JPH0646059B2 - Seismic isolation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is intended to support foundations of various buildings, floors in buildings or various devices or articles while protecting them from earthquakes and other vibrations. It relates to seismic devices.

[Prior Art] Conventional seismic isolation devices basically support the floor.
It is proposed that legs are formed at the bottom of the plate and rubbers are attached to the lower ends of these legs.

As a seismic isolation device for a building or the like, there is one in which an elastic material made of laminated rubber is arranged between a foundation and a structure.

No seismic isolation device that supports the foundation itself has been proposed.

[Problems to be Solved by the Invention] The former is integrated with the floor and cannot be freely used for various target seismic isolation. Furthermore, it is difficult to say that the mechanism has sufficient seismic isolation in both the horizontal and vertical directions.

Similarly, the latter cannot be freely applied to various objects and its seismic isolation is not sufficient.

INDUSTRIAL APPLICABILITY The present invention easily supports the base of a building itself in addition to the floor of a building, or various seismic isolated objects such as various kinds of articles or devices, while easily supporting them in the horizontal and vertical directions. It is an object of the present invention to provide a device capable of providing a high degree of seismic isolation against any of the above.

[Means for Solving the Problems] The gist of the configuration of the present invention is that a base plate and an upper plate are arranged in a face-to-face relationship, and a regulation cylinder is provided on the inner surface of one of the base plate and the upper plate. One end is slidably joined, and the other inner surface is provided with an elastic column so that the regulation small-diameter portion at the tip is inserted inside the regulation cylindrical body. A spring member that holds the position of the regulating cylinder while allowing it to slide in the radial direction is provided between the base and the member that is concentrically slidably joined to the member. In the seismic isolation device, an elastic base is provided so as to project from the inner surface of the plate or the upper plate, and the base surface of the elastic base is slidably joined to the inner surface of the base plate or the upper plate to which the regulating cylinder is not joined.

The upper plate is means for connecting the seismic isolation device to the seismic isolation target by, for example, joining the seismic isolation target. Examples of the seismic isolation target include foundations of various buildings, floors in buildings, and various devices or articles. Further, the devices or articles include computers and the like.

The base plate is a plate-like member that is fixed to a basic portion for supporting the seismic isolation target. For example, when supporting a floor, it is arranged on the floor base, when supporting devices such as computers, it is arranged on the floor, and when supporting the foundation of a building, it is arranged on the ground below it. Then, it is a plate-like member which is arranged on each of the structures serving as a base for supporting the above-mentioned base. In any case, the base plate is a base of the seismic isolation device that supports the seismic isolation target.

As described above, the restriction cylinder is slidably arranged on the inner surface of the base plate or the upper plate, and even if it is composed of one cylinder, it has a multi-layer structure with a plurality of cylinders having different diameters. It may be configured.

The restricting cylindrical body has a flange portion at one end thereof slidably joined to one inner surface of the base plate or the upper plate, and at the other end, a shoulder located around the restricting small diameter portion of the elastic column. It is preferable to form a collar portion that may be slidably joined to the portion.

In addition, the inner diameter of the above-mentioned regulation cylinder is, in the first step, a relative horizontal radial movement range of the elastic column due to vibration such as an earthquake (a relative horizontal oscillation direction of the base plate and the upper plate). It is advisable to select an appropriate diameter to regulate the movement range). Generally, it is appropriate to set this diameter to the extent of horizontal amplitude due to relatively frequent earthquakes. Of course, it is not limited to this. When the restriction cylinders are formed in multiple layers, the diameter of the innermost cylinder can be set to be considerably small.

Now, let us explain about the case where the elastic column moves further relative to this.As a result, the restriction small diameter part of the elastic column engages with the inner circumference of the restriction cylinder, and the restriction cylinder also resists the spring member together with the restriction small diameter part. And then slide it.

Further, as will be described later in detail, the case where the restriction cylinder is formed in a multiple-layer structure will be described. In addition to the above, the above-described action is performed inside the restriction cylinder. That is, the elastic column freely slides inside the innermost cylindrical body, and the radial movement beyond this causes the restricting small diameter portion to engage with the edge of the innermost cylindrical body so that the cylindrical body and When the innermost cylindrical body comes into contact with the outer cylindrical body due to the larger radial direction and the sliding movement, the same movement occurs in the cylindrical body while being oscillated while being regulated by the outer intervening spring member. It will happen. When a similar movement occurs in the outermost cylinder in this way, this is the movement itself of the regulating cylinder described above.

By the way, the positional relationship between the regulation cylinder and the elastic base is such that the outer periphery of the regulation cylinder easily comes into contact with the elastic base when swinging in the horizontal radial direction in the expected maximum earthquake. It should be decided with sufficient margin so that it will not happen.

Further, as described above, when the restriction cylinder is configured in a multiple-layer structure composed of a plurality of cylinders, the inner cylinder and the outer cylinder are slid in the radial direction inside the cylinder inside the outer cylinder, respectively. It is configured to be positioned and held by an intervening spring member arranged therebetween so that it can move freely. Therefore, as the above-mentioned intervening spring member, an inner one having a relatively low elasticity is used.

The elastic column is formed in a columnar shape with synthetic rubber as a main material, for example. The restricted small diameter portion is made of, for example, a metal, and a circular brim is formed on the base portion thereof, and the restricted small diameter portion is disposed at the distal end of the elastic column by being bonded and fixed to the distal end of the elastic column. Is appropriate.

It is suitable to arrange a large number of spring members for slidably holding the restriction cylinder in the radial direction at intervals as small as possible. The type of spring does not matter.

Further, the elastic base is erected from the inner surface of the base plate or the upper plate, and an elastic material having a synthetic rubber as a main material is arranged on the upper part thereof.
The table surface is a smooth surface. If necessary, a slide plate will be placed on the table. This elastic base is formed, for example, on the outside thereof by opening a space concentric with the above-mentioned restriction cylinder.

By the way, the synthetic rubber constituting a part of the elastic base and the elastic column is not limited to a specific material, but it is assumed that it has appropriate elasticity in consideration of the area of each cross section. It is appropriate to prepare various types of elastic materials in appropriate stages and to use them properly according to the weight of the seismic isolation target supported by them.

If necessary, it is preferable to prepare an elastic connecting member having a very good stretchability for connecting the upper plate and the base plate so that the upper plate and the base plate can be appropriately connected.

[Operation] Since the present invention is configured as described above, a plurality of it is used to support the floor inside it in various buildings,
Or used to protect the above-mentioned seismic isolation target by supporting the foundation of the building itself to attenuate earthquakes or other shaking, or by supporting various devices or various items to attenuate earthquakes or other shaking. be able to.

When supporting the various seismic isolation targets with this seismic isolation device, the upper plate is attached to the seismic isolation target and the base plate is installed on the support base. When supporting the floor, the upper plate may also be used as a part of the floor plate.

As mentioned above, the seismic isolation target is to install this seismic isolation device at a predetermined position and place it on it, or fix it to the upper plate.
Alternatively, the upper plate may be set as a part of the upper plate.

When set in this way, when vibration is transmitted to a supporting base such as a floor base due to an earthquake or the like, the seismic isolation can be performed very efficiently.

For example, in the case of a comparatively small earthquake, and when horizontal shaking is the main rocking component, the inner surface of the upper plate or the base plate and the base surface of the elastic base are moved relative to each other according to the rocking transmitted to the base plate. Of the elastic column can also be freely slid, and the regulating small-diameter portion of the end of the elastic column can also be relatively freely moved inside the regulating cylindrical body, so that a seismic isolation effect can be obtained almost completely. .

Further, when the swing becomes large and the restriction small diameter part of the elastic column comes into contact with the inner circumference of the restriction cylinder by the movement thereof, the restriction cylinder also becomes a spring member for holding the position. On the contrary, it is possible to obtain a seismic isolation effect by relatively slidingly moving in the radial direction together with the above-mentioned restricted small diameter portion.

In this way, when the swing is small, the relative slide motion between the elastic base and the upper plate or the base plate with almost no restriction is performed. When the swing is large, in addition to the same slide motion, the restriction small diameter portion of the elastic column is engaged. An effective seismic isolation can be performed by the sliding movement of the combined regulating cylinder against the spring member.

Further, with respect to the vibration in the vertical direction, it is possible to ensure the seismic isolation action by the elasticity of the elastic base.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

This is an example of supporting a floor plate, and is of a type incorporated in a floor member.

As shown in FIGS. 1 and 2, a circular flat surface portion 2 is provided at the center of the square base plate 1 and the circular flat surface portions 2 are provided at the four corners.
The elastic base 4 is set up by leaving the 1/4 circular flat surface portions 3, 3, ... The elastic base 4 is composed of an elastic material 5 from the middle of the height direction to just below the upper end, and a plastic plate 6 having an upper surface of which is a smooth surface is attached to the upper end. It should be noted that chloroprene-based synthetic rubber was adopted as the elastic material, and its elasticity and rigidity were determined to be appropriate for supporting the floor board in this example.

On the circular flat surface portion 2 at the center of the base plate 1, the regulation cylindrical body 7 is slidably arranged in an upright state. As shown in FIG. 1, the regulating cylinder 7 has flange portions 7a and 7b extending outward at the upper end and the lower end, respectively, and the upper surface and the lower surface thereof are formed as smooth surfaces. Further, as shown in FIG. 2, the radial direction 4 is provided on the outer periphery of the regulation cylindrical body 7.
Coil springs 8, 8 ... Which connect to the rising portion of the elastic base 4 are arranged at an angular interval of 5 degrees, and the regulating cylindrical body 7 is circular flat portion 2 unless an external force acts. The position should be maintained in the center of.

On the other hand, the base plate 1 is faced with a square upper plate 9 having the same size as the plane. In this example, the upper plate 9 is used as a substrate of the floor plate, and the decorative material 10 is provided on the upper surface thereof.
Affix.

Further, as shown in FIG. 1, an elastic column 11 is hung and fixed at the center of the lower surface of the upper plate 9, and a restriction small diameter portion 12 is further hung from the lower end thereof. The restricted small diameter portion 12 is formed by hanging a rod-shaped body from the center of a circular brim made of metal and joined to the lower surface of the elastic column 11.

The lower surface of the upper plate 9 is formed into a smooth surface, slidably joined to the upper surface of the plastic plate 6 at the upper end of the elastic base 4, and the lower end shoulder portion of the elastic column 11, that is, the lower surface of the circular brim. , The regulating cylindrical body 7 when moving in the radial direction
It is slidably joined to the flange 7a at the upper end of the.

By the way, the elastic column 11 has a main body formed of chloroprene-based synthetic rubber, like the elastic base 4.

.. and the corners of the upper plate 9 are connected to each other by a coil spring 13. As the coil springs 13, 13, ..., those having very weak elasticity and very good elasticity are adopted.

In this embodiment, since it is configured as described above, it can be used in various buildings as a floor capable of attenuating shaking such as an earthquake.

In the case of this example, however, since the seismic isolation device is incorporated in the floor member, the floor base 14 is formed in the required installation area,
A necessary number of floor members may be arranged on it.

The floor member has an outer edge of the installation area, that is, a portion of the peripheral wall of the room, which is not installed, and a cushion member is inserted and disposed at this position.

Therefore, a floor is extremely easily constructed in the area by the floor member incorporating the seismic isolation device.

Further, as described above, since the seismic isolation device is incorporated in these floor members, when the vibration is transmitted to the floor base 14 due to an earthquake or the like, the seismic isolation can be performed very efficiently.

That is, in the case of a comparatively small earthquake, in which horizontal sway is the main sway component, the lower surface of the upper plate 9 and the plastic plate 6 of the elastic base 4 are moved according to the sway transmitted to the floor base 14. The upper surface of the elastic column 11 slides relatively freely, and the restriction small diameter portion 12 of the elastic column 11 also moves relatively freely inside the restriction cylinder 7 and is hardly restricted. Therefore, in the case of such a swing, the seismic isolation effect can be almost completely obtained.

In addition, the swinging becomes large, and the restriction small diameter portion 1 of the elastic column 11 is
When the movement 2 comes into contact with the inner circumference of the regulation cylinder 7 due to the movement, the regulation cylinder 7 also resists the coil springs 8, 8 ... This results in a radial sliding motion on the circular flat surface portion 2. Therefore, when swinging exceeding the diameter of the regulation cylindrical body 7 occurs in this way, it is possible to slide to the movable range of the regulation cylindrical body 7 while being slightly regulated by the coil springs 8, 8. .

In this way, when the swing is small, there is almost no restriction on the elastic base 4
By the sliding motion of the plastic plate 6 and the upper plate 9 of
If it is large, the regulation cylindrical body 7 moves together with the regulation small-diameter portion 12 while being slightly regulated by the coil springs 8, 8 ... obtain.

Further, even if the elastic columns 11 and above are displaced from their positions due to rocking due to an earthquake or the like, the restricting cylindrical body 7 returns to the central position by the coil springs 8, 8 ... It is a thing.

Further, with respect to the vibration in the vertical direction, the elasticity of the elastic member 5 of the elastic base 4 can ensure the seismic isolation.

Further, the coil springs 13, 13 ...
It has the effect of preventing separation from

Next, another example of the regulation cylindrical body 27 will be briefly described with reference to FIG.

The regulation cylinder 27 is composed of two cylinders 27 having different diameters.
The inner and outer cylindrical body 27 is configured by a double structure by a and 27b.
Between a and 27b, intervening spring members 28, 28, ..., Which are arranged so that their central axes coincide with each other, are connected while being held in position. The intervening spring members 28, 28
Are arranged at constant angular intervals of 45 ° in the radial direction. A collar 29a is provided at the upper and lower ends of each cylindrical body 27a, 27b.
, 29b.

The regulation cylinder 27 is used similarly to the regulation cylinder 7 described above, and is slidably arranged on the upper surface of the circular flat surface portion of the base plate 21, and in the middle of the rising portion of the elastic base and the regulation cylinder. Coil springs 38, 38 ... Which connect to each other are arranged between the outer cylindrical body 27b of 27. These coil springs 38, 38 ... Are also arranged at equal angular intervals.

Further, the restriction small diameter portion 32 of the elastic column 31 hanging down from the center of the lower surface of the upper plate 30 is provided with a cylindrical body 27a inside the restriction cylindrical body 27.
Insert inside. At this time, the shoulder portion 33 of the elastic column 31 is connected to the flange portion 2 at the upper end of the cylindrical body 27a inside the regulation cylindrical body 27.
It is slidably joined to 9a.

The intervening spring members 28, 28 ... Are the coil springs 3.
8, 38 ... Use one with less elasticity.

However, when the horizontal swing is transmitted to the base plate 21 side, if it is small, the relative swing of the elastic column 31, that is, the swing of the restriction small diameter portion 32 is the above-mentioned inward. Staying inside the cylindrical body 27a, free sliding movement between the upper surface of the elastic base (not shown) and the lower surface of the upper plate 30 is performed, so that almost complete seismic isolation can be secured.

When the relative swing of the restriction small diameter portion 32 exceeds the inner side of the inner cylindrical body 27a and is transmitted to the base plate 21, the restriction small diameter portion 32 is attached to the edge of the cylinder 27a. Are engaged with each other and swing together with the cylindrical body 27a while being regulated by the intervening spring members 28, 28 ... Outside the cylindrical body 27a, and the inner cylindrical body 27a slides further in the radial direction to cause the outer cylindrical body 27b. When it comes into contact with the cylinder 27b, the same movement occurs in the cylindrical body 27b. Since the movement of the outer cylindrical body 27b is the movement itself of the regulating cylindrical body 7 described above, the description thereof will be omitted.

Thus, the small swing in the first stage is almost completely without restriction, and the slightly larger swing in the second stage is slightly restricted by the elasticity of the interposition spring members 28, 28 in the restricting cylindrical body 27.
Further, the larger swinging in the third stage can obtain the seismic isolation effect while being restricted by the outer coil springs 38, 38 ....

In the case of this example, the diameter of the inner cylindrical body 27a can be made small, and therefore, after the vibration has subsided, the restricted small diameter portion 32 is more likely to be returned to the central portion. However, the displacement of the upper plate 30 is hard to remain.

[Effect of the Invention] According to the present invention, a floor of a building or a foundation can be easily supported, and when an earthquake or other vibration occurs, vibration or swinging is applied to a member positioned above this. , It is possible to add a seismic isolation effect that significantly blocks. In particular, in the case where the spring member for elastically restricting the movement of the restricting cylinder and the restricting cylinder have a multi-layer structure, an intervening effect for elastically restricting the movement of the cylinder inside each is provided due to the seismic isolation effect due to the vertical sliding motion. By combining the seismic isolation action of the spring member, a seismic isolation device with an extremely large damping rate was obtained.

Furthermore, the return to the original position after the end of the vibration on the upper plate side is improved.

The seismic isolation effect against vertical vibration was also secured.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a schematic sectional view of a seismic isolation device assembled in a floor member, and FIG. 2 is a top plate from the state of FIG. FIG. 3 is a partial cross-sectional view showing another example of the restricting cylindrical body, with the removed elements removed. 1, 21 ... Base plate, 2 ... Circular flat surface part, 3 ... 1/4
Circular flat surface portion, 4 ... Elastic base, 5 ... Elastic material, 6 ... Plastic plate, 7, 27 ... Regulating cylindrical body, 7a, 7b, 2
9a, 29b ... Collar portion, 8, 38 ... Coil spring, 9, 3
0 ... Top plate, 10 ... Decorative material, 11, 31 ... Elastic column,
12, 32 ... Restricted small diameter portion, 13 ... Coil spring, 14
...... Floor base, 27a, 27b ...... cylindrical body, 28 ...... intermediate spring member, 33 ...... shoulder.

Claims (4)

[Claims] 1. A base plate and an upper plate are arranged in a face-to-face relationship, a regulation cylinder is slidably joined to one inner surface of the base plate or the upper plate at one end thereof, and the other end is attached to the inner surface of the other end. An elastic column is projectingly provided so that the restriction small-diameter portion is inserted inside the restriction cylinder, and the restriction is provided between the outer circumference of the restriction cylinder and a member located on a concentric circle with a larger diameter. A spring member that holds the cylinder body in a radial direction while allowing it to slide is disposed, and an elastic base is projected on the inner surface of the base plate or the upper plate to which the regulating cylinder body is slidably joined. A seismic isolation device in which a base surface of a base is slidably bonded to an inner surface of a base plate or an upper plate that is not bonded to the regulation cylinder. 2. The regulation cylinder is formed in a multiple-layer structure of a plurality of concentric cylinders having different diameters when viewed from a plane,
2. The inner and outer cylindrical bodies are positioned and held by an intervening spring member arranged between the inner and outer cylindrical bodies while permitting radial sliding movement inside the nearest outer cylindrical body.
The seismic isolation device described. 3. The seismic isolation device according to claim 1, wherein flange portions are formed at upper and lower ends of the restricting cylindrical body. 4. A slide plate is joined and fixed to a base surface of the elastic base that is joined to the inner surface of the base plate or the upper plate.
The seismic isolation device described.