Vibration-proof floating bed

Abstract

To provide a vibration control floating floor having a reduction effect of the vibration transmitting both in a vertical direction and a horizontal direction.SOLUTION: A vibration control floating floor 70 has a plurality of vibration control floating floor units 40 including a plurality of vibration control materials 20 installed on a floor slab 10 of an architectural structure and a floor support body 30 supported by the plurality of vibration control materials 20, and the plurality of vibration control floating floor units 40 are arranged via a first gap 45 each other, and a common floor material 50 is supported in a whole area of the plurality of vibration control floating floor units 40 in a plan view.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a vibration isolation floating floor.

Background Art

[0002] In various buildings such as houses, condominiums, and hotels, sounds and vibrations such as music sounds, walking sounds (weight impact sounds), and impact sounds (lightweight impact sounds) when objects are dropped on the floor surface emitted by residents or guests on the upper floors are transmitted to the lower floors, causing discomfort to the residents on the lower floors. As one measure to solve such problems, a floating floor method having sound insulation performance and vibration isolation performance may be applied. In this floating floor method, there are a wet floating floor method in which a vibration isolation material (buffer material, sound absorption material) such as glass wool is disposed on a concrete slab or the like, a reinforced concrete slab or the like is constructed thereon, and a surface finishing material (floor material) is constructed thereon, and a dry floating floor method in which vibration isolation materials are arranged at predetermined intervals on a concrete slab or the like, for example, joists (support legs) are installed thereon, a sub-floor material such as particle board is arranged on the joists, and after laying a sound insulation mat or the like thereon, a surface finishing material (floor material) is laid.

[0003] In any of the vibration isolation floating floors (sound insulation and vibration isolation floating floors), whether wet floating floors by the wet floating floor method or dry floating floors by the dry floating floor method, while the effect of reducing vibrations transmitted in the vertical direction to the lower floors can be expected, it has been found that the effect of reducing vibrations transmitted in the horizontal direction cannot be sufficiently expected. By the way, in view of the current usage applications of vibration isolation floating floors, the planar scale of the space is increasing from small spaces to large spaces. Also, for example, there are many large-space living rooms that are larger than ordinary living rooms such as dance studios and music rooms, and in which large vibrations and sounds are generated.

[0004] In such a large-space living room, since a relatively large number of people will be present on the common floor material that constitutes the anti-vibration floating floor at the same time, the vibration generated by the vibration generator will be transmitted horizontally through the floor material and transmitted to other people. Depending on the transmitted vibration, some vibrations can cause discomfort to people due to their frequency. Also, when the large-space living room is partitioned and used as multiple living rooms through walls, the vibration generated by the vibration generator in one living room that cannot be visually recognized through the wall will be transmitted to the people in the other living room, and it will also cause discomfort to the people who are unexpectedly transmitted the vibration. From the above, in addition to the effect of reducing the vibration transmitted in the vertical direction, the development of an anti-vibration floating floor having an effect of reducing the vibration transmitted in the horizontal direction is desired.

[0005] Here, a sound-insulating floor (corresponding to an anti-vibration floating floor) has been proposed that enables improvement of sound-insulating performance by preventing the movement of air in the under-floor space. Specifically, anti-vibration rubber is installed at appropriate intervals on the slab along the wall of the structure, the floor support material is installed supported by the anti-vibration rubber, the floor is attached on the frame of the floor support material, and the gap between the slab and the lower end of the floor support material is filled with glass wool or felt as an air movement blocking material (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] According to the sound insulation floor described in Patent Document 1, the air movement blocking material packed in the gap between the slab and the lower end of the floor support material makes the space under the floor a closed space, and the movement of the air in the space is blocked. Therefore, the sound insulation effect is said to be greater compared to the case where the movement of the air under the floor is not blocked. However, in the sound insulation floor described in Patent Document 1, since the floor is supported only by a large frame-shaped floor support material along the wall, it is not considered that the floor support material has sufficient mass and rigidity. Therefore, it is unclear whether a sufficient vibration isolation effect can be obtained. Therefore, as described above, it is extremely difficult to say that it is a vibration isolation floating floor having a vibration reduction effect for vibrations propagating in both the vertical and horizontal directions.

[0008] The present invention has been made in view of the above problems, and an object thereof is to provide a vibration isolation floating floor having a vibration reduction effect for vibrations propagating in both the vertical and horizontal directions.

Means for Solving the Problems

[0009] To achieve the above object, one aspect of the vibration isolation floating floor according to the present invention includes a plurality of vibration isolation materials installed on the floor slab of a building and a floor support body supported by the plurality of vibration isolation materials, and has a plurality of vibration isolation floating floor units. In a plan view, the plurality of vibration isolation floating floor units are arranged with a first gap therebetween. It is characterized in that a floor material common to the entire area of the plurality of vibration isolation floating floor units is supported.

[0010] According to this aspect, a plurality of vibration isolation floating floor units each including a vibration isolator and a floor support are arranged in a plan view with a first gap therebetween, and a floor material common to the entire area of the plurality of vibration isolation floating floor units is supported, thereby forming a vibration isolation floating floor having an effect of reducing vibrations propagating in both the vertical and horizontal directions. Specifically, since the plurality of vibration isolation floating floor units are horizontally separated from each other via the first gap, horizontal vibration propagation from a floor support member constituting one vibration isolation floating floor unit to a floor support member constituting an adjacent other vibration isolation floating floor unit is suppressed. On the other hand, vibrations are propagated from a vibration isolator supporting the floor support of one vibration isolation floating floor unit, through the floor slab, and via a vibration isolator supporting the floor support of the other vibration isolation floating floor unit to the other floor support. However, in this propagation process, vibrations near the natural frequency of the building structure or the like are reduced. As a result of these, an effect of reducing vibrations in the horizontal direction is achieved.

[0011] Here, the vibration isolation floating floor can also be referred to as a sound and vibration isolation floating floor, and the vibration isolation floating floor of this aspect includes both a dry floating floor and a wet floating floor. The floor support constituting the vibration isolation floating floor unit is a member having a mass and rigidity necessary to exhibit desired vibration isolation performance and sound insulation performance. When the vibration isolation floating floor is a dry floating floor, plywood, a sound insulation mat, etc. are applied as the floor support. When the vibration isolation floating floor is a wet floating floor, a reinforced concrete slab constructed on site or the like is applied as the floor support.

[0012] In the vibration isolation floating floor of this aspect, according to its planar area, a plurality of vibration isolation floating floor units are separated planarly via one or more first gaps. That is, there are forms in which two vibration isolation floating floor units are arranged via one first gap and a floor material common to the entire area of the two vibration isolation floating floor units is supported, or forms in which four vibration isolation floating floor units are arranged via two cross-shaped first gaps and a floor material common to the entire area of the four vibration isolation floating floor units is supported.

[0013] Another aspect of the vibration isolation floating floor according to the present invention is characterized in that a buffer material is interposed in the first gap.

[0014] According to this aspect, since the cushioning material is interposed in the first gap, the vertical vibration propagated in the horizontal direction from the floor supports that are mutually separated in a planar manner can be reduced and eliminated in as short a time as possible. That is, the vibration suppression effect of propagating in the horizontal direction is obtained by the first gap, and the time until the vibration is eliminated (the vibration disappears) by the cushioning material in the first gap is shortened. Here, a glass wool board or the like can be applied as the cushioning material.

[0015] Another aspect of the anti-vibration floating floor according to the present invention is characterized in that, in the first gap, a plurality of the cushioning materials are arranged with a second gap therebetween.

[0016] According to this aspect, by arranging a plurality of cushioning materials with a second gap therebetween in the first gap, in other words, by not completely closing the first gap with the cushioning material, while reducing the usage amount of the cushioning material and suppressing the material cost as much as possible, the vibration propagated in the horizontal direction can be eliminated early.

[0017] In another aspect of the anti-vibration floating floor according to the present invention, the cushioning material is characterized by having lower rigidity and lower resilience than the floor support.

[0018] According to this aspect, by applying a cushioning material having lower rigidity and lower resilience than the floor support, the vibration propagated in the horizontal direction from the left and right floor supports can be reduced and eliminated in as short a time as possible. Examples of such a cushioning material made of such a material include a glass wool board.

[0019] In another aspect of the anti-vibration floating floor according to the present invention, among the floor materials, at a position corresponding to the first gap or the second gap, an air vent hole for discharging the air in the space between the floor support and the floor slab to the outside is provided.

[0020] According to this aspect, in the floor covering, air vent holes are provided at positions corresponding to the first gap or the second gap, so that the air under the anti-vibration floating floor unit is sealed to form a virtual spring with higher rigidity than the anti-vibration material, solving the problem that the vibration damping effect by the anti-vibration material cannot be obtained sufficiently, and making it possible to guarantee the vibration damping effect by the anti-vibration material.

Advantages of the Invention

[0021] According to the anti-vibration floating floor of the present invention, it is possible to provide an anti-vibration floating floor having a vibration reduction effect for vibrations propagating in both the vertical direction and the horizontal direction.

Brief Description of the Drawings

[0022]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Modes for Carrying Out the Invention

[0023] Hereinafter, the anti-vibration floating floor according to each embodiment will be described with reference to the accompanying drawings. In the present specification and the drawings, substantially the same components may be denoted by the same reference numerals, and redundant description may be omitted.

[0024] [Anti-vibration Floating Floor According to the First Embodiment] First, referring to FIGS. 1 and 2, a vibration isolation floating floor according to a first embodiment will be described. Here, FIG. 1 is a plan view of an example of a vibration isolation floating floor according to the first embodiment, and FIG. 2 is a longitudinal sectional view taken along the line II-II of FIG. 1 and is a longitudinal sectional view of an example of a vibration isolation floating floor according to the first embodiment.

[0025] The vibration isolation floating floor 70 has a plurality (two in the illustrated example) of vibration isolation floating floor units 40 provided on the floor slab 10 of the building. The vibration isolation floating floor units 40 include a plurality of vibration isolators 20 installed on the floor slab 10 of the building and a floor support 30 supported by the plurality of vibration isolators 20. In a plan view, the plurality of vibration isolation floating floor units 40 are arranged with a first gap 45 therebetween, and a floor material 50 common to the entire area of the plurality of vibration isolation floating floor units 40 is supported, thereby forming the vibration isolation floating floor 70. The illustrated example shows a state in which the plan view of the building is simply rectangular, and the vibration isolation floating floor 70 is provided between the lower floor (for example, the first floor) and the upper floor (for example, the second floor) inside the rectangular frame-shaped wall 80.

[0026] Here, the vibration isolator 20 is formed of, for example, vibration isolation rubber or a laminate of vibration isolation rubber and a glass wool board (including a high-density glass wool board). The floor slab 10 is, for example, a ceiling slab of the lower floor made of reinforced concrete.

[0027] The floor support 30 can be formed of various members having a desired sound insulation performance and vibration isolation performance and having the minimum necessary mass, such as a sound insulation mat, a PC board, a cement board, a laminate of an asphalt mat, plywood, or a laminate of two or more of these. The floor support 30 in the illustrated example is formed of a sound insulation mat, for example.

[0028] The floor material 50 has a floor base material 51 and a surface finishing material 52. The floor base material 51 is formed of a particle board, an ALC board (Autoclaved Light weight Concrete), plywood, or the like, and the surface finishing material is formed of a flooring material or the like, for example.

[0029] In the vibration isolation floating floor 70, for example, as shown in FIG. 2, the vibration F generated by a person (vibration generator) on the left vibration isolation floating floor unit 40 propagates downward in the vertical direction in the X3 direction. However, in the process of this propagation, the vibration is reduced by the vibration isolation material 20, and the propagation of sound and vibration to the lower floor is suppressed.

[0030] In the vibration isolation floating floor 70, in addition to the vibration F propagating downward in the vertical direction in the X3 direction, it also propagates in the horizontal direction in the X1 direction. However, since the plurality of vibration isolation floating floor units 40 constituting the vibration isolation floating floor 70 are configured to be planarly separated from each other via the first gap 45, the horizontal propagation of vibration through the floor support 30 is suppressed by the first gap 45. On the other hand, a part of the vibration F is propagated from the vibration isolation material 20 supporting the left floor support 30, through the floor slab 10, and then through the vibration isolation material 20 supporting the right floor support 30 to the right floor support 30 in the X2 direction. However, in this propagation process, the vibration near the natural vibration frequency of the building structure or the like is reduced, and thus the vibration reduction effect in the horizontal direction is also achieved.

[0031] Here, the width of the first gap 45 can be set in the range of, for example, about 1 cm to 15 cm, and preferably can be set to about 10 cm.

[0032] Also, in the floor material 50, a plurality of air vent holes 53 are provided at intervals in the longitudinal direction at positions corresponding to the first gap 45.

[0033] Since the floor material 50 is laid over the entire area of the plurality of vibration isolation floating floor units 40, if there are no air vent holes 53 provided at positions corresponding to the first gap 45 in the floor material 50, there will be a certain distance up to the side end (near the wall) especially near the center of the floor material 50 that spreads over the entire area of the living room. Therefore, for example, due to the air in the underfloor space G near the center of the floor material 50 being stagnant and sealed, a virtual spring with higher rigidity than the vibration isolation material 20 may be formed. And there is a risk that the vibration damping effect by the vibration isolation material 20 cannot be sufficiently obtained due to this virtual spring.

[0034] Therefore, an air vent hole 53 is provided at a position corresponding to the first gap 45, so that the air in the underfloor space G, which is the space between the left and right floor supports 30 and the floor slab 10, can be vented to the outside, eliminating the formation of the virtual spring described above and ensuring the vibration damping effect by the vibration damping material 20.

[0035] Although not shown, as the floor area of the living room increases, an anti-vibration floating floor in which four anti-vibration floating floor units are arranged through two cross-shaped first gaps and a common floor material is supported over the entire area of the four anti-vibration floating floor units may be applied. In addition, in other forms, two or more lateral first gaps may be provided at intervals in the longitudinal direction with respect to the longitudinal first gap, and an anti-vibration floating floor in which six or more anti-vibration floating floor units are arranged between the longitudinal and lateral first gaps may be applied.

[0036] [Dry Floating Floor According to the Second Embodiment] Next, with reference to FIGS. 3 and 4, the anti-vibration floating floor according to the second embodiment will be described. Here, FIG. 3 is a plan view of an example of the anti-vibration floating floor according to the second embodiment, and FIG. 4 is a longitudinal sectional view of an example of the anti-vibration floating floor according to the second embodiment taken along the line IV-IV of FIG. 2.

[0037] The anti-vibration floating floor 70A is different from the anti-vibration floating floor 70 in that a plurality of buffer materials 60 are arranged in the first gap 45 of the anti-vibration floating floor 70 through the second gap 47.

[0038] The buffer material 60 is formed of a glass wool board or the like. Further, the buffer material 60 formed of a glass wool board is preferably low in rigidity and low in resilience compared to the floor supports 30 on the left and right thereof.

[0039] Since the buffer material 60 is interposed in the first gap 45, the vibration propagated horizontally from the floor supports 30 separated from each other in a planar manner can be reduced and eliminated (disappeared) in as short a time as possible. Therefore, the first gap 45 provides an effect of suppressing vibration propagating in the horizontal direction, and the buffer material 60 arranged in the first gap shortens the time until the vibration disappears.

[0040] Further, by applying a cushioning material 60 having low rigidity and low resilience as compared with the floor support 30, vibrations propagated horizontally from the left and right floor supports 30 can be reduced and eliminated in an even shorter time. In the case of polystyrene foam (polystyrene containing bubbles) or the like, even if it has low rigidity, it has a large repulsive force, so it is difficult to expect a prompt vibration reduction effect for vibrations propagated horizontally.

[0041] In addition to the illustrated example, cushioning materials may be disposed throughout the entire area of the first gap 45. However, since a plurality of cushioning materials 60 are disposed via the second gap 47 as in the illustrated example, the amount of cushioning material used can be reduced and the material cost can be suppressed as much as possible.

[0042] For example, in the first gap 45 of about 10 cm, a plurality of cushioning materials 60 can be disposed via a second gap 47 in the range of about 10 cm to 50 cm. Further, the cushioning material 60 in the illustrated example is in a form in which a cushioning material having the same height as the first gap 45 is interposed in the first gap 45, but a cushioning material having a height from the floor slab 10 to the top end of the anti-vibration floating floor unit 40 may be applied. In the latter form, the cushioning material is supported by the floor slab 10.

[0043] As shown in FIG. 3, in the anti-vibration floating floor 70A, among the floor materials 50, air vent holes 53 are provided at positions corresponding to the second gap 47 in the first gap 45. As described above, particularly in the under-floor space G near the center of the floor material 50 that spreads over the entire area of the living room, air is likely to stagnate and be sealed. Therefore, it is preferable that air vent holes 53 are provided at positions corresponding to at least the second gap 47 near the center in the longitudinal direction of the first gap 45 among the floor materials 50.

[0044] Although not shown, in the anti-vibration floating floor of the present embodiment as well, as the floor area of the living room increases, four anti-vibration floating floor units are disposed via two cross-shaped first gaps, and a plurality of cushioning materials are disposed via the second gap in each first gap, and an anti-vibration floating floor or the like in a form in which a common floor material is supported over the entire area of the four anti-vibration floating floor units may be applied.

[0045] [Verification Experiment on Vibration Reduction Effect in Horizontal Direction] The inventors of the present invention fabricated a test body (Example) of a vibration-isolation floating floor that simulated FIG. 1 and a test body (Comparative Example) of a vibration-isolation floating floor from which the first gap was removed (without the first gap), and compared the two while specifying the degree of vibration reduction in the horizontal direction for each vibration frequency, thereby conducting an experiment to verify the vibration reduction effect in the horizontal direction of the Example.

[0046] Here, both the Example and the Comparative Example have a vibration isolation material formed of soundproof rubber, a floor support formed of a soundproof mat, and a floor material formed of particle board. FIG. 5 is a plan view of the test bodies of the vibration-isolation floating floor according to the Comparative Example and the Example in the verification test of the vibration reduction effect in the horizontal direction, FIG. 5(a) shows the plan view of the Comparative Example, and FIG. 5(b) shows the plan view of the Example.

[0047] The vibration isolation materials are arranged at intervals of 455 mm vertically, horizontally, left, and right in a plan view. In the Example, two floor supports are arranged with a first gap having a width of 10 mm therebetween, and a common floor material is arranged on the surfaces of both floor supports.

[0048] As shown in FIG. 5(a), in the Comparative Example, a vibration excitation point was provided at a position closer to the upper end among the left and right centers, and two measurement points were provided at positions 455 mm apart and further 1365 mm apart. On the other hand, as shown in FIG. 5(b), in the Example as well, a vibration excitation point and two measurement points were provided at the same positions as in the Comparative Example. However, in the Example, the two floor supports on which the two measurement points are arranged are planar-ly separated by the first gap.

[0049] In both the Comparative Example and the Example, the floor material was vibrated by an impulse hammer at the vibration excitation point, and the vibration acceleration was measured by an acceleration sensor installed at each measurement point. Further, the measured vibration acceleration was decomposed into frequency components by an FFT (Fast Fourier transform) analyzer, and the relationship between the vibration acceleration level and the frequency components (1 / 3 octave band center frequency) was specified. The experimental results are shown in FIG. 6.

[0050] As shown in Fig. 6, the peak values of the vibration acceleration levels are between 8 Hz and 16 Hz for both the comparative example and the example. However, it has been demonstrated that the peak value of the vibration acceleration level of the example is reduced by about 3 dB compared to the comparative example. Furthermore, the vibration acceleration level of the example is significantly reduced compared to the comparative example in any frequency band, either in the high-frequency band above 16 Hz or in the low-frequency band below 4 Hz. For example, at 31.5 Hz, a reduction in the vibration acceleration level of about 35 to 40 dB has been demonstrated.

[0051] From this experiment, it has been demonstrated that by applying a vibration-isolation floating floor configured such that the floor support is divided into a plurality of parts via the first gap, a vibration reduction effect for horizontally propagating vibrations can be obtained in almost the entire frequency range from the low-frequency band of 1 Hz to 63 Hz, including the peak value of the vibration acceleration level.

[0052] In addition, other embodiments in which other components are combined with the configurations described in the above embodiments may be possible, and the present invention is not limited to the configurations shown here at all. In this regard, it can be changed without departing from the gist of the present invention and can be appropriately determined according to the application form.

Explanation of Reference Numerals

[0053] 10: Floor slab 20: Vibration isolator 30: Floor support 40: Vibration-isolation floating floor unit 45: First gap 47: Second gap 50: Floor material 51: Subfloor material 52: Surface finishing material 53: Air vent hole 60: Buffer material 70, 70A, 70B: Vibration-isolation floating floor 80: Wall G: Underfloor space

Claims

1. A vibration isolation floating floor unit comprising a plurality of vibration isolators installed on a floor slab of a building and a flat floor support directly supported by the plurality of vibration isolators, the vibration isolation floating floor unit being arranged in a large space living room to suppress the propagation of horizontal vibration between them. There are a plurality of such vibration isolation floating floor units, In each of the vibration isolation floating floor units, in plan view, a plurality of island-shaped vibration isolators are arranged at intervals in the vertical and horizontal directions and are disposed with a first gap therebetween. A common floor material is supported over the entire area of the plurality of vibration isolation floating floor units. An anti-vibration floating floor, characterized in that, in the floor material, air vent holes are provided at positions corresponding to the first gap for venting air in the space between the floor support and the floor slab to the outside.

2. The anti-vibration floating floor according to claim 1, characterized in that a buffer material is interposed in the first gap.

3. The anti-vibration floating floor according to claim 2, characterized in that, in the first gap, a plurality of the buffer materials are disposed with a second gap therebetween.

4. The anti-vibration floating floor according to claim 2 or 3, characterized in that the buffer material has lower rigidity and lower resilience than the floor support.

5. The anti-vibration floating floor according to claim 3, characterized in that the air vent holes are provided at positions corresponding to the second gap.

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