JPH09324832A - Base isolation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize the deflection of a supported body against a shock so as to prevent its floating, by connecting a neck member between a first piece and a second piece so as to be made to serve as a connecting member, and crossing each other a first guide member and a second guide member, which have slits through which the neck member is passed and grooves in which the first piece or the second piece is guided. SOLUTION: Elastic bodies 35 are sandwiched between two same circular plates 34 so as to be made to serve as a first piece 31 and a second piece 32, and connected to each other through a neck member 33 so that the neck member 33 is made to serve as a connecting member. Slits 21 and the like through which the neck member 33 is passed and grooves 12, 22 in which the first piece 31 or the second piece 32 is guided, are arranged in the first guide member 10 and the second guide member 20, and the slits 21 and the like are so formed that the neck member 33 can be freely passed therethrough and the plates 34 may not be slipped off therefrom. When force such as an earthquake is applied to a supported body, relative movement between the first guide member 10 fixed to the supporting body of a base isolation device and the second guide member 20 fixed to the supported body and a shock caused by pressure from below are absorbed in the elastic bodies 35, thereby the swinging and floating of the supported body can be suppressed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention stabilizes a supported body by damping it when there is a possibility that a large amount of shaking will occur on the supported body such as a building or a mechanical device on the support due to an impact such as an earthquake. At the same time, it relates to a seismic isolation device that prevents lifting.

[0002]

2. Description of the Related Art As an example of this type of seismic isolation device, a lifting prevention technique disclosed in Japanese Patent Publication No. 6-45973 is known. According to this, the floating prevention device 3 is provided between the support 1 and the supported body 2 in the structure as shown in FIG. The floating prevention device 3 has a shape in which steel frames 4 and 5 assembled in a rectangular shape on each of the support 1 and the supported body 2 pass through a ring in a chain-linking manner. A technique is disclosed that suppresses a negative force such that the supported body 2 is lifted upward to prevent the supported body 2 from falling.

[0003]

However, such a lifting prevention device has a problem in that the structure is complicated and that a seismic isolation device for cushioning a shock must be additionally provided. Therefore, an object of the present invention is to provide a seismic isolation device that has a simple structure and that can stabilize the shake of a supported body against an impact such as an earthquake and can prevent the lifted body from rising.

[0004]

To achieve this object, the present invention has the following arrangement.

According to a first aspect of the present invention, there is provided a connecting member in which a first piece and a second piece, in which two plates which are separated and face each other are connected by an elastic body, are separated and face each other, and which are connected by a neck member, A first guide member having a slit for passing the neck member and a groove for guiding the first piece; and a first guide member having a slit for passing the neck member and a groove for guiding the second piece, The seismic isolation device is characterized by comprising a second guide member arranged to intersect.

According to a second aspect of the invention, there is provided the seismic isolation device according to the first aspect, wherein the elastic body is made of only a rubber-based material such as natural rubber, high damping rubber, or silicon rubber.

A third aspect of the present invention provides the seismic isolation device according to the first aspect, wherein the elastic body is formed by alternately laminating a rubber material and a steel plate.

According to a fourth aspect of the present invention, in any one of the first to third aspects, frictional resistance reducing means is provided on at least one of the sliding surfaces of the connecting member and the first guide member and the second guide member. The seismic isolation device is characterized by being provided with.

According to a fifth aspect of the present invention, there is provided the seismic isolation device according to any one of the first to fourth aspects, wherein the second guide member is a pedestal for reinforcing the building.

A sixth aspect of the present invention is the seismic isolation device according to any one of the first to fifth aspects, wherein the first guide member and the second guide member are orthogonal to each other.

[0011]

When a force such as an earthquake is applied to a supported body such as a building provided with an appropriate number of seismic isolation devices, the supported body and the support such as the foundation or the ground move relative to each other. That is, relative movement also occurs between the first guide member fixed to the support of the seismic isolation device and the second guide member fixed to the supported body. For example, when a force in the direction of the slit of the second guide member acts, the first guide member is guided by the connecting member and reciprocates along the second guide member. In any direction,
It moves in the horizontal plane depending on the component force in the direction of each slit.
During this movement, a movement difference occurs between the plate that is in contact with the guide member on the surface and the plate that is not in contact with the guide member, and the impact is absorbed by the action of the elastic body.

When the first guide member receives a force to push it upward, the elastic body of the connecting member is compressed,
The energy is absorbed by alternating the tension so that it is pulled.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. 1 to 4 are explanatory views of a seismic isolation device showing a preferred embodiment of the present invention.

As is apparent from FIG. 4, reference numeral 1 in the drawing is a support for the ground, foundation, floor, etc., which is an example of the foundation, and a support in which the first guide members 10 are arranged at appropriate intervals. It is fixed by being embedded in 1 or protruding. The second guide members 20 are arranged so as to intersect with each other in parallel, and the two guide members 10 and 20 are connected by a connecting member 30 at the intersecting position on the support 1. On the second guide member 20 arranged in parallel, the supported body 2, here, a large number of H-shaped steels are arranged in parallel.
And are arranged to intersect in a grid pattern. In this way, this seismic isolation device is used at the intersection of the first guide member 10 and the second guide member 20 arranged between the support 1 and the supported body 2 such as a building or device. Or more than one is used.

The connecting member 30 includes a first piece 31 and a second piece 32.
And are connected via a neck member 33. The first piece 31 and the second piece 32 have a structure in which two identical circular plates 34 which are separated and face each other are connected by an elastic body 35. The plate 34 may be a metal such as a steel plate or stainless steel or a non-metal such as a synthetic resin as long as it is a material having strength and abrasion resistance. The elastic body 35 is made of only a rubber-based material such as natural rubber, high damping rubber, or silicon rubber, or is formed by alternately laminating these rubber-based materials and steel plates.

The neck member 33 is made of a material having rigidity and abrasion resistance, such as stainless steel, and the plate 34 is used.
It is a cylindrical body having a diameter smaller than the diameter of. The cylindrical body may be hollow or solid.

The first guide member 10 has a slit 11 for passing the neck member 33 and a groove 12 for guiding the first piece 31. Similarly, the second guide member 20 also has a neck member 33.
It has a slit 21 for passing through and a groove 22 for guiding the second piece 32. The widths of the slits 11 and 21 are such that the neck member 33 can pass freely and the plate 34 does not come off.

The first and second guide members 10 and 20 may be assembled by assembling a C-shaped channel member or a U-shaped channel member as shown with the slits 11 and 21 opened. As this material, steel is generally used. Especially,
When the second guide member 20 is used as a pedestal that reinforces a building, the building can be inexpensive and highly rigid. When the first and second guide members 10, 20 are arranged orthogonally, the force from any direction can be dealt with evenly compared to any intersection.

The connecting member 30 and the first and second guide members 10,
Friction resistance reducing means is provided on at least one of the sliding surfaces with respect to 20. The frictional resistance reducing means is, for example, applied with a Teflon material, or is subjected to processing such as pasting.

Therefore, when a force such as an earthquake is applied to the supported body 2 such as a building provided with an appropriate number of seismic isolation devices, the supported body 2 and the support 1 such as the foundation or the ground are relatively moved. Movement occurs. That is, the first guide member 10 fixed to the support 1 of the seismic isolation device and the second guide member 2 fixed to the supported body 2
Relative movement also occurs between 0 and. For example, when the force in the direction of the slit 21 of the second guide member 20 acts,
The first guide member 10 is guided by the connecting member 30 and reciprocates along the second guide member 20. When a force acts in an arbitrary direction, the slits 11 and 21 move in the horizontal plane according to the component force in the direction. During this movement, each guide member 1
There is a movement difference between the plate 34 that is in contact with the surface 0 and 20 and the plate 34 that is not in contact with the surface, and the impact is absorbed by the action of the elastic body 35.

When the first guide member 10 receives a force such that the first guide member 10 is pushed up, the elastic body 35 of the connecting member 30 is pressed.
Are compressed and then alternated to be tensioned,
Energy is absorbed. Further, the connecting member 30 can prevent the supported body 2 from rising.

[0022]

According to the invention of claim 1, even when a building or the like receives a force such as an earthquake force, it smoothly moves in the horizontal direction and suppresses the lifting of the supported body in the vertical direction. In addition, since each of them absorbs energy, there is little sway or shake of the building or the like that is the supported body, and there is no risk of falling. Particularly in comparison with the conventional technology, it is possible to provide a seismic isolation device that is applicable to small and lightweight or wooden buildings incorporating a lifting prevention function, and even small articles such as furniture. According to each invention below, in addition to the above effects, the following effects are added respectively.

According to the invention of claim 2, the absorption of energy is excellent.

According to the third aspect of the present invention, the tensile strength and the compressive strength are strong, and high load and high impact can be endured.

According to the invention of claim 4, smooth movement is guaranteed.

According to the invention of claim 5, a building can be provided robustly and at low cost.

According to the invention of claim 6, the force from any direction can be dealt with uniformly as compared with the arbitrary intersection.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram in which some components of the seismic isolation device of the present invention are removed.

FIG. 2 is a schematic configuration view of the seismic isolation device of the present invention viewed from the direction orthogonal to FIG.

FIG. 3 is an overall perspective view of the seismic isolation device of the present invention.

FIG. 4 is a construction drawing of the seismic isolation device of the present invention.

FIG. 5 is a cross-sectional view showing a conventional lifting prevention device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Support body 2 Supported body 10 1st guide member 11, 21 Slit 12, 22 groove 20 2nd guide member 30 Connecting member 31 1st piece 32 2nd piece 33 Neck member 34 Plate 35 Elastic body

Claims (6)

[Claims] 1. A connecting member in which a first piece and a second piece in which two plates which are spaced apart and face each other are connected by an elastic body are spaced apart and face each other and are connected by a neck member, and which passes through the neck member. A first guide member having a slit for guiding the first piece and a slit for passing the neck member and a groove for guiding the second piece, and arranged to intersect with the first guide member. A seismic isolation device comprising: 2. The seismic isolation device according to claim 1, wherein the elastic body is made of only a rubber-based material such as natural rubber, high-damping rubber, or silicon rubber. 3. The seismic isolation device according to claim 1, wherein the elastic body is formed by alternately laminating a rubber material and a steel plate. 4. The frictional resistance reducing means according to claim 1, wherein at least one of the sliding surfaces of the connecting member, the first guide member and the second guide member slides on each other. A seismic isolation device characterized in that 5. The seismic isolation device according to claim 1, wherein the second guide member is a pedestal that reinforces the building. 6. The seismic isolation device according to claim 1, wherein the first guide member and the second guide member are orthogonal to each other.