Japanese-style room structure

Abstract

The Japanese-style room structure is placed indoors in a building without being fixed to any of the floor, walls, or ceiling. The Japanese-style room structure includes a plurality of columns, a plurality of outer connection portions that connect the lower ends of the columns to each other and extend along each side of a polygon, and a plurality of inner connection portions that are arranged inside the plurality of outer connection portions and along the outer connection portions so as to be in contact with the outer connection portions. The plurality of outer connection portions include a first outer connection portion, a second outer connection portion, a third outer connection portion, and a fourth outer connection portion. The plurality of inner connection portions include a first inner connection portion that is arranged in contact with the first outer connection portion, and a second inner connection portion that is arranged in contact with the second outer connection portion. The Japanese-style room structure further includes a plurality of joists that are positioned between the first inner connection portion and the second inner connection portion, away from the first inner connection portion and the second inner connection portion and away from each other, and that connect the third outer connection portion and the fourth outer connection portion; floorboards that are positioned on the plurality of inner connection portions and the plurality of joists so as to be supported by the plurality of inner connection portions and the plurality of joists; and a tatami mat section that is positioned on the floorboards so as to be supported by the floorboards.

Description

[Technical Field]

[0001] The present disclosure relates to a Japanese-style room structure. [Background technology]

[0002] A Japanese-style room structure is known that includes multiple pillars, multiple outer connection parts, multiple joists, floorboards, and a tatami area (see Figure 3 of Non-Patent Document 1). In the Japanese-style room structure described in Non-Patent Document 1, the outer connection parts connect the lower ends of the multiple pillars. The joists are supported by the outer connection parts. The floorboards are supported by the multiple joists. The tatami area is placed on top of the floorboards. [Prior art documents] [Patent documents]

[0003] [Non-Patent Document 1] https: / / www.uchida.co.jp / company / news / press / 210728.html Summary of the Invention [Problem to be solved by the invention]

[0004] There is a demand for a Japanese-style room structure that is placed indoors in a building that includes floors, walls, and ceilings, but that has high structural strength while being unfixed to any of the floors, walls, or ceilings.

[0005] The present disclosure provides a Japanese-style room structure that is placed indoors in a building including floors, walls, and ceilings, and has high structural strength while being placed without being fixed to any of the floors, walls, or ceilings. [Means for solving the problem]

[0006] A Japanese-style room structure according to the present disclosure is disposed indoors in a building including a floor, walls, and a ceiling, but is not fixed to any of the floor, walls, or ceiling. The Japanese-style room structure includes a plurality of columns positioned to correspond to the vertices of a polygon including a first pair of sides and a second pair of sides and extending perpendicular to the polygon; a plurality of outer connectors connecting the lower ends of the columns and extending along each side of the polygon; and a plurality of inner connectors disposed inside the outer connectors along the outer connectors and in contact with the outer connectors. The outer connectors include first and second outer connectors corresponding to the first pair of parallel sides of the polygon, and third and fourth outer connectors corresponding to the second pair of parallel sides of the polygon. The plurality of inner connection portions include a first inner connection portion that is arranged in contact with the first outer connection portion and connects the third outer connection portion and the fourth outer connection portion, and a second inner connection portion that is arranged in contact with the second outer connection portion and connects the third outer connection portion and the fourth outer connection portion. The Japanese-style room structural body further includes a plurality of joists between the first inner connection portion and the second inner connection portion, the joists being spaced apart from each other and extending parallel to the first inner connection portion and the second inner connection portion, and connecting the third outer connection portion and the fourth outer connection portion, floorboards being arranged on the plurality of inner connection portions and the plurality of joists so as to be supported by the plurality of inner connection portions and the plurality of joists, and a tatami mat being arranged on the floorboards so as to be supported by the floorboards. [Effects of the Invention]

[0007] The Japanese-style room structure of the present disclosure is placed inside a building including a floor, walls, and ceiling, and yet has high structural strength despite being placed without being fixed to any of the floor, walls, or ceiling. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a front view of a Japanese-style room structure. [Figure 2] FIG. 2 is a plan view of the Japanese-style room structure shown in FIG. [Figure 3] FIG. 3 is a bottom view of the Japanese-style room structure shown in FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along line AA in FIGS. [Figure 5] FIG. 5 is a cross-sectional view taken along line BB in FIGS. [Figure 6] FIG. 6 is a diagram illustrating the inner connection portion. [Figure 7] FIG. 7 is a cross-sectional view taken along line DD in FIG. [Figure 8] FIG. 8 is a front view of an example of use of a Japanese-style room structural body in which fittings are attached to the second lintel and second threshold. [Figure 9] FIG. 9 is a cross-sectional view of a first modified example of a Japanese-style room structural body. [Figure 10] FIG. 10 is a cross-sectional view of a second modified example of a Japanese-style room structural body. [Figure 11] FIG. 11 is a cross-sectional view of a third modified example of a Japanese-style room structural body. [Figure 12] FIG. 12 is a plan view of the Japanese-style room structural body shown in FIG. 11 with a portion cut away. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Outline of the embodiment]

[0010] [1] A Japanese-style room structure according to the present disclosure is disposed indoors in a building including a floor, walls, and a ceiling, but is not fixed to any of the floor, walls, or ceiling. The Japanese-style room structure includes a plurality of columns positioned to correspond to the vertices of a polygon including a first pair of sides and a second pair of sides and extending perpendicular to the polygon; a plurality of outer connectors connecting the lower ends of the columns to each other and extending along each side of the polygon; and a plurality of inner connectors disposed inside the outer connectors along the outer connectors and in contact with the outer connectors. The outer connectors include first and second outer connectors corresponding to the first pair of parallel sides of the polygon, and third and fourth outer connectors corresponding to the second pair of parallel sides of the polygon. The plurality of inner connection portions include a first inner connection portion that is arranged in contact with the first outer connection portion and connects the third outer connection portion and the fourth outer connection portion, and a second inner connection portion that is arranged in contact with the second outer connection portion and connects the third outer connection portion and the fourth outer connection portion. The Japanese-style room structural body further includes a plurality of joists between the first inner connection portion and the second inner connection portion, the joists being spaced apart from each other and extending parallel to the first inner connection portion and the second inner connection portion, and connecting the third outer connection portion and the fourth outer connection portion, floorboards being arranged on the plurality of inner connection portions and the plurality of joists so as to be supported by the plurality of inner connection portions and the plurality of joists, and a tatami mat being arranged on the floorboards so as to be supported by the floorboards.

[0011] The Japanese-style room structure of the present disclosure is placed inside a building including a floor, walls, and a ceiling, and is not fixed to any of the floor, the walls, or the ceiling. The Japanese-style room structure has a plurality of outer connections and a plurality of inner connections, and therefore has high structural strength.

[0012] [2] The Japanese-style room structure may further include a plurality of lintels connecting the upper ends of the plurality of pillars, including a first lintel to a fourth lintel corresponding to the first outer connection portion to the fourth outer connection portion, respectively, and a plurality of thresholds arranged on the upper surfaces of the plurality of outer connection portions, including a first threshold to a fourth threshold located away from the first outer connection portion to the lower side of the fourth outer connection portion.

[0013] The Japanese-style room structure further includes a plurality of lintels connecting the upper ends of the plurality of pillars, so that the structural strength of the upper part is high. The Japanese-style room structure further includes a threshold, so that fittings can be placed between the lintels and the threshold.

[0014] [3] In the Japanese-style room structure, the lower surface of each of the plurality of lintels may have a groove, and the upper surface of each of the plurality of thresholds may have a groove. In the Japanese-style room structure, a fixture can be placed between at least one of the plurality of lintels and the plurality of thresholds.

[0015] [4] In the Japanese-style room structure, the lower surface of the first lintel may be flat, and the lower surfaces of the second, third, and fourth lintels may have grooves. The upper surface of the first threshold may be flat, and the upper surfaces of the second, third, and fourth thresholds may have grooves. In the Japanese-style room structure, fittings are placed between the first lintel and the first threshold, between the second lintel and the second threshold, and between the third lintel and the third threshold, while a space (window) where no fittings are placed is provided between the first lintel and the first threshold, allowing a user to observe the interior of the Japanese-style room structure through the space (window). Furthermore, because the lower surface of the first lintel is flat and the upper surface of the first threshold is flat, no grooves are formed in the window. This allows the interior of the Japanese-style room structure to be observed with a high level of aesthetics.

[0016] [5] In the Japanese-style room structure, the plurality of inner connection portions may further include a third inner connection portion that is arranged in contact with the third outer connection portion on the inside of the third outer connection portion and connects the first outer connection portion and the second outer connection portion, and a fourth inner connection portion that is arranged in contact with the fourth outer connection portion on the inside of the fourth outer connection portion and connects the first outer connection portion and the second outer connection portion. In the Japanese-style room structure, the third inner connection portion and the fourth inner connection portion can further increase the structural strength.

[0017] [6] The Japanese-style room structure may further include joists that support the floor joists and are supported in contact with the first and second outer connection portions. In the Japanese-style room structure, the joists can further increase the structural strength of the floorboards and tatami mat portion.

[0018] [7] In the Japanese-style room structure, the outer connection portion may have a plate shape including a first main surface and a second main surface positioned inwardly and away from the first main surface. This can enhance the aesthetics of the outer connection portion.

[0019] [8] In the Japanese-style room structure, the inner connection portion may be a frame portion having an opening at the center when viewed from the inside to the outside of the Japanese-style room structure. The Japanese-style room structure can be lightweight while further increasing the structural strength of the inner connection portion.

[0020] [9] In the Japanese-style room structure, the frame portion may include a pair of first sides spaced apart from each other in the vertical direction, a pair of second sides connecting first ends of the pair of first sides and connecting second ends of the pair of first sides, and a bridging portion bridging the portions between the first ends and the second ends of the pair of first sides. The Japanese-style room structure is lightweight, yet can further increase the structural strength of the frame portion.

[0021]

[10] In the Japanese-style room structure, the outer connection portion and the inner connection portion may each be made of wood. This is suitable for a Japanese-style room structure in which the outer connection portion and the inner connection portion are each made of wood.

[0022]

[11] The Japanese-style room structural body further includes a plurality of block-shaped wooden support parts that are supported in contact with the lower ends of adjacent inner connection parts and are made of wood, and a plurality of moving devices attached to the lower ends and the support parts. The plurality of support parts may include first support parts that are arranged inside the first inner connection part and the third inner connection part and are in contact with the first inner connection part and the third inner connection part, second support parts that are arranged inside the second inner connection part and the third inner connection part and are in contact with the second inner connection part and the third inner connection part, third support parts that are arranged inside the first inner connection part and the fourth inner connection part and are in contact with the first inner connection part and the fourth inner connection part, and fourth support parts that are arranged inside the third inner connection part and the fourth inner connection part and are in contact with the third inner connection part and the fourth inner connection part. The plurality of moving devices include a first moving device attached to the underside of the lower end portion and the underside of the first support portion, a second moving device attached to the underside of the lower end portion and the underside of the second support portion, a third moving device attached to the underside of the lower end portion and the underside of the third support portion, and a fourth moving device attached to the underside of the lower end portion and the underside of the fourth support portion. The moving devices enable the Japanese-style room structural body to move relatively to the floor, the walls, and the ceiling.

[0023] In the Japanese-style room structure, the moving device is attached not only to the inner connecting part but also to the block-shaped support part and the inner connecting part, so that the attachment strength of the moving device is improved and the Japanese-style room structure can be moved relative to the floor, the wall, and the ceiling.

[0024]

[12] In the Japanese-style room structure, the moving device may include a mounting member attached to the lower end and the support portion, and a wheel rotatable relative to the mounting member. The mounting member and the wheel are suitable for the moving device.

[0025]

[13] In the Japanese-style room structure, the moving device may be a caster. The caster is suitable for the moving device.

[0026]

[14] In the Japanese-style room structure, the outer edge of the upper surface of the tatami section may coincide with the inner edge of the upper surface of the threshold. In the Japanese-style room structure, the upper surface of the tatami section and the upper surface of the threshold are continuous, resulting in an excellent aesthetic appearance.

[0027]

[15] In the Japanese-style room structure, the tatami section may include a first tatami mat that contacts the upper surface of the floorboard, and a second tatami mat that is placed in contact with the upper surface of the first tatami mat and has a different design from the first tatami mat. Depending on the user's preferences, either the first tatami mat or the second tatami mat, which have different designs, can be selected, increasing the degree of freedom for users who enjoy Japanese-style room structures.

[0028]

[16] In the Japanese-style room structure, the outer edge of the upper surface of the second tatami mat may coincide with the inner edge of the upper surface of the threshold. In the Japanese-style room structure, the upper surface of the second tatami mat and the upper surface of the threshold are continuous, resulting in an excellent aesthetic appearance.

[0029]

[17] In the Japanese-style room structure, the inner connection portion may be longer than the outer connection portion in a direction perpendicular to the polygon, the upper surface of the inner connection portion may coincide with the upper surface of the outer connection portion, and the lower surface of the inner connection portion may be located lower than the lower surface of the outer connection portion. In the Japanese-style room structure, the tatami portion may be positioned higher. This brings the tatami portion closer to the user's eyes, allowing the user to observe the Japanese-style room structure up close.

[0030]

[18] The Japanese-style room structure may further include a decorative panel that covers a portion of the inner connection portion that is exposed from the outer connection portion. The Japanese-style room structure has excellent aesthetics.

[0031]

[19] The Japanese-style room structure may further include a staircase attached to a portion of the inner connection part exposed from the outer connection part. In the Japanese-style room structure, the user can easily access the tatami area located at a high position.

[0032] [Specific example of embodiment] One embodiment of a Japanese-style room structure will be described with reference to Figures 1 to 8. Figure 1 is a front view of the Japanese-style room structure. Figure 2 is a plan view of the Japanese-style room structure shown in Figure 1. Figure 3 is a bottom view of the Japanese-style room structure shown in Figure 2. Figure 4 is a cross-sectional view taken along line AA in Figures 3 and 4. Figure 5 is a cross-sectional view taken along line BB in Figures 3 and 4. Figure 6 is a diagram illustrating an inner connection portion. Figure 6 is a cross-sectional view taken along line CC in Figure 3. Figure 7 is a cross-sectional view taken along line DD in Figure 6. Figure 8 is a front view of an example of use of a Japanese-style room structure in which fittings are attached to the second lintel and second threshold.

[0033] [Arrangement of Japanese-style room structure 1 in building 1000] As shown in FIG. 1 , the Japanese-style room structure 1 is placed inside a building 1000. The building 1000 includes a floor 1001, walls 1002, and a ceiling 1003. The ceiling 1003 faces the floor 1001. The wall 1002 connects the floor 1001 and the ceiling 1003. Meanwhile, the Japanese-style room structure 1 is placed without being fixed to any of the floor 1001, walls 1002, and ceiling 1003. In other words, the Japanese-style room structure 1 is not joined to any of the floor 1001, walls 1002, and ceiling 1003 using joints, and is placed, for example, on the top surface of the floor 1001. From another perspective, the Japanese-style room structure 1 is independent from any of the floor 1001, walls 1002, and ceiling 1003. The Japanese-style room structure 1 is located away from the ceiling 1003.

[0034] [Basic structure of Japanese-style room structure 1] The Japanese-style room structure 1 comprises a plurality of pillars 2, a plurality of outer connection parts 3, a plurality of inner connection parts 4 (see Figure 3), a plurality of lintels 5, a plurality of thresholds 6, a plurality of joists 7 (see Figure 3), joists 8 (see Figure 3), floorboards 9 (see Figure 3), a tatami section 10, a plurality of support parts 11 (see Figure 3), and a plurality of moving devices 12.

[0035] [Multiple Columns 2] 2 and 3, the multiple pillars 2 are positioned to correspond to each vertex 23 of a polygon 20 that includes a first pair of sides 21 and a second pair of sides 22. Each of the multiple pillars 2 extends in a direction perpendicular to the polygon 20. As shown in FIGS. 4 and 5, in this embodiment, each of the multiple pillars 2 extends in a vertical direction D1.

[0036] [Multiple outer connections 3] As shown in FIGS. 1 and 3 , the multiple outer connection portions 3 connect the lower ends of the multiple pillars 2. The multiple outer connection portions 3 extend along the sides 21, 22 of the polygon 20. The multiple outer connection portions 3 include a first outer connection portion 31, a second outer connection portion 32, a third outer connection portion 33, and a fourth outer connection portion 34. The first outer connection portion 31 and the second outer connection portion 32 correspond to a first pair of parallel sides 21 of the polygon. The third outer connection portion 33 and the fourth outer connection portion 34 correspond to a second pair of parallel sides 22 of the polygon.

[0037] As shown in FIGS. 4 and 5, each of the outer connection portions 3 has a plate shape. Each of the outer connection portions 3 includes a first main surface 35, a second main surface 36, an upper end surface 37, a lower end surface 38, and a pair of side end surfaces 39 (see FIG. 3). The first main surface 35 is visible from the outside. The second main surface 36 is located inwardly away from the first main surface 35. The second main surface 36 is not visible from the outside. The upper end surface 37 connects the upper edge of the first main surface 35 to the upper edge of the second main surface 36. The lower end surface 38 is located away from the upper end surface 37 in the vertical direction D1. The lower end surface 38 connects the lower edge of the first main surface 35 to the lower edge of the second main surface 36. As shown in FIG. 3, the pair of side end surfaces 39 are located away from each other in the direction extending to the corresponding sides 21, 22. In this embodiment, the outer connection part 3 is made of wood.

[0038] The multiple inner connection portions 4 are arranged inside the multiple outer connection portions 3. The multiple inner connection portions 4 are arranged along the outer connection portions 3 and in contact with the outer connection portions 3. The multiple inner connection portions 4 are not visible from the outside. The multiple inner connection portions 4 include a first inner connection portion 41, a second inner connection portion 42, a third inner connection portion 43, and a fourth inner connection portion 44.

[0039] The first inner connection portion 41 is arranged in contact with the first outer connection portion 31. The first inner connection portion 41 connects the third outer connection portion 33 and the fourth outer connection portion 34. The second inner connection portion 42 is arranged in contact with the second outer connection portion 32. The second inner connection portion 42 connects the third outer connection portion 33 and the fourth outer connection portion 34. The third inner connection portion 43 is arranged in contact with the third outer connection portion 33 on the inner side of the third outer connection portion 33. The third inner connection portion 43 connects the first outer connection portion 31 and the second outer connection portion 32. The fourth inner connection portion 44 is arranged in contact with the fourth outer connection portion 34 on the inner side of the fourth outer connection portion 34. The fourth inner connection portion 44 connects the first outer connection portion 31 and the second outer connection portion 32. In the present embodiment, each of the multiple inner connection portions 4 includes multiple frame portions 45. A plurality of frame portions 45 are arranged in each of the plurality of inner connection portions 4. In this embodiment, two frame portions 45 are arranged in each of the plurality of inner connection portions 4.

[0040] As shown in FIG. 6 , the frame portion 45 includes a pair of first side portions 46, a pair of second side portions 47, and a bridging portion 48. The pair of first side portions 46 are spaced apart from each other in the vertical direction D1. The pair of second side portions 47 connect first end portions 461 of the pair of first side portions 46 and connect second end portions 462 of the pair of first side portions 46. In this embodiment, the first side portion 46A located on the lower side of the pair of first side portions 46 constitutes the lower end portion 40 of the inner connection portion 4. The second end portion 462 is spaced apart from the first end portion 461. The bridging portion 48 connects intermediate portions 463 of the pair of first side portions 46. The intermediate portion 463 is a portion between the first end portion 461 and the second end portion 462. The frame portion 45 has two openings 450 formed in its center when viewed in the interior / exterior direction of the Japanese-style room structural body 1.

[0041] As shown in FIG. 7 , the frame portion 45 has a third plane 451, a fourth plane 452, a second upper end surface 453, a second lower end surface 454, and a pair of second side end surfaces 455 (see FIG. 6 ). The third plane 451 is in contact with and supported by the second main surface 36 of the outer connection portion 3. The third plane 451 is formed by a pair of first side portions 46, a pair of second side portions 47, and a bridging portion 48. The fourth plane 452 is located on the inner side of the second main surface 36 and spaced apart from it. The fourth plane 452 is located on the opposite side to the third plane 451. The fourth plane 452 is formed by a pair of first side portions 46, a pair of second side portions 47, and a bridging portion 48. The second upper end surface 453 is continuous with the upper end surface 37 of the outer connection portion 3. The second upper end surface 453 coincides with the upper end surface 37 of the outer connecting part 3 in the vertical direction D1. The second upper end surface 453 is formed by the first side portion 46B located on the upper side. The second lower end surface 454 is continuous with the lower end surface 38. The second lower end surface 454 is formed by the first side portion 46A located on the lower side. The second lower end surface 454 corresponds to the lower surface 401 of the lower end part 40. In this embodiment, the inner connecting part 4 is made of wood.

[0042] As shown in FIG. 1, multiple lintels 5 connect the upper ends of multiple pillars 2. The multiple lintels 5 extend in a direction in which the upper ends of adjacent pillars 2 face each other. As shown in FIGS. 4 and 5, the multiple lintels 5 have a rectangular shape in a cross section perpendicular to the extension direction. The multiple lintels 5 include a first lintel 51 to a fourth lintel 54 corresponding to the first outer connection portion 31 to the fourth outer connection portion 34, respectively. The first lintel 51 is located away from the first outer connection portion 31 in the vertical direction D1. The second lintel 52 is located away from the second outer connection portion 32 in the vertical direction D1. The third lintel 53 is located away from the third outer connection portion 33 in the vertical direction D1. The fourth lintel 54 is located away from the fourth outer connection portion 34 in the vertical direction D1. In this embodiment, the underside 50 of the first lintel 51 has a flat shape, while the undersides 50 of the second lintel 52, the third lintel 53, and the fourth lintel 54 each have a groove 55. In other words, the underside 50 of the first lintel 51 does not have a groove 55 and consists only of a horizontal surface. Two grooves 55 are arranged for each of the second lintel 52, the third lintel 53, and the fourth lintel 54. As shown by the dashed lines in FIG. 2, each of the two grooves 55 extends along the corresponding side 21 or side 22.

[0043] As shown in FIGS. 4 and 5 , the thresholds 6 are disposed on the upper surfaces of the outer connection portions 3. Specifically, the thresholds 6 are disposed in contact with the upper end surfaces 37 of the outer connection portions 3. The thresholds 6 extend in the direction in which the lower ends of adjacent pillars 2 face each other. The thresholds 6 have a rectangular shape in a cross section perpendicular to the extension direction. The thresholds 6 include a first threshold 61 to a fourth threshold 64, which are located below the first lintel 51 to the fourth lintel 54. The first threshold 61 to the fourth threshold 64 correspond to the first outer connection portion 31 to the fourth outer connection portion 34, respectively. In this embodiment, the upper surface 60 of the first threshold 61 has a flat shape, while the upper surfaces 60 of the second threshold 62, the third threshold 63, and the fourth threshold 64 each have a groove 65. In other words, the upper surface 60 of the first threshold 61 does not have a groove 65 and is composed only of a horizontal surface.

[0044] As shown in FIG. 3 , the multiple joists 7 are arranged between the first inner connection portion 41 and the second inner connection portion 42, spaced apart from the first inner connection portion 41 and the second inner connection portion 42. In other words, the multiple joists 7 are located between the first inner connection portion 41 and the second inner connection portion 42. The multiple joists 7 are arranged spaced apart from one another. The multiple joists 7 extend parallel to the first inner connection portion 41 and the second inner connection portion 42. In other words, the multiple joists 7 extend parallel to the first pair of sides 21. The multiple joists 7 connect the third inner connection portion 43 and the fourth inner connection portion 44. In this embodiment, the multiple joists 7 include a plurality of first joists 71 and a plurality of second joists 72.

[0045] The multiple first joists 71 are connected to the third outer connection portion 33 via the third inner connection portion 43. The multiple first joists 71 are first joists 71A, 71B, and 71C. The first joists 71A, 71B, and 71C are arranged in order from the first inner connection portion 41 toward the second inner connection portion 42. Each of the multiple first joists 71 has a third end face 711, a fourth end face 712, a third side face 713, a fourth side face 714, and a third upper face 715 (see FIG. 5). The third end face 711 contacts a fourth flat surface 452 (see FIGS. 6 and 7) of the upper first side portion 46B of the third inner connection portion 43. The fourth end face 712 is an end face opposite the third end face 711 in a direction parallel to the side 21. The third side surface 713 of the first common joist 71A faces, with a gap between them, the first inner connection portion 41. The fourth side surface 714 of the first common joist 71C faces, with a gap between them, the second inner connection portion 42. As shown in FIG. 5 , the third upper surface 715 is continuous with the second upper end surface 453.

[0046] As shown in FIG. 3, the plurality of second joists 72 are connected to the fourth outer connection portion 34 via the fourth inner connection portion 44. As shown in FIG. 4, the plurality of second joists 72 are the plurality of second joists 72A, 72B, and 72C. The second joists 72A, 72B, and 72C are arranged in order from the first inner connection portion 41 toward the second inner connection portion 42. As shown in FIG. 3, each of the first joists 71A, 71B, and 71C and each of the second joists 72A, 72B, and 72C are located in the same position when viewed in a direction parallel to the side 21. Each of the first joists 71A, 71B, and 71C and each of the second joists 72A, 72B, and 72C sandwiches a joist 8, which will be described next. Each of the multiple second joists 72 has a fifth end face 721, a sixth end face 722, a fifth side end face 723, a sixth side end face 724, and a fourth upper surface 725 (see FIG. 4). The fifth end face 721 contacts the fourth flat surface 452 (see FIGS. 6 and 7) of the upper first side portion 46B of the fourth inner connection portion 44. The sixth end face 722 is the end face opposite the fifth end face 721 in a direction parallel to the side 21. The sixth end face 722 faces the fourth end face 712. The fifth side end face 723 of the second joist 72A faces the first inner connection portion 41 with a gap therebetween. The sixth side end face 724 of the second joist 72C faces the second inner connection portion 42 with a gap therebetween. 5, the fourth upper surface 725 is continuous with the second upper end surface 453. The floor joist 7 is made of wood.

[0047] [Drawer 8] The joists 8 support the joists 7. As shown in FIG. 3, the joists 8 are supported by contacting the first outer connection portion 31 and the second outer connection portion 32. The joists 8 extend parallel to the sides 22. The joists 8 have a pair of seventh end faces 81, a seventh side end face 82, an eighth side end face 83, and a fifth top face 84. Each of the pair of seventh end faces 81 is supported by contacting the second main surface 36 (see FIG. 7) of the first outer connection portion 31 and the second main surface 36 of the second outer connection portion 32, respectively. The seventh side end face 82 is in contact with the fourth end face 712 of each of the multiple first joists 71. As shown in FIG. 5, the eighth side end face 83 is in contact with the sixth end face 722 of each of the multiple second joists 72. The fifth top face 84 connects the seventh side end face 82 and the eighth side end face 83. The fifth upper surface 84 is continuous with the third upper surface 715 of the first floor joist 71 and the fourth upper surface 725 (see FIG. 4) of the second floor joist 72. The fifth upper surface 84 is also continuous with the upper end surfaces 37 of the first outer connection portion 31 and the second outer connection portion 32. The joists 8 are made of wood.

[0048] [Floorboard 9] As shown in FIGS. 4 and 5 , the floorboard 9 is supported by the multiple inner connectors 4 and the multiple joists 7. The floorboard 9 is placed on the multiple inner connectors 4 and the multiple joists 7. The floorboard 9 has a polygonal shape, specifically, a polygon 20 (see the dashed line in FIG. 1 ) including a first pair of sides 21 and a second pair of sides 22. The floorboard 9 includes an upper surface 91 and a lower surface 92. The lower surface 92 is spaced apart from the upper surface 91 in the vertical direction D1. The lower surface 92 contacts the second upper end surfaces 453 of the multiple inner connectors 4, the third upper surface 715 of the first joist 71, and the fourth upper surface 725 of the second joist 72. The material of the floorboard 9 is not limited and may be, for example, wood.

[0049] [Tatami section 10] The tatami portion 10 is supported by the floorboard 9. The tatami portion 10 is placed on the floorboard 9. Specifically, the tatami portion 10 contacts the upper surface 91 of the floorboard 9. The tatami portion 10 includes an upper surface 101. The upper surface 101 is formed by the tatami facing included in the tatami portion 10. The upper surface 101 is not visible from the outside. The outer edge of the upper surface 101 coincides with the outer edge of the upper surface 60 of the threshold 6. In other words, the upper surface 101 is continuous with the upper surface 60.

[0050] [Multiple support parts 11] The multiple support portions 11 are supported by contacting the lower ends 40 of adjacent inner connection portions 4. Each of the multiple support portions 11 has a block shape, specifically, a rectangular parallelepiped shape. As shown in FIG. 3 , the multiple support portions 11 include a first support portion 111, a second support portion 112, a third support portion 113, and a fourth support portion 114. The first support portion 111 is disposed inside the first inner connection portion 41 and the third inner connection portion 43, and is in contact with the first inner connection portion 41 and the third inner connection portion 43. The second support portion 112 is disposed inside the second inner connection portion 42 and the third inner connection portion 43, and is in contact with the second inner connection portion 42 and the third inner connection portion 43. The third support portion 113 is disposed inside the first inner connection portion 41 and the fourth inner connection portion 44, and is in contact with the first inner connection portion 41 and the fourth inner connection portion 44. The fourth support portion 114 is disposed inside the third inner connection portion 43 and the fourth inner connection portion 44, and is in contact with the third inner connection portion 43 and the fourth inner connection portion 44. The multiple support portions 11 include a pair of first side surfaces 115, a pair of second side surfaces 116, and a second lower surface 117. The pair of first side surfaces 115 are adjacent to each other. The pair of first side surfaces 115 are in contact with the lower ends 40 of adjacent inner connection portions 4 (see Figures 4 and 5). The pair of second side surfaces 116 are adjacent to each other. Each of the pair of second side surfaces 116 faces each of the pair of first side surfaces 115. 4 and 5, the second lower surface 117 connects the pair of second side surfaces 116 and the pair of first side surfaces 115. The second lower surface 117 is continuous with the second lower end surface 454 of the inner connecting portion 4. The material of the support portion 11 is not limited and may be, for example, wood.

[0051] [Multiple Mobile Devices 12] As shown in FIG. 3, the plurality of moving devices 12 are attached to the lower end portions 40 (see FIGS. 4 and 5) of adjacent inner connection portions 4 and the support portion 11. The moving devices 12 are not attached to the outer connection portion 3. The plurality of moving devices 12 include a first moving device 121, a second moving device 122, a third moving device 123, and a fourth moving device 124. As shown in FIG. 4, the first moving device 121 is attached to the second lower surface 117 of the first support portion 111 and to the lower surfaces 401 of the lower end portions 40 of the first inner connection portions 41 or the third inner connection portions 43 that are in contact with the first support portion 111 and adjacent to each other. The second moving device 122 is attached to the second lower surface 117 of the second support portion 112 and to the lower surfaces 401 of the lower end portions 40 of the second inner connection portions 42 or the third inner connection portions 43 that are in contact with the second support portion 112 and adjacent to each other. As shown in FIG. 5, the third movement device 123 is attached to the second lower surface 117 of the third support portion 113 and to the lower surface 401 of the lower end portion 40 of the first inner connection portion 41 (see FIG. 3) or the fourth inner connection portion 44, which are in contact with and adjacent to the third support portion 113. As shown in FIG. 3, the fourth movement device 124 is attached to the second lower surface 117 of the fourth support portion 114 and to the lower surface 401 of the lower end portion 40 of the second inner connection portion 42 or the fourth inner connection portion 44, which are in contact with and adjacent to the fourth support portion 114. Each of the multiple movement devices 12 is configured to allow the Japanese-style room structural body 1 to move relatively to the floor 1001, the wall 1002, and the ceiling 1003. The movement device 12 includes a mounting member 125 and wheels 126. The mounting member 125 is attached to the lower end portion 40 and the support portion 11. The mounting member 125 is not attached to the outer connection portion 3. When viewed in the vertical direction D1, the mounting member 125 is offset from the outer connection portion 3. The wheels 126 are rotatable relative to the mounting member 125. The wheels 126 may be configured to be rotatable around an axis parallel to the axis of the column 2. In this embodiment, the moving device 12 is a caster 120.

[0052] [Example of Japanese-style room structure 1] As shown in FIG. 8 , the fitting 13 is arranged between the lintel 5 and the threshold 6, which face each other in the vertical direction D1. In this embodiment, the fitting 13 is arranged in at least one of the following locations: between the first lintel 51 and the first threshold 61; between the second lintel 52 and the second threshold 62; and between the third lintel 53 and the third threshold 63. For example, the fitting 13 is arranged between the second lintel 52 and the second threshold 62. Examples of the fitting 13 include a sliding door 130 and a shoji screen (not shown). The upper end of the sliding door 130 is fitted into a groove 55 (see FIGS. 1 and 4 ). The lower end of the sliding door 130 is fitted into a groove 65 (see FIGS. 1 and 4 ). The sliding door 130 always closes the opening defined by the second lintel 52, the second threshold 62, and the pillars 2, 2 connected thereto. The sliding door 130 is slidable in a direction parallel to the side 21 (see FIG. 2).

[0053] [Variations] Fig. 9 is a cross-sectional view of a first modified example of a Japanese-style room structure. Fig. 10 is a cross-sectional view of a second modified example of a Japanese-style room structure. Fig. 11 is a cross-sectional view of a third modified example of a Japanese-style room structure. Fig. 12 is a plan view with a portion cut away of the Japanese-style room structure shown in Fig. 11.

[0054] [First Modification] As shown in FIG. 9 , in the first modified example, the inner connection portion 4 is longer in the vertical direction D1 than the outer connection portion 3. A second upper end surface 453, which is an example of the upper surface of the inner connection portion 4, coincides with the upper end surface 37, which is an example of the upper surface of the outer connection portion 3. On the other hand, a second lower end surface 454, which is an example of the lower surface of the inner connection portion 4, is located lower than the lower end surface 38, which is an example of the lower surface of the outer connection portion 3. The second lower end surface 454 comes into contact with the floor 1001. The Japanese-style room structural body 1 of the first modified example does not include a support portion 11 and a moving device 12.

[0055] The Japanese-style room structural body 1 further includes a staircase 14 and a decorative panel 15. The staircase 14 is attached, for example, to the third flat surface 451 exposed from the first outer connection portion 31 at the first inner connection portion 41. In this modified example, the staircase 14 has one step. As shown in FIG. 10, the staircase 14 may have multiple steps, specifically, two steps. As shown in FIG. 9, the decorative panel 15 covers, for example, the third flat surface 451 exposed from the second outer connection portion 32 at the second inner connection portion 42.

[0056] [Second Modification] As shown in Figure 10, in the second modified example, the underside 50 of the first lintel 51 has a groove 55. That is, all of the undersides 50 of the multiple lintels 5 have the groove 55. The upper side 60 of the first threshold 61 has a groove 65. That is, all of the upper sides 60 of the multiple thresholds 6 have the groove 65.

[0057] [Third Modification] As shown in Figures 11 and 12, in a third modified example, the tatami section 10 may include a first tatami mat 102 and a second tatami mat 103. In the tatami section 10, the first tatami mat 102 and the second tatami mat 103 are lined up facing upward. The first tatami mat 102 contacts the upper surface 91 of the floorboard 9. The second tatami mat 103 is placed in contact with the upper surface of the first tatami mat 102. The design of the second tatami mat 103 is different from the design of the first tatami mat 102. The second tatami mat 103 forms the upper surface 101 of the tatami section 10. The second tatami mat 103 is always visible from the outside. In this modified example, the outer edge of the upper surface of the second tatami mat 103 coincides with the inner edge of the upper surface 60 of the threshold 6.

[0058] Depending on the user's request, the second tatami mat 103 may be removed from the tatami mat section 10, allowing the first tatami mat 102 to be visible from the outside. Furthermore, the first tatami mat 102 and the second tatami mat 103 may be arranged upside down, with the second tatami mat 103 and the first tatami mat 102 lined up with their tops facing up.

[0059] The above-described embodiments and modifications are merely examples, and the present invention is not limited to these details as long as the features of the invention are not impaired. Furthermore, although various embodiments and modifications have been described above, the present invention is not limited to these details. Other aspects that can be considered within the scope of the technical idea of ​​the present invention are also included within the scope of the present invention. [Explanation of symbols]

[0060] 1 Japanese-style room structure, 2 pillar, 3 outer connection portion, 4 inner connection portion, 5 lintel, 6 threshold, 7 floor joist, 8 joist, 9 floorboard, 10 tatami mat portion, 11 support portion, 12 moving device, 13 fittings, 14 stairs, 15 decorative panel, 20 polygon, 21 edge, 22 edge, 23 vertex, 31 first outer connection portion, 32 second outer connection portion, 33 third outer connection portion, 34 fourth outer connection portion, 35 first main surface, 36 second main surface, 37 upper end surface, 38 lower end surface, 39 side end surface, 40 lower end portion, 41 first inner connection portion, 42 second inner connection portion, 43 third inner connection portion, 44 fourth inner connection portion, 45 frame portion, 46 first side portion, 46A first side portion, 46B first side portion, 47 Second side portion, 48 Bridge portion, 50 Underside, 51 First lintel, 52 Second lintel, 53 Third lintel, 54 Fourth lintel, 55 Groove, 60 Top surface, 61 First threshold, 62 Second threshold, 63 Third threshold, 64 Fourth threshold, 65 Groove, 71 First joist, 71A First joist, 71B First joist, 71C First joist, 72 Second joist, 72A Second joist, 72B Second joist, 72C Second joist, 81 Seventh end surface, 82 Seventh side end surface, 83 Eighth side end surface, 84 Fifth top surface, 91 Top surface, 92 Bottom surface, 101 Top surface, 102 First tatami mat, 103 Second tatami mat, 111 First support portion, 112 Second support portion, 113 Third support portion, 114 Fourth support part, 115 First side surface, 116 Second side surface, 117 Second lower surface, 120 Caster, 121 First moving device, 122 Second moving device, 123 Third moving device, 124 Fourth moving device, 125 Mounting member, 126 Wheel, 401 Lower surface, 450 Opening, 451 Third plane, 452 Fourth plane, 453 2nd upper end surface, 454 2nd lower end surface, 455 2nd side end surface, 461 1st end portion, 462 2nd end portion, 463 Intermediate portion, 711 3rd end surface, 712 4th end surface, 713 3rd side surface, 714 4th side surface, 715 3rd upper surface, 721 5th end surface, 722 6th end surface, 723 5th side end surface, 724 6th side end surface, 725 4th top surface, 1000 Building, 1001 Floor, 1002 Wall, 1003 Ceiling, D1 Vertical.

Claims

1. A Japanese-style room structure that is placed indoors in a building including a floor, walls, and a ceiling, but is not fixed to any of the floor, the walls, and the ceiling, a plurality of pillars positioned to correspond to vertices of a polygon including a first pair of sides and a second pair of sides, and extending in a direction perpendicular to the polygon; a plurality of outer connection parts that connect the lower ends of the plurality of columns and extend along each side of the polygon, the plurality of outer connection parts including a first outer connection part and a second outer connection part that correspond to the first pair of parallel sides of the polygon, and a third outer connection part and a fourth outer connection part that correspond to the second pair of parallel sides of the polygon; a plurality of inner connection parts arranged inside the plurality of outer connection parts along the outer connection parts in contact with the outer connection parts, the plurality of inner connection parts including a first inner connection part arranged in contact with the first outer connection part and connecting the third outer connection part and the fourth outer connection part, and a second inner connection part arranged in contact with the second outer connection part and connecting the third outer connection part and the fourth outer connection part; a plurality of joists disposed between the first inner connection portion and the second inner connection portion, spaced apart from each other and apart from the first inner connection portion and the second inner connection portion, extending parallel to the first inner connection portion and the second inner connection portion, and connecting the third outer connection portion and the fourth outer connection portion; a floorboard disposed on the plurality of inner connection portions and the plurality of floor joists so as to be supported by the plurality of inner connection portions and the plurality of floor joists; A tatami mat portion disposed on the floorboard so as to be supported by the floorboard, The inner connection portion is a frame portion having an opening formed in the center when viewed in the inside and outside direction of the Japanese-style room structure. Japanese-style room structure.

2. A Japanese-style room structure that is placed indoors in a building including a floor, walls, and a ceiling, but is not fixed to any of the floor, the walls, and the ceiling, a plurality of pillars positioned to correspond to vertices of a polygon including a first pair of sides and a second pair of sides, and extending in a direction perpendicular to the polygon; a plurality of outer connection parts that connect the lower ends of the plurality of columns and extend along each side of the polygon, the plurality of outer connection parts including a first outer connection part and a second outer connection part that correspond to the first pair of parallel sides of the polygon, and a third outer connection part and a fourth outer connection part that correspond to the second pair of parallel sides of the polygon; a plurality of inner connection parts arranged inside the plurality of outer connection parts along the outer connection parts in contact with the outer connection parts, the plurality of inner connection parts including a first inner connection part arranged in contact with the first outer connection part and connecting the third outer connection part and the fourth outer connection part, and a second inner connection part arranged in contact with the second outer connection part and connecting the third outer connection part and the fourth outer connection part; a plurality of joists disposed between the first inner connection portion and the second inner connection portion, spaced apart from each other and apart from the first inner connection portion and the second inner connection portion, extending parallel to the first inner connection portion and the second inner connection portion, and connecting the third outer connection portion and the fourth outer connection portion; a floorboard disposed on the plurality of inner connection portions and the plurality of floor joists so as to be supported by the plurality of inner connection portions and the plurality of floor joists; A tatami mat portion disposed on the floorboard so as to be supported by the floorboard, In a direction perpendicular to the polygon, the inner connection portion is longer than the outer connection portion; an upper surface of the inner connection portion coincides with an upper surface of the outer connection portion; A lower surface of the inner connection portion is located lower than a lower surface of the outer connection portion. Japanese-style room structure.

3. A plurality of lintels connecting the upper ends of the plurality of pillars, including a first lintel, a second lintel, a third lintel and a fourth lintel corresponding to the first outer connection portion, the second outer connection portion, the third outer connection portion and the fourth outer connection portion, respectively; a plurality of thresholds disposed on upper surfaces of the plurality of outer connection portions, the plurality of thresholds including a first threshold, a second threshold, a third threshold, and a fourth threshold located respectively below the first outer connection portion, the second outer connection portion, the third outer connection portion, and the fourth outer connection portion; Further provided with The Japanese-style room structure according to claim 1 or 2.

4. The underside of each of the plurality of lintels has a groove, an upper surface of each of the plurality of thresholds having a groove; The Japanese-style room structure according to claim 3.

5. The underside of the first lintel has a flat shape, and the undersides of the second lintel, the third lintel, and the fourth lintel each have a groove; The upper surface of the first threshold has a flat shape, and the upper surfaces of the second threshold, the third threshold, and the fourth threshold each have a groove. The Japanese-style room structure according to claim 3.

6. The plurality of inner connection portions are a third inner connection portion disposed inside the third outer connection portion in contact with the third outer connection portion, connecting the first outer connection portion and the second outer connection portion; a fourth inner connection portion disposed inside the fourth outer connection portion in contact with the fourth outer connection portion, connecting the first outer connection portion and the second outer connection portion, The Japanese-style room structure according to claim 1 or 2.

7. The joist is supported by a joist that is in contact with and supported by the first outer connection portion and the second outer connection portion. The Japanese-style room structure according to claim 6.

8. The outer connection portion has a plate shape including a first main surface and a second main surface located inwardly and away from the first main surface. The Japanese-style room structure according to claim 1 or 2.

9. The inner connection part is a frame part in which an opening is formed in the center when viewed in the inward and outward direction of the Japanese-style room structure, The Japanese-style room structure according to claim 2.

10. The frame portion is a pair of first side portions positioned apart from each other in the up-down direction; a pair of second side portions connecting first ends of the pair of first side portions to each other and connecting second ends of the pair of first side portions to each other; a bridging portion bridging portions between the first end portions and the second end portions of the pair of first side portions, The Japanese-style room structure according to claim 1 or claim 9.

11. Each of the outer connection part and the inner connection part is made of wood. The Japanese-style room structure according to claim 1 or 2.

12. A plurality of wooden support parts each having a block shape, which are supported in contact with the lower end parts of the adjacent inner connection parts; a plurality of movement devices attached to the lower end portion and the support portion, The plurality of support portions include: a first support portion disposed inside the first inner connection portion and inside the third inner connection portion and in contact with the first inner connection portion and the third inner connection portion; a second support portion disposed inside the second inner connection portion and inside the third inner connection portion and in contact with the second inner connection portion and the third inner connection portion; a third support portion disposed inside the first inner connection portion and inside the fourth inner connection portion and in contact with the first inner connection portion and the fourth inner connection portion; a fourth support portion that is disposed inside the third inner connection portion and inside the fourth inner connection portion and that is in contact with the third inner connection portion and the fourth inner connection portion, the plurality of mobile devices, a first moving device attached to a lower surface of the lower end portion and a lower surface of the first support portion; a second moving device attached to a lower surface of the lower end portion and a lower surface of the second support portion; a third moving device attached to a lower surface of the lower end portion and a lower surface of the third support portion; a fourth moving device attached to a lower surface of the lower end portion and a lower surface of the fourth support portion, The moving device allows the Japanese-style room structure to move relatively to the floor, the wall, and the ceiling. The Japanese-style room structure according to claim 6.

13. The moving device is a mounting member attached to the lower end portion and the support portion; a wheel rotatable relative to the mounting member; The Japanese-style room structure according to claim 12.

14. The moving device is a caster. The Japanese-style room structure according to claim 13.

15. The outer edge of the upper surface of the tatami mat portion coincides with the inner edge of the upper surface of the threshold. The Japanese-style room structure according to claim 3.

16. The tatami portion is a first tatami mat that contacts the upper surface of the floorboard; A second tatami mat is placed in contact with the top surface of the first tatami mat and has a design different from that of the first tatami mat. The Japanese-style room structure according to claim 3.

17. The outer edge of the upper surface of the second tatami mat coincides with the inner edge of the upper surface of the threshold. The Japanese-style room structure according to claim 16.

18. Further provided is a decorative plate for covering a portion of the inner connection portion exposed from the outer connection portion. The Japanese-style room structure according to claim 2.

19. The inner connection portion further includes a step attached to a portion exposed from the outer connection portion. The Japanese-style room structure according to claim 2.

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