JPH0835340A - Detached house - Google Patents

Abstract

PURPOSE:To improve relaxed feeling and leisurely feeling of an inhabiting life and to improve comfortability, economy and a sanitary property by installing an adiabatic waterproofing floor below a floor of a first floor making a semibasement of a heat insulating waterproofing peripheral wall and the floor of the first floor, lowering a part of the floor of the first floor gradually in steps and making an underfloor extended room connected to a room on the first floor. CONSTITUTION:A housing is made highly airtight and highly insulative of heat by partitioning it from outdoor and a foundation 4 by a roof 1, an external wall 2 and a base 3. The base 3 is furnished with a heat insulating waterproofing floor 5 and an waterproofing peripheral wall 6 raised from the periphery of the heat insulating waterproofing floor 5, and a semibasement 8 is partitioned under a floor of a first floor by the heat insulating waterproofing peripheral wall 6 and the floor 7 of the first floor. Thereafter, the heat insulating waterproofing floor 5 is made to have a heat insulating property by installing an adiabatic layer 9 using a heat insulating material organic such as urethane foam, etc., or inorganic such as glass wool, etc., and is made to have a waterproofing property by installing a waterproofing layer 10 using a shaped material of a rubber sheet, etc., and an unshaped material of asphalt, etc., or a film material and a metal material. Additionally, a heat insulating layer 12 and a waterproofing layer are installed on the heat insulating waterproofing peripheral wall 6. Additionally, an underground extended room 16 or 24 connected to a room on the first floor is formed by lowering a part of a floor 15 of the first floor to the side of the semibasement 8 gradually in steps.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detached house, and more particularly, to a detached house in which comfort, economy and hygiene can be enhanced while enhancing the comfort and comfort of living. It is a thing.

[0002]

2. Description of the Related Art It is important that a detached house, which is built for people to live a family life, is constructed so as to have a feeling of relaxation or space. This feeling of relaxation and comfort is brought about by the size of the living room, ease of use, safety, hygiene, and comfort.

However, it is often difficult to secure a sufficiently large site nowadays when land prices have become expensive, and in particular where there is a strict regulation of building coverage and floor area ratio, it has a desired flat area and volume. It is difficult to secure a site for building a detached house.

Under such circumstances, it has been attempted to effectively utilize the space as much as possible within a limited plane area and volume in order to enhance the feeling of relaxation and comfort.

Therefore, the underfloor space of a detached house is particularly noticed as an object of such space utilization, and for example, a part of the floor of the living room on the first floor is lowered in a paragraph shape to provide a dug tray or a storage portion. May be provided.

[0006] Further, by placing the bathtub on a foundation formed to be lower than the floor, the height above the floor to the upper edge of the bathtub is lowered,
In some cases, it may be necessary to increase the safety of bathing for people with low motor skills such as children and victims.

[0007]

However, the above-mentioned room or equipment arranged in the underfloor portion such as the dug tray, the storage portion and the bathtub is affected by the radiant heat from the subfloor ground, the humidity and the temperature of the subfloor air and the humidity. There is a problem in that it is apt to be subject to dew condensation, dew condensation is generated, and heat retention and heating are disadvantageous.

Therefore, as an underfloor expansion chamber in which the floor of the living room is partially lowered to expand the living space of the living room on the first floor, a heating device is arranged inside like a dugout or a canned food. It is only used for the storage part of articles that have no particular problem in storability such as bottle filling.

Further, in the case of a digging kotatsu, not only the comfort is impaired due to dew condensation, rust is generated, and a failure is easily caused, but also the consumption of electric power and firewood for heating the kotatsu increases. , Is disadvantageous in improving economic efficiency.

Further, it is often found that rust is also generated in the canned or bottled lid portion due to the dew condensation caused by the temperature difference between day and night even in the storage portion of the articles.

When a part or all of the bathtub is placed under the floor, the comfort of the bath is likely to be impaired due to the decrease in the temperature of the bath, and more fuel and electric power are consumed to heat the bathtub, thus improving the economical efficiency. Will be at a disadvantage.

Further, there are problems such as decay and deterioration of the bottom wall and the peripheral wall of the dug tray and the bathtub, and the condensate causes the germs, which are the source of mold and malodor, to propagate and impair hygiene. Occurs.

The present inventor pays attention to a detached house having a high airtightness and a high heat insulating structure, and the underfloor is provided by the heat insulation and waterproofness of the floor and the peripheral wall of the semi-basement formed under the floor of the detached house. It was found that the effects of radiant heat from the ground, temperature of humidity and air under the floor and humidity can be blocked, and the above problems can be solved by effectively utilizing such underfloor structure, and the present invention has been completed. is there.

That is, the present invention has been completed in order to solve the above technical problems, and is premised on a detached house having a highly airtight and highly insulating structure, and is formed under the floor of this detached house. The insulation and waterproof properties of the floor and surrounding walls of the semi-basement block the effects of radiant heat from the ground under the floor, humidity, and the temperature and humidity of the air under the floor, increasing the comfort and comfort of living. In addition, it is an object of the present invention to provide a detached house in which comfort, safety, economy and hygiene can be improved.

[0015]

In order to achieve the above object, a detached house according to the present invention has an insulating and waterproof floor provided under the floor on the first floor over the entire flat area of the building or a part thereof, and its periphery. Insulated waterproof peripheral wall that was launched from 1 and
Form a semi-basement divided by the floor of the floor and above 1
A technical measure is taken such that a part of the floor on the first floor is lowered toward the semi-basement side in a paragraph shape to form a continuous underfloor expansion chamber on the first floor.

In the present invention, the heat-insulating and waterproof floor means a floor having heat insulating property and waterproof property. This heat insulating property is realized by providing a heat insulating layer, and waterproof property is provided with a waterproof layer. It is realized by. Furthermore, this heat-insulating and waterproof floor should have strength as a floor that can withstand use, but it does not prevent giving more strength than that,
For example, it can be used as a solid foundation for a building. In this case, a structural layer made of concrete, reinforced concrete, mortar, or the like is provided as needed to obtain the required strength as a solid foundation.

The heat insulating layer is not particularly limited as long as it is generally used as a heat insulating layer in a detached house. Specifically, for example, an organic or inorganic heat insulating material or a combination thereof is used. Can be used.

Examples of the above-mentioned inorganic heat insulating material include glass wool, rock wool, ceramic fiber, pearlite plate, calcium silicate plate, foam glass plate and lightweight cellular concrete plate. Examples of the organic heat insulating material include soft fiberboard made of plant fiber, carbonized cork, polystyrene foam, hard urethane foam, polyethylene foam, urea resin foam, and phenol resin foam.

Among these, it is recommended to use a rigid urethane foam, particularly a urethane board formed into a board shape, which is easy to install and has a high degree of heat insulation.

As the above-mentioned waterproof layer, a fixed material (sheet) represented by a rubber sheet, an amorphous material represented by asphalt, a coating material, and a metal sheet are used. , And those using two or more of these in combination.

Among these, it is recommended to use a regular material (sheet) which is easy to construct and can obtain a high degree of waterproofness.

The heat-insulating and waterproof floor is not particularly limited, but it is preferable to make it as wide as possible in order to reduce changes in temperature and humidity of the underfloor space used, and from this viewpoint, it is provided over the entire plane of the building. preferable.

Further, in the present invention, the heat-insulating and waterproof peripheral wall means
It is a peripheral wall having heat insulating properties and waterproof properties. This heat insulating property is realized by providing a heat insulating layer, and waterproof property is realized by providing a waterproof layer. Furthermore, this heat-insulating and waterproof peripheral wall needs to have strength as a partition wall, but it does not prevent any further increase in strength. That is, this heat-insulating and waterproof peripheral wall can also be used as a cloth foundation, and in this case, a structural layer made of concrete, reinforced concrete, mortar, or the like is provided as necessary to obtain the required strength as the cloth foundation.

Further, since the effect of moisture from the ground is small on the above-ground portion of the heat-insulating waterproof peripheral wall, it does not require a high degree of waterproofness unlike the heat-insulating waterproof floor, and it is, for example, a concrete wall or a reinforced concrete wall. It should be waterproof.

In the present invention, the floor on the first floor does not particularly require heat insulation or waterproofness and may have a general floor structure, but it is free to add a heat insulating layer or a waterproof layer. .

In the present invention, the term "semi-basement" is not particularly limited as long as it is formed under the floor on the first floor and the lower surface of the heat-insulating and waterproof floor is located below the ground surface. The height from the upper surface of the waterproof floor to the ground surface is less than one-third of the height from the upper surface of the heat-insulating waterproof floor to the lower surface of the floor on the first floor, and the height from the upper surface of the heat-insulating waterproof floor to the floor on the first floor. A chamber whose height to the lower surface is lower than 1600 mm is desirable.

In the present invention, a part of the floor on the first floor is lowered in a paragraph form in this semi-basement to form an underfloor expansion chamber continuous to the room on the first floor. The use of the room on the first floor where the underfloor expansion room is formed is not particularly limited, and it is a living room, that is, a space used for daily life, a tea room, a bedroom, a guest room, a reception room, a study room, a maid room, a bathroom, It can also be provided in a laundry room or the like.

In the present invention, when a bathroom is provided on the first floor, an underfloor expansion chamber is provided in a part of the bathroom on the first floor, and the lower part or the whole of the bathtub is inserted into this underfloor expansion chamber. Since the height above the floor to the edge can be lowered,
This is extremely beneficial as it can increase the safety of bathing for people with low motor skills such as old people, children, and injured persons.

Further, according to the present invention, if an underfloor expansion chamber is provided in a part of the laundry room on the first floor, and the lower part of the washing machine is inserted into this underfloor expansion chamber, the falling part of the laundry room can be used. In addition, since water does not flow to the floor surface when the water is drained and the floor surface is not polluted, and the washing can be performed in a comfortable posture, fatigue can be prevented.

When an underfloor expansion room is provided in the living room, in order to expand the living space on the first floor or more, it is formed in a dead space inside the underfloor expansion room or an article storage section that projects from the underfloor expansion room to the semi-underground room. It is possible to provide an article storage.

[0031]

In the detached house of the present invention, the heat-insulating waterproof floor provided under the floor on the first floor over the entire flat area of the building or a part thereof, the heat-insulating waterproof peripheral wall raised from the periphery of the floor, and the floor on the first floor A semi-basement defined by and is formed.

Since this semi-basement is partitioned from the outdoor space or the underfloor space communicating with the outdoor space by the heat-insulating waterproof floor and the heat-insulating waterproof peripheral wall, there is a risk of being affected by the humidity and heat of the ground or the outside air. Absent.

Therefore, the underfloor expansion chamber, which is formed by lowering a part of the floor on the first floor in a paragraph shape in this semi-basement, and which communicates with the room on the first floor, may be affected by the humidity and heat of the ground and the outside air. In addition to the elimination of dew, it becomes difficult to generate dew condensation, and in addition to the heat insulation effect of the heat-insulating waterproof floor and the heat-insulating waterproof peripheral wall, it is highly insulated from the ground and the outside air by the heat insulating effect of the air in the semi-cement room.

Further, by effectively using the underfloor space on the first floor in this manner, the living space on the first floor and above can be effectively used widely, and a comfortable and comfortable living life can be achieved. .

[0035]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings, but the present invention is not limited to this embodiment.

A detached house according to an embodiment of the present invention shown in the cross-sectional view of FIG. 1 is a highly airtight and highly heat-insulated detached house which is partitioned from the ground 1 by the roof 1, the outer wall 2 and the foundation 3. This is a house, and this foundation 3 is provided with a heat insulating and waterproof floor 5 and a heat insulating and waterproof peripheral wall 6 raised from the peripheral edge thereof. And these heat-insulating waterproof floor 5, heat-insulating waterproof peripheral wall 6 and floor 7 on the first floor
A semi-basement 8 is defined under the floor on the first floor.

The above-mentioned heat-insulating and waterproof floor 5 is a floor having heat-insulating and waterproof properties, and as shown in the sectional view of FIG. 2, this heat-insulating property is realized by providing a heat-insulating layer 9. Further, the waterproof property is realized by providing the waterproof layer 10.

Further, the heat-insulating and waterproof floor 5 is only required to have strength as a floor that can withstand use, but it does not prevent any further increase in strength, and here, it is also used as a solid foundation of a building. Therefore, in order to obtain the required strength as a solid foundation, the structural layer 11 made of reinforced concrete (concrete, mortar, etc. may be used), if necessary.
Is provided.

As the heat insulating layer 9, an organic or inorganic heat insulating material generally used as a heat insulating layer in a detached house can be used. Examples of the inorganic heat insulating material include glass wool, rock wool, ceramic fiber, pearlite plate, calcium silicate, foam glass, and lightweight cellular concrete. Also, as the organic heat insulating material, a soft fiberboard made of plant fiber,
Examples thereof include carbonized cork, polystyrene foam, rigid urethane foam, polyethylene foam, urea resin foam and phenol resin foam.

In this embodiment, a hard urethane foam which is easy to install and has a high degree of heat insulating property, particularly a urethane board molded into a board shape is used as the heat insulating layer 9.

In this embodiment, the heat insulating layer 9 is arranged on the upper side of the structure layer 11, but the heat insulating layer may be arranged on the lower side of the structure layer 11.

As the waterproof layer 10, a regular (sheet) material typified by a rubber sheet, an amorphous material typified by asphalt, a coating material, or a metal sheet is used. Some of them are used, and some of them are used in combination.

In this embodiment, a regular material (so-called waterproof sheet) that is easy to install and can obtain a high degree of waterproofness.
Is used.

In this embodiment, the waterproof layer 10 is arranged on the upper side of the heat insulating layer 9.
May be disposed between the structure layer 11 and the structure layer 11 or below the structure layer 11.

The heat-insulating waterproof floor 5 is not particularly limited, but it is preferable to make it as wide as possible in order to reduce changes in temperature and humidity of the underfloor space to be used. In this embodiment, from this point of view. It is provided over the entire plane of the building.

The heat insulating and waterproof peripheral wall 6 is a peripheral wall having heat insulating properties and waterproof properties. This heat insulating property is realized by providing the heat insulating layer 12, and the waterproof property is provided by the waterproof layer. It is realized by

Further, the heat-insulating waterproof peripheral wall 6 is required to have strength as a partition wall, but it does not hinder to give more strength. In this embodiment, the heat-insulating waterproof peripheral wall 6 is covered with cloth. Since it is also used as a foundation, a structural layer 13 made of reinforced concrete (concrete, mortar or the like may be used) is provided as necessary to obtain the required strength as a cloth foundation.

Since the influence of moisture from the ground 4 is small on the above-ground portion of the heat-insulating waterproof peripheral wall 6, the heat-insulating waterproof floor 5 is used.
It does not require a high degree of waterproofness as described above, but may be waterproof to the extent that a concrete wall or a reinforced concrete wall has, for example. Therefore, the heat insulating and waterproof peripheral wall 6 of this embodiment is used.
The structure layer 13 also serves as a waterproof layer, the heat insulating layer 12 and the structure layer 13 are provided, and an exterior material layer 43 made of mortar is provided in order to enhance the appearance.

The structure of the heat insulating layer 12 is the same as that of the heat insulating layer 9 of the heat insulating and waterproof floor 5, and the detailed description thereof will be omitted to avoid duplication.

The floor 7 on the first floor does not need heat insulation or waterproofness and may have a general floor structure, but it is free to add a heat insulation layer or a waterproof layer.

In this embodiment, the semi-basement 8
Is formed under the floor of the first floor, the lower surface of the heat-insulating waterproof floor 5 is located below the ground surface, and the height from the upper surface of the heat-insulating waterproof floor 5 to the ground surface is from the upper surface of the heat-insulating waterproof floor to the first floor. It is smaller than 1/3 of the height to the bottom surface of the floor 7, and the height from the top surface of the heat and waterproof floor 5 to the bottom surface of the floor 7 on the first floor is 1600 mm.
It is formed in the lower chamber.

As shown in FIG. 1, a part of the floor 15 of the bathroom 14 provided in this detached house is stepped down into the semi-basement 8 so that an underfloor expansion chamber 16 continuous to the bathroom 14 is formed. By forming the bathtub 17 from the underfloor expansion chamber 16 to the bathroom 14, the height from the floor 15 of the bathroom 14 to the edge of the bathtub 17 is lowered.

As a result, even persons with low exercise ability such as old people, children, and injured persons can safely enter and leave the bathtub 17.

Further, in order to prevent high-humidity and high-temperature air from flowing out of the bathroom 14 to other parts of the room, a heat insulating and waterproof layer is provided on the floor 15, bathtub 17, wall 18 and ceiling 19 of the bathroom 14. 20 are provided.

Since the semi-basement 8 is partitioned from the outdoor space (or the underfloor space communicating with the outdoor space) by the heat-insulating and waterproof floor 5 and the heat-insulating and waterproof peripheral wall 6, the soil 4 and the humidity and heat of the outside air. There is no fear of being affected by.

Therefore, the underfloor expansion chamber 16 formed in this semi-basement 8 is also free from the influence of the moisture and heat of the ground 4 and the outside air, and is less likely to cause dew condensation. In addition to the heat insulation effect of the peripheral wall 6, the heat insulation effect of the air in the semi-basement 8 provides high heat insulation from the ground 4 and the outside air.

As a result, the bath water in the bathtub 17 is in the semi-basement 8
It is difficult to cool the bath due to the air inside the bath, which prevents the bather from feeling uncomfortable due to the decrease in hot water temperature, which improves comfort and reduces the consumption of fuel and electricity to heat the hot water. It can be done and the economy can be improved.

Particularly, here, since the heat insulating layer 20 is provided also in the bathtub 17, the heat insulating effect of this heat insulating layer 20 causes
Comfort and economy are further enhanced.

Further, as a result, dew condensation is less likely to occur, so that molds and bacteria are less likely to propagate in the underfloor expansion chamber 11 and under the floor, and decay and foul odors due to bacterial proliferation are prevented. As a result, the durability of the underfloor expansion chamber 11 can be enhanced and the hygiene can be enhanced.

As shown in FIG. 1, a part of the floor 22 of the washing room 21 provided in this detached house is lowered into the semi-basement 8 corresponding to the washing machine 23, the dryer, etc. hand,
An underfloor expansion chamber 24 is provided. For example, this underfloor expansion room 2
4. By arranging the washing machine 23 in 4, the height of the bottom of the washing tub of the washing machine 23 is arranged at the same level as the floor 22, and the height of the upper edge of the washing tub from the floor 22 is lowered. Since it is possible to prevent water from overflowing to the floor 22 when draining,
Moreover, there is no need to lift the laundry high, and it is easy to wash.

Further, in the case of a laundry system in which a dryer is set on the washing machine 23, since the position of the dryer is lowered, it is easy to put the laundry in and out of the washing machine 23, and the laundry is further washed. You can do it easily.

Further, the semi-basement 8 has a heat-insulating and waterproof floor 5
Since it is partitioned from the outdoor space (or the underfloor space that communicates with the outdoor space) by the heat-insulating and waterproof peripheral wall 6, there is no risk of being affected by the humidity and heat of the ground 4 and the outside air. The inside of the provided underfloor expansion chamber 24 is also ground 4.
It is not affected by the humidity and heat of outside air.

As a result, it is possible to prevent dew condensation on the washing machine 23, and prevent the washing machine 23 from rusting or malfunctioning, preventing the durability of the washing machine 23 from deteriorating and preventing the growth of mold and bacteria. It is possible to improve hygiene.

As shown in the sectional view of FIG. 3, a Japanese-style room 25 is provided in this detached house, and a part of the floor 26 is lowered by one step to provide an underfloor expanded space 27 with a dugout. .

Since the underfloor space 27 is provided in the semi-basement 8 which is separated from the outdoor space (or the underfloor space communicating with the outdoor space) by the heat-insulating and waterproof floor 5 and the heat-insulating and waterproof peripheral wall 6, the ground is provided. There is no fear of being affected by the humidity and heat of the outside air, and it is possible to prevent the dew condensation inside and outside the underfloor expansion chamber 27, prevent the underfloor expansion chamber 27 from decaying, and enhance its durability, and hygiene. The nature is enhanced.

Further, in addition to the heat insulating effect of the heat insulating waterproof floor 5 and the heat insulating waterproof peripheral wall 6, since the air in the semi-underground room 8 is highly insulated from the ground 4 and the outside air, it has a high heat retaining property and a dug It is possible to improve the economic efficiency by reducing the consumption of firewood charcoal and electricity for heating.

As shown in FIG. 4, a living room 28 is further provided in this detached house, and a floor 29 is provided.
A discourse room called a family corner is provided as an underfloor expansion room 30 by lowering a part of the room.

A pair of sofas 31 and 32 are provided facing each other on the wall of the underfloor expansion chamber 30, and the back support 33 of one of the sofas 31 extends from the underfloor expansion chamber 30 into the semi-basement 8. Drawer 35 that is put in and taken out of the storage portion 34
It is also used for the front plate. Also, the seat 3 of this sofa 31
On the lower side of 6, there is provided another storage portion 37 and a drawer 38 which is inserted into and removed from the storage portion 37.

A storage portion 40 is also provided under the seat portion 39 of the other sofa 32, and the storage portion 40 is constructed so that articles can be taken in and out by opening the seat portion 39 upward.

A drawer-type storage portion 42 is provided on the wall 41 on which the sofas 31 and 32 are not placed.

The underfloor expansion chamber 30 includes an insulating and waterproof floor 5,
Semi-basement 8 divided from outdoor space (or underfloor space communicating with outdoor space) by heat-insulating and waterproof peripheral wall 6
Since it is provided inside, there is no risk of being affected by the moisture and heat of the ground 4 and the outside air, and it is possible to prevent dew condensation inside and outside of the underfloor expansion chamber 30, which enhances the comfort of the user and the mold caused by dew condensation. The growth of bacteria and bacteria is prevented, the underfloor expansion chamber 27 is prevented from decaying, its durability is enhanced, and hygiene is enhanced.

Moreover, since the air-conditioning environment of the underfloor expansion room 30 is continuous with the living room 28 on the first floor, the same air-conditioning environment as the living room 28 is provided, and the indoor space where a comfortable life can be lived is expanded. Can increase the feeling of relaxation or comfort.

Particularly, here, since the storage portions 34 and 42 projecting into the semi-basement room around the underfloor expansion chamber 30 and the storage portions 37 and 40 in the dead space in the underfloor expansion chamber 30 are provided, the semi-basement 8 The utilization rate of the inner space is high, and it is possible to further expand the living space on the first floor and above, and to further enhance the feeling of relaxation or comfort.

By the way, reference numeral 44 is an underfloor electric water heater. In this case, the underfloor electric water heater 44 is used to supply hot water to the kitchen, bathtub 17, washroom, and laundry.

[0075]

As described above, the detached house of the present invention has an underfloor in a semi-basement defined by an outdoor space or an underfloor space communicating with the outdoor space by an insulating waterproof floor and an insulating waterproof peripheral wall. Since the expansion chamber is provided, it is possible to eliminate the influence of the humidity and temperature of the ground and outdoor air on the underfloor expansion chamber due to the heat insulation and waterproof property of the heat insulating and waterproof floor and the heat insulating and waterproof peripheral wall.

As a result, it is possible to prevent dew condensation in and out of the underfloor expansion chamber, so that mold and bacteria due to dew condensation are prevented from propagating, and the underfloor expansion chamber or equipment installed in the underfloor expansion chamber is rotted or has a bad odor. It is possible to prevent the occurrence of the like, and to improve comfort and hygiene.

Further, since the influence of the humidity and temperature of the ground and outdoor air on the underfloor expansion chamber can be eliminated, the heat retention of the underfloor expansion chamber can be improved, and bath water, kotatsu heating, air conditioning of the underfloor expansion chamber, etc. Fuel and electricity consumed can be reduced, and economic efficiency can be improved.

In addition, by expanding the living space on the first floor under the floor, a comfortable living space similar to that on the first floor can be expanded, so that a feeling of relaxation or a comfortable living can be enhanced. can get.

In the present invention, particularly when an underfloor expansion room is provided in the living room on the first floor, a comfortable living space similar to that of the living room on the first floor can be expanded, so that a feeling of relaxation or comfort in living can be enhanced. It is possible to obtain such effects as

When an underfloor expansion room is provided in the living room on the first floor, an article storage part that extends from this underfloor expansion room to a semi-basement is formed, or an article storage part is provided in a dead space in this underfloor expansion room. When it is formed, the effective utilization rate of the space in the semi-basement can be increased, and the living space on the first floor or more can be further expanded, so that an effect of further enhancing the feeling of relaxation or comfort of the living life can be obtained.

Further, in the present invention, when the underfloor expansion chamber is provided especially in the laundry room on the first floor and the washing machine is arranged in this underfloor expansion chamber, the height of the edge of the washing tub of the washing machine from the floor. The height of the laundry can be lowered, the floor will not be contaminated by water when drained, and the height for lifting the laundry will be low, which will make it easier to put the laundry in and out of the washing tub. To be

In addition, in the present invention, when an underfloor expansion chamber is provided in a part of the bathroom on the first floor and a bathtub is arranged in this underfloor expansion chamber, the height from the washing room to the edge of the bathtub is lowered, It is possible for people with low exercise ability such as old people, children, and injured people to easily enter and leave the bathtub, and to improve safety.

[Brief description of drawings]

FIG. 1 is a sectional view of a bathroom and a laundry room according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the foundation of one embodiment of the present invention.

FIG. 3 is an explanatory diagram of a Japanese-style room according to an embodiment of the present invention.

FIG. 4 is an explanatory diagram of a living room according to an embodiment of the present invention.

[Explanation of symbols]

 5 Heat-insulating waterproof floor 6 Heat-insulating waterproof peripheral wall 7 Floor on the first floor 8 Semi-basement 14 Bathroom 15 Floor 16 Underfloor expansion room 17 Bathtub 21 Laundry room 22 Floor 23 Washing machine 24 Underfloor expansion room

Claims (6)

[Claims] 1. A heat-insulating waterproof floor provided under the floor on the first floor over the entire flat area of the building or a part thereof, a heat-insulating waterproof peripheral wall raised from the periphery, and a semi-basement defined by the floor on the first floor. A detached house, characterized in that a part of the floor on the first floor is lowered to the semi-basement side in a paragraph shape to form an underfloor expansion chamber continuous to the room on the first floor. 2. The detached house according to claim 1, wherein an underfloor expansion chamber is provided in a part of the bathroom on the first floor, and the lower part or the whole of the bathtub is inserted into this underfloor expansion chamber. 3. The detached house according to claim 1, wherein an underfloor expansion chamber is provided in a part of the laundry room on the first floor, and the lower part of the washing machine is inserted into the underfloor expansion chamber. 4. The detached house according to claim 1, wherein an underfloor expansion chamber is provided in the living room on the first floor. 5. The detached house according to claim 4, wherein an article storage section is formed so as to extend from the underfloor expansion chamber to a semi-basement. 6. The detached house according to claim 4, wherein an article storage section is formed in a dead space in the underfloor expansion room.