JP7291939B2 - ventilation material - Google Patents

Description

Article 30, Paragraph 2 of the Patent Act is applied Published in the 2018-2019 catalog of Howzeco Co., Ltd.

The present invention relates to a ventilation material, and more particularly to a ventilation material used for natural ventilation of a house.

As a ventilation material used for natural ventilation of a house, there is one shown in Patent Document 1.

FIG. 12 is a schematic end view showing a state of attachment to the eaves portion of a conventional eaves ventilation structure.

Referring to FIG. 12, the eaves ventilation structure 100 is composed of an eaves member 101 formed by pressing a long steel plate, and a ventilation member 102 mounted inside the eaves member 101. .

The eaves edge member 101 includes a first vertical portion 103 extending downward, a bottom portion 104 extending obliquely upward from the lower end of the first vertical portion 103 toward the outer surface of the fascia 110, and an upper end of the bottom portion 104. and a brim portion 105 extending so as to come into contact with the outer surface of the fascia 110 . A plurality of openings 106 are formed by cutting and raising at predetermined intervals in the longitudinal direction in the portion of the first vertical portion 103 below the surface on which the ventilation member 102 is attached. A sealing member 107 made of rubber foam or the like and formed in a bar shape extending in the longitudinal direction and having a rectangular cross section in the width direction is attached to the upper surface of the flange portion 105 by adhesion or the like.

The ventilation member 102 is made by laminating a plurality of synthetic resin sheets each having an uneven cross-sectional shape and integrating them by heat-sealing. It has a rod shape having substantially the same length as the length of the eaves edge member 101 in the longitudinal direction, and is formed with a large number of vent holes 108 penetrating from the lower surface to the upper surface.

In such an eaves ventilation structure 100, in a ventilated state, outside air entering from each of the openings 106 passes upward through the ventilation holes 108 of the ventilation member 102, and passes upward of the fascia 110. Go through and move to the back of the hut.

Also, the rainwater that has entered through each of the openings 106 cannot move upward through the ventilation holes 108 of the ventilation member 102, but is released through the drain holes 109 formed in the bottom surface portion 104. discharged in the direction of That is, the ventilation member 102 exhibits a ventilation function and a waterproof function.

Furthermore, in the event of a fire, even if the sealing member 107 is melted by heat and the bonding state between the eaves member 101 and the fascia 110 cannot be maintained, the gap between the eaves member 101 and the fascia 110 is covered by the flange portion 105. Since outside air is less likely to inadvertently enter the attic, the spread of fire damage can be suppressed.

JP 2013-60746 A

In the above-described eaves ventilation structure shown in Patent Document 1, in the event of a fire, the brim prevents outside air from entering along the fascia, but cannot prevent outside air from entering through the openings and vents. Outside air entered into the attic.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a ventilating material exhibiting superior ventilation function, waterproof function and fireproof function.

In order to achieve the above object, the invention according to claim 1 is a ventilation material used for natural ventilation of a house, which is formed by bending a long metal plate, and includes a first hanging part, a ventilation part extending obliquely upward from a lower end of the first hanging part toward a direction away from the inner surface on the side of the inner surface of the first hanging part and having a plurality of ventilation holes formed therein; and an upper end of the ventilation part. and a horizontal portion extending horizontally in a direction away from the inner surface; a waterproof member having a ventilation function and a waterproof function, which is placed on the upper surface of the horizontal part so that one surface faces the inner surface, and a waterproof member arranged on the inner surface; and a first thermal expansion material.

With this configuration, the first thermal expansion material expands in the event of a fire, blocking the ventilation path.

According to the invention of claim 2, in the structure of the invention of claim 1, an aluminum tape is attached via an adhesive from the entire surface of the first thermal expansion material on the waterproof member side to a part of the inner surface. is.

With this structure, the air vent is covered with the aluminum tape, which is peeled off by the heat and dropped in the event of a fire.

The invention according to claim 3 is the structure of the invention according to claim 1 or claim 2, wherein the waterproof member is composed of two sets of waterproof units each formed by combining two U-shaped members, and The U-shaped member is formed by bending an elongated metal plate into a substantially U-shaped cross-sectional shape in the transverse direction to form a vertical surface portion, an upper surface portion, and a lower surface portion, and the vertical surface portion has a cross-sectional shape in the transverse direction. A plurality of cut-and-raised holes rising on the open side of the waterproof unit are formed at predetermined intervals in the longitudinal direction. It has a substantially rectangular cross-sectional shape in the transverse direction, in which the parts and the lower surface parts are overlapped and combined, and when placed on the horizontal part, two sets of waterproof units The vertical surface portions on one side are in contact with each other and the positions of the cut-and-raised holes are aligned with each other, and one of the other vertical surface portions faces the inner surface.

With this configuration, the number of places where water is blocked increases.

The invention according to claim 4 is the structure according to any one of claims 1 to 3, wherein a second hanging part hanging from an end part of the horizontal part on the side away from the inner surface is formed, and the second hanging part is formed. A second thermal expansion material is arranged on the surface of the hanging part on the ventilation part side.

With this configuration, the second thermal expansion material expands in the event of a fire to block the space between the outer wall and the ventilation material and the ventilation holes.

As described above, in the invention according to claim 1, the first thermal expansion material expands in the event of a fire and closes the ventilation path. .

In addition to the effect of the invention of claim 1, the invention of claim 2 covers the ventilation hole with the aluminum tape that the adhesive peels off and falls due to heat during a fire. It becomes difficult to drip down.

According to the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, the number of places where water is blocked increases, so the waterproof function is improved.

In the invention according to claim 4, in addition to the effect of the invention according to any one of claims 1 to 3, the second thermal expansion material expands in the event of a fire, and the space between the outer wall and the ventilation material Since the ventilation holes are blocked, the fire prevention function is improved.

1 is a perspective view showing the external shape of a ventilation member according to a first embodiment of the invention; FIG. FIG. 2 is a front view of the frame shown in FIG. 1; FIG. 2 is a rear view of the frame shown in FIG. 1; 4 is a cross-sectional view taken along line IV-IV shown in FIG. 3; FIG. FIG. 2 is a front view of the first U-shaped member shown in FIG. 1; FIG. 6 is an end view of the VI-VI line shown in FIG. 5; 1. It is a schematic diagram which shows the assembly process of the waterproof member shown in FIG. FIG. 2 is a schematic right side view showing a state where the ventilation material shown in FIG. 1 is attached to the eaves edge portion; 1. It is a schematic diagram which shows each movement at the time of a fire of the closure tape shown in FIG. 1, a 1st thermal expansion material, a 2nd thermal expansion material, and a thermal expansion material. FIG. 2 is a schematic right side view showing the state of attachment of the ventilation member shown in FIG. 1 to the verge portion; FIG. 2 is a schematic right side view showing the state of attachment of the ventilation material shown in FIG. It is a schematic end elevation which shows the attachment state to the eaves edge part of the conventional eaves ventilation structure.

FIG. 1 is a perspective view showing the appearance of a ventilation member according to a first embodiment of the invention, FIG. 2 is a front view of the frame shown in FIG. 1, and FIG. 4 is a cross-sectional view of the IV-IV line shown in FIG. 3, and FIG. 5 is a front view of the first U-shaped member shown in FIG. 6 is an end view of the VI-VI line shown in FIG. 5, FIG. 7 is a schematic diagram showing the assembly process of the waterproof member shown in FIG. 1, and FIG. 8 is shown in FIG. FIG. 9 is a schematic right side view showing the attachment state of the ventilation material to the eaves part, FIG. It is a schematic diagram which shows the movement of time.

First, referring to FIG. 1, the ventilation member 1 includes a frame 10, a waterproof member 20 placed inside the frame 10, and a first thermal expansion member 70 placed inside the frame 10. consists of

Next, referring to FIGS. 2, 3 and 4, the frame 10 is formed by bending a long steel plate, and includes a first drooping portion 11 and a lower end portion of the first drooping portion 11. a ventilation portion 14 extending obliquely upward in a direction away from the inner surface 12 of the first hanging portion 11 on the side of the inner surface 12 of the first hanging portion 11 and having a plurality of rectangular ventilation holes 13 formed at intervals of 7 mm in the longitudinal direction; , a horizontal portion 15 extending horizontally away from the inner surface 12 from the upper end of the ventilation portion 14, and a second hanging portion 16 hanging down from the end of the horizontal portion 15 on the side away from the inner surface 12. Prepare. The effects of this configuration will be described later. The dimensions are such that the height of the first hanging portion 11 is 70 mm, the horizontal distance between the first hanging portion 11 and the upper end of the ventilation portion 14 is 12 mm, and the horizontal length of the horizontal portion 15 is 70 mm. 30 mm, the height of the second hanging portion 16 is set to 10 mm, and each of the air holes 13 is set to 14 mm×5 mm.

Next, referring to FIG. 1 again, the waterproof member 20 includes a first waterproof unit 21 composed of a first U-shaped member 30 and a second U-shaped member 40, and a third U-shaped member 50. and a second waterproof unit 22 comprising a fourth U-shaped member 60 . The effects of this configuration will be described later.

Next, referring to FIGS. 5 and 6, the first U-shaped member 30 is formed by bending a long metal plate into a substantially U-shaped cross-sectional shape in the lateral direction to form a vertical surface portion 31 and an upper surface portion. 32, a lower surface portion 33 is formed, and a plurality of cut-and-raised holes 35 are formed at predetermined intervals in the longitudinal direction in the vertical surface portion 31 so as to rise on the open side 34 in the lateral cross-sectional shape. The height of the vertical surface portion 31 is set to 21 mm.

1 again, each of the second U-shaped member 40, the third U-shaped member 50 and the fourth U-shaped member 60 is the same as the first U-shaped member 30. , the description is omitted here. The effects of this configuration will be described later.

In assembling the waterproof member 20, first, referring to (1) of FIG. The first U-shaped member 30 and the second U-shaped member 40 are moved in the direction of the arrows in the figure, and as shown in (2) of FIG. and the lower surface portion 43 are respectively overlapped and combined so as to form a substantially rectangular cross-sectional shape in the transverse direction to constitute the first waterproof unit 21 .

With this configuration, the cut-and-raised holes 35 and 45 are arranged at positions separated by a predetermined distance, so that the ventilation path is less likely to be clogged and the waterproof function is improved.

Finally, referring to (3) of FIG. 7, the second waterproof unit 22 is assembled by the third U-shaped member 50 and the fourth U-shaped member 60 in the assembly process of the first waterproof unit 21. It is configured through the same assembly process as After that, the first waterproof unit 21 and the second waterproof unit 22 are arranged side by side in a state in which the vertical surface portions 41 and 51 are in contact with each other and the cut-and-raised holes 45 and 55 are formed in the same positions. Thus, the assembly of the waterproof member 20 is completed.

With this configuration, the cut-and-raised holes 55 and 65 are arranged in addition to the cut-and-raised holes 35 and 45 which are arranged at positions apart from each other by a certain distance, so that the number of arrangement locations is further increased, thereby further improving the waterproof function.

Next, referring to FIG. 1 again, a cut-and-raised hole 35 is formed in the vertical surface portion 31 corresponding to one surface of the waterproof member 20, and a cut-and-raised hole 65 is formed in the vertical surface portion 61 corresponding to the other surface of the waterproof member 20 facing the vertical surface portion 31. , the formed waterproof member 20 is placed on the upper surface of the horizontal portion 15 so that the vertical surface portion 31 faces the inner surface 12 of the frame 10 .

With this configuration, the number of places where water is blocked increases, so the waterproof function is improved.

Next, referring to FIGS. 1 and 8, the elongated first thermal expansion material 70 is applied to the inner surface 12 of the frame body 10 in which the ventilation holes 13 are formed. A long closure tape 71 is attached to the entire surface of the first thermal expansion material 70 on the waterproof member 20 side and part of the inner surface 12 . The closure tape 71 includes a sheet body 72 having a length in the transverse direction of 25 mm and an adhesive 74 applied to one surface 73 of the sheet body 72. The closure tape 71 has a height of 10 mm, which is the position described above via the adhesive 74. and a part of the inner surface 12 below the location where the first thermal expansion material 70 is arranged. It should be noted that the sticking position of the blocking tape 71 is a position where the peeled sheet body 72 can block the ventilation hole 13 at the falling destination. Moreover, the sheet body 72 has a size capable of covering the entire vent hole 13 . The effects of this configuration will be described later. Furthermore, the sheet body 72 is made of aluminum, which is a nonflammable material. With this configuration, the closure tape 71 can be easily produced, and is lightweight and easy to handle, which is advantageous in terms of cost.

The second thermal expansion material 80 is arranged on the surface of the second hanging portion 16 on the ventilation portion 14 side. The effects of this configuration will be described later.

From the upper end of the first hanging portion 11, an L-shaped portion 86 is formed that extends 12 mm in the horizontal direction away from the inner surface 12, bends and hangs further by 10 mm. An elongated silica plate 87 is inserted between the 1 drooping portion 11 and the L-shaped portion 86 as a heat insulating material that has high fire resistance and is difficult to conduct heat. A long thermal expansion material 88 a is provided on the upper surface of the L-shaped portion 86 , a long thermal expansion material 88 b is provided on the upper surface of the waterproof member 20 , and a long thermal expansion material 88 b is provided on the upper surface of the lower surface portion 43 of the first waterproof unit 21 . An elongated thermal expansion member 88c is arranged on the lower surface portion 63 of the second waterproof unit 22, and an elongated thermal expansion member 88d is arranged on the upper surface of the lower surface portion 63 of the second waterproof unit 22, respectively. One-dot chain lines in FIG. 1 indicate the positions of the screws that fix the waterproof member 20 together with the thermal expansion members 88c and 88d. Each of the first thermal expansion member 70, the second thermal expansion member 80, and the thermal expansion members 88a to 88d has the property of once gelling when the temperature exceeds 150.degree. C. and foaming and expanding at 180.degree. Further, a watertight material 89a is arranged to cover the upper surface of the thermal expansion material 88a and the side surface on the side of the first hanging portion 11, and a watertight material 89b is arranged on the upper surface of the thermal expansion material 88b. The watertight materials 89a and 89b are made of ethylene propylene diene rubber. The effects of this configuration will also be described later.

Next, referring to FIG. 8, when attaching the ventilation material 1 to the eaves portion, the upper end of the outer wall 91 and the outer side end of the rafters 92 are brought into contact with the second hanging portion 16, and the first hanging portion is attached. A nail 94 is driven through the base wood 93 through the portion 11 and the calcium hydroxide plate 87, and the roof 95 is placed above the watertight material 89a so as to close the contact portion between the first drooping portion 11 and the lower surface of the roof 95. A sealing 96a is applied to the upper end of the outer wall 91 and a sealing 96b is applied so as to close the space provided between the upper end of the outer wall 91 and the horizontal portion 15 together with the second thermal expansion member 80, respectively.

Next, referring to FIG. 9 (1), as indicated by the arrows in the figure, outside air normally flows indoors from the ventilation holes 13 of the ventilation member 1 via the inside of the ventilation member 1 and the waterproof member 20. To go. In addition, the rainwater entering with the outside air is blocked from entering the room by each of the cut-and-raised holes 35 , 45 , 55 , and 65 when passing through the waterproof member 20 . Thus, the ventilation material 1 normally has a ventilation function and a waterproof function.

Next, referring to FIG. 9(2), a fire breaks out and the ambient temperature of the ventilator 1 gradually rises to nearly 150.degree. The adhesive 74 shown in FIG. 8 has a property of weakening its adhesive force at a temperature lower than 150° C., which is the temperature at which the first thermal expansion material 70 gels. Then, since the closing tape 71 is attached to the surface of the first thermal expansion material 70, the temperature changes occurring in the closing tape 71 and the first thermal expansion material 70 are almost the same, so the first thermal expansion material 70 is gelled. Before that, the sheet body 72 of the blocking tape 71 is peeled off and falls as indicated by the arrow in the figure, blocking the ventilation hole 13 . With this configuration, the sheet body 72 of the closure tape 71 is easily peeled off before the first thermal expansion material 70 gels as the temperature rises. The first thermal expansion material 70 that has been softened is less likely to drip down from the ventilation hole 13 . Incidentally, even if the first thermal expansion material 70 gels before the sheet body 72 is peeled off, the sheet body 72 stops the flow of the first thermal expansion material 70, so the first thermal expansion material 70 is prevented from flowing through the ventilation holes 13. In any case, the first thermal expansion material 70 is less likely to drip from the ventilation holes 13.例文帳に追加

In addition, the sealings 96a and 96b disappear as the temperature rises, and the second thermal expansion material 80 is exposed.

Finally, referring to (3) of FIG. 9, the ambient temperature of the ventilator 1 further rises due to the fire, reaching 180° C. or higher. Then, each of the first thermal expansion member 70 and the thermal expansion members 88a, 88b, 88c and 88d foams and expands to block the inside and outside of the ventilation member 1, that is, the ventilation path. Thus, the ventilation material 1 exhibits a fire prevention function in case of fire. The second thermal expansion material 80 also foams and expands to block the space between the upper end of the outer wall 91 and the ventilation member 1 and the ventilation hole 13 . Then, as indicated by the arrows in the figure, outside air is blocked outside the ventilator 1, making it difficult for it to enter the room.

FIG. 10 is a schematic right side view showing how the ventilation material shown in FIG. 1 is attached to the verge.

Referring to the figure, when attaching the ventilation material 1 to the verge, the second drooping part 16 is brought into contact with the upper end of the outer wall 91 , and the first drooping part 11 and the calcium silicate board 87 are penetrated and the base wood 93 is nailed. A roof 95 is placed above the watertight material 89a, and a sealing 96a is attached between the upper surface of the outer wall 91 and the horizontal portion 15 so as to block the contact portion between the first hanging portion 11 and the lower surface of the roof 95. A sealing 96b is applied and attached so as to close the space of the second thermal expansion material 80 together. When installed in this way, the ventilation material 1 exhibits the same ventilation function, waterproof function, and fireproof function even in the verge as when it is attached to the edge of the eaves.

FIG. 11 is a schematic right side view showing how the ventilation material shown in FIG. 1 is attached to the underside of the top rail.

Referring to the figure, when attaching the ventilation material 1a to the lower part of the coping, the second drooping part 16 is brought into contact with the upper end of the outer wall 91 on one side of the beam 97, and the first drooping part 11 and the calcium silicate board are attached. A nail 94 is driven through the base wood 93 through the hole 87 , and a sealing 96 is applied to cover the second thermal expansion member 80 in the space between the upper end of the outer wall 91 and the horizontal portion 15 . The attachment of the ventilating material 1b to the lower part of the top rail is the same as that of the ventilating material 1a on the other side facing the one side of the beam 97, so the description is omitted here. After installing the ventilation materials 1a and 1b, an aluminum top rail 98 is placed so as to cover the upper surfaces of the ventilation materials 1a and 1b and the beams 97. As shown in FIG. When installed in this manner, the ventilating materials 1a and 1b exhibit the same ventilation, waterproof and fireproof functions even under the coping as when attached to the edge of the eaves.

In addition, in the above-described first embodiment, the frame is provided with the second hanging portion, but it may not be provided.

Moreover, although the second thermal expansion member is arranged in the above-described first embodiment, it may be omitted.

Furthermore, in the first embodiment described above, a plurality of thermal expansion members are arranged, but at least the first thermal expansion member should be provided.

Furthermore, in the above-described first embodiment, the waterproof member is composed of the specific member, but it is elongated and has a substantially rectangular cross-sectional shape in the transverse direction, and faces one surface and one surface. A plurality of holes are formed in each of the other surfaces, and the one surface is placed on the upper surface of the horizontal part so as to face the inner surface of the frame.

Furthermore, in the above-described first embodiment, the closing tape provided with the sheet body made of aluminum is attached, but it may be omitted.

Furthermore, although the sheet body is made of aluminum in the first embodiment, it may be made of other nonflammable materials.

Furthermore, in the above-described first embodiment, the blocking tape was attached at a specific position, but if the peeled sheet body is at a position where the ventilation holes can be blocked, other parts inside the ventilation material can be attached. It may be attached to a member other than the ventilation material.

Furthermore, in the above-described first embodiment, the sheet body has a size capable of covering the entire vent hole, but has a size capable of covering at least a part of the vent hole. It's fine if you do.

Furthermore, in the first embodiment, the frame is made of steel plate, but it may be made of other metal plates.

Furthermore, in the above-described first embodiment, each of the frame, waterproof member, first thermal expansion member, and closure tape is formed with predetermined dimensions, but may be formed with other dimensions.

Furthermore, in the above-described first embodiment, the ventilation material includes the watertight material and the silica plate, but they may be omitted.

Furthermore, in the above-described first embodiment, each of the first thermal expansion material, the second thermal expansion material, the thermal expansion material, and the adhesive changes its state when it exceeds a specific temperature. As long as the peeling temperature is lower than the temperature at which the first thermal expansion material becomes gel, the same state change may occur at other temperatures.

Furthermore, in the above-described first embodiment, the ventilating material is attached to the eaves, the verge, and the underside of the coping, but it may be attached to other ventilating places in the house.

From the above embodiments, the following inventions can be protected.

The invention according to a first aspect is a ventilation structure used for natural ventilation of a house, comprising a main body having a ventilation hole formed thereon, and a thermal expansion material disposed above the ventilation hole inside the main body. and a closing tape disposed inside the main body, the closing tape being applied to one side of the sheet body made of a noncombustible material and having a temperature lower than the temperature at which the thermal expansion material gels. An adhesive whose adhesive strength weakens with temperature is provided, and the adhesive is adhered to the inside of the main body at a position where the sheet body can block the air vent at the point where it peels off. .

With this configuration, the blocking tape is peeled off before the thermally expansive material is gelled to block the ventilation holes, so that the gelled thermally expansive material is less likely to drip from the ventilation holes.

According to a second aspect of the invention, in the configuration of the first aspect of the invention, the nonflammable material is aluminum.

With this configuration, the closure tape can be easily produced, and it is lightweight and easy to handle, which is advantageous in terms of cost.

According to a third aspect of the invention, in the configuration of the first aspect or the second aspect, the closing tape is attached to the surface of the thermal expansion material.

With this configuration, the sheet body tends to peel off before the thermal expansion material gels as the temperature rises. Further, when the thermally expansive material gels before the sheet body is peeled off, the sheet body stops the flow of the thermally expansible material, so that the thermally expansive material is more difficult to drip from the ventilation holes.

The above-described eaves ventilation structure disclosed in Patent Document 1 cannot prevent outside air from entering through the opening during a fire, and the outside air enters the attic.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, and to provide a ventilation structure that exhibits a more excellent fireproof function.

DESCRIPTION OF SYMBOLS 1... Ventilation material 10... Frame body 11... 1st hanging part 12... Inner surface 13... Ventilation hole 14... Ventilation part 15... Horizontal part 16... 2nd hanging part 20... Waterproof member 21... First waterproof unit 22... Second Waterproof unit 30 First U-shaped member 31 Vertical surface portion 32 Upper surface portion 33 Lower surface portion 34 Release side 35 Cut-and-raised hole 40 Second U-shaped member 41 Vertical surface portion 42 Upper surface portion 43 Lower surface portion 44 Open side 45 Cut-and-raised hole 50 Third U-shaped member 51 Vertical surface portion 55 Cut-and-raised hole 60 Fourth U-shaped member 61 Vertical surface portion 63 Lower surface portion 65 Cut Raised hole 70 First thermal expansion material 71 Closing tape 74 Adhesive 80 Second thermal expansion material In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (4)

A ventilation material used for natural ventilation of a house,
It consists of a long metal plate that is bent and shaped, and extends from the first hanging portion and the lower end of the first hanging portion toward the inner surface side of the first hanging portion in the direction away from the inner surface. a frame body comprising: a ventilation portion extending obliquely upward through the base and formed with a plurality of ventilation holes; and a horizontal portion extending horizontally from an upper end portion of the ventilation portion in a direction away from the inner surface;
It is elongated and has a substantially rectangular cross-sectional shape in the transverse direction, and a plurality of holes are formed in each of one surface and the other surface facing the one surface, and the one surface faces the inner surface. a waterproof member having a ventilation function and a waterproof function, which is placed on the upper surface of the horizontal part so as to
and a first thermally expansible material disposed on the inner surface. 2. The ventilation material according to claim 1, wherein an aluminum tape is pasted via an adhesive from the entire surface of the first thermal expansion member on the waterproof member side to a part of the inner surface. The waterproof member is composed of two sets of waterproof units each composed of a combination of two U-shaped members,
The U-shaped member has a vertical surface portion, an upper surface portion, and a lower surface portion formed by bending an elongated metal plate into a substantially U-shaped cross-sectional shape in the transverse direction, and A plurality of cut-and-raised holes rising on the release side in the cross-sectional shape are formed at predetermined intervals in the longitudinal direction,
The waterproof unit has a lateral cross-sectional shape obtained by combining two U-shaped members with the open sides facing each other and the upper surface portions and the lower surface portions overlapping each other. It consists of those having a substantially rectangular shape as
When the two sets of waterproof units are placed on the horizontal portion, the two sets of waterproof units are arranged in a state in which the vertical surface portions of each pair are in contact with each other and the positions of the cut-and-raised holes are aligned with each other. 3. The ventilating material according to claim 1, wherein the other one of said vertical surface portions faces said inner surface. 2. A second hanging portion hanging from an end of said horizontal portion away from said inner surface is formed, and a second thermal expansion material is disposed on a surface of said second hanging portion facing said ventilation portion. The ventilation material according to any one of claims 1 to 3.

Images