JP2000346126A - Ball type base isolation base - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the handling of a base isolation base in a ball type base isolation base having balls interposed between the upper and lower bases in such a manner as to be capable of rolling by providing a lifting allowing means for lifting upper and lower bases together on the lower surface of the lower base. SOLUTION: In the application to the base isolation base for a showcase used in a museum, an upper bracket plate 10 and a lower bracket plate 11 are fixed to the lower surface of an upper base 3 and the upper surface of a lower base 4 by screwing, respectively, and stopper plates 14, 15 are arranged between the support plate 6 of the upper base 3 and the upper bracket plate 10 and between the support plate 7 of the lower base 4 and the lower bracket plate 11, respectively. A major diameter cylinder 16 provided on the upper stopper plate 14 protrusively downward is slidably fitted to a minor diameter cylinder 17 provided on the lower stopper plate 15 protrusively upward, and a screw passed through the upper stopper plate 13 is screwed into the lower stopper plate 15, whereby a connecting means for retaining the upper and lower bases 3, 4 in the vertically inseparable state so as to be horizontally relatively movable as a lifting allowing means is constituted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to various fixtures and devices such as cabinets and display cases (display cases),
It relates to a ball-type seismic isolation table used for equipment and the like.

[0002]

2. Description of the Related Art A seismic isolation table using a ball to move the upper and lower bases relative to each other in the horizontal direction has no directivity of relative movement between the upper and lower bases.
There is an advantage that it can cope with shaking in any direction. However, since the conventional ball-type seismic isolation table is merely a configuration in which a ball is interposed between the upper and lower bases (for example, see
However, there was a problem that the seismic isolation table was separated apart when the upper base was lifted.

[0003] In particular, in the case of a small seismic isolation table that can be carried by hand, the lower base has no clue for grasping by hand, so that the upper base is often grasped and lifted. Accidents tended to separate the whole. In addition, when carrying a conventional seismic isolation table by hand, it is necessary to lift it with your hand on the lower surface of the lower base. When dropping the seismic isolation table or lowering it on the floor, there was a problem that it was easy to get injured by putting a finger between the lower base and the floor.

[0004] The present invention aims to improve this situation.

[0005]

SUMMARY OF THE INVENTION The present invention is directed to a ball-type seismic isolation table in which a ball that allows the upper and lower bases to move relative to each other in an arbitrary horizontal direction is rotatably interposed between the upper and lower bases. And a lifting permitting means for lifting the upper and lower bases together without touching the lower surface of the lower base.

The specific mode of the lifting permitting means can be variously developed. In the seismic isolation table according to the second aspect of the present invention, the lifting permitting means comprises a connecting means which holds the upper and lower bases so as to be relatively movable in the horizontal direction in a state where the upper and lower bases cannot be separated, and lifts the upper base by hand. Thus, the upper and lower bases can be carried together.

The lifting permitting means in the seismic isolation table of the invention according to claim 4 comprises a handle formed separately from the upper and lower bases, and an engaging portion provided on the lower base. An engaging portion is formed so that when the handle is engaged from the outside with the engaging portion of the lower base, the handle is held so as to protrude outside the lower base.

[0008]

[Function / Effect] In any configuration of claims, it is not necessary to lift the hand by touching the lower surface of the lower base as in the related art, and the upper base is directly grasped or the handle is grasped to seize the base. Can be lifted. Therefore, the seismic isolation table can be lifted in a comfortable posture,
It becomes possible to grasp the upper base or the handle firmly,
As a result, when carrying the seismic isolation table manually, the burden on the worker can be reduced, and the work can be performed more safely and easily than before.

[0009] By the way, if the shaking of the earthquake is large, there is a possibility that the upper base is disengaged from the lower base and the object to be seized falls. In this regard, with the configuration according to the second aspect, since the upper and lower bases are held in an inseparable state by the connecting means, it is possible to prevent the upper base from being disengaged from the lower base and to prevent the seismic isolated object from falling. There is an advantage that can be suppressed.

Further, according to the third aspect of the present invention, the frictional plate provided on the connecting means can provide resistance to the relative movement of the upper and lower bases. At the same time, it is possible to prevent easy movement with a light force, prevent resonance of the upper and lower bases during an earthquake, and effectively attenuate shaking after the earthquake has ended. In addition, according to the third aspect, even if a force that causes the upper and lower bases to relatively horizontally turn due to the shaking of the earthquake acts, the presence of the friction plate makes it possible to relatively horizontally turn the upper and lower bases in plan view. By being suppressed, the horizontal turning of the retainer is also suppressed, so that it is possible to prevent the upper and lower bases from relatively turning horizontally in a plan view and thereby deteriorating the stability of the base-isolated object. .

[0011] On the other hand, when the lifting permitting means is configured as in claim 4, it is not necessary for the operator to take a leaning posture, and it is possible to grasp the handle more firmly. The connection means is not necessarily required, so it can be easily applied to the conventional seismic isolation table.If the connection means is provided, no load is applied to the connection means when carrying it. There is a specific effect that deformation of the member can be prevented.

[0012]

Next, embodiments of the present invention will be described with reference to the drawings.

{First Embodiment} FIGS. 1 to 9 show a first embodiment.
3 show a first embodiment corresponding to FIGS. 1 to 3, wherein FIG. 1 is a perspective view showing a use state, FIG. 2 is a separated front view, and FIG.
FIG. 4 is a plan view as viewed from IV-IV of FIG. 2, FIG. 5 is a plan view as viewed from VV of FIG. 2, FIG. 6 is a bottom view as viewed from VI-VI of FIG. 2, and FIG. 8A is a sectional view taken along line AA of FIG. 7, FIG. 8B is a sectional view taken along line BB of FIG. 7, and FIG.
It is the elements on larger scale of (B).

FIG. 1 shows a case in which the present invention is applied to a display case 1 used in, for example, a museum or a museum as a seismic isolated object. The display case 1 is divided into four seismic bases 2 arranged at four corners thereof. I support it. The base isolation table 2 is formed in a rectangular shape (square) in plan view. Hereinafter, the details will be described.

[0015] As shown in the separation view of FIG.
An upper base 3 fixed to the seismic isolated object 1, a lower base 4 mounted or fixed on the floor surface, and four balls 5 arranged between the upper and lower bases 3, 4 are provided. The upper and lower bases 3 and 4 are formed in a rectangular shape in a plan view, and have base frames 3 'and 4' which open in opposite directions. 7 are provided integrally. As shown in FIG. 3, a concave plate 8 having a lower surface formed by a gentle curve is fixed to each of the upper base 3 near the four corners of the support plate 6.

Needless to say, the seismic isolation is achieved by reciprocally moving the upper and lower bases 3 and 4 in the horizontal direction by utilizing the fact that the ball 5 returns to the center of the concave plate 8 and is freely used. . In addition, the concave plate 8 may be provided on the support plate 7 of the lower base 4. The concave portion of each concave plate 8 is the ball 5
The range of movement.

An upper bracket plate 10 is provided on the lower surface of the upper base 3.
The lower bracket plate 11 is fixed to the upper surface of the lower base 4 by screwing or the like. The upper and lower bracket plates 10 and 11 have their feet 12 formed on the four sides screwed to the support plates 6 and 7, respectively.
There is a gap between the support plate 1 and the support plates 6 and 7 of the bases 3 and 4, and a circular through hole 13 is provided in the bracket plates 10 and 11.

The support plate 6 of the upper base 3 and the upper bracket plate 1
0, a disc-shaped upper stopper plate 14 is arranged, and a disc-shaped lower stopper plate 15 is arranged between the support plate 7 of the lower base 4 and the lower bracket plate 11. ,
A large-diameter cylinder 16 projecting downward from the upper stopper plate 14 and a small-diameter cylinder 17 projecting upward from the lower stopper plate 15 are slidably fitted together, and a screw 18 penetrated through the upper stopper plate 14 is further lowered. It is screwed into the stopper plate 15.

The upper and lower stopper plates 14, 15 are set to have a larger diameter than the through holes 13 of the upper and lower bracket plates 10, 11, so that the upper and lower bases 3, 4 are held inseparably. The upper and lower stopper plate 1 is designated by reference numeral 9 shown in FIG.
4 and 15 show the maximum movement ranges. As is clear from this figure, in order to allow the upper and lower stopper plates 14 and 15 to move greatly, the non-support area where the ball 5 does not move is widely spread inside the area surrounded by the four concave plates 8. .

The upper and lower bracket plates 10, 11, the stopper plates 14, 15, the cylindrical bodies 16, 17 and the screws 18 constitute the connecting means according to the second and third aspects. The through-hole 13 of the upper and lower bracket plates 10 and 11 and the large-diameter cylinder 16 are set so that the upper large-diameter cylinder contacts the inner surface of the through-hole 13 when the upper and lower bases 3 and 4 move relative to each other at the maximum. Therefore, the relative movement of the upper and lower bases 3 and 4 is allowed during the earthquake. Conversely, the large-diameter cylinder 16 and the upper and lower bracket plates 10 and 11 have a function as a restricting means for restricting the maximum relative stroke of the upper and lower bases 3 and 4.

A friction plate 19 is fixed to the upper surface of the upper stopper plate 14 and the lower surface of the lower stopper plate 15, respectively, and a spring 20 is disposed in the cylinders 16 and 17. As shown in the enlarged view of FIG. 9, a small gap is set between the head of the screw 18 and the upper stopper plate 14, so that the upper and lower friction plates 19 are
Respectively, and abut against the support plates 6 and 7 of the bases 3 and 4, respectively. A relief hole 21 is provided in the center of the upper and lower friction plates 19 to allow the screw 18 to be inserted.

4 is provided between the upper and lower bracket plates 10 and 11.
A plate-like retainer 22 for synchronously moving the balls 5 is disposed, and the retainer 22 has a large-diameter cylinder 1.
6 is provided with a hole 23 to be fitted in a state where it is hardly displaced.
Therefore, the upper and lower stopper plates 14, 15 and the friction plate 19 and the retainer 22 move integrally. Tube 16 and retainer 2
2 is fitted so as to be movable up and down relatively. This is to allow the cylinder 16 to move up and down due to the relative movement of the upper and lower bases 3 and 4 when the ball 5 is in contact with the concave plate 8.

The base frame 3 'of the upper base 3 is slightly larger than the base frame 4' of the lower base 4. As described above, since the upper and lower stopper plates 14 and 15 are undetachably held between the bases 3 and 4 and the upper and lower bracket plates 10 and 11, respectively, for example, the base frame 3 'in the upper base 3 By putting a finger on the opening edge 3a of
The seismic isolation table 2 can be lifted as a whole and safely carried in a stable state.

{Second Embodiment} FIGS. 10 and 11 show a second embodiment. That is, FIG. 10 is a cross-sectional view similar to FIG. 9 borrowed from the second embodiment and viewed from the XX direction (different from FIG. 9 itself).
In this embodiment, the large and small cylinders 16 and 17 are each formed in a rectangular shape, and the hole 23 of the retainer 22 is formed in a rectangular shape so that the large and small cylinders 16 and 17 and the retainer 22 do not relatively rotate horizontally. The other configuration is the same as that of the first embodiment.

Since the rolling friction between the ball 5 and the upper and lower bases 3 and 4 is small, the attitude of the retainer 22 and the upper and lower bases 4 changes greatly, and the position of the ball 5 at each concave plate 8 is changed. It may be different, the stability of the seismic isolated object 1 may be degraded, and it may be easy to fall. But,
According to the configuration of the second embodiment, it is possible to prevent the retainer 22 from turning horizontally with respect to the upper and lower bases 3 and 4, thereby improving the stability of the seismic isolated object 1.

That is, in the configuration as shown in FIG. 10, since the upper and lower friction plates 19 cannot relatively rotate horizontally, even if a force which causes the upper and lower bases 3 and 4 to horizontally rotate due to the shaking of the earthquake acts. By the upper and lower friction plates 19, the relative horizontal turning of the upper and lower bases 3, 4 can be suppressed,
In addition, since the retainer 22 and the upper and lower friction plates 19 are integrally held in the posture in plan view, the retainer 22 is less likely to turn horizontally with respect to the upper and lower bases 3 and 4, and as a result, The seismic isolation can be prevented from becoming unstable, and the seismic isolation can be accurately performed as shown in FIG. Note that the cylinders 16 and 17 are not limited to square shapes, but may be non-circular.

{Third embodiment} Upper and lower stopper plates 14,
As means for maintaining the flat posture of the friction plate 15 and the friction plate 19 and the retainer 22, as shown in FIG.
2 may be provided with a notch groove 25 into which the blade 24 is slidably fitted. This is a kind of key engagement.
In the case of a circular cylinder and a small-diameter cylinder (not shown), they may be held non-rotatably by key engagement.

Fourth Embodiment In a fourth embodiment shown in FIG. 13, a large-diameter cylinder 16 is attached to a retainer 22 by welding or the like, and a small-diameter cylinder provided on upper and lower stopper plates 14 and 15 is attached to the large-diameter cylinder 16. The tube 17 is inserted. Also in this case, it is preferable that the cross-sectional shape of each of the cylindrical bodies 16 and 17 is formed to be non-circular. A shaft may be used instead of the small diameter cylinder.

Fifth Embodiment FIGS. 14 to 24 show a fifth embodiment according to the fourth aspect. 14 is a front view showing a use state, FIG. 15 is a separated front view of the seismic isolation table 2, FIG. 16 (A) is a bottom view taken along the line AA of FIG. 15, and FIG. FIG. 17 is a plan view of FIG.
XVII-XVII plan view, FIG. 18 is a partially enlarged view of FIG. 17,
19A is a partial sectional view of the seismic isolation table viewed from the AA direction in FIG. 17, and FIG. 19B is a view of the seismic isolation table viewed from the BB direction in FIG. Partial sectional view, FIG.
7 and FIGS. 21 and 22 are diagrams showing the operation.

The seismic isolation table 2 of this embodiment is basically the same as that of the first embodiment, and includes upper and lower base frames 3 ', 4', four balls 5, a lower support plate 7, and upper and lower brackets. Boards 10, 11
, Upper and lower stopper plates 14 and 15 provided with friction plates 19 and cylinders 16 and 17, screws 18, springs 20, and retainers 22. The two cylinders 16 and 17 have a rectangular cross section, and have the same structure as that of the second embodiment. In the present embodiment, each member is essentially the same as the first embodiment except that the upper support plate 6 is not provided, and thus a detailed description is omitted.

Although the connecting means is also provided in this embodiment,
Unlike the first embodiment, the present embodiment does not aim to make the connecting means function as the lifting permitting means.

A mounting plate 28 such as a metal plate or a plywood is fixed to the upper support plate 6, and the display case 1 is fixed to this.
In this embodiment, one display case 1 is placed on one seismic isolation table 2. As shown in FIG. 14, a lighting device 29 for illumination is provided in the display case 1, and a power cord 30 a for the lighting device 29 is drawn downward through the inside of the support 31. A decorative cloth may be provided on the outer peripheral surfaces of the upper and lower base frames 3 'and 4' (and on the upper surface of the mounting plate 28).

As shown in FIGS. 17 and 18, a pair of engaging holes 32 are formed at the center of each piece of paper in the peripheral portion of the lower support plate 7 as an example of the engaging portion described in the claims. ing. The engagement hole 32 is formed in a keyhole shape in which a large-diameter portion 32a located closer to the center of the support plate 6 and a narrow groove 32b closer to the outside communicate with each other. Further, a stopper hole 33 is formed in a portion between the two engagement holes 32.

FIG. 20 shows the handle 27, and (A)
Is a plan view of the handle 27, (B) is a cross-sectional view taken along line BB of (A), and (C) is a cross-sectional view taken along line CC of (A). Toride 27
Is made of a metal plate, and a mushroom-shaped projection 34 that fits into the engagement hole 32 of the lower base 4 is fixed to the lower surface of the portion near the tip as an example of a locking portion. The head of the projection 34 is slightly smaller in diameter than the large diameter portion 32a of the engagement hole 32 and has a narrow groove portion 32b.
And the axis of the projection 34 is
The outer diameter is set to fit the narrow groove 32b.

Therefore, the projection 34 is connected to the large diameter portion 3 of the engagement hole 32.
2a, pull the handle 27 outward to narrow the groove 32b.
The handle 27 can be held in a state in which the handle 27 cannot be removed and cannot rotate upward. Since there is a step between the opening edge 4a of the lower base frame 4 'and the lower support plate 7, the handle 27
It is bent in a stepped manner so that the portion near the front end where the protrusion 34 is provided is at the lower level.

As shown in FIG. 22 (A), the handle 27 is set up so as to hit the upper base frame 3 'in a state where the protrusion 34 is fitted into the engagement hole 32 and the handle 27 is lifted. This is to prevent the upper base 3 from shifting.

A downward claw 35 is cut and raised at a position between the left and right protrusions 34 of the leading edge of the handle 27, and the handle 27 is lifted with the protrusions 34 fitted in the narrow grooves 32 b of the engagement holes 32. And the nail 3 as shown in FIG.
The handle 5 is fitted into the stopper hole 33, and the handle 27 is held so as not to be displaced back and forth.

As can be easily understood from the above description, the projection 34 of the handle 27 is engaged with the engagement hole 32 at two opposing sides (or three or more sides) of the lower base 4.
23, the seismic isolation table 2 can be lifted via the plurality of handles 27 as shown in FIG. In this case, it is not necessary for the worker to take a leaning posture, and the handle 27 is easy to grasp, so that the seismic isolation table 2 can be carried safely and easily.

The handle 27 can be attached to and detached from the lower base 4 while the upper base 3 is displaced as shown in FIG. 21, so that the attachment and detachment of the handle 27 is easy, and Opening edges 3a of base frames 3 ', 4',
The gap between 4a can be made as small as possible. If there is a sufficient space between the opening edges 3a, 4a of the upper and lower base frames 3 ', 4', the upper base 3 may be removed and inserted from between the opening edges 3a, 4a without shifting. It is possible.

When the claw 35 and the stopper hole 33 are provided as in the embodiment, the projection 34 of the handle 27 can be
Does not come out of the engagement hole 32 of the lower base 4, so that it is safer. In this case, as the stopper means for maintaining the engagement state between the engaging portion of the handle 27 and the engaging portion of the lower base 4, other engaging means other than the claw 35 and the stopper hole 33 may be used. In order to make the handle 27 easier to grasp,
The grip 27 can be formed by hollowing out the handle 27 or the handle 2
The outer edge of 7 may be bent downward.

{Processing of Power Supply Cord} By the way, the power supply cord in the display case 1 is drawn into the space between the upper and lower bases 3 and 4 from an outlet or the like provided in a building, and is drawn into the display case 1 through the upper base 3. Will be.
In this case, in the related art, in order to allow relative movement between the upper and lower bases 3 and 4, the cord is laid in a space between the upper and lower bases 3 and 4 in a state of being slackened. There is a risk that the seismic isolation function may be impaired by being caught or entangled in the cable, or the cord may be disconnected and short-circuited.
To prevent this, a special wiring space must be provided, which complicates the structure of the seismic isolation table.

In this embodiment, as shown in FIGS. 19 (B) and 24, a magnet-type outlet 36 is fixed to the upper base 3 with screws, and while the inner cord 30a is pulled upward from the outlet 36, A magnet-type plug 37 is attached to one end of the external cord 30b connected to a building outlet (not shown), and the magnet-type plug 37 is attracted to the magnet-type outlet 36 by magnetic force.

According to this example, even if the lower base 3 is not provided with a wiring portion (cord pool) for the cord, if the upper and lower bases 3 and 4 move relative to each other due to the earthquake and tension is applied to the external cord 30b, the magnet type plug is provided. Since the 37 is removed from the outlet 36, the external cord 30b is not entangled or disconnected with other members, and is safe. Also,
If the display case 1 falls down while the power supply to the lamp 29 and the like is suspended, there is a risk of electric leakage, but the plug 37 can be automatically removed from the socket 36 due to the shaking of the earthquake.
The danger of electric leakage can be prevented, and this aspect is safe.

When the external cord 30b is fixed to the lower base 4, the plug 3 must be
6 may be set so as to be disconnected from the outlet 37.

In the above embodiment, the outlet 36 and the plug 37 are provided inside the upper base 3.
As shown in FIG. 5 as a sixth embodiment, a magnet-type outlet 36 may be attached to the upper base 3 such that the connection surface thereof is exposed to the outside, and a magnet-type plug 37 may be connected thereto. As shown in FIG. 26 as a seventh embodiment, a magnetic outlet 36 provided in the upper base 3 and the lower base 4 is provided with a magnetic plug 37 at both ends.
With a short intermediate cord 30c connected to the lower base 4
The external cord 3
The normal plug 38 connected to the connector 0b may be freely connected and detached. In this example, at the time of an earthquake, one of the upper and lower magnetic plugs 37 is disconnected from the outlet 36.

In the case of FIG. 26, the magnet-type plug 37 is connected to only one end of the
The other end of Oc may be directly connected to the outlet 36.
Since the lower base 4 moves together with the floor, no tension is applied to the external cord 30b in this case, and therefore, there is no problem even if the ordinary plug 38 is used.

<< Other Embodiments >> FIGS. 27 to 30 show another embodiment of the fourth aspect. Of these, the eighth shown in FIG.
In the embodiment, an engagement hole 32 is provided in the foot piece 12 of the lower bracket plate 11 so that the locking portion 27a of the handle 27 can be inserted into the engagement hole 32 and lifted. In this case, the locking portion 27a
The lower support plate 7 is provided with a spacer piece 40 to which the distal end of the handle 27 abuts.

In the ninth embodiment shown in FIG. 28, an engaging hole 32 is formed in the side plate of the lower base frame 4 ', and the bar-shaped locking portion 27a of the handle 27 is inserted into this. Also in this example, a spacer piece 40 and a claw 39 are provided. In the tenth embodiment shown in FIG. 29, the upper base 3 is lifted by the handle 27. The handle 27 has a hook portion 27b abutting on the inner surface of the lower base frame 4 'and an outer portion of the upper base frame 3'. A stopper 27c abutting on the side surface is provided. Needless to say, in this example, the upper and lower bases 3 and 4 need to be connected inseparably by connecting means. In the eleventh embodiment shown in FIG. 30, the handle 27 is provided with a grip 27d to facilitate gripping.

{Other} The present invention is applicable not only to display cases but also to seismic isolation of various other objects. When a friction plate is provided as in the first and fifth embodiments, a friction plate may be provided on the base, or a friction plate may be provided on both the stopper plate and the base. It goes without saying that the connecting means can adopt a structure other than that of the embodiment.

In the fourth aspect, the specific shape of the handle and the specific examples of the engaging portion and the locking portion are not limited to the embodiments, but can be embodied in various modes. By modifying the shape of the handle without special processing as the engaging portion, for example, the fifth
It is also possible to utilize a part of the member such as the lower bracket plate of the embodiment for the engaging portion.

It should be noted that the configurations disclosed in the present specification and drawings all include a superordinate concept (in order to avoid complexity of description, there are many parts that are not intentionally described in the superordinate concept). The term "engaging means" is used to refer to the locking portion,
Correcting the handle to an expression based on the upper concept, as in other words, "handle means", is guaranteed. Thus, for example, the means for preventing horizontal rotation of the retainer may be claimed independently of the lift permitting means.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a use state.

FIG. 2 is an isolated front view of the base isolation table.

FIG. 3 is a bottom view taken along the line III-III of FIG. 2;

FIG. 4 is a plan view taken along line IV-IV of FIG. 2;

FIG. 5 is a plan view taken along the line VV of FIG. 2;

FIG. 6 is a bottom view taken along the line VI-VI of FIG. 2;

FIG. 7 is a partially broken plan view of the base isolation table.

8A is a sectional view taken along the line AA in FIG. 7, and FIG.
FIG.

FIG. 9 is a partially enlarged view of FIG.

10 is a view showing the second embodiment, and is a view similar to the sectional view taken along the line XX in FIG. 9.

FIG. 11 is an explanatory diagram of the second embodiment.

FIG. 12 is a diagram illustrating a third embodiment.

FIG. 13 is a diagram showing a fourth embodiment.

FIG. 14 is a front view illustrating a use state of the fifth embodiment.

FIG. 15 is an isolated front view of a base isolation table 2 according to a fifth embodiment.

16 (A) is a bottom view as viewed along AA in FIG. 15, and FIG. 16 (B) is a plan view as viewed along BB in FIG. 15.

FIG. 17 is a plan view taken along the line XVII-XVII of FIG. 15;

18 is a partially enlarged view of FIG.

19A is a partial sectional view of the seismic isolation table viewed from the AA direction in FIG. 17, and FIG. 19B is a view of the seismic isolation table viewed from the BB direction in FIG. It is a partial sectional view.

FIG. 20 is an explanatory diagram of a handle.

FIG. 21 is a diagram showing an operation.

FIG. 22 is a diagram showing an operation.

FIG. 23 is a diagram showing a portable state.

FIG. 24 is a partially enlarged view of FIG. 19;

FIG. 25 is a diagram showing a sixth embodiment.

FIG. 26 is a diagram illustrating a seventh embodiment;

FIG. 27 is a diagram illustrating an eighth embodiment.

FIG. 28 is a diagram illustrating a ninth embodiment.

FIG. 29 is a diagram showing a tenth embodiment.

FIG. 30 is a diagram illustrating an eleventh embodiment.

[Explanation of symbols]

 2 Seismic isolation table 3 Upper base 4 Lower base 5 Ball 6,7 Support plate 8 Concave plate 10,11 Bracket plate 13 Through-hole of bracket plate 14,15 Stopper plate 16,17 Tube forming a connecting part 18 Constituting part Screw 19 friction plate 20 spring 22 retainer 32 engagement hole as an example of an engagement portion 33 stopper hole 34 projection as an example of an engagement portion 35 claw for preventing disengagement

Continued on the front page (72) Inventor Fumio Tanaka 1-4-1 Imafukuhigashi, Joto-ku, Osaka City F-term in Itoki Crebio Co., Ltd. 3J048 AA05 BC02 BG02 CB07 DA03 EA13

Claims (4)

[Claims] A ball which allows the upper and lower bases to move relative to each other in an arbitrary horizontal direction is rotatably interposed between the upper and lower bases, and furthermore, the upper and lower bases are placed without touching the lower surface of the lower base. A ball type seismic isolation table characterized by comprising lifting means for lifting together. The lifting permitting means comprises a connecting means which holds the upper and lower bases so as to be movable relative to each other in the horizontal direction in a state where the upper and lower bases cannot be separated from each other. The ball-type seismic isolation table according to claim 1, wherein the ball-type seismic isolation table can be carried together. 3. The upper and lower bases are formed in a rectangular shape in a plan view, and four balls are provided between the upper and lower bases.
A retainer for moving these four balls together is arranged, and the retainer and the connecting means are fitted so as to be relatively non-rotatable in a plan view. The ball-type seismic isolation table according to claim 2, further comprising a friction plate that elastically slides. 4. The lifting permitting means comprises a handle formed separately from the upper and lower bases, and an engaging portion provided on the lower base. The ball-type seismic isolation table according to claim 1, wherein a locking portion is formed so that when the handle is engaged with the handle, the handle is held so as to protrude outside the lower base.