JPH1182618A - Base isolation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide effective base-isolation function by only a single device and provide sufficient strength by a simple structure, by enabling a supported member to be base isolated by a supporting member being allowed to oscillate by rolling members rolled in respective guide grooves in one direction and/or in the other direction by an earthquake movement. SOLUTION: This device is mounted to be interposed between a supported body 2 and a supporting body 3, and equipped with a rack 4, a supporting member 5, a lateral guide part 6, and rolling members 7, 8. The rolling members 7, 8, in particular, are fitted into the lowest portions of guide grooves 4d in their neutral positions, and respective pairs of wheels on the outside roll in the guide grooves 4d of fore-and-aft guide parts 4b in the fore-and-aft direction Y and allow the supporting member 5 to oscillate, and thus base isolation is enabled. Wheels 7a of the rolling members 7 and wheels of the rolling members 8 are fitted into guide grooves 6b of the lateral guide parts 6 and into guide grooves 4d of the fore-and-aft guide parts 4b, in a rollable manner in the lateral direction X and in the fore-and-aft direction Y, respectively, and the lateral guide parts 6 are placed orthogonally between the pair of fore-and-aft guide parts 4b, 4b. The supporting member 5 is thereby enabled to oscillate in the fore-and-aft direction Y and in the lateral direction X.

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 for seismic motion used in buildings, machines, equipment and the like.

[0002]

2. Description of the Related Art As a prior art, there is a seismic isolation device in which various kinds of laminated rubber are interposed between a seismic isolated body such as an object or a building, and a support such as a foundation ("Invention" published by Invention Association 1995).
June, p. 24-28). There is also a seismic isolation device developed by the present inventor, which has a structure 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 (Japanese Patent Publication No. 6-74609). No.).

[0003]

The seismic isolation device using the laminated rubber according to the prior art described above has different seismic isolation performance depending on the weight of the seismic isolated body. There was a lack of stability in the body. In a seismic isolation device with a structure supported by rolling elements, the restoring force in the displaced state is proportional to the weight of the supported body, the natural frequency is independent of the weight, and it works effectively even for long-period ground motions Although it is a handy seismic isolation device, depending on the supported object, it is necessary to arrange a plurality of them, and in this case, it was necessary to take up a lot of space. On the other hand, according to the present invention, in addition to the characteristics of the seismic isolation effect of the rolling element support structure, an effective seismic isolation effect can be obtained only by installing a single unit, no space is required, and when the vertical movement is severe or in the vertical direction. OA equipment and medical equipment for general households and small businesses that can cope firmly with a tall supported body, have sufficient strength with a simple structure, are low cost, and are lightweight and small. It is an object of the present invention to obtain a seismic isolation device suitable for a wide range of uses, from low loads for objects such as art objects and suspended articles to medium loads such as buildings under space-saving conditions.

[0004]

According to the present invention, in order to achieve the above object, according to the first aspect of the present invention, there is provided a pair of one-way guide portions which are erected in parallel on a support, The other direction guide portion disposed in a direction perpendicular to the one direction guide portion, and in one direction at a position opposite to the side of the main body member of the one direction guide portion and in the other direction on the longitudinal side surface of the main body member of the other direction guide portion. Each of the engraved central portions has a lower concave one-way and other-direction guide groove forming a lowermost portion, and a movable member that supports the supported body and is disposed at least on the support body side in parallel in the other direction. A pair of support members, a pair of wheels each having a wheel rotatably fitted in each of the guide grooves, an end of the other-direction guide portion, and an axle fixed to a side facing the other-direction guide portion of the movable member; Rolling members, wherein each of the rolling members is moved in each of the guide grooves in one direction by seismic motion. Or other direction by rolling swung to the support member wherein the object support was resolved by seismic isolation can and the seismic isolation device. According to the invention of claim 2, the one-way and other-direction guide grooves are engraved in upper and lower two stages by shifting the lowermost portion,
The rolling member is fitted at an oblique position to the lower end portion of the guide groove at a neutral position and an axle fixed at an oblique position to an end of the other direction guide portion and a side facing the other direction guide portion of the movable member. The seismic isolation device according to claim 1, further comprising a wheel attached to the supporting member, and swinging the seismic motion of the supporting member while keeping the end surface of the supporting member substantially horizontal. According to the third aspect of the present invention, the one-way and / or other-direction guide groove is engraved with a bottom on the body member of the one-way and / or the other direction guide portion. It can be a seismic device. According to the invention of claim 4, the one-way and / or other-direction guide groove is formed by penetrating the body member of the one-way and / or other direction guide portion. It can be a seismic device. According to the fifth aspect of the present invention, the one-way guide portion is erected in parallel with the opposed edge portions of the substantially rectangular bottom plate to form a frame, and the bottom plate is placed or fixed on the support. 4 can be obtained. In the invention according to claim 6, the support member is provided with a support table for supporting the supported member, and the movable member is disposed on the support member side of the support table in parallel in the other direction. The seismic isolation device described in. Claim 7
In the invention, it is preferable that the seismic isolation device according to any one of claims 1 to 6 has a bearing interposed between the axle and the wheel. According to an eighth aspect of the present invention, a plurality of the seismic isolation devices according to any one of the first to seventh aspects are overlapped, and the supporting member is swung in series to make the supported member seismically isolated. It can be a device.

The common components among the components used in the seismic isolation device of the present invention will be described. Any support can be used as long as the seismic isolation device can be fixed.
There are foundations or fixings / fixed objects or structures on them. As a material of the wheel of the rolling member, a metal such as steel or aluminum which is a rigid material, a ceramic or a hard plastic including porcelain or glass, etc. can be used. The material and size are selected according to the ability to withstand the weight and use conditions. The gantry, the support member, and the front-rear and left-right guide members (one-way or other-direction guide members) may be made of metal, ceramic, hard plastic, or the like by cutting, casting or molding, but the most commonly used is stainless steel. The material and size are selected according to the weight of the support and the use conditions. The lower concave shape of each guide member is not particularly limited, but in order to obtain a desired spring constant, for example, the vertical cut surface is formed into a shape having a constant or variable curvature by a single or combination of arcs, parabolas, hyperbolas, straight lines, etc. The restoring force characteristics are, for example,
What is described in 74609 is used.

[0006]

Embodiments of the present invention will be described with reference to the drawings. In the following description, the seismic isolation device of the present invention will be described as the gravity direction is down, the anti-gravity direction is up, left and right when viewed from the front of the support member according to the drawing, front and rear, inside and outside when viewed from the center of the support member. However, the left, right, front and rear may be interchanged, and may be one direction or another direction. FIG.
(A) at the neutral position of an example of the seismic isolation device of the present invention.
It is a top view, (b) front view, (c) side view, and (d) (c) S part enlarged view. 2A and 2B show a gantry of the seismic isolation device of FIG. 1, wherein FIG.
-It is a B sectional view. 3: shows the left-right guide member of the seismic isolation device of FIG. 1, (a) is a top view, (b) is a front view, (c) is a side view. 4A and 4B show an example of a support member and a rolling member around the seismic isolation device of FIG. 1, wherein FIG. 4A is a plan view, FIG. 4B is a front view, FIG. It is a D section partial cross-section enlarged view. 5A is a plan view and FIG. 5B is a front view of the seismic isolation device of FIG. FIG.
7A is a plan view, FIG. 7B is a front view, and FIG. 7A is a plan view, FIG. 7B is a front view, and FIG. 7C is a side view at a neutral position of another example of the seismic isolation device of the present invention. FIG.
(A) is a principal part explanatory view showing a displacement state from a neutral position of the seismic isolation device of FIG. 1, and (b) is a principal part explanatory view showing a displacement state of the seismic isolation device of FIG. 7 from a neutral position. is there. 9A and 9B show another example around the support member and the rolling member of the seismic isolation device of FIG. 1, wherein FIG. 9A is a front view, FIG. 9B is a cross-sectional view taken along line C ′ · C ′, and FIG.
FIG. 4 is an enlarged cross-sectional view of a part taken along line D ′ · D ′. FIG. 10 is a front view of an example in which the seismic isolation devices of FIG. 1 are overlapped and used. FIG.
FIG. 2 is a front view of an example in which the seismic isolation device of FIG. 1 is used in a falling state.

In FIG. 1, a seismic isolation device 1 according to an example of the present invention is shown.
Is mounted between the supported member 2 and the support member 3 and includes a gantry 4 including a front and rear guide portion 4b, a support member 5, and a left and right guide portion 6.
And rolling members 7 and 8. The gantry 4 also includes a bottom 4a having a substantially square plate shape, with reference to FIG.
And a pair of front and rear guide portions 4b and 4b erected in parallel to the opposite edge portions of the main body members 4c and 4c, each of which is a substantially rectangular parallelepiped main body member in the vertical direction. At the opposing position on the inner side surface, downwardly concave guide grooves 4d, 4d each having a bottom at the center in the front-rear direction Y in the front-rear direction are cut into a substantially constant width with a bottom, and the bottom 4a is placed or fixed on the support body 3. doing. Here, the front and rear guide portions 4b and 4b may be fixed directly on the support 3 without the bottom portion 4a. The support member 5 is provided with a substantially square support base 5a having a substantially horizontal surface and a space parallel to the support 3 under the support base 5a in the front-rear direction. Screw holes 5c and 5c are formed at symmetrical positions. Movable members 5b, 5b. Here, the support base 5a is abolished,
The movable members 5b, 5b may be directly fixed to the supported member 2. The screw hole 5c does not necessarily have to penetrate the movable member 5b. The left and right guide portions 6 have a substantially rectangular parallelepiped main body member 6a, and lower concave guide grooves 6b, 6b each having a bottom portion at the left and right central portions at opposite positions on front and rear longitudinal outer surfaces of the main body member 6a. It is engraved to a fixed width. Screw holes are formed at left and right ends of the main body member 6a at symmetrical positions in the front-rear direction. The left and right guides 6 are a pair of front and rear guides 4b, 4
It is placed in a substantially H shape at right angles between b. The bottom plate 4a and / or the support base 5a have been described as being substantially square. However, in the case where the allowable stroke of the seismic isolation device has a difference between front, rear, left, and right, it may be substantially rectangular instead of substantially square.

Referring to FIG. 4, the rolling member 7 includes a movable member 5.
The screw portion 7 at the outer end which can be screwed from the inside of the screw hole 5c of FIG.
c, an axle 7b having a bearing fitting portion 7d at an inner end and a narrow groove 7e at an inner terminal portion, a bearing 7f rotatably fitted to the bearing fitting portion 7d, and crimped to the bearing 7f. A wheel 7a that can roll in the guide groove 6b and a wheel 7a
And a snap ring 7g fitted to prevent the falling off of
In the neutral position, the wheel 7a is fitted to the lowermost portion in the guide groove 6b, and the wheel 7a rolls due to the seismic
b, the supporting member 5 swings via the movable member 5b and is seismically isolated. As the bearing 7f, a flat bearing or a rolling bearing using a synthetic resin such as a fluorine resin or a nylon resin may be used, but a fluorine resin is particularly preferable because it has a small friction coefficient and does not change with time. For the axle 7c, for example, steel, aluminum, a copper alloy, a titanium alloy, a plastic, or the like is used, but stainless steel, a titanium alloy, or the like is preferable from the viewpoint of corrosion resistance. The rolling member 8 has the same configuration as the rolling member 7 and a detailed description is omitted. Referring to FIG. 3, the threaded portions of the rolling member 8 are screwed into the screw holes at the left and right end portions of the left and right guide portion 6. At the neutral position, it is fitted to the lowermost portion in the guide groove 4d, and each pair of outer wheels rolls in the guide groove 4d of the front and rear guide portion 4b in the front-rear direction Y, and the support member 5 swings. It is said that it can be moved and seismically isolated. The wheels 7a of the rolling members 7 are rotatably fitted in the guide grooves 6b of the left and right guide portions 6 in the left-right direction X, and the wheels of the rolling members 8 are rotatably fitted in the guide grooves 4d of the front and rear guide portions 4b in the front and rear direction Y. The left and right guides 6 are placed at right angles between the pair of front and rear guides 4b, 4b, and are assembled in a substantially H shape, whereby the support member 5 can swing in the front and rear direction Y and the left and right direction X. . FIG.
As will be described later with respect to (a), the surface of the support member 5 of the seismic isolation device 1 has guide grooves 6b, 4d in which rolling members 7, 8 are fitted.
Because it tilts slightly according to the swing position due to the tilt of
It is better to avoid using the device in such a manner that the supported member 2 easily rolls or spills in a liquid state.

With reference to FIG. 9, a description will be given of a partially modified example of the support member and the rolling member of the seismic isolation device 1. The same components as those described with reference to FIG. Detailed description is omitted. The left and right guides 11 are opposed to the left and right longitudinally substantially rectangular box having an internal cavity formed by a pair of front and rear side body members 11a, upper and lower surface body members 11c, and left and right end body members 11d. At the position, guide grooves 11b, 11b, which are lower concave portions whose left and right central portions form the lowermost portion, penetrate to the inside of the box body and are engraved with a substantially constant width. A screw hole (not shown) is formed in the end face main body member 11d at a position symmetrical in the front-rear direction. And the left and right guide 11
Is a pair of front / rear guides 4b as in the seismic isolation device 1 described above,
It is placed in a substantially H-shape at right angles between 4b. The rolling member 7 is
The configuration is the same as that of the seismic isolation device 1 described above, and the wheels 7a are fitted in the guide grooves 11b, 11b of the left and right guide portion 11 so as to roll in the left and right direction X. Guide groove 4 of front and rear guide part 4b
d may have the same configuration as that of FIG. 1 described above, and although not shown, the guide groove 4d may be configured to penetrate the vertical main body member 4c, but in any case, the rolling member 8 moves inside the guide groove 4d. Each is fitted so that it can roll in the front-rear direction Y. In addition, the left and right guides are not formed as left and right substantially rectangular parallelepiped boxes having internal cavities, but are formed into substantially right and left long substantially rectangular parallelepipeds similar to the left and right guides 6, and are penetrated through guide grooves and engraved to a substantially constant width. It may be.

Referring to FIG. 7, another example of the seismic isolation device 1 of the present invention is shown.
0, the same components as those described with reference to FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted. Seismic isolation device 1
Numeral 0 is mounted between the supported member 2 and the support member 3, and is provided with a gantry 4, a support member 5, a left and right guide portion 6, a rolling member 7,
8 is provided. The gantry 4 has front and rear guide portions 4b, 4b erected in parallel with the opposite edge portions of the bottom portion 4a,
A plate-shaped vertical body member 4 is provided on the front-rear guide portions 4b and 4b.
c, 4c and upper and lower guide grooves 4 having a lower central portion in the front-rear direction Y in the front-rear direction at positions opposed to the left and right inner side surfaces.
e, 4e and lower guide grooves 4f, 4f are engraved with a substantially constant width. The lowermost portions of the upper guide grooves 4e, 4e are arranged to be shifted rearward from the lowermost portions of the lower guide grooves 4f, 4f. The movable members 5b and 5b of the support member 5 include:
A screw hole (not shown) into which the screw portion of the rolling member 7 is screwed is provided not at the symmetrical position but at an obliquely right and left position (upper left and lower right in FIG. 7). The left and right guide portions 6 are a left and right rectangular parallelepiped main body member 6a, a lower concave upper guide groove 6c, 6c having a lower center portion in the right and left direction above and below the front and rear outer surface opposing positions of the main body member 6a. Guide groove 6
d and 6d are engraved with a substantially constant width. The lowermost portions of the upper guide grooves 6c are shifted to the left with respect to the lowermost portions of the lower guide grooves 6d. A screw hole (not shown) into which the screw portion of the rolling member 8 is screwed at the left-right end face of the main body member 6a not at the front-rear symmetric position but at the oblique front-rear position (lower front side, upper rear side in FIG. 7). Are drilled.

The rolling member 7 has a threaded portion threaded from the inside of the screw hole of the movable member 5b, and wheels 7a capable of rolling in the guide grooves 6c and 6d at diagonally right and left positions are disposed. In, the wheels 7a are rolled by the seismic motion in the left-right direction X, and the support member 5 is rocked by seismic motion in the left and right directions in the guide grooves 6c and 6d. The rolling member 8 has a threaded portion of the rolling member 8 screwed into a screw hole at the left or right end of the left and right guide portion 6, and a wheel capable of rolling inside the guide grooves 4e and 4f to a position oblique to the front and rear is arranged. Guide grooves 4e, 4f in the neutral position.
The wheel is rolled by the seismic motion in the front-rear direction Y, and the support member 5 swings to be seismically isolated. The wheels 7a of the rolling members 7 are aligned with the guide grooves 6 of the left and right guides 6.
The wheels of the rolling member 8 are rotatably fitted in the guide grooves 4e and 4f of the front and rear guide portion 4b in the front and rear direction Y, respectively. 6, the support member 5 swings in the front-rear direction Y and the left-right direction X, and can be seismically isolated.
As described later with reference to FIG. 8B, the surface of the support member 5 of the seismic isolation device 10 has a pair of upper and lower guide grooves 6 c and 6 d in which the rolling member 7 is fitted, and the rolling member 8 fitted therein. By the pair of upper and lower guide grooves 4e and 4f, the center distance of each wheel of the pair of upper and lower rolling members 7, 7 is kept constant even when rolling from the neutral position, so that the wheels are horizontally inclined without being inclined. It is also possible to use such a device that the held member 2 is easily rolled or spilled in a liquid state.

Referring to FIG. 10, another example of the seismic isolation device 12 will be described. The same components as those described in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted. The seismic isolation device 12
This is a configuration in which the above-described seismic isolation device 1 is overlapped in two stages.
The base 4 of the first-stage seismic isolation device is fixed on the support 3, the support 5 a of the support member 5 is abolished, and the bottom 4 a of the second-stage base 4 is spaced parallel to the support 3 on the support 3 side. One-stage movable material 5
b and 5b are arranged and fixed. The seismic isolation device of the second stage has the same configuration as the seismic isolation device 1 described above. The wheels of the rolling members 7 of the first and second stages are guided by the guide grooves 6 b of the left and right guide portions 6.
In the left-right direction X, the wheel of the rolling member 8 is
The first stage and the second stage are swingable in series in the front-rear direction Y in the guide groove 4d, and the second stage support member 5 is capable of swinging the first stage and the second stage. It is superposed and swings in the front-rear direction Y and the left-right direction X to be seismically isolated. The support 4 of the second-stage seismic isolation device may be fixed on the support stand 5a of the first-stage seismic isolation device. Further, it is possible to successively further overlap the second stage on the second stage, whereby the size of the gantry 4 can be reduced on a plane.
It is usually preferable to use two steps because the thickness of the upper and lower parts increases when the steps are overlapped, and the time and labor for maintenance and inspection increase. Furthermore, the seismic isolation device 10 can be used to form a similar overlapping configuration.

Referring to FIG. 11, another example of the seismic isolation device 13 will be described. The same components as those described with reference to FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted. The seismic isolation device 13
The seismic isolation device 1 shown in FIG. 1 is turned upside down, with the support 3 up and the supported body 15 interposed therebetween.
The left and right guides 16 include a main body member 16a and a main body member 16a.
On the front and rear outer surfaces, guide grooves 16b, 16b are formed at substantially constant widths at opposing positions, the guide grooves 16b, 16b having a lower central portion forming the lowermost portion. Here, the guide groove 16b is configured such that the lowermost portions of the left and right central portions are downwardly concave without falling over the guide groove 6b of the seismic isolation device 1. The gantry 14 has a bottom portion 14a and a pair of front and rear guide portions 14b and 14b as in the case of the seismic isolation device 1, and the front and rear guide portions 14b and 14b are main body members 14c and 14b.
c and the lower left and right inner surfaces thereof are opposed to each other, and downwardly concave guide grooves 14d, 14d having a lowermost portion at the center in the front-rear direction are engraved with a substantially constant width, and the upper and lower centers of the guide grooves 14d are similar to the guide grooves 16b. The lowermost part of the part is designed to be concave downward without falling over. The left and right guides 16 are a pair of front and rear guides 14.
The support member 5 is swingable in the front-rear direction and the left-right direction by being assembled in a substantially H shape at right angles between b and 14b. Similarly, the seismic isolation devices 10 and 12 can be used by being turned upside down, but in each case, each of the guide grooves needs to have a downward concave shape in which the central portion forms the lowermost portion.

Next, referring to FIGS. 1, 5, 6, and 8 (a), the operation of the seismic isolation device 1 when a seismic motion occurs will be described. 5, 6, and 8 (a), the same components as those described with reference to FIG. 1 are denoted by the same reference numerals, and detailed description is omitted. When a seismic motion in the left-right direction X occurs in the seismic isolation device 1 at the neutral position shown in FIG. 1, it swings as shown in FIG.
That is, the wheel 7a of the rolling member 7, which was located at the neutral position at the lowermost portion in the left and right central portions in the downwardly concave guide groove 6b,
b, rolls in the right direction, for example, so that the support member 5 and the supported member 2 placed thereon rise gradually, and the wheel 7a reaches the right end of the guide groove 6b and reaches the upper limit. Position. The support member 5 and the supported body 2 receive a restoring force according to the displacement from the neutral position, and in addition to the above, a seismic isolation action is performed by a frictional force. At this time, the wheels 7a roll in the left-right direction X under the restraint of the guide grooves 6b, so that stability can be maintained even when the up-down movement is severe or in a supported body that is taller in the up-down direction.

When a seismic motion in the front-rear direction Y is further generated in the seismic isolation device 1 at the position shown in FIG. 5, the device swings as shown in FIG. That is, the wheel of the rolling member 8 located at the neutral position at the lowermost portion in the front-rear central portion in the lower concave guide groove 4d is guided by the inner surface of the guide groove 4d and rolls, for example, in the rearward direction. 5 and the supported body 2 placed thereon
Gradually rises, and the wheel of the rolling member 8 reaches the rear end of the guide groove 4d to reach the upper limit position. The support member 5 and the supported body 2 receive a restoring force according to the displacement from the neutral position, and in addition to the above, a seismic isolation action is performed by a frictional force. At this time, the wheels of the rolling member 8 roll in the front-rear direction under the restraint by the guide grooves 4d, so that stability can be maintained even in a case where the vertical movement is severe or in a supported body that is taller in the vertical direction. Since the actual seismic motion is generated by a combination of the vibration in the left-right direction X and the vibration in the front-rear direction Y, the support member 5 and the supported body 2 swing to the combined position corresponding to the seismic motion in the respective directions, and the seismic isolation is performed. The action works. Next, a displacement state from the neutral position of the seismic isolation device 1 will be described with reference to FIG. The solid line indicates the neutral position, and the chain line indicates the left swing position. In the seismic isolation device 1, the rolling member 7 is guided by the inner surface of the guide groove 6b, rolls leftward, and moves from the neutral position to the swing position. Here, in the neutral position, the surface of the support 5a is substantially horizontal, but in the swinging position, the surface of the support 5a is inclined by the inclination angle of the guide groove 6b, so that the seismic isolation device 1 is used. It is better to avoid using with objects such as that the supported body 2 easily rolls or spills in a liquid state.

The seismic isolation device 10 described with reference to FIG. 7 is also similar to the seismic isolation device 1 when the seismic motion in the left-right direction X and / or the front-rear direction Y occurs, the lowermost portion in the guide grooves 6c and 6d. The wheels 7a, 7a of the rolling member 7 at the neutral position are guided by the inner surfaces of the guide grooves 6c, 6d and roll in the left-right direction X, and were at the neutral position at the lowermost part in the guide grooves 4e, 4f. The wheels 8a, 8a of the rolling member 8 are guided by the inner surfaces of the guide grooves 4e, 4f and roll in the front-rear direction Y, and the support member 5 and the supported body 2 are combined corresponding to the seismic motion in each direction. It swings to the position and seismic isolation works. Referring to FIG.
The displacement state of the seismic isolation device 10 from the neutral position will be described. The solid line indicates the neutral position, and the chain line indicates the left swing position. In the seismic isolation device 10, the rolling members 7
Is guided by the inner surfaces of the guide grooves 6c and 6d, rolls leftward, and moves from the neutral position to the swing position. Here, at the neutral position, the surface of the support 5a is substantially horizontal, and even at the swinging position, the surface of the support 5a is not inclined and is substantially horizontal. This is, as described above, a pair of upper and lower guide grooves 6.
Since the center distance of each wheel of a pair of upper and lower rolling members 7, 7 disposed at oblique positions on the inner surfaces of c and 6d is kept constant, the surface of the support base 5a is not inclined, For this reason, the seismic isolation device 10 is suitable to be used for objects in which the supported body 2 is likely to roll or spill easily in a liquid state. The size of the base 4 of the seismic isolation devices 1 and 10 should be at least 600 mm x 600 mm as the required stroke for seismic isolation of the Hanshin-Awaji Great Earthquake, and an effective seismic isolation effect can be obtained with only one installation. , Space can be saved.

The seismic isolation device 12 shown in FIG. 10 is the same as the seismic isolation device 1 when the seismic motion in the left-right direction X and / or the front-rear direction Y occurs. The wheel of the rolling member 7 located at the neutral position of the lower portion is guided by the inner surface of the guide groove 6b and rolls in the left-right direction X, and the front-rear guide portion 4b
The wheel of the rolling member 8 located at the neutral position at the lowermost portion in the guide groove 4d is guided by the inner surface of the guide groove 4d and rolls in the front-rear direction Y. However, the support member 5 and the supported body 2 Combined in response to the earthquake motion in the direction of, the rocker swings in series to the position where the first and second stages are integrated, and the seismic isolation function works. Here, the size of the base 4 of the seismic isolation device 13 is 4 strokes as the required stroke when seismic isolation of the Hanshin-Awaji Great Earthquake class is performed in two steps.
A size of about 00 mm × 400 mm is sufficient, and the size can be further reduced as compared with the case where the seismic isolation is performed in one step.

The seismic isolation device 13 shown in FIG. 11 uses the seismic isolation device 1 upside down and the support 3 up, and the supported body 15 below. 15 is a chandelier, the upper surface of the bottom 14a of the gantry 14 is fixed to the support 3, and the supported member 15 is fixed to the lower surface of the support 5a of the support member 5. The support member 5 and the supported member 15 It swings to the left and right and can be seismically isolated. Similarly, the seismic isolation devices 10 and 12 can be used by being turned upside down, and are suitable for seismic isolation of a supported body or the like used by being suspended from above.

[0019]

According to the seismic isolation device of the present invention, the restoring force in the displaced state is proportional to the weight of the supported member, and the natural frequency is independent of the weight. The seismic isolation device works effectively even for long-period seismic motions.Effective seismic isolation can be obtained by installing a single unit. OA equipment and medical equipment for general households and small businesses that can cope firmly with a tall supported body, have sufficient strength with a simple structure, are low cost, and are lightweight and small. , Art objects, hanging articles, etc.
It can be widely used for medium loads such as buildings under space-saving conditions.

[Brief description of the drawings]

FIG. 1A is a plan view, FIG. 1B is a front view, FIG. 1C is a side view, and FIG.
It is the S section enlarged view of (c).

FIG. 2 shows a base of the seismic isolation device of FIG. 1, (a) a plan view,
FIG. 2B is a sectional view taken along line AA, and FIG. 3C is a sectional view taken along line BB.

FIG. 3 shows left and right guide members of the seismic isolation device of FIG. 1;
It is a top view, (b) Front view, (c) Side view.

FIGS. 4A and 4B show examples of a support member and a rolling member around the seismic isolation device of FIG. 1, wherein FIG. 4A is a plan view, FIG. 4B is a front view, and FIG.
FIG. 3 is a cross-sectional view taken along a line C, and FIG.

5A is a plan view and FIG. 5B is a front view of the seismic isolation device of FIG.

6A is a plan view, FIG. 6B is a front view, and FIG. 6C is a side view of the seismic isolation device of FIG.

7A is a plan view, FIG. 7B is a front view, and FIG. 7C is a side view at a neutral position of another example of the seismic isolation device of the present invention.

8A is an explanatory view of a main part showing a state of displacement of the seismic isolation device of FIG. 1 from a neutral position, and FIG. 8B is a view showing a state of displacement of the seismic isolation device of FIG. 7 from a neutral position. FIG.

9A and 9B show another example around the support member and the rolling member of the seismic isolation device of FIG. 1, wherein FIG. 9A is a front view, FIG. 9B is a cross-sectional view taken along line C ′ · C ′, and FIG. It is a line partial cross section enlarged view.

FIG. 10 is a front view of an example in which the seismic isolation devices of FIG. 1 are overlapped and used.

11 is a front view of an example in which the seismic isolation device of FIG. 1 is used in an overturned state.

[Explanation of symbols]

1, 10, 12, 13 Seismic isolation device 2, 15 Supported member 3 Support member 4, 14 Mount 4a, 14a Bottom part 4b, 14b Front and rear guide part 4c, 6a, 11a, 11c, 11d, 14c, 16a
Body member 4d, 4e, 4f, 6b, 6c, 6d, 11b, 14
d, 16b Guide groove 5 Support member 5a Support base 5b Movable member 5c Screw hole 6, 11, 16 Left and right guide part 7, 8 Rolling member 7a Wheel 7b Axle 7c Screw part 7d Bearing fitting part 7e Narrow groove 7f Bearing 7g Snap Ring X left-right direction Y front-rear direction

Claims (8)

[Claims] 1. A pair of one-way guides standing upright on a support in parallel, another direction guides disposed in a direction perpendicular to the one-way guides, and one of the one-way guides. A downwardly concave one-way and other-direction guide groove in which a central portion formed in one direction at a position facing the side of the main body member and in the other direction on the longitudinal side surface of the main body member of the other direction guide forms a lowermost portion; A support member having a movable member that supports a support and is disposed at least on the support side in parallel with the other direction, a wheel rotatably fitted in each of the guide grooves, and the other direction guide portion. A pair of rolling members each having an end portion and an axle fixed to a side facing the other direction guide portion of the movable member, wherein each of the rolling members moves in one direction and / or in each of the guide grooves by seismic motion. Rolling in the other direction to swing the support member, thereby enabling the supported body to be seismically isolated. A seismic isolation device characterized by the following. 2. The one-way guide groove and the other-direction guide groove are vertically cut in two stages with the lowermost part being shifted, and the rolling member is inclined at an end of the other-direction guide portion and a side facing the other-direction guide portion of the movable member. An axle fixed at the intersection position and a wheel fitted at an oblique position to the lowermost portion of the guide groove at the neutral position, and swinging while holding the end surface of the support member substantially horizontal by seismic motion. 2. The method according to claim 1, wherein the supported member is seismically isolated.
Seismic isolation device described in. 3. The relief according to claim 1, wherein the one-way and / or the other-direction guide groove is formed in the one-way and / or the other-direction guide part with a bottom. Quake device. 4. The relief according to claim 1, wherein the one-way and / or the other-direction guide groove is formed so as to penetrate the main body member of the one-way and / or the other direction guide. Quake device. 5. The base according to claim 1, wherein the one-way guide portion is erected in parallel with the opposing edges of the substantially rectangular bottom plate to form a gantry and the bottom plate is placed or fixed on a support. 4. The seismic isolation device according to any one of 4. 6. The support member according to claim 1, wherein a support member for supporting the supported member is provided on the support member, and a movable member is disposed on the support member side of the support member in parallel with the other direction. Seismic isolation device described in. 7. The seismic isolation device according to claim 1, wherein a bearing is interposed between the axle and the wheel. 8. A seismic isolation device wherein a plurality of seismic isolation devices according to any one of claims 1 to 7 are overlapped, and a supporting member is oscillated in series so that a supported member can be isolated. apparatus.