Heated table

Abstract

To provide a heated table capable of suppressing displacement and rattling of a top plate and easily maintaining a low manufacturing cost.SOLUTION: A heated table comprises a top plate support part equipped with a heater, a plurality of legs for supporting the top plate support part at a prescribed height, and a top plate to be placed on the top plate support part, where the top plate includes a top plate body, a first coating layer applied to a back surface of the top plate body, and a second coating layer applied to a front surface of the top plate body, and where the first coating layer contains rough-surface forming fine particles having heat resistance to heat of the heater and forms a rough surface on the back surface of the top plate body for suppressing displacement of the top plate with relative to a comforter for the heated table.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a kotatsu table. [Background technology]

[0002] Conventionally, kotatsu tables have been known that have multiple legs, a top support section that supports the top, and a top that is placed on the top support section. When the kotatsu table is used as a heater, a kotatsu futon is placed on the top support section, and the top is placed on the kotatsu futon. When the kotatsu table is used as a heater, if a user applies force to the top, the top may slide on the kotatsu futon, causing it to become misaligned. In response to this, a kotatsu table that prevents the top from slipping has been proposed.

[0003] For example, Patent Document 1 discloses a kotatsu with a futon stopper structure that includes a kotatsu body having an upper frame, legs supporting the upper frame, and a heater, with a mating recess on the upper surface of the upper frame, and a top plate with a mating protrusion on the underside that cooperates with the mating recess to clamp a kotatsu comforter by bending it up or down, or up and down.

[0004] Patent document 2 also discloses a non-slip device for the top of a furniture-style kotatsu, which is made by attaching protrusions to a sheet made of a non-slip material such as synthetic rubber and placing this between the kotatsu futon and the top to stabilize the top. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-166651 [Patent Document 2] Japanese Utility Model Application Publication No. 5-52614 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the kotatsu described in Patent Document 1, gaps may occur between the mating recesses and protrusions and the kotatsu comforter, or the kotatsu comforter may be deformed by being pressed by the mating recesses and protrusions, causing the tabletop to wobble. Even in the kotatsu table using the non-slip tabletop described in Patent Document 2, the tabletop may wobble due to wear or falling off of some of the protrusions. Furthermore, employing such special structures tends to unnecessarily increase manufacturing costs.

[0007] An object of one aspect of the present invention is to provide a kotatsu table that can suppress shifting and rattling of the tabletop and that can be easily maintained at low manufacturing costs. [Means for solving the problem]

[0008] A kotatsu table according to one embodiment of the present invention comprises a top plate support portion equipped with a heater, a plurality of legs supporting the top plate support portion at a predetermined height, and a top plate placed on the top plate support portion, wherein the top plate has a top plate body, a first coating layer applied to the back surface of the top plate body, and a second coating layer applied to the surface of the top plate body, and the first coating layer contains fine particles for forming a rough surface that is heat resistant to the heat of the heater and forms a rough surface on the back surface of the top plate body to prevent the top plate from slipping relative to the kotatsu futon. [Effects of the Invention]

[0009] According to the kotatsu table of one aspect of the present invention, it is possible to prevent the table top from shifting or rattling, and it is easy to keep manufacturing costs low. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view of a kotatsu table according to one embodiment. [Figure 2] 1 is an exploded perspective view of a kotatsu table according to one embodiment, seen from below. FIG. [Figure 3]1 is an exploded perspective view of a kotatsu table according to one embodiment, seen from above. FIG. [Figure 4] FIG. 2 is a cross-sectional view of the top plate perpendicular to the Y-axis. [Figure 5] FIG. 2 is a cross-sectional view of the top plate support portion, taken perpendicular to the Y-axis. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, embodiments of the present invention will be described with reference to the drawings. To facilitate understanding of the description, the same components in each drawing will be assigned the same reference numerals, and duplicate descriptions will be omitted. In this specification, a three-dimensional Cartesian coordinate system of three axial directions (X-axis, Y-axis, and Z-axis) may be used for the description. In this case, the direction perpendicular to the top plate is defined as the Z-axis direction, and one of the two mutually perpendicular directions on a plane perpendicular to the Z-axis is defined as the X-axis direction, and the other is defined as the Y-axis direction. In addition, the +Z-axis direction is defined as up, and the -Z-axis direction is defined as down.

[0012] Fig. 1 is a perspective view of a kotatsu table according to one embodiment, Fig. 2 is an exploded perspective view of the kotatsu table according to one embodiment as seen from below, Fig. 3 is an exploded perspective view of the kotatsu table according to one embodiment as seen from above, and Fig. 4 is a cross-sectional view of the table top perpendicular to the Y-axis. As shown in Figs. 1 to 3, the kotatsu table 1 comprises a table top support 2 on which a heater 6 is mounted, a plurality of legs 3 that support the table top support 2 at a predetermined height, and a table top 4 that is placed on the table top support 2. 2 and 4, the top plate 4 includes a top plate main body 40, a first coating layer 41 applied to the back surface (lower surface) S1 of the top plate main body 40, and a second coating layer 42 applied to the front surface (upper surface, or the surface of the top plate main body 40 opposite the top plate support portion 2) S2 of the top plate main body 40. The first coating layer 41 contains fine particles for forming a rough surface that are heat resistant to the heat of the heater 6, and forms a rough surface on the back surface of the top plate main body 40. Here, heat resistance to the heat of the heater 6 means heat resistance that does not cause deformation due to the heat of the heater 6. The first coating layer 41 and the second coating layer 42 are formed by coating with a coating agent. When the kotatsu table 1 is used as a heating appliance, the top plate 4 is placed on the top plate support portion 2 via an optional kotatsu futon. When the kotatsu table 1 is used as a table (not used as a heating appliance), the top plate 4 is placed directly on the top plate support portion 2.

[0013] The first coating layer 41, which contains heat-resistant fine particles for forming a rough surface and is applied to the underside S1 of the table top body 40, forms a rough surface on the underside S1 of the table top body 40. This creates fine irregularities on the underside S3 of the table top 4 due to the fine particles for forming a rough surface, thereby increasing the surface roughness of the underside S3 of the table top 4 compared to when the first coating layer 41 is not provided. Therefore, when the table top 4 is placed on the table top support 2 via a kotatsu futon when the kotatsu table 1 is used as a heating appliance, the first coating layer 41 of the table top 4 comes into contact with the kotatsu futon, thereby preventing the table top 4 from shifting. Furthermore, because the first coating layer 41 is provided along the shape of the underside S1 of the table top body 40, the underside S3 of the table top 4 and the kotatsu futon can be tightly attached, preventing the table top 4 from rattling. Furthermore, the kotatsu table 1 does not require the addition of a separate component to the underside S1 of the table top body 40, making it easy to maintain low manufacturing costs.

[0014] Furthermore, the top plate 4 is prevented from absorbing moisture from outside and evaporating moisture to the outside by coating the top plate body 40 on both sides, or more precisely, the entire periphery, with the first coating layer 41 together with the second coating layer 42. In this embodiment, the top plate 4 is formed to be long, with the long side exceeding 1 m in length, and is heated by the heat generated by the kotatsu heater 6, which may cause the top plate to warp if it expands or contracts due to changes in the moisture content. However, the first coating layer 41 and the second coating layer 42 prevent and suppress the occurrence of such problems.

[0015] The tabletop body 40 and tabletop support portion 2 are made of fiberboard, more specifically, MDF (Medium Density Fiberboard) by directly printing wood grain. The legs 3 are made of suitable wood. The first and second coating layers 41 and 42 can be formed by UV or PU coating, but in this embodiment, UV coating is used. The tabletop body 40 is made of a material that undergoes dimensional change due to the heat generated by the heater 6, specifically, wood. Instead of the MDF, solid wood, laminated wood, or laminated material can also be used. The surface design of the tabletop 4 can also be achieved by applying a decorative material such as a decorative sheet to the MDF instead of the direct printing method described above.

[0016] The top plate support part 2 may be flat, frame-like, or lattice-like. The shape of the top plate support part 2 in a plan view is not particularly limited, but may be, for example, triangular, rectangular, circular, elliptical, etc. A heater 6 is provided on the lower surface S7 of the top plate support part 2.

[0017] The table top support part 2 is preferably flat, and the first coating layer 41 is preferably provided on the entire surface of the table top main body 40 that faces the table top support part 2. This increases the contact area between the first coating layer 41 of the table top 4 and the kotatsu futon when the table top 4 is placed on the table top support part 2 with a kotatsu futon between them, and allows the table top 4 and the kotatsu futon to be more closely attached. This allows the kotatsu table 1 to further prevent the table top 4 from shifting or rattling.

[0018] When the top plate support part 2 is flat, it may have a pair of screw holes 23 arranged diagonally. A screw 5 can be inserted into the screw holes 23 from the underside S7 of the top plate support part 2, and the screw 5 passes through the screw holes 23. When the kotatsu table 1 is used as a table, the top plate 4 is placed directly on the top plate support part 2, and the screw 5 is inserted into the screw hole 23 from the underside S7 of the top plate support part 2 and screwed into the female screw hole 43 on the underside S3 of the top plate 4, thereby fixing the top plate 4 to the top plate support part 2. When the kotatsu table 1 is used as a heating appliance, the top plate support part 2 and the top plate 4 can be separated by removing the screw 5 from the female screw hole 43 of the top plate 4, and a kotatsu futon can be placed between the top plate support part 2 and the top plate 4.

[0019] When the top support part 2 has a rectangular shape in a plan view, the legs 3 are provided at the four corners of the lower surface S7 of the top support part 2. The shape of the legs 3 is not particularly limited, but may be, for example, a cylinder or a rectangular pillar. The legs 3 may have a first leg 31 having one end connected to the lower surface S7 of the top support part 2, and a second leg 32 having one end connected to the other end of the first leg 31. The first leg 31 and the second leg 32 are connected in the longitudinal direction of the legs 3. The second leg 32 is detachable from the first leg 31. With this configuration, the height of the legs 3 can be changed. That is, with this configuration, the height of kotatsu table 1 can be changed; for example, when using kotatsu table 1 while sitting on the floor, the height of kotatsu table 1 can be lowered by removing second leg 32 from first leg 31, and when using kotatsu table 1 while sitting on a chair, the height of kotatsu table 1 can be increased by attaching second leg 32 to first leg 31. Second leg 32 can be detachable from first leg 31, for example, by a screw structure.

[0020] The height of the kotatsu table 1 can be, for example, 60 cm to 70 cm when the second leg 32 is attached to the first leg 31, and can be, for example, 35 cm to 45 cm when the second leg 32 is detached from the first leg 31. Here, the height of the kotatsu table 1 refers to the distance from the bottom end of the leg 3 to the upper surface S4 of the table top 4. Note that the leg 3 is not limited to a configuration having the first leg 31 and the second leg 32, and may be extendable in the vertical direction, for example. In this case, the maximum height of the kotatsu table 1 can be, for example, 60 cm to 70 cm, and the minimum height can be, for example, 35 cm to 45 cm.

[0021] Even when the height of the kotatsu table 1 is made relatively high (for example, 60 cm or more and 70 cm or less) with the top plate 4 placed on the top plate support part 2 via a kotatsu futon, the top plate 4 has the first coating layer 41, which prevents the top plate 4 from shifting or rattling.

[0022] The top plate main body 40 is flat. The planar shape of the top plate main body 40 is not particularly limited, and can be, for example, a triangle, a rectangle, a circle, an ellipse, or the like. When the top plate main body 40 has a triangular or rectangular shape in plan view, the top plate main body 40 may have rounded corners. The planar shape of the top plate main body 40 can be the same as the planar shape of the top plate support part 2, or a shape similar to the planar shape of the top plate support part 2. When the planar shape of the top plate main body 40 is a shape similar to the planar shape of the top plate support part 2, the periphery of the top plate main body 40 is located outside the periphery of the top plate support part 2 in plan view.

[0023] The top plate 4 may have a frame portion (not shown) that covers the side surfaces of the top plate main body 40, the peripheral edge of the upper surface S4, and the peripheral edge of the lower surface S3. The top plate 4 may have a pair of female screw holes 43 provided diagonally on the lower surface S3. The female screw holes 43 do not open on the upper surface S4 side of the top plate 4. As described above, the screws 5 are threaded into the female screw holes 43.

[0024] When the periphery of the tabletop main body 40 is located outside the periphery of the tabletop support part 2 in plan view, the first coating layer 41 may or may not be provided on the underside of the tabletop main body 40 that does not face the tabletop support part 2. In other words, the first coating layer 41 may or may not be provided on an area of ​​the underside of the tabletop main body 40 other than the projected area of ​​the tabletop support part 2 in plan view.

[0025] The arithmetic mean roughness (Ra) of the first coating layer 41 is preferably 4 μm or more and 100 μm or less, more preferably 6 μm or more and 100 μm or less, and even more preferably 8 μm or more and 100 μm or less. In this specification, the arithmetic mean roughness is based on JIS B 0601:2013 and can be measured using a surface roughness measuring instrument such as a stylus type, a light cutting type, or an optical interference type.

[0026] Since the arithmetic mean roughness of the first coating layer 41 is 4 μm or more and 100 μm or less, when the top plate 4 is placed on the top plate support part 2 with a kotatsu futon between them, the fibers of the kotatsu futon are more likely to get caught in the first coating layer 41, and the kotatsu table 1 can further prevent the top plate 4 from shifting. Furthermore, the kotatsu table 1 can prevent the top plate 4 from shifting regardless of the type or fiber diameter of the fiber used in the kotatsu futon.

[0027] The average particle size of the fine particles for forming a rough surface contained in the first coating layer 41 is preferably 0.5 μm to 50 μm, more preferably 1 μm to 40 μm, and even more preferably 1.5 μm to 30 μm. In this embodiment, the average particle size is specifically in the range of 10 μm to 15 μm. In this specification, the average particle size of the fine particles for forming a rough surface used in the first coating layer 41 refers to the average particle size of the particles in a stable state, and may be, for example, the average particle size of independent primary particles or the average particle size of secondary particles (aggregated particles) formed by tight aggregation of primary particles. The average particle size can be measured, for example, using a laser diffraction / scattering device or a Coulter counter device. Since the average particle diameter of the fine particles for forming the rough surface is 0.5 μm or more and 50 μm or less, when the top plate 4 is placed on the top plate support part 2 via a kotatsu futon, the fibers of the kotatsu futon are more likely to get caught in the first coating layer 41, and the kotatsu table 1 can better prevent the top plate 4 from slipping.

[0028] The material constituting the fine particles for forming a rough surface preferably has a melting point of 400°C or higher and a relatively high hardness. The fine particles for forming a rough surface may be ceramic powder. Specific examples of materials constituting the fine particles for forming a rough surface include silicon dioxide, magnesium oxide, aluminum oxide, silicon carbide, silicon nitride, zirconium dioxide, magnesium carbonate, calcium carbonate, and magnesium hydroxide. Among these, the fine particles for forming a rough surface are preferably made of silicon dioxide. Silicon dioxide has excellent heat resistance, is relatively hard, and is colorless and transparent. Therefore, by using silicon dioxide as the fine particles for forming a rough surface, the first coating layer 41 can maintain the appearance of the table top body 40 while maintaining its fine irregularities even when subjected to heat from the heater 6 or external force. Therefore, the kotatsu table 1 can further suppress the shifting of the table top 4 without compromising the appearance of the table top 4. The first coating layer 41 may contain talcum powder to enhance heat resistance and the like, in addition to the fine particles for forming a rough surface.

[0029] The first coating layer 41 is made of a coating film containing a synthetic resin material. That is, the first coating layer 41 contains one or more types of synthetic resin material. The synthetic resin material can be, for example, one or more types selected from polyurethane acrylate resin, epoxy acrylate resin, acrylate resin, polyurethane resin, polyester resin, etc. Among these, the synthetic resin material is preferably polyurethane acrylate resin or epoxy acrylate resin. This prevents the fine particles for forming a rough surface in the first coating layer 41 from being detached even when an external force is applied to the first coating layer 41 due to friction caused by contact between the first coating layer 41 and the kotatsu futon, the weight of the table top 4, an object placed on the table top 4, etc.

[0030] The first coating layer 41 contains one or more synthetic resin materials, and the content of the fine particles for forming a rough surface is preferably 5% by mass to 60% by mass, more preferably 10% by mass to 50% by mass, and even more preferably 15% by mass to 40% by mass, based on the total mass of the first coating layer 41. The first coating layer 41 contains one or more synthetic resin materials, and the content of the fine particles for forming a rough surface is 10% by mass to 60% by mass, based on the total mass of the first coating layer 41. This allows the fine particles for forming a rough surface to be well dispersed in the synthetic resin material, and allows the fine particles for forming a rough surface to form unevenness throughout the first coating layer 41. Therefore, the kotatsu table 1 can further prevent the top plate 4 from shifting.

[0031] The thickness of the first coating layer 41 is preferably 16 μm to 400 μm, more preferably 30 μm to 400 μm, and even more preferably 50 μm to 400 μm. By having the thickness of the first coating layer 41 be 16 μm to 400 μm, the first coating layer 41 has excellent durability and can maintain the prevention of displacement of the top plate 4.

[0032] The second coating layer 42 contains the same synthetic resin material as the synthetic resin material contained in the first coating layer 41, but does not contain the fine particles for forming a rough surface contained in the first coating layer 41. This allows the upper surface S4 and the lower surface S3 of the top plate 4 to have similar durability, and the lower surface S3 of the top plate 4 can also have the function of suppressing the top plate 4 from shifting.

[0033] 5 is a cross-sectional view of the top-plate support part perpendicular to the Y-axis. As shown in FIGS. 3 and 5, the top-plate support part 2 preferably has a top-plate support part main body 20 and a third coating layer 21 containing fine particles for forming a rough surface, which is provided on the surface S6 of the top-plate support part main body 20 facing the top plate 4. As a result, the top-plate support part 2 has the third coating layer 21 containing fine particles for forming a rough surface, which is provided on the surface S6 of the top-plate support part main body 20 facing the top plate 4, so that fine irregularities due to the fine particles for forming a rough surface are formed on the upper surface S8 of the top-plate support part 2, and the surface roughness of the upper surface S8 of the top-plate support part 2 can be increased compared to when the third coating layer 21 is not provided. Therefore, when the kotatsu table 1 is used as a heating appliance, if the top plate 4 is placed on the top plate support part 2 with a kotatsu futon between them, the first coating layer 41 on the top plate 4 and the third coating layer 21 on the top plate support part 2 come into contact with the kotatsu futon, preventing the top plate 4 from sliding on the top plate support part 2 together with the kotatsu futon. In other words, the kotatsu table 1 can further prevent the top plate 4 from slipping. Furthermore, because the first coating layer 41 is provided along the shape of the underside S1 of the top plate main body 40 and the third coating layer 21 is provided along the shape of the surface S6 of the top plate support part main body 20 that faces the top plate 4, the top plate 4 and the top plate support part 2 can each be brought into close contact with the kotatsu futon, further preventing the top plate 4 from wobbling.

[0034] Specifically, the third coating layer 21 is preferably provided on the surface of the table top support body 20 that faces the first coating layer 41. That is, the third coating layer 21 is preferably provided in a projected area of ​​the first coating layer 41 on the surface S6 of the table top support body 20 that faces the table top 4 in a plan view. As a result, when the kotatsu table 1 is used as a heating appliance and the table top 4 is placed on the table top support part 2 with a kotatsu futon between them, the kotatsu futon can be sandwiched between the first coating layer 41 of the table top 4 and the third coating layer 21 of the table top support part 2, further preventing the table top 4 from shifting.

[0035] The arithmetic mean roughness (Ra) of the third coating layer 21 is preferably 4 μm to 100 μm, more preferably 6 μm to 100 μm, and even more preferably 8 μm to 100 μm. When the arithmetic mean roughness of the third coating layer 21 is 4 μm to 100 μm, when the top plate 4 is placed on the top plate support part 2 with a kotatsu futon between them, the fibers of the kotatsu futon are more likely to be caught in the third coating layer 21, and the kotatsu table 1 can further prevent the top plate 4 from shifting. Furthermore, the kotatsu table 1 can prevent the top plate 4 from shifting regardless of the type or diameter of the fibers used in the kotatsu futon.

[0036] The third coating layer 21 may have the same configuration as the above-described first coating layer 41. This allows the third coating layer 21 to achieve the same effects as the first coating layer 41.

[0037] 2 and 5, the table top support part 2 has a fourth coating layer 22 provided on the surface (lower surface) S5 of the table top support part main body 20 opposite the table top 4 side. The fourth coating layer 22 contains the same synthetic resin material as that contained in the third coating layer 21, but does not contain the fine particles for forming a rough surface contained in the third coating layer 21. This allows the upper surface S8 and lower surface S7 of the table top support part 2 to have similar durability, and the upper surface S8 of the table top support part 2 can also have the function of preventing the table top 4 and the kotatsu futon from slipping. The fourth coating layer 22 may contain the same synthetic resin material as that contained in the first coating layer 41.

[0038] Next, an example of a manufacturing method for the kotatsu table 1 of this embodiment will be described. The manufacturing method for the kotatsu table 1 of this embodiment includes a step of preparing the table top 4 and a step of attaching the legs 3 to the table top support part 2. The step of preparing the table top 4 includes a step of forming a first coating layer 41 containing fine particles for forming a rough surface on the underside S1 of the table top main body 40, and a step of forming a second coating layer 42 that does not contain the fine particles for forming a rough surface contained in the first coating layer 41 on the surface S2 of the table top main body 40 opposite the table top support part 2 side.

[0039] In the step of forming the first coating layer 41, the fine particles for forming a rough surface contained in the first coating layer 41 are the same as the fine particles for forming a rough surface in the kotatsu table 1 described above, and therefore a description thereof will be omitted.

[0040] Examples of methods for forming the first coating layer 41 and the second coating layer 42 include gravure coating, dipping, spraying, brush coating, roller coating, electrostatic coating, and electrodeposition coating.

[0041] The composition and thickness of the first coating layer 41 and the second coating layer 42 are similar to those of the first coating layer 41 and the second coating layer 42 in the kotatsu table 1 described above, and therefore a description thereof will be omitted.

[0042] The second coating layer 42 contains the same synthetic resin material as the synthetic resin material contained in the first coating layer 41, but does not contain the fine particles for forming a rough surface contained in the first coating layer 41. As a result, according to the manufacturing method of the kotatsu table 1 of this embodiment, the upper surface S4 and the lower surface S3 of the table top 4 can have similar durability, and the lower surface S3 of the table top 4 can also have the function of suppressing slippage of the table top 4.

[0043] In the step of forming the first coating layer 41, the first coating layer 41 is formed by laminating a plurality of layers, and the amount of application of each of the plurality of first coating layers 41 may be greater the closer the layer is to the lower surface S1 of the top plate body 40. In addition, it is preferable that the viscosity of each of the plurality of first coating layers 41 is greater the closer the layer is to the lower surface S1 of the top plate body 40. [Example]

[0044] The present invention will be explained below by giving specific examples, but the present invention is not limited to these examples.

[0045] The top plate 4 and the top plate support portion 2 of the kotatsu table 1 were fabricated and evaluated by the following method. Specific conditions are explained below.

[0046] Example 1 (Making the top plate) Coating solution A was prepared containing 15% by mass of silica (silicon dioxide) particles with an average particle size of 1 μm, 40% by mass of polyurethane acrylate resin, 40% by mass of epoxy acrylate resin, and 5% by mass of photoinitiator.Coating solution B was also prepared containing 48% by mass of polyurethane acrylate resin, 48% by mass of epoxy acrylate resin, and 4% by mass of photoinitiator.

[0047] Coating liquid A was applied at a rate of 32 g / m to one surface (surface S1) of the tabletop body measuring 1200 mm x 750 mm x 17 mm. 2The coating solution A was applied at a rate of 20 g / m on the first coating layer, and then irradiated with ultraviolet light from a UV lamp to harden the applied coating solution A, thereby forming a first coating layer. 2 The coating solution A was applied at a rate of 7 g / m on top of the second coating layer, and then irradiated with ultraviolet light from a UV lamp to harden the applied coating solution A, forming a second coating layer. 2 The coating solution A was then applied to the tabletop body using a UV lamp, and ultraviolet light was applied to harden the applied coating solution A, forming a third coating layer. As a result, a coating layer with a thickness of 80 μm was formed on one surface (surface S1) of the tabletop body. The gravure coating method was used for the application.

[0048] Next, the other surface (surface S2) of the tabletop body was coated with coating liquid B at a rate of 32 g / m 2 The coating solution B was then applied to the substrate at a rate of 20 g / m2, and then irradiated with ultraviolet light from a UV lamp to harden the applied coating solution B, thereby forming a first coating layer. 2 The coating solution B was then applied to the second coating layer at a rate of 7 g / m2, and then irradiated with ultraviolet light from a UV lamp to harden the applied coating solution B, forming a second coating layer. 2 The coating solution A was then applied using a UV lamp, and ultraviolet light was applied to harden the applied coating solution A, forming a third coating layer. As a result, a 50 μm thick coating layer was formed on the other surface (surface S2) of the tabletop body. The gravure coating method was used as the application method. Note that the coating process on the other surface (surface S2) of the tabletop body can be carried out in the same manner as general UV coating, as appropriate, rather than by applying multiple coats or using a different amount of coating as described above.

[0049] (Creating the top plate support part) A coating layer with a thickness of 80 μm was formed on one surface (surface S6) of a top plate support body measuring 1140 mm × 690 mm × 24 mm, in the same manner as the top plate, using coating liquid A. Next, a coating layer with a thickness of 50 μm was formed on the other surface (surface S5) of the top plate support body, using coating liquid B, in the same manner as the top plate.

[0050] <Comparative Example 1> A top plate of Comparative Example 1 was produced in the same manner as in Example 1, except that the coating liquid A applied to one surface of the top plate body was changed to coating liquid B.

[0051] A top plate support part of Comparative Example 1 was produced in the same manner as in Example 1, except that the coating liquid A applied to one surface of the top plate support part was changed to coating liquid B.

[0052] (evaluation) The planar profile of the coating layer on each of the top plate and the top plate support portion was measured in a 2.5 mm × 2.5 mm area using an optical interference surface roughness measuring instrument (model: VS1800, manufactured by Hitachi High-Tech Corporation). The arithmetic mean roughness (Ra) was calculated from the obtained planar profile in accordance with JIS B 0601:2013. The arithmetic mean roughness of the coating layer on the top plate (surface S3) and the top plate support portion (surface S8) of Example 1 was 7.716 μm and 7.750 μm, respectively. The arithmetic mean roughness of the coating layer on the top plate (surface S3) and the top plate support portion (surface S8) of Comparative Example 1 was 3.840 μm and 3.812 μm, respectively.

[0053] A kotatsu futon was laid on a stainless steel plate placed on a smooth floor, and the edges of the kotatsu futon were fixed to the stainless steel plate. A top plate was placed on the kotatsu futon so that the coating layer was in contact with the kotatsu futon, and the top plate was pulled horizontally at a speed of 300 mm / min. The maximum force at which the top plate began to slide was measured and the static friction coefficient was calculated. A top plate support part was placed on the kotatsu futon so that the coating layer was in contact with the kotatsu futon, and the same measurement was performed on the top plate support part to calculate the static friction coefficient. The static friction coefficients of the top plate (surface S3) and top plate support part (surface S8) of Example 1 were 0.53 and 0.65, respectively, and the static friction coefficients of the top plate (surface S3) and top plate support part (surface S8) of Comparative Example 1 were 0.31 and 0.37, respectively.

[0054] Although the embodiments have been described above, they are presented as examples and the present invention is not limited to the above embodiments. The above embodiments can be implemented in various other forms, and various combinations, omissions, substitutions, modifications, etc. can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the scope of the inventions and their equivalents as set forth in the claims. [Explanation of symbols]

[0055] 1 Kotatsu table 2 Top plate support 20 Top plate support body 21 Third coating layer 22 Fourth coating layer 23 screw holes 3 legs 31 1st leg 32 Second leg 4. Top plate 40 Top board body 41 First coating layer 42 Second coating layer 43 Female screw hole 5 screws 6 Heater

Claims

[Claim 1] a top plate support part equipped with a heater; a plurality of legs that support the tabletop support portion at a predetermined height; a top plate placed on the top plate support portion, The top plate has a top plate body, a first coating layer applied to the back surface of the top plate body, and a second coating layer applied to the front surface of the top plate body, The first coating layer contains fine particles for forming a rough surface that are heat resistant to the heat of the heater, and forms a rough surface on the back surface of the table top body to prevent the table top from slipping relative to the kotatsu futon. Kotatsu table.

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