JPH06221030A - Object base isolator - Google Patents

Abstract

PURPOSE:To sufficiently absorb the vibration of generated earthquake and enable easy, inexpensive construction because of simple structure. CONSTITUTION:An object base isolator is formed of a base body 1 rigidly fixed to the lower side of an object (b), and a bearing body 3 integrally fitted to a foundation bed 2 so as to correspond to the base body 1. The base body 1 is provided with a pressure transmission part 6 for transmitting the vertical load of the object (b), and the bearing part 3 is provided with a pressure receiving part 9 corresponding to the pressure transmission part 6 of the base body 1. Spherical bodies 4 are then interposed between the pressure transmission part 6 and the pressure receiving part 9. The sliding performance of the bearing body 3 fitted to the foundation bed 2 is thereby improved, and the vibration generated by earthquake is not transmitted to the object (b) at the upper part of the bearing body so as to prevent the object (b) and objects inside of the object (b) from overturning and collapse. The damage of earthquake can be thereby suppressed to a minimum. In addition, this device can be manufactured into compact and simple structure, and installation work can be performed easily at low cost without causing the steep extension of a construction period in the construction of a building.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an object seismic isolation device capable of absorbing the vibration of a base and reducing the vibration applied to an object when an earthquake occurs.

[0002]

2. Description of the Related Art Currently, many seismic isolation devices are provided to reduce the vibration of a building or the like in the event of an earthquake, most of which are located between the lower side of the building and the ground contact surface. Rubber and springs are provided to absorb the vibration of the earthquake and suppress the sway of the transmitted structure. (See JP-A-4-89979 and JP-A-4-34247) However, the one using the above-mentioned rubber or spring is swayed back and forth and left and right around its mounting position, and has a large lateral force. In the case of a sway, the amplitude cannot be sufficiently dealt with, and therefore, vibration is transmitted to the upper structure, and the tensile load in the vertical direction is weak and cannot be sufficiently dealt with.

Further, since the structure is complicated and large-scale,
Installation work will be difficult and the construction cost will rise. There were various problems such as.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and a base body fixed to the lower side of an object and a base body integrally attached to correspond to the base body. The base is provided with a pressure transmitting portion for transmitting a vertical load of the object, and the support is provided with a pressure receiving portion corresponding to the pressure transmitting portion of the base, and the pressure receiving portion is provided between the pressure transmitting portion and the pressure receiving portion. An object of the present invention is to provide an object seismic isolation device that can sufficiently absorb vibration of an earthquake that occurs by interposing a sphere and can be constructed easily and inexpensively due to its simple structure.

[0005]

The means of the present invention for attaining the above-mentioned object is to attach an object at a plurality of positions on the lower side of the object so that the object can be stably supported, and to the lower side of the object, a vertical direction of the object is provided. A base body provided with a pressure transmitting portion for transmitting a load, and a base body opposed to the base body, integrally attached to a base on which the object is placed, and provided with a pressure receiving portion corresponding to the pressure transmitting portion of the base body. In the structure of the object seismic isolation device, there is provided a support body for supporting the base body and a sphere interposed between the pressure transmitting portion of the base body and the pressure receiving portion of the support body.

Further, in order to stably support the object, it is attached to the lower side of the object at a plurality of points, and an outer peripheral pressure transmitting section and a lower pressure transmitting section for transmitting the vertical load of the object are provided on the outer periphery and the lower side thereof. The base body provided and a recess for accommodating the lower pressure-transmitting portion of the base body are formed in accordance with the outer shape of the base body, and are integrally attached to the base on which the object is placed. An outer peripheral pressure receiving portion corresponding to the outer peripheral pressure transmitting portion of the base body, and a support body for supporting the base body provided with a bottom surface pressure receiving portion corresponding to the lower pressure transmitting portion of the base body on the bottom surface of the recess, and an outer periphery of the base body, A structure of an object seismic isolation device including a lower pressure transmitting portion and a spherical body interposed between the outer circumference of the bearing and the bottom pressure receiving portion.

Further, a locking means is provided for linking the base body and the support body with each other.

The sphere may have elasticity.

[0009]

The object seismic isolation device of the present invention configured as described above has the following operation. The support is installed on the base at the corresponding position where the object is installed, and the pressure transmission part of the base is brought into contact with the pressure receiving part of this support via the sphere by its own weight. Separated by intervening.

When an earthquake occurs in the state where the object is mounted on the base body, the lateral wobbling of the base body laterally moves the support body of the object, but the movement of the support body is mediated by the base body and the support body. The rolling sphere easily rolls between the pressure transmitting portion and the pressure receiving portion to hold the upper base body in a stationary state, so that the rolling vibration of the earthquake is not transmitted.

Further, the body support is vertically moved in response to the vertical vibration of an earthquake. In the movement of the support, an elastic sphere interposed between the base and the support causes the pressure transmitting part and the pressure receiving part to move. Since the upper base body is held stationary by being compressed between the two, the vertical vibration of the earthquake is not transmitted, and the locking means does not cause the object to fall.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of an object seismic isolation device according to the present invention will be described with reference to the drawings.

In each of the drawings, A is an object seismic isolation device, which is a base 1 fixed to a lower side of the object b at a plurality of positions so as to stably support the object b, and a base 2 on which the object b is placed. Support body 3 that is integrally attached to and supports the base body 1.
And a spherical body 4 interposed between the base body 1 and the support body 3.

The above-mentioned object b is, for example, a large building such as a high-rise building, a factory, a storage tank, etc., on which the ground is installed, which serves as the base 2. Computers, OA equipment, NC machine tools, etc. are also used, and the floor surface of the building becomes the base 2, and it is also used for the installation / installation of gas cylinders, fluid / powder containers, etc. Or the ground in the building site is the base 2, and the relationship between the object b and the base 2 is
It is set as appropriate depending on the object b using the device A.

FIGS. 1 to 4 show the device A of the first embodiment.
The base body 1 is made of a solid material such as concrete, metal, ceramics, natural or artificial stone, etc. It is formed in a rectangular tube shape or the like, and a connecting means c is attached to the upper part thereof to be integrated with the object b. Among them, in the case shown in FIG. 3 is provided to transmit the vertical load of the object b, and in the case shown in FIGS. 3 and 4, the outer peripheral pressure transmitting part having a smooth lower surface on the outer peripheral part of the upper part of the main body 5. 6a is extended and a lower surface pressure transmitting portion 6 of a smooth surface is provided on the lower side portion of the main body 5 to transmit the vertical load of the object b.

The support body 3 is formed into a cylindrical shape or a rectangular tube shape in accordance with the outer shape of the base body 1 by the same effect as that of the base body 1. A recess 8 that can be inserted into the main body 5 of the base 1 without interfering with the main body 5 is formed, and in the case shown in FIG. 2, the bottom surface of the recess 8 corresponds to the pressure transmitting portion 6 of the base 1. A pressure receiving portion 10 is provided, and in the case shown in FIGS. 3 and 4, an outer peripheral pressure receiving portion 9 having a smooth surface corresponding to the outer peripheral pressure transmitting portion 6a of the base 1 is provided on the outer peripheral portion of the upper portion thereof, and the concave portion is provided. A bottom surface pressure receiving portion 10 corresponding to the lower pressure transmission portion 6 of the substrate 1 is provided on the bottom surface of the base 8.

Therefore, when fitting the base body 1 and the support body 3, the inner wall of the recess 8 of the support body 3 and the main body 5 of the base body 1 are fitted.
The outer periphery of the base 1 is provided with a gap d larger than the expected seismic amplitude. Further, in the case shown in FIG. In the case shown in FIG. 3 and FIG. 4, a gap e larger than the above-mentioned possible earthquake amplitude is provided between the two, and a covering member 7 that performs an action of airtightness, watertightness, etc. is provided between them. , The spherical body 4 described later has the same function.

The sphere 4 described above is 360 ° of the bearing 3.
It makes it easy to move with respect to the whole, and has a steel ball made of metal with a certain size, a solid body made of polymer rubber with high stress, restoring force, and elastic force, or a hollow body with adjusted internal pressure. And a soft body having a large number of small spheres inside a hollow sphere, which are interposed between the base 1 and the support 3 in a large number of groups. The load of (4) is received by this group of spheres 4 and one that can withstand the load is adopted.

In the case shown in FIG. 2, it is provided between the pressure transmitting body 6 of the base body 1 and the pressure receiving body 10 of the support body 3, and in the case of FIGS. 3 and 4, the outer peripheral transmission of the base body 1 is carried out. Pressure portion 6a, lower pressure transmitting portion 6, outer peripheral pressure receiving portion 9 of bearing 3, and bottom pressure receiving portion
It is provided between 10 and.

The above-mentioned connecting means c fixes the object b and the base body 1. For example, when the object b is a building, as shown in FIG. 3, a frame attached to the upper part of the base body 1 is used. A connecting member 12 such as a reinforcing bar extending from the object b is arranged on the body 11 and is joined by concrete 13 or the like. In the case of a light and small object such as a work of art, a tape or an adhesive having excellent adhesive strength is used. It may be connected by an agent or a linking member such as a belt or a chain.

4 to 6, reference numeral 14 denotes a holding member for preventing the scattering of the spherical body 4, and as shown in FIGS. 4 to 5 (a), the outer peripheral pressure receiving body 9 and the bottom pressure receiving body 10 of the support body 3 are shown. And a dent portion capable of accommodating the spherical body 4 provided with a slanting portion 15 having a straight line or an arc shape with a gentle peripheral portion is formed, and when the support body 3 is moved by vibration, the spherical body 4 group is formed into the inclined portion. By being compressed by 15, the vibration is damped.

The holding member 14 may be provided on the outer circumference of the base body 1 and the lower pressure transfer portions 6a, 6 as shown in FIG. 5 (b), or as shown in FIG. 5 (c). Lower pressure transmission part 6a,
6 and the outer peripheral pressure receiving body 9 and the bottom surface pressure receiving body 10 may be provided, and as shown in FIG. 6, the pressure transfer portions 6a and 6 and the pressure receiving portions 9 and 10 are each a hemisphere 4. In some cases, the radius is set so that the bottom surface has the amplitude of the vibration assumed in the earthquake.

2 to 4, reference numeral 16 denotes a cushioning material attached to the inner peripheral wall of the concave portion 8 of the support body 3, which is formed of an elastic material such as rubber and is subjected to an earthquake of a gap d or more of the concave portion 8. When there is an amplitude of vibration, the impact of contact between the support body 3 and the base body 1 is alleviated.

FIG. 7 shows the apparatus A of the second embodiment.
This is for seismic isolation by absorbing S-waves and P-waves generated in the event of an earthquake, and the basic configuration is the same as that of the first embodiment device, but the feature of this device A is that it is pulled in the vertical direction. The locking means f having sufficient stress against the force is provided.

The structure is such that the auxiliary pressure transmitting portions 17, 1 are provided at one or a plurality of locations on the periphery of the main body 5 of the base body 1.
7 is attached to the inner peripheral portion of the recess 8 of the support body 3 so as to hold the auxiliary pressure transmitting portions 17, 17 ,.
... are installed inside, and these auxiliary pressure transfer parts 17, 17 ... and auxiliary pressure receiving parts
18, 18, ..., and the outer peripheral pressure transmitting portion 6 and the outer peripheral pressure receiving portion 9
In addition, the lower pressure transfer portion 7 and the lower pressure receiving portion 10 have elastic spheres 4
Is intervened.

Therefore, in the event of an earthquake, the base 2
The rolling (S wave) of the support 3 mounted on the base 3 does not transmit the vibration to the base body 1 or the object b placed on the upper part due to the rolling of the sphere 4, and the vertical motion of the support 3 Also for (P wave), spherical bodies 4, 4 ...
The vibration is absorbed by the elastic force of and the vertical vibration is not transmitted.

Further, the auxiliary pressure transmitting parts 17, 17 ... And the auxiliary pressure receiving part 1
Due to the engagement with 8, 18, ..., The object 2 on the upper part of the base body 1 does not fall down even if there is horizontal or vertical shaking.

FIG. 8 shows the apparatus A of the third embodiment.
It is a modification of the second embodiment having locking means f,
Of these, FIG. 8 (a) shows a multiple structure in which an intermediate support 19 is provided between the base 1 and the support 3, and FIG. 8 (b) shows a double stacked structure in which the support is provided. A sub-base 20 having the same structure as the base 1 is hung below the base 3, and a sub-support 21 having the same structure as the support 3 is provided via a sphere 4 so as to surround the sub-base 20. This sub-support is engaged
21 is attached to the base 2, and it is possible to absorb vibration in stages, and in particular, the absorption rate of pitching is improved as much as possible.

The above-mentioned locking means f is more effective for mounting a gas cylinder or the like which is dangerous when it falls, and the base body 1 and the support body 3 are linked to each other, and
The structure is not particularly limited as long as it does not hinder the sliding between the two.

FIG. 9 shows an example in which the apparatus A of each of the above-described embodiments is adopted as a basic unit of a house or the like, and the connecting means c is used as the basic of a building b. 22 is spanned, and the lower surface thereof is in contact with the base 2 via the sphere 4.

[0031]

As described above, since the object seismic isolation device according to the present invention has the spherical body provided between the base body and the supporting body, the slidability of the supporting body mounted on the base is improved, and the seismic effect is reduced. Since the vibration generated by the above is not transmitted to the object above the support, the object and the object inside the object do not fall or collapse, and the earthquake damage can be minimized.

Further, since the structure is simple and compact, the installation work is easy and the cost is low, the construction period is not increased in the construction of the building. It has special effects such as.

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment showing a basic configuration of an object seismic isolation device according to the present invention.

2 is a cross-sectional view showing a main part of the apparatus in FIG. 1 in a mounted state.

FIG. 3 is a cross-sectional view showing a main part in a mounted state showing another example in FIG.

FIG. 4 is a cross-sectional view showing an example in which a holding member is provided in FIG.

FIG. 5 is an explanatory view showing each example of the holding member in FIG.

6A and 6B show still another example of the holding member in FIG. 4, in which FIG. 6A is a front view and FIG. 6B is a plan view.

FIG. 7 is a sectional view showing a second embodiment of the object base isolation system according to the present invention.

FIG. 8 is a sectional view showing a third embodiment of the object base isolation system according to the present invention.

9 is an explanatory view showing a state in which the second embodiment device in FIG. 7 is adopted in a house.

[Explanation of symbols]

 b Object 1 Base 2 Base 3 Support 4 Sphere 6a Outer peripheral pressure transmitting portion 6 Lower pressure transmitting portion 8 Recess 9 Outer peripheral pressure receiving portion 10 Bottom pressure receiving portion 17 Auxiliary pressure transmitting portion 18 Auxiliary pressure receiving portion

Claims (4)

[Claims] 1. A base body, which is attached to a lower side of the body at a plurality of positions so as to stably support the body, and a pressure transmitting portion for transmitting a vertical load of the body is provided on the lower side of the base body, and the base body is opposed to the base body. And a body for mounting the object integrally on a base on which the object is placed and supporting the base body provided with a pressure receiving portion corresponding to the pressure transmitting portion of the base body, and a pressure receiving portion of the base body and a bearing body. An object seismic isolation device, characterized in that it is provided with a sphere interposed between the part and the part. 2. An object is attached to a lower side of the object at a plurality of positions so as to stably support the object, and an outer peripheral pressure transmitting section and a lower pressure transmitting section for transmitting a vertical load of the object are provided on an outer periphery and a lower side of the object. And a recess for accommodating the lower pressure-transmitting portion of the base in conformity with the outer shape of the base, are integrally attached to the base on which the object is placed, and the base is provided on the upper periphery. An outer peripheral pressure receiving portion corresponding to the outer peripheral pressure transmitting portion and a bottom surface pressure receiving portion corresponding to the lower pressure transmitting portion of the base body on the bottom surface of the recess, and a supporting body for supporting the base body; An object seismic isolation device, comprising: a side pressure transmitting portion and a sphere interposed between an outer periphery of a bearing and a bottom pressure receiving portion. 3. The object seismic isolation device according to claim 1, wherein the base body and the support body are provided with locking means which are linked to each other. 4. The object seismic isolation device according to claim 1, wherein the sphere has elasticity.