AU2024203328B2

AU2024203328B2 - Under-stairs structure

Info

Publication number: AU2024203328B2
Application number: AU2024203328A
Authority: AU
Inventors: Kazuya Uei
Original assignee: Sekisui House Ltd
Current assignee: Sekisui House Ltd
Priority date: 2023-10-30
Filing date: 2024-02-16
Publication date: 2025-09-18
Anticipated expiration: 2044-02-16
Also published as: GB202408737D0; AU2024203328A1; GB2641586A

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

1

DESCRIPTION DESCRIPTION TITLE OF TITLE OF INVENTION INVENTION UNDER-STAIRS STRUCTURE UNDER-STAIRS STRUCTURE TECHNICALFIELD TECHNICAL FIELD

[0001]

Thepresent The present invention invention relates relates mainly mainly to under-stairs to an an under-stairs

structure of structure of aa residential residential building. building.

BACKGROUND ART BACKGROUND ART

[0002]

Understairs Under stairsofofaabuilding buildingsuch suchasas a residence, a residence, a space a space with with a a

low sloped low slopedceiling ceiling isis formed. formed.Since Since the space the space is notissuitable not suitable for for

utilization utilization as as a a general habitableroom, general habitable room, it it isisconventionally conventionally utilized utilized forfor a a

purposeofofstorage, purpose storage, toilet,ororthe toilet, thelike. like.

[0003]

Various inventions Various inventions have havebeen been created created to more to more efficiently efficiently

utilize such utilize suchan anunder-stairs under-stairsspace. For example, space. For example,ananinvention inventionin in which which

a home a officeororaaworkspace home office workspace is provided is provided under under stairs stairs has been has been proposed proposed

(see PatentLiterature (see Patent Literature1 1and and Patent Patent Literature Literature 2). 2In ). this In invention, this invention, the the

workspace workspace etc. etc. utilized utilized basically basically in ainsitting a sitting posture posture is provided is provided under under

the stairs. the stairs. Therefore, Therefore,even even such such an under-stairs an under-stairs space space with with a low a low

ceiling is ceiling is less less likely likely totogive giveoppressive oppressive feeling, feeling, andunder-stairs and the the under-stairs

spacecan space canbebe utilized utilized efficiently. efficiently.

2

[0004]

Moreover, an Moreover, an invention invention in in which a playroom which a playroomor or aa study study space space

for children for is provided children is providedtotoa aspace space under under stairs stairs has has also also been been proposed proposed

(see Patent (see Patent Literature Literature 33 and andPatent PatentLiterature Literature4). 4). When When the under- the under-

stairs space stairs is utilized space is utilized as as aa space spacefor forchildren, children,even even a low a low ceiling ceiling is is less less

likely likely to likely tobe to be aaa nuisance. be nuisance. A space nuisance. AA space space with with with a moderately aa moderately moderately low low ceiling low ceiling ceiling also also also has has has

an advantage an advantageofofeasily easilyencouraging encouraging children children to to take take staticbehaviors, static behaviors,

such such asaaanap, as such as nap,reading, nap, reading, andand reading, and studying. studying. studying.

CITATIONLIST CITATION LIST PATENT LITERATURES PATENT LITERATURES

[0005]

Patent Literature Patent Literature 1: 1:JP2003-227237A JP2003-227237A

Patent Literature Patent Literature 2: 2:JP2013-57172A JP2013-57172A

Patent Literature Patent Literature 3: 3:JP2014-62419A JP2014-62419A

Patent Literature Patent Literature 4: 4:JP2015-209646A JP2015-209646A

SUMMARYOF SUMMARY OFTHE THE INVENTION INVENTION TECHNICAL PROBLEMS TECHNICAL PROBLEMS

[0006]

Meanwhile, Meanwhile, in in recent recent years, years, with with increasing increasing opportunities opportunities to to

work from work from home, home,a aresidence residenceisisalso also required required to to have have aa space spacesuitable suitable

for home for working. Moreover, home working. Moreover, in in a case a case in in which which a child-rearing a child-rearing

generation works generation works from fromhome, home,they theydemand demandto to achieve achieve both both of of working working

from home from homeand andwatching watching over over theirchildren. their children.

[0007]

In this In this respect, an object respect, an objectof of the thepresent presentinvention invention is is to to provide an under-stairs structure which enables to efficiently utilize a space, and to achieve 27 Aug 2025 both of working from home and watching over a child.

[0007a]

It is also an object of the present invention to overcome or ameliorate at least one of

the disadvantages of the prior art, or to at least provide a useful alternative thereto. 2024203328

SOLUTIONS TO PROBLEMS

[0007b]

In a first aspect, the present invention provides an under-stairs structure formed under

stairs, the stairs including at least a linear part without a turn and a landing, the stairs being

positioned inside a habitable room, the linear part and the landing being placed lower than a

ceiling of the habitable room, and the stairs connecting a lower floor and an upper floor, the

under-stairs structure comprising: a sloped ceiling formed at an underside of the linear part; a

horizontal ceiling formed at an underside of the landing; and an under-stairs space formed

under the stairs to include at least under the sloped ceiling and the horizontal ceiling, wherein

the under-stairs space is divided into two spaces by a half wall 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 under the horizontal ceiling, and including a desk top

board projecting from the half wall, and the child space is open toward the habitable room, a

part of the landing lower than the ceiling of the habitable room is open toward the habitable

room, and a first partition wall with joinery including a transparent part installed is provided

between the workspace and the habitable room.

[0008]

Also disclosed herein is an under-stairs structure formed under stairs, the stairs 27 Aug 2025

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 2024203328

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 aspect of the present application relates to the under-stairs structure

according to the first aspect, 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 aspect of the present application relates to the under-stairs structure according

to the second aspect, 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 aspect of the present application relates to the under-stairs structure

according to the third aspect, wherein the joinery includes a transparent part.

[0012]

A fifth aspect of the present application relates to the under-stairs structure according 27 Aug 2025

to the first aspect, 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 aspect of the present application relates to the under-stairs structure according 2024203328

to the fifth aspect, wherein the clerestory is openable and closable.

[0014]

A seventh aspect of the present application relates to the under-stairs structure

according to the fifth aspect, wherein a custom-made shelf storage is formed along the

external wall below the clerestory.

[0015]

An eighth aspect of the present application relates to the under-stairs structure

according to the third aspect, 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 aspect of the present application relates to the under-stairs structure according

to the third aspect, 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] 27 Aug 2025

According to the first aspect 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 2024203328

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 aspect 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 aspect 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 27 Aug 2025 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. 2024203328

[0020]

According to the fourth aspect 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 aspect 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 aspect of the present application, the clerestory is openable and

closable, and thereby the workspace can be ventilated.

[0023]

According to the seventh aspect 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 27 Aug 2025 without blocking the window.

[0024]

According to the eighth aspect 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 2024203328

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 aspect 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.

8a

Fig. 2 is a partially abbreviated vertical sectional view illustrating configurations of 27 Aug 2025

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

9

betweenaahome between home officeand office andthe thejoinery. joinery.

Fig. 4 is Fig. 4 is aa view viewillustrating illustrating aa first first partition partition wall wall and an and an

entrance/exit formed entrance/exit formed at at aa boundary between a achild boundary between child space spaceand and a a

habitable room habitable viewedfrom room viewed froma ahabitable habitableroom room side. side.

Fig. Fig. 5 is a 5 is viewIllustrating a view Illustrating lighting lighting and andventilation ventilationthrough througha a

clerestory. clerestory.

Fig. Fig. 6 is an 6 is enlargedsectional an enlarged sectional view view illustrating illustrating a structure a structure in in

whicha asound which sound insulator insulator is is provided provided inside inside of aofsecond a second partition partition wall. wall.

Fig. Fig. 7 Fig. 7 is aaa partially 7 is is partially abbreviated partially abbreviated horizontal sectional abbreviated horizontal horizontal sectional view sectional view view

illustrating aa modification illustrating of an modification of embodiment an embodiment in which in which the stairs the stairs is placed is placed

at an at inside of an inside of aa habitable habitableroom roomas as living living stairs. stairs.

Fig. 8: is Fig. 8: is aa perspective perspectiveview view illustratinga amodification illustrating modification of an of an

example example ininwhich which thethe stairs stairs is is placed placed at at an an inside inside of aofhabitable a habitable roomroom as as

living stairs. living stairs.

DESCRIPTION DESCRIPTION OF OF EMBODIMENTS EMBODIMENTS

[0027]

Hereinafter, anembodiment Hereinafter, an embodiment of under-stairs of an an under-stairs structure structure of the of the

present invention present invention is is described describedwith withreference referencetotoeach each drawing. drawing. An An

under-stairsstructure under-stairs structure1 1ofofthis thisembodiment embodiment is anisunder-stairs an under-stairs structure structure

11 provided provided to to aa building building such suchasasa adetached detached house house or aor a duplex-type duplex-type

apartmentbuilding apartment building with with two two or or more more stories. stories. The under-stairs The under-stairs structure structure

11 includes stairs 22 connecting includes stairs connecting a lower a lower floor floor andand an upper an upper floor, floor, a sloped a sloped

ceiling 33 formed ceiling at an formed at an underside undersideofofthe thestairs stairs 2, 2, and andananunder-stairs under-stairs

space4 4formed space formed under under the the stairs stairs to include to include under under the sloped the sloped ceilingceiling 3. 3.

[0028]

10

As illustrated As illustrated in in Fig. Fig. 1, 1, the the stairs stairs 22 are are placed in such placed in sucha a

manner thatone manner that oneside sidewall wallthereof thereofatatthe thelower lowerfloor floorisisadjacent adjacenttotoa a

habitable room habitable 5. Note room 5. Note thatininthis that this embodiment thehabitable embodiment the habitableroom room5 5isis

a space a space including including aa living living room, room, a dining room, a dining or both room, or both of of them. them.

Althoughthe Although thehabitable habitable room room 5 is 5not is limited not limited to this, to this, since since the habitable the habitable

room 55is room is aa space spacedirectly directly accessible accessible from fromaaworkspace workspace 6 and 6 and a child a child

space7 7which space which willbebe will described described later, later, thethe habitable habitable roomroom 5 is preferably 5 is preferably

a spaceutilized a space a utilized by byall all the the residents. residents. Moreover, Moreover, in this in this embodiment, embodiment, the the the

stairs 22 are stairs are placed placedininsuch such a manner a manner that that the other the other side thereof side wall wall thereof at at

the lower the lowerfloor floor is is adjacent adjacenttotoa atoilet toilet room room8 8and and a hallway a hallway 9. 9.

[0029]

As illustrated As illustrated in in Figs. Figs. 22 and and3,3,the thestairs stairs2 2include include at at least least a a

linear part linear part 10 withoutaaturn. 10 without turn. That That is, is, thethe stairs stairs 2 include 2 include straight straight stairs stairs

without a without turned part, a turned part, L-shaped stairs with L-shaped stairs with aa bend at 90 bend at degreesin 90 degrees in an an

intermediate portionthereof, intermediate portion thereof, or or U-shaped U-shaped stairs stairs or winder or winder stairs stairs with awith a

turn at turn at 180 degreesatatananintermediate 180 degrees intermediate portion portion thereof, thereof, whereas whereas the stairs the stairs

2 do 2 do not notinclude includestairs stairswithout without thethe linear linear part part 10, 10, suchsuch as spiral as spiral stairs, stairs,

for example. for Note example. Note that that thethe stairs2 2are stairs are U-shaped U-shaped stairs stairs or or L-shaped L-shaped

stairs formed stairs in such formed in sucha amanner manner thatthat an upper an upper end end of theoflinear the linear part part 10 is 10 is

a landing a landing11. 11.In aIncase a case in which in which the landing the landing 11 is 11 is formed formed adjacently adjacently to to

an external an externalwall wall12, 12,the theunder-stairs under-stairsspace space 4 formed 4 formed under under the linear the linear part part

10 and the 10 and thelanding landing1111isisalso alsoadjacent adjacent to to thethe external external wall wall 12.12. By By By

providing providing aawindow window to the to the external external wall wall 12 adjacent 12 adjacent to the to the under-stairs under-stairs

space4,4,asasillustrated space illustrated in in Fig. Fig. 5, 5, lighting lighting LL and ventilation W and ventilation of the W of the under- under-

stairs space stairs space 44are arepossible, possible, and and comfortability comfortability of the of the under-stairs under-stairs spacespace

11

4 can 4 can be be improved. improved. TheThe sloped sloped ceiling ceiling 3 3 formed formed atatthe theunderside undersideofofthe the

linear part linear part 10 is preferably 10 is formedatataaheight preferably formed heightwithin withinatatleast leastaarange range from from

600 mm 600 mmtoto1800 1800mmmm fromfrom a floor a floor surface surface 13 13 of of thethe lower lower floor.In In floor. this this

embodiment, embodiment, thethe stairs stairs 2 are 2 are U-shaped U-shaped stairsstairs in which in which the linear the linear part part 10 10

without aa turn without turn is is formed formedfrom from thethe floor floor surface surface 13 13 of the of the lower lower floor floor to to an an

eleventhstep, eleventh step,the theeleventh eleventh step step forms forms the the landing landing 11,aand 11, and a turned turned part part

15 is formed 15 is bytwo formed by twosteps steps to to reach reach a floor a floor surface surface of the of the upper upper floor. floor. In In In

the stairs the stairs 22 of of this this embodiment, the embodiment, the landing landing 11 11 faces faces the the external external wall wall 12 12

at aa side at oppositetotothe side opposite thelinear linearpart part10. 10.

[0030]

Note that, asasillustrated Note that, illustrated inin Fig. Fig.1,1,thethe stairs2 of stairs 2 this of this

embodiment embodiment are are formed formed to have to have a length a length of 1 m of in1amwidth in a direction, width direction, and and

a length a length of of 33mminina ahorizontal horizontal direction direction when when combining combining lengthslengths of the of the

linear part linear part10 10 and and the the landing landing 11. When 11. When thethe width width ofofthe thestairs stairs 2, 2, and and

the total the total length of the length of the linear linear part part 10 10 and andthe thelanding landing 11 11 areare eacheach formed formed

to be to be aa multiple multipleofofaamodule module unit unit in in designing designing a building, a building, designing designing and and

product proposal product proposal can can be be easy. easy. Particularly, Particularly, in in this this embodiment, widths embodiment, widths

of the of toilet room the toilet room 88 and andthe thehallway hallway 9 provided 9 provided adjacently adjacently to stairs to the the stairs 2 2

are also are also formed formedin in a module a module unit,unit, thus thus beingbeing easilyeasily incorporated incorporated in the in the

building design building design as as a a whole. Therefore, whole. Therefore, theunder-stairs the under-stairsstructure structure11ofof

this embodiment this embodiment asaswell wellas asthe the toilet toilet room 8 and room 8 and the the hall hall way way 99 can can be be

commercializedasasa aset commercialized set plan. plan.

[0031]

As illustrated As illustrated in in Figs. Figs. 22 and 3, under and 3, underaafourth fourthstep stepofofthe thelinear linear

part 10 part 10 of of the the stairs stairs 2, 2, aa vertical vertical wall wall surface 14vertically surface 14 vertically standing standingfrom from

12

the floor the floor surface 13 of surface 13 of the the lower lowerfloor floor is is formed. formed.TheThe vertical vertical wall wall

surface1414stands surface standsto to reach reach a height a height corresponding corresponding to a step to a third thirdofstep the of the

stairs 2. stairs Thesloped 2. The sloped ceiling3 is ceiling 3 is formed formed fromfrom an upper an upper end end of theof the

vertical wall vertical wall surface surface1414upwardly upwardly in ain a slope sloped d direction direction of the of the stairs stairs 2. 2.

Theheight The heightatatthe theupper upper end end of of thethe vertical vertical wallsurface wall surface 14 14 is,is, forforexample, example,

600 mm. 600 mm.TheThe sloped sloped ceiling3 3isis formed ceiling formedfrom fromthe the upper upper end endof of the the

vertical wall vertical surface1414totonear wall surface near an an underside underside of a of a riser riser to gotoupgo up afrom from a

tenth step tenth step to to the the eleventh eleventhstep stepofofthe thestairs stairs2.2.A height A height A height at upper at at an anupper an upper end endend

of the of the sloped slopedceiling ceiling3 3isisa aheight height corresponding corresponding to a ninth to a ninth step step of the of the

stairs 2. stairs 2. AAhorizontal horizontal ceiling ceiling 16 is formed 16 is from the formed from the upper upperend endofofthe the

slop ceiling slop ceiling 33 to to the the external external wall wall 12. The 12. The horizontal horizontal ceiling ceiling 16 16 is placed is placed

at an at undersideofofthe an underside thelanding landing 11 11 which which is the is the eleventh eleventh step step of stairs of the the stairs

2, and 2, is formed and is ataaheight formed at height(for (for example, example, 1800 1800 mm from mm from the floor the floor surface surface

13) 13) lower lower than than a a ceiling ceilingofofthe theadjacent adjacenthabitable habitableroom room 55. . The Thesloped sloped

ceiling 3 ceiling is formed 3 is formed atata aheight heightwithin within a range a range fromfrom 600tomm 600 mm to for 1800, 1800, for

example. TheThe example. height height dimensions dimensions of of thethe sloped sloped ceiling3 3andand ceiling thethe

horizontal ceiling horizontal ceiling16 16 are are not not limited limitedtotothose, those,but butmay may be any heights be any heights

which allow which allow arrangement of the arrangement of the child child space space 77 and and the the workspace workspace 66

describedlater. described later.

[0032]

In In this this embodiment, a space embodiment, a space between between the vertical the vertical wall wall surface surface

14 and the 14 and theexternal externalwall wall12, 12,and andunder under thethe sloped sloped ceiling ceiling 3 and 3 and the the

horizontal ceiling horizontal ceiling 16 is the 16 is under-stairs space the under-stairs space4.4.The The under-stairs under-stairs

space 44 is space is formed formedunder underthe thesloped slopedceiling ceiling3,3, and andincludes includesa awainscot wainscot

17 standing from 17 standing from the the floor floor surface surface 13 13 of of the the lower lower floor. floor. The wainscot The wainscot

13

17 divides the 17 divides the under-stairs under-stairs space space4 4into intotwo twospaces, spaces, where where a space a space

positionedatataa side positioned sidewhere where the the sloped sloped ceiling ceiling 3 is 3 is lower lower is is thethe child child space space

7, and 7, and aaspace space positioned positioned at aatside a side where where the sloped the sloped ceilingceiling 3 is higher 3 is higher

is the is theworkspace 6. A Asecond workspace 6. second partitionwall partition wall 18 18 is is formed formed as as a a boundary boundary

between between the the under-stairs under-stairs space space 4, the 4, and andtoilet the toilet room room 8 and 8the and the hallway hallway

9, and 9, therebythe and thereby theboundary boundary is fully is fully closed. closed.

[0033]

The wainscot The wainscot1717isis formed formedtotohave havea aheight heightof, of,for for example, example,

900mm 900 mm from from thethe floor floor surface surface 13, 13, and and a transparent a transparent plate plate 19 is 19 is provided provided

to stand to onthe stand on thewainscot wainscot 17. 17. The transparent The transparent plate plate 19 19 is formed is formed in such in such

a a manner a manner that mannerthat that an anan upper upper end endend upper thereof thereof contacts contacts thereof the sloped the sloped contacts the sloped ceiling ceilingceiling 3. 3. The 3. The The transparent plate transparent plate 19 19 isis made madeof of glass glass or transparent or transparent resin, resin, and and for for

example, provided example, providedwith with aa window-shaped window-shaped frame. frame. The The transparent transparent plate plate

19 is formed 19 is from the formed from the upper upperend endofofthe thewainscot wainscot1717totoa aheight heightofof500 500

mm,for mm, for example. example.

[0034]

As illustrated As illustrated inin Fig. Fig.2,2,the the child childspace space 77 is is aa space space

surrounded surrounded by by thethe floor floor surface surface 13the 13 of of lower the lower floor, floor, the sloped the sloped ceiling ceiling

3, the 3, the wainscot 17 and wainscot 17 andthe thetransparent transparentplate plate19, 19,and andthe thevertical verticalwall wall

surface 14 surface formed at 14 formed at the the opposite opposite side side to to the the wainscot wainscot 17. 17.As As

illustrated in illustrated in Figs. Figs. 11 and 4, the and 4, child space the child space 7 7isis formed formedinin such such a manner a manner

that aa boundary that with respect boundary with respect to to the the adjacent adjacent habitable habitable room room55is is open. open.

Moreover, the child Moreover, the child space 7 is space 7 is formed formed in in such such aa manner that aa boundary manner that boundary

with respect with respecttotothe thehallway hallway9 9 and and thethe toilet toilet room room 8 which 8 which are adjacent are adjacent to to

the child the child space 7 is space 7 is closed closed by by the the second second partition partition wall wall 18. An 18. An

14

entrance/exit2020isisformed entrance/exit formedatat theopen the open boundary boundary between between the space the child child space

7 and 7 and the the habitable habitable room room5 5totohave have a shape a shape like like a gable a gable surface surface of of a a

residence. AnAn residence. upper upper edge edge of the of the entrance/exit entrance/exit 20 20 is is formed formed to to have have a a

mountain-likeshape mountain-like shape byfirst by a a first slope slope partpart 21 along 21 along the sloped the sloped ceilingceiling 3, 3,

andaasecond and second slope slope part part 22 22 having having an inverse an inverse slopeslope of theoffirst the first slopeslope part part

21, and 21, and both both side side edges edgesofofthe theentrance/exit entrance/exit2020are areformed formed along along thethe

vertical wall vertical wall surface 14and surface 14 and the the wainscot wainscot 17. 17.

[0035]

As illustrated As illustrated in in Figs. Figs. 2 2 and 3, the and 3, the sloped slopedceiling ceiling3 3ofofthe thechild child

space 77 is space is provided with aa ceiling provided with ceilingembedded-type downlight23 embedded-type downlight 23which whichisis

embeddedininthe embedded the sloped sloped ceiling ceiling 3. Thelightning 3. The lightning equipment equipment of of the the

ceiling embedded ceiling type does embedded type doesnot not protrude, protrude, and thereby injury and thereby injuryand anddamage damage

can be can besuppressed. suppressed. Moreover, Moreover, although although not illustrated, not illustrated, the ceiling the ceiling

embedded-type embedded-type downlight downlight 23 23 maymay be adjustable be adjustable of angle of an an angle of LED of an an LED

light light light source, source, for example. source, for for example.Moreover, example. Moreover, Moreover, although although although not not illustrated, not illustrated, illustrated, the the the

ceiling embedded-type ceiling downlight2323may embedded-type downlight maybe be provided provided with with a filter cover a filter cover

which diffuses which diffuses light light just just before before aa light light source. source. Light Light is preferably is preferably

diffused widely diffused widelyentirely entirelyacross across the the child child space space 7. 7.

[0036]

Thechild The childspace space 7 isa asmall 7 is small space space in which in which the ceiling the ceiling is low, is low,

and the and the floor floor surface surface 13 has, for 13 has, for example, example, aa square squareshape shape with with a 900 a 900

mmside. mm side. A child A child can can feel feel comfortability comfortability by by achieving achieving bothboth of of

moderatelyopen moderately open feeling feeling by by the the child child space space 7 being 7 being open open at theat the habitable habitable

room5 5side, room side,and and comfortably comfortably secluded secluded feeling. feeling.

[0037]

15

As illustrated As illustrated in in Figs. Figs. 11 and 2, the and 2, workspace6 6isisformed the workspace formed

betweenthe between thefloor floor surface surface 13 13atatthe thelower lowerfloor floor and anda aceiling ceiling surface. surface.

The ceiling The ceiling surface surface is is formed by the formed by the sloped slopedceiling ceiling 33 which whichcontinues continues

from the from thechild childspace space7, 7, and and thethe horizontal horizontal ceiling ceiling 16the 16 at at the underside underside of of

the landing the landing 11. Theworkspace 11. The workspace 6 is 6 is partitionedbybythe partitioned thewainscot wainscot1717and and

the transparent the transparentplate plate19, 19,and and thethe external external wall wall 12 12 formed formed at opposite at the the opposite

side to side to the the wainscot 17. TheThe wainscot 17. workspace workspace 6 is 6a is a surrounded surrounded space space in in

whichaaboundary which boundary with with respect respect to the to the habitable habitable room room 5 is closed 5 is closed by a by a first first

partition wall partition wall24, 24,and and aa boundary with respect boundary with respecttotothe thetoilet toilet room room 88isis

closedbybythe closed thesecond second partition partition wall wall 18. 18. As illustrated As illustrated in Figs. in Figs. 3 and 3 4,and 4,

the first the first partition partition wall 24 isis provided wall 24 provided with with joinery joinery 25 installed 25 installed thereto. thereto.

Thejoinery The joinery2525is isthe the entrance/exit entrance/exit 20 ortofrom 20 to or from the habitable the habitable room 5.room 5.

The joinery The joinery 25 25is, is, for for example, example,a ahinged hinged door, door, andand is provided is provided withwith

rectangular openings rectangular at upper openings at upper and andlower lower portionsthereof. portions thereof.Each Each

rectangular opening rectangular includes a opening includes transparent glass a transparent glass plate plate embedded embedded

therein to therein to form form a a transparent part 26. transparent part 26. InInthis this manner, manner,bybyforming formingthe the

transparentpart transparent part2626ininthe thejoinery joinery25, 25,the theworkspace workspace 6 which 6 which is closed is closed by by

the first the first partition partition wall wall 24 24 can still make can still thespace make the space open open at the at the habitable habitable

room 55 side room side with with small small oppressiveness. oppressiveness.

[0038]

As illustrated As illustrated in in Fig. Fig. 2, 2, in in the the workspace workspace 6, 6, a horizontal a horizontal desk desk

top board top 27 is board 27 is formed formed to to project project from from the the wainscot 17. The wainscot 17. The desk desk toptop

board2727isisformed board formedat at a height a height of of 700700 mm the mm from fromfloor the floor surface surface 13, and13, and

a projecting a projecting length lengthofofthe thedesk desktoptop board board 27the 27 to to the workspace workspace 6 side 6 side is, is,

for example, for 500 example, 500 mm. mm. A stand A stand light light 28 28 can which which can diffuse diffuse light islight is placed placed

16

on the on the desk desk top top board board2727totolight light up up the the workspace workspace6. 6. NoteNote that that the the

ceiling of ceiling of the the workspace workspace 6 6 may may also also be be provided provided with with lightning lightning equipment. equipment.

Although not Although notillustrated, illustrated, an outlet can an outlet can bebeformed formed at at an an appropriate appropriate

position of the position of the workspace 6 tosupply workspace 6 to supply power power to the to the stand stand light light 28,28, a laptop, a laptop,

a tablet a tabletterminal, terminal,or or the the like. like.

[0039]

A chair A chair 29 29 is is placed placed in in the theworkspace workspace 66 in in such a manner such a mannerasas

to allow to seating facing allow seating facing toward toward the the desk desktop topboard board 27. 27. As described As described

above, in above, in the the case case in in which whichthe thedesk desktop topboard board 27 27 is is provided provided at at thethe

height of height of 700 mm,and 700 mm, andthe thewainscot wainscot 17 17 hashas the the height height of 900 of 900 mm, mm, an an

upper portion upper portion of of the the wainscot 17 projects wainscot 17 projects upward upwardbyby200 200 mm mm fromfrom the the

desk top desk top board board 27, 27, and and the the transparent transparent plate plate 19 19 is is placed placed on on the the

projecting portion. projecting When portion. When a person a person is seated is seated in chair in the the chair 29 facing 29 facing

toward the toward the desk desk top top board board 27, 27, the the seated seated person personcan canvisually visually recognize recognize

the child the child space space 77through throughthe thetransparent transparent plate plate 19.19. Therefore, Therefore, the the

personcan person canwatch watch over over a child a child in the in the child child space space 7 during 7 during deskwork deskwork or a or a

video conference video conference in in the the workspace 6. workspace 6.

[0040]

Whena aperson When personisisseated seatedininthe thechair chair 29 29in in the the workspace workspace6,6,

the external the external wall wall 12 12 is is formed formed at at the the back side. The back side. The externalwall external wall1212

includes aa clerestory includes clerestory 30 formedalong 30 formed alongthe thehorizontal horizontalceiling ceiling 16. 16. TheThe

clerestory 30 clerestory 30 is is formed across the formed across the entire entire length length of of the the workspace workspace 66in in

the width the width direction, direction, and and aalength lengthofofthe theclerestory clerestory3030 in in thethe height height

direction is, direction is, for forexample, 300 mm. example, 300 mm.As illustrated As illustrated in Fig. in Fig. 5, the 5, by by the

clerestory 30 clerestory being provided 30 being provided to to the the workspace workspace6,6,light light LLcan canbebelet letinin

17

from outdoors. from outdoors. Moreover, Moreover, by by the the clerestory30 clerestory 30being beingprovided providedalong alongthe the

horizontal ceiling horizontal ceiling 16, 16,the thelight light LLlet let in in from fromoutdoors outdoorscancan alsoalso enter enter the the

child child space space 77 child space without 7 without being without being blocked. being blocked. Note blocked. Note Note that,for that, that, forexample, for example,when example, when when thethe the

slopedceiling sloped ceiling33has hasa acolor colorsuch such as as white white which which easily easily reflects reflects light, light, the the

slopedceiling sloped ceiling33reflects reflects light light to to let let much light to much light to enter enter the the child child space space7.7.

Althoughthe Although theclerestory clerestory 30 30 may may be a be a fixed fixed window, window, it is preferably it is more more preferably

openableand openable andclosable. closable.TheThe openable openable and closable and closable clerestory clerestory 30 30 can can

let outside let outside air airWW into into the the workspace workspace 6. 6. InInthis this embodiment, embodiment,the the

clerestory 30 clerestory 30isis aa double doublesliding slidingwindow. window.

[0041]

A custom-made A custom-madeshelf shelfstorage storage31 31 is is provided provided along along the the

external wall external wall 12 belowthe 12 below theclerestory clerestory 30. 30. TheThe custom-made custom-made storage storage

shelf storage shelf storage3131maymay be utilized, be utilized, for for example, example, as a space as a space for storing for storing a a

documentororequipment document equipment necessary necessary for for deskwork, deskwork, or may or may storestore various various

bookssosothat books thatthe theworkspace workspace 6 also 6 can can also function function as alibrary. as a home home library.

[0042]

In In the the workspace workspace 6,6,the theboundary boundary with with respect respect to to thethe child child

space 77 is space is closed closed by by the the wainscot wainscot 17 17and andthe thetransparent transparentplate plate19, 19,the the

boundary with boundary with respect respect to the to the toilet toilet 8 is8 closed is closed bysecond by the the second partition partition

wall 18, wall 18, and andthe theboundary boundary with with respect respect to the to the habitable habitable room room 5 is closed 5 is closed

by the first by the first partition partitionwall wall24. Therefore, daily 24. Therefore, daily life life noise causedbyby noise caused

anotherresident, another resident,voices voicesof of a child a child playing, playing, andand the the likelike areare less less likely likely to to

be heard be heard in in the the workspace workspace 66 during during a a video video conference or deskwork, conference or and deskwork, and

less likely to less likely to disturb disturb working fromhome. working from home.

[0043]

18

In In this this embodiment, asillustrated embodiment, as illustrated in in Figs. Figs.2 2and and 6, 6, aa sound sound

insulator 32 insulator 32 made madeof of glass glass wool wool is is disposed disposed at each at each of a of a ceiling ceiling backside backside

of the of the sloped slopedceiling ceiling3,3,a a ceiling ceiling backside backside of horizontal of the the horizontal ceiling ceiling 16, 16,

andananinside and insideofofthe the second second partition partition wallwall 18provide 18 to to provide sound sound proofing proofing

properties. In In properties. this this manner, manner, by the by the partition partition wallwall between between the workspace the workspace

6 and 6 thechild and the child space space7,7,and andthe theceiling ceilinghaving having sound sound proofing proofing properties, properties,

the workspace the workspace 66can canbebemade made a quieterand a quieter and easy-to-work easy-to-work space. space. Note Note Note

that the that the structure whichimproves structure which improves sound sound proofing proofing properties properties ofsloped of the the sloped

ceiling 3, ceiling 3, the the horizontal horizontalceiling ceiling16, 16,and and thethe second second partition partition wall wall 18 is 18 is

not limited not limited to to the the glass woolsound glass wool sound insulator insulator 32, 32, but but may may be, be, for for example, example,

a dumper a whichabsorbs dumper which absorbsimpact, impact,ororanother anothersound sound absorbing absorbing material material oror

soundinsulator sound insulator32. 32.

[0044]

Note that, Note that, in in this this embodiment, thestairs embodiment, the stairs 22 formed formedwith withthe the

under-stairsstructure under-stairs structure1 1is, is, but but not notlimited limited to, to, placed placedatatananoutside outsideofof and and

adjacent to adjacent to the the habitable habitable room room55(for (for example, example,a aliving living room) room)with with the the

first partition first partitionwall wall24 24interposed therebetween. interposed therebetween. As illustrated As illustrated in Figs. in Figs. 7 7

and8,8,the and thestairs stairs22may maybe,be, like like what what is called is called living living stairs, stairs, placed placed on aon a

habitableroom habitable room 5 side 5 side ofpartition of a a partition wall wall 33, 33, and and placed placed at an at an inside inside of of

and adjacent and adjacent to to the the habitable habitable room room5.5.In this In this manner, manner, by the by the under- under-

stairs structure stairs structure 11 being beingformed formedat at thethe inside inside of of thethe habitable habitable roomroom 5, 5, the the

linear part linear part 10 10 and andthe the landing landing 11 the 11 of of the stairs stairs 2 are 2 are placed placed adjacent adjacent to to

the living the living room roomwithout without a partition a partition wallwall interposed interposed therebetween. therebetween.

Therefore, the Therefore, the linear linear part part 10 and the 10 and the landing landing 11 11can canbebeincorporated, incorporated,

togetherwith together withthe thechild childspace space7 7 and and thethe workspace workspace 6, as6, a as setacomponent set component

19

adjacent to adjacent to the the living livingroom room in indesigning designing and and arrangement proposalofof aa arrangement proposal

building. building.

[0045]

Needless to say, Needless to say, the the embodiment embodiment of of thepresent the present inventionisis invention

not limited not limited to to the embodiment the embodiment described described above, above, but but can suitably can suitably be be

changed changed without without departing departing fromfrom the spirit the spirit of the of the present present invention. invention.

[0046]

A first A first invention of the invention of the present presentapplication application is is an an under-stairs under-stairs

structure formed structure formedunder under stairs. stairs. The stairs The stairs include include at aleast at least a linear linear part part

without aa turn, without turn, and andconnect connecta lower a lower floor floor andand an upper an upper floorfloor to beto be

adjacent to adjacent to aa habitable habitable room. room.TheThe under-stairs under-stairs structure structure includes includes a a a

slopedceiling sloped ceilingformed formedat at an an underside underside of linear of the the linear part, part, and and an an under- under-

stairs space stairs formed space formed under under the the stairs stairs to include to include at least at least under under the sloped the sloped

ceiling. The ceiling. The under-stairs under-stairs space space is is divided divided into into two spaces by two spaces by a a

wainscot placed wainscot placedunder under thethe sloped sloped ceiling ceiling and and standing standing from from a floor a floor

surfaceof surface of the the lower lowerfloor. floor. TheThe two two spaces spaces are a are a child child space space positioned positioned

at a at side where a side wherethe thesloped sloped ceiling ceiling is lower, is lower, andand a workspace a workspace positioned positioned

at aa side at where the side where the sloped slopedceiling ceiling is is higher higher and andincluding including aadesk desktop top

boardprojecting board projectingfrom from thethe wainscot. wainscot.

[0047]

Accordingto tothis, According this,thethe stairs stairs include include at least at least the the linear linear part part

without aaturn, without turn,and andthethe under-stairs under-stairs space space including including the sloped the sloped ceiling ceiling

formedatatthe formed theunderside underside of the of the linear linear part part is divided is divided intointo the the two two spaces spaces

by the wainscot, by the wainscot, and the two and the two spaces spaces are are the thechild child space space and andthe the

20

workspaceincluding workspace includingthe thedesk desktop topboard board projecting projecting from from thethe wainscot . wainscot.

Therefore, in Therefore, in aa case case of of work work(for (for example, example,working working from from home) home) while while

facing toward facing toward the the desk desktop topboard board from from thethe workspace workspace side,side, the child the child

space can space canbebeseen seen on on thethe opposite opposite side side with with thethe wainscot wainscot interposed interposed

therebetween,and therebetween, andthereby therebydeskwork deskwork cancan be performed be performed whilewhile watching watching

over aa child. over child. Moreover, Moreover, the child the child space space is positioned is positioned at theat thewhere side side where

the sloped the slopedceiling ceilingisislower, lower,and andthethe workspace workspace is positioned is positioned at the at the side side

wherethe where thesloped sloped ceiling ceiling is is higher. higher. Therefore, Therefore, the child the child space space can can be can a be aa be

small space small spacewhich which hashas the the low low ceiling ceiling and and encourages encourages a childa to child to seclude seclude

his/herself therein, and his/herself therein, andthe theworkspace workspace is arranged is arranged at side at the the side wherewhere the the

ceiling is ceiling is higher than that higher than that of of the the child child space. space.Thus, Thus, the spaces the spaces having having

two roles two roles can can be beprovided providedunder under thethe stairs,and stairs, and space space efficiency efficiency cancan

further be further be improved. improved.

[0048]

A second A secondinvention inventionofofthe thepresent presentapplication applicationisis the theunder- under-

stairs structure stairs structure of of the the first firstembodiment, embodiment, where where aa transparent transparentplate plateisis

provided to provided to stand stand on the wainscot, on the wainscot, and an upper and an upperend endofofthe the transparent transparent

plate continues plate continuestotothe thesloped sloped ceiling. ceiling.

[0049]

According totothis, According this, the the wainscot wainscotand and thethe transparent transparent plate plate

continuingfrom continuing fromthe thetop topofofthe thewainscot wainscotto to thethe sloped sloped ceiling ceiling are are provided provided

betweenthe between the child child space and the space and the workspace. Therefore, workspace. Therefore, while while watching watching

over aa child over child from from the the workspace, workspace,a sound a sound mademade bychild by the the child can can be be

blocked to blocked to some extent, thereby, some extent, thereby, for forexample, example,suppressing suppressing aa microphone microphone

21

picking up picking up the the sound madebybythe sound made thechild child in in aa case case of of a a video video conference conference

or the or thelike. like.

[0050]

A third A third invention invention of of the the present presentapplication application is is the the under-stairs under-stairs

structure of structure of the thefirst first invention invention ororthe thesecond second invention, invention, where where the the child child

spaceisisopen space open toward toward the the habitable habitable room,room, and apartition and a first first partition wall wall with with

joinery installed joinery installed thereto thereto is is provided provided between theworkspace between the workspace and and the the

habitable room. habitable room. TheThe under-stairs under-stairs space space is entirely is entirely closed closed at aatside a side

oppositetotothe opposite thehabitable habitableroom room by abysecond a second partition partition wall.wall.

[0051]

Accordingtotothis, According this, the thechild child space spaceisisopen open toward toward thethe habitable habitable

room, and room, andthereby thereby watching watching overover a child a child is possible is possible both both from from the the

workspaceand workspace andfrom from thethe habitable habitable room. room. Moreover, Moreover, the first the first partition partition

wall with wall with the the joinery joinery installed installed thereto thereto is is provided providedbetween betweenthethe workspace workspace

and the and the habitable habitable room, room, and andthe theopposite oppositeside sidetoto the the habitable habitable room roomisis

closedbybythe closed thesecond second partition partition wall. wall. Therefore, Therefore, dailynoise daily life life noise causedcaused

by another by another resident resident is is less less likely likely to to be heard inin the be heard the workspace, workspace,andand

deskwork and deskwork anda avideo videoconference conferencecancan be be performed performed in ainquieter a quieter

environment. environment.

[0052]

A fourth A fourth invention inventionof of the the present presentapplication applicationisisthe theunder-stairs under-stairs

structure of structure of any anyofofthethe firstinvention first invention to to thethe third third invention, invention, where where the the

joinery includes joinery includesa atransparent transparent part. part.

22

[0053]

According According to this, to this, the the joinery joinery installed installed to theto the partition first first partition wall wall

includes the includes the transparent transparent part, part, which which can can suppress the workspace suppress the workspacebeing being

a stifling a stifling space, space,and andmake make the the workspace morecomfortable. workspace more comfortable.

<Fifth <Fifth Invention> Invention>

[0054]

A fifth A fifth invention of the invention of the present presentapplication applicationis isthe theunder-stairs under-stairs

structure of structure of any anyofofthe thefirst first invention inventiontotothe thefourth fourth invention, invention, where where the the

workspaceisisformed workspace formedtotoface faceananexternal externalwall wallatat aaside side opposite oppositetoto the the

child space, child anda aclerestory space, and clerestory is is formed formed along along the external the external wall.wall.

[0055]

Accordingtotothis, According this, the the workspace workspaceis is formed formed to face to face the the external external

wall at wall at the side opposite the side oppositetotothe thechild childspace, space, and and thethe clerestory clerestory is formed is formed

along the along theexternal externalwall, wall,and and thereby thereby light light can can be into be let let into the the workspace workspace

during the during the daytime. daytime. Moreover, Moreover, since since thethe boundary boundary between between the child the child

space and space andthe theworkspace workspace includes includes thethe transparent transparent plate,light plate, light can canalso also

be let into be let into the the child child space from the space from the clerestory. clerestory. Particularly, Particularly, since since aa

windowprovided window provided is the is the clerestory, clerestory, light light cancan reach reach further further at outdoor at the the outdoor

side, and side, andmuch much lightcancan light be be let let into into thethe child child space. space.

<Sixth <Sixth Invention> Invention>

[0056]

A sixth A sixth invention inventionof of the thepresent presentapplication application is is the the under-stairs under-stairs

structure of structure of any anyofofthethe firstinvention first invention to to the the fifth fifth invention, invention, where where the the

clerestory is clerestory is openable openableandand closable. closable.

[0057]

23

Accordingtotothis, According this, the the clerestory clerestoryis is openable openable and and closable, closable, andand

thereby the thereby the workspace canbebeventilated. workspace can ventilated.

[0058]

A seventh A seventhinvention invention of of the the present present application application is is the the under- under-

stairs structure stairs of any structure of anyof of the thefirst first invention to the invention to the sixth sixth invention, invention,where where

a custom-made a custom-made shelf shelf storage storage is formed is formed along along the external the external wall the wall below below the

clerestory. clerestory.

[0059]

According to According to this, this, the the custom-made shelfstorage custom-made shelf storage is isformed formed

below the below the clerestory, clerestory, and and thereby a document, thereby a document,a abook, book,a alaptop, laptop,or or the the

like necessary like for deskwork necessary for canbebestored. deskwork can stored.Since Since the the window window is theis the

clerestory, storage clerestory, storageisis possible possiblewithout without blocking blocking thethe window. window.

[0060]

An eighth An eighth invention invention of of the the present present application application is is the the under- under-

stairs structure stairs of the structure of the first first invention invention to to the seventhinvention, the seventh invention,where where the the

child space child is aa space space is spacesurrounded surrounded by floor by the the floor surface surface of lower of the the lower floor,floor,

the sloped the slopedceiling, ceiling, the thewainscot wainscot and and thethe transparent transparent plate, plate, and and a a vertical vertical

wall surface wall provided at surface provided at an anopposite oppositeside sidetotothe thewainscot. wainscot.An open An open

boundary between boundary between thechild the childspace spaceand andthe thehabitable habitableroom room has has an an upper upper

edge formed edge formedinina amountain-like mountain-likeshape shape by by a first a first slope slope part part along along thethe

sloped ceiling, sloped ceiling, and and aa second slope part second slope part having having an aninverse inverseslope slopeofof the the

first slope first part. slope part.

[0061]

24

According to According to this, this,the theopen openboundary boundary between the child between the child space space

and the and the habitable habitable room roomhas hasthe theupper upper edge edge formed formed in ainmountain-like a mountain-like

shape by shape bythe thefirst first slope slope part part along along the the sloped ceiling, and sloped ceiling, and the the second second

slope part slope parthaving havingthethe inverse inverse slope slope of first of the the first slope slope part.part. Therefore, Therefore,

an entrance an entrance from from the the habitable habitable room to the room to the child child space space can can be be designed designed

like aa gable like gable surface surface of of aa house, house, which can be which can be aa design design to to encourage encouragea a

child to child to enter enter therein. Since therein. Since thethe second second slopeslope part part is is formed, formed, the upper the upper

edgeofofthe edge theboundary boundaryis is notnot in in a single a single pitched pitched shape, shape, buta inmountain- but in a mountain-

like like shape. Therefore, an shape. Therefore, an inner inner circumference circumference of of the the opening has opening has

obtuse angles, obtuse angles, which which can can make makework work such such as as wallpapering wallpapering during during

constructioneasy. construction easy.

[0062]

A ninth A ninth invention inventionofof the thepresent presentapplication application is is the the under-stairs under-stairs

structure of structure of any anyofofthethe firstinvention first invention to to thethe eighth eighth invention invention, , where where a a

ceiling ceiling backside of the backside of thesloped sloped ceilingor or ceiling thethe second second partition partition wallwall

includes includes aastructure structurehaving having sound sound proofing proofing properties. properties.

[0063]

Accordingtotothis, According this,the theceiling ceilingbackside backsideof of the the sloped sloped ceiling ceiling or or

the second the secondpartition partitionwall wallhas hasthe thestructure structure with with sound sound proofing proofing properties. properties.

Therefore, daily Therefore, daily life lifenoise noisecaused caused by going up by going up and anddown downthethe stairsoror stairs

causedonon caused the the opposite opposite side side of the of the second second partition partition wallwall is insulated, is insulated, and and

sound insulating sound insulating properties properties of ofthe theworkspace workspace can be improved. can be improved.

INDUSTRIAL APPLICABILITY INDUSTRIAL APPLICABILITY

[0064]

25

Theunder-stairs The under-stairsstructure structure according according to the to the present present invention invention

is suitable is suitable for for aa residence whichenables residence which enables to achieve to achieve bothboth of child of child rearing rearing

of the of the residence residence and and working from home, working from home,for for example. example.

DESCRIPTION DESCRIPTION OF OF REFERENCE SIGNS REFERENCE SIGNS

[0065]

1 1 under-stairsstructure under-stairs structure

2 2 stairs stairs

3 3 slopedceiling sloped ceiling

4 4 under-stairs space under-stairs space

habitable room habitable room

6 6 workspace workspace

7 7 child child space child space space

linear part linear part linear part

12 12 external wall external wall

17 17 wainscot wainscot

18 18 secondpartition second partitionwall wall

19 19 transparentplate transparent plate

24 24 first partition first wall partition wall

joinery joinery

26 26 transparentpart transparent part

27 27 desk top desk top board board

31 31 custom-made custom-made shelfstorage shelf storage

32 32 sound insulator sound insulator

Claims

CLAIMS 27 Aug 2025

1. An under-stairs structure formed under stairs, the stairs including at least a linear part

without a turn and a landing, the stairs being positioned inside a habitable room, the linear

part and the landing being placed lower than a ceiling of the habitable room, and the stairs 2024203328

connecting a lower floor and an upper floor, the under-stairs structure comprising:

a sloped ceiling formed at an underside of the linear part;

a horizontal ceiling formed at an underside of the landing; and

an under-stairs space formed under the stairs to include at least under the sloped

ceiling and the horizontal ceiling, wherein

the under-stairs space is divided into two spaces by a half wall 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 under the

horizontal ceiling, and including a desk top board projecting from the half wall, and

the child space is open toward the habitable room, a part of the landing lower than the

ceiling of the habitable room is open toward the habitable room, and a first partition wall with

joinery including a transparent part installed is provided between the workspace and the

habitable room.

2. The under-stairs structure according to Claim 1, wherein a transparent plate is

provided to stand on the half wall, and

an upper end of the transparent plate continues to the sloped ceiling.

3. The under-stairs structure according to Claim 2, wherein the child space is open 27 Aug 2025

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. 2024203328

4. The under-stairs structure according to Claim 3, wherein the joinery 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, and

a clerestory is formed along the external wall.

6. The under-stairs structure according to Claim 5, wherein the clerestory 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 half wall and the

transparent plate, and a vertical wall surface provided at an opposite side to the half wall, 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.

9. The under-stairs structure according to Claim 3, wherein a ceiling backside of the

sloped ceiling or the second partition wall includes a structure having sound proofing

properties.