickness T ₆₃ of the thirteenth inclined plate portion 63 is 1.5 to 2.5 mm.
Thickness T ₆₄ of the fourteenth inclined plate portion 64 = 1.5 to 2.5 mm
Thickness T 55 of the fifteenth vertical plate portion ₅₅ = 1.5 to 2.5 mm
Thickness T 56 of the sixteenth vertical plate portion ₅₆ = 1.5 to 2.5 mm
Thickness T 57 of the seventeenth vertical plate portion ₅₇ = 1.5 to 2.5 mm
The thickness TH ₆₃ of the thirteenth inclined plate portion 63 is 1.5 to 2.5 mm.
The thickness TH ₆₄ of the fourteenth inclined plate portion 64 is 1.5 to 2.5 mm.
Length of cover member 8 = 10.0 to 200.0 mm

More preferably, the dimensions of the cover member 8 that can be used with the draining member of the second embodiment are within the following ranges.
Width W 45 of the fifteenth horizontal plate portion ₄₅ = 35.0 to 45.0 mm
Width W 46 of the sixteenth horizontal plate portion ₄₆ = 2.0 to 5.0 mm
Width W 63 of the thirteenth inclined plate portion ₆₃ = 3.5 to 6.5 mm
Width W 64 of the fourteenth inclined plate portion ₆₄ = 58.0 to 68.0 mm
Height H 55 of the fifteenth vertical plate portion ₅₅ = 7.0 to 15.0 mm
Height H 56 of the sixteenth vertical plate portion ₅₆ = 25.0 to 45.0 mm
Height H 57 of the seventeenth vertical plate portion ₅₇ = 3.0 to 8.0 mm
Height H 63 of the thirteenth inclined plate portion ₆₃ = 7.0 to 10.0 mm
Height H 64 of the fourteenth inclined plate portion ₆₄ = 7.0 to 15.0 mm
Thickness T 45 of the fifteenth horizontal plate portion ₄₅ = 1.5 to 2.5 mm
Thickness T 46 of the sixteenth horizontal plate portion ₄₆ = 1.5 to 2.5 mm
The thickness T ₆₃ of the thirteenth inclined plate portion 63 is 1.5 to 2.5 mm.
Thickness T ₆₄ of the fourteenth inclined plate portion 64 = 1.5 to 2.5 mm
Thickness T 55 of the fifteenth vertical plate portion ₅₅ = 1.5 to 2.5 mm
Thickness T 56 of the sixteenth vertical plate portion ₅₆ = 1.5 to 2.5 mm
Thickness T 57 of the seventeenth vertical plate portion ₅₇ = 1.5 to 2.5 mm
The thickness TH ₆₃ of the thirteenth inclined plate portion 63 is 1.5 to 2.5 mm.
The thickness TH ₆₄ of the fourteenth inclined plate portion 64 is 1.5 to 2.5 mm.
Length of cover member 8 = 10.0 to 300.0 mm

Most preferably, the dimensions of the cover member 8 that can be used with the draining member of the second embodiment are as follows:
Width W 45 of the fifteenth horizontal plate portion ₄₅ = 40.0 mm
Width W 46 of the sixteenth horizontal plate portion ₄₆ = 3.0 mm
Width W 63 of the thirteenth inclined plate portion ₆₃ = 5.5 mm
Width W 64 of the fourteenth inclined plate portion ₆₄ = 65.0 mm
Height H 55 of the fifteenth vertical plate portion ₅₅ =10.0 mm
Height H 56 of the sixteenth vertical plate portion ₅₆ = 25.0 mm
Height H 57 of the seventeenth vertical plate portion ₅₇ = 5.0 mm
Height H 63 of the thirteenth inclined plate portion ₆₃ = 8.5 mm
Height H 64 of the fourteenth inclined plate portion ₆₄ = 10.0 mm
Thickness T 45 of the fifteenth horizontal plate portion ₄₅ = 2.0 mm
Thickness T 46 of the sixteenth horizontal plate portion ₄₆ = 2.0 mm
The thickness T ₆₃ of the thirteenth inclined plate portion 63 is 2.0 mm.
Thickness T 64 of the fourteenth inclined plate portion ₆₄ = 2.0 mm
Thickness T 55 of the fifteenth vertical plate portion ₅₅ = 2.0 mm
Thickness T 56 of the sixteenth vertical plate portion ₅₆ = 2.0 mm
Thickness T 57 of the seventeenth vertical plate portion ₅₇ = 2.0 mm
The thickness of the thirteenth inclined plate portion 63, TH ₆₃ =2.0 mm
The thickness TH ₆₄ of the fourteenth inclined plate portion 64 is 2.0 mm.
Length of cover member 8=50.0 mm

6 is a cross-sectional view of the draining member set 9 of the second embodiment, that is, a cross-sectional view of the draining member 1 combined with the cover member 8. The draining member set 9 includes the draining member 1 and the cover member 8 that covers at least the enveloping portion 2. The cover member 8 can be attached to the draining member 1 by fitting the 14th vertical plate portion 54 and the 14th horizontal plate portion 44 of the draining member 1 into the recess formed by the 16th vertical plate portion 56, the 16th horizontal plate portion 46, and the 17th vertical plate portion 57 of the cover member 8, and then overlapping the 14th inclined plate portion 64 of the cover member 8 on the 12th inclined plate portion 62 and the 11th horizontal plate portion 41 of the draining member 1.
The cover member 8 that can be used with the draining member of the second embodiment does not need to be provided over the entire length of the draining member 1 of the second embodiment. When the cover member 8 is used with the draining member 1 of the second embodiment, it is preferable to install the cover member so as to cover at least the joint portion between the draining members.

Fig. 9 is a partially cutaway perspective view of a mounting structure for a draining member according to a second embodiment of the present invention, and Fig. 10 is a cross-sectional view of the mounting structure for a draining member according to the second embodiment of the present invention.
The water-repellent member 1 of the present invention is a water-repellent member for flat roofs of wooden buildings, and is intended to cover the connection between an exterior wall material 71 and a roof waterproof layer 72. The enveloping portion 2 of the water-repellent member 1 envelops a structural ventilation metal 73 and a vertical furring strip 74 that are installed at the upper end of the exterior wall material 71. The base portion 3 of the water-repellent member 1 is in contact with the upper surface of the roof waterproof layer 72. The space between the structural ventilation metal 73 and the upper end of the exterior wall material 71 is sealed with a sealant 75. The upper end of the vertical furring strip 74 and the upper surface of the structural ventilation metal 73 are installed horizontally. The water-repellent member 1 is arranged so that the structural ventilation metal 73 fits into the enveloping portion 2. The base portion 3 is fixed with a screw 77. In the figure, 78 is a butyl tape, 79 is a moisture-permeable waterproof sheet, 80 is lumber, 81 is structural plywood, 82 is structural plywood, and 83 is a heat insulating material. Although not shown, a cover member 8 may be provided to cover the joints between the drainage members 1 .

There are no limitations on the material of the roof waterproofing layer that can be used in this invention, and examples that can be used include asphalt waterproofing, urethane coating waterproofing, PVC sheet waterproofing, rubber sheet waterproofing, etc.

The drainage member and its mounting structure of the present invention can fully ensure waterproofing (rainproofing) of the part that spans the roof waterproofing layer and the exterior wall, there are no limitations on the material of the roof waterproofing layer, it has excellent design, and is suitable for waterproofing the flat roofs of wooden structure buildings.

The water drainage member of the present invention can be suitably used for waterproofing flat roofs of wooden buildings.

LIST OF SYMBOLS 1 Drain member 2 Enveloping portion 3 Base portion 4 Screw hole 5 Rubber gasket 6 Appearance 8 Cover member 9 Drain member set 11 First horizontal plate portion 12 Second horizontal plate portion 13 Third horizontal plate portion 14 Fourth horizontal plate portion 15 Fifth horizontal plate portion 21 First vertical plate portion 22 Second vertical plate portion 23 Third vertical plate portion 24 Fourth vertical plate portion 25 Fifth vertical plate portion 26 Sixth vertical plate portion 31 First inclined plate portion 41 Eleventh horizontal plate portion 42 Twelfth horizontal plate portion 43 Thirteenth horizontal plate portion 44 Fourteenth horizontal plate portion 45 Fifteenth horizontal plate portion 46 Sixteenth horizontal plate portion 51 Eleventh vertical plate portion 52 Twelfth vertical plate portion 53 Thirteenth vertical plate portion 54 14th vertical board section 55 15th vertical board section 56 16th vertical board section 57 17th vertical board section 61 11th inclined board section 62 12th inclined board section 63 13th inclined board section 64 14th inclined board section 71 Exterior wall material 72 Roof waterproof layer 73 Frame ventilation hardware 74 Vertical furring strip 75 Sealant 76 Adhesive tape 77 Screws 78 Butyl tape 79 Moisture-permeable waterproof sheet 80 Lumber 81 Structural plywood 82 Structural plywood 83 Heat-insulating material 84 Screws

Claims (8)

A water-repellent member for a flat roof of a wooden building structure, for covering a connection between an exterior wall material and a roof waterproofing layer, the water-repellent member has an enveloping portion that envelops a structural ventilation metal fitting and a vertical furring strip that are installed at the upper end of the exterior wall material, and a base portion that contacts the lower surface of the roof waterproofing layer , the base portion being made of a first horizontal plate portion extending horizontally, the enveloping portion being made of a first vertical plate portion extending vertically upward from one long side of the first horizontal plate portion, and a first vertical plate portion extending vertically upward from the upper side of the first vertical plate portion. The drainage member has a second horizontal plate portion extending horizontally from the upper edge of the first vertical plate portion in the opposite direction to the first horizontal plate portion, and a second vertical plate portion extending vertically downward from the long side of the second horizontal plate portion opposite the first vertical plate portion, and the drainage member further has a third horizontal plate portion extending horizontally from the upper edge of the first vertical plate portion in the opposite direction to the second horizontal plate portion, and a third vertical plate portion extending vertically downward from the long side of the third horizontal plate portion opposite the first vertical plate portion . A flashing member for a flat roof of a wooden building structure, for covering a connection portion between an exterior wall material and a roof waterproofing layer, the flashing member having an enveloping portion that envelops a structural ventilation metal fitting and a vertical furring strip that are installed at the upper end of the exterior wall material, and a base portion that contacts an upper surface of the roof waterproofing layer, the base portion having an eleventh horizontal plate portion extending horizontally, an eleventh vertical plate portion extending vertically downward from one long side of the eleventh horizontal plate portion, a twelfth horizontal plate portion extending horizontally in both width directions from a lower side of the eleventh vertical plate portion, an eleventh inclined plate portion extending diagonally downward from the other long side of the eleventh horizontal plate portion on a side opposite to the eleventh vertical plate portion, and a thirteenth horizontal plate portion extending horizontally from the lower side of the eleventh inclined plate portion on a side opposite to the eleventh vertical plate portion. the enveloping portion has a 12th vertical plate portion extending vertically upward from one of the long sides of the 11th horizontal plate portion, a 12th inclined plate portion extending diagonally downward from the upper edge of the 12th vertical plate portion on the side opposite the 11th horizontal plate portion, a 13th vertical plate portion extending vertically downward from the long side of the 12th inclined plate portion on the side opposite the 12th vertical plate portion, a 14th horizontal plate portion extending horizontally from the lower edge of the 13th vertical plate portion toward the 12th vertical plate portion, and a 14th vertical plate portion extending vertically upward from the long side of the 14th horizontal plate portion on the 12th vertical plate portion side, and the drainage member further has screw holes in the 11th horizontal plate portion, and a rubber gasket is attached to the underside of the 11th horizontal plate portion. The drainage member according to claim 1, characterized in that the base portion is provided with screw holes and rubber packing for fixing. A drainage member according to any one of claims 1 to 3, characterized in that the apparent length extending downward from the front end of the top edge of the encasing portion parallel to the exterior wall material is 15 to 30 mm. A drip-proof member set for a flat roof of a wooden building, comprising the drip-proof member according to any one of claims 1 to 4 and a cover member for covering at least the enveloping portion. A drainage member set as described in claim 5 , characterized in that the apparent length extending downward from the front end of the top edge of the cover member parallel to the exterior wall material is 25±5 mm. A mounting structure for a drainage member as described in any one of claims 1 to 4 , characterized in that the space between the structural ventilation hardware and the upper end of the exterior wall material is sealed, the upper end of the vertical furring strip and the upper surface of the structural ventilation hardware are installed horizontally, the drainage member is positioned so that the structural ventilation hardware fits into the enveloping portion, and the base portion is fixed with screws. 8. The mounting structure for a drainage member according to claim 7 , further comprising a cover member for covering at least the joint portion of the drainage member.

Images