JP4000652B2 - Seismic isolation structure lift prevention device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a device for preventing a seismic isolation structure from being lifted, which is disposed between a lower surface of a structure and a top surface of a foundation that are supported by a seismic isolation device to prevent the structure from lifting.
[0002]
[Problems to be solved by the invention]
A seismic isolation device is placed between the structure and foundations of business buildings, apartment buildings, detached houses, etc., and this seismic isolation device prevents vibrations such as seismic vibrations from being transmitted to the structure. It is attenuated to prevent damage to the structure due to the earthquake.
[0003]
When the conventional laminated rubber seismic isolation device is applied to a building having a large aspect ratio, the friction pendulum type seismic isolation device described in Japanese Utility Model Laid-Open No. 5-32505 has a relatively small weight. Although it is said that it is suitable for this because it effectively exhibits the seismic isolation function even when used for structures, this seismic isolation device is especially suitable for structures with large side areas compared to their weight, such as wooden houses. When the is used, since it basically does not have a mechanism for preventing the structure from lifting, the structure may be easily lifted greatly by the overturning moment based on the action of the horizontal force by the wind. In particular, when a wind force such as a typhoon exceeding the design is added, this fear becomes extremely large.
[0004]
The present invention has been made in view of the above-described points, and the object of the present invention is to prevent the seismic isolation function of the seismic isolation device from causing a large lift of the structure supported by the seismic isolation device. An object of the present invention is to provide a device for preventing the seismic isolation structure from being lifted up.
[0007]
Is disposed between the upper surface of the lower surface and the base of the seismic isolation supported by the structure by seismic isolation device, lifting prevention device seismic isolation structure of the present invention to prevent the floating of the structure, the first engagement A plurality of connecting means consisting of a set of a stopper, a second locking tool, and a connecting mechanism for connecting the first and second locking tools so as to be horizontally movable relative to each other are stacked vertically. In this seismic isolation structure lifting prevention device, the first locking member includes a cylindrical main body portion and an annular hook integrally formed at the lower end of the main body portion and extending inward. The second locking tool includes a cylindrical main body portion and an annular flange portion formed integrally with the upper end of the main body portion and extending inward. The coupling mechanism has a lower surface that is slidably engaged in the horizontal direction on the upper surface of the annular flange of the first locking member. The upper engagement plate, the lower engagement plate having an upper surface that is slidably engaged in the horizontal direction on the lower surface of the annular hook portion of the second locking tool, and the connection for connecting the upper and lower engagement plates to each other In the uppermost connection means, the main body portion of the first locking member is fixed to the lower surface of the structure to be seismically isolated on the upper end side thereof, In the lower connecting means, the main body portion of the second locking tool is fixed to the upper surface of the foundation on the lower end side thereof. The main body portion is fixed to the upper end side of the main body portion of the lower first locking member on the lower end side thereof by fixing means, and the connecting member is connected to the upper engagement plate at the upper end portion and at the lower end portion. The upper engaging plate and the lower engaging plate are connected to each other by screwing with the lower engaging plate, and the first engaging tool and the second engaging tool, Between the focusing mechanism, a slight lifting up and down direction of the gap enough to allow the structures in the operation of the isolator is formed.
[0008]
In the above seismic isolation structure lifting prevention device, in the present invention, the first locking member is integrally provided with another annular flange portion extending outward at the upper end of the main body portion. The upper end side of the main body portion of the first locking member in the uppermost connecting means is fixed to the lower surface of the structure to be seismically isolated through the annular flange portion of the The locking device is integrally provided with another annular flange portion extending outwardly at the lower end of the main body portion, and the second engagement member in the lowermost connecting means is connected via the other annular flange portion. The lower end side of the main body of the stopper is fixed to the upper surface of the foundation, and in the adjacent connecting means, the other annular flange of the second locking member on the upper side is the second side of the lower side. It is overlapped with the other annular flange of the one locking device, and in the other annular flanges overlapped with each other, The lower end of the main body portion of the fastener is fixed to the upper end side of the main body portion of the first locking member of the lower stage through the anchoring means.
[0010]
The fixing means may be a combination of nuts and bolts, or may be welding by welding instead of or together with this.
[0011]
In the lifting prevention device of the present invention, preferably, between the inner peripheral surface of the main body portion of the first locking member and the peripheral surface of the upper engagement plate of the coupling mechanism facing the inner peripheral surface, and the second locking A cushioning material is interposed on at least one of the inner peripheral surface of the main body of the tool and the peripheral surface of the lower engagement plate of the coupling mechanism facing the inner peripheral surface. As this buffer material, an elastic member such as rubber can be cited as a suitable example, but is not necessarily limited thereto. By interposing this buffer material, it is possible to avoid collision between the main body portions of the first and second locking members and the upper and lower engagement plates. Note that the cushioning material does not have to be disposed between the above-described gaps, and may be disposed with a gap with respect to at least one of the inner circumferential surface and the circumferential surface.
[0012]
Examples of the structure to be seismically isolated in the present invention include business buildings, apartment houses, and detached houses, and preferably detached wooden houses having a large side area compared to the weight.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described in more detail based on preferred examples shown in the drawings. The present invention is not limited to these examples.
[0014]
【Example】
1 to 3, the lift prevention device 2 of the present example for preventing the lift of the detached wooden house 1 as a structure includes a locking tool 3, a locking tool 4, and the locking tools 3 and 4. A plurality of connecting means 6, which in this example are stacked in a vertical direction, are provided with a connecting mechanism 5 that is relatively horizontally movable.
[0015]
The detached wooden house 1 is supported by a friction pendulum type seismic isolation device 11, and the prevention device 2 is the lower surface of the detached wooden house 1, for example, the lower surface 13 of the reinforcing floor frame 12 and the upper surface of the foundation 14. 15 is arranged between.
[0016]
Each of the connecting means 6 is configured in the same manner as shown in FIG. 2, and in each of the connecting means 6, the locking tool 3 is integrated with the cylindrical main body 21 and the upper end of the main body 21. And an annular flange 22 formed outwardly extending and an annular flange 23 integrally formed at the lower end of the main body 21 and extending inward. A cylindrical main body 24; an annular flange 25 formed integrally with the upper end of the main body 24 and extending inward; and an outer ring formed integrally with the lower end of the main body 24. The connecting mechanism 5 has a lower surface 28 that is slidably engaged in the horizontal direction (H direction) with the upper surface 27 of the flange 23 of the locking tool 3. A disc-like upper engagement plate 29 having a top surface 3 and a top surface 3 that is slidably engaged in a horizontal direction with a lower surface 30 of the flange 25 of the locking member 4. A disk-shaped lower engaging plate 32 having a, and a connecting member 33 for connecting the upper and lower engaging plate 29 and 32 to each other. A plurality of through holes 36 through which the bolts 34 or anchor bolts 35 embedded in the foundation 14 are inserted are formed at equal intervals along the circumferential direction in each of the flange portions 22 and 26.
[0017]
The connecting member 33 of the present example includes a screw rod that is screwed into the upper engaging plate 29 at the upper end portion 41 and the lower engaging plate 32 at the lower end portion 42 to connect the upper and lower engaging plates 29 and 32 to each other. Yes.
[0018]
In the uppermost connection means 6, the main body portion 21 of the locking tool 3 is fixed to the lower surface 13 of the detached wooden house 1 that is supported by seismic isolation via the flange portion 22 at its upper end side. In the lowermost connecting means 6, the main body portion 24 of the locking tool 4 is composed of an anchor bolt 35 and a nut 43 on the upper surface 15 of the foundation 14 via the flange portion 26 at the lower end side. It is fixed by the fixing means 45.
[0019]
In the adjacent connecting means 6 and 6, the hook part 26 of the locking tool 4 in the upper connecting means 6 is overlapped with the hook part 22 of the locking tool 3 in the lower connecting means 6, and this overlapped hook part. 26 and 22, the lower end side of the main body portion 24 of the locking member 4 in the upper connection means 6 includes a bolt 34 and a nut 43 on the upper end side of the main body portion 21 of the locking tool 3 in the lower connection means 6. It is fixed via fixing means 44.
[0020]
In this example, between the inner peripheral surfaces of the main body portions 21 and 24 and the peripheral surfaces of the upper and lower engaging plates 29 and 32 that face the inner peripheral surface, annular cushioning members 51 made of rubber and 52 is fixed to the inner peripheral surfaces of the main body portions 21 and 24 by an adhesive or the like.
[0021]
In addition, each connection means 6 is comprised so that an up-down direction clearance gap may arise between the latching tools 3 and 4 and the connection mechanism 5, and, with this clearance gap, some of the detached wooden houses 1 in the operation of the seismic isolation device 11 Is allowed to float.
[0022]
In the above-described anti-lifting device 2, since a certain amount of relative movement in the horizontal direction between the locking members 3 and 4 in each connecting means 6 is allowed, even if the foundation 14 vibrates in the horizontal direction due to an earthquake, This vibration is absorbed by the relative movement of the locking members 3 and 4 of each connecting means 6 in the horizontal direction and is not transmitted to the detached wooden house 1, while the locking tools 3 and 4 in each connecting means 6. Since the vertical direction (vertical direction) is prevented from being separated from each other and the connecting means 6 are fixed to each other by the fixing means 44, even if a falling moment occurs in the detached wooden house 1 due to wind pressure, It is possible to avoid the inconvenience that the detached wooden house 1 rises greatly due to the falling moment and falls. And since the anti-lifting device 2 allows a certain amount of relative movement of the detached wooden house 1 in the horizontal direction, the seismic isolation device 11 desires the detached wooden house 1 without hindering its seismic isolation function. Will support the seismic isolation.
[0023]
Further, in the relative movement of the locking members 3 and 4 in the horizontal direction, a direct collision of the upper and lower engagement plates 29 and 32 with the respective main body portions 21 and 24 is caused by the buffer materials 51 and 52, respectively. It is possible to avoid the occurrence of sound and damage.
[0024]
In the above, the anti-lifting device 2 is configured by the three-stage connecting means 6, but instead of this, the anti-lifting device 2 may be configured by one, two, or four or more stages, and is further cylindrical. The formed main body portions 21 and 24 are illustrated, but these may be rectangular tube-like main body portions 21 and 24, and the flange portions 22, 23, 25, and 25 corresponding to the shapes of the main body portions 21 and 24, respectively. 26 may be formed of a rectangular annular body, or may be implemented by a fixing means such as welding instead of the fixing means 44 including the bolt 34 and the nut 43. In this case, the flange 22 And 26 may be omitted, and the upper end of the main body 21 and the lower end of the main body 24 may be directly welded to the mating member.
[0025]
One or a plurality of the above-described anti-lifting devices 2 are disposed between the lower surface 13 of the detached wooden house 1 and the upper surface 15 of the foundation 14.
[0026]
【The invention's effect】
According to the present invention, it is possible to prevent a large lift of a structure that is seismically isolated by the seismic isolation device without impairing the seismic isolation function of the seismic isolation device.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a preferred embodiment of the present invention.
2 is an explanatory perspective view of one connecting means in the example shown in FIG. 1; FIG.
FIG. 3 is an explanatory diagram when the example shown in FIG. 1 is used together with a seismic isolation device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Detached wooden house 2 Lift prevention device 3, 4 Locking tool 5 Connection mechanism 6 Connection means 11 Seismic isolation device 13 Lower surface 15 Upper surface 21, 24 Main body part 23, 25 Gutter part 29 Upper engagement plate 32 Lower engagement plate 33 Connection member

Claims (4)

A prevention device arranged between the lower surface of the structure and the upper surface of the foundation, which is supported by the seismic isolation device, to prevent the structure from being lifted up. A plurality of connecting means that are stacked in the vertical direction, and each of which includes a locking mechanism and a coupling mechanism that couples the first and second locking tools so as to be relatively horizontally movable relative to each other; The locking device includes a cylindrical main body portion and an annular flange portion that is integrally formed at the lower end of the main body portion and extends inward, and the second locking device is a cylindrical shape. And an annular collar formed integrally with the upper end of the main body and extending inward, and the coupling mechanism is an annular collar of the first locking member. The upper engagement plate having a lower surface that is slidably engaged in the horizontal direction on the upper surface of the portion, and the lower surface of the annular collar portion of the second locking tool is slidable in the horizontal direction. A lower engaging plate having an upper surface to be engaged, and a connecting member for connecting the upper and lower engaging plates to each other. In the uppermost connecting means, the main body portion of the first locking tool has its upper end It is designed to be fixed to the lower surface of the structure that is seismically isolated on the side, and in the lowermost connecting means, the main body portion of the second locking tool is fixed to the upper surface of the foundation on the lower end side. In the adjacent connecting means, the main body portion of the second locking device on the upper stage side has a fixing means on the upper end side of the main body portion of the first locking device on the lower stage side on the lower end side thereof. The connecting member is screwed to the upper engagement plate at the upper end and the lower engagement plate at the lower end to connect the upper and lower engagement plates to each other. Between the locking device and the second locking device and the coupling mechanism, there is a slight lifting of the structure during the operation of the seismic isolation device. Floating prevention device seismic isolation structure vertical clearance enough to volume is formed. The first locking member is integrally provided with another annular flange portion extending outward at the upper end of the main body portion, and the first locking member in the uppermost connecting means is connected via the other annular flange portion. The upper end side of the main body part of one locking tool is fixed to the lower surface of the structure to be seismically isolated, and the second locking tool extends outwardly to the lower end of the main body part. Another annular flange is integrally provided, and the lower end side of the main body portion of the second locking member in the lowermost connecting means is fixed to the upper surface of the foundation through the other annular flange. In the adjacent connecting means, the other annular flange of the upper second locking device is overlapped with the other annular flange of the lower first locking device. And the lower end side of the body portion of the second locking member on the upper side is connected to the lower first side via the fixing means. Floating prevention device seismic isolation structure according to claim 1 which is fixed to the upper end of the main body portion of the fastener. The apparatus for preventing the seismic isolation structure from being lifted up according to claim 1 or 2 , wherein the structure to be seismically isolated is a detached wooden house. Between the inner peripheral surface of the main body portion of the first locking member and the peripheral surface of the upper engaging plate of the coupling mechanism facing the inner peripheral surface, and the inner peripheral surface of the main body portion of the second locking device and the inner The lifting prevention device according to any one of claims 1 to 3 , wherein a cushioning material is interposed between at least one of the connecting mechanism and the peripheral surface of the lower engagement plate facing the peripheral surface.

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