JP2001330077A - Base isolation rack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base isolation rack designed to further effectively absorb lateral vibration during the occurrence of an earthquake. SOLUTION: In the lateral vibration during the occurrence of an earthquake, a frame body 20 is run through a running roller 21 on a first rack 12 and a second rack 13 is run on the frame body 20 through the running roller 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation stand for mitigating the sway of an earthquake transmitted to an installation in a building during an earthquake to prevent the installation from overturning. The present invention relates to a seismic isolation base interposed between the installed objects.

[0002]

2. Description of the Related Art Conventionally, seismic isolation mounts have been proposed in which, in the event of an earthquake, the sway of an earthquake transmitted to an installation in a building is reduced to prevent the installation from falling.

FIG. 14 is a cutaway front view showing a conventional base 1.

[0004] The seismic isolation frame 1 is a floor 2 in a building (not shown).
A first base 3 having a planar rectangular shape disposed thereon,
And a second gantry 4 having a rectangular shape in a plane disposed on the gantry 3. An installation object 5 is installed on the second gantry 4 so as to prevent the tumbling of the quake caused by an earthquake. .

On the other hand, the first
A slide means 6 for sliding the second gantry 4 with respect to the first gantry 3 along the arrow X direction is provided between the gantry 3 and the second gantry 4.

The slide means 6 comprises a plurality of running rollers 8 rotatably supported by a plurality of support members 7 fixed to the lower surface of the second gantry 4. In addition,
The running roller 8 is made of hard metal or synthetic resin.

[0007] According to the above-described seismic isolation mount 1, the floor 2 moves along the direction of the arrow X with respect to the installation object 5 due to the lateral shaking during the earthquake.
When the quake vibrates, the vibration energy is absorbed by the second gantry 4 traveling in the direction of the arrow X with respect to the first gantry 3, and the installation object 5 installed on the second gantry 4 can be overturned. Prevention.

[0008]

According to the conventional seismic isolation mount 1 described above, when the second mount 4 travels in the direction of the arrow X due to the shaking of the earthquake, the maximum traveling distance of the installation object 5 is as follows. The travel distance of the second gantry 4 is equal to the travel distance of the second gantry 4, and the travel distance of the traveling roller 8 disposed on the right side of FIG. This is the distance L until the running stops, and the running distance is extremely short.

For this reason, when a large roll occurs in the event of an earthquake, the travel distance of the second gantry 4 traveling on the first gantry 3 is ensured to be large, whereby the energy of the roll can be effectively reduced. There is a possibility that it may not be possible to prevent the installation object 5 from falling over due to absorption.

The present invention has been made in view of the above-mentioned circumstances, and has as its object to provide a seismic isolation gantry that can more effectively absorb a roll during an earthquake.

[0011]

In order to solve the above-mentioned problems, according to the present invention, a first gantry is provided on a floor of a building, and a first gantry is provided on the first gantry via a slide means. And an installation object to be installed in the building is disposed on the second gantry, and the rolling in the event of an earthquake is controlled by the second gantry on the first gantry via the sliding means. In the seismic isolation gantry wherein the gantry is relaxed by traveling, the sliding means is supported on a frame separate from the first gantry and the second gantry, and is rotatably supported on the frame. And the running roller is configured to run the frame on the first gantry via the running roller against a roll in the event of an earthquake, and on the frame via the running roller. The second
Gantry runs.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a seismic isolation frame according to the present invention will be described below in detail.

FIG. 1 is a partially cutaway perspective view of a base isolation gantry 10 according to the present invention.

The seismic isolation frame 10 also includes a first rectangular frame 12 disposed on a floor 11 in a building and a second rectangular frame mounted on the first frame 12. Stand 13
A sliding means 14 disposed between the second gantry 13 and the first gantry 12 to slide the second gantry 13 with respect to the first gantry 12 along the arrow X direction; An installation object 15 is installed on the second gantry 13 to prevent the vehicle from falling down due to the roll of the earthquake.

In addition, between the second stand 13 and the floor 11,
Return springs 16 for returning the second gantry 13 to the initial position in FIG. 1 are arranged to face each other.

On the other hand, the above-mentioned slide means 14 comprises a frame 20 having a rectangular shape in a plane, and four running rollers 21 rotatably supported on the side of the frame 20 via a shaft. I have. The running roller 21 is also made of hard metal or synthetic resin.

Next, the operation of the seismic isolation gantry 10 will be described, and the configuration will be described in more detail.

FIG. 2 is a front sectional view of the seismic isolation gantry 10 according to the present invention, in which the return spring 16 shown in FIG. 1 is omitted for convenience of explanation.

When an earthquake occurs from the initial position of the installation object 15 shown in FIG. 2 and the second base 13 moves in the direction of the arrow X due to the roll thereof, as shown in FIG. Each of the running rollers 21 of the slide means 14 that contacts the first frame 12 rotates, so that the frame 20 simultaneously runs on the first gantry 12 in the arrow X direction.

As described above, the frame 20 travels on the first gantry 12 in the direction of the arrow X via the respective traveling rollers 21 of the sliding means 14, and the second gantry 13 travels via the respective traveling rollers 21. 20, the traveling roller 21 on the right side of the drawing moves the bollard 1 of the first gantry 12 as shown in FIG.
2a, the traveling of the frame 20 stops, and at the same time, the first
Of the frame 13 on the left side of the drawing comes into contact with the traveling roller 21 on the left side of the drawing to stop the traveling.

As described above, the frame 20 of the slide means 14 travels on the first gantry 12 due to the lateral shaking during the earthquake, and the second gantry 1 moves on the frame 20 of the slide means 14.
When the vehicle 3 travels, as shown in FIG. 4, the total traveling distance L 'of the second gantry 13 with respect to the first gantry 12 is much larger than the total traveling distance L of the second gantry 4 shown in FIG. (L ′> L) Therefore, even when a large roll occurs during an earthquake, the traveling distance of the second gantry 13 on which the installation object 15 is mounted is ensured to be large, and thereby the energy of the roll is reduced. This effectively absorbs and prevents the installation object 15 from tipping over as much as possible.

When the roll caused by the earthquake is resolved, the second
Is returned to the initial position in FIG. 2 by the urging force of the return spring 16 shown in FIG.

On the other hand, as shown in FIG.
If the total traveling distance L ′ of the second gantry 13 is large, the position of the center of gravity of the installation object 15 with respect to the frame 20 shifts, and the second gantry 13 may fall off from the first gantry 12 and the frame 20. Therefore, in the embodiment, as shown in FIG. 5 which is an enlarged sectional view taken along the line AA of FIG. 2, the second frame 13 is provided at the front end or the rear end of the frame body 20 or at both ends thereof.
Further, a connecting means 30 for preventing falling off from the frame body 20 is provided.

The connecting means 30 extends along the moving direction of the second gantry 13 and the frame 20, that is, along the direction of arrow X in FIG. 2 along the surface of the first gantry 12 and the lower surface of the second gantry 13. T-shaped guide grooves 12b and 13b formed
And a cross section T to be inserted into each of the guide grooves 12b and 13b.
And a connecting rod 31 having a U-shaped front end 31a and a rear end 31b.

The connecting rod 31 is fixed to the front end, the rear end, or both ends of the frame 20.

According to such a connecting means 30, when the second gantry 13 and the frame body 20 move in the direction of the arrow X, the leading end 31a and the rear end 31b of the connecting rod 31 are brought into the guide groove 1 position.
2b and 13b, they move while sliding. Therefore, as shown in FIG. 4, even if the position of the center of gravity of the installation object 15 with respect to the frame body 20 is shifted, the second base 13 and the first base 1 are moved.
Since the second frame 13 is engaged with the second frame 13 by the connecting means 30, the second frame 13 can be prevented from dropping from the first frame 12 and the frame 20.

The connecting means 30 is provided with a guide groove 12b, 1 having a T-shaped cross section formed along the arrow X direction.
Since the connecting rod 31 slides in the inside 3b, the connecting means 30 also functions as guide means for controlling the traveling direction of the frame 20 and the traveling roller 21.

In the above-described embodiment, the guide grooves 12b and 13b having a T-shaped cross section which constitute one of the connecting means 30 are formed along the surface of the first gantry 12 and the lower surface of the second gantry 13. However, the present invention is not limited to the above embodiment, and guide grooves 12b and 13b having a T-shaped cross section are formed on the surface of the first gantry 12 as shown in FIG. And a plurality of ribs 32 having a substantially L-shaped cross section and fixed along the lower surface of the second gantry 13.

In the above embodiment, the connecting means 30 is connected to the guide groove 12 having a T-shaped cross section formed along the arrow X direction.
5 and 13b, and the connecting rod 31 guided along the guide grooves 12b and 13b while being engaged with the guide grooves 12b and 13b. However, the present invention is not limited to the above embodiment, and the same parts as those in FIG. As shown in FIG. 7 indicated by reference numerals, the linking means 30 is provided in the frame body 20 by a link mechanism 42 including a pair of arms for connecting the second frame 13 and the first frame 12 to each other. It may be configured.

The connecting means 30 comprising the link mechanism 42
The first arm 40 has one end rotatably supported on the upper surface of the first gantry 12 via a shaft 43, and the other end of the first arm 40 has one end rotatably via a shaft 44. A second arm 41 is supported, and the other end of the second arm 41 is rotatably supported on the lower surface of the second base 13 via a shaft 45.

According to the connecting means 30 including the link mechanism 42, FIG. 8 and FIG.
When the second gantry 13 moves in the direction of the arrow X, the pair of arms 40 and 41 expand accordingly around the shaft 44 to allow the movement in the direction of the arrow X. The gantry 13 is prevented from falling off from the first gantry 12 and the frame 20.

Since the connecting means 30 comprising the link mechanism 42 does not have a function as a guide means for controlling the traveling direction of the frame 20 and the traveling roller 21, a separate guide means must be provided.

FIG. 10 is a sectional view of an essential part showing an embodiment in which the guide means 50 is provided on the seismic isolation frame 10 according to the present invention having the connecting means 30 comprising the link mechanism 42, and the same parts as those in FIG. Show.

The guide means 50 extends along the moving direction of the second gantry 13 and the frame 20, that is, the direction of the arrow X in FIG. 2, along the surface of the first gantry 12 and the lower surface of the second gantry 13. The formed guide grooves 12c and 13 having a U-shaped cross section
c, and a guide plate 51 fitted into each of the guide grooves 12c and 13c.
Are fixed to the sides of the frame 20.

According to the guide means 50 including the guide grooves 12c and 13c and the guide plate 51 inserted into the guide grooves 12c and 13c, the second frame 1
When the frame 3 and the frame body 20 move in the arrow X direction, the upper and lower ends of the guide plate 51 move while being fitted into the guide grooves 12c and 13c formed along the arrow X direction. The traveling direction of the frame body 20 and the traveling roller 21 is
Control is performed in the direction along the guide grooves 12c and 13c, that is, in the direction along the arrow X direction in FIG.

The connecting means 30 comprising a link mechanism 42
The guide means 5 is attached to the seismic isolation frame 10 according to the present invention having
The embodiment in which 0 is provided is not limited to the above embodiment, and the moving direction of the second gantry 13 and the frame 20 as shown in FIG. A pair of L-shaped guide rails 60 and 61 are provided along the surface of the first gantry 12 and the lower surface of the second gantry 13 along the arrow X direction of FIG. On the other hand, guide rollers 70 and 71 that are in sliding contact with the respective guide rails 60 and 61 may be provided.

As described above, the guide means 50 slides on the pair of guide rails 60 and 61 provided on the surface of the first gantry 12 and the lower surface of the second gantry 13, and the pair of guide rails 60 and 61. When the guide roller 70 and the guide roller 70 are in contact with each other, the frame 20 and the traveling roller 21 at the time of rolling
Is controlled in a direction along the pair of guide rails 60, 61, that is, in a direction along the arrow X direction in FIG.

In the above embodiment, the moving directions of the second gantry 13 and the frame body 20 are shown in FIG.
However, the present invention is not limited to the above embodiment, and as shown in FIG.
The moving direction of the second gantry 13 and the frame 20 is changed to the first gantry 12
The direction may be along the hypotenuse 12d.

It should be noted that the second frame 13 and the frame 2
In the case where the moving direction of 0 is along the oblique side 12d of the first gantry 12, as shown in FIG. 12, the mounting position of the traveling roller 21 provided on the frame 20 is a rectangular frame. 2
It may be attached to each vertex of 0.

As described above, when the moving direction of the second gantry 13 and the frame 20 is the direction along the oblique side 12d of the first gantry 12, as shown in FIG. 2
0 can further secure the moving distance to absorb the roll, and even when the first and second gantry 12, 13 having a small size on one side are used, the moving distance is further increased. Since it can be secured, it is possible to promote downsizing of the seismic isolation frame 10.

In the above embodiment, the seismic isolation base for preventing the roll in the direction of the arrow X has been described in detail. However, it is needless to say that the arrow X and the direction perpendicular to the arrow X (this direction is referred to as the Y direction), and those It is also possible to provide a seismic isolation gantry for preventing a roll in the combined direction. In this case, a pair of seismic isolation gantry 10 according to the present invention is used, and one of them is oriented so as to move in the arrow X direction. And the other may be arranged to move in the Y direction orthogonal to the arrow X.

[0042]

As described above, in the seismic isolation frame of the present invention, the frame is caused to run on the first frame via the roller of the sliding means in response to the roll in the event of an earthquake. Since the second gantry is made to travel on the top via the traveling roller, the traveling distance of the second gantry on which the installation object is mounted with respect to the first gantry is ensured to be large, thereby effectively reducing the energy of the roll. It is possible to prevent the installation object from falling down as much as possible.

[Brief description of the drawings]

FIG. 1 is a conceptual perspective view of a seismic isolation gantry according to the present invention.

FIG. 2 is a conceptual front view of the seismic isolation gantry according to the present invention.

FIG. 3 is a view showing the operation of the seismic isolation gantry according to the present invention.

FIG. 4 is a view showing the operation of the seismic isolation gantry according to the present invention.

FIG. 5 is an AA enlarged sectional view of FIG. 1 showing the seismic isolation gantry according to the present invention.

FIG. 6 is a conceptual perspective view showing another embodiment of the seismic isolation gantry according to the present invention.

FIG. 7 is a conceptual perspective view showing still another embodiment of the base isolation frame according to the present invention.

FIG. 8 is a conceptual cross-sectional view of BB in FIG. 7;

FIG. 9 is a view showing the operation of the seismic isolation gantry shown in FIG. 7;

FIG. 10 is a view showing another embodiment of the guide means.

FIG. 11 is a view showing still another embodiment of the guide means.

FIG. 12 is a view showing another embodiment of the sliding means.

FIG. 13 is a view showing the operation of the seismic isolation gantry shown in FIG. 12;

FIG. 14 is a plan view showing a conventional seismic base.

FIG. 15 is a plan view showing the operation of a conventional seismic isolation gantry.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Seismic isolation stand 11 ... On floor 13 ... Second stand 12 ... First stand 12b, 13b, 12c, 13c ... Guide groove 14 ... Sliding means 20 ... Frame body 21 ... Running roller 30 ... Connecting means 31 ... Connecting rod 42 link mechanism 50 guide means 51 guide plate 60, 61 guide rail 70, 71 guide roller

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Junichi Morino 3-9-3 Kitasenzuka, Ota-ku, Tokyo F-term (reference) 3J048 AA06 BE15 DA01 EA13

Claims (7)

[Claims] 1. A system comprising a first gantry arranged on a floor of a building and a second gantry arranged on the first gantry via a slide means. In the seismic isolation frame provided on the second frame, the rolling in the event of an earthquake is reduced by running the second frame on the first frame via the slide means. The sliding means is composed of a frame body separate from the first frame and the second frame, and a traveling roller rotatably supported by the frame body; On the other hand, the frame is run on the first gantry via the running roller, and the second gantry runs on the frame via the running roller. Seismic isolation mount. 2. The apparatus according to claim 1, wherein said first frame is connected to a second frame via said frame.
The seismic isolation mount according to claim 1, wherein a connecting means for preventing mutual drop-off is provided between the base and the base. 3. The connecting means includes a guide groove having a T-shaped cross section formed along a surface of the first gantry and a lower surface of the second gantry, and a cross section T inserted into the guide groove. The seismic isolation gantry according to claim 2, comprising a connecting rod having a U-shaped front end and a rear end formed therein, wherein the connecting rod is fixed to the frame. 4. The connecting means is provided in the frame,
The seismic isolation gantry according to claim 2, wherein the gantry is a link mechanism including a pair of arms for connecting between a second gantry and the first gantry. 5. The connecting means comprising the link mechanism is provided with a guide means for controlling a traveling direction of the second gantry and the frame relative to the first gantry. (4) Seismic isolation stand described. 6. The guide means includes: a guide groove having a U-shaped cross section formed along a surface of the first gantry and a lower surface of the second gantry; The seismic isolation base according to claim 5, wherein the base plate is a guide plate to be inserted into the groove. 7. A guide rail having a pair of L-shaped cross sections disposed along a surface of the first gantry and a lower surface of the second gantry, and a side of the frame body. The seismic isolation gantry according to claim 5, further comprising a guide roller disposed on the guide rail and slidingly contacting the guide rail.