JP2017160730A - Attic ventilation structure and ventilation member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attic ventilation structure capable of reducing the expansion of combustion, by restraining the expansion of the combustion to a sheathing roof board in a fire.SOLUTION: An attic ventilation structure comprises a roof backing 3, a sheathing roof board 4 placed on the roof backing 3, a vertical plate material 6 fixed to the roof backing 3 and a ventilation member 10 provided between the vertical plate material 6 and the sheathing roof board 4 and having a ventilation passage for communicating an attic and outside air. The vertical plate material 6 is arranged so as to form a clearance between the sheathing roof board 4 and itself, and the ventilation member 10 comprises a ventilation part 14 for forming the ventilation passage and a fireproof part 15 arranged so as to cover a sheathing roof board surface by contacting with the sheathing roof board 4 and storing a fireproof member 18 on the inside by being partitioned from the ventilation part 14.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an attic ventilation structure for performing ventilation between an attic and outside air from a ventilation passage between a wall board and a field board, and a ventilation member used for the ventilation structure.

  As an attic ventilation structure related to mounting of eaves ceilings and the like, an attic ventilation structure having a ventilation structure is required in order to prevent attic deterioration and legal requirements. The attic ventilation structure having a ventilation structure requires a ventilation path that communicates the attic and the outside air. As a position for providing this ventilation path, a structure between a base plate and a nose board is known.

  The attic ventilation structure described in Patent Document 1 is such that the top surface of the nose base material is fixed to the small edge surface of the rafter so that there is a gap with respect to the base plate arranged on the top surface of the rafter. The ventilation fitting is fixed so as to be in contact with the outer wall, and the exterior material is fixed to the surface of the nose plate base material via the seal member below the ventilation fitting. According to this structure, the gap formed by the ventilation fitting and the gap formed between the nasal plate base material and the field plate serve as a ventilation path, and ventilation can be performed from the gap between the field plate and the nasal plate.

  By the way, both the attic ventilation structure described in patent document 1 is the structure which attaches the ventilation metal fitting which has a ventilation path to the surface of a field board, but the said ventilation path becomes an air supply path in the case of a fire. There is a problem that leads to expansion of combustion.

  For this reason, an attic ventilation structure with fire resistance is required, and the attic ventilation structure described in Patent Document 2 is provided with a ventilation fitting so that it projects below the base plate, and the exterior material is attached to the ventilation fitting. In the ventilation structure that is fixed to the surface of the nose plate base material so as to contact the lower side, a non-combustible volume expansion material is provided on the inner wall of the ventilation fitting, and in the event of a fire, the expansion material expands to close the ventilation path The air supplied to the back of the ceiling is cut off.

JP 2010-265651 A JP2013-36204A

  By the way, regarding the fireproof performance in the attic ventilation structure, not only the blockage of air into the eaves but also the fireproof performance of the field board itself is required. However, in the structures of Patent Documents 1 and 2, no consideration is given to improving the fire resistance of the field board, and the temperature of the field board is increased when the high-temperature ventilation fitting comes into contact with the field board. May cause this.

  Therefore, the technical problem to be solved by the present invention is to provide an attic ventilation structure and a ventilation member capable of suppressing the spread of combustion to the field board during a fire and reducing the expansion of combustion.

  In order to solve the above technical problem, the present invention provides an attic ventilation structure and a ventilation member having the following configurations.

According to the first aspect of the present invention, a roof base, a field plate placed on the roof base, a vertical plate material arranged on the outside of the roof base, and between the vertical plate material and the field plate An attic ventilation structure provided with a ventilation member provided with a ventilation path provided to communicate the attic and the outside air,
The vertical plate member is disposed so as to form a gap with the field plate,
The ventilation member is
A ventilation part forming the ventilation path;
A fireproof part arranged to cover the surface of the base plate, and partitioned from the ventilation part to house a fireproof member inside;
An attic ventilation structure is provided.

  According to the 2nd aspect of this invention, the said fireproof part is arrange | positioned between the said ventilation part and a field board, The attic ventilation structure of a 1st aspect is provided.

  According to a third aspect of the present invention, there is provided the attic ventilation structure according to the first or second aspect, wherein the ventilation member has a fixing piece for fixing the ventilation part below the ventilation part. provide.

According to the fourth aspect of the present invention, the ventilation member has a fixing piece arranged in parallel with a separation distance corresponding to the thickness width of the vertical plate member below the ventilation portion,
The vertical plate member is fixed in a state in which an upper end is inserted between the fixing pieces, and provides the attic ventilation structure according to the third aspect.

  According to a fifth aspect of the present invention, there is provided the attic ventilation structure according to the third aspect, wherein the ventilation portion is formed in a cylindrical shape having a vent on a side wall and is disposed in the gap.

  According to a sixth aspect of the present invention, in the first aspect, the ventilation portion is provided with a thermal expansion material that closes the ventilation port and blocks air in a high temperature environment on the inner surface side. An attic ventilation structure according to any one of the fourth aspects is provided.

According to the seventh aspect of the present invention, the vertical base plate disposed outside the roof base so as to form a gap between the roof base, the field board placed on the roof base, and the field board. A ventilation member used in an attic ventilation structure provided between the vertical plate member and the field plate, wherein a ventilation path communicating the attic and the outside air is provided,
A ventilation part forming the ventilation path;
A fire-resistant portion arranged to contact the field plate and cover the surface of the field plate, and to be partitioned from the ventilation portion and store a fire-resistant member therein;
A ventilation member is provided.

  According to the present invention, when a gap provided between a vertical plate member such as a wall, a nose cover, and a windbreak plate and a field plate is used as a ventilation path, and a ventilation fitting constituting the ventilation path is disposed in the gap, By covering the surface of the field plate on the ventilation fitting and providing a fireproof part that encloses the refractory material, the temperature increase of the field plate and the spread of combustion can be prevented.

  Further, according to the second aspect of the present invention, the ventilation plate is secured by the ventilation member fixed on the upper side of the vertical plate member, and the vertical plate member can be fixed so that the ventilation member is abutted against the field plate. It is possible to reduce the trouble of adjusting the accuracy of the attachment position and the attachment angle of the vertical plate member, and the assembly work can be reduced.

According to the 3rd aspect of this invention, since a ventilation part is comprised by the cylinder shape, it is hard to enter rain, garbage, etc. Moreover, since a decorative board can also be attached to a vertical board material, aesthetics can be improved. .
Furthermore, by installing a thermal expansion material on the inner surface of the cylindrical ventilation section that closes the vent in a high temperature environment such as when a fire breaks out and blocks the flow of air, it interferes with installation work. The function of the thermal expansion material can be ensured without fail.

It is a figure which shows the example of the attic ventilation structure concerning embodiment of this invention. It is a partial cross section expansion perspective view of the attic ventilation structure concerning 1st Embodiment of this invention. It is sectional drawing which shows typically the attic ventilation structure structure concerning 1st Embodiment of this invention. It is a perspective view which shows the structure of the ventilation metal fitting used for the attic ventilation structure of FIG. It is sectional drawing which shows the structure of the ventilation metal fitting of FIG. It is a figure which shows the modification of the attic ventilation structure concerning 1st Embodiment of this invention. It is explanatory drawing which shows the ventilation path | route of the attic ventilation structure of FIG. It is sectional drawing which shows typically the structure of the attic ventilation structure concerning 2nd Embodiment of this invention. It is sectional drawing which shows typically the structure of the attic ventilation structure concerning 3rd Embodiment of this invention. It is sectional drawing which shows typically the structure of the attic ventilation structure concerning 4th Embodiment of this invention.

  Hereinafter, a ventilation member according to an embodiment of the present invention and an attic ventilation structure using the ventilation member will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a diagram illustrating an example of an attic ventilation structure according to an embodiment of the present invention. FIG. 2 is a partial cross-sectional perspective view of the attic ventilation structure according to the first embodiment of the present invention. The attic ventilation structure according to the present embodiment will be described as an attic ventilation structure on the flat side as shown in FIG. 1, but can be similarly applied to the wife side. The attic ventilation structure according to the present embodiment ventilates the attic by providing a vent between the gust 102 or nose cover 103 used for the ceiling 101 of the house 100 and the ceiling 101.

  FIG. 2 is a partial cross-sectional perspective view of the attic ventilation structure of the present invention. FIG. 3 is a cross-sectional view schematically showing the eaves tip structure according to the first embodiment of the present invention, and corresponds to a cross-sectional view taken along line III-III in FIG. 2 and 3 illustrate an attic ventilation structure using a nose cover as an example.

  In the attic ventilation structure 1 according to the present embodiment, the vertical plate material according to the present invention is used as the base plate 6 for hiding the nose as described above. In the attic ventilation structure 1 according to the present embodiment, the field board 4 is placed on the roof base. Note that the rafter 3 is usually used as the roof base. That is, a base plate 4 is laid on the rafter 3 and a roofing decorative material 5 such as a tile is placed thereon. A draining plate (not shown) is provided at the tip portion of the field plate 4.

  In addition, a nose plate base material 6 as an example of a vertical plate material of the present invention is provided at the tip of the rafter 3 via a vent fitting 10. The nose board base material 6 is arranged in a direction intersecting with the plurality of rafters 3 arranged at a predetermined interval. In many cases, the vertical plate material is directly fixed to the roof base (rafter), but the vertical plate material only needs to be disposed outside the rafter and is not required to be fixed to the rafter itself.

  The nose board base material 6 is formed of a flat fiber-mixed cement calcium silicate material having a predetermined fire resistance. The thickness of the nasal base material 6 is preferably 6 mm to 25 mm. In the present embodiment, those having a thickness of 10 to 20 mm, further 12 to 16 mm are preferable from the viewpoint of fire resistance. Here, the predetermined fire resistance performance of the eaves ceiling member 2 is, for example, when a predetermined fire resistance test is performed on an eave on which the eaves ceiling member 2 is laid, between the eaves back space and the wall. It shows the performance that makes it possible to maintain the temperature of the back side of the board (referred to as a standard board) to be maintained at a constant temperature or lower for a predetermined time. Including performance defined in all future evaluation tests.

  In the present embodiment, as the other material of the nose board base material 6, a cement-based material such as a fiber-mixed cement calcium silicate board, a fiber reinforced cement board, a lime / calcium silicate board, or a hard wood piece cement board is used. it can. If fire resistance is not a problem, woody materials such as wood can also be used.

  A nose cover decorative plate 7 is provided on the surface of the nose plate base material 6. The nose cover decorative plate 7 is made of a cement-based extrusion molded body having a specific gravity of about 0.8 to 1.5, and is preferably high in fracture due to multiple cracks even when subjected to bending stress, even for the action of tensile stress. Those having toughness are preferably used. More specifically, an extruded product of a fiber-reinforced hydraulic composition, which has the property of causing multiple cracks to break upon bending loading can be suitably used.

  In the present embodiment, the nose cover decorative plate 7 is a member on a long flat plate having a longitudinal dimension of 3000 mm, a height dimension of approximately 180 mm, and a thickness dimension of approximately 25 mm, for example. In addition, the magnitude | size of the nose concealment board 7 is not necessarily limited to the said size, It can change suitably according to the magnitude | size of an eaves back ceiling structure.

  The field edge 8 is a member for fixing the eaves ceiling member 2, and is connected to the vertical field edge 8a arranged at a predetermined interval in parallel with the rafters 3, and to both ends of each vertical field edge 8a. And a lateral edge 8b for reinforcement.

  The eaves ceiling member 2 is fixed to the field edge 8 and the wall 9 so as to be substantially horizontal. The wall 9 has a structure in which a ventilation trunk edge 9b and a siding material 9c are laminated on the outer surface of the column 9a. An interior material (not shown) is provided on the indoor side of the pillar 9a. As the siding material 9c, for example, a ceramic-based material can be suitably used. For fixing the eaves ceiling member 2 to the field edge 8, a fixing means such as a nail or a drill screw is used. In addition, the fixing method of the eaves ceiling member 2 is not restricted above.

  In the attic ventilation structure according to the present embodiment, as shown in FIG. 3, a gap is formed between the nose base material 6 and the base plate 4 as a ventilation structure between the attic and the outside air, and the gap is formed between the attic and the outside air. And the ventilation path. A ventilation fitting 10 is provided in the ventilation path to prevent intrusion of rainwater and the like.

  As shown in FIGS. 4 and 5, the ventilation fitting 10 is formed of a thin metal plate. The ventilation fitting 10 includes a cylindrical main body 11 and a pair of fixing pieces 13 a and 13 b provided below the main body 11.

  The upper surface 11 u of the main body 11 is configured to be substantially the same as the inclination angle of the rafter 3, and as shown in FIG. 3, when the base plate 6 is fixed to the rafter 3, almost the entire surface contacts the lower surface of the field plate 4. Touch.

  As described above, the main body portion 11 is partitioned vertically by the partition wall 12, and the lower side is the ventilation portion 14 and the upper side is the fireproof portion 15.

  A large number of slit-shaped vent holes 16 are provided on the outer surface of the ventilation portion 14 and the wall surface on the rafter side. A ventilation path that connects the eaves and the outside air extending in the thickness direction of the base plate can be secured through the ventilation holes 16 provided on both side surfaces.

  A thermal expansion material 17 for blocking the ventilation path can be provided on the inner wall of the ventilation portion 14 in the event of a fire or the like. The thermal expansion material 17 expands when the surroundings become hot due to a fire or the like, closes the vent 16 of the ventilation portion 14, and prevents high-temperature air or the like from flowing into the attic.

  The refractory part 15 has a sealed space partitioned from the ventilation part 14 by the partition wall 12 and houses the refractory member 18 therein. As the refractory member 18, it is possible to use a nonflammable material used as a refractory material. However, glass wool, ceramic wool, etc. can be used because they can be filled in advance before being transported to a construction site and are lightweight. Preferably used.

The refractory section 15 covers the surface of the base plate 4 and prevents the base plate 4 from becoming hot and burning in the event of a fire by the refractory member 18 housed inside. Moreover, since the refractory member 18 is sealed in the refractory portion 15 made of metal, the refractory performance can be maintained high. In particular, the fire resistance can be further maintained by arranging the fireproof portion at a position interposed between the ventilation portion and the field plate, that is, by making the ventilation portion and the field plate not in contact with each other.

  The size of the fireproof part 15 may be determined in consideration of the functions of the ventilation part 14 and the fireproof part 15 with respect to the main body part 11. As an example, since the size of the gap between the base plate 4 and the nose plate base material 6 is determined, the fire resistance performance of the fire resistant member 18 in the fire resistant portion 15 and the effective area of the ventilation path of the vent portion 14 are compared. Can be determined.

  The pair of fixing pieces 13 a and 13 b are provided so as to be flush with the side surface of the ventilation portion 14 and extend below the ventilation portion 14. The fixing pieces 13 a and 13 b are provided in parallel at a distance T <b> 1 corresponding to the thickness dimension of the nose plate base material 6. The upper end of the nose plate base material 6 is inserted into a gap 13s formed between the pair of fixed pieces 13a and 13b. In the present embodiment, the pair of fixing pieces 13a and 13b are formed of flat plates provided in parallel with each other in accordance with the surface shape of the nose plate base material 6, but are used for preventing the dropping of ribs and grooves on the surface. These means may be provided so as to be engaged with the nose base material.

  Further, the fixing pieces 13 a and 13 b do not need to be provided over the entire length of the ventilation fitting 10, and may be provided partially as long as the fixing pieces 13 a and 13 b can be attached to the nose plate base material 6. Further, the rafter-side fixing piece 13a is longer than the outer fixing piece 13b, and the fixing piece 13a is located below the lower end of the small edge surface 3a when the rafter 3 is attached to the small edge surface. By configuring, rattling during installation is prevented.

  The ventilation fitting 10 is fixed to the small edge surface 3a of the rafter 3 by inserting screws 19 into screw holes respectively provided in the fixing pieces 13a. The nose plate base material 6 is inserted and fixed in a gap 13s formed between the fixing pieces 13a and 13b.

  Moreover, as shown in FIG. 3, the nose masking decorative board 7 can determine an attachment position by abutting an upper surface with the lower end of the outer fixing piece 13b.

  As shown in the modification of FIG. 6, a positioning member 20 for positioning the nose masking decorative plate 7 may be separately provided on the outer surface of the ventilation fitting 10. In this modification, the positioning member 20 is configured by a flat plate-like member that protrudes outward from the main body portion 11 of the ventilation fitting 10. The nose cover decorative plate 7 can determine the mounting height position and direction by bringing its upper end into contact with the lower end of the guide member 16.

  Next, the construction method of the attic ventilation structure concerning this embodiment is demonstrated. The rafter 3 that is the framework of the eaves structure is assembled. Next, the ventilation fitting 10 is fixed to the small edge surface 3a of the rafter 3 so that the upper surface of the rafter 3 and the upper surface 11u of the ventilation fitting are substantially flush with each other.

  Next, the base plate 4 is placed on the upper surface of the rafter 3. The field plate 4 comes into contact with and is covered with the upper surface 11 u of the ventilation fitting 10.

  Subsequently, the dimension of the eaves ceiling member 2 and the nose board base material 6 is determined, and the eaves ceiling member 2 and the nose board base material 6 are appropriately cut into sizes according to the building. The size adjustment of the nasal base material 6 is performed in a state where the upper end of the nasal base material 6 is inserted into the gap 13s formed between the fixing pieces 13a and 13b and the nasal base material 6 is assembled to the ventilation fitting 10. It is performed so as to match the height position of the eaves ceiling member 2.

  In addition, the dimension of the eaves ceiling member 2 determines the dimension of the eaves ceiling so that the front end of the eaves side contacts the surface or lower end of the nose plate base material 6 on the rafter side. Thereafter, the eaves ceiling member 2 is aligned so that the eaves ceiling member 2 abuts against the lateral edge 8b and the wall 9.

  The sized nose plate base material 6 is fixed to the small edge surface 3a of the rafter 3 while being inserted into the gap 13s. Next, the eaves ceiling member 2 is attached to the field edge 8. After the eaves ceiling member 2 is attached, the gap between the eaves ceiling member 2 and the nose plate base material 6 is sealed with a sealing material.

  Thereafter, the height position of the nose cover decorative plate 7 is adjusted, and the nose cover decorative plate 7 is fixed to the nose plate base material 6 using screws or nails.

  In the eaves-backed ceiling structure according to the present embodiment configured as described above, the ventilation fitting 10 is arranged at the upper end portion of the nose base material 6 as shown in FIG. In the area of the gap 21, it is possible to secure a ventilation path that connects the outside air and the inside of the eaves. Further, since the ventilation portion 14 is provided in the ventilation path, it is possible to effectively prevent rainwater and the like from entering.

  In addition, a ventilation path is secured by the ventilation fitting 10 positioned above the nose plate base material 6, and the ventilation fitting 10 covers the lower surface of the base plate 4 with a fireproof portion 15 in which a fireproof member 18 is housed. In the event of a fire, the temperature of the base plate 4 is prevented from rising and the base plate 4 is prevented from burning.

(Second Embodiment)
Next, an attic ventilation structure according to a second embodiment of the present invention will be described. FIG. 8: is sectional drawing which shows typically the structure of the attic ventilation structure concerning 2nd Embodiment of this invention. In the attic ventilation structure 1a according to the present embodiment, the eave ceiling is not provided, the wall 9 is fixed to the rafter 3, and a ventilation path is provided between the wall 9 and the ceiling.

  In the attic ventilation structure 1a according to the present embodiment, the wall 9 is used as the vertical plate material according to the present invention as described above. In the attic ventilation structure 1a according to the present embodiment, the base plate 4 is laid on the rafter 3 and the roof decorative material 5 such as a tile is placed thereon. A draining plate (not shown) is provided at the tip portion of the field plate 4. Further, a field edge 8 and a column 8 c are provided at the tip of the rafter 3.

  Further, a wall 9 is provided at the tip of the rafter 3 with a vent fitting 21 fixed to the upper end. The wall 9 has a structure in which a plywood 9a provided on the outer surface of the column 8c, a ventilation trunk edge 9b, and a siding material 9c are laminated. An interior material (not shown) is provided on the house side of the column 8c. As the siding material 9c, for example, a ceramic-based material can be suitably used.

  As shown in FIG. 8, the ventilation fitting 21 is formed of a thin metal plate. The ventilation fitting 21 is in contact with the lower surface of the base plate 4 and covers a fire-resistant part 22 that covers the base plate, a cylindrical ventilation part 23 that is positioned below the fire-resistant part 22 and partitioned by the partition wall 12, and a ventilation part 23, and a fixing piece 24b provided below 23.

  The refractory part 22 is divided with respect to the ventilation part 23, and is configured to project outward from the ventilation part 23. A refractory material 18 is housed inside the refractory section 22. By configuring the refractory portion 22 to be large, the area covering the base plate 4 can be increased, and the temperature rise of the base plate 4 and the spread of combustion can be prevented in a wide range.

  A large number of slit-shaped vent holes 16 are provided on the outer surface of the ventilation portion 23 and the wall surface on the rafter side. A ventilation path connecting the back of the ceiling and the outside air can be secured through the ventilation holes 16 provided on both side surfaces. The outer wall surface is provided with a ventilation hole 16 on the lower side, and rainwater or the like that has entered the ventilation part 23 is discharged through the ventilation hole 16.

  The ventilation portion 23 is provided with a baffle plate 25 for preventing rainwater from entering.

  Further, the fixing piece 24b is provided with a screw hole at a corresponding position, and the screw 19 is inserted into the screw hole to fix the ventilation fitting 21 to the field edge 8 from the surface of the plywood 9a. Then, the ventilation trunk edge 9b and the siding material 9c are installed on the surface of the plywood 9a.

  In addition, the attachment structure of the ventilation metal fitting 21 to the wall 9 may be configured to include a pair of fixing pieces arranged to face each other in the thickness direction of the wall 9 so as to sandwich the entire wall 9.

(Third embodiment)
FIG. 9: is sectional drawing which shows typically the structure of the attic ventilation structure concerning 3rd Embodiment of this invention. In the attic ventilation structure 1b according to this embodiment, the eaves ceiling is not provided, but a ventilation path is provided between the wall 9 and the ceiling.

  In the attic ventilation structure 1b according to the present embodiment, the wall 9 is used as the vertical plate material according to the present invention as described above. In the attic ventilation structure 1b according to the present embodiment, the base plate 4 is laid on the rafter 3 and the roof decorative material 5 such as a tile is placed thereon. A draining plate (not shown) is provided at the tip portion of the field plate 4. Further, a field edge 8 and a column 8 c are provided at the tip of the rafter 3.

  A wall 9 is provided on the outer surface of the column. The wall 9 is configured to have a height such that a gap is formed between the wall plate 4 and the plywood 9a provided on the outer surface of the column 8c, the ventilation trunk edge 9b, and the siding material 9c. It has a laminated structure. An interior material (not shown) is provided on the house side of the column 8c. As the siding material 9c, for example, a ceramic-based material can be suitably used.

  The ventilation fitting 26 is made of a thin metal plate, and is provided in a gap between the field plate 4 and the wall 9 as shown in FIG. The ventilation fitting 26 has a main body portion 11a configured in a cylindrical shape and a fixing piece 29a provided below the main body portion 11a. The main body 11a is partitioned vertically by the partition wall 12, and a fireproof part 27 is provided on the upper side and a ventilation part 28 is provided on the lower side. In the present embodiment, the main body 11 a is configured to be larger in the thickness direction than the wall 9, and the area that contacts the base plate 4 is increased.

  The refractory portion 27 contacts the lower surface of the field plate 4 and covers the field plate 4 with the upper surface. A refractory material 18 is housed inside the refractory section 27. By configuring the main body portion 11a to be large, the area covering the base plate 4 can be increased, and the temperature rise of the base plate 4 and the spread of combustion can be prevented in a wide range.

  A large number of slit-shaped vent holes 16 are provided on the outer surface of the vent portion 28 and the wall surface on the rafter side. A ventilation path connecting the back of the ceiling and the outside air can be secured through the ventilation holes 16 provided on both side surfaces. The outer wall surface is provided with a ventilation hole 16 on the lower side, and rainwater or the like that has entered the ventilation part 28 is discharged through the ventilation hole 16.

  The ventilation portion 28 is provided with a baffle plate 25 for preventing rainwater from entering.

  The fixing piece 24a is provided with a screw hole, and the screw 19 is inserted into the screw hole to fix the ventilation fitting 26 to the wall 9 and the field edge 8.

(Fourth embodiment)
FIG. 10: is sectional drawing which shows typically the structure of the attic ventilation structure concerning 4th Embodiment of this invention. In the attic ventilation structure 1c according to the present embodiment, the eaves ceiling is not provided, but a ventilation path is provided between the wall 9 and the ceiling.

  In the attic ventilation structure 1 c according to the present embodiment, the ventilation fitting 29 is fixed to the field board 4. In the attic ventilation structure 1c according to the present embodiment, the base plate 4 is laid on the rafter 3 and the roof decorative material 5 such as a tile is placed thereon. A draining plate (not shown) is provided at the tip portion of the field plate 4. Further, a field edge 8 and a column 8 c are provided at the tip of the rafter 3.

  A wall 9 is provided on the outer surface of the column. The wall 9 is configured to have a height such that a gap is formed between the wall plate 4 and the plywood 9a provided on the outer surface of the column 8c, the ventilation trunk edge 9b, and the siding material 9c. It has a laminated structure. An interior material (not shown) is provided on the house side of the column 8c. As the siding material 9c, for example, a ceramic-based material can be suitably used.

  The ventilation fitting 29 is made of a thin metal plate, and is provided at the tip of the field plate 4 as shown in FIG. The ventilation fitting 29 includes a fixed piece 30 attached to the tip portion of the field plate, a fire-resistant part 31 connected to the fixed piece and disposed on the lower surface side of the field plate 4, and a ventilation section provided below and separated from the fire-resistant part 31. Part 32.

  The fixed piece 30 is configured in a bowl shape, extends from the distal end side of the field plate 4 to the upper surface, and engages with the field plate 4. The fixing piece 30 is provided with a screw hole, and is screwed to the base plate 4 with a screw 19.

  The refractory part 31 is a box-shaped member having an upper opening, and the refractory material 18 provided therein is sealed by contacting the lower surface of the field board 4.

The ventilation part provided below the refractory part 31 is a member having a substantially U-shaped cross section that is located outside the wall 9 and closes the gap between the wall 9 and the base plate 4. The end portion contacts the surface of the wall 9 and is sealed with a seal member (not shown).
In addition, a large number of slit-shaped vents 16 are provided on the outer wall surface, and a vent path that connects the back of the ceiling and the outside air can be secured.

  As described above, according to the eaves-backed ceiling structure of the present embodiment, the gap located at the upper end of the vertical board material such as a nose cover or wall and the field board is used as a ventilation path, and a ventilation fitting is provided in the gap. Prevent rainwater and other intrusions. In addition, the upper part of the metal fitting is composed of a refractory part containing a refractory material, and the front surface is in contact with the base plate 4 to cover the surface, thereby preventing the temperature of the base plate 4 from increasing and the spread of combustion. be able to.

  In addition, this invention is not limited to said each embodiment, It can implement in another various aspect. For example, the vent fitting of the present invention is made of metal from the viewpoint of preventing combustion, but can also be made of, for example, a ceramic material.

1,1a, 1b, 1c Attic ventilation structure 2 eaves ceiling member 3 rafter 3a rafter facet 4 field base plate 5 roof decorative material 6 nose plate base material 7 nose cover plate 8 field edge 8c pillar 9 wall 10, 21, 26 ventilation Metal fittings 11, 11 a Main body 11 u Ventilation metal fitting upper surface 12 Partition walls 13 a, 13 b, 24 b, 29 a, 30 Fixed pieces 14, 23, 28, 32 Ventilation parts 15, 22, 27, 31 Refractory parts 16 Ventilation holes 17 Thermal expansion material 18 Refractory member 19 Screw 20 Positioning member 25 Baffle plate 100 House 101 Ceiling 102 Gaze 103 Nasal concealment

Claims (7)

A roof base, a field board placed on the roof base, a vertical board disposed on the outside of the roof base, and an aeration provided between the vertical board and the field board to communicate the attic and the outside air. An attic ventilation structure comprising a ventilation member with a path,
The vertical plate member is disposed so as to form a gap with the field plate,
The ventilation member is
A ventilation part forming the ventilation path;
A fireproof part arranged to cover the surface of the base plate, and partitioned from the ventilation part to house a fireproof member inside;
An attic ventilation structure characterized by comprising:   The attic ventilation structure according to claim 1, wherein the refractory portion is disposed between the ventilation portion and a field plate.   The attic ventilation structure according to claim 1, wherein the ventilation member has a fixing piece for fixing the ventilation part below the ventilation part. The fixing pieces are arranged side by side with a separation distance corresponding to the thickness width of the vertical plate member, and the vertical plate member is fixed in a state where an upper end is inserted between the fixing pieces. Item 4. The attic ventilation structure according to item 3.   The attic ventilation structure according to any one of claims 1 to 4, wherein the ventilation portion is configured in a cylindrical shape having a ventilation hole in a side wall, and is disposed in the gap.   The said ventilation part is provided with the thermal expansion material which obstruct | occludes the said vent hole in the inner surface side in the high temperature environment, and interrupts | blocks air, It is characterized by the above-mentioned. Attic ventilation structure. A roof base, a base plate placed on the roof base, and a vertical plate disposed on the outside of the roof base so as to form a gap between the base plate, and communicates the attic and the outside air. A ventilation member used in an attic ventilation structure provided between the vertical board and the field board,
A ventilation part forming the ventilation path;
A fire-resistant portion arranged to contact the field plate and cover the surface of the field plate, and to be partitioned from the ventilation portion and store a fire-resistant member therein;
A ventilation member comprising:

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