JP2001241209A - Seismic isolation equipment used against wind and earthquake in common - Google Patents

Abstract

PROBLEM TO BE SOLVED: To instantly and definitely release the fixation between a structure and a foundation during earthquake without making generating malfunction during weak vibration and further reducing the cost with a relatively simple construction by fixing the structure and the foundation in ordinary times thereby avoiding the vibration of the structure due to wind and also by the seismic isolation equipment operating for common use against the wind and the earthquake. SOLUTION: The seismic isolation equipment 4 and fixed release equipment 6 are arranged between the lower beam or a seismic isolation structural base 2 or foundation 3 of a building 1, the fixed release equipment 6 is installed by inserting a tapered pin member 13 to fitting hole 11, 12 formed on an upper plate 10a of a support base 10 on the foundation and a bottom plate 2a of the building, this pin member 13 is supported from the bottom with a tiltable support member 14 attached with a weight 15 of the pin member 13, and is pushed downward with a spring member. The bottom plate 2a and the upper plate 10a are fastened by a floating prevention device 7 consisting of a loose hole 30, a washer 31 and a bolt nut 32 for preventing uplift of the building due to storing wind.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation device used for a relatively lightweight structure such as a detached house. Only the seismic isolation device for wind and earthquake that activates the seismic isolation device.

[0002]

2. Description of the Related Art When a relatively lightweight detached house is seismically isolated, the number of seismic isolation devices is reduced, or a seismic isolation device having a relatively small horizontal rigidity is used. There is a problem that the building is liable to vibrate due to a wind load or the like because it can operate. For this reason, conventionally, in order to prevent wind loads, etc., the lower part of the building and the foundation have been connected and fixed, and the seismic isolation device has not been activated. Various devices have been proposed.

For example, a lower part of a building and an upper part of a foundation are connected and fixed via a ball which can be lowered or a pin which can be raised, and a weight sphere supported on an upper part of a support member is dropped by an earthquake. A device has been proposed in which a rotating arm or the like is actuated by dropping to release the fixed state of the fixing ball or pin member (Japanese Utility Model Application Laid-Open No. 60-129439 (Seismic isolation mechanism fixing release device)).

[0004]

However, in the above-described conventional apparatus, the weight sphere placed on the support member is dropped by vibration and the fixed state is released via an arm or the like. Cannot be activated
There was a problem that the weight ball could fall due to weak vibration and malfunction. Further, the structure of the apparatus is complicated, and there has been a problem that costs such as facility costs and maintenance are increased. Further, in the case of an electrical device, if a power failure occurs during an earthquake, the device may not operate.

The present invention has been made to solve such a problem, and an object of the present invention is to instantaneously and reliably release the fixing of a structure and a foundation when an earthquake occurs.
Another object of the present invention is to provide a wind / earthquake seismic isolation device that does not malfunction due to weak vibration and that can reduce costs with a relatively simple structure.

[0006]

According to the first aspect of the present invention, the wind
The seismic isolation device for earthquakes comprises a seismic isolation device (isolator, damper, etc.) and a fixed release device arranged between the lower part of the structure (lower beam of the building, seismic isolation gantry, etc.) and the foundation. The device includes a pin member that is vertically movably inserted into a fitting hole formed in the lower part of the structure and the upper part of the support base on the foundation,
It is characterized by having a support member supported on the foundation so as to be tiltable in the horizontal direction and supporting the pin member from below, and a weight provided at an intermediate portion of the support member. It is preferable that the pin member and the fitting hole have a taper that narrows upward. In addition, it is preferable that the weight penetrates the support member and the weight is fixed to the support member so that the vertical position can be adjusted. Further, it is preferable that a sliding material is interposed between the lower part of the structure and the support on the foundation to reduce sliding resistance during an earthquake.

According to a second aspect of the present invention, there is provided the seismic isolation device for wind and earthquake according to the first aspect, wherein a pressing member (such as a spring member) for pressing the pin member against the supporting member is added to the fixing and releasing device. It is characterized by. It is preferable to use a tension spring, a compression spring, or the like as the spring member, and press the pin member against the support member with the tensile force or the compressive force.

According to a third aspect of the present invention, there is provided the seismic isolation device for wind and earthquake according to the first or second aspect, wherein the lower part of the structure and the upper part of the support on the foundation are relatively moved in the horizontal direction. It is characterized by having a lifting prevention device which is fastened by a fastening member as much as possible. The lifting prevention device is composed of, for example, a bolt and a nut, a circular loose hole in a plan view into which the bolt is inserted, and a washer having a diameter larger than the loose hole. Further, it is preferable that a sliding material is interposed between the lower part of the structure and the support on the foundation to reduce the sliding resistance during an earthquake.

In the above configuration, the pin member is normally inserted into the fitting holes formed on the structure side and the base side, and this state is held by the support member. To prevent the structure from vibrating due to a wind load or the like. The pin member is supported from below by the support member, and the pin member is pressed against the support member by the pressing member, so that the support member does not fall over due to wind or vibration of an automobile or the like, thereby preventing malfunction.

When a seismic force exceeding a predetermined level acts, the support member falls down from the upright support state due to the inertial force of the weight, the pin member falls, the structure and the foundation are released from being fixed, and the seismic isolation device operates, The structure is isolated by the isolator, or the vibration of the structure is reduced by the damper. The weight moves in response to an earthquake in any direction, and the weight directly releases the support of the pin member, so there is no structural play and the seismic isolation device can be instantaneously activated in the event of an earthquake. it can.
If a pressing member is provided on the pin member, the pin member can be instantly and reliably removed by the pressing force of the pressing member. In addition, since the weight and the support member are installed on the foundation side, there is no malfunction in a strong wind. Furthermore, since it is a mechanical type, even if a power failure occurs during an earthquake, it operates reliably.

[0011] By providing an uplift prevention device that tightly connects the structure and the foundation while permitting relative horizontal movement of the structure and the foundation during an earthquake, even if a lifting force acts on the structure in a strong wind, it resists this. And lifting of the structure is prevented.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on an embodiment shown in the drawings. This is an example applied to seismic isolation of a lightweight building. Fig. 1 shows the seismic isolation system for wind and earthquake according to the present invention.
An example is shown, and FIG. 2 shows each part thereof. FIG. 3 shows an example of an arrangement of a foundation and a device to which the present invention is applied.

In FIG. 1, a seismic isolation device 4 such as an isolator and a damper, and a mechanical windproof device 5 are disposed between a lower beam or a seismic isolation gantry 2 of a building 1 and a ground foundation 3. The device 5 includes a fixing release device 6 for fixing the building 1 to the foundation 3 and releasing the fixing, and a building 1
And a lifting prevention device 7 for preventing the lift-up of the robot.

As shown in FIGS. 1 and 2 (a), the fixing release device 6 mainly comprises a support 10 installed on a foundation 3, a bottom plate 2a of the building 1, and an upper plate of the support 10. A wind load resistance pin member 13 inserted from below into the fitting holes 11 and 12 formed in the respective 10a, a support member 14 for supporting the pin member 13 from below, and attached to an intermediate portion of the support member 14. A weight 15, a spring member 16 for pressing the pin member 13 against the support member 14, a bottom plate 2a and an upper plate 10;
The sliding member 17 is disposed between the members a.

The upper end portion 13a of the pin member 13 is formed with a taper that narrows upward, and the fitting holes 11 and 12 are formed.
Also have a tapered hole corresponding to this taper,
When the support of 4 is released, the pin member 13 is easily detached. The lower part of the support member 14 is installed on the foundation 3 by a spherical portion 18 and a spherical seat 19, so that the support member 14 can smoothly tilt in all directions about the lower part. The upper end of the support member 14 is brought into contact with the lower support surface 13c of the lower flange portion 13b of the pin member 13 to form a hemisphere, thereby reducing frictional resistance.
Is a small area. With the above-described configuration, when a seismic force exceeding a predetermined level acts, the support member 14 instantly and surely tilts in an arbitrary direction due to the inertial force of the weight 15, and the pin member 1
3 is released.

The support member 14 is, for example,
By dividing and inserting the end into the center hole of the weight 15 and fixing it with the screw 20, the vertical position of the weight 15 or the length of the support member 14 can be adjusted. When the support of the support member 14 is released, the spring member 16 inserts the pin member 13 into the fitting hole 1.
As shown in FIG. 2A, a plurality of tension coil springs are provided between the flange 13b of the pin member 13 and the mounting member 21 of the support base 10, as shown in FIG. It is arranged diagonally and uses its tensile force. Alternatively, a compression coil spring is mounted between the upper end portion 13a and the lower flange portion 13b of the pin member 13, and the compression force is used.

The sliding member 17 is a member that functions as a sliding bearing when the pin member 13 is detached during an earthquake, and is fixed on, for example, the upper plate 10a of the support base 10. The upper surface of the sliding member 17 is preferably made of a material having a small friction coefficient, such as stainless steel or a Teflon plate.

The lifting prevention device 7 is disposed by utilizing an upper plate 10a of the support base 10, and the upper plate 10
A circular loose hole 30 is provided in one of the extended portion of a and the bottom plate 2a of the building 1. The loose hole 30 is covered with a washer 31 having a diameter larger than that of the loose hole 30.
The bottom plate 2a and the upper plate 10a are tightened by the nut 32. The bolt / nut 32 and the washer 31 move horizontally during an earthquake, so that the fastening state is maintained. Also in this case, a sliding member 33 is interposed between the bottom plate 2a and the upper plate 10a so that seismic force is not transmitted to the building 1.

In the above configuration, usually,
The pin member 13 is supported by the upright support member 14,
By fitting the pin members 13 into the fitting holes 11 and 12, the building 1 and the support base 10 on the foundation are securely fixed, and the building 1 does not vibrate due to wind or the like. Further, the pin member 13 is supported from below by a support member 14 and is pressed against the support member 14 by a spring member 16.
The fixed state of the pin member 13 is not released due to a minute earthquake, vibration of a vehicle, or the like. In addition, the lifting prevention device 7 resists the lifting force in a strong wind, and prevents the building 1 from being blown up.

When a seismic force exceeding a predetermined level acts, the support member 14 falls down due to the inertial force of the weight 15, and the pin member 13 is instantly and surely detached from the fitting holes 11, 12 by the taper and the spring member 16. The fixed state of the building 1 and the support 10 is released, and the seismic isolation device 4 is operated, and the building 1 is isolated (isolator) or the vibration of the building 1 is reduced (damper). Since the weight 15 and the like are installed on the foundation, they do not malfunction in strong winds.

The seismic isolation device 4 and the windproof device 5 as described above
As shown in FIG. 3 (a), are installed on each independent foundation 40 connected by foundation beams 41, and the building is supported by the seismic isolation device 4 and the windproof device 5. Alternatively, as shown in FIG. 3 (b), a seismic isolation device 4 is provided between a seismic isolation gantry 42 and a foundation 43 having a plate rigidity composed of a frame reinforced by orthogonal members and oblique members.
And the windproof device 5 is provided.

[0022]

Since the present invention has the above-described structure, the following effects can be obtained. (1) Since the pin members are directly supported from below by the support members with weights, when an earthquake occurs, the fixing of the structure and the foundation can be instantaneously and reliably released, and during an earthquake The seismic isolation device can be activated.

(2) Since the pin member is supported by the support member from below, malfunction does not occur due to weak vibration. (3) By pressing the pin member against the support member with a pressing member such as a spring, the pin member can be instantaneously and completely released during an earthquake, and also prevents the support member from falling over due to weak vibration during normal times. be able to.

(4) The structure is relatively simple, and the cost of equipment and maintenance can be reduced. (5) By providing the lifting prevention device, it is possible to prevent a relatively lightweight structure from blowing up in a strong wind.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional front view showing an example of a seismic isolation device for wind and earthquake according to the present invention.

2A is a sectional view taken along line aa of FIG. 1, and FIG. 2B is a sectional view of FIG.
FIG.

FIG. 3 is a plan view showing an arrangement example of a foundation and a device to which the present invention is applied.

[Description of Signs] 1 ... building 2 ... lower beam of building or seismic isolation gantry 2a ... bottom plate 3 ... foundation 4 ... seismic isolation device 5 ... wind resistant device 6 ... fixed release device 7 ... floating prevention device 10 ... support base 10a ... Upper plate 11, 12 Fitting hole 13 Pin member 13a Upper tip 13b Lower flange 13c Support surface 14 Support member 15 Weight 16 Spring member 17 Sliding material 18 Ball portion 19 Spherical seat DESCRIPTION OF SYMBOLS 20 ... Screw 21 ... Mounting member 30 ... Loose hole 31 ... Washer 32 ... Bolt / Nut 33 ... Sliding material 40 ... Independent foundation 41 ... Foundation beam 42 ... Seismic isolation gantry 43 ... Foundation

Continued on the front page (72) Inventor Takanori Oya 6-2-10 Ginza, Chuo-ku, Tokyo F-term in Tomoe Corporation (reference) 3J048 AA02 AA03 AC10 BG04 DA01 EA38

Claims (3)

[Claims] 1. A seismic isolation device and a fixed release device disposed between a lower portion of a structure and a foundation, wherein the fixed release device has a fitting formed on a lower portion of the structure and an upper portion of a support on the foundation. A pin member that is vertically movably inserted into the hole, a support member that is supported on the foundation so as to be tiltable in the horizontal direction and supports the pin member from below, and a weight provided at an intermediate portion of the support member. A unique seismic isolation device for wind and earthquake. 2. The seismic isolation device according to claim 1, wherein the fixing and releasing device has a pressing member for pressing the pin member against the supporting member. 3. An uplift prevention device comprising a lower portion of a structure and an upper portion of a support base on a foundation fastened by a fastening member so as to be relatively movable in a horizontal direction relative to each other. The seismic isolation device for wind and earthquake according to claim 2.