JP3131829B2 - Seismic isolation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a seismic isolation device using rolling elements for seismic motion mainly used for heavy objects such as buildings, machines and devices.

[0002]

2. Description of the Related Art As a prior art, a rolling member having a rod-shaped circular cross section, that is, a roller having a round cross section, is sandwiched between a curved surface on a support and a curved surface below a supported member by the present inventor. There is a seismic isolation device having a central portion and a link mechanism rotatably connected to a supporting member and a supported member (Japanese Patent Laid-Open No. 10-87).
No. 63, hereinafter abbreviated as a roller type). Also, a seismic isolation device developed by the inventor, in which a guide member having a curved surface is mounted on a support and the supported member is supported by a rolling element that can roll around an axis, that is, an axle and wheels that can roll around the axle. There is a device (described in Japanese Patent Publication No. 6-74609,
Hereinafter, it is abbreviated as wheel type). When these seismic isolation devices are actually used, one or a plurality of seismic isolation devices are arranged between the support and the supported object in accordance with the weight and shape of the supported object.

[0003]

In the above seismic isolation device of the prior art, the restoring force in the displaced state is proportional to the weight of the supported member,
The natural frequency is independent of the weight, and can be effectively isolated from long-period ground motions.
Among these, the roller type is mounted between the support and the supported body, and the rollers are interposed between the upper rail and the lower rail to form a unit unit. The combination of the devices is one unit. At the time of the maximum displacement due to the occurrence of one-way seismic motion, when looking at each roller in the lower unit unit, the highest part which is the concave center of the upper rail and the lowest which is the center of the concave surface of the lower rail fixed to the support The one-sided stroke S indicating the maximum displacement in the horizontal direction with respect to the portion is substantially equal to the overall length L of the lower rail in the concave longitudinal direction. For example, as a seismic isolation device for earthquake motion of the Hanshin-Awaji Great Earthquake class, the total stroke 2S may be selected to be approximately 500 mm, the total length L of the seismic isolation device may be selected to be approximately 250 mm, and the length of the lower rail may be short. It can be stored compactly. However, since the roller alone does not generate damping force, it is necessary to separately provide an additional device for damping force, and the roller may fall off or fall into a deadlock state on a concave surface sandwiching the roller vertically. Japanese Patent Application Laid-Open No. 10-8763 discloses that a special link mechanism is provided to restrict the movement of the rollers. Further, there is a type in which a special damper or a damping device such as a spring or a special frame is added. On the other hand, the conventional wheel type has a simple structure without the need for a special damping device because the friction between the wheel and the axle effectively acts as a damping force. Needs to be twice as large as
As a seismic isolation device for earthquake motion of the Hanshin-Awaji Great Earthquake class, it is necessary to select the required total stroke 2S to be approximately 500 mm and the total length L of the seismic isolation device to be approximately 500 mm, which has the problem of increasing the size of the device. ing. On the other hand, the present invention improves the wheel type, makes effective use of the damping force by the wheel and the axle, does not require a special damping device, and can reduce the size of the device to approximately the same as the roller type, It is an object of the present invention to obtain a simple seismic isolation device that is mainly suitable for heavy load applications and that can flexibly cope with changes in load resistance.

[0004]

According to the present invention, in order to achieve the above object, according to the first aspect of the present invention, a plurality of support members are mounted between a support member and a supported member. A concave lower rail fixed in parallel with a row interval and a central portion forming the lowest part, a plurality of lower wheels engaged with the lower rail, and a plurality of lower wheels fixed to the supported body with a plurality of row intervals. An upper rail disposed in parallel with the lower part of the lower rail in a concave shape that forms the highest part, and a plurality of upper wheels that engage with the upper rail; A pair of parallel axles that rotatably support the upper wheels by being inserted in series and a support member that fixes the axles to each other are provided, and the respective wheels are independently rotated around the respective axles by seismic motion. While rolling along each of the rails to release the supported body. It was solved by enabling the the isolator. According to the second aspect of the present invention, the lower rail is fixed to the support and extends in a longitudinal direction. The lower rail has a substantially constant width whose center is the lowest portion and gradually increases toward both ends. The upper rail is fixed below the supported member and has a longitudinally extending upper base and the upper base has the highest central part at both ends. A lower wheel and an upper wheel, each of which has an upper rolling surface having a substantially constant width concave opening that is gradually lowered toward the lower surface, and the lower rolling surface and the upper rolling surface can be rolled respectively. 2. The apparatus according to claim 1, wherein each of the wheels is independently rotated around each axle by the seismic motion and rolls along each rolling surface under the restraint of the opening to seismically isolate the supported body. The described seismic isolation device can be used. According to the third aspect of the present invention, the seismic isolation device according to the first or second aspect can use the pair of plate-like members at each axle end as a support member. According to the fourth aspect of the present invention, in the seismic isolation device according to any one of the first to third aspects, a distance between adjacent wheels fitted or fixed between adjacent wheels across each axle is smaller. A seismic isolation device provided with a connecting rod having a thickness can be provided. In the invention according to claim 5, in the seismic isolation device according to any one of claims 1 to 4, it is preferable that the seismic isolation device include a bearing interposed between each wheel and each axle. In the invention according to claim 6, in the seismic isolation device according to any one of claims 1 to 5, it is preferable that each wheel and / or each rail be substantially the same module. . According to a seventh aspect of the present invention, at least one pair of the seismic isolation devices according to any one of the first to sixth aspects is mounted on a support such that the wheel rolling directions of the lower rail and the upper rail are perpendicular to each other. A seismic isolation device that is stacked and fixed, and each wheel rotates along each rail while rotating around each axle by seismic motion including orthogonal two-way components, enabling the supported body to be isolated. Can be.

The common components among the components used in the seismic isolation device of the present invention will be described. As a support,
Any device can be used as long as the seismic isolation device can be fixed.
There are foundations or fixings / fixed objects or structures on them. The supported object is mainly a building such as a building, an apartment house or a detached house, or a heavy object such as a large-sized machine or device. However, a medium-sized or light-weighted object can be used. Rail materials include metal, hardwood, hard plastic, F
Although RP, glass, ceramic, and the like can be used, carbon steel or stainless steel is most commonly used, and the material and size are selected according to the weight of the supported member and the use conditions. The concave shape of the rail is not particularly limited, but in order to obtain a desired spring constant, the vertical cut surface forms the lowest or highest part in the reference state at the time of non-operation of the earthquake, and has a symmetrical shape such as an arc, a parabola, a hyperbola, a straight line, etc. A constant curvature or a curvature that is changed depending on the position is used singly or in combination, and the characteristic of the restoring force is, for example, the one described in Japanese Patent Publication No. 6-74609. Further, a receiving portion for mounting the wheel may be provided at the concave end of the lower rail, and the wheel may move to the central portion when an earthquake motion occurs. Further, it is preferable to provide stoppers made of rubber, spring material, steep slopes of the rails, bending of the rails, and the like at both ends of the rails. The configuration of the wheel and the axle is not particularly limited as long as it is a rolling element that can roll around the axis. As the material of the wheel, axle, support material and connecting rod, metal, ceramic or hard plastic can be used, but the most widely used material is carbon steel or stainless steel, and the material and the material may vary depending on the weight and use conditions of the supported body. The size is selected. The wheels are preferably provided with separate rolling bearings or oilless bearings, and off-the-shelf bearings can also be used. When a hard plastic or the like is used for a wheel or an axle, a separate bearing can be omitted.

[0006]

Embodiments of the present invention will be described with reference to the drawings. Some are omitted to avoid congestion in the figure. FIG. 1 is an example of the seismic isolation device of the present invention, in which (a) is a front view, (b) is a plan view of a lower half as it is, and an upper half is a plan view excluding a supported body and an upper rail. FIG. 2 is a schematic front view showing the operation of the seismic isolation device of FIG. 3A and 3B show a seismic isolation device in which the seismic isolation device of FIG. 1 is combined in two vertical stages, and are (a) a plan view and (b) a front view. (A) looked down at the upper seismic isolation device from the supported body side. 4A and 4B show another example of the seismic isolation device of the present invention. FIG. 4A is a front view, FIG. 4B is a plan view, and FIG. FIG. 5 shows a seismic isolation device obtained by combining the seismic isolation device of FIG.
(B) It is a front view. (A) looked down at the upper seismic isolation device from the supported body side. 6A is a front view illustrating an example of a supported body to which the seismic isolation device of FIG. 3 is attached, and FIG. 6B is a plan view viewed in the direction BB. Hereinafter, the seismic isolation device will be described as left and right, up and down, and front and rear when viewed from the front.

Referring to FIG. 1, an example of the seismic isolation device 1 of the present invention is shown.
Will be described. The description of the same components is partially omitted. The seismic isolation device 1 is mounted between the support body 2 and the supported body 3, and includes, as essential components, a lower rail 4, an upper rail 5, wheels 7, an axle 8, and a support member 6. A connecting rod 10 is provided as a component.
In the lower rail 4, a plurality of n rows (n is an integer of 2 or more, the same applies to 4 rows or less in this example) having a width Q are fixed on the support 2 in parallel at intervals, and the central part is the lowest part. It is formed, for example, on a circular arc surface as a concave shape gradually increasing toward both ends. The upper rail 5 has a width Q below the supported body 3.
A plurality of n rows are fixedly arranged in parallel with the lower rail 4 at intervals, and are formed, for example, in a circular arc surface as a concave shape in which the central portion is the highest portion and gradually decreases toward both ends. The lower rails 4 and the upper rails 5 have a constant distance P between adjacent rails at positions where they do not overlap in plan view, and the lower rails 4 and the upper rails 5 have concave shapes such as arc surfaces facing each other. It is arranged in the direction of. Here, the upper rail 5 and the lower rail 4 are substantially the same module, and can be used with their vertical directions interchanged. Each of the wheels 7 is a substantially identical module, and has a pair of axles 8, 8 which will be described later in detail in a pair of axles 8, 8 at the symmetrical positions of the lower rails 4 and the upper rails 5 in the right and left directions of the rolling of the wheels X in front view. Xn (16 in this example) are arranged, of which 2xn (8 in this example) a pair of left and right lower wheels 7a engaging with the lower rail 4;
The pair of left and right upper wheels 7b engaging with the upper rail 5 is 2 ×
n (eight in this example). A pair of axles 8 are disposed in parallel at longitudinally symmetric positions in the front-rear direction Y perpendicular to the left-right direction X, and rotatably support the lower wheels 7a and the upper wheels 7b, respectively. Where axle 8,
Reference numeral 8 denotes a fixing tool 9 which is formed, for example, by notching a shaft 8 and fixing the contact plate with a screw for stopping the rotation, and is fitted and fixed to holes 6a, 6a formed in a support member 6 described later. The fixing tool 9 may be provided with screws at the front and rear ends of the axles 8, 8 instead of the abutment plate and the detent, and fixed by nut tightening or welding.

The upper rail 5 and the lower rail 4 are arranged in this order from the near side: an upper rail 5 → a lower rail 4 → an upper rail 5 → a lower rail 4 → a lower rail 4 → an upper rail 5 → a lower rail 4 → an upper rail 5. Correspondingly, the center of each wheel 7 is inserted through a pair of axles 8, 8, and the upper wheel 7b → the lower wheel 7a → the upper wheel 7b → the lower wheel 7a
The lower wheels 7a, the upper wheels 7b, the lower wheels 7a, and the upper wheels 7b are arranged in series in this order. The order of these rails and wheels is not necessarily limited to this, and the upper wheels 7b
In addition, it is only necessary that the lower wheels 7a are arranged in a balanced manner. The number n may be appropriately selected according to the load resistance required from the supported body 3 side. It is preferable to provide a separate bearing such as a non-lubricated bearing or a rolling bearing between each wheel and the axle because stable friction can be obtained. However, when a hard plastic is used for the wheel or the axle, no intervention is required. . Each lower wheel 7a and upper wheel 7b
It is preferable to form flanges 7c and 7d on both sides or one side, respectively, so that they can be engaged with the lower rail 4 and the upper rail 5, respectively, to prevent derailing. The support member 6 is a pair of front and rear, substantially right and left long, substantially rectangular plate-like members. The front and rear end portions of the axles 8, 8 are fitted into holes 6a, 6a formed in symmetrical positions and fixed by fixing members 9. Has been stopped. The support member 6 is not limited to a rectangular plate-like material, and may be any shape as long as the axles 8 can be fixed to each other at symmetrical positions without hindering the rolling of the wheels 7. The connecting rod 10 is a rectangular plate-like member extending in the left and right direction, is fitted or fixed over the axles 8 and 8 in the gap between the wheels 7 at the adjacent positions, and has a thickness smaller than the distance between the wheels 7 at the adjacent positions. Although (2 × n-1) (7 in this example) are provided, the axles may be omitted when the axles 8 and 8 are short and the number of n is small. Connecting rod 10
Is not limited to a rectangular plate-like material, and may be any shape that does not hinder the rolling of each wheel 7. Between each wheel 7 and the support 6,
When the connecting rod 10 is provided, each wheel 7 is disposed between the connecting rod 10 and the connecting rod 10.
Washers 7e so that the sides of the
Are mounted through each axle 8. Also washer 7e
Alternatively, a projection may be provided on the support member 6 or the connecting rod 10 or a flanged bearing may be interposed on each wheel 7. The support 2 and the supported body 3 are replaced with the floor F and the heavy object G shown in FIGS. 2 and 3B, and the lower rail 4 and the upper rail 5 are directly fixed to the floor F and the heavy object G, respectively. It may be that. With the above configuration, each of the lower wheels 7a of the wheels 7 rotates along the lower rails 4 while rotating around the shafts 8, 8 fixed to the supporting members 6, 6, and each upper wheel 7b rotates around the axles 8, 8. While rotating, it can roll independently along each upper rail 5. The wheels 7, the upper rails 5 and the lower rails 4 do not necessarily have to be all the same module. However, it is preferable to use substantially the same module because it can flexibly cope with a desired load resistance and can reduce the cost. .

The above-described seismic isolation device 1 is a case where the unit unit is used alone, but FIG. 3 shows that the pair of seismic isolation devices 1 are connected to the lower rail 4 and the upper rail 5 so that the rolling directions of the wheels are mutually different. Right and left direction X and front and rear direction Y so as to be at right angles
, The lower support 2 is fixed on the floor F, and the upper support 3 is fixed below the heavy load G, and the seismic isolation device of the combined unit is provided. 11 is assumed. Here, portions corresponding to the lower supporting member 3 and the upper supporting member 2 are fixed and integrated with each other. FIG. 6 shows an example in which 13 units of the seismic isolation device 11 are disposed as a heavy object G between a detached house and a foundation structure F, for example.

Referring to FIG. 4, a seismic isolation device 1 according to another example of the present invention is shown.
2 will be described. The description of the same components is partially omitted. The seismic isolation device 12 is mounted between the support body 2 and the supported body 3 and includes a lower rail 14, an upper rail 15, wheels 17, an axle 18 and support members 16 as essential components. A connecting rod 13 is provided as a component. The lower rail 14 is a rectangular body extending in the longitudinal direction X of the rolling direction of the wheels and having a width T in the front-rear direction Y.
and a lower portion having a lower base portion 14a in which a central portion in the left-right direction X is the lowest portion and a concave shape having a substantially constant width gradually increasing toward both ends, for example, an arc-shaped opening is formed. And a plurality of n rows (in this example, 4
Are fixedly mounted on the support 2 in parallel at a distance.
The upper rail 15 has an upper base 15a having a rectangular shape extending in the left-right direction X and having a width T in the front-rear direction Y, and an upper base 15a.
An upper rolling surface 15b having, for example, an arcuate opening as a concave shape having a substantially constant width whose central portion is the highest portion and gradually decreases toward both ends. N rows (four rows in this example) are fixed below the supported member 3 in parallel at positions not overlapping with the lower rails 14 in plan view. Here, the lower rails 14 and the upper rails 15 have a constant U between adjacent rails at positions where they do not overlap in plan view, and the lower rolling surface 14b and the upper rolling surface 15b have the same central portion. At the level, the left and right ends are arranged in a vertically symmetrical position so as to face each other. Here, the upper rail 15 and the lower rail 14
And a substantially same module, and the vertical rolling surfaces can be interchanged. The wheels 17 are each substantially the same module, the lower rail 14 and the upper rail 1
4 × n (16 in this example) are disposed at left-right symmetric positions in the wheel rolling left-right direction X in front view with respect to 5, and a pair of left and right lower wheels 17a engaged with the lower rail 14 is 2 × n.
(In this example, eight) and a pair of left and right upper wheels 17b engaging with the upper rail 15 has 2 × n (eight in this example).

A pair of axles 18 are disposed in parallel at longitudinally symmetric positions in the longitudinal direction Y perpendicular to the lateral direction X, and rotatably support the lower wheels 17a and the upper wheels 17b respectively. I have. Here, the axles 18, 18 are fixed
For example, a hole 16a formed in the support member 16 described later by notching the shaft 18, fixing the contact plate with a screw for stopping rotation, and
16a is fitted and fixed. As described above for the seismic isolation device 1, the fixing member 19 may be fixed by screwing and nut tightening or welding, or a separate bearing such as an oilless bearing or a rolling bearing is interposed between each wheel and the axle. Is preferred. Here, each upper rail 15 and lower rail 14
The lower rail 14 → the upper rail 15 → the lower rail 14 → the upper rail 15 → the lower rail 14 → the upper rail 15 → the lower rail 14 → the upper rail 15 are arranged in this order from the near side. Is the lower wheel 17a →
The upper wheels 17b, the lower wheels 17a, the upper wheels 17b, the lower wheels 17a, the upper wheels 17b, the lower wheels 17a, and the upper wheels 17b are arranged in this order. However, the order is not limited to this, and the upper wheels 17b and Lower wheel 17
It suffices if a is arranged in a balanced manner.
The number n may be appropriately selected according to the load resistance required from the supported body 3 side. The support member 16 is a pair of front and rear substantially right and left long substantially rectangular plate-like members, and the holes 1 formed at symmetric positions are formed.
The front and rear end portions of the axles 18 and 18 are fitted to 6a and 16a, fixed by fixing members 19, and stopped. The support member 16 is not limited to a substantially rectangular plate-like member, and may be any shape as long as the axles 18 can be fixed to each other at symmetrical positions without hindering the rolling of the wheels 17. The connecting rod 13 has a configuration similar to that of the connecting rod 10 and will not be described in detail. Each wheel 1
7, a washer 17e is mounted between the support member 16 and the connecting rod 13, but has the same configuration as that of the washer 7e of the seismic isolation device 1, and a detailed description thereof will be omitted. Also, a modified example of the washer 17e is the same as the washer 7e, and a detailed description thereof will be omitted. The support 2 and the supported body 3 may be replaced with the floor F and the heavy object G shown in FIG. 5B, and the lower rail 14 and the upper rail 15 may be directly fixed to the floor F and the heavy object G, respectively. Good. With the above-described configuration, each of the lower wheels 17a of the wheels 17 moves along the lower rolling surface 14b of each of the lower rails 14 while rotating around the axles 18 and 18 fixed to the supporting members 16 and 16, and each of the upper wheels 17b While rotating around the axles 18, 18, the upper rolling surface 15 b of each upper rail 15 can be independently rolled along the upper rolling surface 15 b in a substantially fixed width opening of each of the rolling surfaces 14 b and 15 b in a vertically restrained state. Have been. Each of the wheels 17, the upper rails 15 and the lower rails 14 does not necessarily have to be all the same module. However, it is preferable to use substantially the same module because it can flexibly cope with a desired load resistance and can reduce the cost. .

Although the above-described seismic isolation device 12 is a unit unit alone, FIG. 5 shows that a pair of the seismic isolation devices 12 are arranged so that the wheel rolling directions of the lower rail 14 and the upper rail 15 are perpendicular to each other. The lower support 2 is placed on the floor F, and the upper supported 3 is placed below the heavy load G. The seismic isolation devices 20 of the combination units are respectively fixed. Here, portions corresponding to the lower supporting member 3 and the upper supporting member 2 are fixed and integrated with each other.
Further, a seismic isolation device 20 can be provided in place of the seismic isolation device 11 of FIG.

Next, the operation of the seismic isolation device 1 will be described with reference to FIGS. In the reference state when the earthquake is not operating, as shown in FIG. 1, each lower wheel 7a of the seismic isolation device 1 is located at the center of the lower rail 4 on the left and right of the concave lowest part.
b is located at the center of the upper rail 5 on the left and right of the concave highest part position, and the supported body 3 is stationary above the support body 2 in a stable state at the lowest level position. When a seismic motion in the left-right direction X occurs, the lower wheels 7a, 7a roll on the concave surface of the lower rail 4 as shown in FIG. It rolls and causes relative displacement. As a result, the supported member 3 receives a restoring force corresponding to the displacement from the lowest level position and repeats vibration, but the load of the supported member 3 reaches the support member 2 directly. Without being supported, 3 → upper rail 5 → upper wheel 7b → axle 8
→ Following the route of the lower wheel 7a → the lower rail 4 → the support 2 and always passes between each wheel and the axle, the friction between the wheel and the axle works effectively as a damping force and the seismic isolation function works. Here, the one stroke S of the maximum horizontal movement distance from the lowest portion which is the center of the concave surface is the total length L of the concave rail rolling longitudinal direction of the lower rail 4 and the distance M between the axles 8 and 8 between the axles. Are approximately in the relationship of S = LM, L = S + M. Here, since M is a sufficiently small value with respect to L,
The value is much smaller than that of the conventional wheel type rail and very close to that of the roller type, so that the device can be miniaturized, and a special damping device is not required and the structure is simple. For example, in the case of the Hanshin-Awaji Great Earthquake, the total stroke 2S is about 500m.
m and the total length L may be about 250 mm + M. Although the seismic isolation device 1 shown in FIG. 1 can be used alone to obtain a seismic isolation action in one direction in the left-right direction X, as shown in FIG. The seismic isolation device 11 of the combination unit can be obtained by stacking two stages to obtain seismic isolation action in two directions perpendicular to the left-right direction X or the front-rear direction Y. When the ground motion including two orthogonal components in the right and left direction X and the front and rear direction Y is generated in a combined manner, the supported body 3 swings to the combined position corresponding to the ground motion in each direction. Seismic isolation works. When (2 × n−1) connecting rods 10 are mounted, the axles 8 act to reinforce the axles 8 to eliminate excessive stress.

Next, the operation of the seismic isolation device 11 will be described with reference to FIGS. As shown in FIG. 4, in the base state when the earthquake is not activated, each of the lower wheels 17 a is located at the center of the lower rolling surface 14 b of the lower rail 14 on the left and right of the concave lowest part position. Reference numeral 17b denotes a central portion of the upper rolling surface 15b of the upper rail 15, located on the left and right of the concave highest part position, and the supported member 3 is stationary above the supporting member 2 in a stable state at the lowest level position. When an earthquake motion in the left-right direction X occurs, although not shown, each lower wheel 17a rolls on the concave surface of the lower rolling surface 14b of the lower rail 4, and at the same time, each upper wheel 17b rolls on the upper rolling surface 15b of the upper rail 5. It rolls on the concave surface to cause relative displacement. As a result, the supported member 3 receives a restoring force corresponding to the displacement from the lowest level position and repeats vibration, but the load of the supported member 3 is directly Without reaching 2, the supported member 3 → the upper rail 15 → the upper wheel 17b → the axle 18 → the lower wheel 17a → the lower rail 14 →
Since the vehicle always follows the path of the support 2 and passes between each wheel and the axle, the friction between the wheel and the axle effectively acts as a damping force, and a seismic isolation function works. In the seismic isolation device 11, each lower wheel 17a extends along each lower rolling surface 14b,
b is rolled independently along each upper rolling surface 15b under the vertically constrained state in an opening having a substantially constant width, so that the device can be downsized as in the case of the seismic isolation device 1. In addition to the above, it has the effect of preventing separation from vertical acceleration and preventing jumping up, and is suitable for cases where vertical movement is severe or for a seismic isolation of a supported body that is taller in the vertical direction. Although the seismic isolation device 11 shown in FIG. 4 can be used alone to obtain a seismic isolation function in one direction in the left-right direction X, as shown in FIG. The seismic isolation device 20 of the combined unit can be obtained by stacking two stages to obtain seismic isolation in the right and left directions X or the front and rear directions Y. When the ground motion including two orthogonal components in the right and left direction X and the front and rear direction Y is generated in a combined manner, the supported body 3 swings to the combined position corresponding to the ground motion in each direction. Seismic isolation works. When the (2 × n−1) connecting rods 13 are mounted, they act to reinforce the axles 18 and 18 to eliminate excessive stress.

As an example of use of the seismic isolation devices 11 and 20,
For example, as shown in FIG. 6, by arranging a plurality of units between a detached house G and a foundation structure F, it is possible to cope with various specifications. By increasing / decreasing the number of combined units stacked in two stages or increasing / decreasing the number of wheels, that is, the number of n according to the load of the supported member 3, it is mainly applicable to a wide range as a heavy load seismic isolation device. It is also possible to mass-produce and prepare wheels and / or rails of substantially the same module in advance, adjust the number of n according to the specification of the supported member 3, and flexibly cope with a desired load resistance. So you can
Cost can be reduced.

[0016]

According to the seismic isolation device of the present invention, the structure is simple because the damping force of the wheel type is effectively used and no special damping device is required, and the size of the device is significantly smaller than that of the conventional wheel type. The size can be reduced by approximating the roller type, and the size can be reduced. Since a plurality of wheels and rails are provided, the present invention is mainly applicable to a heavy-load supported member. In addition, by preparing wheels and / or rails of substantially the same module in advance and appropriately selecting the number thereof, it is possible to flexibly cope with a desired load-bearing load and reduce the cost. In addition, the configuration with the opening as the rolling surface prevents separation of vertical acceleration and prevents jumping up, which is effective in cases of severe vertical movement and seismic isolation of a supported object that is taller in the vertical direction. is there.

[Brief description of the drawings]

FIG. 1 shows an example of a seismic isolation device of the present invention, in which (a) is a front view,
(B) The lower half is as it is, and the upper half is a plan view excluding the supported member and the upper rail.

FIG. 2 is a schematic front view showing the operation of the seismic isolation device of FIG.

FIG. 3 is a seismic isolation device obtained by combining the seismic isolation device of FIG.

FIG. 4 shows another example of the seismic isolation device of the present invention, in which (a) is a front view,
(B) The lower half is as it is, and the upper half is an A-A cross section, which is a plan view.

5A and 5B show a seismic isolation device in which the seismic isolation device of FIG. 4 is combined in upper and lower two stages, wherein FIG. 5A is a plan view and FIG.

6A is a front view showing an example of a supported body equipped with the seismic isolation device of FIG. 3, and FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 11, 12, 20 Seismic isolation device 2 Support 3 Supported object 4, 14 Lower rail 5, 15 Upper rail 6, 16 Support material 6a, 16a Hole 7, 17 Wheel 7a, 17a Lower wheel 7b, 17b Upper wheel 7c, 7d Flange 7e, 17e Washer 8, 18 Axle 9, 19 Fastener 10, 13, Connecting rod 14a Lower base 14b Lower rolling surface 15a Upper base 15b Upper rolling surface F Floor surface G Heavy material P, U interval Q, T width S single stroke L total rail length M distance between axes n number X left-right direction Y front-rear direction

──────────────────────────────────────────────────続 き Continuation of front page (58) Field surveyed (Int. Cl. ⁷ , DB name) F16F 15/02 E04H 9/02 A47B 91/00-97/00 F16C 29/04

Claims (7)

(57) [Claims] 1. A concave lower rail which is mounted between a supporting body and a supported body, is fixed to the supporting body in parallel with a plurality of rows therebetween, and has a central portion forming a minimum portion; and the lower rail. A plurality of lower wheels that are fixed to the supported body at intervals of a plurality of rows, and are arranged in parallel in a concave shape where the central portion forms the highest part and do not overlap above the lower rail in plan view. An upper rail provided, a plurality of upper wheels engaged with the upper rail, a pair of parallel axles rotatably supported by inserting the lower wheel and the upper wheel in series, and connecting the respective axles to each other. A support member to be fixed, wherein each of the wheels rolls along each of the rails while being independently rotated around each axle by seismic motion, so that the supported member can be isolated. Quake device. 2. The lower rail has a lower base fixedly mounted on a support and extending in a longitudinal direction, and a concave opening having a substantially constant width which is gradually increased toward both ends at a center portion of the lower base. An upper rail fixed below the supported body and extending longitudinally, and a central portion of the upper rail is the highest portion and gradually lowers toward both ends. And a lower wheel and an upper wheel capable of rolling the lower rolling surface and the upper rolling surface, respectively. 2. The apparatus according to claim 1, wherein each wheel independently rotates around each axle and rolls along each rolling surface under the restraint of the opening to seismically isolate the supported body. The seismic isolation device described. 3. The seismic isolation device according to claim 1, wherein a pair of plate-like members are used as support members at each axle end. 4. The seismic isolation device according to claim 1, wherein the connection between adjacent wheels is smaller than the distance between adjacent wheels fitted or fixed across each axle. A seismic isolation device characterized by a rod. 5. The seismic isolation device according to claim 1, wherein a bearing is interposed between each wheel and each axle. 6. The seismic isolation device according to claim 1, wherein each wheel and / or each rail is substantially the same module. 7. At least one pair of the seismic isolation devices according to any one of claims 1 to 6 is fixedly mounted on a support in two steps so that the rolling directions of the wheels of the lower rail and the upper rail are perpendicular to each other. A seismic isolation device wherein each wheel is rolled along each rail while being rotated around each axle by seismic motion including orthogonal two-way components, so that the supported member can be isolated.