JP2012036648A - Ventilation ridge and ventilation ridge for descending ridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ventilation ridge which is simple in structure, easy to construct and inexpensive.SOLUTION: A prescribed opening is constructed between two roof boards. A ventilation metal sheet ridge is placed over the opening. The ventilation metal sheet ridge comprises a metal sheet ridge and a ridge ventilation member. The ridge ventilation member is arranged between the metal sheet ridge and the roof boards. The ridge ventilation member includes: first ventilation members which are placed along the roof boards and have end surfaces between the metal sheet ridge and the roof boards to allow air to pass therethrough; second ventilation members rising from the first ventilation members; and third ventilation members which are placed along an upper section of the metal sheet ridge and communicate with the second ventilation members at one end and with the opening at the other end.

Description

  The present invention relates to a ventilation building and a down-building ventilation building in which an opening is provided between field plates and the inside of the building is ventilated through the opening.

  Ventilation buildings that allow ventilation inside the building through the roof ridge are known. As a ventilation building, for example, there is a structure in which left and right field plates are abutted with a predetermined opening, a roof tile is mounted on the opening of the field plate, and a lower portion of the roof tile is opened.

  Furthermore, as a ventilation building, various structures are known so that rainwater does not enter the building through an opening provided between the field plates. As an example, a structure in which a breathable water shielding plate (hereinafter referred to as “water shielding plate”) is provided between a crown tile and a purlin is known. This water shielding plate is made of a light metal thin plate such as an aluminum plate, and is installed between the purlin and the roof tile, ensuring ventilation in the building and setting the ventilation holes appropriately. It is a member that prevents rainwater from entering. In recent years, it is desirable to provide a structure that can be ventilated in the descending wing.

JP 2008-208618 A

  However, the construction of the ventilation structure in the building takes time for construction and increases the number of parts, which increases the cost. In addition, it is necessary to configure so that rainwater does not enter the building even during strong winds.

  In addition, in the descending building, the opening of the field plate is inclined along the descending building, so the ventilation building reliably blocks rainwater flowing down the descending building, and rainwater enters the building through the opening. I needed a structure to prevent it.

  An object of the present invention is to solve the above problems, and to provide a ventilation building that is easy to construct, has a small number of parts, and is low in cost.

In order to solve the above problems, in the present invention, the ventilation wing and the down wing ventilation wing are respectively configured as follows.
A predetermined opening leading to the back of the hut is provided at the abutting portion of the two field boards, and a ventilation sheet metal ridge is attached on the opening. Around the opening, a draining member that is raised from the periphery of the opening and whose upper end is connected to the ventilation sheet metal building is attached.

  The ventilation sheet metal building is composed of a sheet metal building and a building ventilation member. The sheet metal building includes, for example, a main inclined part that bends the sheet metal and tilts left and right from the top part, a vertical wall part provided at an end of each main inclined part, and a sub-inclined part that extends outward from the vertical wall part, respectively. Formed from.

  The ridge ventilation member is formed from, for example, a commercially available resin plate material. The resin plate member has a structure in which a holding member is provided between two synthetic resin plate members, and the two synthetic resin plate members are held at a predetermined interval by the holding member. In addition, the holding member is provided at an appropriate interval between the two sheets of synthetic resin, and allows ventilation between the sheets. The structure of the resin plate material is not particularly limited.

  The building ventilation member is provided on the back side of the sheet metal building. Moreover, the ridge ventilation member is formed of a first ventilation member, a second ventilation member, and a third ventilation member corresponding to each part of the sheet metal ridge. The first ventilation member corresponds to the sub-inclined portion, the second ventilation member corresponds to the vertical wall portion, and the third ventilation member is provided to correspond to the main inclined portion.

  The first ventilation member is provided on the lower surface of the sub-inclined portion, with one end surface positioned at the outer end of the sub-inclined portion and the other end surface positioned near the inner end of the sub-inclined portion. The second ventilation member is provided along the inside of the vertical wall portion. One end surface of the second ventilation member is opposed to the other end surface of the first ventilation member, and the other end surface is provided on an upper portion of the vertical wall portion. The third ventilation member is provided along the main inclined portion of the ventilation sheet metal ridge, with one end face opposed to the other end face of the second ventilation member and the other end face positioned above the opening formed in the base plate. is there. A draining member is provided around the opening. The lower part of the draining member is attached around the opening, and the upper part is provided inside the other end surface of the third ventilation member.

  In the descending building, the ventilation sheet metal building having the above-described configuration is attached to the upper part of the opening formed in the descending building, and a draining member is provided around the opening. The draining member is provided along at least the descending ridge and closes the space between the field board and the ventilation member in a watertight manner. Further, the draining member has a shape in which the upper edge of the slope is pointed upward.

  Further, in the down wing, a down ridge ventilation member may be provided directly at the opening portion formed in the base plate instead of the ventilation sheet metal wing. The descending building ventilation member has a waterproof structure on the upper surface, and the periphery of the descending building ventilation member and the opening surface of the lower surface communicate with each other. The opening surface of the lower surface is provided corresponding to the opening portion of the field plate. A roof member is provided on the downhill ventilation member. Furthermore, a draining member is provided at least at the upper edge of the downhill ventilation member. This draining member has a shape pointed upward, and has a structure in which water flowing down from above is allowed to flow obliquely downward.

  The ventilation building and the downhole ventilation building according to the present invention have the following effects, respectively.

  The opening formed in the field plate is covered with a ventilation sheet metal wing, and rainwater and the like do not enter directly. When the room air is discharged from the opening between the field plates, the air enters the third ventilation member from the end surface of the third ventilation member, passes through the second ventilation member, and is discharged from the end surface of the first ventilation member to the atmosphere. To be released. Also, following the reverse path, outside air enters the inside of the ventilation building and enters the back of the hut through the opening. Thereby, the building is ventilated through the ventilation sheet metal building.

  On the other hand, even if rainwater passes through the first ventilation member due to cross wind or the like, the rainwater does not easily pass through the second ventilation member because the second ventilation member rises. Even if rainwater passes through the second ventilation member and reaches the third ventilation member, the rainwater hardly passes through the third ventilation member and falls from the upper opening end of the third ventilation member. There is no entry into the building. Therefore, in the ventilation building using the ventilation sheet metal building, the ventilation is sufficiently performed, and the intrusion of rainwater and the like can be reliably blocked.

  Since the ventilation sheet metal wing only has to assemble the ridge ventilation member to the conventional sheet metal wing, the cost and labor can be greatly reduced. The first to third ventilation members can be formed, for example, by cutting and bending a commercially available resin plate material, and can be easily and inexpensively formed. Moreover, by forming a plurality of cuts, and selecting and bending the cuts according to the situation, it is possible to cope with various sheet metal wings having different shapes.

  Further, since the space between the base plate and the ventilation member is watertightly closed in the downhill ventilation member, water does not enter from the opening even if a step is formed on the roof member. Moreover, since the drainage member is provided in the upper part of an opening part, the drainage member interrupts the water which flows down along a downward ridge, and rainwater etc. do not permeate into an opening part. Moreover, since the opening surface and the end surface of the lower surface communicate with each other, ventilation can be performed sufficiently in the descending building.

It is sectional drawing which shows one Embodiment of the ventilation building concerning this invention. It is a disassembled sectional view of the ventilation building shown in FIG. It is a perspective sectional view of the ventilation building shown in FIG. It is a disassembled perspective view of the ventilation building shown in FIG. It is sectional drawing which shows a ridge ventilation member. It is sectional drawing which shows the other example of a ventilation sheet metal building. It is sectional drawing which shows the other example of a ventilation building. It is sectional drawing which shows the other example of a ventilation building. It is a perspective view which shows a draining board. It is a perspective view which shows a down wing. It is a perspective view which shows the other example of a ridge ventilation member. It is sectional drawing which shows the other example of the ventilation ridge for down wings. It is a perspective view which shows a draining board.

An embodiment of a ventilation building according to the present invention will be described.
FIG. 1 shows a ventilation building 10. The ventilation building 10 includes a ventilation sheet metal building 12, a rootstock 16, a draining plate 18 serving as a draining member, a field plate 20, a roof member 22, and the like.

  The two field boards 20 are supported by purlins (not shown) and are faced at a predetermined angle above. An opening 24 having a predetermined width is formed at the butt portion of the base plate 20. The opening 24 communicates with the back of the building (not shown).

  As shown in FIG. 2, the ventilation sheet metal building 12 includes a sheet metal building 26 and a building ventilation member 28. The sheet metal building 26 is a metal elongated member, and is formed by press working or the like. As shown in FIGS. 3 and 4, the sheet metal building 26 includes a top portion 30, a main inclined plate 32 as a main inclined portion, a vertical wall 34 as a vertical wall portion, a sub inclined plate 36 as a sub inclined portion, and the like. It is composed of The main inclined plate 32 is equally inclined from the top 30 to the left and right.

  The main inclined plate 32 is bent downward at the lower end and connected to the vertical wall 34. The vertical wall 34 has a predetermined length, is bent outward at the lower end, and is connected to the sub-inclined plate 36. The sub-inclined plate 36 extends outward from the vertical wall 34 by a predetermined length. The sheet metal building 26 is usually used by combining a plurality of sheet metal buildings 26 in the longitudinal direction. The sheet metal building 26 can be a commercially available sheet metal building. The sheet metal building 26 does not have to be made of metal.

  The building ventilation member 28 is formed of a resin plate. As shown in FIG. 5, the wing ventilation member 28 is formed of two waterproof thin plates 40 arranged in parallel and a plurality of holding members 42 provided between the two waterproof thin plates 40. The waterproof thin plate 40 is made of, for example, a synthetic resin material and has a predetermined thickness. The holding member 42 is formed by combining, for example, frustoconical protrusions, and is fixed to the waterproof thin plate 40 by heat welding, adhesion, or the like.

  The holding member 42 supports the load applied in the thickness direction to the ridge ventilation member 28, and the holding member 42 is formed with a predetermined gap, so that the space between the two waterproof thin plates 40 can be ventilated. I have to. The ridge ventilation member 28 has air permeability that allows any end surface to communicate with the inside, but does not have air permeability in the front-back direction. The building ventilation member 28 is formed in accordance with the shape of the sheet metal building 26 as shown in FIGS. The waterproof thin plate 40 may be one instead of two, and one may use the inner surface of the sheet metal building 26.

  Next, the building ventilation member 28 will be specifically described. The building ventilation member 28 is divided into a first ventilation member 50, a second ventilation member 52, and a third ventilation member 54. The first ventilation member 50 is formed so as to correspond to the sub-inclined plate 36. When the ventilation sheet metal building 12 is attached to the building, the first ventilation member 50 is located between the sub-inclined plate 36 and the roof member 22, and one end surface thereof is the sub-inclined plate 36. And between the roof member 22 and the outside of the sheet metal building 26. The other end of the first ventilation member 50 is located at a bent portion of the vertical wall 34 and the auxiliary inclined plate 36.

  The second ventilation member 52 is provided corresponding to the vertical wall 34. One end surface of the second ventilation member 52 is opposed to the other end surface of the first ventilation member 50 at the lower portion of the vertical wall 34, and the other end surface is opposed to one end surface of the third ventilation member 54 at the upper portion of the vertical wall 34. ing.

  The third ventilation member 54 is provided corresponding to the main inclined plate 32. One end surface of the third ventilation member 54 is opposed to the other end surface of the second ventilation member 52 at the lower part of the main inclined plate 32, and the other end surface of the third ventilation member 54 is located above the opening 24. . The first ventilation member 50, the second ventilation member 52, and the third ventilation member 54 are continuously formed by making a cut in a resin plate and bending the waterproof thin plate 40 as shown in FIG. Has been. A pair of building ventilation members 28 are provided symmetrically.

  Next, a method for forming the ridge ventilation member 28 will be described. First, a resin plate made of the same material as the ridge ventilation member 28 is prepared. The resin plate material may be a commercially available one. The plate material is cut to have a length equivalent to the sheet metal ridge 26, for example, and the width is a value obtained by adding the widths of the first ventilation member 50, the second ventilation member 52, and the third ventilation member 54. Then, the waterproof thin plate 40 and the holding member 42 on the surface are cut with a cutter or the like along the side edge at a position having the same length as the width of the first ventilation member 50 from the side edge along the longitudinal direction. At that time, one waterproof thin plate 40 is left without being cut. A cutting line at this position is a first cutting line 60.

  Similarly, the second cutting line 62 is formed at a position having the same length as the width of the second ventilation member 52 from the first cutting line 60. The second cutting line 62 is formed from the opposite side of the first cutting line 60. When the plate material is bent at the first cutting line 60 and the second cutting line 62, the waterproof thin plate 40 that is not cut is bent, and the cut surface is opened at a desired angle with each cutting line as the center, as shown in FIG. . In addition, the other ridge ventilation member 28 is formed in a similar manner to the left and right. The method for forming the ridge ventilation member 28 is not limited to this method. You may form by bonding what was cut | disconnected separately.

  The drain plate 18 is made of, for example, a metal plate and is provided so as to surround the periphery of the opening 24. The lower end of the draining plate 18 is fixed by a nail or the like in a state of being erected on the field plate 20. The upper edge of the draining plate 18 is fixed to the lower surface of the building ventilation member 28.

  Next, the operation and effect of the ventilation building 10 will be described.

  Air in the building (referred to as “room air”) in the ventilation building 10 flows out onto the field board 20 through the opening 24 provided between the field boards 20 as indicated by the dotted arrows in FIG. . The room air that has flowed out onto the base plate 20 enters the inside of the third ventilation member 54 from one end of the third ventilation member 54, flows out of the opening at the other end through the inside.

  The room air flowing out from the other end (the lower end) of the third ventilation member 54 is bent along the vertical wall 34, passes through the inside of the second ventilation member 52, and passes through the second ventilation member 52. It flows out from the other end surface of 52.

  The room air flowing out from the other end surface of the second ventilation member 52 is bent by the roof member 22 and the sub-inclined plate 36 and flows into the first ventilation member 50 from one end surface of the first ventilation member 50. The room air that has flowed into the first ventilation member 50 flows out of the building from the other end surface of the first ventilation member 50, and the room air is released into the atmosphere from the back of the cabin. In addition, following the path opposite to the above path, outside air flows into the cabin.

  Further, the ventilation building 10 has a ventilation passage made up of the first ventilation member 50, the second ventilation member 52, and the third ventilation member 54, which are bent in order from the bottom to the top. Even if the wind blows strongly and the wind passes continuously through each passage, raindrops abut against the holding member 42 and the like on the way and do not reach the edge of the third ventilation member 54 and fall on the waterproof thin plate 40. . Then, it travels along the inner surface of the waterproof thin plate 40 and flows down onto the roof member 22 (tile, etc.) through the first ventilation member 50 and the like. Therefore, the ventilation building 10 allows the inside of the building such as the back of the shed and the outside air to circulate, but blocks the inflow of moisture such as raindrops into the building.

  Therefore, according to the ventilation building 10, the ventilation path is sufficiently formed, the ventilation function is reliably performed, the intrusion of rainwater can be prevented, and the waterproofing at the opening 24 can be reliably performed.

  FIG. 6 shows another example of the ventilation sheet metal building. This is an example in which the left and right ridge ventilation members 28 are formed from a single resin plate. First, a sheet material is formed in the entire length width when attached along the lower surface of the sheet metal ridge 26, and a first cutting line 60 and a second cutting line 62 are formed on the left and right ends, respectively. Further, the waterproof thin plate 40 at the lower surface of the center of the plate material and, if necessary, the holding member 42 are cut out to form an opening 64.

  The plate material thus formed is bent at the central portion 66 and bent at the first cutting line 60 and the second cutting line 62. Then, since the left and right sides of the ridge ventilation member 28 formed are continuous at the central portion 66, handling, attachment work, and the like are facilitated. Further, the opening 64 and the like are formed by cutting the central portion of the plate material, and the plate 64 is formed so that it can be bent. Therefore, it can be provided easily and inexpensively. In the excision at the central portion, the excision method and the shape of the end face are not particularly limited as long as the opening 64 to the inside of the wing ventilation member 28 can be formed and the bending process at the central portion 66 is possible.

  FIG. 7 shows another example of the ventilation building. This ventilation building 11 is configured by removing the second ventilation member 52 from the ventilation building 10. If comprised in this way, since a level | step difference is formed in the up-down direction between the 1st ventilation member 50 and the 3rd ventilation member 54, ventilation | gas_flowing is ensured, However, it becomes difficult for water to pass over a level | step difference. Waterproofness is ensured.

  FIG. 8 further shows another example of the ventilation building. The ventilation building 13 has a configuration in which the first ventilation member 50 is removed from the ventilation building 10. Even with this configuration, a bent passage is formed between the second ventilation member 52 and the third ventilation member 54, so that ventilation is ensured, but water hardly passes through the bending passage. And waterproofness is ensured.

  Next, an example of the ventilation building in the descending building will be described. FIG. 10 shows the descending building 70. The down wing 70 is a ridge that is inclined at a predetermined angle at a joint portion between the roof surface and the roof surface.

  An opening 24 is formed at the abutting portion of the base plate 20 of the descending wing 70. A draining plate 72 shown in FIG. 9 is attached to the outer peripheral portion of the opening 24. The draining plate 72 has a pair of left and right side walls 74 provided on the side of the opening 24, that is, along the descending ridge 70, an upper wall 76 provided at the upper part of the opening 24, and a lower wall 78 provided at the lower part. (Refer to FIG. 8).

  The side walls 74, the upper wall 76, and the lower wall 78 are provided with attachment pieces 73 and 71 extending outward from the upper and lower ends at both the upper and lower ends. The draining plate 72 surrounds the opening 24 by the pair of left and right side walls 74, the upper wall 76 and the lower wall 78.

  The lower end of the draining plate 72 is fixed on the base plate 20 by the mounting piece 71, and the upper end edge of the draining plate 72 is the sponge-like sealing member 85 (FIG. 13) attached to the mounting piece 73 and the mounting piece 73. (Refer to FIG. 4).

  In the descending wing 70, the roof member 22 is wound so that a part thereof overlaps the other roof member 22. Therefore, in the direction along the descending ridge 70, a place where the two roof members 22 are overlapped and a place where the three roof members 22 are overlapped appear alternately. Accordingly, when the rootstock 16 is attached along the opening 24 of the descending ridge 70, a gap is formed between the rootstock 16 and the roof member 22 at a location where the number of stacked roof members 22 is small.

  Even if the downhill ventilation building is provided in the rootstock 16, water may enter the inside of the ventilation sheet metal building 12 through the gap formed between the rootstock 16 and the roof member 22. However, since the draining plate 72 is attached to the periphery of the opening 24 from the base plate 20 to the lower surface of the third ventilation member 54, a gap is formed between the rootstock 16 and the roof member 22. However, the drain plate 72 blocks the passage of water and prevents rainwater or the like from entering the opening 24.

  As a result, ventilation and water shielding can be performed through the ventilation sheet metal building 12, and rainwater flows into the lower part of the roof member 22 in the descending building 70, and the water flows on the waterproof cloth attached to the field plate 20. However, the water is blocked by the drain plate 72 and does not enter the building through the opening 24.

  Furthermore, since the upper wall 76 is bent in a sharp shape upward, the water flowing down from the upper part is distributed to the left and right, and the inflow of water from the opening 24 can be effectively prevented.

  Next, another example of the ventilation building will be described.

  FIG. 12 shows the down wing 80. In this example, the down ridge ventilation member 82 and the draining plate 84 are provided below the roof tile 86. As described above, the opening 24 is formed in the descending ridge 80, and the descending ridge ventilation member 82 is attached so as to close the opening 24.

  As shown in FIG. 11, the descending building ventilation member 82 is a long member having a mountain-shaped cross section, and has a configuration in which a flat plate member 88 is arranged on the upper surface and a ventilation member 90 is provided on both sides of the lower surface of the flat plate member 88. Yes. The flat plate member 88 is a plate-like member having waterproofness, and the ventilation member 90 is a breathable member having the same configuration as the above-described ventilation member 50 and the like. The space between the ventilation members 90 is an opening surface.

  FIG. 13 shows a water drain plate 84. The draining plate 84 is V-shaped and attached at least above the inclination of the opening 24. As shown in the figure, the draining plate 84 is formed so as to extend obliquely downward from the ridge line portion when attached to the down ridge 80. A sealing member 85 formed in a sponge shape is attached to the upper edge of the draining plate 84. The sealing member 85 can be appropriately deformed and has sufficient water tightness.

  Further, the downcomer ventilation member 82 is provided with a flange member 92. The eaves member 92 is provided with a flat plate member 88 extending forward. The eaves member 92 is bent in a mountain shape along the descending building ventilation member 82, extends from the descending building ventilation member 82 to the upper side of the descending building 80, and covers the upper part of the draining plate 84. In addition, the eaves member 92 may be provided in the lower part of the descending wing ventilation member 82 in the same manner as the upper part.

  If the descending ridge ventilation member 82 and the draining plate 84 are attached to the opening 24 of the descending ridge 80 as described above, the roof tile 94 is mounted as shown in FIG. 12, and the crown tile 94 is attached thereon.

  Next, the ventilation effect in the down wing 80 will be described.

  The air behind the shed flows into the inside of the ventilation member 90 from the opening 24 provided on the lower surface of the descending building ventilation member 82, flows out to the lower part of the roof tile 86 through the edge of the ventilation member 90, and the like. To the atmosphere. Air under the roof tile 86 flows into the back of the hut through a path opposite to the above. And the water which flowed on the waterproof cloth stretched on the field board 20 is interrupted by the draining board 84, and falls along the gradient of the roof. This prevents water from flowing into the opening 24. Further, although the side surface of the descending ridge ventilation member 82 is opened, since the slope from the side surface to the opening portion 24 is an ascending slope, the flowing water flows into the opening portion 24 through the ventilation member 90. There is nothing.

  The present invention can be used in a ventilation building of a building.

DESCRIPTION OF SYMBOLS 10 ... Ventilation building 12 ... Ventilation sheet metal building 18 ... Drainage plate 24 ... Opening part 26 ... Sheet metal building 28 ... Building ventilation member 30 ... Top part 32 ... Main inclined plate 34 ... Vertical wall 36 ... Sub-inclined plate 40 ... Waterproof thin plate 42 ... Holding member 50 ... first ventilation member 52 ... second ventilation member 54 ... third ventilation member 60 ... first cutting line 62 ... second cutting line 66 ... central portion 70 ... downward ridge 72 ... drainage plate 82 ... downward ridge ventilation member 84 ... Draining plate 88 ... Flat plate member 90 ... Ventilation member 92 ... Gutter member

Claims (6)

Two field boards faced with a predetermined opening,
A sheet metal ridge attached above the opening;
A building ventilation member provided between the sheet metal building and the field plate,
The sheet metal building includes a top portion, a main inclined portion provided on the left and right from the top portion, a vertical wall portion that is bent at a lower end of the main inclined portion and extends downward, and is bent outward at a lower end of the vertical wall portion. A sub-inclined portion extending to
The ridge ventilation member comprises two waterproof thin plates arranged opposite to each other, and a holding member that allows ventilation between the waterproof thin plates between the two waterproof thin plates,
Further, the ridge ventilation member extends along the sub-inclination portion between the sub-inclination portion and the base plate between a third ventilation member provided along the main inclination portion below the main inclination portion and the sub-inclination portion. And a first ventilation member provided between the first ventilation member and the third ventilation member, and at least one of the second ventilation members provided along the vertical wall portion. Ventilation building.   At least one of the first ventilation member, the second ventilation member, and the third ventilation member is formed by breaking the ridge ventilation member while leaving at least one of the waterproof thin plates and bending the one waterproof thin plate. The ventilation building according to claim 1, wherein:   The ridge ventilation member according to claim 2, wherein a plurality of rupture lines to be broken are formed in the ridge ventilation member, and the formed rupture line is selected so that the ridge ventilation member can be bent at an arbitrary position. Ventilation building.   The at least one waterproof thin plate is cut out, the other waterproof thin plate is cut away to form an opening surface at the center of the lower surface, and the third ventilation member is formed on both sides of the opening surface. The ventilation building of any one of 1-3. It is a descending ridge provided with an opening communicating with the back of the hut at the butt portion of the two terrain plates, with the butt portion of the two terrain plates inclined.
A draining member that surrounds the periphery of the opening and is sharpened at least above the opening toward the upper side in the inclination direction of the descending ridge is provided on the base plate, and the upper portion of the draining member is provided in the ventilation of the ridge. The ventilation building according to any one of claims 1 to 4, wherein the ventilation building is attached to a member. It is a descending ridge provided with an opening communicating with the back of the hut at the butt portion of the two terrain plates, with the butt portion of the two terrain plates inclined.
A down ridge ventilation member that is at least ventable between an opening surface and a side end surface provided on the lower surface, is provided on the field plate so as to cover the opening portion with the opening surface aligned with the opening portion;
Provided with a draining member sharpened upwards above the downward direction of the downward ridge in the opening, and further attached to the upper part of the draining member a flange portion extending from the downward ventilation member,
A downhole ventilation building characterized in that a roof member is provided above the downhill ventilation member.

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