JP4472136B2 - Exhibition base - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an exhibition base for exhibition, and in particular, for an exhibition constructed so as to establish a simple form and not impair the beauty while adding a damper characteristic capable of easily controlling a desired seismic isolation action and its operating state. Regarding the base isolation table.
[0002]
[Prior art]
In recent exhibition pedestals, seismic isolation devices are used inside the exhibition pedestals to avoid the exhibits from being damaged by earthquakes. The seismic isolation device for the exhibition pedestal is installed between the support base and the display-mounted base, and supports the exhibits placed on the display base. Even then, the exhibition base on which the exhibition is placed is not moved immediately by inertia force, but the vibration cycle is prolonged, thereby preventing the resonance state with the exhibition and exhibiting external inputs such as earthquakes. The response acceleration of the object mounting pedestal is reduced to reduce the energy transmitted to the exhibit.
[0003]
On the other hand, in addition to the seismic isolation function for an earthquake or the like, the seismic isolation mechanism of the display pedestal is also required to have a function of avoiding this from the swing that the viewer or the like unconsciously touches the exhibit.
[0004]
These required performances are related to the horizontal displacement and response acceleration of the exhibition base, but considering that the horizontal displacement and response acceleration are solved by the resistance of the damper, the frictional resistance of the damper When the force is increased, the horizontal displacement is reduced, but the response speed is increased. Conversely, when the frictional resistance force of the damper is decreased, the response speed is decreased, but the horizontal displacement is increased. In order to keep the displacement and response acceleration within the required ranges, it is necessary to examine the frictional resistance of the damper in detail, which is a major design theme.
[0005]
In addition, the seismic isolation table for exhibition itself is also displayed according to the exhibition, and it is also a conspicuous one, so that it is as simple and compact as possible as a structural requirement. Is required.
[0006]
As shown in FIG. 7 as an example of a seismic isolation table 30 for an exhibition, the conventional seismic isolation table for receiving the above-mentioned requirements has a seismic isolation device 33 installed on a bearing surface 31 with a support plate 32 interposed therebetween. In addition, viscous dampers 40A and 40B are arranged to limit the start-up and vibration of the seismic isolation device 33, and the exhibit-mounted base 34 on which an exhibit is placed is placed on the upper surface of the seismic isolation device 33. Is provided.
[0007]
These seismic isolation bases 30 are configured so as to be compatible with all horizontal directions by overlapping the unidirectional seismic isolation devices 33A and 33B in a vertically orthogonal state as the seismic isolation device 33. Yes.
[0008]
The unidirectional seismic isolation device 33 forms a concave arc-shaped roller guide surface 37 that draws a cosine curve on the opposing surfaces of a pair of upper and lower cosine rails 36 </ b> A, 36 </ b> B, and a plurality of rollers 38 between the roller guide surfaces 37. , 38 are configured to roll freely.
[0009]
When the bearing surface 31 moves in the horizontal direction during an earthquake, the pair of upper and lower cosine rails 36 </ b> A and 36 </ b> B start to shift in directions opposite to each other because the roller 38 rolls on the roller guide surface 37. The deviation occurs according to the state in which the roller 38 rolls along the roller guide surface 37 of each cosine rail 36A, 36B. When the roller 38 approaches the end of the roller guide surface 37, the roller 38 becomes a concave arc cosine. To move along the curve, the upper cosine rail 36A is lifted upward.
[0010]
The lifting force applied to the roller 38 and the cosine rail 36 </ b> A acts on the lifting force, and a force for restoring the displacement acts on each lifting force. The seismic devices 33A and 33B exhibit a restoring force.
[0011]
Therefore, when the horizontal force at the time of the earthquake is settled, the pair of upper and lower cosine rails 36A and 36B converges the vibration caused by the shift, and exhibits the seismic isolation effect without moving the exhibit placed on the exhibit mount base. is doing.
[0012]
On the other hand, each viscous damper 40A, 40B disposed in each unidirectional seismic isolation device 33A, 33B has a viscous body 42 in a rectangular groove container 41 disposed along the length direction of the lower cosine rail 36B. The resistor plate 43 is housed and immersed in an arbitrary point in the longitudinal direction of the upper cosine rail 36A in the viscous body 42.
[0013]
Thereby, when relative movement occurs between the upper and lower cosine rails, each viscous damper 40 generates a viscous resistance, thereby exhibiting a function of suppressing an excessive movement displacement of the seismic isolation device.
[0014]
However, since each viscous damper 40 uses a liquid viscous material, it is forced to have a large structure, and is a heavy structure that is structurally bulky.
[0015]
Furthermore, even in the operating state, the damping force increases as the moving speed increases. However, since the damping function decreases in the vicinity of the speed 0, viewers and the like can exhibit it. When a small force that touches unconsciously acts on the display base, the problem is that the function of suppressing the initial start of the display base is insufficient.
[0016]
As described above, conventional seismic isolation tables for exhibitions are in a situation where large heavy objects have to be formed because of the use of viscous dampers. He was asked to solve the problem by presenting a difficult situation within the required range, and as a result, an improvement in aesthetics was sought.
[0017]
[Problems to be solved by the invention]
The present invention is proposed in order to solve the problems in the functional and structural aspects of the above-described base isolation table for exhibition, and maintains the base isolation function with the function of suppressing the initial start. On the other hand, we are providing a seismic isolation table for exhibitions that is compact and lightweight in terms of structure and that shows its beauty.
[0018]
[Means for Solving the Problems]
The display base for an exhibition according to the present invention is basically a base isolation base configured by disposing a base isolation mechanism composed of a plurality of rollers between a support base and an exhibit mounting base. A plurality of rollers in the seismic isolation mechanism are placed between a pair of upper and lower rails placed between the board base and the exhibit mounting platform so that the loading load of the exhibit mounted on the exhibit mounting platform is applied to these rollers and rails. The roller connecting plate is supported by a roller connecting plate arranged on both sides of the roller with a bearing portion constituted by a cylindrical hole so that the rolling and movement of these rollers are performed integrally. The friction damper mechanism is equipped between the rotating shaft and the bearing part. Specifically, the friction resistance of the friction damper mechanism can be adjusted by adjusting the tightening force of each roller against the rotating shaft. To do and on Is characterized in that by stacked seismic isolation mechanism in the perpendicular direction correspond to all directions.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
The seismic isolation table for exhibition according to the present invention is configured by arranging a seismic isolation mechanism composed of a plurality of rollers between a base plate and an exhibition-mounting base, and between the base plate and the exhibition-mounting base. between the upper and lower pair of rails arranged on a plurality of rollers in aseismatic means, on the mounting load of the exhibits, which are Ueno exhibition Butsujo mounting pedestal is interposed to join these rollers and the rails, the axis of rotation of each roller , So that the rolling and movement are performed integrally, the roller connecting plate disposed on both sides of the roller is supported by the bearing portion formed by the cylindrical hole and coupled by the roller connecting plate, and the rotating shaft and the bearing portion Equipped with an adjustable friction damper mechanism. Embodiments of the present invention will be described below with reference to the drawings.
[0020]
FIG. 1 is a perspective view of a seismic isolation table for display according to the present invention, which is shown in a state where an outer panel placed around a base plate and an exhibition base is omitted in order to clearly indicate the seismic isolation mechanism. Yes.
[0021]
The seismic isolation table 1 for display in the present embodiment is a seismic isolation system having a plurality of rollers interposed between a support base 2 and an exhibit-mounted base 3 and a pair of upper and lower cosine rails as shown in the figure. The details of the mechanism 4 will be described in detail with reference to the plan views and the side views of FIGS.
[0022]
Even if a horizontal force due to an earthquake is applied by the above configuration, the seismic isolation table for display according to the present invention can be removed by the action of the seismic isolation mechanism 4 disposed between the support base 2 and the exhibition mount base 3. By absorbing, it is prevented that the exhibit placed on the exhibit mounting base 3 is destroyed.
[0023]
In addition, since the initial start of the seismic isolation mechanism 4 is suppressed, the display-mounted base 3 does not swing due to a small external force that occurs when viewers unconsciously touch the display. It is avoided that the exhibit placed on the exhibit mount base 3 is destroyed by overturning.
[0024]
As shown in the plan view of FIG. 2, the support base 2 is an L-shaped steel that is arranged in parallel to form long sides 5 and 5, and an L-shaped steel that is arranged orthogonally to form short sides 6 and 6. Are combined together to form the gantry frame 7. Inside the gantry frame 7, support frames 8 and 8 for attaching the seismic isolation mechanism 4 and a support frame 9 arranged at an intermediate portion for reinforcing the same are arranged, and four corners of the gantry frame 7 are arranged. In the middle part of the long side, six adjusting leg members 10 that support the gantry frame 7 and establish the level thereof are arranged.
[0025]
The display-mounted base 3 is provided on the unidirectional seismic isolation device 4B disposed in the upper stage, which will be described later, with the description omitted, and the upper cosine rail 12A of the unidirectional seismic isolation device 4B and It is comprised in the range of the plane formed by the cosine rail connecting members 13 and 13 connecting the cosine rails 12A and 12A on both sides.
[0026]
On the periphery of the support base 2 and the upper surface and the periphery of the exhibition-mounting pedestal 3, an exterior plate displayed in phantom lines is arranged, thereby simplifying the exhibition base 1 as a single unit. It plays a role to summarize the state.
[0027]
The seismic isolation mechanism 4 includes a unidirectional seismic isolation device 4A installed on the support frames 8 and 8 of the gantry frame 7, and a unidirectional seismic isolation installed on the unidirectional seismic isolation device 4A orthogonal to the unidirectional seismic isolation device 4A. The seismic device 4B is displayed on both side views of the seismic isolation table for display shown in FIGS.
[0028]
As is apparent from the side view of FIG. 3, the unidirectional seismic isolation device 4 </ b> A has two upper cosine rails 11 </ b> A disposed on the support frames 8, 8 of the gantry frame 7, while facing the upper cosine rails 11 </ b> A. The lower cosine rails 11B and 11B and the rollers 14 and 14 disposed between the lower cosine rails 11B and 11B, which are divided into pieces and are placed on the base plate 11C and coupled to the support frames 8 and 8, respectively. The rollers 14 and 14 are connected by roller connecting plates 15 and 15 arranged on both sides, and are configured so that rolling and movement are performed integrally.
[0029]
A concave arc-shaped roller guide surface 16 that draws a cosine curve is formed on both ends of the upper cosine rail 11A and the lower cosine rail 11B, and the roller 14 is disposed between the opposing roller guide surfaces 16 and 16, It is configured so that it can easily roll according to the displacement of the upper and lower cosine rails.
[0030]
As a result, even if the base table 2 moves horizontally in the direction of the unidirectional seismic isolation device 4A in the event of an earthquake, the display-mounted base 3 is not immediately moved by the inertial force and the rolling of the roller 14. The vibration cycle can be extended for a long time, and the response acceleration of the pedestal on the exhibit to external inputs such as earthquakes can be reduced while preventing resonance with the exhibit, thereby reducing the energy transmitted to the exhibit. ing.
[0031]
In addition, the upper and lower cosine rails 11A and 11B start to shift in opposite directions because the roller 14 rolls on the roller guide surface 16 when the support base 2 moves in the horizontal direction during an earthquake. The deviation is performed according to a state in which the roller 14 rolls along the roller guide surface 16 of each cosine rail 11A, 11B.
[0032]
Therefore, when the roller 14 approaches the end of the roller guide surface 16, the roller 14 is pushed upward along the roller guide surface 16 lifted at both ends to lift the upper cosine rail 11A upward.
[0033]
The lifting load applied to the roller 14 and the cosine rail 11A acts on the lifting force, and a force for restoring the deviation acts.
[0034]
For this reason, a restoring force is generated in the unidirectional seismic isolation device 4A, and when the horizontal force at the time of the earthquake is settled, the pair of upper and lower cosine rails 11A and 11B will vibrate due to the displacement. The seismic isolation effect is exerted so as not to move the exhibits on the pedestal on the display.
[0035]
On the other hand, the unidirectional seismic isolation device 4B installed on both ends of the unidirectional seismic isolation device 4A in an orthogonal state is a pair of upper and lower cosines facing each other, as is apparent from the side view of FIG. It is comprised from the rails 12A and 12B and the rollers 14 and 14 arrange | positioned between them. The rollers 14 and 14 are connected by roller connecting plates 17 and 17 arranged on both sides, and are configured such that rolling and movement are performed integrally.
[0036]
Concave arc-shaped roller guide surfaces 16 that draw a cosine curve are formed at both ends of the upper and lower cosine rails 12A and 12B. It is configured to be easily rollable according to the deviation.
[0037]
Therefore, even when the support base 2 moves horizontally in the direction of the unidirectional seismic isolation device 4B in the event of an earthquake, it functions in the same manner as the unidirectional seismic isolation device 4A, reducing the energy transmitted to the exhibit. The seismic isolation effect by the convergence of vibration is possible.
[0038]
Next, the friction damper mechanism in the seismic isolation mechanism will be described with reference to FIGS.
[0039]
In the design of a base for an exhibition base, the conditions set as prerequisites for the required performance are the maximum weight (mg) and horizontal displacement (δ) of the overlaid objects to be displayed, and vibration analysis is performed according to these values. An appropriate friction coefficient (μ ₀ ) is set so as not to exceed the horizontal movement amount with respect to the maximum weight.
[0040]
As a result, the appropriate frictional resistance force (F ₀ ) with respect to the maximum weight is set as F ₀ = μ ₀ mg. In this range, the maximum weight of the display base for the exhibition is considered. The setting range of the weight (DL) and the displayed exhibition weight (LL1), the friction resistance force (F) for allowing the displayed weight (LL1) to be mounted under the weight (DL) of the displayed exhibition mount base, Adjustment of the friction coefficient (μ) is performed.
[0041]
That is, the frictional resistance force (F) in the display base for display is F = μ (DL + LL1), and therefore the maximum weight of the mounted object is determined after the weight (DL) of the displayed object mounting base is determined structurally. Assuming that the frictional resistance (F) is within the appropriate frictional resistance (F ₀ ) within the range of weight (mg), the following relational expression can be obtained between the weight of the displayed article (LL1) and the friction coefficient (μ). It is formed.
[0042]
μ = (F ₀ / DL) × 1 / (1 + LL1 / DL)
As is clear from the relational expression, when the exhibition weight (LL1) to be mounted is scheduled, the relationship between the weight of the exhibition mount base (DL) and the displayed exhibition weight (LL1) is determined. The necessary coefficient of friction (μ) for proper operation of the shaking table can be obtained.
[0043]
In addition, in order to determine the necessary coefficient of friction (μ), it is also necessary to consider that the displayed exhibits do not fall over due to swinging. For this examination, it is necessary to consider the aspect ratio (As) of the exhibits to be mounted and the response acceleration (α) of the base isolation table for exhibition.
[0044]
The relationship between the aspect ratio (As) and the friction coefficient (μ) is the ratio of the input acceleration (βg), which is β times the gravitational acceleration, to the response acceleration (α) of the display base. Considering what can be considered, it is possible to calculate using the calculation formula that associates the friction force and the weight, and according to this, the friction coefficient (μ) for preventing the displayed exhibit from falling is 1 / ΒAs or less is required.
[0045]
Therefore, the adjustment and setting of the friction damper mechanism in the seismic isolation mechanism is set as the final numerical value of the coefficient of friction (μ), taking into consideration each of the above situations, but as in the present invention, Control the friction coefficient and frictional resistance of the friction damper mechanism installed between the rotating shaft of each roller and the bearing part in the seismic isolation mechanism in accordance with the exhibits to be displayed, without causing the exhibits to fall over. It is possible to set so as not to exceed the horizontal movement amount.
[0046]
FIG. 5 is an exploded view showing a specific embodiment for adjusting the friction coefficient of the friction damper mechanism, and FIG. 6 is a perspective view (a) and a perspective view (b) of the perspective view (a) of the friction damper mechanism. )-(B) arrow view (b) and perspective view (c)-(c) arrow view (c).
[0047]
As shown in the exploded view of FIG. 5, the unidirectional seismic isolation device 4B (4A) equipped with the friction damper mechanism 20 includes a pair of upper and lower cosine rails 12A and 12B facing each other as described above, and a space therebetween. It is comprised from the rollers 14 and 14 arrange | positioned in this, and the rollers 14 and 14 are comprised by the roller connection plates 17 and 17 arrange | positioned on both sides, and are comprised so that rolling and a movement may be performed integrally.
[0048]
A concave arc-shaped roller guide surface 16 that draws a cosine curve is formed at both ends of the upper and lower cosine rails 12A and 12B. The roller 14 is disposed between the opposing roller guide surfaces 16 and 16, and the upper and lower cosine rails. According to the concave arc-shaped roller guide surface 16, the roller guide surface 16 can be easily rolled.
[0049]
Each roller 14 has a rotating shaft 18 supported by a bearing portion 19 of a roller connecting plate 17, and a friction damper mechanism 20 capable of adjusting a frictional resistance force between the rotating shaft 18 and the bearing portion 19. It is interposed and prevented from coming off by an O-ring 21 or the like.
[0050]
As shown in FIG. 6, the bearing portion 19 that supports the roller 14 includes cylindrical holes arranged at both ends of the roller connecting plate 17, and the cylindrical hole opens on the end side of the roller connecting plate 17. A gap 22 is provided. The width of the gap 22 can be adjusted by a screwing mechanism of a screw 23 formed on the end side of the bearing portion 19, and the diameter of the bearing portion 19 is reduced by tightening the rotation shaft 18 by reducing the width. It is configured as follows.
[0051]
As shown in FIG. 6 (b), the screw 23 is screwed in such a manner that a hole 24 is formed on one end side of the roller connecting plate 17 constituting the gap, and the other end side of the roller connecting plate 17 is formed. The tap hole 25 is provided, and the frictional resistance of the friction damper mechanism 20 can be easily controlled by adjusting the screwing of the screw 23.
[0052]
The friction damper 20 interposed between the rotating shaft 18 and the bearing portion 19 can be used without particular limitation as long as it is made of a material that exhibits a frictional force. Expanded metal is adopted because of wear resistance and ease of adjustment, and this is processed into a stretchable cylindrical shape with a hook as shown in FIG. It is interposed between.
[0053]
As described above, in the seismic isolation table for display according to the present invention, by adjusting the frictional resistance of the friction damper mechanism 20 interposed between the rotary shaft 18 and the bearing portion 19, Since the start-up is suppressed, the display-mounted base 3 functions by preventing the swing of the display-mounted base 3 by a small external force generated by the viewer or the like unconsciously touching the display. This prevents the exhibits placed on the top from being destroyed.
[0054]
As described above, the present invention has been described in detail on the basis of the embodiment. However, the seismic isolation table for display according to the present invention is not limited to the above embodiment at all, and its application range and friction damper mechanism are configured. It goes without saying that various changes can be made to the specific structure, type, etc., without departing from the spirit of the present invention.
[0055]
【The invention's effect】
The exhibition base isolation base according to claim 1 is configured by arranging a base isolation mechanism composed of a plurality of rollers between a support base and an exhibit mounting base. A plurality of rollers in the seismic isolation mechanism are interposed between a pair of upper and lower rails arranged between the exhibit mounting pedestal so that the loading load of the exhibit mounted on the exhibit mounting pedestal is applied to these rollers and rails , The rotation shaft of each roller is supported by a roller connecting plate arranged on both sides of the roller with a bearing portion formed by a cylindrical hole so that the rolling and movement of these rollers are performed integrally, and is coupled by the roller connecting plate. Since it is equipped with a friction damper mechanism between the rotating shaft and the bearing part, it maintains a seismic isolation function with a function to suppress initial start-up, while reducing the size and weight of the structure and maintaining its aesthetics. Can It has been effective.
[0056]
The exhibition base isolation table according to claim 2 is characterized in that in the exhibition base isolation table according to claim 1, the friction resistance of the friction damper mechanism is configured to be adjustable. In addition to the function, it has the effect of being able to easily cope with the weight of the exhibits on display.
[0057]
The display base for display according to claim 3 is the display base for display according to claim 1 or 2, wherein the frictional resistance of the friction damper mechanism is adjusted by the tightening force with respect to the rotating shaft of each roller. In addition to the above functions, the seismic isolation table for exhibition is formed in a simple manner to reduce the weight and to prevent the seismic isolation mechanism from being damaged during transportation. ing.
[0058]
The display base isolation table according to claim 4 is the display base isolation table according to any one of claims 1 to 3, characterized in that the base isolation mechanisms are stacked in an orthogonal direction. In addition to the above functions, the effect of being able to place the seismic isolation table for display in all directions is exhibited.
[Brief description of the drawings]
[Fig. 1] Perspective view of the base isolation table for exhibition according to the present invention [Fig. 2] Plan view of the base isolation table for display according to the present invention [Fig. 3] Side view of the base isolation table for display according to the present invention [Fig. FIG. 5 is an exploded perspective view of a single-direction seismic isolation device in the display base isolation table according to the present invention. FIG. 6 is a perspective view of the display base isolation table according to the present invention. Perspective view (a) and (b)-(b) arrow view (b) of perspective view (a) and (c)-(c) arrow view (c) of perspective view (a) of the friction damper mechanism
[Fig. 7] Plan view (a) and plan view (a) of (b)-(b) arrow view of a conventional display base for display
1 Seismic isolation table for exhibition, 2 Base stand, 3 Pedestal on display,
4 Seismic isolation mechanism, 4A, B Single direction seismic isolation device, 5 Long side, 6 Short side,
7 frame, 8, 9 support frame, 10 adjustment leg member,
11A, B cosine rail, 12A, B cosine rail,
13 cosine rail connecting material, 14 rollers,
15, 17 Roller connecting plate, 16 Roller guide surface, 18 Rotating shaft,
19 bearing part, 20 friction damper mechanism, 21 O-ring, 22 gap,
23 screws, 24 fool holes, 25 tap holes,
30 Seismic isolation table for display, 31 Bearing surface, 32 Support plate,
33 Seismic isolation device, 33A, B Unidirectional seismic isolation device,
34 36A Upper cosine rail, 36B Lower cosine rail,
37 Roller guide surface, 38 Roller, 40A, B Viscous damper,
41 groove container, 42 viscous body, 43 resistance plate,

Claims (4)

A seismic isolation base composed of a plurality of rollers and arranged between a support base and an exhibition stand, and placed between the support base and the display base. Between the pair of upper and lower rails, a plurality of rollers in the seismic isolation mechanism are interposed so that the loading load of the exhibition mounted on the exhibition mounting base is applied to these rollers and the rail . The roller connecting plates arranged on both sides of the roller are supported by a bearing portion formed of a cylindrical hole and coupled by the roller connecting plate so that the rolling and movement are performed integrally, and between the rotating shaft and the bearing portion. Seismic isolation table for exhibition, which is equipped with a friction damper mechanism. The seismic isolation table for exhibition according to claim 1, wherein the friction damper mechanism is configured to be capable of adjusting a frictional resistance force. The display base for exhibition according to claim 1 or 2, wherein the frictional resistance is adjusted by a tightening force of each roller with respect to the rotation shaft. The seismic isolation table for display according to any one of claims 1 to 3, wherein the seismic isolation mechanisms are arranged in a stacked manner in an orthogonal direction.

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