JPH0913645A - Soundproof double floor - Google Patents
Soundproof double floorInfo
- Publication number
- JPH0913645A JPH0913645A JP16324295A JP16324295A JPH0913645A JP H0913645 A JPH0913645 A JP H0913645A JP 16324295 A JP16324295 A JP 16324295A JP 16324295 A JP16324295 A JP 16324295A JP H0913645 A JPH0913645 A JP H0913645A
- Authority
- JP
- Japan
- Prior art keywords
- floor
- floor material
- joists
- soundproof double
- soundproof
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Floor Finish (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は防音二重床に関し、詳し
くは、コンクリート床スラブなどの床基盤上に支持脚を
介して根太を支持し、この根太上に木質の床材を設けて
なる防音二重床に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof double floor, and more specifically, a joist is supported on a floor base such as a concrete floor slab via supporting legs, and a wooden floor material is provided on the joist. Regarding soundproof double floor.
【０００２】[0002]
【従来の技術】従来、図７に示すような防音二重床が知
られている。この図の（Ａ）は断面図を示し、（Ｂ）は
床基盤１を除く裏面図を示している。この防音二重床
は、コンクリートスラブなどの床基盤１上に、適宜間隔
を開けて支持脚２を立設し、それぞれの支持脚２の上
に、合板などの木質の床材４を設けるための根太３を支
持しているものである。また、支持脚２は防振ゴムなど
の振動吸収体2aに金属パイプなどの支柱2bを立設したも
のであって、振動吸収体2aを床基盤１側に配して用いら
れている。2. Description of the Related Art Conventionally, a soundproof double floor as shown in FIG. 7 has been known. (A) of this figure shows a cross-sectional view, and (B) shows a back view excluding the floor base 1. In this soundproof double floor, support legs 2 are erected on a floor base 1 such as a concrete slab at appropriate intervals, and a wooden floor material 4 such as plywood is provided on each support leg 2. It supports the joists of No. 3. The support leg 2 is a vibration absorber 2a such as a vibration proof rubber and a support 2b such as a metal pipe standing upright on the vibration absorber 2a. The vibration absorber 2a is disposed on the floor base 1 side.
【０００３】このような防音二重床にあっては、床材４
との間に空間を有して、防音、防振、防寒性に優れると
ともに、この空間を配線、配管などのスペースに有効に
使用することができるものである。In such a soundproof double floor, the floor material 4
It has a space between and and is excellent in soundproofing, vibrationproofing, and coldproofing, and can be effectively used as a space for wiring, piping, and the like.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記の
従来例にあって、低音域の床衝撃音が支持脚２を介して
床下に伝搬する固体伝搬経路が問題となり、このような
防音二重床の防音性能は、床材４の低次の曲げ共振モー
ドが、６３Ｈｚ１／１オクターブバンドに集中してい
る。なお、ここに言う６３Ｈｚ１／１オクターブバンド
とは、４５〜８９Ｈｚの周波数帯であって、ＪＩＳ規格
の「建築物の現場におにける床衝撃音レベルの測定方法
（ＪＩＳ−Ａ−１４１８）」に示されている。However, in the above-mentioned conventional example, there is a problem with the solid propagation path through which the floor impact sound in the low frequency range propagates under the floor via the supporting legs 2, and such a soundproof double floor is provided. Regarding the soundproofing performance, the low-order bending resonance mode of the flooring 4 is concentrated in the 63 Hz 1/1 octave band. The 63 Hz 1/1 octave band referred to here is a frequency band of 45 to 89 Hz, and is a JIS standard “Measuring method for floor impact sound level at construction site (JIS-A-1418)”. Is shown in.
【０００５】この固体伝搬経路における防音性能の改善
のためには、防振ゴムの弾性を小さくして防音性能を向
上させることが考えられる。しかしながら、防振ゴムの
弾性を小さくすると、床材の耐荷重性が低下してフワフ
ワしたような歩行感となる点で問題があった。In order to improve the soundproofing performance in the solid propagation path, it is considered that the elasticity of the antivibration rubber is reduced to improve the soundproofing performance. However, if the elasticity of the anti-vibration rubber is reduced, there is a problem in that the load resistance of the floor material is reduced and a fluffy walking feeling is obtained.
【０００６】本発明は、以上のような問題点を解決する
ためになされたものであり、その目的は、低音域におい
ても防音性能が高く、かつ、耐荷重性が良好であり歩行
感に優れる防音二重床の提供にある。The present invention has been made to solve the above problems, and its purpose is to provide high soundproofing performance even in a low sound range, good load resistance, and excellent walking feeling. In providing soundproof double floors.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決する請求
項１記載の発明は、床基盤１上に支持脚２を介して根太
３を支持し、この根太３上に木質の床材４を設けてなる
防音二重床において、床材４の三次曲げ共振モード波長
の１／５以下の間隔でそれぞれの根太３を設けてなるこ
とを特徴として構成している。In order to solve the above-mentioned problems, the invention according to claim 1 supports a joist 3 on a floor base 1 via supporting legs 2, and a wooden floor material 4 is supported on the joist 3. The soundproof double floors provided are characterized in that the joists 3 are provided at intervals of ⅕ or less of the third-order bending resonance mode wavelength of the floor material 4.
【０００８】根太３としては、一般的な松、栂、杉、
桧、集成材などの木質材料や樹脂成形体などのような、
建築材料を用いるとよい。The joists 3 are general pine, toga, cedar,
Such as wood materials such as cypress, laminated wood, and resin moldings,
Use building materials.
【０００９】木質の床材４としては、合板、パーチクル
ボードなどの床下地材に、表面仕上げ材としてカーペッ
トなどを貼着したような一般的な構成のものを用いるこ
とができ、このような床材４の弾性係数はおおむね３×
１０-9程度のものである。As the wooden floor material 4, a general construction having a floor base material such as plywood or particle board and a carpet or the like as a surface finishing material can be used. The elastic modulus of 4 is about 3 ×
It is about 10 -9 .
【００１０】請求項２記載の発明は、請求項１記載の発
明において、根太３を直交させて設けてなることを特徴
として構成している。The invention according to claim 2 is characterized in that, in the invention according to claim 1, the joists 3 are provided so as to be orthogonal to each other.
【００１１】請求項３記載の発明は、請求項１記載の発
明において、床材４の一次または三次曲げ共振モードの
腹部に根太３を設けたこと特徴として構成している。The invention according to claim 3 is characterized in that, in the invention according to claim 1, a joist 3 is provided on the abdomen of the primary or tertiary bending resonance mode of the flooring 4.
【００１２】[0012]
【作用】請求項１記載の発明では、それぞれの根太３の
間隔を、床材４の三次曲げ共振モード波長に対して１／
５以下の間隔としているので、床材４は根太３の間隔が
小さくなることによって曲げ剛性が大きくなる。したが
って、床材４の共振周波数が高くなって、制振効果が働
き、固体伝搬しにくくなっている。In the invention of claim 1, the distance between the joists 3 is 1 / third of the third bending resonance mode wavelength of the floor material 4.
Since the spacing is 5 or less, the flexural rigidity of the flooring material 4 is increased by the reduction of the spacing between the joists 3. Therefore, the resonance frequency of the floor material 4 becomes high, the damping effect works, and it becomes difficult for the solid to propagate.
【００１３】請求項２記載の発明では、根太３を直交さ
せているので、床材４の曲げ剛性が大きくなる。したが
って、床材４の共振周波数が高くなって、制振効果が働
き、固体伝搬しにくくなっている。According to the second aspect of the present invention, since the joists 3 are orthogonal to each other, the bending rigidity of the flooring 4 is increased. Therefore, the resonance frequency of the floor material 4 becomes high, the damping effect works, and it becomes difficult for the solid to propagate.
【００１４】請求項３記載の発明では、床材４の一次ま
たは三次曲げ共振モードの腹部に根太３を設けることに
よって、床材４の曲げ振動に対する床材４の曲げ剛性が
大きくなる。したがって、床材４の共振周波数が高くな
って、制振効果が働き、固体伝搬しにくくなっている。According to the third aspect of the present invention, by providing the joists 3 on the abdomen of the primary or tertiary bending resonance mode of the floor material 4, the flexural rigidity of the floor material 4 against bending vibration of the floor material 4 is increased. Therefore, the resonance frequency of the floor material 4 becomes high, the damping effect works, and it becomes difficult for the solid to propagate.
【００１５】[0015]
【実施例】本発明の一実施例について以下に添付図を参
照して説明する。図１ないし図３は、本実施例の防音二
重床の構成を示す図である。An embodiment of the present invention will be described below with reference to the accompanying drawings. 1 to 3 are views showing the structure of the soundproof double floor of this embodiment.
【００１６】これらの図に示すように、この防音二重床
は、コンクリートスラブの床基盤１上に、適宜間隔を開
けて支持脚２を立設し、それぞれの支持脚２の上に、床
材４を設けるための４５mm角の根太３を支持させてい
る。床材４としては、板材厚み１５mmの木質床フロア材
を用いており、この木質フロア材の弾性率は２．９×１
０-9Paである。支持脚２は防振ゴムを振動吸収体2aと
し、この振動吸収体2aに金属パイプなどの支柱2bを立設
したものであって、振動吸収体2aを床基盤１側に配して
用いている。この振動吸収体2aとして用いた防振ゴム
は、硬度５０度のものである。As shown in these figures, in this soundproof double floor, support legs 2 are erected on a concrete slab floor base 1 at appropriate intervals, and a floor is placed on each support leg 2. The joists 3 of 45 mm square for providing the material 4 are supported. As the floor material 4, a wooden floor material having a plate thickness of 15 mm is used, and the elastic modulus of this wooden floor material is 2.9 × 1.
It is 0 -9 Pa. The support leg 2 is a vibration absorber 2a made of a vibration absorber, and a support 2b such as a metal pipe is erected on the vibration absorber 2a. The vibration absorber 2a is arranged on the floor base 1 side for use. There is. The anti-vibration rubber used as the vibration absorber 2a has a hardness of 50 degrees.
【００１７】なお、床材４のサイズは、日本建築総合試
験所において、床衝撃音計測を行うサイズであって、２
４４０mm×１７４０mmである。The size of the floor material 4 is the size at which floor impact sound is measured at the Japan Building Research Institute,
It is 440 mm x 1740 mm.
【００１８】このような防音二重床にあっては、床材４
との間に空間を有しているので、防音、防振、防寒性に
優れるとともに、この空間を配線、配管などのスペース
に有効に使用することができるものである。In such a soundproof double floor, the floor material 4
Since it has a space between it and, it is excellent in soundproofing, vibrationproofing, and coldproofing, and this space can be effectively used as a space for wiring, piping, and the like.
【００１９】以下、さらに具体的に実施例１〜３を詳述
し、比較例と対比して説明する。 （実施例１）図１はこの実施例の防音二重床の構造を示
し、（Ａ）は断面図を示し、（Ｂ）は床基盤１を除く裏
面図を示している。また、（Ｂ）には床材４の三次曲げ
共振モードが、下側にグラフ図として示されている。こ
の三次曲げ共振モード波長Ｌは、図の床材４の幅方向の
長さ２４４０mmに対して、その２／３の１６３０mmとな
っている。Hereinafter, Examples 1 to 3 will be described in more detail, and will be described in comparison with Comparative Examples. (Embodiment 1) FIG. 1 shows a structure of a soundproof double floor of this embodiment, (A) is a sectional view, and (B) is a rear view excluding the floor base 1. Further, in (B), the third-order bending resonance mode of the flooring 4 is shown as a graph on the lower side. The third-order bending resonance mode wavelength L is 1630 mm, which is ⅔ of the length 2440 mm in the width direction of the floor material 4 in the figure.
【００２０】この防音二重床では、それぞれの根太３の
間隔ａを、床材４の三次曲げ共振モード波長Ｌに対して
１／５以下の間隔としている。このため、床材４は根太
３の間隔が小さくなることによって、曲げ剛性が大きく
なっている。したがって、床材４の共振周波数が高くな
って、制振効果が働き、固体伝搬しにくくなり、防音性
能が向上している。In this soundproof double floor, the interval a between the joists 3 is set to be ⅕ or less of the third bending resonance mode wavelength L of the floor material 4. For this reason, the floor material 4 has a large bending rigidity due to the small space between the joists 3. Therefore, the resonance frequency of the flooring material 4 becomes high, the damping effect works, it becomes difficult for the solid matter to propagate, and the soundproof performance is improved.
【００２１】つまり、さらに具体的には、根太３の間隔
ａを３００mmとし、床材４の三次曲げ共振モード波長Ｌ
１６３０mmの１／５以下としている。That is, more specifically, the spacing a between the joists 3 is set to 300 mm, and the third-order bending resonance mode wavelength L of the floor material 4 is set.
It is 1/5 or less of 1630 mm.
【００２２】（実施例２）図２はこの実施例の防音二重
床の構造を示し、（Ａ）は断面図を示し、（Ｂ）は床基
盤１を除く裏面図を示している。また、（Ｂ）には床材
４の三次曲げ共振モードが、左側および下側にグラフ図
として示されている。(Embodiment 2) FIG. 2 shows the structure of a soundproof double floor of this embodiment, (A) shows a sectional view, and (B) shows a rear view excluding the floor base 1. Further, in (B), the third-order bending resonance mode of the flooring material 4 is shown on the left side and the lower side as a graph.
【００２３】この防音二重床では、床材４に一方向の根
太３に対して直交方向の根太５を設けることにより、床
材４の曲げ剛性が大きくなり、それにより床材４の共振
周波数が高くなり、制振効果が働き、固体伝搬しにくく
なり、防音性能が向上している。In this soundproof double floor, the bending rigidity of the floor material 4 is increased by providing the floor material 4 with the joist 5 in the direction orthogonal to the joist 3 in one direction, whereby the resonance frequency of the floor material 4 is increased. , The vibration damping effect works, it is difficult for the solid to propagate, and the soundproofing performance is improved.
【００２４】つまり、さらに具体的には、実施例１の図
に示す縦方向の根太３に対して、横方向に根太３を直交
させて５００mm間隔に設けている。That is, more specifically, the joists 3 in the horizontal direction are orthogonal to the joists 3 in the vertical direction shown in the drawing of the first embodiment and are provided at intervals of 500 mm.
【００２５】（実施例３）図３はこの実施例の防音二重
床の構造を床基盤１を除いて示す裏面図である。この図
に示される根太３は、実施例１の根太３に追加される根
太３を示している。また、この図には床材４の一次およ
び三次曲げ共振モードが、左側および下側にグラフ図と
して示されている。(Embodiment 3) FIG. 3 is a rear view showing the structure of the soundproof double floor of this embodiment except the floor base 1. The joist 3 shown in this figure shows the joist 3 added to the joist 3 of the first embodiment. In addition, the first and third bending resonance modes of the flooring 4 are shown in the figure on the left side and the lower side as graphs.
【００２６】この図に示されるように、床材４の一次お
よび三次曲げ共振モード波形の腹部に根太３を設けるこ
とにより、床材４の曲げ剛性が大きくなるため、床材４
の共振周波数が高くなって、制振効果が働き、固体伝搬
しにくくなり、防音性能が向上している。As shown in this figure, by providing the joists 3 on the abdomen of the primary and tertiary bending resonance mode waveforms of the floor material 4, the flexural rigidity of the floor material 4 increases, so that the floor material 4
The resonance frequency is increased, the damping effect works, it becomes difficult for the solid to propagate, and the soundproofing performance is improved.
【００２７】（比較例１）実施例１の根太３の間隔を６
００mmとして、床材の三次曲げ共振モード波長１６３０
mmの１／５以上としている。(Comparative Example 1) The distance between the joists 3 of Example 1 was set to 6
00 mm, the third bending resonance mode wavelength of the floor material is 1630
It is 1/5 or more of mm.
【００２８】図４、図５、図６は、それぞれ順に、実施
例１、実施例２、実施例３の防音二重床の防音性能を床
衝撃音レベルとして、比較例のものと対比して示したグ
ラフ図である。これらの図では縦軸に床衝撃音レベルを
とり、横軸に床衝撃音の周波数をとっている。そして、
各実施例のものを実線で、比較例のものを破線でプロッ
トして示している。これらの図に示すように、いずれの
実施例の防音二重床における床衝撃音レベルも、比較例
のものより低くなっている。また、特に６３Ｈｚ側の低
周波数域側で改善され、床衝撃音の低音域における伝搬
がよく抑えられている。FIG. 4, FIG. 5 and FIG. 6 respectively show the soundproof performance of the soundproof double floors of Example 1, Example 2 and Example 3 as the floor impact sound level, respectively, in comparison with those of the comparative example. It is the graph figure shown. In these figures, the vertical axis represents the floor impact sound level, and the horizontal axis represents the floor impact sound frequency. And
The solid line of each example and the broken line of the comparative example are shown. As shown in these figures, the floor impact sound level of the soundproof double floors of all the examples is lower than that of the comparative example. Further, it is improved particularly in the low frequency range of 63 Hz, and the propagation of the floor impact sound in the low range is well suppressed.
【００２９】[0029]
【発明の効果】請求項１記載の発明は、根太の間隔を床
材の三次曲げ共振モード波長に対して１／５以下の間隔
としたことによって、床材の共振周波数が高くなり、制
振効果が働き、床衝撃音の６３Ｈｚ１／１オクターブバ
ンドの低音域での床材の振動が抑制されて、防音性能が
向上している。According to the first aspect of the present invention, the space between the joists is set to 1/5 or less with respect to the wavelength of the third-order bending resonance mode of the floor material, so that the resonance frequency of the floor material becomes high and the vibration damping The effect works, and the vibration of the floor material is suppressed in the low frequency range of 63 Hz 1/1 octave band of the floor impact sound, and the soundproof performance is improved.
【００３０】請求項２記載の発明は、床材に一方向の根
太に対して直交方向の根太を設けることによって、床材
の共振周波数が高くなり、制振効果が働き、床衝撃音の
６３Ｈｚ１／１オクターブバンドの低音域での床材の振
動が抑制されて、防音性能が向上している。According to the second aspect of the present invention, the floor material is provided with the joists in the direction orthogonal to the joists in one direction, so that the resonance frequency of the floor material is increased, the damping effect is exerted, and the floor impact sound of 63 Hz1 is generated. The vibration of the floor material is suppressed in the low sound range of the / 1 octave band, and the soundproofing performance is improved.
【００３１】請求項３記載の発明は、床材に床材の一
次、三次曲げ共振モードの腹部に根太を設けることによ
って、床材の共振周波数が高くなり、制振効果が働き、
床衝撃音の６３Ｈｚ１／１オクターブバンドの低音域で
の床材の振動が抑制されて、防音性能が向上している。According to the third aspect of the present invention, the floor material is provided with joists at the abdomen of the primary and third bending resonance modes, so that the resonance frequency of the floor material becomes high and the damping effect is exerted.
The vibration of the floor material is suppressed in the low-pitched range of 63 Hz 1/1 octave band of the floor impact sound, and the soundproof performance is improved.
【図１】本発明の実施例１における防音二重床を示し、
（Ａ）は断面図を示し、（Ｂ）は床基盤を除く裏面図を
示している。FIG. 1 shows a soundproof double floor according to a first embodiment of the present invention,
(A) shows a cross-sectional view, and (B) shows a rear view excluding the floor base.
【図２】本発明の実施例２における防音二重床を示し、
（Ａ）は断面図を示し、（Ｂ）は床基盤を除く裏面図を
示している。FIG. 2 shows a soundproof double floor according to a second embodiment of the present invention,
(A) shows a cross-sectional view, and (B) shows a rear view excluding the floor base.
【図３】本発明の実施例３における防音二重床を示す平
面図である。FIG. 3 is a plan view showing a soundproof double floor according to a third embodiment of the present invention.
【図４】実施例１における防音二重床の床衝撃音レベル
を示すグラフ図である。FIG. 4 is a graph showing the floor impact sound level of the soundproof double floor in Example 1.
【図５】実施例２における防音二重床の床衝撃音レベル
を示すグラフ図である。FIG. 5 is a graph showing a floor impact sound level of a soundproof double floor in Example 2.
【図６】実施例３における防音二重床の床衝撃音レベル
を示すグラフ図である。FIG. 6 is a graph showing the floor impact sound level of the soundproof double floor in Example 3.
【図７】従来例を示す図であって、（Ａ）は断面図を示
し、（Ｂ）は床基盤を除く裏面図を示している。7A and 7B are views showing a conventional example, in which FIG. 7A is a sectional view and FIG. 7B is a rear view excluding a floor base.
１ 床基盤 ２ 支持脚 2a 振動吸収体 2b 支柱 ３ 根太 ４ 床材 1 Floor base 2 Support leg 2a Vibration absorber 2b Strut 3 Joist 4 Floor material
フロントページの続き (72)発明者 中村 康輔 大阪府門真市大字門真1048番地松下電工株 式会社内 (72)発明者 奥澤 将行 大阪府門真市大字門真1048番地松下電工株 式会社内Front page continuation (72) Inventor Kosuke Nakamura 1048, Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Works Co., Ltd. (72) Inventor, Masayuki Okusawa, 1048, Kadoma, Kadoma City, Osaka
Claims (3)
し、この根太上に木質の床材を設けてなる防音二重床に
おいて、床材の三次曲げ共振モード波長の１／５以下の
間隔でそれぞれの根太を設けてなることを特徴とする防
音二重床。1. A soundproof double floor in which a joist is supported on a floor base via supporting legs, and a wooden floor material is provided on the joist, and a third bending resonance mode wavelength of the floor material is ⅕ or less. A soundproof double floor, characterized in that each joist is provided at intervals.
とする請求項１記載の防音二重床。2. The soundproof double floor according to claim 1, wherein the joists are provided so as to be orthogonal to each other.
腹部に根太を設けてなること特徴とする請求項１記載の
防音二重床。3. The soundproof double floor according to claim 1, wherein a joist is provided on the abdomen of the primary or tertiary bending resonance mode of the floor material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16324295A JP3460390B2 (en) | 1995-06-29 | 1995-06-29 | Soundproof double floor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16324295A JP3460390B2 (en) | 1995-06-29 | 1995-06-29 | Soundproof double floor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0913645A true JPH0913645A (en) | 1997-01-14 |
| JP3460390B2 JP3460390B2 (en) | 2003-10-27 |
Family
ID=15770058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16324295A Expired - Fee Related JP3460390B2 (en) | 1995-06-29 | 1995-06-29 | Soundproof double floor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3460390B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4623513B2 (en) * | 2005-10-12 | 2011-02-02 | 積水ハウス株式会社 | Sound insulation base structure of face material |
-
1995
- 1995-06-29 JP JP16324295A patent/JP3460390B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3460390B2 (en) | 2003-10-27 |
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