JP2020073782A - Shell structure of panel structure body, and panel structure body with the shell structure - Google Patents

Abstract

To provide a panel structure body that is lightweight with excellent strength, heat insulation, and sound insulation properties, and in particular, can be used as a substitute for conventional ECP and ALC panels.SOLUTION: A panel structure (10) including a core panel (1) containing a first ceramics and a first fiber, two reinforcing panels (3, 3') respectively arranged on both sides of the core panel (1), and a shell (2) including a second ceramics and a second fiber and composed of the core panel (1) and the two reinforcing panels (3, 3') embedded.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a panel structure, particularly a panel structure that can be used as a building material.

  As a building material, for example, a precast concrete panel or the like is known, in which a reinforcing material such as a reinforcing bar and a mesh reinforcing bar is arranged in a formwork, and concrete is cast from the upper side thereof (for example, Patent Document 1). ).

  Further, conventionally, ECP, ALC panels, etc. are generally well known as lightweight concrete building materials that do not use reinforcing materials such as reinforcing bars and mesh reinforcing bars.

  An ECP (extruded cement panel) is an autoclave-cured panel obtained by extrusion molding a cement, a siliceous raw material, and a fibrous raw material as main raw materials into a hollow plate. The ECP is mainly used as an outer wall and a partition wall.

  An ALC panel (autoclaved lightweight aerated concrete panel) is an autoclave-cured panel obtained by foaming cement, silica stone, quicklime, and aluminum powder as main raw materials. ALC panels are mainly used as outer walls, partition walls, roofs and floors of steel-framed buildings.

Japanese Patent Laid-Open No. 10-140697

  The precast concrete panel has a problem that the specific gravity of the concrete is 2.4 and the reinforcing bars such as rebars and mesh rebars are included, so that an increase in the weight thereof cannot be avoided.

  On the other hand, the ECP and ALC panels are lightweight and have excellent strength, but since they are manufactured by extrusion molding, they lack flexibility in designing the panel shape. In addition, these panels were developed more than 40 to 50 years ago and are even lighter than these panels, and have the same or higher strength, and also have the performance of heat insulation and sound insulation. It is desired to develop an alternative product that also has

  Therefore, the present invention provides a panel structure that is lightweight and has excellent strength, heat insulation, sound insulation, and the like, and particularly a panel structure that can be used as a substitute for conventional ECP and ALC panels. It is an issue.

  That is, the present invention is as described in (1) to (12) below.

  (1) An outer skin structure of a panel structure including an outer skin in which a core panel is embedded, wherein reinforcing panels are respectively arranged on both surfaces of the core panel, and the outer skin containing ceramics and fibers is used to form the core panel and the two reinforcing panels. The outer structure of the panel structure, which is formed by embedding the outer surface of the panel.

  (2) The outer skin structure of the panel structure according to (1), wherein the fibers contained in the outer skin are one or more fibers selected from the group consisting of organic fibers and inorganic fibers.

  (3) The fibers contained in the outer coat are polyvinyl alcohol fibers (vinylon fibers) which are organic fibers, polyolefin fibers and aramid fibers, and steel fibers, stainless fibers, carbon fibers and glass fibers which are inorganic fibers. The outer cover structure of the panel structure according to (2), which is one or more fibers selected from the group.

  (4) The outer skin structure of the panel structure according to any one of (1) to (3), wherein the ceramic contained in the outer skin is an inorganic compound or cement (hardened body).

  (5) The outer cover structure of the panel structure according to any one of (1) to (4), wherein the outer cover is porous.

  (6) The outer skin structure of a panel structure according to any one of (1) to (5), wherein the outer skin embeds the outer surfaces of the core panel and the two reinforcing panels with substantially the same thickness.

  (7) The panel structure according to any one of (1) to (6), wherein the outer cover has, on at least two side surfaces, a convex portion and a concave portion that can be engaged with each other in correspondence with each other. Hull structure.

  (8) The outer cover structure of the panel structure according to any one of (1) to (7), wherein the reinforcing panel is made of metal.

  (9) The outer cover structure of the panel structure according to (8), wherein the reinforcing panel is a plated steel plate.

  (10) The outer cover structure of the panel structure according to any one of (1) to (9), wherein the core panel is porous.

  (11) A panel structure provided with the outer skin structure according to any one of (1) to (10).

  (12) The panel structure according to (11), which is used as a wall material.

  According to the present invention, it is possible to provide a panel structure that is lightweight and has excellent strength, heat insulating properties, sound insulating properties, and the like, and an excellent appearance as required. In addition, according to the present invention, it is possible to provide a panel structure that can be used as a substitute for the conventional ECP, ACL panel, particularly the conventional ALC panel.

It is a schematic perspective view which shows the panel structure of the 1st Embodiment of this invention. It is a schematic sectional drawing in A-A 'of the panel structure body of 1st Embodiment shown in FIG. It is a schematic diagram showing in section a manufacturing method of a panel structure of a 1st embodiment of the present invention. It is a schematic sectional drawing of the panel structure of the 2nd Embodiment of this invention. It is a schematic perspective view of the panel structure of the 3rd Embodiment of this invention (a), and schematic sectional drawing in B-B '(b). It is a schematic sectional drawing of the decorative panel structure of the 4th Embodiment of this invention.

<First Embodiment>
A panel structure 10 according to a first embodiment of the present invention is shown in FIGS. Here, the present invention is not limited to the illustrated embodiments.

  The panel structure 10 includes a core panel 1, two reinforcing panels 3 and 3 ′ arranged on both sides of the core panel 1, and the core panel 1 and the two reinforcing panels 3 and 3 ′ embedded (or The outer skin 2 formed by coating or embedding).

[Core panel]
The core panel 1 includes at least a first ceramic and a first fiber. The shape of the core panel 1 is not particularly limited as long as it is a plate shape, but is preferably a rectangular parallelepiped from a geometrical and mechanical viewpoint.

  The length of the core panel 1 in the longitudinal direction is not particularly limited and is, for example, 1000 mm to 5000 mm, preferably 1800 mm to 2800 mm.

  The length in the width direction (direction perpendicular to the longitudinal direction) of the core panel 1 is not particularly limited and is, for example, 600 mm to 2400 mm, preferably 900 mm to 1200 mm.

  The thickness of the core panel 1 is not particularly limited and is, for example, 75 mm to 150 mm, preferably 100 mm to 125 mm.

  As the first ceramic, a solid material that can be composed of an inorganic non-metal substance can be arbitrarily selected and included, and examples thereof include inorganic compounds such as carbides, nitrides, and borides, and cement (cured body). Be done.

  Examples of the first fiber include organic fiber (for example, polyvinyl alcohol fiber (vinylon fiber), polyolefin fiber such as polypropylene fiber and polyethylene fiber, aramid fiber, etc.) and inorganic fiber (for example, steel fiber, stainless fiber, carbon fiber, It may include one or more fibers selected from the group consisting of glass fibers and the like).

  The length of the first fiber is not particularly limited and is, for example, in the range of 1 to 150 mm, preferably 1 to 120 mm, more preferably 6 mm to 40 mm. The thickness is not particularly limited and is usually 1 μm to 2000 μm, preferably 10 μm to 1000 μm.

  The content of the first fiber in the core panel 1 is, for example, 0.1% by weight to 5% by weight, preferably 0.1% by weight to 1% by weight, based on the total weight of the core panel 1.

  In the present embodiment, at least the above-mentioned first ceramics and first fibers are mixed and shaped according to a method known in the art according to the types of ceramics and fibers, and then, for example, firing and heating. The core panel 1 can be produced by curing, curing, and solidifying by drying.

  The core panel 1 may be porous for the purpose of reducing its weight. In the present specification, the term "porous" means that the core panel contains bubbles such as closed cells and / or open cells inside the core panel using a foaming agent or a foaming agent. When the core panel 1 is porous, its specific gravity (specific gravity with respect to water) is, for example, preferably 0.5 to 2.0, and more preferably 0.8 to 1.2.

  The core panel 1 may further include a resin foam for the purpose of reducing its weight. When the core panel 1 includes a resin foam, the core panel 1 may be porous or may not be porous as described above.

  As the resin foam, a foam of a natural or synthetic thermoplastic resin can be used without particular limitation. For example, styrene resin such as polystyrene, olefin resin such as polypropylene and polyethylene, acrylonitrile-styrene copolymer, copolymer such as styrene-ethylene copolymer, polyvinyl chloride, polyvinyl chloride such as polyvinylidene chloride. Examples thereof include resin foams.

  The expansion ratio of the resin foam itself is not particularly limited and is, for example, 3 times to 200 times, preferably 30 times to 150 times, and more preferably 50 times to 150 times.

  The spherical diameter of the resin foam is not particularly limited and is, for example, 1 mm to 10 mm, preferably 2 mm to 6 mm, more preferably 3 mm to 5 mm.

  The content of the resin foam is, for example, 0.1% by weight to 10% by weight, preferably 2% by weight to 8% by weight, based on the total weight of the core panel 1.

  When the core panel 1 contains a resin foam, the specific gravity (specific gravity with respect to water) of the core panel 1 is, for example, 0.1 to 0.8, preferably 0.1 to 0.6, and more preferably 0.1 to 0. It is 4.

  Hereinafter, the case where the core panel 1 contains cement as the first ceramics will be described in detail as an example, but the present invention should not be construed as being limited to such an example.

  Examples of the cement include Portland cement (JIS R 5210) defined by Japanese Industrial Standards (hereinafter JIS) (for example, ordinary Portland cement, early strength Portland cement, super early strength Portland cement, moderate heat Portland cement, low heat Portland cement). , Sulfate resistant Portland cement, white Portland cement, etc., mixed cement (for example, blast furnace cement (JIS R 5211), silica cement (JIS R 5212), fly ash cement (JIS R 5213), etc., ecocement (JIS R 5204), ultra rapid hardening cement, cement for grout, oil well cement, low exothermic cement and the like can be used without particular limitation.

  When the core panel 1 uses cement as the first ceramics, the inside of the core panel 1 mainly contains a hardened cement and a first fiber obtained by reacting the cement with an appropriate amount of water. Can be Thus, the core panel 1 may be molded as a cement hardened body containing at least the first fiber.

  In the case where the core panel 1 is made porous, a foaming agent that is generally well known to the above-mentioned cement, for example, for cement, for mortar, for concrete, and more specifically, a protein-based foaming agent, Surfactant-based foaming agents such as polyethers, aromatic sulfonates (alkylbenzene sulfonates, etc.), sulfur-containing compounds (higher alkyl ether sulfates, etc.), resin-based foaming agents, etc. By blending, the core panel 1 may be made porous. In this way, the core panel 1 may be molded as a foamed cement hardened body containing at least the first fiber.

  Examples of the method for adding the foaming agent include preforming, mix forming, after forming, and the like, and preforming can be typically applied.

  Furthermore, if necessary, a metallic foaming agent such as aluminum powder may be used together with the foaming agent. In addition, in this embodiment, the amounts of the foaming agent and the foaming agent used are not particularly limited.

The above-mentioned cement further includes, for example, fine aggregate such as pearlite (for example, containing components such as SiO ₂ , Al ₂ O ₃ , Fe ₂ O ₃ , CaO, and Na ₂ O), admixture, and water reducing agent ( For example, an additive such as a naphthalene-based water reducing agent, a sulfonic acid-based water reducing agent, or a polycarboxylic acid-based water reducing agent) may be added as necessary. In this embodiment, the amount of the additive used is not particularly limited.

[Reinforcement panel]
The reinforcing panels 3, 3'may be the same or different and can be arranged on at least both sides of the core panel 1, respectively. As a result, the strength of the core panel 1, and thus the panel structure 10, such as bending strength, can be improved.

  The reinforcing panels 3, 3 ′ are not particularly limited in size and shape as long as they can be arranged on both sides of the core panel 1, but preferably have a main surface having the same area as the main surface of the core panel 1.

  The thickness of the reinforcing panels 3 and 3'is not particularly limited, and is, for example, 50 µm to 3000 µm, more preferably 50 µm to 300 µm.

  As the reinforcing panels 3 and 3 ', for example, a metallic or non-metallic panel or the like can be used. Examples of the metal panel include a metal plate made of a metal such as iron, aluminum, copper, titanium, molybdenum, or chromium, or an alloy thereof (for example, steel or stainless steel). Examples of the non-metal panel include carbon fiber reinforced plastic (CFRP), glass fiber reinforced plastic (GFRP), pultrusion fiber reinforced plastic (PFRP), kepra fiber reinforced plastic (KFRP), and aramid fiber reinforced plastic (AFRP). Panels made of fiber reinforced plastic (FRP) such as Especially, it is preferable to use a metal panel, and it is particularly preferable to use a steel plate.

  When the reinforcing panels 3 and 3'are made of metal, their surfaces may be subjected to plating treatment (for example, molten (or immersion) plating, electroplating, etc.) from the viewpoint of corrosion prevention. It is possible to use galvanized steel sheets that have been galvanized or electrogalvanized, galvanized steel sheets, ZAM steel sheets, and other galvanized steel sheets.

  Further, the reinforcing panels 3, 3'may be punched metal obtained by punching the above-mentioned metal panel, or lath metal processed in a mesh shape.

  In this embodiment, the reinforcing panels 3 and 3 ′ are preferably physically and / or chemically fixed to the surface of the core panel 1. For example, adhesives (for example, vinyl acetate-acrylic, styrene-acrylic, ethylene-vinyl acetate, styrene-butadiene, nitrile rubber, chloroprene rubber, modified silicone, cyanoacrylic, urethane, epoxy) , Phenol-based, melamine-based, urea-based, polyamide-based, nitrocellulose-based, polyvinyl alcohol-based, polyester-based adhesives, etc.), the reinforcing panels 3, 3 ′ can be fixed to the surface of the core panel 1.

[Hull]
The outer skin 2 contains at least the second ceramics and the second fiber, and if the core panel 1 and the reinforcing panels 3 and 3 ′ can be embedded (or covered or embedded) and included, the size and The shape is not particularly limited. As shown in FIG. 1, it is preferable that the outer skin 2 embeds the outer surfaces of the core panel 1 and the reinforcing panels 3 and 3 ′ with substantially the same thickness. Further, from the viewpoint of geometry and dynamics, a rectangular parallelepiped is preferable. When the outer cover 2 is a rectangular parallelepiped, its peripheral edge portion, particularly the longitudinal peripheral edge portion, may be chamfered as necessary.

The skin 2 is particularly limited to the thicknesses L ₁ (upper surface side) and L ₂ (lower surface side) (see FIG. 2) that embed the core panel 1 and the reinforcing panels 3 and 3 ′ provided on both surfaces thereof. However, each is, for example, 10 mm to 50 mm, preferably 10 mm to 30 mm, and may be the same or different from each other.

  The outer skin 2 may be porous or may not be porous. Whether or not the outer cover 2 is made porous can be appropriately determined according to the application. For example, it may be porous if the panel structure needs to be lightweight.

  In order to make the outer skin 2 porous, bubbles such as closed cells and / or open cells may be formed inside the outer skin 2 by using the above-mentioned foaming agent and foaming agent. When the outer cover 2 is made porous, its specific gravity (specific gravity with respect to water) is, for example, 0.1 to 2.2, preferably 0.5 to 1.9, and more preferably 0.7 to 1.9. ..

  As the second ceramic, the same material as the first ceramic can be used. In the present embodiment, the second ceramic may be the same as or different from the first ceramic described above.

  The second fibers can include one or more fibers selected from the group consisting of organic fibers and inorganic fibers similar to the first fibers described above. In the present embodiment, the second fiber may be the same as or different from the first fiber described above.

  The length and thickness of the second fiber are not particularly limited, and may be, for example, within the same range as the first fiber.

  The content of the second fiber in the outer cover 2 is, for example, 0.1% by weight to 10% by weight, preferably 0.1% by weight to 5% by weight, based on the total weight of the outer cover 2.

  When the outer cover 2 is made porous, in order to improve the strength of the panel structure, a hard fiber such as steel fiber, carbon fiber or glass fiber is used as the second fiber, or the amount of the second fiber is increased. Can be increased.

  In the present embodiment, for example, a mold or the like is used, and inside the mold, the reinforcing panels 3 and 3'are arranged on both sides of the core panel 1 with proper positioning. A mixture containing at least the above-mentioned second ceramics and second fibers is injected into the mixture, and the mixture is subjected to, for example, firing, heating, curing or drying according to a method known in the art depending on the types of the ceramics and the fibers. Thus, the outer cover 2 can be formed by solidifying the outer cover 2.

  When the skin 2 uses cement as the second ceramics, the same material as the core panel 1 can be used.

<Performance evaluation>
The performance of the panel structure of the present invention, particularly the specific gravity, strength, heat insulation and sound insulation will be described.

-Regarding Specific Gravity The panel structure of the present invention has 0.3 to 1.2, preferably 0.5 to 1.0, and more preferably 0.6 to 0.8 by having the above-mentioned constitution and structure. A specific gravity (specific gravity with respect to water) can be achieved. Here, the specific gravity (specific gravity with respect to water) of the core panel is 0.1 to 0.8, preferably 0.1 to 0.6, and more preferably 0.1 to 0.4. Specific gravity) is 0.1 to 2.2, preferably 0.5 to 1.9, and more preferably 0.7 to 1.9.

-Regarding strength The panel structure of the present invention can achieve excellent bending strength and the like by having the above-mentioned constitution and structure. The flexural strength, for example, 1.0 N / mm ² or more, preferably 1.5 N / mm ² or more, more preferably 2N / mm ² or more. Such bending strength can be measured according to JIS A 1414-2.

-Adiabatic Property The panel structure of the present invention achieves a thermal conductivity of, for example, 0.17 W / m · K or less, preferably 0.1 W / m · K or less, by having the above-described configuration and structure. be able to. The lower limit of the thermal conductivity is not particularly limited as long as it exceeds 0 W / m · K. Such thermal conductivity can be measured according to JIS A 1412-2.

-Regarding Sound Insulation The panel structure of the present invention can have excellent sound insulation over the frequency range of 100 Hz to 8000 Hz, for example, by having the above configuration and structure. Particularly, the transmission loss at 1000 Hz is preferably 40 dB or more when the thickness of the panel structure is 100 mm, for example. Further, there is no limit on the upper limit of such transmission loss.

<Panel manufacturing method>
Hereinafter, as an example, a method for manufacturing the panel structure 10 according to the first embodiment of the present invention will be briefly described with reference to FIG. 3. The method for manufacturing the panel structure of the present invention is not limited to such a method.

(Process A)
Forming a mixture containing at least a first ceramic (or a precursor thereof) and a first fiber into a desired shape in a mold and, for example, firing, heating, curing or drying according to a conventionally known method. And solidify to form an ingot (lump) 1'of the core panel 1.

(Process B)
The core panel 1 is formed by slicing the ingot 1'to a desired thickness. In addition, in the step A, when the ingot 1'is molded with the size of the core panel 1, the step B can be omitted.

(Process C)
Reinforcing panels 3, 3'are arranged on both sides of the core panel 1, respectively. Preferably, it is physically and / or chemically fixed.

(Process D)
The core panel 1 on which the reinforcing panels 3 and 3'are arranged is arranged, for example, at an appropriate position in the mold, and the mixture containing at least the second ceramic (or its precursor) and the second fiber is arranged in the mold. Then, the panel structure 10 can be obtained by injecting into the above and solidifying it by baking, heating, curing and drying according to a conventionally known method to form the outer skin 2.

<Second Embodiment>
FIG. 4 is a schematic sectional view of the panel structure 20 according to the second embodiment of the present invention. The panel structure 20 includes a core panel 21 and an outer skin 22 obtained by embedding (or covering or embedding) the core panel 21. In addition, in the present embodiment, the last digit of the reference numeral of the component that is almost the same as that of the first embodiment is the same number as that of the first embodiment. That is, the core panel 21 and the outer cover 22 can correspond to the core panel 1 and the outer cover 2 in the first embodiment, respectively, and the above-described description applies to almost all of them. Therefore, detailed description of the same contents will be omitted, and only the differences from the first embodiment will be described below.

  The panel structure 20 does not include the reinforcing panel used in the first embodiment. Therefore, for the purpose of improving the strength of the panel structure 20, it is preferable that the first fibers contained in the core panel 21 are hard fibers such as steel fibers, carbon fibers, and glass fibers.

<Third Embodiment>
FIG. 5 shows a perspective view (a) and a sectional view (b) taken along the line BB ′ of the panel structure 30 according to the third embodiment of the present invention. The panel structure 30 includes a core panel 31 and reinforcing panels 33 and 33 'arranged on both surfaces of the core panel 31 (see (b) of FIG. 5). In this embodiment, the last digit of the reference numeral of the component that is substantially the same as that of the first embodiment is the same number as that of the first embodiment. This point is the same as in the second embodiment. That is, the core panel 31 and the reinforcing panels 33 and 33 ′ can correspond to the core panel 1 and the reinforcing panels 3 and 3 ′ in the first embodiment, respectively, and the above-described description is applied to almost all of them. Therefore, detailed description of the same contents will be omitted, and only the differences from the first embodiment will be described below.

  In the panel structure 30, the outer skin 32 may correspond to the outer skin 2 of the first embodiment described above, but at least two outer skins 32 are provided as shown in FIGS. A convex portion 34 and a concave portion 35 are formed on the side surface (for example, two longitudinal side surfaces). In FIG. 5B, the convex portion 34 and the concave portion 35 are described as a ridge and a groove corresponding thereto, but in the present embodiment, the convex portion 34 and the concave portion 35 are limited to such shapes. However, it is sufficient that they have shapes capable of engaging with each other.

  By using two or more of the panel structure 30 having the convex portion 34 and the concave portion 35, the side surfaces of the panel structure 30 are simply engaged with each other, and a surface having a larger area (for example, Wall surface, floor surface) can be formed.

  The convex portion 34 and the concave portion 35 can be formed, for example, at the time of molding the outer cover 32 or by cutting the outer cover 32 after molding.

  In the panel structure 30, the size and shape of the outer cover 32 may be the same as those of the conventional ECP and ALC panels, for example, so that they can be used as a substitute of the conventional ECP and ALC panels. In that case, it is desirable to have performance such as strength, heat insulation, and sound insulation that is equal to or higher than that of conventional ECP and ALC panels.

  Further, since the panel structure 30 is manufactured by injection molding, it is possible to perform tile attachment or main stone attachment. Particularly, in the conventional ECP or ALC panel manufactured by extrusion molding, the metal fittings could not be integrally molded, and it was not possible to attach the main stone. Therefore, the panel of the present invention is superior to these panels. Have advantages.

<Fourth Embodiment>
FIG. 6 shows a decorative panel structure 40 in which a decorative panel 46 is attached to one of the main surfaces of the outer skin 32 of the panel structure 30 described above. The decorative panel 46 can be a tile, a main stone such as a natural stone or an artificial stone, or a printed layer formed by printing a pattern simulating a pattern of natural stone or a pattern of natural wood on paper, a resin sheet, or the like. The decorative panel 46 can be attached to the panel structure 30 by a conventional method, for example, using an adhesive (tiling). In particular, when the decorative panel 46 is used as the printing layer, a beautiful design such as natural stone or natural wood that is full of high quality can be easily formed on the surface of the panel structure 30 at low cost. Further, the upper surface of the printed layer may be coated with a paint containing an ultraviolet curable resin or the like, and it is possible to provide a further improved appearance.

  As described above, the panel structure of the present invention has been described with reference to some embodiments, but the present invention is not limited to such embodiments.

  As described above, the panel structure of the present invention can provide a lightweight and excellent strength, heat insulating property, sound insulating property and the like and an excellent design as required, and therefore, a wall material, a partition material, and a roof material. , It can be used as a building material such as a floor material, especially as a wall material, especially as an outer wall material. It can also be used as a substitute for conventional ECP and ACL panels, especially ALC panels.

1, 21, 31 Core panel 2, 22, 32 Outer skin 3, 3 ', 33, 33' Reinforcing panel 10 Panel structure (first embodiment)
20-panel structure (second embodiment)
30 panel structure (third embodiment)
34 convex part 35 concave part 40 decorative panel structure (4th Embodiment)
46 decorative panels

Claims (12)

An outer skin structure of a panel structure including an outer skin for burying a core panel,
Reinforcing panels are arranged on both sides of the core panel,
An outer skin structure of a panel structure in which the outer surfaces of the core panel and the two reinforcing panels are embedded with an outer skin containing ceramics and fibers.   The outer cover structure of the panel structure according to claim 1, wherein the fibers contained in the outer cover are one or more fibers selected from the group consisting of organic fibers and inorganic fibers.   The fibers contained in the outer cover are selected from the group consisting of polyvinyl alcohol fibers (vinylon fibers) which are organic fibers, polyolefin fibers and aramid fibers, and steel fibers, stainless fibers, carbon fibers and glass fibers which are inorganic fibers. The outer structure of the panel structure according to claim 2, wherein the outer structure is one or a plurality of fibers.   The outer skin structure of a panel structure according to any one of claims 1 to 3, wherein the ceramic contained in the outer skin is an inorganic compound or cement (cured body).   The outer skin structure of the panel structure according to any one of claims 1 to 4, wherein the outer skin is porous.   The outer skin structure of the panel structure according to any one of claims 1 to 5, wherein the outer skin embeds the outer surfaces of the core panel and the two reinforcing panels in a substantially equal thickness.   The outer skin structure of the panel structure according to any one of claims 1 to 6, wherein at least two side surfaces of the outer skin are formed with a protrusion and a recess that can be engaged with each other. ..   The outer cover structure of the panel structure according to claim 1, wherein the reinforcing panel is made of metal.   The outer skin structure of the panel structure according to claim 8, wherein the reinforcing panel is a plated steel plate.   The outer cover structure of a panel structure according to any one of claims 1 to 9, wherein the core panel is porous.   A panel structure comprising the outer cover structure according to claim 1. The panel structure according to claim 11, which is used as a wall material.

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