JP2012202107A - Vibration isolating device for building floor and floor structure of building - Google Patents
Vibration isolating device for building floor and floor structure of building Download PDFInfo
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- 239000000463 material Substances 0.000 claims abstract description 45
- 230000002093 peripheral effect Effects 0.000 claims abstract description 41
- 230000000630 rising effect Effects 0.000 claims abstract description 19
- 238000009408 flooring Methods 0.000 claims description 26
- 238000002955 isolation Methods 0.000 abstract description 8
- 238000009434 installation Methods 0.000 abstract description 5
- 230000000052 comparative effect Effects 0.000 description 7
- 238000013016 damping Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
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Abstract
Description
この発明は、建物床用の防振装置及びこれを使用した建物の床構造に関する。 The present invention relates to a vibration isolator for a building floor and a building floor structure using the same.
従来より、住宅やマンション等の建物において、上層階から下層階へ伝搬する床衝撃音を低減するための対策として、例えば床材の重量を重くするといった方法が採られている。しかしながら、この場合、多大な重量付加を伴って構造躯体に大きな負担をかけることになる。 Conventionally, in a building such as a house or a condominium, as a measure for reducing floor impact sound propagating from an upper floor to a lower floor, for example, a method of increasing the weight of the floor material has been adopted. However, in this case, a great burden is imposed on the structural frame with a great deal of weight.
そこで、床梁と床材との間に防振ゴムを介在させて、床材を防振支持することで、構造躯体に大きな負担をかけることなく、床衝撃音を低減するようにした床構造が各種提案されている。ところが、このような床構造においては、防振ゴムが鉛直方向に変形するだけでなく水平方向にも変形することから、床材は鉛直方向及び水平方向に揺れ易くなっている。この場合、床材の水平剛性を高めて水平ブレースを廃止しようとしても、床材によって水平力を負担することは困難となるため、水平ブレースの廃止によるコストダウンを図ることはできなかった。 Therefore, the floor structure is designed to reduce floor impact noise without placing a heavy burden on the structural frame by supporting the flooring with vibration isolation by interposing an anti-vibration rubber between the floor beam and the flooring. Various proposals have been made. However, in such a floor structure, the anti-vibration rubber is not only deformed in the vertical direction but also deformed in the horizontal direction, so that the flooring material is easily shaken in the vertical direction and the horizontal direction. In this case, even if an attempt is made to abolish the horizontal brace by increasing the horizontal rigidity of the flooring material, it is difficult to bear the horizontal force by the flooring material, and therefore it has not been possible to reduce the cost by eliminating the horizontal brace.
近年、例えば特許文献1〜3にも開示されているように、主として鉛直方向の振動を効果的に減衰するとともに、水平方向に対しては剛性を有する防振装置が提案されている。この種の防振装置においては、径の異なる複数の筒状剛性体と径の異なる複数の筒状弾性体とを、それら中心軸が鉛直方向に沿うように交互に積層一体化した防振材を備え、鉛直方向に変形し易くなっていて、水平方向には変形し難くなっている。このような防振装置を、住宅やマンション等の建物における床部に適用すれば、床衝撃音の低減を図りながらも、床材によって水平力を負担することが可能になって、水平ブレースの廃止によるコストダウンを実現することができる。 In recent years, for example, as disclosed in Patent Documents 1 to 3, a vibration isolator has been proposed that effectively attenuates mainly vibration in the vertical direction and has rigidity in the horizontal direction. In this type of vibration isolator, a plurality of cylindrical rigid bodies having different diameters and a plurality of cylindrical elastic bodies having different diameters are laminated and integrated alternately so that their central axes are along the vertical direction. It is easy to deform in the vertical direction, and difficult to deform in the horizontal direction. If such a vibration isolator is applied to the floor of a building such as a house or apartment, it will be possible to bear the horizontal force by the floor material while reducing the floor impact noise, and the horizontal brace Cost reduction by abolition can be realized.
しかしながら、上記のような防振装置においては、住宅やマンション等の建物における床部に有効に適用するための配慮、すなわち、装置の高さをできるだけ低く抑えるといった配慮は十分になされておらず、大型化を招き易い構造となっているものが多い。このため、このような防振装置を、住宅やマンション等の建物における床部にそのまま適用した場合(具体的には、床梁と床材との間に介在させた場合)、床レベルが高くなってしまうといった不具合があった。 However, in the vibration isolator as described above, consideration for effectively applying to the floor in a building such as a house or an apartment, that is, consideration to keep the height of the device as low as possible has not been made sufficiently, Many of them have structures that are likely to increase in size. For this reason, when such a vibration isolator is applied as it is to the floor of a building such as a house or apartment (specifically, when it is interposed between the floor beam and the flooring), the floor level is high. There was a problem of becoming.
この発明は、上記の不具合を解消して、床衝撃音の低減を図りながらも、水平ブレースの廃止によるコストダウンを実現でき、しかも床梁と床材との間にコンパクトに介在させて床レベルを低く抑えることができる建物床用の防振装置及びこれを使用した建物の床構造の提供を目的とする。 The present invention eliminates the above problems and reduces floor impact noise, while realizing cost reduction by eliminating horizontal braces, and is compactly interposed between the floor beam and the flooring material. An object of the present invention is to provide a vibration isolator for a building floor that can keep the noise level low, and a building floor structure using the same.
上記課題を解決するため、この発明の建物床用の防振装置1は、床梁2と床材3との間に介在されるものであって、前記床梁2に固定する下側の固定台10と、前記床材3を設置する上側の可動台20と、これら固定台10と可動台20との間に介装した防振材30とを備え、前記防振材30は、径の異なる複数の筒状剛性体31・・と径の異なる複数の筒状弾性体32・・とを、それら中心軸が鉛直方向に沿うように交互に積層一体化してなり、前記防振材30の中央孔部35の内周面を、前記固定台10の立ち上がり軸部12の外周面に接合固定するとともに、前記防振材30の外周面を、前記立ち上がり軸部12を囲む前記可動台20の垂下枠部22の内周面に接合固定することで、前記固定台10に対して前記可動台20を上下動可能に防振支持し、前記床材3の設置前の初期状態において、前記防振材30の上面30a及び下面30bを前記中央孔部35の内周面から外周面に向かって上り傾斜させたことを特徴とする。 In order to solve the above problems, a vibration isolator 1 for a building floor according to the present invention is interposed between a floor beam 2 and a floor material 3 and is fixed on the lower side to be fixed to the floor beam 2. A base 10, an upper movable base 20 on which the flooring 3 is installed, and a vibration isolating material 30 interposed between the fixed base 10 and the movable base 20. A plurality of different cylindrical rigid bodies 31... And a plurality of cylindrical elastic bodies 32... Having different diameters are alternately laminated and integrated so that their central axes are along the vertical direction. The inner peripheral surface of the central hole 35 is bonded and fixed to the outer peripheral surface of the rising shaft portion 12 of the fixed base 10, and the outer peripheral surface of the vibration isolator 30 is fixed to the movable base 20 surrounding the rising shaft portion 12. The movable base 20 can be moved up and down with respect to the fixed base 10 by being bonded and fixed to the inner peripheral surface of the hanging frame portion 22. In the initial state before installation of the flooring 3, the upper surface 30a and the lower surface 30b of the vibration isolating material 30 are inclined upward from the inner peripheral surface of the central hole 35 toward the outer peripheral surface. It is characterized by.
また、前記可動台20は、前記床材3を載置する載置プレート21を備え、この載置プレート21に、前記可動台20の下動時における前記固定台10の立ち上がり軸部12及び前記防振材30との干渉を避けるための逃がし孔21aを形成して、前記載置プレート21の逃がし孔21a周りから前記垂下枠部22を垂下させている。 The movable table 20 includes a mounting plate 21 on which the flooring 3 is mounted, and the mounting plate 21 includes the rising shaft portion 12 of the fixed table 10 and the shaft 12 when the movable table 20 moves downward. An escape hole 21a for avoiding interference with the vibration isolator 30 is formed, and the hanging frame portion 22 is suspended from around the escape hole 21a of the mounting plate 21 described above.
さらに、前記筒状弾性体32・・の上端部同士を上面弾性体33によって一体的に連結して、前記筒状剛性体31・・の上端部を前記上面弾性体33によって覆い隠すとともに、前記筒状弾性体32・・の下端部同士を下面弾性体34によって一体的に連結して、前記筒状剛性体31・・の下端部を前記下面弾性体34によって覆い隠すようにしている。 Further, the upper end portions of the cylindrical elastic bodies 32... Are integrally connected by the upper surface elastic body 33, and the upper end portions of the cylindrical rigid bodies 31. The lower ends of the cylindrical elastic bodies 32... Are integrally connected by a lower surface elastic body 34 so that the lower ends of the cylindrical rigid bodies 31.
この発明の建物の床構造は、上記の防振装置1を、床梁2と床材3との間に介在させたことを特徴とする。 The floor structure of a building according to the present invention is characterized in that the vibration isolator 1 is interposed between a floor beam 2 and a floor material 3.
この発明の防振装置を適用した床構造においては、床材で発生した床衝撃音を伴う振動を、防振材の剪断変形によって減衰して、床衝撃音を低減することができる。しかも、防振材において、径の異なる複数の筒状剛性体がその中心軸を鉛直方向に沿わせるように水平方向に間隔をあけて配置されているので、防振装置は、水平方向に対して高い剛性を有している。このため、床材によって水平力を負担することが可能になって、水平ブレースの廃止によるコストダウンを実現することができる。 In the floor structure to which the vibration isolator of the present invention is applied, the vibration accompanied by the floor impact sound generated in the floor material can be attenuated by the shear deformation of the vibration isolator, and the floor impact sound can be reduced. In addition, in the vibration isolator, the plurality of cylindrical rigid bodies having different diameters are arranged at intervals in the horizontal direction so that the central axis thereof is along the vertical direction. And has high rigidity. For this reason, it becomes possible to bear the horizontal force by the flooring material, and it is possible to realize cost reduction by eliminating the horizontal brace.
さらに、防振装置は、床材の設置前の初期状態において、防振材の上面及び下面が内周部分から外周部分に向かって上り傾斜していることから、可動台に床材を設置した使用状態において、防振材の上面及び下面を略水平な状態にすることが可能となる。これによって、防振装置の高さを低く抑えることができ、床梁と床材との間にコンパクトに介在させて床レベルを低く抑えることができる。加えて、床材を設置した使用状態において、防振材の上面及び下面が略水平な状態(防振材の内周部分と外周部分が上下方向に位置ずれしていない状態)になっていると、防振材の内周部分と外周部分が上下方向に位置ずれした状態となっている場合と比べて、防振材が水平方向に対して変形し難くなって、水平方向に対する剛性を安定して高めることができる。 Furthermore, in the initial state before installation of the flooring material, the vibration isolator is installed on the movable base because the upper and lower surfaces of the vibration damping material are inclined upward from the inner peripheral part toward the outer peripheral part. In the state of use, the upper and lower surfaces of the vibration isolator can be made substantially horizontal. Thereby, the height of the vibration isolator can be kept low, and the floor level can be kept low by being compactly interposed between the floor beam and the floor material. In addition, when the flooring is installed, the top and bottom surfaces of the vibration isolator are substantially horizontal (the inner peripheral portion and the outer peripheral portion of the vibration isolator are not displaced in the vertical direction). Compared to the case where the inner and outer peripheral parts of the anti-vibration material are displaced in the vertical direction, the anti-vibration material is less likely to deform in the horizontal direction and the rigidity in the horizontal direction is stable. Can be increased.
また、可動台の載置プレートに逃がし孔を形成して、可動台の下動時に、載置プレートが固定台の立ち上がり軸部及び防振材に干渉しないようにすることで、逃がし孔を形成していない場合と比べて、載置プレートの高さ位置を低くすることができ、これにより防振装置の高さを一段と低く抑えることができる。 In addition, an escape hole is formed in the mounting plate of the movable table so that the mounting plate does not interfere with the rising shaft portion of the fixed table and the vibration isolator when the movable table is moved downward. Compared with the case where it is not, the height position of a mounting plate can be made low and, thereby, the height of a vibration isolator can be suppressed further low.
さらに、防振材において、筒状剛性体の上端部及び下端部を、筒状弾性体と一体となった上面弾性体及び下面弾性体によって覆い隠すことで、筒状剛性体と筒状弾性体との重合部分での位置ずれや剥離等を抑制することができ、防振材の耐久性の向上を図ることができる。 Further, in the vibration isolator, the cylindrical rigid body and the cylindrical elastic body are covered by the upper and lower elastic bodies integrated with the cylindrical elastic body at the upper end and the lower end of the cylindrical rigid body. Misalignment and peeling at the polymerized portion can be suppressed, and the durability of the vibration isolator can be improved.
以下、この発明の実施形態を図面に基づいて詳細に説明する。この発明の一実施形態に係る防振装置1は、図1及び図2に示すように、戸建住宅や集合住宅の上層階の床部に適用されるもので、床梁2と床材3との間に介在されて、床材3を防振支持することで、床材3で発生した床衝撃音を伴う鉛直方向の振動を効果的に減衰するようになっている。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 and 2, a vibration isolator 1 according to an embodiment of the present invention is applied to a floor portion of an upper floor of a detached house or an apartment house, and includes a floor beam 2 and a floor material 3. The vibration in the vertical direction accompanied by the floor impact sound generated in the floor material 3 is effectively damped by supporting the floor material 3 in an anti-vibration manner.
なお、床梁2は、例えばH形鋼からなり、そのフランジ2a、2aが上下平行になるように配されている。床材3は、例えば水平剛性を高めた複数の方形状の床パネル4・・を並設することによって構成されている。 The floor beam 2 is made of, for example, H-shaped steel, and the flanges 2a and 2a are arranged so as to be parallel in the vertical direction. The flooring 3 is configured by, for example, arranging a plurality of rectangular floor panels 4... With increased horizontal rigidity.
防振装置1は、図3に示すように、床梁2に固定する下側の金属製の固定台10と、床材3を設置する上側の金属製の可動台20と、これら固定台10と可動台20のとの間に介装した防振材30とを備えている。 As shown in FIG. 3, the vibration isolator 1 includes a lower metal fixed base 10 that is fixed to the floor beam 2, an upper metal movable base 20 on which the flooring 3 is installed, and the fixed base 10. And a vibration isolator 30 interposed between the movable table 20 and the movable table 20.
固定台10は、図3乃至図5に示すように、床梁2の上側フランジ2aの上面に載置された状態で、ボルト5・・及びナット6・・によって上側フランジ2aに固定される略正方形状の固定プレート11と、この固定プレート11の中央部に形成された略円形の貫通孔11a周りから立ち上がった略円筒状の立ち上がり軸部12とから構成されている。なお、固定プレート11の一辺の長さは約100mmとされ、貫通孔11aの直径は約20mmとされている。 As shown in FIGS. 3 to 5, the fixing base 10 is substantially fixed to the upper flange 2 a by bolts 5 and nuts 6 while being placed on the upper surface of the upper flange 2 a of the floor beam 2. The fixed plate 11 has a square shape, and a substantially cylindrical rising shaft portion 12 that rises from the periphery of a substantially circular through-hole 11 a formed at the center of the fixed plate 11. The length of one side of the fixed plate 11 is about 100 mm, and the diameter of the through hole 11a is about 20 mm.
可動台20は、図3乃至図5に示すように、床材3の床パネル4・・の角部が載置されて、これら角部が図示しない止め付け具によって止め付けられる略正方形状の載置プレート21と、固定台10の立ち上がり軸部12を囲むようにして、載置プレート21の中央部に形成された略円形の逃がし孔21a周りから垂下した垂下枠部22とから構成されている。なお、載置プレート21には、その逃がし孔21aを囲むようにして、載置プレート21に床パネル4・・の角部を止め付けるるための複数の止め付け孔21b・・が形成されている。また、載置プレート21の一辺の長さは約100mmとされ、逃がし孔21aの直径は約60mmとされている。 As shown in FIGS. 3 to 5, the movable base 20 has a substantially square shape in which corners of the floor panel 4 of the flooring 3 are placed and these corners are fastened by a fastening tool (not shown). The mounting plate 21 and a hanging frame portion 22 that hangs from the periphery of a substantially circular relief hole 21 a formed in the center of the mounting plate 21 so as to surround the rising shaft portion 12 of the fixed base 10. The mounting plate 21 is formed with a plurality of fixing holes 21b... For fixing the corners of the floor panel 4 to the mounting plate 21 so as to surround the escape hole 21a. The length of one side of the mounting plate 21 is about 100 mm, and the diameter of the escape hole 21a is about 60 mm.
防振材30においては、図3乃至図5に示すように、中心軸方向の長さが同じで径の異なる薄肉円筒状に形成された複数の金属製の剛性体31・・と、中心軸方向の長さが同じで径の異なる薄肉円筒状に形成された複数のゴム製の弾性体32・・とが、それら中心軸が鉛直方向に沿うように交互に同心円状に積層一体化されている。また、円筒状弾性体32・・の上端部同士が略円環状の上面弾性体33によって一体的に連結されて、円筒状剛性体31・・の上端部が上面弾性体33によって覆い隠され、円筒状弾性体32・・の下端部同士が略円環状の下面弾性体34によって一体的に連結されて、円筒状剛性体31・・の下端部が下面弾性体34によって覆い隠されている。 In the vibration isolator 30, as shown in FIGS. 3 to 5, a plurality of metal rigid bodies 31 formed in a thin cylindrical shape having the same length in the central axis direction and different diameters, and the central axis A plurality of rubber elastic bodies 32, which are formed in a thin cylindrical shape having the same direction length and different diameters, are laminated and integrated alternately and concentrically with their central axes along the vertical direction. Yes. Further, the upper ends of the cylindrical elastic bodies 32 are integrally connected by a substantially annular upper surface elastic body 33, and the upper ends of the cylindrical rigid bodies 31 are covered by the upper surface elastic body 33, The lower ends of the cylindrical elastic bodies 32... Are integrally connected by a substantially annular lower elastic body 34, and the lower ends of the cylindrical rigid bodies 31.
すなわち、この防振材30は、外表面が弾性体32〜34によって覆われた略短円柱状に形成されていて、その中心部分には中央孔部35が上下方向に貫通して形成され、内部には鉛直方向に沿った複数の円筒状剛性体31・・が水平方向(径方向)に間隔をあけて埋設された状態となっている。 That is, the vibration isolator 30 is formed in a substantially short cylindrical shape whose outer surface is covered with elastic bodies 32 to 34, and a central hole portion 35 is formed through the center portion in the vertical direction. Inside, a plurality of cylindrical rigid bodies 31 along the vertical direction are embedded in the horizontal direction (radial direction) at intervals.
そして、防振材30の中央孔部35の内周面を、固定台10の立ち上がり軸部12の外周面に接合固定するとともに、防振材30の外周面を、可動台20の垂下枠部22の内周面に接合固定することで、防振材30が立ち上がり軸部12と垂下枠部22との間に介装されて、固定台10に対して可動台20が上下動可能に防振支持されている。なお、この介装状態において、防振材30における中央孔部35の内周面の上端が、固定台10における立ち上がり軸部12の外周面の上端付近に配置されており、防振材30における外周面の下端が、可動台20における垂下枠部22の内周面の下端付近に配置されている。 Then, the inner peripheral surface of the central hole portion 35 of the vibration isolator 30 is bonded and fixed to the outer peripheral surface of the rising shaft portion 12 of the fixed base 10, and the outer peripheral surface of the vibration isolator 30 is attached to the hanging frame portion of the movable base 20. The vibration isolator 30 is interposed between the rising shaft portion 12 and the hanging frame portion 22 so that the movable base 20 can move up and down with respect to the fixed base 10. It is supported by vibration. In this interposed state, the upper end of the inner peripheral surface of the central hole 35 in the vibration isolator 30 is disposed near the upper end of the outer peripheral surface of the rising shaft portion 12 in the fixed base 10. The lower end of the outer peripheral surface is disposed in the vicinity of the lower end of the inner peripheral surface of the hanging frame portion 22 in the movable base 20.
上記の防振装置1においては、床部への組み込み前すなわち床材3を可動台20に設置する前の初期状態において、図5に示すように、防振材30の上面30a及び下面30bが中央孔部35の内周面から外周面に向かって上り傾斜している。すなわち、床材3の設置前の初期状態においては、防振材30が、その内周部分(中央部分)よりも外周部分が上方へ迫り上がっていて、全体的に中央付近が凹んだ状態となっている。 In the vibration isolator 1, the upper surface 30a and the lower surface 30b of the vibration isolator 30 are as shown in FIG. 5 in an initial state before being installed on the floor, that is, before the floor material 3 is installed on the movable base 20. The central hole portion 35 is inclined upward from the inner peripheral surface toward the outer peripheral surface. That is, in the initial state before the flooring 3 is installed, the vibration isolator 30 has a state in which the outer peripheral portion is pushed upward from the inner peripheral portion (center portion) and the central portion is generally recessed. It has become.
これにより、防振装置1の床部への組み込み時すなわち床材3を可動台20に設置した使用状態においては、図3に示すように、床材3の荷重によって可動台20が下動して、垂下枠部22の内周面に接合固定されている防振材30の外周部分が押し下げられることで、防振材30の上面30a及び下面30bが略水平な状態となる。また、この使用状態において、固定台10の固定プレート11の上面と可動台20の垂下枠部22の下端との間、及び、可動台20の載置プレート21に載置した床パネル4・・の下面と固定台10の立ち上がり軸部12の上端との間には、可動台20の上下動を許容するための間隙L1、L2が確保されている。そして、防振装置1の高さ(載置プレート21の上面から固定プレート11の下面までの高さ)L3は、例えば40mm程度に低く抑えられている。 As a result, when the vibration isolator 1 is incorporated into the floor, that is, when the flooring 3 is installed on the movable base 20, the movable base 20 is moved down by the load of the flooring 3 as shown in FIG. 3. Thus, the upper surface 30a and the lower surface 30b of the vibration isolator 30 are in a substantially horizontal state by pressing down the outer peripheral portion of the vibration isolator 30 that is bonded and fixed to the inner peripheral surface of the hanging frame portion 22. In this state of use, the floor panel 4 placed between the upper surface of the fixed plate 11 of the fixed base 10 and the lower end of the hanging frame portion 22 of the movable base 20 and the mounting plate 21 of the movable base 20. Between the lower surface of the fixed base 10 and the upper end of the rising shaft portion 12 of the fixed base 10, gaps L1 and L2 for allowing the movable base 20 to move up and down are secured. And the height L3 (height from the upper surface of the mounting plate 21 to the lower surface of the fixed plate 11) L3 of the vibration isolator 1 is suppressed to about 40 mm, for example.
使用状態の防振装置1では、防振材30がその内周部分と外周部分との間で上下方向に位置ずれを生じさせるように剪断変形可能となっていて、鉛直方向に対しては柔らかくなっている(鉛直方向に対しては振動減衰機能を有している)が、その一方で、防振材30の内部において複数の円筒状剛性体31・・が上下方向に位置ずれすることなく水平方向に間隔をあけて同心円状に配置された状態となっていて、防振材30の水平方向の変形を規制することから、水平方向に対しては高い剛性を有している。 In the anti-vibration device 1 in use, the anti-vibration material 30 can be shear-deformed so as to cause a positional shift in the vertical direction between the inner peripheral portion and the outer peripheral portion, and is soft in the vertical direction. (It has a vibration damping function in the vertical direction), but on the other hand, the plurality of cylindrical rigid bodies 31... Since they are arranged concentrically at intervals in the horizontal direction and restrict deformation of the vibration isolator 30 in the horizontal direction, they have high rigidity in the horizontal direction.
上記構成の防振装置1を組み込んだ床部(床構造)では、床材3において床衝撃音を伴う鉛直方向の振動が発生して、その振動が防振装置1に入力されると、防振材30の剪断変形に伴って可動台20が上下動する。そして、この防振材30の剪断変形によって、振動が減衰されて、床衝撃音を低減することができるようになっている。 In the floor portion (floor structure) in which the vibration isolator 1 having the above-described configuration is incorporated, vibrations in the vertical direction accompanied by floor impact sound are generated in the floor material 3, and when the vibrations are input to the vibration isolator 1, The movable table 20 moves up and down with the shear deformation of the vibration member 30. The vibration is attenuated by the shear deformation of the vibration isolator 30 so that the floor impact sound can be reduced.
しかも、防振装置1は、上述のように水平方向に対しては防振材30が変形し難く高い剛性を有していることから、水平剛性を高めた床パネル4・・を並設してなる床材3によって水平力を負担することが可能となって、水平ブレースの廃止によるコストダウンを実現することができる。 In addition, since the vibration isolator 30 has a high rigidity that is difficult to deform in the horizontal direction as described above, the vibration isolator 1 has the floor panels 4. It is possible to bear the horizontal force by the floor material 3 and the cost can be reduced by eliminating the horizontal brace.
さらに、防振装置1は、床材3の設置前の初期状態において、防振材30の上面30a及び下面30bが内周部分から外周部分に向かって上り傾斜していて、床材3を設置した使用状態において、防振材30の上面30a及び下面30bが略水平な状態となるように工夫されている。しかも、可動台20の載置プレート21に、逃がし孔21aが形成されていて、可動台20の下動時に、載置プレート21が固定台10の立ち上がり軸部12及び防振材30に干渉しないように工夫されている。これにより、装置の高さを極力低くすることができ、床梁2と床材3との間にコンパクトに介在させて床レベルを低く抑えることができる。 Further, in the initial state before the flooring 3 is installed, the vibration isolator 1 has the upper surface 30a and the lower surface 30b of the vibration damping material 30 inclined upward from the inner peripheral part toward the outer peripheral part, and the flooring 3 is installed. In the used state, the upper surface 30a and the lower surface 30b of the vibration isolator 30 are devised so as to be in a substantially horizontal state. In addition, an escape hole 21 a is formed in the mounting plate 21 of the movable table 20, so that the mounting plate 21 does not interfere with the rising shaft portion 12 of the fixed table 10 and the vibration isolating material 30 when the movable table 20 moves downward. It has been devised. Thereby, the height of the apparatus can be made as low as possible, and the floor level can be kept low by being compactly interposed between the floor beam 2 and the floor material 3.
ここで、防振装置1と、上記のような工夫がなされていない防振装置50(比較例の防振装置50)との高さ寸法の違いを、図6に基づいて説明する。図6(a)は、床材3の設置前の初期状態を示しており、図6(b)は、床材3を設置した使用状態を示している。なお、比較例の防振装置50は、床材3の設置前の初期状態において、防振材30の上面30a及び下面30bが略水平な状態となっていて、床材3を設置した使用状態において、防振材30の上面30a及び下面30bが内周部分から外周部分に向かって下り傾斜した状態となり、また可動台20の載置プレート21には逃がし孔21aは形成されていない。防振装置1の防振材30と比較例の防振装置50の防振材30とは、全く同じ容量となっている。 Here, the difference in height dimension between the vibration isolator 1 and the vibration isolator 50 that has not been devised as described above (the vibration isolator 50 of the comparative example) will be described with reference to FIG. FIG. 6A shows an initial state before the flooring 3 is installed, and FIG. 6B shows a use state in which the flooring 3 is installed. In the vibration isolator 50 of the comparative example, the upper surface 30a and the lower surface 30b of the vibration isolator 30 are in a substantially horizontal state in the initial state before the floor material 3 is installed, and the use state in which the floor material 3 is installed. The upper surface 30a and the lower surface 30b of the vibration isolator 30 are inclined downward from the inner peripheral portion toward the outer peripheral portion, and no escape hole 21a is formed in the mounting plate 21 of the movable base 20. The vibration isolator 30 of the vibration isolator 1 and the vibration isolator 30 of the anti-vibration apparatus 50 of the comparative example have the same capacity.
図6(b)に示すように、床材3を設置した使用状態において、防振装置1では、防振材30の上面30a及び下面30bが略水平な状態となっているのに対して、比較例の防振装置50では、防振材30の上面30a及び下面30bが内周部分から外周部分に向かって下り傾斜した状態となっている。このため、比較例の防振装置50では、固定台10の固定プレート11の上面と可動台20の垂下枠部22の下端との間に、間隙L1を確保しようとすれば、防振材30の内周部分の固定位置を防振装置1よりも高くしなければならず、その分だけ固定台10の立ち上がり軸部12の高さが防振装置1よりも高くなる。これに伴い、可動台20の載置プレート21の下面と固定台10の立ち上がり軸部12の上端との間に、間隙L2を確保するためには、可動台20の垂下枠部22の高さを防振装置1よりも高くしなければならず、その分だけ載置プレート21の高さ位置が防振装置1よりも高くなる。しかも、防振装置1では、載置プレート21に逃がし孔21aを形成してあるので、載置プレート21の高さ位置をプレート板厚分だけ下げるようにしても、載置プレート21に載置した床パネル4・・の下面と固定台10の立ち上がり軸部12の上端との間に、間隙L2を確保することができる。このようなことから、防振装置1では、床材3を設置した使用状態において、比較例の防振装置50に比べて高さ寸法を小さくすることができ、床部にコンパクトに組み込むことができる。 As shown in FIG.6 (b), in the use condition which installed the flooring 3, in the vibration isolator 1, while the upper surface 30a and the lower surface 30b of the vibration isolator 30 are in a substantially horizontal state, In the vibration isolator 50 of the comparative example, the upper surface 30a and the lower surface 30b of the vibration isolator 30 are inclined downward from the inner peripheral portion toward the outer peripheral portion. For this reason, in the vibration isolator 50 of the comparative example, if it is intended to secure the gap L1 between the upper surface of the fixed plate 11 of the fixed base 10 and the lower end of the hanging frame portion 22 of the movable base 20, the vibration isolator 30 The fixing position of the inner peripheral portion of the fixed base 10 must be higher than that of the vibration isolator 1, and the height of the rising shaft portion 12 of the fixing base 10 is higher than that of the vibration isolator 1. Accordingly, in order to secure a gap L <b> 2 between the lower surface of the mounting plate 21 of the movable table 20 and the upper end of the rising shaft portion 12 of the fixed table 10, the height of the hanging frame portion 22 of the movable table 20. Therefore, the height position of the mounting plate 21 is higher than that of the vibration isolator 1. In addition, in the vibration isolator 1, since the escape hole 21a is formed in the placement plate 21, the placement plate 21 is placed on the placement plate 21 even if the height position of the placement plate 21 is lowered by the plate thickness. A gap L <b> 2 can be secured between the lower surface of the floor panel 4... And the upper end of the rising shaft portion 12 of the fixed base 10. For this reason, the vibration isolator 1 can be made smaller in height than the anti-vibration apparatus 50 of the comparative example in a use state in which the floor material 3 is installed, and can be incorporated into the floor portion in a compact manner. it can.
以上に、この発明の実施形態について説明したが、この発明は、上記実施形態に限定されるものではなく、この発明の範囲内で種々変更して実施することが可能である。 The embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention.
1・・防振装置、2・・床梁、3・・床材、10・・固定台、12・・立ち上がり軸部、20・・可動台、21・・載置プレート、21a・・逃がし孔、22・・垂下枠部、30・・防振材、30a・・防振材の上面、30b・・防振材の下面、31・・筒状剛性体、32・・筒状弾性体、33・・上面弾性体、34・・下面弾性体、35・・中央孔部 1 .... Vibration isolation device 2 .... Floor beam 3 .... Floor material 10 .... Fixed base 12 ...... Rising shaft part 20 .... Movable stand 21 ...... Plate plate 21a ... Release hole , 22... Draft frame part, 30.. Antivibration material, 30 a.. Top surface of vibration isolation material, 30 b... Bottom surface of vibration isolation material, 31. ..Elastic upper surface, 34 ..Lower elastic body, 35 ..Central hole
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