JP4712602B2 - Triple floor structure - Google Patents

Description

  The present invention relates to a sound insulation floor structure of a triple floor, and more specifically, a sound insulation floor by a dry flooring method in which a triple floor is constructed by forming a space between an existing foundation floor surface in various buildings such as apartment buildings. Concerning structure.

Conventionally, for example, a double floor 40 shown in FIG. 6 is known as a floor structure having high sound insulation performance in various buildings such as apartment houses (see Patent Document 1).
The double floor 40 shown in FIG. 6 has a double floor support leg 44 comprising a vibration isolating rubber 42 in contact with the floor base 41 and a leg 43 standing on the vibration isolating rubber 42 on the floor base 41. A floor board material 45 is placed therethrough. The anti-vibration rubber 42 has a structure in which a deformation suppressing member 46 is disposed around the anti-vibration rubber 42 in contact with the anti-vibration rubber 42.

According to such a double floor 40, the impact vibration is transmitted to the anti-vibration rubber 42 through the leg portion 43 when the shock is applied to the floor board material 45. The anti-vibration rubber 42 is once compressed and deformed by the transmitted impact vibration, and then rebounds to return to its original shape by elasticity. In this case, according to the double floor 40, it is possible to suppress the subduction of the floor while suppressing the vibration and the propagation of sound by the deformation suppressing member 46 disposed around the vibration isolating rubber 42. .
JP 2003-268932 A

However, this type of double bed 40 has the following problems.
That is, in various buildings such as apartment houses, a double floor is generally adopted as a sound insulation measure. On the other hand, unit bathrooms, kitchens, etc. installed in buildings are not installed on the double floor due to their heavy weight, and are installed directly on the foundation surface of the building. The bottom is raised and standardized so as to be barrier free.

  Here, in recent apartments, after the purchase of each dwelling unit by the dwelling unit purchaser, it is often planned that the plan such as the floor plan in each dwelling unit can be changed according to the desire of the dwelling unit purchaser. . In such a case, the floor plan differs between the upper and lower floor dwelling units, and a bedroom or the like may be arranged in the lower floor dwelling unit directly below the unit bath or the like installed in the upper floor dwelling unit.

Therefore, when the double floor 40 is adopted in an apartment house, a unit bath or the like is directly installed on the foundation surface of the building, so that an impact sound in the unit bath or the like is transmitted to the lower floor or adjacent dwelling unit, resulting in a noise problem. There is a problem that it ends up.
In addition, when a double floor 40 is used in an apartment house and unit baths are installed directly on the foundation surface of the building, it is not possible to respond quickly to changes in the floor plan after the purchase of each dwelling unit by the purchaser of the dwelling unit. When performing, there is a problem that it becomes difficult to change the floor plan.

  The present invention has been made in order to solve the above-described problems of the prior art, and its purpose is to provide equipment such as a unit bath, a kitchen, etc., which can transmit an impact sound to a lower floor or an adjacent dwelling unit on a double floor. It is to provide a triple floor that can prevent the impact sound in a unit bath or the like from being transmitted to a lower floor or an adjacent dwelling unit and can quickly and easily respond to a change in the floor plan. .

The triple floor structure according to claim 1 of the present invention supports a lower floor material at a predetermined height from a base surface by a plurality of lower support legs, and is made of an elastic material at each lower end portion of the plurality of lower support legs. A lower floor structure provided with a lower cushioning material, and an upper floor material is supported at a predetermined height from the upper surface of the lower floor material by a plurality of upper support legs, and an elastic material is applied to each lower end portion of the plurality of upper support legs. An upper floor structure provided with an upper buffer material, and the elastic material forming the upper buffer material is an elastic material having a higher rubber hardness than the elastic material forming the lower buffer material , and the position of the lower support legs the are arranged in the lower floor member and a position of the upper support legs arranged on said base surface, characterized in that is offset when viewed from the vertical direction .

In addition, the triple floor structure according to claim 2 of the present invention is the triple floor structure according to claim 1, wherein the vertical dimension of the upper cushioning material is smaller than the vertical dimension of the lower cushioning material. It is characterized by being .

According to the triple floor structure according to claims 1 and 2 of the present application , in a building, a unit bath, a kitchen, etc., such as a facility that can transmit an impact sound to a lower floor or an adjacent dwelling unit is installed on the lower floor structure. It is possible to prevent impulsive sound from being transmitted to the lower floors of equipment such as unit baths, and to standardize unit floors by raising the floor and bottom by adjusting the height of the upper floor material. It becomes possible to easily achieve barrier-free with such facilities. Further, by installing the lower floor structure uniformly in the building and installing each structure on the lower floor structure, it becomes possible to respond quickly and easily to changes in the floor plan in renovation and the like.

Hereinafter, a triple floor structure according to a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic partial cross-sectional side view of a triple floor structure according to an embodiment of the present invention. FIG. 2 is a schematic longitudinal sectional view of the cushioning material, support legs and floor material provided in the triple floor structure. FIG. 3 is a schematic partial plan view showing an example of the arrangement of the lower support legs and the upper support legs.
As shown in FIG. 1, the triple-floor structure 1 is installed in various buildings such as apartment buildings, and is installed on a lower floor structure 3 that is installed on a foundation surface 2 such as a concrete slab, and on the lower floor structure 3. And an upper floor structure 4.

As shown in FIG. 2, the lower floor structure 3 is supported by a lower cushioning material 5 installed on the foundation surface 2, a lower support leg 6 standing on the lower cushioning material 5, and the lower support leg 6. The lower floor material 7 is provided.
The lower cushioning material 5 is made of an elastic material such as a substantially cylindrical rubber, and a central hole portion 11 is formed in a substantially upper half of the central portion viewed from the vertical direction of the lower cushioning material 5. An annular groove-like recess 12 is formed on the inner peripheral surface of the side portion of the central hole portion 11, and a cross shape is formed on the inner peripheral surface of the central hole portion 11 from the bottom surface 13 to the side surface of the central hole portion 11. The groove portion 14 is formed. In addition, four substantially hemispherical protrusions 15 are symmetrically formed on the lower surface of the lower cushioning material 5. By forming the protrusions 15, the ground contact area with the base surface 2 is reduced, the load received via the lower support legs 6 is dispersed, and the floor impact sound, In particular, an effect of reducing heavy floor impact sound can be obtained. Here, the height of each projection 15 is preferably about 2 to 4 mm, and all the projections 15 are preferably the same height. The lower cushioning material 5 is fixed and installed on the base surface 2 by bonding or the like at predetermined intervals.

The lower support leg 6 includes a hollow support bolt 20 that is rotatably provided on the lower shock absorber 5, a level adjustment nut 21 into which the upper end of the hollow support bolt 20 is inserted, and an upper end of the level adjustment nut 21. And a support plate 22 supported by the portion.
The hollow support bolt 20 is formed from a relatively short hollow pipe having a central through hole. The hollow support bolt 20 is buckled and formed with an annular protrusion 25 bulging laterally at the lower end, and a screw portion 23 is formed on the outer peripheral surface of the upper end by a predetermined length from the upper end. Further, a groove-like engaging portion 24 that forms a locking portion for engaging the tip of a rotary tool such as a screwdriver or an electric screwdriver is formed on the tip surface of the hollow support bolt 20. The lower end of the hollow support bolt 20 is inserted into the central hole 11 of the lower cushioning material 5, and the protrusion 25 is engaged with the recess 12 of the lower cushioning material 5. It is erected in a state where it is rotatably supported on the bottom surface 13 of the central hole portion 11.

  The level adjusting nut 21 is formed of a relatively short hollow pipe having a central through hole into which the hollow support bolt 20 can be inserted. A thread groove 26 that fits the thread 23 of the hollow support bolt 20 is formed on the inner peripheral surface of the lower end of the level adjusting nut 21 by a predetermined length from the lower end. Further, an annular support portion 27 projects from the substantially central portion in the vertical direction of the outer peripheral surface of the level adjusting nut 21. The level adjusting nut 21 is installed by fitting the upper end portion of the screw portion 23 of the hollow support bolt 20 into the screw groove portion 26.

  The support plate 22 is formed by forming a particle board, a laminated plywood, a wood fiber board or the like into a substantially rectangular flat plate shape. Further, the support plate 22 is provided with an insertion hole 28 into which the upper portion of the level adjusting nut 21 is fitted at a substantially central portion, and the upper end portion of the insertion hole 28 is chamfered and widened upward. A portion 29 is formed. The support plate 22 is fitted with the upper end portion of the level adjusting nut 21 in the insertion hole 28, expands the upper end portion of the level adjusting nut 21, and partially extends into the chamfered portion 29 of the insertion hole 28. While being installed by being buried, an adhesive reservoir 30 is formed on the upper part of the level adjusting nut 21.

  The lower floor material 7 is formed of a particle board, a hard board, a high-density fiber board, a plywood, a vibration damping sheet, or the like, and is supported on the upper surface of the support plate 22 by being fixed with an adhesive, a nail, or the like. The lower floor material 7 may be laid with two or more layers of particle board, hard board, high-density fiber board, plywood or vibration damping sheet as necessary, or a combination thereof. In FIG. The base plate 31 and the finishing material 32 are provided and formed in three layers.

And the lower floor structure 3 comprised as mentioned above is leveling by inserting the front-end | tip of rotating tools, such as a driver, in the engaging part 24 formed in the top end surface of the hollow support bolt 20, and rotating it. The adjustment nut 21 and the support plate 22 move up and down, and the floor surface level of the lower floor material 7 supported by the support plate 22 can be adjusted.
Similar to the lower floor structure 3, the upper floor structure 4 includes an upper cushioning material 34 installed on the lower floor material 7 of the lower floor structure 3, an upper support leg 35 standing on the upper cushioning material 34, and an upper stage And an upper floor material 36 supported by the support legs 35.

  The basic configuration of the upper cushioning material 34 is the same as that of the lower cushioning material 5. However, the upper cushioning material 34 is made of a material having a large spring constant with respect to the lower cushioning material 5 and has a small vertical dimension. Here, in this embodiment, the upper cushioning material 34 has a rubber hardness of Hs = 83 ° and a vertical dimension of 9.4 mm, whereas the lower cushioning material 5 has a rubber hardness of Hs. = 65 [deg.] And the vertical dimension is 33.3 mm.

The basic structure of the upper support leg 35 is the same as that of the lower support leg 6. However, the upper support legs 35 are formed so that the vertical dimensions of the hollow support bolts 20 and the level adjusting nuts 21 are larger than those of the lower support legs 6.
In the upper floor material 36, a floor base is formed by a base plate 31 such as a particle board, a hard board, a high density fiber board, a plywood or a vibration damping sheet, and a finishing material 32 such as a flooring material is installed on the base plate 31. Is done. The base plate 31 of the upper floor material 36 may be a particle board, a hard board, a high density fiber board, a plywood or a damping sheet, if necessary, laid in two or more layers, or a combination thereof. In FIG. 2, the base plate 31 and the finishing material 32 are provided and formed in two layers.

  In the upper floor structure 4 configured as described above, the tip of a rotary tool such as a screwdriver is fitted into the engaging portion 24 formed on the top end surface of the hollow support bolt 20, as in the lower floor structure 3. And the level adjustment nut 21 and the support plate 22 move up and down, and the floor level of the upper floor material 36 supported by the support plate 22 can be adjusted on the lower floor structure 3. Become.

Next, an example of the installation form of the triple floor structure 1 will be described.
In the installation of the triple floor structure 1, first, the lower floor structure 3 is uniformly installed on the foundation surface 2 in the space surrounded by the structural wall (or dry type boundary wall) 37 of the building.
For this, first, a plurality of lower cushioning materials 5 and lower support legs 6 are installed on the base surface 2 at a predetermined pitch corresponding to the shape of the base plate 31 of the lower floor material 7, and on each lower support leg 6. It is installed in a state where the edge of the base plate 31 of the lower floor material 7 is supported. In this case, the lower buffer material 5 and the lower support legs 6 may be attached to the lower surface of the base plate 31 first, and the base plate 31 may be installed on the base surface 2. The lower support leg 6 and the base plate 31 are fixed via an adhesive sheet or the like attached to the upper surface of the support plate 22 of the lower support leg 6.

Then, the adhesive reservoir 30 of the support plate 22 of the lower support leg 6 is exposed from the edge of the base plate 31 and the level of the base plate 31 is adjusted by turning the hollow support bolt 20 from above with a screwdriver or the like.
Further, similarly, the base plate 31 of the adjacent lower floor material 7 is placed on the already installed lower support leg 6 with a predetermined gap that allows the level adjustment of the base plate 31 to be fixed on the lower support leg 6. To go.

  Such an operation is repeated with the base plate 31 of the lower floor material 7, and the base plate 31 is uniformly applied in the space surrounded by the structural wall 37, and the floor surface level is adjusted. Adhesive is poured into the adhesive reservoir 30 of the lower support leg 6 exposed in the gap. Here, since the central through hole of the hollow support bolt 20 of the lower support leg 6 and the central hole portion 11 of the lower shock absorber 5 communicate with each other, after laying the base plate 31 and adjusting the floor level, When an adhesive is injected from the adhesive reservoir 30 formed on the upper part of the level adjusting nut 21, the adhesive penetrates into the screwed portion between the level adjusting nut 21 and the hollow support bolt 20, and the base plate 31. In addition to diffusing and penetrating into the gap between the support plate 22 and adhering and fixing between them, the lower end of the hollow support bolt 20 and the lower cushioning material 5 are also adhered and fixed.

Then, after the base plate 31 of the lower floor material 7 is uniformly applied in the space surrounded by the structural wall 37 and the floor surface level is adjusted, the finishing material 32 is laminated uniformly on the upper surface of the base plate 31. Is mounted and fixed with nails or the like, the lower floor structure 3 is installed.
Here, the arrangement form of the base plate 31 of the lower floor material 7 can be appropriately changed such as a staggered arrangement, a parallel arrangement, and the like.

In this way, first, by uniformly installing the lower floor structure 3 on the base surface 2 of the space surrounded by the structural wall 37, the sound insulation performance in the space surrounded by the structural wall 37 by the lower floor structure 3 is improved. It will be possible to ensure uniform coverage.
Next, the partition wall 38 and the upper floor structure 4 are appropriately installed on the lower floor structure 3 that is uniformly installed on the base surface 2 of the space surrounded by the structure wall 37.
The upper floor structure 4 is installed in each space surrounded by the partition wall 38 after the partition wall 38 is appropriately installed on the lower floor structure 3 according to the floor plan or the like. In addition, the partition wall 38 may be installed also on the upper floor structure 4.

  The upper floor structure 4 is installed in the same manner as the lower floor structure 3. The upper floor structure 4 is placed on the lower floor material 7 of the lower floor structure 3 at a predetermined pitch corresponding to the shape of the base plate 31 of the upper floor material 36. A plurality of cushioning members 34 and upper support legs 35 are installed, and the upper support legs 35 are installed with the edge of the base plate 31 of the upper floor material 36 being cantilevered. Here, the positions of the upper cushioning material 34 and the upper support leg 35 arranged on the lower flooring material 7 are the positions of the upper cushioning material 34 and the upper support leg 35 on the lower flooring material 7, as shown in FIG. The positions of the lower cushioning material 5 and the lower support legs 6 on the base surface 2 are arranged at positions shifted from the vertical direction. Then, after the base plate 31 of the upper floor material 36 is constructed, the upper floor structure 4 is installed by placing a finishing material 32 such as a laminated plate material or flooring on the upper surface of the base plate 31 and fixing with a nail or the like. Is done. With this configuration, the sound insulation performance of the triple floor structure 1 can be further enhanced.

When installing a unit bath, kitchen, etc. (not shown) in the building, a unit bath is installed on the lower floor structure 3 and an upper floor structure 4 is installed. The vertical position of the upper floor material 36 is adjusted to the height of the entrance of the unit bath.
Thus, according to the triple-floor structure 1, in the building, the unit bath, the kitchen, etc. are installed on the lower floor structure 3 with the equipment that may transmit the impact sound to the lower floor or the adjacent dwelling unit. It is possible to prevent the impact sound in facilities such as buses from being transmitted to the lower floor. In addition, by installing each structure on the lower floor structure 3 that is uniformly installed, it is possible to quickly and easily respond to changes in the floor plan in renovation and the like. Furthermore, even if equipment such as a unit bath that has been raised and standardized is installed on the lower floor structure 3, the height of the upper floor structure 4 is adjusted so that the barrier between the floor and the equipment such as the unit bath is maintained. Free can be easily achieved.

  Here, in the triple floor structure 1, the lower cushioning material 5 of the lower floor structure 3 is formed of a material having a small spring constant capable of ensuring the sound insulation performance of the floor, and has a large vertical dimension. Therefore, it is possible to ensure the sound insulation performance of the floor uniformly in the space surrounded by the structural wall 37 in which the lower floor structure 3 is installed. On the other hand, if the lower cushioning material 5 is made of a material having a small spring constant capable of ensuring the sound insulation performance of the floor, the floor surface of the lower floor structure 3 becomes soft, and the comfort of walking deteriorates, for example, the feeling of walking becomes worse. It is possible that However, as a result of research, when a person walks on the triple floor structure 1 as a result of the study, the load on the floor surface during walking acts mainly on the upper cushioning material 34 because the load time is short. It was learned that the hardness of structure 4 was felt. Therefore, in the triple floor structure 1, the upper floor structure 4 is installed on the lower floor structure 3, the upper cushioning material 34 is formed of a material having a large spring constant with respect to the lower cushioning material 5, and the vertical dimension is set. It is possible to achieve a floor structure that can provide a good feeling of living while ensuring sound insulation performance as a floor.

Although the embodiments of the present invention have been described above, various modifications can be made in the embodiments of the present invention.
For example, in the above embodiment, the hollow support bolt 20 is provided in the lower support leg 6 and the upper support leg 35, but a solid support bolt (not shown) may be provided instead of the hollow support bolt 20. Absent.
In this case, the basic structure of the solid support bolt is the same as that of the hollow support bolt 20, but the hollow support bolt 20 is formed of a hollow pipe having a central through hole, whereas the solid support bolt is the center. It is formed in a columnar shape without having a through hole.

  And even when installing the lower floor structure 3 and the upper floor structure 4 by the lower stage support leg 6 and the upper stage support leg 35 provided with such a solid support bolt, the base plate 31 is constructed uniformly, and the floor level is set. After the adjustment, the adhesive is injected into the adhesive reservoir 30 of the lower support leg 6 or the upper support leg 35 exposed in the gap between the adjacent base plates 31. In such a case, since the solid support bolt does not have a central through hole, the adhesive injected from the adhesive reservoir 30 formed on the upper portion of the level adjusting nut 21 is not mixed with the level adjusting nut 21. Only the screwed portion between the support bolt and the gap between the base plate 31 and the support plate 22 are bonded and fixed.

Next, a test example of the floor impact sound level for the triple floor structure 1 will be shown to specifically explain the effect of the present invention.
In the following test examples, the measurement method and evaluation of the floor impact sound level were performed in accordance with the provisions of JIS A1418-1, 2 (method for measuring the floor impact sound level at the building site). The height of the sound receiving chamber microphone was 1200 mm.
Test items:
(1) Lightweight floor impact sound insulation performance (impact source: tapping machine)
(2) Heavy floor impact sound insulation performance (Shock source: Bang machine)

Measuring method:
Two types of floor impact sound generators are used: a lightweight floor impact sound generator (tapping machine) and a heavy floor impact sound generator (bang machine). The sound was received by a microphone installed in the room, received by the sound level meter of the sound receiving device, and the sound pressure level was recorded for each frequency band of 1/1 octave band by an octave band analyzer. . The frequency band is 125Hz, 250Hz, 500Hz, 1,000Hz (1kHz), 2,000Hz (2kHz) in the lightweight floor impact sound insulation performance test, and 31.5Hz, 63Hz, 125Hz in the heavy floor impact sound insulation performance test. 250 Hz and 500 Hz, and the higher the number, the higher the sound.

Specimen:
FIG. 4 is a schematic partial cross-sectional side view of the specimen A. FIG. 5 is a schematic partial cross-sectional side view of the specimen B.
The test body A has a double floor structure according to the comparative example, and is composed of only the lower floor structure 3.
Bankyo floor YPMCB type (support leg spacing 300 mm x 300 mm), floor height 88 mm (floor board configuration: particle board 25 mm + flooring board 7 mm + plywood 12 mm).
The test body B has a triple floor structure according to the present invention, and includes a lower floor structure 3 and an upper floor structure 4.

Lower floor structure 3: Bankyo floor YPMCB type (support leg interval 300 mm × 300 mm), floor height 88 mm (floor board configuration: particle board 25 mm + floor board 7 mm + plywood 12 mm).
Upper floor structure 4: Bankyo floor WP type (support leg interval 455 mm × 600 mm), floor height 200 mm (floor plate configuration: particle board 20 mm + flooring 12 mm).
Table 1 shows the measurement results of the lightweight floor impact sound insulation performance test. Table 2 shows the measurement results of the heavy floor impact sound insulation performance test.

  As is clear from the results shown in Tables 1 and 2, the triple floor 1 according to the present invention composed of the lower floor structure 3 and the upper floor structure 4 is compared with the double floor according to the comparative example composed of only the lower floor structure 3. And floor impact sound insulation performance is excellent.

1 is a schematic partial cross-sectional side view of a triple floor structure according to an embodiment of the present invention. It is a schematic longitudinal cross-sectional view of the buffer material, support leg, and floor material with which a triple floor structure is equipped. It is a general | schematic fragmentary top view which shows an example of the arrangement | positioning form of a lower stage support leg and an upper stage support leg. 2 is a schematic partial cross-sectional side view of a test body A. FIG. 3 is a schematic partial cross-sectional side view of a test body B. FIG. 1 is a schematic partial cross-sectional side view of a double floor structure according to Patent Document 1. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Triple floor structure 2 Base surface 3 Lower floor structure 4 Upper floor structure 5 Lower buffer material 6 Lower support leg 7 Lower floor material 11 Central hole part 12 Recess 13 Bottom face 14 Groove part 15 Projection 20 Hollow support bolt 21 Level adjustment nut 22 Support Plate 23 Screw part 24 Engagement part 25 Projection part 26 Screw groove part 27 Support part 28 Insertion hole 29 Chamfer part 30 Adhesive reservoir 31 Base plate 32 Finishing material 34 Upper buffer material 35 Upper support leg 36 Upper floor material 37 Structural wall 38 Partition Wall 40 Double floor 41 Floor base 42 Anti-vibration rubber 43 Leg 44 Double floor support leg 45 Floor board material 46 Deformation suppression material

Claims (2)

A lower floor structure in which a lower floor material is supported at a predetermined height by a plurality of lower support legs from a base surface, and a lower cushion material made of an elastic material is provided at each lower end of the plurality of lower support legs;
An upper floor structure in which an upper floor material is supported at a predetermined height by a plurality of upper support legs from the upper surface of the lower floor material, and an upper cushioning material made of an elastic material is provided at each lower end of the plurality of upper support legs; A triple floor structure comprising:
The elastic material forming the upper cushioning material is an elastic material having a high rubber hardness compared to the elastic material forming the lower cushioning material ,
The triple floor structure, wherein the position of the upper support leg disposed on the base surface and the position of the lower support leg disposed on the lower floor material are shifted from each other when viewed from the vertical direction. .   The triple floor structure according to claim 1, wherein a vertical dimension of the upper cushioning material is smaller than a vertical dimension of the lower cushioning material.

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