JP2008095397A - Floor structure - Google Patents

Floor structure Download PDF

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JP2008095397A
JP2008095397A JP2006278901A JP2006278901A JP2008095397A JP 2008095397 A JP2008095397 A JP 2008095397A JP 2006278901 A JP2006278901 A JP 2006278901A JP 2006278901 A JP2006278901 A JP 2006278901A JP 2008095397 A JP2008095397 A JP 2008095397A
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floor
floor structure
vibration
dynamic vibration
vibration absorber
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Satoru Akutsu
悟 阿久津
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Bridgestone Corp
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Bridgestone Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a floor structure superior in blocking performance of a floor impulsive sound, and capable of improving workability. <P>SOLUTION: Vibration of a sleeper 11 is transmitted to a dynamic vibration reducer via a beam receiving member 24, a support bolt 22 and an intermediate receiving member 20, and the vibration from the sleeper 11 is damped. Since the damped vibration is transmitted to a floor slab 12 by being further damped by cushion rubber 18, the floor impulsive sound is excellently blocked. The workability is improved since there is no need to conventionally arrange a vibration control material or a sound insulating material on the whole floor surface in construction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、集合住宅、戸建住宅等の建物に用いられ、支持部材を介して二重床とされた床構造に関する。   The present invention relates to a floor structure that is used in a building such as an apartment house or a detached house and has a double floor via a support member.

床構造においては、床衝撃音の遮断性能を向上させるために、支持部材を介して床基盤上から所定の高さに床を設ける二重床構造とする場合がある。このような二重床構造として、例えば、特許文献１に記載の制振二重床構造が知られている。
この制振二重床構造では、建物床スラブ上に複数の二重床支柱を立設し、該二重床支柱群上端間に亙り架け渡すように床パネルを載置敷詰める構造の二重床であって、該二重床支柱に上下方向にバネ特性を有する弾性体を介して付加質量を取付けている。
特許第３０９２０９７号 In the floor structure, there is a case where a double floor structure is provided in which a floor is provided at a predetermined height from the floor base via a support member in order to improve the performance of blocking floor impact sound. As such a double floor structure, for example, a damping double floor structure described in Patent Document 1 is known.
In this vibration-damping double floor structure, a double floor having a structure in which a plurality of double floor struts are erected on a building floor slab and floor panels are placed and laid so as to span between the upper ends of the double floor strut groups. The additional mass is attached to the double floor support through an elastic body having spring characteristics in the vertical direction.
Patent No. 3092097

しかしながら、この制振二重床構造では、付加質量が床に連結されており、この方法では減衰効果が十分に得られず、床衝撃音の遮断性能に優れた床構造が求められていた。
本発明は、上記事実を考慮して、床衝撃音の遮断性能が良好な床構造を提供することを課題とする。 However, in this vibration-damping double floor structure, the additional mass is connected to the floor, and this method does not provide a sufficient damping effect, and a floor structure excellent in floor impact sound blocking performance has been demanded.
In view of the above fact, an object of the present invention is to provide a floor structure having a good floor impact sound blocking performance.

請求項１に記載の床構造は、床スラブと、前記床スラブ上に支持され、弾性変形可能であって振動を減衰させる第１弾性部材と、前記第１弾性部材上に支持され、前記床スラブと反対方向へ延びる支持部材と、前記支持部材上に支持され、前記床スラブとの間に間隔をもって配置されるビーム材と、前記ビーム材に取り付けられる床材と、前記支持部材に支持されて弾性変形可能な第２弾性部材、及び前記第２弾性部材に支持される質量体を含んで構成される動吸振器と、を有することを特徴としている。   The floor structure according to claim 1 is a floor slab, a first elastic member supported on the floor slab, elastically deformable and dampening vibration, supported on the first elastic member, and the floor. A support member extending in a direction opposite to the slab, a beam member supported on the support member and spaced from the floor slab, a floor member attached to the beam member, and supported by the support member. A second elastic member that is elastically deformable, and a dynamic vibration absorber that includes a mass body supported by the second elastic member.

請求項１に記載の床構造によれば、ビーム材に振動が加わった場合、この振動は、支持部材を介して動吸振器の第２弾性部材へ伝わる。これによって、第２弾性部材が弾性変形して質量体が振動を吸収するように振動することで、ビーム材から床スラブへの振動を減衰する。減衰された振動は、さらに第１弾性部材によって減衰されて床スラブへ伝わるので、床衝撃音が良好に遮断される。
ここで、請求項１に記載の床構造によれば、剛性の大きなビーム材が床材を支持するので、床材を支持部材で直接支持する従来構造対比で支持部材の支持ピッチを大きくすることができ、従来構成対比で床衝撃音の伝達（入力）箇所を少なくでき、衝撃力が分散されることにより、従来構成よりも遮音性能を向上できる。また、従来構成対比で動吸振器の設置箇所が少なくて済み、低コストで床構造を提供できる。 According to the floor structure of the first aspect, when vibration is applied to the beam material, the vibration is transmitted to the second elastic member of the dynamic vibration absorber via the support member. As a result, the second elastic member is elastically deformed and vibrates so that the mass body absorbs vibration, thereby attenuating vibration from the beam material to the floor slab. The damped vibration is further damped by the first elastic member and transmitted to the floor slab, so that the floor impact sound is well cut off.
Here, according to the floor structure of the first aspect, since the beam material having high rigidity supports the floor material, the support pitch of the support member is increased as compared with the conventional structure in which the floor material is directly supported by the support member. As compared with the conventional configuration, the number of floor impact sound transmission (input) locations can be reduced, and the impact force is dispersed, so that the sound insulation performance can be improved as compared with the conventional configuration. Further, the number of installation locations of the dynamic vibration absorber is small compared to the conventional configuration, and the floor structure can be provided at low cost.

請求項２に記載の発明は、請求項１記載の床構造において、前記床スラブがコンクリート製であることを特徴としている。   The invention according to claim 2 is the floor structure according to claim 1, wherein the floor slab is made of concrete.

請求項２に記載の床構造によれば、ビーム材の振動は、動吸振器、及び第１弾性部材によって減衰された後にコンクリート製の床スラブへ伝わる。   According to the floor structure of the second aspect, the vibration of the beam material is transmitted to the concrete floor slab after being attenuated by the dynamic vibration absorber and the first elastic member.

請求項３に記載の発明は、請求項１または請求項２に記載の床構造において、前記支持部材に一体化して設けられて受け面を備えた中間受け部を有し、前記受け面に前記第２弾性部材が配置されている、ことを特徴としている。   According to a third aspect of the present invention, in the floor structure according to the first or second aspect, the floor structure includes an intermediate receiving portion provided integrally with the support member and having a receiving surface, and the receiving surface includes the intermediate receiving portion. The second elastic member is arranged.

請求項３に記載の床構造によれば、ビーム材の振動は、中間受け部を介して第２弾性部材及び質量体へ伝えられて減衰させられる。施工時には、第２弾性部材を中間受け部の受け面に配置することになるので、施工性が向上する。   According to the floor structure of the third aspect, the vibration of the beam material is transmitted to the second elastic member and the mass body through the intermediate receiving portion and is attenuated. At the time of construction, since the second elastic member is disposed on the receiving surface of the intermediate receiving portion, the workability is improved.

請求項４に記載の発明は、請求項１乃至請求項３の何れか１項に記載の床構造において、前記第２弾性部材及び前記質量体の中央に挿入孔が形成され、前記挿入孔に前記支持部材が挿入されている、ことを特徴としている。   According to a fourth aspect of the present invention, in the floor structure according to any one of the first to third aspects, an insertion hole is formed in the center of the second elastic member and the mass body. The support member is inserted.

請求項４に記載の床構造によれば、第２弾性部材及び質量体の中央に形成された挿入孔に支持部材を挿入した構成としているので、質量体、及び第２弾性部材の重心位置に支持部材が配置されることになり、支持部材に対して質量体、及び第２弾性部材を安定した状態で保持することができる。   According to the floor structure of the fourth aspect, since the support member is inserted into the insertion hole formed in the center of the second elastic member and the mass body, the center of gravity of the mass body and the second elastic member is located. A support member will be arrange | positioned and a mass body and a 2nd elastic member can be hold | maintained with respect to the support member in the stable state.

請求項５に記載の発明は、請求項１乃至請求項４の何れか１項に記載の床構造において、前記第２弾性部材は、前記支持部材、及び前記質量体に固着されている、ことを特徴としている。   According to a fifth aspect of the present invention, in the floor structure according to any one of the first to fourth aspects, the second elastic member is fixed to the support member and the mass body. It is characterized by.

請求項５に記載の床構造によれば、質量体が振動により第２弾性部材から浮くような不用意な動きが抑えられ、質量体の動きを振動周期に追従させ易くなるので、動吸振効果を高めることが出来る。   According to the floor structure of the fifth aspect, since the inadvertent movement of the mass body floating from the second elastic member due to vibration is suppressed, and the movement of the mass body can easily follow the vibration cycle, the dynamic vibration absorption effect Can be increased.

請求項６に記載の発明は、請求項１乃至請求項５の何れか１項に記載の床構造において、前記質量体が前記第２弾性部材を介して複数の前記支持部材に支持されている、ことを特徴としている。   According to a sixth aspect of the present invention, in the floor structure according to any one of the first to fifth aspects, the mass body is supported by the plurality of support members via the second elastic member. It is characterized by that.

請求項６に記載の床構造によれば、複数の支持部材に対して同時に質量体が作用するので、振動を分散して吸収しやすくなる。また、複数の支持部材の各々に質量体を設ける構成に対して、質量体の数を減らすことができる。   According to the floor structure of the sixth aspect, since the mass body acts simultaneously on the plurality of support members, vibrations are easily dispersed and absorbed. Moreover, the number of mass bodies can be reduced with respect to the structure which provides a mass body in each of several support members.

請求項７に記載の発明は、請求項１乃至請求項６の何れか１項に記載の床構造において、前記動吸振器を支持した前記支持部材は、前記床スラブにおける振動の発生しやすいスラブ特定領域の上方、又は、前記床材における振動の発生しやすい床特定領域の下方、における範囲内にのみ設けられる、ことを特徴としている。   A seventh aspect of the present invention is the floor structure according to any one of the first to sixth aspects, wherein the support member that supports the dynamic vibration absorber is a slab in which vibration is easily generated in the floor slab. It is characterized by being provided only in a range above the specific region or below the specific floor region where vibration is likely to occur in the flooring.

請求項７に記載の床構造によれば、動吸振器が、床スラブにおける振動の発生しやすいスラブ特定領域の上方、又は、前記床材における振動の発生しやすい床特定領域の下方、における範囲内にのみ設けられることで、振動を有効に減衰して衝撃音を低減するので、床衝撃音の遮断性能を良好とすることが可能となる。また、特定領域以外の領域では、動吸振器を設けない支持部材でビーム材を支持すれば良いので、コストを抑えることができる。   According to the floor structure according to claim 7, the range of the dynamic vibration absorber is above the slab specific area where vibration is likely to occur in the floor slab, or below the floor specific area where vibration is likely to occur in the floor material. By being provided only inside, the vibration is effectively attenuated and the impact sound is reduced, so that the floor impact sound blocking performance can be improved. Further, in a region other than the specific region, it is only necessary to support the beam material with a support member that does not include a dynamic vibration absorber, so that the cost can be suppressed.

請求項８に記載の発明は、請求項１乃至請求項７の何れか１項に記載の床構造において、大振幅の振動が生じうる第１の配置位置に配置された前記支持部材に支持される前記動吸振器は、前記第１の配置よりも振動の振幅が小さい第２の配置位置に配置された前記支持部材に支持される前記動吸振器よりも振動減衰力が大きく設定されている、ことを特徴としている。   The invention according to claim 8 is supported by the support member arranged at the first arrangement position in which a large amplitude vibration can occur in the floor structure according to any one of claims 1 to 7. The dynamic vibration absorber is set to have a vibration damping force larger than that of the dynamic vibration absorber supported by the support member arranged at the second arrangement position where the amplitude of vibration is smaller than that of the first arrangement. It is characterized by that.

請求項８に記載の床構造によれば、大振幅の振動が生じうる第１の配置位置に配置された支持部材に支持される動吸振器は大きな振動減衰力を備え、第１の配置よりも振動の振幅が小さい第２の配置位置に配置された支持部材に支持される動吸振器は、第１の配置位置に配置された支持部材に支持される動吸振器に比べて小さな振動減衰力を備えているので、ビーム材に大振幅の振動が生じた場合にも、床衝撃音が良好に遮断される。   According to the floor structure of the eighth aspect, the dynamic vibration absorber supported by the support member arranged at the first arrangement position where large-amplitude vibration can occur has a large vibration damping force. The dynamic vibration absorber supported by the support member arranged at the second arrangement position where the amplitude of vibration is small is smaller than that of the dynamic vibration absorber supported by the support member arranged at the first arrangement position. Since the force is provided, the floor impact sound is well cut off even when a large amplitude vibration occurs in the beam material.

請求項９に記載の発明は、請求項８に記載の床構造において、前記第１の配置位置は、前記床材の上方が区画されていない場合には前記床スラブの中央域の上方、前記床材の上方が区画されている場合には区画された各区画部の中央領域の下方とされる範囲内にある、ことを特徴としている。   The invention according to claim 9 is the floor structure according to claim 8, wherein the first arrangement position is located above the center area of the floor slab when the top of the floor material is not partitioned, When the upper part of the flooring material is partitioned, it is characterized in that it is within the range defined as the lower part of the central region of each partitioned part.

床材の上方が区画されていない場合には、ビーム材の中でも床スラブの中央域の上方に位置する部分の振動振幅が大きく、床材の上方が区画されている場合には、ビーム材の中でも、区画された各区画部の中央領域の下方に位置する部分の振動振幅が大きい。したがって、このように振動振幅の大きい第１の配置位置には、振動減衰力の大きな動吸振器を配置することが、床衝撃音が良好に遮断する上で効果的となる。   When the upper part of the floor material is not partitioned, the vibration amplitude of the portion of the beam material located above the central area of the floor slab is large, and when the upper part of the floor material is partitioned, Especially, the vibration amplitude of the part located under the center area | region of each divided division is large. Therefore, disposing a dynamic vibration absorber having a large vibration damping force at the first arrangement position having a large vibration amplitude in this way is effective for satisfactorily blocking the floor impact sound.

請求項１０に記載の発明は、請求項８または請求項９に記載の床構造において、前記第２の配置位置に設けられた前記動吸振器の前記質量体は、前記第１の配置位置に設けられた前記動吸振器の前記質量体に比べて、質量が小さい、ことを特徴としている。   According to a tenth aspect of the present invention, in the floor structure according to the eighth or ninth aspect, the mass body of the dynamic vibration absorber provided at the second arrangement position is located at the first arrangement position. Compared to the mass body of the dynamic vibration absorber provided, the mass is small.

請求項１０に記載の床構造によれば、第２の配置位置に設けられた動吸振器の質量体が、第１の配置位置に設けられた動吸振器の質量体に比べて、質量が小さくなっているので、床構造全体における質量体の合計質量を抑えることができ、施工性が良い。   According to the floor structure of claim 10, the mass of the dynamic vibration absorber provided at the second arrangement position is larger than the mass of the dynamic vibration absorber provided at the first arrangement position. Since it becomes small, the total mass of the mass body in the whole floor structure can be suppressed, and workability is good.

請求項１１に記載の発明は、請求項１乃至請求項１０の何れか１項に記載の床構造において、前記動吸振器の質量をｍ、単位面積当たりの前記床材、前記ビーム材、前記支持部材、及び前記第１弾性部材の質量の合計を、前記単位面積当たりの前記動吸振器を支持する前記支持部材の数で除した値をＭとした場合、Ｍ×（１／１５）≦ｍ≦Ｍ×２．５を満足する、ことを特徴としている。   The invention according to claim 11 is the floor structure according to any one of claims 1 to 10, wherein the mass of the dynamic vibration absorber is m, the floor material per unit area, the beam material, When a value obtained by dividing the total mass of the support member and the first elastic member by the number of the support members supporting the dynamic vibration absorber per unit area is M, M × (1/15) ≦ It is characterized by satisfying m ≦ M × 2.5.

請求項１１に記載の床構造では、Ｍ×（１／１５）≦ｍ≦Ｍ×２．５を満足しているので、床衝撃音を良好に遮断することができる。   In the floor structure according to the eleventh aspect, since M × (1/15) ≦ m ≦ M × 2.5 is satisfied, the floor impact sound can be well blocked.

請求項１２に記載の発明は、請求項１乃至請求項１０の何れか１項に記載の床構造において、前記動吸振器の質量をｍ（ｋｇ）、前記第２弾性部材のばね定数をｋ（Ｎ／ｍ）として、前記動吸振器における固有振動数ｆ０Ｘ（Ｈｚ）（ｆ０Ｘ＝１／２π×（ｋ／ｍ）１／２）を、前記床スラブを備えた建物の躯体の各固有振動特性、前記建物の内装部の各固有振動特性、又は、予め想定された入力振動特性のいずれかに応じて設定する、ことを特徴としている。 The invention according to claim 12 is the floor structure according to any one of claims 1 to 10, wherein the mass of the dynamic vibration absorber is m (kg), and the spring constant of the second elastic member is k. (N / m) is the natural frequency f 0X (Hz) (f 0X = 1 / 2π × (k / m) 1/2 ) in the dynamic vibration absorber, and each of the buildings of the building including the floor slab It is characterized in that it is set according to any of the natural vibration characteristics, the natural vibration characteristics of the interior part of the building, or the input vibration characteristics assumed in advance.

請求項１２に記載の床構造によれば、動吸振器における固有振動数ｆ０Ｘ（Ｈｚ）（ｆ０Ｘ＝１／２π×（ｋ／ｍ）１／２）を、前記床スラブを備えた建物の躯体の各固有振動特性、その建物の内装部の各固有振動特性、又は、予め想定された入力振動特性のいずれかに応じて設定することで、床衝撃音が良好に遮断される。 According to the floor structure of Claim 12, the natural frequency f0X (Hz) ( f0X = 1/2 ( pi ) * (k / m) < 1/2 >) in a dynamic vibration absorber is made into the building provided with the said floor slab By setting according to any of the natural vibration characteristics of the housing, the natural vibration characteristics of the interior of the building, or the input vibration characteristics assumed in advance, the floor impact sound is satisfactorily cut off.

以上説明したように、本発明の床構造及び床支持具によれば、従来よりも床衝撃音の遮断性能を良好にできる。   As described above, according to the floor structure and the floor support of the present invention, the floor impact sound blocking performance can be made better than before.

（第１の実施形態）
本発明における床構造及び床構造に適用される床支持具の第１の実施形態を図面に基づき説明する。なお、図中の矢印ＵＰは床構造における上方向を示す。
図１に示される床構造１０は、主に集合住宅に用いられる二重床（乾式遮音二重床）の構造であり、上階で発せられて階下に伝播する床衝撃音（歩行音、物の落下音、子供の飛び跳ね等）を低減させるための構造である。 (First embodiment)
1st Embodiment of the floor support applied to the floor structure in this invention and a floor structure is described based on drawing. In addition, arrow UP in a figure shows the upward direction in a floor structure.
A floor structure 10 shown in FIG. 1 is a double floor (dry sound insulation double floor) structure mainly used in an apartment house, and a floor impact sound (walking sound, object) that is emitted from the upper floor and propagates downward. This is a structure for reducing falling sounds of children, jumping of children, and the like.

本実施形態の床構造１０は、間隔を置いて配置された複数本の大引１１を備え、大引１１の上には、大引１１と交差する方向に延びる複数本の根太１３が間隔を置いて配置されている。そして、この床構造１０は、躯体床となるコンクリート製の床スラブ１２と上床材１４の貼り付けられた大引１１との間に、所定の間隔で複数本並べられた床支持具１６を介在させており、床支持具１６の介在によって床スラブ１２と上床材１４の貼り付けられた大引１１との間に空間を形成して遮音効果を得る状態としている。
なお、本実施形態の上床材１４は、捨て板１４Ｂの上に仕上げ材１４Ｃを設けた積層構造となっている。 The floor structure 10 of this embodiment includes a plurality of large forks 11 arranged at intervals, and a plurality of joists 13 extending in a direction intersecting with the large forks 11 are spaced on the large forks 11. It is placed and placed. The floor structure 10 includes a plurality of floor supports 16 arranged at a predetermined interval between a concrete floor slab 12 serving as a frame floor and a large fork 11 on which an upper floor material 14 is attached. In addition, a space is formed between the floor slab 12 and the large pull 11 on which the upper floor material 14 is pasted by the intervention of the floor support 16 to obtain a sound insulation effect.
In addition, the upper floor material 14 of this embodiment has a laminated structure in which the finishing material 14C is provided on the discard plate 14B.

図２に示されるように、床支持具１６は、床スラブ１２上に配置される第１弾性部材としてのクッションゴム１８を備える。クッションゴム１８は、略円筒状とされており、大引１１からの振動を減衰させるために、床スラブ１２上に支持されるものであり、弾性変形可能とされる。   As shown in FIG. 2, the floor support 16 includes a cushion rubber 18 as a first elastic member disposed on the floor slab 12. The cushion rubber 18 has a substantially cylindrical shape, and is supported on the floor slab 12 in order to attenuate the vibration from the large pull 11, and can be elastically deformed.

クッションゴム１８上には、中間受け部としての中間受け部材２０を介して支持ボルト２２が直立状態で支持されている。中間受け部材２０は、円筒状とされて中間部にフランジ部２０Ａを備え、円筒部の一方側がクッションゴム１８の筒内側に挿入されると共にフランジ部２０Ａの下面（クッションゴム１８側へ向けられた面）がクッションゴム１８の上面（床スラブ１２側の面と反対側の面）に固着されている。中間受け部材２０の円筒部内周面には、雌ネジ部２０Ｂが形成され、この雌ネジ部２０Ｂには、支持ボルト２２の軸部に形成された雄ネジ部２２Ａが螺合される。これにより、中間受け部材２０が支持ボルト２２に一体化される。   On the cushion rubber 18, a support bolt 22 is supported in an upright state via an intermediate receiving member 20 as an intermediate receiving portion. The intermediate receiving member 20 has a cylindrical shape and is provided with a flange portion 20A in the intermediate portion. One side of the cylindrical portion is inserted into the cylinder inside of the cushion rubber 18 and is directed to the lower surface of the flange portion 20A (to the cushion rubber 18 side). Surface) is fixed to the upper surface of the cushion rubber 18 (the surface opposite to the surface on the floor slab 12 side). A female screw portion 20B is formed on the inner peripheral surface of the cylindrical portion of the intermediate receiving member 20, and a male screw portion 22A formed on the shaft portion of the support bolt 22 is screwed into the female screw portion 20B. Thereby, the intermediate receiving member 20 is integrated with the support bolt 22.

支持ボルト２２は、クッションゴム１８と反対側、すなわち、床スラブ１２と反対方向へ延びて、梁受け部材２４を介して大引１１を支持するようになっている。梁受け部材２４は、円筒状とされて一方開口部から外側へ向けて突き出した鍔部２４Ａを備える。梁受け部材２４の円筒部２４Ｂは、大引１１の孔１１Ａ内に挿入されて固着され、鍔部２４Ａの上面（大引１１側へ向けられた面）が大引１１の下面（床スラブ１２と対向する側の面）に固着される。梁受け部材２４の円筒部内周面には、雌ネジ部２４Ｃが形成され、この雌ネジ部２４Ｃには、支持ボルト２２の軸部に形成された雄ネジ部２２Ｂが螺合される。これらにより、大引１１は、床スラブ１２との間に間隔をもって配置される。   The support bolt 22 extends in the opposite direction to the cushion rubber 18, that is, in the direction opposite to the floor slab 12, and supports the large pull 11 via the beam receiving member 24. The beam receiving member 24 includes a collar portion 24A that is cylindrical and protrudes outward from one opening. The cylindrical portion 24B of the beam receiving member 24 is inserted and fixed in the hole 11A of the large pull 11, and the upper surface (surface directed toward the large pull 11) of the collar portion 24A is the lower surface of the large pull 11 (floor slab 12). To the opposite surface). A female screw portion 24C is formed on the inner peripheral surface of the cylindrical portion of the beam receiving member 24, and a male screw portion 22B formed on the shaft portion of the support bolt 22 is screwed into the female screw portion 24C. Thus, the large fork 11 is disposed with a space between the floor slab 12.

支持ボルト２２の先端部には、マイナスドライバを差し込むための溝（図示省略）が形成されており、大引１１の上に根太１３が載せられる前の状態において、マイナスドライバを支持ボルト２２の溝（図示省略）に差し込んで支持ボルト２２を回転させることによって、床スラブ１２からの大引１１の高さを調節することができるようになっている。   A groove (not shown) for inserting a flathead screwdriver is formed at the tip of the support bolt 22, and the flathead screwdriver 13 is inserted into the groove of the support bolt 22 before the joist 13 is placed on the pulling 11. The height of the pull 11 from the floor slab 12 can be adjusted by inserting it into (not shown) and rotating the support bolt 22.

中間受け部材２０のフランジ部２０Ａの上面である受け面２０Ｃには、動吸振器の構成要素の一つである第２弾性部材としてのクッション台座２６が配置されており、クッション台座２６の下面が受け面２０Ｃに加硫接着、又は接着剤等によって固着されている。
クッション台座２６は、円筒状とされて中央に挿入孔２６Ａが形成されており、この挿入孔２６Ａに支持ボルト２２が非接触で挿入された状態となっている。クッション台座２６は、大引１１からの振動を受けるために、中間受け部材２０を介して支持ボルト２２に支持されるものであり、軟質ゴムで構成されて弾性変形可能とされる。 A cushion base 26 as a second elastic member, which is one of the components of the dynamic vibration absorber, is disposed on the receiving surface 20C that is the upper surface of the flange portion 20A of the intermediate receiving member 20, and the lower surface of the cushion base 26 is It is fixed to the receiving surface 20C by vulcanization adhesion or adhesive.
The cushion pedestal 26 is cylindrical and has an insertion hole 26A formed in the center, and the support bolt 22 is inserted in a non-contact manner into the insertion hole 26A. The cushion pedestal 26 is supported by the support bolt 22 via the intermediate receiving member 20 in order to receive vibration from the large pull 11, and is made of soft rubber and can be elastically deformed.

クッション台座２６は、設置状態での上部が薄肉筒状で上方へ突出した突出部２６Ｃとされている。突出部２６Ｃの内径は、クッション台座２６の下部における内径と同様となっている。突出部２６Ｃの外周には、筒状の取付金具３８が配置されている。取付金具３８は、設置状態における下部に、径方向外側へ延びるフランジ部３８Ａを備え、このフランジ部３８Ａがクッション台座２６の上向き面２６Ｄの上に配置されている。クッション台座２６の上向き面２６Ｄは、取付金具３８のフランジ部３８Ａの下面へ加硫接着されている。   The cushion pedestal 26 is formed as a protruding portion 26 </ b> C that protrudes upward in a thin cylindrical shape in the installed state. The inner diameter of the protrusion 26 </ b> C is the same as the inner diameter of the lower portion of the cushion base 26. A cylindrical mounting bracket 38 is disposed on the outer periphery of the protruding portion 26C. The mounting bracket 38 includes a flange portion 38A that extends radially outward at the lower portion in the installed state, and the flange portion 38A is disposed on the upward surface 26D of the cushion base 26. The upward surface 26D of the cushion base 26 is vulcanized and bonded to the lower surface of the flange portion 38A of the mounting bracket 38.

取付金具３８は、設置状態における上部に、筒部３８Ｂを備えており、筒部３８Ｂの外周部には、雄ネジ部が形成されている。筒部３８Ｂの外周には、質量体４０の一部を構成するプレート部４１が配置され、このプレート部４１の中央部に形成された貫通孔４１Ａの雌ネジ部に筒部３８Ｂの雄ネジ部が螺合される。   The mounting bracket 38 includes a cylindrical portion 38B in the upper portion in the installed state, and a male screw portion is formed on the outer peripheral portion of the cylindrical portion 38B. A plate part 41 constituting a part of the mass body 40 is disposed on the outer periphery of the cylinder part 38B, and the male thread part of the cylinder part 38B is connected to the female screw part of the through hole 41A formed in the central part of the plate part 41. Are screwed together.

図３に示されるように、質量体４０のプレート部４１は、矩形板状とされており、長手方向の両端側の下面に、質量体４０の一部を構成する円柱状の丸鋼４２が溶接されている。本実施形態では、丸鋼４２における溶接部分は、丸鋼４２の軸方向中間部とされている。丸鋼４２の軸方向は、プレート部４１の長手方向に対して直交している。丸鋼４２には、汎用材料である規格品の丸鋼を所定長さに切断したものを適用している。このため、質量体４０の製造が容易であると共に、材料費を抑えることができる。   As shown in FIG. 3, the plate portion 41 of the mass body 40 has a rectangular plate shape, and columnar round steel 42 constituting a part of the mass body 40 is formed on the lower surfaces at both ends in the longitudinal direction. Welded. In this embodiment, the welded portion of the round steel 42 is an intermediate portion in the axial direction of the round steel 42. The axial direction of the round steel 42 is orthogonal to the longitudinal direction of the plate portion 41. As the round steel 42, a standard round steel, which is a general-purpose material, cut into a predetermined length is applied. For this reason, the mass body 40 can be easily manufactured and the material cost can be reduced.

本実施形態では、クッション台座２６が動吸振器のバネ、取付金具３８及び質量体４０が動吸振器の質量に対応している。
なお、支持ボルト２２は、クッション台座２６の重心、及び質量体４０の重心を通っている。また、質量体４０によって、クッション台座２６には圧縮方向の荷重が作用している。 In the present embodiment, the cushion base 26 corresponds to the spring of the dynamic vibration absorber, the mounting bracket 38 and the mass body 40 correspond to the mass of the dynamic vibration absorber.
The support bolt 22 passes through the center of gravity of the cushion base 26 and the center of gravity of the mass body 40. Further, the mass body 40 applies a load in the compression direction to the cushion base 26.

以上のような構成によれば、質量体４０は、取付金具３８を介してクッション台座２６に支持され、クッション台座２６の弾性変形によって変位して大引１１からの振動を減衰させる。ここで、質量体４０においては、サイズが大きい丸鋼４２がクッション台座２６の側方に配置されるので、床支持具１６をコンパクトに設置でき、図１（Ｂ）に示されるように、床スラブ１２から大引１１までの高さＨを抑えることができる。   According to the above configuration, the mass body 40 is supported by the cushion base 26 via the mounting bracket 38 and is displaced by the elastic deformation of the cushion base 26 to attenuate the vibration from the large pull 11. Here, in the mass body 40, since the round steel 42 with a large size is arrange | positioned at the side of the cushion base 26, the floor support 16 can be installed compactly, and as shown in FIG. The height H from the slab 12 to the large draw 11 can be suppressed.

また、図２に示すように、取付金具３８の筒内側にクッション台座２６の突出部２６Ｃが配置されることで、支持ボルト２２と取付金具３８とが接近することがあっても、支持ボルト２２が取付金具３８に直接接触する事はないので、異音の発生を防止することができる。   In addition, as shown in FIG. 2, the protrusion 26 </ b> C of the cushion pedestal 26 is disposed inside the cylinder of the mounting bracket 38, so that the support bolt 22 and the mounting bracket 38 may approach each other. Since there is no direct contact with the mounting bracket 38, the generation of abnormal noise can be prevented.

さらに、質量体４０は、取付金具３８に螺合させるだけで取り付けることができるので、クッション台座２６を大型の質量体へ加硫接着させる場合に比べて床支持具１６を製造しやすい。   Furthermore, since the mass body 40 can be attached simply by screwing it onto the mounting bracket 38, the floor support 16 can be manufactured more easily than when the cushion base 26 is vulcanized and bonded to a large mass body.

（第１の実施形態の施工手順）
次に、図２に示される床支持具１６を用いて二重床の床構造１０を構成する際の施工手順について説明する。 (Construction procedure of the first embodiment)
Next, a construction procedure for constructing the double floor structure 10 using the floor support 16 shown in FIG. 2 will be described.

まず、一体化されたクッションゴム１８、中間受け部材２０、クッション台座２６取付金具３８、及び質量体４０を、クッションゴム１８を下にして床スラブ１２上に設置する。
次に、クッション台座２６の挿入孔２６Ａに支持ボルト２２を上方から挿入し、支持ボルト２２の雄ネジ部２２Ａを中間受け部材２０の雌ネジ部２０Ｂに螺合させて取り付け、直立させる。次に、支持ボルト２２の雄ネジ部２２Ｂに梁受け部材２４の雌ネジ部２４Ｃを螺合させる。 First, the integrated cushion rubber 18, intermediate receiving member 20, cushion pedestal 26 mounting bracket 38, and mass body 40 are installed on the floor slab 12 with the cushion rubber 18 facing down.
Next, the support bolt 22 is inserted into the insertion hole 26 </ b> A of the cushion base 26 from above, and the male screw portion 22 </ b> A of the support bolt 22 is screwed to the female screw portion 20 </ b> B of the intermediate receiving member 20 to be attached and erect. Next, the female screw portion 24C of the beam receiving member 24 is screwed into the male screw portion 22B of the support bolt 22.

次に、梁受け部材２４の鍔部２４Ａ上に大引１１を固着する。ここで、マイナスドライバを支持ボルト２２の溝（図示省略）に差し込んで支持ボルト２２を回転させることによって、床スラブ１２からの大引１１の高さを調節する。   Next, the large pull 11 is fixed on the flange portion 24 </ b> A of the beam receiving member 24. Here, the height of the large pull 11 from the floor slab 12 is adjusted by inserting a flathead screwdriver into a groove (not shown) of the support bolt 22 and rotating the support bolt 22.

そして、大引１１の上に根太１３、捨て板１４Ｂ、及び仕上げ材１４Ｃが敷設され、以上によって、二重床の床構造１０が構成される。   And the joist 13, the discard board 14B, and the finishing material 14C are laid on the large pull 11, and the floor structure 10 of a double floor is comprised by the above.

（第１実施形態の作用）
次に、上記の実施形態の作用を説明する。
上階で発せられた床衝撃音（例えば、歩行音等）の振動は、根太１３を介して大引１１に伝わる。そして、大引１１の振動は、梁受け部材２４、支持ボルト２２、及び中間受け部材２０を介してクッション台座２６へ伝わる。これによって、クッション台座２６が弾性変形し、質量体４０が振動を吸収するように上下動することで、大引１１の振動を減衰する（動吸振器により振動が減衰。）。 (Operation of the first embodiment)
Next, the operation of the above embodiment will be described.
The vibration of the floor impact sound (for example, walking sound etc.) emitted on the upper floor is transmitted to the large draw 11 via the joist 13. The vibration of the large pull 11 is transmitted to the cushion base 26 via the beam receiving member 24, the support bolt 22, and the intermediate receiving member 20. As a result, the cushion base 26 is elastically deformed, and the mass body 40 moves up and down so as to absorb the vibration, thereby attenuating the vibration of the pull 11 (the vibration is attenuated by the dynamic vibration absorber).

ここで、クッション台座２６は、支持ボルト２２を囲んで配置されているため、支持ボルト２２に沿って弾性変形することになり、また、質量体４０も支持ボルト２２を囲んで配置されているため、支持ボルト２２に沿って移動することになるので、動吸振の作用が安定する。   Here, since the cushion base 26 is disposed so as to surround the support bolt 22, the cushion base 26 is elastically deformed along the support bolt 22, and the mass body 40 is also disposed so as to surround the support bolt 22. Since it moves along the support bolt 22, the action of dynamic vibration absorption is stabilized.

また、中間受け部材２０にクッション台座２６が固着され、クッション台座２６に質量体４０が固着されているので、例えば、振動によって質量体４０がクッション台座２６から浮く等のような無駄な移動を抑えられ、また、質量体４０の移動を振動周期に追従させ易くなるので、動吸振効果を高めることができる。
減衰された振動は、さらにクッションゴム１８によって減衰されて床スラブ１２へ伝わる。このため、床衝撃音が良好に遮断される。 Further, since the cushion base 26 is fixed to the intermediate receiving member 20, and the mass body 40 is fixed to the cushion base 26, for example, unnecessary movement such as the mass body 40 floating from the cushion base 26 due to vibration is suppressed. In addition, since the movement of the mass body 40 can easily follow the vibration cycle, the dynamic vibration absorption effect can be enhanced.
The damped vibration is further damped by the cushion rubber 18 and transmitted to the floor slab 12. For this reason, a floor impact sound is interrupted | blocked favorably.

（第２実施形態）
次に、床構造及び床構造に適用される床支持具の第２の実施形態を図４に基づき説明する。なお、第１の実施形態と同様の構成には同一符号を付し、その説明は省略する。
図４に示されるように、本実施形態の床構造１０では、梁材１７の上に捨て板１４Ｂ、及び仕上げ材１４Ｃが貼り付けられており、床支持具１６が梁材１７を支持している。なお、図４（Ａ）中、点線の丸印部分に、床支持具１６が配置されている。 (Second Embodiment)
Next, a second embodiment of a floor structure and a floor support applied to the floor structure will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the structure similar to 1st Embodiment, and the description is abbreviate | omitted.
As shown in FIG. 4, in the floor structure 10 of the present embodiment, the discard plate 14 </ b> B and the finishing material 14 </ b> C are pasted on the beam member 17, and the floor support 16 supports the beam member 17. Yes. In addition, in FIG. 4 (A), the floor support 16 is arrange | positioned in the dotted circle part.

本実施形態において、振動を減衰させる作用、及び効果は第１の実施形態と同様であり、動吸振器によって梁材１７の振動が抑えられる。   In this embodiment, the action and effect of damping the vibration are the same as in the first embodiment, and the vibration of the beam member 17 is suppressed by the dynamic vibration absorber.

（第３実施形態）
次に、床構造及び床構造に適用される床支持具の第３の実施形態を図５に基づき説明する。なお、前述した実施形態と同様の構成には同一符号を付し、その説明は省略する。 (Third embodiment)
Next, a third embodiment of a floor structure and a floor support applied to the floor structure will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the structure similar to embodiment mentioned above, and the description is abbreviate | omitted.

図５に示されるように、本実施形態の床構造１０では、溝型鋼（チャンネル）１９の上に捨て板１４Ｂ、及び仕上げ材１４Ｃが貼り付けられており、床支持具１６が溝型鋼１９を支持している。本実施形態において、振動を減衰させる作用、及び効果は第１の実施形態と同様であり、動吸振器によって溝型鋼１９の振動が抑えられる。   As shown in FIG. 5, in the floor structure 10 of the present embodiment, the discard plate 14 </ b> B and the finishing material 14 </ b> C are pasted on the groove steel (channel) 19, and the floor support 16 attaches the groove steel 19. I support it. In this embodiment, the action and effect of damping the vibration are the same as in the first embodiment, and the vibration of the groove steel 19 is suppressed by the dynamic vibration absorber.

（第４実施形態）
次に、床構造及び床構造に適用される床支持具の第４の実施形態を図６に基づき説明する。なお、前述した実施形態と同様の構成には同一符号を付し、その説明は省略する。 (Fourth embodiment)
Next, a floor structure and a fourth embodiment of a floor support applied to the floor structure will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the structure similar to embodiment mentioned above, and the description is abbreviate | omitted.

図６に示されるように、本実施形態では、突出部２６Ｃの形成されていないクッション台座２６の上に、中央に貫通孔２８Ａの形成された厚肉円盤状の質量体２８が接着されている。クッション台座２６、及び質量体２８の形状が第１の実施形態とは異なるが、振動を減衰させる作用、及び効果は第１の実施形態と同様である。   As shown in FIG. 6, in this embodiment, a thick disk-shaped mass body 28 having a through hole 28A formed in the center is bonded onto a cushion base 26 on which no protrusion 26C is formed. . Although the shapes of the cushion pedestal 26 and the mass body 28 are different from those of the first embodiment, the action and effect of damping the vibration are the same as those of the first embodiment.

（第５実施形態）
次に、床構造及び床構造に適用される床支持具の第５の実施形態を図７に基づき説明する。第５の実施形態は、各質量体が複数の支持ボルト２２に支持される点が特徴であり、他の構成については、前述した実施形態とほぼ同様の構成であるので、同一符号を付して説明を省略する。なお、中間受け部としての中間受け部材３４は、以下に説明する点を除いて前述した実施形態で説明した中間受け部材２０と同様の構成である。 (Fifth embodiment)
Next, a fifth embodiment of a floor structure and a floor support applied to the floor structure will be described with reference to FIG. The fifth embodiment is characterized in that each mass body is supported by a plurality of support bolts 22, and the other configurations are substantially the same as those in the above-described embodiment, and thus the same reference numerals are given. The description is omitted. The intermediate receiving member 34 as an intermediate receiving portion has the same configuration as the intermediate receiving member 20 described in the above-described embodiment except for the points described below.

図７に示されるように、中間受け部材３４は、クッションゴム１８の上面に沿ったフランジ部３４Ａの先端部分からクッションゴム１８の側部にほぼ沿って下方へ延びる筒部３４Ｂを備えると共に、筒部３４Ｂの先端部分から外側へ向かって鍔状に延びる受け部３４Ｃを備える。受け部３４Ｃと床スラブ１２との間には、振動時に受け部３４Ｃが床スラブ１２に触れない程度の間隔が設けられている。受け部３４Ｃの上面は、クッション台座２６を配置するための受け面とされており、クッション台座２６が接着剤等によって固着されている。   As shown in FIG. 7, the intermediate receiving member 34 includes a cylindrical portion 34 </ b> B that extends downward along the side portion of the cushion rubber 18 from the tip portion of the flange portion 34 </ b> A along the upper surface of the cushion rubber 18. A receiving portion 34C extending in a bowl shape from the tip portion of the portion 34B to the outside is provided. A space is provided between the receiving portion 34C and the floor slab 12 so that the receiving portion 34C does not touch the floor slab 12 during vibration. The upper surface of the receiving portion 34C is a receiving surface for placing the cushion pedestal 26, and the cushion pedestal 26 is fixed by an adhesive or the like.

各質量体２８は、これらの複数のクッション台座２６上に接着剤等によって固着されており、クッション台座２６、中間受け部材３４を介して複数の支持ボルト２２に支持される。これにより、振動時における質量体２８の移動は、クッション台座２６、中間受け部材３４を介して複数の支持ボルト２２に分散して伝わることになり、振動が吸収され易くなる。   Each mass body 28 is fixed to the plurality of cushion bases 26 by an adhesive or the like, and is supported by the plurality of support bolts 22 via the cushion base 26 and the intermediate receiving member 34. Thereby, the movement of the mass body 28 at the time of vibration is distributed and transmitted to the plurality of support bolts 22 via the cushion base 26 and the intermediate receiving member 34, and the vibration is easily absorbed.

（その他の実施形態）
なお、上記実施形態では、第２弾性部材としてのクッション台座２６が、支持部材としての支持ボルト２２に支持されていたが、大引１１、根太１３、梁材１７、溝型鋼１９等のビーム材に支持される構成としても良い。 (Other embodiments)
In the above embodiment, the cushion pedestal 26 as the second elastic member is supported by the support bolt 22 as the support member. However, the beam material such as the draw 11, the joist 13, the beam material 17, and the grooved steel 19 is used. It is good also as a structure supported by.

また、上記実施形態では、第２弾性部材が軟質ゴムで構成されたクッション台座２６である場合を例に挙げて説明したが、第２弾性部材は、例えば、圧縮コイルバネ等のような弾性変形可能な他の弾性部材であってもよい。   In the above embodiment, the case where the second elastic member is the cushion base 26 made of soft rubber has been described as an example. However, the second elastic member can be elastically deformed such as a compression coil spring, for example. Other elastic members may be used.

さらに、上記実施形態では、第２弾性部材としてのクッション台座２６が接着剤等によって中間受け部材２０、３４に固着されているが、第２弾性部材は、例えば、支持部材に直接固着される等のように、上記実施形態以外の配置された位置に固着される構成としてもよい。また、第２弾性部材は、機械的接合によって中間受け部等の配置された位置に取り付けられてもよい。   Furthermore, in the above embodiment, the cushion base 26 as the second elastic member is fixed to the intermediate receiving members 20 and 34 by an adhesive or the like. However, the second elastic member is directly fixed to the support member, for example. As described above, it may be configured to be fixed at a position other than the above embodiment. Further, the second elastic member may be attached to a position where the intermediate receiving portion or the like is disposed by mechanical joining.

さらにまた、上記実施形態では、中間受け部としての中間受け部材２０、３４が、支持部材としての支持ボルト２２に取り付けられて一体化されているが、支持部材の一部に中間受け部を形成してもよい。   Furthermore, in the above embodiment, the intermediate receiving members 20 and 34 as the intermediate receiving portions are attached to and integrated with the supporting bolts 22 as the supporting members, but the intermediate receiving portion is formed in a part of the supporting member. May be.

なお、上記実施形態では、床スラブ１２がコンクリート製であるコンクリート床の場合について説明したが、床スラブは、木製等の他の床スラブであってもよい。   In addition, although the said embodiment demonstrated the case where the floor slab 12 was a concrete floor made from concrete, the floor slab may be other floor slabs, such as wooden.

動吸振器（クッション台座２６、質量体２８、質量体４０、取付金具３８等）の質量をｍ、単位面積当たりの床材１４、ビーム部材（大引１１、根太１３、梁材１７、溝型鋼１９等）、支持部材（支持ボルト２２、梁受け部材２４、中間受け部材２０、中間受け部材３４等）、及び第１弾性部材（クッションゴム１８）の質量の合計を、前記単位面積当たりの動吸振器を支持する支持部材（支持ボルト２２）の数で除した値をＭとした場合、Ｍ×（１／１５）≦ｍ≦Ｍ×２．５を満足することが好ましく、これにより、床衝撃音を良好に遮断することができる。   The mass of the dynamic vibration absorber (cushion pedestal 26, mass body 28, mass body 40, mounting bracket 38, etc.) is m, flooring 14 per unit area, beam member (outline 11, joist 13, beam material 17, channel steel) 19), the support member (support bolt 22, beam receiving member 24, intermediate receiving member 20, intermediate receiving member 34, etc.) and the first mass of the first elastic member (cushion rubber 18) When M is a value divided by the number of support members (support bolts 22) that support the vibration absorber, it is preferable to satisfy M × (1/15) ≦ m ≦ M × 2.5. The impact sound can be well blocked.

動吸振器（クッション台座２６、質量体２８、質量体４０、取付金具３８等）の質量をｍ（ｋｇ）、第２弾性部材（クッション台座２６）のばね定数をｋ（Ｎ／ｍ）として、動吸振器における固有振動数ｆ０Ｘ（Ｈｚ）（ｆ０Ｘ＝１／２π×（ｋ／ｍ）１／２）を、床スラブ１２を備えた建物の躯体の各固有振動特性、建物の内装部の各固有振動特性、又は、予め想定された入力振動特性のいずれかに応じて設定することが好ましく、これにより、床衝撃音を良好に遮断することができる。 The mass of the dynamic vibration absorber (cushion base 26, mass body 28, mass body 40, mounting bracket 38, etc.) is m (kg), and the spring constant of the second elastic member (cushion base 26) is k (N / m). The natural frequency f 0X (Hz) (f 0X = 1 / 2π × (k / m) 1/2 ) in the dynamic vibration absorber, each natural vibration characteristic of the building frame including the floor slab 12, and the interior of the building It is preferable to set according to any one of the natural vibration characteristics or the input vibration characteristics assumed in advance, and thereby the floor impact sound can be well blocked.

上記実施形態では、床スラブ１２上全体に渡って動吸振器付きの床支持具１６を配置したが、動吸振器付きの床支持具１６は、床スラブ１２における振動の発生しやすいスラブ特定領域の上方、又は、床材１４における振動の発生しやすい床特定領域の下方、における範囲内にのみ設け、その他の領域には、動吸振器の取り付けられていない床支持具１６を設けるようにしても良い。この場合も、動吸振器が振動を有効に減衰して衝撃音を低減するので、床衝撃音の遮断性能を良好とすることが可能となる。   In the above embodiment, the floor support 16 with a dynamic vibration absorber is arranged over the entire floor slab 12, but the floor support 16 with a dynamic vibration absorber is a slab specific region in which vibration is likely to occur in the floor slab 12. Or a floor support 16 to which a dynamic vibration absorber is not attached is provided in the other area, or in the area below the floor specific area where vibration is likely to occur in the flooring 14. Also good. Also in this case, since the dynamic vibration absorber effectively attenuates the vibration to reduce the impact sound, it is possible to improve the floor impact sound blocking performance.

なお、スラブ特定領域とは、より具体的には、例えば、床スラブ１２の中央部分、床スラブ１２の振動の腹となる位置を含む部分のことである。
また、床特定領域とは、より具体的には、例えば、床材１４の上方に収容部（押入れ、クローゼット等）、歩行用通路（廊下等）、洗濯機等の振動発生機器を設置するための機器設置領域のことである。 More specifically, the slab specific region is, for example, a central portion of the floor slab 12 and a portion including a position that becomes an antinode of vibration of the floor slab 12.
More specifically, the floor specific region is, for example, for installing a vibration generating device such as a storage part (a closet, a closet, etc.), a walkway (a corridor, etc.), a washing machine, etc. above the flooring 14. This is the equipment installation area.

床支持具１６の配置位置を、大振幅の振動が生じうる第１の配置位置と、第１の配置よりも振動の振幅が小さい第２の配置位置とに分けた時に、大振幅の振動が生じうる第１の配置位置に配置された床支持具１６の動吸振器は、第１の配置よりも振動の振幅が小さい第２の配置位置に配置された床支持具１６の動吸振器よりも振動減衰力を大きく設定することが好ましい。これにより、ビーム材に大振幅の振動が生じた場合にも、床衝撃音を良好に遮断することができる。   When the arrangement position of the floor support 16 is divided into a first arrangement position where a large amplitude vibration can occur and a second arrangement position where the vibration amplitude is smaller than the first arrangement, the large amplitude vibration is generated. The dynamic vibration absorber of the floor support 16 arranged at the first arrangement position that can be generated is more than the dynamic vibration absorber of the floor support 16 arranged at the second arrangement position where the amplitude of vibration is smaller than that of the first arrangement. Also, it is preferable to set the vibration damping force large. Thereby, even when a large amplitude vibration is generated in the beam material, the floor impact sound can be well blocked.

ここで、振動減衰力を小さくするには、例えば、動吸振器の質量体４０（または質量体２８）の質量を小さくすることで実現できる。第２の配置位置に設けられた動吸振器の質量体４０（または質量体２８）の質量を、第１の配置位置に設けられた動吸振器の質量体４０（または質量体２８）の質量に比べて小さく設定することで、床構造全体における質量体４０（または質量体２８）の合計質量を抑えることができ、施工性を向上することができる。   Here, the vibration damping force can be reduced by reducing the mass of the mass body 40 (or mass body 28) of the dynamic vibration absorber, for example. The mass of the mass body 40 (or mass body 28) of the dynamic vibration absorber provided at the second arrangement position is the mass of the mass body 40 (or mass body 28) of the dynamic vibration absorber provided at the first arrangement position. By setting to be smaller than, the total mass of the mass body 40 (or mass body 28) in the entire floor structure can be suppressed, and workability can be improved.

また、床材１４の上方が区画されていない場合には、ビーム材の中でも床スラブ１２の中央域の上方に位置する部分の振動振幅が大きく、床材１４の上方が区画されている場合には、ビーム材の中でも、区画された各区画部の中央領域の下方に位置する部分の振動振幅が大きい。したがって、このように振動振幅の大きい第１の配置位置には、振動減衰力の大きな動吸振器を配置することが、床衝撃音が良好に遮断する上で効果的となる。   Further, when the upper portion of the flooring 14 is not partitioned, the vibration amplitude of the portion of the beam material located above the central region of the floor slab 12 is large, and the upper portion of the flooring 14 is partitioned. In the beam material, the vibration amplitude of the portion located below the central region of each partitioned section is large. Therefore, disposing a dynamic vibration absorber having a large vibration damping force at the first arrangement position having a large vibration amplitude in this way is effective for satisfactorily blocking the floor impact sound.

上記実施形態では、動吸振器を中間受け部材２０（または中間受け部材３４）を支持ボルト２２に連結したが、動吸振器を直接ビーム材（大引１１、根太１３、梁材１７、溝型鋼１９等）に取り付けても良い。   In the above embodiment, the dynamic vibration absorber is connected to the support bolt 22 by the intermediate receiving member 20 (or the intermediate receiving member 34). However, the dynamic vibration absorber is directly connected to the beam material (Ohiki 11, joist 13, beam material 17, groove steel). 19 etc.).

（試験例）
本発明の効果を確かめるために、本発明の適用された実施例の床構造を３種、及び比較例に係る床構造を１種試作し、床衝撃音の低減効果の比較試験を行った。
以下に各々の床構造を説明する。 (Test example)
In order to confirm the effect of the present invention, three types of floor structures of the examples to which the present invention was applied and one type of floor structure according to the comparative example were prototyped, and a comparative test of the effect of reducing floor impact sound was performed.
Each floor structure will be described below.

比較例：図８に示すように、ベースパネル１４Ａ、捨て板１４Ｂ、及び仕上げ材１４Ｃの３層からなる上床材１４が、床支持金具１６によって床スラブ１２上に支持されている（ビーム材無し）。なお、床のサイズ、及び床支持金具１６の配置間隔は、図中に示されている通りである。動吸振器は４８個使用。   Comparative Example: As shown in FIG. 8, an upper floor material 14 composed of three layers of a base panel 14A, a discard plate 14B, and a finishing material 14C is supported on the floor slab 12 by a floor support metal fitting 16 (no beam material). ). In addition, the floor size and the arrangement interval of the floor support brackets 16 are as shown in the figure. Use 48 dynamic vibration absorbers.

実施例１：第１の実施形態で説明した床構造であり、大引１１が床支持金具１６によって床スラブ１２上に支持されている。なお、大引、及び根太の材質は木材であり、大引の断面寸法は９０×９０ｍｍ、根太の断面寸法は３６×４５ｍｍである。動吸振器は２０個使用（図１参照。）。   Example 1: The floor structure described in the first embodiment, and the large pull 11 is supported on the floor slab 12 by the floor support bracket 16. In addition, the material of the large drawing and joist is wood, the cross sectional dimension of the large drawing is 90 × 90 mm, and the cross sectional size of the joist is 36 × 45 mm. 20 dynamic vibration absorbers are used (see Fig. 1).

実施例２：第２の実施形態で説明した床構造であり、梁材１７が床支持金具１６によって床スラブ１２上に支持されている。なお、梁の断面寸法は１５０×２００ｍｍである。動吸振器は２０個使用（図４参照。）。   Example 2: The floor structure described in the second embodiment, in which the beam member 17 is supported on the floor slab 12 by the floor support bracket 16. The cross-sectional dimension of the beam is 150 × 200 mm. 20 dynamic vibration absorbers are used (see Fig. 4).

実施例３：第３の実施形態で説明した床構造であり、溝型鋼１９が床支持金具１６によって床スラブ１２上に支持されている。なお、溝型鋼の断面寸法は、１００×５０×５×７．５ｍｍである。第１，２実施例では、ビーム材が木材であったが、この実施例ではビーム材を木材から鋼材にすることで、ビーム材のヤング率を上げ、ビーム材の剛性を上げている。このため、実施例１，２に比較してビーム材の高さ寸法が小さくなり、床下空間が少なくて済む。動吸振器は３０個使用（図５参照。）。   Example 3: The floor structure described in the third embodiment, in which the channel steel 19 is supported on the floor slab 12 by the floor support bracket 16. In addition, the cross-sectional dimension of the channel steel is 100 × 50 × 5 × 7.5 mm. In the first and second embodiments, the beam material is wood, but in this embodiment, the beam material is changed from wood to steel, thereby increasing the Young's modulus of the beam material and increasing the rigidity of the beam material. For this reason, the height dimension of a beam material becomes small compared with Example 1, 2, and underfloor space may be small. 30 dynamic vibration absorbers are used (see Fig. 5).

試験方法：床面で床衝撃音を発生させ、動吸振器を全く取り付けない構成の床構造における重量床衝撃音レベルを基準にして、重量床衝撃音レベルの改善量（ｄＢ）を調べた。なお、比較した周波数は、６３Ｈｚ、１２５Ｈｚ、２５０Ｈｚ、５００Ｈｚとした。   Test method: The improvement amount (dB) of the heavy floor impact sound level was examined on the basis of the heavy floor impact sound level in the floor structure in which the floor impact sound was generated on the floor surface and the dynamic vibration absorber was not attached at all. The compared frequencies were 63 Hz, 125 Hz, 250 Hz, and 500 Hz.

Figure 2008095397
試験の結果、ビーム材に動吸振器を連結した実施例の床構造は、ビーム材が無く、床材に動吸振器を連結した比較例に対し、動吸振器の設置数が少なく、重量床衝撃音レベルの改善効果に優れていることが分かる。
Figure 2008095397
 As a result of the test, the floor structure of the example in which the dynamic vibration absorber is connected to the beam material has a smaller number of installed dynamic vibration absorbers than the comparative example in which there is no beam material and the dynamic vibration absorber is connected to the floor material. It turns out that it is excellent in the improvement effect of an impact sound level.

実施例の床構造は、剛性の大きなビーム材を使用することにより、十分な床剛性を保ちつつ、床支持金具の支持ピッチを大きくすることができるので、床衝撃音の伝達（入力）箇所が少なくなり、衝撃力が分散されることにより、比較例よりも遮音性能が向上している。また、実施例の床構造では、比較例よりもｌ動吸振器の設置箇所が少なく、安価な床構造を提供できる。   The floor structure of the embodiment can increase the support pitch of the floor support bracket while maintaining sufficient floor rigidity by using a beam material having high rigidity. By reducing the impact force, the sound insulation performance is improved as compared with the comparative example. Moreover, in the floor structure of an Example, there are few installation locations of 1 dynamic vibration absorber compared with a comparative example, and an inexpensive floor structure can be provided.

（Ａ）は本発明の第１の実施形態に係る床構造を示す平面図であり、（Ｂ）は本発明の第１の実施形態に係る床構造及び床支持具の縦断面を示す断面図である。(A) is a top view which shows the floor structure which concerns on the 1st Embodiment of this invention, (B) is sectional drawing which shows the longitudinal cross-section of the floor structure and floor support which concern on the 1st Embodiment of this invention It is. 床支持具を拡大した拡大断面図である。It is the expanded sectional view which expanded the floor support tool. 質量体の斜視図である。It is a perspective view of a mass body. （Ａ）は本発明の第２の実施形態に係る床構造を示す平面図であり、（Ｂ）は本発明の第２の実施形態に係る床構造及び床支持具の縦断面を示す断面図である。(A) is a top view which shows the floor structure which concerns on the 2nd Embodiment of this invention, (B) is sectional drawing which shows the longitudinal cross-section of the floor structure and floor support which concern on the 2nd Embodiment of this invention It is. （Ａ）は本発明の第３の実施形態に係る床構造を示す平面図であり、（Ｂ）は本発明の第３の実施形態に係る床構造及び床支持具の縦断面を示す断面図である。(A) is a top view which shows the floor structure which concerns on the 3rd Embodiment of this invention, (B) is sectional drawing which shows the longitudinal cross-section of the floor structure and floor support which concern on the 3rd Embodiment of this invention It is. 本発明の第４の実施形態に係る床構造及び床支持具の縦断面を示す断面図である。It is sectional drawing which shows the longitudinal cross-section of the floor structure which concerns on the 4th Embodiment of this invention, and a floor support tool. 本発明の第５の実施形態に係る床構造及び床支持具の縦断面を示す断面図である。It is sectional drawing which shows the longitudinal cross-section of the floor structure and floor support which concern on the 5th Embodiment of this invention. （Ａ）は比較例に係る床構造を示す平面図であり、（Ｂ）は比較例に係る床構造及び床支持具の縦断面を示す断面図である。(A) is a top view which shows the floor structure which concerns on a comparative example, (B) is sectional drawing which shows the longitudinal cross-section of the floor structure and floor support which concern on a comparative example.

符号の説明Explanation of symbols

１０ 床構造
１１ 大引（ビーム材）
１２ 床スラブ
１３ 根太（ビーム材）
１４ 上床材（床材）
１７ 梁材（ビーム材）
１９ 溝型鋼（ビーム材）
１８ クッションゴム（第１弾性部材）
２０ 中間受け部材（中間受け部）
２２ 支持ボルト（支持部材）
２６ クッション台座（第２弾性部材。動吸振器）
２８ 質量体（動吸振器）
３４ 中間受け部材（中間受け部）
３８ 取付金具（動吸振器）
４０ 質量体（動吸振器） 10 Floor structure 11 Large draw (beam material)
12 floor slab 13 joist (beam material)
14 Upper flooring (flooring)
17 Beam material
19 Channel steel (beam material)
18 Cushion rubber (first elastic member)
20 Intermediate receiving member (intermediate receiving part)
22 Support bolt (support member)
26 Cushion base (second elastic member, dynamic vibration absorber)
28 Mass body (dynamic vibration absorber)
34 Intermediate receiving member (intermediate receiving part)
38 Mounting bracket (Dynamic vibration absorber)
40 Mass body (dynamic vibration absorber)

Claims (12)

床スラブと、
前記床スラブ上に支持され、弾性変形可能であって振動を減衰させる第１弾性部材と、
前記第１弾性部材上に支持され、前記床スラブと反対方向へ延びる支持部材と、
前記支持部材上に支持され、前記床スラブとの間に間隔をもって配置されるビーム材と、
前記ビーム材に取り付けられる床材と、
前記支持部材に支持されて弾性変形可能な第２弾性部材、及び前記第２弾性部材に支持される質量体を含んで構成される動吸振器と、
を有することを特徴とする床構造。 Floor slabs,
A first elastic member supported on the floor slab and elastically deformable to damp vibrations;
A support member supported on the first elastic member and extending in a direction opposite to the floor slab;
A beam member supported on the support member and disposed at a distance from the floor slab;
A flooring attached to the beam material;
A second elastic member supported by the support member and elastically deformable, and a dynamic vibration absorber configured to include a mass body supported by the second elastic member;
The floor structure characterized by having. 前記床スラブがコンクリート製であることを特徴とする請求項１記載の床構造。   The floor structure according to claim 1, wherein the floor slab is made of concrete. 前記支持部材に一体化して設けられて受け面を備えた中間受け部を有し、前記受け面に前記第２弾性部材が配置されている、ことを特徴とする請求項１または請求項２に記載の床構造。   3. The intermediate receiving portion having a receiving surface provided integrally with the support member, wherein the second elastic member is disposed on the receiving surface. The floor structure described. 前記第２弾性部材及び前記質量体の中央に挿入孔が形成され、前記挿入孔に前記支持部材が挿入されている、ことを特徴とする請求項１乃至請求項３の何れか１項に記載の床構造。   The insertion hole is formed in the center of the said 2nd elastic member and the said mass body, The said supporting member is inserted in the said insertion hole, The any one of Claim 1 thru | or 3 characterized by the above-mentioned. Floor structure. 前記第２弾性部材は、前記支持部材、及び前記質量体に固着されている、ことを特徴とする請求項１乃至請求項４の何れか１項に記載の床構造。   The floor structure according to any one of claims 1 to 4, wherein the second elastic member is fixed to the support member and the mass body. 前記質量体が前記第２弾性部材を介して複数の前記支持部材に支持されている、ことを特徴とする請求項１乃至請求項５の何れか１項に記載の床構造。   The floor structure according to any one of claims 1 to 5, wherein the mass body is supported by a plurality of the support members via the second elastic member. 前記動吸振器を支持した前記支持部材は、前記床スラブにおける振動の発生しやすいスラブ特定領域の上方、又は、前記床材における振動の発生しやすい床特定領域の下方、における範囲内にのみ設けられる、ことを特徴とする請求項１乃至請求項６の何れか１項に記載の床構造。   The support member that supports the dynamic vibration absorber is provided only in a range above the slab specific area where vibration is likely to occur in the floor slab or below the floor specific area where vibration is likely to occur in the floor material. The floor structure according to any one of claims 1 to 6, wherein the floor structure is formed. 大振幅の振動が生じうる第１の配置位置に配置された前記支持部材に支持される前記動吸振器は、前記第１の配置よりも振動の振幅が小さい第２の配置位置に配置された前記支持部材に支持される前記動吸振器よりも振動減衰力が大きく設定されている、ことを特徴とする請求項１乃至請求項７の何れか１項に記載の床構造。   The dynamic vibration absorber supported by the support member arranged at the first arrangement position where large amplitude vibration can occur is arranged at the second arrangement position where the amplitude of vibration is smaller than that of the first arrangement. The floor structure according to any one of claims 1 to 7, wherein a vibration damping force is set to be larger than that of the dynamic vibration absorber supported by the support member. 前記第１の配置位置は、前記床材の上方が区画されていない場合には前記床スラブの中央域の上方、前記床材の上方が区画されている場合には区画された各区画部の中央領域の下方とされる範囲内にある、ことを特徴とする請求項８に記載の床構造。   The first disposition position is located above the center area of the floor slab when the upper portion of the floor material is not partitioned, and when the upper portion of the floor material is partitioned. The floor structure according to claim 8, wherein the floor structure is within a range defined below the central region. 前記第２の配置位置に設けられた前記動吸振器の前記質量体は、前記第１の配置位置に設けられた前記動吸振器の前記質量体に比べて、質量が小さい、ことを特徴とする請求項８または請求項９に記載の床構造。   The mass body of the dynamic vibration absorber provided at the second arrangement position is smaller in mass than the mass body of the dynamic vibration absorber provided at the first arrangement position. The floor structure according to claim 8 or 9. 前記動吸振器の質量をｍ、単位面積当たりの前記床材、前記ビーム材、前記支持部材、及び前記第１弾性部材の質量の合計を、前記単位面積当たりの前記動吸振器を支持する前記支持部材の数で除した値をＭとした場合、Ｍ×（１／１５）≦ｍ≦Ｍ×２．５を満足する、ことを特徴とする請求項１乃至請求項１０の何れか１項に記載の床構造。   The mass of the dynamic vibration absorber is m, and the total mass of the floor material, the beam material, the support member, and the first elastic member per unit area is supported by the dynamic vibration absorber per unit area. 11. When the value divided by the number of support members is M, M × (1/15) ≦ m ≦ M × 2.5 is satisfied. Floor structure as described in. 前記動吸振器の質量をｍ（ｋｇ）、前記第２弾性部材のばね定数をｋ（Ｎ／ｍ）として、前記動吸振器における固有振動数ｆ０Ｘ（Ｈｚ）（ｆ０Ｘ＝１／２π×（ｋ／ｍ）１／２）を、前記床スラブを備えた建物の躯体の各固有振動特性、前記建物の内装部の各固有振動特性、又は、予め想定された入力振動特性のいずれかに応じて設定する、ことを特徴とする請求項１乃至請求項１１の何れか１項に記載の床構造。 Assuming that the mass of the dynamic vibration absorber is m (kg) and the spring constant of the second elastic member is k (N / m), the natural frequency f 0X (Hz) in the dynamic vibration absorber (f 0X = 1 / 2π × (K / m) 1/2 ) to any of the natural vibration characteristics of the building frame including the floor slab, the natural vibration characteristics of the interior of the building, or the input vibration characteristics assumed in advance. It sets according to, The floor structure of any one of Claim 1 thru | or 11 characterized by the above-mentioned.
JP2006278901A 2006-10-12 2006-10-12 Floor structure Pending JP2008095397A (en)

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JP2010037799A (en) * 2008-08-05 2010-02-18 Bridgestone Corp Floor supporting implement and floor structure

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JPS62182358A (en) * 1986-02-07 1987-08-10 清水建設株式会社 Sound blocking floor structure
JPH02272138A (en) * 1989-04-13 1990-11-06 Kajima Corp Soundproof floor
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JP2001049880A (en) * 1999-08-05 2001-02-20 Sekisui House Ltd Adjusting method of dynamic damper
JP2004211289A (en) * 2002-12-26 2004-07-29 Shimizu Corp Supporting structure for dry double floor
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JP2010037799A (en) * 2008-08-05 2010-02-18 Bridgestone Corp Floor supporting implement and floor structure

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