JP6013766B2

JP6013766B2 - Vibration isolator

Info

Publication number: JP6013766B2
Application number: JP2012097844A
Authority: JP
Inventors: 征彦田坂
Original assignee: 株式会社創和設計
Priority date: 2012-04-23
Filing date: 2012-04-23
Publication date: 2016-10-25
Anticipated expiration: 2032-04-23
Also published as: JP2013224563A

Description

本発明は、対象物の振動が該対象物を支持する支持側に伝わるのを防止する防振装置に関する。 The present invention relates to a vibration isolator that prevents vibration of an object from being transmitted to a support side that supports the object.

従来より、対象物の振動が該対象物を支持する支持側に伝わるのを防止する防振装置が知られている。このような防振装置として、例えば特許文献１に開示されるように、二重床の上床を、ゴムなどの弾性材によって弾性的に支持する防振具が知られている。この防振具は、下床上に配置されていて、上床の下側に固定された支持ボルトを弾性的に支持する。 2. Description of the Related Art Conventionally, a vibration isolator that prevents a vibration of an object from being transmitted to a support side that supports the object is known. As such a vibration isolator, for example, as disclosed in Patent Document 1, a vibration isolator that elastically supports an upper floor of a double floor with an elastic material such as rubber is known. The vibration isolator is disposed on the lower floor and elastically supports a support bolt fixed to the lower side of the upper floor.

また、他の防振装置の構成として、例えば特許文献２に開示されるように、コンクリートスラブ上に防振ゴムを配置し、その上に制震ボード及び床材等を配置した構成も知られている。 As another configuration of the vibration isolator, for example, as disclosed in Patent Document 2, a configuration in which a vibration isolating rubber is disposed on a concrete slab and a vibration damping board and a flooring are disposed thereon is also known. ing.

特開２０１１−２４６９０６号公報JP 2011-246906 A 特開２００７−１０７２０９号公報JP 2007-107209 A

ところで、前記特許文献１のように床下に配置される防振装置の場合、床上で人が飛び跳ねた際に生じる低い振動数の振動を低減しようとすると、防振装置の弾性部材を、容易に変形可能な構成にする必要がある。しかしながら、前記特許文献１のようなゴムの塊を防振装置に用いた場合、上床などの軽い荷重が付加された状態では低い振動数の振動に対して十分なゴムの変形が得られず、低い振動数の振動を低減できない可能性がある。 By the way, in the case of the vibration isolator arranged under the floor as in Patent Document 1, if an attempt is made to reduce the low frequency vibration that occurs when a person jumps on the floor, the elastic member of the vibration isolator can be easily It is necessary to have a deformable configuration. However, when a lump of rubber as in Patent Document 1 is used in a vibration isolator, sufficient rubber deformation cannot be obtained with respect to low frequency vibration in a state where a light load such as an upper floor is applied, There is a possibility that low frequency vibrations cannot be reduced.

そのため、前記特許文献２のように、防振装置上に重量ボードまたはコンクリート等の重量の大きい下地を形成して、防振装置に所定の初期荷重を付加するようにしている。 Therefore, as in Patent Document 2, a heavy ground such as a heavy board or concrete is formed on the vibration isolator, and a predetermined initial load is applied to the vibration isolator.

このように、低い振動数の振動を吸収可能な防振装置を床下に設置しようとすると、防振装置上に重量の大きい下地を形成する必要があるため、防振装置の設置工事が複雑になるとともに、大規模な工事が必要になる。 In this way, if an anti-vibration device that can absorb vibrations at a low frequency is to be installed under the floor, it is necessary to form a heavy ground on the anti-vibration device, so the installation work of the anti-vibration device is complicated. In addition, large-scale construction is required.

そのため、本発明の目的は、低い振動数の振動を低減することができ且つ簡単な工事によって設置可能な防振装置の構成を得ることにある。 Therefore, an object of the present invention is to obtain a configuration of a vibration isolator that can reduce vibrations having a low frequency and can be installed by simple construction.

本発明の一実施形態に係る防振装置は、柱状の積層体を備え、前記積層体は、平板状に形成された複数の弾性部材と、前記複数の弾性部材よりも大きい縦弾性係数を有する平板部材とを有し、前記平板部材は、前記複数の弾性部材に対し、弾性部材と弾性部材との間に挟み込まれるように配置され、前記複数の弾性部材のうち少なくとも一つの弾性部材は、その厚み方向の少なくとも一面に凹部を有する（第１の構成）。 A vibration isolator according to an embodiment of the present invention includes a columnar laminated body, and the laminated body has a plurality of elastic members formed in a flat plate shape and a longitudinal elastic modulus larger than that of the plurality of elastic members. A flat plate member, and the flat plate member is disposed so as to be sandwiched between the elastic member and the elastic member with respect to the plurality of elastic members, and at least one elastic member of the plurality of elastic members is: A recess is provided on at least one surface in the thickness direction (first configuration).

以上の構成では、平板状に形成された弾性部材と該弾性部材よりも縦弾性係数が大きい平板部材とが厚み方向に交互に積層されるため、積層体に対して積層方向に力が入力された際に弾性部材が変形を生じやすくなる。これにより、防振装置によって、低い振動数の振動を低減することが可能となる。しかも、複数の弾性部材のうち少なくとも一つの弾性部材は、厚み方向の少なくとも一面に凹部を有するため、該弾性部材の表面積を増大させることができる。よって、弾性部材がより変形を生じやすくなり、より低い振動数の振動を低減可能な防振装置が得られる。 In the above configuration, since the elastic member formed in a flat plate shape and the flat plate member having a longitudinal elastic modulus larger than that of the elastic member are alternately stacked in the thickness direction, a force is input to the stacked body in the stacking direction. The elastic member is likely to be deformed. Thereby, it becomes possible to reduce the vibration of a low frequency with a vibration isolator. Moreover, since at least one elastic member among the plurality of elastic members has a recess on at least one surface in the thickness direction, the surface area of the elastic member can be increased. Therefore, the elastic member is more likely to be deformed, and a vibration isolator capable of reducing vibrations having a lower frequency is obtained.

前記第１の構成において、前記凹部は、前記積層体における積層方向の剛性が、前記積層体の積層方向から見て該積層体の全周で同等になるように、前記少なくとも一つの弾性部材に形成されているのが好ましい（第２の構成）。 In the first configuration, the concave portion is formed on the at least one elastic member so that rigidity in the stacking direction of the stacked body is equal over the entire periphery of the stacked body when viewed from the stacking direction of the stacked body. It is preferably formed (second configuration).

これにより、防振装置の積層体に対し、該積層体の積層方向に力が加わった場合に、積層体はその全周で均一に積層方向の変形を生じる。したがって、安定して所定の振動低減特性が得られる防振装置を実現できる。 Thereby, when a force is applied to the laminated body of the vibration isolator in the lamination direction of the laminated body, the laminated body is uniformly deformed in the lamination direction on the entire circumference thereof. Therefore, it is possible to realize a vibration isolator that can stably obtain a predetermined vibration reduction characteristic.

ここで、積層体における積層方向の剛性が該積層体の全周で同等とは、剛性が等しい場合だけでなく、積層体が全周で積層方向に均一な変形が生じるような剛性の範囲を意味する。 Here, the rigidity of the laminated body in the stacking direction is the same throughout the entire circumference of the laminated body, not only when the rigidity is the same, but also within a range of rigidity that causes uniform deformation of the laminated body in the stacking direction over the entire circumference. means.

前記第１または第２の構成において、前記凹部は、前記少なくとも一つの弾性部材の厚み方向の両面に形成されているのが好ましい（第３の構成）。 In the first or second configuration, the recess is preferably formed on both surfaces in the thickness direction of the at least one elastic member (third configuration).

こうすることで、弾性部材を厚み方向により容易に変形させることができる。したがって、より低い振動数の振動を低減可能な防振装置が得られる。 By doing so, the elastic member can be easily deformed in the thickness direction. Therefore, a vibration isolator capable of reducing vibrations having a lower frequency can be obtained.

前記第１から第３の構成のうちいずれか一つの構成において、前記凹部は、溝部を含むのが好ましい（第４の構成）。これにより、弾性部材に、該弾性部材の変形を容易にする凹部を連続して形成することができる。よって、弾性部材を容易に変形させることが可能になる。 In any one of the first to third configurations, the concave portion preferably includes a groove (fourth configuration). Thereby, the recessed part which makes a deformation | transformation of this elastic member easy can be continuously formed in an elastic member. Therefore, the elastic member can be easily deformed.

前記第４の構成において、前記凹部は、互いに平行に形成された複数の直線状の溝部を含むのが好ましい（第５の構成）。こうすることで、弾性部材全体を厚み方向により容易に変形させることができる。 In the fourth configuration, it is preferable that the concave portion includes a plurality of linear grooves formed in parallel to each other (fifth configuration). By doing so, the entire elastic member can be easily deformed in the thickness direction.

前記第４または第５の構成において、前記積層体は、複数の平板部材を有し、前記複数の弾性部材は、それぞれ、前記溝部を有し、前記複数の弾性部材は、前記積層体の積層方向から見て、前記複数の平板部材のうち一つの平板部材を挟んで配置される一対の弾性部材にそれぞれ形成された溝部同士がなす角度と、前記複数の平板部材のうち他の平板部材を挟んで配置される一対の弾性部材にそれぞれ形成された溝部同士がなす角度とが、同等になるように配置されているのが好ましい（第６の構成）。 In the fourth or fifth configuration, the stacked body includes a plurality of flat plate members, the plurality of elastic members each include the groove portion, and the plurality of elastic members are stacked in the stacked body. When viewed from the direction, the angle formed by the grooves formed in each of the pair of elastic members arranged with one flat plate member sandwiched between the plurality of flat plate members, and the other flat plate member among the plurality of flat plate members. It is preferable that the angles formed by the groove portions formed in the pair of elastic members that are sandwiched by each other are the same (sixth configuration).

これにより、各弾性部材の厚み方向の少なくとも一面に直線状の溝部を設けた場合でも、積層体における積層方向の剛性を、該積層体の積層方向から見て該積層体の全周でほぼ等しくすることが可能となる。よって、上述の構成により、直線状の溝部を設けた場合でも、安定して所定の振動低減特性が得られる防振装置を実現できる。 Thus, even when a linear groove is provided on at least one surface in the thickness direction of each elastic member, the rigidity in the stacking direction of the stacked body is substantially equal over the entire circumference of the stacked body as viewed from the stacking direction of the stacked body. It becomes possible to do. Therefore, with the above-described configuration, it is possible to realize a vibration isolator that can stably obtain a predetermined vibration reduction characteristic even when a linear groove is provided.

前記第４または第５の構成において、前記溝部は、前記少なくとも一つの弾性部材の厚み方向の両面に形成されていて、前記弾性部材の厚み方向の一側の面に形成された溝部は、前記積層体の積層方向から見て、前記弾性部材の厚み方向の他側の面に形成された溝部に対して交差しているのが好ましい（第７の構成）。 In the fourth or fifth configuration, the groove is formed on both surfaces in the thickness direction of the at least one elastic member, and the groove formed on one surface in the thickness direction of the elastic member is As viewed from the stacking direction of the stacked body, it is preferable to intersect the groove formed on the other surface in the thickness direction of the elastic member (seventh configuration).

これにより、弾性部材の一側の面のみに溝を設ける構成に比べて、弾性部材の厚み方向の剛性のばらつきを低減できる。したがって、積層体の積層方向の剛性のばらつきを低減することができ、より安定して所定の振動低減特性が得られる防振装置を実現できる。 Thereby, the dispersion | variation in the rigidity of the thickness direction of an elastic member can be reduced compared with the structure which provides a groove | channel only in the surface of one side of an elastic member. Therefore, it is possible to reduce the variation in rigidity in the stacking direction of the stacked body, and to realize a vibration isolator capable of obtaining a predetermined vibration reducing characteristic more stably.

前記第１から第７の構成のうちいずれか一つの構成において、前記積層体は、前記複数の弾性部材及び前記平板部材を貫通する貫通孔を有するのが好ましい（第８の構成）。 In any one of the first to seventh configurations, it is preferable that the stacked body has a through-hole penetrating the plurality of elastic members and the flat plate member (eighth configuration).

これにより、積層体が力を受ける受圧面積を増大させることなく、積層体が座屈を生じないように該積層体の外径を大きくすることができる。すなわち、積層体の外径が小さいと、座屈を生じやすい。一方、座屈防止のために積層体の外径を大きくすると、積層体の受圧面積が大きくなって積層体が変形しにくくなる。これに対し、上述の構成のように、積層体を、貫通穴を有する形状とすることで、座屈しないような外径にしつつ、積層体の弾性部材を容易に変形させることが可能となる。よって、上述の構成により、積層体の座屈防止と、低い振動数の振動低減とを両立させることができる。 Thus, the outer diameter of the laminate can be increased so that the laminate does not buckle without increasing the pressure receiving area where the laminate receives force. That is, if the outer diameter of the laminate is small, buckling is likely to occur. On the other hand, when the outer diameter of the laminated body is increased in order to prevent buckling, the pressure receiving area of the laminated body is increased and the laminated body is not easily deformed. On the other hand, the elastic member of the laminated body can be easily deformed while having an outer diameter that does not buckle by forming the laminated body with a through-hole as in the above-described configuration. . Therefore, with the above-described configuration, it is possible to achieve both prevention of buckling of the laminate and reduction of vibration at a low frequency.

前記第８の構成において、前記積層体の積層方向の両端に位置する一対の支持板と、前記支持板同士を前記積層体の前記貫通孔内で接続する接続部材と、前記接続部材と前記一対の支持板の少なくとも一方との間に配置され、前記一対の支持板間での振動の伝達を抑制する振動抑制部材とをさらに備えるのが好ましい（第９の構成）。 In the eighth configuration, a pair of support plates positioned at both ends in the stacking direction of the laminate, a connection member that connects the support plates to each other in the through hole of the laminate, the connection member, and the pair It is preferable to further include a vibration suppressing member that is disposed between at least one of the support plates and suppresses transmission of vibration between the pair of support plates (ninth configuration).

弾性部材を含む積層体に対して圧縮方向に大きな衝撃力を加えると、その反動で積層体を構成する弾性部材及び平板部材が積層方向に分離する可能性がある。これに対し、上述の構成のように、積層体の積層方向の両端に位置する一対の支持板同士を接続部材によって接続することにより、積層体の弾性部材及び平板部材が互いに積層方向に分離するのを防止できる。よって、積層体に圧縮方向に加わった衝撃の反動で、積層体の弾性部材及び平板部材が積層方向に分離するのを防止できる。 When a large impact force is applied to the laminated body including the elastic member in the compression direction, there is a possibility that the elastic member and the flat plate member constituting the laminated body are separated in the lamination direction due to the reaction. On the other hand, the elastic member and the flat plate member of the laminated body are separated from each other in the laminating direction by connecting the pair of support plates positioned at both ends in the laminating direction of the laminated body with the connecting members as in the above-described configuration. Can be prevented. Therefore, it can prevent that the elastic member and flat plate member of a laminated body isolate | separate to a lamination direction by reaction of the impact applied to the laminated body in the compression direction.

しかも、接続部材と一対の支持板の少なくとも一方との間には、振動抑制部材が配置されているため、接続部材を介して一対の支持板間で振動が伝わるのを防止できる。 Moreover, since the vibration suppressing member is disposed between the connection member and at least one of the pair of support plates, it is possible to prevent vibration from being transmitted between the pair of support plates via the connection member.

前記第９の構成において、前記一対の支持板のうち少なくとも一方の支持板は、前記積層体の貫通孔の内方に向かって延びる支持部を有し、前記接続部材は、前記支持部と他方の支持板とを接続するのが好ましい（第１０の構成）。 In the ninth configuration, at least one of the pair of support plates has a support portion extending inward of the through hole of the stacked body, and the connection member includes the support portion and the other support member. It is preferable to connect the support plate (tenth configuration).

これにより、積層体の弾性部材及び平板部材が該積層体の積層方向と交差する方向に移動するのを、支持部によって防止できる。したがって、積層体が積層方向と交差する方向に崩れるのを、支持部によって防止できる。 Thereby, it can prevent by a support part that the elastic member and flat plate member of a laminated body move to the direction which cross | intersects the lamination direction of this laminated body. Therefore, it can prevent by a support part that a laminated body collapses in the direction which cross | intersects a lamination direction.

しかも、上述の構成により、支持部と他方の支持板とを、支持部を設けない場合に用いる接続部材よりも短い接続部材によって接続することができる。 Moreover, with the above-described configuration, the support portion and the other support plate can be connected by a connection member that is shorter than the connection member used when the support portion is not provided.

前記第９の構成において、前記一対の支持板は、それぞれ、前記積層体の前記貫通孔の内方に向かって延びる支持部を有し、前記一対の支持板のうち一方の支持板に設けられた支持部は、他方の支持板に設けられた支持部との干渉を防止するための凹部を有するのが好ましい（第１１の構成）。 In the ninth configuration, each of the pair of support plates has a support portion extending inward of the through hole of the stacked body, and is provided on one of the pair of support plates. It is preferable that the support portion has a recess for preventing interference with the support portion provided on the other support plate (11th configuration).

これにより、一対の支持板にそれぞれ設けられた支持部によって、積層体の弾性部材及び平板部材が該積層体の積層方向と交差する方向に移動するのを防止できる。よって、一つの支持部で積層体の内面を支える構成に比べて、支持部の長さを短くすることができる。 Thereby, it can prevent that the elastic member and flat plate member of a laminated body move to the direction which cross | intersects the lamination direction of this laminated body by the support part each provided in a pair of support plate. Therefore, the length of the support portion can be shortened compared to the configuration in which the inner surface of the laminate is supported by one support portion.

また、一方の支持板に設けられた支持部に凹部を設けることで、一対の支持板にそれぞれ設けられた支持部同士が干渉するのを防止できる。 Moreover, it can prevent that the support parts each provided in a pair of support plate interfere by providing a recessed part in the support part provided in one support plate.

前記第１から第１１の構成のうちいずれか一つの構成において、防振装置は、乾式二重床の上床と下床との間に配置されるのが好ましい（第１２の構成）。 In any one of the first to eleventh configurations, the vibration isolator is preferably arranged between the upper floor and the lower floor of the dry double floor (a twelfth configuration).

上床の重量が比較的軽い乾式二重床の場合でも、第１から第１１の構成を有する防振装置によって、低い振動数の振動を除去することができる。 Even in the case of a dry double floor where the weight of the upper floor is relatively light, vibrations having a low frequency can be removed by the vibration isolator having the first to eleventh configurations.

本発明の一実施形態に係る防振装置によれば、平板状に形成された弾性部材と平板部材とを交互に積層することにより積層体を構成するとともに、少なくとも一つの弾性部材は厚み方向の少なくとも一面に凹部を有する。これにより、弾性部材を容易に変形させることができ、積層体の圧縮荷重が小さい場合でも、低い振動数の振動を効率良く低減することができる。したがって、低い振動数の振動を低減可能で且つ簡単な工事で設置可能な防振装置が得られる。 According to the vibration isolator which concerns on one Embodiment of this invention, while forming a laminated body by laminating | stacking alternately the elastic member and flat plate member which were formed in flat form, at least 1 elastic member is thickness direction. At least one surface has a recess. Thereby, the elastic member can be easily deformed, and even when the compressive load of the laminate is small, it is possible to efficiently reduce the vibration having a low frequency. Therefore, the vibration isolator which can reduce the vibration of a low frequency and can be installed by simple construction is obtained.

図１は、本発明の一実施形態に係る防振装置の全体構成を示す斜視図である。FIG. 1 is a perspective view showing an overall configuration of a vibration isolator according to an embodiment of the present invention. 図２は、防振装置を乾式二重床内に設置した状態を示す乾式二重床の断面図である。FIG. 2 is a cross-sectional view of the dry double floor showing a state in which the vibration isolator is installed in the dry double floor. 図３は、図１におけるＩＩＩ−ＩＩＩ線断面図である。3 is a cross-sectional view taken along line III-III in FIG. 図４は、それぞれ、（ａ）ゴム板の上面図、（ｂ）ゴム板の側面図である。4A and 4B are (a) a top view of the rubber plate and (b) a side view of the rubber plate, respectively. 図５は、積層体の上面図において、各ゴム板に形成された溝部の延びる方向をそれぞれ矢印で示した図である。FIG. 5 is a diagram showing the extending direction of the groove formed in each rubber plate with arrows in the top view of the laminate. 図６は、上側支持部と下側支持部との位置関係を示す防振装置の上面図である。FIG. 6 is a top view of the vibration isolator showing the positional relationship between the upper support portion and the lower support portion. 図７は、防振装置の分解斜視図である。FIG. 7 is an exploded perspective view of the vibration isolator.

以下、図面を参照し、本発明の実施の形態を詳しく説明する。図中の同一または相当部分については同一の符号を付してその説明は繰り返さない。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The same or corresponding parts in the drawings are denoted by the same reference numerals and description thereof will not be repeated.

（全体構成）
図１は、本発明の実施形態に係る防振装置１の概略構成示す図である。この防振装置１は、図２に示すように、例えば乾式二重床２に用いられる。具体的には、防振装置１は、乾式二重床２の下床３と上床４との間に配置され、上床４を下床３に対して弾性支持する。なお、防振装置１は、例えばコンクリート製の下床３上に接着材等によって固定されるとともに、上床４を下方から支える例えば梁状の構造部材５に、ボルト等によって連結されている。 (overall structure)
FIG. 1 is a diagram showing a schematic configuration of a vibration isolator 1 according to an embodiment of the present invention. As shown in FIG. 2, the vibration isolator 1 is used for a dry double floor 2, for example. Specifically, the vibration isolator 1 is disposed between the lower floor 3 and the upper floor 4 of the dry double floor 2 and elastically supports the upper floor 4 with respect to the lower floor 3. The vibration isolator 1 is fixed to the concrete lower floor 3 with an adhesive or the like, and is connected to a beam-like structural member 5 that supports the upper floor 4 from below by bolts or the like.

本実施形態では、防振装置１を乾式二重床に適用しているが、この限りではなく、防振装置１を、他の構造体を支持するために用いてもよい。 In the present embodiment, the vibration isolator 1 is applied to a dry double floor. However, the present invention is not limited to this, and the vibration isolator 1 may be used to support other structures.

図１に示すように、防振装置１は、全体として概略円柱状に形成されている。詳しくは、防振装置１は、略円柱状の積層体１０と、積層体１０の積層方向の両端に位置する上部支持体２０及び下部支持体２５とを有する。すなわち、上部支持体２０及び下部支持体２５は、それぞれ、積層体１０の積層方向の端面を覆うように配置されている。 As shown in FIG. 1, the vibration isolator 1 is formed in a substantially cylindrical shape as a whole. Specifically, the vibration isolator 1 includes a substantially cylindrical laminated body 10, and an upper support 20 and a lower support 25 that are positioned at both ends of the laminated body 10 in the stacking direction. That is, the upper support body 20 and the lower support body 25 are respectively disposed so as to cover the end faces of the stacked body 10 in the stacking direction.

図１及び図３に示すように、積層体１０は、それぞれリング状に形成されたゴム板１１（弾性部材）と硬質板１２（平板部材）とをそれらの厚み方向に交互に積層することにより構成される。すなわち、硬質板１２は、複数のゴム板１１に対し、ゴム板１１とゴム板１１との間に配置される。ゴム板１１と硬質板１２とは、接着材によって接着されていてもよいし、単に接触している状態であってもよい。 As shown in FIGS. 1 and 3, the laminate 10 is formed by alternately laminating rubber plates 11 (elastic members) and hard plates 12 (flat plate members) formed in a ring shape in the thickness direction. Composed. That is, the hard plate 12 is disposed between the rubber plate 11 and the rubber plate 11 with respect to the plurality of rubber plates 11. The rubber plate 11 and the hard plate 12 may be bonded by an adhesive or may be in a state where they are simply in contact with each other.

ゴム板１１及び硬質板１２は、それぞれ、中央部分に貫通穴１１ａ，１２ａを有する円形状の平板である。これらの貫通穴１１ａ，１２ａは、それぞれ、ゴム板１１及び硬質板１２に、積層体１０の積層方向に対応する位置（積層体１０を積層方向から見て中央部分）に形成されている。これにより、ゴム板１１及び硬質板１２を積層することによって構成された積層体１０は、積層方向に延びる貫通孔１０ａを有する。すなわち、積層体１０の貫通孔１０ａは、ゴム板１１及び硬質板１２を貫通している。 The rubber plate 11 and the hard plate 12 are circular flat plates each having through holes 11a and 12a in the center portion. These through holes 11a and 12a are respectively formed in the rubber plate 11 and the hard plate 12 at positions corresponding to the stacking direction of the stacked body 10 (center portion when the stacked body 10 is viewed from the stacking direction). Thereby, the laminated body 10 comprised by laminating | stacking the rubber plate 11 and the hard board 12 has the through-hole 10a extended in a lamination direction. That is, the through hole 10 a of the laminate 10 passes through the rubber plate 11 and the hard plate 12.

このような貫通孔１０ａを有する積層体１０では、積層方向に力を受けた場合に、受圧面積が小さくなる一方、積層体１０の表面積が増大するため、容易に変形を生じる。よって、上述の構成により、人が床上で跳ねた場合などに生じる低い振動数（例えば１０Ｈｚ以下）の振動を低減可能な防振装置１が得られる。 In the laminated body 10 having such a through hole 10a, when a force is applied in the laminating direction, the pressure receiving area is reduced, while the surface area of the laminated body 10 is increased, and therefore, deformation easily occurs. Therefore, with the above-described configuration, it is possible to obtain the vibration isolator 1 that can reduce the vibration of a low frequency (for example, 10 Hz or less) that occurs when a person jumps on the floor.

ゴム板１１は、例えばゴム硬度が５０度の天然ゴムによって構成されるリング状の平板部材である。図４に示すように、ゴム板１１の厚み方向の一方の面には、複数の溝部１１ｂ（凹部）が形成されているとともに、該ゴム板１１の厚み方向の他方の面には、複数の溝部１１ｃ（凹部）が形成されている。すなわち、ゴム板１１の厚み方向の両面には、それぞれ複数の溝部１１ｂ，１１ｃが形成されている。このように、ゴム板１１の厚み方向の両面に溝部１１ｂ，１１ｃを設けることで、ゴム板１１の表面積を拡大させることができ、ゴム板１１を容易に変形させることができる。 The rubber plate 11 is a ring-shaped flat plate member made of natural rubber having a rubber hardness of 50 degrees, for example. As shown in FIG. 4, a plurality of grooves 11 b (concave portions) are formed on one surface in the thickness direction of the rubber plate 11, and a plurality of grooves 11 b (concave portions) are formed on the other surface in the thickness direction of the rubber plate 11. A groove 11c (concave portion) is formed. That is, a plurality of grooves 11b and 11c are formed on both surfaces in the thickness direction of the rubber plate 11, respectively. Thus, by providing the groove portions 11b and 11c on both surfaces in the thickness direction of the rubber plate 11, the surface area of the rubber plate 11 can be increased, and the rubber plate 11 can be easily deformed.

溝部１１ｂ，１１ｃは、それぞれ、ゴム板１１の厚み方向から見て、直線状に形成されているとともに、隣りの溝部１１ｂ，１１ｃに対して略平行に形成されている。このような溝部１１ｂ，１１ｃをゴム板１１に設けることにより、溝部１１ｂ同士の間及び溝部１１ｃ同士の間には、それぞれ、略平行に延びる直線状の凸部１１ｄ，１１ｅが複数、形成される（図４（ｂ）参照）。 The groove portions 11b and 11c are each formed in a straight line when viewed from the thickness direction of the rubber plate 11, and are formed substantially parallel to the adjacent groove portions 11b and 11c. By providing such groove portions 11b and 11c on the rubber plate 11, a plurality of linear convex portions 11d and 11e extending substantially in parallel are formed between the groove portions 11b and between the groove portions 11c, respectively. (See FIG. 4 (b)).

図４（ａ）に示すように、溝部１１ｂは、ゴム板１１の厚み方向から見て、該ゴム板１１の他方の面に形成された溝部１１ｃに対して直交するように、ゴム板１１に形成されている。すなわち、ゴム板１１の厚み方向から見て、該ゴム板１１の両面にそれぞれ形成される溝部１１ｂ，１１ｃは互いに直行している。これにより、ゴム板１１の片面のみに溝部を設ける構成に比べて、ゴム板１１の厚み方向の剛性のばらつきを低減することができる。なお、本実施形態では、溝部１１ｂと溝部１１ｃとは、ゴム板１１の厚み方向から見て直交しているが、この限りではなく、ゴム板１１の厚み方向から見て溝部１１ｂと溝部１１ｃとが交差していれば、どのような角度で交わっていてもよい。 As shown in FIG. 4A, the groove 11b is formed on the rubber plate 11 so as to be orthogonal to the groove 11c formed on the other surface of the rubber plate 11 when viewed from the thickness direction of the rubber plate 11. Is formed. That is, when viewed from the thickness direction of the rubber plate 11, the groove portions 11 b and 11 c formed on both surfaces of the rubber plate 11 are orthogonal to each other. Thereby, compared with the structure which provides a groove part only in the single side | surface of the rubber plate 11, the dispersion | variation in the rigidity of the thickness direction of the rubber plate 11 can be reduced. In the present embodiment, the groove portion 11b and the groove portion 11c are orthogonal to each other when viewed from the thickness direction of the rubber plate 11, but this is not restrictive, and the groove portion 11b and the groove portion 11c are viewed from the thickness direction of the rubber plate 11. As long as s intersect, they may intersect at any angle.

硬質板１２は、例えばステンレス鋼などの金属製の平板であり、ゴム板１１と同等の内外径を有するリング状に形成されている。硬質板１２は、ゴム板１１に比べて大きい縦弾性係数を有する材料によって構成される。 The hard plate 12 is a flat plate made of metal such as stainless steel, and is formed in a ring shape having an inner and outer diameter equivalent to that of the rubber plate 11. The hard plate 12 is made of a material having a larger longitudinal elastic modulus than the rubber plate 11.

上述の構成を有するゴム板１１同士の間に硬質板１２を挟み込むように、複数のゴム板１１及び硬質板１２を厚み方向に交互に積層することにより、積層体１０を形成する。 The laminated body 10 is formed by alternately laminating the plurality of rubber plates 11 and the hard plates 12 in the thickness direction so that the hard plates 12 are sandwiched between the rubber plates 11 having the above-described configuration.

このとき、図５に示すように、複数のゴム板１１は、積層体１０の積層方向から見て、各ゴム板１１の溝部１１ｂがそれぞれ異なる方向（図５の各矢印方向）に延びるように、配置されている。詳しくは、複数のゴム板１１は、積層方向から見て、硬質板１２を挟んで配置される一対のゴム板１１の一方の面に形成された溝部１１ｂ同士のなす角度（図５の実線矢印と破線矢印とのなす角度）と、別の硬質板１２を挟んで配置される一対のゴム板１１の一方の面に形成された溝部１１ｂ同士のなす角度（図５の破線矢印と一点鎖線矢印とのなす角度）とが、同等になるように、互いに積層される。本実施形態の場合、ゴム板１１は３層、積層されているため、積層体１０の積層方向から見て、硬質板１２を挟んで配置される一対のゴム板１１の溝部１１ｂ同士のなす角度は１２０度である。なお、図１から図３及び図７では、ゴム板１１の表面に形成された溝部１１ｂ，１１ｃの図示を省略している。 At this time, as shown in FIG. 5, the plurality of rubber plates 11 are formed so that the groove portions 11 b of the rubber plates 11 extend in different directions (directions of arrows in FIG. 5) when viewed from the stacking direction of the stacked body 10. Have been placed. Specifically, the plurality of rubber plates 11 are viewed from the stacking direction at an angle formed by the groove portions 11b formed on one surface of the pair of rubber plates 11 arranged with the hard plate 12 interposed therebetween (solid line arrow in FIG. 5). And the angle between the groove portions 11b formed on one surface of a pair of rubber plates 11 arranged with another hard plate 12 interposed therebetween (the broken line arrow and the one-dot chain line arrow in FIG. 5). Are stacked on each other so that they are equal to each other. In the case of the present embodiment, since the rubber plate 11 is laminated in three layers, the angle formed by the groove portions 11b of the pair of rubber plates 11 arranged with the hard plate 12 sandwiched when viewed from the lamination direction of the laminate 10. Is 120 degrees. In FIGS. 1 to 3 and 7, the illustration of the groove portions 11 b and 11 c formed on the surface of the rubber plate 11 is omitted.

上述のように、複数のゴム板１１を配置することで、積層体１０の積層方向の剛性を、該積層体１０の積層方向から見て積層体１０の全周で同等にすることができる。これにより、積層体１０に対し、該積層体１０の積層方向に力が加わっても、積層体１０を全周で均一に積層方向に変形させることができる。したがって、防振装置１によって、該防振装置１に入力される低い振動数の振動を、より確実に低減することができる。 As described above, by arranging the plurality of rubber plates 11, the rigidity in the stacking direction of the stacked body 10 can be made equal over the entire circumference of the stacked body 10 when viewed from the stacking direction of the stacked body 10. Thereby, even if force is applied to the stacked body 10 in the stacking direction of the stacked body 10, the stacked body 10 can be uniformly deformed in the stacking direction on the entire circumference. Accordingly, the vibration isolator 1 can more reliably reduce the low frequency vibration input to the vibration isolator 1.

図３に示すように、上部支持体２０及び下部支持体２５は、略円筒状の積層体１０の端部に配置される。上部支持体２０と下部支持体２５とをボルト３０によって接続することにより、積層体１０は、上部支持体２０と下部支持体２５との間に挟み込まれる。 As shown in FIG. 3, the upper support 20 and the lower support 25 are disposed at the end of the substantially cylindrical laminate 10. The laminated body 10 is sandwiched between the upper support 20 and the lower support 25 by connecting the upper support 20 and the lower support 25 with the bolts 30.

上部支持体２０は、例えばステンレスなどの金属材料によって構成されている。上部支持体２０は、円盤状の天板２１（支持板）と、該天板２１の一面側に設けられた上側支持部２２（支持部）とを備える。上部支持体２０は、天板２１が積層体１０の上面に接触する一方、上側支持部２２が該積層体１０の内方に位置付けられるように、積層体１０に対して配置されている。 The upper support 20 is made of a metal material such as stainless steel. The upper support 20 includes a disk-shaped top plate 21 (support plate) and an upper support portion 22 (support portion) provided on one surface side of the top plate 21. The upper support 20 is disposed with respect to the stacked body 10 so that the top plate 21 contacts the upper surface of the stacked body 10 and the upper support portion 22 is positioned inward of the stacked body 10.

天板２１は、積層体１０の外径よりも大きな外径を有する円盤状の部材である。天板２１の中央部分には、防振装置１を組み立てる際にボルト３０が通過する貫通穴２１ａが形成されている。また、図１に示すように、天板２１には、平面視で貫通穴２１ａを挟んだ位置に２つの貫通穴２１ｂが形成されている。特に図示しないが、天板２１は、貫通穴２１ｂに挿入されるボルト等によって、上床２を支える構造部材５等に固定される。 The top plate 21 is a disk-shaped member having an outer diameter larger than the outer diameter of the laminated body 10. A through hole 21a through which the bolt 30 passes when the vibration isolator 1 is assembled is formed in the central portion of the top plate 21. Further, as shown in FIG. 1, the top plate 21 has two through holes 21b at positions sandwiching the through holes 21a in plan view. Although not particularly illustrated, the top plate 21 is fixed to the structural member 5 or the like that supports the upper floor 2 by bolts or the like inserted into the through holes 21b.

上側支持部２２は、図３及び図７に示すように、矩形状の底部２２ａと、該底部２２ａを天板２１に対して支持する一対の矩形状の側壁２２ｂとを有する。一対の側壁２２ｂは、底部２２ａの対向する辺から該底部２２ａと直交する方向にそれぞれ延びている。また、各側壁２２ｂは、底部２２ａとは反対側が天板２１の下面に溶接等によって接続されている。これにより、上側支持部２２は、積層体１０の側面から見て、底部２２ａが下側に位置する略Ｕ字状に形成されている。上側支持部２２は、積層体１０の内方に配置可能なように、底部２２ａの外形が積層体１０の貫通孔１０ａよりも小さい。 As shown in FIGS. 3 and 7, the upper support portion 22 includes a rectangular bottom portion 22 a and a pair of rectangular side walls 22 b that support the bottom portion 22 a with respect to the top plate 21. The pair of side walls 22b extend in the direction orthogonal to the bottom 22a from the opposite sides of the bottom 22a. Each side wall 22b is connected to the lower surface of the top plate 21 by welding or the like on the side opposite to the bottom 22a. Thus, the upper support portion 22 is formed in a substantially U shape with the bottom portion 22a positioned on the lower side when viewed from the side surface of the stacked body 10. The upper support portion 22 has an outer shape of the bottom portion 22 a that is smaller than the through hole 10 a of the stacked body 10 so that the upper support portion 22 can be disposed inside the stacked body 10.

上側支持部２２の底部２２ａには、その中央部分に、貫通穴２２ｃが形成されている。この貫通穴２２ｃ内には、ボルト３０が挿入されたゴムブッシュ３１の一部が配置される。 A through hole 22c is formed in the center portion of the bottom portion 22a of the upper support portion 22. A part of the rubber bush 31 into which the bolt 30 is inserted is disposed in the through hole 22c.

ゴムブッシュ３１（振動抑制部材）は、円柱状の大径部３１ａと、該大径部３１ａよりも外径が小さい円柱状の小径部３１ｂとを有し、大径部３１ａの一方の端面上に小径部３１ｂが一体で形成されている。ゴムブッシュ３１の小径部３１ｂは、上側支持部２２の底部２２ａに設けられた貫通穴２２ｃに挿入される。また、ゴムブッシュ３１には、大径部３１ａ及び小径部３１ｂのそれぞれ中央部分を貫通するように、貫通孔３１ｃが形成されている。この貫通孔３１ｃ内に、ボルト３０の軸部が挿入される。なお、ゴムブッシュ３１も、上述のゴム板１１と同様、例えばゴム硬度が５０度の天然ゴムによって構成される。 The rubber bush 31 (vibration suppressing member) has a cylindrical large-diameter portion 31a and a cylindrical small-diameter portion 31b having an outer diameter smaller than that of the large-diameter portion 31a, and is on one end surface of the large-diameter portion 31a. The small diameter portion 31b is integrally formed. The small diameter portion 31 b of the rubber bush 31 is inserted into a through hole 22 c provided in the bottom portion 22 a of the upper support portion 22. Further, the rubber bush 31 is formed with a through-hole 31c so as to penetrate the central portions of the large-diameter portion 31a and the small-diameter portion 31b. The shaft portion of the bolt 30 is inserted into the through hole 31c. The rubber bush 31 is also made of natural rubber having a rubber hardness of 50 degrees, for example, as with the rubber plate 11 described above.

これにより、上側支持部２２の底部２２ａに、ボルト３０が直接、接触するのを防止できる。したがって、上床３から構造部材５を介して上側支持部２２に伝わった振動が、ボルト３０を介して下側支持部２５に伝わるのを、ゴムブッシュ３１によって防止できる。すなわち、ゴムブッシュ３１は、ボルト３０を介して上側支持部２２から下部支持体２５に振動が伝わるのを防止する振動抑制部材として機能する。 Thereby, it can prevent that the volt | bolt 30 contacts the bottom part 22a of the upper side support part 22 directly. Therefore, the rubber bush 31 can prevent the vibration transmitted from the upper floor 3 to the upper support portion 22 via the structural member 5 from being transmitted to the lower support portion 25 via the bolt 30. That is, the rubber bush 31 functions as a vibration suppressing member that prevents vibration from being transmitted from the upper support portion 22 to the lower support body 25 via the bolt 30.

ゴムブッシュ３１は、防振装置１に荷重が作用していない状態では、後述するナット２８に締結されたボルト３０の頭部が接触する一方、防振装置１に所定の荷重が作用している状態で、ボルト３０の頭部が離間するような厚みを有する。これにより、防振装置１によって上床４等を支持していて該防振装置１に所定の荷重が作用している状態では、ボルト３０を介して上側支持部２２から下側支持部２５に振動が伝わるのをより確実に防止できる。なお、図３が、防振装置１に所定の荷重が作用した状態を示す。 In a state where no load is applied to the vibration isolator 1, the rubber bush 31 is in contact with the head of a bolt 30 fastened to a nut 28 described later, while a predetermined load is applied to the vibration isolator 1. In this state, the bolt 30 has such a thickness that the head of the bolt 30 is separated. Thus, in a state where the upper floor 4 and the like are supported by the vibration isolator 1 and a predetermined load is applied to the vibration isolator 1, vibration is generated from the upper support portion 22 to the lower support portion 25 via the bolt 30. Can be prevented more reliably. FIG. 3 shows a state in which a predetermined load is applied to the vibration isolator 1.

下部支持体２５は、上部支持体２０と同様、例えばステンレスなどの金属材料によって構成されている。図７に示すように、下部支持体２５は、円盤状の底板２６（支持板）と、該底板２６上に設けられた一対の下側支持部２７（支持部）とを備える。下部支持体２５は、底板２６が積層体１０の下面に接触する一方、下側支持部２７が該積層体１０の内方に位置付けられるように、積層体１０に対して配置されている。 The lower support 25 is made of a metal material such as stainless steel, for example, like the upper support 20. As shown in FIG. 7, the lower support 25 includes a disk-shaped bottom plate 26 (support plate) and a pair of lower support portions 27 (support portions) provided on the bottom plate 26. The lower support body 25 is disposed with respect to the stacked body 10 so that the bottom plate 26 contacts the lower surface of the stacked body 10 and the lower support portion 27 is positioned inward of the stacked body 10.

底板２６には、図３及び図７に示すように、上面の中央部分に、ボルト３０のネジ部が締結されるナット２８が設けられている。ナット２８は、ボルト３０のネジ部が締結可能なように、開口部分が上側を向いた状態で底板２６に取り付けられている。なお、ナット２８とボルト３０との締結が緩まないように、ナット２８とボルト３０との間に接着剤を入れてもよいし、ナット２８をダブルナットにしてもよい。 As shown in FIGS. 3 and 7, the bottom plate 26 is provided with a nut 28 to which a screw portion of the bolt 30 is fastened at a central portion of the upper surface. The nut 28 is attached to the bottom plate 26 with the opening portion facing upward so that the screw portion of the bolt 30 can be fastened. In addition, an adhesive may be put between the nut 28 and the bolt 30 so that the fastening between the nut 28 and the bolt 30 is not loosened, or the nut 28 may be a double nut.

図７に示すように、一対の下側支持部２７は、底板２６の上面に、ナット２８を挟むように配置されている。各下側支持部２７は、角柱状の底部２７ａと、該底部２７ａの長手方向両端から該底部２７ａに直交するようにそれぞれ延びる一対の角柱状の突出部２７ｂとを有する。これにより、下側支持部２７は、全体として略Ｕ字状に形成されている。 As shown in FIG. 7, the pair of lower support portions 27 are disposed on the upper surface of the bottom plate 26 so as to sandwich the nut 28. Each lower support portion 27 includes a prismatic bottom portion 27a and a pair of prismatic protrusion portions 27b extending from both ends in the longitudinal direction of the bottom portion 27a so as to be orthogonal to the bottom portion 27a. Thereby, the lower side support part 27 is formed in the substantially U shape as a whole.

各下側支持部２７は、底部２７ａが底板２６の上面に溶接等によって接続されている。よって、各下側支持部２７の突出部２７ｂは、底板２６から上方に向かって突出している。下側支持部２７の突出部２７ｂの長さは、防振装置１に積層体１０の積層方向に力が加わって該積層体１０が圧縮された場合でも、天板２１と接触しないような長さである。なお、一対の下側支持部２７は、積層体１０の内方に配置可能なように、所定の間隔で底板２６上に配置されている。 Each lower support portion 27 has a bottom portion 27a connected to the upper surface of the bottom plate 26 by welding or the like. Therefore, the protruding portion 27 b of each lower support portion 27 protrudes upward from the bottom plate 26. The length of the protruding portion 27b of the lower support portion 27 is such that it does not come into contact with the top plate 21 even when a force is applied to the vibration isolator 1 in the stacking direction of the stacked body 10 and the stacked body 10 is compressed. That's it. The pair of lower support portions 27 are disposed on the bottom plate 26 at a predetermined interval so as to be disposed inside the stacked body 10.

上述のように構成された上部支持体２０及び下部支持体２５は、図３に示すように、積層体１０の積層方向両端に配置された状態で、上側支持部２２及び下側支持部２７が積層体１０の内方に位置付けられる。しかも、上側支持部２２及び下側支持部２７は、積層体１０の内方で該積層体１０の積層方向に重なるように設けられている。すなわち、図３の状態で、上側支持部２２の側壁２２ｂと、下側支持部２７の突出部２７ｂとが、積層体１０の積層方向に重なっている。 As shown in FIG. 3, the upper support 20 and the lower support 25 configured as described above are arranged at both ends in the stacking direction of the stacked body 10, and the upper support 22 and the lower support 27 are It is positioned inside the laminate 10. Moreover, the upper support portion 22 and the lower support portion 27 are provided so as to overlap in the stacking direction of the stacked body 10 inside the stacked body 10. That is, in the state of FIG. 3, the side wall 22 b of the upper support portion 22 and the protruding portion 27 b of the lower support portion 27 overlap in the stacking direction of the stacked body 10.

図６に示すように、上側支持部２２及び下側支持部２７は、上側支持部２２の角部分（底部２２ａ及び側壁２２ｂの角部同士を合わせた部分）が下側支持部２７の突出部２７ｂと干渉しないように、積層体１０内に配置されている。詳しくは、下側支持部２７の突出部２７ｂを互いに離間して設けることにより、下側支持部２７には、上側支持部２２との干渉を防止するための凹部２９が形成される。そして、上部支持体２０及び下部支持体２５は、凹部２９（下側支持部２７の突出部２７ｂ同士の間）に上側支持部２２の角部分が位置付けられるように、積層体１０に対して組み合わされる。本実施形態の場合、上側支持部２２及び下側支持部２７は、積層体１０の積層方向から見て、上側支持部２２の側壁２２ｂと下側支持部２７の底部２７ａとのなす角度が略４５度になるように、配置されている（図６参照）。 As shown in FIG. 6, the upper support portion 22 and the lower support portion 27 are such that the corner portion of the upper support portion 22 (the portion where the corner portions of the bottom portion 22 a and the side wall 22 b are combined) is the protruding portion of the lower support portion 27. It arrange | positions in the laminated body 10 so that it may not interfere with 27b. Specifically, by providing the protruding portions 27b of the lower support portion 27 apart from each other, the lower support portion 27 is formed with a recess 29 for preventing interference with the upper support portion 22. Then, the upper support 20 and the lower support 25 are combined with the stacked body 10 so that the corners of the upper support 22 are positioned in the recesses 29 (between the protrusions 27b of the lower support 27). It is. In the case of the present embodiment, the upper support 22 and the lower support 27 have substantially the same angle between the side wall 22b of the upper support 22 and the bottom 27a of the lower support 27 when viewed from the stacking direction of the stacked body 10. It arrange | positions so that it may become 45 degree | times (refer FIG. 6).

これにより、上述のように、積層体１０の内部で、上側支持部２２の側壁２２ｂと下側支持部２７の突出部２７ｂとを、積層体１０の積層方向に重なるように配置することができる。したがって、積層体１０に対して上部支持体２０及び下部支持体２５を積層方向によりコンパクトに配置することができ、コンパクトな防振装置１が得られる。 Accordingly, as described above, the side wall 22b of the upper support portion 22 and the protruding portion 27b of the lower support portion 27 can be arranged in the stacked body 10 so as to overlap in the stacking direction of the stacked body 10. . Therefore, the upper support 20 and the lower support 25 can be arranged more compactly in the stacking direction with respect to the stacked body 10, and the compact vibration isolator 1 can be obtained.

（実施形態の効果）
複数のリング状のゴム板１１と複数のリング状の硬質板１２とをそれらの厚み方向に交互に積層することにより積層体１０を形成する。これにより、積層体１０の受圧面積を小さくしつつ、ゴム板１１が変形可能な表面積を増大させることができる。したがって、積層体１０は、積層方向に容易に変形可能である。 (Effect of embodiment)
The laminated body 10 is formed by alternately laminating a plurality of ring-shaped rubber plates 11 and a plurality of ring-shaped hard plates 12 in the thickness direction thereof. Thereby, the surface area which can deform | transform the rubber plate 11 can be increased, making the pressure receiving area of the laminated body 10 small. Therefore, the stacked body 10 can be easily deformed in the stacking direction.

また、ゴム板１１の厚み方向の両面に溝部１１ｂ，１１ｃを設けることにより、ゴム板１１を厚み方向により容易に変形させることができる。したがって、積層体１０は、積層方向により容易に変形するため、防振装置１によって、低い振動数の振動をより効果的に低減することができる。 Moreover, by providing the groove portions 11b and 11c on both surfaces in the thickness direction of the rubber plate 11, the rubber plate 11 can be easily deformed in the thickness direction. Therefore, since the laminated body 10 is easily deformed in the lamination direction, the vibration isolator 1 can more effectively reduce the vibration having a low frequency.

しかも、複数のゴム板１１は、積層体１０の積層方向から見て、硬質板１２を挟んで配置される一対のゴム板１１の溝部１１ｂ同士のなす角度と、別の硬質板１２を挟んで配置される一対のゴム板１１の溝部１１ｂ同士のなす角度とが同等になるように配置される。これにより、防振装置１に対し、積層体１０の積層方向に振動が入力された場合に、積層体１０を全周で均一に積層方向に変形させることができるため、低い振動数の振動をより確実に低減することができる。 Moreover, the plurality of rubber plates 11, as viewed from the stacking direction of the laminated body 10, have an angle formed by the groove portions 11 b of the pair of rubber plates 11 disposed with the hard plate 12 interposed therebetween, and another hard plate 12 interposed therebetween. It arrange | positions so that the angle which groove part 11b of a pair of rubber plate 11 arrange | positions may make equal. Accordingly, when vibration is input to the vibration isolator 1 in the stacking direction of the stacked body 10, the stacked body 10 can be uniformly deformed in the stacking direction on the entire circumference, and therefore vibration with a low frequency can be generated. It can reduce more reliably.

さらに、積層体１０の積層方向の両端に位置する上部支持体２０と下部支持体２５とは、ボルト３０によって接続されている。これにより、積層体１０のゴム板１１及び硬質板１２が積層方向に分離するのを防止できる。すなわち、防振装置１に強い衝撃が加わると、その反動で積層体１０のゴム板１１が硬質板１２から離間するが、そのようなゴム板１１の挙動を、ボルト３０によって抑えることができる。 Furthermore, the upper support 20 and the lower support 25 positioned at both ends in the stacking direction of the stacked body 10 are connected by bolts 30. Thereby, it can prevent that the rubber plate 11 and the hard board 12 of the laminated body 10 isolate | separate in a lamination direction. That is, when a strong impact is applied to the vibration isolator 1, the rubber plate 11 of the laminate 10 is separated from the hard plate 12 by the reaction, and the behavior of the rubber plate 11 can be suppressed by the bolt 30.

また、上部支持体２０及び下部支持体２５は、それぞれ、積層体１０の内方に位置する上側支持部２２及び下側支持部２７を有するため、該上側支持部２２及び下側支持部２７によって、積層体１０の横ズレを防止することができる。しかも、上側支持部２２と下部支持体２５の底板２６とをボルト３０によって接続することにより、ボルト３０の長さを短くすることができ、該ボルト３０に作用する曲げ応力やせん断力等を低減することができる。 Further, since the upper support 20 and the lower support 25 have the upper support 22 and the lower support 27 that are located inward of the laminated body 10, respectively, the upper support 22 and the lower support 27 support the upper support 20 and the lower support 25. The lateral displacement of the laminate 10 can be prevented. In addition, the length of the bolt 30 can be shortened by connecting the upper support portion 22 and the bottom plate 26 of the lower support body 25 with the bolt 30, and bending stress, shearing force, etc. acting on the bolt 30 are reduced. can do.

しかも、上側支持部２２とボルト３０との間にはゴムブッシュ３１が配置されているため、上部支持体２０に加わった振動がボルト３０を介して下部支持体２５に伝わるのを防止できる。 In addition, since the rubber bush 31 is disposed between the upper support portion 22 and the bolt 30, vibration applied to the upper support 20 can be prevented from being transmitted to the lower support 25 via the bolt 30.

上部支持体２０及び下部支持体２５は、上側支持部２２の角部分が、下側支持部２７の突出部２７ｂ同士の間に位置するように、積層体１０に対して取り付けられる。これにより、上側支持部２２と下側支持部２７とが干渉するのを防止できる。したがって、上側支持部２２と下側支持部２７とを積層体１０の積層方向に重なるように配置できるため、防振装置１において積層体１０の積層方向のコンパクト化を図れる。 The upper support 20 and the lower support 25 are attached to the stacked body 10 such that the corners of the upper support 22 are located between the protrusions 27b of the lower support 27. Thereby, it can prevent that the upper side support part 22 and the lower side support part 27 interfere. Therefore, since the upper side support part 22 and the lower side support part 27 can be arrange | positioned so that it may overlap with the lamination direction of the laminated body 10, compactization of the lamination direction of the laminated body 10 can be achieved in the vibration isolator 1. FIG.

また、上側支持部２２が積層体１０の上側部分の横ずれを防止するとともに、下側支持部２７が積層体１０の下側部分の横ずれを防止する。すなわち、積層体１０に横ずれが発生した場合、上側支持部２２は積層体１０の複数の硬質板１２のうち上側に位置する硬質板１２に接触し、下側支持部２７は積層体１０の下側に位置する硬質板１２に接触する。これにより、積層体１０の硬質板１２が上側支持部２２及び下側支持部２７の両方に接触するのを防止できる。したがって、上側支持部２２と下側支持部２７との間で振動が伝わるのをより確実に防止できる。 Further, the upper support portion 22 prevents the lateral shift of the upper portion of the stacked body 10, and the lower support portion 27 prevents the lateral shift of the lower portion of the stacked body 10. That is, when a lateral shift occurs in the laminate 10, the upper support 22 contacts the upper hard plate 12 among the plurality of hard plates 12 of the laminate 10, and the lower support 27 is below the laminate 10. It contacts the hard plate 12 located on the side. Thereby, it can prevent that the hard board 12 of the laminated body 10 contacts both the upper side support part 22 and the lower side support part 27. FIG. Therefore, it is possible to more reliably prevent vibration from being transmitted between the upper support portion 22 and the lower support portion 27.

（その他の実施形態）
以上、本発明の実施の形態を説明したが、上述した実施の形態は本発明を実施するための例示に過ぎない。よって、上述した実施の形態に限定されることなく、その趣旨を逸脱しない範囲内で上述した実施の形態を適宜変形して実施することが可能である。 (Other embodiments)
Although the embodiments of the present invention have been described above, the above-described embodiments are merely examples for carrying out the present invention. Therefore, the present invention is not limited to the above-described embodiment, and the above-described embodiment can be appropriately modified and implemented without departing from the spirit of the invention.

前記実施形態では、積層体１０を、３層のゴム板１１と２層の硬質板１２とを有する構成としている。しかしながら、積層体１０に用いるゴム板１１は２層であってもよいし、４層以上であってもよい。また、硬質板１２は１層または３層以上であってもよい。 In the said embodiment, the laminated body 10 is set as the structure which has the three-layer rubber board 11 and the two-layer hard board 12. FIG. However, the rubber plate 11 used for the laminate 10 may be two layers or four or more layers. Further, the hard plate 12 may be one layer or three or more layers.

前記実施形態では、各ゴム板１１の厚み方向の両面に溝部１１ｂ，１１ｃを設けている。しかしながら、各ゴム板１１の厚み方向の片面のみに溝部を設けてもよい。また、各ゴム板１１の厚み方向の面の一部に溝部を設けてもよいし、各ゴム板１１の側面の少なくとも一部に溝部を設けてもよい。さらに、複数のゴム板１１のうち一部のゴム板１１のみに溝部を設けてもよい。 In the said embodiment, the groove parts 11b and 11c are provided in both surfaces of the thickness direction of each rubber plate 11. As shown in FIG. However, the groove portions may be provided only on one surface of each rubber plate 11 in the thickness direction. Moreover, a groove part may be provided in a part of surface of each rubber plate 11 in the thickness direction, and a groove part may be provided in at least a part of the side surface of each rubber plate 11. Furthermore, a groove part may be provided only in a part of the plurality of rubber plates 11.

前記実施形態では、ゴム板１１の厚み方向の面に互いに平行な直線状の溝部１１ｂ、１１ｃを設けているが、どのような形状の溝部であってもよいし、溝部以外の凹部であってもよい。例えば、ゴム板１１の中央部分から径方向に放射線状に延びるように溝部を設けたり、ディンプルなどのような凹凸を設けたりしてもよい。また、ゴム板１１に設ける溝部または凹部は、一つであってもよい。 In the above-described embodiment, the linear groove portions 11b and 11c that are parallel to each other are provided on the surface in the thickness direction of the rubber plate 11. However, the groove portions may be any shape, and may be a recess other than the groove portion. Also good. For example, a groove portion may be provided so as to extend radially from the central portion of the rubber plate 11, or irregularities such as dimples may be provided. Moreover, the groove part or recessed part provided in the rubber plate 11 may be one.

前記実施形態では、ボルト３０によって上部支持体２０と下部支持体２５とを接続している。しかしながら、上部支持体２０と下部支持体２５とを接続せずに、ゴム板１１と、硬質板１２、上部支持体２０及び下部支持体２５とをそれぞれ接着材等によって接着してもよい。また、ボルト以外の接続部材によって上部支持体２０と下部支持体２５とを接続してもよい。さらに、ボルト３０などの接続部材を設けなくてもよいし、ゴム板１１と、硬質板１２、上部支持体２０及び下部支持体２５とを接着しなくてもよい。この場合にゴム板１１及び硬質板１２が積層方向に分離するのを防止するためには、例えば防振装置を挟み込む部材同士を連結すればよい。 In the embodiment, the upper support 20 and the lower support 25 are connected by the bolt 30. However, without connecting the upper support 20 and the lower support 25, the rubber plate 11, the hard plate 12, the upper support 20, and the lower support 25 may be bonded to each other with an adhesive or the like. Moreover, you may connect the upper support body 20 and the lower support body 25 by connection members other than a volt | bolt. Furthermore, the connection member such as the bolt 30 may not be provided, and the rubber plate 11, the hard plate 12, the upper support 20, and the lower support 25 may not be bonded. In this case, in order to prevent the rubber plate 11 and the hard plate 12 from separating in the stacking direction, for example, members that sandwich the vibration isolator may be connected.

前記実施形態では、ゴム板１１及びゴムブッシュ３１に、ゴム硬度が５０度の天然ゴムを用いているが、この限りではなく、他の弾性材料を用いたり、ゴム硬度が異なるゴム材料を用いたりしてもよい。 In the embodiment, natural rubber having a rubber hardness of 50 degrees is used for the rubber plate 11 and the rubber bush 31. However, the present invention is not limited to this, and other elastic materials or rubber materials having different rubber hardness may be used. May be.

前記実施形態では、硬質板１２をステンレス鋼板としているが、この限りではなく、積層体１０に用いられるゴム板１１等の弾性部材よりも縦弾性係数が大きい材料であれば、硬質板１２にどのような材料を用いてもよい。 In the above-described embodiment, the hard plate 12 is a stainless steel plate. However, the present invention is not limited to this, and any material can be used for the hard plate 12 as long as the material has a higher longitudinal elastic modulus than the elastic member such as the rubber plate 11 used in the laminate 10. Such a material may be used.

前記実施形態では、下側支持部２７を、角柱状の部材によって、全体として略Ｕ字状に形成している。しかしながら、下側支持部は、積層体１０の下側を支持可能な構成であれば、どのような構成であってもよい。また、前記実施形態では、上側支持部２２も全体として略Ｕ字状に形成している。しかしながら、上側支持部は、積層体１０の上側を支持可能な構成であれば、どのような構成であってもよい。防振装置には、上側支持部２２及び下側支持部２７のうち一方のみを設けてもよいし、積層体１０全体を支持可能な支持部を設けてもよい。また、防振装置に支持部を設けなくてもよい。 In the said embodiment, the lower side support part 27 is formed in the substantially U shape as a whole with the prism-shaped member. However, the lower support portion may have any configuration as long as it can support the lower side of the laminate 10. Moreover, in the said embodiment, the upper side support part 22 is also formed in the substantially U shape as a whole. However, the upper support portion may have any configuration as long as it can support the upper side of the laminate 10. In the vibration isolator, only one of the upper support portion 22 and the lower support portion 27 may be provided, or a support portion capable of supporting the entire laminated body 10 may be provided. Moreover, it is not necessary to provide a support part in the vibration isolator.

本発明は、平板状の弾性部材と平板部材とが交互に積層された積層体を有する防振装置に利用可能である。 INDUSTRIAL APPLICABILITY The present invention can be used for a vibration isolator having a laminated body in which flat elastic members and flat plate members are alternately laminated.

１防振装置
２乾式二重床
１０積層体
１０ａ貫通孔
１１ゴム板（弾性部材）
１１ａ貫通穴
１１ｂ、１１ｃ溝部
１２硬質板（平板部材）
１２ａ貫通穴
２０上部支持体
２１天板（支持板）
２２上側支持部（支持部）
２５下部支持体
２６底板（支持板）
２７下側支持部（支持部）
２９凹部
３０ボルト（接続部材）
３１ゴムブッシュ（振動抑制部材） DESCRIPTION OF SYMBOLS 1 Vibration isolator 2 Dry type double floor 10 Laminated body 10a Through-hole 11 Rubber board (elastic member)
11a Through hole 11b, 11c Groove part 12 Hard plate (flat plate member)
12a Through-hole 20 Upper support 21 Top plate (support plate)
22 Upper support (support)
25 Lower support body 26 Bottom plate (support plate)
27 Lower support part (support part)
29 Recess 30 Bolt (connecting member)
31 Rubber bushing (vibration suppression member)

Claims

It has a columnar laminate,
The laminate is
A plurality of elastic members formed in a flat plate shape;
A flat plate member having a larger longitudinal elastic modulus than the plurality of elastic members,
The flat plate member is disposed so as to be sandwiched between the elastic member and the elastic member with respect to the plurality of elastic members,
Wherein all of the plurality of elastic members, have a recess on both sides in the thickness direction,
The anti-vibration device, wherein the recess is formed in the elastic member such that rigidity in the stacking direction of the stacked body is equal over the entire circumference of the stacked body as viewed from the stacking direction of the stacked body .

The vibration isolator according to claim 1 ,
The said recessed part is a vibration isolator containing a groove part.

The vibration isolator according to claim 2 ,
The said recessed part is a vibration isolator containing the several linear groove part formed in parallel with each other.

The vibration isolator according to claim 2 or 3 ,
The laminate has a plurality of flat plate members,
Each of the plurality of elastic members has the groove.
The plurality of elastic members, when viewed from the stacking direction of the laminate, an angle formed by grooves formed in a pair of elastic members disposed between one flat plate member among the plurality of flat plate members, The vibration isolator which is arrange | positioned so that the angle which the groove parts each formed in a pair of elastic member arrange | positioned on both sides of another flat plate member among the several flat plate members may become equivalent.

In the vibration isolator as described in any one of Claim 2 or 3 ,
The groove is formed on both surfaces in the thickness direction of the at least one elastic member,
The groove formed on one surface in the thickness direction of the elastic member intersects the groove formed on the other surface in the thickness direction of the elastic member when viewed from the stacking direction of the laminate. Anti-vibration device.

In the vibration isolator as described in any one of Claim 1 to 5 ,
The said laminated body is a vibration isolator which has a through-hole which penetrates these elastic members and the said flat plate member.

The vibration isolator according to claim 6 ,
A pair of support plates located at both ends in the stacking direction of the stack;
A connection member for connecting the support plates to each other in the through hole of the laminate;
An anti-vibration device further comprising: a vibration suppressing member that is disposed between the connection member and at least one of the pair of support plates and suppresses transmission of vibration between the pair of support plates.

The vibration isolator according to claim 7 ,
At least one of the pair of support plates has a support portion extending inward of the through hole of the laminate,
The said connection member is a vibration isolator which connects the said support part and the other support plate.

The vibration isolator according to claim 7 ,
Each of the pair of support plates has a support portion extending inward of the through hole of the laminate,
The vibration isolator, wherein the support portion provided on one of the pair of support plates has a recess for preventing interference with the support portion provided on the other support plate.

In the vibration isolator as described in any one of Claim 1 to 9 ,
An anti-vibration device placed between the upper and lower floors of the dry double floor.