JP3290070B2 - Seismic isolation device for display items in display cases - 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 a display article in a display case provided with a seismic isolation table for protecting a display case of works of art displayed in a room from an earthquake disaster.

[0002]

2. Description of the Related Art A large number of display cases exhibiting excavated cultural heritage, Buddha statues, arts such as sculptures, and the like have been installed in buildings such as art museums, museums, and temples. Since the display case is installed directly on the floor in the room, if an earthquake occurs, the display case collapses and the items stored inside are damaged or damaged, causing irreparable damage. Will be. For this reason, the structure of the display case has been strengthened by making it thicker, but it is not only extremely expensive but also a structure that does not allow collapse at all in the event of a large earthquake. It is difficult to do. For this reason, a display case has been developed in which an elastic body such as neoprene rubber is interposed between the installation surface and the display case so as to absorb and attenuate vibration energy by shear deformation.

[0003]

However, since the amount of horizontal displacement is small in the case of a small earthquake, the vibration energy can be reduced even with the above elastic body, but in the case of a large earthquake having a large horizontal displacement. The above elastic body cannot absorb vibration energy in that direction,
Most of the seismic waves are transmitted to the display case via the elastic body, and the display items and the entire display case stored in the display case fall over, resulting in serious damage. In addition, the seismic isolation device incorporating the elastic body is exposed to the outside and does not harmonize with the display case, which impairs the aesthetic appearance of the entire case. Therefore, a curtain covering the seismic isolation device is provided at the lower end of the display case. It is sufficient to provide a board, but this would make it difficult to maintain and inspect the seismic isolation device. Furthermore, in the case of a large-scale display case that is wide along the wall surface, if the display case is supported through a plurality of seismic isolation devices installed on the floor, the entire weight of the display case is extremely large. There is a problem that it is practically difficult to lift the display case, and therefore it is not possible to inspect or replace the seismic isolation device.

[0004] The present invention has been made in view of such a problem, and an object thereof is to provide a display article housed in a display case body by reliably attenuating a large horizontal vibration even in the case of a large earthquake. Can be prevented from collapsing, and the resilience to the original position after the earthquake subsides is good,
Furthermore, the seismic isolation table can be easily inspected and replaced even if the display case main body is large and wide, which can be arranged between the display case main body and the floor surface. An object of the present invention is to provide a seismic isolation device for display articles in a display case.

[0005]

According to the present invention, there is provided a seismic isolation device for an article in a display case according to the present invention, wherein the display case installed on the floor of a building comprises a display case body and the display case. The display case is fixed to the wall of the building, while the display case is separated from the display case body so as to be movable in the horizontal direction. This display article mounting base plate can be supported on the floor surface via leg members, and a seismic isolation table with a seismic isolation mechanism is interposed in the gap between the seismic isolation table and the floor surface. In a normal state, the display article mounting table is received by the seismic isolation table on the floor without supporting the display article mounting table on the floor with the leg members. The upper surface of the seismic isolation table is located between the lower surface of the display Is a arranged to become structurally the jack up mechanism for contacting and separating for.

In the above seismic isolation device for an exhibit in the display case, the seismic isolation base is loaded with the lower underframe, the intermediate underframe, and the upper underframe so as to be movable in a plane direction with respect to each other. , A small-diameter roller and a large-diameter roller eccentric to the small-diameter roller are integrally provided in several places between the lower underframe and the intermediate underframe, and a small-diameter roller is interposed by a seismic isolation mechanism. In addition to rolling the large diameter roller against the intermediate frame side while rolling in contact with the base frame, the same seismic isolation mechanism as the above-mentioned seismic isolation mechanism is installed in several places between the intermediate frame and the upper frame. The small-diameter roller is interposed in the direction orthogonal to the seismic isolation mechanism and rolls in contact with the intermediate underframe side, and the large-diameter roller is rolled in contact with the upper underframe side. The upper underframe of the seismic isolation table is fixedly attached to the lower surface of the display table And no separable and freely, and has a lower surface formed by providing a jack up mechanism a plurality of casters and MenShindai moves vertically adjusting the structure of the lower base frame.

According to a third aspect of the present invention, the seismic isolation table can be operated only when an earthquake occurs, and between the lower frame and the intermediate frame and between the intermediate frame and the upper frame of the seismic table. Are connected with a rod body, which is a movable iron core of the solenoid, and a cylinder body for inserting and removing the rod body, and the solenoid is electrically connected to the vibration sensor, and the rod body is detached from the cylinder body by the detection of the vibration sensor. It is configured to cause the

In the case where the display case main body is of a wide and large scale, the display article mounting base plate is formed in a flat strip shape along the lower end of the wall surface of the building, as described in claim 4. A wide display case main body fixed to a wall surface is disposed on the base plate, and the display case body is provided at appropriate intervals in the length direction of the base plate in a gap between the flat band-shaped long base plate and the floor surface. A support beam having a base plate interposed therebetween and being integrally fixed to a base plate between adjacent base isolation tables and having the leg members integrally provided on a lower surface is disposed, and the support beam and an upper base of the base isolation table are provided. It has a structure in which the end facing the frame is detachably fixed.

Further, the fixing means between the opposite end of the support beam and the upper underframe of the seismic isolation table is provided with a U-shaped groove at the end of the support beam in the front-rear direction. While a lifting mechanism is provided in the groove, a tip end of a connecting member projecting horizontally from an end of the upper underframe of the seismic isolation table is interposed in the groove, and the lifting mechanism is used for the lifting mechanism. The distal end of the connecting member is sandwiched between the mechanism and the inner surface of the flange of the groove. Further, as the lifting mechanism described in claims 1 and 4, a wedge member is slidably disposed on a fixed front and rear inclined table which is inclined upward from the front and rear ends toward the opposite end face, A horizontal cover that disables horizontal movement of the front and rear fixed inclined table is placed between these wedge members, and the screw directions of the front half and the rear half are formed on both wedge members as screw rods in opposite directions. And a handle body is detachably attached to the front end of the screw bar. As a lifting mechanism, wedge members are slidably disposed on front and rear movable inclined tables that are inclined downward from the front and rear ends toward the opposite end surface, and a horizontal cover is placed between these wedge members. In addition, a screw rod formed in a screw rod part in which the front half part and the rear half part have screw directions opposite to each other is threaded through the front and rear movable inclined table, and a handle body is detachably attached to the front end part of the screw rod. Can also be adopted.

[0010]

[Function] While the display case main body is fixed to the wall of the building, the display article mounting base plate, which is a case bottom plate for mounting display items such as works of art, is separated from the display case main body in the display case main body. The display article mounting base plate is installed on the floor via a seismic isolation base provided with a seismic isolation mechanism. The seismic isolation table has a lower frame, an intermediate frame, and an upper frame that are movably mounted on each other in a plane direction, and a small-diameter roller and a small-diameter roller are provided at several places between the lower frame and the intermediate frame. The same seismic isolation mechanism as the above-mentioned seismic isolation mechanism is provided in several places between the intermediate underframe and the upper underframe, with the seismic isolation mechanism having an eccentric large-diameter roller integrally provided. It is interposed in the orthogonal direction, and the upper frame of the seismic isolation table receives the display article mounting plate and the lower frame is set on the floor.

Therefore, when an earthquake occurs, the display case main body swings integrally with the wall surface of the building, but the display article mounting base plate is separated from the floor surface by a seismic isolation mechanism including a small-diameter roller and an eccentric large-diameter roller of the seismic isolation table. Vibrations in all directions from front to back, left and right, and from all directions are attenuated, so that shaking is suppressed.
Also, in the normal display state, even if the display case main body is unexpectedly pushed, the display case main body is fixed to the wall surface, so it is immovable, and the display article mounting base plate is formed separately from this display case main body. Therefore, there is no fear that the seismic isolation table will operate. Further, the seismic isolation table is not allowed to vibrate in a normal state, and is configured to operate only when an earthquake occurs.
That is, during normal times such as during exhibitions, the solenoid rod provided on one of the vertically opposed underframes is inserted into the cylinder provided on the other, and the seismic isolation table is deactivated. To prevent delusion even if the display case body is accidentally pushed. Then, when an earthquake occurs, the vibration sensor detects the vibration and shuts off the power to the solenoid, and separates the rod body from the cylindrical body to separate the intermediate frame and the upper frame from the lower frame through the seismic isolation mechanism. To move it back and forth and left and right.

When the seismic isolation table is to be inspected or replaced, the lifting mechanism is operated to lower the seismic isolation table, so that the display article mounting base plate is supported on the floor surface by the leg members and is released from the state. By lowering the shaking table further and cutting off the reception of the lower surface of the display table, the caster mounted on the lower surface of the lower frame of the seismic isolation table is grounded, and the lower part of the display table is alone. The inspection and replacement can be easily performed. After the inspection, or if a new seismic isolation table is inserted into the space below the display table, and the lifting mechanism is operated to raise the seismic isolation table, the casters and leg members move upward from the floor, The upper frame of the seismic isolation table abuts on the lower surface of the display article mounting table to receive the display article mounting table, and the lower frame of the seismic isolation table is fixed on the floor via the lifting mechanism. ,
Performs seismic isolation when an earthquake occurs. In this way, the seismic isolation table is disposed in the gap between the display article mounting base plate and the floor surface, so that it is not exposed to the outside, and the front surface of the gap is covered with a curtain plate or the like. As a result, a good appearance is provided.

When the display case main body fixed to the wall surface is a large-scale one that is wide and wide along the wall surface, the display article mounting base plate also has a flat band plate shape corresponding to the planar shape of the display case main body. A plurality of display articles housed in the display case main body are placed on the base plate at appropriate intervals, and in the gap between the base plate and the floor surface in the length direction of the base plate. The above-mentioned seismic isolation table is interposed at regular intervals, and a support beam integrally fixed to the base plate between adjacent seismic isolation tables and having the leg member integrally provided on the lower surface is provided. The opposite ends of the support beams and the upper frame of the seismic isolation table are detachably fixed.

According to this structure, the display article mounting base plate is supported by the plurality of seismic isolation bases on the floor surface and the support beams integrally connected between the adjacent seismic isolation bases, and the support beams are supported. By keeping the leg members away from the floor, when an earthquake occurs, the lower frames of all seismic isolation tables vibrate simultaneously and integrally with the floor in the same horizontal direction. Absorbed and attenuated by the large and small diameter rollers to prevent transmission to the display article mounting base plate in the same manner as described above, and even if the display case main body fixed to the wall shakes, the display article mounting base plate hardly shakes.

When the seismic isolation table is to be inspected or replaced, the lifting mechanism mounted in the groove at the end of the support beam, which is a means for connecting and fixing the support beam and the seismic isolation table, is lowered. Then, the upper base frame of the seismic isolation table inserted into the groove is released from being pinched by the connecting member, and the lifting mechanism provided on the side of the seismic isolation table is operated in the same manner as described above. After lowering the height, the leg members are grounded to the floor surface, and the display article mounting base plate is supported by the support beams, and then the seismic isolation table is independently moved from the space below the display article mounting base plate. Can be withdrawn.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, a specific embodiment of the present invention will now be described. The display case shown in FIGS. 1 and 2 has a wide width in a horizontal direction along a vertical wall W of a building. The display case main body 1 is separated from the display case main body 1 and is disposed at the lower end of the opening of the display case main body 1 and serves as a bottom plate of the display case main body 1 and serves as a bottom plate of the display case main body 1.
And the display article mounting base plate 2 in the gap 3 between the floor surface W1 of the building in which the display case is installed and the display article mounting base plate 2.
And a plurality of seismic isolation tables 4 arranged at regular intervals in the length direction of the table to receive the display article mounting base plate 2 and the display articles arranged between the seismic isolation tables 4 adjacent to the left and right. A support beam 6 with a leg member 5 is provided for receiving the mounting base plate 2 and detachably connecting its opposite end to the end of the seismic isolation table 4.

The display case body 1 has a back plate 1a fixed along the wall surface of the wall W of the building and is integrally fixed to the wall surface, and a lighting device and the like are arranged on the top plate 1b. The front is entirely glazed and the glass is divided into desired widths,
Each divided glass plate 1c is suspended from the upper end of the front opening of the display case main body 1 and can be freely opened and closed in the left-right direction. The front opening of the display case main body 1 is always closed by these divided glass plates 1c. I have. The gap 3 between the floor surface W1 and the display article mounting base plate 2 is covered with a curtain cloth hanging from the front lower end of the display case main body 1 or a curtain plate 25 detachably attached to the lower end. If this is done, the seismic isolation table 4 and the like are concealed, so that an even more attractive display case can be constructed.

The display article mounting base plate 2 constituting the bottom plate of the display case main body 1 is a flat band plate having a constant width in the front-rear direction and having a long rigidity in the width direction of the display case main body 1. The display case main body 1 is disposed slightly below the opening lower end of the display case main body 1 so as to be relatively movable to the front, rear, left and right with respect to the display case main body 1.

As shown in FIGS. 5 and 6, the seismic isolation table 4 has a lower frame 4a, an intermediate frame 4b, and an upper frame 4c, which are sequentially and sequentially spaced from each other in a loaded state. The seismic isolation mechanism 7 is interposed between the lower frame 4a and the intermediate frame 4b, and between the intermediate frame 4b and the upper frame 4c. FIG. 7 shows the lower underframe 4a.
As shown in FIG.
12 and the front and rear seismic isolation mechanism mounting frame members 13 and 14 made of channel steel members parallel to each other are fixedly combined in a cross-girder shape. Although these mounting frame members 13 and 14 intersect at right angles with the connecting members 11 and 12 on both sides, the connecting members 1
Cut off 1 and 12 by the width of the mounting frames 13 and 14
And are integrally fixed with the intersecting portion of the mounting frame members 13 and 14 interposed therebetween. Therefore, the connecting members 11 and 12 on both sides and the mounting frame members 13 and 14 are disposed at substantially the same height, and the seismic isolation table 4 is configured to be as thin as possible.

As shown in FIG. 8, the intermediate underframe 4b is a front-rear seismic isolation mechanism made of a horizontally elongated rectangular channel steel member that is opposed to the mounting frame members 13 and 14 of the lower underframe 4a, respectively. Attachment frame members 16 and 17 and vertically-elongated rectangular-shaped two-sided seismic isolation mechanism attachment frame members that are orthogonally crossed and fixed on these attachment frame members 16 and 17
It consists of 18 and 19. And the lower underframe 4a
The front and rear mounting frame members 13 and 14 are formed in an upward U-shaped cross section, while the front and rear mounting frame members 16 and 17 of the intermediate underframe 4b are formed in a downward U-shaped cross section, as shown in FIG. The mounting frame members 13 and 16 and the mounting frame members 14 and 17 that are vertically opposed to each other have their respective groove openings facing each other.

As shown in FIG. 9, the upper underframe 4c is made of a two-sided seismic isolation mechanism mounting frame 22, 23 made of a channel-shaped steel parallel to the front and rear end faces of the horizontally long rectangular connecting members 20, 21 parallel to each other.
As in the case of the lower underframe 4a, and fixed in a cross-girder shape. The mounting frame members 22 and 23 on both sides are formed in a downward U-shape in cross section, and the both mounting frame members 18 and 19 formed in a U-shape in cross section on the intermediate base frame 4b are vertically parallel to each other. The opening sides of the respective grooves are arranged to face each other. Further, a connecting member 24 made of a steel plate having a rectangular shape and having a constant thickness, which is long in the front-rear direction, is fixed to the outer end surfaces of the both-side mounting frame members 22 and 23 by projecting horizontally in the width direction. Note that the upper and lower surfaces of the connecting member 24 are formed so as to obtain a large frictional resistance by providing a matte-like fine unevenness.

As shown in FIGS. 10 to 12, the seismic isolation mechanism 7 has circular large and small diameter rollers 72, 73 and large and small diameter pinions 74, 75 between rack-equipped upper and lower guide members 70, 71 whose opposing surfaces are parallel to each other. Intervening. For details, upper guide member
A shallow groove 76 is engraved over the entire length at the center of the lower surface of 70 and a rack is formed on the lower surface of one side end of the upper guide member 70.
77 is provided integrally over the entire length. On the other hand, a deep groove 78 is engraved over the entire length in the center of the upper surface of the lower guide member 71, and a rack 79 is integrally provided on the upper surface of the other side end.

Further, the small-diameter rollers 73, 73 are eccentric with respect to the center of the large-diameter roller 72 on both sides of the large-diameter roller 72, and the large-diameter rollers 72 are deviated from the outer peripheral surface of the small-diameter rollers 73, 73. Are provided integrally with the outer peripheral surface of the
In addition, a large-diameter pinion 74 having the same diameter as the large-diameter roller 72 is provided integrally with the small-diameter roller 73 so as to be eccentric to the small-diameter roller 73 on one side, and these small-diameter rollers 73 are provided on the other small-diameter roller 73. A small diameter pinion 75 having the same diameter is provided integrally. The centers of the large-diameter roller 72 and the large-diameter pinion 74 are on the same rotation center axis, and similarly, the small-diameter rollers 73 and 73 and the small-diameter pinion 75
Are provided on the same rotation center axis. The upper and lower guide members 70 and 71 are formed of square bars that are narrower than the groove width of the mounting frame member made of the above-described channel steel and shorter than the mounting frame member.

The small diameter roller 73 is connected to the upper guide member 70.
Rolls on the upper surface of the lower guide member 71 without contacting the upper guide member 71, and the large-diameter roller 72 immerses the outer peripheral portion in the grooves 76, 78 of the upper and lower guide members 70, 71 without contacting the lower groove 78. It rolls while always in contact with the bottom surface of the upper groove 76. On the other hand, the small-diameter pinion 75 rolls while engaging with the rack 79 of the lower guide member 71 without contacting the upper guide member 70, and the large-diameter pinion 74 rotates without contacting the lower guide member 71. Rolls integrally with the large- and small-diameter rollers 72 and 73 and the small-diameter pinion 75 while meshing with 77. The large and small diameter pinions 74, 75 provided integrally with the large and small diameter rollers 72, 73 rotate integrally with the large and small diameter rollers 72, 73 while meshing with the racks 77, 79, respectively. This prevents the upper and lower guide members 70 and 71 from slipping against the upper and lower guide members 70 and 71, respectively.

The seismic isolation mechanism 7 constructed as described above includes the front and rear mounting frame members 13 and 14 in which the grooves of the lower underframe 4a are open upward and the front and rear mounting frame materials in which the grooves of the intermediate underframe 4b are open downward. 1
In both sides between the opposed grooves with 6, 17; namely, the upper and lower underframes 4
a, 4b mounting frame members vertically opposed with the upper and lower guide members 70, 71 facing the length direction of the mounting frame material at the four corners
It is interposed between 13, 16 and between 14, 17. At this time, the lower guide member 71 of the seismic isolation mechanism 7 is attached to the mounting frame members 13 and 14 of the lower underframe 4a.
The lower surface is fixed to the groove bottom surface with bolts or the like, and the upper guide member 70 is attached to the mounting frame member 16 of the intermediate frame 4b.
17 are housed in the groove, and the upper surface is fixed to the groove bottom surface with bolts or the like.

Similarly, between the opposed grooves between the two mounting frame members 18, 19, in which the grooves of the intermediate underframe 4a open upward, and the two mounting frames 22, 23, in which the grooves of the upper underframe 4c open downward. The seismic isolation mechanism 7 was positioned vertically at the four corners between the upper underframe 4c and the intermediate underframe 4b, with the upper and lower guide members 71, 71 oriented in the length direction of the mounting frame material. Mounting frame material 18,
It is interposed between 22 and 19,23. At this time, seismic isolation mechanism 7
The lower guide member 71 is housed in the grooves of the mounting frame members 18 and 19 of the intermediate underframe 4b, and the lower surface thereof is fixed to the groove bottom surface by bolts or the like, and the upper guide member 70 is mounted on the upper underframe 4c. It is housed in the grooves 22 and 23 and its upper surface is fixed to the groove bottom surface by bolts or the like. Therefore, the seismic isolation mechanism 7 interposed in the four parts between the lower underframe 4a and the intermediate underframe 4b and the seismic isolation mechanism 7 interposed in the four parts between the intermediate underframe 4b and the upper underframe 4c intersect at right angles to each other. It is arranged up and down in the state where it is made to be. The intermediate frame 4b and the upper frame 4c are configured to be stacked on the lower frame 4a via the seismic isolation mechanism 7 with a small gap vertically.

Numeral 26 denotes a U-shaped groove member having both side ends fixed to the opposing surfaces of both side connecting members 11 and 12 of the lower underframe 4a.
As shown in FIG. 7, the viscous oil 27 is accommodated in the grooves provided in parallel to the front and rear mounting frame members 13 and 14. on the other hand,
A resistance plate 28 is mounted on the lower surface of the intermediate underframe 4b so as to face the center in the longitudinal direction of the groove member 26, and the resistance plate 28 is immersed in the viscous oil 27 of the groove member 26. . Similarly,
Between the front and rear mounting frame members 16 and 17 of the intermediate underframe 4b, both side mounting frame members 18,
A groove member 29 having a U-shaped cross section is fixedly mounted in parallel with 19, that is, in a direction orthogonal to the lower groove member 26, and a viscous oil 30 is accommodated in the groove. Meanwhile, the upper underframe
A crosspiece member 31 is fixed between the front and rear connecting members 20 and 21 of 4c, and a resistance plate 32 is mounted on the lower surface of the crosspiece member 31 so as to face the center in the longitudinal direction of the groove member 29. The resistance plate 32 is immersed in the viscous oil 30 of the groove member 29. The groove members 26 and 29 containing the viscous oils 27 and 30 and the resistance plates 28 and 32 constitute a damper for absorbing vibration energy.
The resistance plate 28 on the side of the intermediate frame 4b is fixed to the lower surface of the upper groove member 29. Further, it is desirable that a lid member covering the groove member having the U-shaped cross section is provided on the intermediate underframe 4b and the upper underframe 4c, and the damper is provided not at the center of the underframe but at the end of the underframe. It may be provided.

33 is the groove member fixed to the lower frame 1
With a trigger mounted on a stand 34 fixed in place in 26,
As shown in FIG. 13, a rod 37 constantly urged downward by a spring 36 is provided in a cylinder 35, and a solenoid 38 is housed in the cylinder 35, and the solenoid 38 is energized. As a result, the iron plate piece 39 fixed to the lower end of the rod body 37, which is the movable iron core of the solenoid 38, is pulled in against the force of the spring 36 so that the upper end of the rod body 37 protrudes from the cylindrical body 35 and a power failure or the like occurs. When the power is supplied, the upper end of the rod body 37 is immersed in the cylindrical body 35 by the force of the spring 36. Similarly, a trigger 33a having the same structure is mounted on a base 40 fixed at an appropriate position on the side surface of the groove member 29 fixed to the intermediate frame 4b.

Further, the upper ends of the rod bodies 37 of the triggers 33, 33a are formed on the side surfaces of the groove member 29 of the intermediate frame 4b and the side surface of the cross member 31 of the upper frame 4c so as to face above the triggers 33, 33a, respectively. Plate pieces 42 and 43 provided with locking holes 41 and 41a through which the parts can be inserted and removed are fixed. The triggers 33 and 33a do not have to be attached to the center of the underframe. Reference numeral 44 denotes a vibration sensor mounted at an appropriate position on the lower underframe 1, which is electrically connected to the triggers 33 and 33a so that when an earthquake occurs, the triggers 33 and 33a are provided.
Release the excitation of the solenoid 38, and lock the rod body 37 with the locking hole 41.
It is configured to disengage from 41a.

The seismic isolation table 4 configured as described above has wheels 10 mounted on four sides of the lower surface of the lower underframe 4a, and a lifting mechanism 8 composed of a jack on both sides on the lower surface.
As shown in FIGS. 14 to 16, the lifting mechanism 8 includes front and rear fixed inclined bases 81 and 82 formed on inclined surfaces whose upper surfaces are inclined downward in the front-rear direction from the opposite end surfaces, and Front and rear wedge members 83 and 84 slidably engaging the inclined lower surfaces on the tables 81 and 82, respectively, and a horizontal cover 85 having a downward U-shaped cross section placed between the upper surfaces of the wedge members 83 and 84, Front and rear wedge members 83,
A left-hand screw hole 86a in the front half and a right-hand screw rod 86b in the rear half are respectively threaded through the left screw hole and the right screw hole penetrating in the center of 84. And a screw rod 86 rotatably inserted and supported at both ends through the front and rear wall surfaces of the horizontal cover 85, and a screw rod rotation that is detachably engaged with a tip end of the screw rod 86 protruding from the front wall surface of the horizontal cover 85. Handle 87
It is composed of The front and rear fixed inclined tables 81 and 82 are integrally connected by a connecting member 88. And the tether
A pin 89 projecting from the side surface of the cover 88 is inserted into a vertically long hole 85 ′ cut out from the side surface of the cover 85.

The lifting mechanism 8 constructed as described above may be integrally mounted on both sides of the lower surface of the lower underframe 4a of the seismic isolation table 4, or may be separated from the seismic isolation table 4 and the floor. The lower underframe 4a may be removably inserted into the lower space on both sides in contact with the surface W1.

The seismic isolation table 4 is interposed between the display article mounting base plate 2 and the floor surface W1, and extends at predetermined intervals along the length direction of the display article mounting base plate 2, that is, along the width direction of the wall W. And the connecting members 24, 24 projecting from both sides of the upper underframe 4c are arranged in a state of being directed in the left-right direction. Is interposed. The upper surfaces of these support beams 6 are integrally fixed to the lower surface of the display article mounting base plate 2 by fixing means such as screws. Further, as shown in FIG. 17, the connecting members 24 projecting from the upper underframe 4c of the seismic isolation table 4 are provided on the side end faces of the support beams 6 facing the seismic isolation table 4.
Is integrally provided with fixing means 9 for detachably fixing.

The fixing means 9 includes a transverse groove member 91 having a length 92 substantially equal to the length of the connecting member 24 and having a groove 92 made of an I-shaped steel opened in the lateral direction. A lifting mechanism 8a having the same structure as the mechanism 8 is fixed, and the connecting member 24 is interposed between the lifting mechanism 8a and the lower surface of the upper wall of the lateral groove member 91. The lifting mechanism 8a
May be placed on the connecting member 24 and inserted into the groove 92.

When the seismic isolation table 4 is not disposed between the display article mounting base plate 2 and the floor surface W1 for inspection or replacement, the display case main body 1 fixed to the wall W is not used. The separated display article mounting base plate 2 is maintained horizontally by the support beams 6 with the leg members 5 fixed to the lower surface of the support beam 6 being in contact with the floor surface W1. It is possible to stably support display articles such as articles.

Next, in order for the seismic isolation table 4 to be interposed between the support beams 6 and 6 to support the display article mounting base plate 2 with the seismic isolation table 4, first, the lower surface of the seismic isolation table 4 must be placed on both sides. The screw rod 86 of the lifting mechanism 8 provided is rotated by the handle 87 to move the wedge members 83, 84 on the front and rear fixed inclined tables 81, 82 to the lower inclined end sides of the fixed inclined tables 81, 82. The height of the cover 85 is made lower than the lower surface of the lower underframe 4a, and the seismic isolation table 4 is placed in the gap 3 between the lower surface of the display article mounting base plate 2 and the floor surface W1 from the front side to the floor surface W1.
The connecting members 24, 24 protruding from both ends of the upper underframe 4c of the seismic isolation table 4 are inserted into the lateral groove members 91 of the support beams 6, 6 on both sides by inserting the wheels 10 while rolling them. Intervene in the upper half of 92.

Thereafter, when the handle 87 of the lifting mechanism 8 is rotated in the direction opposite to the above, the wedge members 83 and 84 are moved to the floor surface W1.
The sliding movement is performed on the fixed inclined bases 81 and 82 installed on the upper side toward the upper inclined end side, the cover 85 is moved upward, the seismic isolation table 4 is lifted upward, and the wheels 10 are moved from the floor surface W1. After the upper surface of the connecting members 24, 24 of the seismic isolation table 4 comes up close to the lower surface of the upper wall of the groove 92 of the lateral groove member 91 of the support beams 6, 6, the support beams 6, 6 are raised.
Is lifted, and the leg member 5 is separated upward from the floor surface W1.

In this state, the upper underframe 4c of the seismic isolation table 4
Also contacts the lower surface of the display article mounting base plate 2, but if a gap is formed between the upper surface of the upper underframe 4 c and the lower surface of the display article mounting base plate 2, the upper surface of the upper underframe 4 c An elastic plate such as a rubber plate that can be compressed and deformed is pasted, and the leg member 5 is
The elastic plate may be brought into contact with the lower surface of the display article mounting base plate 2 at the same time as the distance from W1. In addition, connecting member 24
If an elastic plate such as a rubber plate is adhered to the upper and lower surfaces of the upper frame 4c, it is not always necessary to adhere the elastic plate to the upper underframe 4c side.

Each seismic isolation table 4 is lifted by the lifting mechanism 8, 8 as described above, and the display article mounting base plate 2 is supported via the supporting beams 6, 6, and the lifting mechanism 8 of all the seismic isolation tables 4, 8. By 8, the state is made to be supported on the floor surface W 1. Further, the support beam 6,
A lifting mechanism 8a attached to the lower part of the groove 92 of the lateral groove member 91 of FIG.
The handle 85 is operated to raise the cover 85 in the same manner as described above, so that the support beams 6, 6 are sandwiched between the cover 85 and the lower surface of the upper wall of the lateral groove member 91, and the seismic isolation table 4, the support beams 6, 6, Are firmly connected and integrated. As such a means for detachably fixing the connecting member 24 to the support beams 6, 6, for example, a screw rod may be threaded through the lower wall of the lateral groove member 91 without using the lifting mechanism 8a. The connecting member 24 may be held between the holding plate attached to the upper end of the screw bar and the upper wall of the lateral groove member 91 by rotating the screw bar.

In this manner, the seismic isolation table 4 and the support beams 6, 6 are integrally connected in the left-right direction, and the display articles on which the display articles are mounted on the seismic isolation table 4 and the support beams 6, 6. Mounting base plate 2
Is supported horizontally. Each seismic isolation table 4 disposed below the display article mounting base plate 2 has its lower underframe 4a fixed on a lifting mechanism 8 installed on the floor surface W1, and an intermediate underframe.
4b is swingable in the front-rear direction by a lower seismic isolation mechanism 7 arranged between the lower frame 4a and the lower frame 4a in the left-right direction.
Further, the upper underframe 4c is swingable in the front-back direction by the upper seismic isolation mechanism 7 disposed in the front-back direction between the upper underframe 4c and the middle underframe 4b.

In addition, each seismic isolation mechanism 7 normally
With the load from the upper side, the center of the large-diameter roller 72 is positioned directly below the center of the small-diameter roller 73, and the outer peripheral surface portion that is the shortest with respect to the center of the small-diameter roller, that is, the amount of projection from the peripheral surface of the small-diameter roller is the smallest. The intermediate frame 4b and the upper frame 4c stably support the display article mounting base plate 2 with the outer peripheral surface thereof facing upward without swinging.

During normal times such as during exhibition, the solenoids 38 of the triggers 33 and 33a mounted on the lower frame 4a and the intermediate frame 4b of the seismic isolation table 4 are energized, and the force of the spring 36 is applied. The locking holes of the plate pieces 42 and 43 attached to the intermediate frame 4b and the upper frame 4c by projecting the rod body 37 upward against
The lower frame 4a is inserted into the lower frame 4a, and the lower frame 4a is inserted into the lower frame 4b.
And the upper frame 4c cannot be moved in the horizontal direction.

Next, when an earthquake occurs, the vibration detector 44 senses and instantaneously cuts off the power supply to the triggers 33 and 33a. Due to this interruption, the excitation of the triggers 33 and 33a is released, the rod body 37 is immersed in the cylindrical body 35 by the force of the spring 36, and the locking of the locking holes 41 and 41a is released, and the rod body 37 is fixed on the installation surface. The intermediate frame 4b can move in the left-right horizontal direction with respect to the lower frame 4a, and the upper frame 4c can move in the front-rear horizontal direction with respect to the intermediate frame 4b via the large- and small-diameter rollers 72 and 43, respectively. The seismic sensor 44 is not attached to each seismic isolation table 4 but is installed at any seismic isolating table or at a suitable place in the room. 33,
33a may be electrically connected. In addition, when ropes are used to keep visitors away from the display case body 1, the vibration detector 44 and the trigger
Without providing 33, 33a, a pin for temporarily fixing the vertically opposed base frames and a locking hole member for engaging and disengaging the pins are provided on the base frame, and the seismic isolation table 4 and the seismic isolation table are provided. The pin may be locked in the locking hole member only when the display case main body 1 is installed on the upper surface 4, and the lock may be released after the installation. In addition, the seismic isolation mechanism 7 has large and small-diameter rollers 72 and 43 in which the intermediate frame 4b is in the front-rear horizontal direction with respect to the lower frame 4a, and the upper frame 4c is in the horizontal direction with respect to the intermediate frame 4b. It may be configured so as to be movable through the interface.

When the lower frame 4a reciprocates in the vibration direction integrally with the installation surface due to the occurrence of the earthquake, the large and small diameter rollers 72, 73 of the seismic isolation mechanism 7 arranged to be rollable in the vibration direction are moved downward. It rolls in the opposite direction relatively to the underframe 4a. For example, in FIG. 11, a lower guide member integrated with the lower underframe 4a
When 71 moves in the direction of the arrow, the small-diameter roller 73 pressed against the lower guide member 71 is provided with a rotational force in a counterclockwise direction, and the eccentric large-diameter roller 72 tries to rotate integrally in the same direction. . The rotation of the eccentric large-diameter roller 72 is not performed around the center of the roller, but the center of the large-diameter roller 72 is centered on the contact point of the outer peripheral surface in contact with the upper guide member 70 in the vibration direction of the lower guide member 71. It can swing.

Accordingly, the amount of horizontal movement of the upper guide member 70 due to the vibration is extremely small, and the horizontal vibration is attenuated and absorbed through the large and small diameter rollers 42 and 43. This suppresses the swing of the display article mounting base plate 2 supported by the shaking table 4 and the lower underframe in the front-rear and left-right directions. That is, the seismic isolation mechanism 7 interposed between the lower underframe 4a and the intermediate underframe 4b, and the seismic isolation mechanism 7 interposed between the intermediate underframe 4b and the upper underframe 4c are arranged orthogonally to each other. Therefore, the vibration can be prevented from being transmitted to the display article mounting base plate 2 side by these vertical seismic isolation mechanisms 7 even in the case of vibrations in front, rear, left and right, and in all directions.

The large and small diameter pinions 74 and 75 provided integrally with the large and small diameter rollers 72 and 73 are engaged with racks 77 and 79 provided on the upper and lower guide members 70 and 71, respectively. The large and small diameter rollers 72 and 73 of all the seismic isolation mechanisms 7 are rotated by integrally rotating with the small and large diameter rollers 72 and 73 to prevent the large and small diameter rollers 72 and 73 from slipping against the upper and lower guide members 70 and 71, respectively. It rotates at the same rolling speed.

Further, the viscous oils 27 and 30 in the groove members 26 and 29 provided in the lower frame 4a and the intermediate frame 4b in parallel to the respective moving directions are provided with the intermediate frame 4b and the upper frame 4c. Since the resistance plates 28 and 32 projecting from are immersed, the horizontal movement of the intermediate underframe 4b and the upper underframe 4c is absorbed and attenuated by the viscous oils 27 and 30, respectively, after the earthquake has left. Is to quickly and surely return the intermediate frame 4b and the upper frame 4c which has received the display article mounting base plate 2 to the original positions on the lower frame 4a.

The displacement in the horizontal direction required to respond to the vibration when a huge earthquake occurs is at most 30 to 40 cm, so that at least the displacement between the upper and lower underframes is large and small. The diameters of the rollers 72 and 73 are set. In this case, the rolling angle of the large-diameter roller 72 must be 180 degrees or less in order to generate the above-mentioned resistance. Therefore, when the large and small diameter rollers 72, 73 roll by half a circumference, the relative horizontal movement amount between the upper and lower underframes is the sum of the half circumferences of these rollers 72, 73. The diameters of the large and small diameter rollers 72 and 73 corresponding to the amount can be easily set.

When the seismic isolation table 4 is to be inspected or replaced, the cover 85 of the lifting mechanism 8 provided on both sides of the lower surface of the seismic isolation table 4 to support the entire load other than the display case body 1. Is lowered by operating the handle as described above, and then may be removed from the gap 3 between the floor surface W1 and the display article mounting base plate 2. Specifically, first, the lifting mechanism 8a in the fixing means 9 on both sides of the support beams 6, 6 is operated by the handle to lower the cover 85, so that the horizontal groove member 91 of the fixing means 9 on the seismic isolation table 4 side. When the cover 85 of the lifting mechanism 8 on the seismic isolation base 4 side is lowered by operating the handle after releasing the pinching of the connecting member 24, the seismic isolation base 4 is lowered, and the wheels 10 attached to the lower surface thereof become floor surfaces. While grounding on W1, the supporting beams 6, 6 are also lowered integrally, and the leg members 5 are grounded,
After the display article mounting base plate 2 is supported by the support beams 6, the seismic isolation table 4 may be pulled out from the gap 3.

In the embodiment described above, the display article mounting base plate 2 of the large-scale display case main body 1 having a large width along the wall surface is divided into a plurality of seismic isolation tables 4 and support beams 6, 6. Although the supporting structure is shown, a small rectangular display article mounting base plate 2 ′ disposed at the lower end of a single narrow display case main body 1 ′ may be supported by the seismic isolation table 4. Good. In this case, the display article mounting base plate 2 'is supported only by the seismic isolation table 4 without using the support beams 6, 6. That is, as shown in FIG. 18, a single narrow display case main body 1 'is fixed by a wall W similarly to the sectional view of FIG. 2, and a small plate rectangular shape serving as a bottom plate of the display case main body 1' is provided. Display table 2 '
In the structure separated from the display case main body 1 ', the leg members 5' and 5 'are integrally suspended on both lower surfaces of the display article mounting base plate 2' and the lifting mechanism 8 is provided on both lower surfaces. The seismic isolation table 4 to which the lifting mechanism 8, 8 having the same structure as that of the above is attached or disposed is inserted into the gap 3 between the display article mounting base plate 2 'and the floor surface W1 so as to be freely drawn out. It has a structure.

Accordingly, when the covers 85 of the both-side lifting mechanisms 8, 8 are raised by operating the handle, the seismic isolation table 4 is lifted, and the upper surface of the upper underframe 4c is brought into contact with the lower surface of the display article mounting base plate 2 '. From this state, the seismic isolation table 4 is further lifted by the lifting mechanism 8
When this is lifted, the wheels 10 attached to the lower surface of the seismic isolation table 4 are lifted, and the display article mounting base plate 2 'is lifted, so that both side leg members 5' and 5 'are separated upward from the floor surface W1.

In this state, the display article mounting base plate 2 ′ is supported on the floor surface W 1 by the both-side lifting mechanisms 8, 8 via the seismic isolation table 4. Exhibit article mounting base plate by the same action explained in the example
Suppresses 2 'shaking. When the seismic isolation table 4 is to be inspected or replaced, the lifting mechanisms 8, 8 on both sides are lowered by operating the handle, and the leg members 5 ', 5' of the display article mounting base plate 2 'are grounded on the floor surface W1. This allows the display article mounting base plate 2 'via the leg members 5', 5 '.
Then, the seismic isolation table 4 may be pulled out by the rolling of the wheels 10 that are grounded on the floor surface W1.

In each of the embodiments described above, the lifting mechanisms 8 and 8a are, as shown in FIG. 19, movable front and rear inclined tables inclined downward from the front and rear ends toward the facing end surfaces.
Wedge members 83 'and 84' are slidably disposed on 81 'and 82', respectively. A horizontal cover 85 is placed between these wedge members, and the wedge members 83 'and 84' penetrate the front and rear movable inclined tables 81 'and 82'. Screw rods formed on the left and right screw holes, the screw directions of the front half and the rear half screw into the left and right screw holes provided.
The handle 86 is detachably attached to the front end of the screw rod 86, and the front and rear movable inclined tables 81 'and 82' are moved in the front and rear direction by rotating the handle 87. The cover 85 may be vertically moved up and down through the wedge members 83 'and 84'.

In addition to the lifting mechanism 8, 8a, a lifting mechanism having another structure may be used. For example, the leg members 5 and 5 'of the display article mounting base plate are configured to be extendable and retractable by jacks or the like, and the leg members 5 and 5' are extended to lift the display article mounting base plates 2 and 2 '. The base plate 2,
The distance between the floor 2 and the floor surface W1 is increased so that the seismic isolation table 4 can be inserted into and removed from the gap, and after the insertion, the leg members 5, 5 'are contracted, so that the display article mounting base plates 2, 2 are contracted. May be supported on the seismic isolation table 4 and the lower surface of the seismic isolation table 4 may be installed on the floor surface W1 via appropriate leg pieces.

[0054]

As described above, according to the display device seismic isolation device of the present invention, the display case installed on the floor of the building constitutes the display case body and the bottom plate of the display case body. The display case main body is fixed to the wall of the building, while the display object mounting base plate is horizontally movably separated from the display case main body. The mounting base plate can be supported on the floor via leg members, and the base member having a seismic isolation mechanism with a seismic isolation mechanism interposed in the gap between the seismic base and the floor surface. The display article mounting base plate is received by the above-mentioned seismic isolation table on the floor surface without supporting the display object mounting base plate on the floor, so the display case body shakes integrally with the building when an earthquake occurs Even the exhibition that is the bottom plate of the display case body The product mounting plate is separated from the display case body and supported on the floor via the seismic isolation table with the leg members floating, so that the vibration is applied to the display table by the seismic isolation table. Transmission can be suppressed,
It is possible to prevent display articles such as various art objects displayed on the display article mounting base plate from being damaged.

Further, since a lifting mechanism is provided between the base and the floor to move the upper surface of the base to and away from the lower surface of the display table. Can lift the seismic isolation table by the lifting mechanism and securely support the display article mounting base plate via the seismic isolation table.
If the seismic isolation table is lowered by the lifting mechanism, the leg members can touch the floor and support the display table on the floor via the leg members. In this state, only the seismic isolation table is displayed. It can be easily pulled out from the gap between the article mounting base plate and the floor surface for inspection and replacement. In addition, the gap between the display article mounting base plate and the floor can be made small, so that a display case with good appearance can be provided.

In the seismic isolation table, a lower frame, an intermediate frame, and an upper frame are stacked so as to be movable in a plane direction, and small-diameter rollers are provided at several places between the lower frame and the intermediate frame. The small-diameter roller is brought into contact with the lower underframe side and the large-diameter roller is brought into contact with the intermediate frame side by interposing a seismic isolation mechanism in which a large-diameter roller eccentric to this small-diameter roller is integrally provided. On the other hand, the same seismic isolation mechanism as the above-mentioned seismic isolation mechanism is interposed in several places between the intermediate underframe and the upper underframe in the direction orthogonal to the seismic isolation mechanism, and the small-diameter roller is placed on the intermediate platform. The large-diameter roller is rolled in contact with the upper underframe side while rolling in contact with the frame side. The display case mounted on the upper underframe absorbs the vibration energy through In which it is possible to significantly attenuate the shaking of the body.

Further, when the display case main body has a long structure along the wall surface, the display article mounting base plate is formed to be long in the shape of a flat band along the lower end of the wall surface. The above-mentioned seismic isolation table is interposed at regular intervals in the length direction of the base plate in the gap between the long base plate and the floor surface, and is integrally fixed to the base plate between adjacent seismic isolation tables and on the lower surface. By providing a support beam integrally provided with the above-mentioned leg members and having a structure in which the opposite ends of the support beam and the upper underframe of the seismic isolation table are detachably fixed, a long flat strip-shaped display article can be mounted. Even if the table is a table, the vibration can be suppressed by the plurality of seismic isolation tables 4 and the support beams, and a large number of display articles placed in parallel on the display article table can be stably supported. You can keep.

The lower frame and the intermediate frame of the seismic isolation table, and the intermediate frame and the upper frame are connected by a rod, which is a movable iron core of the solenoid, and a cylinder for inserting and removing the rod. The solenoid is electrically connected to the vibration sensor, and the rod body is detached from the cylinder by the detection of the vibration sensor. Even if an unexpected external force acts on the display case main body, the display case main body can be prevented from being perturbed, and the seismic isolation table can be automatically and quickly operated in the event of an earthquake.

[Brief description of the drawings]

FIG. 1 is a simplified front view of a display case,

FIG. 2 is a simplified enlarged longitudinal side view thereof,

FIG. 3 is a simplified front view of the seismic isolation device supporting the display article mounting base plate,

FIG. 4 is a simplified plan view thereof,

FIG. 5 is a simplified longitudinal front view of the base isolation table,

FIG. 6 is a simplified vertical sectional front view when the lower frame is shaken,

FIG. 7 is a plan view of a lower underframe of the base isolation table,

FIG. 8 is a plan view of an intermediate underframe of the base isolation table,

FIG. 9 is a plan view of an upper underframe of the base isolation table,

FIG. 10 is a longitudinal front view of the seismic isolation mechanism,

FIG. 11 is a left side view thereof,

FIG. 12 is a right side view thereof,

FIG. 13 is a simplified vertical sectional view of a trigger,

FIG. 14 is a partially cut-away simplified side view of a lifting mechanism,

FIG. 15 is a longitudinal sectional front view of the AA line,

FIG. 16 is a vertical sectional front view of the BB line,

FIG. 17 is a partially cutaway enlarged front view showing the connecting member on the seismic isolation table side and the fixing means on the lower underframe side;

FIG. 18 is a simplified front view showing another embodiment of the present invention;

FIG. 19 is a simplified longitudinal side view showing another embodiment of the lifting mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Display case main body 2 Display article mounting base plate 3 Gap part 4 Seismic isolation table 5 Leg member 6 Support beam 7 Seismic isolation mechanism 8 Lifting mechanism 9 Fixing means 10 Wheel

────────────────────────────────────────────────── ─── Continued on the front page (72) Kunio Hayakawa, Inventor Kunio Hayakawa 2-2-2, Matsuzaki-cho, Abeno-ku, Osaka-shi Okumura Gumi Co., Ltd. (56) References Japanese Utility Model 1987-1986 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) A47F 3/00 F16F 15/00-15/36 A47B 97/00

Claims (7)

(57) [Claims] A display case installed on a floor of a building comprises a display case main body and a display article mounting base plate constituting a bottom plate of the display case main body, and the display case main body is fixed to a wall surface of the building. On the other hand, the display article mounting base plate is separated so as to be movable in the horizontal direction with respect to the display case main body. In the normal state, a seismic isolation table with a seismic isolation mechanism is interposed in the gap between the mounting table and the floor surface. The above-mentioned seismic isolation table receives the display article mounting base plate, and further raises and lowers the upper surface of the seismic isolation table between the seismic isolation table and the floor surface with respect to the lower surface of the display article mounting base plate. The display mechanism of the display case in which the upper mechanism is arranged Seismic isolation device. 2. The seismic isolation table includes a lower frame, an intermediate frame, and an upper frame which are movably mounted on each other in a plane direction, and a small-diameter roller is provided at several positions between the lower frame and the intermediate frame. The small-diameter roller is brought into contact with the lower underframe side and the large-diameter roller is brought into contact with the intermediate frame side by interposing a seismic isolation mechanism in which a large-diameter roller eccentric to this small-diameter roller is integrally provided. On the other hand, the same seismic isolation mechanism as the above-mentioned seismic isolation mechanism is interposed in several places between the intermediate underframe and the upper underframe in the direction orthogonal to the seismic isolation mechanism, and the small-diameter roller is interposed. The upper frame of this seismic isolation table is integrated with the lower surface of the above-mentioned display article mounting base plate. It can move freely without sticking to the bottom, and multiple casters and seismic isolation bases can be moved up and down on the lower surface of the lower underframe 2. The seismic isolation device for displayed articles in the display case according to claim 1, further comprising a lifting mechanism for adjusting. 3. A rod between the lower frame and the intermediate frame and between the intermediate frame and the upper frame of the seismic isolation table are connected by a rod, which is a movable iron core of the solenoid, and a cylinder for inserting and removing the rod. 3. The display article in the display case according to claim 1, wherein the solenoid is electrically connected to the vibration sensor, and the rod is detached from the cylindrical body by the detection of the vibration sensor. Seismic isolation device. 4. The display article mounting base plate is formed in a flat strip shape along the lower end of the wall surface of the building, and a wide display case main body fixed to the wall surface is disposed on the base plate while the flat strip shape is provided. The above-mentioned seismic isolation table is interposed at appropriate intervals in the longitudinal direction of the base plate in the gap between the long base plate and the floor surface, and is integrally fixed to the base plate between adjacent seismic isolation tables and the lower surface A supporting beam provided integrally with the leg member, and an opposite end of the supporting beam and an upper frame of the seismic isolation table is detachably fixed. Item 4. A seismic isolation device for display articles in the display case according to Item 2. 5. A fixing means between the opposite ends of the support beam and the upper frame of the seismic isolation table, wherein a groove having a U-shaped cross section is provided at an end of the support beam in the front-rear direction, and a lift is provided in the groove. While the upper mechanism is provided, the tip of a connecting member projecting horizontally from the end of the upper underframe of the seismic isolation table is interposed in the groove, and the lifting mechanism and the flange of the groove are provided by the lifting mechanism. The seismic isolation device for an exhibit in a display case according to claim 4, wherein the distal end of the connecting member is sandwiched between the inner surface and the inner surface. 6. A lifting mechanism, wherein a wedge member is slidably disposed on a fixed front and rear inclined table which is inclined upward from a front and rear end toward an opposite end face, and a front and rear wedge member is provided between these wedge members. A horizontal cover that disables horizontal movement with respect to the fixed inclined table is put on, and the screw rods formed in the screw rod portions in which the screw directions of the front half and the rear half are opposite to each other are threaded through both wedge members, The seismic isolation device for display articles in a display case according to claim 1 or 5, wherein a handle body is detachably attached to a front end of the screw bar. 7. A lifting mechanism, wherein a wedge member is slidably disposed on a movable front and rear inclined table which is inclined downward from an anteroposterior end toward an opposing end face, and a horizontal member is provided between the wedge members. The cover is covered and the front and rear movable inclined tables are threaded with screw rods formed in screw rods with the screw directions of the front half and the rear half opposite to each other, and the handle body is detachably attached to the front end of the screw rod. The seismic isolation device for display articles in a display case according to claim 1 or 5, wherein the display article is attached.