JPH0333531A - Vibration isolator - Google Patents

Abstract

PURPOSE:To stabilize vibration isolating property by connecting a load carrying platform and a base to be loaded with machinery to each other through a series of suspension members respectively engaging with both parts and having small flexural rigidity, and further connecting the platform and the base through longer subsidiary suspension members than the suspension members. CONSTITUTION:An outside case 4 and an inside case 5 respectively engaged with beam-like members 41 and 51 are connected to each other through suspension members 6 of length (l1), and the beginning end and the ending end of the suspension member 6 are connected to each other with a connecting metal piece 9. Further, a base 1 and a load carrying platform 2 are connected to each other through subsidiary suspension members 16 of length (l2). At vibration of the base 1, the position of the base is moved from A-A to B-B, and the fitting positions of the subsidiary suspension member is moved from O2-D to O2-D'. Hereupon, the distance (l2') between the fitting positions of the subsidiary suspension member is expressed as follows: l2'=(l -2(l2-l1)delta)<1/2>, where delta is displacement in the vertical direction. Consequently, l2'<=l2 is brought in case of l1<=l2, and as the subsidiary suspension member is slackened and applied by no load at vibration of the base, generation of impulsive force at emergency is prevented without influence on the vibration isolating performance.

Description

【発明の詳細な説明】 〔発明の目的〕 （産業上の利用分野） 本発明は吊り部材を改良した振動絶縁装置に関する。[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a vibration isolating device with an improved hanging member.

（従来の技術） 従来、建築物を地震等の振動を原因とする災害から保護
することや、精密機器を輸送時の路面振動から保護する
ことを目的として、特開昭６３７２９３６号公報等で知
られる如く第７図、第８図に示すような振動絶縁装置で
ある。(Prior Art) Conventionally, there has been a method known in Japanese Patent Laid-Open No. 6372936 etc. for the purpose of protecting buildings from disasters caused by vibrations such as earthquakes, and protecting precision equipment from road vibration during transportation. This is a vibration isolating device as shown in FIGS. 7 and 8.

この装置は、ベース１と荷台または床面２との間に振動
絶縁装置３が配置されている。この装置は、外側ケース
４と内側ケース５、および両ケースの間を連結する剛性
の小さい部材６Ａから成り、外側ケース４はベース１に
、内側ケース５は荷台（床面）２に、それぞれボルト７
によって固定されている。そして、ベース１上に精密機
器が載置される。In this device, a vibration isolating device 3 is arranged between a base 1 and a loading platform or a floor surface 2. This device consists of an outer case 4, an inner case 5, and a low-rigidity member 6A that connects the two cases. 7
Fixed by Then, precision instruments are placed on the base 1.

しかしながら、この従来の装置にあっては、吊材６Ａの
一本一本が独立して設けられているので、特定の吊材６
Ａに過度の荷重が作用する恐れがある。However, in this conventional device, each hanging material 6A is provided independently, so a specific hanging material 6A is provided independently.
There is a risk that excessive load will be applied to A.

このため、吊材６Ａは十分な強度を得るために大きなも
のとする必要がある。これにより、吊材６Ａの曲げ剛性
が大きくなり、振動絶縁性能が悪くなる。Therefore, the hanging material 6A needs to be large in order to obtain sufficient strength. As a result, the bending rigidity of the hanging member 6A increases, and the vibration insulation performance deteriorates.

また、吊材６Ａの長さを調整することで、各吊材６Ａに
作用する荷重を均一化することも考えられるがこの場合
でも、完全に荷重の均一化を図ることはできない。It is also possible to equalize the load acting on each hanging material 6A by adjusting the length of the hanging material 6A, but even in this case, it is not possible to completely equalize the load.

荷重の均一化を計るために一連の曲げ剛性の小さい吊り
部材を用いると、吊り部材が破断した場合に機器に衝撃
力が作用することがある。If a series of hanging members with low bending rigidity is used to equalize the load, an impact force may be applied to the equipment if the hanging member breaks.

（発明が解決しようとする課題） このように、従来の振動絶縁装置においては、吊材が一
本一本独立して設けられていたので、吊材に均一荷重を
作用させることができなかった。(Problem to be solved by the invention) As described above, in the conventional vibration isolating device, each hanging member was provided independently, so it was not possible to apply a uniform load to the hanging members. .

また、吊材に均一荷重を作用させるために一連の曲げ剛
性の小さい吊り部材を用いると、吊り部材が破断した場
合に機器に衝撃力が作用することがある。Furthermore, if a series of hanging members with low bending rigidity is used to apply a uniform load to the hanging members, an impact force may be applied to the equipment when the hanging members break.

本発明は上記の点を考慮して威されたもので、安定した
振動絶縁性能を有する振動絶縁装置を提供することを目
的とする。The present invention was developed in consideration of the above points, and an object of the present invention is to provide a vibration isolating device having stable vibration isolating performance.

〔発明の構成〕[Structure of the invention]

（課題を解決するための手段） 」二記目的を遠戚するために、本発明において３− は荷台と機器を積載するベースとの間を交互に係合する
曲げ剛性の小さい一連の吊り部材で連結し、さらに荷台
とベースとを吊り部材よりも長い補助吊り部材によって
連結している。(Means for Solving the Problems) In order to further achieve the object described in item 2, in the present invention, 3- is a series of hanging members with low bending rigidity that alternately engage between a loading platform and a base on which equipment is loaded. Furthermore, the loading platform and the base are connected by an auxiliary hanging member that is longer than the hanging member.

（作用） このように構成することにより、吊り部材に均等に荷重
を作用させることができるとともに、吊り部材が破断し
た場合にも、機器に衝撃力をＪｊえることが無い。(Function) With this configuration, it is possible to apply a load evenly to the hanging member, and even if the hanging member breaks, no impact force is applied to the equipment.

（実施例） 以下本発明の一実施例を第１図から第３図を参照して説
明する。即ち、重量物と輸送車の荷台（またはフレーム
）２間には振動絶縁装置３が装着される。(Example) An example of the present invention will be described below with reference to FIGS. 1 to 3. That is, a vibration isolator 3 is installed between the heavy object and the carrier (or frame) 2 of the transport vehicle.

この振動絶縁装置３は上端部にはり状部材４１を有する
外側ケース４と、下端部にはり状部材５１を有する内側
ケース５とを備えている。そして、外側ケース４と内側
ケース５間は、外側ケース４のはり状部材４１と内側ケ
ース５のはり状部材５１に交互に茶会する一連の曲げ剛
性の小さい吊り部材６４− で連結する。尚、吊り部材６の始端と終端は、連結金具
９で連結する。即ち、荷台２上には振動絶縁装置３を介
して機器８が載置される。This vibration isolating device 3 includes an outer case 4 having a beam-like member 41 at its upper end, and an inner case 5 having a beam-like member 51 at its lower end. The outer case 4 and the inner case 5 are connected by a series of hanging members 64- with low bending rigidity that alternately connect the beam-like members 41 of the outer case 4 and the beam-like members 51 of the inner case 5. The starting end and the ending end of the hanging member 6 are connected by a connecting fitting 9. That is, the equipment 8 is placed on the loading platform 2 via the vibration isolating device 3 .

また、ベース１と荷台２とは補助吊り部材１６によって
連結されている。Further, the base 1 and the loading platform 2 are connected by an auxiliary hanging member 16.

ここで、本実施例の構成による作用効果を説明する。本
実施例においては、ベース１を６個の振動絶縁装置３で
荷台２に吊り下げる構成としている。このため、機器８
を載置することにより発生する荷重は、吊り部材６にほ
ぼ均等に作用する。Here, the effects of the configuration of this embodiment will be explained. In this embodiment, the base 1 is suspended from the loading platform 2 by six vibration isolators 3. For this reason, equipment 8
The load generated by placing the hanging member 6 acts almost equally on the hanging member 6.

また、吊り部材の長さをＱｌ、重力速度をｇとするとこ
の様な系の固有振動数ｆは、次式で表される。Further, assuming that the length of the hanging member is Ql and the gravitational velocity is g, the natural frequency f of such a system is expressed by the following equation.

ｆ　＝　（１／２π）・４ｇ／氾□　　　　　　　　　
　（１）即ち、系の固有振動数は機器の重量には依存せ
ず吊り部材６の長さのみによって決まる。従って、絶縁
しようとする振動の周波数から系の固有振動数をずらす
ことが容易にできるという利点がある。f = (1/2π)・4g/flood□
(1) That is, the natural frequency of the system does not depend on the weight of the equipment and is determined only by the length of the hanging member 6. Therefore, there is an advantage that the natural frequency of the system can be easily shifted from the frequency of the vibration to be isolated.

ベース振動時には第３図に示すように、ベース位置がＡ
−ＡからＢ−Ｂに移動し、補助吊り部材の取付は位置が
０２−Ｄから０２−Ｄ’に移動する。補助吊り部材の取
付は位置間の距離Ｑ２′　は、次式で表される。When the base is vibrating, the base position is A as shown in Figure 3.
-A to B-B, and the attachment of the auxiliary hanging member moves from 02-D to 02-D'. The distance Q2' between the mounting positions of the auxiliary hanging members is expressed by the following equation.

ΔＱ２＝悲、′−（悲□−δ）２ したがって、（吊り部材の吊り長さ＝Ｑ□）≦（補助吊
り部材の吊り長さ：Ｑ２）の場合氾２′≦Ｑ２となり、
ベース振動時に補助吊り部材はたるみ、荷重が加わるこ
とが無いため、振動絶縁性能に影響を及ぼすことなく、
非常時の衝撃力発生を防ぐことができるという利点があ
る。ΔQ2 = Sad,'-(Sad□-δ)2 Therefore, if (Hanging length of hanging member = Q□)≦(Hanging length of auxiliary hanging member: Q2), flood 2'≦Q2,
When the base vibrates, the auxiliary suspension member sag and no load is applied, so the vibration isolation performance is not affected.
This has the advantage of being able to prevent the generation of impact force in an emergency.

尚、本発明は上記実施例に限定されるものではない。例
えば、第４図および第５図に示す如く、ベースｌと荷台
２とを変位拘束部材１８によって連結してもよい。この
場合、ベースが振動することによりＥ点がＥ′点に移動
するため０３とＥ′との距離Ｑ３′　は長くなる。した
がって、変位拘束部材の吊り長さ九′とすると、水平方
向の変位をΔ氾以下、上下方向の変位をδ以下に拘束で
きる。Note that the present invention is not limited to the above embodiments. For example, as shown in FIGS. 4 and 5, the base l and the loading platform 2 may be connected by a displacement restraining member 18. In this case, as the base vibrates, point E moves to point E', so the distance Q3' between 03 and E' becomes longer. Therefore, if the suspension length of the displacement restraining member is 9', the horizontal displacement can be restrained to less than Δ flood, and the vertical displacement can be restrained to less than δ.

また、第６図に示すように振動絶縁装置を荷台の下に配
置しても同様の効果が期待できる。Further, the same effect can be expected even if the vibration isolating device is placed under the loading platform as shown in FIG.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明においては、外側ケースの上
端部と内側ケースの下端部を交互に畜舎する曲げ剛性の
小さい吊り部材で連結し、さらに吊り部材よりも長い補
助吊り部材を配置したので、吊り部材に均等に荷重が作
用させることができ、吊り部材破断時にも安定した振動
絶縁装置を提供することができる。As explained above, in the present invention, the upper end of the outer case and the lower end of the inner case are connected by alternating hanging members with low bending rigidity, and furthermore, auxiliary hanging members longer than the hanging members are arranged. A load can be applied evenly to the hanging member, and a stable vibration isolating device can be provided even when the hanging member breaks.

【図面の簡単な説明】[Brief explanation of drawings]

第工図は本発明の一実施例を示す振動絶縁装置の構成図
、第２図は第１図に示す振動絶縁装置の断面図、第３図
は第１図の動作説明図、第４図は本発明の異なる実施例
を示す振動絶縁装置の構成図、第５図は第４図の説明図
、第・６図は本発明の異なる実施例を示す振動絶縁装置
の説明図、第７図は従来の振動絶縁装置を示す断面図、
第８図は従来の振動絶縁装置の構成図である。 １　・ベース、　　　　２　・荷台（またはフレーム）
、３・振動絶縁装置、 ４１・・・はり状部材、 ５１・・・はり状部材、 ７・・・ボルト、 ９・・連結金具、 １１・・・支持部材、 １８・・・変位拘束部材。 ４・・外側ケース、 ５・・内側ケース、 ６・・吊り部材、 ８・・・機器、 １０・・ダンパー １６・・補助吊り部材、The first engineering drawing is a configuration diagram of a vibration isolating device showing an embodiment of the present invention, FIG. 2 is a sectional view of the vibration isolating device shown in FIG. 1, FIG. 3 is an explanatory diagram of the operation of FIG. 1, and FIG. 5 is an explanatory diagram of the vibration isolating device showing different embodiments of the present invention, FIG. 5 is an explanatory diagram of FIG. 4, FIGS. is a cross-sectional view showing a conventional vibration isolator,
FIG. 8 is a configuration diagram of a conventional vibration isolating device. 1. Base, 2. Loading platform (or frame)
, 3. Vibration isolating device, 41... Beam-like member, 51... Beam-like member, 7... Bolt, 9... Connecting fitting, 11... Supporting member, 18... Displacement restraining member. 4... Outer case, 5... Inner case, 6... Hanging member, 8... Equipment, 10... Damper 16... Auxiliary hanging member,

Claims (1)

【特許請求の範囲】 輸送用車両の荷台等に精密機器を設置する際に、荷台と
機器を積載するベースとの間に配設される振動絶縁装置
において、 荷台と機器を積載するベースのいずれか一方に内側ケー
スを、他方に外側ケースを取付け、これらケース間を吊
り長さｌ＿１の曲げ剛性の小さい吊り部材によって連結
し、 さらに荷台と機器を積載するベースの間を吊り長さｌ＿
２の補助吊り部材によって連結しｌ＿１≦ｌ＿２とした
ことを特徴とする振動絶縁装置。[Scope of Claims] A vibration isolating device that is installed between the loading platform and a base on which the equipment is loaded when precision equipment is installed on the loading platform of a transportation vehicle, which The inner case is attached to one side and the outer case is attached to the other, and these cases are connected by a hanging member with low bending rigidity with a hanging length l_1, and a hanging length l_1 is connected between the loading platform and the base on which the equipment is loaded.
A vibration isolating device characterized in that it is connected by two auxiliary hanging members so that l_1≦l_2.