JP2954882B2 - Seismic isolation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation device for protecting a mounted object by absorbing vibration energy such as an earthquake.
In particular, the present invention relates to a seismic isolation device suitable for protecting exhibits such as art, antiques, and precision instruments in museums and museums.

[0002]

2. Description of the Related Art Exhibits exhibited in art museums and museums are often culturally and valuable in terms of price. From the viewpoint of protecting them, they are usually displayed in display cases. You. Although the display case can avoid problems such as collapse caused by direct contact by the visitor, collapse is likely to occur when vibration energy such as an earthquake acts.
Seismic isolation devices are used to prevent this.

As this type of seismic isolation device, as disclosed in, for example, Japanese Utility Model Laid-Open No. 4-13846, a base installed on a floor or the like and a state in which the base is superimposed on the upper surface of the base. A movable table having a mounting surface provided thereon, and an energy cut-off means for guiding the movement of the movable table when an external force such as vibration energy acts to absorb energy of the external force,
There is known an apparatus provided with origin returning means for returning the movable table to an origin which is a predetermined position with respect to the base before an external force is applied. More specifically, the movable table moves in one direction (X direction) in a horizontal plane, and moves in one direction (Y direction) perpendicular to the horizontal plane.
It has a stepped configuration, and is provided with an energy cut-off means and an origin return means such as a coil spring corresponding to each step. It absorbs seismic waves by two-dimensional displacement of the movable base, and is a so-called two-dimensional three-stage type.

[0004] The upper surface of the upper movable table serves as a mounting surface. Conventionally, the entire display case in which an exhibit is stored is installed on the mounting surface.

[0005]

Normally, when the weight of an exhibit is about 100 g to 10 kgf, the display case itself weighs about 200 to 1000 kgf.
With the conventional seismic isolation system, which protects the entire display case and consequently the display items, it is difficult and requires a lot of work to install the entire display case on the mounting surface of the seismic isolation device. was there. Also, in order to fully demonstrate the seismic isolation function as specified, it is necessary to provide a space between the display case and the wall of the exhibition hall that allows the movable table to be displaced. Or, there is a problem that a dead space is generated. In addition, since the display item is stored in the display case, the visitor cannot approach the display item more than a certain distance, but can usually get close to the display case itself. For this reason, including the protection of the visitor, the temporary seismic device and the movable platform linked to the seismic device must be used to prevent the seismic isolation function from being operated by an inadvertent force other than an earthquake, such as the visitor pushing the display case. It was indispensable to provide a stop mechanism and release the temporary stop mechanism of the movable base based on the operation signal of the seismic device. With this configuration, the cost of the apparatus has been considerably increased.

SUMMARY OF THE INVENTION The present invention mainly provides a seismic isolation device which can be easily installed and has a free exhibition layout, and also eliminates the need for a seismic device and a temporary fixing mechanism for a movable base associated therewith. Aim.

[0007]

According to the first aspect of the present invention, there is provided a seismic isolation device for protecting an exhibit stored in a display case, wherein the base is placed on an upper surface of the base. A movable table having a mounting surface provided in the, and energy blocking means for guiding the horizontal movement of the movable table and absorbing vibration energy when vibration energy such as an earthquake is transmitted,
In a seismic isolation device having origin return means for returning the movable base horizontally moved by vibration to an origin, a plurality of counterweights are housed inside the movable base so as to be able to be taken out. I have.

According to a second aspect of the present invention, there is provided a seismic isolation device for protecting an exhibit stored in a display case, comprising: a base; and a mounting surface provided on the upper surface of the base in an overlapping state. A movable base having: an energy cut-off means for guiding horizontal movement of the movable base when vibration energy such as an earthquake is transmitted to absorb vibration energy; and an origin for returning the movable base horizontally moved by vibration to an origin. Return means, the base is installed on the inner bottom surface side of the display case and the display is placed on the movable base,
In the seismic isolation device in which the size of the overall shape of the device is set to a size corresponding to the size and weight of the exhibit, the movable platform is formed in an openable and closable box shape, and a plurality of counterweights are provided inside. Are stored, and the weight of the movable table can be adjusted by taking in and out the counterweight.

According to the third aspect of the present invention, the first or second aspect is provided.
In the configuration described above, there is provided a side cover that covers a peripheral side surface of the movable base and temporarily fixes the movable base to the origin, wherein the side cover receives the vibration energy of a predetermined value or more. The movable table is provided so as to be protruded by the movable table to allow the movable table to move.

According to a fourth aspect of the present invention, there is provided a seismic isolation device for protecting an exhibit stored in a display case, comprising: a base; and a mounting surface provided on the upper surface of the base in an overlapping state. A movable base having: an energy cut-off means for guiding horizontal movement of the movable base when vibration energy such as an earthquake is transmitted to absorb vibration energy; and an origin for returning the movable base horizontally moved by vibration to an origin. A seismic isolation device provided with a return means, comprising a side cover that covers a peripheral side surface of the movable base and temporarily fixes the movable base to the origin,
The side cover is provided so as to be protruded by the movable base and allow the movable base to move when the movable base receives vibration energy equal to or more than a predetermined value.

According to a fifth aspect of the present invention, there is provided a seismic isolation device for protecting an exhibit stored in a display case, comprising: a base; and a mounting surface provided on the upper surface of the base in an overlapping state. A movable base having: an energy cut-off means for guiding horizontal movement of the movable base when vibration energy such as an earthquake is transmitted to absorb vibration energy; and an origin for returning the movable base horizontally moved by vibration to an origin. Return means, the base is installed on the inner bottom surface side of the display case and the display is placed on the movable base,
In a seismic isolation device in which the size of the entire shape of the device is set to a size corresponding to the size and weight of the exhibit, a side that covers a peripheral side surface of the movable base and temporarily fixes the movable base to the origin. Having a cover, wherein the side cover is provided so as to be protruded by the movable base and allow the movable base to move when the movable base receives vibration energy of a predetermined value or more. Has been adopted.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, a display 4 is stored and protected in a display case 2 having no bottom, and the display 4 is provided with a seismic isolation device 6 ( (Including the concept of use as a table or a table). As shown in FIG. 2, the base isolation device 6 includes a base member 8 directly fixed to a floor surface corresponding to a bottom surface of the display case 2, and a base fixed to the upper surface side of the base member 8 in an overlapping state. A first movable table 12 provided as a movable table which is provided on the upper surface side of the base 10 in a superposed state and moves in the X direction which is one horizontal direction with respect to the base 10; A second movable table 14 as a movable table which is mounted on the upper surface side of the movable table 12 in a superimposed state and moves in the Y direction which is a horizontal direction with respect to the base 10, and the base 10 and the first movable table; A first energy cutoff means 16 provided between the first movable table 12 and the first movable table 12 for guiding the horizontal movement of the first movable table 12 and absorbing vibration energy such as an earthquake; And a second movable table provided between the second movable table 4 to guide the horizontal movement and the second energy blocking means 18 as an energy cut-off means for absorbing vibration energy,
First origin returning means 20 provided between the base 10 and the first movable base 12 for returning the first movable base 12 to the origin.
And a second origin return means 22 provided between the first movable base 12 and the second movable base 14 to return the second movable base 14 to the origin. The perimeter in this state is covered with four side covers 24.

The base member 8 is formed in a substantially square shape similarly to the base 10, the first movable base 12, and the second movable base 14, and studs for fixing the base 10 are provided near four corners thereof. A bolt 26 is formed. At the four corners, two fixing holes 8a for fixing to the installation surface FL of the display case 2 are provided.
As shown in FIG. 4, they are fixed by slotted wood screws 28. As shown in FIG. 2, black points 8b at the four corners indicate contact positions of a horizontal level adjustment screw 30 of the base 10, which will be described later.

The base 10 has a horizontal level adjusting function, which is continuously performed by adjusting screws 30 which are screwed into screw holes 10a formed at four corners. The lower end of the adjusting screw 30 has a curved surface portion 30a that makes a point contact or a close contact.
The upper end is formed with a groove 30b for rotational adjustment with an operating tool such as a screwdriver. Counterbore holes 10b are formed in the vicinity of the screw holes 10a at the four corners. As shown in FIG. 4, the stud bolts 26 of the base member 8 are passed here and fixed by the nut members 32. The fixing of the base member 8 and the base 10 by the stud bolt 26 and the nut member 32
The adjustment is performed after the horizontal level adjustment of the base 10 is completed. As shown in FIG. 2, the first energy cutoff means 1
As the sixth embodiment, a slide rail as a commercially available linear moving means is used in this embodiment. The slide rails 16 are set so as to extend in the X direction on both sides of the base 10, and two slide rails are provided. The slide rail 16 is not fixed only to the base 10, but is fixed to both the base 10 and the first movable base 12. The specific structure and fixing manner of the slide rail 16 will be described in detail in the second energy cutoff means 18.

A first method for returning the first movable table 12 to the original point
As shown schematically in FIG.
A coil spring 34 as a return force source extending in the direction, and spring hook members 36 and 38 to which ends of the coil spring 34 are fastened.
Holding members 40, 42 fixed to the base 10 by means of welding, screwing, or the like, and holding the spring hook members 36, 38 at a fixed position so as to be detachable and applying initial tension to the coil spring 34.
And engaging members 44 and 46 fixed to the lower surface of the first movable base 12 by means such as welding or screwing and capable of engaging with the spring hooking members 36 and 38. The holding member 40 and the engagement member 44 are formed with a groove 40a into which the spring hook member 36 enters,
Similarly, the holding member 42 and the engaging member 46 also have grooves 42a and 46a into which the spring hooking member 38 enters. The second origin return means 22 has the same configuration.

As shown in FIG. 2, lower stoppers 48 and 50 are provided on the upper surface of the base 10 to limit the maximum displacement of the first movable base 12, as shown in FIG. Correspondingly, upper stoppers 52 and 54, which are other elements for restricting the maximum displacement, are provided on the lower surface of the first movable base 12.

As shown in FIG. 2, the second energy cutoff means 18 provided between the first movable table 12 and the second movable table 14 is a commercially available product similar to the first energy cutoff means 16. It consists of a slide rail. Similarly, the slide rails 18 are set to extend in the Y direction on both sides of the first movable base 12, and two slide rails 18 are provided. As shown in FIG. 4, the slide rail 18 includes an inner member 56, an outer member 58, a ball 60, and a ball retainer (not shown) that holds the ball 60.
The inner member 56 is fixed to the lower surface of the second movable base 14 with bolts 64 and nuts 66 via plate-shaped washers 62, while the outer member 58 is fixed to the upper surface of the first movable base 12 with bolts 68. Fixed. With the mounting structure of the slide rail 18, the first movable base 12 and the second movable base 14 can be connected, and the horizontal movement of the second movable base 14 in the Y direction with respect to the first movable base 12 is guided. Is done. The same applies to the first energy cutoff means 16.

As shown in FIG. 2, the second origin return means 22 for returning the second movable table 14 to the origin is provided with a return force source extending in the Y direction, similarly to the first origin return means 20. The coil spring 34, spring hook members 36, 38 to which the ends of the coil spring 34 are fastened, and the spring hook members 36, 3 which are fixed to the first movable table 12 by means such as welding or screwing.
Holding members 40 and 42 for holding the coil spring 34 in an initial tension by holding the movable member 8 at a fixed position so as to be detachable, and the second movable table 1
4 is fixed to the lower surface by welding, screwing, or the like, and is formed of engaging members 44 and 46 that can be engaged with the spring hooking members 36 and 38. The holding member 40 and the engaging member 44 have grooves 40a and 44a into which the spring hooking member 36 enters, and similarly, the holding member 42 and the engaging member 46 also have grooves 42a and 46a into which the spring hooking member 38 enters. ing. First
Lower stoppers 70 and 72, which are one element for restricting the maximum displacement of the second movable table 14, are provided on the upper surface of the movable table 12 of FIG. On the lower surface of the movable base 14, upper stoppers 74 and 76, which are other elements for restricting the maximum displacement, are provided. As shown in FIG. 2, around the first movable base 12, an L-shaped cover upper metal fitting 7 supporting the attaching / detaching function of the side cover 24 is provided.
8 are provided.

The second movable table 14 is roughly composed of a movable table main body 80 having a weight adjusting function, and a top plate 82 as an exhibition item mounting surface that covers an upper opening of the movable table main body 80. . The inside of the movable base body 80 is partitioned by a plurality of flat steel materials 84, and a plurality of strip-shaped counterweights 88 are stored in each partition 86. By moving the counter weight 88 in and out, the weight of the movable table can be finely adjusted in units of weight per one piece of the counter weight 88, whereby the coil springs of the first origin return means 20 and the second origin return means 22 can be adjusted. Optimal seismic isolation performance can be easily set for exhibits with different weights without replacing the 34. Although not explicitly shown in FIG. 2, as shown in FIG. 4, bolts 64 and nuts 66 for fixing the slide rail 18 to the second movable base 14 are provided.
In order to avoid interference between the counter weight 88 and the counter weight 88, a through hole 88a is formed in the counter weight 88 at a corresponding position.

As shown in FIG. 2, the side cover 24
A flat cover main body 90, an L-shaped cover lower bracket 92 that enters the upper surface of the base 10, and a source of attaching / detaching force for the side cover 24, that is, restricting the movement of the movable base until the vibration energy becomes a certain value or more. It is composed of rubber magnets 94 and 96 as a temporary fixing force source. The shapes, areas, and the like of the rubber magnets 94 and 96 are appropriately determined within a range where an appropriate temporary fixing force can be obtained. In addition, since the seismic isolation device 6 according to the present invention is installed in the display case 2 together with the exhibit, the appearance of the exhibit must be minimized as much as possible. From this perspective,
Side cover 24 and top plate 8 constituting the outer surface of the seismic isolation device
For No. 2, a material having excellent design and excellent coloring is selected.

Next, the seismic isolation operation of the seismic isolation device 6 will be described.
As shown in FIG. 6, when vibration energy that acts to X ₁ direction is unidirectional in the X direction occurs, the first movable table 1
2 is displaced in the X ₁ direction by the guide of the slide rail 16. Vibration energy is absorbed and attenuated by the extension of the slide rail 16. The spring hook member 36 held by the holding member 40 on the base 10 is taken away by the engaging member 44 of the first movable base 12, whereby the coil spring 34 is extended. When the first movable base 12 moves further,
The lower stopper 48 of the base 10 and the upper stopper 54 of the first movable base 12 abut against each other, thereby the first movable base 12
Is maximum. Opposite when displaced (X ₂ direction), the first movable base under the stopper 50 of the base 10 side 1
The maximum value is obtained when the upper stopper 52 on the second side comes into contact.

The same applies to the displacement in the Y direction. That is, as shown in FIG. 7, when vibration energy that acts to Y ₁ direction is unidirectional in the Y direction is generated, the second movable table 14 is displaced in the Y ₁ direction by the guide of the slide rail 18. Vibration energy is absorbed and attenuated by the extension of the slide rail 18. The spring hooking member 36 held by the holding member 40 on the first movable base 12 is taken away by the engaging member 44 of the second movable base 14, whereby the coil spring 34 extends. Strictly, the restoring force of the coil spring 34 also contributes to the absorption and damping of vibration energy. When the second movable table 14 further moves, the lower stopper 70 on the first movable table 12 and the upper stopper 76 on the second movable table 14 come into contact with each other, whereby the displacement of the second movable table 14 is maximized. Becomes When displaced to the opposite side (Y ₂ direction) is maximized by the second upper stopper 74 of the movable base 14 side to the first lower stopper 72 of the movable base 12 side abuts. By these two-dimensional displacements in the X and Y directions, the complex vibration energy acting in the horizontal plane direction can be absorbed to protect the exhibit. In this embodiment, the displacement is set to a single amplitude of 230 mm (both amplitudes of 460 mm), so that it can cope with the level of the Great Hanshin Earthquake (seismic intensity 7). The displaced first movable base 12 and second movable base 14 return to the origin by the first origin return means 20 and the second origin return means 22, respectively. The outer dimensions of the seismic isolation device 6 in this embodiment are up to approximately 400
mm and a height of about 45 mm. This small size and light weight is brought about for the first time by the new technical idea of the present invention that seismically isolates only the display items stored in the display case 2.

As shown in FIG. 8, the display item 4 is displaced by the displacement.
If the center of gravity G of the object is greatly deviated from the origin position C and becomes a so-called overhang state, the base 10 may be lifted and the exhibit 4 may fall over, but the base 10 is displayed via the base member 8. Since the display 4 is fixed to the installation surface FL of the case 2, the exhibit 4 does not fall down even in such a case.

Next, the function of the side cover 24 will be described. As shown in FIG. 4, when the lower cover 92 is placed on the upper surface of the base 10 and pressed, the lower cover 92 is pressed.
As a result, the upper rubber magnet 94 comes into close contact with the side surface of the first movable base 12 and the upper cover metal fitting 78, and the lower rubber magnet 96 comes into close contact with the side surface of the base 10. That is, this side cover
Reference numeral 24 is designed to be detachable by one-touch operation.
If the rubber magnets 94 and 96 are pulled out with a force higher than the attraction force, they can be easily removed.

As shown in FIG. 9, from the state shown in FIG. 4, ie, the state in which the first movable base 12 and the second movable base 14 are temporarily fixed by the side cover 24, the first movable base 12 has a certain value or more. When displaced in the X ₁ direction by the action of the vibration energy of, side cover -24 is removed butted automatically by the first movable base 12. Thus, the side cover 24
Although it is a mere mechanical component, it also has the function of a conventional seismic device and the function of a temporary fixing mechanism of a movable base that is linked to this device. Since there is no electrical component, no malfunction such as malfunction or inoperability occurs, and a reliable temporary fixing function can be obtained. Of course, as in the conventional case, a seismic device and a temporary fixing mechanism of a movable base interlocked therewith may be adopted. The first movable base 12 in FIG. 9 shows a case where the displaced X ₁ direction, the same also in the X ₂ direction. The same applies to the displacement of the second movable table 14 in the Y direction. Side cover-2
4, that is, the holding force of the first movable table 12 and the second movable table 14 until the vibration energy becomes equal to or more than a certain value, depends on the magnetic force, area, and the like of the rubber magnets 94 and 96, or It can be adjusted by the area of the cover upper bracket 78 fixed to one movable base 12. The cover body 90 of the side cover 24 and the second movable base 14
Since the top plate 82 constitutes the design of the seismic isolation device 6, the top plate 82 is provided with a design and color that does not impair the aesthetic appearance of the exhibit.

In the above embodiment, the base member 8 is fixed to the installation surface FL of the display case 2, but if the display case 2 has a bottom surface, it can be fixed to this bottom surface.

[0026]

According to the first aspect of the present invention, since the movable table has a weight adjusting function, it is possible to set the optimum seismic isolation performance without replacing the spring every time the displayed product is different. it can.

According to the second aspect of the present invention, since the movable base has a weight adjusting function, it is possible to set the optimum seismic isolation performance without replacing the spring every time the displayed product is different.

According to the third aspect of the present invention, in addition to the effects of the first or second aspect, in addition to the provision of a temporary stop function of the seismic sensor and the movable base interlocking therewith, a reliable temporary stop function without malfunction is provided. Can be obtained. Also, the design of the side cover
By imparting the coloring property, it is possible to suppress the effect on the aesthetic appearance of the display item due to being installed in the display case.

According to the fourth aspect of the present invention, it is possible to obtain a reliable temporary stop function without malfunction as compared with the temporary stop mechanism of the movable base interlocking with the seismic device.

According to the fifth aspect of the present invention, it is possible to obtain a reliable temporary stop function without malfunction as compared with the temporary stop mechanism of the movable base interlocking with the seismic device. In addition, by giving the side cover a design property and a coloring property, it is possible to suppress the effect on the aesthetic appearance of the display item due to being installed in the display case.

[Brief description of the drawings]

FIG. 1 is a perspective view of a seismic isolation device according to an embodiment of the present invention in a used state.

FIG. 2 is an exploded perspective view of the seismic isolation device shown in FIG.

FIG. 3 is an enlarged perspective view of the seismic isolation device shown in FIG.

FIG. 4 is a side view of a main part viewed from an arrow A side in FIG. 3;

FIG. 5 is a perspective view showing a first origin return means.

FIG. 6 is a schematic plan view showing displacement of a first movable base.

FIG. 7 is a schematic plan view showing displacement of a second movable base.

FIG. 8 is a schematic side view showing an overhang state due to a shift in the center of gravity of an exhibit.

FIG. 9 is a main part side view showing a state in which a side cover is disengaged due to displacement of a movable base.

[Explanation of symbols]

 2 Exhibit case 4 Exhibit 8 Base member 10 Base 12 First movable platform (movable platform) 14 Second movable platform (movable platform) 16 Slide rail (energy shut-off means) 18 Slide rail (energy shut-off means) 20 No. 1 origin return means (origin return means) 22 second origin return means (origin return means) 24 side cover

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kazutaka Sakai 3-81-1, Kumakumamoto, Kumamoto City, Kumamoto Prefecture, Kongo Co., Ltd. (56) References Japanese Utility Model No. 1-12443 (JP, U) Kaihei 4-13844 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F16F 15/00-15/32 F16F 1/00-6/00 A47F 3/00

Claims (5)

(57) [Claims] 1. A seismic isolation device for protecting an exhibit stored in a display case, comprising: a base; a movable base provided on the upper surface of the base in a superimposed state and having a mounting surface; An energy cut-off means for guiding the horizontal movement of the movable table when the vibration energy of an earthquake or the like is transmitted and absorbing the vibration energy, and an origin return means for returning the movable table horizontally moved by vibration to the origin. In the seismic isolation device, multiple counterweights enter and exit the movable table.
A seismic isolation device characterized by being housed so that it can be moved. 2. A seismic isolation device for protecting an exhibit stored in a display case, comprising: a base; a movable base provided on the upper surface of the base in a superimposed state and having a mounting surface; An energy cut-off unit that guides the horizontal movement of the movable table when the vibration energy of an earthquake or the like is transmitted and absorbs the vibration energy, and an origin return unit that returns the movable table that has horizontally moved by vibration to the origin. The base is installed on the inner bottom side of the display case and the display is placed on the movable base, and the size of the overall shape of the device corresponds to the size and weight of the display. The seismic isolation device set as described above, wherein a plurality of counterweights are housed inside the movable base so as to be able to be taken in and out. 3. The seismic isolation device according to claim 1, further comprising: a side cover that covers a peripheral side surface of the movable base and temporarily fixes the movable base to the origin. A seismic isolation device which is provided so as to be protruded by the movable base when receiving vibration energy equal to or more than a predetermined value to allow movement of the movable base. 4. A seismic isolation device for protecting an exhibit stored in an exhibition case, comprising: a base; a movable base provided on the upper surface of the base in a superimposed state and having a mounting surface; An energy cut-off means for guiding the horizontal movement of the movable table when the vibration energy of an earthquake or the like is transmitted and absorbing the vibration energy, and an origin return means for returning the movable table horizontally moved by vibration to the origin. In the seismic isolation device, there is provided a side cover that covers a peripheral side surface of the movable base and temporarily fixes the movable base to the origin, wherein the side cover receives the vibration energy of a predetermined value or more when the movable base receives vibration energy of a predetermined value or more. A seismic isolation device which is provided so as to be protruded by a movable base and allow the movable base to move. 5. A seismic isolation device for protecting an exhibit stored in a display case, comprising: a base; a movable base provided on the upper surface of the base in a superimposed state and having a mounting surface; An energy cut-off unit that guides the horizontal movement of the movable table when the vibration energy of an earthquake or the like is transmitted and absorbs the vibration energy, and an origin return unit that returns the movable table that has horizontally moved by vibration to the origin. The base is installed on the inner bottom side of the display case and the display is placed on the movable base, and the size of the overall shape of the device corresponds to the size and weight of the display. In the seismic isolation device set as described above, a side cover that covers a peripheral side surface of the movable base and temporarily fixes the movable base to the origin is provided. When I received The seismic isolation device is provided so as to be protruded by the movable base to allow the movable base to move.