JP2004003538A - Vibration absorbing base - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration absorbing base capable of protecting devices from vibration having small amplitude and preventing it from falling down due to excessive moving of the devices while ensuring safety and vibration absorption property of the devices. <P>SOLUTION: A plurality of balls 8 held by a retainer 6 are arranged between upper and lower bases 2 and 3. A laminated elastic body 9 giving resistance to their relative movement is fixed to the upper and lower bases 2, 3. A baseboard 17 provided with a flange 17a is fixed on the lower base 3, and a coping 12 surrounding the flange 17a of the baseboard 17 is provided on the upper base 2. Stroke of the upper and lower bases 2, 3 is regulated by the coping 12 and the baseboard 17. Moreover, it is possible to lift the vibration absorbing base 1 by applying a hand to the coping 12. Furthermore, entry of dust is prevented by the presence of the coping 12. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vibration absorber used when installing devices and articles that are vulnerable to vibration in a place where vibration is severe.
[0002]
[Prior art]
There are a large number of devices, facilities, and articles, such as electronic devices such as computers and servers, that do not function properly or are prone to failure when vibrations act thereon. On the other hand, there are environments exposed to vibrations such as vibrations of minute amplitude constantly occurring like ships and railway vehicles, and occasional vibrations like factories equipped with overhead cranes.
[0003]
Conventionally, when installing devices and articles that are vulnerable to vibration in an environment where vibrations are generated, rubber feet (anti-vibration rubber) are provided on the lower surface of the devices and articles to absorb the vibration. Was common.
[0004]
On the other hand, many seismic isolation structures and bases have been proposed for absorbing the shaking of an earthquake to protect buildings, equipment, and articles. In the case of a base-isolated structure, an elastic support system that supports the building with rubber, a rolling bearing system in which the foundation and the building move relative to each other via steel balls, or a block that can move horizontally between the foundation and the building Positioned sliding bearing systems have been proposed. In the case of a portable seismic isolation table, a rolling bearing structure using steel balls or rollers between upper and lower bases is often used.
[0005]
[Problems to be solved by the invention]
When rubber feet are provided as vibration damping means for devices / articles, if soft materials are used to improve the vibration absorption function, the devices / articles may be tilted, while devices / articles may be tilted. If a hard material is used so as to be able to support the device without tilting, there is a problem that the stable support of devices and articles and the vibration absorbing function are contradictory such that the vibration absorbing function is reduced.
[0006]
In this regard, it is conceivable to use the seismic isolation table as a mounting table with a vibration absorbing function as it is, and in this case, it is considered that the stability and vibration absorbing function of the devices and articles can be secured.
[0007]
However, the seismic isolation table was originally designed to absorb the shaking of the earthquake, and the upper and lower bases are relatively large and move relative to each other. (There is a stroke of about 400 to 450 mm so that it can be absorbed.) For this reason, if the installation location has a slight inclination, or if it is installed on a moving object such as a ship or a vehicle, the upper and lower bases move relatively relative to each other. There is a possibility that it will not be useful.
[0008]
On the other hand, as a seismic isolation structure of a building, it has been proposed to provide a rubber restoring means that provides resistance to the relative movement between the building and the foundation, in addition to the rolling bearing using a ball. It is also conceivable to divert it to a vibration absorbing table for articles.
[0009]
However, also in this case, since the restoration means is deformed so large that it can absorb the large shaking of the earthquake, the upper and lower bases may be excessively large, for example, when a large inertial force acts on the devices and articles for some reason. There is a risk of relative movement, and it is hard to say that it is perfect.
[0010]
The present invention has been made in view of the current situation as described above, and a vibration absorbing table which does not overturn devices and articles due to abnormal external force while securing the stability and vibration absorbing function of the devices and articles. And the like.
[0011]
[Means for Solving the Problems]
The present invention relates to an upper base on which devices and articles are placed, a lower base disposed below the upper base, and a rigid body disposed between the upper and lower bases to allow the upper and lower bases to relatively move in the horizontal direction. And a resistance applying means for applying resistance to the relative movement of the upper and lower bases so that the upper and lower bases return to the basic position even if they move relative to each other.
[0012]
The invention of claim 1 is characterized in that the upper and lower bases are provided with stopper means for restricting relative movement of the upper and lower bases only at an amplitude much smaller than the maximum amplitude of the earthquake.
[0013]
According to the invention of claim 2, the upper base is formed in a size larger than the lower base, and a baseboard that protrudes upward is provided on a peripheral edge of the lower base. The overhanging flange is formed.
[0014]
On the other hand, on the periphery of the upper base, a coping extending substantially over the entire circumference so as to surround the baseboard of the lower base from the outside is provided, and the coping of the upper base and the baseboard of the lower base constitute the stopper means. The upper base is provided with an inward portion which goes under the flange of the lower base, so that when the upper base is lifted, the lower base is lifted together. The cap may be referred to as a gusset or an upper end member.
[0015]
According to a third aspect of the present invention, in the first or second aspect, the upper and lower bases are formed in a quadrangular shape in a plan view, and the bearing means is a metal ball, and is held by a retainer at a constant relative position. The four balls are respectively arranged at the corners of the upper and lower bases.
[0016]
On the other hand, the resistance applying means is a laminated elastic body obtained by laminating a plurality of soft bodies such as rubber, and a plurality of the laminated elastic bodies are arranged near four sides of the upper and lower bases and between adjacent balls. Each laminated elastic body has one of upper and lower ends fixed to a bracket, and the bracket is fixed to one of the upper and lower bases. Is regulated to the maximum relative movement.
[0017]
[Action and Effect of the Invention]
According to the present invention, since the bearing means is made of a rigid body, devices and articles can be held in a stable posture. Further, the relative movement of the upper and lower bases via the support means and the resistance applied to the relative movement of the upper and lower bases by the resistance applying means can significantly suppress the vibration of the lower base from acting on the upper base.
[0018]
Then, even if an external force that causes the upper and lower bases to move relative to each other is applied for some reason, the upper and lower bases are excessively moved relative to each other because the maximum relative movement stroke is restricted to a small dimension by the stopper means. Devices and articles do not fall. Further, the resistance applying means such as the laminated elastic body is not damaged.
[0019]
Therefore, the vibration-absorbing table of the present invention can effectively suppress the vibration of the installation location from spreading to the devices and articles, and at the same time, has the function of suppressing the posture stability and the displacement of the devices and articles, and the reliability. Excellent in nature.
[0020]
If dust enters between the upper and lower bases, the smoothness of the relative movement between the support means and the base (particularly, the lower base) may be impaired, and the vibration absorbing function may be reduced. Since the lower base is covered by the upper base cap, dust can be prevented or significantly suppressed from entering between the upper and lower bases, and the vibration absorbing function can be maintained.
[0021]
In addition, since the relative movement stroke of the upper and lower bases can be regulated by using a cap having a dust intrusion prevention function, the stroke can be regulated without complicating the structure.
[0022]
By the way, in the seismic isolation table, the upper and lower bases are set to the same size in plan view, and the upper base greatly overhangs from the lower base, so the method of hooking the upper base on the lower base cannot be adopted. In order to lift the seismic isolation table as a whole, it is necessary to mount a hand or hook on the lower base and lift the base, or to provide a connecting device that allows the relative movement between the upper and lower bases so that they cannot be separated.
[0023]
However, the lower base is generally difficult to lift because there is no clue to handle it, and the provision of the connecting device between the upper and lower bases leads to a complicated structure.
[0024]
On the other hand, according to the second aspect of the present invention, the lower base can be hooked on the upper base by using a coping that also functions as dust prevention and stroke regulation, without complicating the structure. You can carry the vibration-absorbing table simply by hanging your hand on the upper base and lifting.
[0025]
When a ball is used as the bearing means as in claim 3, the responsiveness of the relative movement of the upper and lower bases is high, so that the vibration absorbing function can be further improved. Further, since a laminated elastic body is used as the resistance applying means, a commercially available isolator can be used as it is, which can contribute to cost reduction.
[0026]
In addition, since the stroke of the upper and lower bases can be regulated by applying a bracket for fixing the laminated elastic body to the retainer, there is an advantage that the stroke can be regulated without complicating the structure. In addition, there is a possibility that the laminated elastic body that the retainer collides with the laminated elastic body may be damaged. However, the presence of the bracket can prevent the retainer from colliding with the laminated elastic body.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings.
[0028]
(1). First Embodiment (FIGS. 1 to 13)
1 to 13 show a first embodiment. FIG. 1A is a schematic perspective view showing an example of a use state, FIG. 1B is a cross-sectional view taken along the line BB of FIG. 1A, and the upper base 2 and the lower base 3 are arranged as shown in FIG. The rack 4 is fixed on the upper surface of the vibration absorber 1 having a rectangular shape in plan view, and devices 5 such as servers are fixed to the rack 4.
[0029]
The rack 4 has a quadrangular frame structure in plan view, includes a pair of left and right feet 4 a, and fixes the feet 4 a to the upper base 2 with screws. The devices 6 may be directly fixed to the upper base 2 without using the rack 4. Next, the details of the vibration absorbing table 1 will be described with reference to FIGS.
[0030]
▲ 1 ▼. Overview (Figs. 2 to 4)
First, an outline will be described with reference to FIGS. 2 is an exploded perspective view of the vibration-absorbing table 1, FIG. 3 is a partially cutaway plan view, FIG. 4A is a sectional view taken along line AA of FIG. 3, and FIG. 4B is a sectional view taken along line BB of FIG. FIG.
[0031]
The vibration absorbing table 1 includes the above-described upper and lower bases 2 and 3, a retainer 6 disposed between the upper and lower bases 2 and 3, four steel balls 8 attached to the retainer 6 via a holder 7, And a body 9. The ball 8 may be made of a synthetic resin.
[0032]
The upper base 2 includes a main plate 10 such as aluminum or plywood, and a cover plate 11 made of a steel plate fixed to an upper surface of the main plate 10. A downward facing skirt 12 is formed by bending around four sides of the cover plate 11, and further, an inward portion 12 a is formed by bending at a lower end of the skirt 12. The tip of the inward portion 12a stands up.
[0033]
A square or circular hole 13 is formed in the upper base 2 near the corner of the main plate 10, and the ball receiving plate 14 is screwed into the lower surface of the main plate 10 at a position of each hole 13 so as to close the hole 13. It is fixed. The ball receiving plate 14 is made of a hard and rust-resistant material such as stainless steel, and has a concave lower surface. For this reason, the ball 8 moves to the center of the receiving plate 14 and becomes selfish.
[0034]
Note that the cover plate 11 does not need to cover the entire surface of the main plate 10, and may have a rectangular frame structure in plan view and overlap only with the peripheral edge of the main plate 10. Further, the main plate 10 can be directly applied to the ball 8.
[0035]
The lower base 3 is fixed to a thick substrate 15 made of a material such as a plywood or an aluminum plate, a support plate 16 made of a steel plate fixed to the upper surface of the substrate 15, and a countersunk screw to the lower surface of the four peripheral portions of the substrate 16. A baseboard 17 is provided. The lower base 3 is set to be slightly smaller than the upper base 2, the baseboard 17 protrudes upward, and a flange 17 a that projects outward is bent at the upper end.
[0036]
The baseboard 17 is divided for each side of the lower base 3. The inward portion 12a of the coping 12 in the upper base 2 is located below the flange 17a of the baseboard 17 in the lower base 3. In this case, in a basic state in which the upper and lower bases 2 and 3 are concentrically arranged, a distance E1 between the cap 12 and the flange 17a and a distance between the inward portion 12a of the cap 12 and the rising portion of the baseboard 17 are set. The spacing dimension E2 is set to be the same dimension.
[0037]
▲ 2 ▼. Ball holding mechanism (Figs. 5 to 7)
Next, a holding mechanism of the ball 8 will be described with reference to FIGS. 5 is a plan view of a main part, FIG. 6 is a separated one side view of the main part, and FIG. 7 is a separated perspective view of the main part.
[0038]
The retainer 6 includes a plate-shaped main body 19 with four corners cut, and the balls 8 are held at the cut four corners of the main body 19 via a pair of ball holders 7.
[0039]
The holder 7 is made of a synthetic resin having a small coefficient of friction, and has a concave portion 20 at the tip end thereof into which the ball 8 is partially fitted. The recess 20 has a plurality of flat surfaces so as to make point contact with the ball 8 at a plurality of points.
[0040]
In the cut portion of the main body 19, a notch 21 is formed in which the rear half of both holders 7 are fitted. On the outer surfaces of both holders 7, a notch 21 is fitted to the left and right side edges of the notch 21. A mating groove 22 is formed. Further, spring receiving holes 24 into which the compression coil springs 23 are fitted are formed on the opposite surfaces of the rear portions of the left and right holders 7.
[0041]
A semicircular fulcrum 19a is formed in a plan view at the tip of the left and right inner edge of the notch 21 in the main body 19, while the front end of the fitting groove 22 in both holders 7 is a fulcrum 19a. An arc portion 22a is formed so as to fit tightly.
[0042]
As can be easily understood from the drawing, the ball 8 is held in the holder 7 without play by the action of the spring 23. The spring 23 is set to an appropriate spring force that allows the ball 8 to roll.
[0043]
(3). As shown in FIG. 8, the laminated elastic body 9 has a structure in which a plurality of elastic plates are laminated and integrally fixed with an adhesive or the like. It is fixed integrally by the like. On the other hand, a lower plate 26 is fixed to the lower surface of the laminated elastic body 9.
[0044]
As shown in FIG. 4, the bracket 25 is fastened to the main plate 10 of the upper base 2 with screws 27, and the lower plate 26 is fastened to the support plate 16 of the lower base 3 with screws 28. The main plate 10 of the lower base 3 is provided with an escape hole 29 into which the screw 28 enters. The bracket 25 is arranged such that the vertical portion 25 a is located on the side of the retainer 6.
[0045]
Then, in a basic state where the upper and lower bases 2 and 3 are concentrically arranged, the interval dimension E3 between the vertical portion 25a of the bracket 25 and the retainer 6 is equal to that of the coping 12 of the upper base 2 and the baseboard 17 of the lower base 3. Are set to half of the interval dimensions E1 and E2.
[0046]
In the present embodiment, the vibration-absorbing table 1 is intended to protect the device 5 from small-amplitude vibrations such as fine vibrations (high-frequency vibrations) caused by a diesel engine. That is, the spacing dimensions E1 and E2 between the coping 12 of the upper base 2 and the baseboard 17 of the lower base 3 may be small, for example, about 5 to 10 mm.
[0047]
▲ 4 ▼. Assembling and Carrying As specifically shown in FIG. 9, the baseboard 17 is separated at each of the four sides of the lower base 3, and its end is cut at an angle of 45 degrees. For this reason, the end faces of the adjacent baseboards 17 can be exactly butted against each other.
[0048]
Then, assembling of the vibration absorbing table 1, as shown in FIG. 10, first, the laminated elastic body 9 is fixed to the upper base 2 with screws 27, and then the retainer 6 is disposed between the upper and lower bases 2, 3. Then, the lower base 3 and the laminated elastic body 9 are fastened to each other. Finally, each baseboard 17 is fixed to the support plate 16 of the lower base 3 with a countersunk screw 30.
[0049]
Since the baseboard 17 is separated for each side of the lower base 3, the flange 17 a can be made to enter the inside of the inward portion 12 a of the upper base 2 in an inclined posture as shown in FIG. 10.
[0050]
Since the inward portion 12a of the coping 12 in the upper base 2 enters below the flange 17a in the lower base 3, as shown in FIG. 11, when the upper base 2 is lifted, the entire vibration absorbing table 1 can be lifted.
[0051]
In this case, since the inward portion 12a of the lower base 3 is located above the lower base 3, it is difficult for a person to insert a finger below the inward portion 12a with the vibration absorbing table 1 on the floor, for example. Therefore, the vibration absorbing table 1 can be easily and safely lifted and installed. Further, since the laminated elastic body 9 extends in the up-down direction, the laminated elastic body 9 is not broken by lifting.
[0052]
Since the coping 12 of the upper base 2 is bent inward, the rigidity as a whole is extremely high due to the rib effect. Therefore, there is no deformation due to the lifting.
[0053]
▲ 5 ▼. Since the upper and lower bases 2 and 3 are supported by rigid balls 8, there is no problem that the devices 5 are inclined, and the upper and lower bases 2 and 3 move relative to each other and the laminated elastic body 9 is elastic. Due to the deformation, transmission of vibration at the installation location to the upper base 2 and the devices 5 is cut off or significantly suppressed.
[0054]
Since the vibration-absorbing table 1 according to the present embodiment is assumed to be a vibration countermeasure product having a very small amplitude, even if vibration is applied to the installation location, generally, the upper and lower bases 2 and 3 can move relative to each other with very small dimensions. However, the upper and lower bases 2 and 3 may move relative to each other for some reason such as a person accidentally kicking the upper base 2.
[0055]
Then, as shown in FIG. 12, the relative movement of the upper and lower bases 2 and 3 is restricted by the hitting of the coping 12 of the upper base 2 and the baseboard 17 of the lower base 3. Therefore, the upper and lower bases 2, 3 do not move relative to each other excessively, and the device 5 does not fall over. Further, when a plurality of devices 5 are installed, the group of the devices 5 can be arranged in a state where the interval is narrowed. .
[0056]
Since the ball 8 is interposed between the upper and lower bases 2 and 3, the upper and lower bases 2 and 3 move by twice the moving distance of the ball 8 and the retainer 6. In other words, it moves only half the relative movement distance between the retainer 6 and the upper and lower bases 2 and 3.
[0057]
Accordingly, the distance E3 between the vertical portion 25a of the bracket 25 and the retainer 6 is set to a half of the distance E1, E2 between the coping 12 of the upper base 2 and the baseboard 17 of the lower base 3. As a result, the stroke regulation by the copings 12 and the baseboard 17 and the stroke regulation by the bracket 25 and the retainer 6 are simultaneously performed. As a result, the impact is reduced to prevent deformation and breakage of the member. Can be.
[0058]
In the case of FIG. 12, the retainer 6 and the bracket 25 are in contact with the right part not shown in the figure, and therefore, there is an advantage that the movement of the upper and lower bases 2 and 3 can be stopped smoothly.
[0059]
When the upper and lower bases 2 and 3 are completely moved to the opposite side to the solid line state in FIG. 12, the laminated elastic body 9 is deformed as shown by a dashed line in FIG. 12, and in this state, the vertical piece 25a of the bracket 25 and the retainer 6 corresponds to the main body 19. For this reason, it can prevent that the retainer 6 collides with the laminated elastic body 9 and the laminated elastic body 9 is damaged. That is, the bracket 25 has a function of protecting the laminated elastic body 9.
[0060]
In addition, if a soft plate such as a rubber plate is attached to one or both of the inner surface of the cap 12 and the outer surface of the baseboard 17, there is an advantage that the impact can be reduced.
[0061]
The upper and lower bases 2 and 3 not only move relative to each other in a straight line in plan view but also relatively rotate horizontally. In this case as well, as shown in FIG. 13, the relative horizontal turning stroke of the upper and lower bases 2 and 3 is regulated by the contact between the caps 12 of the upper base 2 and the flange 17 a of the lower base 3.
[0062]
By the way, it is conceivable that the resistance applying means such as the laminated elastic body 9 is arranged at the center of the upper and lower bases 2 and 3, but by merely arranging at the center, the relative movement of the upper and lower bases 2 and 3 is effectively suppressed. It is not possible (particularly, couple force for horizontally turning the upper and lower bases 2 and 3 can hardly be suppressed).
[0063]
On the other hand, when the laminated elastic body 9 is arranged as far as possible from the outside and at substantially equal intervals in the circumferential direction as in the present embodiment, the resistance balance is improved, and the laminated elastic body 9 is compact. However, vibration can be effectively absorbed. Needless to say, an optimal combination may be set for the arrangement location and number of the laminated elastic bodies 9 or the strength of the resistance according to the size of the vibration absorbing table 1 and the magnitude of vibration at the installation location.
[0064]
(2). Other Embodiments (FIGS. 14 to 16)
14 to 16 show another embodiment.
[0065]
In the second embodiment shown in FIG. 14, the laminated elastic body 9 is formed in a columnar shape, and when formed in this manner, the laminated elastic body 9 is elastically deformed to the same degree against external force from any direction. Since a restoring force is generated, there is an advantage that vibration can be accurately absorbed regardless of the direction of penetration. The same effect can be obtained even if the laminated elastic body 9 is formed in a cylindrical shape.
[0066]
In the third embodiment shown in FIG. 15 (support means is omitted), the inward flange 17b of the baseboard 17 provided on the lower base 3 is arranged outside the coping 12 on the upper base 2, and the coping 12 Is provided with an outward facing portion 12b. Also in this case, the entire vibration absorbing table 1 can be lifted by hanging a hand (or a hook) on the upper base 2.
[0067]
In this embodiment, a coil spring 31 is used as the resistance applying means, and the coil spring 31 is tightly fitted to a rod 32 provided on the upper and lower bases 2 and 3. An adjuster 33 is provided on the lower base 3. Other forms of springs, such as leaf springs and wire springs, can be used instead of coil springs.
[0068]
FIG. 16 shows a second embodiment which is another example of a use state, and shows a state in which one device 5 is supported by four vibration absorbing tables 1. By supporting with a plurality of vibration-absorbing tables 1 in this manner, one kind of vibration-absorbing tables 1 can be used for devices and articles of various sizes.
[0069]
(3). Others The present invention can be embodied in various ways other than the above-described embodiment. For example, the support means is not limited to a ball, and for example, a roller (roller) may be used. When the action direction of the vibration is constant, it can be said that the rollers are suitable.
[0070]
Further, the resistance applying means is not limited to using a laminated elastic body or a spring, but may use an elastic body having a single structure as a whole, or may use different kinds of elastic means together.
[Brief description of the drawings]
FIG. 1 is a diagram showing a first embodiment, in which (A) is a perspective view in a use state, and (B) is a cross-sectional view taken along BB of (A).
FIG. 2 is an exploded perspective view.
FIG. 3 is a partially broken plan view.
4A is a sectional view taken along line AA of FIG. 3, and FIG. 4B is a sectional view taken along line BB of FIG.
FIG. 5 is a plan view showing a ball holding mechanism.
FIG. 6 is an exploded plan view showing a ball holding mechanism.
FIG. 7 is an exploded perspective view showing a ball holding mechanism.
FIG. 8 is a perspective view of a laminated elastic body.
FIG. 9 is a partial plan view of a baseboard.
FIG. 10 is a cross-sectional view showing a state during assembly.
FIG. 11 is a cross-sectional view of a state where the vibration absorbing table is lifted.
FIG. 12 is a diagram illustrating a state in which stroke regulation is performed.
FIG. 13 is a view showing a restricted state of horizontal turning.
FIG. 14 is a diagram showing a second embodiment.
FIG. 15 is a diagram showing a third embodiment.
FIG. 16 is a diagram showing a fourth embodiment.
[Brief description of reference numerals]
DESCRIPTION OF SYMBOLS 1 Vibration-absorbing table 2 Upper base 3 Lower base 4 Rack 5 Device 6 Retainer 7 Holder 8 Ball 9 Laminated elastic body 12 as an example of resistance applying means 12 Kasagi 12a Inward facing 17 Baseboard 17a Flange

Claims (3)

An upper base on which devices and articles are mounted, a lower base disposed below the upper base, and a rigid bearing means disposed between the upper and lower bases to allow the upper and lower bases to relatively move in the horizontal direction. And a resistance applying means for applying resistance to the relative movement of the upper and lower bases so that the upper and lower bases return to the basic position and become self-reliant even if they move relative to each other,
The upper and lower bases are provided with stopper means for regulating such that the upper and lower bases can relatively move only at an amplitude much smaller than the maximum amplitude of the earthquake,
Vibration absorber for placing articles. The upper base is formed in a size larger than the lower base, and a baseboard that protrudes upward is provided on a peripheral edge of the lower base, and a flange that projects outward is formed at an upper end of the baseboard. While
On the periphery of the upper base, a coping extending substantially over the entire circumference so as to surround the lower base's baseboard from the outside is provided, and the upper base's coping and the lower base's baseboard are used as the stopper means,
Furthermore, by providing an inward portion that goes under the flange of the lower base on the cap of the upper base, when the upper base is lifted, the lower base is also lifted together.
The vibration absorbing table according to claim 1. The upper and lower bases are formed in a square shape in plan view,
The bearing means is a metal ball, and four balls held in a fixed relative position by a retainer are respectively arranged at the corners of the upper and lower bases,
The resistance imparting means is a laminated elastic body obtained by laminating a plurality of soft bodies such as rubber, and a plurality of laminated elastic bodies are arranged near the four sides of the upper and lower bases and between adjacent balls, One of the upper and lower ends of each laminated elastic body is fixed to a bracket, and the bracket is fixed to one of the upper and lower bases. When the bracket comes into contact with the retainer, the maximum of the upper and lower bases is also reduced. Relative movement is regulated,
The vibration absorbing table according to claim 1 or 2.

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