JP5399096B2 - Floor support vibration absorber and floor structure - Google Patents

Floor support vibration absorber and floor structure

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Publication number
JP5399096B2
JP5399096B2 JP2009045898A JP2009045898A JP5399096B2 JP 5399096 B2 JP5399096 B2 JP 5399096B2 JP 2009045898 A JP2009045898 A JP 2009045898A JP 2009045898 A JP2009045898 A JP 2009045898A JP 5399096 B2 JP5399096 B2 JP 5399096B2
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floor
support
beam member
vibration absorber
flooring
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JP2010196440A (en
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健司 稲葉
悟 阿久津
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Bridgestone Corp
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Bridgestone Corp
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Description

本発明は、二重床の床材を支持する床支持吸振具、この床支持吸振具を用いた床構造に関する。   The present invention relates to a floor-supported vibration absorber that supports a floor material of a double floor, and a floor structure using the floor-supported vibration absorber.

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では、例えば、特許文献1、2に記載のように、弾性体と質量体を用いて床からの振動を減衰させる技術が開示されている。   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. In such a double floor structure, for example, as disclosed in Patent Documents 1 and 2, a technique for attenuating vibration from the floor using an elastic body and a mass body is disclosed.

特許文献1、2に記載の床構造によれば、床からの振動を効果的に減衰させることができる。しかしながら、特許文献1の床支持具は、第1弾性部材と第2弾性部材とが直列に配置されているため、床支持具の高さが高くなり、低床への対応には限界がある。また、特許文献2の動吸振器では、質量体を支持するゴム体の厚みが必要となり、低床への対応には限界がある。   According to the floor structures described in Patent Documents 1 and 2, vibrations from the floor can be effectively damped. However, in the floor support of Patent Document 1, since the first elastic member and the second elastic member are arranged in series, the height of the floor support becomes high, and there is a limit to dealing with a low floor. . Moreover, in the dynamic vibration absorber of patent document 2, the thickness of the rubber body which supports a mass body is required, and there exists a limit in the response | compatibility to a low floor.

特開2007−040093号公報JP 2007-04-0093 A 特開2008−180073号公報JP 2008-180073 A

本発明は、上記事実を考慮してなされたものであり、床衝撃音の遮断性能が良好になると共に、低床に適用することの可能な床支持吸振具、及び、床構造を提供することを課題とする。   The present invention has been made in consideration of the above-described facts, and provides a floor support vibration absorber and a floor structure that can be applied to a low floor while improving the performance of blocking floor impact sound. Is an issue.

請求項1に記載する本発明の床支持吸振具は、床スラブ上に配置され、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、前記床スラブとの間に間隔をもって配置される床材を支持する支持部材と、前記支持部材と離間した位置で前記床材の下面側に固定され、前記床材から前記床スラブへ向かう方向に延びる取付部材と、前記床材と間隔をあけて前記床材の下面に沿って配置され、前記取付部材に支持された弾性変形可能な梁部材と、前記梁部材の先端部に取り付けられ、前記梁部材の弾性変形によって変位して振動を減衰させる質量体と、前記梁部材の前記取付部材に支持された支持部と前記先端部との間に配置された、粘弾性変形可能な減衰部材と、を備えている。 A floor-supporting vibration absorber of the present invention described in claim 1 is disposed on a floor slab, is elastically deformable and damps vibrations, is supported on the first elastic member, and the floor A support member that supports a flooring disposed at a distance from the slab, and an attachment that is fixed to the lower surface side of the flooring at a position spaced from the supporting member and extends in a direction from the flooring toward the floor slab A member, an elastically deformable beam member disposed along the lower surface of the floor material with a gap from the floor material, supported by the attachment member, and attached to a distal end portion of the beam member, the beam member A mass body that is displaced by elastic deformation of the beam member to attenuate vibrations, and a damping member that is disposed between the support portion supported by the mounting member and the tip portion of the beam member and is capable of viscoelastic deformation. I have.

請求項1に記載する床支持吸振具によれば、床材に振動が加わった場合、この振動は、梁部材へ伝わる。これによって、梁部材が弾性変形して質量体が振動を吸収するように上下動することで、床材の振動が減衰し、その結果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。   According to the floor supporting vibration absorber described in claim 1, when vibration is applied to the flooring material, this vibration is transmitted to the beam member. As a result, the beam member is elastically deformed so that the mass body moves up and down so as to absorb the vibration, whereby the vibration of the flooring material is attenuated, and as a result, the vibration to the floor slab is attenuated. 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.

また、梁部材が、支持部材と離間した位置で床材の下面に取り付けられているので、梁部材と第1弾性部材とを並列的に配置することができ、床支持吸振具の高さを低くすることができる。   Further, since the beam member is attached to the lower surface of the flooring at a position separated from the support member, the beam member and the first elastic member can be arranged in parallel, and the height of the floor support vibration absorber is increased. Can be lowered.

また、梁部材を用いているので、梁部材の厚さ、幅及び支持スパンなどを変えることにより、容易にバネ定数を調整することができる。   Further, since the beam member is used, the spring constant can be easily adjusted by changing the thickness, width, support span, and the like of the beam member.

また、梁部材の先端部に質量体が取り付けられているので、入力振動に対する梁部材の動きが規制されにくく、より効果的に振動を減衰させることができる。
また、減衰部材を配置することにより、質量体の変位による梁部材の振動を早く減衰させることができると共に、共振ピークがなだらかになり床材の振動周波数の対象範囲を拡張することができる。
In addition, since the mass body is attached to the distal end portion of the beam member, the movement of the beam member with respect to the input vibration is not easily restricted, and the vibration can be attenuated more effectively.
Further, by arranging the damping member, the vibration of the beam member due to the displacement of the mass body can be quickly attenuated, and the resonance peak becomes gentle and the target range of the vibration frequency of the flooring can be expanded.

請求項2に記載する床支持吸振具は、前記梁部材は中間部で前記取付部材に支持され、前記中間部から両側に延びる先端部の各々に前記質量体が取り付けられていること、を特徴とする   The floor-supporting vibration absorber according to claim 2, wherein the beam member is supported by the attachment member at an intermediate portion, and the mass body is attached to each of tip portions extending from the intermediate portion to both sides. To

上記構成とすることにより、1本の梁部材に2つの質量体を取り付けることができ、床材の固有振動周波数にあわせて、質量体の質量を容易に調整することができる。   By setting it as the said structure, two mass bodies can be attached to one beam member, and according to the natural vibration frequency of a flooring, the mass of a mass body can be adjusted easily.

請求項3に記載する床構造は、床スラブと、前記床スラブと間隔をもって配置される床材と、請求項1又は2に記載の床支持吸振具と、を備えている。 A floor structure according to a third aspect includes a floor slab, a floor material arranged with a space from the floor slab, and the floor support vibration absorber according to the first or second aspect .

本発明の床構造によれば、床スラブと床材との間の距離が短い場合であっても、床支持吸振具によって、床衝撃音を良好に遮断することができる。   According to the floor structure of the present invention, even when the distance between the floor slab and the flooring is short, the floor impact sound can be satisfactorily blocked by the floor support vibration absorber.

以上説明したように、本発明の床支持吸振具、及び、床構造によれば、床衝撃音の遮断性能が良好となると共に、低床に適用することができる。   As described above, according to the floor supporting vibration absorbing device and the floor structure of the present invention, the floor impact sound blocking performance can be improved and applied to a low floor.

本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 tool which concern on this embodiment. 本実施形態に係る床構造の下地パネル及び床支持動吸振器の配置を示す平面図である。It is a top view which shows arrangement | positioning of the ground panel of a floor structure and floor support dynamic vibration absorber which concern on this embodiment. 本実施形態に係る床支持具及び動吸振器の断面図である。It is sectional drawing of the floor support tool and dynamic vibration absorber which concern on this embodiment. 本実施形態に係る動吸振器の分解斜視図である。It is a disassembled perspective view of the dynamic vibration absorber which concerns on this embodiment. 本実施形態に係る動吸振器の動作説明図である。It is operation | movement explanatory drawing of the dynamic vibration damper which concerns on this embodiment. 本実施形態に係る動吸振器の変形例の断面図である。It is sectional drawing of the modification of the dynamic vibration damper which concerns on this embodiment. 本実施形態に係る動吸振器の他の変形例の断面図である。It is sectional drawing of the other modification of the dynamic vibration damper which concerns on this embodiment. 本実施形態に係る動吸振器の他の変形例の断面図である。It is sectional drawing of the other modification of the dynamic vibration damper which concerns on this embodiment. 本実施形態に係る動吸振器の他の変形例の断面図である。It is sectional drawing of the other modification of the dynamic vibration damper which concerns on this embodiment. 本実施形態に係る動吸振器の他の変形例の断面図である。It is sectional drawing of the other modification of the dynamic vibration damper which concerns on this embodiment. 本実施形態に係る動吸振器の他の変形例の断面図である。It is sectional drawing of the other modification of the dynamic vibration damper which concerns on this embodiment. 本実施形態に係る動吸振器の他の変形例の断面図である。It is sectional drawing of the other modification of the dynamic vibration damper which concerns on this embodiment. 本実施形態に係る動吸振器の他の変形例の断面図である。It is sectional drawing of the other modification of the dynamic vibration damper which concerns on this embodiment. 床材の固有振動周波数特性と動吸振器を設置した場合の振動周波数特性を示すグラフである。It is a graph which shows the vibration frequency characteristic at the time of installing the natural vibration frequency characteristic of a flooring, and a dynamic vibration absorber. 本実施形態に係る床構造へ異なる吸振特性を有する動吸振器を取り付けた例を示す図である。It is a figure which shows the example which attached the dynamic vibration absorber which has a different vibration absorption characteristic to the floor structure which concerns on this embodiment. 本実施形態に係る床構造へ異なる吸振特性を有する動吸振器を取り付けた例を示す図である。It is a figure which shows the example which attached the dynamic vibration absorber which has a different vibration absorption characteristic to the floor structure which concerns on this embodiment.

本発明における床支持吸振具、及び、この床支持吸振具が適用される床構造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。   An embodiment of a floor support vibration absorber according to the present invention and a floor structure to which the floor support vibration absorber is applied will be described with reference to the drawings. In addition, arrow UP in a figure shows the upward direction in a floor structure.

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。   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.

(床構造及び床支持吸振具の構成)   (Floor structure and floor support vibration absorber configuration)

図1に示されるように、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との間に、所定の間隔で複数本並べられた床支持具16、及び、動吸振器30を介在させており、床支持具16、及び、動吸振器30で構成される床支持動吸振器28の介在によって床スラブ12と上床材14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。   As shown in FIG. 1, a floor structure 10 includes a floor support 16 arranged in a plurality at a predetermined interval between a concrete floor slab 12 and an upper floor material 14 serving as a frame, and a dynamic vibration absorber. The sound absorber 30 is interposed, and a space is formed between the floor slab 12 and the upper floor material 14 by the floor support dynamic vibration absorber 28 including the floor support 16 and the dynamic vibration absorber 30. Is in a state of getting.

なお、本実施形態の上床材14は、下地パネル14Aを備えると共に、下地パネル14A上に捨張材14Bを設け、その上にさらに仕上げ材14Cを設けた積層構造となっている。ここで、仕上げ材14Cを除いた上床材14(下地パネル14A及び捨張材14B)、及び、床支持具16、動吸振器30が床下地材である。   Note that the upper flooring 14 of the present embodiment has a laminated structure in which a base panel 14A is provided, a scraping material 14B is provided on the base panel 14A, and a finishing material 14C is further provided thereon. Here, the upper floor material 14 (the base panel 14A and the stripping material 14B) excluding the finishing material 14C, the floor support 16, and the dynamic vibration absorber 30 are the floor base materials.

なお、捨張材14Bは、必ずしも必要ではなく、捨張材14Bを除いた構成とすることもできる。   In addition, the discarding material 14B is not necessarily required, and may be configured without the discarding material 14B.

図2には、下地パネル14Aと、床支持具16及び動吸振器30の配置図が示されている。下地パネル14Aは、各々、所定間隔の隙間(以下「目地Mという」)が構成されるように敷設されている。目地Mは、下地パネル14A同士の接触による軋み音などを防止するために、10mm〜20mm程度の間隔が設けられている。床支持具16は、目地Mを跨ぐようにして配置されている。動吸振器30は、図2(A)に示すように、下地パネル14Aの短手方向の中央部で床支持具16の中間部に所定間隔で配置してもよいし、図2(B)に示すように、短手方向の両端部で床支持具16の近傍に所定間隔で配置してもよい。   FIG. 2 shows a layout of the base panel 14A, the floor support 16 and the dynamic vibration absorber 30. Each of the base panels 14A is laid so that a gap having a predetermined interval (hereinafter referred to as “joint M”) is formed. The joint M is provided with an interval of about 10 mm to 20 mm in order to prevent a squeaking noise caused by contact between the base panels 14A. The floor support 16 is disposed so as to straddle the joint M. As shown in FIG. 2 (A), the dynamic vibration absorber 30 may be arranged at a predetermined interval in the middle portion of the floor support 16 at the center portion in the short direction of the base panel 14A. As shown in FIG. 4, the both ends in the short direction may be arranged in the vicinity of the floor support 16 at a predetermined interval.

図3に示されるように、床支持具16は、第1弾性部材としてのクッションゴム18、支持部材としての支持ボルト22、及び、支持パネル15を備えている。   As shown in FIG. 3, the floor support 16 includes a cushion rubber 18 as a first elastic member, a support bolt 22 as a support member, and a support panel 15.

クッションゴム18は、床スラブ12上に配置されている。クッションゴム18は、円筒状とされており、上床材14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。   The cushion rubber 18 is disposed on the floor slab 12. The cushion rubber 18 has a cylindrical shape, and is supported on the floor slab 12 in order to attenuate the vibration from the upper floor material 14, 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.

下地パネル14Aの下側には、下地パネル14Aを支持するように、所定間隔で目地Mを跨いで支持パネル15が配置されている。支持パネル15は正方形板状とされ、中央部に調整孔15Aが構成されている。   Under the base panel 14A, a support panel 15 is disposed across the joint M at predetermined intervals so as to support the base panel 14A. The support panel 15 has a square plate shape, and an adjustment hole 15A is formed at the center.

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、上端部が支持パネル15の調整孔15Aに取り付けられている。支持ボルト22は、支持パネル15を介して上床材14を支持するようになっている。パネル受け部材24は、円筒状の円筒部24Bと、円筒部24Bの一方の開口部から外側へ向けて突き出した鍔部24Aを備える。パネル受け部材24の円筒部24Bは、支持パネル15の調整孔15A内に挿入されて固着され、鍔部24Aの上面(上床材14側へ向けられた面)が支持パネル15の下面(床スラブ12と対向する側の面)に固着される。パネル受け部材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、上床材14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 the upper end portion is attached to the adjustment hole 15 </ b> A of the support panel 15. The support bolts 22 are configured to support the upper flooring 14 via the support panel 15. The panel receiving member 24 includes a cylindrical cylindrical portion 24B and a flange portion 24A protruding outward from one opening of the cylindrical portion 24B. The cylindrical portion 24B of the panel receiving member 24 is inserted and fixed in the adjustment hole 15A of the support panel 15, and the upper surface (surface directed toward the upper flooring 14) of the flange portion 24A is the lower surface (floor slab) of the support panel 15. 12). A female screw portion 24C is formed on the inner peripheral surface of the cylindrical portion of the panel 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 upper flooring 14 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凹部(図示省略)が形成されており、上床材14の下地パネル14Aに捨張材14B、仕上げ材14Cが敷設さ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の凹部(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からの下地パネル14Aの高さを調節することができるようになっている。   A concave portion (not shown) for inserting a flathead screwdriver is formed at the tip of the support bolt 22, and in a state before the stripping material 14 </ b> B and the finishing material 14 </ b> C are laid on the base panel 14 </ b> A of the upper floor material 14. The height of the base panel 14A from the floor slab 12 can be adjusted by inserting a flathead screwdriver into a recess (not shown) of the support bolt 22 and rotating the support bolt 22.

図3及び図4に示すように、動吸振器30は、梁部材32、取付部材34、及び、質量体40を備えている。   As shown in FIGS. 3 and 4, the dynamic vibration absorber 30 includes a beam member 32, a mounting member 34, and a mass body 40.

取付部材34は、床下取付部34A、下延出部34B、及び、梁支持部34Cを有している。床下取付部34Aは、板状とされ、ねじ35によって下地パネル14Aに固定されている。下延出部34Bは床下取付部34Aの下面に固定され、床下取付部34Aから床スラブ12へ向かって下側に延びている。梁支持部34Cは、下延出部34Bの先端部に固定され、水平方向に梁部材32を挟み込む挟持部32Dが構成されている。   The attachment member 34 has an underfloor attachment portion 34A, a lower extension portion 34B, and a beam support portion 34C. The underfloor mounting portion 34A has a plate shape and is fixed to the base panel 14A with screws 35. The lower extending portion 34B is fixed to the lower surface of the underfloor mounting portion 34A, and extends downward from the underfloor mounting portion 34A toward the floor slab 12. The beam support portion 34C is fixed to the distal end portion of the lower extension portion 34B, and a sandwiching portion 32D that sandwiches the beam member 32 in the horizontal direction is configured.

梁部材32は、長尺板状とされ、弾性変形可能とされている。梁部材32としては、バネ鋼、FRP、CFRP、等のばね部材を用いることができる。また、本実施形態では、梁部材32の断面は長方形板状のものを用いているが、他の断面、例えば、円形断面、円筒断面、方形断面のものも用いることができる。   The beam member 32 has a long plate shape and is elastically deformable. As the beam member 32, a spring member such as spring steel, FRP, or CFRP can be used. In the present embodiment, the beam member 32 has a rectangular plate-shaped cross section, but other cross sections such as a circular cross section, a cylindrical cross section, and a rectangular cross section can also be used.

梁部材32は、取付部材34の挟持部32Dに挿入されて挟み込まれた状態で接着され、中間部32Mで取付部材34に支持されている。梁部材32は、下地パネル14Aと距離δをもって、下地パネル14Aの下面に沿った方向に配置されている。距離δは、質量体40の上下変形量と質量体40の上側厚みS(梁部材32の上面から質量体40の上面までの厚み)以上の寸法とされている。この距離δは、下延出部34Bにより、確保されている。梁部材32の両方の先端部32Aには、取付孔32Hが構成されている。   The beam member 32 is inserted into the sandwiching portion 32D of the attachment member 34 and bonded thereto, and is supported by the attachment member 34 at the intermediate portion 32M. The beam member 32 is disposed in a direction along the lower surface of the base panel 14A with a distance δ from the base panel 14A. The distance δ is set to a dimension equal to or larger than the vertical deformation amount of the mass body 40 and the upper thickness S of the mass body 40 (the thickness from the upper surface of the beam member 32 to the upper surface of the mass body 40). This distance δ is secured by the lower extension 34B. An attachment hole 32 </ b> H is formed at both tip portions 32 </ b> A of the beam member 32.

梁部材32の先端部32Aには、質量体40が取り付けられている。質量体40は、直方体状とされ、挿通穴40Hが構成されている。また、質量体40には、挿通穴40Hの中央部と連通すると共に質量体40を貫通するねじ穴40Nが構成されている。ねじ穴40Nには、ねじ42が挿通され、ねじ42が挿通出口側に突出された部分にナット43で締結されている。   A mass body 40 is attached to the distal end portion 32 </ b> A of the beam member 32. The mass body 40 has a rectangular parallelepiped shape, and an insertion hole 40H is formed. Further, the mass body 40 includes a screw hole 40N that communicates with the central portion of the insertion hole 40H and penetrates the mass body 40. A screw 42 is inserted into the screw hole 40N, and the screw 42 is fastened with a nut 43 to a portion protruding to the insertion outlet side.

質量体40は、挿通穴40Hに、梁部材32の先端部32Aが挿入され、取付孔32Hにねじ42を挿入して逆側からナット43を締結することにより、梁部材32の先端部32Aに取り付けられる。   In the mass body 40, the distal end portion 32A of the beam member 32 is inserted into the insertion hole 40H, the screw 42 is inserted into the mounting hole 32H, and the nut 43 is fastened from the opposite side, whereby the distal end portion 32A of the beam member 32 is attached. It is attached.

ここで、中間部32Mと質量体40との距離Lは、動吸振器30が上床材14の固有振動周波数に対応するように調整されている。すなわち、梁部材32のヤング率、幅、厚み、質量体40の質量、及び、距離Lに依存する設計固有値により決定される。梁部材32は、梁部材32のヤング率、厚み、幅、距離Lを変えることにより、バネ定数を容易に変えることができる。   Here, the distance L between the intermediate portion 32M and the mass body 40 is adjusted so that the dynamic vibration absorber 30 corresponds to the natural vibration frequency of the upper flooring 14. That is, it is determined by the design eigenvalue depending on the Young's modulus, width, thickness of the beam member 32, the mass of the mass body 40, and the distance L. The spring constant of the beam member 32 can be easily changed by changing the Young's modulus, thickness, width, and distance L of the beam member 32.

また、質量体40としては、比重の高い材料を用いると、質量体40をコンパクトに構成することができる。質量体40は、鋼材、金属、水、砂、セラミック、樹脂などの材料で構成することができる。   Moreover, as the mass body 40, if a material with high specific gravity is used, the mass body 40 can be comprised compactly. The mass body 40 can be made of a material such as steel, metal, water, sand, ceramic, or resin.

質量体40は、図5に示すように。梁部材32からの振動を吸収するように上下動することで、上床材14から床スラブへの振動を減衰する。動吸振器30と床スラブ12との間には、所定のクリアランスCが構成され、これにより、質量体40が上下に振動する場合でも、その下端が床スラブ12と接触しないようになっている。   The mass body 40 is as shown in FIG. By moving up and down so as to absorb the vibration from the beam member 32, the vibration from the upper floor material 14 to the floor slab is attenuated. A predetermined clearance C is formed between the dynamic vibration absorber 30 and the floor slab 12, so that even when the mass body 40 vibrates up and down, its lower end does not come into contact with the floor slab 12. .

(作用)   (Function)

次に、上記の実施形態の作用を説明する。   Next, the operation of the above embodiment will be described.

上階で発せられた床衝撃音(例えば、歩行音等)の振動は、上床材14から、支持パネル15、支持ボルト22、中間受け部材20を介してクッションゴム18へ伝わり、クッションゴム18で減衰されながら床スラブ12へ伝わる。このとき、動吸振器30の質量体40が、梁部材32を介して上床材14の振動を打ち消すように上下方向に振動する(図4参照)。これにより、クッションゴム18へ伝わる振動が減衰され、上床材14から床スラブ12へ伝わる振動を低減させることができる。   The vibration of floor impact sound (for example, walking sound) generated on the upper floor is transmitted from the upper floor material 14 to the cushion rubber 18 via the support panel 15, the support bolt 22, and the intermediate receiving member 20. It is transmitted to the floor slab 12 while being attenuated. At this time, the mass body 40 of the dynamic vibration absorber 30 vibrates in the vertical direction so as to cancel the vibration of the upper flooring 14 via the beam member 32 (see FIG. 4). Thereby, the vibration transmitted to the cushion rubber 18 is attenuated, and the vibration transmitted from the upper floor material 14 to the floor slab 12 can be reduced.

本実施形態では、動吸振器30が床支持具16と分離して配置されているので、動吸振器30が床支持具16と直列的に配置されている場合と比較して、床支持動吸振器28の高さを低くすることができる。したがって、上床材14の下面と床スラブ12との間の距離が短い低床にも設置することができる。   In the present embodiment, since the dynamic vibration absorber 30 is disposed separately from the floor support 16, the floor vibration is reduced compared to the case where the dynamic vibration absorber 30 is disposed in series with the floor support 16. The height of the vibration absorber 28 can be reduced. Therefore, it can also be installed on a low floor where the distance between the lower surface of the upper flooring 14 and the floor slab 12 is short.

また、本実施形態では、質量体40を梁部材32の先端部32Aに取り付けているので、梁部材32の動きを無駄に規制することなく効率よく自由振動をさせることができる、また、容易に質量体40の取り付け、取り外しを行うことができる。したがって、動吸振器30を上床材14へ取り付けた後に、質量の異なる質量体40に取り替えて、上床材14の固有振動数に対応させることもできる。   In the present embodiment, since the mass body 40 is attached to the distal end portion 32A of the beam member 32, free vibration can be efficiently performed without wastefully regulating the movement of the beam member 32, and easily. The mass body 40 can be attached and detached. Therefore, after attaching the dynamic vibration absorber 30 to the upper flooring 14, the dynamic vibration absorber 30 can be replaced with a mass body 40 having a different mass to correspond to the natural frequency of the upper flooring 14.

なお、図3で示されている動吸振器30では、梁部材32の中間部32Mから質量体40までの距離Lは、左右で同距離となっているが、距離Lは、図6に示すように、左右で異なる距離L1、L2としてもよい。また、質量体40についても、左右で異なる質量にしてもよい。異なる距離L1、L2としたり、異なる質量としたりすることにより、複数の固有振動周波数に対応した動吸振器30を構成することができる。   In the dynamic vibration absorber 30 shown in FIG. 3, the distance L from the intermediate portion 32M of the beam member 32 to the mass body 40 is the same on the left and right, but the distance L is shown in FIG. Thus, it is good also as the distance L1 and L2 which differ on right and left. Also, the mass body 40 may have different masses on the left and right. By using different distances L1 and L2 or different masses, the dynamic vibration absorber 30 corresponding to a plurality of natural vibration frequencies can be configured.

また、本実施形態では、梁部材32に取付孔32Hを構成し、質量体40のねじ穴40Nに挿通されたねじ42を取付穴32にも挿通させて、質量体40を梁部材32へ取り付けたが、質量体40は、他の手段により梁部材32に取り付けてもよい。   Further, in the present embodiment, the mounting hole 32H is formed in the beam member 32, the screw 42 inserted through the screw hole 40N of the mass body 40 is also inserted into the mounting hole 32, and the mass body 40 is attached to the beam member 32. However, the mass body 40 may be attached to the beam member 32 by other means.

例えば、図7に示すように、ねじ穴40Nを構成せず、単に挿通穴40Hに梁部材32を挿入して、接着剤などで固定することもできる。また、図8に示すように、質量体40の挿通穴40Hを貫通穴とし、ねじ穴40Nを挿通穴40Hよりも上側のみに構成すると共に、ねじ穴40Nの内壁にねじ43と螺合可能な雌ネジを構成する。そして、ねじ43をねじ穴40Nにねじ込んで、ねじ43の先端で梁部材32を押さえることにより、取り付けることができる。この構成によれば、質量体40を梁部材32に沿ってスライド移動させて、容易に距離Lを変えることができる。   For example, as shown in FIG. 7, the screw hole 40N is not formed, and the beam member 32 can be simply inserted into the insertion hole 40H and fixed with an adhesive or the like. Further, as shown in FIG. 8, the insertion hole 40H of the mass body 40 is a through hole, the screw hole 40N is configured only above the insertion hole 40H, and can be screwed onto the inner wall of the screw hole 40N with the screw 43. Configure female thread. And it can attach by screwing the screw 43 in the screw hole 40N, and pressing the beam member 32 with the front-end | tip of the screw 43. FIG. According to this configuration, the distance L can be easily changed by sliding the mass body 40 along the beam member 32.

また、本実施形態では、梁部材32の中間部Mを取付部材34に固定して、梁部材32の両端に質量体40を取り付けたが、図9に示すように、梁部材32の一端を取付部材34に固定して、一方の先端部32Aにのみ質量体40を取り付けてもよい。   Further, in this embodiment, the intermediate portion M of the beam member 32 is fixed to the attachment member 34, and the mass body 40 is attached to both ends of the beam member 32. However, as shown in FIG. The mass body 40 may be attached only to the one end portion 32A by being fixed to the attachment member 34.

また、梁部材32の一端を構成する先端部32Aに質量体40を取り付け、他端を梁支持部34Cに取り付けて、図10に示すように梁部材32を3本とすることも、図11に示すように梁部材32を4本とすることもできる。この場合にも、取付部材34から各々の質量体40までの距離L1〜L4や、各質量体40の質量を上床材14の固定振動周波数に応じで設定することができる。   Further, the mass body 40 is attached to the tip end portion 32A constituting one end of the beam member 32 and the other end is attached to the beam support portion 34C, so that the number of the beam members 32 is three as shown in FIG. As shown, the number of beam members 32 may be four. Also in this case, the distances L1 to L4 from the mounting member 34 to each mass body 40 and the mass of each mass body 40 can be set according to the fixed vibration frequency of the upper flooring 14.

また、図12に示すように、1本の梁部材32を、複数の取付部材34(図12では2つの取付部材34)で支持する構成とすることもできる。   Further, as shown in FIG. 12, one beam member 32 may be supported by a plurality of attachment members 34 (two attachment members 34 in FIG. 12).

また、図13に示すように、梁部材32の上下面に、減衰部材50を接着してもよい。減衰部材50としては、粘弾性変形するものであれば、あらゆる部材を用いることができる、例えば、ゴム部材や、発泡体を用いることができる。減衰部材50を設けることにより、梁部材32の弾性変形時に減衰部材50が粘弾性変形し、振動が吸収される。これにより、対象周波数範囲を拡大することができる。すなわち、例えば、図14に示すように、上床材14の固有振動周波数特性がグラフ中のF0で表されるとした場合、この固有振動周波数特性に対応した梁部材32及び質量体40(減衰部材なし)を設置すると、グラフ中のF1のように周波数ピークが分散する。そして、さらに減衰部材50を設けることにより、グラフ中のF2に示すように、F1のピークが削られる特性となり、効果的に振動を減衰させることができる。   Further, as shown in FIG. 13, the attenuation member 50 may be bonded to the upper and lower surfaces of the beam member 32. Any member can be used as the damping member 50 as long as it is viscoelastically deformed. For example, a rubber member or a foam can be used. By providing the damping member 50, the damping member 50 is viscoelastically deformed when the beam member 32 is elastically deformed, and vibration is absorbed. Thereby, the target frequency range can be expanded. That is, for example, as shown in FIG. 14, when the natural vibration frequency characteristic of the upper flooring 14 is represented by F0 in the graph, the beam member 32 and the mass body 40 (damping member) corresponding to this natural vibration frequency characteristic are used. When (None) is installed, frequency peaks are dispersed like F1 in the graph. Further, by providing the damping member 50, as indicated by F2 in the graph, the peak of F1 is removed, and vibration can be effectively damped.

また、異なる固有振動特性の動吸振器30を、同一の上床材14に取り付けてもよい。例えば、図15には、距離Lを異にする(L1<L2)動吸振器30が取り付けられた例が示され、図16には、質量体40の質量Wが異なる(W1<W2)動吸振器30が取り付けられた例が示されている。このように、異なる固有振動特性の動吸振器30を、同一の上床材14に取り付けることにより、上床材14の有する異なる周波数帯域の振動を減衰させることができる。   In addition, dynamic vibration absorbers 30 having different natural vibration characteristics may be attached to the same upper flooring 14. For example, FIG. 15 shows an example in which the dynamic vibration absorber 30 with a different distance L (L1 <L2) is attached, and FIG. 16 shows a motion with a different mass W of the mass body 40 (W1 <W2). An example in which the vibration absorber 30 is attached is shown. In this way, by attaching the dynamic vibration absorbers 30 having different natural vibration characteristics to the same upper floor material 14, vibrations in different frequency bands of the upper floor material 14 can be attenuated.

10 床構造
12 床スラブ
14 上床材
16 床支持具
18 クッションゴム
22 支持ボルト
28 床支持動吸振器
30 動吸振器
32A 先端部
32M 中間部
32 梁部材
34 取付部材
40 質量体
40H 挿通穴
L 距離
DESCRIPTION OF SYMBOLS 10 Floor structure 12 Floor slab 14 Upper floor material 16 Floor support 18 Cushion rubber 22 Support bolt 28 Floor support dynamic vibration absorber 30 Dynamic vibration absorber 32A Tip part 32M Intermediate part 32 Beam member 34 Mounting member 40 Mass body 40H Insertion hole L Distance

Claims (3)

床スラブ上に配置され、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、前記床スラブとの間に間隔をもって配置される床材を支持する支持部材と、
前記支持部材と離間した位置で前記床材の下面側に固定され、前記床材から前記床スラブへ向かう方向に延びる取付部材と、
前記床材と間隔をあけて前記床材の下面に沿って配置され、前記取付部材に支持された弾性変形可能な梁部材と、
前記梁部材の先端部に取り付けられ、前記梁部材の弾性変形によって変位して振動を減衰させる質量体と、
前記梁部材の前記取付部材に支持された支持部と前記先端部との間に配置された、粘弾性変形可能な減衰部材と、
を備えた、床支持吸振具。
A first elastic member disposed on the floor slab and elastically deformable to damp vibrations;
A support member that is supported on the first elastic member and supports a flooring that is disposed with a gap between the floor slab;
An attachment member that is fixed to the lower surface side of the flooring at a position separated from the support member, and extends in a direction from the flooring to the floor slab;
An elastically deformable beam member disposed along the lower surface of the flooring at an interval from the flooring and supported by the mounting member;
A mass body attached to the tip of the beam member and damped by displacement by elastic deformation of the beam member;
A damping member capable of viscoelastic deformation, disposed between a support portion supported by the mounting member of the beam member and the tip portion;
A floor support vibration absorber.
前記梁部材は中間部で前記取付部材に支持され、前記中間部から両側に延びる先端部の各々に前記質量体が取り付けられていること、を特徴とする請求項1に記載の床支持吸振具。   The floor-supporting vibration absorber according to claim 1, wherein the beam member is supported by the attachment member at an intermediate portion, and the mass body is attached to each of tip portions extending from the intermediate portion to both sides. . 床スラブと、
前記床スラブと間隔をもって配置される床材と、
請求項1又は2に記載の床支持吸振具と、
を備えた床構造。
Floor slabs,
A flooring disposed at an interval from the floor slab;
The floor-supporting vibration absorber according to claim 1 or 2 ,
With floor structure.
JP2009045898A 2009-02-27 2009-02-27 Floor support vibration absorber and floor structure Expired - Fee Related JP5399096B2 (en)

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