JP7134935B2 - Installation method of foundation inspection door and building structure - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for installing a foundation inspection door of a building and a building structure.

BACKGROUND ART In recent years, amid growing interest in energy conservation in houses, in order to improve the insulation performance of bathroom compartments and the like, a heat insulating material is provided all around the inner surface of a foundation that partitions an underfloor part of a bathroom or the like. However, it is necessary to provide an opening (passage or inspection opening) in the foundation for inspecting the underfloor, and insulation cannot be provided in the opening.

Therefore, in order to cut off the ventilation through the opening provided in the foundation and to achieve heat insulation, a basic inspection opening has been proposed in which a heat-insulating cover can be attached to and detached from the opening of the frame fixed to the opening in the foundation. (See Patent Document 1, for example).

Utility Model Registration No. 3078345

However, in the basic inspection opening described in Patent Document 1, the frame of the basic inspection opening is arranged in a mold and embedded in the foundation. In such a foundation inspection opening, it is necessary to position the frame of the foundation inspection opening in advance in the formwork and then pour foundation concrete to form the foundation. A problem arises that the foundation access door cannot be easily attached to the foundation. Currently, there are no known retrofit type foundation access doors that are installed after the foundation is formed.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a method for installing a foundation inspection door and a building structure capable of enhancing the underfloor insulation performance in a retrofit type foundation inspection door.

A method for installing a foundation inspection door according to the present invention includes a foundation forming step of forming an opening extending over the entire top and bottom of a rising portion of a foundation defining a lower space of a bathroom to form the foundation; and a filling step of filling foamed synthetic resin between the opening of the foundation and the frame , wherein the frame protrudes from the outer peripheral side surface. In the frame arranging step, the flange of the frame faces the outer opening peripheral edge of the space below the bathroom of the foundation, and in the filling step, the bathroom The foamed synthetic resin is filled between the opening inner surface of the foundation and the frame from the lower space side of the base .

According to this, the underfloor insulation performance can be improved in the retrofit type basic inspection opening. Also, it becomes possible to attach a foundation inspection opening to the opening formed during foundation formation. Therefore, it is not necessary to embed the frame of the foundation inspection opening into the foundation when forming the foundation, and the foundation inspection opening can be easily attached to the foundation. In addition, in the frame arranging step, since the flange of the frame faces the peripheral edge of the opening of the foundation, the permissible range of the opening dimension of the foundation is widened and the opening can be easily formed in the foundation.

In the present invention, the frame has a heat insulator covering the entire outer peripheral side surface of the frame body, and in the filling step, the foam synthesis is performed between the heat insulator and the inner surface of the opening of the foundation. Filling with resin is preferable.
Moreover, in the present invention, it is preferable to further include a heat insulating material installing step of providing a heat insulating material on the inner surface of the foundation before the filling step. As a result, the heat insulating material of the frame and the heat insulating material of the foundation can be continuously connected with the foamed synthetic resin, and the heat insulating performance can be improved.

Moreover, in the present invention, it is preferable to further include a lid mounting step of mounting a heat-insulating lid on the frame so as to close the opening of the frame after the frame arranging step .

Further, in the present invention, unevenness is formed on a surface of the flange facing the base, and in the filling step, the foamed synthetic resin is filled between the facing surface of the flange and the base. preferably. Thereby, the frame can be effectively adhered to the foundation.

The building structure of the present invention includes a foundation defining a lower space of a bathroom with an opening, a frame mounted in the opening and having an opening inside the opening, and a frame capable of fitting into the opening. a foundation inspection opening having a cover, wherein the frame has a flange formed so as to protrude from the outer peripheral side surface, and the flange extends from the space below the bathroom of the foundation. After the base is formed, it is mounted in the opening so as to face the outer peripheral edge of the opening, and foamed synthetic resin is filled between the flange, the opening, and the outer peripheral side surface.

According to this, the underfloor insulation performance can be improved in the retrofit type basic inspection opening.

Moreover, in the present invention, it is preferable that a foundation is further provided on the foundation and the foundation inspection opening, and the foamed synthetic resin is also filled between the foundation and the frame. This further improves the heat insulation.

In another aspect, the building structure of the present invention comprises a foundation defining a lower space of a bathroom in which an opening with an upper side is formed; A building structure comprising a frame having an opening inside and a foundation inspection opening having a lid capable of fitting into the opening, the building structure being arranged on the foundation and the foundation inspection opening a base, a base packing disposed between the base and the base except between the frame and the base, between the frame and the base and between the frame and the opening and a foamed synthetic resin filled in.
According to this, the underfloor insulation performance can be improved in the retrofit type basic inspection opening.

Further, in the present invention, a heat insulating material is further provided so as to cover one side surface of the foundation, and the foamed synthetic resin is also filled between the frame and the heat insulating material. preferable. As a result, the underfloor insulation performance can be effectively improved in the retrofit type basic inspection opening.

Further, in the present invention, it is preferable that a plurality of irregularities are formed on a surface of the flange facing the opening peripheral edge of the base. This increases the bonding area between the flange and the foamed synthetic resin, so that the frame can be effectively bonded to the foundation after the foundation is formed.

According to the installation method of the foundation inspection door and the building structure of the present invention, the underfloor insulation performance can be enhanced in the retrofit type foundation inspection door.

1 is a partial perspective view of a building structure fitted with a foundation inspection door according to one embodiment of the present invention; FIG. (a) is a front view of the building structure shown in FIG. 1, and (b) is a plan view of the building structure shown in FIG. FIG. 3 is a cross-sectional view taken along line III-III of FIG. 2(a); (a) is a perspective view of the frame shown in FIG. 1, and (b) is an exploded perspective view of the frame. FIG. 2 is a front view of the frame shown in FIG. 1; (a) is a perspective view of the lid shown in FIG. 1, and (b) is a perspective view when the lid shown in FIG. 6 (a) is viewed from the opposite side. (a) is a perspective view of the foundation shown in FIG. 1, and (b) is a perspective view showing a state in which a foundation inspection opening is attached to the opening of the foundation.

A building structure 100 having a basic inspection opening 100 according to an embodiment of the present invention will be described below with reference to FIG.

As shown in FIGS. 1 and 2, the building structure 100 in this embodiment includes a foundation 1 (for example, continuous foundation) elongated in the longitudinal direction A and an opening 2 formed in the foundation 1 (FIG. 7A). Reference), the foundation inspection opening 10 used attached to the foundation 1 and the foundation 3 arranged on the foundation inspection opening 10, a plurality of foundation packings 4 arranged between the foundation 3 and the foundation 1, and the opening 2 and foamed synthetic resin 5 filled between the base 3 and the frame 11 of the basic inspection opening 10 . In addition, the building structure 100 shown in FIG. 1 shows a part of the foundation structure that defines the lower space of the bathroom using the unit bath, and the width direction B of the rising portion 1b of the foundation 1 (the direction orthogonal to the longitudinal direction A) ), the left side of the rising portion 1b in the figure is the inner side, and the right side is the outer side. Therefore, in the following description, one side of the width direction B may be referred to as the outer side, and the other side as the inner side.

The base 1 is composed of a footing 1a and a rising portion 1b erected upward from the footing 1a. The base 3 and the base packing 4 are fixed on the raised portion 1b by anchor bolts, square washers and nuts (none of which are shown) implanted in the base 1. As shown in FIG. A heat insulating material 6 is provided on the entire inner surface 1c of the rising portion 1b. Note that the heat insulating material 6 may be provided on the outer side surface 1d of the rising portion 1b. In addition, as shown in FIG. 7(a), the rising portion 1b is formed with an opening 2 that is cut off in the middle of the longitudinal direction A, so that the rising portions 1b are separated from each other in the longitudinal direction A. is divided into

The basic inspection door 10 has a frame 11 and a lid 21, as shown in FIGS. As shown in FIGS. 3 and 4, the frame 11 has a frame main body 12 that can be placed in the opening 2 of the foundation 1, a flange 13, and a heat insulator . As shown in FIGS. 2 to 4, the frame main body 12 has a rectangular tubular shape, and the width in the longitudinal direction A and the height in the vertical direction C are slightly smaller than the opening 2 . Further, as shown in FIG. 7B, the frame body 12 has an opening 15 radially inward of the opening 2 when placed in the opening 2 . The opening direction of the opening 15 is parallel to the width direction B of the rising portion 1 b of the foundation 1 .

The frame body 12 is made of synthetic resin, and has an inner peripheral surface 16 forming an opening 15, as shown in FIG. The opening 15 is configured such that a first opening 15a and a second opening 15b communicate with each other. The second opening 15 b is arranged inside the first opening 15 a along the width direction B and has an opening diameter slightly smaller than that of the first opening 15 .

As shown in FIGS. 4 and 5, the inner peripheral surface 16 includes a first inner peripheral surface 16a that forms the first opening 15a, a second inner peripheral surface 16b that forms the second opening 15b, and a first inner peripheral surface 16b that forms the second opening 15b. It has a step surface 16c connecting the inner peripheral surface 16a and the second inner peripheral surface 16b. The stepped surface 16c is a surface erected so as to face the width direction B, and is formed in an inverted U shape as shown in FIG. The first inner peripheral surface 16a and the second inner peripheral surface 16b are continuously connected along the width direction B at their lower surface portions.

A packing 19 made of an elastic material such as rubber is attached to the inner peripheral surface 16, as shown in FIG. The packing 19 is composed of a first packing 19a and a second packing 19b. The first packing 19a is continuously attached to an upper portion extending along the longitudinal direction A of the step surface 16c and two left and right portions extending along the vertical direction C, and has an inverted U shape. The second packing 19b is attached to the lower surface 16a1 and extends along the longitudinal direction A. As shown in FIG. Both ends of the second packing 19b in the longitudinal direction A are arranged near both ends of the first packing 19a. By providing such a packing 19, when the opening 15 is closed with the lid 21, the gap between the lid 21 and the frame 11 is substantially entirely filled in the circumferential direction. . This further improves the airtightness between the frame 11 and the lid 21 . When the lid 21 closes the opening 15 of the frame 11, the first packing 19a is provided on the surface facing the step surface 16c of the lid 21, and the second packing 19b is provided on the lower surface 21a of the lid 21. may be provided in Also, the packing 19 may be provided on both the frame 11 and the lid 21 . In these cases as well, the airtightness between the frame 11 and the lid 21 is further improved.

The frame main body 12 includes, as shown in FIG. 4, two concave portions (first engaging portions) 17 formed in a lower surface 16a1 of the first inner peripheral surface 16a, and as shown in FIG. and a convex portion (second engaging portion) 18 formed on the upper surface 16a2 of the peripheral surface 16a. The two recesses 17 are arranged near both ends in the longitudinal direction A of the lower surface 16a1 and open upward. That is, the two recesses 17 are arranged apart from each other along the longitudinal direction A (extending direction of the foundation 1). The convex portion 18 is formed so as to protrude downward from the upper surface 16a2 and extend along the longitudinal direction A, as shown in FIGS. Further, the convex portion 18 is arranged in the center of the upper surface 16a2 with respect to the longitudinal direction A. As shown in FIG. That is, the projection 18 is arranged in the center of the opening 15 with respect to the longitudinal direction A. As shown in FIG.

A plurality of ribs 12b are formed on the outer peripheral side surface 12a of the frame body 12, as shown in FIG. 4(b). Thereby, the strength of the frame main body 12 is improved.

The flange 13 is made of synthetic resin, and as shown in FIG. formed. The flange 13 in this embodiment has an inverted U shape and is formed integrally with the upper side and the left and right sides of the frame main body 12 . The flanges 13 may be formed, for example, in an annular shape, a U-shape, or formed on the left and right sides of the frame main body 12 according to the shape of the opening 2, and these may be formed continuously or discontinuously. , can be changed as appropriate. Further, the flange 13 may be formed in the middle of the width direction B of the frame main body 12 .

In addition, as shown in FIGS. 1 to 3, the flange 13 has a size that can face the peripheral portion of the opening 2 at the rising portion 1b of the foundation 1 when the frame body 12 is arranged in the opening 2. is formed in As shown in FIG. 4(b), the flange 13 has a plurality of ribs 13b formed on a facing surface 13a facing the rising portion 1b. Thereby, the strength of the flange 13 is improved. A convex portion 13c extending in an inverted U shape is formed on the facing surface 13a. The convex portion 13c is formed by denting the surface of the flange 13 opposite to the facing surface 13a to partially protrude the facing surface 13a. A tip end surface 13d of the convex portion 13c has a width larger than that of the tip end surface of the rib 13b. Further, the tip surface 13d of the projection 13c and the tip surface of the rib 13b are arranged substantially in the same plane. Therefore, when the frame 11 is attached to the opening 2, the tip surface 13d of the projection 13c and the tip surface of the rib 13b can be brought into contact with the rising portion 1b, so that the frame 11 can be stably arranged in the opening 2. can be made Also, at this time, when a temporary fixing adhesive is applied to the portion of the rising portion 1b facing the flange 13, the tip surface 13d is formed wider than the rib 13b, so that the frame 11 is attached to the base 1. can be effectively adhered. Furthermore, since a plurality of ribs 13b are formed on the facing surface 13a, the bonding area with the temporary fixing adhesive is increased. Therefore, the frame 11 can be more effectively adhered to the base 11 .

The heat insulator 14 is made of foamed synthetic resin (for example, foamed polystyrene), and is shaped like a square tube as shown in FIG. In addition, the heat insulator 14 is attached to the outer peripheral side surface 12a of the frame main body 12, and extends over the entire upper surface of the outer peripheral side surface 12a and the other end (inner end) of the outer peripheral side surface 12a in the width direction B. covering. Thereby, it becomes possible to improve the heat insulating property of the basic inspection opening 10 . Therefore, the underfloor insulation performance can be enhanced in the retrofit type basic inspection door 10 . Furthermore, since the heat insulator 14 is attached to the outer peripheral side surface 12a of the frame body 12 so that the ribs 12b of the left and right outer peripheral side surfaces 12a of the frame body 12 are exposed, the frame body 11 is attached to the opening 2 of the foundation 1 and then the frame body is mounted. Adhesion to the foamed synthetic resin 5 filling the gap between 11 and opening 2 can be improved.

The lid 21 is made of foamed synthetic resin (for example, foamed polystyrene) and has heat insulation. 1 to 3, the lid body 21 is formed in a substantially square plate shape that can be fitted into the opening 15. As shown in FIGS. As shown in FIG. 6A, the lid body 21 has two projections (first engaged portions) 22 projecting downward from the lower surface 21a. These two protrusions 22 are shaped and positioned to fit and engage with the two recesses 17 when the lid 21 is placed in the opening 15 . That is, the two protrusions 22 are also arranged apart from each other along the longitudinal direction A. As shown in FIG.

As shown in FIGS. 1 to 3, the lid 21 has a grip portion 23 protruding from an outer surface 21c that is exposed to the outside when the lid 21 is attached to the frame 11. As shown in FIG. As shown in FIG. 6A, the grip portion 23 is arranged slightly below the upper end of the lid 21 and in the center in the longitudinal direction A, and extends along the longitudinal direction A. As shown in FIG.

At the upper end of the lid 21, the two protrusions 22 of the lid 21 are fitted into the two recesses 17, and the upper end of the lid 21 is pushed inward along the width direction B to form a frame. A locking member 25 is provided for engaging the projection 18 of the body 11 to lock the lid 21 . The lock member 25 is made of synthetic resin and arranged in the center of the lid body 21 in the longitudinal direction A. As shown in FIG. The lock member 25 includes an attachment portion 26 attached to the upper end of the lid 21, an elastic support portion 27 bent and extending from the attachment portion 26, and a convex portion formed at the tip of the corner of the elastic support portion 27. (Second engaged portion) 28 .

As shown in FIG. 6( a ), the elastic support portion 27 extends outward along the width direction B from the mounting portion 26 above the grip portion 23 , bends downward once, and then bends in the width direction B. It is formed extending outward along. The convex portion 28 is formed to extend along the longitudinal direction A at the upper end of the corner portion of the downwardly bent portion of the elastic support portion 27 .

When closing the opening 15 with such a lid 21, the two projections 22 of the lid 21 are fitted into the two recesses 17, and the upper end of the lid 21 is moved inward along the width direction B. , the elastic support portion 27 once bends downward so that the convex portion 28 rides over the convex portion 18, and then returns. That is, the elastic support portion 27 is elastically deformable so as to engage the convex portion 28 with the convex portion 18 . Thereby, the protrusion 28 and the protrusion 18 are engaged with each other, and the lid 21 is locked to the frame 11 . At this time, the frame 11 has two concave portions 17 and one convex portion 18, and the lid 21 has two convex portions 22 and one convex portion 28. 15 can be attached at three points. Therefore, the lid 21 can be fixed to the frame 11 without rattling, and the airtightness between the frame 11 and the lid 21 is improved. On the other hand, when the tip 27a of the elastic support portion 27 is pressed downward so as to approach the grip portion 23 while the lid 21 is locked to the frame 11, the engagement between the convex portion 28 and the convex portion 18 is released. , the elastic support portion 27 bends downward, and the convex portion 28 moves downward. Then, by gripping the gripping portion 23 and pulling the upper end portion of the lid body 21 outward along the width direction B in a state in which the engagement between the convex portion 28 and the convex portion 18 is released, the lid body 21 can be framed. It can be removed from the body 21.

Next, a method of attaching the foundation inspection opening 10 to the foundation 1 will be described below with reference to FIG.

As shown in FIG. 7(a), first, a foundation 1 having a raised portion 1b with an opening 2 formed in the middle in the longitudinal direction A is formed. After that, as shown in FIG. 7(b), a heat insulating material 6 is provided on the entire inner surface 1c of the rising portion 1b. The heat insulating material 6 may be provided by spraying urethane foam, or may be provided by attaching a styrene foam plate. Alternatively, the heat insulating material 6 may be provided after the basic inspection opening 10 is attached to the opening 2 .

Next, the frame 11 of the foundation inspection opening 10 is installed in the opening 2 formed in the rising portion 1b of the foundation 1 (frame installation step). At this time, the frame main body 12 is arranged in the opening 2 while the tip surface 13d of the flange 13 and the tip surfaces of the plurality of ribs 13b are brought into contact with the outer surface 1d of the rising portion 1b. That is, the flange 13 of the frame 11 is made to face the peripheral edge of the opening 2 of the rising portion 1b. At this time, the frame body 11 may be installed in the opening 2 after applying a temporary fixing adhesive to the peripheral edge portion of the opening 2 which is the outer surface 1d of the rising portion 1b. In this way, the flange 13 of the frame 11 is effectively adhered to the rising portion 1b via the temporary fixing adhesive, and misalignment of the frame 11 can be suppressed. Thereafter, the lid 21 is attached to the frame 11 so as to close the opening 15 of the frame 11 with the lid 21 . Note that the frame 11 may be installed in the opening 2 with the lid 21 attached to the frame 11 so that the opening 15 of the frame 11 is closed by the lid 21 .

Next, between the opening 2 of the foundation 1 and the frame 11, and on the upper surface of the frame 11 (the part facing the base 3), the foamed synthetic resin 5 (for example, foamed urethane) is filled by spraying (filling process). Thereby, the heat insulating material 6 provided on the rising portion 1b of the base 1, the heat insulating body 14 of the frame body 11 and the lid body 21 can be continuously connected by the synthetic resin foam 5. As shown in FIG. That is, since the entire circumference of the underfloor section can be covered with the heat insulating material, the underfloor heat insulation performance can be enhanced in the retrofit type basic inspection opening 10 . The foamed synthetic resin 5 may also be filled between the flange 13 and the outer surface 1d of the rising portion 1b. In this case, since a plurality of ribs 13b are formed on the flange 13, the bonding area with the foamed synthetic resin 5 is increased, so that the frame 11 can be bonded more effectively to the base 1. Thus, the attachment of the foundation inspection opening 10 to the opening 2 of the foundation 1 is completed. After that, the building structure 100 shown in FIG. 1 is completed by fixing the foundation packing 4 and the base 3 on the rising portion 1b.

As described above, according to the basic inspection opening 10 and the mounting method thereof of the present embodiment, the basic inspection opening 10 can be retrofitted to the opening 2 formed at the time of foundation formation. Therefore, it is not necessary to embed the frame 11 of the foundation inspection opening 10 in the rising portion 1b of the foundation 1 when forming the foundation, and the foundation inspection opening 10 can be easily attached to the foundation 1.

Further, since the frame 11 has the flange 13, even if the opening 2 formed in the foundation 1 is slightly larger than the frame main body 12, when the foundation inspection opening 10 is attached to the opening 2 of the foundation 1, the flange 13 can face the perimeter of the opening 2 in the foundation 1 . That is, the permissible range of the dimensions of the opening formed in the foundation 1 is widened, and the opening 2 can be easily formed in the foundation 1 .

Further, since the frame 11 has the concave portion 17 and the convex portion 18, and the lid 21 has the convex portions 22 and 28, the convex portions 22 and 28 are engaged with the concave portion 17 and the convex portion 18. The opening 15 can be closed with a lid 21 . In addition, since the lock member 25 can release the engagement of the convex portion 28 with the convex portion 18 by displacing the elastic support portion 27, the lid 21 that closes the opening portion 15 can be easily removed. becomes possible. Therefore, it is possible to easily open and close the lid in a narrow space under the floor during inspection.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. The plurality of ribs 13b may not be formed on the flange 13 of the frame 11 in the above-described embodiment. Also, the frame body 12 of the frame body 11 may be formed in a shape other than a rectangular cylinder, for example, a cylindrical shape. Also, the frame body 12 may not have the lower portion extending in the longitudinal direction A. That is, the frame body 12 is not particularly limited to a cylindrical shape. Also, the frame 11 may not have the heat insulator 14 . The frame 11 may be made of a metal material. Moreover, the lid 21 may be made of a metal material or a synthetic resin material.

Alternatively, the frame 11 may be formed with a projection as the first engaging portion, and the lid 21 may be formed with a recess as the first engaged portion into which the projection is fitted. Alternatively, a concave portion may be formed in the frame 11 as the second engaging portion, and the convex portion 28 may be fitted into the concave portion. Further, a concave portion serving as a second engaged portion into which the convex portion 18 is fitted may be formed in the lid body 21 . Further, the frame 11 may not be provided with the first engaging portion and the second engaging portion, and the lid 21 may not be provided with the first engaged portion and the second engaged portion. Also, the lock member 25 may not be provided.

Also, one first engaging portion and one first engaged portion may be provided on the frame 11 and the lid 21, respectively. Also, the packing 19 may not be provided. In this case, when the lid 21 is attached to the frame 11 and the opening 15 is closed, it is preferable that the outer peripheral surface of the lid 21 and the inner peripheral surface of the frame 11 that face each other contact each other. .

Reference Signs List 1 foundation 2 opening 10 foundation inspection opening 11 frame 12 frame main body 12a outer peripheral side 13 flange 13a facing surface 13b flange 14 heat insulator 16 inner peripheral surface 16a1 lower surface 16a2 upper surface 17 recess (first engaging portion)
18 convex portion (second engaging portion)
19 Packing 21 Lid 21a Lower surface 22 Convex portion (first engaged portion)
25 lock member 27 elastic support portion 28 convex portion (second engaged portion)

Claims (10)

A foundation forming step of forming the foundation by providing an opening extending over the entire top and bottom in the rising portion of the foundation that defines the lower space of the bathroom;
a frame arranging step of arranging a frame of a foundation inspection opening in the opening formed in the foundation;
A filling step of filling a foamed synthetic resin between the opening of the foundation and the frame,
The frame has a flange formed to protrude from the outer peripheral side surface,
In the frame arranging step, the flange of the frame is opposed to the outer peripheral edge of the opening of the lower space of the bathroom of the foundation,
A method for installing a foundation inspection door, wherein in the filling step, the foamed synthetic resin is filled between the opening inner surface of the foundation and the frame from the lower space side of the bathroom. The frame has a heat insulator covering the entire outer peripheral side surface of the frame body,
2. The method of installing a foundation inspection opening according to claim 1, wherein in said filling step, said foamed synthetic resin is filled between said heat insulator and the inner surface of the opening of said foundation. 3. The method for installing a foundation inspection opening according to claim 1, further comprising a heat insulating material installing step of providing a heat insulating material on the inner surface of the foundation before the filling step. 4. The method according to any one of claims 1 to 3, further comprising a lid mounting step of mounting a heat insulating lid on the frame so as to close the opening of the frame after the frame arranging step. A method for installing a basic inspection opening according to any one of the above items. Concavities and convexities are formed on the facing surface of the flange facing the base,
5. The method of installing a foundation inspection opening according to claim 1, wherein in said filling step, said foamed synthetic resin is filled between said facing surface of said flange and said foundation. A foundation that defines a lower space of a bathroom with an opening formed thereon, a frame that is mounted in the opening and has an opening inside the opening, and a foundation inspection opening that has a lid that can fit into the opening. and a building structure comprising
The frame body has a flange formed so as to protrude from the outer peripheral side surface, and after the foundation is formed so that the flange faces the opening peripheral edge portion outside the lower space of the bathroom of the foundation. mounted within the opening;
A building structure, wherein foamed synthetic resin is filled between the flange, the opening, and the outer peripheral side surface. Further comprising a foundation arranged on the foundation and the foundation inspection opening,
7. The building structure according to claim 6, wherein said foamed synthetic resin is also filled between said base and said frame. A foundation that defines a lower space of a bathroom in which an opening with an upper side is formed, a frame that is mounted in the opening after the foundation is formed, and has an opening inside the opening, and the opening A building structure comprising a foundation inspection opening having a lid that can be fitted to the
a foundation disposed on the foundation and the foundation inspection opening;
a foundation packing disposed between the foundation and the base except between the frame and the base;
The building structure further comprising foamed synthetic resin filled between the frame and the base and between the frame and the opening . Further comprising a heat insulating material provided to cover one side surface of the foundation,
The building structure according to any one of claims 6 to 8, wherein the foamed synthetic resin is also filled between the frame and the heat insulating material. 8. The building structure according to claim 6 or 7, wherein a plurality of unevennesses are formed on a surface of the flange that faces the peripheral edge of the opening of the foundation.

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