JP5653712B2 - Building floor structure - Google Patents

Description

  The present invention relates to a floor structure of a building such as a house.

  In recent years, in order to improve comfort, increase the efficiency of air conditioning and prevent problems such as condensation, heat insulation lines and airtight lines are formed around the living room space inside the house to provide good heat insulation. A structure with airtightness is known. Such heat insulation lines and airtight lines are formed by connecting heat insulation surfaces and airtight surfaces provided on the outer wall, ceiling, and floor of a house.

  For example, Patent Document 1 discloses a residential building formed by attaching a floor panel made of lightweight cellular concrete (ALC) and an outer wall to a steel frame structure. In the residential building, an airtight and heat insulation line is disclosed. Is formed on each floor. The airtight and heat insulation lines of a certain floor will be described as a representative. Airtight heat insulating material is installed on the indoor side of the outer wall of the floor, and the lower surface of the beam that supports the floor panel of the upper floor of the floor, and An airtight heat insulating material is provided along the indoor side surface. An airtight and heat insulation line is formed by the floor panel of the upper floor, the airtight heat insulating material around the beam, the airtight heat insulating material provided along the outer wall, and the floor panel surface of the floor.

  By the way, in recent years, the demand for the degree of freedom of space configuration for a residential building has increased, and proposals have been made to make the height of the room higher or lower than other rooms depending on the nature of the room. For example, Patent Document 2 discloses a configuration of a skip floor type building having a lowered floor portion in which a part of floors constituting the intermediate floor is made lower in the intermediate floor.

JP 2003-96940 A JP 2002-332711 A

  However, in the configuration as in Patent Document 2, when the lower floor is an outdoor area opened to the outside, the outdoor air in the outdoor area passes between the lowered floor and the general floor. As a result, the entire building may be damaged.

  The present invention has been made to solve such a problem, and even when the lower floor portion is provided in a part of an intermediate floor mainly composed of the general floor portion, the general floor portion and the lower floor portion are provided. An object of the present invention is to provide a floor structure of a building that can prevent the outside air from flowing into the room by passing between the two.

The present invention has at least one intermediate floor, and the intermediate floor includes a general living room and a floor-lowering room provided adjacent to the general living room and having a lower floor surface than the general living room. A floor structure of a building in which an outdoor region opened to the outside is formed below the floor-lowering room, wherein the bottom of the general room is formed by a general floor, and the bottom of the floor-down room is the general floor The lower floor part is formed by a lower floor part having a floor surface at a lower position, and a lower floor room is provided below the general floor part. An outer wall portion to be formed is provided, and between the general floor portion and the lowered floor portion, a lid body that shields the continuity between the outdoor air in the outdoor area and the floor-lowering room is provided, and the lid body has at least the upper portion It is connected with the general floor in an airtight state, and the lower part is the lowered floor. Characterized in that it is connected in a state of being subjected to air-tight process with.

  According to the present invention, the space between the general floor portion and the lowered floor portion is closed by the lid body, and the lid body is connected to each floor portion in an airtight state. It is possible to reliably prevent the outside air from passing between the general floor portion and the lowered floor portion. As a result, heat insulation as a whole building can be secured.

The present invention has at least one intermediate floor, and the intermediate floor includes a general living room and a floor-lowering room provided adjacent to the general living room and having a lower floor surface than the general living room. The floor structure of the building in which an outdoor area opened to the outside is formed below the floor-lowering room, the bottom of the general room is formed by the general floor, and the bottom of the floor-down room is from the general floor A lower floor portion having a floor surface at a lower position, and a lid body is provided between the general floor portion and the lower floor portion, which shields the continuity between the outside air in the outdoor area and the lower floor room. The upper part is connected with at least the general floor part in an airtight state, and the lower part is connected with the lowered floor part in an airtight state . It is equipped with a beam that supports the end of the general floor part on the floor-lowering room side, and the lid is formed in a plate shape Characterized in that provided along the the side surface of the floor up room side. According to the present invention, the space between the general floor portion and the lowered floor portion is closed by the lid body, and the lid body is connected to each floor portion in an airtight state. It is possible to reliably prevent the outside air from passing between the general floor portion and the lowered floor portion. As a result, heat insulation as a whole building can be secured. Moreover, a general floor part will be supported by a beam and the support strength of a general floor part can be improved. Furthermore , a lid can be installed along the beam, and the workability of lid attachment can be improved.

  Further, the above-mentioned beam has an H shape in which a pair of flanges are connected by a web, and it is preferable that a sound insulating material is filled between the pair of flanges on the beam side of the lid. is there. With this configuration, it is possible to improve the sound absorbing property of the floor hanging room. In addition, an inevitable space is generated between the flanges on the indoor side of the lid by making the beam H-shaped with a pair of flanges. Space can be used effectively, and it is not necessary to secure a new space for installing the sound insulation material.

  Furthermore, it is preferable that an airtight layer is provided on the indoor side surfaces of the general floor portion and the lowered floor portion, and the lid body is connected in a state where the airtight treatment is applied to the airtight layer of the general floor portion and the lowered floor portion. It is. According to this configuration, airtightness is ensured from the general floor portion to the lowered floor portion, and the airtightness of the intermediate floor can be remarkably improved.

  Furthermore, a lower floor room is provided below the general floor part, and an outer wall part that is airtight and forms a side surface of the lower floor room is provided below the lowered floor part or the beam. And the general floor part are connected along the side surface of the lower floor of the beam, and are connected to the outer wall part in an airtight manner, and are airtight to the floor surface of the general floor part. It is preferable that a second lid body that is connected in a state where the treatment is performed and blocks the continuity between the outside air in the outdoor area and the lower floor room is provided. According to this configuration, the second lid body is provided between the lower floor room below the general living room and the outdoor area below the floor lowering room, and passes between the outdoor area and the lower floor room. It is possible to prevent outside air from flowing into the room.

  Furthermore, it is preferable that the lid is formed of a plastic heat insulating material having airtightness and heat insulating properties. According to this structure, heat insulation is also provided between the general floor portion and the lowered floor portion by the lid, and it is possible to improve the thermal environment of the floor lowering room. Further, for example, by forming the lid as a face material, it is possible to facilitate the construction when installing the lid.

  According to the present invention, even when a part of an intermediate floor having a general floor portion as a main part has a lowered floor portion, outside air flows into the room through the space between the general floor portion and the lowered floor portion. Can be prevented.

It is a perspective view of the building concerning the embodiment of the present invention. It is sectional drawing which shows the 1st floor part of the building which concerns on this embodiment. It is sectional drawing which shows the 2nd floor part of the building which concerns on this embodiment. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3. It is sectional drawing along the VV line of FIG.

Preferred embodiments of the present invention will be described below with reference to the drawings.
(Overall structure of the building)

  As shown in FIG. 1 to FIG. 3, a building 1 according to an embodiment of the present invention is a three-story residential building, and a structural housing 2 composed of beams 3A and 3B and a pillar 4 (see FIG. 3). The floors 5A, 5B, 5C, which are supported by the beams 3A, 3B, the pillars 4 and the like to form the floors of the respective floors, and the roofs of the building 1 are supported by the beams 3A, 3B, the pillars 4 and the like. A roof portion 6 and an outer wall 8 that is supported by the beams 3 </ b> A and 3 </ b> B, the pillar 4, and the like and forms the outer skin of the building 1 are provided. In addition, in the building 1 according to the present embodiment, there is a place where the small beam 3Z is provided at an appropriate place.

  The structural frame 2 constitutes a so-called ramen structure comprising a plurality of (four in this embodiment) columns 4 rising from the foundation and a plurality of beams 3A and 3B installed between the adjacent columns 4. doing.

  The pillar 4 according to the present embodiment extends from the lower part of the first floor to the upper part of the third floor of the building 1, and has a beam joint set at a predetermined height to form each floor, and a beam joint from the end. And a general part composed of a long part communicating between the upper and lower beam joints. The general part is formed of a known square steel pipe. Further, the beam joint portion has a height similar to that of the beams 3A and 3B (the height from the lower end to the upper end of the beams 3A and 3B) and is formed in a rectangular tube shape.

  The beams 3 </ b> A and 3 </ b> B are in surface contact with a beam main body formed of H-shaped steel formed by connecting the central portions of a pair of upper and lower flanges with a web, and both ends of the beam main body and the beam joint of the column 4. And an end plate. The beams 3 </ b> A and 3 </ b> B are appropriately bolted with the end plate in surface contact with the beam joint.

  The floor portion 5A on the first floor is formed by laying a plurality of floor panels 5a (see FIG. 2) made of lightweight cellular concrete (ALC) having a predetermined size on a foundation. The floors 5B and 5C on the second floor and the third floor integrate a plurality of floor panels 5a made of lightweight cellular concrete having a predetermined size and the plurality of floor panels 5a structurally. And a plurality of floor panels 5a are appropriately supported by the beams 3A and 3B.

  In the present embodiment, the second floor corresponds to an intermediate floor, and the floor portion 5B (see FIG. 3) on the second floor has a general floor portion 50 having a floor surface that matches the floor height of the second floor, and the floor surface is A lower floor 51 that is lower than the general floor 50 is provided.

  The roof part 6 (refer FIG. 1) is provided with the several roof panel 6a made from the lightweight cellular concrete formed in a predetermined dimension. Moreover, as the roof part 6, two types of modes are provided: a land roof part 61 in which a roof panel 6 a is horizontally laid, and an inclined roof part 62 that connects the land roof part 61 and the outer wall 8 of the building 1. Yes.

  Since the roof portion 6 has an outer surface area that faces the outdoors and is exposed to wind and rain, the outer surface area is provided with a waterproof structure for preventing rainwater and the like from entering the room. For example, a predetermined waterproof structure is formed on the flat roof 61 by laminating a foam base material (heat insulating material), a non-combustible plate, and a waterproof sheet on a roof panel 6a made of lightweight cellular concrete (ALC). In addition, the inclined roof portion 62 has a predetermined waterproof structure formed by laminating a non-combustible plate, a waterproof sheet, and a roof finishing material (tile material) on the roof panel 6a made of lightweight cellular concrete (ALC). Yes.

  The outer wall 8 is generally formed by a plurality of outer wall panels 9A made of lightweight cellular concrete having a predetermined size, and each outer wall panel 9A has a beam 3A at both upper and lower ends by a so-called locking method (also referred to as “locking mechanism”). , 3B or on the beams 3A, 3B and the foundation. Further, a heat insulating material is provided inside the outer wall panel 9A, and an interior base for supporting the interior material is provided inside the heat insulating material.

  The main heat insulating material according to the present embodiment is a heat insulating board formed in a flat plate shape using a plastic heat insulating material having airtightness such as phenol foam. This type of heat insulating material is divided into a plurality of blocks according to the size of the part to be installed, and each block is laid at a predetermined position inside the outer wall panel 9A, and the seam is covered with an airtight tape or the like. Yes. As the heat insulating material, fiber heat insulating materials such as rock wool and glass wool are also used as appropriate.

  The interior base is formed in a wooden frame shape formed by assembling a plurality of horizontal rails between a pair of vertical rails, and is fixed to the floor panel 5a and the beams 3A and 3B via support fixing members. It is supposed to be. The interior material is formed of a flat plaster board or the like, and is formed by fastening the gypsum board to the interior base.

  The overall configuration of the building 1 according to the present embodiment is as described above. Next, an example of the floor plan of the building 1 according to the present embodiment will be briefly described.

  In the building 1 according to this embodiment, a garage (cavity) G is formed in the front part (portion facing the street) of the first floor. In addition, a region behind (behind) the garage G is covered with an outer wall 8, and an indoor region (indoor region) inside the outer wall 8 is provided with respective living rooms. When the garage G is viewed from the front of the building 1, the indoor area on the right side protrudes toward the front side, and the entrance R1 is provided in this protruding area.

  On the second floor, a living room R8 is provided at a front portion substantially above the garage G on the first floor, and a kitchen R10 is provided behind the living room R8. The living room R8 is configured as a lowered floor 51.

Further, a veranda V is disposed facing the kitchen R10, and a high wall portion 10 having a height (height) higher than that of a normal handrail is provided at the tip of the veranda V. The high wall portion 10 is formed by an outer wall panel 9A, and the height of the high wall portion 10 is about several tens of centimeters lower than the height of the second floor. As a result, the kitchen R10 can secure lighting while the line of sight from the adjacent building is blocked by the high wall portion 10.
(Floor structure between a lowered floor room and a general room)

  Next, the floor structure according to the embodiment of the present invention will be described in detail with reference to FIGS. As described above, the second floor serving as the intermediate floor includes the general living room R20 including the kitchen R10 and the living room (hereinafter referred to as “floor-lowering living room”) R8 provided adjacent to the general living room R20. . The bottom part of the general living room R20 is formed by the general floor part 50 which is the main structure of the second floor, and the bottom part of the lower floor living room R8 is formed by the lowered floor part 51 whose floor surface 51a is lower than the general floor part 50. ing. A garage G serving as an outdoor area opened to the outside is provided below the floor-lowering room R8.

  The garage G is directly below the floor-lowering room R8, and overlaps with the garage part Ga that overlaps the lowered floor part 51 in plan view, behind the garage part Ga, and part of the general floor part 50 in plan view, and from the entrance R1 And an entrance communication part Gb provided so as to be able to enter and exit the room.

In an ordinary general building, the floor is generally flat on one intermediate floor, and it is easy to ensure airtightness structurally. On the other hand, in the building 1 according to the present embodiment, the lowered floor portion 51 of the floor lowering room R8 is lower than the general floor portion 50 of the general living room R20. Due to the difference in level, it is difficult to ensure sufficient airtightness with the conventional floor structure. Therefore, in the present embodiment, special floor structures 11A and 11B different from the conventional one are adopted. Hereinafter, the floor structure 11A (first embodiment) between the general floor portion 50 and the lowered floor portion 51 above the entrance R1, and the general floor portion 50 and the lowered floor portion above the entrance communication portion Gb of the garage G. The floor structure 11 </ b> B (second embodiment) between the two and 51 is described in order.
(Floor structure according to the first embodiment)

  The general floor 50 is formed with a plurality of floor panels 5a made of ALC. As shown in FIG. 4, the end of the floor panel 5a on the floor lowering room R8 side is supported by being in contact with a beam 3B (hereinafter referred to as “general floor beam” for convenience) provided on the column 4. ing. The general floor beam 3B includes an upper flange 3a, a lower flange 3c, and a web 3b that connects a pair of upper and lower flanges 3a and 3c, and is made of H-shaped steel that exhibits an H shape in a cross-sectional view.

  Below the general floor beam 3 </ b> B, a beam 3 </ b> C that supports the plurality of floor panels 5 a of the lowered floor portion 51 (hereinafter referred to as “lowered floor beam” for convenience) is provided. The lowered floor beam 3C includes an upper flange 3d, a lower flange 3f, and a web 3e that connects the pair of upper and lower flanges 3d and 3f, and is made of H-shaped steel that exhibits an H shape in a cross-sectional view. The lowered floor beam 3C extends along the longitudinal direction of the general floor beam 3B, and is arranged so as to overlap the general floor beam 3B in plan view. Further, the lowered floor beam 3C is bolted to the lower flange 3c of the general floor beam 3B via a connection hardware (hereinafter referred to as "connection hardware") 30.

  A support hardware 36 for supporting the floor panel 5a of the lowered floor portion 51 is coupled to the floor lowering room R8 side of the web 3e of the lowered floor beam 3C. The notch 36a is provided. A long member 52 having an L-shaped cross section is in contact with the notch 36 a, and the floor panel 51 a is supported by the long member 52.

  The floor panel 5a of the lowered floor 51 is a panel member made of ALC and has a certain degree of heat insulation and airtightness. As for this floor panel 5a, the lower surface of the end part by the side of general living room R20 is supported by the elongate member 52. As shown in FIG. The gap between the floor panel 5a and the long member 52 is filled with an airtight material 53 such as mortar.

  Above the floor panel 5 a of the lowered floor portion 51, a heat insulating plate (hereinafter referred to as “lid”) 20 made of an airtight plastic heat insulating material such as phenol foam is erected. The lid 20 is formed in a plate shape, and is connected to the floor panel 5a via an airtight material 53 in a state where an airtight treatment is performed.

  Moreover, the cover body 20 is provided along the side surface by the side of the floor-lowering room R8 of the general floor beam 3B. A sound insulating material 21 having a sound insulating property (sound absorbing property) such as rock wool is filled on the side of the general floor beam 3B of the lid 20 and between the upper and lower flanges 3a and 3c. In the present embodiment, the sound insulating material 21 additionally has a heat insulating function.

  The lid 20 protrudes upward from the upper flange 3a of the general floor beam 3B, and is arranged so that the upper end portion is aligned with the upper end surface of the floor panel 5a of the general floor portion 50. A hermetic material 22 such as mortar is filled between the lid 20 and the floor panel 5 a, and as a result, the upper part of the lid 20 is hermetically sealed to the floor panel 5 a of the general floor 50 through the hermetic material 22. They are connected in a state where they have been processed.

  Further, a self-leveling material such as mortar is installed on the upper end portion 20a of the lid 20, the upper surface 22a of the airtight material 22, and the upper end surface (interior side surface) 50a of the floor panel 5a, and the smooth layer 50b is formed. Is formed. As a result, the upper end portion 20a of the lid 20 is embodied in a state in which the upper end portion 20a is connected to the general floor portion 50 through the smooth layer 50b or in a state of being subjected to an airtight treatment with a sealing material, an adhesive, an airtight tape, or the like. ing. In addition, the function of the smooth layer 50b is to support the panel-like floor finish 50c flatly, and the floor finish 50c is installed on the smooth layer 50b so as to cover the entire surface of the smooth layer 50b. . The smooth layer 50b corresponds to an airtight layer provided on the indoor side surface of the general floor in the present invention.

  Similarly to the general floor portion 50 described above, a smoothing layer 51b is formed on the floor surface (inside surface) 51a of the floor panel 5a of the lowered floor portion 51 by installing a self-leveling material such as mortar. And the lower end part 20b of the cover body 20 is connected to the airtight material 53 of the lowered floor part 51 and the smooth layer 51b in a state where an airtight process is performed by a sealant, an adhesive, an airtight tape or the like. The smooth layer 51b corresponds to an airtight layer provided on the indoor side surface of the lowered floor in the present invention.

  A wooden frame-like interior base 23 is erected along the side surface of the lid 20 on the floor lowering room R8 side of the lid 20. In addition, two interior finishing materials 23a and 23b such as gypsum boards are stacked on the floor lowering room R8 side of the interior base 23. The upper end of the interior finishing material 23b communicates with the floor finishing material 50c of the general floor portion 50, and a collar 25 is fixed to a contact portion between the interior finishing material 23b and the floor finishing material 50c.

  On the smooth layer 51b of the lowered floor 51, a floor finishing material 51c is installed. The floor finishing material 51c is disposed so as to contact the lower portion of the interior finishing material 23b, and a baseboard 24 is installed at the contact point between the interior finishing material 23b and the floor finishing material 51c.

  Below the lowered floor portion 51 and the lowered floor beam 3C, an ALC outer wall panel (outer wall portion) 9B is provided which forms an airtight side surface of the entrance R1 serving as a lower floor room. The lower flange 3f of the lowered floor beam 3C is provided with an outer wall support portion 33 that supports the upper end portion of the outer wall panel 9B with a locking mechanism. The outer wall support portion 33 supports the upper end portion of the outer wall panel 9B so as to sandwich it.

  An eave heaven 37 is installed on the garage G side of the outer wall support portion 33. A heat insulating material 38 such as rock wool is installed on the upper surface side of the eaves ceiling 37, that is, the indoor side so as to cover the eaves 37, and between the heat insulating material 38 and the floor panel 5 a of the lowered floor portion 51. An air layer Ac is formed.

  On the indoor side of the outer wall panel 9B forming the outer wall 8 of the entrance R1, a heat insulating board (hereinafter referred to as “first heat insulating portion”) 41 made of a plastic heat insulating material such as phenol foam is installed. ing. The 1st heat insulation part 41 is standingly arranged along the wall surface of the outer wall panel 9B, and is connected with the outer wall panel 9B in the state to which the airtight process was given by adhesion | attachment etc.

  On the lower surface of the lower flange 3f, a heat insulation board (hereinafter referred to as “second heat insulation portion”) 42 manufactured from an airtight plastic heat insulating material such as phenol foam is installed. The second heat insulating portion 42 is connected in a state in which an end on the outer wall panel 9B side is in contact with an upper portion of the first heat insulating portion 41 and is subjected to airtight processing such as sticking or adhesion of an airtight tape. Further, the second heat insulating portion 42 is arranged so that the end portion on the indoor side is aligned with the end portion on the indoor side of the lower flanges 3d and 3f on the lower floor beam 3C.

  On the indoor side of the lowered floor beam 3C and the general floor beam 3B, a heat insulating plate (hereinafter referred to as “third heat insulating portion”) 43 made of an airtight plastic heat insulating material such as phenol foam stands. It is installed. The third heat insulating part 43 is formed in a plate shape, and the lower part is connected to the indoor side end of the second heat insulating part 42 in a state where an airtight process is performed by adhesion or the like. The third heat insulating portion 43 is in contact with the indoor side end portions of the upper and lower flanges 3d and 3f of the lowered floor beam 3C and the indoor side end portions of the upper and lower flanges 3a and 3c of the general floor beam 3B. However, it is connected to the lower surface (floor surface) 50d of the floor panel 5a of the general floor portion 50 in a state where airtight processing such as sticking or adhesion of an airtight tape is performed.

  A heat insulating board (hereinafter referred to as “screwing board”) 26 manufactured from a plastic heat insulating material such as phenol foam between the upper and lower flanges 3a and 3c on the indoor side of the general floor beam 3B. Is installed. The screwing board 26 is fitted into a predetermined position in a vertical state and with the normal direction of the board surface facing the longitudinal direction of the general floor beam 3B. The third heat insulating portion 43 abuts on the indoor edge of the screwing board 26 and is fixed to the screwing board 26 with screws 27.

  The 3rd heat insulation part 43 is arrange | positioned between the outer wall panel 9B and the general floor part 50, and is along the side surface by the side of the entrance (lower-floor room) R1 of the lower floor beam 3C and the general floor beam 3B. Extend. Further, the third heat insulating portion 43 is connected to the outer wall panel 9B through the first heat insulating portion 41 and the second heat insulating portion 42 in an airtight state, and the lower surface of the floor panel 5a of the general floor portion 50. (Floor surface) 50d is connected in an airtight state. The 3rd heat insulation part 43 is corresponded to a 2nd cover body, and interrupts | blocks continuation with the open air of the garage G used as an outdoor area | region, and the entrance R1.

  A wooden frame-like interior base 44 is installed along the side surface of the third heat-insulating part 43 on the indoor side of the third heat-insulating part 43, and further, an interior finishing material 45 such as a plaster board is provided on the indoor side of the interior base 44. Is installed. The interior finishing material 45 is provided with an interior finishing material to be the inner wall ceiling 46, and a peripheral edge 47 is fixed to the contact point between the inner wall ceiling 46 and the interior finishing material 45.

  According to the floor structure 11 </ b> A according to the present embodiment, the space between the general floor portion 50 and the lowered floor portion 51 is closed by the lid body 20, and the lid body 20 is between the general floor portion 50 and the lowered floor portion 51. Since it is connected in a state of being subjected to airtight treatment, it is possible to reliably prevent outside air from the garage G serving as an outdoor area from passing between the general floor portion 50 and the lowered floor portion 51 and flowing into the room. be able to.

  Further, on the second floor, which is the intermediate floor, the end of the general floor 50 on the side of the floor-lowering room R8 is supported by the general floor beam 3B, and the support strength of the general floor 50 is improved. Furthermore, since the lid 20 is formed in a plate shape and can be installed along the side surface of the general floor beam 3B on the floor-lowering room R8 side, it is possible to improve the workability when the lid 20 is attached.

  Furthermore, in the present embodiment, since the sound insulating material 21 is filled between the pair of upper and lower flanges 3a and 3b on the side of the general floor beam 3B of the lid body 20, the sound absorption is mainly performed in the floor lowering room R8. In addition, the heat insulation can be improved supplementarily. In addition, since the general floor beam 3B is made of H-shaped steel, an inevitable space is generated between the pair of upper and lower flanges 3a, 3b. By filling the space with the sound insulating material 21, the empty space is effectively used. It can be utilized, and it is not necessary to secure a new space for installing the sound insulating material 21, which is effective for space saving.

  Further, smooth layers 50b and 51b are provided on the upper end surfaces (interior side surfaces) 50a and 51a of the general floor portion 50 and the lowered floor portion 51, and the lid 20 is formed by the smooth layers of the general floor portion 50 and the lowered floor portion 51. 50b and 51b are connected in an airtight state, so that the airtightness is secured from the general floor portion 50 to the lowered floor portion 51. In particular, the airtightness of the second floor which is an intermediate floor is ensured. It can be significantly improved.

  Furthermore, between the outer wall panel 9B and the general floor part 51, the 3rd heat insulation part (2nd cover body) 43 which interrupts | blocks continuation with the external air of the garage G which is an outdoor area | region, and the entrance R1 is provided. . That is, the third heat insulating portion 43 is provided between the entrance R1 below the general living room R20 and the garage G below the floor-lowering living room R8, and the outside air passes between the garage G and the entrance R1 to enter the room. Inflow can be prevented.

Furthermore, since the lid 20 or the third heat insulating portion (second lid) 43 is formed of a plastic heat insulating material having airtightness and heat insulating properties, the lid 20 or the third The heat insulation part 43 will also provide heat insulation between the general floor part 50 and the lowered floor part 51, and the thermal environment of the floor lowering room R8 can be improved. Moreover, since the cover body 20 or the 3rd heat insulation part 43 is a plate-shaped member (surface material), construction at the time of installing the cover body 20 or the 3rd heat insulation part 43 can also be aimed at.
(Floor structure according to the second embodiment)

  As shown in FIG. 5, the floor structure 11 </ b> B according to the second embodiment of the present invention is provided between the general floor portion 50 and the lowered floor portion 51 above the entrance communication portion Gb of the garage G. In addition, in the floor structure 11B according to the present embodiment, members and elements common to the floor structure 11A according to the first embodiment, or substantially the same members and elements as those of the floor structure 11A according to the first embodiment. The same reference numerals are assigned and detailed description is omitted.

  Also in the floor structure 11B according to the present embodiment, between the general floor portion 50 and the lowered floor portion 51, the outside air of the garage G (outdoor area) and the floor lowering are provided, similarly to the floor structure 11A according to the first embodiment. A lid 20 that shields the continuity with the living room R8 is provided. That is, the lid 20 is connected in a state where the upper portion is at least airtightly treated with the general floor portion 50 and the lower portion is connected with the lowered floor portion 51 while being airtightly treated. It is connected.

  An upper support portion 72 that supports the upper end portion of the outer wall panel 9C is fastened to the lower flange 3c of the general floor beam 3B. In addition, a lower support portion 71 that supports the lower portion of the outer wall panel 9C is fastened to the lower flange 3f of the lowered floor beam 3C. The outer wall panel 9C is a panel for blinding the lowered floor beam 3C, and is made of ALC.

  An eave heaven 37 is installed on the floor support room R8 side of the lower support portion 71. A heat insulating material 38 such as rock wool is installed on the upper surface side of the eaves ceiling 37, that is, the indoor side so as to cover the eaves 37, and between the heat insulating material 38 and the floor panel 5 a of the lowered floor portion 51. An air layer Ac is formed.

  An eave heaven 64 is installed on the side of the upper support 72 opposite to the floor-lowering room R8. A heat insulating material 39 such as rock wool is installed on the upper surface side of the eave heaven 64, that is, the indoor side so as to cover the eave heaven 64, and further, between the heat insulating material 39 and the floor panel 5a of the lowered floor portion 51. An air layer As is formed.

  According to the floor structure 11 </ b> B according to the present embodiment, the space between the general floor portion 50 and the lowered floor portion 51 is closed by the lid body 20, and the lid body 20 is between the general floor portion 50 and the lowered floor portion 51. Since it is connected in a state of being airtightly treated, the outside air of the garage G serving as the outdoor region is reliably prevented from flowing between the general floor portion 50 and the lowered floor portion 51 and flowing into the room. Can do. In particular, in the present embodiment, it is necessary to consider the passage of outside air not only to the garage part Ga of the garage G but also to the entrance communication part Gb. It is possible to reliably prevent the air from passing between the portion 50 and the lowered floor portion 51 and flowing into the room.

  As mentioned above, although this invention was demonstrated based on each embodiment, this invention is not limited only to each said embodiment, For example, in the case of a building of 4 stories or more as an intermediate floor, for example. The lower floor or the second floor excluding the uppermost floor, or the upper floor of three or more floors may be used. Moreover, the member used as a cover body is not limited to a phenol foam etc., The other element which can ensure heat insulation and airtightness may be sufficient.

  DESCRIPTION OF SYMBOLS 1 ... Building, 3B ... General floor beam, 3a ... Upper flange, 3b ... Lower flange, 3c ... Web, 9C ... Outer wall panel (outer wall part), 11A, 11B ... Floor structure, 20 ... Lid, 21 ... Sound insulation 43 ... second lid, 50 ... general floor, 50a ... upper end surface (interior surface) of the general floor, 50b ... airtight layer of the general floor, 51 ... lower floor, 51a ... lower floor Upper end surface (interior side surface), 51b ... Airtight layer of the lowered floor, G ... Garage (outdoor area), R1 ... Entrance (lower floor room), R20 ... General room, R8 ... Lower floor room.

Claims (6)

The floor has at least one intermediate floor, and the intermediate floor includes a general living room and a floor lowering room that is provided adjacent to the general living room and has a lower floor surface than the general living room. Below the living room is a building floor structure with an outdoor area open to the outside,
Bottom of the general room is formed in accordance with an般床unit,
The bottom of the lower floor room is formed by a lowered floor having a floor surface at a position lower than the general floor,
A lower floor room is provided below the general floor part, and an outer wall part that is airtight and forms a side surface of the lower floor room is provided below the lower floor part,
Between the general floor portion and the lowered floor portion, there is provided a lid that shields the outdoor air in the outdoor area and the continuation of the floor-lowered room,
The lid is connected with the upper part at least airtightly treated with the general floor, and the lower part is connected with airtightly treated with the lowered floor. The floor structure of the building, characterized by The floor has at least one intermediate floor, and the intermediate floor includes a general living room and a floor lowering room that is provided adjacent to the general living room and has a lower floor surface than the general living room. Below the living room is a building floor structure with an outdoor area open to the outside,
The bottom of the general living room is formed by a general floor,
The bottom of the lower floor room is formed by a lowered floor having a floor surface at a position lower than the general floor,
Between the general floor portion and the lowered floor portion, there is provided a lid that shields the outdoor air in the outdoor area and the continuation of the floor-lowered room,
The lid is connected with the upper part at least airtightly treated with the general floor, and the lower part is connected with airtightly treated with the lowered floor. ,
The intermediate floor includes a beam that supports an end of the general floor portion on the floor-lowering room side,
The lid body floor structure of building you characterized by being formed in a plate shape are provided along the sides of the floor up room side of the beam.   The beam has an H shape in which a pair of flanges are connected by a web, and a sound insulating material is filled between the pair of flanges on the beam side of the lid. The floor structure of a building according to claim 2.   An airtight layer is provided on the indoor side surfaces of the general floor portion and the lowered floor portion, and the lid body is connected in an airtight state to the airtight layers of the general floor portion and the lowered floor portion. The floor structure of a building according to any one of claims 1 to 3, wherein A lower floor room is provided below the general floor part, and an outer wall part that is airtight and forms a side surface of the lower floor room is provided below the lower floor part or the beam,
Between the outer wall portion and the general floor portion, the beam extends along a side surface of the beam on the lower floor room side, and is connected in an airtight manner to the outer wall portion, and A second lid body is provided, which is connected to the floor surface of the general floor portion in an airtight state and blocks the continuity between the outdoor air in the outdoor area and the lower floor room. Item 2 or 3 floor structure of a building.   The building floor structure according to any one of claims 1 to 5, wherein the lid is formed of a plastic heat insulating material having airtightness and heat insulating properties.

Images