JP5341730B2 - Structure to prevent the spread of fire due to flying fire of roofing material made of synthetic resin - Google Patents

Description

  The present invention relates to a structure for preventing the spread of fire due to flying of a roofing material made of a synthetic resin attached to a roof of a factory, a warehouse, a garage, a bus stop or the like.

  In recent years, in factories and warehouses, a metal folding plate and a synthetic resin folding plate with daylighting properties are used together as a roofing material, and a roof that allows lighting through the synthetic resin folding plate is provided. Has increased. Also, in garages and bus stops, conventionally, a roof is often provided using a synthetic resin folded plate or corrugated plate.

  However, if a roofing material such as folded or corrugated sheet made of synthetic resin is attached to a part or the whole of the roof, there is a risk of burning the roofing material made of synthetic resin due to flying fire if a fire occurs nearby. there were.

Therefore, the present applicant has proposed the following roof structure as a roof structure with measures against flying fire.
That is, a roof structure in which a metal folded plate and a synthetic resin folded plate are attached to a main building material arranged with a space in the front and rear, and the main building before and after the portion where the synthetic resin folded plate is attached A pair of metal left and right receiving materials are mounted between the materials, a translucent incombustible plate is disposed between the left and right pair of receiving materials, and the left and right ends of the incombustible plate are placed between the left and right receiving materials. The roof structure supported by the lower end support part was proposed (Patent Document 1).

JP 2009-203665 A

  When the roof structure of the above-mentioned Patent Document 1 is used, even if a portion of the synthetic resin folded plate burned down burns and a hole is formed, a non-combustible plate on the lower side causes a spark to jump indoors from the open hole, Since it is possible to prevent the resin melted in the case of falling indoors, the fire resistance is improved and the danger is reduced.

  However, if a flying fire falls on the synthetic resin folded plate and starts to burn, an upward airflow is generated and the wind blows from the eaves side of the roof toward the ridge side, so the fire spreads from the location where the flying fire falls to the ridge side. There is a problem, and this fire spread cannot be prevented with the roof structure of Patent Document 1 described above. In particular, synthetic resin folded plates and corrugated sheets with alternating peaks and troughs are difficult to prevent the spread of fire because the wind tends to rise to the ridge side through the valleys. Therefore, an effective fire spread prevention measure is strongly desired.

  The present invention has been made under the above circumstances, and the problem to be solved is due to the flying of a roofing material in which crests and troughs such as synthetic resin folded plates and corrugated plates are alternately coupled. An object of the present invention is to provide a fire spread prevention structure capable of effectively preventing fire spread.

  In order to solve the above problems, the structure for preventing the spread of fire due to flying of a synthetic resin roofing material according to the present invention is a roofing material made of synthetic resin in which mountain parts and valley parts are alternately coupled, and a mountain part. Attaching both the incombustible roofing material in which valleys are alternately coupled to the roof frame, or a roof in which only the synthetic resin roofing material is attached to the roof frame, the synthetic resin An incombustible fire spread prevention member is installed on the upper surface side of the roofing material so as to cross the roofing material, and the incombustible fins of the fire spread prevention member are recessed between the peaks of the synthetic resin roofing material. The hollow portion is fitted into the hollow portion, and the concave hollow portion is closed with the fins of the fire spread prevention member leaving the bottom portion.

  In the fire spread prevention structure of the present invention, it is preferable that the fins of the fire spread prevention member are substantially suspended and fitted into the hollow space. And it is preferable to arrange | position a nonflammable surface material to the lower side of the said roofing material made from a synthetic resin, and to attach to the said roof frame.

  In the fire spread prevention structure of the present invention, even if the roofing material made of synthetic resin burns out by flying fire, the wind blown from the eaves side of the roof to the ridge side through the concave space between the mountain parts of the roofing material, Since the flame is largely blocked by the fins of the fire spread prevention member, the fire spreads from the fire spread prevention member to the ridge side can be prevented. Moreover, since this fire spread prevention member is nonflammable, there is no fear of burning and disappearing, and the above fire spread prevention action continues to be exhibited until the roofing material is extinguished. Further, in the fire spread prevention structure of the present invention, since the hollow portion between the peak portions of the roofing material is closed with the fins of the fire spread prevention member, leaving the bottom portion thereof, rainwater is blocked by the hollow portion. It passes through the bottom of the roof and flows down the valley of the roofing material and drains. Therefore, there is no worry that the drainage of rainwater is hindered by the fire spread prevention member.

  In particular, if the fins of the fire spread prevention member are substantially suspended and fitted in the recessed space between the roofing mountain peaks, the direction of the wind or flame that blows from the eaves side toward the ridge side is raised by the fins. Therefore, the effect of preventing the spread of fire is more significantly exhibited.

  Furthermore, if a non-combustible face material is placed on the lower side of the roofing material made of synthetic resin and attached to the roof frame, the roofing material made of synthetic resin is partially burned by a spark and a hole is opened. Even in such a case, it is possible to prevent a fire from jumping through the hole and a resin melted by heat from falling indoors, so that the fire resistance and safety are further improved.

It is a disassembled perspective view which shows the fire spread prevention structure by the flying fire of the roofing material which concerns on one Embodiment of this invention. It is sectional drawing of the same fire spread prevention structure. It is a perspective view which shows an example of the fire spread prevention member used for the same fire spread prevention structure. It is a front view of the fire spread prevention member attached to the roofing material. It is a disassembled perspective view which shows the test body of the spark test which employ | adopted the fire spread prevention structure of this invention. It is a top view which shows the spark test result (fire spread range) of the test body.

  The structure for preventing the spread of fire due to sparks of the roofing material according to the present invention is a roofing material made of synthetic resin in which peaks and valleys are alternately coupled, and noncombustibility in which peaks and valleys are alternately coupled. Applied to the roofing material made of synthetic resin in the roof where both the roofing material and the roofing material are attached to the roof frame, or the roof where only the synthetic resin roofing material is attached to the roof frame. It does not apply to non-flammable roofing materials that do not burn by flying fire.

  1 and 2 show a part of a roof to which a roofing material made of synthetic resin to which the fire spread prevention structure of the present invention is applied is attached. 1a, 1b, 1c, 1d are roof frames, A roofing material made of synthetic resin, 3 is a nonflammable fire prevention member, 4 is a nonflammable face material, 5 is a tight frame, 6 is a ridge face door, 7 is a parting face door, and 8 is a ridge wrap. The face material is used as a term representing a plate-like or sheet-like member.

  Specifically, the roof frames 1a, 1b, and 1c are a building material, a purlin material, and an eaves material made of H steel, respectively, and these building materials 1a, a main building material 1b, and an eaves material 1c are shown in FIG. As shown in FIG. 1, the roof skeleton is assembled by being supported by the palm material 1e. The roof frame 1d is a sheet metal face material support material that supports the face material 4. The face material support material 1d is bridged between the building material 1a, the main building material 1b, and the eaves material 1c. .

The roofing material 2 is a folded plate made of synthetic resin having daylighting properties in which peaks 2a and valleys 2b are alternately coupled, preferably a folded plate made of polycarbonate having excellent heat resistance and impact resistance. More preferably, a folded plate made of polycarbonate to which a flame retardant is added is used. The thickness of the roofing material 2 made of synthetic resin is not particularly limited, but is preferably 0.5 to 5 mm. This is because a material thinner than 0.5 mm cannot exhibit sufficient strength as a roofing material, and a material thicker than 5 mm increases in weight and wastes material.
This roofing material 2 has a tight frame 5 (mountains and valleys corresponding to the peaks 2a and valleys 2b of the roofing material 2 are alternately coupled) provided on the upper surfaces of the support frames 1a, 1b, 1c. A bolt that is placed on a sheet metal tight frame) and protrudes from the peak portion of the tight frame 5 is passed through the bolt insertion hole of the peak portion 2a of the roofing material 2 and is tightened with a nut, via the tight frame 5 It is attached to the support frames 1a, 1b, 1c.

  A nonflammable face material 4 is disposed below the roofing material 2 made of synthetic resin, and its four peripheral edges are attached to the support frames 1a, 1b, 1c, and 1d. When the synthetic resin roofing material 2 is partially burned by a spark, and the hole is opened, the surface material 4 may cause a spark to jump indoors or a resin melted by heat to fall indoors. For example, a nonflammable and daylighting face material such as a glass cloth, a glass plate, a metal cloth, a punching metal, and a wire mesh is used. In addition, what is necessary is just to select the attachment means of the face material 4 suitably according to the kind of face material 4. For example, when attaching a glass cloth, it is good to hold the four peripheral edges with a strip and to fix with a stopper.

  On the upper surface side of the roofing material 2 made of synthetic resin, the non-combustible fire spreading prevention member 3 which is a feature of the present invention is installed so as to cross the mountain part 2a and the valley part 2b of the roofing material 2 at right angles. The fins 3a of the fire spread prevention member 3 are fitted in the recessed portions 9 between the mountain portions 2a, 2a of the roofing material 2. This fire spread prevention member 3 is formed by punching a metal plate and bending it, so that a plurality of (three in this embodiment) fins 3a and a horizontally long upper fire prevention plate 3b are integrated as shown in FIGS. A mounting piece 3c that bends forward is formed between both ends of the upper fire protection plate 3b and between the fins 3a and 3a, and bends backward on both sides and the bottom of each fin 3a. A bent edge 3d is formed.

  The fins 3a of the fire spread prevention member 3 are formed in an inverted isosceles trapezoidal shape that is fitted into the recessed portion 9 between the peaks 2a and 2a of the roofing material 2 made of synthetic resin, as shown in FIG. In addition, the vertical dimension of the fin 3a is set to be slightly smaller than the depth dimension of the concave portion 9, and therefore, when the fire spread prevention member 3 is installed by fitting the fin 3a into the concave portion 9, the concave portion 9 is closed by the fins 3a, leaving the bottom 9a. Further, when the fin 3a is fitted into the hollow portion 9, the bent edges 3d and 3d on both sides of the fin 3a come into contact with the slopes of the peak portion 2a and the valley portion 2b of the roofing material 2 without any gaps. While the obstruction | occlusion property of the part 9 improves except the bottom part 9a, the installation stability of the fire-spreading prevention member 3 comes to improve. The bent edges 3d formed on both sides and the bottom of the fin 3a also serve to reinforce the fin 3a so that it does not deform.

  The bottom 9a of the hollow 9 that is not blocked by the fins 3a is opened to allow rainwater flowing down the valley 2b from the water upper side of the roofing material 2, so that rainwater stays in heavy rain. The size (open area) that can be passed through is sufficient, and if it is opened too much, the effect of preventing the spread of fire is reduced. Therefore, the vertical dimension of the fin 3a is set to about 9/10 to 6/10 of the depth dimension of the concave portion 9 (the dimension from the top of the peak 2a to the bottom of the valley 2b), and an appropriate open area It is preferable to form the bottom 9a. If the vertical dimension of the fin 3a is larger than 9/10 of the depth dimension of the recessed space 9, the open area of the bottom 9a of the recessed space 9 becomes too small, which may hinder the flow of rainwater during heavy rain. On the other hand, if it is smaller than 6/10, the open area of the bottom 9a of the hollow portion 9 becomes too large, and when the underwater side of the roofing material 2 is burned by a flying fire, the flame will blow the bottom 9a. Neither is desirable because it is easy to spread to the water side through. Moreover, it is preferable to set the height dimension of the upper fire protection plate 3b of the fire spread prevention member 3 to about 1/10 to 5/10 of the vertical dimension of the fin 3a. Fireproof performance can be demonstrated, and there is no worry of losing aesthetics. In addition, since the opening part of the bottom part 9a of the hollow part 9 should just open a part of bottom part, you may provide a hole like a punching metal.

  As shown in FIG. 4, the flame spread prevention member 3 is attached by fitting the fins 3 a into the concave portions 9 between the mountain portions 2 a of the roofing material 2, and the mounting pieces 3 c of the flame spread prevention member 3. A bolt 5a placed on the top of the peak portion 2a of the roofing material 2 and protruding from the peak portion of the tight frame 5 provided on the support frame 1b (the main building material) is used as a bolt at the top of the peak portion 2a of the roofing material 2. It is carried out by inserting the insertion hole and the bolt insertion hole of the attachment piece 3c of the fire spread prevention member 3 and fixing the attachment piece 3c and the top of the peak portion 2a of the roofing material 2 together with a nut 5b. .

  In addition, this fire spread prevention member 3 installs the fin 3a in the hollow part 9, installs it in the arbitrary parts of the roofing material 2, and attaches the attachment piece 3c to the top part of the peak part 2a of the roofing material 2 with a fastener. It may be attached by fixing, or when attaching the internal face door to the lower side of the roofing material 2 as described later, the attachment piece 3c and the internal face door are fastened together with a fastener and fixed. Also good. Moreover, the installation location of the fire spread prevention member 3 is not limited to one location in the middle of the roofing material 2, but a plurality of locations (for example, two locations on the underwater side and the middle portion of the roofing material 2 or the roofing material 2. You may attach to three places of a water lower side, an intermediate part, and a water upper side.

  The fins 3a of the fire spread prevention member 3 may be fitted into the recessed space 9 so as to be perpendicular to the roofing material 2, or the fins 3a may be suspended and fitted as shown in FIG. When the fire spread prevention member 3 is attached to the roofing material 2 in a vertical state by hanging the fins 3a and fitting into the hollow portions 9 as in the latter case, the underwater side (eave side) of the roofing material 2 is When the fire starts to fly, the direction of the wind and flame that blows from the underwater side (eave side) toward the upper side (building side) is smoothly moved upward by the fins 3a and the upper fire prevention plate 3b of the fire spread prevention member 3. Since it can be changed, there is an advantage that the fire spread preventing effect can be exhibited more remarkably.

  The fire spread prevention member 3 is manufactured by punching and bending a metal plate, but may be manufactured by molding a nonflammable inorganic material.

  As shown in FIGS. 1 and 2, a ridge face door 6 formed by punching a metal plate and bending it is attached to the upper surface side of the ridge side end portion of the roofing material 2. On the lower surface side of the eaves-end side end portion, a parting surface door 7 which is similarly punched and bent by a metal plate is attached. Then, on the upper side of the ridge side end portion of the roofing material 2, a ridge wrapper 8 obtained by bending a metal plate is provided. The ridge face door 6 and the parting face door 7 are attached to improve the beauty and prevent the invasion of wind and rain.

  At first glance, the ridge face door 6 resembles the fire spread prevention member 3, but the vertical dimension of the inverted two-sided trapezoidal face door portion 6 a is the same as the depth dimension of the hollow portion 9 of the roofing material 2. When the ridge face door 6 is attached by fitting the door portion 6a into the hollow portion 9, the hollow portion 9 is different from the fire spread prevention member 3 in that the hollow portion 9 is completely closed by the face door portion 6a. . Further, the band plate portion 6b connecting the face door portions 6a is bent rearward without standing like the upper fire prevention plate 3b of the fire spread prevention member 3, and is different from the fire spread prevention member 3 in that it does not play a role of fire prevention. Is.

  In addition, on the lower surface side of the intermediate part of the roofing material 2, an internal surface door having a shape in which the ridge surface door 6 is turned upside down may be attached. In addition, a water stop door (not shown) for preventing double entry of rainwater may be attached. And you may attach the makeup | decoration frame (not shown) for further improving the beauty | look to the eaves edge side front-end | tip of the roofing material 2. FIG.

  As shown in FIG. 2 with an arrow X, the roof that employs the above-described structure for preventing the spread of fire due to flying fire of the roofing material, even if the underwater side of the roofing material 2 made of synthetic resin burns out due to the flying fire. The wind blown from the eaves side of the roof to the ridge side through the hollow portion 9 between the mountain parts of the material 2 is turned upward by the fins 3a and the upper fire protection plate 3b of the fire spread prevention member 3, and the flame is prevented from spreading. Since it is substantially blocked by the fins 3a of the member 3 and the upper fire protection plate 3b, it is possible to prevent the fire spread from the fire spread prevention member 3 to the ridge side. In addition, since this fire spread prevention member 3 is formed by punching a nonflammable metal plate and bending it, there is no fear of burning and disappearing, and the above-mentioned fire spread prevention action continues to be exhibited until the roofing material 2 is extinguished. Moreover, since the bottom part 9a of the hollow part 9 between the peak parts of the roofing material 2 is not obstruct | occluded with the fin 3a of the fire spreading prevention member 3, rainwater passes through this bottom part 9a, and the trough part of the roofing material 2 It flows down 2b and is drained. Therefore, there is no concern that rainwater drainage is hindered by the fire spread prevention member 2. Further, since the nonflammable face material 4 is disposed below the roofing material 2 and is attached to the roof frames 1a, 1b, 1c, and 1d, the roofing material 2 made of synthetic resin is partially formed by flying fire. Even if a hole is opened due to burning, the face material 4 prevents flying fire from jumping into the hole or dropping the resin melted by heat into the room, further improving fire resistance and safety. Can be made.

In the above embodiment, the folded plate in which the angular peaks 2a and the angular valleys 2b are alternately coupled is used as the roofing material 2 made of synthetic resin. Of course, a corrugated plate in which a certain valley portion is alternately coupled may be used. In that case, it is a fire spread prevention member which has the fin of the shape corresponding to the hollow part between the crests with the round part of a corrugated board, Comprising: The vertical dimension of the fin is 9/10 of the depth dimension of a hollow part. What is necessary is just to attach the fire-spreading prevention member set to about ~ 6/10.
Further, in the above embodiment, the synthetic resin roofing material 2 is attached from the eaves to the ridge, but the synthetic resin roofing material 2 is attached to an intermediate portion between the eaves and the ridge. Of course, a roofing material such as a metal folded plate may be attached to the water side (ridge side) and the water side (eave side) of the material 2.

  Next, the effect confirmation test (flaming test) of the present invention will be described.

[Preparation of specimen]
A glass cloth was attached as a nonflammable face material 4 to the “day” -shaped frame 10 shown in FIG. 5, and the tight frames 5 and 5 were attached to the water upper side and the water lower side of the frame 10. Furthermore, as a roofing material 2 made of synthetic resin, a folded plate made of polycarbonate [manufactured by Takiron Co., Ltd., general grade Y500, transparent, thickness 1.5 mm, length 1870 mm, width 500 mm, peak from the bottom of the valley The height to the top of the part (the depth of the hollow part is 150 mm) is connected by connecting two in the width direction, and the above-mentioned metal plate is punched and bent at the middle part of the roofing material 2 The prevention member 3 was attached and the test body (1) was produced.
For comparison, a comparative test body (2) in which the fire spread prevention member 3 was removed from the test body (1) was also produced.
The fire spread prevention member 3 used for the above test body (1) has four inverted two-sided trapezoidal fins 3a corresponding to the concave hollow portions of the folded plate, and the vertical dimension of the fins 3a is 120 mm, The height of the upper fire protection plate 3b is 55 mm, and the installation position of the fire spread prevention member 3 is 935 mm from the water-side end of the roofing material 2 toward the water side.

[Test method]
The test body (1) was placed on the test body frame 12 with adjustable angle, and the gradient of the test body (1) was set to 15 °. Then, while blowing wind from the blower equipped with the wind tunnel to the test body (1) at a wind speed of 3 m / sec, the fire is made 500 mm from the underwater side end of the roofing material 2 of the test body (1). It installed in the trough part of the material 2, and the fire spread situation of the roofing material 2 by a fire type, the presence or absence of the through-hole (burn-out), etc. were observed.
Then, a spark test was also performed on the comparative specimen (2) under the same conditions.

[Test results]
The results of the above spark test were as shown in Table 1 below and FIG.

That is, it was found that the test body (1) to which the fire spread prevention member 3 is attached stays in the small fire spread range shown in A of FIG. 6 and can sufficiently prevent fire spread to the water side. On the other hand, it was found that the comparative specimen (2) in which the fire spread prevention member 3 is omitted has a large fire spread range as shown in FIG. 6B and cannot prevent the fire spread to the water side. From this, it was proved that the fire spread prevention member 3 is extremely effective in preventing the spread of the roofing material 2 to the water side due to flying fire.
Moreover, since both the test bodies (1) and (2) are provided with the nonflammable face material 4 on the lower side of the roofing material 2, no through hole (burnout) is formed, and this face material 4 It has been proved that it is possible to sufficiently prevent jumping into the indoors and dropping molten resin into the indoors.

  As confirmed by the above test results, the fire spread prevention structure of the present invention sufficiently prevents the spread of the roofing material made of synthetic resin due to flying fire, jumping into the room due to burnout (through hole) and molten resin This also has a remarkable effect that it can prevent fire fall and improve fire resistance and safety.

DESCRIPTION OF SYMBOLS 1a, 1b, 1c, 1d Roof frame 2 Roofing material made of synthetic resin 2a Mountain portion 2b Valley portion 3 Noncombustible fire spread prevention member 3a Fin 3b Upper fire protection plate 4 Nonflammable face material 9 Peak portion of roofing material Recessed space in between 11 Inside door

Claims (3)

  Attaching both a synthetic resin roofing material in which peaks and valleys are alternately coupled and a non-combustible roofing material in which peaks and valleys are alternately coupled to the roof frame, or In the roof where only the synthetic resin roofing material is attached to the roof frame, an incombustible fire spread prevention member is installed across the roofing material on the upper surface side of the synthetic resin roofing material, The non-combustible fin of the fire spread prevention member is fitted into the hollow space between the peaks of the synthetic resin roofing material, and the hollow space is closed with the fin of the fire spread prevention member leaving the bottom. A structure to prevent the spread of fire due to flying of a plastic roofing material.   2. The fire spread prevention structure according to claim 1, wherein the fins of the fire spread prevention member are substantially suspended and fitted into the concave hollow portion.   The fire spread prevention structure according to claim 1 or 2, wherein a non-combustible face material is disposed under the synthetic resin roofing material and attached to the roof frame.

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