JP2010070958A - Fire-preventive construction of building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent fire on the periphery of a building from spreading into the building via an entrance porch. <P>SOLUTION: This fire-preventive construction of the building 1, in which the subsidiary roof 30A of the entrance porch 30 is connected to the front surface of the main roof 20A of the building 1, includes a fire-preventive surface 53A between the front surface of the main roof 20A and the subsidiary roof 30A. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a fire prevention structure for a building such as a unit building.

In a building such as a unit building, as described in Patent Document 1, there is one in which an incidental roof of an entrance porch is connected to the front surface of a main body roof of a building.
Patent 3176466

  In the prior art, when a fire generated around a building ignites the entrance porch, there is a risk of spreading from the incidental roof of the entrance porch to the inside of the building through the front surface of the main body roof and the back of the hut.

  An object of the present invention is to prevent a fire around a building from spreading to the inside of the building through an entrance porch.

  The invention according to claim 1 is a fire prevention structure of a building in which an incidental roof of an entrance porch is connected to the front surface of the main body roof of the building, and a fire prevention surface is provided at a connection portion between the front surface of the main body roof and the incidental roof. It is a thing.

  According to a second aspect of the present invention, in addition to the first aspect of the present invention, a part of the fireproof surface is a vent and a fire damper is provided to close the vent when a fire occurs.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the main body roof is further provided with subparts for connecting the roof surface of the auxiliary roof to the roof surface of the main body roof. .

(Claim 1)
(a) When a fire in the vicinity of a building ignites the entrance porch, the spread of fire from the incidental roof of the entrance porch to the front of the main unit roof is prevented by the presence of a fire-proof surface, and as a result, to the back of the main unit roof and inside the building The spread of fire is prevented.

(Claim 2)
(b) Since a part of the fire prevention surface is used as a ventilation opening, the main body is usually provided through a large opening ventilation opening that is provided in front of the main roof covered with an incidental roof and does not enter rainwater. Ventilate the roof of the roof.

  When a fire breaks out, a fire damper closes the above vent and prevents the fire from spreading into the back of the roof of the main roof through this vent.

(Claim 3)
(c) The main body roof is provided with sub-parts that connect the roof surface of the incidental roof to the roof surface of the main body roof. Therefore, while ensuring the degree of freedom of the roof shapes of the main body roof and the incidental roof, it is possible to form a housing in which the main body roof and the incidental roof are harmonized by the interposition of the sub-parts in the entire roof of the building.

  1 is a schematic perspective view showing a building, FIG. 2 is a sectional view showing an entrance porch provided in the building, FIG. 3 is an enlarged view of a part III in FIG. 2, and FIG. 4 is a fire prevention structure provided in front of the main roof of the building. 5 is an exploded perspective view, FIG. 5 shows a fire damper, (A) is a front view, and (B) is a cross-sectional view.

  A building 1 shown in FIG. 1 is a unit building constructed on a foundation 2, a plurality of building units 10 are arranged adjacent to each other, and a main body roof unit 20 is mounted on each building unit 10. 20 forms a gable body roof 20A.

  The building unit 10 is provided with a fireproof wall material 12 pasted on the outer surface of the wall frame 11. The main body roof unit 20 is provided with a fireproof roofing material 22 laid on a roof frame 21. On the upper frame member 11A of the wall frame 11 of the building unit 10, the lower frame member 21A of the roof frame 21 of the main body roof unit 20 is bolted.

  An entrance porch 30 is provided in front of the building 1. As shown in FIG. 2, the entrance porch 30 is provided on the front wall of the building unit 10 and the steel beam 32 spanning the upper ends of the two pillars 31, 31 on the eaves receiving member. A roof frame 33 composed of 33A, a triangular truss 33B, and the like is supported, and a fireproof roof surface material 34 is laid on the roof frame 33 to form a gable incidental roof 30A.

  The building 1 connects the incidental roof 30A of the entrance porch 30 to the front surface of the main body roof 20A. That is, the triangular truss 33B of the roof frame 33 of the entrance porch 30 is installed on the front surface of the lower frame member 21A and the outer peripheral frame member 21B of the roof frame member 21 of the main body roof unit 20.

  In the building 1, the gable ridge of the main body roof 20A and the gable ridge of the incidental roof 30A are arranged orthogonal to each other. Then, a pair of left and right subparts 40 that connect the roof surface (roof surface material 34) of the incidental roof 30A to the roof surface (roof surface material 22) of the main body roof 20A is provided on the main body roof 20A. As shown in FIGS. 2 and 4, the sub-part 40 includes two roof frames 41 on the left and right sides. A fireproof roof surface material 42 is laid on the roof frame 41 to form a gable sub-roof 40 </ b> A. The sub roof 40A forms a triangular roof surface (roof surface material 42) on both sides of the ridge of the sub roof 40A. The roof surface (roof surface material 42) of the sub roof 40A is flush with the roof surface (roof surface material 34) of the incidental roof 30A and extends from the incidental roof 30A side to the main body roof 20A side. It hits the roof surface (roof surface material 22) of 20A.

  However, in the building 1, in order to prevent the spread of fire, the following fire prevention structure is provided at the connection portion between the front surface of the main body roof 20 </ b> A and the incidental roof 30 </ b> A.

  As shown in FIG. 4, the building 1 has an OSB (on the front side of the lower frame member 21 </ b> A and the outer peripheral frame member 21 </ b> B of the roof frame 21 of the main unit roof unit 20 and the roof frame 41 of the sub-part 40 on the front side of the main unit roof 20 </ b> A. An acrylic steel plate 53 is pasted through an oriented strand board) 51 and a trunk edge 52. A drainer 54 is provided below the acrylic steel plate 53 from the front surface of the main body roof 20A to the outside of the wall surface material 12 of the building unit 10. Here, the acrylic steel plate 53 constitutes a fireproof surface 53A provided at a connection portion between the front surface of the main body roof 20A and the incidental roof 30A.

  As shown in FIGS. 3 and 4, the building 1 is provided with a notch 61 </ b> A that forms a ventilation port 60 at each of a plurality of positions along the longitudinal direction of the outer peripheral frame member 21 </ b> B of the roof frame assembly 21 of the main body roof unit 20. Notches 61B, 61C, and 61D that form ventilation openings 60 are also provided in the OSB 51, the trunk edge 52, and the acrylic steel plate 53 that are attached to the outer peripheral frame member 21B of the roof frame 21. The ventilation opening 60 opens in the attic of the incidental roof 30A of the entrance porch 30, and allows ventilation (indicated by arrows in FIG. 3) between the attic of the main roof 20A and the attic of the auxiliary roof 30A, and ventilates the attic of the main roof 20A. .

  The building 1 is provided with a fire-proof damper 70 that closes the ventilation opening 60 in the event of a fire. The fireproof damper 70 is installed in the notch 61D (ventilation opening 60) of the acrylic steel plate 53.

  As shown in FIG. 5, the fire damper 70 includes a base plate 71 and a cover plate 72, which are made of steel plates, bonded together by spot welding or the like, and openings 71 </ b> A and 72 </ b> A corresponding to the notches 61 </ b> D (ventilation ports 60) of the acrylic steel plate 53. Provided in the base plate 71 and the cover plate 72, and a shutter 73 is accommodated in the gap formed between the base plate 71 and the cover plate 72 and above the openings 71A and 72A, and is secured to the outer surface of the base plate 71. The bent end stopper portion 74A of the shape memory alloy stopper 74 is locked to the lower edge of the shutter 73 described above. When the fire damper 70 is attached with the cover plate 72 attached to the front surface of the acrylic steel plate 53, the openings 71A and 72A of the base plate 71 and the cover plate 72 are aligned with the notches 61D (ventilation ports 60) of the acrylic steel plate 53. . Normally, the tip stopper portion 74A of the stopper 74 has the above-described bent shape, the shutter 73 is held above the openings 71A and 72A, and the notch 61D (ventilation port 60) of the acrylic steel plate 53 is placed in the openings 71A and 72A. To release.

  When a fire breaks out and the stopper 74 is exposed to a high temperature, the tip stopper portion 74A of the stopper 74 is restored to a linear memory shape and is unlocked from the shutter 73, and the shutter 73 falls due to its own weight. Then, the openings 71A and 72A of the base plate 71 and the cover plate 72 are closed, and the notch 61D (ventilation port 60) of the acrylic steel plate 53 is closed. Thereby, the fire spread through the ventilation opening 60 is prevented.

Therefore, according to the present embodiment, the following operational effects can be obtained.
(a) When a fire generated around the building 1 ignites the entrance porch 30, the spread of fire from the incidental roof 30A of the entrance porch 30 to the front surface of the main body roof 20A is prevented by the presence of the fire prevention surface 53A. The spread of fire to the back of the shed and building 1 is prevented.

  (b) Since a part of the fireproof surface 53A is used as the ventilation opening 60, it is usually provided on the front surface of the main body roof 20A covered with the incidental roof 30A and has a large opening without intrusion of rainwater. The roof of the main body roof 20A can be ventilated through the.

  When a fire occurs, the fire-proof damper 70 closes the above-described vent 60 and prevents the fire from spreading into the back of the main roof 20A from the vent 60.

  (c) The main body roof 20A is provided with a sub-part 40 that connects the roof surface of the incidental roof 30A to the roof surface of the main body roof 20A. Therefore, while ensuring the flexibility of the roof shapes of the main body roof 20A and the incidental roof 30A, the entire roof of the building 1 forms a package in which the main body roof 20A and the incidental roof 30A are harmonized by the interposition of the subparts 40. it can.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and even if there is a design change or the like without departing from the gist of the present invention. It is included in the present invention.

FIG. 1 is a schematic perspective view showing a building. FIG. 2 is a cross-sectional view showing an entrance porch provided in a building. FIG. 3 is an enlarged view of part III in FIG. FIG. 4 is an exploded perspective view showing a fire prevention structure provided on the front surface of the main roof of the building. FIG. 5 shows a fireproof damper, (A) is a front view, and (B) is a sectional view.

Explanation of symbols

1 Building 20A Main body roof 30 Entrance porch 30A Attached roof 40 Subpart 53A Fireproof surface 60 Ventilation opening 70 Fireproof damper

Claims (3)

A fire prevention structure of a building in which an incidental roof of an entrance porch is connected to the front of the main body roof of the building,
A fire prevention structure for a building in which a fire prevention surface is provided at the connection between the front surface of the main roof and the incidental roof.   The fireproof structure for a building according to claim 1, wherein a part of the fireproof surface is a vent and a fire damper is provided to close the vent when a fire occurs.   The fire prevention structure for a building according to claim 1 or 2, wherein the main body roof is provided with subparts that connect the roof surface of the incidental roof to the roof surface of the main body roof.

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