JPH11210822A - Floating preventive device for base isolation structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a structure base-isolatedly supported by a base isolation device from largely floating without impeding the base isolation function of the base isolation device. SOLUTION: A floating preventive device 2 for a detached wooden house is provided with a connecting means 6 comprising locking tools 3 and 4, and a connection mechanism 5 relatively movably connecting the locking tools 3 and 4 in the horizontal direction combined. The locking tool 3 is provided with a cylindrical body 21 and a ring-shaped collar section 23, which is formed integrally with the body section 21 and is internally extended. The locking tool 4 is provided with a cylindrical body 24 and a ring-shaped collar section 25, which is formed integrally with the body section 24 and is internally extended. The connection mechanism 5 is provided with an upper engaging plate 29 with a lower face slidably engaging in the horizontal direction with the upper face of the ring-shaped collar section 23 of the locking tool 3, a lower engaging plate 32 with an upper face slidably engaging in the horizontal direction with the lower face of the ring-shaped collar section 25 of the locking tool 4, and a connecting member 33 connecting the upper and lower engaging plate 29 and 32 to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation structure provided between a lower surface of a structure supported by a seismic isolation device and an upper surface of a foundation to prevent the structure from floating. The present invention relates to a lifting prevention device.

[0002]

[Problems to be Solved by the Invention] A seismic isolation device is arranged between a structure such as a business building, an apartment house, a detached house and a foundation, and the seismic isolation device transmits vibration such as seismic motion to the structure. In addition, the seismic energy is attenuated to prevent damage to the structure due to the earthquake.

When a conventional laminated rubber seismic isolation device is applied to a building having a large aspect ratio, a friction pendulum type seismic isolation device described in Japanese Utility Model Laid-Open No. 5-32505 is particularly heavy. Although it is said that it is suitable for use in relatively small structures because it exhibits the seismic isolation function effectively, it is particularly suitable for structures with a large side area compared to its weight, such as wooden houses. When a seismic isolation device is used, it does not basically have a mechanism for preventing the structure from being lifted, so that the structure may easily be largely lifted by the overturning moment based on the action of the horizontal force due to the wind.
In particular, when a wind force due to a typhoon or the like exceeding the design is applied, this danger becomes extremely large.

[0004] The present invention has been made in view of the above-mentioned points, and an object of the present invention is to make a large lifting of a structure supported by a seismic isolation device be performed by a seismic isolation function of the seismic isolation device. It is an object of the present invention to provide a device for preventing a seismic isolation structure from being lifted without obstructing the structure.

[0005]

According to the present invention, there is provided a seismic isolation structure according to the present invention, which is disposed between a lower surface of a structure supported by a seismic isolation device and an upper surface of a foundation to prevent the structure from floating. The lifting prevention device is a connecting means comprising a set of a first locking tool, a second locking tool, and a connecting mechanism for connecting the first and second locking tools so as to be horizontally movable relatively to each other. In the device for preventing the seismic isolation structure from lifting, the first locking member is fixed at the upper end to the lower surface of the seismically isolated supported structure. And an annular flange formed integrally with the lower end of the main body and extending inward, and the second locking tool is fixed to the upper surface of the foundation at the lower end. A cylindrical main body, and an annular shape formed integrally with the upper end of the main body and extending inward. A flange, and the coupling mechanism has an upper engagement plate having a lower surface slidably engaging in a horizontal direction on an upper surface of the annular collar of the first locking device; A lower engaging plate having an upper surface that slidably engages in a horizontal direction is provided on a lower surface of the annular flange of the locking device, and a connecting member that connects the upper and lower engaging plates to each other.

In the above-described device for preventing the seismic isolation structure from lifting, in the present invention, the first locking member integrally includes another annular flange extending outward at the upper end of the main body. The upper end of the main body of the first locking member is fixed to the lower surface of the seismically isolated structure via the other annular flange, and the second locking The tool is integrally provided with another annular flange extending outward at the lower end of the main body, and the lower end side of the main body of the second locking tool is provided via the other annular flange. Is fixed to the upper surface of the foundation.

[0007] Further, the device for preventing the seismic isolation structure from rising according to the present invention, which is arranged between the lower surface of the structure supported by the seismic isolation device and the upper surface of the foundation and prevents the structure from floating, is provided. A plurality of connecting means comprising a set of a first locking tool, a second locking tool, and a connecting mechanism for connecting the first and second locking tools so as to be movable relative to each other horizontally. In the device for preventing the seismic isolation structure from being lifted, the first locking member is formed integrally with the cylindrical main body and at the lower end of the main body to form an inward direction. An annular collar portion extending to the second body is provided, and the second locking member has a cylindrical main body portion, and an annular shape formed integrally with the upper end of the main body portion and extending inward. And a coupling mechanism, on the upper surface of the annular collar portion of the first locking tool,
An upper engaging plate having a lower surface slidably engaging in a horizontal direction, and a lower engaging member having an upper surface slidably engaging in a horizontal direction on a lower surface of an annular flange portion of a second locking member. A structure comprising a plywood and a connecting member for connecting the upper and lower engaging plates to each other, wherein the main body of the first locking member is seismically isolated and supported on the upper end side in the uppermost connecting means. In the lowermost connection means, the main body of the second locking tool is fixed to the upper surface of the foundation at the lower end side, so that the adjacent connection means In the means, the main body portion of the upper second locking member is fixed to the upper end side of the main body portion of the lower first locking member via a fixing means at the lower end side.

In the above-described device for preventing the seismic isolation structure from lifting, in the present invention, the first locking member integrally includes another annular flange extending outward at the upper end of the main body. The upper end side of the main body portion of the first locking tool in the uppermost connecting means via the other annular flange portion is fixed to the lower surface of the seismically isolated structure, The second locking device is integrally provided with another annular flange portion extending outward at the lower end of the main body portion, and the second engagement member has a lower portion of the lowermost connecting means via the other annular flange portion. The lower end side of the main body of the second lock is fixed to the upper surface of the foundation,
In the adjacent connecting means, another annular flange portion of the upper second locking member is overlapped with another annular flange portion of the lower first locking member. In each of the annular flanges, the lower end of the main body of the second upper locking member is fixed to the upper end of the main body of the first lower locking member via fixing means.

The connecting member of the present invention is screwed to the upper engaging plate at the upper end portion and to the lower engaging plate at the lower end portion to connect the upper and lower engaging plates to each other.

[0010] The fixing means may be a combination of a nut and a bolt, and instead or together with this, welding by welding may be used.

In the lifting prevention device according to the present invention, preferably, between the inner peripheral surface of the main body of the first locking member and the peripheral surface of the upper engaging plate of the connecting mechanism facing the inner peripheral surface, and A cushioning material is interposed on at least one of the inner peripheral surface of the main body of the locking device and the peripheral surface of the lower engagement plate facing the inner peripheral surface. A preferred example of the cushioning member is an elastic member such as rubber, but is not necessarily limited to this. By interposing the cushioning material, it is possible to avoid collision of the main body of the first and second locking members with the upper and lower engagement plates. Note that the cushioning material does not need to be arranged without a gap between each of the above, and may be arranged with a gap on at least one of the inner peripheral surface and the peripheral surface.

In the present invention, examples of the structure supported by seismic isolation include a business building, an apartment house, a detached house, and preferably a detached wooden house having a larger side area than the weight.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described in more detail with reference to the preferred embodiments shown in the drawings. The present invention is not limited to these embodiments.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 to 3, a lift prevention device 2 of this embodiment for preventing a detached wooden house 1 as a structure from being lifted includes a lock 3, a lock 4, and a lock 3. And 4
, A plurality of connecting means 6, and in this example, three connecting means 6, which are connected to each other so as to be able to move relative to each other in a horizontally movable manner.

The detached wooden house 1 is seismically isolated and supported by a friction pendulum-type seismic isolation device 11, and the prevention device 2 includes a lower surface 13 of the detached wooden house 1, for example, a lower surface 13 of a reinforced floor frame 12 and a foundation. 14 and the upper surface 15 thereof.

As shown in FIG. 2, each of the connecting means 6 has the same construction as each other. In each of the connecting means 6, the locking member 3 has a cylindrical main body 21 and an upper end of the main body 21. And an annular flange 22 integrally formed at the lower end of the body 21 and an annular flange 23 integrally formed at the lower end of the main body 21 and extending inward. Tool 4
Is a cylindrical main body 24 and an annular flange 2 formed integrally with the upper end of the main body 24 and extending inward.
5 and an annular flange 26 formed integrally with the lower end of the main body 24 and extending outward.
Is a disc-shaped upper engagement plate 29 having a lower surface 28 slidably engaging in a horizontal direction (H direction) on the upper surface 27 of the flange 23 of the locking device 3, and a flange portion of the locking device 4. 25, a disc-shaped lower engagement plate 32 having an upper surface 31 that slidably engages in a horizontal direction, and a connecting member 33 that connects the upper and lower engagement plates 29 and 32 to each other. I have. Flanges 22 and 2
In each of Nos. 6, a plurality of through holes 36 for inserting the bolts 34 or the anchor bolts 35 embedded in the foundation 14 are formed at equal intervals along the circumferential direction.

The connecting member 33 of this embodiment is a screw rod which is screwed to the upper engaging plate 29 at the upper end 41 and to the lower engaging plate 32 at the lower end 42 to connect the upper and lower engaging plates 29 and 32 to each other. Consists of

In the uppermost connecting means 6, a bolt 34 and a nut 43 are attached to the lower surface 13 of the detached wooden house 1 which is seismically isolated and supported at its upper end via a flange 22 at the upper end side. And the main body 24 of the locking device 4 in the lowermost connecting means 6 is
At its lower end, a fixing means 45 comprising an anchor bolt 35 and a nut 43 is attached to the upper surface 15 of the foundation 14 via the flange 26.
It is fixed by.

In the adjacent connecting means 6 and 6, the flange 26 of the locking tool 4 in the upper connecting means 6 is overlapped with the flange 22 of the locking tool 3 in the lower connecting means 6. In the flanges 26 and 22, the lower end of the main body 24 of the locking tool 4 in the upper connecting means 6 is connected to the main body 2 of the locking tool 3 in the lower connecting means 6.
1 is fixed to the upper end side through fixing means 44 including a bolt 34 and a nut 43.

In this embodiment, the respective inner peripheral surfaces of the main body portions 21 and 24 and the upper and lower engaging plates 29 and 3 facing the inner peripheral surfaces.
2 between the outer peripheral surface and the annular cushioning material 5 made of rubber.
Reference numerals 1 and 52 are fixed to the inner peripheral surfaces of the main body portions 21 and 24 by an adhesive or the like.

Each of the connecting means 6 is formed so that a vertical gap is formed between the locking members 3 and 4 and the connecting mechanism 5, and this gap allows the detached wooden house in the operation of the seismic isolation device 11. 1 is allowed to rise slightly.

In the lifting prevention device 2 described above, a certain amount of relative movement in the horizontal direction between the locking members 3 and 4 in each connecting means 6 is allowed.
4 vibrates in the horizontal direction, this vibration is generated by each connecting means 6.
Are absorbed by the horizontal relative movement of the locking members 3 and 4 and are not transmitted to the detached wooden house 1, while the vertical direction (vertical direction) of the locking members 3 and 4 in each connecting means 6 is different. Is prevented and the connecting means 6 are fixed to each other by the fixing means 44. Therefore, even if a wind-down moment occurs in the detached wooden house 1 due to the wind pressure, this detached moment causes the detached wooden house 1 to fall. Can be largely lifted, and the inconvenience of falling down can be avoided. And since the uplift prevention device 2 allows a certain amount of relative movement of the detached wooden house 1 in the horizontal direction, the seismic isolation device 11 requires the detached wooden house 1 without impairing its seismic isolation function. Will be supported by seismic isolation.

In the horizontal relative movement of the locking members 3 and 4, the direct collision of the upper and lower engaging plates 29 and 32 with the respective main body portions 21 and 24 can be reduced.
This can be avoided by each of 1 and 52, so that generation of sound, damage, and the like can be prevented.

In the above description, the lifting prevention device 2 is constituted by the three-stage connecting means 6. Alternatively, the lifting prevention device 2 may be constituted by one stage, two stages, or four or more stages. Although the main body portions 21 and 24 formed in a cylindrical shape have been illustrated, these may be square main body portions 21 and 24 such as squares, and flange portions 22 and 23 corresponding to the shapes of the main body portions 21 and 24. , 25 and 26 may be formed as rectangular annular members, and the bolt 34 and the nut 4
Instead of the fixing means 44 comprising the fixing member 3, the fixing means such as welding may be used.
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 counterpart material.

One or a plurality of the above-described lifting prevention devices 2 are arranged between the lower surface 13 of the detached wooden house 1 and the upper surface 15 of the foundation 14.

[0026]

According to the present invention, large lifting of a structure supported by the seismic isolation device by the seismic isolation device can be prevented without obstructing the seismic isolation function of the seismic isolation device.

[Brief description of the drawings]

FIG. 1 is a sectional view of a preferred embodiment of the present invention.

FIG. 2 is an explanatory perspective view of one connecting means shown in FIG. 1;

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 device 5 Connecting mechanism 6 Connecting means 11 Seismic isolation device 13 Lower surface 15 Upper surface 21, 24 Main body 23, 25 Flange 29 Upper engaging plate 32 Lower engaging plate 33 Connecting member

Claims (7)

[Claims] An anti-separation device disposed between a lower surface of a structure supported by a seismic isolation device and an upper surface of a foundation to prevent the structure from being lifted, wherein a first locking member is provided. When,
A second locking tool, and a connecting mechanism comprising a pair of a connecting mechanism for connecting the first and second locking tools relatively horizontally to each other, wherein the first locking tool is A cylindrical main body fixed at the upper end to the lower surface of the seismically isolated supported structure; and an annular flange formed integrally with the lower end of the main body and extending inward. A second locking member is formed on the upper surface of the base at a lower end side, and has a cylindrical main body portion, and is integrally formed at an upper end of the main body portion, and has an inward direction. The coupling mechanism has a lower surface slidably engaging in a horizontal direction on an upper surface of the annular flange portion of the first stopper. The upper engagement plate, the lower engagement plate having an upper surface slidably engaging in a horizontal direction on the lower surface of the annular flange of the second locking member, and the upper and lower engagement plates are connected to each other. Floating prevention device seismic isolation structure that includes a connecting member. 2. The first locking device integrally includes another annular flange portion extending outward at an upper end of a main body portion thereof.
The upper end side of the main body of the first locking device is fixed to the lower surface of the seismically isolated structure via the other annular flange, and the second locking device is , At the lower end of the main body unit is integrally provided with another annular flange portion extending outward.
The device for preventing the seismic isolation structure from rising according to claim 1, wherein the lower end side of the main body of the second locking member is fixed to the upper surface of the foundation via the other annular flange. . 3. An anti-separation device disposed between a lower surface of a structure supported by a seismic isolation device and an upper surface of a foundation to prevent the structure from being lifted, wherein the first locking member is provided. When,
A plurality of connecting means comprising a pair of 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 provided in a vertically stacked manner. ,
The first locking device includes a cylindrical main body portion and an annular flange portion formed integrally with the lower end of the main body portion and extending inward. A cylindrical main body, and an annular flange formed integrally with the upper end of the main body and extending inward. An upper engaging plate having a lower surface slidably engaging in the horizontal direction on the upper surface of the flange portion of the second engaging member, and slidably engaging in a horizontal direction on the lower surface of the annular flange portion of the second locking member. A lower engaging plate having an upper surface to be connected, 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 an upper end side. It is designed to be fixed to the lower surface of the structure that is supported by seismic isolation. In the lowermost connecting means, the main body of the second locking device is fixed to the upper surface of the foundation at the lower end side In the adjacent connecting means, the main body of the upper second locking member is fixed at the lower end to the upper end of the main body of the lower first locking member. A device to prevent the seismic isolation structure from being lifted up 4. The first locking device integrally includes another annular flange extending outward at the upper end of the main body.
The upper end side of the main body portion of the first locking tool in the uppermost connection means via the other annular flange portion is fixed to the lower surface of the seismically isolated supported structure, The second locking member is integrally provided with another annular flange extending outward at the lower end of the main body, and the second stopper in the lowermost connecting means is provided via the other annular flange. The lower end side of the main body portion of the locking device is fixed to the upper surface of the foundation, and in the adjacent connecting means, the other annular flange portion of the second locking device on the upper side is connected to the lower side. It is superimposed on another annular flange portion of the first locking device of the first, the lower end side of the main body portion of the upper second side locking device in the other overlapping annular flange portion, 4. The device for preventing a seismic isolation structure from rising according to claim 3, wherein the device is fixed to an upper end side of a main body portion of a lower first locking tool via fixing means. 5. The connecting member according to claim 1, wherein the connecting member is screwed to the upper engaging plate at the upper end portion and to the lower engaging plate at the lower end portion to connect the upper and lower engaging plates to each other. The device for preventing a seismic isolation structure from lifting according to any one of the preceding claims. 6. The device for preventing a seismic isolation structure from rising according to any one of claims 1 to 5, wherein the structure supported by seismic isolation is a detached wooden house. 7. 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 inside the main body portion of the second locking member. The cushioning material is interposed between at least one of the peripheral surface and a peripheral surface of the lower engagement plate facing the inner peripheral surface, the cushioning material being interposed therebetween. Lift prevention device.