JP5608476B2 - Attic ventilation structure and building of flat roof - Google Patents

Description

  The present invention relates to an attic ventilation structure of a land roof and a building having the attic ventilation structure.

  Conventionally, eaves are provided on the upper side of the ridge in a land-roofed building in consideration of ease of rain.

  This saddle portion also serves as a cosmetic material that covers the end of the roof surface of the land roof, and is provided with a ventilation opening for attic ventilation (see, for example, Patent Document 1).

JP 2000-328746 A

  In the conventional flat roof as described above, there is an opinion that the height of the parapet portion of the buttocks is so high that it is too conspicuous, and the design and aesthetic appearance of the building may be impaired.

  If these opinions are taken into account and the height of the parapet portion of the buttock is lowered and the buttock is made compact, the roof surface must be lowered in order to cover the edge of the roof surface.

  However, if the roof surface is lowered without securing the strength and heat insulation performance of the flat roof and further lowering the height of the indoor space below, the rafters supporting the roof member forming the roof surface and the heat insulating material below the rafter There is no gap between them, and ventilation is not possible in the direction perpendicular to the longitudinal direction of the rafters, and there is a problem that good attic ventilation can hardly be performed when the wind strength is weak or the wind direction is uneven. It will occur.

  Therefore, the present invention provides an attic ventilation structure of a land roof and a building equipped with the attic ventilation structure that can improve the design and aesthetics by making the heel part compact and can perform good attic ventilation. It is an object.

  In order to achieve the above object, an attic ventilation structure of a land roof according to the present invention is an attic ventilation structure of a building having a land roof, and a rafter supporting a roof member forming the roof surface of the land roof is in contact with a lower member. An attic space is formed, and a vent hole is provided so as to penetrate between both side surfaces on the long side of the rafter.

  Here, the vent hole may be a notch formed on the upper side or the lower side of the rafter, or a through hole formed at an intermediate position between the upper and lower sides of the rafter.

  In addition, a plurality of the vent holes are provided in the rafter, and a rectangular notch is formed as the notch in the vicinity of both longitudinal ends of the rafter, and an intermediate portion in the longitudinal direction of the rafter. It is preferable that a circular through hole is formed as the through hole.

  Furthermore, the lower member may be a heat insulating material.

  The building of this invention is equipped with the above-mentioned attic ventilation structure of a flat roof.

  Such an attic ventilation structure of a land roof of the present invention is an attic ventilation structure of a building having a land roof.

  And the rafter supporting the roof member forming the roof surface of the land roof is in contact with the lower member to form the attic space, and the vent hole is provided through the both sides of the long side of the rafter It is said that.

  With such a structure, the strength of the land roof is ensured, the height of the indoor space in the lower part is not lowered, the roof surface is lowered, and the rafter supporting the roof member forming the roof surface and the lower member below the rafter Even if there is no gap between them, air can be ventilated in the direction perpendicular to the longitudinal direction of the rafters from the ventilation hole, and good attic ventilation can be performed even when the wind strength is weak or the wind direction is uneven , The buttock can be made compact to improve the design aesthetics.

  Here, when the vent is a notch formed on the upper side or the lower side of the rafter, or a through hole formed at an intermediate position between the upper and lower sides of the rafter, using a tool such as a saw or a drill, Can be formed easily.

  In addition, a plurality of ventilation holes are provided in the rafter, a rectangular notch is formed as a notch in the vicinity of both ends in the longitudinal direction of the rafter, and a through hole is formed in the intermediate portion in the longitudinal direction of the rafter. In the case where circular through holes are formed, in the vicinity of both ends of the rafter, if a rectangular notch is formed elongated in the longitudinal direction of the rafter, a necessary ventilation area can be obtained and a large shear force can be obtained. A sufficiently large member cross section can be secured, and even if a circular through hole is formed with a necessary ventilation area in the middle part of the rafter, the force is structurally dispersed and a large bending moment can be withstood.

  Furthermore, when the lower member is a heat insulating material, not only the strength of the flat roof but also the heat insulating performance can be ensured.

  Such a building of the present invention is configured to have the above-described attic ventilation structure of a flat roof.

  Since it is such a structure, it can be set as the building which has an effect of the above-mentioned attic ventilation structure of a flat roof.

It is a perspective view which shows schematic structure of the building provided with the attic ventilation structure of the land roof of an Example. It is an AA arrow expanded sectional view in FIG. FIG. 3 is an enlarged sectional view taken along line B-B in FIG. 1. It is a side view of a rafter used in an example.

  DESCRIPTION OF EMBODIMENTS Hereinafter, modes for carrying out the present invention will be described based on examples shown in the drawings.

  First, the configuration of the embodiment will be described.

  FIG. 1: has shown schematic structure of the building 1 provided with the attic ventilation structure of the land roof of an Example.

  First, as shown in FIG. 1, this building 1 has a building body 1A built on a foundation 1B.

  Here, this building 1 has a flat roof 1C.

  In the attic ventilation structure of the flat roof of this embodiment, on the side having the eaves 2, as shown in FIG. 2, a receiving portion having a substantially W-shaped cross section is formed on the upper side surface of the upper flange portion 3 a of the ceiling beam 3 made of channel steel. The member 4 is fixed by bolts and nuts, and ends of the rafters 5,... Are installed on the upper surface of the receiving member 4 at substantially equal intervals in the longitudinal direction of the ceiling beam 3.

  And on the upper surface of the rafters 5,..., A plate-like roof base material 6 is affixed as a roof member. Further, on the surface of the roof base material 6, a folding plate as a roof finishing material is provided. 7 is attached to form a flat roof 1C.

  Moreover, the edge part of the field edge 8, ... is constructed in the longitudinal direction of the ceiling beam 3 at substantially equal intervals on the upper side surface of the lower flange part 3b of the ceiling beam 3 made of channel steel.

  And the ceiling surface material 9 is affixed on the lower surface of the field edge 8, ....

  Further, a heat insulating material 10 as a lower member is filled between the upper surface of the ceiling surface material 9 and the rafters 5.

  In addition, in order to ensure the required heat insulation performance, the heat insulating material 10 is filled up slightly above the lower ends of the rafters 5.

  Further, on the outer surface of the web portion 3c of the ceiling beam 3 of the channel steel, the arm member 11,... Is fixed in a substantially horizontal direction by bolts and nuts at substantially equal intervals in the longitudinal direction of the ceiling beam 3. ing.

  Further, a parapet 12 is fixed to the outer ends of the heel arm members 11.

  And the eaves eaves member 2a is attached between the lower surface near the edge part of the folding plate 7 as a roof finishing material, and the upper end part of the parapet 12, and the eaves eaves 2 are formed.

  Further, in order to further improve the waterproof property, a secondary rod member 20 a is attached to the upper portion of the rod arm members 11,..., And a secondary rod 20 is formed at the lower portion of the eaves rod 2.

  In addition, the edge part of the eaves 2 is connected with the vertical shaft not shown in figure, and enables the drainage of rain water.

  Further, an eaves panel 13 is attached to the lower surface of the eaves arm members 11.

  Here, a slight gap is provided between the lower end portion of the parapet 12 and the outer end portion of the eaves panel 13 to form a ventilation port 14.

  It should be noted that a bird-proof member 15 is provided at a location immediately after the ventilation port 14 enters to prevent a bird or the like from entering and forming a nest or the like.

  On the other hand, as shown in FIG. 3, on the side not having the eave ridge 2, the gap between the upper end portion of the parapet 12 and the roof base material 6 and the folding plate 7 as a roof member is not interposed. The main difference is that it is fixed directly.

  Here, as shown in FIG. 4, rectangular notches 5 a,... Are formed in the rafter 5 on the upper side in the vicinity of both ends of the rafter 5. The circular through holes 5b, ... are formed, and the notches 5a, ... and the through holes 5b, ... serve as ventilation holes for attic ventilation.

  And even when the strength of the wind is weak or the direction of the wind is uneven, as shown in FIGS. 2 and 3, the air for ventilation flows as shown by the arrow W, and good attic ventilation is provided. Done.

  It should be noted that the rafter 50 that supports the roof base material 6 on the upper side of the eaves arm members 11,. The through hole 5b is not formed.

  Next, functions and effects of the embodiment will be described.

  The attic ventilation structure of the land roof of such an example is the attic ventilation structure of the building 1 having the land roof 1C.

  And the roof base material 6 as a roof member which forms the roof surface of the land roof 1C and the rafters 5,... Supporting the folding plate 7 are in contact with the heat insulating material 10 as a lower member to form an attic space. In addition, the ventilation holes are provided by notches 5a,... And through holes 5b,.

  With such a configuration, the strength of the flat roof 1C is ensured, the height of the lower indoor space is not lowered, the roof surface is lowered, and the roof base material 6 and the folding plate 7 as the roof members forming the roof surface are supported. Even if there is no gap between the rafters 5,... And the heat insulating material 10 therebelow, the rafters 5,... From the vents formed by the notches 5a,.・ Ventilation is also possible in the direction perpendicular to the longitudinal direction, and good attic ventilation is possible even when the wind strength is weak or the direction of the wind is biased. Can be better.

  Here, the ventilation holes of the rafters 5,... Are notches 5a formed on the upper side of the rafters 5,. It is hole 5b, ....

  For this reason, an air hole can be easily formed using tools, such as a saw and a drill.

  Further, a plurality of ventilation holes are provided in each of the rafters 5, and rectangular cutouts 5 a,... Are formed in the vicinity of both ends in the longitudinal direction of the rafters 5. In the portion, circular through holes 5b,... Are formed.

  For this reason, in the vicinity of both ends of the rafter 5, if the rectangular cutouts 5a,... Are elongated in the longitudinal direction of the rafter 5, a necessary ventilation area can be obtained and a large shear force can be withstood. A large member cross section can be secured, and even in the middle part of the rafter 5, even if the circular through hole 5b is formed with a necessary ventilation area, the force is structurally dispersed and a large bending moment can be resisted.

  Further, the lower member is a heat insulating material 10.

  For this reason, not only the strength of the flat roof 1C but also the heat insulation performance can be ensured.

  The building 1 of such an example is configured to include the attic ventilation structure of the flat roof of the above-described example.

  Since it is such a structure, it can be set as the building which show | plays the effect of the attic ventilation structure of the above-mentioned land roof.

  As mentioned above, although the form for implementing this invention was explained in full detail based on the Example with reference to drawings, the concrete structure is not limited to this Example, and is a grade which does not deviate from the summary of this invention. Design changes are included in the present invention.

  For example, in the above-described embodiment, the heel portion is provided. However, the present invention is not limited to this, and the wing portion may be provided without a heel portion, and may be provided with a headboard capable of forming a ventilation opening.

  Moreover, in the above-mentioned Example, although implemented using the folding plate 7 as a roof finishing material, it is not limited to this, You may implement using a flat member etc. as a roof finishing material.

  Moreover, in the above-mentioned Example, although implemented using the heat insulating material 10 as a lower side member, it is not limited to this, You may implement via a humidity control material etc. as a lower side member.

  Further, in the above-described embodiment, the rectangular notches 5a,... And the circular through holes 5b,... Are formed as vent holes. If it does, you may implement in various shapes.

DESCRIPTION OF SYMBOLS 1 Building 1A Building main body 1B Foundation 1C Flat roof 2 eaves eaves 2a eave eaves member 20 Secondary eaves 20a Secondary eaves member 3 Ceiling beam 3a Upper flange part 3b of the ceiling beam Lower flange part 3c of the ceiling beam Web part 4 of the ceiling beam Receiving member 5 Rafter 50 Rafter 5a Notch 5b Through hole 6 Roof base material (roof member)
7 Origami (roof material)
8 Field edge 9 Ceiling surface material 10 Thermal insulation material (lower member)
11 庇 Arm member 12 Parapet 13 Eave panel 14 Ventilation opening 15 Birdproof member

Claims (7)

An attic ventilation structure of a building having a flat roof,
While the rafter supporting the roof member forming the roof surface of the land roof is in contact with the lower member, an attic space is formed,
A ventilation hole is provided through between the long side sides of the rafter,
The rafters are erected between the ceiling beams ,
A heel arm member is provided to be fixed substantially horizontally on the outer surface of the ceiling beam, and a parapet is fixed to the outer end of the heel arm member,
An eaves panel is affixed to the lower surface of the eaves arm member, and a ventilation port communicating with the attic space is formed between the outer end of the eaves panel and the lower end of the parapet. attic ventilation structure of a flat roof, characterized in that there.   2. The attic ventilation structure for a flat roof according to claim 1, wherein an end portion of the rafter is placed on an upper side surface of the ceiling beam.   A receiving member having a substantially W-shaped cross section is provided between an end portion of the rafter and the upper side surface of the ceiling beam, and a rising portion of the receiving member that is in contact with an end surface of the rafter is the roof member. The attic ventilation structure for a flat roof according to claim 2, wherein the attic is provided at a distance from the lower surface of the roof. The vent hole, the upper or lower formed side notches of the rafter, or any one of claims 1 to 3, wherein the a through hole formed in an intermediate position between the upper and lower rafters The attic ventilation structure of the flat roof described in 1. A plurality of the ventilation holes are provided in the rafter, and a rectangular cutout is formed as the cutout in the vicinity of both ends in the longitudinal direction of the rafter. The attic ventilation structure for a flat roof according to claim 4 , wherein a circular through hole is formed as the through hole. The attic ventilation structure for a flat roof according to any one of claims 1 to 5 , wherein the lower member is a heat insulating material. A building comprising the attic ventilation structure for a flat roof according to any one of claims 1 to 6 .