JP5993611B2

JP5993611B2 - Floor structure and leaf spring type damping device

Info

Publication number: JP5993611B2
Application number: JP2012109551A
Authority: JP
Inventors: 孝啓可知; 高田　友和; 友和高田
Original assignee: Sumitomo Riko Co Ltd
Current assignee: Sumitomo Riko Co Ltd
Priority date: 2012-05-11
Filing date: 2012-05-11
Publication date: 2016-09-14
Anticipated expiration: 2032-05-11
Also published as: JP2013237983A

Description

本発明は、主として住宅の重量床衝撃音を低減するために、板ばね式制振装置を配置した床構造および板ばね式制振装置に関するものである。 The present invention relates to a floor structure in which leaf spring type vibration damping devices are arranged and a leaf spring type vibration damping device mainly for reducing heavy floor impact sound of a house.

特開平３−２６０２４５号公報（特許文献１）には、防音床構造として、スラブの天井側に振動モードの腹の位置近傍に複数のダイナミックダンパを設置し、それぞれのダイナミックダンパの固有値をスラブの２以上の固有値近傍にチューニングすることが記載されている。また、床に設置するダイナミックダンパとして、板ばね式制振装置が、特開２０１０−２３００３１号公報（特許文献２）に記載されている。 In JP-A-3-260245 (Patent Document 1), as a soundproof floor structure, a plurality of dynamic dampers are installed on the ceiling side of a slab in the vicinity of the position of the antinode of the vibration mode. It is described that tuning is performed in the vicinity of two or more eigenvalues. Further, as a dynamic damper to be installed on the floor, a leaf spring vibration damping device is described in Japanese Patent Application Laid-Open No. 2010-230031 (Patent Document 2).

特開平３−２６０２４５号公報JP-A-3-260245 特開２０１０−２３００３１号公報JP 2010-230031 A

本発明は、重量床衝撃音をより低減することができる床構造を提供すること、および、当該床構造に好適に用いられる板ばね式制振装置を提供することを目的とする。 An object of this invention is to provide the floor structure which can reduce a heavy floor impact sound more, and to provide the leaf | plate spring type damping device used suitably for the said floor structure.

（床構造）
本手段に係る床構造は、床材に板ばね制振装置を配置した床構造であって、前記板ばね制振装置は、前記床材に固定される支持部、および、前記床材に対して振動可能な振動部を有する板ばね部材と、前記板ばね部材の前記振動部に取り付けられるマス部材と、を備え、前記板ばね部材は、前記振動部の先端を自由端とするように、前記床材に対して片持ち支持され、前記支持部は、前記床材の振動モードの節側よりも腹側に位置し、かつ、前記振動部の先端よりも前記腹側に位置する。
さらに、前記床材は、複数のコンクリート床材を設置することにより形成され、前記板ばね式制振装置は、前記複数のコンクリート床材を構成する各コンクリート床材に配置され、前記支持部は、前記振動部の先端に対して、各前記コンクリート床材の中央側に位置する。 (Floor structure)
The floor structure according to the present means is a floor structure in which a leaf spring damping device is disposed on a floor material, and the leaf spring damping device is supported with respect to the floor material and the floor material. A plate spring member having a vibrating portion capable of vibrating, and a mass member attached to the vibrating portion of the plate spring member, wherein the plate spring member has a free end at the tip of the vibrating portion, The floor material is cantilevered, and the support portion is located on the ventral side with respect to the node side of the vibration mode of the flooring material and on the ventral side with respect to the tip of the vibration portion.
Further, the floor material is formed by installing a plurality of concrete floor materials, and the leaf spring type vibration damping device is disposed on each concrete floor material constituting the plurality of concrete floor materials, and the support portion is The center of each concrete floor is located with respect to the tip of the vibration part.

片持ち支持される板ばね式制振装置は、長さを有するものであって、板ばね部材の支持部の位置とマス部材の位置とは異なっている。ここで、板ばね部材の支持部を床材の振動モードの節側よりも腹側に位置させることにより、床材が振動する際に、板ばね部材全体が大きく振動する状態になる。特に、板ばね部材のうち支持部が、振動部の先端側よりも、振動モードの腹側に位置するようにしている。つまり、板ばね部材が存在する領域の中においても、支持部が腹側に位置することになる。そして、板ばね部材の振動部の振幅は、支持部の振幅に依存する。つまり、板ばね部材を上記のように配置することで、支持部を大きく振動させることができ、結果として、振動部を大きく振動させることができる。振動部を大きく振動させることができることで、マス部材が大きく振動することになり、床材の振動を効果的に低減することができる。従って、重量床衝撃音をより低減することができる。 The leaf spring type vibration damping device that is cantilevered has a length, and the position of the support portion of the leaf spring member is different from the position of the mass member. Here, by positioning the support portion of the leaf spring member on the ventral side rather than the node side of the vibration mode of the floor material, the entire leaf spring member is vibrated greatly when the floor material vibrates. In particular, the support portion of the leaf spring member is positioned on the ventral side of the vibration mode with respect to the distal end side of the vibration portion. That is, the support portion is positioned on the ventral side even in the region where the leaf spring member exists. And the amplitude of the vibration part of a leaf | plate spring member is dependent on the amplitude of a support part. That is, by disposing the leaf spring member as described above, the support portion can be vibrated greatly, and as a result, the vibration portion can be vibrated greatly. Since the vibrating portion can be vibrated greatly, the mass member vibrates greatly, and the vibration of the flooring can be effectively reduced. Therefore, the heavy floor impact sound can be further reduced.

複数のコンクリート床材を設置することにより形成される床材は、床材全体としての振動モードを有するが、隣接するコンクリート床材の連続性は僅かながら有しない。コンクリート床材は、梁に対して連結しており、コンクリート床材同士は連結されておらず、木板に比べて厚みを有するため、それぞれのコンクリート床材は独立して振動する。そして、板ばね式制振装置を、床材全体の腹側であって、かつ、各コンクリート床材の中央側に設置することで、床材全体の振動を低減しつつ、それぞれのコンクリート床材の異なる振動モードに対応することが可能となる。従って、コンクリート床材により形成される床材に適用した場合に、重量床衝撃音をより低減することができる。 The floor material formed by installing a plurality of concrete floor materials has a vibration mode as the entire floor material, but has little continuity between adjacent concrete floor materials. Since the concrete flooring is connected to the beam, the concrete flooring is not connected to each other, and has a thickness as compared with the wooden board, so that each concrete flooring vibrates independently. And by installing the leaf spring type vibration damping device on the belly side of the entire flooring material and on the center side of each concrete flooring material, each concrete flooring material is reduced while reducing the vibration of the entire flooring material. It is possible to cope with different vibration modes. Therefore, when applied to a floor material formed of a concrete floor material, the heavy floor impact sound can be further reduced.

また、前記コンクリート床材は、長方形の床面を有し、前記板ばね式制振装置は、前記支持部から前記振動部の先端へ向かう方向が前記コンクリート床材の床面の長手方向に一致するように配置されるようにしてもよい。このようにすることで、板ばね部材の長さを十分に確保することができる。ここで、板ばね部材の長さを長くするほど、振動低減効果は高い。つまり、上記のように設置することで、大きな振動低減効果を発揮できる。 Further, the concrete flooring has a rectangular floor surface, and the leaf spring type vibration damping device has a direction in which the direction from the support part toward the tip of the vibration part coincides with a longitudinal direction of the floor surface of the concrete flooring You may make it arrange | position so. By doing in this way, the length of a leaf | plate spring member can fully be ensured. Here, the longer the length of the leaf spring member is, the higher the vibration reducing effect is. That is, by installing as described above, a large vibration reduction effect can be exhibited.

また、前記板ばね式制振装置は、１つの前記コンクリート床材に複数配置され、１つの前記コンクリート床材に配置される複数の前記板ばね式制振装置において、前記振動部の先端同士の離間距離は、前記支持部同士の離間距離より長く設定されているようにしてもよい。１つのコンクリート床材に複数の板ばね式制振装置を設置する場合に、複数の板ばね式制振装置の支持部を所望の位置に設置することができ、それぞれが振動低減効果を確実に発揮できる。 Further, a plurality of the leaf spring type damping devices are arranged on one concrete floor material, and a plurality of the leaf spring type damping devices arranged on the one concrete floor material, The separation distance may be set longer than the separation distance between the support portions. When installing a plurality of leaf spring damping devices on a single concrete floor, the support portions of the plurality of leaf spring damping devices can be installed at desired positions, each of which ensures a vibration reduction effect. Can demonstrate.

また、コンクリート床材に適用した場合に、複数の前記板ばね式制振装置の振動低減周波数は、異なる周波数帯に設定されるようにしてもよい。これにより、複数の振動モードの振動を低減することができる。 Moreover, when applied to a concrete floor material, the vibration reduction frequencies of the plurality of leaf spring damping devices may be set to different frequency bands. Thereby, vibration of a plurality of vibration modes can be reduced.

また、上記においては、コンクリート床材に適用した場合を記載したが以下のようにしてもよい。
本手段に係る他の床構造は、床材に板ばね制振装置を配置した床構造であって、前記板ばね制振装置は、前記床材に固定される支持部、および、前記床材に対して振動可能な振動部を有する板ばね部材と、前記板ばね部材の前記振動部に取り付けられるマス部材と、を備え、前記板ばね部材は、前記振動部の先端を自由端とするように、前記床材に対して片持ち支持され、前記支持部は、前記床材の振動モードの節側よりも腹側に位置し、かつ、前記振動部の先端よりも前記腹側に位置する。
前記床材は、木板であり、梁により区画された複数の梁区画木板床材を設置することにより形成され、前記板ばね式制振装置は、前記複数の梁区画木板床材を構成する各梁区画木板床材に配置され、前記支持部は、前記振動部の先端に対して、各前記梁区画木板床材の中央側に位置する。 Moreover, although the case where it applied to a concrete flooring was described in the above, you may make it as follows.
Another floor structure according to the present means is a floor structure in which a leaf spring damping device is arranged on a floor material, and the leaf spring damping device includes a support portion fixed to the floor material, and the floor material. And a mass member attached to the vibrating part of the leaf spring member, the leaf spring member having a free end at the tip of the vibrating part The floor is cantilevered with respect to the flooring, and the support is positioned on the ventral side relative to the node side of the vibration mode of the flooring and on the ventral side relative to the tip of the vibrating part. .
The floor material is a wood board, and is formed by installing a plurality of beam section wood board floor materials partitioned by a beam, and the leaf spring type vibration damping device is configured by each of the plurality of beam section wood board floor materials. It arrange | positions at the beam division wood board floor material, and the said support part is located in the center side of each said beam division wood board floor material with respect to the front-end | tip of the said vibration part .

複数の木板床材を複数の梁により連結される床材は、床材全体としての振動モードを有するが、それぞれの梁区画木板床材個別の振動モードを有する場合がある。そして、板ばね式制振装置を、床材全体の腹側であって、かつ、各梁区画木板床材の中央側に設置することで、床材全体の振動を低減しつつ、それぞれの梁区画木板床材の異なる振動モードに対応することが可能となる。従って、梁区画木板床材により形成される床材に適用した場合に、重量床衝撃音をより低減することができる。 A floor material in which a plurality of wood board floor materials are connected by a plurality of beams has a vibration mode as the whole floor material, but may have a vibration mode of each beam section wood board floor material individually. And by installing the leaf spring type vibration damping device on the belly side of the whole flooring and on the center side of each beam section wood board flooring, each beam is reduced while reducing the vibration of the whole flooring. It becomes possible to cope with different vibration modes of the partitioned wood board flooring. Therefore, when it applies to the floor material formed with a beam division wood board floor material, a heavy floor impact sound can be reduced more.

また、前記梁区画木板床材は、長方形の床面を有し、前記板ばね式制振装置は、前記支持部から前記振動部の先端へ向かう方向が前記梁区画木板床材の床面の長手方向に一致するように配置されるようにしてもよい。このようにすることで、板ばね部材の長さを十分に確保することができる。ここで、板ばね部材の長さを長くするほど、振動低減効果は高い。つまり、上記のように設置することで、大きな振動低減効果を発揮できる。 Further, the beam section wood board flooring has a rectangular floor surface, and the leaf spring type vibration damping device has a direction from the support portion toward the tip of the vibration section of the floor surface of the beam section wood board floor material. You may make it arrange | position so that it may correspond with a longitudinal direction. By doing in this way, the length of a leaf | plate spring member can fully be ensured. Here, the longer the length of the leaf spring member is, the higher the vibration reducing effect is. That is, by installing as described above, a large vibration reduction effect can be exhibited.

また、前記板ばね式制振装置は、１つの前記梁区画木板床材に複数配置され、１つの前記梁区画木板床材に配置される複数の前記板ばね式制振装置において、前記振動部の先端同士の離間距離は、前記支持部同士の離間距離より長く設定されているようにしてもよい。１つの梁区画木板床材に複数の板ばね式制振装置を設置する場合に、複数の板ばね式制振装置の支持部を所望の位置に設置することができ、それぞれが振動低減効果を確実に発揮できる。 A plurality of the leaf spring type damping devices are arranged on one beam section wood board floor material, and a plurality of the leaf spring type damping devices arranged on one beam section wood board floor material, the vibration section The distance between the tips may be set longer than the distance between the support portions. When installing a plurality of leaf spring type damping devices on a single beam section wood board flooring, the support portions of the plurality of leaf spring type damping devices can be installed at desired positions, and each has a vibration reducing effect. Can be demonstrated reliably.

また、木板床材に適用した場合に、複数の前記板ばね式制振装置の振動低減周波数は、異なる周波数帯に設定されるようにしてもよい。これにより、複数の振動モードの振動を低減することができる。 Moreover, when applied to a wood board floor material, the vibration reduction frequencies of the plurality of leaf spring type damping devices may be set to different frequency bands. Thereby, vibration of a plurality of vibration modes can be reduced.

上記床構造に適用される板ばね式制振装置は、以下のような構成とするとよい。すなわち、前記板ばね部材の前記振動部は、前記支持部と前記マス部材を取り付ける部位とをリブ状に連結するリブ状立壁部を備え、前記リブ状立壁部は、前記マス部材側に位置し、振動方向幅を同一に形成されたマス側立壁部と、前記支持部側に位置し、振動方向幅を前記マス側立壁部の振動方向幅より大きく形成された支持部側立壁部と、を備え、前記板ばね式制振装置は、前記マス側立壁部のうち前記支持部側立壁部側に固定され、前記床材に接触するように設けられた粘弾性体を備える。 The leaf spring type damping device applied to the floor structure may be configured as follows. That is, the vibration portion of the leaf spring member includes a rib-like standing wall portion that connects the support portion and a portion to which the mass member is attached in a rib shape, and the rib-like standing wall portion is located on the mass member side. A mass-side standing wall portion having the same vibration direction width, and a support-side standing wall portion positioned on the support portion side and having a vibration direction width larger than the vibration direction width of the mass-side standing wall portion, The leaf spring type vibration damping device includes a viscoelastic body that is fixed to the support portion side standing wall portion side of the mass side standing wall portion and is provided so as to contact the flooring.

振動部がリブ状立壁部を有することにより、マス部材の有効質量を大きくしつつ板ばね部材の軽量化を図ることができる。ここで、板ばね部材の長さを長くすることにより、振動低減効果が大きくなる。しかし、板ばね部材が長くなるほどねじれる可能性が高くなる。これでは、振動低減効果を十分に得ることができない場合がある。 Since the vibrating portion has the rib-like standing wall portion, the weight of the leaf spring member can be reduced while increasing the effective mass of the mass member. Here, the vibration reducing effect is increased by increasing the length of the leaf spring member. However, the longer the leaf spring member, the higher the possibility of twisting. In this case, the vibration reduction effect may not be sufficiently obtained.

そこで、粘弾性体をマス側立壁部のうち支持部側立壁部側に設置することで、マス部材の重心を板ばね式制振装置の剛芯（板ばね部材および粘弾性体のねじり剛性の中心）に近づかせることができ、板ばね部材のねじれを抑制できる。従って、確実に、マス部材を床材の振動方向に振動させることができ、振動低減効果を発揮する。さらに、粘弾性体をマス側立壁部のうち支持部側立壁部側に設置することで、マス側立壁部のうち支持されていない範囲を長くすることができる。従って、マス部材を大きく振動させることができ、振動低減効果を発揮する。 Therefore, by installing the viscoelastic body on the support side vertical wall side of the mass side standing wall portion, the center of gravity of the mass member is set to the rigid core of the leaf spring type damping device (the torsional rigidity of the leaf spring member and the viscoelastic body). Center), and the twist of the leaf spring member can be suppressed. Therefore, the mass member can be reliably vibrated in the vibration direction of the flooring, and the vibration reducing effect is exhibited. Furthermore, the range which is not supported among the mass side standing wall part can be lengthened by installing a viscoelastic body in the support part side standing wall part side among the mass side standing wall part. Therefore, the mass member can be vibrated greatly, and a vibration reducing effect is exhibited.

また、前記支持部側立壁部は、前記マス側立壁部側から前記支持部側に行くに従って、振動方向幅が大きく形成され、前記粘弾性体は、前記支持部側立壁部に隣接して設けられるようにしてもよい。つまり、支持部側立壁部は、マス側立壁部に比べて、床材の振動方向に対する断面係数が大きい。従って、支持部側立壁部は、マス側立壁部を確実に支持することができる。このとき、粘弾性体は、支持部側立壁部に隣接して設けているため、支持部側立壁部による支持力を補強する役割を有する。従って、支持部側立壁部は安定した状態で床材に支持される。その結果、支持部側立壁部がねじれることを抑制でき、マス側立壁部を床材の振動方向に確実に振動させることができる。 Further, the support portion-side standing wall portion is formed such that a width in a vibration direction increases from the mass-side standing wall portion side to the support portion side, and the viscoelastic body is provided adjacent to the support portion-side standing wall portion. You may be made to do. That is, the support part side standing wall part has a larger section modulus with respect to the vibration direction of the flooring material than the mass side standing wall part. Therefore, the support part side standing wall part can support the mass side standing wall part reliably. At this time, since the viscoelastic body is provided adjacent to the support portion side standing wall portion, it has a role of reinforcing the support force by the support portion side standing wall portion. Therefore, the support portion-side standing wall portion is supported by the floor material in a stable state. As a result, it is possible to suppress the support-part-side standing wall portion from being twisted, and to reliably vibrate the mass-side standing wall portion in the vibration direction of the flooring.

また、前記支持部は、前記粘弾性体よりも、前記床材の振動モードの腹側に位置するようにしてもよい。つまり、板ばね部材が存在する領域の中において、粘弾性体と支持部とを比較した場合に、支持部が腹側に位置することになる。これにより、床材が振動した場合に、支持部を大きく振動させることができ、結果として、床材の振動を低減することができる。 Moreover, you may make it the said support part be located in the belly side of the vibration mode of the said flooring material rather than the said viscoelastic body. That is, when the viscoelastic body and the support portion are compared in the region where the leaf spring member exists, the support portion is positioned on the ventral side. Thereby, when a flooring vibrates, a support part can be vibrated largely, As a result, the vibration of a flooring can be reduced.

（板ばね式制振装置）
また、本手段に係る板ばね式制振装置は、床材に固定される支持部および前記床材に対して振動可能な振動部を有し、前記振動部の先端を自由端とするように前記床材に対して片持ち支持される板ばね部材と、前記板ばね部材の前記振動部に取り付けられるマス部材と、前記振動部に固定され、前記床材に接触するように設けられた粘弾性体と、を備える板ばね式制振装置であって、前記板ばね部材の前記振動部は、前記支持部と前記マス部材を取り付ける部位とをリブ状に連結するリブ状立壁部を備え、前記リブ状立壁部は、前記マス部材側に位置し、振動方向幅を同一に形成されたマス側立壁部と、前記支持部側に位置し、振動方向幅を前記マス側立壁部の振動方向幅より大きく形成された支持部側立壁部と、を備え、前記粘弾性体は、前記マス側立壁部のうち前記支持部側立壁部側に固定される。 (Leaf spring type damping device)
The plate spring damping device of the present device, the support portion fixed to the flooring and has a vibrating portion which can vibrate relative to the flooring, so that a free end tip of the vibrating portion A leaf spring member cantilevered with respect to the flooring, a mass member attached to the vibration part of the leaf spring member, and a viscosity fixed to the vibration part and provided to contact the flooring An elastic body, wherein the vibration portion of the leaf spring member includes a rib-like standing wall portion that connects the support portion and a portion to which the mass member is attached in a rib shape, The rib-like standing wall portion is located on the mass member side, and is formed on the mass side standing wall portion having the same vibration direction width, and on the support portion side, and the vibration direction width is the vibration direction of the mass side standing wall portion. A support portion-side standing wall portion formed larger than the width, and the viscoelastic body includes: Of serial mass side wall part is fixed to the support part side vertical wall portion.

振動部がリブ状立壁部を有することにより、マス部材の有効質量を大きくしつつ板ばね部材の軽量化を図ることができる。ここで、板ばね部材の長さを長くすることにより、振動低減効果が大きくなる。しかし、板ばね部材が長くなるほどねじれる可能性が高くなる。これでは、十分に振動低減効果を得ることができない場合がある。 Since the vibrating portion has the rib-like standing wall portion, the weight of the leaf spring member can be reduced while increasing the effective mass of the mass member. Here, the vibration reducing effect is increased by increasing the length of the leaf spring member. However, the longer the leaf spring member, the higher the possibility of twisting. In this case, the vibration reduction effect may not be obtained sufficiently.

そこで、粘弾性体をマス側立壁部のうち支持部側立壁部側に設置することで、マス部材の重心を板ばね部材の剛芯（ねじり剛性の中心）に近づき、板ばね部材のねじれを抑制できる。従って、確実に、マス部材を床材の振動方向に振動させることができ、振動低減効果を発揮する。さらに、粘弾性体をマス側立壁部のうち支持部側立壁部側に設置することで、マス側立壁部のうち支持されていない範囲を長くすることができる。従って、マス部材を大きく振動させることができ、振動低減効果を発揮する。 Therefore, by installing the viscoelastic body on the support side vertical wall side of the mass side standing wall portion, the center of gravity of the mass member is brought close to the rigid core (center of torsional rigidity) of the leaf spring member, and torsion of the leaf spring member is performed. Can be suppressed. Therefore, the mass member can be reliably vibrated in the vibration direction of the flooring, and the vibration reducing effect is exhibited. Furthermore, the range which is not supported among the mass side standing wall part can be lengthened by installing a viscoelastic body in the support part side standing wall part side among the mass side standing wall part. Therefore, the mass member can be vibrated greatly, and a vibration reducing effect is exhibited.

第一実施形態：床裏面に取り付けた状態における板ばね式制振装置の正面図である。1st embodiment: It is a front view of the leaf | plate spring type damping device in the state attached to the floor back surface. 図１Ａの板ばね式制振装置の底面図である。It is a bottom view of the leaf | plate spring type damping device of FIG. 1A. 図１Ａの板ばね式制振装置の右側面図である。It is a right view of the leaf | plate spring type damping device of FIG. 1A. 図１Ａの板ばね式制振装置を構成する板ばね部材の正面図である。It is a front view of the leaf | plate spring member which comprises the leaf | plate spring type damping device of FIG. 1A. 図２Ａの板ばね部材の底面図である。It is a bottom view of the leaf | plate spring member of FIG. 2A. 図２Ａの板ばね部材の右側面図である。It is a right view of the leaf | plate spring member of FIG. 2A. コンクリート床材を適用した場合において板ばね式制振装置の配置を示す床構造の正面から見た断面図である。It is sectional drawing seen from the front of the floor structure which shows arrangement | positioning of a leaf | plate spring type damping device in the case of applying a concrete flooring. 図３Ａの床構造の底面図である。It is a bottom view of the floor structure of FIG. 3A. 図３Ｂの床構造のIIIＣ−IIIＣ断面図である。It is IIIC-IIIC sectional drawing of the floor structure of FIG. 3B. 図１Ａの板ばね式制振装置を適用した場合と適用していない場合の周波数振動特性を示す。The frequency vibration characteristic when not applying the case where the leaf | plate spring type damping device of FIG. 1A is applied is shown. 第二実施形態：木板床材に適用した場合において板ばね式制振装置の配置を示す床構造の正面から見た断面図である。2nd embodiment: It is sectional drawing seen from the front of the floor structure which shows arrangement | positioning of a leaf | plate spring type damping device, when it applies to a wood board flooring. 図５Ａの床構造の底面図である。It is a bottom view of the floor structure of FIG. 5A. 図５Ｂの床構造のＶＣ−ＶＣ断面図である。It is VC-VC sectional drawing of the floor structure of FIG. 5B.

＜第一実施形態＞
（板ばね式制振装置の構成）
板ばね式制振装置１００の構成について、図１Ａ〜図１Ｃ、および、図２Ａ〜図２Ｃを参照して説明する。板ばね式制振装置１００は、住宅の上階の床材５０（図１Ａの二点鎖線）の裏面側に固定されており、床材５０に生じた振動を低減する装置である。 <First embodiment>
(Configuration of leaf spring type damping device)
The configuration of the leaf spring vibration damping device 100 will be described with reference to FIGS. 1A to 1C and FIGS. 2A to 2C. The leaf spring vibration damping device 100 is fixed to the back side of the floor material 50 (two-dot chain line in FIG. 1A) on the upper floor of the house, and is a device that reduces vibration generated in the floor material 50.

この板ばね式制振装置１００は、板ばね部材１０と、マス部材３０と、粘弾性体４０とを備える。そして、板ばね部材１０が床材５０に対してマス部材３０を振動可能となるように支持しており、さらに板ばね部材１０に取り付けられた粘弾性体４０が床材５０に接触することにより板ばね部材１０を弾性支持している。以下詳細に説明する。 The leaf spring vibration damping device 100 includes a leaf spring member 10, a mass member 30, and a viscoelastic body 40. The leaf spring member 10 supports the floor member 50 so that the mass member 30 can vibrate, and the viscoelastic body 40 attached to the leaf spring member 10 comes into contact with the floor member 50. The leaf spring member 10 is elastically supported. This will be described in detail below.

マス部材３０は、図１Ａ〜図１Ｃに示すような円柱状に形成された鉄塊である。このマス部材３０の質量は、目的の制振特性に応じて変更され、例えば、数ｋｇ程度を有するものを採用する。 The mass member 30 is an iron ingot formed in a columnar shape as shown in FIGS. 1A to 1C. The mass of the mass member 30 is changed according to the desired vibration damping characteristics, and for example, a mass having about several kg is adopted.

板ばね部材１０は、平板状の鋼板に対して打ち抜き加工およびプレス加工を施すことにより形成される。板ばね部材１０には、軽量化を図るために数ｍｍ〜数ｃｍ程度の薄い板厚の鋼板を用いる。この板ばね部材１０は、マス部材３０が振動体である床材５０に対して床材５０の主振動方向（図１Ａの上下方向）に相対移動可能となるように、床材５０の裏面に対してマス部材３０を支持する。ここで、床材５０の主振動方向とは、建物の上下方向となる。 The leaf spring member 10 is formed by punching and pressing a flat steel plate. The leaf spring member 10 is a steel plate having a thin plate thickness of about several mm to several cm in order to reduce the weight. The leaf spring member 10 is provided on the back surface of the flooring 50 so that the mass member 30 can move relative to the flooring 50 that is a vibrating body in the main vibration direction of the flooring 50 (vertical direction in FIG. 1A). On the other hand, the mass member 30 is supported. Here, the main vibration direction of the flooring 50 is the vertical direction of the building.

板ばね部材１０は、支持部１１と、支持部１１と一体的に形成され床材５０および支持部１１に対して主振動方向に対して振動する振動部１２とを備える。ただし、振動部１２のうち支持部１１に近い部位は振動しない場合があるが、板ばね部材１０のうち支持部１１以外の部位を振動部１２とする。 The leaf spring member 10 includes a support portion 11 and a vibrating portion 12 that is formed integrally with the support portion 11 and vibrates in the main vibration direction with respect to the flooring 50 and the support portion 11. However, although the part near the support part 11 in the vibration part 12 may not vibrate, the part other than the support part 11 in the leaf spring member 10 is defined as the vibration part 12.

支持部１１は、矩形の平板状をなす部位である。この支持部１１の一方面が振動体である床材５０の裏面に接触するようにして、支持部１１は床材５０に固定されている。この支持部１１には、幅方向中央に位置する２カ所の貫通孔１１ａが形成されている。この２カ所の貫通孔１１ａには、床材５０の裏面に締結するためのねじ（図示せず）が挿通される。 The support part 11 is a part which makes a rectangular flat plate shape. The support portion 11 is fixed to the floor material 50 such that one surface of the support portion 11 is in contact with the back surface of the floor material 50 that is a vibrating body. The support portion 11 is formed with two through holes 11a located at the center in the width direction. Screws (not shown) for fastening to the back surface of the flooring 50 are inserted through the two through holes 11a.

従って、振動部１２は、板ばね部材１０のうち平板状の支持部１１以外の部位、すなわち、床材５０に接触していない部位となる。そして、板ばね部材１０は、振動部１２の先端（図１Ａの右端）を自由端とするように床材５０に対して片持ち支持される。振動部１２は、２つのマス取付部２１，２２と、粘弾性体取付部２３と、傾斜板部２４と、２つのリブ状立壁部２５，２６とを備える。 Therefore, the vibration part 12 becomes a part other than the flat plate-like support part 11 in the leaf spring member 10, that is, a part not in contact with the flooring 50. And the leaf | plate spring member 10 is cantilever supported with respect to the flooring 50 so that the front-end | tip (right end of FIG. 1A) of the vibration part 12 may be made into a free end. The vibration part 12 includes two mass attachment parts 21 and 22, a viscoelastic body attachment part 23, an inclined plate part 24, and two rib-like standing wall parts 25 and 26.

２つのマス取付部２１，２２は、支持部１１および床材５０の裏面から離間し、床材５０の裏面にほぼ平行となるように設けられている。マス取付部２１，２２は、それぞれ細長板状に形成され、先端側に１個ずつの貫通孔２１ａ，２２ａが形成されている。この貫通孔２１ａ，２２ａには、マス部材３０を固定するための締結ボルトが挿通される。このようにして、マス取付部２１，２２の先端側には、マス部材３０が着脱可能に固定される。 The two mass attaching portions 21 and 22 are provided so as to be separated from the support portion 11 and the back surface of the floor material 50 and to be substantially parallel to the back surface of the floor material 50. The mass attaching portions 21 and 22 are each formed in an elongated plate shape, and one through hole 21a and 22a are formed on the tip side. Fastening bolts for fixing the mass member 30 are inserted through the through holes 21a and 22a. In this manner, the mass member 30 is detachably fixed to the distal end sides of the mass attaching portions 21 and 22.

粘弾性体取付部２３は、振動部１２（支持部１１以外の部位）を構成する部材のうちの先端側に位置しており、後述する粘弾性体４０を着脱可能に取り付ける部位である。この粘弾性体取付部２３は、支持部１１の長手方向長さよりも長い長方形板状に形成され、図１Ｂの底面図に示すように、板ばね式制振装置１００を下方から見た場合にマス取付部２１，２２の間に位置に設けられている。この粘弾性体取付部２３は、図１Ａの正面図に示すように、床材５０から離間した位置であって、マス取付部２１，２２に対して床材５０の裏面側に位置し、床材５０の裏面にほぼ平行となるように設けられている。この粘弾性体取付部２３の支持部１１側には、図２Ｂに示すように、瓢箪型貫通孔２３ａが形成されている。つまり、瓢箪型貫通孔２３ａは、マス取付部２１，２２の貫通孔２１ａ，２２ａより支持部１１側に位置している。 The viscoelastic body attaching part 23 is located on the distal end side among members constituting the vibration part 12 (parts other than the support part 11), and is a part to which a viscoelastic body 40 described later is detachably attached. The viscoelastic body mounting portion 23 is formed in a rectangular plate shape longer than the longitudinal length of the support portion 11, and as shown in the bottom view of FIG. 1B, when the leaf spring vibration damping device 100 is viewed from below. It is provided at a position between the mass attaching portions 21 and 22. As shown in the front view of FIG. 1A, the viscoelastic body mounting portion 23 is located away from the flooring 50 and is located on the back side of the flooring 50 with respect to the mass mounting portions 21 and 22. It is provided so as to be substantially parallel to the back surface of the material 50. As shown in FIG. 2B, a bowl-shaped through-hole 23a is formed on the viscoelastic body mounting part 23 on the support part 11 side. That is, the bowl-shaped through hole 23a is located closer to the support portion 11 than the through holes 21a and 22a of the mass attaching portions 21 and 22.

傾斜板部２４は、支持部１１の先端側縁と粘弾性体取付部２３の支持部１１側の縁とを連結している。ここで、支持部１１は床材５０に接触しており、粘弾性体取付部２３は床材５０から離間している。そのため、傾斜板部２４は、床材５０に対して、振動部１２の先端側に行くに従って離間量が大きくなるように傾斜して設けられている。 The inclined plate portion 24 connects the front end side edge of the support portion 11 and the edge of the viscoelastic body mounting portion 23 on the support portion 11 side. Here, the support portion 11 is in contact with the flooring 50, and the viscoelastic body mounting portion 23 is separated from the flooring 50. Therefore, the inclined plate portion 24 is provided so as to be inclined with respect to the flooring 50 so that the separation amount increases toward the distal end side of the vibrating portion 12.

１つのリブ状立壁部２５は、支持部１１の一方の側縁、粘弾性体取付部２３の一方の側縁および傾斜板部２４の一方の側縁と、一方のマス取付部２１の側縁とを連結して、リブ状に形成されている。また、もう１つのリブ状立壁部２６は、支持部１１の他方の側縁、粘弾性体取付部２３の他方の側縁および傾斜板部２４の他方の側縁と、もう１つのマス取付部２２の側縁とを連結して、リブ状に形成されている。 One rib-like standing wall portion 25 includes one side edge of the support portion 11, one side edge of the viscoelastic body attachment portion 23, one side edge of the inclined plate portion 24, and a side edge of the one mass attachment portion 21. Are formed in a rib shape. Another rib-like standing wall portion 26 includes the other side edge of the support portion 11, the other side edge of the viscoelastic body attachment portion 23, the other side edge of the inclined plate portion 24, and another mass attachment portion. It is formed in a rib shape by connecting 22 side edges.

ここで、リブ状立壁部２５，２６を、粘弾性体取付部２３とマス取付部２１，２２とを連結する部位のマス側立壁部２５ａ，２６ａと、支持部１１および傾斜板部２４とマス取付部２１，２２とを連結する部位の支持部側立壁部２５ｂ，２６ｂとに区分する。 Here, the rib-like standing wall portions 25, 26 are connected to the mass side standing wall portions 25 a, 26 a of the portion connecting the viscoelastic body attaching portion 23 and the mass attaching portions 21, 22, the support portion 11, the inclined plate portion 24, and the mass. It divides into the support part side standing wall part 25b, 26b of the site | part which connects the attaching parts 21 and 22. FIG.

つまり、マス側立壁部２５ａ，２６ａは、マス部材３０側に位置しており、振動方向幅を同一に形成されている。また、支持部側立壁部２５ｂ，２６ｂは、支持部１１側に位置しており、振動方向幅をマス側立壁部２５ａ，２６ａの当該幅より大きく形成されている。詳細には、支持部側立壁部２５ｂ，２６ｂの振動方向幅形状は、台形形状に形成されている。つまり、支持部側立壁部２５ｂ，２６ｂは、マス側立壁部２５ａ，２６ａ側から支持部１１側に行くに従って徐々に、振動方向幅が大きくなるように形成されている。 That is, the mass side standing wall portions 25a and 26a are located on the mass member 30 side, and are formed to have the same vibration direction width. Moreover, the support part side standing wall parts 25b and 26b are located in the support part 11 side, and the vibration direction width | variety is formed larger than the said width | variety of the mass side standing wall parts 25a and 26a. Specifically, the width shape in the vibration direction of the support portion side standing wall portions 25b and 26b is formed in a trapezoidal shape. That is, the support portion side standing wall portions 25b and 26b are formed such that the width in the vibration direction gradually increases from the mass side standing wall portions 25a and 26a side toward the support portion 11 side.

粘弾性体４０は、ゴムからなり、粘弾性体取付部２３に固定されると共に、床材５０が主振動方向に振動した場合に床材５０の裏面に対して接触している。具体的には、粘弾性体４０は、本体部４１と、ストッパ部４２とから構成される。 The viscoelastic body 40 is made of rubber, is fixed to the viscoelastic body mounting portion 23, and is in contact with the back surface of the floor material 50 when the floor material 50 vibrates in the main vibration direction. Specifically, the viscoelastic body 40 includes a main body portion 41 and a stopper portion 42.

本体部４１は、逆円錐台形状に形成されている。この円形両端面の距離（端面間距離）は、粘弾性体取付部２３と床材５０の裏面との離間距離にほぼ等しくされている。詳細には、本体部４１の端面間距離は、床材５０の裏面に対して僅かに予圧を加えた状態となるように設定されている。 The main body 41 is formed in an inverted truncated cone shape. The distance between the circular end faces (distance between the end faces) is substantially equal to the distance between the viscoelastic body mounting portion 23 and the back surface of the flooring 50. Specifically, the distance between the end surfaces of the main body 41 is set so that a slight preload is applied to the back surface of the flooring 50.

ストッパ部４２は、本体部４１の大径側端面に設けられ、茸状に形成されている。このストッパ部４２の首部の直径は、粘弾性体取付部２３の瓢箪型貫通孔２３ａの小玉部の直径より僅かに小さくされている。また、ストッパ部４２の先端大径突起部の高さは、ストッパ部４２がマス取付部２１，２２から飛び出さないように設定されている。このストッパ部４２の先端大径突起部の直径は、瓢箪型貫通孔２３ａの大玉部の直径より小さく、かつ、瓢箪型貫通孔２３ａの小玉部の直径より大きくされている。 The stopper portion 42 is provided on the large-diameter side end surface of the main body portion 41 and is formed in a bowl shape. The diameter of the neck portion of the stopper portion 42 is slightly smaller than the diameter of the small ball portion of the bowl-shaped through hole 23 a of the viscoelastic body mounting portion 23. Further, the height of the large-diameter protruding portion at the tip of the stopper portion 42 is set so that the stopper portion 42 does not jump out of the mass attaching portions 21 and 22. The diameter of the large-diameter protrusion at the tip of the stopper portion 42 is smaller than the diameter of the large ball portion of the saddle type through hole 23a and larger than the diameter of the small ball portion of the saddle type through hole 23a.

このように形成される粘弾性体４０は、以下のようにして、粘弾性体取付部２３に固定される。まず、ストッパ部４２の先端大径突起部を粘弾性体取付部２３の瓢箪型貫通孔２３ａの大玉部に挿通する。続いて、粘弾性体４０を瓢箪型貫通孔２３ａの小玉部側にスライドさせる。このとき、粘弾性体４０の本体部４１と、ストッパ部４２の先端大径突起部とにより、粘弾性体取付部２３が挟まれる。このようにして、粘弾性体４０が粘弾性体取付部２３に固定される。 The viscoelastic body 40 formed in this way is fixed to the viscoelastic body mounting portion 23 as follows. First, the tip large-diameter protrusion of the stopper portion 42 is inserted into the large ball portion of the bowl-shaped through hole 23 a of the viscoelastic body mounting portion 23. Subsequently, the viscoelastic body 40 is slid to the small ball portion side of the bowl-shaped through hole 23a. At this time, the viscoelastic body attachment portion 23 is sandwiched between the main body portion 41 of the viscoelastic body 40 and the large-diameter protrusion at the tip of the stopper portion 42. In this way, the viscoelastic body 40 is fixed to the viscoelastic body mounting portion 23.

以上のように構成される板ばね式制振装置１００は、以下のように動作する。床材５０が主振動方向に振動した場合（床材５０に衝撃音が発生した場合を含む）に、板ばね部材１０の振動部１２の弾性力によって、マス部材３０が、床材５０の主振動方向へ振動する。このとき、粘弾性体４０は、常に床材５０の裏面から離間することなく、接触した状態を維持する。つまり、板ばね式制振装置１００は、ダイナミックダンパとして機能する。 The plate spring vibration damping device 100 configured as described above operates as follows. When the floor material 50 vibrates in the main vibration direction (including the case where an impact sound is generated in the floor material 50), the mass member 30 is caused to move to the main material of the floor material 50 by the elastic force of the vibration part 12 of the leaf spring member 10. Vibrates in the vibration direction. At this time, the viscoelastic body 40 is always kept in contact with the viscoelastic body 40 without being separated from the back surface of the flooring 50. That is, the leaf spring vibration damping device 100 functions as a dynamic damper.

詳細には、板ばね部材１０の振動部１２および粘弾性体４０が、ダイナミックダンパのばねとして作用する。特に、板ばね部材１０の振動部１２においては、リブ状立壁部２５，２６の主振動方向の剛性が他の部位の剛性に比べて高いため、リブ状立壁部２５，２６のばね剛性が最も効く状態となる。 Specifically, the vibrating portion 12 and the viscoelastic body 40 of the leaf spring member 10 act as a dynamic damper spring. In particular, in the vibration part 12 of the leaf spring member 10, the rigidity in the main vibration direction of the rib-like standing wall parts 25, 26 is higher than the rigidity of other parts, so that the spring rigidity of the rib-like standing wall parts 25, 26 is the highest. It becomes effective.

従って、板ばね部材１０は、薄板により形成されているとしても、十分なばね剛性を有する。つまり、マス部材３０の有効質量を大きくしつつ、板ばね部材１０の軽量化を図ることができる。ただし、リブ状立壁部２５，２６のうち特にマス側立壁部２５ａ，２６ａの剛性を高くすると、マス部材３０の振幅が小さくなり、結果として振動低減効果が小さくなる。そのため、マス側立壁部２５ａ，２６ａの主振動方向幅を、支持部側立壁部２５ｂ，２６ｂよりも小さくしている。特に、本実施形態においては、マス側立壁部２５ａ，２６ａの主振動方向幅を同一にしており、支持部側立壁部２５ｂ，２６ｂの主振動方向幅は、十分な剛性を確保するために、マス側立壁部２５ａ，２６ａより大きくしている。 Therefore, even if the leaf spring member 10 is formed of a thin plate, the leaf spring member 10 has sufficient spring rigidity. That is, the weight of the leaf spring member 10 can be reduced while increasing the effective mass of the mass member 30. However, when the rigidity of the mass side standing wall portions 25a and 26a among the rib-like standing wall portions 25 and 26 is increased, the amplitude of the mass member 30 is reduced, and as a result, the vibration reducing effect is reduced. Therefore, the main vibration direction width of the mass side standing wall portions 25a and 26a is made smaller than that of the support portion side standing wall portions 25b and 26b. In particular, in the present embodiment, the main vibration direction widths of the mass side standing wall portions 25a and 26a are the same, and the main vibration direction width of the support portion side standing wall portions 25b and 26b is sufficient to ensure sufficient rigidity. It is larger than the mass side standing wall portions 25a, 26a.

ところで、振動低減効果を大きくするためには、マス部材３０を大きく振動させるとよい。そこで、板ばね部材１０の長さを長くすることで、マス部材３０を大きく振動させることができる。しかし、板ばね部材１０が長くなるほど、振動部１２、特にリブ状立壁部２５，２６がねじれる可能性が高くなる。そして、本実施形態において、板ばね部材１０の剛芯（板ばね部材１０のねじり剛性の中心）は、板ばね部材１０の支持部１１付近に位置している。つまり、マス部材３０の重心と板ばね部材１０の剛芯とが、振動部１２の長手方向に大きく離れている。そのため、リブ状立壁部２５，２６が主振動方向のみに振動するのではなく、振動部１２の長手方向の軸回り揺動する状態となるおそれがある。このような動作をしてしまうと、振動低減効果を十分に得ることができない場合がある。 By the way, in order to increase the vibration reduction effect, the mass member 30 may be vibrated greatly. Therefore, by increasing the length of the leaf spring member 10, the mass member 30 can be vibrated greatly. However, the longer the leaf spring member 10 is, the higher the possibility that the vibrating portion 12, particularly the rib-like standing wall portions 25 and 26 are twisted. In the present embodiment, the rigid core of the leaf spring member 10 (the center of the torsional rigidity of the leaf spring member 10) is located in the vicinity of the support portion 11 of the leaf spring member 10. That is, the center of gravity of the mass member 30 and the rigid core of the leaf spring member 10 are greatly separated in the longitudinal direction of the vibrating portion 12. For this reason, the rib-like standing wall portions 25 and 26 may not vibrate only in the main vibration direction, but may swing around the longitudinal axis of the vibration portion 12. If such an operation is performed, the vibration reduction effect may not be sufficiently obtained.

そこで、粘弾性体４０を板ばね部材１０の振動部１２のうち粘弾性体取付部２３に取り付けている。粘弾性体４０をマス側立壁部２５ａ，２６ａのうち支持部側立壁部２５ｂ，２６ｂ側に設置することで、マス部材３０の重心を板ばね式制振装置１００の剛芯（板ばね部材１０および粘弾性体４０のねじり剛性の中心）に近づかせることができ、板ばね部材１０のねじれを抑制できる。従って、確実に、マス部材３０を床材５０の主振動方向に振動させることができ、十分な振動低減効果を発揮する。 Therefore, the viscoelastic body 40 is attached to the viscoelastic body attaching portion 23 in the vibrating portion 12 of the leaf spring member 10. By installing the viscoelastic body 40 on the support side vertical wall portions 25b and 26b side of the mass side standing wall portions 25a and 26a, the mass center of the mass member 30 is set to be a rigid core (plate spring member 10). And the center of the torsional rigidity of the viscoelastic body 40), and the torsion of the leaf spring member 10 can be suppressed. Therefore, the mass member 30 can be reliably vibrated in the main vibration direction of the flooring 50, and a sufficient vibration reduction effect is exhibited.

一方で、粘弾性体４０をマス部材３０の重心に近い位置に取り付けると、マス部材３０の重心と板ばね制振装置１００の剛芯（板ばね部材１０および粘弾性体４０のねじり剛性の中心）が非常に近くなり、マス部材３０を大きく振動させることができなくなる。そこで、粘弾性体４０は、マス側立壁部２５ａ，２６ａのうちマス部材３０側ではなく、支持部側立壁部２５ｂ，２６ｂ側に設置している。これにより、マス側立壁部２５ａ，２６ａのうち支持されていない範囲を長くすることができる。従って、マス部材３０を大きく振動させることができ、振動低減効果を発揮する。 On the other hand, when the viscoelastic body 40 is attached to a position close to the center of gravity of the mass member 30, the center of gravity of the mass member 30 and the rigid core of the leaf spring damping device 100 (the center of the torsional rigidity of the leaf spring member 10 and the viscoelastic body 40). ) Becomes very close, and the mass member 30 cannot be vibrated greatly. Therefore, the viscoelastic body 40 is installed not on the mass member 30 side of the mass side standing wall portions 25a and 26a but on the support portion side standing wall portions 25b and 26b side. Thereby, the range which is not supported among the mass side standing wall parts 25a and 26a can be lengthened. Therefore, the mass member 30 can be vibrated greatly, and a vibration reducing effect is exhibited.

また、上述したように、支持部側立壁部２５ｂ，２６ｂは、マス側立壁部２５ａ，２６ａ側から支持部１１側に行くに従って、主振動方向幅が大きく形成されている。つまり、支持部側立壁部２５ｂ，２６ｂは、マス側立壁部２５ａ，２６ａに比べて、床材５０の主振動方向に対する断面係数が大きい。従って、支持部側立壁部２５ｂ，２６ｂは、マス側立壁部２５ａ，２６ａを確実に支持することができる。このとき、粘弾性体４０は、支持部側立壁部２５ｂ，２６ｂに隣接して設けている。そのため、粘弾性体４０は、支持部側立壁部２５ｂ，２６ｂによる支持力を補強する役割を有する。従って、支持部側立壁部２５ｂ，２６ｂは安定した状態で床材５０に支持される。その結果、支持部側立壁部２５ｂ，２６ｂがねじれることを抑制でき、マス側立壁部２５ａ，２６ａを床材５０の主振動方向に確実に振動させることができる。 Further, as described above, the support portion side standing wall portions 25b and 26b are formed such that the width in the main vibration direction increases from the mass side standing wall portions 25a and 26a toward the support portion 11 side. That is, the support portion side standing wall portions 25b and 26b have a larger section coefficient with respect to the main vibration direction of the flooring 50 than the mass side standing wall portions 25a and 26a. Therefore, the support side vertical walls 25b and 26b can reliably support the mass side vertical walls 25a and 26a. At this time, the viscoelastic body 40 is provided adjacent to the support portion-side standing wall portions 25b and 26b. Therefore, the viscoelastic body 40 has a role of reinforcing the support force by the support portion side standing wall portions 25b and 26b. Accordingly, the support portion side wall portions 25b and 26b are supported by the floor material 50 in a stable state. As a result, it is possible to suppress the support portion side standing wall portions 25 b and 26 b from being twisted, and the mass side standing wall portions 25 a and 26 a can be reliably vibrated in the main vibration direction of the flooring 50.

（板ばね式制振装置を床材に配置した構造）
次に、複数の板ばね式制振装置１００を床材５０に配置する構造について以下に説明する。床材５０の種類として、二種類を例に挙げる。第一の床材は、ＡＬＣ床材などのコンクリート床材を複数設置することによって形成する。第二の床材は、木板により形成する。 (Structure in which leaf spring type damping device is arranged on flooring)
Next, the structure which arrange | positions the several leaf | plate spring type damping device 100 to the flooring 50 is demonstrated below. Two types of flooring materials 50 are given as examples. The first flooring is formed by installing a plurality of concrete flooring such as ALC flooring. The second flooring is formed from a wooden board.

（コンクリート床材に適用した例）
複数のコンクリート床材５１１，５１１，・・・を設置することによって形成される第一の床材５１０について、図３Ａ〜図３Ｃを参照して説明する。床材５１０は、Ｈ型鋼により形成された、床全体の外周を形成する縦梁５１２ａ，５１２ｂおよび横梁５１２ｃ，５１２ｄと、図３Ｂの横梁５１２ｃ，５１２ｄの中央同士を連結する中央梁５１２ｅとを有する。各コンクリート床材５１１，５１１，・・・は、長方形の面材を有する直方体に形成されている。そして、各コンクリート床材５１１，５１１，・・・は、各横梁５１２ｃ，５１２ｄと中央梁５１２ｅとを掛け渡すように、縦方向に並べて配置されている。各コンクリート床材５１１，５１１，・・・の長手方向端を横梁５１２ｃ，５１２ｄおよび中央梁５１２ｅに固定されている。そして、コンクリート床材５１１，５１１，・・・の上面に、石膏ボード５１３およびフローリング材５１４が張られている。 (Example applied to concrete flooring)
A first flooring 510 formed by installing a plurality of concrete flooring 511, 511, ... will be described with reference to FIGS. 3A to 3C. Floor material 510 includes vertical beams 512a and 512b and horizontal beams 512c and 512d that are formed of H-shaped steel and form the outer periphery of the entire floor, and a central beam 512e that connects the centers of the horizontal beams 512c and 512d in FIG. 3B. . Each of the concrete flooring materials 511, 511,... Is formed in a rectangular parallelepiped shape having a rectangular face material. And each concrete flooring 511, 511, ... is arranged along with the lengthwise direction so that each horizontal beam 512c, 512d and the central beam 512e may be spanned. The longitudinal ends of the concrete flooring materials 511, 511,... Are fixed to the horizontal beams 512c, 512d and the central beam 512e. And the gypsum board 513 and the flooring material 514 are stretched | tensioned on the upper surface of concrete flooring 511,511, ....

このような床材５１０は、床材５１０全体が一体的な面材として振動する状態となる。例えば、図３Ｂに示すように、床材５１０の横方向にて２次モードの振動となり、床材５１０の縦方向にて２次または３次モードの振動となる。つまり、床材５１０全体の振動モードは、２次−２次モードまたは２次−３次モードとなる。 Such a flooring 510 is in a state where the entire flooring 510 vibrates as an integral face material. For example, as shown in FIG. 3B, the vibration in the secondary mode occurs in the lateral direction of the flooring 510 and the vibration in the secondary or tertiary mode occurs in the longitudinal direction of the flooring 510. That is, the vibration mode of the entire flooring 510 is a secondary-secondary mode or a secondary-third-order mode.

さらに、各コンクリート床材５１１，５１１，・・・同士は、連結されておらず、ある程度の厚み（一般的に木板床材に比べて厚い厚み）を有するため、各コンクリート床材５１１，５１１，・・・は、独立して振動し得る。つまり、隣接するコンクリート床材５１１，５１１の連続性は僅かながら有しない状態となる。 Further, the concrete floor materials 511, 511,... Are not connected to each other and have a certain degree of thickness (generally thicker than the wood board floor material). ... can vibrate independently. That is, it will be in the state which does not have a little continuity of the adjacent concrete flooring materials 511,511.

このような床材５１０に、図３Ａ〜図３Ｃに示すように、複数の板ばね式制振装置１０１，１０２を配置する。板ばね式制振装置１０１，１０２は、上述した板ばね式制振装置１００の振動低減周波数をそれぞれ異なるようにチューニングしたものであり、実質的に同様の構成からなる。 As shown in FIGS. 3A to 3C, a plurality of leaf spring vibration damping devices 101 and 102 are arranged on such a flooring 510. The leaf spring damping devices 101 and 102 are tuned so that the vibration reduction frequencies of the leaf spring damping device 100 described above are different from each other, and have substantially the same configuration.

具体的には、各コンクリート床材５１１，５１１，・・・の中央付近に、複数（２つ）の板ばね式制振装置１０１，１０２を配置する。コンクリート床材５１１の中央付近は、図３Ｂの下方の振動モード図に示すように、床材５１０全体の２次振動モードの腹付近に位置する。さらには、コンクリート床材５１１の中央付近は、該コンクリート床材５１１単体として見た場合において、単体の振動モードの腹となる。つまり、板ばね式制振装置１０１，１０２の各支持部１１が、床材５１０全体の振動モードの節側よりも腹側、かつ、コンクリート床材５１１単体の振動モードの節側よりも腹側に位置している。 Specifically, a plurality (two) of leaf spring type damping devices 101 and 102 are arranged near the center of each concrete flooring 511, 511,. The vicinity of the center of the concrete flooring 511 is located near the antinode of the secondary vibration mode of the entire flooring 510 as shown in the vibration mode diagram below in FIG. 3B. Further, the vicinity of the center of the concrete flooring 511 becomes an antinode of a single vibration mode when viewed as the concrete flooring 511 alone. That is, the support portions 11 of the leaf spring damping devices 101 and 102 are ventral on the side of the vibration mode of the entire flooring 510 and on the side of the side of the vibration mode of the concrete flooring 511 alone. Is located.

さらに、板ばね式制振装置１０１，１０２の各支持部１１は、各振動部１２の先端（マス部材３０取付位置付近）よりも床材５１０全体の振動モードの腹側に位置し、さらに振動部１２の先端に対して各コンクリート床材５１１の中央側（単体の振動モードの腹側）に位置する。 Further, the support portions 11 of the leaf spring type vibration damping devices 101 and 102 are located on the ventral side of the vibration mode of the entire flooring 510 from the tip of each vibration portion 12 (near the mounting position of the mass member 30), and further vibrate. It is located on the center side (abdominal side of a single vibration mode) of each concrete floor 511 with respect to the tip of the portion 12.

片持ち支持される板ばね式制振装置１０１，１０２は、長さを有するものであって、板ばね部材１０の支持部１１の位置とマス部材３０の位置とは異なっている。ここで、板ばね部材１０の支持部１１を床材５１０の振動モードの節側よりも腹側に位置させることにより、床材５１０が振動する際に、板ばね部材１０全体が大きく振動する状態になる。 The leaf spring type damping devices 101 and 102 that are cantilevered have a length, and the position of the support portion 11 of the leaf spring member 10 and the position of the mass member 30 are different. Here, when the support member 11 of the leaf spring member 10 is positioned on the ventral side of the node side of the vibration mode of the floor material 510, the entire leaf spring member 10 vibrates greatly when the floor material 510 vibrates. become.

特に、板ばね部材１０のうち支持部１１が、振動部１２の先端側よりも、振動モードの腹側に位置するようにしている。つまり、板ばね部材１０が存在する領域の中においても、支持部１１が腹側に位置することになる。そして、板ばね部材１０の振動部１２の振幅は、支持部１１の振幅に依存する。つまり、板ばね部材１０を上記のように配置することで、支持部１１を大きく振動させることができ、結果として、振動部１２を大きく振動させることができる。振動部１２を大きく振動させることができることで、マス部材３０が大きく振動することになり、床材５１０の振動を効果的に低減することができる。従って、重量床衝撃音をより低減することができる。 In particular, the support portion 11 of the leaf spring member 10 is positioned more on the belly side of the vibration mode than the distal end side of the vibration portion 12. That is, the support portion 11 is located on the ventral side even in the region where the leaf spring member 10 exists. The amplitude of the vibration part 12 of the leaf spring member 10 depends on the amplitude of the support part 11. That is, by arranging the leaf spring member 10 as described above, the support portion 11 can be vibrated greatly, and as a result, the vibration portion 12 can be vibrated greatly. Since the vibrating part 12 can be vibrated greatly, the mass member 30 vibrates greatly, and the vibration of the flooring 510 can be effectively reduced. Therefore, the heavy floor impact sound can be further reduced.

そして、板ばね式制振装置１０１，１０２を、床材５１０全体の腹側であって、かつ、各コンクリート床材５１１，５１１，・・・の中央側に設置することで、床材５１０全体の振動を低減しつつ、それぞれのコンクリート床材５１１の異なる振動モードに対応することが可能となる。従って、コンクリート床材５１１により形成される床材５１０に適用した場合に、重量床衝撃音をより低減することができる。 And the leaf spring type vibration damping devices 101 and 102 are installed on the belly side of the entire flooring 510 and on the center side of each concrete flooring 511, 511,. It is possible to cope with different vibration modes of the respective concrete floor materials 511 while reducing the vibration of the concrete floor material 511. Therefore, when applied to the flooring 510 formed by the concrete flooring 511, the heavy floor impact sound can be further reduced.

また、上述したように、各コンクリート床材５１１，５１１，・・・は、長方形の床面を有する。ここで、板ばね式制振装置１０１，１０２は、支持部１１から振動部１２の先端へ向かう方向がコンクリート床材５１１の床面の長手方向に一致するように配置する。このようにすることで、板ばね部材１０の長さを十分に確保することができる。ここで、板ばね部材１０の長さを長くするほど、振動低減効果は高い。つまり、上記のように設置することで、大きな振動低減効果を発揮できる。 Moreover, as above-mentioned, each concrete flooring material 511,511, ... has a rectangular floor surface. Here, the leaf spring vibration damping devices 101 and 102 are arranged so that the direction from the support portion 11 toward the tip of the vibration portion 12 coincides with the longitudinal direction of the floor surface of the concrete floor material 511. By doing in this way, the length of the leaf | plate spring member 10 can fully be ensured. Here, the longer the length of the leaf spring member 10 is, the higher the vibration reducing effect is. That is, by installing as described above, a large vibration reduction effect can be exhibited.

特に、２つの板ばね式制振装置１０１，１０２が、１つのコンクリート床材５１１に配置されている。このとき、１つのコンクリート床材５１１に配置される複数の板ばね式制振装置１０１，１０２同士は、それぞれの支持部１１側を突き合わせるように配置されている。つまり、振動部１２の先端同士の離間距離は、支持部１１同士の離間距離より長く設定されている。このように設置する場合に、複数の板ばね式制振装置１０１，１０２の支持部１１を所望の位置に設置することができ、それぞれが振動低減効果を確実に発揮できる。 In particular, two leaf spring damping devices 101 and 102 are disposed on one concrete floor 511. At this time, the plurality of leaf spring type vibration damping devices 101 and 102 arranged on one concrete floor 511 are arranged so as to abut each of the support portions 11 side. That is, the separation distance between the tips of the vibration parts 12 is set longer than the separation distance between the support parts 11. When installing in this way, the support part 11 of the some leaf | plate spring type damping device 101,102 can be installed in a desired position, and each can exhibit the vibration reduction effect reliably.

また、１枚のコンクリート床材５１１に配置される２つの板ばね式制振装置１０１，１０２の振動低減周波数は、異なる周波数帯に設定されている。例えば、振動低減周波数を４８Ｈｚ付近と５６Ｈｚ付近に設定する。このように設定することで、幅広い周波数帯の振動に対して、振動低減効果を発揮する。この場合の振動低減効果について、図４を参照して説明する。 Further, the vibration reduction frequencies of the two leaf spring damping devices 101 and 102 arranged on one concrete flooring 511 are set to different frequency bands. For example, the vibration reduction frequency is set to around 48 Hz and around 56 Hz. By setting in this way, a vibration reduction effect is exhibited with respect to vibrations in a wide frequency band. The vibration reduction effect in this case will be described with reference to FIG.

図４には、板ばね式制振装置１０１，１０２を配置しない場合（「制振装置なし」：太実線）、５６Ｈｚの振動低減周波数（固有振動数）の制振装置１０１を配置した場合（「固有振動数Ａ」：細二点差線）、４８Ｈｚの振動低減周波数の制振装置１０２を配置した場合（「固有振動数Ｂ」：細実線）、および、２種類の振動低減周波数の制振装置１０１，１０２を配置した場合（「固有振動数Ａ＋Ｂ」：細一点鎖線）を示す。 In FIG. 4, when the leaf spring type damping devices 101 and 102 are not arranged (“no damping device”: thick solid line), when the damping device 101 having a vibration reduction frequency (natural frequency) of 56 Hz is arranged ( “Natural frequency A”: fine two-point difference line), 48 Hz vibration reduction frequency damping device 102 (“natural frequency B”: thin solid line), and two types of vibration reduction frequency damping The case where the devices 101 and 102 are arranged (“natural frequency A + B”: fine one-dot chain line) is shown.

制振装置なしに比べると、２種類の制振装置１０１，１０２を配置した場合には、４８Ｈｚ付近から５６Ｈｚ付近の間全体に亘って振動低減効果を発揮する。ただし、この場合には、１種類の制振装置１０１，１０２を配置した場合に比べると、振動低減効果は小さくなるが、広い範囲において振動低減効果を有することは分かる。 Compared to the case without the vibration damping device, when the two types of vibration damping devices 101 and 102 are arranged, the vibration reducing effect is exhibited over the entire region from around 48 Hz to around 56 Hz. However, in this case, the vibration reduction effect is reduced as compared with the case where one type of damping device 101, 102 is disposed, but it is understood that the vibration reduction effect is provided in a wide range.

＜第二実施形態＞
（木板材に適用した例）
木板により形成された第二の床材５２０について、図５Ａ〜図５Ｃを参照して説明する。ここで、当該床材５２０は、木材により形成された、床全体の外周を形成する縦梁５２２ａ，５２２ｂおよび横梁５２２ｃ，５２２ｄと、図５Ｂの縦梁５２２ａ，５２２ｂを連結する中間横梁５２２ｅ，５２２ｆ，５２２ｇとを有する。３つの中間横梁５２２ｅ，５２２ｆ，５２２ｇにより、外周の梁５２２ａ〜５２２ｄの空間を４等分されている。 <Second embodiment>
(Example applied to wood board)
The 2nd flooring 520 formed with the wooden board is demonstrated with reference to FIG. 5A-FIG. 5C. Here, the floor material 520 is made of wood, and the vertical beams 522a and 522b and the horizontal beams 522c and 522d that form the outer periphery of the entire floor, and the intermediate horizontal beams 522e and 522f that connect the vertical beams 522a and 522b of FIG. 5B. , 522g. The space of the outer peripheral beams 522a to 522d is divided into four equal parts by three intermediate horizontal beams 522e, 522f, and 522g.

そして、図５Ａ，図５Ｃに示すように、梁５２２ａ〜５２２ｇの上面には、合板材５２３が各梁に固定されており、当該合板材５２３の上面に、石膏ボード５２４およびフローリング材５２５が張られている。ここで、合板材５２３は、梁５２２ａ〜５２２ｇにより複数（４つ）に区画されているため、複数の梁区画木板床材５２１，５２１，・・・により形成されていると見ることができる。つまり、各梁区画木板床材５２１，５２１，・・・は、図５Ｂの上下の横梁５２２ｃ、５２２ｄの間に、縦方向に並べて配置されている。 5A and 5C, a plywood member 523 is fixed to each beam on the upper surface of the beams 522a to 522g, and the gypsum board 524 and the flooring material 525 are stretched on the upper surface of the plywood material 523. It has been. Here, since the plywood 523 is divided into a plurality (four) of beams 522a to 522g, it can be seen that the plywood 523 is formed of a plurality of beam-partitioned wood board floor materials 521, 521,. That is, each beam section wood board flooring 521, 521,... Is arranged in the vertical direction between the upper and lower horizontal beams 522c, 522d in FIG.

このような床材５２０は、床材５２０全体が一体的な面材として振動する状態となる。例えば、図５Ｂに示すように、床材５２０の横方向にて２次または３次モードの振動となり、床材５２０の縦方向にて２次または３次モードの振動となる。つまり、床材５２０全体の振動モードは、２次−２次モード、２次−３次モード、３次−２次モードまたは３次−３次モードとなる。 Such a flooring 520 is in a state where the entire flooring 520 vibrates as an integral face material. For example, as shown in FIG. 5B, the vibration of the secondary or tertiary mode is generated in the horizontal direction of the flooring 520, and the vibration of the secondary or tertiary mode is generated in the vertical direction of the flooring 520. That is, the vibration mode of the entire flooring 520 is a secondary-secondary mode, a secondary-third-order mode, a tertiary-secondary mode, or a tertiary-third-order mode.

このような床材５２０に、図５Ａ〜図５Ｃに示すように、複数の板ばね式制振装置１０１，１０２を配置する。板ばね式制振装置１０１，１０２は、上述した板ばね式制振装置１００の振動低減周波数をそれぞれ異なるようにチューニングしたものであり、実質的に同様の構成からなる。 As shown in FIGS. 5A to 5C, a plurality of leaf spring vibration damping devices 101 and 102 are arranged on such a flooring 520. The leaf spring damping devices 101 and 102 are tuned so that the vibration reduction frequencies of the leaf spring damping device 100 described above are different from each other, and have substantially the same configuration.

具体的には、各梁区画木板床材５２１，５２１，・・・を図５Ｂの横方向に４等分した領域の境界付近に、それぞれ複数（２つ）の板ばね式制振装置１０１，１０２を配置する。各梁区画木板床材５２１，５２１，・・・に配置される３箇所は、図５Ｂの下方の振動モード図に示すように、床材５２０全体の３次振動モードの腹付近に位置する。 More specifically, a plurality of (two) leaf spring type vibration damping devices 101, near the boundary of the region obtained by dividing each beam section wood board flooring 521, 521,. 102 is arranged. As shown in the vibration mode diagram in the lower part of FIG. 5B, the three places arranged on each beam section wood board flooring 521, 521,... Are located near the belly of the tertiary vibration mode of the entire flooring 520.

片持ち支持される板ばね式制振装置１０１，１０２は、長さを有するものであって、板ばね部材１０の支持部１１の位置とマス部材３０の位置とは異なっている。ここで、板ばね部材１０の支持部１１を床材５２０の振動モードの節側よりも腹側に位置させることにより、床材５２０が振動する際に、板ばね部材１０全体が大きく振動する状態になる。 The leaf spring type damping devices 101 and 102 that are cantilevered have a length, and the position of the support portion 11 of the leaf spring member 10 and the position of the mass member 30 are different. Here, when the flooring member 520 vibrates by positioning the support portion 11 of the leaf spring member 10 on the ventral side rather than the node side of the vibration mode of the flooring 520, the whole leaf spring member 10 vibrates greatly. become.

特に、板ばね部材１０のうち支持部１１が、振動部１２の先端側よりも、振動モードの腹側に位置するようにしている。つまり、板ばね部材１０が存在する領域の中においても、支持部１１が腹側に位置することになる。そして、板ばね部材１０の振動部１２の振幅は、支持部１１の振幅に依存する。つまり、板ばね部材１０を上記のように配置することで、支持部１１を大きく振動させることができ、結果として、振動部１２を大きく振動させることができる。振動部１２を大きく振動させることができることで、マス部材３０が大きく振動することになり、床材５２０の振動を効果的に低減することができる。従って、重量床衝撃音をより低減することができる。 In particular, the support portion 11 of the leaf spring member 10 is positioned more on the belly side of the vibration mode than the distal end side of the vibration portion 12. That is, the support portion 11 is located on the ventral side even in the region where the leaf spring member 10 exists. The amplitude of the vibration part 12 of the leaf spring member 10 depends on the amplitude of the support part 11. That is, by arranging the leaf spring member 10 as described above, the support portion 11 can be vibrated greatly, and as a result, the vibration portion 12 can be vibrated greatly. Since the vibration part 12 can be vibrated greatly, the mass member 30 vibrates greatly, and the vibration of the flooring 520 can be effectively reduced. Therefore, the heavy floor impact sound can be further reduced.

また、合板（木板床材）を複数の梁５２２ａ〜５２２ｇにより連結される床材５２０は、床材５２０全体としての上述した振動モードを有するが、それぞれの梁区画木板床材５２１，５２１，・・・個別の振動モードを有する場合がある。そして、板ばね式制振装置１０１，１０２を、床材５２０全体の腹側であって、かつ、各梁区画木板床材５２１，５２１，・・・の中央側に設置することで、床材５２０全体の振動を低減しつつ、それぞれの梁区画木板床材５２１，５２１，・・・の異なる振動モードに対応することが可能となる。従って、梁区画木板床材５２１，５２１，・・・により形成される床材５２０に適用した場合に、重量床衝撃音をより低減することができる。 In addition, the flooring 520 in which the plywood (wood board flooring) is connected by the plurality of beams 522a to 522g has the above-described vibration mode as the entire flooring 520, but each beam section wood board flooring 521, 521,.・・ There may be individual vibration modes. And the leaf | plate spring type damping device 101,102 is the belly side of the whole flooring 520, and is installed in the center side of each beam division wood board flooring 521,521, ..., flooring It becomes possible to cope with different vibration modes of the respective beam section wood board flooring materials 521, 521, ... while reducing the vibration of the entire 520. Therefore, when it applies to the flooring 520 formed with the beam division wood board flooring 521,521, ..., a heavy floor impact sound can be reduced more.

また、梁区画木板床材５２１，５２１，・・・は、長方形の床面を有し、板ばね式制振装置１０１，１０２は、支持部１１から振動部１２の先端へ向かう方向が梁区画木板床材５２１，５２１，・・・の床面の長手方向に一致するように配置される。このようにすることで、板ばね部材１０の長さを十分に確保することができる。ここで、板ばね部材１０の長さを長くするほど、振動低減効果は高い。つまり、上記のように設置することで、大きな振動低減効果を発揮できる。 Further, the beam section wood board floor materials 521, 521,... Have a rectangular floor surface, and the leaf spring type vibration damping devices 101, 102 have a beam section in a direction from the support portion 11 toward the tip of the vibration portion 12. It arrange | positions so that it may correspond with the longitudinal direction of the floor surface of wood board flooring 521,521, .... By doing in this way, the length of the leaf | plate spring member 10 can fully be ensured. Here, the longer the length of the leaf spring member 10 is, the higher the vibration reducing effect is. That is, by installing as described above, a large vibration reduction effect can be exhibited.

特に、複数の板ばね式制振装置１０１，１０２が、１つの梁区画木板床材５２１に配置されている。このとき、１つの梁区画木板床材５２１に配置される複数の板ばね式制振装置１０１，１０２において、振動部１２の先端同士の離間距離は、支持部１１同士の離間距離より長く設定されている。１つの梁区画木板床材５２１に複数の板ばね式制振装置１０１，１０２を設置する場合に、複数の板ばね式制振装置１０１，１０２の支持部１１を所望の位置に設置することができ、それぞれが振動低減効果を確実に発揮できる。 In particular, a plurality of leaf spring damping devices 101 and 102 are arranged on one beam section wood board flooring 521. At this time, in the plurality of leaf spring vibration damping devices 101 and 102 arranged on one beam section wood board flooring 521, the distance between the tips of the vibration parts 12 is set longer than the distance between the support parts 11. ing. When installing a plurality of leaf spring type damping devices 101, 102 on one beam section wood board flooring 521, it is possible to install the support portions 11 of the plurality of leaf spring type damping devices 101, 102 at desired positions. Each of which can reliably exhibit vibration reduction effects.

また、１つの梁区画木板床材５２１に配置される複数の板ばね式制振装置１０１，１０２の振動低減周波数は、異なる周波数帯に設定されている。例えば、振動低減周波数を４８Ｈｚ付近と５６Ｈｚ付近に設定する。このように設定することで、幅広い周波数帯の振動に対して、振動低減効果を発揮する。 Moreover, the vibration reduction frequency of the several leaf | plate spring type damping devices 101 and 102 arrange | positioned at one beam division wood board flooring 521 is set to a different frequency band. For example, the vibration reduction frequency is set to around 48 Hz and around 56 Hz. By setting in this way, a vibration reduction effect is exhibited with respect to vibrations in a wide frequency band.

１０：板ばね部材、１１：支持部、１２：振動部、２５，２６：リブ状立壁部、２５ａ，２６ａ：マス側立壁部、２５ｂ，２６ｂ：支持部側立壁部、３０：マス部材、４０：粘弾性体、５０，５１０，５２０：床材、１００，１０１，１０２：板ばね式制振装置、５１１：コンクリート床材、５１２ａ〜５１２ｅ：梁、５２１：梁区画木板床材、５２２ａ〜５２２ｇ：梁 10: leaf spring member, 11: support part, 12: vibration part, 25, 26: rib-like standing wall part, 25a, 26a: mass side standing wall part, 25b, 26b: support part side standing wall part, 30: mass member, 40 : Viscoelastic body, 50, 510, 520: Floor material, 100, 101, 102: Leaf spring type damping device, 511: Concrete floor material, 512a to 512e: Beam, 521: Beam section wood board floor material, 522a to 522g : Beam

Claims

A floor structure in which leaf spring damping devices are arranged on the floor material
The leaf spring damping device is
A leaf spring member having a support portion fixed to the floor material, and a vibration portion capable of vibrating with respect to the floor material;
A mass member attached to the vibrating portion of the leaf spring member;
With
The leaf spring member is cantilevered with respect to the flooring so that the tip of the vibration part is a free end,
The support portion is positioned on the ventral side of the node side of the vibration mode of the flooring, and is positioned on the ventral side of the tip of the vibration unit ;
The flooring is formed by installing a plurality of concrete flooring,
The leaf spring vibration damping device is disposed on each concrete floor material constituting the plurality of concrete floor materials,
The said support part is a floor structure located in the center side of each said concrete floor material with respect to the front-end | tip of the said vibration part .

The concrete flooring has a rectangular floor surface,
2. The floor structure according to claim 1 , wherein the leaf spring vibration damping device is disposed such that a direction from the support portion toward a tip of the vibration portion coincides with a longitudinal direction of a floor surface of the concrete floor material.

A plurality of the leaf spring type damping devices are arranged on one concrete floor material,
A plurality of said plate spring damping device which is arranged in one of the concrete flooring, the distance between the tips of the vibrating portion, the support portion is spaced a distance longer than setting between claim 1 or 2 floor structure.

A floor structure in which leaf spring damping devices are arranged on the floor material
The leaf spring damping device is
A leaf spring member having a support portion fixed to the floor material, and a vibration portion capable of vibrating with respect to the floor material;
A mass member attached to the vibrating portion of the leaf spring member;
With
The leaf spring member is cantilevered with respect to the flooring so that the tip of the vibration part is a free end,
The support portion is positioned on the ventral side of the node side of the vibration mode of the flooring, and is positioned on the ventral side of the tip of the vibration unit;
The flooring is a wooden board, and is formed by installing a plurality of beam sectioning wooden board flooring sections partitioned by beams,
The leaf spring type vibration damping device is disposed on each beam section wood board floor material constituting the plurality of beam section wood board floor materials,
The said support part is a floor structure located in the center side of each said beam division wood board floor material with respect to the front-end | tip of the said vibration part.

The beam section wood board flooring has a rectangular floor surface,
The floor structure according to claim 4 , wherein the leaf spring vibration damping device is arranged so that a direction from the support portion toward a tip of the vibration portion coincides with a longitudinal direction of a floor surface of the beam section wood board flooring.

A plurality of the leaf spring type damping devices are arranged on one beam section wood board floor material,
A plurality of said plate spring damping device which is arranged in one of the beam sections tree Itadoko material, the distance between the tips of the vibrating portion is longer than the distance between the supporting part, claim 4 or 5 floor structure.

The floor structure according to claim 3 or 6 , wherein vibration reduction frequencies of the plurality of leaf spring damping devices are set in different frequency bands.

The vibration portion of the leaf spring member includes a rib-like standing wall portion that connects the support portion and a portion to which the mass member is attached in a rib shape,
The rib-like standing wall portion is
A mass-side standing wall portion that is located on the mass member side and has the same vibration direction width, and
A support portion-side standing wall portion that is located on the support portion side and is formed with a vibration direction width larger than a vibration direction width of the mass-side standing wall portion;
With
The plate spring damping device is fixed to the support part side vertical wall portion of the mass-side vertical wall portion, and a viscoelastic member provided in contact with the flooring, of the preceding claims Any one of the floor structures.

The support portion-side standing wall portion is formed such that a vibration direction width increases as it goes from the mass-side standing wall portion side to the support portion side,
The floor structure according to claim 8 , wherein the viscoelastic body is provided adjacent to the support portion side standing wall portion.

The floor structure according to claim 8 or 9 , wherein the support portion is located on the ventral side of the vibration mode of the flooring material with respect to the viscoelastic body.

A leaf spring member that has a support portion fixed to a floor material and a vibration portion that can vibrate with respect to the floor material, and is cantilevered with respect to the floor material so that a tip of the vibration portion is a free end. When,
A mass member attached to the vibrating portion of the leaf spring member;
A viscoelastic body fixed to the vibrating portion and provided to contact the flooring;
A leaf spring type vibration damping device comprising:
The vibration portion of the leaf spring member includes a rib-like standing wall portion that connects the support portion and a portion to which the mass member is attached in a rib shape,
The rib-like standing wall portion is
A mass-side standing wall portion that is located on the mass member side and has the same vibration direction width, and
A support portion-side standing wall portion that is located on the support portion side and is formed with a vibration direction width larger than a vibration direction width of the mass-side standing wall portion;
With
The viscoelastic body is a leaf spring vibration damping device that is fixed to the support side vertical wall side of the mass side vertical wall.