JP3583917B2 - Fire protection structure - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to, for example, a fire-prevention measure structure of a penetrating portion penetrated on a floor or a wall of a building and penetrating a communication cable or the like.
[0002]
[Prior art]
In a building such as a factory or a building, a through hole is formed in a fire protection compartment such as a floor or a wall, and a long body such as a cable or a resin pipe is arranged in the through hole.
In this case, from the viewpoint of preventing the spread of fire in a fire, it is mandatory to take measures such as backfilling the gap between the through-hole and the long body with fire-resistant material and having a fire protection performance of 2 hours in accordance with the Building Standards Law. Have been.
[0003]
Conventionally, there are various types of fire-prevention measures structures for such fire-prevention compartments. The main one is shown in FIG.
In the construction method using the structure shown in FIG. 33, for example, a rock wool 4 is packed around a communication cable 3 as an elongated body that penetrates through the opening 2 of the floor fire protection compartment 1, and the upper surface of the floor fire protection compartment 1 And lids 5 and 5 made of a refractory plate such as calcium silicate on the lower surface. After that, the upper and lower lids 5 and 5 are fixed to the floor fire protection compartment 1 with the anchor bolts 6 and 6, and the refractory putties 7 and 7 are packed and fixed in the gap between the cable 3 and the lids 5 and 5.
[0004]
[Problems to be solved by the invention]
However, in the conventional fire protection structure, when the communication cable 3 penetrating through the floor fire protection partition 1 is replaced or expanded, the rock wool 4, the lids 5, 5, the refractory patties 7, 7 are required. It is necessary to remove all the fire prevention measures members, such as, and it was troublesome.
[0005]
Moreover, the replacement work usually takes several days to several weeks, during which time the fire prevention member is removed and left open.
Therefore, when a fire occurs in this state, there is a risk that fire and smoke will blow out from the opening 2 of the floor fire protection compartment 1 and spread.
[0006]
Also, when a large number of cables such as communication cables are bundled and wired through, or when power cables with thick conductors are wired through, the amount of heat supplied to the non-fire side via the conductor is extremely small. Because of this, the usual filler such as the rock wool 4 and the refractory putty 7 cannot suppress the heat conduction, and there is a risk that the non-fire side becomes hot and the fire spreads.
[0007]
The present invention has been made in view of the above-mentioned circumstances, and when replacing or extending a long body such as a cable, fire prevention measures are easily and quickly applied again to the opening after dismantling of the fire protection structure. It is an object of the present invention to provide a fire-prevention measure structure capable of performing a fire-prevention measure having a high fire resistance with a simple structure and construction even in a portion where a large amount of cables can be penetrated and wired.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 provides a fire protection compartment having an opening penetrating a long body, and an opening provided on the fire protection compartment so that both surfaces communicate with the opening. A fire-resistant frame that has an internal space and penetrates the elongated body, and a fire-resistant shield that is provided so as to close both sides of the frame and shields the opening; A notch is formed in the shielding body, and a notch portion through which the elongate body is inserted with a gap of a predetermined size between the elongate body and an outer peripheral surface thereof, and the inner space of the frame body is removably filled to fill the inner space. A plurality of refractory fillers having elasticity for sealing, and a thermal expansion interposed between the refractory fillers and the shield to shield a gap between an outer peripheral surface of the long body and the notch. Material.
[0009]
The invention according to claim 2 has a fire protection compartment having an opening through which the elongated body penetrates , and has an internal space provided on the fire protection compartment, both sides of which are open to communicate with the opening. A fire-resistant frame that penetrates the elongated body, a fire-resistant shield that shields the inner bottom of the opening of the fire protection compartment , and a notch formed in the shield, and the elongated body has an outer periphery A cut-out portion to be inserted with a gap of a predetermined dimension between the surface and a plurality of refractory fillers having elasticity that are removably filled into an opening of the fire-prevention compartment and seal the opening . A thermal expansion material is interposed between the refractory filler and the shield, and shields a gap between the outer peripheral surface of the long body and the notch .
[0010]
According to a third aspect of the present invention, there is provided a fire protection compartment having an opening through which the elongated body penetrates, and an inner space provided on the fire protection compartment and having both sides open so as to communicate with the opening. A fire-resistant frame that penetrates the elongated body, a fire-resistant shield that is provided so as to close both sides of the frame, and that shields the opening, and a cutout formed in the shield, A cutout portion through which the elongated body is inserted with a predetermined gap between the outer body and the outer peripheral surface thereof, and a plurality of elastic members which are removably filled in the internal space of the frame body to seal the internal space . A refractory filler, and a thermal expansion material interposed between the refractory filler and the shield, and shielding a gap between the outer peripheral surface of the long body and the notch , Refractory filler material absorbs heat from the heat-expanding material that expands when heated, deformable soft material, and surrounding heat. Among the endothermic material, a composite consisting of at least two or more thereof, the complex is characterized by being wrapped in a state of being integrated by the flame-retardant or incombustible sheet material.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described with reference to an embodiment shown in FIGS.
FIG. 1 is a cross-sectional view showing a fire protection structure according to the present invention, and FIG. 2 is a partially cutaway plan view.
[0012]
In the figure, reference numeral 11 denotes a floor as a fire protection compartment, and an opening 12 is formed in the floor 11. Through this opening 12, an FRPE cable 15a, an optical fiber cable 15b, a cable 15c in a PVC office, and a cable rack 15d (hereinafter, referred to as a cable 15) as long bodies are penetrated. A frame 14 is provided on the floor 11 so as to surround the opening 12, and the frame 14 is fixed to the floor 11 by fixing brackets 17 a and anchor bolts 17 b.
[0013]
A lower shielding plate 13 is arranged at the inner bottom of the frame 14 so as to close the opening 12, and an upper shielding plate 20 is arranged at the upper end of the frame 14. The upper shielding plate 20 is fixed to the frame body 14 by fixing brackets 17c. The frame 14 and the shielding plates 13 and 20 are formed of a calcium silicate plate or the like having excellent fire resistance, and the shielding plates 13 and 20 are formed with cutout portions 16a and 16b through which the cable 15 is inserted. These notches 16a and 16b are notched so as to have a gap S of at least 50 mm or more from the outer periphery of the cable 15 in consideration of a future wiring space.
[0014]
The refractory fillers 18 are inserted into the frame body 14 in a slightly pressed state. Between the refractory fillers 18 and the lower shield plate 13, for example, a heat seal such as a Danseal D The expansion material sheet 19a is interposed. There are variations of large, medium, and small refractory sponges A, B, and C in the refractory fillers 18. The combination of these refractory sponges A, B, and C fills the frame 14 without gaps. . The refractory sponges A, B, and C are closely adhered to each other within the frame body 14 by the repulsive force of each other.
[0015]
Further, a heat-resistant sealing material 19b is interposed between the upper surface of the floor 11 and the lower surfaces of the frame body 14 and the lower shielding plate 13.
3 to 8 show a procedure for replacing the cable 15 and the like, and performing an extension work.
[0016]
In this case, first, as shown in FIGS. 3 and 4, the upper shield plate 20 is removed, and then the fire-resistant filler 18... Of the portion to be replaced and added is pulled out. Next, as shown in FIGS. 5 and 6, the cable 15 is exchanged (or added), and then, as shown in FIGS. Fill and seal.
[0017]
In this way, after the replacement and extension work of the cable 15 is completed, if necessary, the fire-resistant fillers 18 (large / medium / small fire-resistant sponges A, B, C) are combined to close the remaining gap and recover. Construction is completed.
[0018]
In addition, since a gap S of about 50 mm is provided in advance between the lower shielding plate 13 and the cable 15 or the like, the lower shielding plate 13 is taken out and newly cut out if the extension is within the range of this size. No need.
[0019]
Therefore, it is possible to release / recover the fire prevention measures extremely easily and within a short time.
FIG. 9 is a perspective view showing the refractory filler 18.
[0020]
The refractory filler 18 is a composite of a combination of a thermal expansion material 21 that expands when heated, a deformable flexible block material 22, and a heat absorbing material 23 that absorbs surrounding heat. Alternatively, it is wrapped in an integrated state by a non-combustible sheet 24.
[0021]
The thermal expansion material 21 is a material that expands in volume by receiving heat at the time of heating, and for example, a sheet such as “Danseal D” (trade name: manufactured by Furukawa Electric Co., Ltd.) may be used. This Dansyl D is a rubber sheet-like composition that has not expanded before heating, and has a relatively large heat capacity and a high density.
[0022]
Accordingly, during heating, the volume expands while generating a pressing force, and after the expansion, it changes into a carbonized product having a high heat insulating property, so that the heat insulating effect is high.
Other than the above, examples of the thermal expansion material 21 include “Heat Melpate” (trade name: manufactured by Furukawa Electric Co., Ltd.), “Fomox” (trade name: manufactured by Bayer AG, West Germany), and “Fire Barrier” (trade name: 3M USA) Manufactured) can be used.
[0023]
The flexible block material 22 can satisfy the required function by any sponge-like block body represented by foamable polyethylene, foamed rubber, or the like. In order to maintain elasticity, a material that is unlikely to cause elastic creep is optimal.
[0024]
The heat absorbing material 23 is for absorbing and preventing the heat on the fire side from being supplied to the anti-fire side via a conductor such as a cable, and there is no heat conductor such as a cable directly in the vicinity. In this case, there is an effect of preventing weight loss or falling off of the refractory filler 18 itself and surrounding members due to heat, and exerts an effect of extending the fire resistance performance time of the present fire prevention measure structure.
[0025]
The composition is a composition to which a heat-absorbing component such as aluminum hydroxide is added. For example, a composition having flexibility such as flame-retardant foamed polyethylene or foamed rubber to which aluminum hydroxide is added may be used.
[0026]
In order to more positively expect the effect of absorbing heat, a swollen water-absorbing polymer or the like is effective. For example, “Proteco Pack” (trade name: Furukawa Electric Co., Ltd.) enclosed in an aluminum pack Manufactured).
[0027]
The flame-retardant or non-flammable sheet 24 is made of glass fiber, carbon fiber fabric, or the like, and integrates the above-mentioned components, and also prevents the refractory filler 18 from being deformed or damaged.
[0028]
The fire-resistant filler 18 of the present invention has the effect shown in FIG. 10 in a fire.
Normally, when only the flexible block material represented by foamed polyethylene or the like is filled in the frame 14 as a fire-resistant filler, even if the flexible block material itself has flame retardancy, Even if it is included in the heat-resistant sheet 24 or the like and provided with fire resistance, the fire-resistant filler itself loses its weight with time if exposed to heating for 2 hours or more required as the fire resistance performance time of the section penetration part. It may shrink and eventually create a gap through which the flame passes.
[0029]
Also, even if it is provided with a considerable fire resistance that can withstand heating for more than 2 hours, a large number of cables such as communication cables are bundled and penetrated, or a power cable with a thick conductor is penetrated. In such a case, the amount of heat supplied to the anti-fire side via the conductor becomes extremely large, so that heat conduction cannot be suppressed as in the case of ordinary fillers such as rock wool and fire-resistant putty, and the anti-fire side becomes hot. There is a risk of spreading the fire.
[0030]
However, in the refractory filler 18 according to the present invention, even if the flexible block material 22 itself is reduced or contracted, the existing thermal expansion material 21 expands at the same time, and the refractory filler 18... There is no gap between them.
[0031]
At the same time, the heat absorbing material 23 has the effect of absorbing the heat of a heat conductor such as a cable and preventing the weight and dropout of the refractory filler 18 itself and the surrounding members due to the heat. It has the effect of extending the fire resistance performance time.
[0032]
FIG. 11 is a perspective view showing a refractory filler 30 according to a first other embodiment. In this embodiment, a thermal expansion material 21 is sandwiched between a flexible block material 22 and a heat absorbing material 23. A complex is formed in the state.
[0033]
The refractory filler 30 is designed so that the heat-absorbing material 23 side can be specified and arranged toward the cable 15 or the like which easily conducts heat. It is.
[0034]
FIG. 12 is a perspective view showing a refractory filler 31 according to a second alternative embodiment. In this embodiment, when the fire side can be specified by a floor penetration or the like, the thermal expansion material 21 is replaced with a flexible block material. It is arranged only on the lower half side, not on the entire surface of the heat absorbing material 22 and the heat absorbing material 23.
[0035]
FIG. 13 is a perspective view showing a refractory filler 32 according to a third embodiment. In this embodiment, a thermal expansion material 21 and a heat absorbing material 23 are formed by two or more flexible block materials 22. It is included in a sandwich-like state to form a composite, which is effective in securing more flexibility.
[0036]
FIG. 14 is a perspective view showing a refractory filler 33 according to a fourth other embodiment. In this embodiment, two or more heat-expanding members 21 and heat-absorbing members 23 are arranged vertically. The composite is formed by being included in a state sandwiched by the flexible block members 22 in a sandwich shape.
[0037]
FIG. 15 is a perspective view showing a refractory filler 34 according to a fifth embodiment. In this embodiment, a thermal expansion material 21 is sandwiched between two or more flexible block materials 22. It is encapsulated in a wrapped state to form a composite, and can be used relatively inexpensively in a small number of cables having a small amount of heat conduction or a power cable having a small conductor.
[0038]
FIG. 16 is a perspective view showing a refractory filler 35 according to another embodiment of the present invention. In this embodiment, the thermal expansion material 21 is provided only on the lower half side between two flexible block members 22. To form a complex.
[0039]
FIG. 17 is a perspective view showing a refractory filler 36 according to a seventh embodiment. In this embodiment, the heat absorbing material 23 itself is formed into a deformable flexible block, and the flexible block material 22 is used. This gives flexibility to the composite without being used together, and the thermal expansion material 21 is included in a state sandwiched by two or more flexible heat absorbing block members 23 in a sandwich shape.
[0040]
FIG. 18 is a perspective view showing a refractory filler 37 according to an eighth embodiment of the present invention. In this embodiment, the thermal expansion material 21 is placed not on the entire surface between the heat absorbing materials 23 but on the lower half side. Only provided for.
[0041]
FIG. 19 is a perspective view showing a refractory filler 38 according to another embodiment of the ninth embodiment. In this embodiment, the flexible block member 22 (or the heat absorbing member 23) includes two or more thermal expansion members. The composite is formed by being included in a sandwiched state by the composite material 21, and is effective when it is desired to further obtain the expansion effect of the thermal expansion material 21.
[0042]
FIG. 20 is a perspective view showing a refractory filler 39 according to a tenth embodiment. In this embodiment, one side is a thermal expansion material 21 and the other is a flexible block material 22 (or a heat absorbing material). 23), which is a fire-resistant filler having a simple structure that can be used for a part that does not require relatively severe fire resistance and is composed of only two members.
[0043]
FIG. 21 is a perspective view showing a refractory filler 40 according to another embodiment of the present invention. This refractory filler 40 is used when it is desired to obtain the expansion effect of the thermal expansion material 21 in a shorter time. That is, the heat conductor 41 made of metal foil such as aluminum is arranged in advance in a part of the composite.
[0044]
FIG. 22 is a perspective view showing a refractory filler 42 according to another embodiment of the twelfth embodiment. In this embodiment, the thermal expansion material 21 is not provided on the entire surface but only on the lower half side, and a metal such as aluminum is used. The heat conductor 41 made of a foil is arranged in advance in a part of the composite.
[0045]
FIG. 23 and FIG. 24 show a fire prevention structure according to a second embodiment of the present invention. In this embodiment, the shielding plate 51 is fixed to the floor 11 with anchor bolts 52, and a frame 53 is provided on the shielding plate 51.
[0046]
FIG. 25 to FIG. 27 show a fire protection structure according to a third embodiment of the present invention. In this embodiment, three communication cables 62 are inserted in the opening 61 formed in the floor 11 at predetermined intervals in the longitudinal direction. Upper and lower shields 63 and 64 for shielding the opening 61 are attached to the lower surface and the upper surface of the floor 11. The upper and lower shields 63, 64 are respectively composed of a plurality of divided pieces 63a, 64a, and the plurality of divided pieces 63a, 64a are fixed by hanging bolts 65, respectively. The upper and lower divided pieces 63a, 64a are formed with cutouts 63b, 64b through which the communication cables 62 are inserted. The inside of the opening 61 is filled with large, medium, and small refractory sponges A, B, and C, which are the refractory filler 18, and the opening 61 is closed. A heat-expandable refractory sheet 67 is interposed between the large, medium, and small refractory sponges A, B, and C and the shield 64.
[0047]
28 to 30 show a fire protection structure according to a fourth embodiment of the present invention. FIG. 28 is a plan view, FIG. 29 is a sectional view thereof, and FIG. 30 is a front view showing a cable.
[0048]
In this embodiment, after the cable 15 is disposed along the floor 11, the cable 15 is inserted into the opening 73 on the side surface of the frame 72, and then bent downward to form the opening 12 on the floor 11. It is inserted inside. The inside of the opening 12 on the floor 11 is shielded by a shield 74, and a notch 75 through which the cable 71 is inserted is formed in the shield 74. A gap S of 50 mm is formed between the notch 75 and the cable 71. The inside of the frame 72 is filled with large, medium, and small refractory sponges A, B, and C, which are refractory fillers 18, and the opening 12 is sealed.
[0049]
FIGS. 31 and 32 show a fire protection structure according to a fifth embodiment of the present invention. FIG. 31 is a plan view thereof, and FIG. 32 is a sectional view thereof.
In this embodiment, a shielding plate 82 is provided in the opening 12 of the floor 11, and large, medium, and small refractory sponges A and B, which are the refractory filler 18, are provided in the opening 12 and the frame 83. , C are inserted and filled and hermetically sealed.
[0050]
【The invention's effect】
As described above, according to the fire prevention structure of the present invention, when replacing or adding a long body, the construction can be performed only by pulling out the refractory filler in the relevant portion, as in the related art. In addition, it is not necessary to remove all fire prevention measures such as rock wool and refractory putty, so that construction costs and costs due to loss and disposal of materials can be reduced.
[0051]
In addition, after the replacement and extension work of the long body is completed, simply insert the refractory filler into the gap in the frame (or opening) and close the gap to complete the restoration work. Since a gap of about 50 mm is provided in advance with the body, it is not necessary to take out the shield and form a new notch if the extension is within the range of this size.
[0052]
Therefore, it is possible to release and restore the fire prevention measures very easily and within a short time, and the opening of the fire protection compartment may be left open even during the exchange work, which usually takes several days to several weeks. Safe without any.
[0053]
In addition, since the refractory filler is composed of at least two composites of a thermal expansion material, a flexible material, and a heat absorption material, the thermal expansion material can prevent loss and shrinkage of the refractory filler itself, and the heat absorption material is long. Absorbs heat from the body and prevents weight loss and falling off of the refractory filler itself and surrounding members. Therefore, the effect that the fire resistance performance time can be drastically extended as compared with the related art can be obtained.
[0054]
Further, by combining these components, the performance of the refractory filler can be freely selected in accordance with the characteristics of the long body intended for fire prevention. Therefore, it is possible to provide a fire prevention measure having a high fire prevention performance with a simple structure and construction according to the purpose.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a fire protection structure arranged at an opening of a floor fire protection compartment according to an embodiment of the present invention.
FIG. 2 is a plan view showing a fire-prevention measure structure partially broken away.
FIG. 3 is a perspective view showing a procedure of cable replacement / expansion work and showing a state in which a part of the refractory filler is partially removed.
FIG. 4 is a cross-sectional view showing a state where a part of the refractory filler is similarly taken out.
FIG. 5 is a perspective view showing a state where cables are exchanged and added.
FIG. 6 is a cross-sectional view showing a state where cables are exchanged or added.
FIG. 7 is a sectional view showing a state in which a refractory filler is filled.
FIG. 8 is a perspective view showing a state in which a refractory filler has been filled and cable replacement / expansion work has been completed.
FIG. 9 is a perspective view showing a refractory filler.
FIG. 10 is a diagram showing a state change of a refractory filler during a fire.
FIG. 11 is a perspective view showing a first alternative embodiment of the refractory filler.
FIG. 12 is a perspective view showing a second alternative embodiment of the refractory filler.
FIG. 13 is a perspective view showing a third other embodiment of the refractory filler.
FIG. 14 is a perspective view showing a fourth other embodiment of the refractory filler.
FIG. 15 is a perspective view showing a fifth other embodiment of the refractory filler.
FIG. 16 is a perspective view showing a sixth other embodiment of the refractory filler.
FIG. 17 is a perspective view showing a seventh other embodiment of the refractory filler.
FIG. 18 is a perspective view showing an eighth embodiment of the refractory filler.
FIG. 19 is a perspective view showing a ninth other embodiment of the refractory filler.
FIG. 20 is a perspective view showing a tenth other embodiment of the refractory filler.
FIG. 21 is a perspective view showing an eleventh other embodiment of the refractory filler.
FIG. 22 is a perspective view showing a twelfth other embodiment of the refractory filler.
FIG. 23 is a plan view showing a fire prevention structure according to a second embodiment of the present invention.
FIG. 24 is a cross-sectional view showing a fire prevention structure.
FIG. 25 is a plan view showing a fire prevention measure structure according to a third other embodiment of the present invention.
FIG. 26 is a side sectional view showing a fire prevention structure.
FIG. 27 is a front sectional view showing a fire prevention structure.
FIG. 28 is a plan view showing a fire prevention measure structure according to a fourth other embodiment of the present invention.
FIG. 29 is a cross-sectional view showing a fire protection structure.
FIG. 30 is a front view showing a cable.
FIG. 31 is a plan view showing a fire prevention measure structure according to a fifth other embodiment of the present invention.
FIG. 32 is a cross-sectional view showing a fire protection structure.
FIG. 33 is a sectional view showing a conventional fire protection structure.
[Explanation of symbols]
11 ... Floor (fire protection compartment)
12, 61 ... opening 13, 64 ... shielding plate 14 ... frame 15 ... cable (long body)
18: refractory filler 19a, 67: thermal expansion material sheet (thermal expansion material)
21: Thermal expansion material 22: Flexible block material 23: Heat absorbing material

Claims (10)

A fire protection compartment having an opening through the elongated body,
A fire- resistant frame that is provided on the fire-prevention compartment and has an internal space that is open so that both surfaces communicate with the opening, has an internal space, and penetrates the elongated body .
A fire-resistant shield that is provided so as to close both sides of the frame, and shields the opening.
Notch formed in this shielding body, a notch portion through which the elongated body is inserted with a gap of a predetermined dimension between the outer body and the outer peripheral surface thereof,
A plurality of refractory filler having elasticity to seal the internal space is removably filled in the internal space of the frame,
A thermal expansion material that is interposed between the refractory filler and the shield and shields a gap between the outer peripheral surface of the long body and the notch ,
A fire protection structure comprising: A fire protection compartment having an opening through the elongated body,
A fire-resistant frame that is provided on the fire-prevention compartment and has an internal space that is open so that both surfaces communicate with the opening, has an internal space, and penetrates the elongated body .
A fire- resistant shield that shields the inner bottom of the opening of the fire protection compartment ,
Notch formed in this shielding body, a notch portion through which the elongated body is inserted with a gap of a predetermined dimension between the outer body and the outer peripheral surface thereof,
A plurality of refractory fillers which are removably filled in the opening of the fire protection compartment and have elasticity to seal the opening ,
A thermal expansion material that is interposed between the refractory filler and the shield and shields a gap between the outer peripheral surface of the long body and the notch ,
A fire protection structure comprising: A fire protection compartment having an opening through the elongated body,
A fire-resistant frame that is provided on the fire-prevention compartment and has an internal space that is open so that both surfaces communicate with the opening, has an internal space, and penetrates the elongated body .
A fire-resistant shield that is provided so as to close both sides of the frame, and shields the opening.
Notch formed in this shielding body, a notch portion through which the elongated body is inserted with a gap of a predetermined dimension between the outer body and the outer peripheral surface thereof,
A plurality of refractory filler having elasticity to seal the internal space is removably filled in the internal space of the frame,
A thermal expansion material that is interposed between the refractory filler and the shield and shields a gap between the outer peripheral surface of the long body and the notch ,
With
The refractory filler is a composite made of a combination of at least two of a thermal expansion material that expands when heated, a deformable flexible material, and a heat absorbing material that absorbs surrounding heat. A fire-prevention measure structure characterized by being wrapped in an integrated state by a flammable or non-flammable sheet material. 4. The fire protection structure according to claim 3, wherein the composite is formed by sandwiching the thermal expansion material between a soft material and a heat absorbing material. 4. The fire protection structure according to claim 3, wherein the composite comprises the thermal expansion material and the heat absorbing material sandwiched between a plurality of flexible materials. 4. The fire protection structure according to claim 3, wherein the composite is formed by sandwiching a thermal expansion material between a plurality of flexible materials. 4. The fire prevention structure according to claim 3, wherein the composite is formed by sandwiching a thermal expansion material with a deformable flexible block-shaped heat absorbing material. 4. The fire protection structure according to claim 3, wherein the composite has a flexible material or a heat absorbing material sandwiched between a plurality of thermal expansion materials. The fire prevention structure according to claim 3, wherein the composite is formed by joining a flexible material or a heat absorbing material to a thermal expansion material. The fire protection structure according to any one of claims 3 to 9, wherein a heat conductor is provided on a bottom surface of the composite.

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