JP2006200184A - Base isolation device and base isolation structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a base isolation device suitable for a general dwelling house. <P>SOLUTION: This base isolation device 1 is composed of a vertical swinging shock absorbing means 2 for preventing vertical swinging from a building foundation A from being directly transmitted to a building B and a lateral swinging shock absorbing means 3 arranged on the lower side of the vertical swinging shock absorbing means 2 and preventing lateral swinging from the building foundation A from being directly transmitted to the building; and is characterized in that the vertical swinging shock absorbing means 2 has an elastic member 4 expandable in the vertical direction so as to prevent the direct transmission of the vertical swinging, and a guide member 5 for supporting the elastic member 4 and capable of varying the length in the vertical direction by following the expansion of the elastic member 4, and the lateral swinging shock absorbing means 3 has a sphere 6 integrally movable in the horizontal direction with the vertical swinging shock absorbing means 2, and a pan member 7 having a conical inclined face 71 for placing the sphere 6, so as to prevent the direct transmission of the lateral swinging. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a seismic isolation device and a seismic isolation structure using the seismic isolation device.

  As a seismic isolation device for preventing shaking due to an earthquake or the like from being directly transmitted from a building foundation to a building, a combination of a damper, a link mechanism, and the like is known (see, for example, Patent Document 1).

JP-A-10-213177

The seismic isolation device described above has the following problems.
(1) Since the structure is complicated and the apparatus is large, the cost is increased. Therefore, in consideration of the cost, it is actually difficult to apply to a general residential house.
(2) As simple seismic isolation devices, those using rolling bearings or sliding bearings are known, but such seismic isolation devices can be used for vibrations caused by strong winds or artificial vibrations that occur in daily life. Because it is easy to move even with slight vibrations, it may cause discomfort to residents.

The present invention has been made to solve the above-described conventional problems, and an object thereof is to provide a seismic isolation device suitable for a general residential house and a seismic isolation structure using the seismic isolation device.
Furthermore, an object of the present invention is to provide a seismic isolation device capable of preventing malfunction during microvibration and a seismic isolation structure using the seismic isolation device.

  In order to solve the above-described problems, the first invention of the present application is a seismic isolation device installed between a building and a building foundation, in which the pitching from the building foundation is directly transmitted to the building. The pitch buffer means for preventing and the roll buffer means provided below the pitch buffer means for preventing the roll from the building foundation from being transmitted directly to the building, the pitch buffer means An elastic member that can be expanded and contracted in the vertical direction so as to prevent direct transmission of pitching, and a guide member that supports the elastic member and has a variable length in the vertical direction following the expansion and contraction of the elastic member; The roll buffer means has a sphere that can move integrally with the pitch buffer means in a lateral direction so as to prevent direct transmission of roll, and a mortar-shaped inclined surface on which the sphere is placed. And a dish member.

  Moreover, 2nd invention of this application is said 1st invention, Comprising: The restraint means which restrains the movement of the said spherical body at the time of a fine vibration was provided in the said plate member, It is characterized by the above-mentioned.

  Moreover, 3rd invention of this application is said 2nd invention, Comprising: The said restraint means is a recessed part which can form the said spherical body formed in the center part of the inclined surface of the said plate member.

  The fourth invention of the present application is any one of the first to third inventions, wherein the guide member is provided with an elastic force adjusting means for adjusting an elastic force of the elastic member. .

  The fifth invention of the present application is any one of the first to fourth inventions, wherein a regulating elastic member that deforms following the expansion and contraction of the elastic member is attached between both ends of the guide member. The maximum length in the vertical direction of the guide member is configured to be controllable.

  Further, a sixth invention of the present application is a seismic isolation structure for preventing a vibration from a building foundation from being directly transmitted to a building, using the seismic isolation device of any one of the first to fifth inventions, The upper end of the pitch buffer means is attached to the building foundation, and the plate member is attached to the building, and the pitch cushion means prevents the pitching from the building foundation from being directly transmitted to the building. In addition, the rolling buffer means prevents rolling from the building foundation from being directly transmitted to the building.

  Moreover, 7th invention of this application is said 6th invention, Comprising: The auxiliary pitch buffer means was additionally interposed between the said building foundation and the said building, It is characterized by the above-mentioned.

The seismic isolation device and the seismic isolation structure of the present invention can obtain at least one of the following effects by means for solving the above-described problems.
(1) Both the vertical shock absorbing means and the horizontal shock absorbing means have a simple configuration, and the vertical shock absorbing means and the horizontal shock absorbing means are integrally provided, so that the vertical and horizontal seismic isolation performance is impaired. The cost of the entire apparatus and structure can be reduced. Therefore, it is versatile and can be easily applied to ordinary houses.
(2) By providing a restraining means for restraining the movement of the sphere at the time of slight vibration on the dish member, it is possible to prevent malfunction of the rolling buffer means due to minute shaking, so that the resident is uncomfortable. Can be avoided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<1> Seismic Isolation Device As shown in FIG. 1, the seismic isolation device 1 is provided between the building foundation A and the building B to prevent the vibration from the building foundation A from being directly transmitted to the building B. Is. The seismic isolation device 1 includes a pitch buffer 2 that prevents direct transmission of longitudinal vibration, and a roll buffer 3 that is provided below the pitch buffer and prevents direct transmission of lateral vibration. It is equipped with.

<2> Pitch buffering means The pitch buffering means 2 supports the compression coil spring 4 as an elastic member that can be expanded and contracted in the vertical direction so as to prevent direct transmission of pitch, and the compression coil spring 4. And a guide member 5 whose length in the vertical direction is variable following the expansion and contraction of the compression coil spring 4.
The guide member 5 is made of, for example, metal, and includes an outer cylinder member 51 arranged in the vertical direction and an inner cylinder member 52 inserted into the outer cylinder member 51, and the inner cylinder member 52 is formed on the outer cylinder member 51. On the other hand, the length in the vertical direction is variable by moving forward and backward. Attachment flanges 511 and 521 are provided at opposite longitudinal ends of the outer cylinder member 51 and the inner cylinder member 52, respectively.
The compression coil spring 4 is disposed on the outer periphery of the outer cylinder member 51 and the inner cylinder member 52. At this time, the compression coil spring 4 may be prevented from falling off by being sandwiched between the mounting flanges 511 and 521. Here, however, a male screw portion 512 is formed on the outer periphery of the outer cylindrical member 51, and this The adjustment nut 513 is screwed onto the male screw part 512. Then, the compression coil spring 4 is positioned so as to be sandwiched between the adjustment nut 513 and the mounting flange 521 of the inner cylinder member 52. With such a configuration, the elastic force of the compression coil spring 4 can be freely set by adjusting the screwing position of the adjustment nut 513 to the male screw portion 512. The male screw portion 512 and the adjustment nut 513 provided on the guide member 5 constitute an elastic force adjusting means.

  Between the both ends of the guide member 5, a restricting elastic member that deforms following the expansion and contraction of the compression coil spring 4 is attached so that the maximum length in the vertical direction of the guide member 5 can be restricted. The outer cylinder member 51 and the inner cylinder member 52 are prevented from coming off. More specifically, a leaf spring 53 as a restricting elastic member is attached so as to span between the outer cylinder member 51 and the inner cylinder member 52. The leaf spring 53 can be attached to the adjustment nut 513 and the attachment flange 521 of the inner cylinder member 52 with a bolt (not shown) or the like. That is, here, between the both end portions of the guide member 5 means between the adjustment nut 513 and the mounting flange 521 of the inner cylinder member 52. A plurality of leaf springs 53 may be provided in the circumferential direction of the outer cylinder member 51 and the inner cylinder member 52, for example, two so as to be opposed in the circumferential direction.

<3> Roll buffer means The roll buffer means 3 is a sphere 6 that can move integrally with the pitch buffer means 2 in the lateral direction so as to prevent direct transmission of the roll, and a mortar on which the sphere 6 is placed. And a dish member 7 having an inclined surface 71. The spherical body 6 and the dish member 7 can be made of metal, for example.
For example, the spherical body 6 is provided so as to be rotatable through an annular or cylindrical bearing 61 provided integrally with a lower end portion of the pitch buffering means 2, that is, an attachment flange 521 of the inner cylinder member 52. In this case, it is preferable to integrally provide a reinforcing flange 62 for preventing deformation of the bearing 61 on the outer periphery of the opening end portion of the bearing 61.
Note that the sphere 6 may be integrally provided at the lower end of the pitch buffering means 2 so as to be slidable instead of rotating.

The dish member 7 is formed in a circular shape, for example. The inclination angle of the inclined surface 71 of the dish member 7 can be, for example, within 5 degrees, more preferably 2 to 3 degrees.
In the central portion of the inclined surface 71 of the dish member 7, a concave portion 72 for positioning the spherical body 6 is formed. The concave portion 72 functions as a restraining means for preventing the movement of the sphere 6 at the time of slight vibration. The concave portion 72 is formed so that, for example, the sphere 6 is accommodated to a depth of 6 to 13% with respect to the diameter of the sphere 6 itself (specifically, when the diameter of the sphere 6 is 80 mm, it is approximately 5 to 10 mm). Can be formed to fit deep). If the accommodation depth of the spherical body 6 in the concave portion 72 is less than 6% of the diameter of the spherical body 6, the spherical body 6 may be disengaged and moved even by slight vibration, and a sufficient restraining effect may not be obtained. This is because if the diameter exceeds 13%, the sphere 6 cannot move even during large vibrations and a sufficient buffering effect may not be obtained. The concave portion 72 is formed to have a curvature that is substantially equal to or slightly larger than the curvature of the sphere 6, for example, so that the fitted sphere 6 does not rattle.

<4> Installation of Seismic Isolation Device In order to install the seismic isolation device 1 in a building such as a residential house, the plate member 7 is attached to the building foundation A and the pitch buffer 2 is attached to the building B. More specifically, for example, it is mounted on a concrete building foundation A by means of an L-shaped anchor 8 provided on the back surface (the surface opposite to the inclined surface 71) or the outer periphery of the dish member 7, and the pitch buffer means 2. The mounting flange 511 of the outer cylinder member 51 is attached to a steel frame provided at the bottom of the building B by welding, bolts (not shown) or the like. Thereby, the building B is supported on the building foundation A through the seismic isolation device 1, and a seismic isolation structure is comprised.
It is preferable to install a plurality of seismic isolation devices 1 at predetermined intervals, for example.
Note that the seismic isolation device 1 may be installed upside down. That is, the plate member 7 may be attached to the building B, and the pitch buffering means 2 may be attached to the building foundation A.

<5> Action of Seismic Isolation Device As shown in FIG. 2, the longitudinal shock absorbing means 2 is expanded and contracted while the inner cylindrical member 52 advances and retreats with respect to the outer cylindrical member 51 during vibration, and the compression coil spring 4 is elastically deformed. This prevents the vertical vibration from being directly transmitted to the building B. At this time, the leaf spring 53 also follows and elastically deforms.
As shown in FIG. 3, the roll buffer means 3 is configured such that when the sphere 6 is detached from the recess 72 during vibration and rotates on the inclined surface 71 of the plate member 7, the building B is subjected to horizontal vibration. Prevent direct transmission. Since the inclined surface 71 of the dish member 7 is formed in a mortar shape, the spherical body 6 returns to the center position of the dish member 7 and fits into the recess 72 again when the vibration is stopped.
Further, at the time of slight vibration, the spherical body 6 is restrained because it does not come off from the recessed portion 72 in which it is fitted.

<6> Example of seismic isolation structure change (see Fig. 4)
In addition to the seismic isolation device 1, the seismic isolation structure may be configured by additionally providing an auxiliary elastic member 9 as an auxiliary pitch buffer means between the building foundation A and the building B. The auxiliary elastic member 9 has a coil spring main body 91 as an elastic member main body arranged in the vertical direction, and is configured by providing attachment members 92 at both ends of the coil spring main body 91 in the vertical direction. The attachment member 92 includes a cylindrical portion 921 inserted into the coil spring main body 91 and attachment flange portions 922 provided at different longitudinal ends of the respective cylindrical portions 921. The coil spring main body 91 is preferably fixed to the mounting flange 922 by welding or the like at both longitudinal ends.
The auxiliary elastic member 9 attaches the attachment flanges 922 to the building foundation A and the building B, respectively, and interposes between the building foundation A and the building B. More specifically, one attachment flange 922 is attached to the building foundation A by a chemical anchor (not shown) or the like, and the other attachment flange 922 is attached to the bottom of the building B by welding or a bolt (not shown) or the like. Attach it to the steel frame.
The auxiliary elastic member 9 elastically expands and contracts to prevent direct transmission of vertical vibrations, and can be deformed so as to follow lateral displacement, thereby assisting in preventing direct transmission of horizontal vibrations. . By using the auxiliary elastic member 9 having such a simple configuration, the number of seismic isolation devices 1 can be reduced, and therefore the cost of the entire seismic isolation structure can be further reduced.

The figure which shows the seismic isolation structure using the seismic isolation apparatus of this invention Diagram showing pitch buffering means Diagram showing roll buffering means The figure which shows the example of a change of the seismic isolation structure of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seismic isolation device 2 Pitch buffer means 3 Roll buffer means 4 Compression coil spring (elastic member)
5 Guide member 6 Sphere 7 Plate member 9 Auxiliary elastic member (auxiliary pitch buffer)
53 Leaf spring (elastic member for regulation)
71 Inclined surface 72 Recessed part (restraint means)
A Building foundation B Building

Claims (7)

A seismic isolation device installed between the building and the building foundation,
Pitch buffer means for preventing pitch from the building foundation from being transmitted directly to the building;
It is provided on the lower side of the pitch buffer means, and consists of roll buffer means for preventing the roll from the building foundation from being directly transmitted to the building,
The pitch buffer means is an elastic member that can be expanded and contracted in the vertical direction to prevent direct transmission of pitch,
A guide member that supports the elastic member and varies in length in the longitudinal direction following the expansion and contraction of the elastic member,
The roll buffer means is a sphere that can move integrally with the pitch buffer means in a lateral direction so as to prevent direct transmission of rolls,
A dish member having a mortar-shaped inclined surface for placing the sphere,
Seismic isolation device. The seismic isolation device according to claim 1,
A seismic isolation device, wherein the plate member is provided with a restraining means for restraining movement of the sphere at the time of slight vibration. The seismic isolation device according to claim 2,
The seismic isolation device according to claim 1, wherein the restraining means is a recess formed at a central portion of the inclined surface of the dish member and capable of positioning the sphere. A seismic isolation device according to any one of claims 1 to 3,
The seismic isolation device according to claim 1, wherein the guide member is provided with an elastic force adjusting means for adjusting an elastic force of the elastic member. The seismic isolation device according to any one of claims 1 to 4,
A restriction elastic member that deforms following the expansion and contraction of the elastic member is attached between both ends of the guide member, and the maximum length in the vertical direction of the guide member is configured to be restricted. Seismic device. A seismic isolation structure that prevents vibration from the building foundation from being transmitted directly to the building,
Using the seismic isolation device according to any one of claims 1 to 5,
The upper end of the pitch buffer means is attached to the building foundation, the dish member is attached to the building, and the pitch from the building foundation is directly transmitted to the building by the pitch buffer means. And preventing the rolling from the building foundation from being directly transmitted to the building by the rolling buffering means,
Seismic isolation structure. The seismic isolation structure according to claim 6,
A seismic isolation structure characterized in that auxiliary pitch buffer means is additionally interposed between the building foundation and the building.

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