JP2015014095A - Floor structure of building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor structure of a building capable of suitably constructing the floor structure of high sound insulation performance.SOLUTION: The floor structure of the building is constituted of a plurality of floor units 20. The floor units 20 comprise a plurality of joist frames 26 mutually juxtaposed at an interval and arranged so as to extend in the same direction, a receiving member 40 extended by crossing with the longitudinal direction of the joist frames 26, a plate-like floor backing material 27 fixed on the joist frames 26 and the receiving member 40 and a sound insulation member 45 for superposing an upper surface on a bottom surface of the floor backing material 27 in a state of being placed on the receiving member 40 between the plurality of joist frames 26.

Description

  The present invention relates to a floor structure of a building.

  In a building such as a house, a technique for providing a sound insulating member capable of blocking sound transmission in the floor has been proposed as a configuration for improving the sound insulating performance of the floor. For example, in Patent Document 1, joists and buffer layers arranged side by side are provided between a pair of upper and lower plate-like hard layers, and a floor finish is provided on the upper hard layer. The structure that the floor base material is provided under the lower hard layer is disclosed. In this configuration, the buffer layer plays a role as a sound insulating member.

JP 2012-107378 A

  In the configuration in which the sound insulating member is provided between the floor base material and the floor finishing material as described above, the height position of the floor finishing material with respect to the floor base material is defined by the thickness dimension of the sound insulating member. There is a concern that the floor surface is set at a higher position by the thickness dimension of the sound insulation member, and the ceiling height is lowered accordingly. Therefore, it is conceivable that the ceiling height is not lowered by lowering the height position of the floor base material in accordance with the thickness dimension of the sound insulating member. However, in order to lower the height position of the floor base material, it is necessary to change the design related to the floor structure, which increases the work at the design stage.

  This invention is made | formed in view of the said situation, and makes it the main objective to construct | assemble the floor structure with high sound-insulation performance suitably.

  Hereinafter, means and the like effective for solving the above-described problems will be described while showing functions and effects as necessary.

  A floor structure of a building according to a first aspect of the present invention includes a plurality of floor joists arranged so as to be spaced apart from each other and extending in the same direction, and a receiving member that extends across the longitudinal direction of the floor joists And a plate-like floor base material fixed on the floor joist and the receiving member, and the upper surface is superimposed on the bottom surface of the floor base material in a state of being placed on the receiving member between the plurality of floor joists. And a sound insulation member.

  According to the first invention, since the sound insulation members and floor joists are alternately arranged side by side below the floor base material, the sound insulation members can be provided without being restricted in the height direction of the floor portion. Moreover, about the structure by which a sound insulation member is attached to the lower surface of a floor surface material, the design regarding a floor part can be facilitated.

  Moreover, the installation of the heavy sound insulation member is completed simply by placing it on the receiving member, and the workability of the floor structure is improved.

  The receiving member of the floor structure of the building of the second invention is a direction orthogonal to the longitudinal direction of the floor joists and has a concave portion for interposing a sound insulating member between the adjacent floor joists, The member is formed of a material that is compressed and deformed by receiving a load from the floor base material, and has a thickness dimension larger than a depth dimension of the concave portion.

  According to the second aspect of the present invention, the thickness of the sound insulating member that is formed of a compressible and deformable material and is mounted on the concave portion of the receiving member is formed larger than the depth of the concave portion. When the floor base material is fixed on the member, the sound insulating member is compressed by the load from the floor base material. Therefore, when the sound insulation member is superimposed on the bottom surface of the floor base material, the sound insulation member is in close contact with the floor base material. Thereby, the absorption effect of the floor impact sound added to a floor structure can be acquired more suitably.

  The receiving member of the floor structure of the building of the third invention has a placing portion placed on the upper surface of the floor joist, and the placing portion is configured such that the floor joist and the floor base material are fixed, It is sandwiched between the upper surface of the joist and the bottom surface of the floor base material.

  According to the third aspect of the invention, since the placing portion that is a part of the receiving member is sandwiched between the floor joist and the floor base material, the lateral displacement of the receiving member placed on the floor joist is prevented. This makes it possible to facilitate the fixing operation between the members by screwing or the like.

  A floor structure of a building of a fourth invention includes a frame portion having a plurality of joists frames constituting the floor joists, and uses a plurality of floor units in which a floor base material is fixed on the frame portions. The floor units of the building are arranged side by side and the joist frames of each floor unit are connected to each other, and the receiving member is located at least on the side of the frame arrangement direction among the plurality of joist frames. It is placed on two joist frames including the joist frame, and in each adjacent floor unit, each receiving member is placed at a position shifted in the longitudinal direction of the floor joists.

  According to the fourth invention, the receiving member is placed between two joist frames including at least a joist frame located on the side in the frame arrangement direction among the plural joist frames. And when connecting an adjacent floor unit, the position of the receiving member of each floor unit is shifted and arrange | positioned alternately at a longitudinal direction. Thereby, when connecting adjacent floor units, interference of the receiving members which each floor unit has can be avoided.

  In the floor structure of the building according to the fifth aspect of the present invention, in the floor unit, a receiving member is placed on a joist frame located on a side portion in the frame arrangement direction among a plurality of joist frames, and one of the receiving members. The portion protrudes to the side of the floor base material and is visible.

  According to the fifth invention, in the floor unit, since a part of the receiving member protrudes to the side of the floor base material, the position of the receiving member placed on the frame portion is confirmed from the upper side of the floor base material. It becomes easy to do. In addition, when connecting a plurality of floor units, there is a difference between the connection position between the floor units and the connection position of the floor base material, so that errors in the height direction between adjacent floor units are alleviated. The

  In the floor structure of the building of the sixth invention, a plurality of receiving members are arranged along the longitudinal direction of the floor joists, and the receiving members adjacent in the direction orthogonal to the longitudinal direction are arranged in the longitudinal direction. It is characterized by being arranged at a predetermined interval from each other.

  According to the sixth invention, when a plurality of receiving members are provided in the direction orthogonal to the floor joists, the adjacent receiving members are arranged at a predetermined interval, so that the number of floor joists that the floor structure has is concerned. Therefore, the receiving member can be arranged in a balanced manner. Further, when a plurality of receiving members are spanned across the joist frame, the shape of the sound insulating member spanned between adjacent receiving members can be reduced in size, and attachment work of a heavy sound insulating member can be facilitated.

  In the building floor structure of the seventh invention, the sound insulation member is spanned by at least two receiving members among the plurality of receiving members arranged along the longitudinal direction of the floor joists. .

  According to the seventh aspect, the sound insulating member is stably held by the receiving member by being arranged over the plurality of receiving members.

The longitudinal cross-sectional view which shows the structure around the floor part of a building. The top view of the floor part of a floor structure. The perspective view which shows the structure of a floor structure. The top view which shows the installation structure of a floor structure. Assembly drawing of the floor structure. Assembly drawing of the floor structure. Assembly drawing of the floor structure. The cross-sectional enlarged view of a floor structure. Explanatory drawing of the example of a change of a floor structure.

[First Embodiment]
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In this embodiment, the steel house of the multi-story floor constructed | assembled as the building by the frame wall construction method is actualized. In addition, FIG. 1 is a longitudinal cross-sectional view which shows the structure around the floor part in a building.

  As shown in FIG. 1, the building 10 in this embodiment is a two-story building having a first floor part 11 as a lower floor part and a second floor part 12 as an upper floor part. The first floor portion 11 and the second floor portion 12 of the building 10 are respectively provided with outer wall panels 13 and 14 that form an outdoor surface, and inner wall materials 15 and 16 that form an indoor surface on the indoor side of the outer wall panels 13 and 14. Are installed.

  Each of the outer wall panels 13 and 14 includes outer wall plates 31 and 32 that form an outdoor surface, and frames 33 and 34 that are fixed to the back side (indoor surface side) of the outer wall plates 31 and 32. . The outer wall plates 31 and 32 are made of a material such as concrete or ceramic having excellent weather resistance, for example. The frames 33 and 34 are made of, for example, a highly rigid metal such as steel, and are formed by connecting long frame members having a substantially U-shaped cross section in a rectangular frame shape.

  The first floor portion 11 and the second floor portion 12 are partitioned by an inter-floor portion 17. The inter-floor portion 17 is composed of a second-floor floor surface, a first-floor ceiling surface (not shown), and members between them. An intermediate beam 24 is provided between the outer wall panel 13 on the lower floor and the outer wall panel 14 on the upper floor on the outer periphery of the interstory portion 17. For example, the intermediate beam 24 is made of a square material such as a laminated material and connected in a frame shape (rectangular shape). On the indoor side of the intermediate beam 24, as shown in FIG. 2 (schematic diagram of the upper surface of the inter-floor portion of the building), a plurality of floor units 20 constituting the floor portion of the second floor portion 12 are provided side by side. . The details will be described below with reference to FIGS. In addition, the floor unit 20 of the present embodiment is manufactured in advance in a factory, and is then transported to the construction site and installed in the building 10.

  FIG. 3 is a perspective view showing a cross-sectional configuration of the floor unit 20, and FIG. 4 is a plan view showing a state in which two floor units 20 are arranged side by side.

  The floor unit 20 includes a plurality of joist frames 26 arranged to extend in the same direction at a predetermined interval, and a frame unit 30 including an end joist 21 connected to an end of the joist frame 26 in the longitudinal direction, Compression deformation placed on the receiving member 40 so as to be interposed between a plurality of joist frames 26 and adjacent joist frames 26 so as to intersect (orthogonal) the longitudinal direction of the frames 26 A possible sound insulating member 45 and a rectangular plate-like floor base material 27 fixed on the frame part 30 and the receiving member 40 are provided, and these are integrated.

  The joist frame 26 is a lip-shaped C-shaped steel (lip groove-shaped steel), a web 26a whose plate surface extends in the vertical direction, and an upper flange 26b and a lower flange 26c that extend laterally from both upper and lower ends of the web 26a. And an upper lip 26d and a lower lip 26e extending from the front ends of the flanges 26b and 26c to face each other, and a lip groove 26f is formed between the upper lip 26d and the lower lip 26e.

  The joist frame 26 of the present embodiment is composed of two joist frames 26 on the side (the end in the short direction of the frame unit 30) and a pair of joist frames 26 located in the middle thereof. The pair of joist frames 26 form a floor joist 22 in a state where the webs 26a are connected back to back. In addition, when arranging each floor unit 20 side by side, it exists in the side part of the adjacent floor unit 20 (frame part 30), and the adjacent joist frames 26 are connected back to back by the webs 26a. Floor joists 22 straddling between adjacent floor units 20 are formed.

  The end joist 21 is a long member having a substantially U-shaped cross section made of a thin and light-weight steel, and a joist frame 26 is inserted into a U-shaped opening at a predetermined interval from a right angle and fixed. The joist frame 26 and the end joist 21 are integrated to form a frame portion 30.

  The receiving member 40 includes a joist frame 26 on a side portion (at least one of both side portions) of the frame portion 30, and is configured to be placed on at least two joist frames 26. The receiving member 40 has a mounting portion 41a placed on the joist frame 26 and a concave portion 42 for interposing the sound insulating member 45 between the adjacent joist frames 26, and is formed of a thin steel plate such as aluminum. The longitudinal direction of the elongated material thus formed is bent along the outer position of each joist frame 26 to form the placement portion 41 a and the concave portion 42.

  The placement portion 41 a of the receiving member 40 is sandwiched between the upper surface of the joist frame 26 and the bottom surface of the floor base material 27. Thereby, when screwing the receiving member 40 to the joist frame 26, the lateral displacement of the receiving member 40 with respect to the joist frame 26 is suppressed, and the mounting position of the receiving member 40 is maintained. When the placement portion 41 a is placed on the joist frame 26 located on the side of the frame portion 30, the placement portion 41 a is formed to have the same width as that in the direction perpendicular to the longitudinal direction of one joist frame 26. On the other hand, when placed on the pair of joist frames 26 (floor joists 22) located in the middle part of the frame part 30, the width of the pair of joist frames 26 is set equal to the width in the direction perpendicular to the longitudinal direction.

  The concave portion 42 is formed such that the longitudinal direction of the receiving member 40 is bent substantially vertically downward along the upper lip 26d of the floor joist 22 and is opposed to the joist facing at a predetermined depth dimension d1 from the bent position. It is formed by being further bent in the vertical direction toward the frame 26. Thereby, the joist frame 26 and the concave part 42 are alternately arranged side by side. For this reason, when the sound insulation member 45 is placed in the concave portion 42, the floor joists 22 and the sound insulation members 45 are alternately arranged side by side, so that a soundproof effect can be obtained without changing the floor surface height. it can.

  Further, by forming the concave portions 42 between the adjacent joist frames 26 without any gaps, the sound insulation member 45 is disposed without any gaps between the joist frames 26, and a soundproofing effect can be obtained more effectively.

  The depth dimension of the concave portion 42 is preferably smaller (shallow) than the thickness dimension of the sound insulating member 45 in the uncompressed state. As a result, the compression-deformable sound insulation member 45 is placed in the concave portion 42, and the floor base material 27 is placed on the sound insulation member 45, so that the compression-deformed sound insulation member 45 is filled in the concave portion 42 without a gap. Is done.

  The receiving member 40 is formed with a thickness and a width d3 (width in the longitudinal direction) having a strength capable of holding the sound insulating member 45. For example, the receiving member 40 is formed to have a thickness × width d3 = 1.2 mm × 200 mm. The thickness of the receiving member 40 is preferably formed as thin as possible so that the sound insulating member 45 can be held in consideration of suppressing the gap between the joist frame 26 and the floor base material 27.

  Further, as shown in FIG. 4, it is preferable that a plurality of receiving members 40 are arranged along the longitudinal direction of the joist frame 26 with a predetermined interval d <b> 4. For example, the receiving member 40 is disposed along the longitudinal direction of the joist frame 26 with a gap d4 = 600 mm. When a plurality of receiving members 40 are arranged on the joist frame 26, the length of the sound insulating member 45 spanned between the adjacent receiving members 40 (between the concave portions 42) can be shortened, and the load of attaching the heavy sound insulating member 45 is increased. It leads to reduction.

  In addition, when the plurality of floor units 20 are laid on the intermediate beam 24, the receiving members 40 are provided between the adjacent floor units 20 in order to prevent the receiving members 40 provided in the adjacent floor units 20 from interfering with each other. The attachment positions are preferably determined so as to be alternately arranged. For example, the mounting position of the receiving member 40 of the adjacent floor unit 20 is set to a position shifted in the longitudinal direction of the joist frame 26 by the width d3 (the length in the longitudinal direction of the receiving member 40). As a result, when the plurality of floor units 20 are arranged adjacent to the intermediate beam 24, the receiving members 40 are arranged alternately (staggered) in the longitudinal direction between the adjacent floor units 20. The interference between the receiving members 40 is preferably avoided.

  The sound insulating member 45 is a material having a specific gravity higher than that of the floor base material 27 and is formed in a rectangular plate shape in accordance with the shape of the concave portion 42. For example, the sound insulation member 45 is formed of a rubber-based sheet material so that light floor impact sound among floor impact sounds (heavy floor impact sound, light floor impact sound) applied to the second floor is easily attenuated. . In addition to this, the sound insulation member 45 is preferably formed of a material that is compressed and deformed by receiving a load from the floor base material 27, for example, a material such as a vinyl-based sheet material or a wood-based board. Also good.

  The heavy floor impact sound is a relatively low sound that occurs when a child jumps or runs around on the second floor and tends to spread over a wide range from the excitation point where the sound (vibration) is applied. The light floor impact sound is a relatively high sound generated when an article such as a spoon is dropped on the second floor, and the range extending from the excitation point is smaller than the heavy floor impact sound.

  As described above, when the sound insulating member 45 is formed of a material that can be compressed and deformed, the thickness d2 of the sound insulating member 45 is larger than the depth d1 of the concave portion 42, so that the sound insulating member 45 is formed into the concave portion. When placed on 42, the upper surface of the sound insulation member 45 is above the upper surface (top end) of the receiving member 40. For example, the upper surface of the sound insulating member 45 is 1 mm larger (higher) than the upper surface of the receiving member 40. Therefore, when the floor base material 27 is placed on the sound insulating member 45, the height direction of the sound insulating member 45 is compressed and comes into close contact with the bottom surface of the floor base material 27.

  The floor base material 27 is made of a rectangular plate material, and is formed of, for example, plywood or particle board. The floor base material 27 is set so that the width in the short direction and the length in the long direction are substantially the same as the width in the short direction and the length in the long direction of the frame portion 30, respectively. Further, in the present embodiment, the mounting position of the floor base material 27 with respect to the frame portion 30 is set so that the end in the short direction of the floor base material 27 is shifted by a width ΔD with respect to the side portion of the frame portion 30. It has been decided. By placing the floor base material 27 in a state shifted by a predetermined width ΔD with respect to the frame portion 30, the receiving member 40 (mounting portion 41 a) spanned on the joist frame 26 on the side of the frame portion 30. A part of the portion protrudes from the side of the floor base material 27. As a result, the position of the receiving member 40 can be confirmed from the floor base material 27 side. Thereby, it becomes easy to pinpoint the fixing location (position of receiving member 40) by screwing, and it leads to facilitation of fixing work.

  Further, when the floor base material 27 is disposed with a predetermined width ΔD shifted from the frame portion 30, when the plurality of floor units 20 are arranged adjacent to each other in the intermediate beam 24, the space between the adjacent floor units 20 is reduced. Thus, a difference in width ΔD occurs between the boundary position of the floor base material 27 and the boundary position of the floor joist 22 so that the vertical mounting error (step) between the adjacent floor units 20 can be suppressed. become.

  In addition, after the floor base material 27 is fixed on the frame portion 30, the floor finishing material 37 is laid so as to straddle each floor base material 27.

  Next, the assembly procedure of the floor unit 20 will be described with reference to FIGS. 5 to 7 show a configuration between the joist frame 26 on the side portion of the frame portion 30 and a pair of joist frames 26 in the middle portion of the frame portion 30 for ease of explanation.

  First, at the factory, both ends in the longitudinal direction of the joist frame 26 are fixed to the joists 21 to form the frame portion 30. At this time, the joist frames 26 on both sides of the frame unit 30 are fixed to the end joists 21 so that the webs 26a are outside. The joist frame 26 in the middle part of the frame part 30 is fixed to the end joists 21 by connecting the webs 26a of the pair of joist frames 26 back to back in advance.

  As shown in FIG. 5, the receiving member 40 is placed on the upper surface of the frame portion 30 in a state where the frame portion 30 is formed. At this time, the placement portion 41 a is placed on each joist frame 26, and the concave portion 42 is positioned between the adjacent joist frames 26. In this state, the mounting portion 41a of the receiving member 40 is fixed to the joist frame 26 with screws. As shown in FIG. 4, a plurality of receiving members 40 are arranged at predetermined intervals along the longitudinal direction of the joist frame 26, and each is fixed to the frame portion 30 by screwing.

  Next, as shown in FIG. 6, the sound insulating member 45 is placed in the concave portion 42. Here, the sound insulating member 45 is placed between two receiving members 40 adjacent to each other in the longitudinal direction of the joist frame 26 (see FIG. 4). At this time, a double-sided tape, an adhesive, or the like may be attached to the upper surface of the sound insulating member 45 so that the sound insulating member 45 is bonded to the lower surface of the floor base material 27.

  Thereafter, as shown in FIG. 7, the floor base material 27 is placed on the frame portion 30. At this time, as shown in the enlarged cross-sectional view of FIG. 8 (cross-sectional view taken along line AA of FIG. 6), the sound insulation member 45 has a thickness dimension d2 larger than the depth dimension d1 of the concave portion 42, thereby The member 45 is compressed by the load of the floor base material 27 and is superimposed on the bottom surface of the floor base material 27 (the sound-insulating member 45 that is elastically deformed is in close contact with the bottom surface of the floor base material 27).

  Further, the floor base material 27 is placed on the frame portion 30 so that the end portion in the short-side direction is at a position shifted by a width ΔD from the side portion of the frame portion 30. Thereby, the fixing position of the receiving member 40 can be easily confirmed from the surface side of the floor base material 27. The frame unit 30, the receiving member 40, the sound insulation member 45, and the floor base material 27 are integrated by screwing from the upper side of the floor base material 27 in accordance with the position of the receiving member 40, and the floor unit 20 is completed. Is done.

  Next, an outline of the assembly process of the floor unit 20 will be described.

  The assembled floor unit 20 and the floor finish 37 are loaded on a truck bed and transported to the building construction site. At the construction site, the floor units 20 are arranged side by side on the indoor side of the intermediate beam 24 so that the webs 26a of the joist frames 26 on the sides of the adjacent floor units 20 are back to back. The web 26 a of the joist frame 26 located on the intermediate beam 24 side of the joist frame 26 on the side of the floor unit 20 is fixed to the intermediate beam 24. Moreover, in the adjacent floor unit 20, the boundary part of the edge parts of the longitudinal direction (end joists 21) may be mounted on the upper end surface of the partition wall of a lower floor, and may be fixed. When the floor unit 20 is laid on the inner side of the intermediate beam 24, a floor finishing material 37 is laid on the floor base material 27.

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

  Since the sound insulating members 45 and the floor joists 22 are alternately arranged side by side below the floor base material, the sound insulating members 45 can be provided without being restricted in the height direction of the floor portion. Moreover, about the structure by which the sound-insulation member 45 is attached to the lower surface of a floor surface material, the design regarding a floor part can be facilitated.

  Moreover, the installation of the heavy sound insulation member 45 is completed simply by placing it on the receiving member 40, and the workability of the floor structure is improved.

  As described above, a floor structure with high sound insulation performance can be suitably constructed.

  The receiving member 40 is formed by forming the thickness d2 of the sound insulating member 45 formed of a compressible and deformable material and mounted on the concave portion 42 of the receiving member 40 larger than the depth dimension d1 of the concave portion 42. When the floor base material 27 is fixed on top, the sound insulation member 45 is compressed by the load from the floor base material 27. Therefore, when the sound insulation member is superimposed on the bottom surface of the floor base material 27, the sound insulation member is in close contact with the floor base material. Thereby, the absorption effect of the floor impact sound added to a floor structure can be acquired suitably.

  The placement portion 41a, which is a part of the receiving member 40, is sandwiched between the floor joist 22 and the floor base material 27, thereby suppressing the occurrence of lateral displacement of the receiving member 40 placed on the floor joist, Fixing work between the members by screwing or the like can be facilitated.

  The receiving member 40 is bridged and placed on two joist frames 26 including the joist frame 26 located at least on the side in the frame arrangement direction among the plural joist frames 26. When the adjacent floor units 20 are connected, the positions of the receiving members 40 of the floor units 20 are alternately shifted in the longitudinal direction. Thus, when the adjacent floor units 20 are connected to each other, Interference between the receiving members 40 of the unit 20 can be avoided.

  In the floor unit 20, since a part of the receiving member 40 protrudes to the side of the floor base material 27, it is easy to confirm the position of the receiving member 40 placed on the frame portion 30 from the upper side of the floor base material 27. Become. In addition, when connecting a plurality of floor units 20, there is a difference between the connection position between the floor units 20 and the connection position of the floor base material 27, so that the height direction between the adjacent floor units 20 is different. The error is alleviated.

  When a plurality of receiving members 40 are provided in the direction orthogonal to the floor joists 22, by arranging adjacent receiving members 40 with a predetermined interval, the receiving members can be used regardless of the number of floor joists 22 the floor unit 20 has. 40 can be arranged in a well-balanced manner. Further, when a plurality of receiving members 40 are spanned across the joist frame 26, the shape of the sound insulating member 45 spanned between the adjacent receiving members 40 can be reduced in size, and attachment work of the heavy sound insulating member 45 can be facilitated. .

The sound insulating member 45 is stably held by the receiving member 40 by being arranged over the plurality of receiving members 40.
Other Embodiment
The present invention is not limited to the description of the above embodiment, and may be implemented as follows, for example.

  As shown in the modification example of the floor structure in FIG. 9, the placement portion 41 a of the floor foundation material 27 is placed in a state where the end portion of the floor foundation material 27 coincides with the side portion of the frame portion 30. Try to protrude to the side. And the front end side of the mounting part 41a which protruded to the side is bent upward (floor base material 27 side). Thereby, a part of the mounting portion 41 a extending from the side of the floor base material 27 serves as a mark when the floor base material 27 is fixed to the floor unit 20. In addition, since the front end side of the folded mounting portion 41 a is positioned on the side of the floor base material 27, the floor base material 27 is placed beside the frame portion 30 when the floor base material 27 is fixed to the frame portion 30. The positional deviation in the direction (direction orthogonal to the longitudinal direction) can be suppressed. Therefore, it is possible to easily and accurately perform the work of fixing the floor base material 27 to the frame portion 30.

  -When arrange | positioning the receiving member 40 alternately (staggeredly) along the longitudinal direction of the floor unit 20, you may arrange | position without leaving the space | interval of the receiving members 40 adjacent to a longitudinal direction. In this case, the sound insulation member 45 is easily held stably.

  A protrusion for preventing the displacement of the sound insulating member 45 may be formed on the receiving surface of the receiving member 40 (the receiving surface of the concave portion 42). The sound insulation member 45 placed on the concave portion 42 can be stably held by the protrusion.

  -The receiving member 40 should just be formed so that it may span over at least two adjacent floor joists 22, and should just have at least 1 concave part 42. FIG.

  In the above, an example in which the sound insulating member 45 is placed in all the concave portions 42 without a gap is shown, but the presence or absence of the sound insulating member 45 may be determined according to the use of each room.

  When the number of joist frames 26 that the floor unit 20 has is greater than the number of joist frames 26 spanned by the receiving members 40, the receiving members 40 are continuously spanned across the joist frames 26 arranged side by side. You may be made to do. For example, the receiving members 40 are alternately arranged in a staggered manner. In addition to this, the receiving member 40 may have a shape that spans all joist frames 26 of the floor unit 20.

  -As the floor unit 20, you may make it include the ceiling material arrange | positioned ranging over the lower surface of each floor joist 22. For example, the ceiling material is disposed in a state where it is suspended by a support that abbreviates the figure number fixed to the floor joist 22.

  -In the above, the example which formed the receiving member 40 by the bending process of a steel plate was shown. Besides this, the receiving member 40 can be formed by resin molding or metal molding.

  In the above description, the floor unit 20 used for a steel house is assumed, but other than this, the present invention can be applied to a building having a hierarchical structure such as a building with a frame construction method or a building with a unit construction method.

  The sound insulation member may be formed of an incompressible material that can absorb light floor impact sound. For example, you may form with the material which mixed iron powder with asphalt, metal sheets, such as aluminum, a gypsum board, an asphalt type sheet material, etc. In this case, the thickness dimension d2 of the sound insulation member 45 is formed to be the same as the depth dimension d1 of the concave portion 42 or smaller than the depth dimension d1 (d2 ≦ d1). Thereby, the floor base material 27 is fixed to the frame part 30 without a gap.

  The sound insulation member 45 may be held via three or more concave portions 42. By being held by the plurality of receiving members 40, the mounting state of the sound insulating member 45 is more stably maintained.

  -You may determine the attachment position of the receiving member 40 on a 1st flame | frame using the positioning jig which abbreviate | omits illustration. For example, the positioning jig is formed in a rectangular shape in accordance with the interval between the receiving members 40 adjacent in the longitudinal direction of the joist frame 26. For example, after determining the attachment position of the receiving member 40 on the joist frame 26, by aligning one end of the positioning jig to that position, the other end can be adjusted to the position where the next receiving member 40 is placed. The receiving member 40 can be easily positioned. Similarly, when screwing from the upper side of the floor base material 27, the position of the receiving member 40 is confirmed from one surface side of the floor base material 27, and screwing at that position is completed. After that, by aligning one end of the positioning jig with the screwing location, the other end can be easily aligned with the next screwing location.

  On the joist frame 26, it is also conceivable that a gap is generated by the thickness of the material of the receiving member 40 at a portion where the receiving member 40 is not placed. Therefore, a plate-like spacer for filling the gap may be provided on the joist frame 26. That is, the receiving members 40 and the spacers may be alternately arranged on the joist frame 26.

  FIG. 4 shows an example in which a gap in which the sound insulating member 45 is not placed is provided when there is a gap between the end joist 21 and the receiving member 40 in the floor surface direction. In addition to this, when there is an interval between the end joist 21 and the receiving member 40 in the floor surface direction, the sound insulating member 45 is arranged at the position of the interval between the end joist 21 and the receiving member 40. May be. In this case, the sound insulating member 45 is fixed to the floor base material 27 with screws at a position between the end joist 21 and the receiving member 40 so that the sound insulating member 45 is held on the bottom surface side of the floor base material 27. It may be.

  DESCRIPTION OF SYMBOLS 10 ... Building, 20 ... Floor unit, 22 ... Floor joist, 26 ... joist frame, 27 ... floor base material, 30 ... frame part, 40 ... receiving member, 41a ... mounting part, 42 ... concave part, 45 ... sound insulation member , D1 ... depth dimension, d2 ... thickness dimension.

Claims (7)

A plurality of floor joists arranged at intervals and arranged to extend in the same direction;
A receiving member that crosses the longitudinal direction of the floor joists, and
A plate-like floor base material fixed on the floor joists and the receiving member;
Between the plurality of floor joists, in a state of being placed on the receiving member, a sound insulating member having an upper surface superimposed on a bottom surface of the floor base material,
The floor structure of the building characterized by comprising. The receiving member is a direction orthogonal to the longitudinal direction of the floor joists, and has a concave portion for interposing the sound insulating member between the adjacent floor joists,
The said sound insulation member is formed with the material which receives the load from the said floor base material, and is compressed and deformed, The thickness dimension is formed larger than the depth dimension of the said recessed part. Building floor structure.   The receiving member has a placement portion placed on the upper surface of the floor joist, and the placement portion described above is in a state where the floor base material is fixed to the floor joist and the upper surface of the floor joist. The building floor structure according to claim 1, wherein the building floor structure is sandwiched between the bottom surface of the floor base material. It comprises a frame portion having a plurality of joist frames constituting the floor joists, using a plurality of floor units in which the floor base material is fixed on the frame portions, the plurality of floor units are arranged side by side, The floor structure of the building in which the joist frames of each floor unit are connected,
In the floor unit, the receiving member is placed between two joist frames including at least a joist frame located on the side of the frame arrangement direction among the joist frames,
The floor structure of the building according to any one of claims 1 to 3, wherein each receiving member is placed at a position shifted in a longitudinal direction of the floor joists in the adjacent floor units.   In the floor unit, the receiving member is placed on the joist frame located on the side in the frame arrangement direction of the plurality of joist frames, and a part of the receiving member protrudes to the side of the floor base material. The floor structure of the building according to claim 4.   A plurality of the receiving members are arranged along the longitudinal direction of the floor joists, and the receiving members adjacent to each other in a direction orthogonal to the longitudinal direction are arranged at predetermined intervals in the longitudinal direction. The building floor structure according to any one of claims 1 to 5.   The floor structure of a building according to claim 6, wherein the sound insulating member is stretched over at least two receiving members among a plurality of receiving members arranged along the longitudinal direction of the floor joists.

Images