JPH0249832A - Vibration preventive, anti-seismic construction material - Google Patents
Vibration preventive, anti-seismic construction materialInfo
- Publication number
- JPH0249832A JPH0249832A JP20209488A JP20209488A JPH0249832A JP H0249832 A JPH0249832 A JP H0249832A JP 20209488 A JP20209488 A JP 20209488A JP 20209488 A JP20209488 A JP 20209488A JP H0249832 A JPH0249832 A JP H0249832A
- Authority
- JP
- Japan
- Prior art keywords
- elastic member
- magnetized
- reinforcing
- vibration
- seismic isolation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
Landscapes
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
Description
【発明の詳細な説明】
[産業上の利用分野]
この発明は、地震等発生の際に地面の震動を吸収して建
造物に加わる震動をできるだけ少なくする、建造物用防
振、免震材に関するものである。[Detailed Description of the Invention] [Industrial Application Field] This invention provides vibration isolation and seismic isolation materials for buildings that absorb ground vibrations and minimize the vibrations applied to buildings when an earthquake occurs. It is related to.
−aに、建造物用の免震装置は、地盤と建造物の間に設
置され、建造物を支持すると共に地震波吸収作用をする
防振、免震材と、建造物の震動減衰作用をする緩衝材と
から構成されている。-A, a seismic isolation device for a building is installed between the ground and the building, and includes vibration isolation and seismic isolation materials that support the building and absorb seismic waves, and a seismic isolation device that dampens the vibration of the building. It is made up of a cushioning material.
従来のこの免震装置に用いられている防振、免震材は、
ブロック状または柱状にしたゴム体や、内部に補強板を
埋設したゴム体や、さらに、着磁された補強板を埋設し
たゴム体等から成っている〔発明が解決しようとする課
題〕
しかし、上記従来のブロック状や柱状にしたゴム体の防
振、免震材は、剛性を比較的高くしであるので、軽度の
震動に対しては震動を吸収する効果があるが、強度の震
動に対して余り効果的ではなかった。The vibration isolation and seismic isolation materials used in this conventional seismic isolation device are:
It consists of a block-shaped or columnar rubber body, a rubber body with a reinforcing plate embedded inside it, a rubber body with a magnetized reinforcing plate embedded therein, etc. [Problem to be solved by the invention] However, The conventional block- or column-shaped rubber body vibration and seismic isolation materials have relatively high rigidity, so they are effective in absorbing mild vibrations, but they are effective against strong vibrations. It wasn't very effective.
また、ゴム体の内部に鋼板が埋設された防振、免震材は
、垂直方向の震動を吸収する効果はあるが、水平方向の
震動を吸収する面で必ずしも満足できるものではなかっ
た。In addition, anti-vibration and seismic isolation materials in which steel plates are embedded inside a rubber body have the effect of absorbing vibrations in the vertical direction, but are not necessarily satisfactory in terms of absorbing vibrations in the horizontal direction.
さらに、ゴム体内部に埋設された補強板が着磁されてい
る防振、免震材も、水平方向の震動を吸収する面で必ず
しも満足できるものではなかった。さらに、これらを積
層する際、金属等よりなる補強板とゴム体とは密着しに
(かったので、強固に接着することができず、使用中に
剥離が生じる等の問題があった。Furthermore, vibration-proofing and seismic-isolating materials in which a reinforcing plate embedded inside a rubber body is magnetized are not always satisfactory in terms of absorbing horizontal vibrations. Furthermore, when laminating these, the reinforcing plate made of metal or the like and the rubber body were in close contact with each other, so that they could not be firmly bonded, causing problems such as peeling during use.
そこで、この発明の目的は、弾性部材内部に金属または
高分子化合物等より成る部材を配合すると共に、着磁し
て弾性部材を永久磁化することにより磁力の復元力によ
って、垂直方向の軽度の震動を吸収するのみではなく強
度の震動にも対応できる、建造物用防振、免震材を提供
することである。Therefore, an object of the present invention is to mix a member made of metal or a polymer compound inside an elastic member, and to magnetize the elastic member to make it permanent magnet, so that the restoring force of the magnetic force can cause slight vibrations in the vertical direction. The purpose of the present invention is to provide vibration isolation and seismic isolation materials for buildings that can not only absorb vibrations but also cope with strong vibrations.
この発明の他の目的は、垂直方向の震動を吸収すると共
に、磁力の復元力によって水平方向の震動をも吸収する
建造物用防振、免震材を提供することを目的とする。Another object of the present invention is to provide a vibration isolation material for buildings that absorbs vibrations in the vertical direction and also absorbs vibrations in the horizontal direction using the restoring force of magnetic force.
この発明のさらに他の目的は、弾性部材と補強部材とが
着磁されることによって、接着された弾性部材と補強部
材とが、より一層密着して強固な建造物用防振、免震材
を提供することを目的とする。Still another object of the present invention is to magnetize the elastic member and the reinforcing member, so that the bonded elastic member and the reinforcing member are brought into closer contact with each other, thereby creating a strong vibration-proofing and seismic isolation material for buildings. The purpose is to provide
上記目的を達成するため、この発明では、弾性部材(3
)内部に青磁可能である部材(3a)が配合されて、弾
性部材(3)が永久磁化されている。前記弾性部材(3
)は多極着磁されていると共に、内部には補強部材(4
)が複数埋設されている。前記補強部材(4)は、平板
上の金属または高分子化合物等より成る。さらに、前記
補強部材(4)は多極着磁することもできる。また、永
久磁化された弾性部材(5)と補強部材(6)とを積層
して形成することもできる。前記補強部材(6)は平板
上の金属または高分子化合物等より成っており、多極着
磁することも可能である。In order to achieve the above object, the present invention provides an elastic member (3
) A celadon-enabled member (3a) is incorporated inside, and the elastic member (3) is permanently magnetized. The elastic member (3
) is multi-pole magnetized, and there is a reinforcing member (4
) are buried. The reinforcing member (4) is made of a flat metal, a polymer compound, or the like. Furthermore, the reinforcing member (4) can also be multi-pole magnetized. Alternatively, it can also be formed by laminating a permanently magnetized elastic member (5) and a reinforcing member (6). The reinforcing member (6) is made of a metal or a polymer compound on a flat plate, and can be multi-pole magnetized.
〔作用]
弾性部材(3)(5)内部に、配合された金属または高
分子化合物等よりなる部材(3a) (5a)を多極
着磁することにより、弾性部材(3) (5)が永久
磁化されるので、その磁力の復元力によって防振、免震
材が、地震等による強度の垂直方向の震動を吸収するこ
とができると共に、水平方向の震動をも吸収することが
できる。さらに弾性部材(5)及び補強部材(6)各々
が多極着磁されることにより弾性部材(5)と補強部材
(6)とを接着させる際に磁力の復元力によって、より
強固に密着させることができる。[Function] By magnetizing the members (3a) (5a) made of compounded metals or polymer compounds into multipoles inside the elastic members (3) (5), the elastic members (3) (5) Since it is permanently magnetized, the restoring force of the magnetic force allows the vibration isolation material to absorb strong vertical vibrations caused by earthquakes and the like, as well as horizontal vibrations. Furthermore, since the elastic member (5) and the reinforcing member (6) are each magnetized with multiple poles, when the elastic member (5) and the reinforcing member (6) are bonded together, the restoring force of the magnetic force allows them to be more firmly attached. be able to.
以下この発明の構成を実施例として示した図面に従って
説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below with reference to the drawings shown as embodiments.
第1図は、この発明の建造物用防振、免震材の第1実施
例を示す縦断正面図で、この発明の防振、免震材は、地
盤(A)と建造物(B)の間に設置されており、上下両
端に厚手の鋼板等より成る円板形の剛性部材(1)(2
)を固着した、合成ゴム等より成る略円柱形の弾性部材
(3)と、弾性部材(3)に埋設された補強部材(4)
から構成されている。FIG. 1 is a longitudinal sectional front view showing the first embodiment of the vibration isolation and seismic isolation material for buildings according to the present invention. Disk-shaped rigid members (1) (2) made of thick steel plates, etc. are installed at both upper and lower ends
) to which a substantially cylindrical elastic member (3) made of synthetic rubber or the like is fixed, and a reinforcing member (4) embedded in the elastic member (3).
It consists of
尚、弾性部材(3)の水平断面は円状でも角状でもよい
、さらに、中央部が垂直方向に中空でもよい。この中空
部は8棒等を挿入して作業ができるようになっており、
この発明の建造物用防振、免震材を製造する際や、移動
させる際に非常に便利である。また、前記弾性部材(3
)は、ゴム等の弾性を持つ材料が好ましいが、これらに
限られるものではない。Note that the horizontal cross section of the elastic member (3) may be circular or angular, and furthermore, the center portion may be hollow in the vertical direction. This hollow part allows work to be done by inserting 8 rods, etc.
It is very convenient when manufacturing and transporting the vibration isolation material for buildings according to the present invention. Moreover, the elastic member (3
) is preferably made of an elastic material such as rubber, but is not limited to these materials.
下側の剛性部材(2)は地盤(A)に固定され、上側の
剛性部材(1)は建造物(B)の底面に接触してこれを
支持している。従って、地震等の際には、弾性部材(3
)が変形し、建造物(B)と地盤(A)が相対的に変位
可能である。The lower rigid member (2) is fixed to the ground (A), and the upper rigid member (1) contacts and supports the bottom of the building (B). Therefore, in the event of an earthquake, etc., the elastic member (3
) is deformed, and the building (B) and the ground (A) can be relatively displaced.
また弾性部材(3)の内部には、金属または高分子化合
物等より成る部材(3a)が、配合されて着磁されてい
ると共に、補強部材(4)が埋設されている。Further, inside the elastic member (3), a member (3a) made of metal or a polymer compound is compounded and magnetized, and a reinforcing member (4) is embedded.
さらに、詳述すると弾性部材(3)は、第2図及び第3
図に示すように弾性部材(3)内部に配合された部材<
3a )が多極着磁されて、永久磁化されている。この
実施例では、周方向に多極着磁された場合(第2図)と
周方向に多極着磁すると共に積層するように着磁された
場合(第3図)を示しているが、着磁方法はこれらに限
られるものではない。尚、第3図に示す着磁方法の場合
、その上下左右の極はそれぞれ同一極を対向するように
しても、異なる極を対向させるようにしても実施可能で
ある。Furthermore, in detail, the elastic member (3) is shown in FIGS.
As shown in the figure, the members compounded inside the elastic member (3)
3a) is multipolar magnetized and permanently magnetized. This example shows the case of multi-polar magnetization in the circumferential direction (Fig. 2) and the case of multi-polar magnetization in the circumferential direction and stacked magnetization (Fig. 3). The magnetization method is not limited to these. In the case of the magnetization method shown in FIG. 3, the upper, lower, left, and right poles may be the same or different.
さらに、弾性部材(3)内部には、略円盤状の金属、高
分子化合物等より成る補強部材(4)が垂直方向水平に
適宜の間隔を開けて、複数埋設されている。この補強部
材(4)は、第4図に示すように多極着磁することも可
能である。従って、この補強部材(4)により、弾性部
材(3)は補強され、さらに、互いの磁力が反応しあっ
て震動による弾性部材(3)の変形を小さくするように
働く。尚、補強部材(4)の水平断面形状も円、角等い
ずれの形状でも実施可能であり、その中央部の弾性部材
(3)と対応する位置に、中空部が設けられていても実
施可能である。また、補強部材(4)に多極着磁された
極と、その上下の補強部材(4)に多極着磁された極と
を、それぞれ同一極が対向するようにしても、異なる極
を対向させるようにしても実施可能であるし、補強部材
(4)に単極着磁しても実施可能である。Further, inside the elastic member (3), a plurality of substantially disk-shaped reinforcing members (4) made of metal, polymer compound, etc. are buried at appropriate intervals in the vertical and horizontal directions. This reinforcing member (4) can also be multipolarized as shown in FIG. Therefore, the elastic member (3) is reinforced by the reinforcing member (4), and the mutual magnetic forces react with each other to reduce deformation of the elastic member (3) due to vibration. The horizontal cross-sectional shape of the reinforcing member (4) can be any shape such as a circle or a corner, and it can also be implemented even if a hollow part is provided in the central part of the reinforcing member (4) at a position corresponding to the elastic member (3). It is. Furthermore, even if the same poles are arranged to face each other, the multi-pole magnetized poles on the reinforcing member (4) and the multi-pole magnetized poles on the reinforcing members (4) above and below the reinforcing member (4) may be different. It is also possible to make the reinforcing member (4) face each other, and it is also possible to carry out the reinforcing member (4) by magnetizing it with a single pole.
第5図は、この発明の第2実施例を示す縦断正面図で、
複数の弾性部材(5)と、複数の補強部材(6)とを交
互に積層して積層体(7)が形成されている以外、他の
部材は第1実施例と全く同一である。FIG. 5 is a longitudinal sectional front view showing a second embodiment of the invention.
Other members are completely the same as in the first embodiment except that a laminate (7) is formed by alternately laminating a plurality of elastic members (5) and a plurality of reinforcing members (6).
この実施例では、第1実施例と同じ作用効果があり、さ
らに、弾性部材(5)内部に配合された金属及び高分子
化合物等より成る部材(5a)が着磁されることによっ
て、ゴム等よりなる弾性部材(5)と金属等より成る補
強部材(6)を接着する際に、磁力の働きによりゴムと
金属とが反発することなく強固に密着させることができ
るので、従来の製品で生じていた、弾性部材(5)と補
強部材(6)とが剥離するという問題点を解決できる。This embodiment has the same effect as the first embodiment, and furthermore, by magnetizing the member (5a) made of metal, polymer compound, etc. compounded inside the elastic member (5), rubber etc. When adhering the elastic member (5) made of rubber and the reinforcing member (6) made of metal, etc., the magnetic force allows the rubber and metal to adhere firmly without repulsion, which can occur with conventional products. This solves the problem that the elastic member (5) and the reinforcing member (6) come apart.
次に上記構成とした防振、免震材の作動状態について説
明する。Next, the operating state of the vibration isolation and seismic isolation material configured as described above will be explained.
先ず、列車、大型車両等の通過による振動が生じると、
地盤(A)に固定されている下側の剛性部材(2)が振
動するが、この振動の大部分が弾性部材(3)(5)に
よって吸収されるため、上側の剛性部材(1)にはほと
んど伝達されない。First, when vibrations occur due to passing trains, large vehicles, etc.
The lower rigid member (2) fixed to the ground (A) vibrates, but most of this vibration is absorbed by the elastic members (3) and (5), so the upper rigid member (1) is hardly transmitted.
このため、建造物(B)自体の振動は非常に小さいもの
となる。Therefore, the vibration of the building (B) itself becomes extremely small.
次に、地震が発生して地盤(A)に垂直方向の強度の震
動が生じると、弾性部材(3)内部に配合された部材(
3a)が着磁されているため、磁力の復元力の作用によ
り弾性部材(3)の伸縮を小さ(するように働き、さら
に、永久磁化された弾性部材(3)に埋設されて多極着
磁されている補強部材(4)は、震動による弾性部材(
3)の垂直方向の伸縮により、補強部材(4)同士が離
れようと作用するのに対して、着磁された磁力の復元力
によって互いをくっつけるように、震動を減衰させるよ
うに働くため、弾性部材(3)が、垂直方向の震動を吸
収して減衰することが可能と成る。Next, when an earthquake occurs and strong vibrations occur in the vertical direction in the ground (A), the material (
3a) is magnetized, it acts to reduce the expansion and contraction of the elastic member (3) due to the restoring force of the magnetic force, and is embedded in the permanently magnetized elastic member (3) to form a multi-pole attachment. The magnetized reinforcing member (4) is an elastic member (
The reinforcing members (4) act to separate from each other due to the vertical expansion and contraction of 3), but the restoring force of the magnetized magnetic force causes them to stick together and act to attenuate vibrations. The elastic member (3) can absorb and attenuate vibrations in the vertical direction.
同様に、永久磁化された弾性部材(5)と積層されて多
極着磁されている補強部材(6)は、磁力の復元力によ
って、弾性部材(5)の伸縮を小さくすると共に補強部
材(6)同士をくっつけるように、震動を減衰させるよ
うに働くため、弾性部材(5)と補強部材(6)との積
層体(7)が、垂直方向の震動を吸収して減衰すること
が可能と成る。Similarly, the reinforcing member (6), which is laminated with the permanently magnetized elastic member (5) and is multi-pole magnetized, reduces the expansion and contraction of the elastic member (5) by the restoring force of the magnetic force, and the reinforcing member ( 6) The laminate (7) of the elastic member (5) and reinforcing member (6) can absorb and attenuate vibrations in the vertical direction, as they work to attenuate vibrations by attaching them to each other. becomes.
さらに、弾性部材(3)(5)及び補強部材(4)(6
)の磁力による水平方向の復元力の作用により、弾性部
材(3)(5)が水平方向の震動をも吸収して減衰させ
るように働く。Furthermore, elastic members (3) (5) and reinforcing members (4) (6)
) The elastic members (3) and (5) work to absorb and attenuate horizontal vibrations due to the horizontal restoring force caused by the magnetic force of the elastic members (3) and (5).
従って、地震等によるビル、小住宅、床等の垂直方向及
び水平方向の震動を吸収することができる。Therefore, vertical and horizontal vibrations of buildings, small houses, floors, etc. caused by earthquakes can be absorbed.
この発明は上述のような構成を有するものであり、従っ
て、弾性部材(3)と、弾性部材(3)に埋設された補
強部材(4)の一方または各々に多極着磁された磁力の
復元力。弾性部材(5)と、弾性部材(5)と交互に積
層された補強部材(6)の一方または各々に多極着磁さ
れた磁力の復元力によって、地震等による垂直方向のの
震動を吸収することができる。This invention has the above-mentioned configuration, and therefore, the elastic member (3) and one or each of the reinforcing members (4) embedded in the elastic member (3) have a multipolar magnetized magnetic force. Resilience. Absorbs vibrations in the vertical direction due to earthquakes, etc. by the restoring force of the magnetic force multipolarized to one or each of the elastic member (5) and the reinforcing member (6), which is laminated alternately with the elastic member (5). can do.
同様に、各補強部材(4)(6)に多極着磁された磁力
の復元力によって、水平方向の震動をも吸収することが
できる。Similarly, vibrations in the horizontal direction can also be absorbed by the restoring force of the multi-pole magnetized magnetic force of each of the reinforcing members (4) and (6).
さらに、弾性部材(5)及び補強部材(6)を着磁させ
ることによって、弾性部材(5)と補強部材(6)とを
接着する際に、従来は接着しにくかったゴム等よりなる
弾性部材(5)と金属等より成る補強部材(6)とを、
磁力の作用により強固に密着させることが可能となり弾
性部材(5)と補強部材(6)との、剥離が生じること
がないよって、この発明の建造物用防振、免震材を建造
物等に設置することによって、建造物等を地震などの被
害から守ることができる。Furthermore, by magnetizing the elastic member (5) and the reinforcing member (6), when adhering the elastic member (5) and the reinforcing member (6), an elastic member made of rubber or the like, which has been difficult to bond in the past, can be used. (5) and a reinforcing member (6) made of metal or the like,
Since the elastic member (5) and the reinforcing member (6) can be firmly attached to each other by the action of magnetic force, and there will be no separation between the elastic member (5) and the reinforcing member (6), the vibration-proofing and seismic isolation material for buildings of the present invention can be used in buildings, etc. By installing such systems, buildings can be protected from damage such as earthquakes.
第1図は、この発明の建造物用防振、免震材の第1実施
例を示す縦断説明図。第2図は、多極着磁された弾性部
材の実施例を示す部分斜視図。第3図は、多極着磁され
た弾性部材の他の実施例を示す部分斜視図。第4図は、
着磁された補強部材が弾性部材に埋設されている状態を
示す説明図。
第5図は、この発明の建造物用防振、免震材の第2実施
例を示す縦断面図。
(1)(2)・・・剛性部材 (3)(5)・・・弾性
部材 (4)(6)・・・補強部材 (3a) (5
a)・・・部材 (A)・・・地盤 (B)・・−建造
物第1図FIG. 1 is a longitudinal cross-sectional view showing a first embodiment of the vibration isolation material for buildings according to the present invention. FIG. 2 is a partial perspective view showing an embodiment of a multipolar magnetized elastic member. FIG. 3 is a partial perspective view showing another embodiment of a multipolar magnetized elastic member. Figure 4 shows
FIG. 7 is an explanatory diagram showing a state in which a magnetized reinforcing member is embedded in an elastic member. FIG. 5 is a longitudinal cross-sectional view showing a second embodiment of the vibration isolation material for buildings according to the present invention. (1)(2)...Rigid member (3)(5)...Elastic member (4)(6)...Reinforcement member (3a) (5
a)...Components (A)...Ground (B)...-Building Figure 1
Claims (1)
盤(A)にそれぞれ接触・固定される一対の剛性部材(
1)(2)を固着して成る防振、免震材において、弾性
部材(3)内部に金属または高分子化合物等の着磁可能
である部材(3a)が配合されて、弾性部材(3)が永
久磁化されていることを特徴とする建造物用防振、免震
材。 2、上記弾性部材(3)が、多極着磁されていることを
特徴とする請求項1に記載の建造物用防振、免震材。 3、上記弾性部材(3)内部に、補強部材(4)が複数
埋設されていることを特徴とする請求項1または2に記
載の建造物用防振、免震材。 4、上記補強部材(4)が、平板上の金属または高分子
化合物等より成り、さらに、多極着磁されていることを
特徴とする請求項3に記載の建造物用防振、免震材。 5、弾性部材(5)の上下両端に、建造物(B)及び地
盤(A)にそれぞれ接触・固定される一対の剛性部材(
1)(2)を固着して成る防振、免震材において、その
内部に金属または高分子化合物等の着磁可能である部材
(5a)が配合されて、弾性部材(5)が永久磁化され
ると共に、磁化された弾性部材(5)と補強部材(6)
とが積層されていることを特徴とする建造物用防振、免
震材。 6、上記補強部材(6)が、多極着磁されていることを
特徴とする請求項5に記載の建造物用防振、免震材。 7、上記補強部材(6)が、平板上の金属または高分子
化合物等より成ることを特徴とする請求項5又は6に記
載の建造物用防振、免震材。[Claims] 1. At both upper and lower ends of the elastic member (3), a pair of rigid members (
1) In the vibration isolation and seismic isolation material formed by fixing (2), a magnetizable member (3a) such as a metal or a polymer compound is blended inside the elastic member (3). ) is permanently magnetized. 2. The vibration isolation and seismic isolation material for buildings according to claim 1, wherein the elastic member (3) is multi-pole magnetized. 3. The vibration isolation and seismic isolation material for buildings according to claim 1 or 2, characterized in that a plurality of reinforcing members (4) are embedded inside the elastic member (3). 4. The vibration isolation and seismic isolation for buildings according to claim 3, wherein the reinforcing member (4) is made of a flat plate of metal or a polymer compound, and is further magnetized with multiple poles. Material. 5. At both upper and lower ends of the elastic member (5), a pair of rigid members (
1) In the vibration isolation and seismic isolation material formed by fixing (2), a magnetizable member (5a) such as a metal or a polymer compound is blended inside the material, and the elastic member (5) is permanently magnetized. and magnetized elastic member (5) and reinforcing member (6).
A vibration-proofing and seismic isolation material for buildings, characterized by being laminated with and. 6. The vibration isolation and seismic isolation material for buildings according to claim 5, wherein the reinforcing member (6) is multipolar magnetized. 7. The vibration-proofing and seismic isolation material for buildings according to claim 5 or 6, wherein the reinforcing member (6) is made of a flat metal, a polymer compound, or the like.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20209488A JPH0249832A (en) | 1988-08-12 | 1988-08-12 | Vibration preventive, anti-seismic construction material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20209488A JPH0249832A (en) | 1988-08-12 | 1988-08-12 | Vibration preventive, anti-seismic construction material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0249832A true JPH0249832A (en) | 1990-02-20 |
Family
ID=16451869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20209488A Pending JPH0249832A (en) | 1988-08-12 | 1988-08-12 | Vibration preventive, anti-seismic construction material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0249832A (en) |
-
1988
- 1988-08-12 JP JP20209488A patent/JPH0249832A/en active Pending
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