JPH09210125A - Base isolation device of three dimensional vibration absorption - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dump a structure such as an apparatus producing specific micro vibration or a building having such an apparatus, and whole usual construction to accommodate to the three dimensional vibration such as an earthquake. SOLUTION: Several metallic plates 2 which opposing top and bottom surface being three dimensional undulated are laminated, at the bottom thereof a metallic plate of flat bottom 2a, at the top thereof a metallic plate of flat top 2a being disposed, so as to sandwich between respective lamination, an elastic member 3 on whole and/or partial three dimensional ripple and to pierce a bolt insertion hole 5 in order to form a base isolation polymer 1. Furthermore, on the base G at which an object to be supported is disposed, an anchor bolt 4 is fixedly secured upright with a bolt hole 10 formed at the side of object to be supported. The anchor bolt 4 is inserted through the bolt hole 5 of the base isolation polymer 1 and the bolt hole 10 of the object to be supported to engage with a nut 6 to hold the base isolation polymer 1 between the base G and the object to be supported.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention buffers a device itself that emits a peculiar minute vibration or a structure such as a building having the device itself, and a general building as a whole, and is capable of vibration in a three-dimensional direction due to an earthquake or the like. Regarding seismic isolation devices that can be used.

[0002]

2. Description of the Related Art Conventionally, as a countermeasure against an earthquake, there has been provided a seismic isolation device for absorbing vibration of a building or the like by laminating flat anti-vibration rubber. According to this device, the shake in the horizontal direction is absorbed by the displacement elastic force caused by the lateral displacement phenomenon of the anti-vibration rubber, as shown in FIGS. In other words, the interposition of the anti-vibration rubber causes the repulsive force of the rubber to act in the vertical shaking (which occurs in a direct earthquake), but causes the displacement resilience to act in the horizontal direction as described above. There is a weakness that a large amplitude occurs in both the vertical and horizontal directions.

And, in particular, horizontal fluctuations lead to separations between them in the case of constructions, which can lead to destruction of their connecting parts. For example, investigations of electrical equipment after a large earthquake have confirmed that the breakage of the connecting parts causes the stop of the function rather than the breakage of the main body. For these reasons, some devices are provided with a means for restraining horizontal vibrations within a certain amplitude, but the physical suppression thereof brings about the undesirable result of stress fracture on the other side.

Further, the fluctuation in the vertical direction means that the acceleration load of the vibration is directly applied to the anti-vibration rubber as it is, so that the greater pressure resistance is required.
The vibration of an actual earthquake has a three-dimensional directivity in which vertical vibration waves are directly below the epicenter, and horizontal and vertical vibration waves are irregularly and complexly combined in the vicinity of the epicenter. When the waves are far from the epicenter, there is a characteristic that horizontal vibration waves occur. In the previous Kobe earthquake, many earthquake-resistant structures such as buildings, condominiums, highways, electric water and gas facilities were destroyed, and horizontal vibrations were compounded where vertical vibrations released gravity. It was confirmed that it has a great destructive power beyond imagination.

Further, as a measure against vibration noise of mechanical devices such as engines, motors, transformers, etc. which generate natural vibrations, a seismic isolation device for absorbing vibrations is provided by laminating planar vibration-proof rubber. There is. Anti-vibration rubber deteriorates rapidly in a few years, causing loss of elasticity and deformation of the rubber, and the position of machines, devices, structures, etc. placed on it may shift,
It may tilt. As a result, the connection part of the device may be broken and disconnected, and from this aspect as well, there is a demand for some seismic isolation measures.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the actual situation of a conventional seismic isolation device using a rubber vibration isolator, and is to separate a building or the like due to horizontal vibration and a connection by the separation. It is possible to prevent the destruction of parts,
In addition, it provides a seismic isolation device that can withstand three-dimensional vibrations that can withstand earthquakes.

[0007]

In order to solve the above-mentioned problems, the present invention laminates a plurality of metal plates 2 each having upper and lower opposing surfaces F and f formed in the same type of three-dimensional corrugation, and the lowermost layer is A metal plate 2a having a flat bottom surface, and a metal plate 2 having a flat top surface on the uppermost stage
a is polymerized, and the seismic isolation polymer 1 in which the elastic members 3 are wholly or partly sandwiched is formed in accordance with the three-dimensional corrugation between the respective laminated layers. Then, the base surface G on which the support target is set
A three-dimensional vibration absorption type seismic isolation device, characterized in that the seismic isolation polymer 1 is sandwiched by a horizontal fixing means L for the support object interposed between the seismic isolation polymer 1 and the support object.

Further, the horizontal fixing means L penetrates the seismic isolation polymer 1 through the bolt vertical hole 5, and the anchor bolt 4 is fixedly erected on the base surface G on which the object to be supported is installed. A bolt hole 10 is provided on the object side, and the anchor bolt 4 is inserted into the bolt vertical hole 5 of the seismic isolation polymer 1 and the bolt hole 10 of the object to be supported and fastened with a nut 6. It is a thing. Cushion means K for the seismic isolation polymer 1 is interposed in the anchor bolt 4.

Further, the base metal plate 2a and / or the top metal plate 2b of the seismic isolation polymer 1 are polymerized with metal reinforcing plates 8 and 9. Furthermore, the elastic material 3
Is made of synthetic resin.

Further, the shape of the mountain-shaped portion of the three-dimensional waveform on the upper and lower facing surfaces F and f forms a pyramid. further,
The elastic material 3 is independently sandwiched for each hypotenuse of the pyramid.

[0011]

Since the present invention has the above-described structure, earthquakes, vibrations of engines, motors, transformers, etc. are composite waves of vertical and horizontal waves, but the vibrations are dispersed in the vector direction by the slopes of the upper and lower facing surfaces F and f. Then, from the normal state shown in FIG. 2A, as shown in FIG. 2B, the horizontal vibration wave undergoes vertical vibration conversion, and is shown in FIG. 2C. Thus, the vibration waves in the vertical direction are oscillated in the horizontal direction. That is, vertical vibrations are dispersed and absorbed in the horizontal direction, and horizontal vibrations are vertically absorbed in the vertical direction. Further, as shown in FIG. 2D, the vibration in the oblique direction can be reliably received by the inclined surface facing in that direction.

At this time, since the upper and lower facing surfaces F and f are in mesh with each other in the vertical direction, the pitch is larger than the vibration width of the upper and lower facing surfaces F and f particularly in the case of the characteristic microvibration of machines such as an engine, a motor and a transformer. If the width is set to be wide, a large horizontal movement that does not go over the ridges of the upper and lower facing surfaces F and f does not occur, and the positional relationship between the structures (distance A between the transformers shown in FIG. 4) is large. There is no risk of fluctuations. For this reason, it is possible to prevent a disconnection accident that exceeds the strength limit of the direct connection between the structures or the connecting portion via the pipes or wirings connected between the structures.
The pitch height of the mountain can be designed according to the degree of vibration for the purpose of countermeasures. For example, in order to take measures against earthquakes, the upper and lower facing surfaces F and f are taken as measures against the characteristic microvibration of the machine. If you set it to a larger mountain than the size, it will be sufficient.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the upper and lower facing surfaces F and f have the same three-dimensional waveform, and the shape of the chevron portion forms a quadrangular pyramid 7. The metal plates 2 made of stainless steel are laminated in several stages, the metal plate 2a having a flat bottom surface is superposed on the lowermost stage, and the metal plate 2a having a flat top face is superposed on the uppermost stage, and the metal plates 2a are laminated between them. An elastic material 3 made of synthetic resin, which is mainly or partially composed of silicone, is independently clamped for each oblique side 7a of the quadrangular pyramid 7 according to a three-dimensional waveform, and a vertical bolt hole 5 is provided at the center. The seismically isolated polymer 1 is formed. And the seismic isolation polymer 1
On the bottom surface 2a and the top surface 2b, metal reinforcing plates 8 and 9 each having a vertical bolt hole formed at the center are polymerized. As the material of the elastic material 3, a material such as a synthetic resin, which does not change with time, such as a synthetic resin, is preferable. Since raw rubber deteriorates quickly, it is not preferable to use it for a structure installed for a long time.

As for the horizontal fixing means L for horizontally installing the object to be supported, the anchor bolt 4 is fixed and upright on the base surface G on which the object to be supported is installed, and the anchoring bolt 4 is mounted on the base D of the object to be supported. Is provided with a bolt hole 10, and the anchor
The bolt 4 is inserted into the vertical hole 5 of the seismic isolation polymer 1 and the bolt hole 10 of the object to be supported and fastened with the nut 6, so that the seismic isolation polymer 1 is provided between the base surface G and the object to be supported. To be clamped together.

For fixing the anchor bolt 4,
In order to further increase elasticity, the anchor bolt 4 may be provided with a cushion means K for the seismic isolation polymer 1. For example, as shown in (a) of FIG. 3, a mode in which the fixing nut 6 is tightened via the spring 11, or (b) of FIG.
The fixing nut 6 shown in FIG. 1 via the shock absorber 12 in which the elastic material 13 is enclosed in the connecting portion of the anchor bolt 4.
Can be tightened.

The seismic isolation polymer 1 has a prismatic shape in the drawing, but the shape is not limited to this and may be a conical shape or the like. Further, the shape of the mountain-shaped portions of the upper and lower facing surfaces F, f is not limited to the above-mentioned quadrangular pyramid 7, but triangular pyramidal shape, conical shape
It can be formed into various shapes such as a sphere.

[0017]

As described above, according to the present invention, the vibration waves are diverted by the three-dimensional wave-shaped upper and lower facing surfaces F and f and dispersed in the vector direction, and the vertical vibrations vibrate in the horizontal direction and the horizontal vibrations. As in the vertical direction, all complex vibrations in irregular directions are absorbed and attenuated in three dimensions. Further, since the upper and lower surfaces of the upper and lower facing surfaces F and f are in mesh with each other, if the pitch height of the peaks is set according to the degree of vibration for the purpose of countermeasures, a large horizontal level that exceeds the peaks of the waveform is obtained. There is no movement in any direction, and the positional relationship between the structures does not change significantly. Therefore, it is possible to prevent disconnection accidents such as piping and wiring.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of the present invention.

FIG. 2 is a vertical cross-sectional side view of a main part showing (a) normal state, (b) horizontal vibration, (c) vertical vibration, and (d) oblique vibration of the present invention. .

FIG. 3 is a vertical cross-sectional side view showing a main part of each aspect of the present invention in which (a) is a spring and (b) is a shock absorber.

FIG. 4 is a side view showing a use state of the present invention.

[Fig. 5] (a) in the conventional seismic isolation device is
(B) is a vertical cross-sectional side view showing each state when horizontal vibration is performed.

[Explanation of symbols]

 1 seismic isolation polymer 2 metal plate formed in three-dimensional corrugation 2a bottom metal plate at the bottom 2b top metal plate at the top 3 elastic material 4 anchor bolt 5 bolt vertical hole 6 nut 7 three-dimensional corrugation Metal plate of pyramid 7a Slope of metal plate with three-dimensional corrugated pyramid 8 Metal reinforcing plate 9 Metal reinforcing plate 10 Bolt hole 11 Spring 12 Shock absorber 13 Elastic material 14 Washer G Base surface D Foundation of structure K Cushion means L Horizontal fixing means F Lower surface formed in three-dimensional corrugation f Upper surface formed in three-dimensional corrugation

Claims (7)

[Claims] 1. A metal plate (2) having upper and lower facing surfaces F and f formed in the same type of three-dimensional corrugation is laminated in several stages, and a metal plate (2a) having a flat bottom surface is provided at the lowermost stage and an uppermost stage. A metal plate (2a) having a flat top surface is superposed on the seismic isolation polymer (1) in which elastic members (3) are wholly or partially sandwiched along the three-dimensional corrugations between the respective laminated layers. ), And the seismic isolation polymer (1) is sandwiched by interposing the horizontal fixing means L of the supporting object between the base surface G on which the supporting object is installed and the supporting object. 3D vibration absorption type seismic isolation device. 2. A horizontal fixing means L makes a vertical hole (5) of a bolt penetrate through the base-isolated polymer (1), and an anchor bolt (4) is fixedly erected on a base surface G on which the object to be supported is installed. A bolt hole (10) is provided on the side of the object to be supported, and the anchor bolt (4) is used as the vertical bolt hole (5) of the seismic isolation polymer (1) and the bolt hole (10) of the object to be supported. The three-dimensional vibration absorption type seismic isolation device according to claim 1, wherein the three-dimensional vibration absorption type seismic isolation device is inserted into the shaft and fastened with a nut (6). 3. The three-dimensional vibration absorption type seismic isolation system according to claim 2, wherein the anchor bolt (4) is provided with cushion means K for the seismic isolation polymer (1). 4. A metal plate (2) on the bottom of the seismic isolation polymer (1).
The three-dimensional vibration absorbing seismic isolation system according to any one of claims 1 to 3, wherein the metal reinforcing plate (8), (9) is polymerized on the metal plate (2b) of a) and / or the top surface. apparatus. 5. The three-dimensional vibration absorbing seismic isolation device according to claim 1, wherein the elastic material (3) is made of synthetic resin. 6. The three-dimensional vibration-absorption type seismic isolation device according to claim 1, wherein the shape of the mountain portions of the three-dimensional corrugations on the upper and lower facing surfaces F and f is a pyramid. 7. The three-dimensional vibration absorption type seismic isolation device according to claim 6, wherein elastic members (3) are independently sandwiched for each hypotenuse of the pyramid.