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

TECHNICAL PROBLEMS

[0006] Meanwhile, in recent years, with increasing opportunities to work from home, a residence is also required to have a space suitable for home working. Moreover, in a case in which a child-rearing generation works from home, they demand to achieve both of working from home and watching over their children.

[0007] In this respect, an object of the present invention is to provide an under-stairs structure which enables to efficiently utilize a space, and to achieve both of working from home and watching over a child. SOLUTIONS TO PROBLEMS

[0008] A first invention of the present application relates to an under-stairs structure formed under stairs, the stairs including at least a linear part without a turn, and connecting a lower floor and an upper floor to be adjacent to a habitable room. The under-stairs structure includes: a sloped ceiling formed at an underside of the linear part; and an under-stairs space formed under the stairs to include at least under the sloped ceiling, wherein the under-stairs space is divided into two spaces by a wainscot placed under the sloped ceiling and standing from a floor surface of the lower floor, and the two spaces are a child space positioned at a side where the sloped ceiling is lower, and a workspace positioned at a side where the sloped ceiling is higher and including a desk top board projecting from the wainscot.

[0009] A second invention of the present application relates to the under-stairs structure according to the first invention, wherein a transparent plate is provided to stand on the wainscot, and an upper end of the transparent plate continues to the sloped ceiling.

[0010] A third invention of the present application relates to the under-stairs structure according to the second invention, wherein the child space is open toward the habitable room, and a first partition wall with joinery installed thereto is provided between the workspace and the habitable room, and the under-stairs space is entirely closed at a side opposite to the habitable room by a second partition wall.

[0011] A fourth invention of the present application relates to the under-stairs structure according to the third invention, wherein the joinery includes a transparent part.

[0012] Afifth invention of the present application relates to the under-stairs structure according to the first invention, wherein the workspace is formed to face an external wall at a side opposite to the child space, and a clerestory is formed along the external wall.

[0013] A sixth invention of the present application relates to the under-stairs structure according to the fifth invention, wherein the clerestory is openable and closable.

[0014] A seventh invention of the present application relates to the under-stairs structure according to the fifth invention, wherein a custom-made shelf storage is formed along the external wall below the clerestory.

[0015] An eighth invention of the present application relates to the under-stairs structure according to the third invention, wherein the child space is a space surrounded by the floor surface of the lower floor, the sloped ceiling, the wainscot and the transparent plate, and a vertical wall surface provided at an opposite side to the wainscot, and an open boundary between the child space and the habitable room has an upper edge formed in a mountain-like shape by a first slope part along the sloped ceiling, and a second slope part having an inverse slope of the first slope part.

[0016] A ninth invention of the present application relates to the under-stairs structure according to the third invention, wherein a ceiling backside of the sloped ceiling or the second partition wall includes a structure having sound proofing properties. ADVANTAGEOUS EFFECTS OF INVENTION

[0017] According to the first invention of the present application, the stairs include at least the linear part without a turn, and the under-stairs space including the sloped ceiling formed at the underside of the linear part is divided into the two spaces by the wainscot, and the two spaces are the child space and the workspace including the desk top board projecting from the wainscot. Therefore, in a case of work (for example, working from home) while facing toward the desk top board from the workspace side, the child space can be seen on the opposite side with the wainscot interposed therebetween, and thereby deskwork can be performed while watching over a child. Moreover, the child space is positioned at the side where the sloped ceiling is lower, and the workspace is positioned at the side where the sloped ceiling is higher. Therefore, the child space can be a small space which has the low ceiling and encourages a child to seclude his / herself therein, and the workspace is arranged at the side where the ceiling is higher than that of the child space. Thus, the spaces having two roles can be provided under the stairs, and space efficiency can further be improved.

[0018] According to the second invention of the present application, the wainscot and the transparent plate continuing from the top of the wainscot to the sloped ceiling are provided between the child space and the workspace. Therefore, while watching over a child from the workspace, a sound made by the child can be blocked to some extent, thereby, for example, suppressing a microphone picking up the sound made by the child in a case of a video conference or the like.

[0019] According to the third invention of the present application, the child space is open toward the habitable room, and thereby watching over a child is possible both from the workspace and from the habitable room. Moreover, the first partition wall with the joinery installed thereto is provided between the workspace and the habitable room, and the opposite side to the habitable room is closed by the second partition wall. Therefore, daily life noise caused by another resident is less likely to be heard in the workspace, and deskwork and a video conference can be performed in a quieter environment.

[0020] According to the fourth invention of the present application, the joinery installed to the first partition wall includes the transparent part, which can suppress the workspace being a stifling space, and make the workspace more comfortable.

[0021] According to the fifth invention of the present application, the workspace is formed to face the external wall at the side opposite to the child space, and the clerestory is formed along the external wall, and thereby light can be let into the workspace during the daytime. Moreover, since the boundary between the child space and the workspace includes the transparent plate, light can also be let into the child space from the clerestory. Particularly, since a window provided is the clerestory, light can reach further at the outdoor side, and much light can be let into the child space.

[0022] According to the sixth invention of the present application, the clerestory is openable and closable, and thereby the workspace can be ventilated.

[0023] According to the seventh invention of the present application, the custom-made shelf storage is formed below the clerestory, and thereby a document, a book, a laptop, or the like necessary for deskwork can be stored. Since the window is the clerestory, storage is possible without blocking the window.

[0024] According to the eighth invention of the present application, the open boundary between the child space and the habitable room has the upper edge formed in a mountain-like shape by the first slope part along the sloped ceiling, and the second slope part having the inverse slope of the first slope part. Therefore, an entrance from the habitable room to the child space can be designed like a gable surface of a house, which can be a design to encourage a child to enter therein. Since the second slope part is formed, the upper edge of the boundary is not in a single pitched shape, but in a mountain-like shape. Therefore, an inner circumference of the opening has obtuse angles, which can make work such as wallpapering during construction easy.

[0025] According to the ninth invention of the present application, the ceiling backside of the sloped ceiling or the second partition wall has the structure with sound proofing properties. Therefore, daily life noise caused by going up and down the stairs or caused on the opposite side of the second partition wall is insulated, and sound insulating properties of the workspace can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Fig.1 is a partially abbreviated horizontal sectional view illustrating a configuration of an under-stairs structure. Fig. 2 is a partially abbreviated vertical sectional view illustrating configurations of stairs and an under-stairs space. Fig. 3 is a view adding a description of a joinery to the partially abbreviated vertical sectional view in Fig. 2 illustrating a relationship between a home office and the joinery. Fig. 4 is a view illustrating a first partition wall and an entrance / exit formed at a boundary between a child space and a habitable room viewed from a habitable room side. Fig. 5 is a view Illustrating lighting and ventilation through a clerestory. Fig. 6 is an enlarged sectional view illustrating a structure in which a sound insulator is provided inside of a second partition wall. Fig. 7 is a partially abbreviated horizontal sectional view illustrating a modification of an embodiment in which the stairs is placed at an inside of a habitable room as living stairs. Fig. 8: is a perspective view illustrating a modification of an example in which the stairs is placed at an inside of a habitable room as living stairs. DESCRIPTION OF EMBODIMENTS

[0027] Hereinafter, an embodiment of an under-stairs structure of the present invention is described with reference to each drawing. An under-stairs structure 1 of this embodiment is an under-stairs structure 1 provided to a building such as a detached house or a duplex-type apartment building with two or more stories. The under-stairs structure 1 includes stairs 2 connecting a lower floor and an upper floor, a sloped ceiling 3 formed at an underside of the stairs 2, and an under-stairs space 4 formed under the stairs to include under the sloped ceiling 3.

[0028] As illustrated in Fig. 1, the stairs 2 are placed in such a manner that one side wall thereof at the lower floor is adjacent to a habitable room 5. Note that in this embodiment the habitable room 5 is a space including a living room, a dining room, or both of them. Although the habitable room 5 is not limited to this, since the habitable room 5 is a space directly accessible from a workspace 6 and a child space 7 which will be described later, the habitable room 5 is preferably a space utilized by all the residents. Moreover, in this embodiment, the stairs 2 are placed in such a manner that the other side wall thereof at the lower floor is adjacent to a toilet room 8 and a hallway 9.

[0029] As illustrated in Figs. 2 and 3, the stairs 2 include at least a linear part 10 without a turn. That is, the stairs 2 include straight stairs without a turned part, L-shaped stairs with a bend at 90 degrees in an intermediate portion thereof, or U-shaped stairs or winder stairs with a turn at 180 degrees at an intermediate portion thereof, whereas the stairs 2 do not include stairs without the linear part 10, such as spiral stairs, for example. Note that the stairs 2 are U-shaped stairs or L-shaped stairs formed in such a manner that an upper end of the linear part 10 is a landing 11. In a case in which the landing 11 is formed adjacently to an external wall 12, the under-stairs space 4 formed under the linear part 10 and the landing 11 is also adjacent to the external wall 12. By providing a window to the external wall 12 adjacent to the under-stairs space 4, as illustrated in Fig. 5, lighting L and ventilation W of the under-stairs space 4 are possible, and comfortability of the under-stairs space 4 can be improved. The sloped ceiling 3 formed at the underside of the linear part 10 is preferably formed at a height within at least a range from 600 mm to 1800 mm from a floor surface 13 of the lower floor. In this embodiment, the stairs 2 are U-shaped stairs in which the linear part 10 without a turn is formed from the floor surface 13 of the lower floor to an eleventh step, the eleventh step forms the landing 11, and a turned part 15 is formed by two steps to reach a floor surface of the upper floor. In the stairs 2 of this embodiment, the landing 11 faces the external wall 12 at a side opposite to the linear part 10.

[0030] Note that, as illustrated in Fig. 1, the stairs 2 of this embodiment are formed to have a length of 1 m in a width direction, and a length of 3 m in a horizontal direction when combining lengths of the linear part 10 and the landing 11. When the width of the stairs 2, and the total length of the linear part 10 and the landing 11 are each formed to be a multiple of a module unit in designing a building, designing and product proposal can be easy. Particularly, in this embodiment, widths of the toilet room 8 and the hallway 9 provided adjacently to the stairs 2 are also formed in a module unit, thus being easily incorporated in the building design as a whole. Therefore, the under-stairs structure 1 of this embodiment as well as the toilet room 8 and the hall way 9 can be commercialized as a set plan.

[0031] As illustrated in Figs. 2 and 3, under a fourth step of the linear part 10 of the stairs 2, a vertical wall surface 14 vertically standing from the floor surface 13 of the lower floor is formed. The vertical wall surface 14 stands to reach a height corresponding to a third step of the stairs 2. The sloped ceiling 3 is formed from an upper end of the vertical wall surface 14 upwardly in a sloped direction of the stairs 2. The height at the upper end of the vertical wall surface 14 is, for example, 600 mm. The sloped ceiling 3 is formed from the upper end of the vertical wall surface 14 to near an underside of a riser to go up from a tenth step to the eleventh step of the stairs 2. A height at an upper end of the sloped ceiling 3 is a height corresponding to a ninth step of the stairs 2. A horizontal ceiling 16 is formed from the upper end of the slop ceiling 3 to the external wall 12. The horizontal ceiling 16 is placed at an underside of the landing 11 which is the eleventh step of the stairs 2, and is formed at a height (for example, 1800 mm from the floor surface 13) lower than a ceiling of the adjacent habitable room 5. The sloped ceiling 3 is formed at a height within a range from 600 mm to 1800, for example. The height dimensions of the sloped ceiling 3 and the horizontal ceiling 16 are not limited to those, but may be any heights which allow arrangement of the child space 7 and the workspace 6 described later.

[0032] In this embodiment, a space between the vertical wall surface 14 and the external wall 12, and under the sloped ceiling 3 and the horizontal ceiling 16 is the under-stairs space 4. The under-stairs space 4 is formed under the sloped ceiling 3, and includes a wainscot 17 standing from the floor surface 13 of the lower floor. The wainscot 17 divides the under-stairs space 4 into two spaces, where a space positioned at a side where the sloped ceiling 3 is lower is the child space 7, and a space positioned at a side where the sloped ceiling 3 is higher is the workspace 6. A second partition wall 18 is formed as a boundary between the under-stairs space 4, and the toilet room 8 and the hallway 9, and thereby the boundary is fully closed.

[0033] The wainscot 17 is formed to have a height of, for example, 900 mm from the floor surface 13, and a transparent plate 19 is provided to stand on the wainscot 17. The transparent plate 19 is formed in such a manner that an upper end thereof contacts the sloped ceiling 3. The transparent plate 19 is made of glass or transparent resin, and for example, provided with a window-shaped frame. The transparent plate 19 is formed from the upper end of the wainscot 17 to a height of 500 mm, for example.

[0034] As illustrated in Fig. 2, the child space 7 is a space surrounded by the floor surface 13 of the lower floor, the sloped ceiling 3, the wainscot 17 and the transparent plate 19, and the vertical wall surface 14 formed at the opposite side to the wainscot 17. As illustrated in Figs. 1 and 4, the child space 7 is formed in such a manner that a boundary with respect to the adjacent habitable room 5 is open. Moreover, the child space 7 is formed in such a manner that a boundary with respect to the hallway 9 and the toilet room 8 which are adjacent to the child space 7 is closed by the second partition wall 18. An entrance / exit 20 is formed at the open boundary between the child space 7 and the habitable room 5 to have a shape like a gable surface of a residence. An upper edge of the entrance / exit 20 is formed to have a mountain-like shape by a first slope part 21 along the sloped ceiling 3, and a second slope part 22 having an inverse slope of the first slope part 21, and both side edges of the entrance / exit 20 are formed along the vertical wall surface 14 and the wainscot 17.

[0035] As illustrated in Figs. 2 and 3, the sloped ceiling 3 of the child space 7 is provided with a ceiling embedded-type downlight 23 which is embedded in the sloped ceiling 3. The lightning equipment of the ceiling embedded type does not protrude, and thereby injury and damage can be suppressed. Moreover, although not illustrated, the ceiling embedded-type downlight 23 may be adjustable of an angle of an LED light source, for example. Moreover, although not illustrated, the ceiling embedded-type downlight 23 may be provided with a filter cover which diffuses light just before a light source. Light is preferably diffused widely entirely across the child space 7.

[0036] The child space 7 is a small space in which the ceiling is low, and the floor surface 13 has, for example, a square shape with a 900 mm side. A child can feel comfortability by achieving both of moderately open feeling by the child space 7 being open at the habitable room 5 side, and comfortably secluded feeling.

[0037] As illustrated in Figs. 1 and 2, the workspace 6 is formed between the floor surface 13 at the lower floor and a ceiling surface. The ceiling surface is formed by the sloped ceiling 3 which continues from the child space 7, and the horizontal ceiling 16 at the underside of the landing 11. The workspace 6 is partitioned by the wainscot 17 and the transparent plate 19, and the external wall 12 formed at the opposite side to the wainscot 17. The workspace 6 is a surrounded space in which a boundary with respect to the habitable room 5 is closed by a first partition wall 24, and a boundary with respect to the toilet room 8 is closed by the second partition wall 18. As illustrated in Figs. 3 and 4, the first partition wall 24 is provided with joinery 25 installed thereto. The joinery 25 is the entrance / exit 20 to or from the habitable room 5. The joinery 25 is, for example, a hinged door, and is provided with rectangular openings at upper and lower portions thereof. Each rectangular opening includes a transparent glass plate embedded therein to form a transparent part 26. In this manner, by forming the transparent part 26 in the joinery 25, the workspace 6 which is closed by the first partition wall 24 can still make the space open at the habitable room 5 side with small oppressiveness.

[0038] As illustrated in Fig. 2, in the workspace 6, a horizontal desk top board 27 is formed to project from the wainscot 17. The desk top board 27 is formed at a height of 700 mm from the floor surface 13, and a projecting length of the desk top board 27 to the workspace 6 side is, for example, 500 mm. A stand light 28 which can diffuse light is placed on the desk top board 27 to light up the workspace 6. Note that the ceiling of the workspace 6 may also be provided with lightning equipment. Although not illustrated, an outlet can be formed at an appropriate position of the workspace 6 to supply power to the stand light 28, a laptop, a tablet terminal, or the like.

[0039] A chair 29 is placed in the workspace 6 in such a manner as to allow seating facing toward the desk top board 27. As described above, in the case in which the desk top board 27 is provided at the height of 700 mm, and the wainscot 17 has the height of 900 mm, an upper portion of the wainscot 17 projects upward by 200 mm from the desk top board 27, and the transparent plate 19 is placed on the projecting portion. When a person is seated in the chair 29 facing toward the desk top board 27, the seated person can visually recognize the child space 7 through the transparent plate 19. Therefore, the person can watch over a child in the child space 7 during deskwork or a video conference in the workspace 6.

[0040] When a person is seated in the chair 29 in the workspace 6, the external wall 12 is formed at the back side. The external wall 12 includes a clerestory 30 formed along the horizontal ceiling 16. The clerestory 30 is formed across the entire length of the workspace 6 in the width direction, and a length of the clerestory 30 in the height direction is, for example, 300 mm. As illustrated in Fig. 5, by the clerestory 30 being provided to the workspace 6, light L can be let in from outdoors. Moreover, by the clerestory 30 being provided along the horizontal ceiling 16, the light L let in from outdoors can also enter the child space 7 without being blocked. Note that, for example, when the sloped ceiling 3 has a color such as white which easily reflects light, the sloped ceiling 3 reflects light to let much light to enter the child space 7. Although the clerestory 30 may be a fixed window, it is more preferably openable and closable. The openable and closable clerestory 30 can let outside air W into the workspace 6. In this embodiment, the clerestory 30 is a double sliding window.

[0041] A custom-made shelf storage 31 is provided along the external wall 12 below the clerestory 30. The custom-made storage shelf storage 31 may be utilized, for example, as a space for storing a document or equipment necessary for deskwork, or may store various books so that the workspace 6 can also function as a home library.

[0042] In the workspace 6, the boundary with respect to the child space 7 is closed by the wainscot 17 and the transparent plate 19, the boundary with respect to the toilet 8 is closed by the second partition wall 18, and the boundary with respect to the habitable room 5 is closed by the first partition wall 24. Therefore, daily life noise caused by another resident, voices of a child playing, and the like are less likely to be heard in the workspace 6 during a video conference or deskwork, and less likely to disturb working from home.

[0043] In this embodiment, as illustrated in Figs. 2 and 6, a sound insulator 32 made of glass wool is disposed at each of a ceiling backside of the sloped ceiling 3, a ceiling backside of the horizontal ceiling 16, and an inside of the second partition wall 18 to provide sound proofing properties. In this manner, by the partition wall between the workspace 6 and the child space 7, and the ceiling having sound proofing properties, the workspace 6 can be made a quieter and easy-to-work space. Note that the structure which improves sound proofing properties of the sloped ceiling 3, the horizontal ceiling 16, and the second partition wall 18 is not limited to the glass wool sound insulator 32, but may be, for example, a dumper which absorbs impact, or another sound absorbing material or sound insulator 32.

[0044] Note that, in this embodiment, the stairs 2 formed with the under-stairs structure 1 is, but not limited to, placed at an outside of and adjacent to the habitable room 5 (for example, a living room) with the first partition wall 24 interposed therebetween. As illustrated in Figs. 7 and 8, the stairs 2 may be, like what is called living stairs, placed on a habitable room 5 side of a partition wall 33, and placed at an inside of and adjacent to the habitable room 5. In this manner, by the under-stairs structure 1 being formed at the inside of the habitable room 5, the linear part 10 and the landing 11 of the stairs 2 are placed adjacent to the living room without a partition wall interposed therebetween. Therefore, the linear part 10 and the landing 11 can be incorporated, together with the child space 7 and the workspace 6, as a set component adjacent to the living room in designing and arrangement proposal of a building.

[0045] Needless to say, the embodiment of the present invention is not limited to the embodiment described above, but can suitably be changed without departing from the spirit of the present invention. <First lnvention>

[0046] A first invention of the present application is an under-stairs structure formed under stairs. The stairs include at least a linear part without a turn, and connect a lower floor and an upper floor to be adjacent to a habitable room. The under-stairs structure includes a sloped ceiling formed at an underside of the linear part, and an under-stairs space formed under the stairs to include at least under the sloped ceiling. The under-stairs space is divided into two spaces by a wainscot placed under the sloped ceiling and standing from a floor surface of the lower floor. The two spaces are a child space positioned at a side where the sloped ceiling is lower, and a workspace positioned at a side where the sloped ceiling is higher and including a desk top board projecting from the wainscot.

[0047] According to this, the stairs include at least the linear part without a turn, and the under-stairs space including the sloped ceiling formed at the underside of the linear part is divided into the two spaces by the wainscot, and the two spaces are the child space and the workspace including the desk top board projecting from the wainscot. Therefore, in a case of work (for example, working from home) while facing toward the desk top board from the workspace side, the child space can be seen on the opposite side with the wainscot interposed therebetween, and thereby deskwork can be performed while watching over a child. Moreover, the child space is positioned at the side where the sloped ceiling is lower, and the workspace is positioned at the side where the sloped ceiling is higher. Therefore, the child space can be a small space which has the low ceiling and encourages a child to seclude his / herself therein, and the workspace is arranged at the side where the ceiling is higher than that of the child space. Thus, the spaces having two roles can be provided under the stairs, and space efficiency can further be improved. <Second lnvention>

[0048] A second invention of the present application is the under-stairs structure of the first embodiment, where a transparent plate is provided to stand on the wainscot, and an upper end of the transparent plate continues to the sloped ceiling.

[0049] According to this, the wainscot and the transparent plate continuing from the top of the wainscot to the sloped ceiling are provided between the child space and the workspace. Therefore, while watching over a child from the workspace, a sound made by the child can be blocked to some extent, thereby, for example, suppressing a microphone picking up the sound made by the child in a case of a video conference or the like. <Third lnvention>

[0050] A third invention of the present application is the under-stairs structure of the first invention or the second invention, where the child space is open toward the habitable room, and a first partition wall with joinery installed thereto is provided between the workspace and the habitable room. The under-stairs space is entirely closed at a side opposite to the habitable room by a second partition wall.

[0051] According to this, the child space is open toward the habitable room, and thereby watching over a child is possible both from the workspace and from the habitable room. Moreover, the first partition wall with the joinery installed thereto is provided between the workspace and the habitable room, and the opposite side to the habitable room is closed by the second partition wall. Therefore, daily life noise caused by another resident is less likely to be heard in the workspace, and deskwork and a video conference can be performed in a quieter environment. <Fourth lnvention>

[0052] Afourth invention of the present application is the under-stairs structure of any of the first invention to the third invention, where the joinery includes a transparent part.

[0053] According to this, the joinery installed to the first partition wall includes the transparent part, which can suppress the workspace being a stifling space, and make the workspace more comfortable. <Fifth lnvention>

[0054] A fifth invention of the present application is the under-stairs structure of any of the first invention to the fourth invention, where the workspace is formed to face an external wall at a side opposite to the child space, and a clerestory is formed along the external wall.

[0055] According to this, the workspace is formed to face the external wall at the side opposite to the child space, and the clerestory is formed along the external wall, and thereby light can be let into the workspace during the daytime. Moreover, since the boundary between the child space and the workspace includes the transparent plate, light can also be let into the child space from the clerestory. Particularly, since a window provided is the clerestory, light can reach further at the outdoor side, and much light can be let into the child space. <Sixth lnvention>

[0056] A sixth invention of the present application is the under-stairs structure of any of the first invention to the fifth invention, where the clerestory is openable and closable.

[0057] According to this, the clerestory is openable and closable, and thereby the workspace can be ventilated. <Seventh lnvention>

[0058] A seventh invention of the present application is the under-stairs structure of any of the first invention to the sixth invention, where a custom-made shelf storage is formed along the external wall below the clerestory.

[0059] According to this, the custom-made shelf storage is formed below the clerestory, and thereby a document, a book, a laptop, or the like necessary for deskwork can be stored. Since the window is the clerestory, storage is possible without blocking the window. <Eighth lnvention>

[0060] An eighth invention of the present application is the under-stairs structure of the first invention to the seventh invention, where the child space is a space surrounded by the floor surface of the lower floor, the sloped ceiling, the wainscot and the transparent plate, and a vertical wall surface provided at an opposite side to the wainscot. An open boundary between the child space and the habitable room has an upper edge formed in a mountain-like shape by a first slope part along the sloped ceiling, and a second slope part having an inverse slope of the first slope part.

[0061] According to this, the open boundary between the child space and the habitable room has the upper edge formed in a mountain-like shape by the first slope part along the sloped ceiling, and the second slope part having the inverse slope of the first slope part. Therefore, an entrance from the habitable room to the child space can be designed like a gable surface of a house, which can be a design to encourage a child to enter therein. Since the second slope part is formed, the upper edge of the boundary is not in a single pitched shape, but in a mountainlike shape. Therefore, an inner circumference of the opening has obtuse angles, which can make work such as wallpapering during construction easy. <Ninth lnvention>

[0062] A ninth invention of the present application is the under-stairs structure of any of the first invention to the eighth invention, where a ceiling backside of the sloped ceiling or the second partition wall includes a structure having sound proofing properties.

[0063] According to this, the ceiling backside of the sloped ceiling or the second partition wall has the structure with sound proofing properties. Therefore, daily life noise caused by going up and down the stairs or caused on the opposite side of the second partition wall is insulated, and sound insulating properties of the workspace can be improved. INDUSTRIAL APPLICABILITY

[0064] The under-stairs structure according to the present invention is suitable for a residence which enables to achieve both of child rearing of the residence and working from home, for example. DESCRIPTION OF REFERENCE SIGNS

[0065] 1 under-stairs structure 2 stairs 3 sloped ceiling 4 under-stairs space 5 habitable room 6 workspace 7 child space 10 linear part 12 external wall 17 wainscot 18 second partition wall 19 transparent plate 24 first partition wall 25 joinery 26 transparent part 27 desk top board 31 custom-made shelf storage 32 sound insulator

Claims

1. An under-stairs structure formed under stairs, the stairs including at least a linear part without a turn, and connecting a lower floor and an upper floor to be adjacent to a habitable room, the under-stairs structure comprising:a sloped ceiling formed at an underside of the linear part; and an under-stairs space formed under the stairs to include at least under the sloped ceiling, whereinthe under-stairs space is divided into two spaces by a wainscot placed under the sloped ceiling and standing from a floor surface of the lower floor, andthe two spaces are a child space positioned at a side where the sloped ceiling is lower, and a workspace positioned at a side where the sloped ceiling is higher and including a desk top board projecting from the wainscot.

2. The under-stairs structure according to Claim 1, wherein atransparent plate is provided to stand on the wainscot, andan upper end of the transparent plate continues to the sloped ceiling.

3. The under-stairs structure according to Claim 2, wherein thechild space is open toward the habitable room, and a first partition wall with joinery installed thereto is provided between the workspace andthe habitable room, andthe under-stairs space is entirely closed at a side opposite to the habitable room by a second partition wall.

4. The under-stairs structure according to Claim 3, wherein thejoinery includes a transparent part.

5. The under-stairs structure according to Claim 1, wherein the workspace is formed to face an external wall at a side opposite to the child space, anda clerestory is formed along the external wall.

6. The under-stairs structure according to Claim 5, wherein theclerestory is openable and closable.

7. The under-stairs structure according to Claim 5, wherein a custom-made shelf storage is formed along the external wall below the clerestory.

8. The under-stairs structure according to Claim 3, wherein the child space is a space surrounded by the floor surface of the lower floor, the sloped ceiling, the wainscot and the transparent plate, and a vertical wall surface provided at an opposite side to the wainscot, andan open boundary between the child space and the habitable room has an upper edge formed in a mountain-like shape by a firstslope part along the sloped ceiling, and a second slope part having an inverse slope of the first slope part.

9. The under-stairs structure according to Claim 3, wherein aceiling backside of the sloped ceiling or the second partition wall includes a structure having sound proofing properties.INTERNATIONAL SEARCH REPORT International application No. PCT / JP2024 / 005559A. CLASSIFICATION OF SUBJECT MATTER E04H / / «2(2006.0l)i; E04F 11 / 02(2006.01 )i FI: E04H1 / 02; E04F11 / 02 According to International Patent Classification (IPC) or to both national classification and IPC B. FIELDS SEARCHED Minimum documentation searched (classification system followed by classification symbols) E04H1 / 02: E04F11 / 02 Documentation searched other than minimum documentation to the extent that such documents are included in the fields searched Published examined utility model applications of Japan 1922-1996 Published unexamined utility model applications of Japan 1971-2024 Registered utility model specifications of Japan 1996-2024 Published registered utility model applications of Japan 1994-2024 Electronic data base consulted during the international search (name of data base and, where practicable, search terms used) C. DOCUMENTS CONSIDERED TO BE RELEVANT Category* Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No. A JP 2013-57172 A (SEKISUI HOUSE, LTD.) 28 March 2013 (2013-03-28) entire text, all drawings 1-9 A A JP 2013-174058 A (TOYOTA HOME K.K.) 05 September 2013 (2013-09-05) entire text, all drawings JP 2019-148100 A (SEKISUI HOUSE, LTD.) 05 September 2019 (2019-09-05) entire text, all drawings 1-9 1-9 A JP 2022-115422 A (SEKISUI HOUSE, LTD.) 09 August 2022 (2022-08-09) entire text, all drawings 1-9 | | Further documents are listed in the continuation of Box C. | Z | See patent family annex. * Special categories of cited documents: “T” later document published after the international filing date or priority “A" document defining the general state of the art which is not considered date and not in conflict with the application but cited to understand the to be of particular relevance principle or theory underlying the invention “D" document cited by the applicant in the international application “X” document of particular relevance; the claimed invention cannot be “E" earlier application orpatent but published on or after the international considered novel or cannot be considered to involve an inventive step filing date when the document is taken alone “L" document which may throw doubts on priority claim(s) or which is “Y” document of particular relevance; the claimed invention cannot be cited to establish the publication date of another citation or other considered to involve an inventive step when the document is special reason (as specified) combined with one or more other such documents, such combination “O” document referring to an oral disclosure, use, exhibition or other being obvious to a person skilled in tile art means document member of the same patent family “P” document published prior to the international filing date but later than the priority date claimed Date of the actual completion of the international search 15 March 2024 Date of mailing of the international search report 02 April 2024 Name and mailing address of the ISA / JP Japan Patent Office (ISA / JP) 3-4-3 Kasumigaseki, Chiyoda-ku, Tokyo 100-8915 Japan Authorized officer Telephone No.INTERNATIONAL SEARCH REPORT Information on patent family membersInternational application No.PCT / JP2024 / 005559Patent document cited in search report Publication date (day / month / year) Patent family member(s) Publication date (day / month / year) JP 2013-57172 A 28 March 2013 (Family: none) JP 2013-174058 A 05 September 2013 (Family: none) JP 2019-148100 A 05 September 2019 (Family: none) JP 2022-115422 A 09 August 2022 (Family: none)

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