JP2007146931A - Quake-absorbing equipment and quake-absorbing structure with usage of its quake-absorbing equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide quake-absorbing equipment and a quake-absorbing structure using the quake-absorbing equipment capable of exhibiting an enhanced quake-absorbing effect with respect to a supported body by a simple structure. <P>SOLUTION: This quake-absorbing equipment is provided with a lower member including a lower flange fixed to a supporting body and a bearing arranged in a position separated from the lower flange, an upper member including an upper flange fixed to the supported body and a bearing arranged in a position separated from the upper flange, and a regulating member interposed between the upper member and the lower member. The upper member and the lower member are connected to each other like a chain so that the bearing of the upper member is arranged between the lower flange and the bearing of the lower member, and the end of the regulating member is pivotally coupled between the lower flange and the bearing part of the lower member, and the other end of the regulating member is pivotally coupled between the upper flange and the bearing part of the upper member. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present application relates to a seismic isolation device and a seismic isolation structure using the seismic isolation device that can absorb horizontal and vertical displacements with a simple structure.

  Conventional seismic isolation devices provide a support structure with a ball between a support and a supported body to absorb horizontal displacement by the rolling of the ball, or between a support and a supported body, A vibration absorber such as a laminated rubber was interposed to absorb vertical displacement, thereby preventing vibrations due to earthquakes and the like from being directly transmitted to structures such as buildings.

JP 2001-288929 A JP 2003-097642 A

However, conventional seismic isolation devices have the following problems.
<1> Since the seismic isolation device using the ball bearing structure has a wide amplitude range due to the earthquake, the ball will come off the bearing and will not return to its original position. It was necessary to take measures.
The above measures have complicated the structure of the seismic isolation device and at the same time have increased cost, and cannot be used for low-priced structures such as houses.
<2> The seismic isolation device interposing the vibration absorber is also expensive due to high maintenance costs and cannot be used for low-priced structures such as houses.

  Accordingly, an object of the present application is to provide a base isolation device that exhibits a high base isolation effect with respect to a supported body with a simple structure and a base isolation structure using the base isolation device.

Therefore, a first invention of the present application made to achieve the above object is a seismic isolation device installed between a support and a supported body, and is separated from a lower flange and a lower flange fixed to the support. A lower member including a support portion provided at a position to be supported, an upper flange fixed to a supported body, an upper member including a support portion provided at a position spaced apart from the upper flange, and an interposition between the upper member and the lower member The upper member and the lower member are connected in a chain so that the support portion of the upper member is disposed between the lower flange and the support portion of the lower member, and the restriction member One end of the lower member is pivotally connected between the lower flange and the support portion of the lower member, and the other end of the restricting member is pivotally connected between the upper flange of the upper member and the support portion. To provide seismic isolation devices .
A second invention of the present application provides the seismic isolation device according to the first invention of the present application, wherein an elastic member is attached to one end of the regulating member.
The third invention of the present application is a seismic isolation structure that prevents the vibration from the support from being transmitted directly to the supported body, and uses the seismic isolation device according to the first invention of the present application, The lower flange of the seismic device is attached to the support body, and the upper flange of the seismic isolation device is attached to the supported body, and the horizontal vibration from the support body is directly transmitted to the supported body by the restriction member. It is intended to provide a seismic isolation structure that is characterized by preventing this.
According to a fourth aspect of the present invention, there is provided a seismic isolation structure for preventing a vibration from a support from being directly transmitted to a supported body, wherein the seismic isolation device according to the second aspect of the present invention is used, The lower flange of the seismic device is attached to the support body, and the upper flange of the seismic isolation device is attached to the supported body, and the horizontal vibration from the support body is directly transmitted to the supported body by the restriction member. The seismic isolation structure is characterized in that the elastic member prevents the vertical vibration from the support from being directly transmitted to the supported body.
Further, a fifth invention of the present application is the seismic isolation structure according to the third or fourth invention of the present application, wherein the seismic isolation device is mounted by replacing the upper and lower ends of the seismic isolation device. It is to provide.
A sixth invention of the present application is the seismic isolation structure according to any one of the third to fifth inventions of the present application, wherein a plurality of seismic isolation devices are interposed between the support and the supported body. It is intended to provide a seismic isolation structure characterized by that.

  In the present application, at least one of the following effects can be obtained by means for solving the above-described problems.

<1> With a simple structure, a high seismic isolation effect can be obtained in the horizontal direction.
<2> Since the restricting member is a suspension type, it can be restored to its original state by its own weight even after vibration is generated, and can be made maintenance-free.
<3> A seismic isolation effect can be obtained in the vertical direction by attaching an elastic member to the regulating member.

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

<1> Overall configuration The seismic isolation device 1 is interposed between the support A and the supported body B to prevent vibration from the support A from being directly transmitted to the supported body B. Alternatively, it is intended to reduce.
Here, the supported body B includes everything from small objects such as racks to large objects such as general houses.
FIG. 1 is an external perspective view of Example 1 of the seismic isolation device of the present application. FIG. 2 is a front view of the seismic isolation device 1 in FIG.
The seismic isolation device 1 of the present application includes a lower flange 21 fixed to the support A and a lower member 2 including a support portion 22 provided at a position separated from the lower flange 21, and an upper flange 31 fixed to the supported body B. The upper member 3 including the support portion 32 provided at a position separated from the upper flange 31 and the restricting member 4 interposed between the upper member 3 and the lower member 2 are the main constituent features.
Below, each component requirement is demonstrated.

<2> Lower member 2 and upper member 3
In the present embodiment, the lower member 2 and the upper member 3 can use the same member, but in this embodiment, for convenience, the names of the lower member 2 and the upper member 3 are distinguished, and in the next paragraph, Will describe the lower member 2 and the upper member 3 in parentheses.

The lower member 2 (upper member 3) is separated from the rectangular lower flange 21 (upper flange 31), which is a fixed surface to the support A (supported body B), and the lower flange 21 (upper flange 31). The bearing part 22 (32) provided in the position is included.
Between the lower flange 21 (upper flange 31) and the support portion 22 (32), among the four sides of the lower flange 21 (upper flange 31), the side wall 23 (33) that rises in a conical shape from two opposite sides. ).
That is, an annular frame member is formed by the lower flange 21 (upper flange 31), the support portion 22 (32), and the side wall 23 (33).
In addition, the joining method of the lower flange 21 (upper flange 31), the support part 22 (32), and the side wall 23 (33) uses well-known joining methods, such as welding.

A bolt insertion hole (not shown) is drilled in the lower flange 21 and is fixed to the support A such as a foundation by a fixing tool such as an anchor bolt inserted through the bolt insertion hole. Similarly, a bolt insertion hole (not shown) is also perforated in the upper flange 31 and is fixed to a supported body B such as a foundation of a building by a fixing tool such as a bolt inserted into the bolt insertion hole.
The support 22 is provided with an opening 221 through which the regulating member can be inserted.

  In the present embodiment, the upper member 3 and the lower member 2 do not have to be the same member, and the lower flange 21, the upper flange 31, and the regulating member 4, which are fixed surfaces to the support A or the supported body B. The shape is not particularly limited as long as the upper member and the lower member are relatively movable in the vertical direction and the horizontal direction.

<3> Restriction member 4
As the regulating member 4 in the present embodiment, a rod-shaped member or a known member such as a wire rope can be used.
The restricting member 4 according to the figure is a rod-shaped steel member having a diameter that can be inserted into the openings 221 and 321 provided in the support portions 21 and 31.
In the vicinity of both ends of the restricting member 4, there are a hemispherical receiving portion 41 having a diameter larger than the diameter of the opening and a screwing portion 42, and the screwing portion 42 is screwed with a nut 43 to pivot. Form a structure.

[Arrangement of each component]
Next, the arrangement | positioning form of each component which comprises the seismic isolation apparatus of this application is demonstrated.

As shown in FIG. 1, the seismic isolation device of the present application is connected in a chain shape so that the side wall 33 of the upper member does not buffer the side wall 23 of the lower member.
For example, when a member having the same shape is used for the upper member 3 and the lower member 2, one side is inverted up and down, and further rotated by 90 degrees about the vertical direction as a rotation axis, thereby connecting the side walls 23 and 33. Buffering can be reduced.

  Explaining in more detail the form in which the upper member 3 and the lower member 2 are connected in a chain shape, the support portion 32 of the upper member 3 is disposed between the lower flange 21 and the support portion 22 of the lower member 2. At the same time, the support portion 22 of the lower member 2 is disposed between the upper flange 31 and the support portion 32 of the upper member, and constitutes a suspended structure.

  With respect to the restriction member 4, one end is pivotally connected between the lower flange 21 and the support part 22 of the lower member 2, and the other end of the restriction member 4 is the upper flange 31 and the support part 32 of the upper member 3. It is pivotally connected between. At this time, the receiving member 42 and the nut 43 at both ends prevent the regulating member 4 from falling out of the openings 221 and 321, and the vertical and horizontal relative movement distances between the upper member 3 and the lower member 2. Is regulated.

[Operation of seismic isolation device]
Next, the operation of the seismic isolation device of the present application will be described.

[Standby]
FIG. 3 shows an installation example of the seismic isolation device of the present application. A plurality of seismic isolation devices 1 are interposed on a foundation that is a support, and a building is placed and fixed thereon. A state in which the longitudinal axis direction of the regulating member 4 of the seismic isolation device 1 is balanced in a state in which the longitudinal direction is maintained parallel to the vertical direction is defined as a standby state of the seismic isolation device of the present application.

[When an earthquake occurs]
FIG. 4 is a schematic diagram illustrating the operation of the seismic isolation device when an earthquake occurs.
When the support A vibrates in the horizontal direction due to an earthquake or the like, the lower member 2 moves in the horizontal direction relative to the upper member 3 due to the support structure of the restriction member 4 and the support portions 22 and 32 in the seismic isolation device 1. The transmission of vibration to the upper member 3 can be reduced.
Specifically, the receiving portion 41 provided at the end of the regulating member 4 freely rotates in all directions with the supporting portion 22 as a fulcrum, so that the horizontal vibration received by the upper member 3, that is, the supported body A, is generated. Absorbed and reduced.
In addition, after the occurrence of the earthquake, the seismic isolation device 1 is naturally restored to the standby state by the weight of the supported body B, so that the support structure is not released each time an earthquake occurs and a stable seismic isolation effect is obtained. be able to.

FIG. 5 is a front view of Embodiment 2 of the seismic isolation device of the present application, and shows a seismic isolation device that can obtain a seismic isolation effect not only for horizontal vibration but also for vertical vibration.
In the seismic isolation device 1 according to the second embodiment, a wire rope is used as the regulating member 4, and one end of the wire rope is supported on the support portion 22 by the receiving portion 42 and the nut 43. The wire rope is folded back in the horizontal direction by a caster 5 provided between the lower flange 21 and the support portion 32, and the other end is attached to the elastic member 6 via the flange portion 7.

When pitching occurs in the seismic isolation device 1 due to an earthquake or the like, the support A vibrates in the vertical direction. The vibration of the support A is transmitted to the lower member 2, but the vibration is absorbed by the elastic force of the elastic member 6 attached to the regulating member 4, and the vertical vibration received by the upper member 3 and the supported body B. Can be reduced.
Further, with respect to rolling, the upper member 3, that is, the supported body A is supported by the support structure of the one end portion of the regulating member 4 and the support portion 22 of the lower member 2, as in the seismic isolation device of the first embodiment of the present application. Vibration in the horizontal direction received by the is reduced. Further, as described above, after the occurrence of an earthquake, the stand-by state is restored by the weight of the supported body B, so that a stable seismic isolation effect can be obtained even with respect to vertical shaking.

  As explained above, the seismic isolation device of the present application and the seismic isolation structure using the seismic isolation device are suspension-type, so that the structure is simple and low cost, and the support structure is released every time an earthquake occurs. In addition, because it is less prone to failure and can be easily maintained, it has many advantages such as being easy to maintain, and can provide seismic isolation effects at low cost to general buildings such as houses. is there.

The external appearance perspective view of Example 1 of the seismic isolation apparatus of this application. The front view of the seismic isolation apparatus in FIG. Schematic which shows the example of installation of the seismic isolation apparatus of this application. Schematic which shows the effect | action of the seismic isolation apparatus at the time of an earthquake occurrence. The front view of Example 2 of the seismic isolation apparatus of this application.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seismic isolation device 2 Lower member 21 Lower flange 22 Bearing part 23 Side wall 3 Upper member 31 Upper flange 32 Bearing part 33 Side wall 4 Restriction member 41 Screwing part 42 Receiving part 43 Nut 5 Caster 6 Elastic member 7 collar part

Claims (6)

A seismic isolation device installed between a support and a supported body,
A lower member including a lower flange fixed to the support and a support provided at a position spaced from the lower flange;
An upper member including an upper flange fixed to a supported body and a support portion provided at a position separated from the upper flange;
A regulating member interposed between the upper member and the lower member,
The upper member and the lower member are connected in a chain shape so that the support portion of the upper member is disposed between the lower flange and the support portion of the lower member,
One end of the restricting member is pivotally connected between the lower flange of the lower member and the support portion,
The other end of the restricting member is pivotally connected between the upper flange of the upper member and the support portion,
Seismic isolation device. The seismic isolation device according to claim 1, wherein an elastic member is attached to one end of the regulating member. A seismic isolation structure for preventing a vibration from a support from directly transmitting to a supported body, wherein the base isolation device according to claim 1 is used, and a lower flange of the seismic isolation device is attached to the support. An upper flange of the seismic isolation device is attached to a supported body, and the regulating member prevents horizontal vibration from the support body from being directly transmitted to the supported body. Seismic structure. A seismic isolation structure for preventing a vibration from a support from directly transmitting to a supported body, wherein the base isolation device according to claim 2 is used, and a lower flange of the seismic isolation device is attached to the support. An upper flange of the seismic isolation device is attached to the supported body, and the restricting member prevents horizontal vibration from the supporting body from being directly transmitted to the supported body, and the elastic member is used to A seismic isolation structure characterized in that vertical vibrations from the support are prevented from being directly transmitted to the support. 5. The seismic isolation structure according to claim 3, wherein upper and lower ends of the seismic isolation device are replaced and attached. 6. The seismic isolation structure according to claim 3, wherein a plurality of seismic isolation devices are interposed between the support body and the supported body.

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