Bathroom bed

Abstract

To provide a bathroom floor capable of satisfying both a drainage property and designability.SOLUTION: The bathroom floor includes a resin layer having a pattern layer. The resin layer has unevenness formed on its surface. The unevenness has a plurality of recesses, and a plurality of protrusions with an outer circumference surrounded by at least one of the recess, a bathroom wall, a drain, a bathtub, and a bathroom door in top view. The pattern layer has a pattern, and is arranged above or below the recesses and the protrusions. A minimum luminance value of shadow of the unevenness in the top view is greater than or equal to a minimum luminance value of the pattern in the top view.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] Aspects of the present invention generally relate to bathroom floors.

Background Art

[0002] Conventionally, in bathroom floors, it is known to provide regular concavities and convexities on the surface for drainage (for example, Patent Document 1). On the other hand, in recent years, in order to improve the design, providing a pattern on the surface of the bathroom floor has been considered. However, if only regular concavities and convexities as in the past are provided on the surface of the bathroom floor with a pattern, the design of the pattern may be impaired. In particular, when only regular concavities and convexities are provided on the surface of a bathroom floor with a pattern of a natural texture such as a wood grain or a stone grain, there is a problem that the reality of the pattern is impaired and sufficient design cannot be obtained.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Aspects of the present invention have been made based on the recognition of such problems, and an object thereof is to provide a bathroom floor that can achieve both drainage performance and design.

Means for Solving the Problems

[0005] The first invention is a bathroom floor comprising a resin layer having a patterned layer, wherein the resin layer has irregularities on its surface, the irregularities comprising recesses and protrusions whose outer periphery is surrounded by at least one of the recesses, the bathroom wall, the drain, the bathtub, and the bathroom door in a top view, the patterned layer having a pattern and being positioned above or below the recesses and the protrusions, and the minimum luminance value of the shadows of the irregularities in a top view being greater than or equal to the minimum luminance value of the pattern in a top view.

[0006] According to this bathroom floor, in a resin layer with a textured surface and a pattern layer above or below the recesses and protrusions, the minimum brightness value of the shadows of the textures in a top view is made greater than or equal to the minimum brightness value of the pattern in a top view. This makes the part of the pattern with the lowest brightness value (i.e., the darkest part of the pattern) darker than the part of the shadows of the textures with the lowest brightness value (i.e., the darkest part of the shadows of the textures). In other words, the darkness of the pattern makes the darkness of the shadows of the textures less noticeable. This allows for improved design while maintaining drainage through the textures, making the textures less visible to the user. In short, it is possible to achieve both drainage and design in a bathroom floor.

[0007] The second invention is a bathroom floor characterized in that, in the first invention, N 200 mm square shooting areas (where N is an integer of 9 or more) arranged so as not to overlap each other when viewed from above the resin layer are photographed at a resolution where 1 pixel is 1 mm, and the N images obtained are converted to grayscale, and the brightness values ​​of the pixels in the convex regions of the grayscale converted images are divided into 256 equal parts of relative brightness from 0 to 255, and the region where the relative brightness is 0 or more and 25 or less is called the first region, the region where the relative brightness is 26 or more and 230 or less is called the second region, and the region where the relative brightness is 231 or more and 255 or less is called the third region, the number of pixels in the second region exceeds 50% of the sum of the number of pixels in the first region, the number of pixels in the second region, and the number of pixels in the third region, and the standard deviation calculated from the brightness values ​​of the pixels in the convex regions of each of the N images is taken as the first standard deviation, and the standard deviation of the N first standard deviations is taken as the second standard deviation, and the second standard deviation is 1 or less.

[0008] Because the shadows created by the uneven surface have a gradient, the histogram of the brightness values ​​of the shadows of the uneven surface tends to have a high proportion of intermediate colors. With this bathroom floor, by adopting a pattern with a high proportion of intermediate colors, such that the number of pixels in the second region of intermediate colors exceeds 50% of the total number of pixels (the sum of the number of pixels in the first region which is closer to black, the number of pixels in the second region which is closer to intermediate colors, and the number of pixels in the third region which is closer to white), the characteristics of the pattern's shading can be made to resemble the characteristics of the shading of the uneven surface. This makes the shadows of the uneven surface appear as a pattern, making the uneven surface less noticeable. In addition, in order to obtain sufficient drainage, it is preferable to form the uneven surface evenly across the entire surface of the resin layer. With this bathroom floor, by making the standard deviation of the standard deviation of the brightness values ​​corresponding to N shooting areas (first-order standard deviation) (second-order standard deviation) less than 1, the shading of the pattern can be made more uniform across the entire surface of the resin layer. This makes it possible to superimpose a pattern with suppressed shading bias onto the uneven surface that is formed evenly across the entire surface of the resin layer, making the uneven surface less noticeable across the entire surface of the resin layer while maintaining drainage due to the uneven surface.

[0009] The third invention is a bathroom floor in which, in the first invention, the unevenness comprises a plurality of protrusions, each having an arbitrary protrusion and an adjacent protrusion adjacent to the arbitrary protrusion in a top view, and the shape of the adjacent protrusion in a top view is different from the shape of the arbitrary protrusion in a top view.

[0010] The shadows cast by uneven surfaces are determined by their shape; therefore, if the shape of the uneven surfaces is regular, the shadows will also be regular. On the other hand, natural textures such as wood grain and stone patterns, which are popular for bathroom floors, are irregular. When uneven surfaces with regular shapes are superimposed on natural textures, the shadows of the uneven surfaces become more noticeable. With this bathroom floor, the shape of adjacent raised areas when viewed from above differs from the shape of any given raised area when viewed from above, making the shadows of the uneven surfaces irregular. This allows for drainage through the uneven surfaces while making the uneven surfaces less noticeable when superimposed on natural textures.

[0011] The fourth invention is a bathroom floor characterized in that, in the first invention, the unevenness comprises a plurality of protrusions, each having an arbitrary protrusion and an adjacent protrusion adjacent to the arbitrary protrusion in a top view, the shape of the adjacent protrusion in a top view being obtained by rotating the shape of the arbitrary protrusion in a top view around the vertical axis, or a mirror image of the shape of the arbitrary protrusion in a top view, and the size of the adjacent protrusion in a top view being the same as the size of the arbitrary protrusion in a top view.

[0012] The shadows cast by uneven surfaces are determined by their shape; therefore, if the shape of the uneven surfaces is regular, the shadows will also be regular. On the other hand, natural textures such as wood grain and stone patterns, which are popular for bathroom floors, are irregular. When uneven surfaces with regular shapes are superimposed on natural textures, the shadows of the uneven surfaces become more noticeable. With this bathroom floor, the shape of adjacent protrusions in a top view is either the shape of an arbitrary protrusion in a top view rotated around the vertical axis, or a mirror image of the shape of an arbitrary protrusion in a top view. By making the size of adjacent protrusions in a top view the same as the size of an arbitrary protrusion in a top view, the shadows of the uneven surfaces can be made irregular. This allows for drainage through the uneven surfaces while making the uneven surfaces less noticeable when superimposed on natural textures.

[0013] The fifth invention is a bathroom floor characterized in that, in the first invention, the unevenness comprises a plurality of protrusions, each having an arbitrary protrusion and an adjacent protrusion adjacent to the arbitrary protrusion in a top view, the shape of the adjacent protrusion in a top view being the same as the shape of the arbitrary protrusion in a top view, and the size of the adjacent protrusion in a top view being different from the size of the arbitrary protrusion in a top view.

[0014] The shadows cast by uneven surfaces are determined by their shape; therefore, if the shape of the uneven surfaces is regular, the shadows will also be regular. On the other hand, natural textures such as wood grain and stone patterns, which are popular for bathroom floors, are irregular. When uneven surfaces with regular shapes are superimposed on natural textures, the shadows of the uneven surfaces become more noticeable. With this bathroom floor design, the shape of adjacent protrusions in a top view is made the same as the shape of any given protrusion in a top view, while the size of adjacent protrusions in a top view differs from the size of any given protrusion in a top view. This makes the shadows of the uneven surfaces less noticeable when they are superimposed on natural textures, while still providing drainage properties through the uneven surfaces.

[0015] The sixth invention is a bathroom floor in which, in the fifth invention, the shape of the adjacent protrusions in a top view is obtained by rotating the shape of the arbitrary protrusion in a top view around the vertical axis, or is a mirror image of the shape of the arbitrary protrusion in a top view.

[0016] This bathroom floor design allows for a more irregular shading pattern of unevenness by making the size of adjacent protrusions in a top view different from the size of any arbitrary protrusion in a top view, and by making the shape of adjacent protrusions in a top view either rotated around the vertical axis or a mirror image of the shape of any arbitrary protrusion in a top view. This allows for drainage through unevenness while making the unevenness less noticeable when superimposed on a natural texture pattern.

[0017] The seventh invention is a bathroom floor characterized in that, in any one of the third to sixth inventions, the shape of at least one of the protrusions in a top view includes a curve.

[0018] According to this bathroom floor design, the shape of at least one of the protrusions in a top view includes a curve, which allows for drainage through the uneven surface while matching the appearance of the unevenness to a natural texture pattern with fewer straight lines, making the unevenness less noticeable.

[0019] The eighth invention is a bathroom floor characterized in that, in any one of the first to sixth inventions, the convex portion and the recessed portion surrounding at least a part thereof, the recessed portion has a bottom portion located at the lowest point and a first curved portion located between the bottom portion and the convex portion, with the center of the radius of curvature located on the recessed portion side, and the convex portion has a top portion located at the highest point and a second curved portion located between the top portion and the first curved portion, with the center of the radius of curvature located on the convex portion side, and the radius of curvature of the second curved portion is greater than or equal to the radius of curvature of the first curved portion.

[0020] When light shines on the concavities and convexities, highlights can be formed on the second curved portion, and the gradation width of the highlights of the concavities and convexities is determined by the shape of the second curved portion of the convex portion. That is, when the radius of curvature of the second curved portion is small, the gradation width of the highlights becomes small and the highlights are distinct. On the other hand, since natural texture patterns such as wood grain and stone grain, which are popular as patterns for bathroom floors, have a matte texture, when a natural texture pattern is combined with concavities and convexities with distinct highlights, it may appear to have a glossy feeling, and the reality of the natural texture pattern may be impaired. According to this bathroom floor, by making the radius of curvature of the second curved portion equal to or greater than the radius of curvature of the first curved portion, while providing drainage performance due to the concavities and convexities, the gradation width of the highlights is made as large as possible, and the highlights of the concavities and convexities are made less prominent, thereby maintaining the reality of the natural texture pattern.

[0021] A ninth invention is a bathroom floor according to the second invention, characterized in that the resin layer has a line that divides the pattern.

[0022] According to this bathroom floor, by providing a line in the resin layer that divides the pattern, while providing drainage performance due to the concavities and convexities, it can be made to appear as if genuine material tiles (for example, stone tiles) are laid, and the user's line of sight can be focused on a line that is more prominent than the shadow of the concavities and convexities, making the concavities and convexities less prominent.

[0023] A tenth invention is a bathroom floor according to any one of the first to sixth inventions, characterized in that it further includes a cushion layer provided under the resin layer and capable of elastic deformation.

[0024] According to this bathroom floor, by providing an elastic deformation-capable cushion layer under the resin layer, the cushion performance of the bathroom floor can be improved. Thereby, it is possible to suppress damage to an article when it is dropped on the bathroom floor.

[0025] The 11th invention is a bathroom floor characterized in that, in any one of the 1st to 6th inventions, a coating layer containing transparent fine particles is further provided on the resin layer.

[0026] According to this bathroom floor, by providing a coating layer containing transparent fine particles on the resin layer, the texture of the pattern can be made matte, and the reality of the pattern can be enhanced. Furthermore, while providing drainage, it is also possible to provide an anti-slip function when the user uses the bathroom.

Effects of the Invention

[0027] According to an aspect of the present invention, it is possible to provide a bathroom floor that can achieve both drainage and design.

Brief Description of the Drawings

[0028] [Figure 1] It is a perspective view showing a bathroom unit equipped with a bathroom floor according to an embodiment. [Figure 2] FIGS. 2(a) and 2(b) are a plan view and a cross-sectional view showing a part of the bathroom floor according to an embodiment. [Figure 3] FIGS. 3(a) and 3(b) are enlarged cross-sectional views showing a part of the bathroom floor according to an embodiment. [Figure 4] FIGS. 4(a) and 4(b) are explanatory views showing the measurement conditions of luminance values. [Figure 5] FIGS. 5(a) and 5(b) are an example of a histogram showing the distribution of luminance values of a pattern image and an example of a histogram showing the distribution of luminance values of a concavo-convex shadow image. [Figure 6] FIGS. 6(a) and 6(b) are a plan view showing an example of a resin layer according to an embodiment and a histogram showing the distribution of luminance values in this resin layer. [Figure 7] FIGS. 7(a) and 7(b) are a plan view showing an example of a resin layer according to a reference example and a histogram showing the distribution of luminance values in this resin layer. [Figure 8] FIGS. 8(a) to 8(c) are plan views showing an example of a resin layer according to an embodiment. [Figure 9] Figures 9(a) to 9(c) are plan views showing an example of the shape of the convex portion when viewed from above. [Figure 10] Figures 10(a) and 10(b) are plan views showing an example of the shape of the convex portion when viewed from above. [Figure 11] Figures 11(a) and 11(b) are plan views showing an example of the shape of the convex portion when viewed from above. [Figure 12] Figures 12(a) and 12(b) are plan views showing an example of the shape of the convex portion when viewed from above. [Figure 13] Figures 13(a) and 13(b) are plan views showing an example of the shape of the convex portion in a top view. [Figure 14] Figures 14(a) to 14(c) are plan views showing an example of the shape of the convex portion when viewed from above. [Figure 15] This is a plan view showing an example of the shape of a convex portion when viewed from above. [Figure 16] Figures 16(a) and 16(b) are plan views showing an example of the shape of the convex portion when viewed from above. [Figure 17] Figures 17(a) to 17(g) are explanatory diagrams showing the size of the protrusions. [Figure 18] This is a plan view showing a bathroom floor according to a modified embodiment. [Figure 19] Figures 19(a) and 19(b) are a plan view and a cross-sectional view, respectively, showing a part of the bathroom floor according to a modified example of the embodiment. [Figure 20] Figures 20(a) and 20(b) are schematic cross-sectional views showing the cross-sectional shape of the resin layer according to a modified embodiment. [Modes for carrying out the invention]

[0029] The embodiments will be described below with reference to the drawings. In each drawing, similar components are denoted by the same reference numerals, and detailed descriptions will be omitted as appropriate. Figure 1 is a perspective view showing a bathroom unit with a bathroom floor according to the embodiment. As shown in Figure 1, the bathroom unit 500 according to this embodiment includes a bathroom floor 100, a bathtub 200, wall panels 300a to 300f, and a lighting device 400.

[0030] The bathtub 200 is installed on a mounting surface (for example, the floor of a building) S via support legs 210. The support legs 210 are located near the four corners on the underside of the bottom of the bathtub 200. A bolt is provided at the tip (lower end) of each support leg 210, and the height of the support leg 210 can be adjusted by rotating this bolt.

[0031] The bathroom floor 100 is installed on the mounting surface S via support legs 110. The bathroom floor 100 is installed next to the bathtub 200. The support legs 110 are provided on the underside of the bottom of the bathroom floor 100. A bolt is provided at the tip (lower end) of the support leg 110, and the height of the support leg 110 can be adjusted by rotating the bolt.

[0032] The surface 100a of the bathroom floor 100 has waterproof properties to prevent water from leaking outside the bathroom. In this specification, the term "water" includes not only cold water but also heated water.

[0033] A drain pipe 220 is provided near the boundary with the bathtub 200 on the underside (downward side) of the bathroom floor 100. A drain opening 100h is formed in the bathroom floor 100 near the boundary with the bathtub 200, and communicates with the drain pipe 220. The drain opening 100h may be covered with a removable lid. The area where the drain opening 100h is provided is recessed downwards, and the surface 100a of the bathroom floor 100 has a drainage slope that slopes downwards toward the drain opening 100h. In addition, a drain opening (not shown) provided at the bottom of the bathtub 200 is also connected to the drain pipe 220.

[0034] As shown by the dashed line in Figure 1, wall panels 300a to 300c are installed on the rim of the bathtub 200. Additionally, wall panels 300d to 300f are installed on the periphery of the bathroom floor 100. A bathroom door is attached to wall panel 300f via a door mounting frame (not shown).

[0035] A bath apron 230 is provided at the boundary between the bathtub 200 and the bathroom floor 100, covering the side of the bathtub 200 that faces the bathroom floor 100. Note that depending on the structure of the bathtub 200, a bath apron 230 may not be necessary.

[0036] Furthermore, a small panel 240 is provided between one longitudinal end of the bath apron 230 and the wall panel 300d. Also, a small panel 250 is provided between the other longitudinal end of the bath apron 230 and the wall panel 300f. The small panels 240 and 250 are provided as needed and can be omitted.

[0037] In this specification, the direction from wall panel 300f toward wall panel 300d is referred to as "front," the direction from wall panel 300d toward wall panel 300f is referred to as "rear," the direction from wall panel 300e toward wall panel 300b is referred to as "left side," and the direction from wall panel 300b toward wall panel 300e is referred to as "right side."

[0038] Figures 2(a) and 2(b) are a plan view and a cross-sectional view showing a part of the bathroom floor according to the embodiment. Figures 3(a) and 3(b) are enlarged cross-sectional views showing a portion of the bathroom floor according to the embodiment. Figure 2(a) is an enlarged view of region A shown in Figure 1. Figure 2(b) is a cross-sectional view taken along the line B1-B2 shown in Figure 2(a). Figure 3(a) is a schematic enlarged view of region C shown in Figure 2(b). Figure 3(b) is an enlarged view of region D shown in Figure 2(b). As shown in Figures 2(a) and 2(b), the bathroom floor 100 according to this embodiment comprises a resin layer 10 and a cushion layer 20.

[0039] The surface 10a of the resin layer 10 is provided with irregularities 10b. Furthermore, the resin layer 10 has a pattern. A "pattern" is a design represented by two or more colors. In other words, the resin layer 10 has multiple parts of different colors. The pattern is, for example, a non-geometric design. The resin layer 10 contains resin.

[0040] In this example, the resin layer 10 has a main body portion 11 and a handle layer 12. The surface 11a of the main body portion 11 is provided with irregularities 11b. The handle layer 12 is provided on the main body portion 11 along the irregularities 11b of the main body portion 11. In other words, the surface 12a of the handle layer 12 is provided with irregularities 12b that are in line with the irregularities 11b of the main body portion 11. In this example, the irregularities 12b of the handle layer 12 correspond to the irregularities 10b of the resin layer 10.

[0041] The pattern layer 12 has a pattern. In other words, in this example, the main body 11 that imparts the uneven surface 10b to the resin layer 10 and the pattern layer 12 that imparts the pattern to the resin layer 10 are provided separately. The pattern layer 12 may be formed by being attached to the main body 11, or by being printed on the main body 11 by inkjet printing or the like. The pattern layer 12 may be a single layer or a structure in which multiple layers are laminated. In the case of a structure in which multiple layers are laminated, the patterns of each layer may be the same or different. Also, in the case of a structure in which multiple layers are laminated, the method of forming each layer may be the same or different. For example, a layer formed by attaching a film and a layer formed by inkjet printing may be laminated.

[0042] Furthermore, the pattern layer 12 is provided above or below the main body 11. In this example, the pattern layer 12 is provided above the main body 11. If the main body 11 is light-transmitting, the pattern layer 12 may be provided below the main body 11. In this case, the surface 11a of the main body 11 corresponds to the surface 10a of the resin layer 10.

[0043] The uneven surface 10b of the resin layer 10 has recesses 50 and protrusions 60. The recesses 50 are recessed downwards and communicate with the drain 100h. The recesses 50 branch and merge in a planar direction perpendicular to the vertical direction to form the protrusions 60, which are the parts other than the recesses 50. In other words, in a top view, at least a part of the outer circumference of the protrusions 60 is surrounded by the recesses 50. To put it another way, the recesses 50 are located between two adjacent protrusions 60. The outer circumference of each protrusion 60 is surrounded by at least one of the recesses 50, the bathroom walls (300d~300f), the drain 100h, the bathtub 200, and the bathroom door. The width of the recesses 50 is, for example, 0.5 mm to 2.5 mm. The shape and arrangement of the protrusions 60 will be described later. The pattern layer 12 is provided above or below the recesses 50 and protrusions 60.

[0044] The cushion layer 20 is provided beneath the resin layer 10. The cushion layer 20 is elastically deformable. The cushion layer 20 provides cushioning to the bathroom floor 100. The cushion layer 20 includes, for example, a foamed resin.

[0045] By providing the cushioning layer 20, the cushioning properties of the bathroom floor 100 can be improved. This reduces the risk of damage to objects dropped onto the bathroom floor 100. The cushioning layer 20 can be provided as needed and is optional.

[0046] The bathroom floor 100 may further include a base layer provided beneath the cushion layer 20, or a metal frame provided beneath the base layer.

[0047] As shown in Figure 3(a), the recess 50 is the portion located below the reference plane RP. The convex portion 60 is the portion located above the reference plane RP. The recess 50 has, for example, a bottom portion 51 and a first curved portion 52. The bottom portion 51 is located at the very bottom of the recess 50. The first curved portion 52 is located between the bottom portion 51 and the convex portion 60. The first curved portion 52 forms a curved inclined surface extending from the bottom portion 51 to the convex portion 60. The center C1 of the radius of curvature of the first curved portion 52 is located on the recess 50 side. That is, the first curved portion 52 is curved so as to be convex downwards in cross-sectional view. The convex portion 60 has, for example, a top portion 61 and a second curved portion 62. The top portion 61 is located at the very top of the convex portion 60. The second curved portion 62 is located between the top portion 61 and the first curved portion 52. The second curved section 62 forms a curved inclined surface extending from the apex 61 to the first curved section 52 (recess 50). The center C2 of the radius of curvature of the second curved section 62 is located on the convex section 60 side. That is, the second curved section 62 is curved so as to be convex upward in cross-sectional view. The reference plane RP is located in the vertical center between the bottom 51 and the apex 61. In other words, the distance between the bottom 51 and the reference plane RP is equal to the distance between the apex 61 and the reference plane RP.

[0048] The first curved portion 52 is curved with a radius of curvature r1 in cross-sectional view. The second curved portion 62 is curved with a radius of curvature r2 in cross-sectional view. Preferably, the radius of curvature r2 is greater than or equal to the radius of curvature r1. More preferably, the radius of curvature r2 is greater than the radius of curvature r1. For example, the radius of curvature r1 is 0.5 mm or more and 15 mm or less. For example, the radius of curvature r2 is 10 mm or more and 25 mm or less.

[0049] When light hits the uneven surface 10b, a highlight is created on the second curved section 62, and the gradient width of the highlight on the uneven surface 10b is determined by the shape of the second curved section 62 of the convex section 60. That is, when the radius of curvature r2 of the second curved section 62 is small, the gradient width of the highlight becomes small, and the highlight becomes clearer. On the other hand, natural texture patterns such as wood grain and stone patterns, which are popular as patterns for bathroom floors 100, often have a matte texture, so if a natural texture pattern is combined with the uneven surface 10b, which has a clear highlight, it may appear glossy, and the realism of the natural texture pattern may be lost. Therefore, by making the radius of curvature r2 of the second curved section 62 greater than or equal to the radius of curvature r1 of the first curved section 52, it is possible to maintain the drainage function provided by the uneven surface 10b while making the gradient width of the highlight as large as possible, and thus making the highlight on the uneven surface 10b less noticeable, thereby maintaining the realism of the natural texture pattern.

[0050] In this example, an inclined surface 55 is provided between the first curved section 52 and the second curved section 62, extending in a straight line in cross-sectional view. The inclined surface 55 can be provided as needed and is optional. In other words, the first curved section 52 and the second curved section 62 may be continuous.

[0051] As shown in Figure 3(b), a coating layer 30 is provided on the resin layer 10. The coating layer 30 has, for example, transparent fine particles 31 and a hydrophilic layer 33. The transparent fine particles 31 are, for example, acrylic particles. The particle size of the transparent fine particles 31 is, for example, 5 μm to 200 μm. The hydrophilic layer 33 is provided on the pattern layer 12. The hydrophilic layer 33 contains, for example, sulfonic acid. The transparent fine particles 31 are provided inside the hydrophilic layer 33. The transparent fine particles 31 give fine irregularities to the surface 100a of the bathroom floor 100.

[0052] By providing a coating layer 30 containing transparent fine particles 31, the texture of the pattern can be made matte, enhancing the realism of the pattern. Furthermore, it can provide drainage while also serving as an anti-slip function for users when using the bathroom. The coating layer 30 can be provided as needed and is optional.

[0053] Figures 4(a) and 4(b) are explanatory diagrams illustrating the measurement conditions for luminance values. Figures 5(a) and 5(b) show examples of histograms representing the distribution of luminance values ​​for patterned images and relief-shaded images, respectively. Information taken in through the eyes is processed as two-dimensional information in the brain. Humans perceive the appearance and texture of patterns in three-dimensional reality through the shading of patterns, the intensity and size of shadows and depressions, and other image luminance values. As shown in Figure 4(a), the luminance values ​​of the pattern on the resin layer 10 and the luminance values ​​of the shadows of the uneven surfaces 10b in a top view are determined from images taken of multiple measurement areas on the resin layer 10. The multiple measurement areas include N measurement areas of 200 mm square (where N is an integer between 9 and 17) that are arranged so as not to overlap each other in a top view. The following describes the case in which luminance values ​​are obtained from images taken of 17 measurement areas (measurement areas 1 to 17, MR1 to MR17).

[0054] The first measurement area MR1 includes the center of the resin layer 10 in both the front-to-back and left-to-right directions. The second measurement area MR2, third measurement area MR3, fourth measurement area MR4, fifth measurement area MR5, sixth measurement area MR6, seventh measurement area MR7, eighth measurement area MR8, and ninth measurement area MR9 are each arranged around the first measurement area MR1, adjacent to the first measurement area MR1. Hereinafter, the first to ninth measurement areas MR1 ​​to MR9 will be referred to as the central measurement area CM.

[0055] The tenth measurement area MR10 includes the center in the front-rear direction between the rear end of the resin layer 10 and the rear end of the central measurement section CM, and is positioned to overlap with the first measurement area MR1 in the front-rear direction. The eleventh measurement area MR11 includes the center in the front-rear direction between the front end of the resin layer 10 and the front end of the central measurement section CM, and is positioned to overlap with the first measurement area MR1 in the front-rear direction.

[0056] The 12th measurement area MR12 includes the center in the left-right direction between the left edge of the resin layer 10 and the left edge of the central measurement area CM, and is positioned to overlap with the first measurement area MR1 in the left-right direction. The 13th measurement area MR13 includes the center in the left-right direction between the right edge of the resin layer 10 and the right edge of the central measurement area CM, and is positioned to overlap with the first measurement area MR1 in the left-right direction.

[0057] The 14th measurement area MR14 is positioned to overlap with the 10th measurement area MR10 in the left-right direction and with the 12th measurement area MR12 in the front-back direction. The 15th measurement area MR15 is positioned to overlap with the 11th measurement area MR11 in the left-right direction and with the 12th measurement area MR12 in the front-back direction. The 16th measurement area MR16 is positioned to overlap with the 10th measurement area MR10 in the left-right direction and with the 13th measurement area MR13 in the front-back direction. The 17th measurement area MR17 is positioned to overlap with the 11th measurement area MR11 in the left-right direction and with the 13th measurement area MR13 in the front-back direction.

[0058] The number of measurement areas can be changed, for example, depending on the size of the bathroom floor. In this embodiment, it is sufficient to measure at least nine measurement areas (central measurement area CM), namely the first to ninth measurement areas MR1 ​​to MR9. If the bathroom floor is small and measurement areas cannot be secured, the tenth to seventeenth measurement areas MR10 to MR17 may be omitted.

[0059] As shown in Figure 4(b), in each measurement area, an illumination device LD is placed on the resin layer 10, and an image is acquired by a camera CR mounted on the illumination device LD. The shooting conditions are as follows. (Lighting device LD) Dome-shaped lighting device: HPD2-400SW manufactured by CCS Corporation Light intensity: 255 (Camera CR) Shutter speed: 1 / 1000 second F-number: 3.5 ISO:200 Resolution: 25.4 dpi (1px = 1 mm) White balance: Adjusted with a gray card with 18% reflectivity. Camera position: The camera is positioned to look into the inside of the LD (illumination device) from the top edge (height 205 mm).

[0060] The shooting conditions may also be as follows: (Lighting device LD) Dome-shaped lighting device: HPD2-400SW manufactured by CCS Corporation Light intensity: 255 (Camera CR) Shutter speed: 1 / 30 second F-number: 18 ISO:200 Resolution: 254dpi (10px = 1mm) White balance: Adjusted with a gray card with 18% reflectivity. Camera position: Looking into the LD (lamplight) from the top edge (height 205 mm) of the LD. Take a picture in this manner

[0061] The minimum brightness value of the pattern is determined from the brightness values ​​of the protrusions 60 in 17 images obtained by photographing the first to 17th measurement areas MR1 ​​to MR17 of the resin layer 10 under the above shooting conditions. First, each measurement area is photographed under the above shooting conditions to obtain the image corresponding to each measurement area and convert it to grayscale. The image contains both recesses 50 and protrusions 60, but the pattern of the recesses 50 is darkened by shadow, causing the pattern to appear smaller than its original brightness value. Therefore, pixels containing the protrusions 60 are extracted from each image, and a histogram of the brightness values ​​of the protrusions 60 is obtained as shown in Figure 5(a). Note that the pixels to be extracted may also contain recesses 50. Next, the minimum brightness value of the protrusions 60 in each image is determined from the histogram of the brightness values ​​of the protrusions 60 corresponding to each image. The smallest of the minimum brightness values ​​of the protrusions 60 in each image is taken as the minimum brightness value of the pattern.

[0062] The minimum luminance value of the shadows of the uneven surface 10b is determined from the luminance values ​​of 17 images obtained by photographing the 1st to 17th measurement areas MR1 ​​to MR17 under the above shooting conditions, with paint applied to the resin layer 10 to reduce the influence of the pattern. First, paint is applied to the resin layer 10 so as to be uniform in color. At this time, the paint used is a Munsell lightness achromatic matte paint corresponding to the luminance value with the most pixels in the histogram of the luminance values ​​of the raised parts 60 corresponding to each image obtained when determining the luminance value of the pattern above. At this time, the number of pixels in the 17 histograms for each luminance value is summed, and the luminance value with the largest sum of pixels is defined as the "luminance value with the most pixels". Next, each measurement area of ​​the painted resin layer 10 is photographed under the above shooting conditions to obtain images corresponding to each measurement area. Next, a luminance value histogram as shown in Figure 5(b) is obtained for each image. Next, the minimum luminance value in each image is determined from the luminance value histogram corresponding to each image. The smallest value among the minimum luminance values ​​in each image is taken as the minimum luminance value of the shadows of the uneven surface 10b. Alternatively, as another method for identifying the luminance value of the shaded areas of the uneven surface 10b, for example, the same location as the image can be measured using a three-dimensional measuring machine (e.g., KEYENCE VL-500) to obtain shape information of the floor. Of this, the recessed areas below half the height difference of the uneven surface, or recessed areas equal to or below half the height difference of the uneven surface, can be defined as shaded areas, and the minimum luminance value of these "shaded areas" can be taken as the minimum luminance value of the shadows.

[0063] The luminance value of the shading of the uneven surface 10b may be the luminance value of the shading of the region including the recess 50 and the convex portion 60, or it may be the luminance value of the shading of the region including the recess 50 but not the convex portion. The luminance value of the shading of the region including the recess 50 and the convex portion 60 can be determined, for example, from an image of the region including the recess 50 and the convex portion 60. The luminance value of the shading of the region including the recess 50 but not the convex portion can be determined, for example, by creating an image by cutting out only the recess 50 (i.e., the region including the recess 50 but not the convex portion 60) from an image of the region including the recess 50 and the convex portion 60, and then determining the luminance value from this image.

[0064] As shown in Figures 5(a) and 5(b), the minimum luminance value of the shadow of the uneven surface 10b is greater than or equal to the minimum luminance value of the pattern. In other words, the resin layer 10 is provided with uneven surfaces 10b and a pattern such that the minimum luminance value of the shadow of the uneven surface 10b is greater than or equal to the minimum luminance value of the pattern. Preferably, the minimum luminance value of the shadow of the uneven surface 10b is greater than the minimum luminance value of the pattern.

[0065] In a resin layer 10 having a surface 10a with irregularities 10b and a pattern layer 12 above or below the recesses 50 and protrusions 60, by making the minimum luminance value of the shadows of the irregularities 10b in a top view equal to or greater than the minimum luminance value of the pattern in a top view, the part of the pattern with the minimum luminance value (i.e., the darkest part of the pattern) can be made darker than the part of the shadows of the irregularities 10b with the minimum luminance value (i.e., the darkest part of the shadows of the irregularities 10b). In other words, the darkness of the pattern can make the darkness of the shadows of the irregularities 10b less noticeable. This allows for improved design while maintaining drainage properties provided by the irregularities 10b, making them less visible to the user. In short, it is possible to achieve both drainage and design in a bathroom floor 100.

[0066] Figures 6(a) and 6(b) are a plan view and a histogram showing the distribution of luminance values ​​in this resin layer, respectively, representing an example of a resin layer according to the embodiment. Figures 7(a) and 7(b) are a plan view and a histogram showing the distribution of luminance values ​​in a resin layer, respectively, representing an example of a resin layer related to the reference example. Figure 6(b) shows a histogram of the brightness values ​​in the region of the convex portion 60 from 17 images obtained by photographing the resin layer 10 shown in Figure 6(a) using the method described above. Figure 7(b) shows a histogram of the brightness values ​​in the region of the convex portion 60 from 17 images obtained by photographing the resin layer 10X shown in Figure 7(a) using the method described above. In the histograms in Figures 6(b) and 7(b), the horizontal axis represents the luminance value divided into 256 equal parts from 0 to 255 relative luminance, and the vertical axis represents the number of pixels. "Relative luminance" is the relative value of the luminance value in a digital image, where "0" represents pure black (R:0, G:0, B:0) and "255" represents pure white (R:255, G:255, B:255).

[0067] In the histograms of Figures 6(b) and 7(b), the region with relative luminance between 0 and 25 is defined as the first region R1, the region with relative luminance between 26 and 230 is defined as the second region R2, and the region with relative luminance between 231 and 255 is defined as the third region R3. The first region R1 is a region closer to black (i.e., with low relative luminance). The third region R3 is a region closer to white (i.e., with high relative luminance). The second region R2 is a region of intermediate colors (i.e., with medium relative luminance).

[0068] In the example in Figure 6(b), the number of pixels in the second region R2 is approximately 97% of the total number of pixels (i.e., the sum of the number of pixels in the first region R1, the second region R2, and the third region R3). In the example in Figure 7(b), the number of pixels in the second region R2 is approximately 45% of the total number of pixels (i.e., the sum of the number of pixels in the first region R1, the second region R2, and the third region R3). Preferably, the number of pixels in the second region R2 exceeds 50% of the total number of pixels.

[0069] Because the shadows created by the uneven surface 10b have a gradient, the histogram of the brightness values ​​of the shadows of the uneven surface 10b tends to have a high proportion of intermediate colors. By adopting a pattern with a high proportion of intermediate colors, such that the number of pixels in the second intermediate color region R2 exceeds 50% of the total number of pixels, the characteristics of the pattern's shading can be made to resemble the characteristics of the shading of the uneven surface 10b. This makes the shadows of the uneven surface 10b appear as a pattern, making the uneven surface 10b less noticeable.

[0070] Furthermore, the standard deviation SD1 is calculated from the brightness values ​​of the pixels in the convex portion 60 region of the image corresponding to each measurement region. As the primary standard deviation SD1, 17 standard deviations are obtained corresponding to the 1st to 17th measurement regions MR1 ​​to MR17. When the standard deviations of these 17 primary standard deviations SD1 are taken as the secondary standard deviation SD2, it is preferable that the standard deviation SD2 is 1 or less.

[0071] To obtain sufficient drainage, it is preferable to form the uneven surface 10b evenly across the entire surface of the resin layer 10. By making the standard deviation of the luminance values ​​corresponding to the 17 shooting areas (first-order standard deviation SD1) and the standard deviation of the luminance values ​​(second-order standard deviation SD2) 1 or less, the density of the pattern can be made more uniform across the entire surface of the resin layer 10. As a result, a pattern with suppressed density bias can be superimposed on the uneven surface 10b that is formed evenly across the entire surface of the resin layer 10, making the uneven surface 10b less noticeable across the entire surface of the resin layer 10 while still providing drainage due to the uneven surface 10b.

[0072] Figures 8(a) to 8(c) are plan views showing an example of a resin layer according to the embodiment. As shown in Figures 8(a) to 8(c), the resin layer 10 preferably further has lines 18 that divide the pattern. The lines 18 are, for example, patterns drawn with different luminance values ​​or colors than the pattern, and it is preferable that they be drawn with low luminance values ​​when the pattern is bright and with bright luminance values ​​when the pattern is dark. The lines 18 may consist only of straight lines, only of curves, or may include both straight lines and curves.

[0073] In the example shown in Figure 8(a), a first straight line 18a extending in the front-to-back direction and a second straight line 18b extending in the left-to-right direction are arranged perpendicularly to each other in a cross shape. In the example shown in Figure 8(b), the second straight line 18b extending in the left-to-right direction is positioned so as to intersect the first straight line 18a extending in the front-to-back direction at a right angle. In the example shown in Figure 8(c), the first straight line 18a extending in the front-to-back direction is positioned so as to intersect the curve 18c extending in the left-to-right direction. Note that the front-to-back and left-to-right directions may be reversed. Furthermore, it is preferable that the lines 18 are arranged to form a geometric pattern.

[0074] By providing lines 18 that divide the pattern in the resin layer 10, drainage is maintained through the uneven surface 10b, while creating the appearance of real tiles (for example, stone tiles) being laid. At the same time, the lines 18, which are more noticeable than the shadows of the uneven surface 10b, can draw the user's attention, making the uneven surface 10b less conspicuous. The lines 18 can be provided as needed and can be omitted.

[0075] The shape of the protrusions 60 of the resin layer 10 will be described below. Figures 9(a) to 9(c) are plan views showing an example of the shape of the convex portion when viewed from above. As shown in Figures 9(a) and 9(b), the shape of the protrusion 60 in a top view may include, for example, a curve. The shape of the protrusion 60 in a top view may consist only of a curve, as shown in Figure 9(a), or only a part of it may be a curve, as shown in Figure 9(b). Also, as shown in Figure 9(c), the shape of the protrusion 60 in a top view may include, for example, a straight line. In the example of Figure 9(c), the shape of the protrusion 60 in a top view consists only of a straight line. It is preferable that at least one of the shapes of the protrusion 60 in a top view includes a curve.

[0076] The shape of at least one of the protrusions 60 in a top view includes a curve, which allows the appearance of the protrusions 10b to match a natural texture pattern with fewer straight lines, while still providing drainage through the protrusions 10b, thereby making the protrusions 10b less noticeable.

[0077] Furthermore, the shape of the protrusions 60 when viewed from above is preferably irregular. In other words, it is preferable that the protrusions 60 are not a series of protrusions 60 having a specific shape. It is preferable that adjacent protrusions 60 have different shapes, or even if they have the same shape, their orientation and size differ. In other words, it is preferable that the protrusions 60 do not give the user the impression of a geometric shape or arrangement. This has the characteristic that when the image of the relief and shading is subjected to a two-dimensional Fourier transform, there is no bias in any particular frequency.

[0078] The shadows cast by the uneven surfaces 10b are determined by their shape; therefore, if the shape of the uneven surfaces 10b is regular, the shadows cast by the uneven surfaces 10b will also be regular. On the other hand, natural textures such as wood grain and stone patterns, which are popular as patterns for bathroom floors 100, are irregular. Therefore, when the uneven surfaces 10b, which have a regular shape, are superimposed on a natural texture pattern, the shadows cast by the uneven surfaces 10b become noticeable. In response to this, by making the shape of the protrusions 60 as seen from above irregular, the shadows cast by the uneven surfaces 10b can be made irregular. This allows for drainage by the uneven surfaces 10b, while making the uneven surfaces 10b less noticeable when superimposed on a natural texture pattern.

[0079] Figures 10(a) and 10(b) are plan views showing an example of the shape of the convex portion when viewed from above. In the examples shown in Figures 10(a) and 10(b), the entire outer circumference of the protrusion 60 is surrounded by the recess 50.

[0080] In the example shown in Figure 10(a), protrusions 60b to 60e are provided around protrusion 60a. That is, protrusion 60a is surrounded by protrusions 60b to 60e. Protrusion 60a is adjacent to each of protrusions 60b to 60e. The top view shapes of protrusions 60a to 60e each include a curve. The top view shape of protrusion 60a is different from the top view shapes of protrusions 60b to 60e.

[0081] In the example shown in Figure 10(b), protrusions 60b to 60g are provided around protrusion 60a. That is, protrusion 60a is surrounded by protrusions 60b to 60g. Protrusion 60a is adjacent to each of protrusions 60b to 60g. The top view shapes of protrusions 60a to 60g each consist of straight lines. The top view shape of protrusion 60a is different from the top view shapes of protrusions 60b to 60g.

[0082] Thus, for any convex portion 66 (convex portion 60a) and an adjacent convex portion 67 (convex portion 60b) adjacent to any convex portion 66, the shape of the adjacent convex portion 67 in a top view is different from, for example, the shape of the arbitrary convex portion 66 in a top view. In other words, the shape of the adjacent convex portion 67 in a top view is neither congruent nor similar to, for example, the shape of the arbitrary convex portion 66 in a top view.

[0083] By making the shape of adjacent protrusions 66 in a top view different from the shape of any other protrusion 66 in a top view, the shading of the unevenness 10b can be made irregular. This allows for drainage through the unevenness 10b, while making the unevenness 10b less noticeable when superimposed on a natural texture pattern.

[0084] Figures 11(a) and 11(b) are plan views showing an example of the shape of the convex portion when viewed from above. In the examples shown in Figures 11(a) and 11(b), the entire outer circumference of the protrusion 60 is surrounded by the recess 50.

[0085] In the example shown in Figure 11(a), protrusions 60b to 60g are provided around protrusion 60a. That is, protrusion 60a is surrounded by protrusions 60b to 60g. Protrusion 60a is adjacent to each of protrusions 60b to 60g. The top view shapes of protrusions 60a to 60g each include a curve. The top view shapes of protrusions 60b to 60g are, each, a rotation of the top view shape of protrusion 60a around the vertical axis, or a mirror image. The top view sizes of protrusions 60b to 60g are the same as the top view size of protrusion 60a.

[0086] The size of the protrusion 60 in a top view will be described later. In this specification, "same size" means that the size of one is within ±10% of the size of the other. In other words, in this specification, "different size" means that the size of one exceeds ±10% of the size of the other.

[0087] In the example shown in Figure 11(b), protrusions 60b to 60h are provided around protrusion 60a. That is, protrusion 60a is surrounded by protrusions 60b to 60h. Protrusion 60a is adjacent to each of protrusions 60b to 60h. The top view shapes of protrusions 60a to 60h each consist of straight lines. The top view shapes of protrusions 60b to 60h are either rotated or mirror images of the top view shape of protrusion 60a around the vertical axis. The top view sizes of protrusions 60b to 60h are the same as the top view size of protrusion 60a.

[0088] Thus, for any convex portion 66 (convex portion 60a) and an adjacent convex portion 67 (convex portion 60b) adjacent to any convex portion 66, the shape of the adjacent convex portion 67 in a top view is, for example, the result of rotating the shape of the arbitrary convex portion 66 in a top view around the vertical axis, or it is a mirror image of the shape of the arbitrary convex portion 66 in a top view. The size of the adjacent convex portion 67 in a top view is, for example, the same as the size of the arbitrary convex portion 66 in a top view. In other words, the shape of the adjacent convex portion 67 in a top view is, for example, congruent to the shape of the arbitrary convex portion 66 in a top view, and is either rotated around the vertical axis or is a mirror image.

[0089] By making the shape of the adjacent protrusion 67 in a top view the same as the shape of any protrusion 66 in a top view rotated around the vertical axis, or a mirror image of the shape of any protrusion 66 in a top view, and by making the size of the adjacent protrusion 67 in a top view the same as the size of any protrusion 66 in a top view, the shading of the unevenness 10b can be made irregular. This allows for drainage properties provided by the unevenness 10b, while making the unevenness 10b less noticeable when superimposed on a natural texture pattern.

[0090] Furthermore, the shape of one of the convex portions 60 adjacent to any convex portion 66, other than the adjacent convex portion 67, in a top view may be the same as or different from the shape of the convex portion 66 in a top view. Also, the size of one of the convex portions 60 adjacent to any convex portion 66, other than the adjacent convex portion 67, in a top view may be the same as or different from the size of the convex portion 66 in a top view.

[0091] Figures 12(a) and 12(b) are plan views showing an example of the shape of the convex portion when viewed from above. In the examples shown in Figures 12(a) and 12(b), the entire outer circumference of the protrusion 60 is surrounded by the recess 50.

[0092] In the example shown in Figure 12(a), protrusions 60b to 60j are provided around protrusion 60a. That is, protrusion 60a is surrounded by protrusions 60b to 60j. Protrusion 60a is adjacent to each of protrusions 60b to 60j. The top view shapes of protrusions 60a to 60j each include curves. The top view shapes of protrusions 60b to 60j are the same as the top view shapes of protrusion 60a. The top view sizes of protrusions 60b to 60d are each smaller than the top view size of protrusion 60a. The top view sizes of protrusions 60e to 60j are the same as the top view size of protrusion 60a.

[0093] In the example shown in Figure 12(b), protrusions 60b to 60e are provided around protrusion 60a. That is, protrusion 60a is surrounded by protrusions 60b to 60e. Protrusion 60a is adjacent to each of protrusions 60b to 60e. The top view shape of protrusions 60a to 60e consists of straight lines. The top view shape of protrusions 60b to 60e is the same as the top view shape of protrusion 60a. The top view size of protrusions 60b to 60e is larger than the top view size of protrusion 60a.

[0094] Thus, for any convex portion 66 (convex portion 60a) and an adjacent convex portion 67 (convex portion 60b) adjacent to any convex portion 66, the shape of the adjacent convex portion 67 in a top view is, for example, the same as the shape of the arbitrary convex portion 66 in a top view. The size of the adjacent convex portion 67 in a top view is different from the size of the arbitrary convex portion 66 in a top view. In other words, the shape of the adjacent convex portion 67 in a top view is similar to the shape of the arbitrary convex portion 66 in a top view.

[0095] By making the shape of adjacent protrusions 67 in a top view the same as the shape of any protrusion 66 in a top view, and by making the size of adjacent protrusions 67 in a top view different from the size of any protrusion 66 in a top view, the shading of the unevenness 10b can be made irregular. This allows for drainage properties provided by the unevenness 10b, while making the unevenness 10b less noticeable when superimposed on a natural texture pattern.

[0096] Furthermore, the shape of one of the convex portions 60 adjacent to any convex portion 66, other than the adjacent convex portion 67, in a top view may be the same as or different from the shape of the convex portion 66 in a top view. Also, the size of one of the convex portions 60 adjacent to any convex portion 66, other than the adjacent convex portion 67, in a top view may be the same as or different from the size of the convex portion 66 in a top view.

[0097] Figures 13(a) and 13(b) are plan views showing an example of the shape of the convex portion in a top view. In the examples shown in Figures 13(a) and 13(b), the entire outer circumference of the protrusion 60 is surrounded by the recess 50.

[0098] In the example shown in Figure 13(a), protrusions 60b to 60e are provided around protrusion 60a. That is, protrusion 60a is surrounded by protrusions 60b to 60e. Protrusion 60a is adjacent to each of protrusions 60b to 60e. The top view shapes of protrusions 60a to 60e each include a curve. The top view shapes of protrusions 60b to 60e are either rotated or mirror images of the top view shape of protrusion 60a around the vertical axis. The top view sizes of protrusions 60b to 60e are each larger than the top view size of protrusion 60a.

[0099] In the example shown in Figure 13(b), protrusions 60b to 60e are provided around protrusion 60a. That is, protrusion 60a is surrounded by protrusions 60b to 60e. Protrusion 60a is adjacent to each of protrusions 60b to 60e. The top view shapes of protrusions 60a to 60e each consist of straight lines. The top view shapes of protrusions 60b to 60e are either rotated or mirror images of the top view shape of protrusion 60a around the vertical axis. The top view sizes of protrusions 60b to 60e are each larger than the top view size of protrusion 60a.

[0100] Thus, for any convex portion 66 (convex portion 60a) and an adjacent convex portion 67 (convex portion 60b) adjacent to any convex portion 66, the shape of the adjacent convex portion 67 in a top view is, for example, the result of rotating the shape of the arbitrary convex portion 66 in a top view around the vertical axis, or a mirror image of the shape of the arbitrary convex portion 66 in a top view. The size of the adjacent convex portion 67 in a top view is, for example, different from the size of the arbitrary convex portion 66 in a top view. In other words, the shape of the adjacent convex portion 67 in a top view is, for example, similar to the shape of the arbitrary convex portion 66 in a top view, and is either rotated around the vertical axis or a mirror image.

[0101] By making the size of adjacent protrusions 67 in a top view different from the size of any protrusion 66 in a top view, and further by making the shape of adjacent protrusions 67 in a top view the same as the shape of any protrusion 66 in a top view rotated around the vertical axis, or a mirror image of the shape of any protrusion 66 in a top view, the shading of the unevenness 10b can be made more irregular. This allows for drainage properties provided by the unevenness 10b, while making the unevenness 10b less noticeable when superimposed on a natural texture pattern.

[0102] Furthermore, the shape of one of the convex portions 60 adjacent to any convex portion 66, other than the adjacent convex portion 67, in a top view may be the same as or different from the shape of the convex portion 66 in a top view. Also, the size of one of the convex portions 60 adjacent to any convex portion 66, other than the adjacent convex portion 67, in a top view may be the same as or different from the size of the convex portion 66 in a top view.

[0103] Figures 14(a) to 14(c) are plan views showing an example of the shape of the convex portion when viewed from above. In the examples of Figures 14(a) and 14(b), the protrusions 60 are arranged in a line in the front-to-back direction. In the example of Figure 14(c), the protrusions 60 are arranged in a concentric circle around the drain opening 100h. In the examples of Figures 14(a) to 14(c), a portion of the outer perimeter of the protrusions 60 is surrounded by the recesses 50, and the remaining portion of the outer perimeter of the protrusions 60 is surrounded by at least one of the bathroom walls (wall panels 300d to 300f), the drain opening 100h, the bathtub 200, and the bathroom door.

[0104] In the example shown in Figure 14(a), the protrusion 60a is located between the protrusions 60b and 60c. That is, the protrusion 60a is surrounded by the protrusions 60b and 60c. The protrusion 60a is adjacent to each of the protrusions 60b and 60c. The top view shapes of the protrusions 60a to 60c each include a straight line and a curve. The top view shape of the protrusion 60a is different from the top view shapes of the protrusions 60b and 60c. The top view sizes of the protrusions 60b and 60c are the same as the top view size of the protrusion 60a.

[0105] In the example shown in Figure 14(b), the protrusion 60a is located between the protrusions 60b and 60c. That is, the protrusion 60a is surrounded by the protrusions 60b and 60c. The protrusion 60a is adjacent to each of the protrusions 60b and 60c. The top view shapes of the protrusions 60a to 60c are all curved. The top view shape of the protrusion 60a is different from the top view shapes of the protrusions 60b and 60c. The top view sizes of the protrusions 60b and 60c are different from the top view size of the protrusion 60a.

[0106] In the example shown in Figure 14(c), the protrusion 60a is located between the protrusions 60b and 60c. In other words, the protrusion 60a is surrounded by the protrusions 60b and 60c. The protrusion 60a is adjacent to each of the protrusions 60b and 60c. The top view shapes of the protrusions 60a to 60c are all curved. The top view shape of the protrusion 60a is different from the top view shapes of the protrusions 60b and 60c. The top view sizes of the protrusions 60b and 60c are the same as the top view size of the protrusion 60a.

[0107] Thus, for any convex portion 66 (convex portion 60a) and an adjacent convex portion 67 (convex portion 60b) adjacent to any convex portion 66, the shape of the adjacent convex portion 67 in a top view is different from, for example, the shape of the arbitrary convex portion 66 in a top view. In other words, the shape of the adjacent convex portion 67 in a top view is neither congruent nor similar to, for example, the shape of the arbitrary convex portion 66 in a top view.

[0108] By making the shape of one of the protrusions 60 in a top view different from the shapes of all the adjacent protrusions 60 in a top view, the shading of the unevenness 10b can be made irregular. This allows for drainage through the unevenness 10b, while making the unevenness 10b less noticeable when superimposed on a natural texture pattern.

[0109] Figure 15 is a plan view showing an example of the shape of the convex portion in a top view. In the example shown in Figure 15, the protrusions 60 are arranged in the front-to-back and left-to-right directions. In the example shown in Figure 15, a portion of the outer perimeter of the protrusions 60 is surrounded by the recesses 50, and the remaining portion of the outer perimeter of the protrusions 60 is surrounded by at least one of the bathroom walls (wall panels 300d-300f), the drain 100h, the bathtub 200, and the bathroom door.

[0110] In the example shown in Figure 15, protrusions 60b to 60d are provided around protrusion 60a. That is, protrusion 60a is surrounded by protrusions 60b to 60d. Protrusion 60a is adjacent to each of protrusions 60b to 60d. The top view shapes of protrusions 60a to 60d each consist of straight lines. The top view shape of protrusion 60b is obtained by rotating the top view shape of protrusion 60a around the vertical axis. The top view size of protrusion 60b is the same as the top view size of protrusion 60a.

[0111] Thus, for any convex portion 66 (convex portion 60a) and an adjacent convex portion 67 (convex portion 60b) adjacent to any convex portion 66, the shape of the adjacent convex portion 67 in a top view is, for example, the result of rotating the shape of the arbitrary convex portion 66 in a top view around the vertical axis, or it is a mirror image of the shape of the arbitrary convex portion 66 in a top view. The size of the adjacent convex portion 67 in a top view is, for example, the same as the size of the arbitrary convex portion 66 in a top view. In other words, the shape of the adjacent convex portion 67 in a top view is, for example, congruent to the shape of the arbitrary convex portion 66 in a top view, and is either rotated around the vertical axis or is a mirror image.

[0112] By making the shape of adjacent protrusions 67 in a top view the same as the shape of any protrusion 66 in a top view rotated around the vertical axis, or a mirror image of the shape of any protrusion 66 in a top view, and by making the size of adjacent protrusions 67 in a top view the same as the size of any protrusion 66 in a top view, the shape of the bumps 10b can be made irregular. This allows for drainage properties provided by the bumps 10b, while making the bumps 10b less noticeable when superimposed on a natural texture pattern.

[0113] Figures 16(a) and 16(b) are plan views showing an example of the shape of the convex portion when viewed from above. In the example shown in Figure 16(a), the protrusions 60 are arranged side by side in the front-to-back and left-to-right directions. In the example shown in Figure 16(b), the protrusions 60 are also arranged side by side in the front-to-back and left-to-right directions. In the examples shown in Figures 16(a) and 16(b), a portion of the outer perimeter of the protrusions 60 is surrounded by the recesses 50, and the remaining portion of the outer perimeter of the protrusions 60 is surrounded by at least one of the bathroom walls (wall panels 300d to 300f), the drain 100h, the bathtub 200, and the bathroom door.

[0114] In the example shown in Figure 16(a), protrusions 60b to 60d are provided around protrusion 60a. That is, protrusion 60a is surrounded by protrusions 60b to 60d. Protrusion 60a is adjacent to each of protrusions 60b to 60d. The top view shape of protrusions 60a to 60d consists of straight lines. The top view shape of protrusions 60b to 60d is the same as the top view shape of protrusion 60a. The top view size of protrusions 60b to 60d is smaller than the top view size of protrusion 60a.

[0115] In the example shown in Figure 16(b), protrusions 60b to 60e are provided around protrusion 60a. That is, protrusion 60a is surrounded by protrusions 60b to 60e. Protrusion 60a is adjacent to each of protrusions 60b to 60e. The top view shapes of protrusions 60a to 60e each consist of straight lines. The top view shape of protrusion 60b is obtained by rotating the top view shape of protrusion 60a around the vertical axis. The size of protrusion 60b in the top view is smaller than the size of protrusion 60a in the top view.

[0116] Thus, for any convex portion 66 (convex portion 60a) and an adjacent convex portion 67 (convex portion 60b) adjacent to any convex portion 66, the shape of the adjacent convex portion 67 in a top view is, for example, the same as the shape of the arbitrary convex portion 66 in a top view. The size of the adjacent convex portion 67 in a top view is different from the size of the arbitrary convex portion 66 in a top view. In other words, the shape of the adjacent convex portion 67 in a top view is similar to the shape of the arbitrary convex portion 66 in a top view. Furthermore, the shape of the adjacent convex portion 67 in a top view is similar to the shape of the arbitrary convex portion 66 in a top view, and is either rotated around the vertical axis or is a mirror image.

[0117] By making the shape of adjacent protrusions 67 in a top view the same as the shape of any protrusion 66 in a top view, and by making the size of adjacent protrusions 67 in a top view different from the size of any protrusion 66 in a top view, the shading of the unevenness 10b can be made irregular. This allows for drainage properties provided by the unevenness 10b, while making the unevenness 10b less noticeable when superimposed on a natural texture pattern.

[0118] Furthermore, by making the size of adjacent protrusions 67 in a top view different from the size of any protrusion 66 in a top view, and by making the shape of adjacent protrusions 67 in a top view the same as the shape of any protrusion 66 in a top view rotated around the vertical axis, or a mirror image of the shape of any protrusion 66 in a top view, the shading of the unevenness 10b can be made more irregular. This allows for drainage properties provided by the unevenness 10b, while making the unevenness 10b less noticeable when superimposed on a natural texture pattern.

[0119] Figures 17(a) to 17(g) are explanatory diagrams showing the size of the protrusions. The protrusion 60 has at least one of a first protrusion 81, a second protrusion 82, and a third protrusion 83. For example, the protrusion 60 has a first protrusion 81 and a second protrusion 82. For example, the protrusion 60 has a second protrusion 82 and a third protrusion 83.

[0120] Figure 17(a) shows the first protrusion 81. The first protrusion 81 is a protrusion 60 whose entire outer circumference is surrounded by the recess 50.

[0121] As shown in Figure 17(a), the first concave-concave size, which indicates the size of the first protrusion 81, is represented by the length L1 of the short side of a virtual rectangle IR that is circumscribing the first protrusion 81, with the longest side being the maximum length of the first protrusion 81 in a top view.

[0122] Figures 17(b) to 17(d) show the second protrusion 82. The second protrusion 82 is a protrusion 60 in which a part of the outer circumference is a single recess 50 and the rest of the outer circumference is surrounded by at least one of the bathroom wall (wall panel 300d to 300f), drain 100h, bathtub 200, and bathroom door.

[0123] As shown in Figures 17(b) to 17(d), the second concave-concave size, which indicates the size of the second protrusion 82, is represented by the length L2 of the short side of a virtual rectangle IR that is circumscribing the second protrusion 82, with the longest side being the maximum length of the second protrusion 82 in a top view.

[0124] Figures 17(e) to 17(g) show the third protrusion 83. The third protrusion 83 is a protrusion 60 in which a part of the outer circumference is surrounded by a plurality of recesses 50, and the rest of the outer circumference is surrounded by at least one of the bathroom wall (wall panels 300d to 300f), drain 100h, bathtub 200, and bathroom door.

[0125] As shown in Figures 17(e) to 17(g), the third concave-convex size, which indicates the size of the third protrusion 83, is represented by the length L3, which is the minimum distance between the two concave 50 that surround the third protrusion 83 and face each other in a top view.

[0126] Figure 18 is a plan view showing a bathroom floor according to a modified example of the embodiment. Figures 19(a) and 19(b) are a plan view and a cross-sectional view, respectively, showing a part of the bathroom floor according to a modified example of the embodiment. Figure 19(a) is an enlarged view of region E shown in Figure 18. Figure 19(b) is a cross-sectional view taken along the line F1-F2 shown in Figure 19(a). As shown in Figures 18, 19(a), and 19(b), the surface 10a of the resin layer 10 of the modified bathroom floor 100A according to the embodiment is provided with linear grooves 15 that are different from the recesses 50. The rest of the structure is the same as that of the bathroom floor 100 described above, so a description is omitted.

[0127] The groove 15 is recessed downwards and is provided to divide the surface 10a of the resin layer 10 into multiple surface regions 16. When viewed from above, the groove 15 may extend in a straight line, or in a curved line, or it may include both a straight-line portion and a curved-line portion. In this example, a second groove 15b extending in a straight line in the left-right direction is positioned to abut perpendicularly against a first groove 15a extending in a straight line in the front-back direction. One region enclosed by the groove 15 is a surface region 16.

[0128] Each of the multiple surface regions 16 comprises a first surface region 16a and a second surface region 16b adjacent to the first surface region 16a in a top view. Preferably, the shape of the second surface region 16b in a top view is congruent or similar to the shape of the first surface region 16a in a top view. In this example, the shape of the second surface region 16b in a top view is congruent to the shape of the first surface region 16a in a top view.

[0129] By making the shape of the second surface region 16b in a top view congruent to or similar to the shape of the first surface region 16a in a top view, the grooves 15 can be arranged regularly. This allows for drainage through the uneven surface 10b, while drawing the user's attention to the regularly arranged grooves 15 rather than the irregularly arranged recesses 50, making the uneven surface 10b less noticeable. The grooves 15 can be provided as needed and are optional.

[0130] Figures 20(a) and 20(b) are schematic cross-sectional views showing the cross-sectional shape of the resin layer according to a modified embodiment. As shown in Figures 20(a) and 20(b), the vertical length D2 between the top 61 located at the upper end of the uneven surface 10b and the groove bottom 15c located at the lower end of the groove 15 is different from, for example, the vertical length D1 between the top 61 located at the upper end of the uneven surface 10b and the bottom 51 located at the lower end of the uneven surface 10b. Length D2 may be greater than length D1, as shown in Figure 20(a), or less than length D1, as shown in Figure 20(b).

[0131] Length D1 is, for example, 0.5 mm or more and 2.0 mm or less. Length D2 is, for example, 0.5 mm or more and 2.0 mm or less. It is preferable that lengths D1 and D2 are substantially constant across the entire surface of the resin layer 10. If lengths D1 and D2 differ depending on the position, the length D2 in a groove 15 at any position is compared with the length D1 in an adjacent uneven surface 10b to this groove 15. In this case, for example, the vertical length between the groove bottom 15c at any position and the top 61 closest to the groove bottom 15c is considered to be length D2, and the vertical length between this top 61 and the bottom 51 closest to this top 61 is considered to be length D1.

[0132] By making the length D2 greater than the length D1, the shadow of the groove 15 can be made darker than the shadow of the uneven surface 10b. This makes it appear as if real tiles (for example, stone tiles) are laid out, while drawing the user's attention to the shadow of the groove 15, which is more prominent than the shadow of the uneven surface 10b, making the uneven surface 10b less noticeable. Furthermore, the groove 15 can also be given a drainage function, further improving drainage.

[0133] On the other hand, by making the length D2 smaller than the length D1, the cleanability of the groove 15 can be improved. Furthermore, since drainage is ensured by the irregularities 10b, sufficient drainage can be obtained even if the groove 15 does not have a drainage function.

[0134] The embodiment may include the following configurations.

[0135] (Composition 1) A bathroom floor comprising a resin layer having a patterned layer, The resin layer has irregularities on its surface. The aforementioned irregularities include recesses and protrusions whose outer periphery, when viewed from above, is surrounded by at least one of the recesses, the bathroom wall, the drain, the bathtub, and the bathroom door. The handle layer has a handle and is positioned above or below the recess and the protrusion. A bathroom floor characterized in that the minimum luminance value of the shadows of the uneven surface in a top view is greater than or equal to the minimum luminance value of the pattern in a top view.

[0136] (Configuration 2) When N images are obtained by photographing N 200mm square shooting areas (where N is an integer of 9 or more) arranged so as not to overlap when viewed from above the resin layer, with a resolution of 1mm per pixel, and converting these N images to grayscale, and when the brightness values ​​of the pixels in the convex region of the grayscale converted images are divided into 256 equal parts with relative brightness values ​​from 0 to 255, the region with a relative brightness of 0 to 25 is designated as the first region, the region with a relative brightness of 26 to 230 is designated as the second region, and the region with a relative brightness of 231 to 255 is designated as the third region, the number of pixels in the second region exceeds 50% of the sum of the number of pixels in the first region, the second region, and the third region. The bathroom floor according to configuration 1, characterized in that when the standard deviation calculated from the brightness values ​​of the pixels in the convex region of each of the N images is taken as the first standard deviation, and the standard deviation of the N first standard deviations is taken as the second standard deviation, the second standard deviation is 1 or less.

[0137] (Composition 3) The aforementioned irregularities include a plurality of protrusions, each having an arbitrary protrusion and an adjacent protrusion adjacent to the arbitrary protrusion when viewed from above. The bathroom floor according to configuration 1 or 2, characterized in that the shape of the adjacent protrusions in a top view is different from the shape of any arbitrary protrusion in a top view.

[0138] (Composition 4) The aforementioned irregularities include a plurality of protrusions, each having an arbitrary protrusion and an adjacent protrusion adjacent to the arbitrary protrusion when viewed from above. The shape of the adjacent protrusion in a top view is obtained by rotating the shape of the arbitrary protrusion in a top view around the vertical axis, or it is a mirror image of the shape of the arbitrary protrusion in a top view. The bathroom floor according to configuration 1 or 2, characterized in that the size of the adjacent protrusions in a top view is the same as the size of any arbitrary protrusion in a top view.

[0139] (Composition 5) The aforementioned irregularities include a plurality of protrusions, each having an arbitrary protrusion and an adjacent protrusion adjacent to the arbitrary protrusion when viewed from above. The shape of the adjacent protrusions in a top view is the same as the shape of any of the protrusions in a top view. The bathroom floor according to configuration 1 or 2, characterized in that the size of the adjacent protrusions in a top view is different from the size of any arbitrary protrusion in a top view.

[0140] (Composition 6) The bathroom floor according to configuration 5, characterized in that the shape of the adjacent protrusions in a top view is obtained by rotating the shape of the arbitrary protrusion in a top view around the vertical axis, or is a mirror image of the shape of the arbitrary protrusion in a top view.

[0141] (Composition 7) The bathroom floor according to any one of configurations 3 to 6, characterized in that the shape of at least one of the protrusions in a top view includes a curve.

[0142] (Composition 8) In the aforementioned protrusion and the recess that surrounds at least a part thereof, The recess has a bottom portion located at the lowest point, and a first curved portion located between the bottom portion and the convex portion, with the center of the radius of curvature located on the recess side. The aforementioned protrusion has a vertex located at the uppermost part and a second curved part located between the vertex and the first curved part, with the center of the radius of curvature located on the side of the protrusion. The bathroom floor according to any one of configurations 1 to 7, characterized in that the radius of curvature of the second curved portion is greater than or equal to the radius of curvature of the first curved portion.

[0143] (Composition 9) The bathroom floor according to configuration 2, characterized in that the resin layer has lines that divide the pattern.

[0144] (Composition 10) A bathroom floor according to any one of configurations 1 to 9, further comprising an elastically deformable cushion layer provided beneath the resin layer.

[0145] (Composition 11) The bathroom floor according to any one of configurations 1 to 10, further comprising a coating layer provided on the resin layer and containing transparent fine particles.

[0146] As described above, according to the embodiment, a bathroom floor that can achieve both drainage and design is provided.

[0147] Embodiments of the present invention have been described above. However, the present invention is not limited to these descriptions. Modifications made by those skilled in the art to the above-described embodiments are also included within the scope of the present invention, as long as they retain the features of the present invention. For example, the shape, dimensions, material, and arrangement of each element of a bathroom floor, etc., are not limited to those exemplified and can be modified as appropriate. Furthermore, the elements of each of the embodiments described above can be combined to the extent technically possible, and these combinations are also included within the scope of the present invention insofar as they include the features of the present invention. [Explanation of Symbols]

[0148] 10, 10X Resin layer, 10a Surface, 10b Irregularities, 11 Main body, 11a Surface, 11b Irregularities, 12 Pattern layer, 12a Surface, 12b Irregularities, 15 Groove, 15a First groove, 15b Second groove, 15c Groove bottom, 16 Surface area, 16a, 16b First and second surface areas, 18 Line, 18a First straight line, 18b Second straight line, 18c Curve, 20 Cushion layer, 30 Coating layer, 31 Fine particles, 33 Hydrophilic layer, 50 Recess, 51 Bottom, 52 First curved section, 55 Inclined surface, 60, 60a~60j Convex section, 61 Top, 62 Second curved section, 66 Arbitrary protrusion, 67 adjacent protrusion, 81 first protrusion, 82 second protrusion, 83 third protrusion, 100, 100A bathroom floor, 100a surface, 100h drain, 110 support leg, 200 bathtub, 210 support leg, 220 drain piping, 230 bath apron, 240, 250 small panel, 300a~300f wall panel, 400 lighting device, 500 bathroom unit, CM center measurement area, CR camera, D1, D2 length, IR virtual rectangle, L1~L3 length, LD lighting device, MR1~MR17 1st~17th measurement area, R1~R3 ​​1st~3rd area, r1, r2 radius of curvature, RP reference plane, S installation surface

Claims

1. A bathroom floor comprising a resin layer having a patterned layer, The resin layer has irregularities on its surface. The aforementioned irregularities include recesses and protrusions whose outer periphery, when viewed from above, is surrounded by at least one of the recesses, the bathroom wall, the drain, the bathtub, and the bathroom door. The handle layer has a handle and is positioned above or below the recess and the protrusion. The minimum luminance value of the shadow of the uneven surface in a top view is greater than or equal to the minimum luminance value of the pattern in a top view. When N images are obtained by photographing N 200 mm square shooting areas (where N is an integer of 9 or more) arranged so as not to overlap when viewed from above the resin layer, with a resolution of 1 mm per pixel, and converting these N images to grayscale, and when the brightness values ​​of the pixels in the area of ​​the protrusions in the grayscale converted images are divided into 256 equal parts with relative brightness values ​​from 0 to 255, the area with a relative brightness of 0 or more and 25 or less is designated as the first area, the area with a relative brightness of 26 or more and 230 or less is designated as the second area, and the area with a relative brightness of 231 or more and 255 or less is designated as the third area, the number of pixels in the second area exceeds 50% of the sum of the number of pixels in the first area, the second area, and the third area. A bathroom floor characterized in that, when the standard deviation calculated from the brightness values ​​of the pixels in the convex region of each of the N images is defined as the first standard deviation, and the standard deviation of the N first standard deviations is defined as the second standard deviation, the second standard deviation is 1 or less.

2. The aforementioned irregularities include a plurality of protrusions, each having an arbitrary protrusion and an adjacent protrusion adjacent to the arbitrary protrusion when viewed from above. The bathroom floor according to claim 1, characterized in that the shape of the adjacent protrusions in a top view is different from the shape of any of the protrusions in a top view.

3. The aforementioned irregularities include a plurality of protrusions, each having an arbitrary protrusion and an adjacent protrusion adjacent to the arbitrary protrusion when viewed from above. The shape of the adjacent protrusion in a top view is obtained by rotating the shape of the arbitrary protrusion in a top view around the vertical axis, or it is a mirror image of the shape of the arbitrary protrusion in a top view. The bathroom floor according to claim 1, characterized in that the size of the adjacent protrusions in a top view is the same as the size of any arbitrary protrusion in a top view.

4. The aforementioned irregularities include a plurality of protrusions, each having an arbitrary protrusion and an adjacent protrusion adjacent to the arbitrary protrusion when viewed from above. The shape of the adjacent protrusions in a top view is the same as the shape of any of the protrusions in a top view. The bathroom floor according to claim 1, characterized in that the size of the adjacent protrusions in a top view is different from the size of any arbitrary protrusion in a top view.

5. The bathroom floor according to claim 4, characterized in that the shape of the adjacent protrusions in a top view is obtained by rotating the shape of the arbitrary protrusion in a top view around the vertical axis, or is a mirror image of the shape of the arbitrary protrusion in a top view.

6. The bathroom floor according to any one of claims 2 to 5, characterized in that the shape of at least one of the protrusions in a top view includes a curve.

7. In the aforementioned protrusion and the recess that surrounds at least a part thereof, The recess has a bottom portion located at the lowest point, and a first curved portion located between the bottom portion and the convex portion, with the center of the radius of curvature located on the recess side. The convex portion has a vertex located at the uppermost part and a second curved portion located between the vertex and the first curved portion, with the center of the radius of curvature located on the side of the convex portion. The bathroom floor according to any one of claims 1 to 5, characterized in that the radius of curvature of the second curved portion is greater than or equal to the radius of curvature of the first curved portion.

8. The bathroom floor according to claim 1, characterized in that the resin layer has lines that divide the pattern.

9. The bathroom floor according to any one of claims 1 to 5, further comprising an elastically deformable cushion layer provided beneath the resin layer.

10. The bathroom floor according to any one of claims 1 to 5, further comprising a coating layer provided on the resin layer and containing transparent fine particles.

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