WO2010058588A1 - Fire-proof heat-insulating structure, fire-proof heat-insulating wall, and architectural construction - Google Patents

Abstract

Disclosed is a fire-proof heat-insulating structure comprising a plate-like first heat-insulating material which has fire-proofing properties, a reflector which covers at least one surface of the first heat-insulating material, and a second heat-insulating material which covers a surface of the reflector and has a lower melting point than that of the first heat-insulating material.

Description

Fireproof and heat insulating structure, fireproof and heat insulating wall, and building structure

The present invention relates to a fire-resistant and heat-insulating structure suitable for use in so-called 2 × 4 (two-by-four) wooden houses, steel houses, and various building structures such as tunnels, and a fire-resistant and heat-insulated structure including the fire-resistant and heat-insulating structure. The present invention relates to a wall and a building structure using the fireproof insulation wall.
This application claims priority based on Japanese Patent Application No. 2008-295678 filed in Japan on November 19, 2008, the contents of which are incorporated herein by reference.

A structural steel material used for a building structure may require higher fire resistance than other use places depending on the use place. For example, as described in Article 107 of the Japanese Building Standard Act Construction Order, structural steel used as a pillar or beam of a high-rise building structure is counted down from the top floor of the high-rise building structure. When used in the range from 1st floor to 4th floor, fire resistance performance of 1 hour is required. Similarly, when used in the range from 5th floor to 14th floor, fire resistance performance of 2 hours In addition, when it is used in the range of 15 floors or more in the same manner, a fire resistance performance of 3 hours is required.
In addition, when the steel structure is used in a place other than the above, a fire resistance performance of 30 minutes is required.

When a fire occurs in a building structure, the heat from the fire may heat structural materials such as columns, beams, floors, walls, roofs, etc., and the proof stress may decrease. Therefore, in order to protect various structural materials (especially steel materials) from the heat from the fire, it has been proposed to attach a fireproof coating to the portion of the structural material where heat from the fire is expected to be applied ( For example, see Patent Document 1).

There are two types of fireproof coatings of this type: dry and wet. Although the dry type fireproof coating material is excellent in workability, when it is heated to a high temperature due to fire heat, although it is a noncombustible material, it may melt or ignite, and the fireproof performance may be significantly lowered. In addition, the wet type fireproof coating material is excellent in fireproof performance, but the workability and construction environment are poor, and there is a risk that the fireproof performance may be impaired due to peeling due to deterioration over time.

Moreover, the fireproof heat insulation structure as shown in FIG.19 and FIG.20 is also known (for example, refer patent document 2). The figure shows a fireproof and heat insulating structure applied to a load bearing wall using a thin plate lightweight channel steel.
That is, the load-bearing wall having this fireproof and heat insulating structure fixes a plate-like structural face material 125 made of a slag cement pearlite plate having a thickness of about 12 mm to the outer surface of the frame 102, and A heat insulating material 126 made of extruded polystyrene foam having a thickness of 25 mm or more is provided on the outer side, and the outer surface of the heat insulating material 126 is further provided with a wooden ventilation trunk edge 119a (for example, a long member having a rectangular cross section of 45 mm × 18 mm). The material 120 is provided with a structure. Further, an upper reinforcing gypsum board 122 is fixed to the inner surface of the frame body 102 via a lower reinforcing gypsum board 121.

The frame body 102 is disposed across a vertical frame member 103 made of a plurality of thin light-weight grooved steels spaced apart from each other along the horizontal direction, and between the upper ends of the vertical frame members 103. The upper horizontal frame member 105 and the lower horizontal frame member 106 disposed between the lower ends of the vertical frame members 103 are provided.

In this fireproof heat insulating structure, a load-bearing wall 127 of a panel structure constituted by the structural face material 125 and the frame body 102 supports an external load when an earthquake or the like occurs.
By the way, since the heat insulating material 126 made of the extruded polystyrene foam, which is a dry heat insulating material, is a heat insulating material, the melting point is as low as 100 ° C. or less, and sufficient fire resistance performance cannot be expected.

A fireproof and heat insulating structure shown in FIGS. 21 to 23 has been proposed as a fireproof heat insulating performance further improved than the above structure. In the following description, the same or similar components as those in the above structure will be described with the same reference numerals.
This fireproof heat insulating structure can be applied to, for example, a thin and light weight fireproof loadproof wall. In this fireproof and heat insulating structure, a steel folded plate material 109 is fixed to the outside of the outdoor flange 113 of the vertical frame material 103 made of a thin and light-weight channel steel or the horizontal frame materials 105 and 106 provided above and below it. Yes. A metal plate 117 is attached to the outside of the steel folded plate material 109, a heat insulating material 128 made of a rock wool plate is disposed outside the metal plate 117, and further, a steel made of steel is formed outside the heat insulating material 128. The ventilation trunk edge 119a and the exterior material 120 are sequentially attached.

More specifically, a metal plate 117 such as a thin steel plate is fixed to the outdoor side of the folded plate material 109 of the fireproof heat insulating wall 114 shown in FIG. 22 by a screw fixing fixture 104 such as a tapping screw. As a result, a large number of grooves on the outdoor side formed by the web 111 and the flange 112 of the folded plate material 109 are closed by the metal plate 117, so that a large number of horizontally long air spaces 118 having heat insulation and heat retention function A plurality are formed at intervals in the direction.

In addition, a heat insulating material 128 is disposed outside the metal plate 117 and is fixed by a screw fixing fixture 104. Further, a steel ventilation trunk edge 119 made of a steel square steel pipe or the like is disposed on the outside of the heat insulating material 128 in the vertical direction with a gap in the horizontal direction, and then screwed to the vertical frame material 103 or the folded plate material 109. It is fixed by a stop fixing tool 104. Further, an exterior material 120 made of a fiber reinforced cement board or the like is fixed to the outside of each steel ventilation trunk edge 119a by a screw fixing fixture 104.
In addition, each steel ventilation trunk edge 119a is a square steel pipe having an outer dimension of about 75 × 16 mm and a plate thickness of about 2.4 mm. Moreover, the plate | board thickness of the exterior material 120 is about 12 mm, for example.

On the indoor side of each vertical frame member 103, a reinforced gypsum board 134 made up of a lower reinforced gypsum board 121 and an upper reinforced gypsum board 122 is fixed by a screw fixing fixture 104.
As in this example, when the reinforced gypsum board 134 is composed of the lower reinforced gypsum board 121 and the upper reinforced gypsum board 122, the lower reinforced gypsum board 121 having a thickness of about 15 mm is Further, the upper reinforcing gypsum board 122 having a thickness of about 12.5 mm is fixed to the interior side of the lower reinforcing gypsum board 121 by a screw fixing fixture 104.

According to the fireproof heat insulating structure described above, the metal plate 117 reflects infrared rays from the fire that has occurred outside the room to the outside of the room, thereby increasing the temperature of each vertical frame member 103 located on the indoor side of the metal plate 117. Since it can suppress, 1 hour fireproof performance is securable.
Moreover, in this fireproof heat insulation structure, the metal plate 117 is arrange | positioned on the outer side of the steel folding plate material 109, and also the heat insulating material 128 is arrange | positioned on the outer side of this metal plate 117. Therefore, when a fire occurs on the outdoor side, heat conduction by the high-temperature air that has entered between the steel ventilation cylinder edges 119a, heat conduction through the exterior material 120 and each steel ventilation cylinder edge 119, or heating by a flame. Each vertical frame member 103 is heated by heat conduction in which heat is transmitted through the heat insulating material 128, the metal plate 117, and the folded plate material 109 through heat from the exterior material 120 and the fire infrared rays that leak from the joint gaps of the exterior material 120.

There is also known a heat insulating structure in which color coated steel plates having a thickness of 0.5 mm or more are arranged with a space between each other, and rock wool or the like is foamed and tightly integrated between them. However, in this structure, in order to produce rock wool by foaming, it is essential to arrange a pair of color-coated steel sheets that form the front and back surfaces, and the plate thickness is also as thick as 0.5 mm or more, The heat insulation structure becomes heavy. Therefore, there is a problem that workability at the time of transporting and installing the heat insulating structure is poor, and the cost required for installation becomes remarkably high.
In addition to the structure described above, structures as described in Patent Documents 3 to 6 below are also known.

Japanese Patent Laid-Open No. 2003-171988 JP 2006-177081 A JP 2008-88767 A JP 2007-327285 A JP 2004-353360 A JP 2003-343028 A

As described above, in the structure in which the heat insulating material is disposed outside the metal plate, the temperature of the heat insulating material or the temperature of the vertical frame material tends to be high, and the infrared reflectance of the metal plate cannot be effectively exhibited.
In addition, in the case of a heat insulating structure in which color coated steel plates are arranged at a distance from each other, there is a problem that the weight becomes heavy and the cost required for installation becomes remarkably high.

The present invention has been made in view of the above circumstances, and effectively exhibits the fire resistance performance originally provided by the fireproof heat insulating material, and the fireproof performance is not easily lost even for a long-time fire, and is inexpensive. An object of the present invention is to provide a fire-resistant and heat-insulating structure having high fire-resistance performance, a fire-resistant and heat-insulating wall provided with the fire-resistant and heat-insulating structure, and a building structure using the fire-resistant and heat-insulating wall.

The present invention employs the following means in order to solve the above problems and achieve the object. That is,
(1) A fire-resistant and heat-insulating structure of the present invention includes a plate-like first heat-insulating material having fire resistance; a reflecting plate covering at least one surface of the first heat-insulating material; covering the surface of the reflecting plate; A second heat insulating material having a melting point lower than that of the first heat insulating material.

(2) In the fireproof thermal insulation structure according to (1) above, the melting point of the second heat insulating material may be 50 ° C. or higher and 100 ° C. or lower.
(3) The fireproof heat insulating structure according to (1) further includes a plurality of trunk edges arranged on the surface of the reflector so as to be spaced apart from each other; Arranged between edges; a configuration may be employed.

(4) In the fireproof heat insulating structure according to (1), the first heat insulating material may have self-extinguishing properties at a high temperature of 300 ° C. or higher.
(5) In the fireproof heat insulating structure according to (1) above, the infrared reflectance of the surface of the reflector may be 0.4 or more and 1.0 or less.

(6) In the fireproof and heat insulating structure according to (1) above, an overlapping portion that overlaps with an edge of another reflecting plate adjacent to the reflecting plate may be provided on the reflecting plate.
(7) In the fireproof heat insulating structure according to (6) above, the overlapping portion may have a spliced structure.
(8) In the fireproof heat insulating structure according to (1) above, the extension of the joint between the edge of the first heat insulating material and the edge of the other first heat insulating material adjacent to the first heat insulating material. The extending direction of the overlapping portion may intersect the direction.

(9) Another fireproof heat insulating structure of the present invention includes a plate-like first heat-insulating material having fire resistance and a reflecting plate covering at least one surface of the first heat-insulating material.

(10) In the fireproof heat insulating structure according to (9) above, the first heat insulating material may have self-extinguishing properties at a high temperature of 300 ° C. or higher.
(11) In the fireproof heat insulating structure according to (9) above, the infrared reflectance of the surface of the reflector may be 0.4 or more and 1.0 or less.
(12) In the fireproof and heat insulating structure according to (9) above, an overlapping portion that is overlapped with an edge portion of another reflecting plate adjacent to the reflecting plate may be provided on the reflecting plate.

(13) In the fireproof and heat insulating structure according to (12) above, the overlapping portion may have a spliced structure.
(14) In the fireproof heat insulating structure according to (12) above, the extension of the joint between the edge of the first heat insulating material and the edge of another first heat insulating material adjacent to the first heat insulating material. The extending direction of the overlapping portion may intersect the direction.

(15) A fire-resistant and heat-insulating wall according to the present invention comprises a plate-shaped strength member and the fire-resistant and heat-insulating structure according to any one of (1) to (14) provided so as to overlap the strength member. Prepare.
(16) A building structure of the present invention includes the fireproof heat insulating wall described in (15) above.

According to the fireproof heat insulating structure described in (1) above, when a fire occurs on the side facing the second heat insulating material, the heat from the fire can be used to melt and remove the second heat insulating material. Along with this melting and removal, the reflecting plate that has been covered and protected by the second heat insulating material can be exposed to the flame early so that the heat (infrared rays) from the flame is reflected early by the reflecting plate. The flame shielding performance and infrared high reflection performance can be exhibited. As a result, since the amount of heat transferred to the first heat insulating material can be extremely reduced, it is possible to effectively exhibit the fireproof heat insulating property that the first heat insulating material originally has.
Moreover, since the reflecting plate is covered and protected by the second heat insulating material in a normal time when no fire is generated, the flame shielding performance and infrared high reflection performance of the reflecting plate can be maintained for a long time.
Moreover, since it has a double heat insulating structure composed of the first heat insulating material and the second heat insulating material, it is possible to ensure high heat insulating performance between the front and back surfaces of the fireproof heat insulating structure in a normal time when no fire has occurred. it can.
Furthermore, the structure is simple and easy to manufacture, and an inexpensive fireproof and heat insulating structure can be constructed.

Further, according to the fireproof heat insulating structure described in (2) above, since the second heat insulating material can be removed from the surface of the reflecting plate at a relatively low heating temperature in the event of a fire, the reflecting plate is shielded early. Flame performance and infrared high reflection performance can be exhibited.
Moreover, according to the fireproof heat insulation structure as described in said (3), rather than stacking the second heat insulating material on each body edge, the second heat insulating material is provided there by utilizing the space between each body edge. Since it provides, the thickness of this fireproof heat insulation structure can be made thin. Therefore, it is possible to ensure the heat insulation in the normal time when no fire has occurred without increasing the thickness of the fireproof heat insulating structure.

In addition, according to the fireproof heat insulating structure described in (4) above, even if the first heat insulating material is exposed to a high temperature of 300 ° C. or higher due to heat transfer accompanying the occurrence of a fire, its self-extinguishing property can be achieved if it is separated from the flame. Demonstrate and never burn. Therefore, when this fireproof heat insulating structure is attached to the first heat insulating material with respect to the fireproof protective housing for which fire resistance is required, even if the first heat insulating material is heated by the heat of the fire, its self-extinguishing property Therefore, the fireproof protective housing can be more reliably protected.
Moreover, according to the fireproof heat insulation structure as described in said (5), the infrared rays from a flame can be reflected efficiently by making infrared reflectance into the range of 0.4 or more and 1.0 or less. It is possible to suppress the amount of heat transfer to the first heat insulating material and more reliably suppress the temperature rise.

In addition, according to the fireproof and heat insulating structure described in (6) above, a large reflector having a relatively large surface area can be constructed by combining small reflectors having a relatively small surface area. Moreover, since it has an overlapping portion, it is possible to prevent a flame from entering from this overlapping portion (the joint between the edges of the small reflector), and exhibits sufficient flame shielding performance and high infrared reflection performance. I can do it.
Moreover, according to the fireproof heat insulation structure as described in said (7), a big reflector provided with the continuous reflective surface without a joint can be obtained by connecting small reflectors with a splice structure. And since it is the connection by splicing, the flame approach from between the edge parts of each reflector can be prevented more reliably.
Moreover, according to the fireproof thermal insulation structure described in the above (8), since the overlap between the joining portion and the overlapping portion can be minimized, the heat of the fire is transmitted through the overlapping portion and the joining portion. Can be suppressed as much as possible. Therefore, the fireproof heat insulation performance of this fireproof heat insulation structure can be enhanced.

Moreover, according to the fireproof thermal insulation structure described in (9) above, when a fire occurs on the side facing the surface of the reflector, the heat (infrared rays) from the fire is reflected by the reflector and its flame shielding performance. In addition, high infrared reflection performance can be exhibited. As a result, since the amount of heat transferred to the first heat insulating material can be extremely reduced, it is possible to effectively exhibit the fireproof heat insulating property that the first heat insulating material originally has.
Furthermore, the structure is simple and easy to manufacture, and an inexpensive fireproof and heat insulating structure can be constructed.

In addition, according to the fireproof heat insulating structure described in (10) above, even if the first heat insulating material is exposed to a high temperature of 300 ° C. or higher due to heat transfer accompanying the occurrence of a fire, its self-extinguishing properties can be achieved if it is separated from the flame. Demonstrate and never burn. Therefore, when this fireproof heat insulating structure is attached to the first heat insulating material with respect to the fireproof protective housing for which fire resistance is required, even if the first heat insulating material is heated by the heat of the fire, its self-extinguishing property Therefore, the fireproof protective housing can be more reliably protected.
Moreover, according to the fireproof heat insulation structure as described in said (11), the infrared rays from a flame can be reflected efficiently by making infrared reflectance into the range of 0.4 or more and 1.0 or less. It is possible to suppress the amount of heat transfer to the first heat insulating material and more reliably suppress the temperature rise.
In addition, according to the fireproof and heat insulating structure described in (12) above, a large reflector having a relatively large surface area can be constructed by combining small reflectors having a relatively small surface area. Moreover, since it has an overlapping portion, it is possible to prevent a flame from entering from this overlapping portion (the joint between the edges of the small reflector), and exhibits sufficient flame shielding performance and high infrared reflection performance. I can do it.

Moreover, according to the fireproof heat insulation structure as described in said (13), a big reflector provided with the continuous reflective surface without a joint can be obtained by connecting small reflectors with a splice structure. And since it is the connection by splicing, the flame approach from between the edge parts of each reflector can be prevented more reliably.
Moreover, according to the fireproof thermal insulation structure described in the above (14), since the overlap between the joining portion and the overlapping portion can be minimized, the heat of the fire is transmitted through the overlapping portion and the joining portion. Can be suppressed as much as possible. Therefore, the fireproof heat insulation performance of this fireproof heat insulation structure can be enhanced.
In the fireproof and heat insulating structure described in any one of (1) to (14) above, the thickness of the reflecting plate is set to 0.4 mm or less, compared to a case where the thickness is larger than this. Weight reduction can be achieved. Therefore, the workability | operativity at the time of constructing | assembling a fireproof heat insulation structure using this fireproof heat insulation structure can be improved.

Moreover, according to the fireproof heat insulation wall as described in said (15), since the fireproof heat insulation nature which a 1st heat insulating material originally has can be exhibited effectively, a strength member is heated with the heat of a fire and strength becomes insufficient. You can prevent falling.
Moreover, according to the building structure as described in said (16), the outstanding fire-proof heat insulation property can be exhibited.

It is a longitudinal section of the fireproof heat insulation structure concerning a 1st embodiment of the present invention. It is a longitudinal cross-sectional view of the fireproof heat insulation wall provided with the same fireproof heat insulation structure. It is a perspective view of the house which applied the fireproof heat insulation wall. It is a longitudinal cross-sectional view of the other fireproof heat insulation wall provided with the said fireproof heat insulation structure. It is a perspective view of the tunnel which applied the fireproof heat insulation wall. It is a figure which shows the fireproof heat insulation structure which concerns on 2nd Embodiment of this invention, Comprising: It is a longitudinal cross-sectional view before joining mutually adjacent reflectors. It is a figure which shows a fireproof heat insulation structure, Comprising: It is a longitudinal cross-sectional view after joining the mutually adjacent reflectors. It is a figure which shows the same fireproof heat insulation structure, Comprising: It is a perspective view which shows the positional relationship of the junction part between mutually adjacent fireproof heat insulating materials, and the overlapping part between mutually adjacent reflectors. It is a perspective view of the fireproof heat insulation wall which concerns on 3rd Embodiment of this invention. It is a partial longitudinal cross-sectional view of the fireproof heat insulation wall. It is a figure which shows the wall structure applied to the said fireproof heat insulation wall, Comprising: (a) is a front view, (b) is a side view, (c) is a plane sectional view seen in the AA line of (a) It is. It is a longitudinal section of the fireproof heat insulation structure concerning a 4th embodiment of the present invention. It is a longitudinal cross-sectional view of the fireproof heat insulation wall provided with the same fireproof heat insulation structure. It is a perspective view of the house which applied the fireproof heat insulation wall. It is a figure which shows the fireproof heat insulation structure which concerns on 5th Embodiment of this invention, Comprising: It is a longitudinal cross-sectional view before joining the mutually adjacent reflectors. It is a figure which shows a fireproof heat insulation structure, Comprising: It is a longitudinal cross-sectional view after joining the mutually adjacent reflectors. It is a figure which shows the same fireproof heat insulation structure, Comprising: It is a perspective view which shows the positional relationship of the junction part between mutually adjacent fireproof heat insulating materials, and the overlapping part between mutually adjacent reflectors. It is a perspective view of the fireproof heat insulation wall which concerns on 6th Embodiment of this invention. It is a partial longitudinal cross-sectional view of the fireproof heat insulation wall. It is a graph which shows the temperature transition of a vertical frame material when a 1 hour heating test is done with respect to the fireproof heat insulation wall of this invention, and the fireproof heat insulation wall of a comparative example. It is a vertical side view which shows an example of the wall structure of the conventional external heat insulation form. It is a partial plane sectional view of the same wall structure. It is a perspective view which shows the other example of the wall structure of the conventional external heat insulation type. It is a longitudinal cross-sectional view of the same wall structure. It is a partial plane sectional view of the same wall structure.

Each embodiment of the fireproof heat insulation structure of the present invention, a fireproof heat insulation wall, and a building structure is described below, referring to drawings.
The term “fireproof heat insulating structure” in the present invention is not limited to a fireproof heat insulating panel manufactured in advance in a factory, but includes a fireproof heat insulating member assembled and constructed at a construction site.

[First Embodiment]
As shown in FIG. 1, the fireproof heat insulating structure 30 of the present embodiment includes a fireproof heat insulating material (first heat insulating material) 28 made of rock wool board having a plate shape and fire resistance, and a paper surface of the fireproof heat insulating material 28. The reflecting plate 16 that is overlaid so as to cover all of the upper surface 28a, and the heat insulating material 31 (second heat insulating material) that covers all of the surface 29 of the reflecting plate 16 and has a melting point lower than that of the refractory heat insulating material 28. And.
The reflector 16 is fixed by a plurality of screwing fasteners 4 such as drill screws in a state where the back surface 29a is in contact with the surface 28a of the refractory heat insulating material 28. The heat insulating material 31 is also fixed by a plurality of screwing fasteners 4 such as drill screws in a state where the back surface thereof is in contact with the front surface 29 of the reflecting plate 16.

When the above-mentioned heat insulating material 31 constructs a house etc. using this fireproof heat insulation structure 30, it plays the role of ensuring suitable living environment property by maintaining the room temperature in the house etc. appropriately. As the heat insulating material 31, it is preferable to employ a material that has almost no viscosity and adhesive strength in a molten state.
The fireproof heat insulating material 28 has self-extinguishing properties at a high temperature of 300 ° C. or higher. The self-extinguishing property referred to here means a property of burning while exposed to a flame, but naturally extinguishing when separated from the flame. Specifically, it is defined in JIS K 6911. Refers to the method A. That is, after a test piece corresponding to the refractory heat insulating material 28 is brought close to a flame and burned, the flame is moved away. Then, when the burning of the test piece disappears within 180 seconds and the burned length is 25 mm or more and 100 mm or less, it is defined as “self-extinguishing”. As the fireproof heat insulating material 28 having such a self-extinguishing property, the above-described rock wool plate is preferable because it is inexpensive, but other than the rock wool plate, for example, a ceramic board or the like can be used.

As the reflection plate 16, for example, a thin steel plate or the like can be used. When the thickness of the reflecting plate 16 is 0.4 mm or less, the weight can be reduced as compared with the case where the thickness is 0.5 mm or more. As a result, it contributes to the weight reduction of the fireproof thermal insulation structure 30 and is preferable because workability at the time of installing it is improved. The lower limit of the thickness of the reflecting plate 16 is preferable, but practically, it is preferable to set the thickness to 0.1 mm or more and 0.23 mm or less in consideration of workability when handling the reflecting plate 16. .
Therefore, the thickness of the reflecting plate 16 is preferably in the range of 0.1 mm or more and 0.4 mm or less from the practical viewpoint.

The infrared reflectance of the surface 29 of the reflecting plate 16 is 0.4 or more and 1.0 or less, more preferably 0.8 or more and 0.95 or less. This is because when the infrared reflectance is less than 0.4, the reflection performance can hardly be exhibited, and when it exceeds 0.95, its production becomes extremely difficult.
In order to set the infrared reflectance of the surface 29 of the reflecting plate 16 to 0.4 or more and 1.0 or less, for example, when a thin steel plate is employed, the surface may be polished. Can be about 0.86. In addition, the surface 29 of the reflecting plate 16 can be plated, or a metal foil such as a stainless steel foil can be attached. In this case, the infrared reflectance can be improved from about 0.8 to 0.95.

FIG. 2A and FIG. 2B have shown the figure at the time of applying the fireproof heat insulation structure 30 of this embodiment to the wall body (fireproof heat insulation wall) 200 of a house (building structure).
As shown to FIG. 2A, the wall body 200 of this embodiment arrange | positions the refractory heat insulating material 28 in the outer surface side (outdoor side) of the housing (strength member) 23, and also in order to ensure the reflector 16 and living environment property These heat insulating materials 31 are overlapped with each other, and these are penetrated by a plurality of screwing fixtures 4 such as drill screws and fixed to a support member (not shown) provided on the housing 23.

Moreover, FIG. 3A and FIG. 3B have shown the figure at the time of applying the fireproof heat insulation structure 30 of this embodiment to the roof (fireproof heat insulation wall) 250 of a tunnel (building structure).
As shown to FIG. 3A, the roof 250 of this embodiment arrange | positions the refractory heat insulating material 28 in the lower surface side (indoor side) of the housing 24, and also has the reflector 16 and the heat insulating material 31 for ensuring a living environment property. Are overlapped with a plurality of screwing fixtures 4 such as drill screws, and fixed to a support member (not shown) provided on the casing 24.

In any case of the wall body 200 and the roof 250, it is preferable to employ a material having a property that melts at a high temperature of 100 ° C. or more and does not easily adhere to the reflector 16 as the heat insulating material 31. For example, a heat insulating material made of extruded polystyrene foam can be used.
Since this heat insulating material 31 is a heat insulating material for ensuring a living environment to the last, fire resistance is not required. The heat insulating material 31 melts when exposed to a high temperature of 100 ° C. or more during a fire, and hardly adheres to the surface 29 of the reflecting plate 16. Therefore, since the surface 29 can be exposed reliably and the performance of the reflecting plate 16 can be exhibited at an early stage, the flame shielding property and the high infrared reflectivity can be surely exhibited.

In the example of the wall body 200 and the roof 250, when a fire occurs on the side facing the heat insulating material 31, the heat insulating material 31 is first melted and removed at a high temperature of 100 ° C. or higher. As a result, the following effects (1) and (2) can be exhibited.
(1) The fire-resistant heat insulating material 28 can exert an effect of suppressing direct ignition to fire, that is, flame shielding.
(2) By reflecting the radiant heat due to the fire by the surface 29 of the reflecting plate 16, it is possible to exhibit the effect of suppressing the transfer of heat to the refractory heat insulating material 28, that is, high infrared reflectivity.

By the way, when the reflecting plate 16 is exposed without providing the heat insulating material 31 from the beginning, since the heat conductivity of the reflecting plate 16 is higher than that of the heat insulating material 31, the temperature change between the reflecting plate 16 and the housing 23. The gradient of the dwelling increases and the living environment related to the living environment temperature decreases. On the other hand, as shown in FIG. 2A, by providing a heat insulating material 31 on the surface 29 of the reflecting plate 16, the gradient of temperature change between the reflecting plate 16 and the housing 23 is significantly reduced. The temperature change on the indoor side becomes moderate, and the living environment related to the indoor temperature is improved.

Further, in the event of a fire, the heat insulating material 31 is melted at a high temperature of 100 ° C. or more, and further, is not attached to the surface 29 of the reflector 16 and is automatically removed by a flame flow due to fire or its own weight. Moreover, the flame-shielding property by the reflecting plate 16 and the high radiant heat reflectivity can be exhibited at an early stage. Therefore, the temperature rise of the fireproof heat insulating material 28 can be reduced, the temperature rise of the casing 23 (or the casing 24) forming the strength member can be reduced, and the fireproof performance can be improved.
In the present embodiment, since the reflector 16 and the heat insulating material 31 are superposed on the fireproof heat insulating material 28 alone and then attached by the screw fixing fixture 4, the structure is simple and easy to manufacture, and inexpensive fireproof. The heat insulating structure 30 can be provided.

The effects of the present embodiment having the above-described configuration are summarized below.
The fireproof heat insulating structure 30 of the present embodiment includes a plate-like fireproof heat insulating material 28 having fire resistance; a reflecting plate 16 that covers a surface 28a that is one surface of the fire resistant heat insulating material 28; and a surface of the reflecting plate 16 29, and a heat insulating material 31 having a melting point lower than that of the refractory heat insulating material 28.
According to this fireproof heat insulating structure 30, when a fire occurs on the side where the heat insulating material 31 faces, the heat insulating material 31 can be melted and removed by using heat from the fire. With this melting and removal, the reflector 16 that has been covered and protected by the heat insulating material 31 can be exposed to the flame at an early stage, so that the heat (infrared rays) from the flame is reflected by the reflector 16 at an early stage. The flame barrier performance and infrared high reflection performance can be exhibited. As a result, the amount of heat transferred to the fireproof heat insulating material 28 can be extremely reduced, so that the fireproof heat insulating property that the fireproof heat insulating material 28 originally has can be effectively exhibited.

Moreover, since the reflecting plate 16 is covered and protected by the heat insulating material 31 at the normal time when no fire is generated, the flame shielding performance and infrared high reflecting performance of the reflecting plate 16 can be maintained for a long time.
And since it has the double heat insulation structure which consists of the heat insulating material 31 and the fireproof heat insulating material 28, it can ensure the high heat insulation performance between the front and back of this fireproof heat insulating structure 30 in the normal time when the fire does not generate | occur | produce. it can.
Furthermore, the structure is simple and easy to manufacture, and an inexpensive fireproof and heat insulating structure can be constructed.

Moreover, in the fireproof heat insulation structure 30 of this embodiment, the melting point of the heat insulating material 31 is 50 ° C. or more and 100 ° C. or less.
According to this structure, since the heat insulating material 31 can be removed from the surface of the reflector 16 at a relatively low heating temperature in the event of a fire, the flame shielding performance and infrared high reflection performance of the reflector 16 are exhibited at an early stage. be able to.
The melting point in the present invention is not necessarily limited to the melting point defined in physics. When there is a temperature at which softening starts in the course of changing from a solid to a liquid by heating, as in some amorphous materials or thermoplastic resins, this temperature is defined as the melting point. For example, the physical melting point of polystyrene, which is a thermoplastic resin, is 230 ° C., but the temperature at which polystyrene actually softens and begins to fluidize is about 90 ° C. (also called the glass transition point). In the present invention, the melting point of polystyrene is defined as 90 ° C.
If the melting point of the heat insulating material 31 is less than 50 ° C., the heat insulating material may be deformed by solar heat in summer. Therefore, the melting point of the heat insulating material 31 is desirably 50 ° C. or higher. More desirably, it is 60 ° C. or higher. On the other hand, when the melting point of the heat insulating material 31 exceeds 100 ° C., the exposure of the reflecting plate 16 is delayed at the time of a fire, and it becomes difficult to exhibit flame shielding performance and infrared reflection performance at an early stage. Therefore, the melting point of the heat insulating material 31 is desirably 100 ° C. or less. More desirably, it is 90 ° C. or lower.

Moreover, in the fireproof heat insulation structure 30 of this embodiment, the fireproof heat insulating material 28 has a self-extinguishing property under high temperature of 300 degreeC or more.
According to this configuration, even if the refractory heat insulating material 28 is exposed to a high temperature of 300 ° C. or higher due to heat transfer accompanying the occurrence of a fire, if it is separated from the flame, it will exhibit its self-extinguishing properties and will not burn. Therefore, when this fireproof insulation structure 30 is attached to the above-described housings 23 and 24, which require fire resistance, in the fireproof insulation 28, even if it is heated up to the fireproof insulation 28 by heat from the fire, its self Since the fire extinguishing property is not exhibited and it does not burn, the casings 23 and 24 can be more reliably protected.

Moreover, in the fireproof heat insulation structure 30 of this embodiment, the infrared reflectance of the surface 29 of the reflecting plate 16 is 0.4 or more and 1.0 or less.
According to this configuration, infrared rays from the flame can be efficiently reflected by setting the infrared reflectance in the range of 0.4 or more and 1.0 or less, so that the amount of heat transfer to the refractory insulation 28 is suppressed. The temperature rise can be more reliably suppressed.

The wall body 200 of the present embodiment includes a housing 23 that is a plate-like strength member, and a fireproof and heat insulating structure 30 that is provided to overlap the housing 23.
According to the wall body 200, the fireproof heat insulating property inherent to the fireproof heat insulating material 28 can be effectively exerted, so that it is possible to prevent the casing 23 from being heated by the heat of the fire and falling short of strength. In addition, also in the case of the said wall body 250, the effect similar to the wall body 200 can be acquired.
Furthermore, since the said house which is a building structure of this embodiment is equipped with the said wall body 200, it can exhibit the outstanding fireproof heat insulation. The above tunnel can also obtain the same effect.
In addition, since the extrusion method polystyrene foam employ | adopted as a raw material of the heat insulating material 31 in this embodiment expands and expands polystyrene about 30 times, the thermal decomposition product generated when this combusts is the same volume. The amount of dirt on the surface 29 of the reflector 16 is very small as compared with other building materials having a small size.
The heat insulating wall used for the outer heat insulation is preferably provided with vents at the upper and lower portions of the wall. Such a vent naturally plays a role of heat insulation for realizing a comfortable living environment. In the present invention, in the event of a fire, fresh air is taken in from the vents to promote complete combustion of the extruded polystyrene foam, and some soot is discharged from the vents. Can be minimized. Therefore, the reflectance of the reflecting plate 16 can be maintained in a good state for a long time.
In the present embodiment, the extruded polystyrene foam is exemplified as the heat insulating material 31 which is a low melting point heat insulating material. However, the present invention is not limited thereto, and for example, polyurethane foam, polyethylene foam, and the like can be employed.

[Second Embodiment]
A second embodiment of the present invention will be described below with reference to FIGS. 4 and 5. In the following description, differences from the first embodiment will be mainly described, and the description of other parts will be omitted because it is the same as the configuration of the first embodiment.
As shown in FIGS. 4 and 5, in the fireproof and heat insulating structure 30 </ b> A of the present embodiment, the reflector 16 having a large surface area is not used alone, but a plurality of reflectors 16 are arranged in the horizontal direction or the vertical direction. The form in the case of arrangement is shown. 4 and 5, the illustration of the heat insulating material 31 is omitted for the sake of explanation.

That is, as shown in FIG. 4, hooks (V-shaped or U-shaped) are engaged with each of the edges of the reflecting plates 16 adjacent to each other when viewed in a cross-section along the thickness direction thereof. A portion 32 is formed. Then, as shown in FIG. 4, the engagement groove 32 a and the engagement piece 32 b in the engagement portion 32 of one reflection plate 16 are replaced with the engagement piece 32 b and the engagement groove in the engagement portion 32 of the other reflection plate 16. Overlap with the state engaged with 32a. Thereafter, the respective engaging portions 32 in a state of being engaged with each other are pressure-bonded toward the refractory heat insulating material 28, thereby forming an overlapping portion 32c having a spliced structure as shown in FIG.

As described above, the overlapping portion 32c is formed between the edge portions of the reflecting plates 16 adjacent in the vertical direction or the horizontal direction. Therefore, even if each edge part of each reflecting plate 16 is exposed to a fire, no gap is formed here, so that the flame shielding property and high infrared reflectivity of the reflecting plate 16 can be sufficiently exhibited. As a result, the fireproof insulation 28 can be protected and its fireproof performance can be fully exhibited.
In addition, in the superimposition part 32c, you may employ | adopt the structure which superimposes edge parts simply instead of a splicing structure, However, The splicing structure can obtain fireproof heat insulation performance more reliably. .

In the case where a plurality of fire-resistant and heat insulating structures 30A are adjacent to each other to construct a fire-resistant and heat-insulating wall, for example, as shown in FIG. The extending direction A2 of the overlapping portion 32c intersects (that is, orthogonal to the front view) with respect to the extending direction A1 of the joint portion (joint portion) with the edge of the other adjacent refractory heat insulating material 28. Is preferred.
The reason for this is that the flame is extremely unlikely to pass through the joints between the reflecting plates 16 because of the saddle-like structure, but by arranging the overlapping part 32c so as to be orthogonal to the joints, the heat generated by the flames This is because it can be more reliably prevented from passing through the overlapping portion 32c and further passing through the joint portion and being transmitted to the casing to be protected. In addition, in FIG. 6, illustration of the heat insulating material 31 is abbreviate | omitted for description.

The effects of the present embodiment having the above-described configuration are summarized below.
In the fireproof and heat insulating structure 30 </ b> A of the present embodiment, the reflecting plate 16 is formed with an overlapping portion 32 c that is overlapped with the edge of another reflecting plate 16 adjacent to the reflecting plate 16.
According to this configuration, a large reflector 16 having a relatively large surface area can be constructed by combining small reflectors 16 having a relatively small surface area. In addition, since the overlapping portion 32c is provided, it is possible to prevent a flame from entering from the overlapping portion 32c (the joint portion between the edges of the small reflector 16), and sufficient flame shielding performance and infrared high reflection performance. Can be demonstrated.

Moreover, in the fireproof and heat insulating structure 30A of the present embodiment, the overlapping portion 32c has a spliced structure.
According to this structure, since it is the connection by splicing, the flame approach from between the edge parts of each reflector 16 can be prevented more reliably.

In the fireproof heat insulating structure 30A of the present embodiment, the extending direction A1 of the joint between the edge of the fireproof heat insulating material 28 and the edge of another fireproof heat insulating material 28 adjacent to the fireproof heat insulating material 28 is used. Thus, the extending direction A2 of the overlapping portion 32c is orthogonal (intersect).
According to this configuration, since the overlap between the joining portion and the overlapping portion 32c can be minimized, it is possible to suppress the heat of fire from passing through the joining portion after passing through the overlapping portion 32c as much as possible. . Therefore, the fireproof and heat insulating performance of the fireproof and heat insulating structure 30A can be enhanced.

[Third Embodiment]
A third embodiment of the present invention will be described below with reference to FIGS.
In the present embodiment, the above-described fireproof and heat insulating structure 30 described in the first embodiment is combined with the wall panel 1 which is the load bearing wall shown in FIGS. The fireproof insulation wall 33 shown in FIG. 8 is assembled. The structure of the fireproof heat insulating wall 33 is suitable for use in, for example, a load bearing wall that is a thin and lightweight structure and requires fireproof heat insulating performance.

As shown in FIGS. 9A to 9C, the wall panel 1 includes a rectangular frame 2. The frame body 2 includes a plurality of vertical frame members 3 arranged at intervals from each other; an upper horizontal frame arranged over the upper end portions of the vertical frame members 3 and joined by a plurality of screwing fasteners 4. And a lower horizontal frame member 6 disposed over the lower end portion of each vertical frame member 3 and joined by a plurality of screwing fasteners 4.
The frame body 2 is intended to prevent twisting of each vertical frame member 3 by fixing a steel folded plate material 9 to the frame member 2 instead of providing a reinforcing cross between the vertical frame members 3. Yes.

As shown in FIG. 9 (c), the vertical frame members 3 at the left and right ends of the wall panel 1 are screwed in a state in which a pair of thin light-weight channel steels 7 are in contact with each other back to back at the web 8 portion. It is integrated by the stop fixing tool 4.
The upper horizontal frame member 5, the lower horizontal frame member 6, and the vertical frame members 3 are all made of thin lightweight steel. The thin plate lightweight section steel has a plate thickness of 0.8 mm to 2.3 mm, and more preferably a plate thickness of 1.0 mm to 1 because the steel folded plate material 9 is fixed to the frame 2 by the screw fixing fixture 4. A shape steel produced by roll forming of a 6 mm thin steel plate (for example, a shape steel such as a grooved steel with a lip or a grooved steel) can be employed.

The steel folded plate material 9 is obtained by bending a thin steel plate having a thickness of 1.0 mm or less, which is thinner than the thickness of the frame body 2, by roll forming. By this bending process, a trapezoidal cross section having an upper flange 10, a web 11 that is continuous with the upper flange 10 and that is inclined at a gentle inclination, and a lower flange 12 that is continuous with the web 11 and is parallel to the upper flange 10. An angular corrugated steel folded plate material 9 is obtained.
9B, the rigidity and proof stress of the steel folded plate material 9 are reduced by making the width dimension of the upper flange 10 and the lower flange 12 smaller than the width dimension of the web 11. Is increasing.

In the present embodiment, the folded steel plate material 9 having a trapezoidal square wave shape in cross section is disposed on one side of the outdoor side of the frame body 2 so that the folding line is orthogonal to the extending direction of each vertical frame material 3. Has been. And the edge part of the longitudinal direction of the lower flange 12 is being fixed to each vertical frame material 3 with the screwing fixing tool 4. FIG.
In addition, the lower flanges 12 at both ends in the vertical direction of the steel folded plate material 9 are screwed at intervals in the left-right direction in contact with the flanges of the upper horizontal frame material 5 and the lower horizontal frame material 6, respectively. It is fixed by a stop-fixing tool 4.
Moreover, in this embodiment, since the folding line | wire of the steel folding plate material 9 has made the right angle with respect to the extending direction of each vertical frame material 3, the cross-sectional secondary moment per the same width | variety of a folding line | wire is FIG. The vertical cross section shown in FIG. 9B is higher than the horizontal cross section shown in FIG. Therefore, the torsional deformation of each vertical frame member 3 is effectively suppressed.

As described with reference to (a) to (c) of FIG. 9, the wall panel 1 includes a plurality of vertical frame members 3 made of a thin lightweight grooved steel 7 and horizontal frame members arranged above and below them. 5 and 6, and the horizontal frame members 5 and 6 and the steel folded plate member 9 fixed to the vertical frame member 3.
As shown in FIGS. 7 and 8, a refractory heat insulating material 28 is fixed to the outside (outdoor) of the steel folded plate material 9, and a reflector 16 is fixed to the outdoor side of the refractory heat insulating material 28. . Further, a plurality of steel ventilation trunk edges 19a and an exterior member 20 are attached to the outside of the reflection plate 16 in this order.

Furthermore, in this embodiment, the heat insulating material 31 for ensuring a living environment property is arrange | positioned on the surface 29 of the reflecting plate 16, and the space position between the steel ventilation trunk edges 19a. And the heat insulating material 31 is attached to the reflecting plate 16 by the screwing fixture 4. In addition, as a ventilation trunk edge, in order to ensure higher living environment property, you may use the wooden ventilation trunk edge with low heat conductivity.

In addition, as the refractory heat insulating material 28 and the reflection plate 16, a refractory heat insulation panel with a reflection plate integrated with them in advance may be used. In this case, the refractory heat insulating material 28 may be attached to the reflecting plate 16 with a drill washer with a presser washer (not shown).

In the present embodiment, the refractory heat insulating material 28 and the reflector 16 are fixed to the outdoor side of the folded steel plate material 9 (or the frame body 2 not shown) of the wall panel 1 by a screwing fixture 4 such as a tapping screw. Has been.
A large number of grooves formed on the outdoor side by the upper flange 10 and the web 11 and the lower flange 12 of the steel folded plate material 9 are closed by the refractory heat insulating material 28, and a plurality of horizontally long grooves having a heat insulating and heat retaining action. Air space portions 18 are formed at equal intervals in the vertical direction.

As shown in FIGS. 7 and 8, on the outside of the reflector plate 16, a plurality of square pipe-shaped steel ventilation trunk edges 19a made of steel square steel pipes or the like are vertically oriented at equal intervals in the lateral direction. It is arranged to extend to. Each steel ventilation trunk edge 19a is fixed to each vertical frame member 3 by a screwing fixing tool 4 such as a tapping screw.
Moreover, the exterior material 20 which consists of a fiber reinforced cement board etc. is being fixed to the outer side of each steel ventilation trunk edge 19a with the screwing fixing tool 4, such as a tapping screw, with respect to each steel ventilation trunk edge 19a. .

As each steel ventilation trunk edge 19a, for example, a square steel pipe having a thickness of about 75 mm × 16 mm and a thickness of about 2.4 mm can be used. Further, as the exterior material 20, for example, a plate having a plate thickness of about 12 mm can be used.

The reinforced gypsum board 34 on the indoor side of each vertical frame member 3 is fixed to the frame body 2 by a screw fixing fixture 4 such as a tapping screw.
As the reinforced gypsum board 34, a combination of the lower reinforced gypsum board 21 and the upper reinforced gypsum board 22 may be adopted. As described above, when two sheets of the reinforced gypsum board 21 and the reinforced gypsum board 22 are used, the lower reinforced gypsum board 21 having a thickness of about 15 mm is used as a lower material by a screwing fixing tool 4 such as a tapping screw. Further, the upper reinforcing gypsum board 22 having a thickness of about 12.5 mm may be fixed to the frame 2 by the screwing fixing tool 4 on the indoor side of the lower reinforcing gypsum board 21.

As described above, the refractory heat insulation structure 30 of the present embodiment includes the plurality of steel ventilation trunk edges 19 a arranged on the surface 29 of the reflector plate 16 at intervals. And the heat insulating material 31 is arrange | positioned between each steel ventilation trunk edges 19a.
According to this configuration, the heat insulating material 31 is not stacked on each steel ventilation trunk edge 19a, but the heat insulating material 31 is provided in the space between the steel ventilation trunk edges 19a. The thickness of the heat insulating structure 30 can be reduced. Therefore, it is possible to ensure the heat insulation in the normal time when no fire is generated without increasing the thickness of the fireproof heat insulating structure 30.

[Fourth Embodiment]
As shown in FIG. 10, the fireproof heat insulating structure 330 of the present embodiment includes a fireproof heat insulating material (first heat insulating material) 328 made of a rock wool plate having a plate shape and fire resistance, and a paper surface of the fireproof heat insulating material 328. And a reflecting plate 316 that is overlapped so as to cover all of the upper surface 328a.
The reflector 316 is fixed by a plurality of screwing fasteners 304 such as drill screws in a state where the back surface 329a is in contact with the surface 328a of the refractory heat insulating material 328.

The fireproof heat insulating material 328 has a self-extinguishing property at a high temperature of 300 ° C. or higher. Self-extinguishing here refers to the property of burning while exposed to flame, but extinguishing naturally when separated from the flame, and is specifically defined in JIS K 6911. Refers to the method A. That is, after a test piece corresponding to the above-mentioned refractory heat insulating material 328 is burned close to a flame, the flame is moved away. Then, when the burning of the test piece disappears within 180 seconds and the burned length is 25 mm or more and 100 mm or less, it is defined as “self-extinguishing”. As the fireproof heat insulating material 328 having such a self-extinguishing property, the above-mentioned rock wool plate is preferable because it is inexpensive, but other than the rock wool plate, for example, a ceramic board or the like can be used.

As the reflection plate 316, for example, a thin steel plate or the like can be used. When the thickness of the reflecting plate 316 is 0.4 mm or less, the weight can be reduced as compared with the case where the thickness is 0.5 mm or more. As a result, it contributes to the weight reduction of the fireproof heat insulating structure 330, and the workability at the time of installing this improves, so it is preferable. The lower limit of the thickness of the reflecting plate 316 is preferable, but practically, it is preferable to set the thickness to 0.1 mm or more and 0.23 mm or less in consideration of workability when the reflecting plate 316 is handled. .
Therefore, the thickness of the reflecting plate 316 is preferably within the range of 0.1 mm or more and 0.4 mm or less from the practical viewpoint.

The infrared reflectance of the surface 329 of the reflecting plate 316 is 0.4 or more and 1.0 or less, more preferably 0.8 or more and 0.95 or less. This is because when the infrared reflectance is less than 0.4, the reflection performance can hardly be exhibited, and when it exceeds 0.95, its production becomes extremely difficult.
In order to set the infrared reflectance of the surface 329 of the reflecting plate 316 to 0.4 or more and 1.0 or less, for example, when a thin steel plate is employed, the surface thereof may be polished, and thereby the infrared reflectance is set to 0. It can be about 86. In addition, the surface 329 of the reflection plate 316 can be plated, or a metal foil such as a stainless steel foil can be attached. In this case, the infrared reflectance can be improved from about 0.8 to 0.95.

FIG. 11 shows a cross-sectional view when the fireproof and heat insulating structure 330 of the present embodiment is applied to a wall (fireproof and heat insulating wall) 400 of a house (building structure) shown in FIG.
As shown in FIG. 11, in the wall body 400 of the present embodiment, a fireproof heat insulating material 328 is disposed on the outer surface side (outdoor side) of the housing 315, and a reflecting plate 316 is overlaid, and then these are attached to a drill screw or the like. A plurality of screwing fasteners 304 are penetrated and fixed to a support member (not shown) provided on the housing 315. In addition, although the case where this fireproof heat insulation structure 330 is used for a house is illustrated in this embodiment, you may apply to the inner wall (not shown) of a tunnel other than this, for example.

In the wall body 400, when a fire occurs outdoors, the effect of suppressing heat from being transmitted to the refractory heat insulating material 328 by reflecting the radiant heat due to the fire by the surface 329 of the reflector 316, that is, high infrared reflectivity. Can be demonstrated.
In addition, since the reflection plate 316 is overlaid on the refractory heat insulating material 328 alone and then attached with the screw fixing tool 304, the structure is simple and easy to manufacture, and an inexpensive refractory heat insulating structure 330 can be provided. it can.

The effects of the present embodiment having the above-described configuration are summarized below.
The fireproof heat insulating structure 330 of the present embodiment includes a plate-like fireproof heat insulating material 328 having fire resistance, and a reflecting plate 316 that covers a surface 328a that is one surface of the fireproof heat insulating material 328.
According to this configuration, when a fire occurs on the side of the reflecting plate 316 facing the surface 329, the heat (infrared rays) from the fire is reflected by the reflecting plate 329 and exhibits its flame shielding performance and high infrared reflecting performance. I can do it. As a result, the amount of heat transferred to the refractory heat insulating material 328 can be extremely reduced, so that the refractory heat insulating property inherent to the refractory heat insulating material 328 can be effectively exhibited.
Furthermore, the structure is simple and easy to manufacture, and an inexpensive fireproof and heat insulating structure can be constructed.

Moreover, in the fireproof heat insulation structure 330 of this embodiment, the fireproof heat insulating material 328 has a self-extinguishing property under high temperature of 300 degreeC or more.
According to this configuration, even if the refractory heat insulating material 328 is exposed to a high temperature of 300 ° C. or higher due to heat transfer accompanying the occurrence of a fire, if it is separated from the flame, it exhibits its self-extinguishing properties and does not burn. Therefore, when this fireproof heat insulating structure 330 is mounted on the fireproof heat insulating material 328 to the housing 315 for which fire resistance is required, even if the fireproof heat insulating material 328 is heated by the heat from the fire, its self-extinguishing property is reduced. Since it does not burn and burns, the housing 315 can be more reliably protected.

Moreover, in the fireproof heat insulation structure 330 of this embodiment, the infrared reflectance of the surface 329 of the reflecting plate 316 is 0.4 or more and 1.0 or less.
According to this configuration, by setting the infrared reflectance to be in the range of 0.4 or more and 1.0 or less, infrared rays from the flame can be efficiently reflected, so that the amount of heat transfer to the refractory heat insulating material 328 is suppressed. The temperature rise can be more reliably suppressed.

The wall body 400 of the present embodiment includes a housing 315 that is a plate-like strength member, and a fireproof and heat insulating structure 330 provided to overlap the housing 315.
According to this wall body 400, the fireproof heat insulating property that the fireproof heat insulating material 328 originally has can be effectively exhibited. Therefore, it is possible to prevent the casing 315 from being heated by the heat of the fire and falling short of strength.
Furthermore, since the said house which is a building structure of this embodiment is provided with the said wall body 400, it can exhibit the outstanding fireproof heat insulation.

[Fifth Embodiment]
A fifth embodiment of the present invention will be described below with reference to FIGS. 13 and 14. In the following description, differences from the fourth embodiment will be mainly described, and the description of the other parts is omitted because it is the same as the configuration of the fourth embodiment.
As shown in FIGS. 13 and 14, in the fireproof and heat insulating structure 330A of the present embodiment, the reflector 316 having a large surface area is not used alone, but a plurality of reflectors 316 are arranged in the horizontal direction or the vertical direction. The form in the case of arrangement is shown.

That is, as shown in FIG. 13, hooks (V-shaped or U-shaped) are engaged with the edges of the reflecting plates 316 adjacent to each other when viewed in a cross section along the thickness direction thereof. A portion 332 is formed. As shown in FIG. 13, the engagement groove 332 a and the engagement piece 332 b in the engagement portion 332 of one reflection plate 316 are replaced with the engagement piece 332 b and the engagement groove in the engagement portion 332 of the other reflection plate 316. Overlap with the state engaged with 332a. Thereafter, the respective engaging portions 332 engaged with each other are pressure-bonded toward the refractory heat insulating material 328, thereby forming an overlapping portion 332c having a spliced structure as shown in FIG.

As described above, the overlapping portion 332c is formed between the edge portions of the reflecting plates 316 adjacent in the vertical direction or the horizontal direction. Therefore, even if each edge part of each reflecting plate 316 is exposed to a fire, no gap is formed here, so that the flame shielding property and high infrared reflection property of the reflecting plate 316 can be sufficiently exhibited. As a result, the fireproof heat insulating material 328 can be protected and its fireproof performance can be sufficiently exhibited.
In addition, in the overlapping portion 332c, a configuration in which edges are simply overlapped may be employed instead of the spliced structure, but the spliced structure can more reliably obtain the fireproof and heat insulating performance. .

In the case where a plurality of fireproof heat insulating structures 330A are adjacent to each other to construct a fireproof heat insulating wall, for example, as shown in FIG. 15, the edge of one fireproof heat insulating material 328 and the fireproof heat insulating material 328 are provided. The extending direction 300A2 of the overlapping portion 332c intersects (that is, orthogonal to the front view) with respect to the extending direction 300A1 of the joint portion (joint portion) with the edge of the other adjacent refractory heat insulating material 328. Is preferred.

The effects of the present embodiment having the above-described configuration are summarized below.
In the fireproof and heat insulating structure 330 </ b> A of the present embodiment, the reflecting plate 316 is formed with an overlapping portion 332 c that overlaps with the edge of another reflecting plate 316 adjacent to the reflecting plate 316.
According to this configuration, a large reflector 316 having a relatively large surface area can be constructed by combining small reflectors 316 having a relatively small surface area. In addition, since the overlapping portion 332c is provided, it is possible to prevent a flame from entering from the overlapping portion 332c (a joint portion between the edges of the small reflector 316), and sufficient flame shielding performance and infrared high reflection performance. Can be demonstrated.

Moreover, in the fireproof and heat insulating structure 330A of the present embodiment, the overlapping portion 332c has a spliced structure.
According to this structure, since it is the connection by splicing, the flame approach from between the edge parts of each reflector 316 can be prevented more reliably.

In the fireproof heat insulating structure 330A of the present embodiment, the extension direction 300A1 of the joint between the edge of the fireproof heat insulating material 328 and the edge of another fireproof heat insulating material 328 adjacent to the fireproof heat insulating material 328 is used. Thus, the extending direction 300A2 of the overlapping portion 332c is orthogonal (intersect).
According to this configuration, since the overlap between the joining portion and the overlapping portion 332c can be minimized, it is possible to suppress the heat of the fire from being transmitted through the joining portion after passing through the overlapping portion 332c as much as possible. it can. Therefore, the fireproof and heat insulating performance of the fireproof and heat insulating structure 330A can be enhanced.

[Sixth Embodiment]
A sixth embodiment of the present invention will be described below with reference to FIGS. 16 and 17.
In the present embodiment, the wall panel 1 shown in FIGS. 9A to 9C is combined with the refractory heat insulating structure 330 described in the fourth embodiment, so that FIGS. As shown in FIG. The structure of the fireproof heat insulating wall 333 is suitable for use in, for example, a load bearing wall that has a thin and light weight structure and requires fireproof heat insulating performance. Since the wall panel 1 has already been described with reference to FIGS. 9A to 9C, the description thereof is omitted here.

As shown in FIG. 16 and FIG. 17, a refractory heat insulating material 328 is fixed to the outside (outdoor) of the folded steel plate material 9, and a reflector 316 is fixed to the outdoor side of the refractory heat insulating material 328. In addition, a plurality of steel ventilation trunk edges 319a and an exterior material 320 are attached to the outside of the reflection plate 316 in this order. In addition, as a ventilation trunk edge, in order to ensure higher living environment property, you may use the wooden ventilation trunk edge with low heat conductivity.
In addition, the fireproof heat insulating material 328 and the reflecting plate 316 may use a fireproof heat insulating panel with a reflecting plate integrated in advance. In this case, a refractory heat insulating material 328 may be attached to the reflecting plate 316 by a drill screw with a presser washer (not shown).

More specifically, in this embodiment, the refractory heat insulating material 328 and the reflector 316 are fixed to the outdoor side of the steel folded plate material 9 (or the frame body 2 not shown) of the wall panel 1 with screws such as tapping screws. It is fixed by the tool 304.
A large number of grooves formed on the outdoor side by the upper flange 10 and the web 11 and the lower flange 12 of the folded steel plate material 9 are closed by the refractory heat insulating material 328, and a plurality of horizontally long grooves having a heat insulating and heat retaining action. Air space portions 318 are formed at equal intervals in the vertical direction.

On the outside of the reflector 316, a plurality of square pipe-shaped steel ventilation trunk edges 319a made of a steel square steel pipe or the like are arranged so as to extend vertically at equal intervals in the horizontal direction. . Each steel ventilation trunk edge 319a is fixed to each vertical frame member 3 by a screw fixing fixture 304 such as a tapping screw.
In addition, an exterior member 320 made of a fiber reinforced cement board or the like is fixed to each steel ventilation cylinder edge 319a by a screw fixing fixture 304 such as a tapping screw on the outside of each steel ventilation cylinder edge 319a. .

As each steel ventilation trunk edge 319a, for example, a square steel pipe having a thickness of about 75 mm × 16 mm and a thickness of about 2.4 mm can be used. Further, as the exterior material 320, for example, a plate having a plate thickness of about 12 mm can be used.

The reinforced gypsum board 334 on the indoor side of each vertical frame member 3 is fixed to the frame body 2 by a screw fixing tool 304 such as a tapping screw.
In addition, as the reinforced gypsum board 334, a combination of the lower reinforced gypsum board 321 and the upper reinforced gypsum board 322 may be employed. As described above, when two sheets of the reinforced gypsum board 321 and the reinforced gypsum board 322 are used, the reinforced gypsum board 321 having a thickness of about 15 mm is used as a lower material by a screwing fixing tool 304 such as a tapping screw. Further, the upper reinforcing gypsum board 322 having a thickness of about 12.5 mm may be fixed to the frame 2 by a screwing fixing tool 304 on the indoor side of the lower reinforcing gypsum board 321.

Since the heating test was conducted using the fireproof heat insulating wall according to one embodiment of the present invention and the comparative example according to the prior art, the result will be described below. As a test body according to an embodiment of the present invention, the fire-resistant and heat-insulating wall 333 described below with reference to FIGS. 16 and 17 (hereinafter, fire-resistant and heat-insulating load-bearing wall 333) was used. Further, as a comparative example, the fireproof heat insulating wall 114 (hereinafter referred to as the fireproof heat insulating load bearing wall 114) described with reference to FIGS. 21 to 23 was used. The test body according to the present invention and the test body according to the comparative example have the same configuration except that the positions of the reflector 316 (116) and the refractory heat insulating material 328 (128) are interchanged.

[Test conditions]
Test conditions are shown below.
(1) Common conditions for the fireproof and heat resistant bearing wall 333 according to the present invention and the fireproof and heat resistant bearing wall 114 according to the comparative example are as follows:
Each vertical frame member 3 is a grooved steel with a lip formed by bending a thin steel plate having a plate thickness of 1.0 mm, and the dimension in the wall thickness direction is 89 mm. The upper and lower horizontal frame members 5 and 6 are formed by bending a thin steel plate having a plate thickness of 1.0 mm into a groove shape in the same manner as the vertical frame members 3, and the dimension in the wall thickness direction is 89 mm. is there.
On the indoor side of each vertical frame member 3, an underlay reinforced gypsum board 321 (121) having a thickness of 15 mm is fixed to the frame body 2 by a screw fixing fixture 304 (104) as an underlay material, and the underlay reinforced gypsum board 321 ( 121) on the indoor side, an upholstered reinforced gypsum board 322 (122) having a thickness of 12.5 mm is fixed to the frame body 2 by a screw fixing fixture 4. The pitch between the trunk edges 319a (119a) is 455 mm.
In addition, the fireproof heat insulating material 328 (128) used by both the fireproof heat insulation load-bearing wall 333 and the fireproof heat insulation load-bearing wall 114 consists of a rock wool board, and the board thickness is 40 mm. Moreover, as the reflecting plate 316 (116) made of a thin steel plate, a plate having a thickness of 0.11 mm was used.
In the fireproof heat insulating bearing wall 333 according to the present invention, the surface 329 of the reflector 316 is galvanized to have an infrared reflectance of 0.86. On the other hand, the outdoor surface of the reflecting plate 116 in the fireproof heat insulating load bearing wall 114 according to the comparative example was galvanized similarly to the reflecting plate 316, and the infrared reflectance was 0.86. Thus, by making each constituent material the same, the influence of the increase in fire resistance due to an increase in the constituent materials was eliminated.

(2) Conditions differing between the refractory heat-insulating load-bearing wall 333 according to the present invention and the fire-resistant heat-insulating load-bearing wall 114 according to the comparative example are as follows:
In the fireproof heat insulating load bearing wall 333 according to the present invention, a fireproof heat insulating material 328 and a reflector 316 made of a thin steel plate are arranged in this order from the indoor side. On the other hand, in the fireproof heat insulation load bearing wall 114 according to the comparative example, a reflector 116 made of a thin steel plate and a fireproof heat insulating material 128 are arranged in order from the indoor side.

[Evaluation method of test results]
A heating test was conducted on the fireproof and heatproof load-bearing wall 333 and the fireproof and heatproof load-bearing wall 114, and based on the results, evaluation was made on ensuring non-damage, heat shield, and flame shield.
In ensuring the non-damage, it was confirmed whether or not the temperature of the structural member (each vertical frame member 3) that supports the load of the building reaches about 450 ° C. That is, when the temperature of the structural member (each vertical frame member 3) reaches about 450 ° C., there is a concern that the strength of the steel material is reduced and the load cannot be supported. It is important to keep the temperature below ℃.
In securing the heat shielding property, it is required that the back surface temperatures (indoor side surface temperatures) of the fireproof heat insulation load bearing wall 333 and the fireproof heat insulation load bearing wall 114 be suppressed to room temperature + 140 ° C. or lower on average and to room temperature + 180 ° C. or lower at maximum.
In order to ensure the flame barrier properties, it is required to prevent a flame of 10 seconds or more from being ejected from a gap such as a crack to the back side of the fireproof and heatproof load-bearing walls 333 and 114.

[Test results]
The test results are shown in FIG.
FIG. 18 shows a room according to a standard heating curve (fire reaching 945 ° C. in 1 hour (ISO834) stipulated in the Building Standards Law) for each of the fireproof heat insulation loadproof wall 333 and the fireproof heat insulation loadproof wall 114. It is the test result which confirmed the fire resistance performance for 1 hour by heating from the outside for 1 hour, and then stopping heating and seeing progress for 3 hours. In FIG. 18, a dotted line is drawn at a temperature of 450 ° C. indicating the collapse temperature (allowable maximum temperature) of the vertical frame member 3.

As shown by a dotted line in FIG. 18, in the case of the fireproof heat insulating bearing wall 114 according to the comparative example, the temperature of the vertical frame member 3 is about 420 ° C. at the maximum 65 minutes after the start of heating (5 minutes after the end of heating). Reached. Therefore, although it was possible to ensure fire resistance performance for 1 hour, it was confirmed that there was only room for 30 ° C.
On the other hand, as shown by the one-dot chain line in FIG. 18, in the refractory heat-insulating load-bearing wall 333 according to the present invention, the temperature of the vertical frame member 3 is about 270 at the maximum 65 minutes after the start of heating (5 minutes after the end of heating). ° C. Therefore, it was confirmed that the fire resistance performance for 1 hour can be sufficiently secured. In addition, the temperature of the vertical frame member 3 is reduced by about 150 ° C. compared to the fireproof heat-insulating load-bearing wall 114 of the comparative example, and the temperature of the structural member (vertical frame member 3) is much higher than that of the comparative example. It was confirmed that it could be suppressed.

Therefore, the fireproof heat insulating bearing wall 333 according to the present invention significantly improves the fireproof performance only by replacing the position of the reflector 316 outside the fireproof heat insulating material 328 as compared to the fireproof heat resistant bearing wall 114 according to the comparative example. It was confirmed that it was possible.
If the reflectance is 0.4, it becomes as shown by a two-dot chain line in FIG. 18, and although it is less effective than the reflectance of 0.86, an improvement in fire resistance can be expected.

In the case of the fireproof heat insulating load bearing wall 333 according to the present invention, the exterior material 320 or the exterior material 320 heated by the outdoor fire when a fire occurs on the outdoor side by plating the surface of the reflector 316 is plated. The infrared ray of the fire that leaks through the joint gap is reflected, and the temperature rise of the vertical frame member 3 located on the indoor side of the reflector 316 can be remarkably suppressed. Therefore, fire resistance performance for 1 hour can be easily ensured.
As described above, in order to increase the infrared reflectance of the outdoor side, the surface 329 of the outdoor side of the reflector 316 is coated with a metal plating such as galvanization, or provided with a metal foil such as a stainless steel foil, or a polishing process. As a result, the reflectance can be easily increased to 0.4 or more and 1.0 or less. In practice, the reflectance can be increased to 0.8 or more.

In addition, in the case of the refractory heat-insulating load-bearing wall 114 according to the comparative example, the reflector 116 is disposed outside the steel folded plate material 109, and the refractory insulator 128 is disposed outside the reflector 116. Therefore, the heat from the outdoor fire is heated in addition to the heat conduction by the high-temperature air that has entered between the steel ventilation trunk edges 119a and the heat conduction through the exterior material 120 and the steel ventilation trunk edges 119. The fireproof heat insulating material 128 is heated by infrared rays of fire that leaks from the joint gaps of the material 120 and the exterior material 120. Furthermore, the heat from the refractory heat insulating material 128 is transmitted to the vertical frame member 103 through the reflecting plate 116 and the steel folded plate member 109.

In the case where a heat insulating material made of extruded polystyrene foam is provided on the surface of the reflector 116 as a heat insulating material for ensuring the living environment related to the living environment temperature, and the fire resistance test similar to the above is performed, the extruded polystyrene foam Is a material that softens at 100 ° C. or lower, and is expected to melt easily at a high temperature of 100 ° C. or higher. In this case, since the extruded polystyrene foam hardly remains on the surface of the reflecting plate 116, the infrared reflectivity and the total infrared reflection amount of the reflecting plate 116 are not reduced.

In addition, since the infrared reflection function cannot be expected when the surface temperature of the reflector 116 is 400 ° C. or higher, the above-mentioned living environment is ensured at a temperature of 400 ° C. or lower, preferably 200 ° C. or lower, more preferably 100 ° C. It is preferable that the heat insulating material for melting and burning disappears and the surface 129 of the reflector 116 is exposed.
Further, the thickness of the reflecting plate 116 is preferably 0.4 mm or less, preferably 0.23 mm or less, and more preferably about 0.1 mm from the viewpoint of weight reduction and cost reduction.

According to the present invention, the fireproof heat insulation material that is inherently provided by the fireproof heat insulating material is effectively exhibited, the fireproof performance is not easily lost even for a long-time fire, and the fireproof heat insulating structure having high fireproof performance at low cost, It is possible to provide a fireproof heat insulating wall provided with the fireproof heat insulating structure and a building structure using the fireproof heat insulating wall.

28,328 1st heat insulating material (fireproof heat insulating material)
16,316 Reflector 29,329 Reflector surface 31,331 Second heat insulating material (heat insulating material)
30, 30A, 330 Refractory heat insulation structure 19a, 319a Copper ventilation trunk edge (trunk edge)
32c, 332c Overlapping part A1, 300A1 Extending direction of joined part A2, 300A2 Extending direction of overlapping part 23, 24, 315 Housing (plate-shaped strength member)
200, 250, 400 fireproof insulation wall

Claims (16)

1. A plate-shaped, fire-resistant first heat insulating material;
   A reflector covering at least one surface of the first heat insulating material;
   A second heat insulating material covering the surface of the reflector and having a melting point lower than that of the first heat insulating material;
   A fireproof and heat insulating structure characterized by comprising:
2. The fireproof heat insulating structure according to claim 1, wherein the melting point of the second heat insulating material is 50 ° C or higher and 100 ° C or lower.
3. A plurality of trunk edges spaced apart from each other on the surface of the reflector;
   The second insulation is disposed between the body edges;
   The fireproof and heat insulating structure according to claim 1.
4. The fireproof heat insulating structure according to claim 1, wherein the first heat insulating material has a self-extinguishing property at a high temperature of 300 ° C or higher.
5. 2. The fireproof heat insulating structure according to claim 1, wherein an infrared reflectance of the surface of the reflector is 0.4 or more and 1.0 or less.
6. The fireproof heat insulating structure according to claim 1, wherein the reflecting plate is provided with an overlapping portion that overlaps with an edge of another reflecting plate adjacent to the reflecting plate.
7. The fireproof heat insulating structure according to claim 6, wherein the overlapping portion has a splicing structure.
8. The extending direction of the overlapping portion intersects the extending direction of the joint portion between the edge portion of the first heat insulating material and the edge portion of the other first heat insulating material adjacent to the first heat insulating material. The fireproof and heat insulating structure according to claim 1, wherein
9. A fire-resistant and heat-insulating structure characterized by comprising a plate-like first heat-insulating material having fire resistance and a reflecting plate covering at least one surface of the first heat-insulating material.
10. The fireproof heat insulating structure according to claim 9, wherein the first heat insulating material has self-extinguishing properties at a high temperature of 300 ° C or higher.
11. 10. The fireproof heat insulating structure according to claim 9, wherein the infrared reflectance of the surface of the reflector is 0.4 or more and 1.0 or less.
12. 10. The fireproof and heat insulating structure according to claim 9, wherein the reflecting plate is provided with an overlapping portion that is overlapped with an edge of another reflecting plate adjacent to the reflecting plate.
13. The fireproof heat insulating structure according to claim 12, wherein the overlapping portion has a splicing structure.
14. The extending direction of the overlapping portion intersects the extending direction of the joint between the edge of the first heat insulating material and the edge of the other first heat insulating material adjacent to the first heat insulating material. The fireproof and heat insulating structure according to claim 12, wherein
15. A fire-resistant and heat-insulating wall, comprising: a plate-like strength member; and the fire-resistant and heat-insulating structure according to any one of claims 1 to 14 provided to overlap the strength member.
16. A building structure comprising the fireproof and heat insulating wall according to claim 15.

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