JP2004218216A - Ridge ventilation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ridge ventilation device for surely cutting off a ventilation flue when a flame, a hot blast or the like is given in the case of fire in a ridge ventilation system. <P>SOLUTION: The ridge ventilation device provided to the ridge of a roof includes the upper part 1 of a ridge ventilation device body having a ventilating gallery 10 forming a plurality of ventilating openings 11 therein, a partition plate 2 placed downward the upper part 1 of the body and forming a recess 22 in a place corresponding to at least the ventilating gallery 10, the lower part 4 of the body placed downward the partition plate 2 and leading rain water, etc. forcibly entering from the ventilating openings 11 to the lower part of an eaves and a heat foamable fire resistive sheet 3 placed between the recess 22 of the partition plate 2 and the upper part 1 of the body and cutting off the ventilating openings 11 of the ventilating gallery 10 by heating expansion. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a ridge ventilation system, which creates an air flow in the attic, is ideal for removing hot air and moisture from the attic, preventing corrosion of attic materials such as wood, and blocking a ventilation path in the event of a fire or the like. And a building ventilation system for preventing fire spread.
[0002]
[Prior art]
In the hot and humid climate of Japan, adequate ventilation is required. For this reason, conventionally, for example, in order to perform ventilation in the roof of a hut, a ventilation path connecting the outside and the back of the eave is provided in the eave ceiling. However, the conventional attic ventilation does not allow sufficient ventilation, so that hot air is trapped in summer and dew easily forms in winter, causing deterioration of the framework behind the ceiling.
[0003]
Therefore, a ventilating system is provided in the ridge, which is the roof top, and a ridge ventilation system with good ventilation efficiency even with a small opening is attracting attention.
[0004]
By the way, in the above-mentioned attic ventilation system, there is proposed a structure for preventing the invasion of flames and hot air by using a thermally foamed refractory material which expands due to heat in a ventilation passage in case of a fire in a neighboring house or the like ( For example, see Patent Document 1). In this type of structure, the thermally foamed refractory material is heated and expanded by a flame or hot air at the time of a fire, thereby blocking a ventilation path and preventing a fire from spreading from a neighboring house.
[0005]
In the above-described ridge ventilation system, a configuration in which the ventilation path is shut off in preparation for a fire or the like is desired. In particular, since the ridge ventilation system has high ventilation efficiency, there is a concern that the fire spread may be accelerated by the so-called chimney effect unless the ventilation path is shut off in the event of a fire or the like. For this reason, in the ridge ventilation system, a structure is conceivable in which the above-mentioned thermally foamable refractory material is used to prevent the intrusion of flame or hot air.
[0006]
In the ridge ventilation system, the present inventors have arranged a thermal foaming refractory material in a ventilation path between an upper opening of the ridge ventilation system and a partition plate, and have studied diligently heat insulation characteristics and the like. As a result, it was found that a sufficient insulation property could not be obtained simply by arranging the thermally foamed refractory material in the ventilation passage.
[0007]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2000-204697
[Problems to be solved by the invention]
The present invention has been made in view of the above-mentioned conventional problems, and provides a ridge ventilation device that reliably shuts off a ventilation path when a fire or hot air at the time of a fire is given in a ridge ventilation system. The purpose is to do.
[0009]
[Means for Solving the Problems]
The present invention relates to a ridge ventilation device provided on a ridge portion of a roof, wherein a main body upper member having a ventilation gallery portion formed with a plurality of ventilation openings, and a ventilation gallery portion disposed at a lower portion of the main body upper member. A partition plate having a recess formed at a location corresponding to the main body, a lower body member disposed at a lower portion of the partition plate for guiding rainwater or the like that has entered through the ventilation opening to a lower part of the eaves, and a recess of the partition plate. And a heat-foamable refractory sheet that is disposed between the upper body member and expands when heated and blocks the ventilation opening of the ventilation gallery.
[0010]
The main body lower member may be formed of a resin member that melts at a temperature lower than the expansion start temperature of the thermally foamable refractory sheet.
[0011]
The resin member may be a polymer resin based on a monomer having 2 to 4 carbon atoms and having a softening temperature of 80 to 140 ° C.
[0012]
According to the configuration described above, even in a building ventilation system with good ventilation efficiency, when a flame or hot air at the time of a fire is given, the heat-foamable refractory sheet expands, closes the ventilation opening, and blocks the ventilation path. be able to.
[0013]
In addition, when a resin member that melts at a temperature lower than the expansion start temperature of the heat-expandable refractory sheet is used in the lower part of the main body, the heat-expandable refractory sheet can be expanded and expanded uniformly, and the ventilation path can be more reliably blocked.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic side view showing a ridge ventilation device according to an embodiment of the present invention, FIG. 2 is a side view of a main portion showing a ridge ventilation device according to an embodiment of the present invention, and FIG. 3 is an embodiment of the present invention. FIG. 4 is an exploded perspective view showing each component of the ridge ventilation apparatus according to the embodiment, FIG. 4 is a perspective view of a main part showing the ridge ventilation apparatus according to the embodiment of the present invention, and FIG. 5 is a perspective view of the ridge ventilation apparatus according to the embodiment of the present invention. It is an outline side view showing the state where the ventilation passage of the ridge ventilation device shown was cut off.
[0015]
As shown in the figure, the ridge ventilation device in this embodiment is provided in a ridge at the top of a roof. A roof member 51 made of, for example, a slate tile is laid on the roof land 50. The ventilation passage 30 is provided in the ridge portion of the roof land 50. The ventilation passage 30 and a ridge ventilation device of this embodiment described later form a ventilation path from the attic to the outside. Hot air, moisture, etc. trapped in the attic and the like are discharged outside through this ventilation path. In the figure, a dashed arrow 31 indicates a flow path through which moisture, hot air, and the like flow, and moisture, hot air, and the like are discharged from the attic through the ventilation passage 30 and the ridge ventilation device.
[0016]
Now, the ridge ventilation device in this embodiment includes a main body upper member 1 and a partition plate 2 arranged thereunder. These two members are formed by, for example, pressing a galvalume steel plate. The body upper member 1 is provided with a plurality of ventilation openings 11 for ventilation, and a ventilation gallery 10 is formed. At one end of the ventilation port 11, a fin 12 bent downward is formed. The gap A (see FIG. 2) between the lowermost part of the fin 12 and the upper part 1 of the main body is set to 5 mm in this embodiment.
[0017]
In the partition plate 2 at the lower part of the ventilation gallery 10 in the upper part 1 of the main body, a recess 22 is formed by press working or the like in order to accommodate the fin 12 bent downward to form the ventilation opening 11. Is provided. In this embodiment, the gap B (see FIG. 2) between the upper part of the recess 22 and the upper part 1 of the main body is set to 10 mm.
[0018]
Further, on the eaves side of the partition plate 2, ventilation holes 30 and ventilation holes for exhausting moisture, hot air, and the like from the attic flowing through the opening of the lower part 4 of the main body 4 to be described later with the partition plate 2 on the ridge side. 21 are provided.
[0019]
The lower part 4 of the main body is provided below the recess 22 of the partition plate 21 so that rainwater or the like that has entered from the ventilation gallery 10 does not enter the room. The main body lower portion 4 is formed of a resin molded product such as polypropylene. The reason that the main body lower portion 4 is formed of a resin molded product will be described later.
[0020]
As shown in FIG. 3 and FIG. 4, a plurality of partition plates 41 are provided in the lower part 4 of the main body in order to prevent rainwater or the like from climbing up. As shown in FIG. 4, a drainage port 42 is provided below the eaves of the lower part 4 of the main body, and drains rainwater and the like flowing from the ventilation openings 11 of the ventilation gallery 10 to the eaves side.
[0021]
As shown by a dashed arrow 31 in FIG. 1, hot air, moisture and the like in the attic pass through the ventilation passage 30, pass through the opening between the partition plate 2 and the lower body 4, pass through the lower body 4, and pass through the ventilation holes of the partition plate 2. After passing through 21, it is discharged to the ventilation opening 11 of the ventilation gallery 10.
[0022]
This ridge ventilation device is installed on the roof ridge as follows. First, the sealer 7 made of EPDM or the like is arranged on the roof member 51 on the roof land 50, and the main body lower part 4 is arranged. On the upper surface of the recess 22 of the partition plate 2, a heat-foamable refractory sheet 3 is provided as described later. Then, the partition plate 2 is further laid thereon, and the main body upper portion 1 is further laid thereon. These members are fixed on the roof 50 with screws 8 reaching the roof 50, and the ridge ventilation device is installed in the ridge portion of the roof.
[0023]
End caps 7 are attached to both ends of the ridge ventilation device. Furthermore, a dew condensation preventing member 5 made of polyethylene foam is attached to the center of the partition plate 2.
[0024]
Now, in this embodiment, a thermofoamable refractory sheet 3 having a thickness of about 1 mm to 3 mm is arranged between the recess 22 of the partition plate 2 and the ventilation gallery 10 of the upper part 1 of the main body. Specifically, the heat-foamable refractory sheet 3 is attached on the steel plate in the recess 22 of the partition plate 2 with an adhesive tape or the like. The heat-foamable refractory sheet 3 is made of, for example, a black smoke-containing butyl rubber sheet, and the side facing the ventilation gallery 10 is coated with aluminum foil or aluminum glass cloth. When the temperature exceeds 200 ° C., the thermally foamable refractory sheet 3 expands rapidly, and its volume becomes ten times or more. In this embodiment, the heat-foamable refractory sheet 3 having a thickness of 1 mm and expanding 30 times is used. As the thermally foamable refractory sheet 3, for example, Sekisui Chemical Co., Ltd. product name “Fiblock” can be used.
[0025]
As described above, in this embodiment, the main body lower portion 2 is formed of a resin molded product such as polypropylene. As the resin molded product, a resin molded product that melts at a temperature equal to or lower than the temperature at which the thermally foamable refractory sheet 3 starts thermal expansion is used. This is made of a steel plate as the lower part 4 of the main body, similarly to the partition plate 2, and a heat-expandable refractory sheet 3 is arranged on the partition plate and subjected to a flame leakage test. In some cases, it became uneven depending on the location, and a sufficient blocking property was not obtained in some cases. This is because, as shown in FIG. 1, the hot air flows as indicated by the dashed arrow 31 in FIG. 1, and is heated from the upper surface side of the heat-expandable refractory sheet 3, and the location to be heated varies. it is conceivable that.
[0026]
On the other hand, the lower part 4 of the main body was formed of polypropylene melting at 125 ° C., and the heat-foamable refractory sheet 3 was arranged on the partition plate 2, and a flame leakage test was performed. As a result, as shown in FIG. 5, the lower part 4 made of polypropylene melted, and the lower part 4 was separated from the partition plate 2. However, the heat-foamable refractory sheet 3 on the partition plate 2 was uniformly foamed, and the ventilation opening 11 of the ventilation gallery 10 was securely closed, whereby the ventilation path was cut off.
[0027]
This is because the lower portion 4 of the main body is melted before the temperature reaches 200 ° C. to start the heat-expandable refractory sheet 3, so that the lower side of the partition plate 2 is also exposed to hot air, and the upper side of the heat-expandable refractory sheet 3 is heated. Not only is it heated from below the partition plate 2. As a result, it is considered that the thermally foamable refractory sheet 3 foamed as a whole.
[0028]
For this reason, it is desirable that the main body lower portion 4 be formed of a member that melts at a temperature lower than the temperature at which the thermally foamable refractory sheet 3 foams. As a material of the resin for the lower part 4 of the main body, in addition to the above-mentioned polypropylene, a polymer resin having a repeating unit such as polyethylene and polybutylene based on a monomer having 2 to 4 carbon atoms and having a softening temperature of 80 to 140 ° C. You can choose from things.
[0029]
【The invention's effect】
As described above, according to the present invention, even in a building ventilation system with good ventilation efficiency, it is possible to reliably shut off the ventilation path when fire flames, hot air, or the like is given. Moreover, if a resin member that melts at a temperature lower than the expansion start temperature of the heat-expandable refractory sheet is used in the lower part of the main body, the heat-expandable refractory sheet can be expanded and expanded uniformly, and the ventilation path can be more reliably blocked.
[0030]
[Brief description of the drawings]
FIG. 1 is a schematic side view showing a ridge ventilation device according to an embodiment of the present invention.
FIG. 2 is a main part side view showing the ridge ventilation device according to the embodiment of the present invention.
FIG. 3 is an exploded perspective view showing each component of the ridge ventilation device according to the embodiment of the present invention.
FIG. 4 is a perspective view of a main part of the ridge ventilation device according to the embodiment of the present invention.
FIG. 5 is a schematic side view showing the ridge ventilation device according to the embodiment of the present invention in a state where a ventilation passage of the ridge ventilation device is blocked.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 Upper body member 10 Ventilation gallery 11 Ventilation opening 12 Fin 2 Partition plate 21 Vent hole 22 Recess 3 Thermal foaming refractory sheet 4 Lower body 30 Ventilation passageway 50 Roof 51 Roof member

Claims (3)

In a ridge ventilation device provided in a ridge portion of a roof, a main body upper member having a ventilation gallery portion formed with a plurality of ventilation openings, and a portion disposed below the main body upper member and corresponding to at least the ventilation gallery portion A partition plate having a recess formed therein, a lower body member disposed below the partition plate for guiding rainwater or the like that has entered through the ventilation opening to a lower part of the eaves, a recess of the partition plate and an upper body member And a heat-foamable refractory sheet that expands when heated and blocks the ventilation opening of the ventilation gallery. The ridge ventilation device according to claim 1, wherein the lower body member is formed of a resin member that melts at a temperature lower than the expansion start temperature of the thermally foamable refractory sheet. 3. The ridge according to claim 2, wherein the resin member is a polymer resin having a repeating unit based on a monomer having 2 to 4 carbon atoms and having a softening temperature of 80 to 140 ° C. 4. Ventilation equipment.

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