JP6491551B2 - Sound absorption structure of building - Google Patents

Description

  The present invention relates to a sound absorbing structure of a building.

  Conventionally, a unit type building constructed by combining a plurality of building units each having a pillar, a floor beam and a ceiling beam is known. When the unit type building is a multi-story building having a lower floor and an upper floor, the lower floor is composed of a plurality of lower floor units, and the upper floor is parallel. It is comprised by the upper floor unit (for example, refer patent document 1).

  In such a multi-storey unit type building, an interstory space is formed between the ceiling material of the lower floor part and the floor material of the upper floor part. The interstory space is formed to extend in the horizontal direction across a plurality of lower floor units and upper floor units.

JP 2011-214321 A

  By the way, in the multi-storey unit type building described above, when an impact sound (floor impact sound) is generated due to an object falling on the floor portion of the upper floor, the floor impact sound diffuses through the interstory space. It is assumed that In that case, the floor impact sound may be transmitted to a wide range of the lower floor through the space between the floors.

  The present invention has been made in view of the above circumstances, and in a multi-storey unit type building having a lower floor part and an upper floor part, floor impact sound generated in the upper floor part is widely transmitted to the lower floor part. The main object of the present invention is to provide a sound absorbing structure for a building that can suppress this phenomenon.

  In order to solve the above problems, a sound absorbing structure for a building according to a first aspect of the present invention includes a lower floor and an upper floor adjacent above the lower floor, and the lower floor includes a plurality of lower floor units. Are arranged in parallel, and the upper floor is configured by arranging a plurality of upper floor units in parallel, and the inter-floor portion between the lower floor and the upper floor is, An interstory space that is a space between the ceiling material of the lower floor and the floor material of the upper floor is formed, and in the interstory space, the lower ceiling ceiling beam of the lower floor unit and the The upper floor beams of the upper floor unit are vertically opposed to each other, and each of the opposed beam beams constitutes an inter-floor beam.The inter-floor space includes the lower floor unit adjacent to the upper and lower sides and the Each unit boundary part of the upper floor unit is partitioned into a plurality of unit interstory spaces by the interstitial beam. The lower-floor ceiling beam and the upper-floor beam that constitute the inter-story beam are both applied to a unit type building made of a shape steel having a groove portion opened in the unit-story space, and adjacent to each other. The interstitial large beam part located at the boundary part of the unit interstitial space part is a boundary interstitial large beam part, and the boundary interstory large beam part is provided in each groove part of the lower floor ceiling large beam and the upper floor large beam, respectively. The sound-absorbing material is arranged along these large beams.

  In a multi-storey unit type building, in the inter-floor space between the lower floor ceiling material and the upper floor material, the lower ceiling beam of the lower unit and the upper floor beam of the upper unit Are opposed to each other in the vertical direction, and the two beams arranged opposite to each other constitute an inter-story beam. In this case, the interstory space is divided into a plurality of unit interstitial space parts by interstitial large beam parts for each unit boundary part of the lower and upper floor units adjacent vertically. Each of the lower-floor ceiling girder and the upper-floor girder constituting the inter-story girder is made of a shape steel having a groove, and the gutter is disposed toward the unit inter-story space.

  In such a multi-story unit type building, in the present invention, attention is paid to the interstitial large beam part (boundary interstitial large beam part) located at the boundary part of the adjacent unit interstitial space part. A sound absorbing material is disposed in each groove portion of the lower floor ceiling beam and the upper floor beam. In this case, since the sound absorbing material is arranged facing the unit inter-story space part of the unit inter-story space part at the boundary part between the adjacent unit interstitial space parts, The sound diffused from the unit floor space to the other unit floor space can be absorbed by the sound absorbing material. Thereby, since the spreading | diffusion of the sound in an interstory space can be suppressed, it can suppress that the floor impact sound produced in the upper floor part is widely transmitted to a lower floor part through an interstory space.

  The sound absorbing structure for a building according to the second invention is the sound absorbing structure for a building according to the first invention, wherein at the boundary between the adjacent unit floor spaces, the pair of boundary inter-storey beam portions that divide each of the unit floor spaces is provided. The sound absorbing material is disposed adjacent to each other, and the sound absorbing material is disposed in each of the groove portions of the lower floor ceiling beam and the upper floor beam in each of the pair of boundary floor beams.

  At the boundary between adjacent unit floor spaces, a pair of boundary floor beams are adjacently arranged to divide each unit floor space. In this case, in the pair of boundary floor beams, the grooves of the lower floor ceiling beam and the upper floor beam are opened toward the unit space between the units. Therefore, in the present invention, a sound absorbing material is disposed in each groove portion of the lower floor ceiling beam and the upper floor beam for each of the pair of boundary floor beams. In this case, since the sound absorbing material is arranged facing each of the adjacent unit floor spaces, the sound diffused from one to the other among the adjacent unit floor spaces and from the other to the other. Each sound can be absorbed by the sound absorbing material. Thereby, since the diffusion of the sound in the interstory space can be suppressed in both directions, it is possible to suitably suppress the floor impact sound generated in the upper floor part from being widely transmitted to the lower floor part through the interstory space. .

  The sound absorbing structure for a building of the third invention is the sound absorbing structure for a building according to the first or second invention, wherein a predetermined unit inter-story space part of the plurality of unit inter-story space parts includes the boundary inter-story large beam part. Surrounded by a plurality of inter-story beams, the sound absorbing material is disposed along the girder in each groove portion of the lower-floor ceiling beam and the upper-floor beam in each of the plurality of inter-story beams. Thus, the predetermined unit floor space is a sound absorbing space surrounded by the sound absorbing material.

  According to the present invention, the sound absorbing material is disposed in each groove portion of the lower-floor ceiling girder and the upper-floor girder in each of the plurality of inter-story girder portions that surround the (predetermined) unit inter-story space. The space between the unit floors is a sound absorbing space surrounded by the sound absorbing material. In this case, since the sound absorbing space can absorb and attenuate the sound by each sound absorbing material, the floor impact sound transmitted from the upper floor to the lower floor through the interstory space (sound absorbing space) is reduced. be able to.

  In addition, since the sound absorbing space is surrounded by a sound absorbing material, it is possible to suppress the diffusion of sound to each unit floor space adjacent to the sound absorbing space. In this case, since the diffusion of sound in the interstory space can be further suppressed, it is possible to further suppress the floor impact sound from the upper floor part from being widely transmitted to the lower floor part through the interstory space.

  The sound absorbing structure for a building according to a fourth aspect of the present invention is the sound absorbing structure for a building according to the third aspect, wherein the lower floor is provided with a lower floor room as a space below the ceiling surface material, and is located above the lower floor room. The space between the unit floors is the sound absorption space.

  According to the present invention, since the inter-unit space located above the lower floor room is a sound absorbing space, the floor impact sound from the upper floor is absorbed and attenuated in the sound absorbing space, It will be transmitted to the lower-floor room. Thereby, it is possible to reduce the floor impact sound transmitted to the lower floor room where the resident often stays.

  In the sound absorbing structure for a building of the fifth invention, in the third or fourth invention, the upper floor is provided with a sound generation space that is either an upper-floor room or a hallway as an upper space of the floor material. The space between the unit floors located below the sound generation space is the sound absorption space.

  In a room or hallway where a resident stays or moves, floor impact sound is likely to be generated compared to other rooms. Therefore, in the present invention, in view of this point, the unit interstory space located below either the room (upper room) or the hallway (sound generation space) provided on the upper floor is used as the sound absorption space. In this case, when a floor impact sound is generated in the sound generation space, the sound is absorbed and attenuated in the lower sound absorption space portion, so that floor impact sound transmitted from the sound generation space to the lower floor portion is suitably suppressed. Can do.

  The sound absorbing structure for a building according to a sixth aspect of the present invention is the sound absorbing structure for a building according to any one of the first to fifth aspects, wherein the lower floor portion is provided with a lower floor room as a space below the ceiling surface material, Is provided with a sound generation space that is either an upper floor room or a hallway as an upper space of the floor material, and the sound generation space is disposed at a position different from a position directly above the lower floor room, As the unit floor space, a first unit floor space is provided above the lower floor room, and a second unit floor space is provided below the sound generation space. The boundary inter-storey large beam section that divides the second unit inter-floor space section between the inter-space section and the second unit inter-floor space section includes each groove section of the lower-floor ceiling large beam and the upper-floor large beam. The sound-absorbing material is disposed on the surface.

  By the way, even if the room (upper floor room) and corridor provided on the upper floor are arranged at a position different from the position directly above the room (lower floor room) provided on the lower floor The floor impact sound generated in the upper floor room or hallway may be transmitted to the lower floor room through the space between the floors. Therefore, in the present invention, in view of this point, a space between unit floors (hereinafter referred to as a first unit floor space) located above a lower floor room provided in the lower floor, and an upper floor is provided. The second unit interstitial space between the unit interstitial space (hereinafter referred to as the second unit interstitial space) located below either the upper floor room or the corridor (sound generating space). A sound absorbing material is disposed in each groove portion of the lower-floor ceiling girder and the upper-floor girder constituting the same girder portion with respect to the partitioning inter-story girder portion. In this case, since the floor impact sound diffused from the second unit interstitial space part to the first unit interstitial space part can be absorbed by the sound absorbing material, the diffusion of the sound can be suppressed. Thereby, it is possible to suppress the floor impact sound generated in the sound generation space from being transmitted to the lower floor room through the interstory space (specifically, the first and second unit interstitial spaces).

  The sound absorbing structure for a building according to a seventh aspect of the present invention is the sound absorbing structure for a building according to any one of the first to sixth aspects, wherein at least one of the lower-floor ceiling girder and the upper-floor girder constituting the boundary inter-storey girder portion. A beam through hole is formed, and the sound absorbing material is disposed in the groove portion of the large beam in which the beam through hole is formed, so as to block the beam through hole. To do.

  A beam through-hole may be formed in the lower-floor ceiling girder and upper-floor girder constituting the boundary inter-story girder in the interstory space to allow wiring, piping, and the like to pass therethrough. In this case, the sound is easily diffused between the adjacent unit floor spaces through the beam through holes (easy to leak). Therefore, in the present invention, in view of this point, a sound absorbing material is placed in the groove portion of the large beam in which the beam through hole is formed among the lower floor ceiling large beam and the upper floor large beam constituting the boundary floor large beam portion. It arrange | positions so that it may block. Thereby, the spreading | diffusion (sound leakage) of the sound through a beam through-hole can be suppressed suitably.

The perspective view which shows the outline | summary of a unit type building. The perspective view which shows the structure of a building unit. (A) is a top view which shows the floor plan of the 1st floor part, (b) is a top view which shows the floor plan of the 2nd floor part. The longitudinal cross-sectional view which shows the structure around a floor part. The figure for demonstrating the arrangement | positioning state of glass wool. The longitudinal cross-sectional view which shows the floor area periphery in other embodiment. (A) is a figure which shows the outline | summary of the unit type building in other embodiment, (b) is a longitudinal cross-sectional view which shows the floor area periphery in the building.

  Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings. In the present embodiment, the present invention is embodied in a two-story unit type building having a steel frame ramen structure. FIG. 1 is a perspective view showing an outline of a unit type building, and FIG. 2 is a perspective view showing a configuration of a building unit 20.

  As shown in FIG. 1, a building 10 such as a house includes a building body 12 provided on a foundation 11 and a roof portion 13 provided above the building body 12. The building body 12 is a two-story building having a first floor portion 14 as a lower floor portion and a second floor portion 15 as an upper floor portion, and is configured by connecting a plurality of building units 20 to each other. The building unit 20 is manufactured in advance in a manufacturing factory, and then transported to a construction site by a truck or the like.

  In the following description, the building unit 20 constituting the first floor portion 14 is also referred to as “lower floor unit 20A”, and the building unit 20 constituting the second floor portion 15 is also referred to as “upper floor unit 20B”. Further, the lower floor unit 20A and the upper floor unit 20B are arranged in a one-to-one relationship in the vertical direction.

  FIG. 2 shows a perspective view of the building unit 20. As shown in FIG. 2, the building unit 20 includes four columns 21 disposed at the four corners thereof, and four ceiling beams 22 and floor beams 23 that connect the upper end portion and the lower end portion of each column 21, respectively. And. In this case, a rectangular frame (frame) is formed by the pillars 21, the ceiling beams 22 and the floor beams 23. The column 21 is made of a square tube-shaped square steel. The ceiling girder 22 and the floor girder 23 are made of channel steel having a U-shaped cross section, and are installed with the grooves 22a and 23a facing inward in the horizontal direction. The ceiling beam 22 (specifically, its web) is provided with beam through holes 22b at a plurality of locations.

  A plurality of small ceiling beams 25 are bridged between the large ceiling beams 22 on the long sides of the building unit 20 at predetermined intervals. Similarly, a plurality of floor beams 26 are bridged at predetermined intervals between the opposing large floor beams 23 on the long sides of the building unit 20. The ceiling beam 25 and the floor beam 26 are provided at the same interval and at positions corresponding to the upper and lower sides, respectively. For example, the ceiling beam 25 is made of lip groove steel, and the floor beam 26 is made of square steel. The ceiling member 27 is supported by the ceiling beam 25 and the floor member 28 is supported by the floor beam 26.

  Next, the floor plan of the building 10 will be described. 3A is a plan view showing a floor plan of the first floor portion 14, and FIG. 3B is a plan view showing a floor plan of the second floor portion 15.

  First, the floor plan of the first floor portion 14 will be described. As shown in FIG. 3A, the first floor portion 14 includes an entrance 31, an entrance hall 32, a living dining room 33 (LD), a kitchen 34, and a bathroom 35 as an indoor space (first floor space). A washroom 36, a toilet 37, and a corridor 38 are provided. The living dining room 33 is provided continuously with the kitchen 34 and forms a continuous space together with the kitchen 34. The living dining room 33 is formed so as to straddle the interiors of two adjacent building units 20 (that is, the lower floor unit 20A) with their facets (side surfaces on the long side) facing each other. Specifically, the living dining room 33 includes the entire interior space of the lower floor unit 20A disposed on the outdoor side of the two lower floor units 20A and a part of the internal space of the lower floor unit 20A disposed on the indoor side. It is formed using. The living dining room 33 corresponds to the lower-floor room.

  Next, the floor plan of the second floor portion 15 will be described. As shown in FIG. 3B, the second floor portion 15 is provided with a living room 41, a bedroom 42, a toilet 43, and a corridor 44 as an indoor space (second floor space). The living room 41 is used as a child room. In the living room 41, a learning desk 47, a bed 48, and the like used by children are provided. The living room 41 is located above (directly above) the living dining room 33 on the first floor portion 14. The living room 41 is formed so as to straddle the inside of two adjacent building units 20 (that is, the upper floor unit 20B) with their girder surfaces (side surfaces on the long side) facing each other. The upper space unit 20B is formed using the entire internal space. Further, these two upper floor units 20 </ b> B are respectively disposed above the two lower floor units 20 </ b> A that form the living dining room 33. The room 41 corresponds to the upper floor room and the sound generation space.

  The hallway 44 leads to the living room 41 and the bedroom 42, respectively, and also leads to a staircase 39 extending to the first floor portion 14. The corridor 44 is formed with a relatively wide space that can also be used as a hall, and a desk 49 is provided on the wall. The corridor 44 corresponds to a sound generation space.

  The corridor 44 is formed using the internal space (specifically, a part thereof) of one upper floor unit 20B. The upper floor unit 20B that forms the corridor 44 is adjacent to the upper floor unit 20B that is disposed on the indoor side among the two upper floor units 20B that form the living room 41, with the facets facing each other. .

  Next, the configuration of the inter-floor portion between the first floor portion 14 and the second floor portion 15 will be described with reference to FIG. FIG. 4 is a longitudinal sectional view showing a configuration around the interstitial portion. Note that FIG. 4 corresponds to a cross-sectional view in which the vicinity of the floor portion is cut along the line AA in FIG. 3A and the line BB in FIG. 3B.

  As shown in FIG. 4, the first-floor space portions 31 to 38 of the first-floor portion 14 and the second-floor space portions 41 to 44 of the second-floor portion 15 are partitioned vertically by an inter-floor portion 16. The inter-floor portion 16 includes a ceiling portion of the first-floor space portions 31 to 38 and a floor portion of the second-floor space portions 41 to 44.

  As a configuration of the ceiling portion of the first floor space portions 31 to 38 in the inter-floor portion 16, the lower surface of the ceiling large beam 22 of the lower floor unit 20 </ b> A (hereinafter, this symbol is denoted by “A”) 51 is attached. A ceiling member 27 is fixed to the lower surface of the field edge 51 with screws or the like. The ceiling member 27 is composed of two plaster boards that are stacked. In addition, a ceiling connecting surface material 52 that connects both the ceiling surface materials 27 is provided between the adjacent ceiling surface materials 27. The ceiling connecting surface material 52 is composed of the same two-layered gypsum board as the ceiling surface material 27, and has the same thickness as the ceiling surface material 27. The ceiling connecting face material 52 is disposed across the lower surface of the field edge 51 of each adjacent ceiling beam 22A of the adjacent lower floor unit 20A, and is fixed to the field edge 51 with a screw or the like. The ceiling beam 22A corresponds to the lower-floor ceiling beam.

  As a configuration of the floor portion of the second-floor space portions 41 to 44 in the inter-story portion 16, a joist 54 is provided along the floor beam 23B on the upper surface of the floor beam 23 (hereinafter referred to as B) of the upper floor unit 20B. Is provided. The floor material 28 is fixed to the upper surface of the joist 54 with screws or the like. The floor material 28 is made of a particle board. Further, a floor connecting surface material 55 that connects the two floor surface materials 28 is provided between the adjacent floor materials 28. The floor connecting surface material 55 is composed of the same particle board as the floor surface material 28, and has the same thickness as the floor surface material 28. The floor connecting surface material 55 is disposed across the upper surface of the joists 54 of the adjacent floor beams 23B of the adjacent upper floor units 20B, and is fixed to the joists 54 with screws or the like. The floor girder 23B corresponds to the upper floor girder.

  In the inter-floor portion 16, the space between the ceiling surface materials 27 and 52 of the first floor space portions 31 to 38 (first floor portion 14) and the floor surface materials 28 and 55 of the second floor space portions 41 to 44 (second floor portion 15) is a floor. It is an interspace 18. The interstory space 18 is formed to extend in the horizontal direction across the plurality of lower floor units 20A and upper floor units 20B. The interstory space 18 is partitioned from the first floor space portions 31 to 38 by the ceiling surface materials 27 and 52, and is partitioned from the second floor space portions 41 to 44 by the floor surface materials 28 and 55.

  In this case, the first floor space portions 31 to 38 correspond to the space below the ceiling surface materials 27 and 52 in the first floor portion 14, and the second floor space portions 41 to 44 are above the floor surface materials 28 and 55 in the second floor portion 15. It corresponds to space.

  A partition wall 57 that partitions the living room 41 and the hallway 44 is provided on the second floor portion 15. The living dining room 33 on the first floor portion 14 and the living room 41 on the second floor portion 15 are separated from the outside by an outer wall portion 58. The outer wall 58 has an outer wall panel 61 and an inner wall panel 62 on the first floor portion 14 and the second floor portion 15, respectively. Between the outer wall panel 61 and the inner wall panel 62, an in-wall heat insulating material (not shown) made of glass wool. Is arranged.

  Next, the internal configuration of the interstory space 18 will be described in detail.

  In the interstory space 18, for the lower floor unit 20 </ b> A and the upper floor unit 20 </ b> B that are vertically adjacent to each other, the ceiling beam 22 </ b> A of the lower floor unit 20 </ b> A and the floor beam 23 </ b> B of the upper floor unit 20 </ b> B are vertically opposed to each other. Yes. Specifically, the (four) ceiling girder 22A of the lower floor unit 20A and the (four) floor girder 23B of the upper floor unit 20B are arranged to face each other vertically. In this case, at the boundary between the lower floor unit 20A and the upper floor unit 20B adjacent to each other in the vertical direction (hereinafter also referred to as a unit boundary section), the interstitial large beam portion 65 composed of the ceiling beam 22A and the floor beam 23B that are vertically opposed is four sides. Is arranged.

  At the unit boundary, a unit interstitial space 67 is formed that is partitioned by a plurality of (four sides) interstitial beam portions 65. The unit inter-story space 67 is a space surrounded by the plurality of inter-story beams 65 between the ceiling member 27 of the lower unit 20A and the floor member 28 of the upper unit 20B. The unit interstitial space 67 is formed for each unit boundary in the interstitial space 18. In other words, the interstory space 18 is partitioned into a plurality of unit interstitial space parts 67 for each unit boundary part by the interstory beam 65.

  In each inter-storied large beam part 65 surrounding the unit inter-story space part 67, each of the groove parts 22a and 23a of the ceiling girder 22A and the floor girder 23B constituting the girder part 65 is opened toward the unit inter-story space part 67. . In this case, a pair of inter-story beam portions 65 are arranged adjacent to each other at the boundary portion between the adjacent unit inter-story space portions 67, and one of the pair of inter-story beam portions 65 constitutes one inter-story beam portion 65. The ceiling girder 22A and floor girder 23B and the ceiling girder 22A and floor girder 23B constituting the other interstitial girder 65 have their grooves 22a and 23a facing away from each other (in other words, with their webs facing each other). It is arranged.

  In the following description, a sign is added to the sign of the interstitial large beam part 65 arranged at the boundary part of the adjacent unit interstory space part 67, and the interstory girder part 65 disposed on the outer peripheral part of the building 10. B is added to the symbol of. In this case, the interstitial large beam part 65a corresponds to the boundary interstitial large beam part, and the interstory large beam part 65b corresponds to the outdoor side interstitial large beam part.

  By the way, in this building 10, glass wool is disposed as a sound absorbing material in each of the grooves 22a and 23a of the ceiling beam 22A and the floor beam 23B constituting the interstory beam 65, thereby constructing a sound absorbing structure in the interstitial space 18. doing. In the following, such a sound absorbing structure will be described with reference to FIG. 5 in addition to FIG. FIG. 5 is a view for explaining the arrangement state of glass wool. In FIG. 5, the interstitial large beam portions 65 a. 65b is shown with a dot hatch.

  As shown in FIGS. 4 and 5, among the unit inter-floor space portions 67 formed in the inter-floor portion 16, 2 located between the living dining room 33 in the first-floor portion 14 and the room 41 in the second-floor portion 15. With respect to the unit inter-story space portions 67a and 67b, glass wool 69 is disposed in each of the groove portions 22a and 23a of the ceiling large beam 22A and the floor large beam 23 that constitute each inter-story large beam portion 65 provided in the periphery thereof. Glass wool 69 is a sound absorbing material having excellent sound absorbing performance. The glass wool 69 is formed in a long shape along the large beams 22A and 23B, and is disposed over the entire longitudinal direction of the large beams 22A and 23B. Further, the glass wool 69 is disposed so as to fill the groove portions 22a and 23a, and in contact with the upper and lower flanges and the web surrounding the groove portions 22a and 23a of the large beams 22A and 23B, respectively. . Accordingly, the glass wool 69 disposed in the groove 22a of the ceiling beam 22A is disposed in a state where the beam through hole 22b formed in the web is closed.

  Of the inter-unit space portions 67a and 67b, the inter-unit space portion 67a is located on the outdoor side (as viewed in the short side direction of the unit), and the inter-unit space portion 67b is located on the indoor side. . The unit inter-story space 67b corresponds to a first unit inter-story space.

  In the above configuration, each unit inter-story space 67a, 67b is surrounded by glass wool 69 that is disposed around each of the inter-story large beams 65a, 65b (ceiling beam 22A and floor beam 23). Yes. Therefore, these inter-unit space portions 67a and 67b are sound absorbing space portions. Of the interstitial beam portions 65a and 65b, the glass wool 69 disposed on the outdoor interstitial beam portion 65b is used not only as a sound absorbing material but also as a heat insulating material. That is, this glass wool 69 is also used as an in-beam heat insulating material that suppresses the ceiling large beam 22A and the floor large beam 23B from becoming thermal bridges.

  As the sound absorbing material, glass wool 69 is not necessarily used, and other sound absorbing materials such as rock wool and felt may be used.

  A unit inter-story space 67 (hereinafter referred to as “c”) is located below the corridor 44 of the second floor part 15 and is adjacent to the unit inter-story space 67b. Of the inter-story girder portions 65a and 65b surrounding the unit inter-story space part 67c, the interstory girder part 65a arranged on the unit inter-story space part 67b side, that is, the boundary part between the adjacent unit inter-story space parts 67b and 67c. Glass wool 69 (corresponding to a sound absorbing material) is disposed in each of the groove portions 22a and 23a of the ceiling large beam 22A and the floor large beam 23B. The glass wool 69 is formed in a long shape along the large beams 22A and 23B, and is disposed over the entire longitudinal direction of the large beams 22A and 23B. In this case, glass wool 69 is provided in each of the groove portions 22a and 23a of the ceiling large beam 22A and the floor large beam 23B in the pair of inter-storey large beam portions 65a arranged adjacent to each other at the boundary portion between the adjacent unit inter-floor space portions 67b and 67c. It is arranged. The unit floor space 67c corresponds to the second unit floor space.

  Of the inter-story beam portions 65a and 65b in the inter-story portion 16, all of the outdoor inter-story beam portions 65b (that is, the inter-story beam portions 65b around the unit inter-story space portions 67a and 67b described above). Glass wool 69 is disposed in each of the grooves 22a and 23a of the ceiling beam 22A and the floor beam 23B. These glass wools 69 are not only used as sound absorbing materials but also used as heat insulating materials, and more specifically, used as in-beam heat insulating materials for suppressing the thermal bridges of the large beams 22A and 23B.

  As mentioned above, according to the structure of this embodiment explained in full detail, the following outstanding effects are acquired.

  Regarding the interstory large beam portion 65a located at the boundary between adjacent unit interstitial space portions 67, glass wool 69 is disposed as a sound absorbing material in each of the groove portions 22a and 23a of the ceiling girder 22A and the floor girder 23B constituting the girder portion 65a. Set up. In this case, since the glass wool 69 is arranged facing the one unit inter-level space portion 67 among the unit inter-level space portions 67 at the boundary portion between the adjacent unit inter-level space portions 67, the inter-level space 18 The sound diffused from the one unit floor space 67 to the other unit floor space 67 can be absorbed by the glass wool 69. Thereby, since the diffusion of sound in the interstitial space 18 can be suppressed, the floor impact sound generated in the second floor part 15 (second floor space part) passes through the interstitial space 18 to the first floor part 14 (first floor space part). It can be suppressed from being widely transmitted.

  By the way, in the boundary part of the adjacent unit floor space part 67 (for example, the boundary part of the adjacent unit floor space parts 67a and 67b, and the boundary part of the adjacent unit floor space parts 67b and 67c), between these unit floors. A pair of interstitial beam portions 65a that divide the space portion 67 are disposed adjacent to each other. In this case, in the pair of interstitial beam portions 65a, the groove portions 22a and 23a of the ceiling beam 22A and the floor beam 23B are opened toward the unit inter-story space portions 67, respectively. Therefore, in the above embodiment, in view of this point, the glass wool 69 is disposed in each of the groove portions 22a and 23a of the ceiling large beam 22A and the floor large beam 23B with respect to the pair of inter-storey large beam portions 65a. In this case, since the glass wool 69 is disposed to face each of the adjacent unit interstitial space portions 67, the sound diffused from one to the other among the adjacent unit interstitial space portions 67, and from the other to one Each of the diffused sounds can be absorbed by the glass wool 69. Thereby, since the diffusion of the sound in the interstory space 18 can be suppressed in both directions, the floor impact sound generated in the second floor part 15 is suitably suppressed from being widely transmitted to the first floor part 14 through the interstitial space 18. be able to.

  Glass wool 69 is disposed in each of the groove portions 22a and 23a of the ceiling large beam 22A and the floor large beam 23B for each of the inter-storey large beam portions 65a and 65b surrounding the unit inter-story space portions 67a and 67b (four sides). In this case, these unit inter-story spaces 67 a and 67 b are sound absorbing spaces surrounded by glass wool 69. As a result, in the sound absorbing space (unit floor space 67a, 67b), the sound can be absorbed and attenuated by each glass wool 69, so that the space 18 (sound absorbing) from the second floor portion 15 to the first floor portion 14. The floor impact sound transmitted through the space portion can be reduced.

  Moreover, since the sound absorbing space (unit space 67a, 67b) is surrounded by glass wool 69, sound is diffused to each unit space 67 adjacent to the sound absorbing spaces 67a, 67b. Can be suppressed. In this case, since the diffusion of sound in the interstory space 18 can be further suppressed, it is possible to further suppress the floor impact sound from the second floor part 15 from being widely transmitted to the first floor part 14 through the interstitial space 18. it can.

  Since the unit interstitial spaces 67a and 67b located above (directly above) the living dining room 33 are used as sound absorbing spaces, the floor impact sound from the second floor portion 15 is absorbed and attenuated by the spaces 67a and 67b. Later, it is transmitted to the living dining room 33. Thereby, the floor impact sound transmitted to the living dining room 33 where a resident often stays can be reduced.

  Since the room 41 of the second floor portion 15 is a place where a resident stays, it is considered that a floor impact sound is likely to be generated as compared with other rooms (for example, the toilet 43). In particular, when the living room 41 is used as a children's room, it is considered that it becomes remarkable. Therefore, in the above embodiment, in view of this point, the unit interstitial space portions 67a and 67b located below (directly below) the living room 41 are used as sound absorbing space portions. In this case, when a floor impact sound is generated in the room 41, the sound is absorbed and attenuated in the lower unit interstitial spaces 67a and 67b (that is, the sound absorbing space), so that the floor is transmitted from the room 41 to the first floor part 14. Impact noise can be suitably suppressed.

  Since the corridor 44 of the second floor portion 15 is a moving space used when a resident moves, it is considered that a floor impact sound is likely to be generated. Here, even if the corridor 44 is arranged at a position different from the position directly above the living dining room 33 on the first floor portion 14, if a floor impact sound is generated in the corridor 44, the floor impact sound is generated. May be transmitted to the living dining room 33 through the space 18 between the floors. Therefore, in the above embodiment, in view of this point, the unit interstitial space 67c located below (directly below) the corridor 44 and the unit interstitial space 67b located above (directly above) the living dining room 33. Glass wool 69 is disposed in each of the groove portions 22a and 23a of the ceiling large beam 22A and the floor large beam 23B with respect to the inter-storey large beam portion 65a that divides the unit inter-story space portion 67c in the space (boundary portion). In this case, since the floor impact sound diffused from the unit interstitial space 67c to the unit interstitial space 67b can be absorbed by the glass wool 69, the diffusion of the sound can be suppressed. Thereby, it is possible to suppress the floor impact sound generated in the corridor 44 from being transmitted to the living dining room 33 through the interstory space 18 (specifically, the unit interstitial spaces 67b and 67c).

  Glass wool 69 was disposed in the groove portion 22a of the ceiling beam 22A constituting the interstory beam 65a so as to block the beam through hole 22b formed in the ceiling beam 22A. In this case, diffusion (sound leakage) of sound (floor impact sound) through the beam through hole 22b can be suitably suppressed.

  The present invention is not limited to the above embodiment, and may be implemented as follows, for example.

  In the above embodiment, each of the unit inter-story spaces 67a and 67b located below the living room 41 is a sound absorbing space, but only one of these unit inter-story spaces 67a and 67b is a sound absorbing space. It is good also as a part. Further, the unit floor space 67c located below the corridor 44 may be a sound absorbing space. In this case, when a floor impact sound is generated in the corridor 44, the sound is absorbed and attenuated in the unit inter-floor space portion 67c. Therefore, the floor is transmitted from the corridor 44 to the first floor portion 14 (first floor space portions 31 to 38). Impact noise can be suitably suppressed.

  The glass wool 69 is arranged only for the interstitial beam 65 (specifically, the ceiling beam 22A and the floor beam 23B) located at the outer periphery of both unit floor spaces 67a and 67b (entire) located below the living room 41. You may make it install. Also in this case, since the entire unit interstitial spaces 67a and 67b are surrounded by the glass wool 69, the floor impact sound can be suitably absorbed (attenuated) in these unit interstitial spaces 67a and 67b.

  The glass wool 69 should not be provided to the inter-storied large beam part 65a that divides the unit inter-story space part 67b among the pair of inter-story large beam parts 65a adjacent at the boundary between the adjacent unit inter-story space parts 67b and 67c. It may be. Even in that case, the diffusion of sound from the unit interstitial space part 67c to the unit interstitial space part 67b can be suppressed by the glass wool 69 provided in the interstory large beam part 65a that divides the unit interstory space part 67c. The floor impact sound from the corridor 44 can be prevented from being transmitted to the living dining room 33 through the unit inter-floor spaces 67b and 67c.

  A beam through hole may be provided in the floor large beam 23B instead of or in addition to the beam through hole 22b provided in the ceiling large beam 22A. In that case, the glass wool 69 may be disposed in the groove 23a of the floor beam 23B so as to block the beam through hole.

  A predetermined gap (gap between the beams) is formed between the ceiling beam 22A and the floor beam 23B that are vertically opposed to each other in the inter-floor beam portion 65. Glass wool is also disposed as a sound absorbing material between the beam spaces. It may be. In that case, it is possible to further suppress the diffusion of sound between the adjacent unit floor spaces 67.

  For example, as shown in FIG. 6, glass wool 71 as a ceiling sound absorbing material may be disposed above the ceiling surface material 27 of the lower floor unit 20 </ b> A in the unit floor space portions 67 a and 67 b including the sound absorbing space portion. The glass wool 71 has a plate shape having a predetermined thickness, and is disposed along the ceiling surface material 27. The glass wool 71 is in contact with the glass wool 69 disposed in the groove portion 22a of the ceiling beam 22A at the end thereof. Specifically, the glass wool 71 is in contact with each glass wool 69 disposed on the four-side ceiling girder 22A surrounding the unit inter-story space portions 67a and 67b. That is, the glass wool 71 is provided continuously with each glass wool 69.

  According to such a configuration, since sound can be absorbed by the glass wool 71 in addition to the glass wool 69 in the sound absorbing space (unit floor space 67a, 67b), the sound absorbing space is transferred from the second floor portion 15 to the first floor portion 14. The impact sound transmitted through the part can be further reduced. Further, an improvement in the sound absorption effect due to the glass wool 71 being continuous with the glass wool 69 can be expected. In addition to the glass wool 71, other sound absorbing materials such as rock wool may be used as the ceiling sound absorbing material.

  -In the building 75 shown to Fig.7 (a), one upper floor unit 20B is set back (retracted) with respect to the lower floor unit 20A arrange | positioned in the downward direction. In this case, a unit inter-story space 77 is formed at the boundary between the lower floor unit 20A and the upper floor unit 20B adjacent to each other in the vertical direction. An interstory large beam part 79 is provided at the boundary between the unit interstitial space part 77 and the unit interstory space part 78 adjacent to the unit interstory space part 77, and the ceiling constituting the interstory large beam part 79 is provided. Glass wool 69 is disposed in each of the grooves 22a and 23a of the large beam 22A and the floor large beam 23A. Also in this case, since the sound diffused from the unit interstitial space 77 to the unit interstitial space 78 can be absorbed by the glass wool 69, the diffusion of the floor impact sound in the interstitial space 18 can be suppressed. .

  Further, in the configuration of this example, the set-backed upper floor beam 23B of the upper floor unit 20B is arranged inwardly (inner side of the unit) from the outdoor ceiling beam 22A of the lower floor unit 20A. 22A and 23B are not arranged to face each other up and down. In such a configuration, glass wool 69 is disposed in the groove portions 22a and 23a of the respective large beams 22A and 23B. As a result, the glass wool 69 is disposed in each of the groove portions 22a and 23a of the four-side ceiling beam 22A and the floor beam 23 surrounding the unit inter-story space 77.

  DESCRIPTION OF SYMBOLS 10 ... Building, 14 ... First floor part as lower floor part, 15 ... Second floor part as upper floor part, 16 ... Interstitial part, 18 ... Interstitial space, 20 ... Building unit, 20A ... Lower floor unit, 20B ... Upper floor unit, 22A: Ceiling beam as lower ceiling beam, 22a: Groove, 22b ... Beam through-hole, 23B ... Floor beam as lower floor beam, 23a ... Groove, 27 ... Ceiling material, 28 ... Floor surface Material 33: Living dining room as lower-floor room, 41: Living room as upper-floor room, 44: Corridor as sound generating space, 65: Inter-story beam, 65a ... Inter-story beam as boundary beam , 67 ... Unit interstitial space part, 67b ... Unit interstitial space part as first unit interstitial space part, 67c ... Unit interstory space part as second unit interstitial space part, 69 ... Glass wool as sound absorbing material .

Claims (6)

A lower floor and an upper floor adjacent above the lower floor,
The lower floor portion is configured by arranging a plurality of lower floor units in parallel,
The upper floor is configured by a plurality of upper floor units arranged side by side,
In the inter-floor portion between the lower floor portion and the upper floor portion, an inter-floor space that is a space between the ceiling floor material of the lower floor portion and the floor surface material of the upper floor portion is formed. And
In the interstitial space, the lower-floor ceiling beam of the lower-floor unit and the upper-floor beam of the upper-floor unit are opposed to each other in the vertical direction, and the inter-floor beam is formed by the opposed beams. ,
The inter-story space is divided into a plurality of unit inter-story space parts by the inter-story large beam part for each unit boundary part of the lower floor unit and the upper floor unit adjacent vertically.
The lower floor ceiling girder and the upper floor girder constituting the floor between the girders portion are both applied to the unitary housing detached consisting shaped steel having a groove which is open to said unit between floors space,
The interstory large beam part located at the boundary part of the adjacent unit interstory space part is a boundary interstory large beam part,
At the boundary part of the adjacent unit interstory space part, a pair of boundary interstitial beam portions that divide each unit interstory space part are arranged adjacent to each other,
There is no wall in at least one of the lower position of the pair of boundary floor beams in the lower floor and the upper position of the pair of boundary floor beams in the upper floor,
Sound absorbing structure of the building, wherein the respective the pair of boundary between floors girder section, the lower floor ceiling girders and the respective sound absorbing material in the grooves of the upper floor girder are disposed along their girders. A predetermined unit inter-story space part among the plurality of unit inter-story space parts is surrounded by a plurality of inter-story girder parts including the boundary inter-story girder part,
In each of the plurality of inter-story girder parts, the sound absorbing material is disposed along the girder in each groove of the lower-story ceiling girder and the upper-story girder so that the predetermined unit inter-story space part is The sound absorbing structure for a building according to claim 1, wherein the sound absorbing space is surrounded by a sound absorbing material. The lower floor is provided with a lower floor room as a space below the ceiling surface material,
The sound absorbing structure for a building according to claim 2 , wherein the unit inter-story space located above the lower floor room is the sound absorbing space. The upper floor is provided with a sound generation space that is either an upper floor room or a hallway as an upper space of the floor material,
The sound absorbing structure for a building according to claim 2 or 3, wherein the space between the unit floors located below the sound generating space is the sound absorbing space. The lower floor is provided with a lower floor room as a space below the ceiling surface material,
The upper floor is provided with a sound generation space that is either an upper floor room or a hallway as an upper space of the floor material,
The sound generation space is arranged at a position different from the position directly above the lower floor room,
As the unit floor space, a first unit floor space is provided above the lower floor room, and a second unit floor space is provided below the sound generation space,
The boundary inter-story large beam section that divides the second unit inter-story space part between the first unit inter-story space part and the second unit inter-story space part includes the lower floor ceiling girder and the upper floor. The sound absorbing structure for a building according to any one of claims 1 to 4 , wherein the sound absorbing material is disposed in each groove portion of the floor beam. A beam through-hole is formed in at least one of the lower-floor ceiling girder and the upper-floor girder constituting the boundary inter-story girder portion,
Wherein said groove girders of the beam through holes are formed among the girders are any of claims 1 to 5, characterized in that said sound absorbing material is disposed so as to block the beam through holes The sound absorbing structure for a building according to one item.

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