JP2016188470A - Flat roof ventilation structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flat roof ventilation structure capable of easily ensuring reliable ventilation with the upper end of an outer wall positioned as close to the flat roof as possible.SOLUTION: The flat roof ventilation structure includes: a steel beam 2; a supporting metal 5 which is fixed to the steel beam 2 to support roof materials 11 and 12 of a flat roof 1; an outside air communication path 6 which is formed to pass through the supporting metal 5 above an outer wall panel 3; an outside air intake port 61 which is formed in a wall surface 31 upper than the top end of the outer wall panel 3; an attic space ventilation path 62 communicating with the outside air communication path 6 through an opening formed in the steel beam 2; and a refractory material 64 covering the steel beam 2 and the opening.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rooftop ventilation structure for taking outside air into the roof of a rooftop.

  Patent Document 1 discloses a ventilation device that ventilates indoors and outdoors of a building having a flat roof. This ventilation device is attached to the opening of the outer wall that partitions the building indoor and outdoor, and includes a hollow device main body whose internal space communicates indoors and a decorative cover that is attached to a position covering the outer wall side of the device main body. . The face on the outdoor side of the decorative cover is formed on a face that is substantially the same as the outer wall surface of the building.

  Patent Document 2 discloses a ventilation device. The ventilator includes a main body having a lip groove shape in cross section and a recess formed in the longitudinal direction, and a water return plate disposed in the main body along the longitudinal direction. A first ventilation port is formed in the concave portion of the main body portion so as to face the concave portion, and a second side along the longitudinal direction is formed on the side facing the back surface of the bottom portion of the concave portion between the first ventilation ports arranged opposite to each other. A vent is formed.

JP 2004-211956 A JP 2014-190080 gazette

  By the way, in a flat roof building, it is desirable to improve the aesthetics so that the upper end of the outer wall material is as close as possible to the flat roof. However, such a demand cannot be satisfied in the flat roof building having the conventional ventilation structure.

  In view of the above circumstances, an object of the present invention is to provide a rooftop ventilation structure that facilitates reliable ventilation while bringing the upper end of the outer wall material close to the rooftop as much as possible.

  In order to solve the above problems, the flat roof ventilation structure of the present invention is formed of a steel beam, a support metal fitting fixed to the steel beam and supporting the roof material of the flat roof, and the support metal fitting above the outer wall material. An outside air passage, an outside air inlet formed in a wall portion located above the upper end of the outer wall material, a hut back ventilation path that leads to the outside air passage through an opening formed in the steel beam, and It comprises a steel beam and a refractory material covering the opening.

  With the above configuration, since the outside air passage is formed by the support fitting above the outer wall material, it is easy to secure the outside air passage even if the upper end of the outer wall material is brought close to the location of the support fitting. It is. Therefore, it becomes easy to perform reliable ventilation while bringing the upper end of the outer wall material as close to the flat roof as possible. In addition, for example, even after fixing the roof material at the eaves in the construction work, it is possible to cover the refractory material on the outdoor side of the steel beam from the outdoor side using the outside air passage, It is not necessary to delay the work of fixing the roof material of the eaves for the coating work of the refractory material on the outdoor side of the steel beam, and the work becomes efficient.

  The roof material on the most end side of the land roof is thinner than the other roof materials, and the upper surface is substantially flush with the other roof material, so that a space portion is formed on the lower side, and the space portion is the above-mentioned You may make it comprise the upper part of an external air channel | path. According to this, even if the upper end of the outer wall material is brought as close as possible to the vicinity of the flat roof, it becomes easy to secure a required capacity in the outside air passage.

  The support metal fitting is provided with leg portions on the lower surface side at intervals in the extending direction of the steel beam, and the indoor side of the leg portion is fixed to the steel beam, via the indoor side portion. The other roof material is supported, a raised portion is provided on the outdoor side of the leg portion, and the endmost roof material may be placed on the raised portion.

  A ridge may be provided on the wall surface portion. Further, the outside air intake may be formed above the soot. Moreover, the eaves tip part may be formed above the said eaves, and the ventilator connected to the said external air intake may be provided between this eaves part and the said eaves. According to this, since the said ventilator and the eaves part are concealed by the said fence, the beauty | look of a building improves.

  If it is this invention, there exists an effect that it can ventilate reliably, bringing the upper end of an outer wall material close to the vicinity of a flat roof as much as possible.

It is general | schematic sectional drawing which showed the land roof ventilation structure which concerns on embodiment of this invention. It is the figure which showed the support metal fitting used with the flat roof ventilation structure of FIG. 1, Comprising: The figure (A) is a top view, The figure (B) is a front view, The figure (C) is a side view. FIGS. 1A and 1B are explanatory diagrams showing a roof material support structure and support metal fittings in the land roof ventilation structure of FIG. 1.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
As shown in FIG. 1, the flat roof ventilation structure according to this embodiment is applied to a steel building having a flat roof 1 and a steel beam (for example, H-shaped steel) 2 as a beam. The roof material 11 on the most end side (eave side) of the land roof 1 is thinner than the other roof material 12 on the water side, and the upper surface of the other roof material 12 is substantially flush with the other roof material 12. The roof materials 11 and 12 are made of, for example, ALC (Autoclaved Lightweight Concrete).

  The outer wall of the building is formed by the outer wall panel 3. The upper end of the outer wall panel 3 is located above the lower flange of the steel beam 2. However, the upper end of the outer wall panel 3 is located below the position of the upper flange of the steel beam 2, and the back surface of the outer wall panel 3 is separated from the outdoor side end of the flange of the steel beam 2. In the building, a ceiling 4 is formed below the lower flange of the steel beam 2.

  A support metal fitting 5 is fixed on the upper flange of the steel beam 2 by bolts 50. As shown in FIG. 2A, FIG. 2B, and FIG. 2C, the support fitting 5 includes a leg portion 51, a plate member 52, and a raised portion 53. Two legs 51 are provided at intervals in the extending direction of the steel beam 2. The leg 51 has a U-shaped cross section with bent pieces on both edges of the plate-like portion, and is provided with the plate-like portion on the lower side and the bent piece facing upward. Yes.

  The plate member 52 is formed long in the extending direction of the steel beam 2 and is stretched over the two leg portions 51. An ALC packing material is provided on the plate member 52.

  The raised portion 53 includes an indoor vertical portion 53a, two outdoor vertical portions 53b, and a horizontal plate portion 53c. The indoor vertical part 53 a is formed in a long shape in the extending direction of the steel beam 2, and the lower part thereof is connected to the leg part 51. The outdoor vertical portion 53b is formed to have the same width as the leg portion 51, and is provided from the outdoor side end of the leg portion 51 to the lower surface of the horizontal plate portion 53c. The lower portion is connected to the leg portion 51 and is connected to the plate portion 53c. The horizontal plate portion 53c is formed to be long in the extending direction of the steel beam 2 and protrudes to the outdoor side from the outdoor vertical portion 53b.

  As shown in FIGS. 3A and 3B, the indoor side portion of the leg 51 is fixed to the steel beam 2 by the bolt 50, and the other member is placed on the plate member 52. The roofing material 12 is supported. And the roof material 11 of the endmost side is supported by the raised part 53 located in the outdoor part of the leg part 51.

  A through hole 12 a is formed in the other roof material 12, and a lower end portion of the fastener 7 set in the through hole 12 a is engaged with the lower surface of the plate member 52, thereby the other roof material. 12 is fixed to the steel beam 2 through the support fitting 5. Further, the roof material 11 on the most end side is fastened to the horizontal plate portion 53 c in the raised portion 53 by screws 71.

  As shown in FIG. 1, an outside air passage 6 is formed by a space formed by the support fitting 5 from the upper end of the outer wall panel 3. An outside air inlet 61 communicating with the outside air passage 6 is formed in the wall surface portion 31 located above the upper end of the outside wall panel 3 and outside the outside surface of the outside wall panel 3. Further, the cabin back ventilation path 62 communicates with the outside air passage 6 through an opening formed in the web of the steel beam 2. A fireproof cylinder 63 made of a fireproof material is provided in the opening formed in the web. Moreover, the outdoor side and the indoor side of the steel beam 2 are covered with a sheet-like refractory material 64. Note that, on the lower side of the steel beam 2, the lower end side of the sheet-like refractory material 64 is brought to the glass wool side of the back surface of the outer wall panel 3. Further, on the upper side of the steel beam 2, the upper end side of the sheet-like refractory material 64 extends from between the leg portions 51, 51 to the lower surface side of the other roof material 12.

  And as above-mentioned, the space part 60 is because the said roof material 11 of the endmost side is thinner than the said other roof material 12, and the said other roof material 12 and an upper surface are provided substantially flush. Is formed. In other words, the space 60 is formed by the raised portion 53 of the support fitting 5. This space portion 60 constitutes the upper portion of the outside air passage 6.

  The wall surface portion 31 constituting the upper side of the upper end of the outer wall panel 3 is made of, for example, a calcium silicate plate serving as a base material. A nose cover plate is fixed so as to cover the wall portion 31, and an eaves 81 is attached to the nose cover plate. Further, the outside air intake 61 is formed at a position above the eaves bowl 81.

  Also, an eaves tip (drainer) 82 is attached above the eaves bowl 81. The eaves portion 82 includes a lower plate 82a, and the lower plate 82a forms a ventilation portion. A ventilation device 83 is provided between the lower side plate 82 a of the eaves tip 82 and the eaves 81. An upper surface portion of the ventilation device 83 communicates with the ventilation portion, and communicates with the outside air intake 61 through the ventilation portion. Although the said ventilator 83 has the same water return structure as the eaves ventilator disclosed by patent document 2 shown with the conventional steel, it is not limited to such a structure. The outside air taken in from the ventilator 83 reaches the hut ventilation path 62 from the fireproof cylinder 63 through the vent, the outside air inlet 61, the space 60 and the outside air passage 6.

  With the above configuration, the outside air passage 6 is formed so as to pass through the place where the support fitting 5 is disposed. Therefore, even if the upper end of the outer wall panel 3 is brought close to the place of the support fitting 5, the outside air passage 6 is provided. Is easy to secure. Therefore, it is possible to perform reliable ventilation while bringing the upper end of the outer wall panel 3 close to the flat roof 1 as much as possible. Further, for example, even after the most extreme roof material 11 is fixed by the construction work, the outdoor fire-resistant material 64 of the steel beam 2 is covered from the outdoor side using the outside air passage 6. Therefore, it is not necessary to delay the fixing work of the roof material 11 at the endmost side for the covering work of the refractory material 64 on the outdoor side of the steel beam 2, and the work becomes efficient.

  When the upper portion of the outside air passage 6 is formed by the space portion 60 formed by the roof material 11 on the most end side of the land roof 1 being thinner than the other roof materials 12, the upper end of the outer wall panel 3 is formed. Even if it is as close as possible to the flat roof 1, it becomes easy to secure a required capacity in the outside air passage 6.

  In addition, when the ventilation device 83 and the eaves part 82 are hidden by the eaves 81, the aesthetic appearance of the building is improved.

  In the above example, the support member 5 is formed as a long object by forming the plate member 52 long in the extending direction of the steel beam 2. However, the present invention is not limited thereto, and the support member 5 is not limited thereto. May be produced as a piece having a width dimension of the leg portion 51, for example. Moreover, although the said wall surface part 31 was comprised by the calcium-silicate board used as a base material, it may be comprised similarly to the said outer wall panel 3 not only in this.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

DESCRIPTION OF SYMBOLS 1 Land roof 11 Roof material 12 of the extreme end Other roof materials 2 Steel beam 3 Outer wall panel (outer wall material)
5 Support metal fittings 51 Leg part 52 Plate member 53 Raised part 6 Outside air passage 60 Space part 61 Outside air intake 62 Hut back ventilation path 63 Fireproof cylinder part 81 Eaves 82 Eaves part 83 Ventilator

Claims (6)

  A steel beam, a support bracket fixed to the steel beam and supporting the roofing material of the flat roof, an outside air passage formed by the support bracket on the upper side of the outer wall material, and located above the upper end of the outer wall material Characterized in that it comprises an outside air inlet formed in the wall surface part, a cabin back ventilation path that passes through the opening formed in the steel beam and communicates with the outside air passage, and a refractory material that covers the steel beam and the opening. The roof roof ventilation structure.   2. The flat roof ventilation structure according to claim 1, wherein the roof material on the most end side of the flat roof is thinner than the other roof materials, and the upper surface of the roof material is substantially flush with the space portion on the lower side. Is formed, and this space portion constitutes the upper side portion of the outside air passage.   3. The flat roof ventilation structure according to claim 2, wherein the support metal fitting has a leg portion on a lower surface side with an interval in an extending direction of the steel beam, and an indoor side of the leg portion is fixed to the steel beam. The other roof material is supported via the indoor side portion, and a raised portion is provided on the outdoor side of the leg portion, and the endmost roof material is provided on the raised portion. A flat roof ventilation structure characterized in that is placed.   The flat roof ventilation structure according to any one of claims 1 to 3, wherein a wall is provided with a ridge.   5. The flat roof ventilation structure according to claim 4, wherein the outside air intake is formed above the ridge.   6. The flat roof ventilation structure according to claim 4 or 5, wherein an eaves tip portion is formed above the eaves, and a ventilation device leading to the outside air inlet is provided between the eaves portion and the eaves. A flat roof ventilation structure characterized by being.

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