Aseismatic mount for exhibiton of articles and showcase equipped with aseismatic mount

An aseismatic mount for exhibition of articles comprising a lower mount frame, a middle mount frame, an upper mount frame for mounting exhibition articles thereon, aseismatic mount having rollers integrally on an axis each of which is shifted eccentrically to each other in up and down directions, said aseismatic mounts being interposed between the lower mount frame and the middle mount frame at plural positions, and further aseismatic mounts having the same construction as the aseismatic mounts, and interposed between the middle mount frame and the upper mount frame.

BACKGROUND OF THE INVENTION 
1. Field of the Invention 
This invention relates to an aseismatic mount for exhibition of articles 
and a showcase equipped with the aseismatic mount for protecting works of 
art from an earthquake disaster. 
2. Prior Art 
There are many exhibition mounts and showcases installed in art galleries, 
museums, temples and so on to exhibit excavated cultural inheritances, 
Buddist statues, such works of art as sculptures, etc. However, since 
these exhibition mounts and showcases are conventionally installed 
directly on floors of rooms, the exhibition mounts and showcases collapse 
and the exhibited articles as works of arts are damaged or broken, meaning 
serious loss that cannot be recovered, once an earthquake takes place. As 
a countermeasure, structures are made solid by, for example, making 
frameworks of exhibition mounts and showcases thick. However, the 
structures not only cost much but also are difficult to completely prevent 
collapse in case of a great earthquake. Therefore, an aseismatic equipment 
has been developed in which such elastic body as neo-plain rubber is 
installed between installation surfaces and exhibition mounts or showcases 
so that shaking energy can be absorbed and diminished by the shearing 
strain. 
Since the level of horizontal displacement is low in case of a small 
earthquake, even such elastic body of the aseismatic equipment as 
above-mentioned can disminish the shaking energy. However, in case of a 
great earthquake when the level of horizontal displacement reaches as 
large as 30 cm, such elastic body as above-mentioned can not absorb the 
shaking energy of so great a displacement. Therefore, there exists a 
problem that most of the seismic waves are transmitted to the exhibition 
mounts and showcases via the elastic body, a consequence of which is that 
the exhibited objects and the whole showcases are overturned and great 
damages are incurred. Moreover, the aseismatic equipment installed with 
elastic body is exposed and visible, and does not harmonize with the 
exhibition mounts and the showcases, which damages the beauty of the 
exhibit as a whole. It may be considered that a board screen is installed 
at the bottom end of the exhibition mounts and the showcases to cover the 
aseistmatic equipment, however, there still exists a problem that it is 
difficult to maintain and inspect the aseismatic equipment. 
SUMMARY OF THE INVENTION 
This invention is made in view of the above-mentioned problems, and the 
purpose of the invention is to present an aseismatic mount for exhibition 
of articles and a showcase equipped with the aseismatic mount, in which 
the exhibition articles on the mount or the showcase itself and/or the 
exhibition articles contained therein are prevented from collapsing by 
disminishing a large horizontal shake without fail even in case of a great 
earthquake while making it easy to restore to the original position after 
the earthquake, and the outward appearance of the aseismatic mount and the 
showcase goes well with the surroundings while maintenance and inspection 
are easy to conduct. 
To achieve the above object, the aseismatic mount for exhibition of 
articles such as artwork according to the present invention comprises, a 
lower mount frame, a middle mount frame, an upper mount frame for mounting 
exhibition articles thereon, aseismatic means having rollers integrally an 
axis of each of which rollers is shifted eccentrically with respect to one 
another in up and down directions, said aseismatic means being interposed 
between the lower mount frame and the middle mount frame at plural 
positions, so as to roll one of said rollers, which has the axis shifted 
eccentrically in an upward direction, in contact with the lower mount 
frame, and to roll the other roller, which has the axis shifted 
eccentrically in a downward direction, in contact with the middle mount 
frame, and further aseismatic means having the same construction as the 
said aseismatic means, said further aseismatic means being interposed 
between the middle mount frame and the upper mount frame at plural 
positions in such a way that the rolling directions of the rollers cross 
the said aseismatic means, so as to roll one of said rollers, which has 
the axis shifted eccentrically upwardly, in contact with the middle mount 
frame, and to roll the other roller, which has the axis shifted 
eccentrically downwardly, in contact with the upper mount frame. 
The invention relates to the detailed construction of said aseismatic means 
of the aseismatic mount and in the upper mount frame, the middle mount 
frame and the lower mount frame, said aseismatic mount comprises an upper 
guide member fixed to the upper mount frame, a lower guide member fixed to 
the lower mount frame, a pair of the rollers interposed betwen the upper 
mount frame and the lower mount frame, each of said rollers having an axis 
which is shifted eccentrically with respect to one another in up and down 
directions, a rack provided integrally with an opposite face of each of 
the upper and lower guide members along the longitudinal direction of the 
guide members, a pinion provided integrally with one of the rollers having 
an axis shifted eccentrically upwardly, which roller rolls on the lower 
guide member, so as to engage with the rack of the lower guide member, and 
a further pinion provided integrally with the other roller having an axis 
shifted eccentrically downwardly, which roller rolls on the under surface 
of the upper guide member, so as to engage with the rack of the upper 
guide member. 
As set forth herein, as a pair of the rollers of the aseismatic means, an 
axis of each of which is shifted eccentrically with respect to one another 
and formed integrally, it may adopt the construction for combining the 
roller of small diameter and the roller of large diameter which is shifted 
eccentrically to the roller of small diameter in up and down directions, 
or may adopt the construction for combining the rollers having the same 
diameter an axis of each of which is shifted eccentrically with respect to 
one another in up and down directions. 
The invention relates to the construction of a preferable arrangment of the 
aseismatic means, wherein the lower mount frame, the middle mount frame, 
and the upper mount frame for mounting exhibition articles thereon, 
comprise a connecting member and an aseismatic means mount frame member 
which are combined in parallel crosses, in such a way that said aseismatic 
means is positioned at four corners where the connecting member and the 
aseismatic means mount frame member cross each other between the mount 
frames and opposite in up and down directions. 
The invention relates to a showcase provided with aseismatic means wherein 
said showcase is mounted on the upper mount frame and the lower mount 
frame of the aseismatic amount for exhibition of articles is fixed onto an 
installation face. 
In the showcase set forth, the invention further comprises a rectangular 
outer frame provided integrally with each of the lower mount frame, the 
middle mount frame and the upper mount frame of the aseismatic amount for 
exhibition of articles, said rectangular outer frame being formed in the 
same shape as the four walls of the showcase in plan view, so as to form a 
skirt portion of the showcase with these outer frames, and also form a 
clearance between the outer frames of the mount frames which are opposite 
in up and down direction, so as to allow the mount frame to move 
relatively in horizontal directions. 
The invention relates to the supporting construction of the showcase using 
another construction of the showcase and said aseismatic means. The 
showcase comprises a main body of the showcase fixed to a wall of a 
structure and a mount plate for mounting exhibition articles which plate 
is separated from the showcase at the lower end of an opening of the main 
body of the showcase, said aseismatic means being positioned below the 
mount plate along the longitudinal direction of the mount plate leaving a 
predetermined distance therebetween, so as to support the mount plate by 
means of the upper mount frame of each of the aseismatic means. 
Functions 
The aseismatic means, interposed between the lower mount frame and the 
middle mount frame, and between the middle mount frame and the upper mount 
frame, is provided with rollers an axis of each of which is shifted 
eccentrically with respect to one another, and one of the rollers an axis 
of which is shifted eccentrically upwardly, is rolled in contact with the 
upper surface of the lower mount frame and the other roller an axis of 
which is shifted eccentrically downwardly is rolled in contact with the 
undersurface of the upper mount frame. Therefore, in the normal state, the 
axis of each of the eccentric rollers is positioned on a vertical line, so 
that the weights of the exhibition material and the showcase may be 
supported stably on the lower mount frame via the aseismatic means which 
lower mount is installed on the floor. 
When the floor shakes horizontally due to the earthquake, the lower mount 
frame installed on the floor shakes in the same direction as the 
earthquake, and one of the eccentric rollers on the lower mount frame 
tends to roll in an opposite direction with respect to the lower mount 
frame about an axis of the other roller which is integral with the said 
roller, and the other roller tends to roll with respect to the 
undersurface of the middle mount frame integrally about an axis of the 
said eccentric roller. Thus, both of the rollers tend to roll in the 
directions for gradually increasing a half diameter from the rolling axis 
of the rollers to the rolling surface, and this tendency functions as a 
resistance for stopping roll of the rollers, and the weights of the 
exhibition articles and the showcase further increase the resistance, so 
as to stop rotation of both of the rollers. 
Accordingly, the exhibition articles and the showcase supported by the 
aseismatic means tend to move horizontally in the same direction as the 
lateral movement of the lower mount frame due to the time lag until both 
of the eccentric rollers have stopped after the floor has shaken 
horizontally. However, at the time, since the floor vibrates or shakes in 
an opposite direction, the exhibition articles and the showcase swings 
little. In the case that the floor shakes in an opposite direction, 
damping function of vibration can be carried out by means of the eccentric 
rollers in the same manner as mentioned above. Further, since the 
aseismatic means is interposed between the middle mount frame and the 
upper mount frame to crosswise to the same aseismatic means which is 
interposed between the lower mount frame and the middle mount frame, it is 
possible to damp swing or shock of the exhibition articles and the 
showcase in the directions of front and rear or right and left. 
Thus, the present invention acts to controls to reduce swing or shock of 
the exhibition articles by transmitting only the dampened vibration waves 
to the exhibition articles or the showcase while absorbing the horizontal 
vibration by means of a plurality of aseismatic means which comprise a 
pair of the eccentric rollers. The aseismatic means has a long frequency 
and does not resonate with resepct to the vibration of the earthquake, so 
that the vibration of the earthquake cannot be transmitted to the 
exhibition articles or the showcase as the upper structure. 
The lower mount frame, the middle mount frame, and the upper mount frame 
for mounting exhibition articles thereon, comprise a connecting member and 
an aseismatic means mount frame member which are combined in parallel 
crosses, in such a state that said aseismatic means is positioned at four 
corners where the connecting member and the aseismatic means mount frame 
member lay crosswise to each other between the mount frames disposed 
oppositely in up and down directions. Therefore, the exhibition articles 
or the showcase may be mounted stably. 
Further, since a rectangular outer frame, which is formed in the same shape 
as the four walls of the showcase in plan view, is provided integrally 
with each of the lower mount frame, the middle mount frame and the upper 
mount frame, so as to form a skirt portion of the showcase with these 
outer frames, the seismatic means arranged in the aseismatic mount may be 
hidden by those outer frames so that the seismatic mount may harmonize 
with the showcase as those outer frames comprise a part of the showcase. 
Moreover, since there is formed a clearance between the outer frames of 
the mount frames which are oppositely disposed in up and down directions, 
it becomes possible to relatively move the upper and lower mount frames 
smoothly in horizontal directions via the aseismatic means. 
Furthermore, in the normal state of exhibition, the body of the showcase 
does not move as it is fixed to the wall of the structure even if it is 
pushed suddenly. Since the mount plate for mounting exhibition articles is 
formed independently of the body of the showcase, the aseismatic mount 
supporting the mount plate for mounting exhibition articles is not in 
danger of movement. In addition, at the time of earthquake, although the 
body of the showcase moves integrally with the wall of the structure, 
swing or shake of the mount plate for mounting exhibition articles can be 
controlled since the vibration of the mount plate in the directions of 
front and rear or right and left transmitted from the floor, is reduced by 
means of the aseismatic means of the aseismatic mount. 
OBJECTS OF THE INVENTION 
A principal object of the invention is to provide an aseismatic mount for 
exhibition of articles such as art works, which comprises a lower mount 
frame, a middle mount frame, an upper mount frame for mounting exhibition 
articles thereon, aseismatic means having rollers integrally an axis of 
each of which is shifted eccentrically one another in up and down 
directions, said aseismatic means being interposed between the lower mount 
frame and the middle mount frame at plural positions, so as to roll one of 
said rollers, which has the axis shifted eccentrically upwards, in contact 
with the lower mount frame, and to roll the other roller, which has the 
axis shifted eccentrically downwards, in contact with the middle mount 
frame, and further aseismatic means having the same construction as the 
said aseismatic means, said further aseismatic means being interposed 
between the middle mount frame and the upper mount frame at plural 
positions in such a way that the rolling directions of the rollers cross 
the said aseismatic means, so as to roll one of said rollers, which has 
the axis shifted eccentrically upwards, in contact with the middle mount 
frame, and to roll the other roller, which has the axis shifted 
eccentrically downwards, in contact with the upper mount frame. 
Therefore, at the time of an earthquake, energy of horizontal vibration or 
shake in the directions of front and rear and right and left can be 
absorbed by means of pairs of the eccentric rollers which comprise 
aseismatic means, so that swing of the exhibited articles and the showcase 
mounted on the upper mount frame may be reduced greatly. 
Further, the aseismatic means interposed between the lower mount frame and 
the middle mount frame and between the middle mount frame and the upper 
mount frame, is provided integrally with the rollers which are formed 
eccentrically to each other, and one of the rollers, which has the axis 
shifted eccentrically upwards, is rolled in contact with the lower mount 
frame, and further the other roller, which has the axis shifted 
eccentrically downwards, is rolled in contact with the middle mount frame. 
Therefore, in the normal state, the center of each of the eccentric 
rollers can be positioned on a vertical line, so that the load of the 
exhibition articles or the showcase may be supported stably on the lower 
mount frame installed on the floor via the aseismatic means. 
It is another object of the present invention that the upper and lower 
guide members comprising the aseismatic means are attached to the mount 
frames which face each other in up and down directions, and a rack is 
provided integrally with the undersurface of a side of the upper guide 
member and with the upper surface of another side of the lower guide 
member. In addition, the eccentric roller is provided integrally with the 
pinion which engages with the rack of the lower guide member at the same 
axis as the roller, and with the pinion which engages with the rack of the 
upper guide member at the same axis of the other roller. Thereby, it may 
surely prevent both of the eccentric rollers from slipping with respect to 
the upper and lower guide members, so as to bring about aseismatic 
function while rolling all of the eccentric rollers of the aseismatic 
means with a common rolling speed. 
Yet another object of the present invention provides that between the mount 
frames which face each other in up and down directions, the aseismatic 
means is arranged respectively at the four corners where the connecting 
members assembled in parallel cross the outer frames and the mounting 
frame for the aseismatic mean cross. Therefore, it is possible to stably 
mount the exhibition articles or the showcase on the aseismatic mount. 
Further, at the time of the earthquake it may generate a stable swing and 
when the earthquake ceases, the upper mount frame mounting the exhibition 
articles or the showcase may be surely restored to the original state. 
It is still another object of the invention that each of the mount frames 
is provided with the rectangular outer frame which is in the same form as 
the four walls of the showcase in plan view, thus presenting an appearance 
that it comprises a part of the showcase, and the aseismatic means 
arranged in the frames may be hidden so as not to present a strange 
appearance, but to harmonize with the room. In addition, the aseismatic 
mount may be formed easily in proportion to the sizes of the exhibition 
articles or the size and shape of the showcase, so that it may present a 
serious and good appearance in harmony with the exhibition articles or the 
showcase. 
Yet another object of the present invention presents a large scaled 
aseismatic showcase and in the normal state of exhibition, the showcase 
does not move even if it is pushed suddenly since the body of the showcase 
is fixed to the wall of the structure. In addition, since the plate for 
mounting the exhibition articles is formed independently of the showcase, 
at the time of the earthquake, swing and shake of the the plate for 
mounting the exhibition articles in the directions of front and rear and 
right and left transmitted from the floor, can be reduced by means of the 
aseismatic means of the aseismatic mount, though the body of the showcase 
swings and moves integrally with the wall. Therefore, the swing may be 
controlled so that the exhibition articles may be surely protected from 
shake and swing. 
Other objects and advantages of the present invention will be apparent from 
the description of the detailed embodiments accompanying the following 
drawings.

DETAILED DESCRIPTION OF THE EMBODIMENTS 
Next, the actual embodiments of the present invention will be described 
with reference to the drawings. In FIG. 1, an aseismatic mount A comprises 
a lower mount frame 1, a middle mount frame 2 and an upper mount frame 3 
which are superposed on each other leaving a distance therebetween, and 
aseismatic means 4 is interposed between the lower mount frame 1 and the 
middle mount frame 2, and between the middle mount frame 2 and the upper 
mount frame 3. As shown in FIG. 2, the lower mount frame 1 is assembled by 
front and rear connecting members 11 and 12, which are rectangular and 
parallel to each other, and right and left aseismatic means mount frame 
members 13 and 14, which are parallel to each other and made of steel 
channel members, in such a state that the connecting members 11 and 12 and 
the mount frame members 13 and 14 are fixed integrally in parallel 
crosses. Although these mount frame members 13 and 14, and the front and 
rear connecting members 11 and 12 are crossed at right angle, the 
connecting members 11 and 12 are cut with just the width of the mount 
frame members 13 and 14 at their crossing portions, and the crossing 
portions of the mount frame members 13 and 14 are disposed in their cut 
portions 15, so as to fix those integrally by means of welding or the 
similar manner. Therefore, the front and rear connecting members 11 and 12 
are arranged on substantially the same level as the mount frame members 13 
and 14, so as to form the aseismatic mount as thin as possible. 
As shown in FIG. 3, the middle mount frame 2 comprises the right and left 
aseismatic means mount frame members 21 and 22, which are positioned above 
the right and left mount frame members 13 and 14 of the lower mount frame 
1 to face each other and made of longitudinal rectangular steel channel 
members of parallel arrangement, and the right and left aseismatic means 
mount frame members 23 and 24, which are formed laterally rectangular and 
crossed and fixed to the mount frame members 21 and 22 at a right angle. 
The right and left mount frame members 13 and 14 of the lower mount frame 
1 are formed in a letter of u in section, facing upwards, and on the other 
hand, the right and left mount frame members 21 and 22 of the middle mount 
frame 2 are formed in a letter of u in section, facing downwards. 
Therefore, the mount frame members 13 and 21, which are faced parallelly 
to each other in up and down directions, and the mount frame members 14 
and 22, face the opening sides of their grooves of each other, as shown in 
FIG. 1. 
As shown in FIG. 4, the upper mount frame 3 is constructed such that right 
and left aseismatic means mount frame members 31 and 32, which are formed 
longitudinally rectangular, and right and left aseismatic means mount 
frame members 33 and 34, which are face toward each other and made of 
laterally rectangular steel channel members, are assembled in parallel 
crosses and fixed integrally. These front and rear mount frames 33 and 34, 
and the right and left connecting members 31 and 32, are assembled in 
parallel crosses at right angle, in the same manner as the lower mount 
frame 1, but the connecting members 31 and 32 at their crossing portions, 
are cut with just the width of each of the mount frame members 33 and 34, 
and the crossing portions of the mount frame members 33 and 34 are 
disposed in their cutting portion and fixed integrally by means of welding 
or the similar manner. The front and rear mount frames 33 and 34 are 
formed to be a letter of u in cross section, facing downwards, and the 
mount frame members 33 and 34, are arranged parallelly with the front and 
rear mount frame members 23 and 24 of the middle mount frame 2, frame 
members 23 and 24 are formed in a letter of u in cross section, facing 
upwards, so as to face each of the opening sides of the grooves of the 
channels. 
As shown in FIGS. 5 through 7, the aseismatic means 4 is so constructed 
that circular rollers 42 and 43 of large and small diameters and pinions 
44 and 45 of large and small diameters are interposed between upper and 
lower guide members 40 and 41 having racks, the opposite faces of which 
are parallel to each other. In detail, a shallow groove 46 is formed with 
the undersurface of the upper guide member 40 at its center along a whole 
of the length and a rack gear 47 is provided integrally with the 
undersurface of an end of the side of the upper guide member 40. On the 
other hand, a deep groove 48 is formed with the upper surface of the lower 
guide member 41 at its center along a whole of the length and a rack gear 
49 is provided integrally with the upper surface of the other end of the 
side of the upper guide member 40. 
Further, each of the rollers 43 are provided integrally with both sides of 
the roller of large diameter 42, in such a state that the centers of the 
rollers 43 are eccentrically shifted upwardly with respect to the center 
of the roller of large diameter 42, and that the periphery of the roller 
of large diameter 42 projects from the peripheries of the rollers of small 
diameters 43. The rollers 43 are provided integrally with a pinion of 
large diameter 44, on an end thereof, which pinion has the same diameter 
as the roller 42 of large diameter and is positioned eccentricaly with 
respect to the rollers 43. The roller 43 on the other side is provided 
integrally with a pinion 45 having the same diameter as the roller 43 of 
small diameter. The center of the roller of large diameter 42 and the 
center of the pinion of large diameter 44 are on the same central rotation 
axes, and the centers of the rollers of small diameter 43 and the center 
of the pinion of small diameter 45 are also on the same central rotation 
axes. Each of the upper and lower guide members 40 and 41 has a width 
narrower than the width of the groove of the mount frame made of a steel 
channel member, but they are formed by rectangular plates which are 
shorter than the mount frame. 
Furthermore, the rollers of small diameter 43 rolls on the upper surface of 
the lower guide member 41 without contacting with the upper guide member 
40, and the roller of large diameter 42 rolls in such a state that it is 
always in contact with the bottom of the upper groove 46 without 
contacting the lower grove 48 while inserting the periphery of the roller 
42 into the grooves 46 and 48 of the upper and lower guide members 40 and 
41. On the other hand, the pinion 45 of small diameter roller 45 rolls in 
engagement with the rack gear 49 of the lower guide member 41 without 
contacting the upper guide member 40, and the pinion of large diameter 44 
rolls integrally with the rollers of large and small diameters 42 and 43 
and the pinion of small diameter 45, while engaging with the rack gear 47 
of the upper guide member 40, without contacting the lower guide member 
41. Therefore, when the rollers of small diameter 43 roll on the lower 
guide member 41, the roller of large diameter 42 rolls integrally 
therewith, and the upper guide member 40 mounted on the roller of large 
diameter 42, moves in the longitudinal direction thereof. The pinions of 
large and small diameters 44 and 45 provided integrally with those rollers 
of large and small diameters 42 and 43, rotate integrally with the rollers 
of large and small diameters 42 and 43, while engaging with the rack gears 
47 and 49, so as to prevent the rollers of large and small diameters 42 
and 43 from slipping with respect to the upper and lower guide members 40 
and 41. 
The aseismatic means 4, as constructed above, is disposed in the front and 
rear portion in the opposite grooves of the right and left mount frame 
members 13 and 14 where the groove of the lower mount frame 1 is opened 
upwardly, and the right and left mount frame members 21 and 22 where the 
groove of the middle mount frame 2 is opened downwardly. In other words, 
the aseimatic means 4 is interposed between the mount frame members 13 and 
21, and the mount frames 14 and 22, facing in up and down directions, in 
such a state that the upper and lower guide members 41 are directed 
longitudinally of the mount frame member. At the time, the lower guide 
member 41 of the aseismatic means 4 is set in the grooves of the mount 
frame members 13 and 14 of the lower mount frame 1, and the undersurface 
of the means is fixed to the bottom surface of the grooves by means of 
bolts, and also the upper guide member 40 is set in the grooves of the 
mount frame members 21 and 22 of the middle mount frame 2 and the upper 
surface of the means is fixed to the bottom surfaces of the grooves by 
means of bolts. 
Similarly, the aseismatic means 4 is disposed in both side portions in the 
opposite grooves of the front and rear mount frame members 23 and 24 where 
the groove of the middle mount frame 2 is opened upwardly, and the front 
and rear mount frame members 33 and 34 where the groove of the upper mount 
frame 3 is opened downwardly. In other words, the aseimatic means 4 is 
interposed at the four corner portions between the upper mount frame 3 and 
the middle mount frame 2, and between the mount frame members 23 and 33 
and the mount frame members 24 and 34, in such a state that the upper and 
lower guide members 41 are directed longitudinally of the mount frame 
member. At the time, the lower guide member 41 of the aseismatic means 4 
is set in the grooves of the mount frame members 23 and 24 of the middle 
mount frame 2, and the tinder surface of the means is fixed to the bottom 
surface of the grooves by means of bolts, and also the upper guide member 
40 is set in the grooves of the mount frame members 33 and 34 of the upper 
mount frame 3 and the upper surface of the means is fixed to the bottom 
surfaces of the grooves by means of bolts. Therefore, the aseismatic means 
4 disposed in the four portions between the lower mount frame 1 and the 
middle mount frame 2, and the aseismatic means 4 disposed in the four 
portions between the middle mount frame 2 and the upper mount frame 3 are 
arranged in up and down directions to cross one another at right angle. 
Thus, the aseismatic mount A is so constructed that the middle mount frame 
2 and the upper mount frame 3 are mounted on the lower mount frame in 
order, leaving a small clearance therebetween. 
The numeral 5 is a groove member of U-letter in section, and the front and 
rear ends thereof are fixed to the opposite surfaces of the front and rear 
connecting members 11 and 12 of the lower mount frame 1. As shown in FIG. 
2, the groove member 5 is arranged in parallel with the right and left 
mount frame members 13 and 14, and a viscous oil 51 is received in the 
groove. On the other hand, a resistant plate 6 is attached to the 
undersurface of the middle mount frame 2, to face the center portion of 
the groove member 5 in the longitudinal direction thereof, and the 
resistant plate 6 is dipped in the viscous oil 51 of the groove member 5. 
Similarly, a groove member 5a of U-letter shape in section is fixed 
provisionally between the right and left mount frame members 21 and 22 in 
parallel with the front and rear mount frame members 23 and 24, namely in 
a direction crossing the lower groove member 5, and a viscous oil 52 is 
received in the groove 5a. On the other hand, a crosspiece 35 is fixed 
between the right and left connecting members 31 and 32 of the upper mount 
frame 3, and a resistant plate 6a is attached to the undersurface of the 
crosspiece 35 to face the center portion of the groove member 5a in a 
longitudinal direction thereof, and then the resistant plate 6a is dipped 
in the viscous oil 52 of the groove member 5a. The groove members 5 and 5a 
receiving the viscous oils 51 and 52, and the resistant plates 6 and 6a, 
comprise a damper for absorbing a vibration or shake energy. The resistant 
plate 6 on the side of the middle mount frame is fixed to the undersurface 
of the upper groove member 5a. It is preferable to provide a cover for 
covering a groove member of U-letter in section with the middle mount 
frame 2 and the upper mount frame 3. Further, it may place the damper at 
an end of the mount frame, but may not place it at the center portion of 
the mount frame. 
The numeral 7 is a triger which is attached onto a base 76 fixed to a 
suitable portion of the groove member 5 which is fixed to the lower mount 
frame 1. As shown in FIG. 8, a red 73 is provided within a cylinder 71 to 
be always urged downwardly by means of a spring 72, and a solenoid 74 is 
also set in the cylinder 71. By conducting the solenoid 74, an iron piece 
75, which is a movable iron of the solenoid 74 and fixed to a lower end of 
the rod 73, is drawn against the force of the spring 72, so as to make the 
upper end of the rod 73 project from the cylinder 71. Accordingly, the 
upper end of the rod 73 is drawn into the cylinder 71 by means of the 
force of the spring 72 at the time of non-conduction such as a stoppage of 
electric power. Similarly, a triger 7a having the same construction as the 
above, is provided on a base 77 which is fixed to the center portion of 
the groove member 5a which is fixed to the middle mount frame 2. 
Further, plates 81 and 82 are faced toward each other above the trigers 7 
and 7a and fixed to the center portion of the groove member 5 of the 
middle mount frame 2 and the center portion of the crosspiece 35 of the 
upper mount frame 3, which plates have engaging openings 8 and 8a through 
which the upper end of the rod 73 is inserted slidably. It is possible not 
to attach the trigers 7 and 7a to the center portion of the mount frame. 
The numeral 92 is a vibration detector which is attached to a suitable 
portion of the lower mount frame 1, and electrically connected to the 
trigers 7 and 7a, so that the rod 73 leaves from the engaging opening 8 
and 8a by releasing excitation of the solenoid 74 of the trigers 7 and 7a 
at the time of an earthquake. 
The aseismatic mount A as consructed above, provides caster wheels 90 on 
the undersurface of the four portions of the lower mount frame 1, 
respectively and an adjuster 91 at the four corners thereof, respectively. 
The aseismatic mount A is fixed at a level on the setting surface such as 
a floor while lifting the wheels 90 from the setting surface by regulating 
the hight of the adjusters 91. 
Thus, the showcase is constructed by mounting a showcase B housing the 
exhibition articles on the aseismatic mount A. As shown in FIG. 9, it is 
preferable to interpose, between the aseismatic mount A and the showcase 
B, a middle mount C, which is thin and hollow having a lateral opening 93 
into which a fork of a forklift truck may be inerted. The exhibition 
articles such as art works may be mounted directly on the middle mount C 
without using the showcase B, and in this case, the middle mount C may be 
used as an exhibition mount. In the same drawing, it shows that an area of 
the showcase B in plan view, is larger than that of the aseismatic mount 
A, and in this case it may detachably hang a screen D on the four sides of 
the middle mount C for covering and hiding the aseismatic mount A . 
As shown in FIGS. 10 through 12, it is possible to fix the showcase A and 
rectangular outer frames 10, 20 and 30, which are the same form in plan 
view, to the upper and lower mount frames 1 and 3 and the middle mount 
frame 2 of the aseismatic mount A in such a state that the showcase and 
the rectangular outer frames are on a vertical plan with respect to the 
showcase B and the middle mount C. As shown in FIGS. 13 and 14, in the 
state that the rectangular outer frames 10, 20 and 30 comprise the 
aseismatic mount A, a clearance a is formed between the outer frames 
opposite in up and down directions, in order to allow each of the mount 
frames 1 to 3 to move relatively in horizontal directions. These 
rectangular outer frames 10, 20 and 30 comprise a skirt of the showcase B, 
so as to hide the aseismatic means 4 in the aseismatic mount A. 
To mount the showcase B on the aseismatic mount A, after the aseismatic 
mount A is first moved to the place of installation, hight and level 
adjustment is carried out by means of the adjuster 91, so as to lift the 
wheels 90 and fix the aseismatic mount on the surface of the place of the 
installation. Next, the showcase B is mounted on the middle mount C and 
fixed by means of bolts, and the fork of the forklift truck is inserted 
into the lateral openings 93 of the middle mount C and lifts it so as to 
adjust the position of the middle mount C on the aseismatic mount A, and 
then fix them by means of bolts. In advance, it is possible to mount the 
showcase B on the aseismatic mount A via the middle mount C and to move 
them to the place of installation and then fix them on the place by means 
of the adjuster 91. It may set the exhibition articles in the showcase B 
in advance, or set the exhibition articles in the showcase B after mount 
of the showcase on the aseismatic mount A. Further, these manners may be 
adopted for the case that the middle mount C is used as the mount for 
exhibition articles without using the showcase B. 
Each of the aseismatic means 4 arranged on the aseismatic mount A, provides 
the upper and lower guide members 40 and 41 which are disposed in the 
grooves of the mount frames made of steel channel members of the base 
frame which are faced toward each other. Therefore, the thickness of the 
whole of the aseismatic mount can be thin. In the normal state, due to the 
load of the showcase, the roller 42 of large diameter, which is integral 
with the roller 43 of small diameter and interposed between the upper and 
lower guide members 40 and 41, takes such a state that the roller 42 
places its center just beneath the center of the roller of small diameter 
and faces upwardly from its peripheral portion which is shortest from the 
center of the roller of small diameter, or the peripheral portion thereof 
which is least in the amount of projection from the periphery of the 
roller of small diameter. Thereby, the aseismatic means 4 is able to 
support the load of the showcase B stably. 
In the normal state at the time of exhibition, each of the solenoids 74 of 
the trigers 7 and 7a which are attached to the lower mount frame 1 and the 
middle mount frame 2 of the aseismatic mount A, is actuated, and the rod 
73 is made to project upwardly against the force of the spring 72 and 
inserted into each of the engaging openings 8 and 8a of the plates 81 and 
82 attached to the middle mount frame 2 and the upper mount frame 3, and 
then engaged. As the result, the middle mount frame 2 and the upper mount 
frame 3 become in the state that they are not movable in horizontal 
directions, regardless of existence of the rollers 42 and 43 of large and 
small diameters, so that free movement of the showcase B may be prevented 
when the showcase is pushed unexpectedly. 
Where maintenace or inspection of the aseismatic means 4 is carried out, 
after releasing fixation of the upper mount frame 3 and the middle mount 
C, the exhibition articles and the showcase B housing the exhibition 
articles are lifted together with the middle mount C by means of the 
forklift truck to move them away from the aseismatic mount A. It is 
possible to carry out inspection of the interior of the aseismatic menans 
4 in such a state that after releasing fixation of the upper and lower 
mount frames by means of the trigers 7 and 7a, the middle mount frame 2 
and the upper mount frame 3 are moved horizontally via the rollers of 
large and small diameters 42 and 43. 
Next, when an earthquake happens, the vibration detector 92 detects and 
electric conduction to the trigers 7 and 7a is cut. The trigers 7 and 7a 
are demagnetized by cutting conduction, the rod 73 goes into the cylinder 
71 by means of the force of the spring 72, so as to disengage with the 
engaging openings 8 and 8a, and the middle mount frame 2 becomes to be 
movable with respect to the lower mount frame 1 in a direction in which 
the upper mount frame 3 crosses the middle mount frame 2 at right angle, 
via the roller of large and small diameters 42 and 43. Where a rope is 
tied so that inspectors cannot approach the showcase B, it is possible to 
take such a construction that it provides a pin for fixing the mount 
frames facing in up and down direction togethher, and an engaging opening 
member for engaging and disengaging the pin without providing the 
vibration detector 92 or the trigers 7 and 7a. The pin engages with the 
engaging opening member only at the time of setting the aseismatic mount A 
or mounting the showcase B on the aseismatic mount A, and after setting 
them its engagement may be released. 
When the lower mount frame 1 vibrates or shakes reciprocally in a wave 
direction together with the installation base at the time of an 
earthquake, the rollers of large and small diameters 42 and 43 of the 
aseismatic means 4, which is arranged to be rolled in the directions of 
vibration, rolls relatively with respect to the lower mount frame 1 in an 
opposite direction. For example, in FIGS. 5 through 7, when the lower 
guide member 41 integral with the lower mount frame 1, moves in a 
direction of an arrow, the roller of small diamger 43 tightly contacting 
the lower guide member 41, is given a rotation force in a direction of 
counterclockwise, and the eccentric roller of large diameter 42 rolls 
integrally in the same direction, so that the upper guide member 40 
mounted on the roller of large diameter 42 tends to move relatively in an 
opposite direction with respect to the lower guide member 41. 
When the roller of large diamter 42 rolls as mentioned above, as its 
turning angle increases, since the amount of projection of the periphery 
of the roller of large diameter 42 from the periphery of the roller of 
small diameter 43, becomes great, and the center of the roller of large 
diameter 42 moves in an opposite direction with resepct to the center of 
the roller of small diameter 43, a resistant force occurs to prevent its 
rolling due to the load of the showcase B, and then the rollers of large 
and small diameters 42 and 43 stop rolling due to the force of resistance. 
From the situation, the upper guide member 40 supporting the exhibition 
articles, moves laterally in the same direction of the lower guide member 
41 with a time lag. 
Further, in the lateral movement of the upper guide member 40, the lower 
mount frame 1 moves in an opposite direction due to the reciprocal 
vibrations of the earthquake, and the rollers of large and small-diameters 
42 and 43 roll in an opposite direction according to the lateral movement 
so as to generate a resistant force in the opposite direction. Therefore, 
the upper guide member 40 tends to move laterally in the same direction as 
the lower guide member 42 after the upper guide member is moved for a very 
small distance in comparison with the lateral movement of the lower mount 
frame 1. Accordingly, the amount of lateral movement of the upper guide 
member 40 due to the earthquake becomes little, and as the result the 
exhibition articles mounted on the upper mount frame 3 via the upper guide 
member 40, becomes minimum. Swing of the lower guide member 40 is not 
transmitted to the upper guide member 42 when the lower guide member 40 
swings right and left, and the rollers of large and small diameters 42 and 
43 rotate right and left directions about an axis which is a contact point 
where the rollers of large and small diameters contact with the lower 
guide member 42. Namely, the lateral vibrations or shakes are reduced via 
the rollers of large and small diameters 42 and 43 and transmitted to the 
exhibition articles, so that swing of the exhibition articles can be 
controlled. 
The aseismatic means 4 interposed between the lower mount frame 1 and the 
middle mount frame 2, and the aseismatic means 4 interposed between the 
middle mount frame 2 and the upper mount frame 3, are arranged to cross 
each other. Therefore, any directions of vibration or shake including 
front and rear, and right and left directions are not transmitted to the 
exhibition articles or the showcase B, mounted on the upper mount frame 3, 
due to existance of the upper and lower aseismatic means 4. Further, each 
of the pinions of large and small diameters 44 and 45 integral with the 
rollers of large and small diameters 42 and 43, engages with each of the 
rack gears 47 and 49, which are provided with the upper and lower guide 
members 40 and 41, and then rolls together with the rollers of large and 
small diameters 42 and 43, so as to prevent the rollers of large and small 
diameters 42 and 43 from slipping with respect to the upper and lower 
guide members 40 and 41. As the result, the rollers of large and small 
diameters 42 and 43 of all of the aseismatic means 4 can be rotated with 
the same rotation speed. 
The resistant plates 6 and 6a, which project from the middle mount frame 2 
and the upper mount frame 3, are dipped in the viscous oils 51 and 52 in 
the grooves 5 arranged in parallel with the directions of movement of the 
lower mount frame 1 and the middle mount frame 2. Therefore, each of the 
lateral movements of the middle mount frame 2 and the upper mount frame 3, 
is absorbed and reduced by means of the viscous oils 51 and 52, and after 
the earthquake, the middle mount frame 2 and the upper mount frame 3, 
which mount the exhibition articles or showcase B, can be returned to 
their original positions quickly and surely. 
The amount of displacement in horizontal directions necessary for 
recovering vibrations or shakes at the time of a big earthquake, is, at 
most, 30 cm.about.40 cm. Therefore, the diameter of each of the rollers of 
large and small diameters 42 and 43 is determined so that it becomes 
possible to allow at least the amount of displacement between the upper 
and lower mount frames. In this case, the turnning angle of the roller of 
large diameter 42 should be determined less than 180 degrees in order to 
generate the above-mentioned resistant force. Therefore, when the rollers 
of large and small diameters 42 and 43 turn a half rotation, the amount of 
relative displacement in horizontal directions between the upper and lower 
mount frames, becomes the sum of circumference of the half circle of each 
of the rollers 42 and 43, and so the diameters of the rollers of large and 
small diameters 42 and 43 can be easily determined for recovering the 
amount of maximum displacement. 
In the embodiment as mentioned above, as the aseismatice means, the roller 
of large diameter 42 is provided integrally with the rollers of small 
diameters 43 on the both sides thereof, in such a state that the centers 
of the rollers of small diameters are eccentrically shifted upwards with 
respect to the center of the roller of large diameter. However, as shown 
in FIGS. 15 and 16, it is possible to adopt such a construction that the 
roller of small diameter 43 is provided integrally with the rollers of 
large diameters 42 on the both sides thereof, in such a state that the 
center O.sub.1 of each of the rollers of large diameters 42 is 
eccentrically shifted downwards with respect to the center O.sub.2 of the 
roller of small diameter 43. In this case, the roller of large diamter 42 
rotatably contacts with the undersurface of the upper guide member 40, and 
the pinion of large diameter 44, which has the same diameter as the roller 
of large diameter 42 and is arranged on the same center line with the 
roller of large diameter, engages with the rack gear 47, provided with the 
undersurface of the upper guide member 40. On the other hand, the roller 
of small diameter 43 rotatably contacts with the upper surface of the 
lower guide member 41 and the pinion of small diameter 45, engages with 
the rack gear 49, provided on the upper surface of the lower guide member 
41, said pinion having the same diameter as the roller of small diameter 
43 and arranged on the same center line with the roller of small diameter. 
As the aseismatic means, the following construction may be adopted except 
the above mentioned constructions. Namely, FIGS. 17 and 18 show the 
aseismatic means that the center O.sub.2 of the roller of small diameter 
43 is eccentrically shifted downwards with respect to the center O.sub.1 
of the roller of large diameter 42. In this case, it is possible to use 
the construction that the roller of large diamter 42 is provided with the 
rollers of small diameters 43 on the both sides thereof, as shown in FIG. 
18, or that the roller of small diameter 43 is provided integrally with 
the rollers of large diameters 42 on the both sides thereof. In either 
case, the roller of small diameter 43 the center of which is eccentrically 
shifted downwards, rotatably contacts with the undersurface of the upper 
guide member 40, and the pinion of small diameter 45, which has the same 
diameter as the roller of small diameter 43 and is arranged on the same 
center line with the roller of small diameter, engages with the rack gear 
47, provided with the undersurface of the upper guide member 41. On the 
other hand, the roller of large diameter 42, the center O.sub.1 of which 
is eccentrically shifted upwards, rotatably contacts with the upper 
surface of the lower guide member 40 and the pinion of large diameter 44, 
engages with the rack gear 49, provided on the upper surface of the lower 
guide member 44, said pinion having the same diameter as the roller of 
large diameter 42 and arranged on the same center line with the roller of 
large diameter. 
As the aseismatic means, as shown in FIGS. 20 and 21, it is possible to 
adopt such a construction that the rollers of same diameter 42a and 43a 
are formed integrally and eccentrically to shift their centers O.sub.1 and 
O.sub.2 up and down, without using the eccentric rollers of large and 
small diameters 42 and 43 which are mentioned above. The roller 43a the 
center O.sub.2 of which is eccentrically shifted downwards, rotatably 
contacts with the undersurface of the upper guide member 40, and the 
pinion of small diameter 45, which has the same diameter as the roller 43a 
and is arranged on the same center line therewith, engages with the rack 
gear 47 provided with the undersurface of the upper guide member 41. On 
the other hand, the other roller 42a the center O.sub.2 of which is 
eccentrically shifted upwards, rotatably contacts with the upper surface 
of the lower guide member 40, and the pinion of large diameter 44, which 
has the same diameter as the roller 42a and is arranged on the same center 
line therewith, engages with the rack gear 49 provided with the upper 
surface of the lower guide member 40. Thereby, it becomes possible to 
obtain the above-mentioned fuction of controlling vibration and shake. In 
any case, as the aseismatic means, the roller the center O.sub.2 of which 
is lower, rotatably contacts with the undersurface of the upper guide 
member 41, and the other roller the center O.sub.1 of which is higher, 
rotatably contacts with the upper surface of the lower guide member 42. 
Next, FIGS. 22 through 25 show such a construction that a showcase which is 
long laterally, is supported by the above mentioned aseismatic mount A. 
The showcase comprises a main body B.sub.1 of the showcase which is wide 
in lateral directions along the wall surface of the vertical wall W of the 
structure, and a base plate B.sub.2 for mounting exhibition articles which 
is separated from the main body B.sub.1 and arranged beneath the opening 
of the main body B.sub.1 to function as the bottom plate of the main body 
B.sub.1. A plurality of the aseismatic mounts A are arranged between a 
floor W.sub.1 of the structure for installing the showcase, and the base 
plate B.sub.2 for mounting exhibition articles, leaving a constant 
distance therebetween along the longitudinal directions of the base plate 
B.sub.2 and then received on the upper surface of the upper mount frame 3 
of each of the aseismatic mounts A. Between the aseismatic mounts A and A, 
a supporting beam 101 is provided with a stand member 102, is arranged in 
such a state that the end portion of the stand member is detachably 
connected to the end of the aseismatic mount A. 
The main body B.sub.1 of the showcase is fixed with its reverse side to the 
wall surface along the wall W of the structure. It is possible to give a 
good appearance to the showcase by covering the clearance between the 
floor W.sub.1 and the base plate B.sub.2 for mounting the exhibition 
articles to hide the aseismatic means and the like, by means of a screen 
plate 103 suspending from the front lower end of the main body B.sub.1 of 
the showcase or detachably attached to the lower end of the main body 
B.sub.1. The base plate B.sub.2 for mounting exhibition articles has a 
certain width in front and rear directions, and provides a flat belt plate 
which is long in the direction of width of the main body B.sub.1 of the 
showcase and has flexibility. This base plate B.sub.2 is arranged to be 
relatively movable with respect to the main body B.sub.1 of the showcase 
slight below the end of opening of the main body B.sub.1. 
A lift mechanism 200, comprising a jack, is arranged on the both sides of 
the undersurface of the aseismatic mount A, instead of the above-mentioned 
adjuster 91. As shown in FIGS. 26 through 28, the lift mechanism 200 
comprises front and rear fixed and inclined bases 201 and 202, each having 
an inclined surface inclining the upper surface downwards from the 
opposite end surfaces thereof toward the front and rear directions 
thereof, front and rear wedge members 203 and 204, each being slidably 
engaged with the undersurface of the inclined surface on the fixed and 
inclined bases 201 and 202, a horizontal cover 205, formed in a letter of 
u in section, facing downwards, and mounted between the upper surfaces of 
the wedge members 203 and 204, a screw rod 206 supported by and rotatably 
inserted into the front and rear wall of the horizontal cover 205 with 
both ends of the rod, said screw rod having a front half screw rod portion 
206a in the left direction which portion is inserted into a screw hole of 
left direction formed with the center portion of each of the front and 
rear wedge members 203 and 204 to penetrate them in the front and rear 
directions, and said screw rod also having a rear half screw rod portion 
206b in the right direction which portion is inserted into a screw hole of 
right direction formed with the center portion of each of the front and 
rear wedge members 203 and 204 to penetrate them in the front and rear 
directions, and a handle 207 for rotating the screw rod, disengagable with 
the screw rod 206 projecting from the front wall of the horizontal cover 
205. The front and rear fixed and inclined bases 201 and 202 are 
integrally connected to each other by means of a connecting member 208. A 
pin 209 projecting from the side of a connecting base 208, is inserted 
into a long hole 205' which is long in up and down directions and formed 
to cut the side wall of the cover 205. 
The lift mechanism 200 as constructed above, may be attached integrally to 
the both sides of the undersurface of the lower mount frame 1 of the 
aseismatic mount A, or constructed independently of the aseismatic mount 
A, so as to contact with the floor W.sub.1 and detachably insert into the 
lower space of the both sides of the lower mount frame 1. 
As shown in FIG. 29, both sides of the upper mount frame 3 of the 
aseismatic mount A, projects a connecting member 36 which is long in front 
and rear directions and made of steel plate having a constant thickness. 
The aseismatic mount A is interposed between the base plate B.sub.2 for 
mounting exhibition articles and the floor W.sub.1. A plurality of the 
aseismatic mount A are arranged in the longitudinal directions of the base 
plate B.sub.2, namely the directions of width of the wall W, leaving a 
predetermined distance therebetween, in such a state that the connecting 
members 36 projecting from both sides of the upper mount frame 3 are 
directed to right and left directions. A supporting beam 101 is interposed 
between the aseismatic mount A and A which are adjacent to each other. The 
upper surface of the supporting beam 101 is fixed integrally to the 
undersurface of the base plate B.sub.2 for mounting exhibition articles by 
means of fixing means such as screws. Further, as shown in FIG. 30, fixing 
means 300 is provided integrally with the side wall of each of the 
supporting beams 101 facing the aseismatic mount A . The fixing means 
detachably fixes the connecting member 36 which projects from the upper 
mount frame 3 of the aseismatic mount A. 
The fixing means 300 comprises a lateral groove member 301 which is made of 
an I-beam having substantially the same length as the connecting member 
36, and has a groove 302 which is opened laterally, and a lift mechanism 
200a having the same construction as the above-mentioned lift mechanism 
200, is fixed to the groove bottom of the lateral groove member 301. 
Between the lift mechanism 200a and the undersurface of the upper wall of 
the lateral groove member 301, the above-mentioned connecting member 302 
is interposed. It is possible to mount the lift mechanism 200a on the 
connecting member 36 and insert the lift mechanism into the groove 302. 
When the aseismatic mount A is not arranged between the base plate B.sub.2 
and the floor W.sub.1, for the reason of inspection or exchange, the base 
plate B.sub.2 for mounting exhibition articles, which is separated from 
the main body of the showcase B.sub.1 fixed to the wall W, is maintained 
horizontally by the supporting beam 101, as the stand member 102 fixed to 
the undersurface of the supporting beam 101, contacts with the floor 
W.sub.1, so that the exhibition articles such as art works on the base 
plate B.sub.2 for mounting exhibition articles may be supported stably. 
Next, when interposing the aseismatic mount A between the supporting beams 
101 and supporting the base plate B.sub.2 for mounting exhibition articles 
by the aseismatic mount, the screw rod 206 of the lift mechanism 200 
arranged on the both sides of the undersurface of the aseismatic mount A, 
is rotated by means of the handle 207, so as to move the wedge members 203 
and 204 on the front and rear fixed and inclined bases 201 and 202 beneath 
the inclined end portion of the fixed and inclined bases 201 and 202, so 
that the height of the cover 205 is made lower than the undersurface of 
the lower mount frame 1. Then, the aseismatic mount A is inserted, from 
the front side, into the clearance between the undersurface of the base 
plate B.sub.2 for mounting exhibition articles and the floor W.sub.1, 
while the caster wheel 90 rolls on the floor W.sub.1. The connecting 
members 36 which project from the end portions of both sides of the upper 
mount frame 3 of the aseismatic mount A, are inserted into the upper half 
portion of the groove 302 in the lateral groove member 301 of the 
supporting beams 101 and 101, which are adjacent to the connecting 
members. 
Thereafter, the handle 207 of the lift mechanism 200 is operated to rotate 
in an opposite direction against the above mentioned rotation, the wedge 
members 203 and 204 move slidably towards the inlined upper end portion on 
the fixed and include bases 201 and 202 which are positioned on the floor 
W.sub.1, so that the cover 205 moves upwards and the aseismatic mount A is 
lifted upwards and that the wheel 90 is lifted from the floor W.sub.1. 
Then, the upper surfaces of the connecting members 36 of the aseismatic 
mount A tightly contact with the undersurface of the upper wall of the 
groove 302 of the lateral groove 301 of the supporting beams 101 and 
thereafter the supporting beams 101 are lifted and the stand member 102 is 
remote away upwardly from the floor W.sub.1. 
In this state, the upper surface of the upper mount frame 3 of the 
aseismatic mount A contacts with the under surface of the base plate 
B.sub.2 for mounting exhibition articles. Where the clearance is formed 
between the upper surface of the upper mount frame 3 and the undersurface 
of the base plate B.sub.2 for mounting exhibition articles, a flexible 
plate deformable under pressure is adhered to the upper surface of the 
upper mount frame 3 and as soon as the stand member 102 is remote away 
from the floor W.sub.1, it may let the flexible plate contact with the 
undersurface of the base plate B.sub.2 for mounting exhibition articles, 
simultenously. 
The aseismatic mount A is lifted by means of the lift mechanisms 200 in 
such a manner as mentioned above, and the base plate B.sub.2 for mounting 
exhibition articles are supported on the floor W.sub.1 by means of the 
lift mechanisms 200 of all of the aseimatic mounts A. Further, the lift 
mechanism 220a, which is attached to the lower portion of the groove 302 
of the lateral groove member 301 of the supporting beams 101 is operated 
by the handle so as to lift the cover 205 for catching the supporting 
beams 101 by the cover 205 and the undersurface of the upper wall of the 
lateral groove member 301, so that the aseismatic mont A and the 
supporting beams 101 may be strongly connected to each other and 
integrated. 
Thus, the aseismatic mount A and the supporting beams 101 are connected to 
each other in right and left directions, and the base plate B.sub.2 for 
mounting exhibition articles above the aseismatic mount A and the 
supporting beams 101 and 101, can be maintained horizontally. Each of the 
aseismatic mounts A arranged beneath the base plate B.sub.2 for mounting 
exhibition articles, is fixed onto the lift mechanism 200 which is 
arranged on the floor W.sub.1 of the lower mount frame 1, and the middle 
mount frame 2 is swingable in the front and rear directions by means of 
the lower aseismatic means 4 which is arranged in the right and left 
directions between the lower mount frame 1 and the middle mount frame. 
Further, the upper mount frame 3 is swingable in the front and rear 
directions by means of the upper aseismatic means 4 which is arranged in 
the front and rear directions between the middle mount frame 2 and the 
upper mount frame. 
Next, when an earthquake happens, the vibration detector 44 detects it, in 
the same manner as mentioned above, so as to release magnetization of the 
the trigers 33 and 33a, and then the rod 37 goes into the cylinder 35 by 
means of the force of the spring 36, so that the engagement of the rod 
with the engaging openings 41 and 41a can be released. Then, the middle 
mount frame 2 becomes movable, via the aseismatic means 4, in right and 
left horizontal directions with respect to the lower mount frame 1 which 
is fixed to the surface of installation, and the upper mount frame 3 
becomes movable, via the aseismatic means 4, in front and rear horizontal 
directions, with respect to the middle mount frame 2. It is possible that 
the middle mount frame 2 becomes movable in front and rear horizontal 
directions with respect to the lower mount frame 1, via the aseismatic 
means 4 having the rollers 42 of an eccentric axis, and the upper mount 
frame 3 becomes movable, in front and rear horizontal directions with 
respect to the middle mount frame 2, via the aseismatic means 4 having the 
rollers 42 of an eccentric axis. 
When the lower mount frame 1 shakes and reciprocates in the directions of 
vibration together with the installation surface at the time of an 
earthquake, the vibration or shake is absorbed and reduced via the 
aseismatic means 4 which is arranged to roll in the directions of 
vibration as mentioned above, so that it may prevent the vibration from 
transmitting to the base plate B.sub.2 of mounting exhibition articles on 
the aseismatic mount A having the aseismatic means 4. 
When inspection or exchange of the aseismatic mount A, is carried out, the 
cover 205 of the lift mechanism 200 which lift mechanism is arranged 
beneath the both sides of the aseismatic mount A and supports all of the 
weight except the main body B.sub.1 of the showcase, is lowered by 
operation of the handle in the above-mentioned manner, and thereafter it 
may take out the cover 205 from the clearance between the floor W.sub.1 
and the base plate B.sub.2 of mounting exhibition articles. In 
practically, the lift mechanism 200a of the fixing means 300 of the both 
sides of the supporting beams 101 and 101, is operated by the handle so as 
to lower the cover 205, so that catch of the connecting member 36 on the 
side of the aseismatic mount A with respect to the lateral groove member 
301 of the fixing means 300, can be released. Thereafter, the cover 205 of 
the lift mechanism 200 on the side of the aseismatic mount A is lowerd by 
handle operation, so that the aseismatic mount A is lowered and the wheel 
90 attached to the undersurface thereof, contacts with the floor W.sub.1. 
On the other hand, the supporting beams 101 and 101 are also lowered 
integrally and contact the floor with the stand member 102. As the result, 
it brings about such a state that the base plate B.sub.2 of mounting 
exhibition articles may be supported by means of the supporting beams 101 
and 101, and thereafter the aseismatic mount A may be taken out from the 
clearance. 
The foregoing relates to preferred exemplary embodiments of the invention, 
it being understood that other variants and embodiments thereof are 
possible within the spirit and scope of the invention, the latter being 
defined by the appended claims.