JP7768535B2 - Underfloor storage type building structure - Google Patents

Description

The present invention relates to an architectural structure and a construction method. More specifically, the present invention relates to an architectural structure with underfloor storage that can be suitably used in condominiums, apartments, and other multi-family housing and row houses, and a construction method for such structures.

Condominiums, apartments, and other shared housing are common living styles for many people, including students and those working away from home.
In other words, although apartment buildings have a smaller floor area than the average, they still provide various functions and living space necessary for daily life.

Technology has been disclosed that provides storage space under the floor of living areas to make better use of space in apartment buildings (Non-Patent Document 1).

Utility Model Registration No. 3110707

The prior art discloses technology related to building structures with storage space under the floor of living areas. This prior art is useful in expanding storage space in buildings with relatively small floor space, such as rental apartments.
However, the inventors have found that the prior art has problems that make it less convenient.
In other words, in the prior art, access to the storage space was via a doorway on the side of the storage space and a drawer opening on the living room floor, meaning access was from the side and from above. This meant that there were issues with limiting the use of the storage space. Also, although the storage space could be accessed from a window, it was accessed from outside, so it was difficult to say that it was particularly convenient.

In addition, there is also the fact that the times are changing.
In recent years, working from home has become more popular, and there is now a strong demand for even rental apartments to have multiple functions in addition to the living space. As a result, there is a demand for technology that can fully utilize the limited floor space and allow for functional separation and use.

Against this background, the objective of this invention is to provide an architectural structure that provides storage space under the floor of living areas, while achieving functional separation by utilizing the storage space and expanding the usable area.

As a result of extensive research, the inventors came up with the idea of an architectural structure that has storage space under the floor of the living area, with two ascending staircases providing access to the living area, and an access section to the storage space on the side wall of the storage space near the ascending staircases.They also came up with the idea of an architectural structure that can be functionally separated by providing a small room that can be used for multiple purposes at one end of the ascending staircase, and completed the invention.
Furthermore, the inventors came up with the idea of an architectural structure that would provide access to the loft by providing an ascending staircase from the living area, and completed the invention.

The present invention comprises the following configurations.
[1] A living area with underfloor storage;
a first ascending staircase and a second ascending staircase for accessing the living space;
The first and second staircases are located on either side of the living area.
An underfloor storage type building structure characterized in that access sections for accessing the underfloor storage are provided near each of the first and second ascending staircases.

[2] An underfloor storage type building structure as described in [1] or [2], in which the second ascending staircase is connected to a small room.
[3] An architectural structure described in any one of [1] to [3], in which the first ascending staircase is connected to the entrance.
[4] An underfloor storage type building structure described in any of [1] to [3], in which the height of the lowest part of the first ascending staircase and the second ascending staircase is aligned with the height of the floor surface of the underfloor storage.
[5] An underfloor storage type building structure described in any of [1] to [4], in which the first ascending staircase and the second ascending staircase are arranged on opposite sides.

[6] In addition, a descending staircase is provided in the living area.
An underfloor storage type building structure according to any one of [1] to [5], in which the descending staircase is connected to the loft.
[7] An underfloor storage type architectural structure as described in [7], which is provided with a toilet and a unit bath at the bottom of the descending staircase or loft.
[8] An underfloor storage type building structure as described in [6] or [7], in which the loft is equipped with fall prevention equipment that can prevent falls into the living area.
[9] An underfloor storage type architectural structure as described in [8], in which the fall prevention equipment is installed in a manner that cannot be irreversibly separated from the loft floor and ceiling surfaces.
[10] An underfloor storage type architectural structure according to [9], wherein the fall prevention equipment is configured as a bookshelf.
[11] An underfloor storage type architectural structure described in any one of [1] to [10] that is installed in an apartment building or tenement house.

[12] A construction method for an underfloor storage type building structure provided in an apartment building,
A living area with underfloor storage,
a first ascending staircase and a second ascending staircase for accessing the living space;
The first and second staircases are located on opposite sides of the living area,
A construction method for an underfloor storage type building structure, characterized in that an access opening for accessing the underfloor storage is provided near each of the first and second ascending staircases.
[13] A method for constructing an underfloor storage type building structure as described in [12], in which the height of the lowest part of the first ascending staircase and the second ascending staircase is aligned with the height of the floor surface of the underfloor storage.

This invention makes it possible to provide architectural structures that have storage space under the floor of living areas, while achieving functional separation by utilizing the storage space and expanding the usable area.

Schematic diagram (plan view) of an underfloor storage type building structure. Schematic diagram of an underfloor storage type building structure (front view). 10 is a diagram (plan view) schematically illustrating a different type of underfloor storage type architectural structure. FIG. Schematic diagram (plan view) of an underfloor storage type building structure. An illustration of an apartment building that uses underfloor storage structures (perspective view from the entrance). An illustration (cross-section) of an apartment building that uses underfloor storage structures. An illustration showing the view from a small room in an apartment building that uses underfloor storage architectural structures. An illustration showing the view from the front of the living area of an apartment building that uses underfloor storage architectural structures. Design drawings (floor plan) showing an apartment building that uses underfloor storage structures.

This article explains the present invention.

<<I. Overview of the Invention>>
The underfloor storage type building structure of the present invention comprises a living area with underfloor storage, and a first staircase and a second staircase for accessing the living area, the first staircase and the second staircase being arranged on either side of the living area, and an access section for accessing the underfloor storage is provided near each of the first staircase and the second staircase.
This makes it possible to improve accessibility to the underfloor storage in building structures with underfloor storage while maintaining a compact structure. In particular, by applying underfloor storage building structures to structures with limited floor space, such as rental apartments, it is possible to make effective use of the floor space.
In addition, because the access areas are located near the first and second staircases, they are positioned on either side of the living space. This not only improves accessibility and convenience to the storage space, but also allows air to flow across the storage space, making it less susceptible to moisture buildup.
The underfloor storage type building structure of the present invention is installed as a structural building installed indoors in apartment buildings, condominiums, and other collective housing, or row houses, etc. In other words, it is used as a technology that can be applied universally by expanding and standardizing the usable area within a limited exclusive area.

In the present invention, the underfloor storage type building structure is composed of a living space, a first ascending staircase, and a second ascending staircase.
In the present invention, going up or down stairs is defined as the direction leading to a living space. That is, stairs that lead up to a living space are defined as upward stairs, and stairs that lead down to a living space are defined as downward stairs.

The living space is the part of an underfloor storage building structure that functions as a living room and has a storage space under the floor. In addition, the side wall of the storage space has an access section near the ascending stairs for accessing the underfloor storage. The living space does not need to be particularly limited as long as it has these features, and can be of various shapes and configurations.
The living space typically has a rectangular shape with a rectangular parallelepiped underfloor storage space underneath, as shown in Figures 6 and 8. However, the living space and storage space do not need to be limited to these shapes and can be of various shapes and sizes.
The access section can typically be configured as an openable door (openable door, door section) provided on the side wall of the underfloor storage section, as shown in Figure 7. However, it is not limited to this configuration, and the access section may be configured as an open entrance (open entrance section) without a door.
The access parts are located near the first and second ascending staircases. In this invention, "located near" means located close to the respective ascending staircases. As a guideline for such location, the distance between the staircases and the access parts can be 10 to 300 cm, preferably 10 to 280 cm, more preferably 10 to 260 cm, and most preferably 10 to 240 cm.

The ascending staircase is a staircase for accessing the living space, and by making it possible to secure space for an access section nearby, it facilitates the design of the access section and improves the convenience of access to the underfloor storage. Furthermore, by their very nature, two ascending staircases are provided in the living space, positioned on either side of the living space. As long as the ascending staircase has these features, it does not need to be particularly limited, and it can be of various shapes and configurations.
The ascending staircase may be provided as a direct staircase (a staircase that allows direct access to the desired location) at the end of the living area, as shown in Figure 4 or Figure 6. By providing a direct staircase, the underfloor storage type architectural structure of the present invention can be applied even in a narrow space, and it also has the effect of reducing costs.
In addition, there are two types of ascending stairs: first ascending stairs and second ascending stairs, which are used as convenient names to distinguish between ascending stairs. The same applies when the access areas near each ascending staircase are referred to as first access area and second access area.

In the underfloor storage type building structure of the present invention, it is preferable that at least the lowest part of the first ascending staircase is at the same height as the floor surface of the underfloor storage.
This aligns the height of the lowest part of the first ascending staircase with the height of the floor of the storage space, so that they are installed on essentially the same plane, which has the effect of improving the robustness of the underfloor storage type building structure of the present invention. In addition, it has the effect of simplifying the design of the building structure and reducing costs as a standardized technology.
On the other hand, like the first staircase, the second staircase is preferably flush with the floor of the underfloor storage area, but this is not necessarily required. In other words, since the second staircase connects to the small room, it can have a certain width at its lowest point. As a guideline, this height can be set to a range of typically -50 to 100 cm, preferably -40 to 100 cm, more preferably -30 to 80 cm, particularly preferably -30 to 60 cm, and most preferably -30 to 50 cm, from the floor of the underfloor storage area.
In this invention, "the height of the lowest part and the floor surface of the underfloor storage are aligned" is defined to mean that they are aligned within a reasonable range as an architectural structure, in other words, it means that as an underfloor storage type architectural structure, they are provided on essentially the same plane, and is defined as being able to tolerate some degree of deviation.

In the underfloor storage type building structure of the present invention, the first and second staircases are arranged on either side of the living space. "Arranged on either side of the living space" is defined as when the living space is considered rectangular, and the first and second staircases, or the access areas located near them, are not arranged side by side on the same side. Examples of such arrangements are shown in Figures 1 and 4.
In the present invention, it is preferable that the first and second ascending stairs are located on opposite sides. This means that the access sections near the first and second ascending stairs are also located on opposite sides, which improves access to the storage space and further enhances convenience, and also allows air to flow widely across the storage space, making it more resistant to moisture accumulation.
In this invention, "located on opposite sides" is defined as the first ascending staircase and the second ascending staircase, or the access areas located near them, being located on opposite sides when the living area is considered to be rectangular.

In the underfloor storage type building structure of the present invention, it is preferable that the second ascending staircase is connected to a small room.
This makes it possible to use the small room as a secondary room or space that is functionally separate from the living area, which has the effect of improving the value of the underfloor storage type architectural structure of the present invention or the apartment building that uses it.
The small room is typically set up as a space of a certain size at the end of a second staircase, as shown in Figure 7. Such a small room can be used as a study space for telecommuting, a storage room, or the like.

It is preferable that a shelf be installed in the small room. This makes it easier to utilize the small room as a study space and has the effect of increasing the value of the condominium using the underfloor storage architectural structure of the present invention. In particular, in today's world where working from home is necessary, it can be used as a useful shared housing with separate functions.
The shelf can typically be configured as an integral part of the side wall of the small room on the opposite side of the stairs, as shown in Figure 6. However, the shelf does not need to be limited to this configuration, and for example, although it is attached to the side wall of the small room, it may be removable, or the height position may be adjustable, or multiple shelves may be provided.

Preferably, the first staircase is connected to the entrance hall.
In other words, by configuring the side of the stairs (first stairs) different from the stairs (second stairs) connected to the small room to connect to the entrance as an entrance/exit, it has the necessary configuration for an apartment building, and has the effect of improving design efficiency and standardizing the technology when using the underfloor storage type architectural structure of the present invention.
Typically, the entrance hall is configured to be directly visible from the staircase, as shown in Figure 5, but this configuration is not required. In other words, the staircase and the entrance hall may be configured to exist in a directly or indirectly continuous space. For example, the staircase and the entrance hall may be configured to be directly visible from each other, or they may be configured to be indirectly visible through a door or other means. Even if the staircase or the entrance hall cannot be seen from the other, they may be configured to be continuous spaces that allow movement between them.

In the present invention, it is preferable that the living space is further provided with a descending staircase that is connected to the loft, which allows the living space to be used as a room or space for a second (or third) purpose different from the living space, thereby improving the value of the underfloor storage type architectural structure of the present invention.
The loft and descending staircase may typically be configured as shown in Figures 6 and 7. That is, a descending staircase may be provided on the opposite side of the second ascending staircase connected to the small room, and a loft may be provided at the end of the staircase parallel to the living area.
By providing a toilet and a unit bath below the loft, the apartment can be equipped with the minimum necessary components.

In the present invention, it is preferable that the loft is equipped with a fall prevention system that can prevent people or objects from falling into the living area. This makes it possible to prevent people or objects from falling from the loft, thereby improving the safety of the underfloor storage type building structure. In addition, the fall prevention system also serves as a screen to separate the loft from the living area.
The fall prevention equipment does not need to be particularly limited as long as it can prevent falls, and can be installed as an inseparable unit on either the floor or ceiling of the loft, or both. The fall prevention equipment can preferably be an inseparable unit on both the ceiling and the loft floor, which has the effect of improving the robustness of the underfloor storage type building structure.
Such fall prevention equipment can be configured as a handrail, a wall, a bookshelf, a closet, etc., and is preferably configured as a bookshelf.

In another aspect, the present invention can be configured as a method for constructing an underfloor storage type building structure.
That is, as a first configuration, the construction method for an underfloor storage type architectural structure of the present invention is a construction method for an underfloor storage type architectural structure characterized in that it comprises a living area with underfloor storage, and a first ascending staircase and a second ascending staircase for accessing the living area, the first ascending staircase and the second ascending staircase being arranged on either side of the living area, and an access section for accessing the underfloor storage is provided near each of the first ascending staircase and the second ascending staircase.
As a second configuration, there is provided a method for constructing an underfloor storage type building structure according to the first configuration, in which the second ascending staircase is connected to a small room.
As a third configuration, there is provided a method for constructing an architectural structure according to any one of the first to third configurations, in which the first ascending staircase is connected to the entrance.
As a fourth configuration, there is provided a method for constructing an underfloor storage type building structure described in any of the first to third configurations, in which the height of the lowest part of the first ascending staircase and the second ascending staircase is aligned with the height of the floor surface of the underfloor storage.
As a fifth configuration, there is provided a method for constructing an underfloor storage type building structure according to any one of the first to fourth configurations, in which the first ascending staircase and the second ascending staircase are arranged on opposite sides.
As a sixth configuration, a descending staircase is provided in the living area,
A method for constructing an underfloor storage type building structure according to any one of the first to fifth configurations, in which the descending staircase is connected to the loft.
As a seventh configuration, there is provided a method for constructing an underfloor storage type building structure according to the seventh configuration, in which a toilet and a unit bath are provided below the descending staircase or loft.
As an eighth configuration, there is provided a method for constructing an underfloor storage type building structure as described in the sixth or seventh configuration, in which the loft is equipped with fall prevention equipment that can prevent falls into the living area.
As a ninth configuration, there is provided a method for constructing an underfloor storage type building structure as described in the eighth configuration, in which the fall prevention equipment is irreversibly and inseparably installed on the loft floor and ceiling surfaces.
As a tenth configuration, there is provided a method for constructing an underfloor storage type architectural structure according to the ninth configuration, in which the fall prevention equipment is configured as a bookshelf.
An eleventh configuration is a method for constructing an underfloor storage type building structure described in any one of the first to tenth configurations, which is installed in an apartment building or tenement house.

<<II. Embodiment>>
The present invention will now be described with reference to the drawings.

Figure 1 is a schematic diagram of an underfloor storage type building structure, viewed from above (plan view).
The underfloor storage building structure 1 is centered around a living space 2, with a first ascending staircase 3 on one side and a second ascending staircase 3' on the other side. Furthermore, a first access section 4 and a second access section 4' are provided near each ascending staircase, and these access sections provide access to a storage section (not shown) provided under the floor.
In Figure 1, the side of the first ascending staircase 3 (upper side in Figure 1) is the back side, and the side of the second ascending staircase 3' (lower side in Figure 1) is the front side, and the same will be used in the subsequent drawings.
Such an underfloor storage type building structure can be represented as a design drawing shown in Figure 9. In Figure 9, the gray area indicates the loft that overlaps, and the bathroom area underneath is shown.

FIG. 2 is a schematic view of an underfloor storage type building structure as seen from the front side (front view).
Below the living space 2, there is a storage area 5 formed with a certain amount of space.

Figure 3 is a schematic diagram (plan view) of an underfloor storage type building structure with a loft and small rooms, viewed from above.
A small room 6 is provided on the side of the second ascending staircase 3', which can be used as a study space or the like.
In addition, a descending staircase 8 is provided on the opposite side of the second ascending staircase 3'. By ascending this descending staircase 8 from the living area 2 side, one can reach the loft 7.

FIG. 4 is another example of a schematic view (plan view) of an underfloor storage type building structure.
In each case, the first and second staircases are shown positioned on either side of a living room. Similarly, the access points (first and second access points) are also positioned on either side of a living room. The living room functions as a living room or Western-style room.

Figure 5 is a perspective view of an apartment building that uses underfloor storage type architectural structures, seen from the entrance side.
Looking from the entrance, there is a first staircase on the left side that leads to the living area, and a descending staircase (not shown) at the back of the living area that leads to the loft.

Figure 6 is a cross-sectional view of an apartment building that uses an underfloor storage type building structure, viewed from the front, Figure 7 is a view of the same building structure from a small room, and Figure 8 is a view of the same building structure from the front (front) of the living area.

There is an underfloor storage area beneath the living area, where clothes can be seen being stored. There are also doors at the front and back for access.

On the right side of the living area, a staircase leads to a small room equipped with a desk that serves as a study. Also, next to the desk in the study, there is a door that provides access to underfloor storage.

On the left side of the living area, a descending staircase leads to the loft. The loft is furnished with a bed and furniture and can be used as a bedroom with easy access from the living area.

A bathroom and toilet are located below the loft. In other words, by raising the floor of the living area with underfloor storage and deliberately installing a staircase on the left side of the living area to create a loft, it is possible to ensure a certain level of height, making it possible to install a bathroom and toilet.

Claims (5)

A living area with underfloor storage,
a first ascending staircase and a second ascending staircase for accessing the living space;
The first staircase is connected to the entrance, and the second staircase is connected to the small room, and they are located on opposite sides of the living area.
A door or an open entrance for accessing the underfloor storage is provided near each of the first and second ascending stairs,
The height of the lowest part of the first ascending staircase and the second ascending staircase is the same as the floor surface of the underfloor storage,
In addition, there is a loft with stairs leading down to the living area.
An underfloor storage type architectural structure characterized by being installed in either an apartment building or a tenement house .
2. The underfloor storage type building structure according to claim 1, wherein a toilet and a unit bath are provided below the descending staircase or the loft.
3. An underfloor storage type building structure as claimed in claim 1 or 2, wherein the loft is equipped with fall prevention equipment capable of preventing falls into the living area.
4. An underfloor storage type architectural structure according to claim 3, wherein the fall prevention equipment is provided on the loft floor surface and the ceiling surface in a manner that makes it irreversible and inseparable.
5. The underfloor storage type architectural structure according to claim 4, wherein the fall prevention equipment is configured as a bookshelf.