Covering plate

Abstract

To provide a covering plate that can solve two problems, including noise reduction to improve the working environment and the problem of temperature rise in the covering plate, at a relatively low cost. [Solution] The covering plate body 20 has a hollow structure and a sound-absorbing mat 40 is loaded into the internal space of the covering plate body in a removable state. The upper surface of the covering plate body 20 is covered with a resin composite functional layer 30a having heat-shielding, sound-insulating, and anti-slip functions, and the side surface 20c of the covering plate body 20 is covered with a resin sound-insulating and heat-shielding layer 30c.

Description

Technical Field

[0001] The present invention relates to a formwork used at construction sites such as roads, subways, and temporary bridges, and particularly to a formwork with improved heat storage and sound insulation properties.

Background Art

[0002] Due to the influence of rising temperatures in recent years, new countermeasures against temperature rise for formwork are required. For example, when using formwork outdoors in summer, it has been pointed out that as a result of the formwork being overheated, it creates a harsh working environment where workers may suffer from heatstroke. Patent Document 1 discloses suppressing the temperature rise of formwork by applying a heat-insulating paint having a sunlight reflection effect on the upper surface of the formwork body.

[0003] On the other hand, as an old problem of formwork, noise countermeasures and vibration countermeasures are known. Patent Document 2 discloses covering the upper surface of the formwork with a rubber sheet as a noise countermeasure for the formwork. Patent Document 3 discloses adhering and attaching a thin sound-absorbing board having both a vibration-proof function and a sound-absorbing function to the inner surface of the formwork. Patent Document 4 discloses attaching a fiber sound-absorbing material to the bottom surface of the formwork to improve sound insulation.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Summary of the Invention

[0005] Conventional roofing plates have the following inherent problems that need to be addressed. <1> The covering plate described in Patent Document 1 has a partial heat-shielding structure in which heat-shielding treatment is applied only to the upper surface of the covering plate body, and therefore cannot exhibit sufficient heat-shielding effect. In particular, conventional decking plates have a hollow interior, and because the heated air is sealed inside with no way to escape, it is difficult for it to cool down, and the high temperature of the decking plate is maintained. Therefore, if the covering plates are exposed to direct sunlight for extended periods, it becomes impossible to prevent excessive temperature increases caused by the covering plates. <2> Regarding noise reduction measures for roof covering plates, in a configuration where only the top surface of the covering plate is covered with a rubber sheet, there are durability issues with the rubber sheet, and it is technically difficult to prevent noise generation caused by warping or distortion of the covering plate. <3> The noise reduction technology for covering plates described in Patent Documents 3 and 4 involves sound reverberating within a cavity formed inside the covering plate body, causing the reverberant sound to leak to the outside. Therefore, the noise suppression effect is small, and there is a need to develop new covering plates that offer even greater quietness. <4> Even if conventional decking panels have noise reduction measures in place, they lack special measures to suppress temperature rise, making it unavoidable for the panels to overheat during the summer months. As mentioned earlier, if the temperature of the roofing panels becomes excessively high, the adhesive softens, causing the sound-absorbing panels attached to the panels for soundproofing purposes to peel off, resulting in a recurrence of noise problems. <5> Thus, conventional decking plates have insufficient measures to prevent temperature rise and noise, and there is room for improvement.

[0006] The objective of the present invention is to provide a covering plate that can solve two problems, including noise reduction for improving the working environment and the problem of temperature rise in the covering plate, at a relatively low cost. [Means for solving the problem]

[0007] The present invention relates to a roofing plate comprising a hollow roofing plate body having a top surface, a bottom surface and a plurality of side surfaces, and a sound-absorbing mat loaded into the internal space of the roofing plate body, wherein the roofing plate body comprises a composite functional layer made of resin having heat-shielding, sound-insulating, and anti-slip functions covering its top surface, and a sound-insulating and heat-shielding layer made of resin covering the plurality of side surfaces. Furthermore, the composite functional layer is constructed by mixing fine particles into a heat-shielding paint, the soundproof and heat-shielding layer is constructed solely of heat-shielding paint without fine particles, the sound-absorbing mat is constructed of a porous, heat-resistant fiber material having sound-absorbing and heat-shielding functions, the sound-absorbing mat is densely packed throughout the entire internal space of the covering plate body to suppress the generation of reverberating sound within the internal space of the covering plate body, and the sound-absorbing mat is sealed in a removable manner by fixing side plates to the sides of the covering plate body. Book In another embodiment of the invention, the sound-absorbing mat is either a mineral fiber material or an inorganic fiber material, or a combination thereof. In another embodiment of the present invention, the composite functional layer is composed of a mixture of a resin-based heat-shielding paint and hard fine particles mixed with the heat-shielding paint, and the surface of the composite functional layer is formed to be rough. In another embodiment of the present invention, the hard fine-grained material is one of the following: silica sand, crushed industrial waste, or granulated material made from waste. In another embodiment of the present invention, the hard granular material is a ceramic material. 。 Book In another embodiment of the invention, the composite functional layer and the soundproof and heat-insulating layer are continuous via a resin-based heat-insulating coating. [Effects of the Invention]

[0008] The present invention provides at least one of the following effects. <1> The composite functional layer covering the upper surface of the roofing plate body and the soundproof and heat-insulating layer covering the sides of the roofing plate body not only have heat-insulating and soundproofing functions, but the sound-absorbing mat installed in the internal space of the roofing plate body also has heat-insulating and soundproofing functions. Therefore, it is possible to suppress the temperature rise of the cover plates and to implement noise reduction measures for the cover plates at a low cost. <2> Because measures are taken to suppress temperature rise not only on the outer surface of the covering plate itself, but also in the internal space of the covering plate itself, excessive temperature rise can be reliably prevented even when the covering plate is used in direct sunlight for extended periods. Therefore, by simply making the aforementioned simple improvements to the inside and outside of the covering plate itself, it is possible to reduce the risk of heatstroke among workers and prevent the entire construction site from becoming a high-temperature environment. <3>By making the heat-insulating paint covering the upper and side surfaces of the covering board body continuous, not only can the heat conduction between the upper surface and the side surface of the covering board body be effectively reduced, but also the sound conduction can be effectively reduced. <4>By forming the sound-absorbing mat from a porous material with excellent heat resistance, there is no risk of the sound-absorbing mat melting even when it is exposed to high heat during the production of the covering board body by welding. <5>The composite functional layer and the sound insulation and heat insulation layer covering the surface and side surfaces of the covering board body function as sound insulation members, and the sound-absorbing mat loaded in the internal space of the covering board body functions as a member for preventing the generation of reverberation sound. Therefore, the quietness of the covering board can be significantly improved compared to the conventional one, which is very helpful for solving the noise problem not only when the covering board is used outdoors but also when it is used in underground spaces. <6>Since the sound-absorbing mat is loaded in a removable state in the internal space of the covering board body, it becomes easier to separate the steel material and the sound-absorbing mat constituting the covering board when the covering board body is disassembled. <7>Even if a part of the composite functional layer or the sound insulation and heat insulation layer covering the covering board body is worn out, it can be repaired by a simple operation of recoating with the same resin. Therefore, the repair work of the composite functional layer or the sound insulation and heat insulation layer can be easily carried out on-site without bringing the covering board into the factory. <8>Applying additives as in the prior art increases the weight of the covering board itself and increases the CO2 emissions of the transport vehicle for the covering board. In contrast, in the present invention, the composite functional layer and the sound insulation and heat insulation layer covering the covering board body are thin and lightweight, and furthermore, the sound-absorbing mat enclosed in the covering board body is also lightweight. Therefore, it is possible to avoid an increase in CO2 emissions associated with the vehicle transportation of the covering board.

Brief Description of the Drawings

[0009] [Figure 1] Overall perspective view of the covering board according to the present invention with a part broken [Figure 2A] Plan view of the bottom side of the covering board with a part omitted [Figure 2B]Enlarged side view of the end of the formwork board with a part omitted [Figure 3A] Cross-sectional view of the formwork board with a part omitted [Figure 3B] Enlarged cross-sectional view of the composite functional layer [Figure 3C] Cross-sectional view of the formwork board for explaining other sound-absorbing mats [Figure 4] Explanation diagram of the experimental results of the sound absorption performance by glass wool, polystyrene foam, etc.

Embodiment for Carrying out the Invention

[0010] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0011] <1> Outline of the formwork board Referring to FIGS. 1 and 2, the formwork board 10 according to the present invention includes a formwork board body 20 having a hollow structure, a resin composite functional layer 30a covering the upper surface 20a of the formwork board body 20, a resin sound insulation and heat insulation layer 30c covering the side surface 20c of the formwork board body 20, and a sound-absorbing mat 40 densely loaded in the internal space of the formwork board body 20.

[0012] <2> Formwork board body The formwork board body 20 is a hollow box having a rectangular shape with a width of 1 m, a length of 1 to 8 m, and a thickness of about 0.2 m, and has an upper surface 20a, a bottom surface 20b, and four side surfaces 20c.

[0013] In this example, a plurality of steel materials 21 made of H-shaped steel are arranged in parallel, and the adjacent parts of the flanges are integrally joined by welding or the like to manufacture the formwork board body 20, and a form having a plurality of studios 24 inside the formwork board body 20 will be described.

[0014] For the shaped steel 21, for example, corrugated H-shaped steel with lattice-shaped irregularities formed on the flange surface, ordinary H-shaped steel with a smooth flange surface, or channel steel can be used. Side plates 25 are welded to the four side portions of the formwork board body 20 to form four side surfaces 20c.

[0015] The upper surface 20a of the covering plate body 20 has a plurality of suspension holes 22, and each suspension hole 22 is sealed with a protective cover 23.

[0016] As shown in Figure 2, either known rubber pads 26 are attached to the four corners of the bottom surface 20b of the decking plate body 20, or stoppers 27 that can abut against the support beam 50 are provided protruding downward at positions close to each pad 26. If necessary, a known screw-type fastening clip (not shown) that can be clamped onto the support beam is assembled to the lower flange. These pads 26, stoppers 27, and fastening clips are not essential components and can be omitted.

[0017] <3> Composite functional layer The composite functional layer 30a is a resin layer having heat-shielding, sound-insulating, and anti-slip functions, and is constructed by mixing fine particles 31 into a heat-shielding paint. The resin coating that constitutes the composite functional layer 30a exhibits heat-shielding, sound-insulating, and anti-slip functions, and the fine-grained material 31 further enhances the anti-slip function by creating an uneven, rough surface on the surface of the composite functional layer 30a. The thickness of the composite functional layer 30a can be selected as appropriate, taking into consideration durability and other factors. The practical thickness of the composite functional layer 30a is, for example, about 2 to 10 mm.

[0018] <3.1> Heat-reflective paint The heat-shielding resin coating 32 that constitutes the composite functional layer 30a can be an inexpensive, commercially available resin coating with excellent durability and slip resistance. As the heat-shielding paint 32, commercially available paints such as acrylic resin, epoxy resin, urethane resin, polyester resin, vinyl ester resin, polyurethane resin, and engineering plastics can be used. For practical purposes, an acrylic silicone heat-shielding paint that does not contain the heavy metal chromium and contains special infrared-reflective pigments that exhibit excellent heat-shielding properties is preferable.

[0019] <3.2> Fine grain material The fine-grained material 31 is a hard granular material that provides anti-slip functionality, and can be, for example, silica sand, crushed fragments of various industrial wastes, or granulated materials made from waste. The shape, size, and mixing ratio of the fine granules 31 can be selected as appropriate.

[0020] In practical terms, it is preferable to use finely crushed ceramic waste as the fine granular material 31. Conversely, when silica sand is mixed into a resin-based heat-shielding paint 32, the silica sand only exhibits anti-slip properties, and its low light reflectivity means that little heat-shielding effect can be expected. In contrast, using ceramic materials such as alumina and zirconia, which have high reflectivity to sunlight, can be expected to provide excellent heat shielding effects. In this way, when ceramic material, which is waste, is used for the fine-grained material 31, not only can a heat-shielding effect be expected due to the heat-shielding paint 32, but a heat-shielding effect can also be expected due to the ceramic material exposed to the outside, thus further enhancing the heat-shielding performance of the composite functional layer 30a.

[0021] <4> Soundproof and heat-insulating layer The soundproof and heat-insulating layer 30b is a resin layer having heat-insulating and soundproofing functions, and is composed of the same heat-insulating paint 32 as the composite functional layer 30a described above.

[0022] <4.1> Thickness of the soundproofing and heat-insulating layer The thickness of the soundproofing and heat-insulating layer 30b can also be selected, but it must meet the standard dimensions of the covering plate 10. To meet the standard dimensions of the covering plate 10, the soundproofing and heat-insulating layer 30c is made thin, for example, about 1 to 2 mm thick.

[0023] If the soundproofing and heat-insulating layer 30c is thinner than 1 mm, it will negatively affect its durability, and if the soundproofing and heat-insulating layer 30c is thicker than 2 mm, it may no longer meet the standard dimensions of the covering plate 10.

[0024] By making the thickness of the soundproofing and heat-shielding layer 30b for the sides thin within the standard dimensions, the covering plates 10 can be smoothly fitted together when laying multiple covering plates 10 adjacent to each other.

[0025] <4.2> Continuity of soundproofing and heat-insulating layers The composite functional layer 30a and the soundproof and heat-insulating layer 30b have a systematic continuity through a common heat-insulating coating. The reason for providing continuity in the heat-shielding paint covering the upper surface 20a and side surfaces 20c of the main body of the covering plate 20 is to increase the vibration damping area and sound absorption area, thereby improving sound absorption and vibration damping. Furthermore, the heat-shielding paint covering the upper surface 20a and side surface 20c of the decking plate body 20 is designed to be continuous in order to reduce heat conduction from the upper surface 20a side of the decking plate body 20 toward the side surface 20c side.

[0026] <5> Sound-absorbing mat The sound-absorbing mat 40 has sound-absorbing and heat-shielding functions and is made of a porous material with excellent heat resistance. It is installed in a removable manner throughout the entire area of ​​each chamber 24 of the covering plate body 20.

[0027] The reason for using a porous material as the material for the sound-absorbing mat 40 is to take advantage of the material's properties of heat insulation and sound absorption to enhance the heat resistance and soundproofing performance of the covering plate body 20.

[0028] <5.1> Reasons for using heat-resistant porous material in sound-absorbing mats While using urethane-based materials such as expanded polystyrene as the material for sound-absorbing mats can provide some sound absorption, urethane is susceptible to heat. This creates a problem where the urethane melts due to the heat generated during welding when attaching the side panels to the main body of the covering plate during the manufacturing process.

[0029] Therefore, in this invention, instead of using a urethane-based material for the sound-absorbing mat 40, a porous material with excellent heat resistance is used. If a porous material with excellent heat resistance is used for the sound-absorbing mat 40, there will be no need to worry about the sound-absorbing mat 40, which is placed inside the welding chamber 24 when the covering plate is manufactured, melting even if it is exposed to the heat during welding.

[0030] <5.2> Examples of sound-absorbing mat materials The sound-absorbing mat 40 can be made from materials such as mineral fiber materials like glass wool or rock wool, or inorganic fiber materials like refractory ceramic fiber, either individually or in combination of several types. These fibrous materials are either needle-punched to intertwine the fibers, or bound together into a mat (blanket) using a binder.

[0031] <5.3> Reasons for densely installing sound-absorbing mats inside the studio For example, even if a sheet-like porous material is placed along the inner wall of studio 24, a certain degree of sound insulation can be expected. However, if there are cavities remaining inside the sheet material, these cavities will cause sound to reverberate. Therefore, in this invention, in order to prevent the formation of cavities that cause sound reflection within the drawing room 24, sound-absorbing mats 40 are densely packed inside the drawing room 24. In this invention, "dense" refers to a state in which a porous material is contained within the drawing room 24 in such a way that the generation of reverberating sounds within the drawing room 24 can be suppressed.

[0032] <5.4> Reasons for making the sound-absorbing mat removable In this invention, the sound-absorbing mat 40 is loaded into the drawing room 24 in a removable form. The sound-absorbing mat 40 is loaded in a removable form in order to facilitate the separation of the steel material constituting the covering plate body 20 from the sound-absorbing mat 40 when the covering plate body 20 is dismantled.

[0033] For example, if the sound-absorbing mat 40 is made of a urethane-based material such as expanded polystyrene, it will take a lot of time and effort to separate the steel material from the urethane-based material when dismantling the main body of the covering plate. By loading the sound-absorbing mat 40 into the sound chamber 24 in a removable form, anticipating the separation work required when dismantling the main body of the roofing plate 20, the sound-absorbing mat 40 can be easily recovered when the main body of the roofing plate 20 is dismantled.

[0034] <5.5> Modified examples of sound-absorbing mats Figure 3C shows a modified example of the sound-absorbing mat 40. In this example, the sound-absorbing mat 40 is constructed by laminating an outer shell mat 41 made of inorganic fiber material and an inner mat 42 made of mineral fiber material. The outer shell mat 41 is the outer surface portion of the sound-absorbing mat 40, and is made of, for example, isowol (ceramic fiber) which has high heat insulation properties. The inner mat 42 is located inside the outer shell mat 41 and is made of, for example, glass wool. The outer mat 41 is superior to the inner mat 42 in terms of heat resistance and water resistance.

[0035] The sound-absorbing mat 40 is constructed as a laminate of an outer shell mat 41 and an inner mat 42 made of different materials in order to avoid thermal damage to the inner mat 42 when welding the side plates 25 and to avoid corrosion of the inner mat 42 due to water ingress.

[0036] <5.6> Sound absorption characteristics of sound-absorbing mats A comparative experiment (reverberation chamber sound absorption coefficient test) was conducted to assess the sound absorption performance of sound-absorbing mat 40 and foam insulation material. Glass wool was used for the sound-absorbing mat 40, and polystyrene foam was used for the foam insulation material.

[0037] The test results for both materials are shown in Figure 4. According to the test results, glass wool has significantly higher sound absorption performance compared to polystyrene foam. Glass wool absorbs sound by vibrating the fibers as sound is transmitted through them, thus exhibiting superior sound absorption performance. Furthermore, glass wool exhibits high sound absorption characteristics across a wide frequency range, from low to high frequencies.

[0038] [Method for manufacturing protective sheeting] The method for manufacturing the protective plate 10 will be explained below.

[0039] 1. Fabrication of the main body of the covering plate Multiple H-shaped steel members 21 are arranged in parallel, and the adjacent flanges of each steel member 21 are joined by welding to produce the main body of the covering plate 20.

[0040] 2. Loading the sound-absorbing mat <1> Loading sound-absorbing mats Sound-absorbing mats 40 are densely packed into each compartment 24 defined inside the main body 20 of the covering plate.

[0041] <2> Sealing of openings Side plates 25 are welded to the perimeter of the main body 20 of the covering plate, and sound-absorbing mats 40 are sealed inside each chamber 24. As technically confirmed, the heat-resistant sound-absorbing mat 40 does not suffer any heat damage when the side panels 25 are welded and attached.

[0042] 3. Coating treatment of the main body of the covering plate. The fabrication of the covering plate 10 is completed by forming a composite functional layer 30a and a soundproof and heat-insulating layer 30c on the upper surface 20a and side surface 20c of the covering plate body 20 in the following manner. do.

[0043] <1> Formation of a multi-functional layer A slurry-like resin, in which fine granular material 31 is mixed with heat-shielding paint, is applied to the upper surface 20a of the covering plate body 20 to form a composite functional layer 30a.

[0044] <2> Formation of a soundproof and heat-insulating layer A slurry-like heat-shielding paint that does not contain fine granular material 31 is applied to the side surface 20c of the main body 20 of the covering plate to form a soundproof and heat-shielding layer 30c. The resin can be applied using a coating method such as a trowel or roller, or a spraying method, similar to the composite functional layer 30a.

[0045] [Characteristics of the covering plate] The main characteristics of the covering plate 10 according to the present invention will be described below.

[0046] 1. Temperature characteristics (heat storage capacity) of the decking plate The upper surface of the decking plate body 20 is covered with a composite functional layer 30a that has a heat-shielding function, and the sides of the decking plate body 20 are also covered with a soundproof and heat-shielding layer 30c that has a heat-shielding function. Therefore, even when the covering plate 10 is used outdoors, the composite functional layer 30a and soundproof and heat-insulating layer 30c covering the outer surface of the covering plate body 20 suppress heat conduction and prevent the temperature of the covering plate body 20 from rising.

[0047] Furthermore, the covering plate 10 has a sound-absorbing mat 40 with heat-shielding properties densely housed in a chamber 24 inside the covering plate body 20. The sound-absorbing mat 40 functions not only as a soundproofing material but also as an insulating material, thus greatly contributing to suppressing the temperature rise of the covering plate 10. Because the sound-absorbing mat 40 also has excellent heat resistance, it is less likely to deteriorate due to heat even after long-term use, and the original properties of the sound-absorbing mat 40 can be maintained for a long period of time.

[0048] As described above, the covering plate 10 according to the present invention has a means for suppressing temperature rise not only on the outer surface of the covering plate body 20 but also in the internal space, so that even if the covering plate 10 is exposed to direct sunlight for a long period of time, excessive temperature rise can be effectively prevented. Therefore, by suppressing the temperature rise of the covering plate 10, the risk of heatstroke among workers can be reduced, and it is possible to reliably prevent the entire construction site from becoming a high-temperature environment.

[0049] 2. Sound insulation properties of the covering plates The upper surface of the decking plate body 20 is covered with a composite functional layer 30a that has soundproofing properties, and the sides of the decking plate body 20 are also covered with a soundproof and heat-insulating layer 30c that has soundproofing properties.

[0050] Furthermore, the covering plate 10 has sound-absorbing mats 40, which have sound-absorbing and sound-insulating functions, fitted tightly into the chambers 24 inside the covering plate body 20.

[0051] The composite functional layer 30a for the top surface, the soundproof and heat-insulating layer 30c for the sides, and the sound-absorbing mat 40 placed in the internal space of the covering plate body 20 work together to provide sound absorption. Therefore, while the cover plate 10 is in use, the sound of vehicles passing through the upper surface 20a of the cover plate 10, This effectively suppresses collision noise between adjacent decking plates 10, or collision noise between the bottom surface of a decking plate 10 and the support members that support the decking plate 10.

[0052] On the other hand, with conventional roofing panels that lack noise reduction measures on their sides, the generation of metallic noises was unavoidable when the sides of adjacent roofing panels collided with each other. In contrast, in the present invention, the sides of the covering plate body 20 are covered with a soundproof and heat-insulating layer 30c that has a soundproofing function, so that metal-to-metal collisions can be avoided and the generation of metallic noise can be effectively suppressed by the frictional resistance of the soundproof and heat-insulating layer 30.

[0053] Thus, in the case of the covering plate 10 according to the present invention, the temperature rise suppression means implemented on the surface and internal space of the covering plate body 20 also functions as a soundproofing means, so the quietness of the covering plate 10 can be greatly improved compared to conventional ones. Therefore, when the covering plate 10 is used outdoors, it can greatly contribute to resolving noise problems, and when the covering plate 10 is used in an underground space, it can also help to resolve noise problems by suppressing the generation of reverberation.

[0054] 3. Repairability of the resin layer There is a risk that a portion of the composite functional layer 30a or the soundproof and heat-insulating layer 30c applied to the surface of the covering plate body 20 may peel off due to aging or other reasons. In such cases, it is possible to take the covering plate 10 back and repair it at a factory with manufacturing facilities, but even at sites without manufacturing facilities, it can be easily repaired in a short time simply by reapplying a resin material of the same quality as the composite functional layer 30a or soundproof and heat-insulating layer 30c of the covering plate 10. [Explanation of Symbols]

[0055] 10. Covering plate 20. Covering plate body 20a...Upper surface of the main body of the covering plate 20b...Bottom surface of the main body of the covering plate 20c...Side view of the main body of the covering plate 21... Steel material 22...hanging hole 23...Protective lid 24...Art room 25.. Side panel 30a...Multifunctional layer 30°C... Soundproof and heat-insulating layer 40...Sound-absorbing mat 41...Outer shell mat 42····Internal mat 50····Support beam

Claims

1. A covering plate comprising a hollow covering plate body having a top surface, a bottom surface and multiple side surfaces, and a sound-absorbing mat loaded into the internal space of the covering plate body, The covering plate body comprises a composite functional layer made of resin having heat-shielding, sound-insulating, and anti-slip properties covering its upper surface, and a sound-insulating and heat-shielding layer made of resin covering the plurality of sides. The aforementioned composite functional layer is constructed by mixing fine particles into a heat-shielding paint. The aforementioned soundproofing and heat-insulating layer is composed solely of heat-insulating paint that does not contain fine particles. The sound-absorbing mat is made of a porous, heat-resistant fiber material that has sound-absorbing and heat-shielding properties. In order to suppress the generation of reverberating sound within the internal space of the covering plate body, the sound-absorbing mat is densely packed throughout the entire internal space of the covering plate body. The sound-absorbing mat is enclosed in a removable manner by fixing a side plate to the side surface of the main body of the covering plate, Covering plate.

2. The decking plate according to claim 1, characterized in that the sound-absorbing mat is made of either mineral fiber material or inorganic fiber material, or a combination thereof.

3. The lining plate according to claim 1, characterized in that the composite functional layer is composed of a mixture of a resin-based heat-shielding paint and hard fine particles mixed with the heat-shielding paint, and the surface of the composite functional layer is formed to be rough.

4. The lining plate according to claim 3, characterized in that the hard fine-grained material is one of the following: silica sand, crushed industrial waste, or granulated material made from waste.

5. The lining plate according to claim 4, characterized in that the hard fine-grained material is a ceramic material.

6. The covering plate according to claim 1, characterized in that the composite functional layer and the soundproof and heat-insulating layer are continuous via a resin-based heat-insulating coating.

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