Staircase lower structure

Abstract

[Problem] To provide a staircase lower structure capable of effectively utilizing a space and achieving both work from home and watching of a child. [Solution] A staircase lower structure 1 has a straight part 10 at least not folded back, is adjacent to a living room 5, and is formed under a staircase 2 connecting a lower floor and an upper floor. The staircase lower structure 1 includes: a gradient ceiling 3 formed on a lower side of the straight part 10; and a staircase lower space 4 formed under a staircase including at least a lower side of the gradient ceiling 3. The staircase lower space 4 is arranged on the lower side of the gradient ceiling 3 and separated into two spaces by a spandrel wall 17 rising from a floor surface 13 of the lower floor. The two spaces are a child space 7 arranged on a low side of the gradient ceiling 3 and a work space 6 arranged on a high side of the gradient ceiling 3 and having a desk top plate 27 protruding from the spandrel wall 17.

Description

Under-stair structure

[0001] The present invention relates primarily to under-stair structures in residential buildings.

[0002] The space under the stairs in houses and other buildings has a low, sloped ceiling, which is not suitable for use as a normal living space, so it has traditionally been used for storage, toilets, etc.

[0003] Various inventions have been made to make more effective use of the space under the stairs. For example, inventions have been proposed that provide a home office or workspace under the stairs (see Patent Documents 1 and 2). In these inventions, a workspace or the like that is used primarily in a seated position is provided under the stairs, so even in spaces with low ceilings, there is less of a feeling of oppression, and the space under the stairs can be used more effectively.

[0004] There have also been proposals for creating a play area or study space for children in the space under the stairs (see Patent Documents 3 and 4). If the space under the stairs is used as a children's space, even if the ceiling is low, it is less likely to get in the way, and a space with a moderately low ceiling has the advantage of making it easier for children to engage in sedentary activities such as taking a nap, reading, or studying.

[0005] JP 2003-227237 A JP 2013-57172 A JP 2014-62419 A JP 2015-209646 A

[0006] In recent years, the number of opportunities to work from home has increased, and homes are now in need of spaces suitable for working from home. Furthermore, those raising children who work from home often want to be able to work from home while also keeping an eye on their children.

[0007] Therefore, the present invention aims to provide an under-stair structure that allows for effective use of space and enables people to work from home while also keeping an eye on their children.

[0008] The first invention of the present application is an under-stair structure formed under a staircase that has at least a straight section that does not turn back, is adjacent to a living room, and connects the lower floor and the upper floor, and is equipped with a sloped ceiling formed below the straight section, and an under-stair space formed under the stairs that includes at least the underside of the sloped ceiling, and the under-stair space is separated into two spaces by a waist wall that is positioned below the sloped ceiling and rises from the floor surface of the lower floor, and the two spaces are a children's space that is positioned on the lower side of the sloped ceiling, and a work space that is positioned on the higher side of the sloped ceiling and has a desk top protruding from the waist wall.

[0009] The second invention of the present application is a staircase under-structure of the first invention, in which a transparent plate is erected on the waist wall, and the upper end of the transparent plate is connected to the sloped ceiling.

[0010] The third invention of the present application is the under-stairs structure of the second invention, in which the children's space is open toward the living room, a first partition wall with fittings installed is provided between the work space and the living room, and the entire under-stairs space is closed off by a second partition wall on the side opposite the living room.

[0011] A fourth aspect of the present invention is the under-stair structure of the third aspect, wherein the fixture has a transparent portion.

[0012] The fifth invention of the present application is the under-stair structure of the first invention, wherein the work space is formed facing an exterior wall on the side opposite the children's space, and a high window is formed along the exterior wall.

[0013] A sixth aspect of the present invention is the under-stair structure of the fifth aspect, wherein the high window is openable and closable.

[0014] The seventh invention of the present application is the under-staircase structure of the fifth invention, in which a built-in shelf storage is formed under the high window along the exterior wall.

[0015] The eighth invention of the present application is the under-stair structure of the third invention, wherein the children's space is a space surrounded by the floor of the lower floor, the sloped ceiling, the waist wall and the transparent panel, and a vertical wall surface provided on the opposite side of the waist wall, and the open boundary between the children's space and the living room is formed in a mountain shape with its upper edge being a first sloped section that follows the sloped ceiling and a second sloped section that has an opposite slope to the first sloped section.

[0016] A ninth invention of the present application is the under-stair structure of the third invention, wherein a soundproof structure is arranged in the space above the sloped ceiling or the second partition wall.

[0017] According to the first invention of the present application, the staircase has at least a straight section that does not turn back, and the space under the staircase, including the sloped ceiling formed below the straight section, is separated into two spaces by a waist wall. The two spaces are a children's space and a work space with a desk top protruding from the waist wall. When working from home facing the desk top from the work space side, the children's space can be seen on the other side across the waist wall, allowing desk work while keeping an eye on the child. Furthermore, since the children's space is located on the low side of the sloped ceiling and the work space is located on the high side of the sloped ceiling, the children's space can be a small space with a low ceiling that children will want to hide in, and by using the side with a higher ceiling than the children's space as the work space, a space with two functions can be created under the stairs, thereby further improving space efficiency.

[0018] According to the second invention of the present application, a waist wall and a transparent panel extending from the top of the waist wall to the sloped ceiling are installed between the children's space and the work space, so that the children can be watched from the work space while sounds made by the children are blocked to a certain extent, and for example, sounds made by the children can be prevented from being picked up by the microphone during a remote conference, etc.

[0019] According to the third invention of the present application, the children's space is open to the living room, so that children can be kept an eye on whether they are in the work space or the living room. Furthermore, a first partition wall with fixtures installed is provided between the work space and the living room, and the opposite side of the living room is closed off by a second partition wall, so that the sounds of other residents' daily lives are less likely to enter the work space, allowing desk work and remote meetings to be carried out in a quieter environment.

[0020] According to the fourth invention of the present application, the fixtures installed on the first partition wall have transparent parts, which prevents the work space from feeling claustrophobic and makes it a more comfortable space.

[0021] According to the fifth aspect of the present invention, the side of the work space opposite the children's space faces an exterior wall, and a high window is formed along the exterior wall, allowing light to be drawn into the work space during the day, and a transparent panel is provided at the boundary between the work space and the children's space, allowing light to be drawn into the children's space from the high window. In particular, the high window allows light to reach further outdoors, allowing more light to be drawn into the children's space.

[0022] According to the sixth aspect of the present invention, the high window can be opened and closed, so that the work space can be ventilated.

[0023] According to the seventh invention of the present application, a built-in storage shelf is formed under the high window, so documents, books, laptops, etc. necessary for desk work can be stored. Because the window is a high window, storage can be done without blocking the window.

[0024] According to the eighth aspect of the present invention, the open boundary between the children's space and the living room has an upper edge formed in a mountain shape with a first sloped section that follows the sloped ceiling and a second sloped section that is the opposite slope to the first sloped section, so the entrance to the children's space from the living room can be designed like the gable of a house, making it easy for children to enter. Furthermore, because the second sloped section is formed, the upper edge of the boundary is mountain-shaped rather than sloped, so the inner periphery can be made into an obtuse-angled opening, which makes it easier to do work such as laying wallpaper during construction.

[0025] According to the ninth invention of the present application, the attic space of the sloped ceiling and the second partition wall have a soundproof structure, which blocks out sounds from going up and down stairs and everyday life on the other side of the second partition wall, thereby improving the soundproofing of the work space.

[0026] A partially omitted horizontal cross-sectional view illustrating the configuration of the under-stair structure. A partially omitted vertical cross-sectional view illustrating the configuration of the stairs and under-stair space. A diagram in which the description of the fittings has been added to the partially omitted vertical cross-sectional view of Figure 2, which explains the relationship between the home office and the fittings. A diagram illustrating the first partition wall as seen from the living room side and the entrance formed at the boundary between the children's space and the living room. A diagram illustrating lighting and ventilation from a high window. An enlarged cross-sectional view illustrating the point where sound-proofing material is placed inside the second partition wall. A partially omitted horizontal cross-sectional view illustrating a modified example in which the stairs are placed inside the living room like a living room staircase. A perspective drawing illustrating a modified example in which the stairs are placed inside the living room like a living room staircase.

[0027] The following describes an embodiment of the under-stair structure of the present invention with reference to the drawings. The under-stair structure 1 of this embodiment is installed in a building such as a two-story or higher detached house or a maisonette-type apartment building, and includes a staircase 2 connecting the lower floor and the upper floor, a sloped ceiling 3 formed below the staircase 2, and an under-stair space 4 formed below the staircase including the underside of the sloped ceiling 3.

[0028] As shown in Figure 1, the staircase 2 is arranged on the lower floor with one side adjacent to the living room 5. In this embodiment, the living room 5 is a space that includes a living room, a dining room, or both. Although the living room 5 is not limited to this, it is preferable that the living room 5 be a space that is used by all residents, as it is a space that has direct access to the work space 6 and the children's space 7, which will be described later. In this embodiment, the other side of the staircase 2 is arranged on the lower floor with the toilet room 8 and the hallway 9.

[0029] As shown in Figures 2 and 3, the staircase 2 has at least a straight section 10 that does not turn back. That is, the staircase 2 includes straight staircases without turning back, buckle staircases that turn 90 degrees midway, and buckle staircases and spiral staircases that turn 180 degrees midway, but does not include stairs that do not have a straight section 10, such as a spiral staircase. Note that the staircase 2 is a buckle staircase or buckle staircase formed so that the upper end of the straight section 10 forms a landing 11. If the landing 11 faces an exterior wall 12, the under-stair space 4 formed below the straight section 10 and the landing 11 also faces the exterior wall 12. By providing a window in the exterior wall 12 facing the under-stair space 4, as shown in Figure 5, lighting L and ventilation W can be provided to the under-stair space 4, improving its comfort. Furthermore, the sloped ceiling 3 formed below the straight section 10 is preferably formed at a height of at least 600 mm to 1,800 mm above the floor 13 of the lower floor. In this embodiment, the staircase 2 forms a straight section 10 that does not turn back from the floor surface 13 of the lower floor to the 11th step, and the 11th step forms a landing 11, and a two-step turning section 15 is formed, making it a turning staircase that reaches the floor surface of the upper floor. In this embodiment, the side of the staircase 2 opposite the straight section 10 of the landing 11 faces an exterior wall 12.

[0030] As shown in Figure 1, the staircase 2 of this embodiment is 1 m long in the width direction, and the combined length of the straight section 10 and landing 11 is 3 m in the horizontal direction. If the width of the staircase 2 and the combined length of the straight section 10 and landing 11 are formed as a multiple of the modular unit in the design of the building, it will be easy to design and propose products. In particular, in this embodiment, the widths of the toilet room 8 and hallway 9 provided adjacent to the staircase 2 are also formed as modular units, making them easy to incorporate into the design of the building as a whole, and the under-stair structure 1 of this embodiment can be commercialized as a set plan with the toilet room 8 and hallway 9.

[0031] As shown in Figures 2 and 3 , a vertical wall 14 is formed below the fourth step of the straight section 10 of the staircase 2, rising vertically from the floor 13 of the lower floor. The vertical wall 14 rises to a height approximately equal to the third step of the staircase 2, and a sloped ceiling 3 is formed from the top of the vertical wall 14 upward in the direction of the slope of the staircase 2. The height of the top of the vertical wall 14 is, for example, 600 mm. The sloped ceiling 3 extends from the top of the vertical wall 14 to near the bottom of the risers that rise from the tenth to eleventh steps of the staircase 2. The top of the sloped ceiling 3 is approximately the height of the ninth step of the staircase 2. A horizontal ceiling 16 is formed between the top of the sloped ceiling 3 and the exterior wall 12. The horizontal ceiling 16 is located below the landing 11, which is the eleventh step of the staircase 2, and is formed at a height lower than the ceiling of the adjacent living room 5, for example, 1800 mm above the floor 13. The sloped ceiling 3 is formed in a height range of, for example, 600 mm to 1800 mm. The height dimensions of the sloped ceiling 3 and the horizontal ceiling 16 are not limited to these, and it is sufficient if they are tall enough to accommodate the children's space 7 and work space 6, which will be described later.

[0032] In this embodiment, the space between the vertical wall surface 14 and the exterior wall 12 and below the sloped ceiling 3 and horizontal ceiling 16 is the under-stairs space 4. The under-stairs space 4 is formed below the sloped ceiling 3 and has a waist wall 17 rising from the floor surface 13 of the lower floor. The waist wall 17 separates the under-stairs space 4 into two spaces: the space located on the lower side of the sloped ceiling 3 is the children's space 7, and the space located on the higher side of the sloped ceiling 3 is the work space 6. A second partition wall 18 is formed at the boundary between the under-stairs space 4 and the toilet room 8 and the corridor 9, completely closing it off.

[0033] The waist wall 17 is formed to a height of, for example, 900 mm from the floor surface 13, and a transparent plate 19 is erected on the waist wall 17. The transparent plate 19 is formed so that its upper end is in contact with the sloped ceiling 3. The transparent plate 19 is formed of glass or transparent resin, and may be provided with, for example, a window-shaped frame. The transparent plate 19 is formed to a height of, for example, 500 mm from the upper end of the waist wall 17.

[0034] As shown in Figure 2, the children's space 7 is a space surrounded by the floor 13 of the lower floor, the sloped ceiling 3, the waist wall 17, the transparent panel 19, and the vertical wall 14 formed on the opposite side of the waist wall 17. As shown in Figures 1 and 4, the children's space 7 is formed with an open boundary with the adjacent living room 5. In addition, the children's space 7 is formed with a second partition wall 18 closing the boundaries with the adjacent corridor 9 and toilet room 8. The upper edge of the doorway 20 formed at the open boundary between the children's space 7 and the living room 5 is formed in a mountain shape with a first sloped portion 21 that follows the sloped ceiling 3 and a second sloped portion 22 that is inversely sloped to the first sloped portion 21, and both side edges are formed along the vertical wall 14 and the waist wall 17, forming a shape similar to the gable of a house.

[0035] As shown in Figures 2 and 3, the sloped ceiling 3 in the children's space 7 is provided with a recessed downlight 23 that is embedded in the sloped ceiling 3. By recessing the downlight 23 in the ceiling, the lighting fixture does not protrude, thereby reducing the risk of injury or damage. Although not shown, the recessed downlight 23 may have an LED light source with an adjustable angle. Although not shown, the recessed downlight 23 may have a filter cover in front of the light source that diffuses light. It is preferable that the light be diffused widely throughout the children's space 7.

[0036] The children's space 7 has a low ceiling and a narrow floor surface 13, for example, a square with each side of about 900 mm, and the living room 5 side is open, providing a moderate sense of openness and a sense of seclusion at the same time, making the children feel comfortable.

[0037] As shown in Figures 1 and 2 , the work space 6 is formed between the floor 13 of the lower floor and the ceiling. The ceiling is formed by the sloped ceiling 3 continuing from the children's space 7 and the horizontal ceiling 16 below the landing 11. The work space 6 is separated by a waist wall 17, a transparent panel 19, and an exterior wall 12 formed on the opposite side of the waist wall 17. The boundary with the living room 5 is closed by a first partition wall 24, and the boundary with the toilet room 8 is closed by a second partition wall 18, forming an enclosed space. As shown in Figures 3 and 4 , the first partition wall 24 is provided with a door 25 that serves as an entrance / exit 20 to the living room 5. The door 25 is, for example, a hinged door with rectangular openings at the top and bottom. Transparent glass plates are fitted into each rectangular opening to form transparent portions 26. Although the work space 6 is closed by the first partition wall 24, the transparent portions 26 formed in the door 25 allow the space to be open to the living room 5 without feeling oppressive.

[0038] As shown in FIG. 2 , the work space 6 is formed by a horizontal desk top 27 protruding from the waist wall 17. The desk top 27 is formed at a height of 700 mm from the floor surface 13, and the protrusion length of the desk top 27 toward the work space 6 is, for example, 500 mm. A stand lamp 28 capable of diffusing light is disposed on top of the desk top 27 to illuminate the work space 6. Note that lighting fixtures may also be provided on the ceiling of the work space 6. Although not shown, outlets are formed in appropriate positions in the work space 6 to supply electricity to the stand lamp 28, laptop computers, tablet devices, etc.

[0039] Chairs 29 are arranged in work space 6 so that people can sit facing desk top 27. As described above, when the height of desk top 27 is 700 mm and the height of waist wall 17 is 900 mm, the upper part of waist wall 17 protrudes 200 mm above desk top 27, and transparent plate 19 is arranged above it. When a person sits in chair 29 facing desk top 27, they can see child space 7 through transparent plate 19. Therefore, they can keep an eye on their children in child space 7 while doing desk work or holding a remote conference in work space 6.

[0040] When a user sits on a chair 29 in the work space 6, an exterior wall 12 is formed behind the user. The exterior wall 12 has a high window 30 formed along the horizontal ceiling 16. The high window 30 is formed and folded across the entire width of the work space 6, and the height of the high window 30 is, for example, 300 mm. The provision of the high window 30 in the work space 6 allows light L to be introduced from outdoors, as shown in FIG. 5 . Furthermore, since the high window 30 is along the horizontal ceiling 16, the light L introduced from outdoors can be unobstructed and enter the children's space 7. For example, if the sloped ceiling 3 is a color that easily reflects light, such as white, the light can be reflected by the sloped ceiling 3, allowing more light to enter the children's space 7. The high window 30 may be a fixed window, but it is preferable that it be openable. If it is openable, it can allow outside air W to enter the work space 6. In this embodiment, the high window 30 is a sliding window.

[0041] A built-in storage shelf 31 is provided below the high window 30 along the exterior wall 12. The built-in storage shelf 31 can be used, for example, as a space for storing documents and equipment necessary for desk work, and by storing various books therein, the work space 6 can also function as a home library.

[0042] The boundary between the work space 6 and the children's space 7 is closed by a waist wall 17 and a transparent panel 19, the boundary between the work space 6 and the toilet room 8 is closed by a second partition wall 18, and the boundary between the work space 6 and the living room 5 is closed by a first partition wall 24, so that during remote meetings or desk work, sounds of other residents' daily lives or the sounds of children playing are less likely to enter the work space 6 and interfere with working from home.

[0043] 2 and 6, in this embodiment, glass wool sound-insulating material 32 is arranged in the space above the sloped ceiling 3, the space above the horizontal ceiling 16, and inside the second partition wall 18, respectively, to provide soundproofing. By providing soundproofing to the walls and ceilings separating the work space 6 and the children's space 7 in this way, the work space 6 can be made a quieter space where it is easier to work. Note that the structure for enhancing the soundproofing of the sloped ceiling 3, horizontal ceiling 16, and second partition wall 18 is not limited to the glass wool sound-insulating material 32, and may be, for example, shock-absorbing dampers or other sound-absorbing and sound-insulating materials 32.

[0044] In this embodiment, the staircase 2 on which the under-stair structure 1 is formed is disposed adjacent to the outside of a living room or other dwelling space 5, with the first partition wall 24 sandwiched between them, but this is not limited to this. The staircase 2 may be disposed on the living room 5 side of the partition wall 33 and disposed adjacent to the living room 5 on the inside of the living room 5, like a so-called living room staircase, as shown in Figures 7 and 8. By forming the under-staircase structure 1 on the inside of the living room 5 in this way, the straight section 10 and landing 11 of the staircase 2 face the living room without a partition wall, and these straight section 10 and landing 11, together with the children's space 7 and work space 6, can be incorporated into building designs and floor plan proposals as set components facing the living room.

[0045] It goes without saying that the embodiments of the present invention are not limited to the above-described embodiments, and can be modified as appropriate without departing from the scope of the concept of the present invention.

[0046] <First Invention> The first invention of the present application is an under-stair structure formed under a staircase that has at least a straight section that does not turn back, is adjacent to a living room, and connects a lower floor and an upper floor, the structure comprising a sloped ceiling formed below the straight section, and an under-stair space formed under the stairs that includes at least the underside of the sloped ceiling, the under-stair space being separated into two spaces by a waist wall that is positioned below the sloped ceiling and rises from the floor surface of the lower floor, the two spaces being a children's space that is positioned on the lower side of the sloped ceiling, and a work space that is positioned on the higher side of the sloped ceiling and has a desk top protruding from the waist wall.

[0047] According to this design, the stairs have at least a straight section that does not turn back, and the space under the stairs, including the sloped ceiling formed below the straight section, is separated into two spaces by a waist wall. The two spaces are a children's space and a work space with a desk top protruding from the waist wall. When working from home or other tasks facing the desk top from the work space side, the children's space can be seen on the other side across the waist wall, allowing desk work while keeping an eye on the child. Furthermore, since the children's space is located on the low side of the sloped ceiling and the work space is located on the high side of the sloped ceiling, the children's space can be a small space with a low ceiling that children will want to hide in, and by using the side with a higher ceiling than the children's space as the work space, a space with two functions can be created under the stairs, thereby further improving space efficiency.

[0048] <Second Invention> The second invention of the present application is the under-staircase structure of the first invention, in which a transparent plate is erected on the waist wall, and the upper end of the transparent plate is connected to the sloped ceiling.

[0049] This means that a waist wall and a transparent panel extending from the top of the waist wall to the sloped ceiling are installed between the children's space and the work space, so that sounds made by the children can be blocked to some extent while keeping an eye on them from the work space, and it is possible to prevent the microphone from picking up sounds made by the children, for example, during remote meetings.

[0050] <Third Invention> The third invention of the present application is an under-stairs structure of the first or second invention, in which the children's space is open toward the living room, a first partition wall with fittings installed is provided between the work space and the living room, and the entire under-stairs space is closed off by a second partition wall on the side opposite the living room.

[0051] As a result, the children's space is open to the living room, so it is possible to keep an eye on the children whether they are in the work space or the living room.In addition, a first partition wall with fittings installed is installed between the work space and the living room, and the opposite side from the living room is closed off by a second partition wall, so it is difficult for the daily sounds of other residents to enter the work space, allowing desk work and remote meetings to be carried out in a quieter environment.

[0052] <Fourth Invention> A fourth invention of the present application is the under-stair structure of any one of the first to third inventions, wherein the fixture has a transparent portion.

[0053] According to this, since the fixtures installed on the first partition wall have transparent parts, the work space can be prevented from feeling closed in, making it a more comfortable space.

[0054] <Fifth Invention> The fifth invention of the present application is an under-stair structure of any of the first to fourth inventions, wherein the work space is formed facing an exterior wall on the side opposite the children's space, and a high window is formed along the exterior wall.

[0055] According to this, the opposite side of the work space from the children's space faces the exterior wall, and high windows are formed along the exterior wall, allowing light to be drawn into the work space during the day, and since a transparent panel is installed at the boundary between the work space and the children's space, light can also be drawn into the children's space from the high windows. In particular, the high windows allow light to reach further outdoors, allowing more light to be drawn into the children's space.

[0056] <Sixth Invention> A sixth invention of the present application is the under-stair structure of any one of the first to fifth inventions, wherein the high window is openable and closable.

[0057] This allows the high window to be opened and closed, allowing ventilation of the work space.

[0058] <Seventh Invention> The seventh invention of the present application is the under-staircase structure of any one of the first to sixth inventions, wherein a built-in shelf storage is formed below the high window along the exterior wall.

[0059] According to this, built-in storage shelves are formed under the high window, so documents, books, laptops, etc. necessary for desk work can be stored. Because the window is high, storage can be done without blocking the window.

[0060] <8th Invention> The 8th invention of the present application is an under-stair structure according to any one of the 1st to 7th inventions, wherein the children's space is a space surrounded by the floor of the lower floor, the sloped ceiling, the waist wall and the transparent panel, and a vertical wall surface provided on the opposite side of the waist wall, and the open boundary between the children's space and the living room is formed in a mountain shape with its upper edge being a first sloped section that follows the sloped ceiling and a second sloped section that has an opposite slope to the first sloped section.

[0061] According to this, the upper edge of the open boundary between the children's space and the living room is formed in a mountain shape with a first sloped section that follows the sloped ceiling and a second sloped section that is the opposite slope to the first sloped section, so the entrance to the children's space from the living room can be designed like the gable of a house, making it easy for children to enter. Furthermore, because the second sloped section is formed, the upper edge of the boundary is mountain-shaped rather than sloped, so the inner periphery can be made into an obtuse-angled opening, which makes it easier to work on wallpapering and other construction tasks during construction.

[0062] <Ninth Invention> The ninth invention of the present application is an under-stair structure according to any one of the first to eighth inventions, wherein the space above the sloped ceiling or the second partition wall is provided with a soundproof structure.

[0063] According to this, the attic space above the sloped ceiling and the second partition wall are constructed with soundproofing properties, which can block out sounds from going up and down the stairs and everyday life on the other side of the second partition wall, thereby improving the soundproofing of the work space.

[0064] The under-stair structure according to the present invention is suitable, for example, for a home that allows both child-rearing at home and working from home.

[0065] DESCRIPTION OF SYMBOLS 1 Under-stair structure 2 Stairs 3 Sloped ceiling 4 Under-stair space 5 Living room 6 Work space 7 Children's space 10 Straight section 12 Exterior wall 17 Waist wall 18 Second partition wall 19 Transparent panel 24 First partition wall 25 Door and window 26 Transparent section 27 Desk top 31 Built-in shelf storage 32 Soundproofing material

Claims

1. A staircase structure formed under a staircase that has at least a straight section that does not turn back, is adjacent to a living room, and connects a lower floor and an upper floor, comprising: a sloped ceiling formed below the straight section; and an under-stair space formed under the stairs that includes at least the underside of the sloped ceiling, wherein the under-stair space is separated into two spaces by a waist-high wall that is located below the sloped ceiling and rises from the floor surface of the lower floor, and the two spaces are a child's space that is located on the lower side of the sloped ceiling, and a work space that is located on the higher side of the sloped ceiling and has a desk top protruding from the waist-high wall.

2. A staircase structure as described in claim 1, wherein a transparent plate is erected on the waist wall, and the upper end of the transparent plate is connected to the sloped ceiling.

3. The under-stairs structure as described in claim 2, wherein the children's space is open toward the living room, a first partition wall with fittings installed is provided between the work space and the living room, and the entire under-stairs space is closed off by a second partition wall on the side opposite the living room.

4. The staircase under structure according to claim 3, wherein the fixture has a transparent portion.

5. The under-staircase structure according to claim 1, wherein the work space faces an exterior wall on the side opposite the children's space, and a high window is formed along the exterior wall.

6. The under-staircase structure according to claim 5, wherein the high window can be opened and closed.

7. A staircase under structure as described in claim 5, in which a built-in shelf storage is formed below the high window along the exterior wall.

8. The under-stair structure described in claim 3, wherein the children's space is a space surrounded by the floor of the lower floor, the sloped ceiling, the waist-high wall and the transparent panel, and a vertical wall surface provided opposite the waist-high wall, and the open boundary between the children's space and the living room is formed in a mountain shape with an upper edge of a first sloped section that follows the sloped ceiling and a second sloped section that has an opposite slope to the first sloped section.

9. The under-stair structure according to claim 3, wherein the space above the sloped ceiling or the second partition wall is provided with a soundproof structure.

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