Table for kotatsu

Abstract

To provide a table for kotatsu, a table which can suppress shift and play of a top board and which can likely to inexpensively maintain a cost of manufacture.SOLUTION: A table for kotatsu according to one aspect of the present invention is equipped with: a top board supporting part with a heater loaded; a plurality of leg parts for holding the top board supporting part at a prescribed height; and a top board which is placed on the top board supporting part. The top board is provided with a top board body, a first coating layer applied on a rear face of the top board body, and a second coating layer applied on a surface of the top board body. The first coating layer contains fine grains for forming a rough surface having heat resistance for heater heat and forms a rough surface on the rear face of the top board body.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] Conventionally, a kotatsu table is known that has a plurality of legs, a top plate support part that supports the top plate, and a top plate that is placed on the top plate support part. When the kotatsu table is used as a heating device, a kotatsu futon is placed on the top plate support part, and the top plate is placed on the kotatsu futon. When the kotatsu table is used as a heating device, if a user applies force to the top plate, the top plate may slide on the kotatsu futon and become misaligned. In response to this, a kotatsu table that prevents the top plate from being misaligned 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] Furthermore, Patent Document 2 discloses an anti-slip device for the top of a furniture-style kotatsu, which comprises a sheet made of a non-slip material such as synthetic rubber with protrusions attached, which is placed between the kotatsu futon and the top to stabilize the top. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2015-166651 A [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 quilt, or the mating recesses and protrusions may press against the kotatsu quilt to deform its shape, causing the top plate to wobble. Even in the kotatsu table using the non-slip top plate described in Patent Document 2, the top plate may wobble due to wear or falling off of some of the protrusions. In addition, the adoption of such special structures tends to increase manufacturing costs unnecessarily.

[0007] An object of one aspect of the present invention is to provide a kotatsu table that can prevent the top plate from shifting or rattling and that can easily be 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 part equipped with a heater, a plurality of legs supporting the top plate support part at a predetermined height, and a top plate placed on the top plate support part, the top plate having a top plate main body, a first coating layer applied to the rear surface of the top plate main body, and a second coating layer applied to the front surface of the top plate main body, the first coating layer containing fine particles for forming a rough surface that are heat resistant to the heat of the heater and forming a rough surface on the rear surface of the top plate main body. Effect of the Invention

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

[0010] [Figure 1] 1 is a perspective view of a kotatsu table according to one embodiment. FIG. [Diagram 2] FIG. 2 is an exploded perspective view of a kotatsu table according to one embodiment, seen from below. [Diagram 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. [Diagram 5] 11 is a cross-sectional view of the top board support portion taken perpendicular to the Y-axis. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, the embodiment of the present invention will be described with reference to the drawings. In order to facilitate understanding of the description, the same components in each drawing are given the same reference numerals, and duplicated description may be omitted. In this specification, the description may be given using a three-dimensional orthogonal coordinate system in three axial directions (X-axis, Y-axis, and Z-axis). 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 in 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 seen from below, Fig. 3 is an exploded perspective view of the kotatsu table according to one embodiment seen from above, and Fig. 4 is a cross-sectional view of the top plate perpendicular to the Y axis. As shown in Figs. 1 to 3, the kotatsu table 1 comprises a top plate support part 2 having a heater 6 mounted thereon, a plurality of legs 3 that support the top plate support part 2 at a predetermined height, and a top plate 4 placed on the top plate support part 2. As shown in Figs. 2 and 4, the top plate 4 has a top plate body 40, a first coating layer 41 applied to the back surface (lower surface) S1 of the top plate body 40, and a second coating layer 42 applied to the front surface (upper surface, or the surface of the top plate body 40 opposite to the top plate support part 2 side) S2 of the top plate body 40, and the first coating layer 41 contains fine particles for forming a rough surface that have heat resistance against the heat of the heater 6 and forms a rough surface on the back surface of the top plate body 40. Here, heat resistance against the heat of the heater 6 means heat resistance that does not deform 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 part 2 via an optional kotatsu futon. When the kotatsu table 1 is used as a table (when 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 lower surface S1 of the tabletop body 40, forms a rough surface on the lower surface S1 of the tabletop body 40, so that fine irregularities are formed on the lower surface S3 of the tabletop 4 by the fine particles for forming a rough surface, and the surface roughness of the lower surface S3 of the tabletop 4 can be increased compared to when the first coating layer 41 is not provided. Therefore, when the tabletop 4 is placed on the tabletop support part 2 via a kotatsu futon when the kotatsu table 1 is used as a heating appliance, the first coating layer 41 of the tabletop 4 and the kotatsu futon come into contact with each other, thereby preventing the tabletop 4 from slipping. In addition, since the first coating layer 41 is provided along the shape of the lower surface S1 of the tabletop body 40, the lower surface S3 of the tabletop 4 and the kotatsu futon can be brought into close contact with each other, and rattling of the tabletop 4 can be prevented. Furthermore, the kotatsu table 1 does not require a separate member to be provided on the lower surface S1 of the tabletop body 40, and the manufacturing cost can be easily kept low.

[0014] Furthermore, the top plate 4 is prevented from absorbing moisture from the outside and from evaporating moisture to the outside by coating the top plate body 40 on both sides, or more precisely, the entire periphery, with the above-mentioned 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 being longer than 1 m, and is heated by the heat generated by the heater 6 of the kotatsu, which may cause the top plate 4 to warp when 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 defects.

[0015] The tabletop body 40 and the tabletop support 2 are made of fiberboard, more specifically, formed by directly printing wood grain on MDF (Medium Density Fiberboard). The legs 3 are made of suitable wood. The first coating layer 41 and the second coating layer 42 can be coated by so-called UV coating or PU coating, but in this embodiment, UV coating is used. As described above, the tabletop body 40 is made of a material that undergoes dimensional changes due to the heat generated by the heater 6, specifically, a wooden material, and it is also possible to use solid wood, laminated wood, or laminated material instead of the above-mentioned MDF. The surface design treatment of the tabletop 4 can also be performed by attaching a decorative material such as a decorative sheet to the MDF instead of the above-mentioned direct printing.

[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, a triangle, a rectangle, a circle, an ellipse, 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 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 via the kotatsu futon, and allows the table top 4 and the kotatsu futon to be more closely attached to each other. Therefore, the kotatsu table 1 can further suppress the table top 4 from shifting and rattling.

[0018] When the top plate support part 2 is flat, the top plate support part 2 may have a pair of screw holes 23 arranged diagonally. A screw 5 can be inserted into the screw hole 23 from the lower surface S7 side of the top plate support part 2, and the screw 5 penetrates the screw hole 23. When the kotatsu table 1 is used as a table, the top plate 4 can be fixed to the top plate support part 2 by placing the top plate 4 directly on the top plate support part 2, inserting the screw 5 into the screw hole 23 from the lower surface S7 side of the top plate support part 2, and screwing the screw 5 into the female screw hole 43 arranged in the lower surface S3 of the top plate 4. 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 board support part 2 has a rectangular shape in plan view, the legs 3 are provided at the four corners of the bottom surface S7 of the top board support part 2. The shape of the legs 3 is not particularly limited, but may be, for example, a cylinder or a rectangular column. The legs 3 may have a first leg 31 having one end connected to the bottom surface S7 of the top board 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 long axis 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 the kotatsu table 1 can be changed, for example, when using the kotatsu table 1 while sitting on the floor, the height of the kotatsu table 1 can be lowered by removing the second leg 32 from the first leg 31, and when using the kotatsu table 1 while sitting on a chair, the height of the kotatsu table 1 can be increased by attaching the second leg 32 to the first leg 31. The second leg 32 can be detachable from the 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 removed from the first leg 31. Here, the height of the kotatsu table 1 means the distance from the lower end of the leg 3 to the upper surface S4 of the top plate 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 value of the height of the kotatsu table 1 can be, for example, 60 cm to 70 cm, and the minimum value 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 the 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 body 40 is flat. The planar shape of the top plate body 40 is not particularly limited, and may be, for example, a triangle, a rectangle, a circle, an ellipse, or the like. When the planar shape of the top plate body 40 is a triangle or a rectangle, the top plate body 40 may have rounded corners. The planar shape of the top plate body 40 may be the same as the planar shape of the top plate support part 2, or may be a similar shape to the planar shape of the top plate support part 2. When the planar shape of the top plate body 40 is a similar shape to the planar shape of the top plate support part 2, the periphery of the top plate body 40 is located outside the periphery of the top plate support part 2 in the planar view.

[0023] The top plate 4 may have a frame portion (not shown) that covers the side surface of the top plate main body 40, the peripheral portion of the upper surface S4, and the peripheral portion 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 screwed 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 a 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 in an area other than the projection area of ​​the tabletop support part 2 on the underside of the tabletop main body 40 in a 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 a light 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 via a kotatsu futon, the fibers of the kotatsu futon are easily caught in the first coating layer 41, and the kotatsu table 1 can further suppress the slippage of the top plate 4. Furthermore, the kotatsu table 1 can suppress the slippage of the top plate 4 regardless of the type or fiber diameter of the fiber used in the kotatsu futon.

[0027] The average particle diameter of the fine particles for forming a rough surface contained in the first coating layer 41 is preferably 0.5 μm or more and 50 μm or less, more preferably 1 μm or more and 40 μm or less, and even more preferably 1.5 μm or more and 30 μm or less. In this embodiment, the average particle diameter is specifically set to a range of 10 μm or more and 15 μm or less. In this specification, the average particle diameter of the fine particles for forming a rough surface used in the first coating layer 41 refers to the average particle diameter in a form in which the particles exist stably, and may be, for example, either the average particle diameter of independent primary particles or the average particle diameter of secondary particles (aggregated particles) formed by tightly agglomerating primary particles. The average particle diameter can be measured, for example, by a laser diffraction / scattering device or a Coulter counter device. Since the average particle diameter of the fine particles for forming a 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 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 better prevent the top plate 4 from shifting.

[0028] The material constituting the fine particles for forming a rough surface is preferably a material having a melting point of 400° C. or more and a relatively high hardness. The fine particles for forming a rough surface may be a ceramic powder. Specifically, examples of the material 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, magnesium hydroxide, and the like. Among these, the fine particles for forming a rough surface are preferably made of silicon dioxide. Since silicon dioxide has excellent heat resistance, a relatively high hardness, and is colorless and transparent, the first coating layer 41 can maintain the fine unevenness even when subjected to heat from the heater 6 or external force while maintaining the appearance of the top plate body 40. Therefore, the kotatsu table 1 can further suppress the displacement of the top plate 4 without impairing the appearance of the top plate 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 synthetic resin materials. The synthetic resin material may be, for example, one or more 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 and epoxy acrylate resin. This makes it possible to suppress the detachment of the fine particles for forming a rough surface in the first coating layer 41 even if 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 top plate 4, an object placed on the top plate 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. 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, and even more preferably 15% by mass to 40% by mass. Since 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, the fine particles for forming a rough surface can be well dispersed in the synthetic resin materials, and the fine particles for forming a rough surface can form unevenness over the entire first coating layer 41. Therefore, the kotatsu table 1 can further suppress 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 suppression of the displacement of the top plate 4.

[0032] The second coating layer 42 contains the same synthetic resin material as that 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 tabletop 4 to have similar durability, and the lower surface S3 of the tabletop 4 can also have the function of suppressing the misalignment of the tabletop 4.

[0033] 5 is a cross-sectional view of the top plate support part perpendicular to the Y axis. As shown in FIG. 3 and FIG. 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, since 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, fine unevenness is formed on the upper surface S8 of the top plate support part 2 by the fine particles for forming a rough surface, 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 via the kotatsu futon, the first coating layer 41 of the top plate 4 and the third coating layer 21 of the top plate support part 2 come into contact with the kotatsu futon, thereby 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. In addition, since the first coating layer 41 is provided along the shape of the lower surface 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 facing the top plate 4, the top plate 4 and the top plate support part 2 can be brought into close contact with the kotatsu futon, and rattling of the top plate 4 can be further prevented.

[0034] Specifically, the third coating layer 21 is preferably provided on the surface of the table top support body 20 facing 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 facing the table top 4 in a plan view. As a result, when the table top 4 is placed on the table top support part 2 via a kotatsu futon when the kotatsu table 1 is used as a heating appliance, 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, and the shifting of the table top 4 can be further suppressed.

[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. Since 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 via a kotatsu futon, the fibers of the kotatsu futon are easily caught in the third coating layer 21, and the kotatsu table 1 can further suppress the shifting of the top plate 4. Furthermore, the kotatsu table 1 can suppress the shifting of the top plate 4 regardless of the type or fiber diameter of the fiber used in the kotatsu futon.

[0036] Moreover, the third coating layer 21 may have the same configuration as the above-mentioned first coating layer 41. Thereby, the third coating layer 21 can 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 to the table top 4 side, and the fourth coating layer 22 contains the same synthetic resin material as the synthetic resin material 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 the lower surface S7 of the table top support part 2 to have the same durability, and the upper surface S8 of the table top support part 2 can further have the function of suppressing the slippage of the table top 4 and the kotatsu futon. The fourth coating layer 22 may contain the same synthetic resin material as the synthetic resin material contained in the first coating layer 41.

[0038] Next, an example of a manufacturing method of the kotatsu table 1 of this embodiment will be described. The manufacturing method of the kotatsu table 1 of this embodiment includes a step of preparing the top plate 4 and a step of attaching the legs 3 to the top plate support part 2, and the step of preparing the top plate 4 includes a step of forming a first coating layer 41 containing fine particles for forming a rough surface on the lower surface S1 of the top plate main body 40, and a step of forming a second coating layer 42 not containing the fine particles for forming a rough surface contained in the first coating layer 41 on the surface S2 of the top plate main body 40 opposite to the top plate 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 similar to 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, brushing, 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 above-mentioned kotatsu table 1, and therefore a description thereof will be omitted.

[0042] The second coating layer 42 contains the same synthetic resin material as that 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 for the kotatsu table 1 of this embodiment, the upper surface S4 and the lower surface S3 of the top plate 4 can have the same durability, and the lower surface S3 of the top plate 4 can also have the function of suppressing the slippage of the top plate 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 application amount 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. EXAMPLES

[0044] The present invention will be described below with reference to specific examples, but is not limited to these examples.

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

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

[0047] Coating solution 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. 2Coating solution A was applied to the first coating layer at a rate of 20 g / m2 and then irradiated with ultraviolet light from a UV lamp to harden the applied coating solution A, forming a first coating layer. 2 Coating solution A was applied to the second coating layer at a coating amount of 7 g / m2 and then irradiated with ultraviolet light from a UV lamp to harden the applied coating solution A, forming a second coating layer. 2 Then, ultraviolet light was applied from a UV lamp 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 as the coating method.

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

[0049] (Creating the tabletop support) A coating layer having a thickness of 80 μm was formed on one surface (surface S6) of the top plate support body having dimensions of 1140 mm × 690 mm × 24 mm, in the same manner as the top plate, using coating liquid A. Next, a coating layer having 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) A planar profile was measured in a 2.5 mm x 2.5 mm area on the surface of the coating layer of each of the top plate and the top plate support using an optical interference surface roughness measuring device (model: VS1800, manufactured by Hitachi High-Tech Corporation). From the obtained planar profile, the arithmetic mean roughness (Ra) was calculated based on JIS B 0601:2013. The arithmetic mean roughness of the coating layer of the top plate (surface S3) and the top plate support (surface S8) of Example 1 was 7.716 μm and 7.750 mm, respectively, and the arithmetic mean roughness of the coating layer of the top plate (surface S3) and the top plate support (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 surface, and the edge of the kotatsu futon was 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 when the top plate started 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 top plate support part was similarly measured, and the static friction coefficient was calculated. The static friction coefficients of the top plate (surface S3) and the 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 the top plate support part (surface S8) of Comparative Example 1 were 0.31 and 0.37, respectively.

[0054] Although the embodiment has been described above, the above embodiment is presented as an example, and the present invention is not limited to the above embodiment. The above embodiment can be implemented in various other forms, and various combinations, omissions, substitutions, modifications, etc. can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the scope of the invention and its equivalents described in the claims. [Explanation of symbols]

[0055] 1 Kotatsu table 2 Top board support 20 Top plate support body 21 3rd coating layer 22 4th coating layer 23 Screw hole 3 legs 31 1st leg 32 Second leg 4. Tabletop 40 Top plate body 41 First coating layer 42 Second Coating Layer 43 Female screw hole 5 Screws 6 Heater

Claims

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 tabletop has a tabletop body, a first coating layer applied to the back surface of the tabletop body, and a second coating layer applied to the front surface of the tabletop 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 rear surface of the table top body.

2. 2. The kotatsu table according to claim 1, wherein the first coating layer has an arithmetic mean roughness of 4 μm or more and 100 μm or less.

3. 3. The kotatsu table according to claim 2, wherein the fine particles for forming a rough surface have an average particle size of 0.5 μm or more and 50 μm or less.

4. The first coating layer is made of a coating film containing a synthetic resin material, The kotatsu table according to claim 1 , wherein the content of the fine particles for forming a rough surface is 10% by mass or more and 60% by mass or less with respect to the total mass of the first coating layer.

5. 2. The kotatsu table according to claim 1, wherein the first coating layer has a thickness of 16 μm or more and 400 μm or less.

6. 2. The kotatsu table according to claim 1, wherein the second coating layer is made of a paint film containing a synthetic resin material and does not contain the fine particles for forming the rough surface.

7. The kotatsu table according to claim 1, wherein the tabletop support portion has a tabletop support body and a third coating layer containing fine particles for forming a rough surface, the third coating layer being provided on the surface of the tabletop support body facing the tabletop.

Images