JPH0640285Y2 - Seismic isolation support device - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a seismic isolation support device, and more specifically, it exhibits an excellent vibration isolation effect against microvibration and also with a large horizontal load. The present invention relates to a seismic isolation support device that exhibits a high damping effect.

(Prior Art) A seismic isolation support device is provided between a structure and a support that supports the structure.

As a seismic isolation support device, a device shown in a sectional view in FIG. 8 has been put into practical use.

In FIG. 8, reference numeral 81 is a seismic isolation support device, and the seismic isolation support device 81 includes upper and lower mounting members 83 and 85, an elastic support 87 provided between the upper and lower mounting members 83 and 85, and an elastic support. 87, and a plastic plug 89 that is vertically installed inside.

The elastic support member 87 includes thick upper and lower reinforcing plates 91 and 93 located in the upper and lower portions of the plug 89, and a laminated elastic member 95 disposed around the plug 89 between the upper and lower reinforcing plates 91 and 93. Consists of.

The laminated elastic body 95 is integrally formed by alternately stacking the thin-walled reinforcing plates 97 and the thin-walled elastic plates 99, and the upper and lower reinforcing plates 91 and 93 are coupled to the upper and lower mounting members 83 and 85 by dowel pins 101 and 103, respectively.

The seismic isolation support device 81 is attached to the structure S side and the support B side via the upper and lower attachment members 83 and 85, and the horizontal load acting on the structure S due to an earthquake, wind load, or the like is applied to the plug 89 by plasticity. It is designed to be attenuated by deformation resistance.

(Problems to be solved by the invention) According to such a configuration, since the elastic support 87 and the plug 89 are integrated, workability is excellent, but the upper and lower reinforcing plates 91, 9
Since the plug 89 and the elastic support 87 are integrated by 3, the seismic isolation support device 81 has a high initial rigidity and has a drawback that the vibration isolation effect against microvibration is low.

Therefore, in order to reduce the initial rigidity, as disclosed in JP-A-62-228729, the upper reinforcing plate is separated upward from the upper end of the plug, and an elastic body is provided between the upper reinforcing plate and the upper end of the plug. Those provided are also proposed.

However, in such a configuration, although the initial rigidity can be lowered, the load is always received by the elastic body, so when a particularly large horizontal load is applied, this load is indirectly transmitted to the plug through the elastic body, There is a drawback that the plastic deformation resistance of the plug cannot be effectively used.

The present invention has been devised in view of the above circumstances, and an object of the present invention is to provide an excellent vibration isolation effect against minute vibrations and an excellent damping effect even against a large horizontal load. It is to provide a seismic isolation support device.

(Means for Solving the Problems) A configuration of the present invention for achieving the above-mentioned object will be described with reference to FIGS. 1 to 3 corresponding to the embodiments.

The present invention is a seismic isolation support device 1 provided between a structure S and a support B that supports the structure S, and includes an upper mounting member 3 mounted on the structure S side and a support B side mounted on the support B side. A lower mounting member 5, a lower elastic support 7 disposed on the lower mounting member 5, and an upper elastic support 9 disposed between the lower elastic support 7 and the upper mounting member 3. The lower elastic support 7 is provided with a plastic plug 11 which is vertically provided in the lower elastic support 7 so as to extend vertically above and below the lower elastic support 7. Reinforcement plates 13 and 15 and a laminated elastic body 17 formed by superposing a thin-walled reinforcement plate 25 and a thin-walled elastic plate 27 arranged around the plug 11 between the upper and lower reinforcement plates 13 and 15. The upper elastic support member 9 is configured by stacking a thin-walled reinforcing plate 31 and a thin-walled elastic plate 33, and the upper mounting member 3 includes the upper reinforcing plate. It is characterized in that a flange 37 is provided on the outer periphery of 13 at a predetermined interval.

(Operation) Microvibration is absorbed by the shear deformation of the upper elastic support 9, as shown in FIG.

That is, the microvibration is not transmitted to the plug 11, so that the initial rigidity of the seismic isolation support device 1 can be lowered, and an excellent vibration isolation effect is exhibited against the microvibration.

When an excessive horizontal load such as an earthquake is applied, the flange 37 and the outer periphery of the upper reinforcing plate 13 come into contact with each other, and the structure S side and the upper reinforcing plate 13 are in contact with each other.
Are connected and the load is directly transmitted to the plug 11.

Therefore, the plastic deformation resistance of the plug 11 can be effectively utilized, and an excellent damping effect is exerted against an excessive horizontal load.

In addition, as shown in FIGS. 4 and 5, the upper elastic support 9
If a hole 61 extending in the vertical direction is formed in the upper elastic support body 9 as shown in FIGS. The initial rigidity and the like can be easily set to desired values.

(Embodiment) An embodiment of the present invention will be described below with reference to the accompanying drawings.

First, the first embodiment will be described. FIG. 1 is a cross-sectional view of a seismic isolation support device according to the first embodiment, FIG. 2 is a cross-sectional view of the same and attached state, and FIG. The same sectional drawing of a state is shown.

Reference numeral 1 denotes a seismic isolation support device according to the present invention. The seismic isolation support device 1 includes an upper attachment member 3 attached to a structure S side, a lower attachment member 5 attached to a support B side, and upper and lower attachment members thereof. 3,
Lower elastic support 7, upper elastic support 9 disposed between
And a plug 11.

The upper mounting member 3 and the lower mounting member 5 are disc-shaped substrate portions 3A and 5 respectively.
The lower elastic support 7 is mounted on the base plate portion 5A of the lower mounting member 5.

The lower elastic support body 7 is a thick upper and lower reinforcing plate arranged above and below.
13 and 15 and the laminated elastic body 17 provided between the upper and lower reinforcing plates 13 and 15, and the lower elastic support body 7 is mounted by the board portion 5A.
The dowel pin 19 protruding from is fitted into the hole 23 of the lower reinforcing plate 15 to carry out.

The laminated elastic body 17 is a plurality of thin-walled reinforcing plates that are vertically spaced.
25 and a thin rubber plate 27 integrally molded between the thin reinforcing plates 25.

The upper and lower reinforcing plates 13 and 15 and the thin reinforcing plate 25 are formed of steel plates or fiber reinforced hard rubber plates.

At the center of the lower elastic support 7, a hole 29 is penetrated between the upper and lower reinforcing plates 13 and 15, and the plug 11 is fitted into the hole 29.

The plug 11 is formed of a plastic material such as lead. When the plug 11 is displaced in the horizontal direction, the inner peripheral portion of the hole 29 of the lower elastic support 7 due to the fitting of the plug 11 is displaced in the horizontal direction integrally with the corresponding plug 11 portion.

The lower surface of the upper elastic support member 9 is placed on the upper surface of the lower elastic support member 7, and the upper surface of the upper elastic support member 9 is brought into contact with the lower surface of the substrate portion 3A of the upper mounting member 3 so that the upper elastic support member 9 is placed between the lower elastic support member 7 and upper mounting member 3. Arrange. That is, in the embodiment, in order to improve the workability, the upper elastic support body 9 is provided by simply utilizing the frictional force between the upper and lower surfaces without providing any coupling means.

The upper elastic support 9 is composed of a plurality of thin reinforcing plates 31 vertically spaced from each other, and a thin rubber plate integrally molded between the thin reinforcing plates 31.
The thin reinforcing plate 31 is formed by overlapping with 33, and the material of the thin reinforcing plate 31 is the same as that of the reinforcing plate 25.

Then, a cylindrical portion 35 is vertically provided so as to cover the upper elastic support body 9 from the base plate portion 3A of the upper mounting member 3, and a flange that faces the outer periphery of the upper reinforcing plate 13 at a predetermined interval at the lower end of the cylindrical portion 35. Form 37.

In the figure, reference numerals 38 and 39 denote mounting holes formed in the upper and lower mounting members 3 and 5, respectively.

Next, attachment of the seismic isolation support device 1 will be described with reference to FIG.

In FIG. 2, S indicates a structure and B indicates a base which is a support.

A lower base plate 41 having a size corresponding to the lower mounting member 5 is fixed to the base B, and a cap nut 43 embedded in the base B and an anchor bolt 45 are provided on the lower base plate 41.

An upper base plate 47 of a size corresponding to the upper mounting member 3 is fixed to the structure S, and the upper base plate 47 is fixed.
A cap nut 49 embedded in the structure S and an anchor bolt 51 are provided in the structure.

The seismic isolation support device 1 is attached between the structure S and the foundation B via the upper and lower base plates 41 and 47.

To mount the seismic isolation support device 1 on the foundation B, the lower mounting member 5 is placed on the lower base plate 41, the bolt 53 screwed to the cap nut 43 is inserted into the mounting hole 39 of the lower mounting member 5, and the bolt 53 is attached.
The lower mounting member 5 and the lower base plate 41 are fastened together by the nut 55 screwed to.

Further, for mounting to the structure S, the upper mounting member 3 is brought into contact with the upper base plate 47, the bolt 57 screwed to the cap nut 49 is inserted through the mounting hole 38 of the upper mounting member 3, and screwed to the bolt 57. The nut 59 is used to fasten the upper mounting member 3 and the upper base plate 47.

Next, the operation will be described.

First, when a slight vibration acts on the structure S, as shown in FIG. 3, a shear deformation occurs in the upper elastic support body 9, and the slight vibration is absorbed by this shear deformation.

In this case, since the microvibration is absorbed by the upper elastic support 9 and is not transmitted to the plug 11, the initial rigidity of the seismic isolation support device 1 can be lowered, and an excellent vibration isolation effect against the microvibration is exhibited.

In addition, when a large shaking earthquake occurs and the foundation B vibrates in the horizontal direction with a large amplitude, the structure S tries to remain stationary due to inertia, so that the space between the upper mounting member 3 and the lower mounting member 5 is reduced. Then, a force (that is, a horizontal shearing force) in a direction to relatively displace the mounting members 3 and 5 in the horizontal direction acts.

At this time, as compared with the lower elastic support body 7 in which the shear deformation is suppressed by the plug 11, the upper elastic support body 9 without the plug 11 is more likely to be sheared and deformed. Only the support 9 undergoes shear deformation.

While the deviation of the vibration is small, the shearing deformation of the upper elastic support 9 absorbs the deviation of the vibration of the foundation B in the horizontal direction, so that the structure S deviates only slightly in the horizontal direction. do not do.

However, when the vibration deviation reaches a certain level, the inner periphery of the flange 37 and the outer periphery of the upper reinforcing plate 13 are laminated elastic body.
Since the upper elastic support member 9 abuts via the outer peripheral portion, the upper elastic support member 9 cannot be further shear-deformed, and the displacement of the foundation B is not absorbed by the upper elastic support member 9, so that the structure S is better than before. A large horizontal acceleration is generated, and the horizontal shear force (the magnitude of this horizontal shear force is approximately equal to the product of the acceleration of the structure S and its mass) becomes larger than before.

Therefore, a larger horizontal shearing force acts on the lower elastic support 7 and the plug 11, so that the lower elastic support 7 and the plug 11 both undergo shear deformation.

Since most of the shear deformation of the plug 11 is plastic deformation, the plug 11 converts the vibration energy into heat energy and dissipates with the shear deformation.

Therefore, when the foundation B vibrates in the horizontal direction with a large amplitude due to an earthquake or the like, the lower elastic support body 7 having a characteristic as a spring element and the plug 11 substantially functioning as a damping element cooperate with each other, The horizontal vibration excursion is effectively absorbed and the vibration is effectively damped.

That is, when an excessive horizontal load is applied, the structure S and the upper reinforcing plate 13 are still connected by the flange 37, and the load is directly transmitted to the plug 11, so that the plastic deformation resistance of the plug 11 is effective. Can be used for excellent damping effect.

Next, the second and third embodiments will be described.

FIG. 4 is a sectional view of the essential parts of the second embodiment, and FIG. 5 is a V- of FIG.
FIG. 6 is a sectional view taken along line V, FIG. 6 is a sectional view of an essential portion of the third embodiment, and FIG. 7 is a sectional view taken along line VII-VII of FIG.

In the second embodiment, as shown in FIGS. 4 and 5, four holes 61 are formed in the upper elastic support body 9 so as to vertically penetrate therethrough.

Further, in the third embodiment, as shown in FIGS. 6 and 7, the upper elastic support member 9 is composed of three independent single units 63. Each single unit 63 is a thin reinforcing plate 65 and a thin rubber plate 67.
And the reinforcing plate 65 is made of the above-mentioned reinforcing plate 31.
Is the same as. Further, in the third embodiment, the load from the structure S side is evenly received by the lower elastic support 7 and the plug 11,
A support plate extending over the upper surface of the upper reinforcing plate 13 and the upper end surface of the plug 11.
69 is provided, and each single body 63 is disposed on the support plate 69.

In this way, if the holes 61 are formed in the upper elastic support body 9 or if the upper elastic support body 9 is composed of a plurality of single bodies 63, the diameter and number of the holes 61 and the diameter and number of the single bodies 63 can be appropriately selected. Then, the reinforcing plate 31
The initial rigidity and vertical support capacity of the seismic isolation support device 1 can be easily set to desired values without changing the material of the rubber plate 33 or the like.

In the embodiment, the building is described as the structure and the foundation is illustrated as the support, but the present invention can be applied to all the structures that are advantageous to be seismically isolated regardless of the name of the structure. Of course, it can be applied to the floor where machines and computers are installed.

(Effect of the Invention) As is clear from the above description, according to the present invention, the excellent vibration damping effect is exhibited even for minute vibrations, and the excellent damping effect is exerted even for a large horizontal load. You can get a seismic isolation support device.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a seismic isolation support device according to the first embodiment, FIG. 2 is a cross-sectional view of the same / attached state, and FIG. 3 is the same / cross-sectional view of a state in which microvibration acts, FIG. Is a sectional view of the essential part of the second embodiment, FIG. 5 is a sectional view of the VV line of FIG. 4, FIG. 6 is a sectional view of the essential part of the third embodiment, and FIG. 7 is a VII-VII line of FIG. Cross section,
FIG. 8 is a sectional view of a conventional device. In the figure, 1 is a seismic isolation support device, 3 is an upper mounting member, 5 is a lower mounting member, 7 is a lower elastic support, 9 is an upper elastic support, 11 is a plug, 13 is an upper reinforcing plate, 37 is a flange, S is a structure and B is a support.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Eiji Kuroda 4 13-13 Arakicho, Shinjuku-ku, Tokyo Sumitomo Construction Co., Ltd.

Claims (3)

[Scope of utility model registration request] 1. A seismic isolation support device provided between a structure and a support for supporting the structure, wherein an upper mounting member mounted on the structure side and a lower mounting member mounted on the support side. A lower elastic support disposed on the lower mounting member, an upper elastic support disposed between the lower elastic support and the upper mounting member, and the lower elastic support inside the lower elastic support. The lower elastic support body includes thick upper and lower reinforcing plates respectively located in upper and lower portions of the plug, and a peripheral portion of the plug between the upper and lower reinforcing plates. And a laminated elastic body formed by stacking thin-walled elastic plates on top of each other, and the upper elastic support is formed by stacking thin-walled reinforcing plates and thin-walled elastic plates on top of the upper mounting member. Is a flap that faces the outer periphery of the upper reinforcing plate at a predetermined interval. Nji is provided, seismic isolation support device, characterized in that. 2. The seismic isolation support apparatus according to claim 1, wherein holes are formed in the upper elastic support in the vertical direction. 3. The seismic isolation support device according to claim 1, wherein the upper elastic support body is composed of a plurality of single bodies independent of each other.