JP2007138652A - Floor structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floor structure which can be easily constructed at a low cost, and which can realize excellent vibration isolation performance and sound insulation performance. <P>SOLUTION: The floor structure 1 laminated on the top surface of a floor slab 2 is provided with a shock-absorption vibration isolation layer 10, a double-floor layer 20, and a floor-finishing layer 30. The shock-absorption vibration isolation layer 10 is constituted by laying a shock-absorption vibration isolation member 11 on the entire top surface of the floor slab 2. Then the double-floor layer 20 consists of a plate 22 and a plurality of strut members 23, 23. The plate 22 is placed on the top surface of the shock-absorption vibration isolation layer 10, and the strut members 23, 23 are arranged on the top surface of the plate 22 at predetermined intervals. Then the floor-finishing layer 30 is placed on the top surface of the double-floor layer 20. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a floor structure such as a building that reduces floor impact noise.

  The floor impact sound is one of the most common causes of troubles associated with life in apartment houses such as apartments. The floor impact sound is caused by human walking, jumping, furniture dragging, tableware dropping, etc., and vibrations of a wide frequency component due to impact are generated depending on the softness and impact time of the impacting vibration. This is the sound that propagates and is observed in the lower floor room.

  Conventionally, for the purpose of reducing such floor impact noise, a floating floor structure may be employed in an apartment house, a hotel, an acoustic related facility, a complex facility, and the like.

As such a floating floor structure, for example, as shown in FIG. 4A, a buffer material 120 such as glass wool or rock wool is laid on the upper surface of the floor slab 110, and a floor material 130 is formed on the upper surface of the buffer material 120. There is a construction method of arranging (see Patent Document 1, for example).
As another floating floor structure, as shown in FIG. 4 (b), a plurality of bundles 220 made of vibration-insulating rubber 221 are placed between the floor slab 210 and the flooring 230 through a predetermined interval. In some cases, a floating floor structure 200 that also serves as a double floor structure is formed (see, for example, Patent Document 2).
JP 63-223261 (2nd page-3rd page, FIG. 1) JP 2000-73539 A ([0008]-[0015], FIGS. 1 to 3)

  However, the former floating floor structure 100 using the cushioning material 120 (see FIG. 4A) is low in material cost and construction cost, but air generated in the air layer (gap) of these glass wool, rock wool, and the like. The floor impact sound characteristics may be deteriorated by the spring. That is, the cushioning material 120 made of glass wool, rock wool, or the like has a problem that the natural frequency is high and the sound insulation performance is inferior to the heavy floor impact sound. In addition, due to the fact that these cushioning materials 120 contain moisture, the vibration-proof performance and sound-insulating performance may be reduced, and the creep load resistance may change over time. It is necessary to design, and it may take time to construct a high-quality sound insulation structure.

  In addition, the floating floor structure 200 (see FIG. 4B) using the latter bundle material 220 has a low natural frequency and can ensure excellent vibration isolation performance, but has a large number of members to be used. Since the construction takes time, there is a problem that the material cost and the construction cost increase. In other words, in the floating floor structure 200, as the bundle material 220, the columnar vibration-proof rubber 221, the base 222 of the vibration-proof rubber 221, and the connection for connecting the bundle material 220 and the floor material 230 are arranged at the upper end of the vibration-proof rubber 221. A plate 223 is required, and a base panel 231 for supporting the flooring 230 is required between the flooring 230 and the bundle 220, and a lot of materials are used.

  An object of the present invention is to solve the above-mentioned problems, and to propose a floor structure that can be constructed easily and inexpensively and that can realize excellent vibration-proof performance and sound-insulation performance. To do.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a floor structure formed by laminating on an upper surface of a floor slab, wherein a buffer vibration-proof material is laid on the upper surface of the floor slab. A double floor layer comprising a vibration layer, a plate material laid on the upper surface of the buffer vibration-proof layer, and a plurality of bundle members arranged at predetermined intervals on the upper surface of the plate material, and laid on the upper surface of the double floor layer The floor finish layer is provided.

  Such a floor structure is constructed simply by laying a buffer vibration isolator on the floor slab, installing a plate material and a bundle on the buffer anti-vibration material, and laying a floor finish on the bundle. Therefore, it is excellent in workability, has a small number of members, and has a low material cost. And since the solid propagation sound generated in this floor structure is partly absorbed by the double floor layer, the vibration sound is absorbed and reduced by the buffer anti-vibration layer. Achieves sound insulation performance. Moreover, if the plate material and the bundle material are formed of concrete members, the material cost is low and the construction with a predetermined shape is easy, and excellent vibration-proof performance is exhibited by the multilayer structure with the buffer vibration-proof material. . Moreover, since a double floor layer constructs a double floor structure with a bundle material, it does not require the space required for piping space etc. or a process, and is suitable.

In the floor structure, if the damping material has a dynamic spring constant capable of setting the natural frequency of the double floor layer within a range of 10 Hz to 20 Hz, a floor finish material It is suitable because it has sufficient load-bearing characteristics with respect to the overload loaded on the floor structure including the above, and exhibits excellent vibration isolation performance.
In addition, by using a rubber sheet having a dynamic spring constant in the range of 500 to 3000 N / mm · m ² when the loaded load is in the range of 1700 to 4400 N / m ² as the buffer vibration isolator, An air layer is not formed, and excellent sound insulation performance can be exhibited.

Here, the floor sound insulation performance of the apartment house is often determined mainly by the bending rigidity and surface density of the slab determined mainly by the area and thickness of the slab, the method of fixing the slab and the surrounding beams, and the like. In a general housing complex, the slab thickness is about 200 mm, the slab area is about 30 m ² , and is often fixed on four sides, and the natural frequency is in the 63 Hz band. The floor structure according to the present invention improves the sound insulation performance and improves the sound insulation performance by the floating floor structure composed of the buffer vibration-proof layer and the double floor layer for the frequency band (natural frequency) of the slab. It is intended.

In addition, when the present applicant adopts the double floor structure for the slab structure of the general apartment house based on the measurement results in the actual building, etc., the natural frequency of the double floor layer is set to the 10 Hz band. It has been confirmed that the sound insulation performance is improved by setting. In addition, when the load on the floor structure is assumed to be heavier than the load assumed in a general apartment, for example, for commercial use, the natural frequency of the double floor layer is about 10 Hz to 15 Hz. It is preferable that Furthermore, if the building is specially designed for use and the weight on the floor structure is heavier and there is a risk that creep will occur in the buffer anti-vibration layer due to the loading, the natural vibration of the double floor layer The number is preferably set to about 15 Hz to 20 Hz. For this reason, the floor structure according to the present invention employs a damping vibration-proof material having a dynamic spring constant capable of setting the natural frequency of the double floor layer within a range of 10 Hz to 20 Hz. . Here, the anti-vibration effect of the structure is expressed by the relationship between the frequency ratio (f / f _n ) and the vibration transmissibility (τ _r ) expressed by Equation 1, and the dynamic spring constant of the buffer anti-vibration layer is Calculated according to Equation 2.

  Further, in the floor structure of the present invention, if the plate material and the bundle material are each composed of individually formed concrete members, each member can be easily transported and the construction of the floor structure in the field is also possible. Since it is easy, it is preferable.

  According to the present invention, it has become possible to construct a floor structure having excellent anti-vibration performance and sound insulation performance easily and inexpensively.

Preferred embodiments of the present invention will be described with reference to the drawings. In the description, the same reference numerals are used for the same elements, and duplicate descriptions are omitted.
Here, FIG. 1 is a cross-sectional view showing the floor structure according to the present embodiment. Moreover, (a) of FIG. 2 is a perspective view which shows the free access floor which comprises the double floor layer which concerns on this embodiment, (b) is a perspective view which shows the construction condition of a double floor layer. is there. Furthermore, FIG. 3 is a perspective view showing another embodiment of the free access floor constituting the double floor layer.

  In the floor structure 1 according to the present embodiment, as shown in FIG. 1, a buffer vibration-proof layer 10, a double floor layer 20, and a floor finish layer 30 are laminated from below on the upper surface of the floor slab 2. It is constituted by.

The buffer vibration-proof layer 10 is configured by laying a buffer vibration-proof material 11 on the entire upper surface of the floor slab 2. In the present embodiment, a rubber sheet having a dynamic spring constant in the range of 500 to 3000 N / mm · m ² under the condition of a loading load of 1700 to 4400 N / m ² is used as the shock-proof material 11. . By using this shock-proof material 11, the natural frequency of the double floor layer 20 is set to the 10 Hz band. In addition, if the material which can be used as the damping material 11 is a material which has the dynamic spring constant which can set the natural frequency of a double floor layer in the range of 10 Hz or more and 20 Hz or less. The rubber sheet is not limited to the above-mentioned rubber sheet. For example, a well-known shock-absorbing material such as foamed polystyrene, cork, or urethane can be used as appropriate. Needless to say, the range of the dynamic spring constant of the rubber sheet is appropriately set according to conditions such as a load capacity.

  As shown in FIG. 1, the shock-proof material 11 has an area larger than the width of the floor slab 2, that is, a distance between the wall 3 and the wall 3 (only one wall 3 is shown in FIG. 1). Also, the end 11 a is bent upward along the wall 3 at the periphery thereof. Thereby, the upper surface of the floor slab 2 is completely covered with the buffer vibration isolator 11. Note that the length (height) of the end portion 11a of the shock-proof material 11 that is bent upward along the wall 3 does not exceed the height of the double floor layer 20. Further, the end 11 a is in close contact with the surface of the wall 3, and is configured such that no gap is formed between the shock-proof material 11 and the wall 3.

  The double floor layer 20 is configured by laying a surface support type free access floor 21 on the upper surface of the buffer vibration-proof layer 10. A level adjusting material 24 for maintaining the flatness of the floor finish layer 30 is placed on the upper surface (upper end) of the free access floor 21.

  As shown in FIG. 1 and FIG. 2A, the free access floor 21 includes a plate member 22 and a plurality of bundle members 23, 23 (four in this embodiment) arranged on the upper surface of the plate member 22 at a predetermined interval. It is composed of ... The free access floor 21 forms an underfloor space 25 in which an underfloor facility P such as piping can be arranged between the floor finish layer 30 and the buffer vibration-proof layer 10.

As shown in FIGS. 2A and 2B, the plate member 22 is a precast concrete member formed in a rectangular shape (square in the present embodiment) in plan view, and a bundle member 23 described later in the vicinity of the four corners. Screw holes 22h, 22h,... Capable of screwing the screw part 23b are formed. Further, the shape of the plate material 22 is such that the free access floor 21 has a predetermined weight, and the buffering and vibration isolating material 11 has a buffering function and a vibration isolating function by constantly applying a load to the buffering vibration isolating material 11. The shape is not limited as long as the shape can be exhibited. In the present embodiment, the shape of the plate member 22 is 500 mm × 500 mm and the plate thickness is 30 to 60 mm. However, when the load is large and the dynamic spring constant of the buffer vibration-proof layer 10 increases, two In order to set the natural frequency of the heavy floor layer 20 to about 10 Hz, the plate thickness may be set to 100 mm or more.
In the present embodiment, a precast concrete member formed in a substantially square shape in plan view is used as the plate material 22, but it goes without saying that the shape of the plate material 22 is not limited to a square in plan view. What is necessary is just to set suitably according to the planar shape etc. in which the structure 1 is installed. Needless to say, the plate member 22 is not limited to a concrete member. For example, the plate member 22 may be appropriately selected from known materials such as a steel member.

  Four bundle members 23 are arranged on one plate member 22, and a main body portion 23 a which is a precast concrete member formed in a square pillar shape, and a screw protruding downward from the lower end of the main body portion 23 a. Part 23b. The screw portion 23 b is screwed into the screw hole 22 h of the plate member 22. Note that the number of the bundle members 23 may be set as appropriate according to the shape of the plate member 22, the mounted load, and the like, and is not limited to four pieces with respect to the plate member 22. In addition, the shape of the bundle member 23 (main body portion 23a) is not limited to a quadrangular column as long as it has sufficient proof strength against an overload or vibration, and may be, for example, a columnar shape or a plate shape. . Further, the bundle member 23 is not limited to a concrete member, and may be configured by appropriately selecting from known materials such as a steel member.

Here, the free access floor 21 has a predetermined weight, and is configured to be able to exhibit the buffering function and the vibration isolating function of the buffer anti-vibration material 11 by constantly applying a load to the buffer anti-vibration material 11. If it is, the size of the main body portion 23a is not limited, but in the present embodiment, it is formed to have a 50 mm square and a height of about 100 mm.
Needless to say, the fixing method of the plate member 22 and the bundle member 23 is not limited to screwing via screws (screw holes 22h and screw portions 23b). It only has to be selected. Furthermore, the arrangement of the bundle member 23 is not limited to the four corners of the plate member 22, and may be set as appropriate according to the loading load, the strength of the bundle member 23, the shape of the plate member 22, and the like.

  As shown in FIG. 1, the level adjusting member 24 is a flat rubber sheet formed in a plane area larger than the cross-sectional shape of the bundle member 23, and is disposed at the upper end of each bundle member 23, 23,. ing. The thickness of the level adjusting material 24 is not limited as long as the flatness of the floor finish layer 30 can be maintained by the expansion and contraction.

As shown in FIG. 1, the floor finishing layer 30 is laid on the upper surface of the double floor layer 20.
The floor finishing layer 30 is disposed on the lower surface of the floor finishing material 31 made of a plywood and a floor finishing material 31 made of a flooring material or the like covering the surface (upper surface) of the floor structure 1. It is comprised from the upholstery material 32. In the present embodiment, the end of the floor finishing layer 30 is brought into contact with the wall 3 so that no gap is formed between the floor finishing layer 30 and the wall 3. 3 may be formed so as to allow ventilation between the underfloor space 25 of the double floor layer 20.

  As shown in FIG. 1, the floor structure 1 is first constructed by laying a shock-proof material 11 on the upper surface of a floor slab 2 made of reinforced concrete to form a shock-proof layer 10. At this time, the buffer vibration isolator 11 is laid so that the peripheral edge portion 11 a is bent upward along the wall 3 and completely covers the upper surface of the floor slab 2.

Next, the free access floor 21 is laid on the upper surface of the buffer vibration-proof layer 10 to form the double floor layer 20.
As for the laying of the free access floor 21, plate materials 22, 22,... Pre-constructed in a factory or the like are laid in order on the upper surface of the shock-proof material 11 in order by human power, as shown in FIG. It completes by arranging the bundle material 23 by screwing the screw part 23b in the screw hole 22h of 22. FIG. The free access floor 21 may be laid after the bundle members 23, 23,...

  When the laying of the free access floor 21 is completed, as shown in FIG. 1, the discard material 32 is laid horizontally on the upper surface of the free access floor 21 via the level adjusting material 24. The level adjusting member 24 is integrally fixed to the upper surface of the bundle member 23 and the lower surface of the discard member 32 via an adhesive. And the floor structure 1 is completed by sticking the floor finishing material 31 on the surface (upper surface) of the discarding material 32. At this time, the end portions of the floor finishing material 31 and the scraping material 32 are laid in contact with each other so that a gap is not formed between the wall 3 and the end portion. In addition, the fixing method of the level adjusting material 24 is not limited, For example, what is necessary is just to select suitably from well-known methods, such as a fitting system.

  Here, the adhesive used for the floor structure 1 is not limited, but an adhesive that is excellent in adhesiveness between members and that does not generate formaldehyde or other harmful substances is appropriately selected and used. To do.

  As described above, according to the floor structure 1 of the present embodiment, the vibration generated on the surface of the floor structure 1 (the surface of the floor finishing material 31) is temporarily stopped at the upper end of the bundle material 23 in the double floor layer 20. After being concentrated, the vibration energy is attenuated in the double floor layer 20 because it is dispersed in the plate material 22 at the lower end of the bundle material 23. Furthermore, since the vibration energy transmitted to the plate material 22 is absorbed and reduced by the shock-proof material 11 in the shock-proof and vibration-proof layer 10, the vibration-proof and sound-damping effects are excellent. That is, the floor structure 1 exhibits a function as a floating floor structure having excellent vibration and sound insulation performance.

  Since the anti-vibration rubber sheet is used as the buffer anti-vibration material 11, the floor impact sound characteristic is maintained without forming an air spring like glass wool or rock wool, and stable vibration and sound insulation is achieved. It is possible to obtain an effect.

In addition, because the shock-proof material 11 is a rubber sheet having a dynamic spring constant in the range of 500 to 3000 N / mm · m ² under a load load of 1700 to 4400 N / m ² . In order to have sufficient load-bearing characteristics with respect to the overload loaded on the floor structure 1 including the double floor layer 20 and the floor finish layer 30 and the like, and exhibit excellent vibration isolation performance, Is preferred.
Moreover, since the natural vibration frequency of the double floor layer 20 is set in the 10 Hz band by the buffer vibration isolator 11 (buffer anti-vibration layer 10), the sound insulation performance is improved.

  The plate material 22 and the bundle material 23 constituting the double floor layer 20 are configured by a precast concrete member so that they can be easily integrated, so that they are excellent in workability and can greatly reduce the construction period. Yes. Moreover, since it is comprised with comparatively cheap concrete and there are few members compared with the conventional double floor structure, it has enabled the significant reduction in cost.

  By using the free access floor 21 in which the bundle members 23 are arranged at a predetermined interval, an underfloor space 25 is formed inside the floor structure 1 and a predetermined underfloor facility P such as a pipe can be arranged. Since processing for forming the underfloor space 25 is not required, it is excellent in workability and economy. That is, according to the floor structure 1, the function as a double floor structure can be easily configured without requiring special processing. Moreover, it is not necessary to secure a space required for separately forming the double floor structure, and the floor structure 1 enables space saving.

  Regarding the formation of the double floor layer 20, since the free access floor 21 is formed in a shape (weight) that can be laid by human power, even if it is difficult to lay using a machine due to a limited work space, Is preferable.

  In the present embodiment, the free access floor 21 is laid by human power, but may be laid using a construction machine such as a crane (not shown). In the case of using a construction machine such as a crane, as shown in FIG. 3, as the free access floor 21 ′, for example, a large plate material 22 ′ having a shape (2 m × 1 m) approximately eight times the plate material 22 is used. Can be used, and the construction period can be greatly shortened.

  In addition, since the free access floor 21 is constituted by the plate material 22 having a predetermined thickness and the bundle member 23 having a predetermined cross-sectional shape, the free access floor 21 has a predetermined weight, It is possible to maintain the anti-vibration performance and sound reduction performance of the buffer anti-vibration material 11 while maintaining a state where a load is loaded on the buffer anti-vibration material 11.

  In the floor structure 1 of the present embodiment, the level adjusting material 24 interposed between the bundle material 23 and the scraping material 32 maintains the level of the floor finishing layer 30 and propagates from the upper surface of the floor finishing material 31. In order to absorb the vibration which is carried out, it has the structure which was more excellent in buffering and vibration proofing.

  Since the floor structure 1 according to the present embodiment is mainly composed of a rubber sheet and a concrete member, the buffer vibration-proof performance and the sound reduction performance due to moisture (humidity) and the like are not reduced or deteriorated, and long-term. Can be used. Therefore, since the floor structure 1 does not require waterproofing work, it is excellent in workability compared with the conventional floor structure and can be constructed at low cost.

Heretofore, an example of a preferred embodiment has been described for the present invention. However, the present invention is not limited to the above-described embodiment, and the design of each of the above-described components can be appropriately changed without departing from the spirit of the present invention.
For example, in the embodiment, as the free access floor constituting the double floor layer, the individually loaded plate material and the bundle material are assembled on site, but the plate material and the bundle material are integrally configured in advance. You may carry things in.

  Moreover, although the precast member was used as the free access floor, it goes without saying that it may be constructed by on-site construction.

  In addition, in order to maintain the level of the floor finishing layer, the level adjustment material is interposed between the bundle and the scraping material. However, the level adjustment of the floor finishing layer is not limited to that using a rubber material. Needless to say, it can be appropriately performed by known level adjusting means.

  The application location of the floor structure according to the present invention is not limited, and can be applied to the floor structure of any structure such as an apartment house, a hotel, an acoustic-related facility, and a complex facility.

It is a cross-sectional view which shows the floor structure concerning this Embodiment. (A) is a perspective view which shows the free access floor which comprises the double floor layer which concerns on this embodiment, (b) is a perspective view which shows the construction condition of a double floor layer. It is a perspective view which shows the other form of the free access floor which comprises a double floor layer. (A), (b) is a cross-sectional view which shows the conventional floor structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Floor structure 2 Floor slab 10 Buffer vibration-proof layer 11 Buffer vibration-proof material 20 Double floor layer 21 Free access floor 22 Plate material 22h Screw hole 23 Bundle material 23b Screw part 30 Floor finish layer 31 Floor finish material

Claims (3)

A floor structure laminated on the upper surface of the floor slab,
A buffer anti-vibration layer formed by laying a buffer anti-vibration material on the upper surface of the floor slab;
A double floor layer composed of a plate material laid on the upper surface of the buffer vibration-proof layer and a bundle of materials arranged at a predetermined interval on the upper surface of the plate material;
And a floor finishing layer laid on the upper surface of the double floor layer.   The shock-absorbing vibration-proof material has a dynamic spring constant capable of setting a natural frequency of the double floor layer within a range of 10 Hz to 20 Hz. The floor structure described.   The floor structure according to claim 1 or 2, wherein the plate material and the bundle material are individually formed concrete members.

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