Buildings and building construction methods

Abstract

To make renovation work on skeleton-infill type buildings easier and cheaper. [Solution] The building 10 comprises a high-ceiling area 11 formed in a cylindrical space that extends from the floor 11c of the lower floor to the roof 15, a lower-floor room 12 located adjacent to the high-ceiling area, and an upper-floor room 13 adjacent to the high-ceiling area and located above the lower-floor room. The high-ceiling area is set to have a ceiling height that exceeds at least the ceiling height of the lower-floor room. A self-supporting residential unit 1 is installed in the high-ceiling area, and the self-supporting residential unit has a floor section 2 with length and width dimensions shorter than the length and width dimensions of the floor of the high-ceiling area in a plan view, and legs 3 that support the floor section. When the self-supporting residential unit is standing on the floor of the high-ceiling area, the floor section is located below the floor 13c of the upper-floor room.

Description

TECHNICAL FIELD

[0001] The present invention relates to a skeleton-infill type building and a construction method thereof. BACKGROUND ART

[0002] In recent years, as one form of housing, so-called skeleton-infill housing is known, which has long-term structural durability and variability of living spaces. The skeleton refers to the building skeleton parts such as columns, beams, and floors of a house, and the infill refers to interiors, facilities, and the like including the entire residential layout inside the skeleton. The skeleton-infill housing has a structure in which the skeleton and the infill are structurally separated, the skeleton is constructed with high strength to have long-term durability, and the layout, interiors, facilities, and the like are configured to have variability. Therefore, the skeleton-infill housing can be lived in for many years, and can be relatively easily renovated in response to changes in the resident's lifestyle or family structure, or to meet the diverse needs of the resident.

[0003] In the skeleton-infill housing described in Patent Document 1, instead of performing renovation work on the infill part for each floor partitioned into upper and lower floors by floors, internal unit bodies each set to a height of one floor are stacked and arranged in one or two stages in a dynamic space spanning the upper and lower floors. PRIOR ART DOCUMENTS PATENT DOCUMENTS

[0004] PATENT DOCUMENT 1 Japanese Unexamined Patent Application Publication No. 2008-050832 SUMMARY OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION

[0005] In conventional skeleton-infill housing renovations, areas where internal units are not installed automatically become open spaces, making it difficult to effectively utilize indoor space. Furthermore, renovations spanning multiple floors require stacking and arranging internal units that are sized to fit entire rooms, which can be extremely time-consuming and costly.

[0006] This invention has been made in view of the above circumstances, and its purpose is to make renovation work in skeleton-infill type buildings easier and cheaper to carry out. [Means for solving the problem]

[0007] The invention described in claim 1 is a building 10, as shown in Figures 1 to 6, The high-ceiling area 11 is formed in a cylindrical, open space from the floor 11c of the lower floor to the roof 15, A lower floor room 12 is located adjacent to the high ceiling area 11, The facility includes an upper-floor room 13 adjacent to the high-ceiling area 11 and located above the lower-floor room 12, The high-ceiling area 11 is set to have a ceiling height that exceeds at least the ceiling height of the lower floor room 12. In the high-ceiling area 11, a self-supporting residential unit 1 is installed on the floor 11c of the high-ceiling area 11. The aforementioned self-contained residential unit 1 is In a plan view, the floor section 2 is set to have dimensions shorter in length and width than the length and width dimensions of the floor 11c of the high ceiling area 11, It has legs 3 that support the floor portion 2, In the state in which the self-supporting residential unit 1 is self-supporting on the floor 11c of the high-ceiling area 11, the floor 2 is located below the floor 13c of the upper-floor room 13.

[0008] According to the invention described in claim 1, the high-ceiling area 11, which is formed in a cylindrical space that extends from the floor 11c of the lower floor to the roof 15, is set to have a ceiling height that exceeds at least the ceiling height of the lower floor room 12, and the floor portion 2 of the freestanding residential unit 1, which is installed independently on the floor 11c of the high-ceiling area 11, is set to have shorter length and width dimensions than the length and width dimensions of the floor 11c of the high-ceiling area 11 in a plan view, and when the freestanding residential unit 1 is freestanding on the floor 11c of the high-ceiling area 11, the floor portion 2 is located below the floor 13c of the upper floor room 13, so by raising the floor portion 2 to the same height as the floor 13c of the upper floor room 13, the freestanding residential unit 1 can be raised inside the high-ceiling area 11, making renovation work spanning upper and lower floors in the high-ceiling area 11 easier and cheaper.

[0009] The invention described in claim 2 is, for example, as shown in Figure 5, in the building 10 described in claim 1, The staircase 14 is adjacent to the high-ceiling area 11 and has a landing 14a in the middle. The above-mentioned self-supporting residential unit 1 is characterized in that the height position of the floor portion 2 and the height position of the landing 14a on the staircase 14 are set to be approximately equal.

[0010] According to the invention described in claim 2, since the height position of the floor portion 2 in the freestanding residential unit 1 and the height position of the landing 14a on the staircase 14 adjacent to the high-ceiling area 11 are set to be approximately equal, when the freestanding residential unit 1 is freestanding on the floor 11c of the high-ceiling area 11, the space above the floor portion 2 (first upper space 31) can be accessed from the landing 14a of the staircase 14. Furthermore, even if the freestanding residential unit 1, which is configured to be accessible from the landing 14a of the staircase 14, is raised by renovation work, although access to the space above the floor portion 2 from the landing 14a will become impossible, structural problems are unlikely to occur in other areas. Therefore, if the freestanding residential unit 1, which is freestanding on the floor 11c of the high-ceiling area 11, is configured to be accessible from the landing 14a of the staircase 14 in this way, it will contribute to making renovation work spanning upper and lower floors in the high-ceiling area 11 easier and cheaper.

[0011] The invention described in claim 3 is, for example, as shown in Figure 5, in the building 10 described in claim 1, An upper-floor opening 13a is formed in the wall 11b located between the high-ceiling area 11 and the upper-floor room 13. The upper floor opening 13a is characterized in that a closing wall portion 13b for closing the upper floor opening 13a is detachably attached to it.

[0012] According to the invention described in claim 3, a closing wall portion 13b is detachably attached to the upper-floor side opening 13a formed in the wall 11b located between the high-ceiling area 11 and the upper-floor room 13. Therefore, after renovation work to raise the self-supporting living unit 1 is carried out, the closing wall portion 13b can be removed, allowing movement between the high-ceiling area 11 and the second room 13 through the upper-floor side opening 13a. In other words, since the high-ceiling area 11 and the second room 13 can be connected simply by removing the closing wall portion 13b, renovation work spanning upper and lower floors in the high-ceiling area 11 can be carried out more easily and inexpensively.

[0013] The invention described in claim 4 is, for example, as shown in Figure 5, in the building 10 described in claim 1, A lower-floor opening 12a is formed in the wall 11b located between the high-ceiling area 11 and the lower-floor room 12. A small wall 12b (removable small wall 12b) for adjusting the opening height of the lower floor side opening 12a is detachably attached to the upper edge of the lower floor side opening 12a.

[0014] According to the invention described in claim 4, a small wall 12b for adjusting the opening height of the lower floor side opening 12a is detachably attached to the upper edge of the lower floor side opening 12a formed in the wall 11b located between the high ceiling area 11 and the lower floor room 12. Therefore, by removing the small wall 12b after renovation work to raise the freestanding living unit 1, the opening height of the lower floor side opening 12a can be increased. In other words, by simply removing the small wall 12b, a lower floor side opening 12a with an opening height that takes into account the ease of moving between the high ceiling area 11 and the lower floor room 12 can be formed, making renovation work spanning upper and lower floors in the high ceiling area 11 easier and cheaper. Furthermore, if the opening height of the lower floor side opening 12a is increased by removing the small wall 12b, it will no longer be necessary to bend down or squat when moving between the high ceiling area 11 and the lower floor room 12, making it easier to move between the high ceiling area 11 and the first room 12.

[0015] The invention described in claim 5 is, for example, as shown in Figures 1 to 6, in a building 10 according to any one of claims 1 to 4, The self-supporting living unit 1 is characterized by having support legs 4 provided below the legs 3 for supporting the self-supporting living unit 1 in an elevated state within the high-ceiling area 11.

[0016] According to the invention recited in claim 5, the self-supporting living unit 1 has support legs 4 provided under the legs 3 for supporting the self-supporting living unit 1 in a raised state inside the high-ceiling region 11, so that the position of the self-supporting living unit 1 in the raised state inside the high-ceiling region 11 can be maintained by the support legs 4. In other words, by merely lifting the self-supporting living unit 1 and disposing the support legs 4 under the legs 3, the self-supporting living unit 1 can be maintained in the raised state, and spaces having different ceiling heights from those before the renovation work (the second lower space 22 and the second upper space 32) can be formed on the lower side and the upper side of the floor part 2, whereby renovation work spanning upper and lower floors in the high-ceiling region 11 can be performed more easily and inexpensively.

[0017] The invention recited in claim 6 is, for example, as shown in Figs. 1 to 6, a method for constructing the building 10 recited in claim 5, the method comprising: a step of lifting the self-supporting living unit 1 inside the high-ceiling region 11 by a lifting means (e.g., a crane Cr); and a step of installing the support legs 4 under the legs 3 of the self-supporting living unit 1, and placing and connecting the legs 3 to the support legs 4.

[0018] According to the invention recited in claim 6, the method includes the step of lifting the self-supporting living unit 1 inside the high-ceiling region 11 by the lifting means, and the step of installing the support legs 4 under the legs 3 of the self-supporting living unit 1, and placing and connecting the legs 3 to the support legs 4, so that the position of the self-supporting living unit 1 in the raised state inside the high-ceiling region 11 can be maintained by the support legs 4, and renovation work spanning upper and lower floors in the high-ceiling region 11 can be performed more easily and inexpensively. [Effects of the Invention]

[0019] According to the present invention, renovation work in a skeleton-infill type building can be performed more easily. [Brief Description of the Drawings]

[0020] [Figure 1] This is a schematic perspective view showing a skeleton-infill house with a self-contained residential unit installed in part. [Figure 2] This is a schematic perspective view showing a freestanding residential unit, installed in part of a skeleton-infill house, in a raised and supported position. [Figure 3] This is a longitudinal cross-sectional view showing a support structure that provides auxiliary support to the floor unit of a freestanding residential unit. [Figure 4] This diagram illustrates how a self-supporting residential unit is lifted by a crane. [Figure 5] This is a longitudinal cross-sectional view illustrating a configuration in which a freestanding residential unit is suspended and supported in a skeleton-infill house. [Figure 6] This is a schematic perspective view showing a freestanding residential unit assembled on top of a pre-installed freestanding residential unit that has been placed in part of a skeleton-infill house. [Modes for carrying out the invention]

[0021] Embodiments of the present invention will be described below with reference to the drawings. However, the embodiments described below are subject to various technically preferred limitations for carrying out the present invention, but the technical scope of the present invention is not limited to the embodiments and illustrated examples below. Note that the directions in the embodiments and illustrated examples below are set solely for the convenience of explanation.

[0022] Figure 1 is a schematic perspective view showing a state in which a freestanding residential unit 1 is installed in a part of a skeleton-infill house 10, and Figure 2 is a schematic perspective view showing a state in which a freestanding residential unit installed in a part of a skeleton-infill house is raised and supported. In this embodiment, the skeleton-infill house 10 is a two-story house, but it may be a house of three stories or more, or a building for purposes other than housing.

[0023] The building structure of Skeleton-Infill House 10 refers to the skeleton portion of the Skeleton-Infill House, which has long-term structural durability while also having flexibility in the living space. In other words, the skeleton refers to the building structure such as columns, beams, and floors of the house. On the other hand, infill refers to the interior, facilities, etc., including the entire house layout inside the skeleton, and the freestanding residential unit 1 corresponds to the infill.

[0024] The type of building frame in the skeleton-infill house 10 of this embodiment is not particularly limited, but for example, a hybrid construction method combining a wooden frame construction method and a panel construction method is employed. That is, multiple building wood panels P are joined to a frame consisting of wooden columns and beams, and it has long-term structural durability.

[0025] A wooden building panel P is constructed by assembling vertical and horizontal frame members Fm in a rectangular shape, and then assembling auxiliary cross members C vertically and horizontally inside the rectangular frame to form a frame body F. A surface material B, such as plywood, is attached to one or both sides of this frame body F, resulting in a hollow internal structure. Furthermore, insulation materials such as glass wool or rock wool are appropriately selected and installed in the hollow internal portion. When wooden building panels P are used as exterior walls, a breathable waterproof sheet is attached to the exterior surface B, and then furring strips 10a are attached over it, and the exterior cladding 10b is attached to the furring strips 10a.

[0026] A portion of the skeleton-infill house 10 shown in Figures 1 and 2 is the high-ceiling area 11 of the skeleton-infill house 10 shown in Figure 5. The high-ceiling area 11 has through columns 11a positioned at its four corners, and these four corner columns 11a are connected by walls 11b made of building wood panels P. The four corner columns 11a may also be connected by beams or girders (not shown). The floor 11c of the high-ceiling area 11 is also constructed of building wood panels P.

[0027] As shown in Figure 5, the high-ceiling area 11 is located adjacent to both the first room 12 on the first floor and the second room 13 on the second floor, which is located above the first room 12. In other words, it is a fundamental premise that the high-ceiling area 11 is set to a ceiling height that exceeds at least the ceiling height of the first floor. In this embodiment, the ceiling height of the high-ceiling area 11 is set lower than the combined ceiling height of the first room 12 and the second room 13, but it may be set to the same ceiling height. If the first room 12 and the second room 13 are each the height of one floor, then the high-ceiling area 11 is set to a height of approximately 1.5 floors.

[0028] Room 12 and Room 23 can be used as living rooms or non-living rooms. A living room is a room that is continuously used by the occupant for purposes such as living, working, or recreation, and includes, for example, a living room, dining room, kitchen, bedroom, children's room, study, or office. A non-living room is a room that is not a living room, and includes, for example, an entrance hall, toilet, bathroom, washroom, changing room, closet, storage room, or corridor.

[0029] The first and second floors are connected by a staircase 14, which has a landing 14a in the middle. The height of the landing 14a corresponds to the height of the floor unit 2 in the self-supporting residential unit 1, which will be described later. The staircase 14 is located adjacent to the high-ceiling area 11.

[0030] A first roof 15 is provided above the high-ceiling area 11, and a second roof 16 is provided above the second room 13. In other words, the high-ceiling area 11 is a cylindrical space that extends from the first floor (11c) up to the first roof 15. In this embodiment, the first roof 15 and the second roof 16 are flat roofs, but are not limited to this, and may be sloped roofs. The first roof 15, located above the high-ceiling area 11, is provided with a skylight 15a that connects the high-ceiling area 11 to the outdoors. The lower side of the architectural wooden panel P that makes up the first roof 15 is the ceiling 15b.

[0031] A freestanding residential unit 1 is installed in the high-ceiling area 11. The freestanding residential unit 1 comprises a floor section 2 positioned above the floor 11c of the high-ceiling area 11, and a plurality of legs 3 that support the floor section 2. Such a self-supporting residential unit 1 is set at a height of half a floor. That is, if the first room 12 and the second room 13 are each at the height of one floor, then the self-supporting residential unit 1 is set at a height of approximately 0.5 floors.

[0032] The floor section 2 is constructed from building wood panels P (see Figure 3). Therefore, the floor section 2 is constructed by assembling vertical and horizontal frame members Fm in a rectangular shape, and by assembling auxiliary cross members C vertically and horizontally inside the rectangular frame to form a frame body F(2a). A surface material B(2b) such as plywood is attached to the upper surface of this frame body F(2a), resulting in a hollow internal structure. Furthermore, insulation materials such as glass wool or rock wool are appropriately selected and installed in the hollow internal section. In addition, decorative surface material 2c that constitutes the ceiling is attached to the lower surface of the frame body F(2a).

[0033] The dimensions in the X-X' direction of the floor section 2 are set to be slightly shorter than the dimensions in the X-X' direction of the floor 11c in the high-ceiling area 11, and the dimensions in the Y-Y' direction of the floor section 2 are set to be slightly shorter than the dimensions in the Y-Y' direction of the floor 11c in the high-ceiling area 11. In other words, in a plan view, the length and width dimensions of the floor section 2 in the freestanding residential unit 1 are set to be shorter than the length and width dimensions of the floor 11c in the high-ceiling area 11. As a result, the area of ​​the floor section 2 is set to be slightly smaller than the area of ​​the floor 11c in the high-ceiling area 11. Therefore, to prevent the gap between the floor section 2 of the freestanding residential unit 1 and the wall 11 of the high-ceiling area 11 from being exposed, a baseboard (not shown) is provided at the junction of the floor section 2 of the freestanding residential unit 1 and the wall 11 of the high-ceiling area 11. Furthermore, when openings (openings 12a, 13a, described later) or windows are formed in the wall 11b of the high ceiling area 11, the dimensions of the frame members such as door frames and window sills that protrude inward are set to fit within the dimensional difference between the floor 2 and the floor 11c.

[0034] The legs 3 are, for example, made up of columnar bodies and are provided on the underside of the four corners of the floor 2 to support it. However, the shape of the legs 3 is not limited to this; they may also be formed in the shape of a wall (see, for example, Figure 4), or storage shelves may be used as legs. Furthermore, the multiple (four corner) legs 3 are positioned so as not to protrude from the outer edge of the floor 2.

[0035] The floor section 2 and the leg section 3 are integrated. Furthermore, since the freestanding living unit 1 can stand on its own on the floor 11c of the high-ceiling area 11, it can be treated as furniture.

[0036] A lower space 21 is formed between the floor 11c and the floor 2 of the high-ceiling area 11, and an upper space 31 is formed between the ceiling 15b and the floor 2 of the high-ceiling area 11. In the following explanation, in the state shown in Figure 1, that is, the state in which the freestanding residential unit 1 is freestanding on the floor 11c of the high ceiling area 11 (hereinafter referred to as the freestanding state), the lower space 21 will be referred to as the first lower space 21, and the upper space 31 will be referred to as the first upper space 31.

[0037] The first lower space 21 has a ceiling height set between 0.8m and 1.4m. Therefore, the first lower space 21 is not used as a living room, but as a non-living room, particularly as a storage room. However, its use is not limited to a storage room, and it may be used for other purposes as well.

[0038] Furthermore, the first lower space 21 allows for the loading and unloading of stored items from the adjacent first room 12. Specifically, among the walls 11b surrounding the first lower space 21, the wall 11b facing the first room 12 has an opening 12a on the lower floor side, which is used for loading and unloading stored items or for people to enter and exit. The opening 12a may be opened and closed by a fitting (not shown), but a fitting is not required.

[0039] The first upper space 31 has a ceiling height of 2.1m or more (preferably 2.4m or more). Therefore, the first upper space 31 can be used as both a living room and a non-living room. In the freestanding state of the self-supporting residential unit 1, the height of the upper surface of the floor 2 and the height of the upper surface of the landing 14a on the staircase 14 are set to be approximately equal. Therefore, the first upper space 31 can be accessed from the landing 14a. More specifically, the staircase 14 is provided adjacent to the wall 11b of the high-ceiling area 11, and the first upper space 31 can be accessed from the landing 14a through an entrance (not shown) formed in the wall 11b of the high-ceiling area 11. This entrance (not shown) will be closed after the renovation work.

[0040] As shown in Figure 4, the freestanding residential unit 1 can be lifted and moved by a crane Cr. More specifically, the crane Cr is equipped with a boom Bm and can be suspended by a wire Wr extending from the boom Bm. Therefore, when constructing a new skeleton-infill house 10, the freestanding residential unit 1 can be lifted by the crane Cr and installed on the floor 11c of the high-ceiling area 11. The freestanding residential unit 1 may also be assembled within the high-ceiling area 11.

[0041] Furthermore, the high-ceiling area 11 can be renovated across floors in accordance with changes in the residents' lifestyles and family structure, or to meet the diverse needs of the residents. That is, as shown in Figures 2 and 5, the high-ceiling area 11 can be renovated by raising the freestanding residential unit 1, thereby changing the height of the floor 2 of the freestanding residential unit 1. Before the renovation, the high-ceiling area 11 has two different room patterns due to being divided vertically by the freestanding residential unit 1, and even after the renovation, it functions as a multi-zone with two different room patterns than before the renovation.

[0042] As shown in Figures 4 and 5, the freestanding residential unit 1 can be lifted by a crane Cr and raised within the high-ceiling area 11. The wire Wr can be positioned within the high-ceiling area 11 through the skylight 15a of the first roof 15. Since the wire Wr is lifted by a four-point suspension, only one wire Wr passes through the skylight 15a, and it branches into four wires Wr within the high-ceiling area 11. The four wires Wr are hooked onto eyebolts attached to the four corners of the floor 2 of the freestanding residential unit 1.

[0043] The freestanding residential unit 1, lifted by the crane Cr, is raised until its floor 2 is at the same height as the floor 13c of the second room 13. To maintain this height, support legs 4 are provided between the legs 3 of the freestanding residential unit 1 and the floor 11c of the high-ceiling area 11.

[0044] As shown in Figure 2, the multiple support legs 4 are formed to have the same cross-sectional shape as the legs 3 of the self-supporting living unit 1, and when the legs 3 are placed on top of the support legs 4, the sides of the legs 3 and the sides of the support legs 4 are flush. The height of the support legs 4 is set to such a height that the floor 2 of the freestanding living unit 1 is at the same height as the floor 13c of the second room 13.

[0045] Although not shown in the diagram, the lower ends of the multiple legs 3 and the upper ends of the multiple support legs 4 in the freestanding residential unit 1 are connected by connecting means. As such connecting means, for example, connecting hardware used to connect structural members in wooden frame construction (such as column base hardware, column top hardware, drift pin hardware, mortise pipes, and connecting plates) may be used as appropriate. Furthermore, the lower ends of the multiple support legs 4 may also be fixed to the floor 11c of the high-ceiling area 11 using metal fittings such as column base fittings. This will allow the freestanding residential unit 1 to be supported more stably. These multiple support legs 4 may be fixed to any of the columns 11a, walls 11b, or floor 11c of the high ceiling area 11.

[0046] Furthermore, in order to provide even more stable support to the freestanding residential unit 1 supported by multiple support legs 4, the floor portion 2 of the freestanding residential unit 1 may be supported by the wall 11b of the high-ceiling area 11. In other words, as shown in Figure 3, the floor portion 2 of the freestanding residential unit 1 may be placed on a support member 18 fixed to the wall 11b. The support member 18 is fixed by screws to a fixing base 18a that is pre-built into the building wood panel P that makes up the wall 11b. The support member 18 is a long batten in the X-X' and Y-Y' directions of the wall 11b. In addition, a notch 2d is formed on the lower surface of the wall 11b side end of the floor portion 2. When this notch 2d is placed on the support member 18, the floor portion 2 of the freestanding residential unit 1 is supported by the wall 11b of the high ceiling area 11. The height of the support member 18 is set such that when the floor portion 2 of the freestanding residential unit 1 is placed on the support member 18, the legs 3 of the freestanding residential unit 1 are placed on the support legs 4. Furthermore, since the support member 18 is installed below the floor portion 2 of the freestanding residential unit 1, it is fixed to the wall 11b while the freestanding residential unit 1 is being lifted during renovation work.

[0047] In a self-supporting residential unit 1 supported by multiple support legs 4, the lower space 21 (22) is referred to as the second lower space 22 because the ceiling height is changed, and at the same time, the upper space 31 (32) is also referred to as the second upper space 32 because the ceiling height is changed. That is, the lower space of the self-supporting residential unit 1 before lifting is referred to as the first lower space 21, and the lower space after lifting is referred to as the second lower space 22. Furthermore, the upper space of the self-supporting residential unit 1 before lifting is referred to as the first upper space 31, and the upper space after lifting is referred to as the second upper space 32.

[0048] The second lower space 22 of the freestanding residential unit 1, which is supported by multiple support legs 4, has a ceiling height of 2.1m or more (preferably 2.4m or more). Therefore, the second lower space 22 can be used as both a living room and a non-living room.

[0049] Furthermore, this second lower space 22 allows people to enter and exit from the adjacent first room 12. That is, the opening 12a formed in the wall 11b facing the first room 12 among the walls 11b surrounding the second lower space 22 is not tall enough for people to enter and exit without difficulty. Therefore, in the renovation work, the opening is widened in the height direction and remodeled into an entrance 12a set at a height that allows people to enter and exit without bending or crouching. In this embodiment, the opening 12a is originally formed as an entrance 12a set at a height that allows people to enter and exit without bending or crouching, and in the state before the lifting of the freestanding residential unit 1, the removal small wall 12b is attached to the upper frame and the upper ends of both side frames of the entrance 12a, forming an opening 12a with a short vertical dimension. Then, after the lifting of the freestanding residential unit 1, the removal small wall 12b is removed by the renovation work, and the entrance 12a of the original height appears. The entrance 12a after the renovation work may be opened and closed by a door or window (not shown), but it is also not necessary to provide such a door or window.

[0050] When the freestanding residential unit 1 is supported by multiple support legs 4, it is set at the same height as the floor 13c of the second room 13, as described above. In this state, the ceiling height of the second upper space 32 of the freestanding residential unit 1 is set to 0.8m to 1.4m. Therefore, the first lower space 21 is not used as a living room, but as a non-living room, particularly as a storage room. However, its use is not limited to a storage room, and it may be used for other purposes.

[0051] Furthermore, the second upper space 32 allows for the loading and unloading of stored items from the adjacent second room 13. Specifically, among the walls 11b surrounding the second upper space 32, the wall 11b facing the second room 13 has an opening 13a on the upper floor side for loading and unloading stored items or for people to enter and exit.

[0052] The opening 13a for entering and exiting the second upper space 32 is closed by the closing wall 13b in the state before the freestanding residential unit 1 is lifted (before renovation work). Then, after the freestanding residential unit 1 is lifted, the closing wall section 13b is removed and the opening 13a is opened. In other words, this opening 13a is formed in the wall 11b in advance and is closed by the closing wall section 13b before the renovation work. After the freestanding residential unit 1 is lifted by the renovation work, the second upper space 32 will be used from the second room 13, so the closing wall section 13b is removed and the opening 13a is opened. The entrance 13a after the renovation work may be opened and closed by a door or window (not shown), but it is also not necessary to provide such a door or window. The closing wall section 13b is detachably attached and fixed to the wall 11b in which the opening 13a is formed. However, in the state before the renovation work, when the opening 13a is closed, it is located at a high position in the first upper space 31, and therefore cannot be easily removed to ensure safety. It must be removed only after the renovation work is completed.

[0053] In Figure 5, the removal wall 12b and the closing wall section 13b are depicted as thinner than the wall 11b of the high ceiling area 11 to emphasize the existence of the openings 12a and 13a, as well as the removal wall 12b and the closing wall section 13b. However, in reality, the removal wall 12b and the closing wall section 13b may be formed to the same thickness as the wall 11b.

[0054] As described above, the skeleton-infill house 10, which has a high-ceiling area 11, allows for renovation work on the infill portion by introducing a freestanding residential unit 1, enabling it to be moved between floors. Moreover, the support legs 4 that support the freestanding residential unit 1 have the same cross-sectional shape as the legs 3, making large-scale renovation work unlikely.

[0055] The support legs 4 and the legs 3 supported by the support legs 4 may be left exposed, but they may also be covered with a wall finishing material so that they appear as columns within the second lower space 22. Alternatively, the entire surface may be finished with a wall finishing material so that they do not appear as columns.

[0056] This embodiment provides the following excellent effects. In other words, the high-ceiling area 11, which is formed in a cylindrical space that extends from the floor 11c to the roof 15, is set to have a ceiling height that exceeds at least the ceiling height of the first room 12. The floor portion 2 of the freestanding residential unit 1, which is installed independently on the floor 11c of the high-ceiling area 11, is set to have shorter length and width dimensions than the length and width dimensions of the floor 11c of the high-ceiling area 11 in a plan view. When the freestanding residential unit 1 is freestanding on the floor 11c of the high-ceiling area 11, the floor portion 2 is located below the floor 13c of the second room 13. Therefore, by raising the floor portion 2 to the same height as the floor 13c of the second room 13, the freestanding residential unit 1 can be raised inside the high-ceiling area 11, making renovation work that spans upper and lower floors in the high-ceiling area 11 easier and cheaper.

[0057] Furthermore, since the height of the floor 2 in the freestanding residential unit 1 and the height of the landing 14a on the staircase 14 adjacent to the high-ceiling area 11 are set to be approximately equal, when the freestanding residential unit 1 is freestanding on the floor 11c of the high-ceiling area 11, the first upper space 31 of the floor 2 can be accessed from the landing 14a of the staircase 14. Even if the freestanding residential unit 1, which is configured to be accessible from the landing 14a of the staircase 14, is raised through renovation work, although access to the upper space of the floor 2 from the landing 14a will become impossible, structural problems are unlikely to occur in other areas. Therefore, if the freestanding residential unit 1, which is freestanding on the floor 11c of the high-ceiling area 11, is configured to be accessible from the landing 14a of the staircase 14 in this way, it will contribute to making renovation work spanning upper and lower floors in the high-ceiling area 11 easier and cheaper.

[0058] Furthermore, a closing wall 13b is detachably attached to the upper-floor opening 13a formed in the wall 11b located between the high-ceiling area 11 and the second room 13. Therefore, after the renovation work to raise the freestanding living unit 1 is completed, the closing wall 13b can be removed, allowing movement between the high-ceiling area 11 and the second room 13 through the upper-floor opening 13a. In other words, by simply removing the closing wall 13b, the high-ceiling area 11 and the second room 13 can be connected, making renovation work spanning upper and lower floors in the high-ceiling area 11 easier and cheaper.

[0059] Furthermore, a removable small wall 12b for adjusting the opening height of the lower floor opening 12a is detachably attached to the upper edge of the lower floor opening 12a formed in the wall 11b located between the high-ceiling area 11 and the first room 12. Therefore, by removing the removable small wall 12b after the renovation work to raise the freestanding residential unit 1, the opening height of the lower floor opening 12a can be increased. In other words, by simply removing the removable small wall 12b, a lower floor opening 12a with an opening height that takes into account the ease of movement between the high-ceiling area 11 and the lower floor room 12 can be formed, making renovation work spanning upper and lower floors in the high-ceiling area 11 easier and cheaper. Furthermore, by removing the small wall 12b for removal and increasing the height of the opening 12a on the lower floor side, it will no longer be necessary to bend down or squat when moving between the high-ceiling area 11 and the first room 12, making it easier to move between the high-ceiling area 11 and the first room 12.

[0060] Furthermore, the freestanding residential unit 1 has support legs 4 provided below the legs 3 to support the freestanding residential unit 1 in an elevated state within the high-ceiling area 11. The support legs 4 maintain the elevated position of the freestanding residential unit 1 within the high-ceiling area 11. In other words, by simply raising the freestanding residential unit 1 and providing support legs 4 below the legs 3, the elevated state of the freestanding residential unit 1 can be maintained, and spaces with different ceiling heights (second lower space 22, second upper space 32) can be formed above and below the floor 2, making renovation work spanning upper and lower floors in the high-ceiling area 11 easier and cheaper.

[0061] Furthermore, the construction method for the skeleton-infill house 10 includes the steps of raising the freestanding residential unit 1 inside the high-ceiling area 11 using a crane Cr, which is a lifting means, and installing support legs 4 under the legs 3 of the freestanding residential unit 1, and placing the legs 3 on the support legs 4 to connect them. As a result, the position of the freestanding residential unit 1 in the raised state inside the high-ceiling area 11 can be maintained by the support legs 4, making renovation work spanning upper and lower floors in the high-ceiling area 11 easier and cheaper.

[0062] Furthermore, in recent years, there has been a growing demand for the realization of a decarbonized society through the promotion of carbon neutrality, which aims to reduce carbon dioxide emissions to virtually zero, and for the achievement of the Sustainable Development Goals (SDGs). In the construction industry, efforts are also being made to use wood, which reduces carbon dioxide emissions, for buildings. In this embodiment, the skeleton-infill type building 10 has a structure that is a hybrid of wooden frame construction and panel construction, and the self-supporting residential unit 1 is also made of wood, thus contributing to the realization of a decarbonized society through the promotion of carbon neutrality and the achievement of the SDGs.

[0063] [Variation] The embodiments to which the present invention can be applied are not limited to those described above, and can be modified as appropriate without departing from the spirit of the invention. Modifications are described below. The following modifications may be combined as much as possible. Furthermore, in each of the following modifications, elements common to the above-described embodiments are denoted by the same reference numerals, and their descriptions are omitted or simplified.

[0064] [Variation 1] Figure 6 is a schematic perspective view showing a self-supporting residential unit 1A assembled on top of a pre-installed self-supporting residential unit 5 that is located in part of a skeleton-infill house 10. In this modified example, the floor section 6 of the previously installed self-supporting residential unit 5 is configured to be removable. Figure 6 shows the state in which most of the floor section 6 has been removed. A remodeled freestanding residential unit 1A, configured in the same way as the freestanding residential unit 1 described in the above embodiment, is placed on top of the preceding freestanding residential unit 5.

[0065] The pre-fabricated freestanding residential unit 5 is installed on the floor 11c of the high-ceiling area 11 and will not be moved even after the renovation work on the high-ceiling area 11. Instead, most of the floor 6 is designed to be removable. This floor 6 is designed to be separable, for example, into an outer frame-like portion and a central portion, and Figure 6 shows the state in which only the outer frame-like portion remains.

[0066] Of the frame-like portions on the outer perimeter of the floor portion 6, the beam portion 6a may also be configured to be removable, or it may not be removed and may be configured to provide structural strength as a frame-like portion.

[0067] The central portion of the floor 6 that will be removed will be removed after the remodeled freestanding residential unit 1A is assembled on top of the preceding freestanding residential unit 5. This makes it possible to safely construct the remodeled freestanding residential unit 1A while using the preceding freestanding residential unit 5 as a stable base.

[0068] [Variation 2] In the above embodiment, a crane Cr was used to raise the freestanding residential unit 1, but in this modified example, a hydraulic jacking device is used to raise the freestanding residential unit 1.

[0069] To explain in more detail, first, a support base for jacks is installed below the floor 2 of the freestanding residential unit 1, and multiple hydraulic jack devices are balanced on the support base to raise the freestanding residential unit 1 to a certain height.

[0070] Next, temporary support legs are interposed under each of the multiple legs 3 of the self-supporting residential unit 1 to support the self-supporting residential unit 1 and maintain the height that was raised by the hydraulic jack device.

[0071] Next, an additional support base lower than the temporary support legs is installed on top of the jack support base located below the floor section 2, thereby raising the height of the jack support base. Then, multiple hydraulic jack devices are evenly placed on the raised jack support base, and the self-supporting living unit 1 is raised to a certain height again.

[0072] When the freestanding residential unit 1 is raised, the multiple legs 3 of the freestanding residential unit 1 separate from the multiple temporary support legs. Therefore, additional temporary support legs are interposed between the multiple legs 3 and the multiple temporary support legs to support the freestanding residential unit 1 and maintain the height increased by the hydraulic jack device.

[0073] Next, additional support bases lower than the additional temporary support legs are placed on top of the raised jack support bases to further raise the jack support bases. Then, multiple hydraulic jack devices are balanced and placed on the raised jack support bases to raise the self-supporting living unit 1 to a certain height.

[0074] The same procedure can then be repeated to raise the freestanding residential unit 1 to the desired height. Once the freestanding residential unit 1 has reached the desired height, the temporary support legs are removed while the freestanding residential unit 1 remains supported by multiple hydraulic jacks, and the permanent support legs 4 are installed.

[0075] According to this modified version, the self-supporting residential unit 1 can be raised without using a crane Cr. Therefore, even if a skeleton-infill house 10 is constructed on a plot of land where a crane Cr cannot reach, renovation work on the high-ceiling area 11 becomes possible.

[0076] [Variation 3] Although not shown in the diagram, of the column-beam structure and walls 11b (architectural wood panels P) that constitute the high-ceiling area 11, if the load-bearing capacity can be ensured by the column-beam structure alone, any wall 11b surrounding the high-ceiling area 11 can be removed as appropriate. If it is necessary to secure the minimum required number of walls 11b, the wall 11b and the column-beam structure can be left in place, and the other walls 11b can be removed as appropriate. As a result, the freestanding residential unit 1 (lower spaces 21, 22 or upper spaces 31, 32) may be open to the stairwell side where the stairs 14 are located, or it may be open to the first room 12 side. [Explanation of Symbols]

[0077] 1. Self-contained residential unit 2 Floor 2c decorative surface material 2d Notch 3 legs 4 Support legs 10 Skeleton-Infill Houses 11 High ceiling area 11a pillar 11b wall 11c floor 12 First Room 12a Lower floor opening 12b Small wall for removal 13 Second Room 13a Upper floor opening 13b Blocking wall 13c floor 14 stairs 14a Landing 15 First Roof 15a Skylight 15b Ceiling 18 Received material 21 First lower space 22 Second lower space 31 First upper space 32 Second upper space P Architectural wood panels

Claims

1. The high-ceiling area is formed in a cylindrical space that extends from the floor of the lower level to the roof, A lower-floor room located adjacent to the aforementioned high-ceiling area, The system includes an upper-floor room adjacent to the high-ceiling area and located above the lower-floor room, The aforementioned high-ceiling area is set to have a ceiling height that exceeds at least the ceiling height of the lower floor room. In the high-ceiling area, a self-supporting residential unit is installed on the floor of the high-ceiling area. The aforementioned self-sufficient residential unit is In a plan view, the floor section is set to have dimensions shorter in length and width than the length and width of the floor in the high ceiling area, It has legs that support the floor portion, A building characterized in that, when the self-supporting residential unit is self-supporting on the floor of the high-ceiling area, the floor is located below the floor of the upper-floor room.

2. In the building described in claim 1, Adjacent to the aforementioned high-ceiling area is a staircase with a landing in the middle. A building characterized in that the height position of the floor in the self-supporting residential unit and the height position of the landing in the staircase are set to be approximately equal.

3. In the building described in claim 1, An opening on the upper floor side is formed in the wall located between the high-ceiling area and the upper-floor room. A building characterized in that a closing wall portion for closing the opening on the upper floor side is detachably attached to the opening on the upper floor side.

4. In the building described in claim 1, An opening on the lower floor side is formed in the wall located between the high-ceiling area and the lower floor room. A building characterized in that a small wall for adjusting the opening height of the lower floor opening is detachably attached to the upper edge of the lower floor opening.

5. In a building according to any one of claims 1 to 4, The building is characterized in that the self-supporting residential unit has support legs provided below the legs for supporting the self-supporting residential unit in an elevated state within the high-ceiling area.

6. A method for constructing the building described in claim 5, A step of raising the self-supporting residential unit within the high-ceiling area using a lifting means, A method for constructing a building, characterized by comprising the steps of: installing the support legs below the legs of the self-supporting residential unit, and placing the legs on the support legs to connect them.

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