JP2001329718A - Base isolator, building with base isolator, and method of constructing the building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely reduce an earthquake motion also for a lightweight building, and increase a durability of the building. SOLUTION: In a base isolator 5 a synthetic rubber material 51 is formed of a pure member. Namely, a conventional metal plate is not stacked on the rubber material. Accordingly, the rubber material can be surely and sufficiently deformed elastically and, even when a building body 4 is lightweight, the rubber material can satisfactorily absorb a vibration energy. In an integral unit formed of the synthetic rubber material 51 and a sliding support 53 the synthetic rubber material 51 is covered by the sliding support 53. Thus in the synthetic rubber material 51 installed along the outer periphery of a building, the material thereof can be prevented from being deteriorated by suppressing the effect of an external environment such as wind and rain, and not only the durability of the synthetic rubber material 51 but also the durability of the base isolator 5 can be increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a seismic isolation device, a building provided with the seismic isolation device, and a method of constructing the building, and can be used, for example, in a lightweight detached house such as a wooden building.

[0002]

2. Description of the Related Art Conventionally, seismic isolation systems having an effect of absorbing vibration energy during an earthquake have been developed mainly for large RC or SRC buildings such as condominiums and office buildings. In recent years, in order to adopt the seismic isolation construction method for wooden buildings that occupy the majority of the number of building starts per year, development research has been started by housing manufacturers, general construction contractors, and seismic isolation equipment manufacturers.

In such a situation, the inventor has proposed a seismic isolation construction method described in Japanese Patent Application Laid-Open No. 10-252313. This seismic isolation method is a method in which a plurality of pile foundations are driven at predetermined intervals to adjust the level, then a steel floor frame is constructed on each pile foundation, and the base is placed on this. By installing a seismic isolation device consisting of a restoring device between the foundation and the steel floor frame, the vertical force supporting function of the upper building body including the steel floor frame, and the vibration damping and position restoring functions (damping and (Restoring function).

[0004] Specifically, the seismic isolation device has a structure in which a rubber material and a metal plate are stacked in a plurality of layers vertically, and exhibits a restoring function against earthquake motion by elastic deformation of the rubber material, and absorbs vibration energy. In addition, a rubber material is combined with a metal plate to support the vertical force of the building and have a damping function.

[0005]

However, since the metal plate used for the seismic isolation device described in the above publication acts to impair the elasticity of the entire seismic isolation device, when the building is lighter, There is a possibility that the seismic isolation device cannot be easily elastically deformed and the vibration energy cannot be sufficiently absorbed, so that the seismic motion cannot be sufficiently reduced. Further, since the seismic isolation device is exposed between the foundation and the steel floor frame, there is a concern that the rubber material arranged particularly along the outer periphery of the building may be degraded by the external environment such as wind and rain or the outside air. Therefore, in a seismic isolation device using a rubber material, it is desired to take measures for imparting sufficient durability.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a seismic isolation device, a building equipped with a seismic isolation device, and a method of constructing the building, which can reliably reduce seismic motion even in a lightweight building and improve durability. Is to provide.

[0007]

According to a first aspect of the present invention, there is provided a seismic isolation device which is fixed between a foundation and a main body of a building. A metal leaf spring for supporting the vertical force of the building. In such a configuration, since a plurality of leaf springs arranged around the restoration device support the vertical force of the building, there is no need to stack a metal plate on the restoration device as in the related art. For this reason, the restoring device may be made of, for example, a synthetic resin made of a single rubber material, so that even when the building is lighter, seismic motion can be reliably absorbed. Further, since such a restoring device is surrounded by a plurality of leaf springs, it is difficult for the rain and the like to hit the restoring device, and the durability of the restoring device and thus the seismic isolation device is improved. In this seismic isolation device, a restoring device made of rubber or the like mainly has a restoring function when an earthquake occurs, and a leaf spring mainly has a vertical force supporting function and a damping function.

A seismic isolation device according to a second aspect of the present invention is provided with a sliding bearing which is arranged apart from the restoring device and the leaf spring and is provided so as to support a vertical force of the building. It is characterized by. In such a configuration, the vertical force supporting function of the sliding bearing makes it possible to reduce the number of restoring devices and the number of leaf springs installed. Therefore, the horizontal rigidity of the seismic isolation layer formed by the seismic isolation device is kept low. Can be As a result, the seismic isolation layer comes closer to the insulating state, and the seismic isolation effect is further improved. Also, since the damping function can be expected from the sliding bearing, the damping ability required for the leaf spring is reduced, and the leaf spring can bear only the vertical force. As described above, the ability of each member is further limited, so that each member can be manufactured after being narrowed down to appropriate performance.

According to a third aspect of the present invention, there is provided a seismic isolation device including a synthetic resin restoring device and a damper which are fixed between the foundation and the building body while being separated from each other, and at least one of the restoring device and the damper is provided. The building is covered with a sliding bearing that supports the vertical force of the building. In such a configuration, since the vertical force of the building is supported by the sliding bearing, it is not necessary to stack a metal plate on the restoring device as in the prior art, as in the case of the first aspect of the invention. It is possible to form a restoration device with synthetic resin
Even if the building is lighter, it ensures that the ground motion is absorbed. Also, since such a restoring device is covered with a sliding bearing, it is difficult for wind and rain to hit the restoring device,
The durability of the seismic isolation device is improved. In this seismic isolation device, a restoration device such as a rubber material mainly has a restoration function in the event of an earthquake, a sliding bearing has a vertical force support function, and a damper has a damping function.

According to a fourth aspect of the present invention, in the seismic isolation device, the sliding bearing is provided with a plate-shaped member fixed to one of the foundation and the building body, and the restoring device fixed to the other. It is characterized by comprising a cover member and a slidable member between the plate member and the cover member. In such a configuration, one of the sliding surfaces of the sliding bearing is formed to be large on the building body side or the foundation side by the plate-like member, so that the building body has a large area even during horizontal displacement, and has a certain area. And is favorably and stably supported.

In a seismic isolation device according to a fifth aspect of the present invention, the sliding bearing includes a lower member fixed to the foundation side and an upper member fixed to the building body.
The upper and lower members have substantially the same shape and are slidably provided between the upper and lower members. In such a configuration, the restoration device is covered by vertically moving the upper member and the lower member. At this time, the sliding surface is set at a substantially middle height position between the foundation and the building body. Therefore, it is possible to make the entire sliding bearing smaller than the sliding bearing according to the fourth aspect. Therefore, the seismic isolation device can be easily handled at the time of installation work at the site. Further, since the upper member and the lower member have the same shape, only one kind of main member constituting the sliding bearing may be used, and the number of members can be reduced to reduce the member cost.

In a seismic isolation device according to a sixth aspect of the present invention, the damper is any one of a spring damper, a hydraulic damper, and a rod-shaped metal member.
The spring damper, the hydraulic damper, and the rod-shaped metal member have high technical perfection, and the reliability as the damper is improved.

A seismic isolation device according to a seventh aspect of the present invention is a synthetic resin restoring device fixed between a foundation and a building body, and a sliding bearing that covers the restoring device and supports a vertical force of the building. The damping performance is exhibited by the frictional resistance of the sliding surface provided on the sliding bearing. In such a configuration, the damping function is secured without separately providing a damper, and the seismic isolation device is inexpensive because the damper is unnecessary. Needless to say, as in the case of the third aspect of the present invention, even for a light-weight building, the seismic motion is reliably reduced, the durability is improved, and the object of the present invention is achieved.

[0014] A seismic isolation device according to claim 8 of the present invention is connected between the foundation and the building body, and is fixed between the foundation and the building body when an external force exceeding a predetermined magnitude acts on the building. A release means for releasing the state is provided. Here, the "predetermined magnitude" refers to the magnitude of an external force applied to the building by daily wind pressure (including a typhoon). Hereinafter, the same applies. In such a configuration, by providing the release means, the shaking of the building due to daily wind pressure is suppressed, so that the so-called seasickness phenomenon is prevented, and the livability of the building is improved.

In the seismic isolation device according to a ninth aspect of the present invention, the coefficient of static friction of the sliding surface provided on the sliding bearing is determined by the sliding of the sliding bearing when an external force exceeding a predetermined magnitude acts on the building. Is set to a size at which to start. In such a configuration, the sliding bearing does not slide and the seasickness phenomenon does not occur to the extent that ordinary wind pressure acts on the building. That is, the sliding bearing functions as a releasing means of claim 8. Therefore, the seasickness phenomenon can be suppressed without separately providing the releasing means, and the seismic isolation device is inexpensive because the releasing means is unnecessary.

According to a tenth aspect of the present invention, a building is provided with the seismic isolation device according to any one of the first to ninth aspects. Even in such a building, the above object is achieved by the operation and effect of the seismic isolation device.

[0017] A building according to claim 11 of the present invention is characterized in that the foundation is a pile foundation, and in such a configuration, a plurality of pile foundations are cast at predetermined intervals. In addition, compared with the conventional cloth foundation, the construction is easier, the construction period can be shortened, and the ventilation efficiency under the floor is improved.

According to a twelfth aspect of the present invention, a method for constructing a building includes a step of placing a foundation and installing the seismic isolation device according to any one of the first to sixth aspects above the foundation. It is characterized by being constructed through a process and a process of building a building body on the upper part of the seismic isolation device. Even with such a construction method, the above object is achieved by the operation and effect of the seismic isolation device.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. [First Embodiment] FIG. 1 is an exploded perspective view schematically showing the whole of a building built using the seismic isolation device of the present invention.
In FIG. 1, a building 1 includes a plurality of pile foundations 2 disposed at intervals, a frame-shaped steel floor frame 3 erected on each pile foundation 2, and a building body built on the upper part of the steel floor frame 3. 4, a pile foundation 2 and a steel frame 3
The seismic isolation device 5 is installed between them.

The pile foundation 2 is made of a pile made of RC or steel, and the level of the pile head is adjusted by a method according to the material. Although illustration is omitted, the details are as follows.

When the pile foundation 2 is a pile made of RC, the pile is cast on the ground, then the level is checked and blackout is performed, and an excess upper end is cut off based on the blackout. And while placing the formwork around the upper side of the pile, concrete is poured into the formwork so as to bury the upper end of the pile,
The upper surface of the cast concrete is adjusted to a regular level. The base reinforcement and the anchor bolts for fixing the steel floor frame 3 are previously arranged in the formwork before concrete is cast.

On the other hand, when the pile foundation 2 is a pile made of steel, after the pile is cast on the ground, the level is checked and blacking is performed. Etc. may be used for cutting. A member for receiving the seismic isolation device 5 is fixed to the upper end side of the pile by welding or the like.

As shown in FIGS. 2 and 3, the steel floor frame 3 has a structure in which a plurality of H-shaped steel members 31 are assembled in a lattice frame shape. In the present embodiment, a plurality of types of H-shaped steels 31 having different cross-sectional sizes are used, but the sizes of the H-shaped steels 31 used may be unified. In addition to the cross-sectional size of the H-section steel 31, its length, arrangement position, joining position, joining structure, and the like are as follows:
It may be arbitrarily determined in consideration of the floor area and the floor plan of the building main body 4, and is not limited to those shown in FIGS. Further, a channel steel may be used in place of the H-shaped steel 31, and the cross-sectional shape of the steel material used is arbitrary.

In such a steel floor frame 3, the horizontal braces 32 are placed in the rectangular section formed by the H-section steel 31.
And sufficient flat (horizontal) rigidity is secured. When the horizontal braces are not used, the striking beams are appropriately arranged at the corners in the section. In the steel frame 3 shown in FIG. 1, only the main H-shaped steel 31 is shown, and other H-shaped steels and braces (fire struts) are omitted.

As shown in FIG. 3, the building body 4 includes a base 41 bolted on a steel floor frame 3 and a floor panel 4.
2. It is a wooden building with a panel method using various panels in addition to the outer wall panel 43. The building construction method is not limited to the panel construction method, but may be a conventional frame construction method or a 2 × 4 construction method. Further, the building body 4 may be a lightweight steel frame building instead of a wooden building.

As shown in FIGS. 1 and 3, the seismic isolation device 5
Plural synthetic rubber materials 51 as restoration device made of synthetic resin
And a combination of a plurality of spring dampers 52 as a damper, and each of the synthetic rubber material 51 and the spring damper 52 is integrally provided with a sliding bearing 53,
They are unitized with each other.

Synthetic rubber material 51 and spring damper 52
Are arranged between different pile foundations 2 and the steel frame 3 and are separated from each other. FIG. 2 shows an arrangement position of the seismic isolation device 5 with respect to the steel floor frame 3 in the present embodiment, and a unit using a synthetic rubber material 51 is shown in a hatched portion in a two-dot chain line circle. The unit using the spring damper 52 is installed at the place indicated by the shaded dots.

The synthetic rubber material 51 is made of a solid material made of, for example, chloroprene resin, and mainly has a restoring function when an earthquake occurs. However, a joining member 511 made of a material different from rubber is provided on both upper and lower ends of the synthetic rubber material 51 in order to mediate joining with the sliding bearing 53. The spring damper 52 is a metal coil-shaped damper and has a damping function. Further, the damper may be another form such as a hydraulic damper or a rod-shaped metal member made of lead or the like.

The sliding bearing 53 supports the vertical force of the steel floor frame 3 and the building body 4, and the lower ends of the synthetic rubber material 51 and the spring damper 52 are joined to each other, and a metal cover that covers the periphery thereof. It is composed of a member 531 and a plate member 532 such as a steel plate to which the upper ends of the synthetic rubber member 51 and the spring damper 52 are joined. The covering member 531 and the plate member 532 are fixed to the pile foundation 2 and the steel frame 3 by appropriate fixing means such as welding or bolts and nuts.

Specifically, as shown in FIG. 4, the covering member 531 closes the lower part of the funnel-shaped main body part which is greatly expanded upward, and is a disk-shaped closing part 53 fixed to the pile foundation 2.
3. A flange portion 534 is provided continuously along the upper peripheral edge of the main body. The lower ends of the synthetic rubber member 51 and the spring damper 52 are fixed to the closing portion 533 of the covering member 531 by appropriate fixing means. The upper surface of the flange portion 534 is made of, for example, Teflon (registered trademark).
The sliding surface 534A has a low coefficient of friction and is processed.

The plate member 532 has a simple structure with a smooth surface. The upper ends of the synthetic rubber material 51 and the spring damper 52
The plate 532 is fixed to the approximate center of the plate 532 by an appropriate fixing means. The lower surface of the plate member 532 is also a sliding surface 532A having a low friction coefficient, which is processed with Teflon or the like.

In such a sliding bearing 53, the sliding surface 534A of the flange portion 534 and the sliding surface 532A of the plate member 532 are formed.
Come into contact with each other and slippage occurs between them. Also,
When the sliding surfaces 532A and 534A contact each other, the synthetic rubber member 51 and the spring damper 52 are completely covered by the cover member 531 and the plate member 532.

In this embodiment, after a plurality of pile foundations 2 have been driven and the level has been adjusted as described above,
A synthetic rubber material 51 integrated with the sliding bearing 53 and a spring damper 52 integrated with the sliding bearing 53 are respectively installed on the pile foundation 2. Next, the H-shaped steel 31 is erected on the pile foundation 2 (the seismic isolation device 5), and the H-shaped steels 31 are bolted to each other in a frame shape using a gusset plate or a splice plate while being fixed to the plate 532. Then, the steel frame 3 is assembled by stretching the brace 32. In addition, a small frame-shaped frame made of the H-shaped steel 31 is assembled in a factory or the like in advance, and the frame is carried into a construction site and erected, and the frame-shaped frames are joined together to complete a large steel floor frame 3. Is also good. And after installing the steel floor frame 3,
The building body 4 is erected on the upper part of the steel floor frame 3 by the above-mentioned arbitrary construction method.

According to the present embodiment, the following effects can be obtained. (1) In the seismic isolation device 5 used in the building 1, the synthetic rubber material 5
1 has a function of restoring the shaking during an earthquake, but since the synthetic rubber material 51 is a solid member and is not laminated with a conventional metal plate, it can be securely and sufficiently elastically deformed. In addition, even when the building body 4 is lightweight, vibration energy can be favorably absorbed.

(2) In the unit in which the synthetic rubber member 51 and the sliding bearing 53 are integrated, the synthetic rubber member 51 is almost completely covered with the cover member 531 and the plate member 532 of the sliding bearing 53. First, the synthetic rubber material 51 can be protected from the external environment such as wind and rain even if it is arranged along the outer circumference of the
Can be improved in durability. Second,
For example, even if a fire occurs in a neighbor's house at the time of a disaster such as an earthquake, the effect of heat on the synthetic rubber material 51 can be suppressed to a small extent, thereby preventing the deterioration of the material and the like, thereby improving the fire resistance. .

(3) The slide bearing 53 only needs to support the vertical force of the steel floor frame 3 and the building body 4 except for causing sliding between the cover member 531 and the plate member 532, so that the structure is simplified. And can be manufactured at low cost.

(4) By installing the seismic isolation device 5, the strength required for the building body 4 is reduced. The degree of freedom in design can be greatly increased.

(5) Since the sliding surface 532A of the plate member 532 is a large flat surface, as long as the flange portion 534 of the covering member 531 is in contact with this flat surface, for example, during the occurrence of horizontal shaking. However, each sliding surface 532A, 534
The contact area of A can be made constant, and the vertical force can be stably supported. And since the structure of the plate material 532 is simple,
The plate member 532 having a large area of the sliding surface 532A can be surely provided, and also in this respect, there is an effect that the vertical force can be favorably supported with a constant area.

(6) The synthetic rubber material 51 and the sliding bearing 53 are integrally unitized, and the spring damper 52 and the sliding bearing 53 are integrated.
Are integrated into a unit, so that they can be easily handled on site and can be easily fixed to the pile foundation 2 and the steel frame 3. In particular, the plate member 532 is a cover member 5
Although the plate member 532 and the cover member 531 are connected to each other via the synthetic rubber member 51 and the spring damper 52, there is a concern that the plate member 532 slips off from the cover member 531. Also, from this point, it is excellent in handling and installation workability.

(7) Since the spring damper 52 is a technically completed member such as generally used for other devices requiring a damping function, sufficient reliability can be ensured. Of course,
A similar effect can be obtained even when a rod-shaped metal member made of a hydraulic damper or lead is used instead of the spring damper 52.

Second Embodiment FIGS. 5 and 6 show a seismic isolation device 6 according to a second embodiment of the present invention. In FIGS. 5 and 6, the same components as those in the first embodiment described above are denoted by the same reference numerals, and the description thereof will be omitted. In the following, different configurations will be described in detail.
The same applies to other embodiments described later.

In the seismic isolation device 6, the configuration of the slide bearing 61 is significantly different from the slide bearing 53 of the first embodiment. The point of using the synthetic rubber material 51 and the spring damper 52 is the same as that of the first embodiment, and other configurations are substantially the same as those of the first embodiment.

The sliding bearing 61 is composed of a lower member 611 fixed to the pile foundation 2 and an upper member 612 fixed to the steel floor frame 3 on the building body 4 side. Each member 6
Numerals 11 and 612 are funnels having the same shape, and are used upside down so that the expanding sides face each other.
The lower ends of the synthetic rubber member 51 and the spring damper 52 are fixed to the closing portion 613 of the lower member 611, and the upper ends thereof are fixed to the closing portion 613 of the upper member 612.

In the lower member 611 and the upper member 612, the flange portion 61 provided on the peripheral edge on the expanding side is used.
4 are in contact with each other, and this contact surface is a sliding surface 6.
14A. When the sliding surfaces 614A are in contact with each other, the synthetic rubber material 51 and the spring damper 52 are almost completely covered. Other functions of the sliding bearing 61 are the same as those of the sliding bearing 53 of the first embodiment.

In this embodiment, the same synthetic rubber material 51 as that of the first embodiment is used.
Is covered with the sliding bearing 53, the effects (1) and (2) described above can be obtained similarly, and the object of the present invention can be achieved. In addition, with a configuration substantially similar to that of the first embodiment, (3),
The effects of (4), (6), and (7) can be obtained. in addition,
The following effects are obtained.

(8) Lower member 611 and upper member 612
The sliding surface 614A is set at a substantially intermediate height position between the pile foundation 2 and the building body 4 side.
1 can be downsized as compared to the sliding bearing 53 of the first embodiment. For this reason, the handling of the seismic isolation device 6 can be facilitated, for example, at the time of installation work at the site.

(9) Since the lower member 611 and the upper member 612 of the sliding bearing 61 have the same shape, only one kind of member is required, and the number of kinds of members can be reduced to improve productivity. At the same time, production management can be facilitated and costs can be reduced.

(10) In addition, since the members 611 and 612 have the same shape, and the synthetic rubber material 51 and the spring damper 52 have no upside down in the first place, there is no upside down even when these are unitized. The workability during installation can be improved.

[Third Embodiment] FIGS. 7 to 9 show a seismic isolation device 7 according to a third embodiment of the present invention.
The seismic isolation device 7 is composed of a combination of a synthetic rubber material 51 integrally provided with a metal leaf spring 71 and a sliding bearing 72.

As shown in FIG. 9, a plurality of (four in this embodiment) leaf springs 71 are provided so as to surround the synthetic rubber material 51, and are installed in a curved state in which an elastic force acts. . The upper and lower ends of each leaf spring 71 are located in the vicinity of the upper and lower ends of the synthetic rubber material 51, and are fixed to the metal flange member 711, the joining member 511, and the like by welding or the like. Although the flange member 711 is used for joining to the pile foundation 2 and the steel floor frame 3, the shape and the like are arbitrary, and may be a plane square or the like in addition to the plane circle shown in FIG.

Such a leaf spring 71 originally has a function of supporting the vertical force of the steel floor frame 3 and the building body 4 in addition to the damping function, and is included in the unit integrated with the synthetic rubber material 51. This is a member that makes it difficult for the synthetic rubber material 51 to elastically deform. However, in the present embodiment, by separately arranging the sliding bearing 72 having the same vertical force supporting function, the thickness of the leaf spring 71 is made thinner, and the vertical force supporting function is intentionally reduced. The restoring function of the rubber material 51 is more reliably exerted. In other words, the part where the vertical force supporting function of the leaf spring 71 is intentionally reduced is complemented by installing the slide bearing 72 separately.

The sliding bearing 72 includes a plate member 721 fixed to the pile foundation 2 and a metal slider 722 having a H-shaped cross section fixed to the steel floor frame 3. The contact surfaces of the plate member 721 and the slider 722 are made of sliding surfaces 721A and 721A having a low coefficient of friction, such as Teflon processing.
2A. As described above, such a sliding bearing 72 supports the vertical force of the steel floor frame 3 and the building body 4 to reduce the vertical force load on the leaf spring 71, and
The frictional force at the sliding surfaces 721A and 722A also provides a slight damping function.

In the seismic isolation device 7 described above, since the reduction in the vertical force supporting function of the leaf spring 71 is supplemented by the sliding bearing 72, as shown in FIG.
1 and a unit formed of a leaf spring 71 and a steel frame 3
Are installed only at the four corners, and all other portions are supported by the sliding bearings 72, so that the vertical force can be sufficiently supported. Is a unit having the synthetic rubber material 51, and the sliding bearings 72 are respectively installed at the positions indicated by shading of dots).
Note that the height level of the pile foundation 2 may be determined according to each bearing.

Also in this embodiment, the effect (1) described above can be obtained by using the pure synthetic rubber material 51.
Further, in the unit using the synthetic rubber member 51, since the periphery of the synthetic rubber member 51 is surrounded by the plurality of leaf springs 71, a gap is generated between the leaf springs 71, but it is possible to make it difficult for the wind and rain to hit the synthetic rubber member 51. Thus, an effect substantially similar to the first effect of (2) can be obtained. Therefore, the object of the present invention can be achieved. Further, the following effects are obtained by the specific configuration of the present embodiment.

(11) Since the sliding bearing 72 has a vertical load supporting function, the number of units composed of the synthetic rubber material 51 and the leaf spring 17 can be reduced, and the seismic isolation device formed by the seismic isolation device 7 can be used. The horizontal rigidity of the layer can be kept low. Thereby, the seismic isolation layer can be made closer to the insulating state, and the seismic isolation effect can be further improved. In addition, since the number of such a unit of the plate spring 71 and the synthetic rubber material 51 can be reduced,
All other locations can be accommodated by the simple and inexpensive sliding bearing 72, which is economical.

(12) Since the sliding bearing 72 can also be expected to have a damping function, the damping ability required for the leaf spring 71 can be reduced.
The leaf spring 71 can exclusively bear the vertical force.
Accordingly, the capabilities of the synthetic rubber material 51 and the leaf spring 71 are further limited, and the members 51 and 71 can be manufactured after narrowing down to appropriate performance.

(13) Due to the plurality of leaf springs 71 arranged around the synthetic rubber material 51, when a fire occurs in a neighboring house, it is possible to make it difficult for the synthetic rubber material 51 to directly hit a flame and to improve fire resistance. .

Fourth Embodiment FIG. 10 shows a seismic isolation device 8 according to a fourth embodiment of the present invention. The seismic isolation device 8 has a configuration in which the unit of the synthetic rubber material 51 and the slide bearing 53 described in the first embodiment is integrated with a spring-type stopper 81 as a releasing means.

The stopper 81 includes a pair of brackets 811 of an arbitrary shape fixed to each of the pile foundation 2 and the steel frame 3, a metal coil spring 812 provided between these brackets 811 and extending and contracting in the horizontal direction. It is composed of In the coil spring 812, the minimum load for causing expansion and contraction is set to be larger than the external force applied to the building by the daily wind pressure. Therefore, even if the building is shaken by an external force of the order of the wind pressure, the coil spring 812 does not expand or contract, so that the sliding at the sliding bearing 53 and the elastic deformation of the synthetic rubber material 51 caused by the sliding are not caused.

The number of such stoppers 81 is not necessarily required by the number of units (units in which the synthetic rubber member 51 and the sliding bearing 53 are integrated) used in the building. That is, the number of the stoppers 81 and the performance of the coil springs 812 constituting the stoppers 81 may be determined depending on how much external force is applied to the building to activate the seismic isolation function of the seismic isolation device 8.

According to the present embodiment, the object of the present invention can be achieved by using the synthetic rubber material 51 and the slide bearing 53, and the following effects are obtained by the unique configuration of the present embodiment. . (14) Since the seismic isolation device 8 is provided with the stopper 81, the seismic isolation function of the seismic isolation device 8 does not work even when external force due to daily wind pressure acts on the building, and the building and the pile foundation 2 are fixed. Can be kept. For this reason, the swaying of the building due to the wind pressure can be suppressed, so-called seasickness phenomenon can be prevented, and the livability of the building can be improved.

(15) In the stopper 81, the coil spring 812
By using the fact that the coil spring 812 does not expand and contract beyond the maximum deformation amount, the coil spring 812 can prevent excessive horizontal displacement between the building and the pile foundation 2.

(16) Since no electrical device is used for the stopper 81, the stopper 81 can be reliably operated even in the event of a disaster such as an earthquake, and has the effect of high reliability.

[Fifth Embodiment] FIG. 11 shows a seismic isolation device 9 according to a fifth embodiment of the present invention. In this seismic isolation device 9, a stopper 9 provided with a rod-shaped member 911 made of artificial synthetic fiber having little elasticity as a releasing means.
1 is used. Other configurations are substantially the same as those of the fourth embodiment. In the rod-shaped member 911, the breaking load at the time of tension and compression is set to be larger than the external force applied to the building at ordinary wind pressure, and the seismic isolation function of the seismic isolation device 9 does not work at about the wind pressure. In such an embodiment, the object of the present invention can be achieved by the same configuration as in the fourth embodiment, and the effects (14) and (16) described above can be similarly obtained by providing the stopper 91.

[Sixth Embodiment] FIG. 12 shows a seismic isolation device 10 according to a sixth embodiment of the present invention. The seismic isolation device 10 uses the unit described in the second embodiment, that is, the unit configured by the synthetic rubber member 51 and the lower member 611 and the upper member 612 constituting the sliding bearing 61. However, depending on the size of the building, etc., it is not necessary to provide the synthetic rubber material 51 in all the units used, and in some units, the synthetic rubber material 51 is thinned out as shown by a two-dot chain line in the drawing. Upper and lower members 611, 61
Only the vertical force support function may be provided by using only 2.

As described above, in such a seismic isolation device 10, the synthetic rubber material 51 has a restoring function, and the vertical force supporting function is provided by the upper and lower members 611 and 612.
The damping function is given to the frictional force of the sliding surface 614A. That is, the friction generated on the sliding surface 614A causes each member 6
The amplitude width of 11,612 gradually narrows, so that their relative sliding movement gradually stops.

The present embodiment can also achieve the object of the present invention and have the following effects. (17) In the seismic isolation device 10, since the sliding bearing 61 is provided with a damping function, there is no need to separately provide a spring or hydraulic damper, and the seismic isolation device 10 can be provided at low cost.

[Seventh Embodiment] Although a seismic isolation layer according to a seventh embodiment of the present invention is not shown, it is structurally similar to the sixth embodiment.
This is the same as the embodiment. However, in the seismic isolation device of the present embodiment, the function as the releasing means is given to the frictional force of the sliding surface 614A as described with reference to FIG. In other words, the coefficient of static friction of the sliding surface 614A is set to a size at which the sliding of the sliding bearing 61 starts when an external force greater than the external force due to daily wind pressure acts on the building.

This embodiment has the following effects in addition to achieving the object of the present invention. (18) In this seismic isolation device, since the sliding bearing 61 also serves as the releasing means as it is, the sliding bearing 61 does not slide and the seasickness phenomenon does not occur if the daily wind pressure acts on the building.
Therefore, the seasickness phenomenon can be prevented without separately providing a releasing means, and the seismic isolation device can be made inexpensive because the releasing means is unnecessary.

The present invention is not limited to the above-described embodiment, but includes other configurations capable of achieving the object of the present invention, and also includes the following modifications.
For example, although the foundation of each of the above embodiments was the pile foundation 2,
The basis according to the invention is not limited to this,
A solid foundation using a floor slab 11 or the like as shown in FIG. 13 may be used. Further, such a solid foundation may be formed by a floor slab 11 provided on a pile 13 or by casting concrete without using the pile 13.

The shape of the slide bearing covering the synthetic rubber material 51 is also arbitrary, and is not limited to the slide bearings 53 and 61 used in the first and second embodiments. In short, it suffices if the restoring device such as the synthetic rubber material 51 is covered from the surroundings so that the seismic isolation device has a structure that improves durability. Further, which of the support, the damper, and the release means is combined with the unit including the restoring device and the sliding bearing that covers the restoring device may be appropriately determined in the implementation (see FIG. 13). The same applies to a unit in which the restoration device and the leaf spring are integrated.

In addition, the materials and specific shapes of the members constituting the present invention may be arbitrarily determined as long as the object of the present invention can be achieved.

[0073]

As described above, according to the present invention, the seismic motion can be reliably reduced even in a light-weight building, and the durability can be improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of the present invention.

FIG. 2 is a plan view showing one component of the first embodiment.

FIG. 3 is a longitudinal sectional view showing a main part of the first embodiment.

FIG. 4 is an enlarged perspective view of a member constituting a main part of the first embodiment.

FIG. 5 is a longitudinal sectional view showing a main part of a second embodiment of the present invention.

FIG. 6 is an enlarged perspective view of a member constituting a main part of the second embodiment.

FIG. 7 is a plan view showing a third embodiment of the present invention.

FIG. 8 is a longitudinal sectional view showing a main part of a third embodiment.

FIG. 9 is an enlarged perspective view of a member constituting a main part of the third embodiment.

FIG. 10 is a longitudinal sectional view showing a main part of a fourth embodiment of the present invention.

FIG. 11 is a longitudinal sectional view showing a main part of a fifth embodiment of the present invention.

FIG. 12 is a longitudinal sectional view showing a main part of a sixth embodiment of the present invention.

FIG. 13 is a longitudinal sectional view showing a modification of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Building 2 Pile foundation which is a foundation 11 Floor slab which is a foundation 4 Building main body 5-10 Seismic isolation device 51 Synthetic rubber material which is a restoration device 71 Leaf spring 53, 61, 72 Sliding bearing 52 Spring damper which is a damper 532 Plate member 531 Covering member 611 Lower member 612 Upper member 81, 91 Stopper

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F16F 15/04 F16F 15/04 M

Claims (12)

[Claims] 1. A restoration device made of synthetic resin fixed between a foundation and a building body, and a plurality of metal leaf springs arranged around the restoration device and supporting a vertical force of the building. A seismic isolation device characterized in that: 2. The seismic isolation device according to claim 1, further comprising: a sliding bearing that is disposed apart from the restoring device and the leaf spring, and that is provided to support a vertical force of the building. A seismic isolation device characterized by the following. 3. A restoration device and a damper made of a synthetic resin and fixed between the foundation and the main body of the building at a distance from each other, and at least one of the restoration device and the damper supports a vertical force of the building. A seismic isolation device characterized by being covered with a sliding bearing. 4. The seismic isolation device according to claim 3, wherein the sliding bearing is a plate-shaped member fixed to one of the foundation and the building body, and the restoring device fixed to the other. It is composed of a covering member and
A seismic isolation device characterized by being slidably provided between the plate member and the cover member. 5. The seismic isolation device according to claim 3, wherein the sliding bearing includes a lower member fixed to the foundation side and an upper member fixed to the building body. The upper and lower members have substantially the same shape, and are slidably provided between the upper and lower members. 6. The seismic isolation device according to claim 3, wherein the damper is any one of a spring damper, a hydraulic damper, and a rod-shaped metal member. Seismic device. 7. A resilience device made of synthetic resin fixed between a foundation and a building body, and a slide bearing for covering the resilience device and supporting a vertical force of the building. A seismic isolation device characterized by exhibiting damping performance with the frictional resistance of the surface. 8. The seismic isolation device according to claim 1, wherein said seismic isolation device is connected between said foundation and a building body and said external force is applied when an external force exceeding a predetermined magnitude acts on said building. A seismic isolation device comprising a release means for releasing a fixed state between a foundation and a building body. 9. The seismic isolation device according to claim 2, wherein the coefficient of static friction of a sliding surface provided on the sliding bearing is such that an external force exceeding a predetermined magnitude acts on the building. A seismic isolation device characterized in that it is set to a size such that the sliding bearing starts to slide when the sliding bearing is turned on. 10. A building provided with the seismic isolation device according to any one of claims 1 to 9. 11. A building provided with the seismic isolation device according to claim 10, wherein the foundation is a pile foundation. 12. A step of placing a foundation, a step of installing the seismic isolation device according to any one of claims 1 to 6 above the foundation, and a building main body above the seismic isolation device. A building construction method characterized by being constructed through a building process.