JP2013053661A - Vibration-free pedestal - Google Patents
Vibration-free pedestal Download PDFInfo
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- JP2013053661A JP2013053661A JP2011191829A JP2011191829A JP2013053661A JP 2013053661 A JP2013053661 A JP 2013053661A JP 2011191829 A JP2011191829 A JP 2011191829A JP 2011191829 A JP2011191829 A JP 2011191829A JP 2013053661 A JP2013053661 A JP 2013053661A
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 title abstract 3
- 230000001105 regulatory effect Effects 0.000 claims abstract description 43
- 230000001603 reducing effect Effects 0.000 claims abstract description 26
- 230000037431 insertion Effects 0.000 claims description 35
- 238000003780 insertion Methods 0.000 claims description 35
- 230000006835 compression Effects 0.000 claims description 25
- 238000007906 compression Methods 0.000 claims description 25
- 239000006096 absorbing agent Substances 0.000 claims description 24
- 239000000463 material Substances 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000035939 shock Effects 0.000 abstract description 3
- 241001247986 Calotropis procera Species 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000000116 mitigating effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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Abstract
Description
本発明は、空調室外機等のような振動発生機器で発生した振動を吸収する防振架台に関する。 The present invention relates to a vibration isolating stand that absorbs vibrations generated by a vibration generating device such as an air conditioner outdoor unit.
従来より、空調室外機などの振動発生機器から発生する振動が基礎に伝わるのを防止するため、振動発生機器と基礎との間に防振架台が介装されている（例えば、特許文献１参照）。 Conventionally, in order to prevent vibration generated from a vibration generating device such as an air conditioner outdoor unit from being transmitted to the foundation, a vibration isolator is interposed between the vibration generating device and the foundation (for example, see Patent Document 1). ).
この防振架台は、基礎に取り付けられる矩形状の「下枠」と、振動発生機器が載置・固定される矩形状の「上枠」と、上枠および下枠の間に設けられ、上枠に載置・固定されるのが振動発生機器の荷重やその振動を受止める「吸振体」と、上枠と下枠との上下方向での配置間隔が設定範囲内に収まるよう規制すると共に、水平方向のズレ量を規制する「上枠移動量規制部」とで大略構成されている。 This anti-vibration stand is provided between the rectangular “lower frame” attached to the foundation, the rectangular “upper frame” on which the vibration generating device is placed and fixed, and the upper and lower frames. It is placed and fixed on the frame so that the load of the vibration generating device and the vibration absorber that receives the vibration and the arrangement interval in the vertical direction between the upper frame and the lower frame are regulated to be within the set range. The upper frame movement amount restricting unit that restricts the amount of deviation in the horizontal direction is roughly configured.
従来の防振架台では、上述したように上枠と下枠との上下方向での配置間隔が設定範囲内に収まるよう規制すると共に、水平方向のズレ量を規制する「上枠移動量規制部」が設けられているので、地震等が発生して防振架台に垂直或いは水平方向の大きな力が作用した際、上枠移動量規制部に損傷などがなく、この上枠移動量規制部が耐震構造として有効に機能している場合には、上枠に載置・固定した機器の転倒や転倒に伴なう機器の損傷などを防止することができる。 In the conventional anti-vibration mount, as described above, the upper frame movement amount regulating unit regulates the vertical gap between the upper frame and the lower frame within the set range and regulates the horizontal shift amount. Therefore, when an earthquake or the like occurs and a large vertical or horizontal force is applied to the anti-vibration stand, the upper frame movement amount restricting portion is not damaged. When it functions effectively as an earthquake-resistant structure, it is possible to prevent the equipment mounted on and fixed to the upper frame from being overturned and the equipment to be damaged due to the overturn.
しかしながら、想定の範囲を超えるような巨大地震が発生し、地震発生当初この上枠移動量規制部に過大な振動エネルギーが与えられて当該上枠移動量規制部が損傷を受け、耐震構造として有効に機能できなくなったような場合には、その後の大きな揺れによって上枠に載置・固定した機器が転倒し損傷するようになると云った虞がある。 However, a huge earthquake exceeding the expected range occurred, and when the earthquake occurred, excessive vibration energy was given to the upper frame movement restriction part and the upper frame movement restriction part was damaged, making it effective as an earthquake resistant structure. In the event that it becomes impossible to function properly, there is a risk that the device placed and fixed on the upper frame will fall over and be damaged by a large shake thereafter.
つまり、従来の防振架台は、上枠移動量規制部の剛性や強度でもって地震に対抗する耐震構造を有するものであったが、このような耐震構造は、想定される地震の規模に対応した剛性や強度の確保に偏向し、地震による衝撃力の緩和と云う観点に欠けていた。 In other words, the conventional anti-vibration frame has an earthquake-resistant structure that resists earthquakes with the rigidity and strength of the upper frame movement restriction part. However, it lacked the viewpoint of mitigating the impact force caused by earthquakes.
それゆえに、本発明の主たる課題は、部材の剛性や強度でもって地震に対抗する耐震構造のみならず、地震による衝撃力を減退・緩和させる減震技術を付加した防振架台を提供することである。 Therefore, the main problem of the present invention is to provide not only an earthquake-resistant structure that resists earthquakes by the rigidity and strength of members, but also a vibration isolator that is added with an anti-vibration technology that reduces and mitigates the impact force caused by an earthquake. is there.
本発明における第１の発明は、
（ａ）荷重担持面１２に設置される下枠１４と、搭載機器Ｍが載置される上枠１６と、前記下枠１４と前記上枠１６との間に配置される吸振体２２と、前記下枠１４に対して前記上枠１６の上下及び水平方向の移動量を規制する上枠移動量規制部１８とを具備する防振架台１０において、
（ｂ）前記上枠移動量規制部１８が、
前記下枠１４又は前記上枠１６に設けられた規制ボルト５２と、
前記下枠１４又は前記上枠１６に形成され、前記規制ボルト５２が間隙ｄを持って挿通される挿通孔３３と、
前記下枠１４又は前記上枠１６の挿通孔３３を越えた規制ボルト５２の先端部分に螺着された上枠移動量規制ナット６０と、
前記規制ボルト５２の前記下枠１４と前記上枠１６との間のシャフト部分に前記下枠１４と前記上枠１６に対してクリアランスＣを持って保持され、規制ボルト５２，下枠１４及び上枠１６よりも機械的強度の小さい減震ワッシャ２０とで構成されている
（ｃ）ことを特徴とする防振架台１０である。
The first invention in the present invention is:
(A) a lower frame 14 installed on the load carrying surface 12, an upper frame 16 on which the mounting device M is placed, a vibration absorber 22 disposed between the lower frame 14 and the upper frame 16, In the anti-vibration mount 10 having the upper frame movement amount regulating unit 18 that regulates the movement amount of the upper frame 16 in the vertical and horizontal directions with respect to the lower frame 14;
(B) The upper frame movement amount restricting portion 18 is
A restriction bolt 52 provided on the lower frame 14 or the upper frame 16, and
An insertion hole 33 formed in the lower frame 14 or the upper frame 16 and through which the restriction bolt 52 is inserted with a gap d;
An upper frame movement amount regulating nut 60 screwed to the tip end portion of the regulating bolt 52 beyond the insertion hole 33 of the lower frame 14 or the upper frame 16;
A shaft portion between the lower frame 14 and the upper frame 16 of the restriction bolt 52 is held with a clearance C with respect to the lower frame 14 and the upper frame 16. The anti-vibration stand 10 is characterized in that the anti-vibration washer 20 has a mechanical strength smaller than that of the frame 16 (c).
前述のように地震の際に搭載機器Ｍを載置した上枠１６に対して上下又は水平方向に下枠１４が大きく揺れ動き、それに呼応して搭載機器Ｍを載置した上枠１６も大きく揺れ動き、その間に下枠１４や上枠１６が減震ワッシャ２０に激しく衝突することになるが、本発明では、規制ボルト５２のシャフト部分に、上枠１６と下枠１４との間にクリアランスＣを持って、規制ボルト５２，下枠１４及び上枠１６よりも機械的強度の小さい減震ワッシャ２０を螺装しているので、下枠１４や上枠１６の相対移動量が下枠１４と上枠１６との間の距離Ｔよりも遥かに狭いクリアランスＣだけ移動しただけで減震ワッシャ２０に激しく衝突することになる。このことは移動初期の加速度の小さい段階で減震ワッシャ２０に衝突することを意味する。そしてその時に機械的強度の小さい減震ワッシャ２０が変形或いは破損することによって、移動初期段階で地震のエネルギーを減殺させることになり、その結果、減震ワッシャ２０が変形或いは破損後に規制ボルト５２、下枠１４及び上枠１６に地震のエネルギーが加わったとしても、もはや該エネルギーは規制ボルト５２、下枠１４又は上枠１６を破損させるだけのものは残っておらず、これらの地震による破損を免れさせることが出来る。 As described above, in the event of an earthquake, the lower frame 14 largely shakes in the vertical or horizontal direction with respect to the upper frame 16 on which the mounted device M is mounted, and the upper frame 16 on which the mounted device M is mounted responds to the upper frame 16. In the meantime, the lower frame 14 and the upper frame 16 collide violently with the vibration reducing washer 20, but in the present invention, a clearance C is provided between the upper frame 16 and the lower frame 14 on the shaft portion of the regulating bolt 52. Therefore, since the vibration reducing washer 20 having a mechanical strength smaller than that of the regulating bolt 52, the lower frame 14, and the upper frame 16 is screwed, the relative movement amount of the lower frame 14 and the upper frame 16 is increased with respect to the lower frame 14 and the upper frame 16. Just by moving by a clearance C that is much narrower than the distance T between the frame 16 and the shock absorber 20, the shock absorber 20 is struck violently. This means that it collides with the vibration reducing washer 20 at a stage where the acceleration at the initial stage of movement is small. At that time, the seismic washer 20 having a low mechanical strength is deformed or broken, so that the energy of the earthquake is reduced in the initial stage of movement. As a result, the regulation bolt 52, after the seismic washer 20 is deformed or broken, Even if an earthquake energy is applied to the lower frame 14 and the upper frame 16, the energy is no longer left to damage the regulating bolt 52, the lower frame 14 or the upper frame 16, and damage due to these earthquakes is not caused. You can be spared.
本発明における第２の発明は、
（イ）荷重担持面１２に設置される下枠１４と、搭載機器Ｍが載置される上枠１６と、前記下枠１４と前記上枠１６との間に配置される吸振体２２と、前記下枠１４に対して前記上枠１６の上下及び水平方向の移動量を規制する上枠移動量規制部１８とを具備する防振架台１０において、
（ロ）前記吸振体２２が、
荷重担持用の圧縮コイルばね６６と、
前記圧縮コイルばね６６の下部に取り付けられる下部ケース６２と、
前記圧縮コイルばね６６の上部に取り付けられ、前記圧縮コイルばね６６の上面および側面を覆う上部ケース６４と、
前記圧縮コイルばね６６の内側に遊挿された外筒７０ａ、及び前記外筒７０ａの内面との間に前記上枠移動量規制部１８が許容する水平方向の移動距離よりも狭いクリアランスＣ３を持って遊挿され、前記外筒７０ａよりも機械的強度の小さい内筒７０ｂを備える減震機構７０とで構成されている
（ニ）ことを特徴とする防振架台１０である。
The second invention in the present invention is:
(A) a lower frame 14 installed on the load carrying surface 12, an upper frame 16 on which the mounting device M is placed, a vibration absorber 22 disposed between the lower frame 14 and the upper frame 16, In the anti-vibration mount 10 having the upper frame movement amount regulating unit 18 that regulates the movement amount of the upper frame 16 in the vertical and horizontal directions with respect to the lower frame 14;
(B) The vibration absorber 22 is
A compression coil spring 66 for carrying a load;
A lower case 62 attached to the lower portion of the compression coil spring 66;
An upper case 64 attached to an upper portion of the compression coil spring 66 and covering an upper surface and a side surface of the compression coil spring 66;
Between the outer cylinder 70a loosely inserted inside the compression coil spring 66 and the inner surface of the outer cylinder 70a, there is a clearance C3 that is narrower than the horizontal movement distance allowed by the upper frame movement amount restricting portion 18. The anti-vibration mount 10 is characterized in that it is constituted by a vibration-reducing mechanism 70 including an inner cylinder 70b having a mechanical strength smaller than that of the outer cylinder 70a.
上述した上枠移動量規制部１８と同様に、想定の範囲を超えるような巨大地震が発生して防振架台１０に過大な振動エネルギーが与えられると、上枠移動量規制部１８のみならず吸振体２２も損傷を受け、最悪の場合、防振機能を発揮することができなくなる。 Similarly to the above-described upper frame movement amount restriction unit 18, when a huge earthquake exceeding the assumed range occurs and excessive vibration energy is given to the vibration isolator 10, not only the upper frame movement amount restriction unit 18. The vibration absorber 22 is also damaged, and in the worst case, the vibration isolation function cannot be exhibited.
そこで、本発明では、吸振体２２の内部に、圧縮コイルばね６６の内側に遊挿された外筒７０ａと、外筒７０ａの内面との間に上枠移動量規制部１８によって許容された移動距離よりも狭いクリアランスＣ３を持って遊挿され、外筒７０ａよりも機械的強度の小さい内筒７０ｂとで構成された減震機構７０を設けているので、地震の際、下枠１４や上枠１６の水平方向における相対移動量が上枠移動量規制部１８によって許容された移動距離よりも狭いクリアランスＣ３だけ移動しただけで外筒７０ａと内筒７０ｂとが激しく衝突することになる。このことは移動初期の加速度の小さい段階で減震機構７０を構成する外筒７０ａと内筒７０ｂとが衝突することを意味する。そしてその時に機械的強度の小さい内筒７０ｂが変形或いは破損することによって、移動初期段階で水平方向の地震エネルギーを減殺させることになり、その結果、内筒７０ｂが変形或いは破損後に規制ボルト５２、下枠１４及び上枠に水平方向の地震エネルギーが加わったとしても、もはや該エネルギーは規制ボルト５２、下枠１４又は上枠１６を破損させるだけのものは残っておらず、これらの地震による破損を免れさせることが出来る。そして、規制ボルト５２、下枠１４及び上枠１６が破損から守られている以上、吸振体２２が損傷するのを確実に防止することができる。 Therefore, in the present invention, the movement allowed by the upper frame movement amount restricting portion 18 between the outer cylinder 70a loosely inserted inside the compression coil spring 66 and the inner surface of the outer cylinder 70a inside the vibration absorber 22. Since there is provided a vibration reducing mechanism 70 that is loosely inserted with a clearance C3 that is narrower than the distance and that has a lower mechanical strength than the outer cylinder 70a, the lower frame 14 and the upper frame The outer cylinder 70a and the inner cylinder 70b collide violently when the relative movement amount of the frame 16 in the horizontal direction is moved by a clearance C3 which is narrower than the movement distance allowed by the upper frame movement amount restricting portion 18. This means that the outer cylinder 70a and the inner cylinder 70b constituting the seismic reduction mechanism 70 collide at a stage where the acceleration at the initial stage of movement is small. At that time, the inner cylinder 70b having a low mechanical strength is deformed or broken, so that the seismic energy in the horizontal direction is reduced at the initial stage of movement. As a result, the regulation bolt 52, after the inner cylinder 70b is deformed or broken, Even if horizontal seismic energy is applied to the lower frame 14 and the upper frame, the energy no longer remains to damage the regulating bolt 52, the lower frame 14 or the upper frame 16, and damage due to these earthquakes. Can be exempted. As long as the regulation bolt 52, the lower frame 14, and the upper frame 16 are protected from breakage, the vibration absorber 22 can be reliably prevented from being damaged.
本発明における第３の発明は、
（１）荷重担持面１２に設置される下枠１４と、搭載機器Ｍが載置される上枠１６と、前記下枠１４と前記上枠１６との間に配置される吸振体２２と、前記下枠１４に対して前記上枠１６の上下及び水平方向の移動量を規制する上枠移動量規制部１８とを具備する防振架台１０において、
（２）前記上枠移動量規制部１８が、
前記下枠１４又は前記上枠１６に設けられた規制ボルト５２と、
前記下枠１４又は前記上枠１６に形成され、前記規制ボルト５２が間隙ｄを持って挿通される挿通孔３３と、
前記下枠１４又は前記上枠１６の挿通孔３３を越えた規制ボルト５２の先端部分に螺着された上枠移動量規制ナット６０と、
前記規制ボルト５２の前記下枠１４と前記上枠１６との間のシャフト部分に前記下枠１４と前記上枠１６に対してクリアランスＣを持って保持され、規制ボルト５２、下枠１４及び上枠１６よりも機械的強度の小さい減震ワッシャ２０とで構成されており、
（３）前記吸振体２２が、
荷重担持用の圧縮コイルばね６６と、
前記圧縮コイルばね６６の下部に取り付けられる下部ケース６２と、
前記圧縮コイルばね６６の上部に取り付けられ、前記圧縮コイルばね６６の上面および側面を覆う上部ケース６４と、
前記圧縮コイルばね６６の内側に遊挿された外筒７０ａ、及び前記外筒７０ａの内面との間に前記上枠移動量規制部１８が許容する水平方向の移動距離よりも狭いクリアランスＣ３を持って遊挿され、前記外筒７０ａよりも機械的強度の小さい内筒７０ｂを備える減震機構７０とで構成されている
（４）ことを特徴とする防振架台１０である。
According to a third aspect of the present invention,
(1) a lower frame 14 installed on the load bearing surface 12, an upper frame 16 on which the mounting device M is placed, a vibration absorber 22 disposed between the lower frame 14 and the upper frame 16, In the anti-vibration mount 10 having the upper frame movement amount regulating unit 18 that regulates the movement amount of the upper frame 16 in the vertical and horizontal directions with respect to the lower frame 14;
(2) The upper frame movement amount regulating unit 18 is
A restriction bolt 52 provided on the lower frame 14 or the upper frame 16, and
An insertion hole 33 formed in the lower frame 14 or the upper frame 16 and through which the restriction bolt 52 is inserted with a gap d;
An upper frame movement amount regulating nut 60 screwed to the tip end portion of the regulating bolt 52 beyond the insertion hole 33 of the lower frame 14 or the upper frame 16;
A shaft portion between the lower frame 14 and the upper frame 16 of the restriction bolt 52 is held with a clearance C with respect to the lower frame 14 and the upper frame 16. It is composed of a vibration reducing washer 20 having a mechanical strength smaller than that of the frame 16,
(3) The vibration absorber 22 is
A compression coil spring 66 for carrying a load;
A lower case 62 attached to the lower portion of the compression coil spring 66;
An upper case 64 attached to an upper portion of the compression coil spring 66 and covering an upper surface and a side surface of the compression coil spring 66;
Between the outer cylinder 70a loosely inserted inside the compression coil spring 66 and the inner surface of the outer cylinder 70a, there is a clearance C3 that is narrower than the horizontal movement distance allowed by the upper frame movement amount restricting portion 18. The anti-vibration mount 10 is characterized in that the anti-vibration mount 10 is configured by the vibration-reducing mechanism 70 including the inner cylinder 70b that is loosely inserted and has a mechanical strength smaller than that of the outer cylinder 70a (4).
本発明の防振架台では、想定の範囲を超えるような巨大地震が発生した場合であっても、減震ワッシャ或いは減震機構の減震作用によって過大な振動エネルギーが防振架台の主要構成部材である上枠移動量規制部や吸振体に直接作用するのを防止して、これら上枠移動量規制部や吸振体を正常に機能させることができるようになる。 In the vibration isolator of the present invention, even if a huge earthquake exceeding the expected range occurs, excessive vibration energy is caused by the vibration reducing action of the vibration reducing washer or the vibration reducing mechanism. Thus, it is possible to prevent the upper frame movement amount restricting portion and the vibration absorber from acting directly and to allow the upper frame movement amount restricting portion and the vibration absorber to function normally.
つまり、本発明の防振架台によれば、部材の剛性や強度でもって地震に対抗する耐震構造のみならず、地震による衝撃力を減退・緩和させる減震技術を付加した防振架台を提供することができる。 In other words, according to the vibration isolator of the present invention, not only an earthquake resistant structure that resists earthquakes with the rigidity and strength of the members, but also a vibration isolator with an anti-vibration technology for reducing and mitigating the impact force caused by the earthquake is provided. be able to.
以下、本発明を図示実施例に従って説明する。図１は本発明の一実施例の防振架台１０の使用状態を示した正面図、図２は側面図、図３は底面図、図４は平面図である。これらの図が示すように、本実施例の防振架台１０は、空調室外機などの振動発生機器から発生する振動が基礎に伝わるのを防止するため、振動発生機器などの機器Ｍと荷重担持面１２との間に配設されるものであり、荷重担持面１２に設置される下枠１４と、機器Ｍが載置される上枠１６と、下枠１４と上枠１６とを近接離間可能なように連結する上枠移動量規制部１８と、上枠移動量規制部１８に取り付けられる減震ワッシャ２０と、下枠１４と上枠１６との間に配置される吸振体２２とで大略構成されている。 The present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a front view showing a use state of a vibration isolator 10 according to an embodiment of the present invention, FIG. 2 is a side view, FIG. 3 is a bottom view, and FIG. As shown in these drawings, the anti-vibration stand 10 of this embodiment is configured to support the load M and the device M such as the vibration generating device in order to prevent the vibration generated from the vibration generating device such as the air conditioner outdoor unit from being transmitted to the foundation. The lower frame 14 installed on the load carrying surface 12, the upper frame 16 on which the device M is placed, and the lower frame 14 and the upper frame 16 are closely spaced. An upper frame movement amount restricting portion 18 connected as possible, a vibration reducing washer 20 attached to the upper frame movement amount restricting portion 18, and a vibration absorber 22 disposed between the lower frame 14 and the upper frame 16. It is roughly structured.
下枠１４は、図３に示すように、断面略四角形の４本のパイプ状部材２４と、パイプ状部材２４同士をコーナー部で接合する４個のコーナー部材２６とによって、略四角形に構成されている。パイプ状部材２４の長さや太さは、上枠１６に載置・固定される機器Ｍの種類、形状または重量等に応じて適宜変更可能であり、この実施例では、対向する２本のパイプ状部材２４が、他の２本のパイプ状部材２４よりも長くかつ幅広に形成されている。 As shown in FIG. 3, the lower frame 14 is configured in a substantially rectangular shape by four pipe-shaped members 24 having a substantially square cross section and four corner members 26 that join the pipe-shaped members 24 at the corners. ing. The length and thickness of the pipe-shaped member 24 can be appropriately changed according to the type, shape, weight, etc. of the device M placed and fixed on the upper frame 16. In this embodiment, two pipes facing each other The member 24 is longer and wider than the other two pipe members 24.
各コーナー部材２６は、図３および図５(Ｂ)に示すように、一方のパイプ状部材２４の端部が接合される第１接合板部２８と、他方のパイプ状部材２４の端部が接合される第２接合板部３０と、第１接合板部２８および第２接合板部３０の上部においてこれらを連結する水平板部３２とを有しており、水平板部３２の中央部には、上枠移動量規制部１８を構成する下側挿通孔３４が形成されている。 As shown in FIGS. 3 and 5B, each corner member 26 has a first joining plate portion 28 to which the end of one pipe-like member 24 is joined, and an end of the other pipe-like member 24. It has the 2nd joining board part 30 joined, and the horizontal board part 32 which connects these in the upper part of the 1st joining board part 28 and the 2nd joining board part 30, and it has in the central part of the horizontal board part 32 Is formed with a lower insertion hole 34 which constitutes the upper frame movement amount regulating portion 18.
上枠１６は、図４に示すように、断面略四角形の４本のパイプ状部材３６と、パイプ状部材３６同士をコーナー部で接合する４個のコーナー部材３８とによって、略四角形に構成されている。パイプ状部材３６の長さや太さは、パイプ状部材２４と同様に、上枠１６に載置・固定される機器Ｍの種類、形状または重量等に応じて適宜変更可能であり、この実施例では、対向する２本のパイプ状部材３６が、他の２本のパイプ状部材３６よりも長くかつ幅広に形成されている。 As shown in FIG. 4, the upper frame 16 is formed in a substantially rectangular shape by four pipe members 36 having a substantially square cross section and four corner members 38 that join the pipe members 36 at corner portions. ing. The length and thickness of the pipe-shaped member 36 can be appropriately changed according to the type, shape, weight, etc. of the device M placed and fixed on the upper frame 16, similarly to the pipe-shaped member 24. Then, the two pipe-shaped members 36 facing each other are formed longer and wider than the other two pipe-shaped members 36.
各コーナー部材３８は、図４および図５（Ｂ）に示すように、一方のパイプ状部材３６の端部が接合される第１接合板部４０と、他方のパイプ状部材３６の端部が接合される第２接合板部４２と、第１接合板部４０および第２接合板部４２の下部においてこれらを連結する水平板部４４と、第１接合板部４０および第２接合板部４２の上部においてこれらを連結する補強板部４６とを有しており、水平板部４４の中央部には、上枠移動量規制部１８を構成する上側挿通孔４８が形成されている。 As shown in FIGS. 4 and 5B, each corner member 38 has a first joining plate portion 40 to which the end of one pipe-like member 36 is joined, and an end of the other pipe-like member 36. The second joining plate portion 42 to be joined, the horizontal joining portion 44 connecting them at the lower part of the first joining plate portion 40 and the second joining plate portion 42, the first joining plate portion 40 and the second joining plate portion 42. And an upper insertion hole 48 that forms the upper frame movement amount restricting portion 18 is formed in the central portion of the horizontal plate portion 44.
上枠移動量規制部１８は、図５に示すように、下枠１６に形成された下側挿通孔３４と、上枠１８に形成された上側挿通孔４８と、下側挿通孔３４および上側挿通孔４８を利用して装着される連結金具５０とで構成されている。 As shown in FIG. 5, the upper frame movement amount restricting portion 18 includes a lower insertion hole 34 formed in the lower frame 16, an upper insertion hole 48 formed in the upper frame 18, the lower insertion hole 34, and the upper insertion hole 34. It is comprised with the connection metal fitting 50 with which the insertion hole 48 is mounted | worn.
連結金具５０は、下側挿通孔３４と上側挿通孔４８とに挿通される規制ボルト５２を有しており、規制ボルト５２の根元部分の形状は、非円形にて形成された下側挿通孔３４にガタツキなく嵌合可能な多角形状に形成されている。なお、この規制ボルト５２としては汎用の角根ボルトをそのまま用いることができる。また、この規制ボルト５２はシャフト部分の先端側が挿通される上側挿通孔３３(後述する例では下側挿通孔４８；これらを総称する場合は単に「挿通孔３３」と云う)との間に間隙ｄが設けられている。 The connecting fitting 50 has a restriction bolt 52 that is inserted into the lower insertion hole 34 and the upper insertion hole 48, and the shape of the base portion of the restriction bolt 52 is a non-circular lower insertion hole. It is formed in a polygonal shape that can be fitted to 34 without rattling. As the restriction bolt 52, a general-purpose square root bolt can be used as it is. Further, the regulating bolt 52 has a gap between the upper insertion hole 33 (the lower insertion hole 48 in the example described later; simply referred to as the “insertion hole 33” when these are collectively referred to), through which the distal end side of the shaft portion is inserted. d is provided.
そして、規制ボルト５２の外周には、図５(Ｂ)に示すように、ワッシャ５４、固定ナット５６、２枚の減震ワッシャ２０、座金付ゴムブッシュ５８および上枠移動量規制ナット６０が規制ボルト５２の根元からこの順で装着されている。 Further, as shown in FIG. 5B, a washer 54, a fixing nut 56, two anti-vibration washers 20, a rubber bush 58 with a washer and an upper frame movement amount regulating nut 60 are regulated on the outer periphery of the regulating bolt 52. The bolts 52 are mounted in this order from the root.
ワッシャ５４および固定ナット５６は、ボルト頭部５２ａと協働して水平板部３２を挟むことによって、規制ボルト５２を下枠１６に固定するものである。規制ボルト５２の下枠１６に対する固定部においては、規制ボルト５２の非円形の根元部分が非円形の下側挿通孔３４に嵌合されるので、規制ボルト５２が振動等によって不所望に回転されることはなく、固定ナット５６の緩みが生じる心配はない。また、規制ボルト５２の根元部分は下側挿通孔３４の内面によって真直ぐに支持されるので、規制ボルト５２を上側挿通孔４８の中心部に傾くことなく真直ぐに通すことが可能であり、規制ボルト５２が上側挿通孔４８の内面に接して防振特性が損なわれるのを防止できる。 The washer 54 and the fixing nut 56 fix the regulating bolt 52 to the lower frame 16 by sandwiching the horizontal plate portion 32 in cooperation with the bolt head 52a. In the fixing portion of the restriction bolt 52 to the lower frame 16, the non-circular root portion of the restriction bolt 52 is fitted into the non-circular lower insertion hole 34. Therefore, the restriction bolt 52 is undesirably rotated by vibration or the like. There is no concern that the fixing nut 56 will loosen. Further, since the base portion of the restriction bolt 52 is supported straight by the inner surface of the lower insertion hole 34, the restriction bolt 52 can be passed straight without being inclined toward the center of the upper insertion hole 48. It is possible to prevent 52 from coming into contact with the inner surface of the upper insertion hole 48 and damaging the vibration isolation characteristics.
減震ワッシャ２０は、水平板部４４に設けられた上側挿通孔４８の底面との間に所定のクリアランスＣ１をもって取り付けられており、この減震ワッシャ２０が上側挿通孔４８の底面に当接することによって、上枠１８の下方向への振れを抑制すると共に、地震の際には上側挿通孔４８の底面に衝突して自らが変形或いは破損することで地震のエネルギーを減衰させる部材である。 The vibration reduction washer 20 is attached with a predetermined clearance C1 between the bottom surface of the upper insertion hole 48 provided in the horizontal plate portion 44, and the vibration reduction washer 20 is in contact with the bottom surface of the upper insertion hole 48. Thus, the upper frame 18 is prevented from swinging downward, and in the event of an earthquake, the member collides with the bottom surface of the upper insertion hole 48 and deforms or breaks itself, thereby attenuating the energy of the earthquake.
この減震ワッシャ２０は、例えばセラミックスやガラスなどの様にある一定以上の応力が加わると破壊されるクラッシャブルな材料や、変形し易い低降伏鋼或いはアルミ材等の金属材料などを用い、規制ボルト５２、下枠１４及び上枠１６よりも機械的強度が小さくなるように構成されており、その中央部には雌ネジが形成され、この雌ネジが規制ボルト５２の雄ネジに螺合されている。したがって、減震ワッシャ２０を回転させることによって、その高さを簡単に調整することが可能である。 This anti-seismic washer 20 is made of a crushable material such as ceramics or glass, which is destroyed when a certain level of stress is applied, or a metal material such as a low yield steel or aluminum material that is easily deformed. The bolt 52, the lower frame 14, and the upper frame 16 are configured to have a lower mechanical strength. A female screw is formed at the center of the bolt 52, and the female screw is screwed to the male screw of the regulating bolt 52. ing. Therefore, the height can be easily adjusted by rotating the vibration reducing washer 20.
なお、図１乃至図５に実施例では、上側挿通孔４８の底面との間に所定のクリアランスＣ１をもって上段の減震ワッシャ２０が取り付けられると共に、この上段の減震ワッシャ２０から所定のクリアランスＣ２をもって下段の減震ワッシャ２０が取り付けられている（これら間隔調節可能なクリアランスＣ１及びＣ２を総称する場合は単に「クリアランスＣ」と云う）。つまり、規制ボルト５２に上下２段の減震ワッシャ２０が取り付けられている場合を示しているが、規制ボルト５２に取り付ける減震ワッシャ２０の数は、上枠１６に載置・固定される機器Ｍの種類、形状または重量等に応じて適宜変更可能であり、１つでもよいし、３つ以上でもよい。 In the embodiment shown in FIGS. 1 to 5, the upper vibration reduction washer 20 is attached to the bottom surface of the upper insertion hole 48 with a predetermined clearance C1, and a predetermined clearance C2 is provided from the upper vibration reduction washer 20. A lower vibration reduction washer 20 is attached (the clearances C1 and C2 whose distances can be adjusted are collectively referred to as “clearance C”). That is, although the case where the upper and lower two-stage vibration reduction washers 20 are attached to the restriction bolts 52 is shown, the number of vibration reduction washers 20 attached to the restriction bolts 52 is a device that is placed and fixed on the upper frame 16. It can be appropriately changed according to the type, shape or weight of M, and may be one or three or more.
また、本実施例では、減震ワッシャ２０として、中央部に雌ネジが形成され、規制ボルト５２の雄ネジに螺合する構造のものを示しているが、この減震ワッシャ２０は、規制ボルト５２のシャフトの所定部分に保持できるものであれば、その構造は如何なるものであってもよく、例えば中心部にボルト挿通孔が穿設され、上下両面をナットで挟んで固定するような構造のものであってもよい。 In this embodiment, as the vibration reducing washer 20, a female screw is formed at the center and is screwed into the male screw of the restriction bolt 52. However, the vibration reducing washer 20 is a restriction bolt. Any structure can be used as long as it can be held on a predetermined portion of the shaft of 52. For example, a bolt insertion hole is formed in the center portion and the upper and lower surfaces are fixed with nuts between them. It may be a thing.
上枠移動量規制ナット６０は、規制ボルト５２から上枠１６が離脱するのを防止するとともに、上枠１６の上方向への振れを抑制するものであり、座金付ゴムブッシュ５８は、上枠１８の水平板部４４と上枠移動量規制ナット６０との間において緩衝材として機能するものである。座金付ゴムブッシュ５８は、座金部５８ａの下面にゴム部５８ｂを取り付けた構造を有しており、座金部５８ａによってゴム部５８ｂの撓みが抑制され、上枠１８の上方向への振れが抑制される。 The upper frame movement amount regulating nut 60 prevents the upper frame 16 from detaching from the regulating bolt 52 and suppresses upward deflection of the upper frame 16. It functions as a cushioning material between the 18 horizontal plate portions 44 and the upper frame movement amount regulating nut 60. The rubber bush 58 with a washer has a structure in which a rubber part 58b is attached to the lower surface of the washer part 58a, and the bending of the rubber part 58b is suppressed by the washer part 58a, and the upward deflection of the upper frame 18 is suppressed. Is done.
吸振体２２は、振動発生機器から上枠１６に伝わった振動や基礎から下枠１４に伝わった外乱などを吸収する機能を有するものであり、図６に示すように、下枠１４におけるパイプ状部材２４の上部に嵌着される下部ケース６２と、上枠１６におけるパイプ状部材３６の下部を支持する上部ケース６４と、下端が下部ケース６２に固定され、かつ、上端が上部ケース６４に固定された圧縮コイルばね６６と、圧縮コイルばね６６に接触する粘弾性片を有するサージング防止部材６８と、後述する減震機構７０とで構成されている。そして、本実施例では、下枠１４の長辺を構成するパイプ状部材２４と上枠１６の長辺を構成するパイプ状部材３６との間に、合計４個の防振部材２２が配置されている。 The vibration absorber 22 has a function of absorbing vibrations transmitted from the vibration generating device to the upper frame 16, disturbances transmitted from the foundation to the lower frame 14, and the like, as shown in FIG. A lower case 62 fitted to the upper part of the member 24, an upper case 64 supporting the lower part of the pipe-shaped member 36 in the upper frame 16, a lower end fixed to the lower case 62, and an upper end fixed to the upper case 64 The compression coil spring 66, a surging preventing member 68 having a viscoelastic piece in contact with the compression coil spring 66, and an anti-vibration mechanism 70 described later. In the present embodiment, a total of four vibration isolation members 22 are arranged between the pipe-like member 24 constituting the long side of the lower frame 14 and the pipe-like member 36 constituting the long side of the upper frame 16. ing.
減震機構７０は、下端が下部ケース６２に固定され圧縮コイルばね６６の内側に遊挿される外筒７０ａと、上端が上部ケース６４に固定され外筒７０ａの内面との間に上枠移動量規制部１８が許容する水平方向の移動距離よりも狭い所定のクリアランスＣ３を持って遊挿され、外筒７０ａよりも機械的強度の小さい内筒７０ｂとで構成されており、地震の際には外筒７０ａと内筒７０ｂとが衝突してこれらが変形或いは破損することで地震のエネルギーを減衰させる部材である。このように自らが変形或いは破損することによって地震のエネルギーを減衰させる内筒７０ｂは、上述した減震ワッシャ２０と同様に、例えばセラミックスやガラスなどの様にある一定以上の応力が加わると破壊されるクラッシャブルな材料や、変形し易い低降伏鋼或いはアルミ材等の金属材料などで構成されている。 The vibration reducing mechanism 70 has an upper frame moving amount between an outer cylinder 70a whose lower end is fixed to the lower case 62 and loosely inserted inside the compression coil spring 66, and an upper end fixed to the upper case 64 and the inner surface of the outer cylinder 70a. The inner cylinder 70b is loosely inserted with a predetermined clearance C3 narrower than the horizontal movement distance allowed by the restricting portion 18 and has a mechanical strength smaller than that of the outer cylinder 70a. The outer cylinder 70a and the inner cylinder 70b collide with each other and are deformed or damaged to attenuate earthquake energy. The inner cylinder 70b that attenuates the energy of the earthquake by being deformed or damaged as described above is destroyed when a certain level of stress such as ceramics or glass is applied, as in the case of the vibration reducing washer 20 described above. Or a metal material such as an easily deformable low yield steel or aluminum material.
なお、この実施例では、外筒７０ａの下端が下部ケース６２に固定され、内筒７０ｂの上端が上部ケース６４に固定される場合を示したが、この外筒７０ａと内筒７０ｂの天地を入れ替えるようにしてもよい。 In this embodiment, the case where the lower end of the outer cylinder 70a is fixed to the lower case 62 and the upper end of the inner cylinder 70b is fixed to the upper case 64 is shown. However, the top and bottom of the outer cylinder 70a and the inner cylinder 70b are used. You may make it replace.
以上のように構成された防振架台１０を使用する際には、図1及び２に示すように、下枠１４が荷重担持面１２にアンカーボルト等によって固定され、上枠１６の上面に振動発生機器などの機器Ｍが載置され、この機器Ｍがボルト等によって上枠１６に固定される。そして、吸振体２２の振動吸収機能を有効に発揮させるために、減震ワッシャ２０及び上枠移動量規制ナット６０の高さが調整される。つまり、図５に示すように、上枠１６の水平板部４４の底面と上段の減震ワッシャ２０との間に所定のクリアランスＣ１(一例を挙げると、厚さ２ｍｍの減震ワッシャ２０を用いた場合に２ｍｍ程度のクリアランスＣ１を設ける)が確保される。また、上段と下段の減震ワッシャ２０の間にも上記クリアランスＣ１と同程度のクリアランスＣ２を設けるようにする。 When the vibration isolator 10 constructed as described above is used, as shown in FIGS. 1 and 2, the lower frame 14 is fixed to the load carrying surface 12 by anchor bolts or the like, and the upper frame 16 is vibrated on the upper surface. A device M such as a generating device is placed, and the device M is fixed to the upper frame 16 with a bolt or the like. And in order to exhibit the vibration absorption function of the vibration absorber 22 effectively, the height of the vibration reducing washer 20 and the upper frame movement amount regulating nut 60 is adjusted. That is, as shown in FIG. 5, a predetermined clearance C1 (for example, a 2 mm thick vibration reducing washer 20 is used between the bottom surface of the horizontal plate portion 44 of the upper frame 16 and the upper vibration reducing washer 20 is used. A clearance C1 of about 2 mm is provided). Further, a clearance C2 of the same degree as the clearance C1 is also provided between the upper and lower vibration reduction washers 20.
以上のようにクリアランスＣが確保された防振架台１０において、通常時には、振動発生機器が発する振動や基礎からの外乱などは吸振体２２によって吸収され防振機能が発揮されている。そして巨大な地震等によって上枠１６に載置された機器Ｍが過剰に振動すると、上述したように減震ワッシャ２０や減震機構７０が破損或いは変形することで地震の振動エネルギーが減衰され、上枠移動量規制部１８や吸振体２２が損傷するのを防止することができる。 As described above, in the vibration isolator 10 in which the clearance C is ensured, the vibration generated by the vibration generating device and the disturbance from the foundation are absorbed by the vibration absorber 22 and the vibration isolating function is exhibited. When the device M placed on the upper frame 16 vibrates excessively due to a huge earthquake or the like, the vibration energy of the earthquake is attenuated by breaking or deforming the vibration reducing washer 20 or the vibration reducing mechanism 70 as described above. It is possible to prevent the upper frame movement amount restricting portion 18 and the vibration absorber 22 from being damaged.
なお、上述の実施例では、規制ボルト５２を下枠１４の水平板部３２に固定する例を示しているが、図７に示すように、規制ボルト５２を上枠１６の水平板部４４に固定してもよい。この場合には、上枠１６の上側挿通孔４８が規制ボルト５２の根元部に嵌合することになると共に、減震ワッシャ２０と下側挿通孔３４の天面との間に所定のクリアランスＣ１を設けることになる。 In the above-described embodiment, an example is shown in which the regulating bolt 52 is fixed to the horizontal plate portion 32 of the lower frame 14, but the regulating bolt 52 is attached to the horizontal plate portion 44 of the upper frame 16 as shown in FIG. It may be fixed. In this case, the upper insertion hole 48 of the upper frame 16 is fitted to the base portion of the restriction bolt 52, and a predetermined clearance C1 is provided between the vibration reducing washer 20 and the top surface of the lower insertion hole 34. Will be provided.
また、減震ワッシャ２０と減震機構７０とを同時に用いる場合を示しているが、想定する地震の規模などに応じて、減震ワッシャ２０又は減震機構７０のいずれか一方を備えるようにしてもよい。 Moreover, although the case where the vibration reduction washer 20 and the vibration reduction mechanism 70 are used simultaneously is shown, either the vibration reduction washer 20 or the vibration reduction mechanism 70 is provided according to the magnitude of the assumed earthquake. Also good.
１０…防振架台
１２…荷重担持面
１４…下枠
１６…上枠
１８…上枠移動量規制部
２０…減震ワッシャ
２２…吸振体
２４，３６…パイプ状部材
２６，３８…コーナー部材
３２，４４…水平板部
３３…挿通孔
３４…下側挿通孔
４６…補強板材
４８…上側挿通孔
５０…連結金具
５２…規制ボルト
５６…固定ナット
５８…座金付ゴムブッシュ
６０…上枠移動量規制ナット
６２…下部ケース
６４…上部ケース
６６…圧縮コイルばね
６８…サージング防止部材
７０…減震機構
７０ａ…外筒
７０ｂ…内筒
Ｍ…機器
DESCRIPTION OF SYMBOLS 10 ... Anti-vibration stand 12 ... Load carrying surface 14 ... Lower frame 16 ... Upper frame 18 ... Upper frame movement amount control part 20 ... Anti-vibration washer 22 ... Damping body 24, 36 ... Pipe-shaped member 26, 38 ... Corner member 32, 44 ... Horizontal plate portion 33 ... Insertion hole 34 ... Lower insertion hole 46 ... Reinforcing plate material 48 ... Upper insertion hole 50 ... Connecting bracket 52 ... Restriction bolt 56 ... Fixed nut 58 ... Rubber bush 60 with washer 60 ... Upper frame movement amount restriction nut 62 ... Lower case 64 ... Upper case 66 ... Compression coil spring 68 ... Surging prevention member 70 ... Anti-vibration mechanism 70a ... Outer cylinder 70b ... Inner cylinder M ... Equipment
Claims (3)
前記上枠移動量規制部が、
前記下枠又は前記上枠に設けられた規制ボルトと、
前記下枠又は前記上枠に形成され、前記規制ボルトが間隙を持って挿通される挿通孔と、
前記下枠又は前記上枠の挿通孔を越えた規制ボルトの先端部分に螺着された上枠移動量規制ナットと、
前記規制ボルトの前記下枠と前記上枠との間のシャフト部分に前記下枠と前記上枠に対してクリアランスを持って保持され、規制ボルト、下枠及び上枠よりも機械的強度の小さい減震ワッシャとで構成されていることを特徴とする防振架台。 A lower frame installed on the load bearing surface, an upper frame on which the mounted device is placed, a vibration absorber disposed between the lower frame and the upper frame, and the upper frame with respect to the lower frame. In the anti-vibration stand having the upper frame movement amount regulating unit for regulating the movement amount in the vertical and horizontal directions,
The upper frame movement amount regulating unit is
Restriction bolts provided on the lower frame or the upper frame;
An insertion hole formed in the lower frame or the upper frame, through which the restriction bolt is inserted with a gap;
An upper frame movement amount regulating nut screwed to a tip end portion of a regulating bolt beyond the insertion hole of the lower frame or the upper frame;
A shaft portion between the lower frame and the upper frame of the restriction bolt is held with a clearance with respect to the lower frame and the upper frame, and has a lower mechanical strength than the restriction bolt, the lower frame, and the upper frame. An anti-vibration stand that is composed of an anti-seismic washer.
前記吸振体が、
荷重担持用の圧縮コイルばねと、
前記圧縮コイルばねの下部に取り付けられる下部ケースと、
前記圧縮コイルばねの上部に取り付けられ、前記圧縮コイルばねの上面および側面を覆う上部ケースと、
前記圧縮コイルばねの内側に遊挿された外筒、及び前記外筒の内面との間に前記上枠移動量規制部が許容する水平方向の移動距離よりも狭いクリアランスを持って遊挿され、前記外筒よりも機械的強度の小さい内筒を備える減震機構とで構成されていることを特徴とする防振架台。 A lower frame installed on the load bearing surface, an upper frame on which the mounted device is placed, a vibration absorber disposed between the lower frame and the upper frame, and the upper frame with respect to the lower frame. In the anti-vibration stand having the upper frame movement amount regulating unit for regulating the movement amount in the vertical and horizontal directions,
The vibration absorber is
A compression coil spring for carrying a load;
A lower case attached to a lower portion of the compression coil spring;
An upper case attached to an upper portion of the compression coil spring and covering an upper surface and a side surface of the compression coil spring;
Between the outer cylinder loosely inserted inside the compression coil spring and the inner surface of the outer cylinder, it is loosely inserted with a clearance smaller than the horizontal movement distance allowed by the upper frame movement amount restricting portion, An anti-vibration stand comprising an anti-vibration mechanism including an inner cylinder having a mechanical strength smaller than that of the outer cylinder.
前記上枠移動量規制部が、
前記下枠又は前記上枠に設けられた規制ボルトと、
前記下枠又は前記上枠に形成され、前記規制ボルトが間隙を持って挿通される挿通孔と、
前記下枠又は前記上枠の挿通孔を越えた規制ボルトの先端部分に螺着された上枠移動量規制ナットと、
前記規制ボルトの前記下枠と前記上枠との間のシャフト部分に前記下枠と前記上枠に対してクリアランスを持って保持され、規制ボルト、下枠及び上枠よりも機械的強度の小さい減震ワッシャとで構成されており、
前記吸振体が、
荷重担持用の圧縮コイルばねと、
前記圧縮コイルばねの下部に取り付けられる下部ケースと、
前記圧縮コイルばねの上部に取り付けられ、前記圧縮コイルばねの上面および側面を覆う上部ケースと、
前記圧縮コイルばねの内側に遊挿された外筒、及び前記外筒の内面との間に前記上枠移動量規制部が許容する水平方向の移動距離よりも狭いクリアランスを持って遊挿され、前記外筒よりも機械的強度の小さい内筒を備える減震機構とで構成されていることを特徴とする防振架台。 A lower frame installed on the load bearing surface, an upper frame on which the mounted device is placed, a vibration absorber disposed between the lower frame and the upper frame, and the upper frame with respect to the lower frame. In the anti-vibration stand having the upper frame movement amount regulating unit for regulating the movement amount in the vertical and horizontal directions,
The upper frame movement amount regulating unit is
Restriction bolts provided on the lower frame or the upper frame;
An insertion hole formed in the lower frame or the upper frame, through which the restriction bolt is inserted with a gap;
An upper frame movement amount regulating nut screwed to a tip end portion of a regulating bolt beyond the insertion hole of the lower frame or the upper frame;
A shaft portion between the lower frame and the upper frame of the restriction bolt is held with a clearance with respect to the lower frame and the upper frame, and has a lower mechanical strength than the restriction bolt, the lower frame, and the upper frame. It consists of a vibration reducing washer,
The vibration absorber is
A compression coil spring for carrying a load;
A lower case attached to a lower portion of the compression coil spring;
An upper case attached to an upper portion of the compression coil spring and covering an upper surface and a side surface of the compression coil spring;
Between the outer cylinder loosely inserted inside the compression coil spring and the inner surface of the outer cylinder, it is loosely inserted with a clearance smaller than the horizontal movement distance allowed by the upper frame movement amount restricting portion, An anti-vibration stand comprising an anti-vibration mechanism including an inner cylinder having a mechanical strength smaller than that of the outer cylinder.
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| JP2015075228A (en) * | 2013-10-11 | 2015-04-20 | 特許機器株式会社 | Vibration damping stopper structure, clearance management spacer, and vibration control trestle |
| WO2018233215A1 (en) * | 2017-06-22 | 2018-12-27 | 中车大连机车车辆有限公司 | Adjusting device and method for vibration isolator of locomotive diesel generator set |
| CN109252254A (en) * | 2018-11-09 | 2019-01-22 | 山东华兴纺织集团有限公司 | For being spaced the isolating device of carding machine rear car tripe suction pipe and cotton feeder motor cabinet |
| CN110056746A (en) * | 2019-03-29 | 2019-07-26 | 浙江大学滨海产业技术研究院 | A kind of device that multistage can slow down shield machine vibration |
| CN110631138A (en) * | 2019-09-25 | 2019-12-31 | 芜湖美智空调设备有限公司 | Vibration reduction assembly of air conditioner and air conditioner with same |
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| US11009063B2 (en) | 2018-12-12 | 2021-05-18 | Roller Bearing Company Of America, Inc. | Spherical plain bearing for dampers |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2015075228A (en) * | 2013-10-11 | 2015-04-20 | 特許機器株式会社 | Vibration damping stopper structure, clearance management spacer, and vibration control trestle |
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| CN110631138A (en) * | 2019-09-25 | 2019-12-31 | 芜湖美智空调设备有限公司 | Vibration reduction assembly of air conditioner and air conditioner with same |
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