JP5901204B2 - Sound insulation floor structure - Google Patents

Sound insulation floor structure Download PDF

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JP5901204B2
JP5901204B2 JP2011217105A JP2011217105A JP5901204B2 JP 5901204 B2 JP5901204 B2 JP 5901204B2 JP 2011217105 A JP2011217105 A JP 2011217105A JP 2011217105 A JP2011217105 A JP 2011217105A JP 5901204 B2 JP5901204 B2 JP 5901204B2
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郷 高木
郷 高木
俊哉 坂牧
俊哉 坂牧
雅俊 大前
雅俊 大前
憲之 古屋敷
憲之 古屋敷
秀明 守時
秀明 守時
伸介 西谷
伸介 西谷
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Sumitomo Forestry Co Ltd
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Description

本発明は、遮音床構造に関し、特に木造住宅建築物において、上階と下階との間の床部に設けられる遮音床構造に関する。   The present invention relates to a sound insulation floor structure, and more particularly to a sound insulation floor structure provided in a floor portion between an upper floor and a lower floor in a wooden house building.

例えば２階以上の複数階のフロアを有する木造住宅建築物では、上階のフロアで生じる床衝撃音が下階のフロアに伝達されるのを軽減して、騒音等による弊害を回避できるようにするための種々の工夫がなされている。床衝撃音には、例えば子供が飛び跳ねたり走り回ったりした時の音や、階段、廊下等における足音などの重量床衝撃音と、物の落下音、椅子や家具の移動音、掃除機を引きずる音などの軽量床衝撃音とがあり、これらの衝撃音に対しては、例えば床下地板の上に合成ゴム等からなる緩衝材を敷設すると共に、緩衝材の上に質量１５ｋｇ／ｍ2以上の床下地材を敷設し、これらの床下地板、緩衝材及び床下地材を相互に接着固定したり、ネジ等を用いて貫通固定したりして形成した遮音床構造によって、遮音性能の向上が図られている（例えば、特許文献１参照）。 For example, in a wooden house building with two or more floors, it is possible to reduce the transmission of floor impact sound generated on the upper floors to the lower floors and to avoid harmful effects such as noise. Various ideas have been made for this purpose. The floor impact sound includes, for example, the sound of a child jumping or running around, the heavy floor impact sound such as footsteps in stairs and hallways, the sound of falling objects, the sound of moving chairs and furniture, and the sound of dragging a vacuum cleaner. Lightweight floor impact sounds such as, for example, for these impact sounds, a cushioning material made of synthetic rubber or the like is laid on the floor base plate, and a floor under a mass of 15 kg / m 2 or more is placed on the cushioning material. The sound insulation performance is improved by the sound insulation floor structure formed by laying ground materials and bonding and fixing these floor base plates, cushioning materials and floor base materials to each other or by using screws etc. (For example, refer to Patent Document 1).

特開平１１−１４１０３９号公報Japanese Patent Application Laid-Open No. 11-141039

一方、近年、例えば二世帯住宅用の木造住宅建築物の床構造として、ＪＩＳ Ａ １４１８−２：２０００による重量床衝撃音性能がＬＨ−６０、ＪＩＳ Ａ １４１８−１：２０００による軽量床衝撃音性能がＬＬ−５５、ＪＩＳ Ａ １４１７による室内音圧レベル差性能（遮音性能）がＤ−５０といった性能を満たす、遮音性能の高い仕様の床構造を備える住宅建築物が望まれており、またこのような遮音性能の高い仕様の床構造を、主として市販の材料を組み合わせて、簡易に且つコンパクトに形成できるようにする技術の開発が望まれている。   On the other hand, in recent years, for example, as a floor structure of a wooden house building for a two-family house, a heavy floor impact sound performance according to JIS A 1418-2: 2000 is LH-60 and a light floor impact sound performance according to JIS A 1418-1: 2000. There is a demand for a residential building having a floor structure with a high sound insulation performance that satisfies the performance of LL-55 and JIS A 1417 with a room sound pressure level difference performance (sound insulation performance) of D-50. It is desired to develop a technique that enables a floor structure having a high specification of sound insulation performance to be easily and compactly formed mainly by combining commercially available materials.

本発明は、遮音性能の高い仕様の床構造を、主として市販の材料を組み合わせて、簡易に且つコンパクトに形成できる遮音床構造を提供することを目的とする。   It is an object of the present invention to provide a sound insulation floor structure that can easily and compactly form a floor structure having a high specification of sound insulation performance mainly by combining commercially available materials.

本発明は、木造住宅建築物において、上階と下階との間の床部に設けられる遮音床構造であって、床支持部材によって支持されて、該床支持部材の上面に敷設された床下地材と、該床下地材の上面に敷設された厚さ１〜１０ｍｍのフェルトシート材と、該フェルトシート材の上面に敷設された遮音積層板状体と、該遮音積層板状体の上面に敷設された床仕上材とを含んで構成され、前記遮音積層板状体は、厚さ５〜２４ｍｍの合板と、厚さ９〜２１ｍｍの石膏ボードと、厚さ４〜１２ｍｍのアスファルト系制振材と、厚さ９〜２１ｍｍの石膏ボードとを、これらの順番で積層すると共に、接着剤、粘着剤、又はビス、釘、ステープル等の打込み固定部材を用いて接合一体化して形成されており、前記遮音積層板状体と前記床下地材との間に前記フェルトシート材が介在することで、浮き床構造となっている遮音床構造を提供することにより、上記目的を達成したものである。 The present invention relates to a sound insulation floor structure provided in a floor portion between an upper floor and a lower floor in a wooden house building, and is supported by a floor support member and laid on the upper surface of the floor support member. A ground material, a felt sheet material having a thickness of 1 to 10 mm laid on the upper surface of the floor base material, a sound insulating laminate plate laid on the upper surface of the felt sheet material, and an upper surface of the sound insulating laminate plate The sound-insulating laminated plate-like body is composed of 5 to 24 mm thick plywood , 9 to 21 mm thick gypsum board, and 4 to 12 mm thick asphalt system. It is formed by laminating a vibration material and a gypsum board having a thickness of 9 to 21 mm in this order, and joining and integrating with an adhesive, an adhesive, or a driving and fixing member such as a screw, a nail, or a staple. Between the sound insulation laminated plate and the floor base material By the felt sheet material is interposed, by providing a sound insulation floor structure has a floating floor structure is obtained by achieving the above object.

また、本発明は、木造住宅建築物において、上階と下階との間の床部に設けられる遮音床構造であって、床支持部材によって支持されて、該床支持部材の上面に敷設された床下地材と、該床下地材の上面に敷設された厚さ１〜１０ｍｍのフェルトシート材と、該フェルトシート材の上面に敷設された遮音積層板状体と、該遮音積層板状体の上面に敷設された床仕上材とを含んで構成され、前記遮音積層板状体は、厚さ９〜２１ｍｍの石膏ボードと、厚さ６〜２０ｍｍのアスファルト系制振材と、厚さ９〜２１ｍｍの石膏ボードとを、これらの順番で積層すると共に、接着剤、粘着剤、又はビス、釘、ステープル等の打込み固定部材を用いて接合一体化して形成されており、前記遮音積層板状体と前記床下地材との間に前記フェルトシート材が介在することで、浮き床構造となっている遮音床構造を提供することにより、上記目的を達成したものである。 Further, the present invention provides a sound insulation floor structure provided on a floor portion between an upper floor and a lower floor in a wooden house building, supported by a floor support member, and laid on the upper surface of the floor support member. Floor base material, felt sheet material having a thickness of 1 to 10 mm laid on the upper surface of the floor base material, sound insulating laminated plate material laid on the upper surface of the felt sheet material , and the sound insulating laminated plate material The sound insulation laminated plate-like body is composed of a gypsum board having a thickness of 9 to 21 mm, an asphalt vibration damping material having a thickness of 6 to 20 mm, and a thickness of 9 The 21-mm gypsum board is laminated in this order, and is formed by bonding and integration using an adhesive, an adhesive, or a driving fixing member such as a screw, nail, staple, etc. the felt sheet material between the body and the underfloor member is By standing, by providing a sound insulation floor structure has a floating floor structure is obtained by achieving the above object.

そして、本発明の遮音床構造は、前記床支持部材の下方に吊り天井が取り付けられており、該吊り天井の天井材の上方に積層されて、アスファルト系、ゴム系又は樹脂系弾性系面材と、１層以上の繊維系吸音材とが設けられていることが好ましい。 In the sound insulating floor structure of the present invention, a suspended ceiling is attached below the floor support member, and the asphalt-based, rubber-based, or resin-based elastic surface material is laminated above the ceiling material of the suspended ceiling. And one or more layers of the fiber-based sound absorbing material are preferably provided.

本発明の遮音床構造によれば、遮音性能の高い仕様の床構造を、主として市販の材料を組み合わせて、簡易に且つコンパクトに形成することができる。   According to the sound insulation floor structure of the present invention, a floor structure having a high sound insulation performance can be easily and compactly formed mainly by combining commercially available materials.

本発明の好ましい第１実施形態に係る遮音床構造の構成を説明する断面図である。It is sectional drawing explaining the structure of the sound insulation floor structure which concerns on preferable 1st Embodiment of this invention. 本発明の好ましい第１実施形態に係る遮音床構造の要部の層構成の説明図である。It is explanatory drawing of the layer structure of the principal part of the sound-insulating floor structure based on preferable 1st Embodiment of this invention. 本発明の好ましい第２実施形態に係る遮音床構造の構成を説明する断面図である。It is sectional drawing explaining the structure of the sound-insulating floor structure based on preferable 2nd Embodiment of this invention. 本発明の好ましい第２実施形態に係る遮音床構造の要部の層構成の説明図である。It is explanatory drawing of the layer structure of the principal part of the sound-insulating floor structure based on preferable 2nd Embodiment of this invention. 実施例１の遮音床構造について行った、室内音圧レベル差性能（遮音性能）のRoom sound pressure level difference performance (sound insulation performance) of the sound insulation floor structure of Example 1 実験結果を示すチャートである。It is a chart which shows an experimental result. 実施例１の遮音床構造について行った、重量床衝撃音性能及び軽量床衝撃音性Heavy floor impact sound performance and lightweight floor impact sound performance performed on the sound insulation floor structure of Example 1. 能の実験結果を示すチャートである。It is a chart which shows the experimental result of Noh. 実施例２の遮音床構造について行った、室内音圧レベル差性能（遮音性能）のRoom sound pressure level difference performance (sound insulation performance) of the sound insulation floor structure of Example 2 実験結果を示すチャートである。It is a chart which shows an experimental result. 実施例２の遮音床構造について行った、重量床衝撃音性能及び軽量床衝撃音性Heavy floor impact sound performance and lightweight floor impact sound performance performed on the sound insulation floor structure of Example 2 能の実験結果を示すチャートである。It is a chart which shows the experimental result of Noh.

図１に示す本発明の好ましい第１実施形態に係る遮音床構造１０は、例えば２階以上の複数階のフロアが設けられた、軸組工法や枠組壁工法による木造住宅建築物において、下階３１の天井部でもある上階３０と下階３１との間の床部に、好ましくはＪＩＳ Ａ １４１８−２：２０００による重量床衝撃音性能がＬＨ−６０、ＪＩＳ Ａ １４１８−１：２０００による軽量床衝撃音性能がＬＬ−５５、ＪＩＳ Ａ １４１７による室内音圧レベル差性能（遮音性能）がＤ−５０といった高い遮音性能と同様の、これに近似する高い遮音性能を発揮できる仕様の床構造として採用されたものである。また、本第１実施形態の遮音床構造１０は、このような高い遮音性能を有する床部を、特別に加工した部材を用いることなく、主として汎用されている市販の材料を組み合わせて容易に形成できるようにすると共に、遮音性能を付与する部分の厚さを過度に厚くすることなく、コンパクトに形成できるようにする機能を備える。 The sound insulation floor structure 10 according to the first preferred embodiment of the present invention shown in FIG. 1 is a lower floor in a wooden house building by a frame construction method or a frame construction method, for example, provided with a plurality of floors of two or more floors. The floor portion between the upper floor 30 and the lower floor 31 that is also the ceiling section of the 31 is preferably a heavy floor impact sound performance according to JIS A 1418-2: 2000 is light weight according to LH-60 and JIS A 1418-1: 2000. As a floor structure with specifications that can exhibit high sound insulation performance similar to high sound insulation performance such as floor impact sound performance LL-55 and indoor sound pressure level difference performance (sound insulation performance) D-50 according to JIS A 1417 It has been adopted. In addition, the sound insulation floor structure 10 of the first embodiment is easily formed by combining a commercially available material mainly used for a floor having such a high sound insulation performance without using a specially processed member. In addition to being able to do so, it has a function of enabling compact formation without excessively increasing the thickness of the portion that imparts sound insulation performance.

そして、本第１実施形態の遮音床構造１０は、木造住宅建築物において、上階３０と下階３１との間の床部に設けられる床構造であって、図１及び図２に示すように、床支持部材１１ａ，１１ｂによって支持されて、この床支持部材１１ａ，１１ｂの上面に敷設された床下地材１２と、この床下地材１２の上面に敷設された弾性力を有するシート材１３と、この弾性力を有するシート材１３の上面に敷設された遮音積層板状体１４と、この遮音積層板状体１４の上面に敷設された床仕上材１５とを含んで構成され、遮音積層板状体１４は、木質系面材又はセメント系面材１６と、下層重量面材１７と、アスファルト系、ゴム系又は樹脂系弾性系面材１８と、上層重量面材１９とを、これらの順番で積層すると共に、接着剤、粘着剤、又はビス、釘、ステープル等の打込み固定部材（図示せず）を用いて接合一体化して形成されており、遮音積層板状体１４と床下地材１２との間に弾性力を有するシート材１３が介在することで、浮き床構造となっている。   And the sound insulation floor structure 10 of this 1st Embodiment is a floor structure provided in the floor part between the upper floor 30 and the lower floor 31 in a wooden house building, As shown in FIG.1 and FIG.2. The floor base material 12 supported by the floor support members 11a and 11b and laid on the upper surface of the floor support members 11a and 11b, and the sheet material 13 having elastic force laid on the upper surface of the floor base material 12 And a sound insulation laminated plate 14 laid on the top surface of the elastic sheet material 13 and a floor finishing material 15 laid on the top surface of the sound insulation laminate 14. The plate-like body 14 includes a wood-based face material or cement-based face material 16, a lower-layer weight face material 17, an asphalt-based, rubber-based or resin-based elastic face material 18, and an upper-layer weight face material 19. Laminate in order, adhesive, pressure-sensitive adhesive, or screw A sheet material 13 having elastic force is interposed between the sound insulation laminated plate-like body 14 and the floor base material 12, which are integrally formed using a driving fixing member (not shown) such as a nail or a staple. Therefore, it has a floating floor structure.

また、本第１実施形態の遮音床構造１０は、床支持部材１２の下方に吊り天井２０が取り付けられており、この吊り天井２０の天井材２１の上方に積層されて、アスファルト系、ゴム系又は樹脂系弾性系面材２２と、１層以上の繊維系吸音材２３ａ，２３ｂとが設けられている。   In the sound insulation floor structure 10 of the first embodiment, a suspended ceiling 20 is attached below the floor support member 12 and is laminated above the ceiling material 21 of the suspended ceiling 20 to form an asphalt system or a rubber system. Alternatively, a resin-based elastic face material 22 and one or more fiber-based sound absorbing materials 23a and 23b are provided.

なお、下層重量面材１７や上層重量面材１９を構成する重量面材は、石膏ボード、石膏板、ケイ酸カルシウム板、スラグ石膏板、火山性ガラス質複層板、セメント板等による、０．５〜４．０の密度を有する面材である。また、床仕上材１５には、単層の部材だけでなく、仕上材に必要な下地材や、床暖房パネル、シ−ト材等を合わせた複層の部材も含まれる。   In addition, the weight face material which comprises the lower layer weight face material 17 and the upper layer weight face material 19 is 0 by the gypsum board, the gypsum board, the calcium silicate board, the slag gypsum board, the volcanic glassy multilayer board, the cement board, etc. A face material having a density of .5 to 4.0. Further, the floor finishing material 15 includes not only a single layer member but also a multilayer member including a base material necessary for the finishing material, a floor heating panel, a sheet material, and the like.

本第１実施形態によれば、遮音床構造１０の床下地材１２を支持する床支持部材１１ａ，１１ｂは、木造住宅建築物の床部分の骨組みを形成する公知の部材であって、床梁１１ａや床根太１１ｂ等からなる。   According to the first embodiment, the floor support members 11a and 11b that support the floor base material 12 of the sound-insulating floor structure 10 are known members that form a framework of a floor portion of a wooden house building, and are floor beams. 11a and floor joist 11b.

床支持部材１１ａ，１１ｂの上面に敷設される床下地材１２は、床下地材として市販されている公知の各種の板状部材を用いることができる。本第１実施形態では、例えば杉材からなる厚さが２４ｍｍの剛床パネルが用いられている。床下地材１２は、通常の施工方法と同様にして、例えばビス、釘、ステープル等の打込み固定部材（図示せず）を用いて床支持部材１１ａ，１１ｂに固定される。   As the floor base material 12 laid on the upper surfaces of the floor support members 11a and 11b, various known plate-like members marketed as floor base materials can be used. In the first embodiment, for example, a rigid floor panel made of cedar and having a thickness of 24 mm is used. The floor base material 12 is fixed to the floor support members 11a and 11b using a driving fixing member (not shown) such as screws, nails, staples, etc., in the same manner as in a normal construction method.

床下地材１２の上面に敷設される弾性力を有するシート材１３は、フェルトをシート状に形成して得られた、公知の各種のフェルト製のシート材料を用いることができる。一般品よりも繊維量を増した遮音フェルトを用いることが好ましい。本第１実施形態では、弾性力を有するシート材１３として、好ましくは厚さ１〜１０ｍｍ程度（本第１実施形態では４ｍｍ）のフェルトシート材が用いられている。弾性力を有するシート材１３は、留め付けることなく、敷設しただけの状態で、或いは適宜仮留めした状態で、床下地材１２の上面に敷設される。   As the sheet material 13 having elasticity that is laid on the upper surface of the floor base material 12, various well-known felt sheet materials obtained by forming felt into a sheet shape can be used. It is preferable to use a sound-insulating felt having an increased amount of fibers than a general product. In the first embodiment, a felt sheet material having a thickness of about 1 to 10 mm (4 mm in the first embodiment) is preferably used as the sheet material 13 having elasticity. The sheet material 13 having an elastic force is laid on the upper surface of the floor base material 12 in a state where the sheet material 13 is laid without being fastened, or is temporarily fixed.

フェルトシート材１３の上面に敷設される遮音積層板状体１４は、上述のように、接着剤、粘着剤、又はビス、釘、ステープル等の打込み固定部材を用いて接合一体化された、木質系面材又はセメント系面材１６と、下層重量面材１７と、アスファルト系、ゴム系又は樹脂系弾性系面材１８と、上層重量面材１９とからなる。これらの部材が接合一化されていることで、板部材としての剛性が高められている。遮音積層板状体１４は、これらの部材を弾性力を有するシート材１３の上面に順次敷設した後に、接合一化することで形成できる他、予めこれらの部材を接合一体化しておいたものを、弾性力を有するシート材１３の上面に敷設することで形成することもできる。   As described above, the sound insulation laminated plate-like body 14 laid on the upper surface of the felt sheet material 13 is joined and integrated using an adhesive, an adhesive, or a driving and fixing member such as a screw, a nail, or a staple. It consists of a system face material or cement-type face material 16, a lower layer weight face material 17, an asphalt-based, rubber-based or resin-based elastic face material 18, and an upper layer weight face material 19. Since these members are joined together, the rigidity as a plate member is enhanced. The sound insulating laminated plate-like body 14 can be formed by sequentially laying these members on the upper surface of the sheet material 13 having elasticity, and then joining them together. It can also be formed by laying on the upper surface of the sheet material 13 having elasticity.

遮音積層板状体１４を形成する木質系面材又はセメント系面材１６は、例えば構造用合板として市販されている厚さが５〜２４ｍｍ程度の公知の各種の合板を用いることができる。本第１実施形態では、例えば厚さ１２ｍｍの針葉樹合板が好ましく用いられている。   As the wood-based face material or the cement-based face material 16 forming the sound insulating laminated plate-like body 14, for example, various known plywoods having a thickness of about 5 to 24 mm that are commercially available as structural plywoods can be used. In the first embodiment, for example, a softwood plywood having a thickness of 12 mm is preferably used.

下層重量面材１７及び上層重量面材１９は、建築用の石膏ボードとして市販されている厚さが９〜２１ｍｍ程度の公知の各種の石膏ボードを用いることができる。本第１実施形態では、各々、例えば厚さ１２．５ｍｍの硬質石膏ボードが好ましく用いられている。下層重量面材１７と上層重量面材１９とは、これらの目地の位置をずらして配置することが好ましい。   As the lower layer weight face material 17 and the upper layer weight face material 19, various known plaster boards having a thickness of about 9 to 21 mm which are commercially available as building gypsum boards can be used. In the first embodiment, for example, a hard gypsum board having a thickness of 12.5 mm is preferably used. It is preferable that the lower layer weight face material 17 and the upper layer weight face material 19 are disposed with their joint positions shifted.

下層重量面材１７と上層重量面材１９との間に挟みこまれるアスファルト系、ゴム系又は樹脂系弾性系面材１８は、例えばアスファルト系遮音材として知られる厚さが４〜１２ｍｍ程度の公知の各種のアスファルト系制振材を用いることができる。本第１実施形態では、例えば密度ρ＝２．３〜３．０の制振材をシート状に形成して得られた、厚さ８ｍｍ程度のアスファルト遮音シートが好ましく用いられている。アスファルト系、ゴム系又は樹脂系弾性系面材１８は、これの自重によって重量床衝撃音の低減に寄与する他、床下地材１２よりも床仕上材１５側に近接して配置されることで、軽量床衝撃音の低減に寄与することも可能になる。   The asphalt-based, rubber-based, or resin-based elastic face material 18 sandwiched between the lower layer weight face material 17 and the upper layer weight face material 19 has a known thickness of about 4 to 12 mm, which is known as an asphalt sound insulation material, for example. Various asphalt-based vibration damping materials can be used. In the first embodiment, for example, an asphalt sound insulating sheet having a thickness of about 8 mm obtained by forming a vibration damping material having a density ρ = 2.3 to 3.0 into a sheet shape is preferably used. The asphalt-based, rubber-based, or resin-based elastic surface material 18 contributes to the reduction of heavy floor impact sound due to its own weight, and is disposed closer to the floor finishing material 15 side than the floor base material 12. It is also possible to contribute to the reduction of lightweight floor impact sound.

遮音積層板状体１４の上面に敷設される床仕上材１５は、床用の仕上材として市販されている公知の各種の板状部材を用いることができ、本第１実施形態では、例えば厚さが１２ｍｍの木質のフロア材が用いられている。床仕上材１５は、通常の施工方法と同様にして、例えば接着剤やステープル等を用いて遮音積層板状体１４に固定される。   As the floor finishing material 15 laid on the upper surface of the sound insulating laminated plate-like body 14, various known plate-like members marketed as floor finishing materials can be used. In the first embodiment, for example, the thickness is A wood floor material with a length of 12 mm is used. The floor finish 15 is fixed to the sound insulation laminate 14 using, for example, an adhesive or a staple in the same manner as a normal construction method.

また、本第１実施形態では、上述のように、床支持部材１１ａ，１１ｂの下方に吊り天井２０が取り付けられており、この吊り天井２０の天井材２１の上方に積層されて、アスファルト系、ゴム系又は樹脂系弾性系面材２２と、１層以上（本第１実施形態で２層）の繊維系吸音材２３ａ，２３ｂとが設けられている。   Further, in the first embodiment, as described above, the suspended ceiling 20 is attached below the floor support members 11a and 11b, and is laminated above the ceiling material 21 of the suspended ceiling 20 to form an asphalt system. A rubber-based or resin-based elastic surface material 22 and one or more (two layers in the first embodiment) fiber-based sound absorbing materials 23a and 23b are provided.

本第１実施形態では、吊り天井２０は、床下地材１２の下方の天井空間に配置された吊木受部材２４から下方に延設する吊木部材２５によって支持された野縁２６の下面に、例えば床下地材１２との間に４３０ｍｍ程度の間隔をおいて、天井材２１を取り付けることによって形成されている。天井材２１の上方には、野縁２６の上面側に敷設されて、アスファルト系、ゴム系又は樹脂系弾性系面材２２と、２層の繊維系吸音材２３ａ，２３ｂとが積層されている。   In the first embodiment, the suspended ceiling 20 is formed on the lower surface of the field edge 26 supported by the suspended tree member 25 extending downward from the suspended tree receiving member 24 disposed in the ceiling space below the floor base material 12. For example, it is formed by attaching the ceiling material 21 with an interval of about 430 mm between the floor base material 12. Above the ceiling material 21, an asphalt-based, rubber-based, or resin-based elastic surface material 22 and two layers of fiber-based sound absorbing materials 23 a and 23 b are laminated on the upper surface side of the field edge 26. .

天井材２１は、天井用の下地材或いは仕上材として市販されている公知の各種の板状部材を用いることができる。本第１実施形態では、例えば厚さが１２．５ｍｍの強化石膏ボードが用いられている。天井材２１は、通常の施工方法と同様にして、例えば接着剤やステープル等を用いて野縁２６に固定される。   The ceiling member 21 may be any of various known plate-like members that are commercially available as a ceiling base material or finishing material. In the first embodiment, for example, a reinforced gypsum board having a thickness of 12.5 mm is used. The ceiling material 21 is fixed to the field edge 26 using, for example, an adhesive or a staple in the same manner as a normal construction method.

野縁２６の上面側に敷き込まれるアスファルト系、ゴム系又は樹脂系弾性系面材２２は、遮音積層板状体１４を形成する上述のアスファルト系、ゴム系又は樹脂系弾性系面材１８と同様に、例えばアスファルト系遮音材として知られる厚さが２〜１２ｍｍ程度の公知の各種のアスファルト系制振材を用いることができる。本第１実施形態では、例えば密度ρ＝２．３〜３．０の制振材をシート状に形成して得られた、厚さ４ｍｍ程度のアスファルト遮音シートが好ましく用いられている。   The asphalt-based, rubber-based, or resin-based elastic face material 22 laid on the upper surface side of the field edge 26 is the same as the above-described asphalt-based, rubber-based, or resin-based elastic face material 18 that forms the sound insulating laminated plate 14 Similarly, various known asphalt vibration damping materials having a thickness of about 2 to 12 mm, which are known as asphalt sound insulation materials, can be used. In the first embodiment, for example, an asphalt sound insulating sheet having a thickness of about 4 mm obtained by forming a vibration damping material having a density ρ = 2.3 to 3.0 in a sheet shape is preferably used.

アスファルト系制振材２２の上面に敷設される１層以上の繊維系吸音材２３ａ，２３ｂは、建築用の吸音材として市販されている公知の各種のグラスウール又はロックウールを用いることができる。１層以上の繊維系吸音材２３ａ，２３ｂは、合計の厚さが５０〜２００ｍｍのとなるようにすることが好ましい。本第１実施形態では、２層の繊維系吸音材２３ａ，２３ｂとして、各々、例えば厚さ５０ｍｍのグラスウールが好ましく用いられている。   As the one or more layers of the sound absorbers 23a and 23b laid on the top surface of the asphalt vibration damping material 22, various known glass wool or rock wool commercially available as sound absorbing materials for construction can be used. It is preferable that the fiber-type sound absorbing materials 23a and 23b having one or more layers have a total thickness of 50 to 200 mm. In the first embodiment, glass wool having a thickness of 50 mm, for example, is preferably used as the two-layer fiber-based sound absorbing materials 23a and 23b.

天井材２１の上方にアスファルト系制振材２２が敷設されていることにより、天井内空間の音圧変動を原因として発生する天井材２１の振動エネルギーを効果的に低減することが可能になる。また、天井材２１の上方に１層以上の繊維系吸音材２３ａ，２３ｂが合計の厚さが５０〜２００ｍｍとなるように敷設されていることにより、天井内空間で発生する音圧変動のピークを効果的に低減することが可能になる。特に、厚さ５０ｍｍのグラスウールによる繊維系吸音材２３ａ，２３ｂが２層敷設されていることにより、６３Ｈzのオクターブバンド帯域（４４〜８８Ｈz）における音圧変動のピークを効果的に低減することがが可能になる。   By laying the asphalt vibration damping material 22 above the ceiling material 21, it is possible to effectively reduce the vibration energy of the ceiling material 21 generated due to the sound pressure fluctuation in the space in the ceiling. Further, since one or more layers of the fiber-based sound absorbing materials 23a and 23b are laid above the ceiling material 21 so as to have a total thickness of 50 to 200 mm, the peak of the sound pressure fluctuation generated in the space in the ceiling. Can be effectively reduced. In particular, it is possible to effectively reduce the peak of the sound pressure fluctuation in the 63 Hz octave band (44 to 88 Hz) by laying two layers of fiber-based sound absorbing materials 23 a and 23 b made of glass wool having a thickness of 50 mm. It becomes possible.

そして、上述の構成を備える本第１実施形態の遮音床構造１０によれば、遮音性能の高い仕様の床構造を、主として市販の材料を組み合わせて、簡易に且つコンパクトに形成することが可能になる。   And according to the sound insulation floor structure 10 of this 1st Embodiment provided with the above-mentioned structure, it becomes possible to form the floor structure of a specification with high sound insulation performance easily and compactly, mainly combining commercially available materials. Become.

すなわち、本第１実施形態によれば、遮音床構造１０は、床下地材１２と、床下地材１２の上面に敷設された弾性力を有するシート材１３と、弾性力を有するシート材１３の上面に敷設された遮音積層板状体１４と、遮音積層板状体１４の上面に敷設された床仕上材１５とを含んで構成され、遮音積層板状体１４は、木質系面材又はセメント系面材１６と、下層重量面材１７と、アスファルト系、ゴム系又は樹脂系弾性系面材１８と、上層重量面材１９とを接合一体化して形成されており、遮音積層板状体１４と床下地材１２との間に弾性力を有するシート材１３が介在することで、一種の浮き床構造となっているので、市販の構造用合板や石膏ボードを用いて、特に厚さの大きな特別仕様の部材を用いることなく、安価に且つコンパクトに形成することが可能になる。   That is, according to the first embodiment, the sound insulating floor structure 10 includes a floor base material 12, an elastic sheet material 13 laid on the upper surface of the floor base material 12, and an elastic sheet material 13. The sound insulation laminate plate 14 laid on the top surface and the floor finishing material 15 laid on the top surface of the sound insulation laminate plate 14, the sound insulation laminate plate 14 is made of a wood-based face material or cement. The system face material 16, the lower layer weight face material 17, the asphalt, rubber or resin type elastic face material 18, and the upper layer weight face material 19 are joined and integrated. Since the sheet material 13 having elasticity is interposed between the floor base material 12 and the floor base material 12, a kind of floating floor structure is formed. Inexpensive and compact without using specially-designed components It is possible to formed.

また、遮音積層板状体１４の下層重量面材１７と上層重量面材１９との間に挟みこまれたアスファルト系、ゴム系又は樹脂系弾性系面材１８による、例えば６３〜８１Ｈzオクターブバンド帯域といった広帯域における振動エネルギーを効果的に低減するという作用や、床下地材１２との間に弾性力を有するシート材１３を一体化することなく介在させることで、遮音積層板状体１４が床下地材１２から絶縁した一種の浮き床構造となっていることによる、例えば６３〜８１Ｈzオクターブバンド帯域といった広帯域における伝播エネルギーを効果的に低減するという作用によって、本第１実施形態の遮音床構造１０は、ＪＩＳ Ａ １４１８−２：２０００による重量床衝撃音性能がＬＨ−６０、ＪＩＳ Ａ １４１８−１：２０００による軽量床衝撃音性能がＬＬ−５５、ＪＩＳ Ａ １４１７による室内音圧レベル差性能（遮音性能）がＤ−５０といった高い遮音性能と同様の、これに近似する高い遮音性能を、効果的に発揮することが可能になる。 Further, for example, a 63 to 81 Hz octave band band by an asphalt-based, rubber-based, or resin-based elastic surface material 18 sandwiched between the lower layer weight surface material 17 and the upper layer weight surface material 19 of the sound insulation laminated plate-like body 14. By effectively interposing the sheet material 13 having elasticity with the floor base material 12 without integrating the action of effectively reducing vibration energy in a wide band such as The sound-insulating floor structure 10 of the first embodiment is effectively reduced in the propagation energy in a wide band such as the 63 to 81 Hz octave band band by being a kind of floating floor structure insulated from the material 12. , JIS A 1418-2: 2000 heavy floor impact sound performance is LH-60, JIS A 1418-1: 2000 lightweight floor撃音performance LL-55, JIS A room sound pressure level difference performance with 1417 (sound insulation) is similar to the high sound insulation such as D-50, a high sound insulation performance approximating thereto, to be effectively exhibited It becomes possible.

さらに、本第１実施形態によれば、弾性力を有するシート材１３は、床下地材１２の上面に敷設されていて、遮音積層板状体１４を挟んで床仕上材１５から離れた下層部分に設けられているので、例えば床仕上材１５の上を歩行する居住者が、弾性力を有するシート材１３が介在していることで床面が局所的に沈むようなふかふか感を感じることになるのを、効果的に回避することが可能になる。   Furthermore, according to the first embodiment, the sheet material 13 having elasticity is laid on the upper surface of the floor base material 12, and is a lower layer portion separated from the floor finishing material 15 with the sound insulating laminated plate 14 interposed therebetween. For example, a resident who walks on the floor finishing material 15 feels a soft feeling that the floor surface sinks locally due to the presence of the elastic sheet material 13. This can be effectively avoided.

図３及び図４は、本発明の好ましい第２実施形態に係る遮音床構造１０’を説明するものである。本第２実施形態の遮音床構造１０’は、遮音積層板状体１４’の構成が異なる他は、上記第１実施形態の遮音床構造１０と同様の構成を備えている。ここで、本第２実施形態の遮音床構造１０’における、上記第１実施形態の遮音床構造１０と共通する部分については、共通する符号を付して、その詳細な説明は省略する。   3 and 4 illustrate a sound insulating floor structure 10 'according to a second preferred embodiment of the present invention. The sound insulation floor structure 10 ′ of the second embodiment has the same structure as the sound insulation floor structure 10 of the first embodiment except that the structure of the sound insulation laminate plate-like body 14 ′ is different. Here, in the sound insulation floor structure 10 ′ of the second embodiment, portions common to the sound insulation floor structure 10 of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

そして、本第２実施形態の遮音床構造１０’は、木造建築物において、上階３０と下階３１との間の床部に設けられる床構造であって、図３及び図４に示すように、床支持部材１１ａ，１１ｂによって支持されて、この床支持部材１１ａ，１１ｂの上面に敷設された床下地材１２と、この床下地材１２の上面に敷設された弾性力を有するシート材１３と、この弾性力を有するシート材１３の上面に敷設された遮音積層板状体１４’と、この遮音積層板状体１４’の上面に敷設された床仕上材１５とを含んで構成され、遮音積層板状体１４’は、下層重量面材１７と、アスファルト系、ゴム系又は樹脂系弾性系面材１８’と、上層重量面材１９とを、これらの順番で積層すると共に、接着剤、粘着剤、又はビス、釘、ステープル等の打込み固定部材（図示せず）を用いて接合一体化して形成されており、遮音積層板状体１４’と床下地材１２との間に弾性力を有するシート材１３が介在することで、浮き床構造となっている。   And the sound insulation floor structure 10 'of this 2nd Embodiment is a floor structure provided in the floor part between the upper floor 30 and the lower floor 31 in wooden structures, Comprising: As shown in FIG.3 and FIG.4. The floor base material 12 supported by the floor support members 11a and 11b and laid on the upper surface of the floor support members 11a and 11b, and the sheet material 13 having elastic force laid on the upper surface of the floor base material 12 And a sound insulation laminated plate 14 'laid on the upper surface of the elastic sheet material 13 and a floor finishing material 15 laid on the upper surface of the sound insulation laminate 14'. The sound insulation laminated plate-like body 14 ′ is formed by laminating a lower layer weight surface material 17, an asphalt-based, rubber-based or resin-based elastic surface material 18 ′, and an upper layer weight surface material 19 in this order, and an adhesive. , Adhesive, or screwing, fixing of screws, nails, staples, etc. Floating floor structure is formed by joining and integrating using a material (not shown), and the sheet material 13 having elasticity is interposed between the sound insulation laminated plate-like body 14 ′ and the floor base material 12. It has become.

すなわち、本第２実施形態の遮音床構造１０’では、遮音積層板状体１４’は、上記第１実施形態の遮音積層板状体１４で使用した木質系面材又はセメント系面材１６を用いることなく、これに代えて、下層重量面材１７と上層重量面材１９との間に挟みこまれるアスファルト系、ゴム系又は樹脂系弾性系面材１８’の厚さを、上記第１実施形態のアスファルト系、ゴム系又は樹脂系弾性系面材１８の厚さよりも大きくして形成されている。より具体的には、例えば弾性力を有するシート材１３が厚さ１〜１０ｍｍ（本第２実施形態では４ｍｍ）のフェルトシート材からなり、下層重量面材が厚さ９〜２１ｍｍ（本第２実施形態では１２．５ｍｍ）の石膏ボードからなり、アスファルト系、ゴム系又は樹脂系弾性系面材１８’が厚さ６〜２０ｍｍ（本第２実施形態では１２ｍｍ）のアスファルト系制振材からなり、上層重量面材１９が厚さ９〜２１ｍｍ（本第２実施形態では１２．５ｍｍ）の石膏ボードからなっている。   That is, in the sound insulation floor structure 10 ′ of the second embodiment, the sound insulation laminated plate-like body 14 ′ is made of the wood-based face material or the cement-type face material 16 used in the sound insulation laminated plate-like body 14 of the first embodiment. Instead of this, the thickness of the asphalt-based, rubber-based, or resin-based elastic surface material 18 ′ sandwiched between the lower layer weight surface material 17 and the upper layer weight surface material 19 is changed to the first embodiment. The asphalt-based, rubber-based, or resin-based elastic face material 18 is formed to be larger than the thickness. More specifically, for example, the sheet material 13 having elasticity is made of a felt sheet material having a thickness of 1 to 10 mm (4 mm in the second embodiment), and the lower layer weight face material is 9 to 21 mm (the second material). In the embodiment, it is made of 12.5 mm) gypsum board, and the asphalt-based, rubber-based or resin-based elastic face material 18 ′ is made of asphalt-based vibration damping material having a thickness of 6 to 20 mm (12 mm in the second embodiment). The upper-layer weight face material 19 is made of a gypsum board having a thickness of 9 to 21 mm (12.5 mm in the second embodiment).

本第２実施形態の遮音床構造１０’によっても、上記第１実施形態の遮音床構造１０と同様の作用効果が奏されることに加えて、木質系面材又はセメント系面材１６を用いていないことで遮音積層板状体１４’の厚さを薄くして、遮音積層板状体１４’や遮音床構造１０’をよりコンパクトに形成することが可能になる。   The sound insulation floor structure 10 ′ of the second embodiment also has the same effects as the sound insulation floor structure 10 of the first embodiment, and uses a wood-based face material or a cement-based face material 16. Therefore, it is possible to reduce the thickness of the sound insulating laminated plate-like body 14 ′ and form the sound insulating laminated plate-like body 14 ′ and the sound insulating floor structure 10 ′ more compactly.

なお、本発明は上記各実施形態に限定されることなく種々の変更が可能である。例えば、床支持部材の下方に吊り天井が取り付けられている必要は必ずしもなく、また吊り天井の天上材の上方に積層されて、アスファルト系制振材と、２層のグラスウールとが設けられている必要は必ずしもない。アスファルト系制振材のみが天上材の上方に設けられていても良く、グラスウールが１層のみ設けられていても良い。   The present invention is not limited to the above-described embodiments, and various modifications can be made. For example, it is not always necessary to attach a suspended ceiling below the floor support member, and an asphalt vibration damping material and two layers of glass wool are provided on the ceiling ceiling. There is no necessity. Only the asphalt damping material may be provided above the ceiling material, or only one layer of glass wool may be provided.

また、本発明の遮音床構造は、床梁等の床支持部材に支持させて敷設された床下地材との間に弾性力を有するシート材を介在させて遮音積層板状体が設けられていることによって、高い遮音性能が得られるようになっているので、床支持部材の下方に吊り天井が取り付けられていない、例えば下階から床梁が見える梁表しの天上による上階と下階との間の床構造においても、有効に採用することができる。   Further, the sound insulation floor structure of the present invention is provided with a sound insulation laminated plate-like body with a sheet material having an elastic force interposed between a floor base material laid and supported by a floor support member such as a floor beam. Since a high sound insulation performance can be obtained, there is no suspended ceiling attached below the floor support member, for example, the upper floor and the lower floor by the top of the beam representing the floor beam from the lower floor Even in the floor structure between, it can be effectively employed.

以下、実施例により、本発明の遮音床構造についてさらに詳細に説明するが、本発明はこれらに限定されるものではない。   Hereinafter, although the sound insulation floor structure of this invention is demonstrated in detail by an Example, this invention is not limited to these.

図１及び図２に示す上記第１実施形態の遮音床構造１０と同様の構成を備える遮音構造を実施例１の遮音構造とした。図３及び図４に示す上記第２実施形態の遮音床構造１０’と同様の構成を備える遮音構造を実施例２の遮音構造とした。実施例１の遮音構造と実施例２の遮音構造に対し、ＪＩＳ １４１８に従って、重量床衝撃音性能及び軽量床衝撃音性能について実験すると共に、ＪＩＳ １４１７（建築物の空気音遮断性能の測定方法）に従って、上階の空間と下階に空間との間の室内音圧レベル差性能（遮音性能）についてを実験した。実験結果を図５〜図８に示す。なお、音源室は上階の８畳間、受音室は下階の８畳間とした。   The sound insulation structure having the same configuration as the sound insulation floor structure 10 of the first embodiment shown in FIGS. The sound insulation structure having the same configuration as the sound insulation floor structure 10 ′ of the second embodiment shown in FIGS. 3 and 4 is the sound insulation structure of Example 2. The sound insulation structure of Example 1 and the sound insulation structure of Example 2 were tested according to JIS 1418 for heavy floor impact sound performance and lightweight floor impact sound performance, and JIS 1417 (measurement method for air sound insulation performance of buildings). According to the experiment, the room sound pressure level difference performance (sound insulation performance) between the space on the upper floor and the space on the lower floor was tested. Experimental results are shown in FIGS. Note that the sound source room was located between 8 tatami mats on the upper floor, and the sound receiving room was located between 8 tatami mats on the lower floor.

図５〜図８に示す実験結果によれば、本発明に係る実施例１の遮音構造及び実施例２の遮音構造は、いずれも、ＪＩＳ Ａ １４１８−２：２０００による重量床衝撃音性能がＬＨ−６０、ＪＩＳ Ａ １４１８−１：２０００による軽量床衝撃音性能がＬＬ−５５、ＪＩＳ Ａ １４１７による室内音圧レベル差性能（遮音性能）がＤ−５０といった、高い遮音性能と同様の、これに近似する高い遮音性能を備えていることが判明する。 According to the experimental results shown in FIGS. 5 to 8, the sound insulation structure of Example 1 and the sound insulation structure of Example 2 according to the present invention both have a heavy floor impact sound performance according to JIS A 1418-2: 2000 of LH. -60, JIS A 1418-1: 2000 light floor impact sound performance is LL-55, JIS A 1417 indoor sound pressure level difference performance (sound insulation performance) is similar to high sound insulation performance , such as D-50. It turns out that it has high sound insulation performance that is close .

１０，１０’ 遮音床構造
１１ａ 床梁（床支持部材）
１１ｂ 床根太（床支持部材）
１２ 床下地材
１３ 弾性力を有するシート材
１４，１４’ 遮音積層板状体
１５ 床仕上材
１６ 木質系面材又はセメント系面材
１７ 下層重量面材
１８，１８’ アスファルト系、ゴム系又は樹脂系弾性系面材
１９ 上層重量面材
２０ 吊り天井
２１ 天井材
２２ アスファルト系、ゴム系又は樹脂系弾性系面材
２３ａ 側面接合金物
２３ｂ，２３ｂ １層以上の繊維系吸音材
２４ 吊木受部材
２５ 吊木部材
２６ 野縁
３０ 上階
３１ 下階 10, 10 'sound insulation floor structure 11a floor beam (floor support member)
11b Floor joist (floor support member)
12 Floor base material 13 Elastic sheet material 14, 14 'Sound insulation laminated plate 15 Floor finishing material 16 Wood surface material or cement surface material 17 Lower layer weight surface material 18, 18' Asphalt, rubber or resin System-based elastic face material 19 Upper-layer weight face material 20 Suspended ceiling 21 Ceiling material 22 Asphalt-based, rubber-based or resin-based elastic surface material 23a Side joint hardware 23b, 23b One or more layers of fiber-based sound absorbing material 24 Suspended tree receiving member 25 Hanging wood member 26 Field edge 30 Upper floor 31 Lower floor

Claims (4)

木造住宅建築物において、上階と下階との間の床部に設けられる遮音床構造であって、
床支持部材によって支持されて、該床支持部材の上面に敷設された床下地材と、該床下地材の上面に敷設された厚さ１〜１０ｍｍのフェルトシート材と、該フェルトシート材の上面に敷設された遮音積層板状体と、該遮音積層板状体の上面に敷設された床仕上材とを含んで構成され、
前記遮音積層板状体は、厚さ５〜２４ｍｍの合板と、厚さ９〜２１ｍｍの石膏ボードと、厚さ４〜１２ｍｍのアスファルト系制振材と、厚さ９〜２１ｍｍの石膏ボードとを、これらの順番で積層すると共に、接着剤、粘着剤、又はビス、釘、ステープル等の打込み固定部材を用いて接合一体化して形成されており、
前記遮音積層板状体と前記床下地材との間に前記フェルトシート材が介在することで、浮き床構造となっている遮音床構造。 In a wooden house building, a sound insulation floor structure provided on the floor between the upper floor and the lower floor,
Is supported by the floor support members, the underfloor member laid on the upper surface of the floor supporting member, and the felt sheet with a thickness of 1~10mm laid on the upper surface of the floor base member, the upper surface of the felt sheet material A sound insulation laminate plate laid on the floor, and a floor covering material laid on the top surface of the sound insulation laminate plate,
The sound insulation laminated plate-like body comprises a plywood having a thickness of 5 to 24 mm, a gypsum board having a thickness of 9 to 21 mm, an asphalt vibration damping material having a thickness of 4 to 12 mm, and a gypsum board having a thickness of 9 to 21 mm. In addition to being laminated in these order, it is formed by joining and integrating using an adhesive, an adhesive, or a driving and fixing member such as a screw, nail, staple,
A sound insulation floor structure having a floating floor structure by interposing the felt sheet material between the sound insulation laminate plate and the floor base material. 木造住宅建築物において、上階と下階との間の床部に設けられる遮音床構造であって、
床支持部材によって支持されて、該床支持部材の上面に敷設された床下地材と、該床下地材の上面に敷設された厚さ１〜１０ｍｍのフェルトシート材と、該フェルトシート材の上面に敷設された遮音積層板状体と、該遮音積層板状体の上面に敷設された床仕上材とを含んで構成され、
前記遮音積層板状体は、厚さ９〜２１ｍｍの石膏ボードと、厚さ６〜２０ｍｍのアスファルト系制振材と、厚さ９〜２１ｍｍの石膏ボードとを、これらの順番で積層すると共に、接着剤、粘着剤、又はビス、釘、ステープル等の打込み固定部材を用いて接合一体化して形成されており、
前記遮音積層板状体と前記床下地材との間に前記フェルトシート材が介在することで、浮き床構造となっている遮音床構造。 In a wooden house building, a sound insulation floor structure provided on the floor between the upper floor and the lower floor,
Is supported by the floor support members, the underfloor member laid on the upper surface of the floor supporting member, and the felt sheet with a thickness of 1~10mm laid on the upper surface of the floor base member, the upper surface of the felt sheet material A sound insulation laminate plate laid on the floor, and a floor covering material laid on the top surface of the sound insulation laminate plate,
The sound insulation laminate plate is laminated with a 9 to 21 mm thick gypsum board , a 6 to 20 mm thick asphalt vibration damping material, and a 9 to 21 mm thick gypsum board in this order, It is formed by bonding and bonding using adhesives, adhesives, or driving and fixing members such as screws, nails, staples, etc.
A sound insulation floor structure having a floating floor structure by interposing the felt sheet material between the sound insulation laminate plate and the floor base material. 前記床支持部材の下方に吊り天井が取り付けられており、該吊り天井の天井材の上方に積層されて、アスファルト系、ゴム系又は樹脂系弾性系面材と、１層以上の繊維系吸音材とが設けられている請求項１又は２項記載の遮音床構造。 A suspended ceiling is attached below the floor support member, and is laminated above the ceiling material of the suspended ceiling to form an asphalt-based, rubber-based or resin-based elastic surface material, and one or more layers of a fiber-based sound absorbing material. The sound-insulating floor structure according to claim 1 or 2, wherein 前記天井材が厚さ９〜２１ｍｍの石膏ボードからなり、前記アスファルト系、ゴム系又は樹脂系弾性系面材が厚さ２〜１２ｍｍのアスファルト系制振材からなり、前記１層以上の繊維系吸音材が合計の厚さが５０〜２００ｍｍのグラスウール又はロックウールからなる請求項３記載の遮音床構造。 The ceiling material is composed of a gypsum board having a thickness of 9 to 21 mm, the asphalt-based, rubber-based, or resin-based elastic surface material is composed of an asphalt-based vibration damping material having a thickness of 2 to 12 mm, and the fiber system having one or more layers. The sound insulating floor structure according to claim 3, wherein the sound absorbing material is made of glass wool or rock wool having a total thickness of 50 to 200 mm.
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