JPH11141598A - Base isolating device and base isolating construction of lightweight structure using base isolating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base isolation device to be applied to a lightweight structure such as a dwelling house, whereby swaying or rattling caused by a wind pressure can be suppressed effectively when a strong wind pressure by a typhoon, etc., acts on the lightweight structure by linking an upper supporting plate to a lower supporting plate by an insert pin. SOLUTION: A base isolation device includes at least a lower supporting plate 2 fixed to foundation concrete C and an upper supporting plate 3 fixed to the groundsill of a structure, wherein an upper through hole 3b is vertically provided in the upper plate 3, while a lower through hole or a recess 2b is formed in the lower supporting plate 2 a mating position with the upper through hole 3b, and further the upper supporting plate 3 is furnished with an insert pin 9 to be inserted form the upper through hole 3b into the lower through hole or recess 2b and a wind swing preventive device 5 which is equipped with an elevation device 11 connected with a seismoscope 12 to detect vibrations of an earthquake and raise the insert pin 9.

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 to protect a building from vibrations caused by an earthquake, and a seismic isolation structure of a light-weight structure such as a detached house to which the seismic isolation device is attached. Things.

[0002]

2. Description of the Related Art As is well known, as a conventional seismic isolation device for protecting a building from vibrations caused by an earthquake, (1) a structure in which an upper structure is supported from below by a laminated rubber in which rubber and iron plates are alternately stacked. (2) A device that absorbs vibrations caused by an earthquake by a damper device, (3) A device that insulates the ground or a foundation from an upper structure, and the like have been proposed. For example, as the insulating method (3), a method of floating a structure by liquid or magnetism, a method of sliding the ground or foundation and an upper structure (sliding bearing), or a method of rolling a sphere such as a roll bearing is used. There are various proposals for moving the object. Further, in the conventional seismic isolation device or seismic isolation structure, the above-described device or structure of (1) and the device or structure of (2) are used in combination, or the device or structure of (1) and the device or structure of (3). A combination of the two has been proposed.

[0003]

The research and development of such seismic isolation devices or seismic isolation structures have been rapidly promoted by major construction companies in recent years, and some of them have been put into practical use. Most of them are for heavy objects such as buildings, and very few consider seismic isolation for light-weight structures such as detached houses. Therefore, when considering the seismic isolation device or the seismic isolation structure for a light-weight structure such as a detached house, the above-mentioned laminated rubber of (1) may be considered, but it is sufficient even for a light-weight structure. It is currently difficult to ensure seismic isolation performance. In view of this, it is practical to use the insulating method (3), particularly the use of a sliding bearing or a seismic isolation device in which a sphere is interposed between upper and lower bearing plates, as a seismic isolation for a light-weight structure.
However, in the case of such a sliding bearing, or in the case of seismic isolation by interposing a sphere between the upper and lower bearing plates, the lower bearing plate fixed to the foundation concrete fixes the upper bearing fixed to the base constituting the lightweight structure. It is supported via a plate, or it is supported with a sphere interposed between the lower support plate and the upper support plate, so if strong wind pressure such as typhoon acts on the structure The whole structure may shake due to the wind pressure. In particular, as the height from the ground is higher, as in a three-story structure, there is a high possibility that such wind-induced shaking will occur. In order to prevent such swaying due to wind pressure, it is conceivable to connect the lower support plate and the upper support plate. However, if such a connection is made, on the other hand, the seismic isolation effect due to the occurrence of an earthquake will be reduced. Can not expect. In addition, even in the case of the above-described (1) laminated rubber, the swing due to the wind pressure may occur depending on the material and structure of the laminated rubber.

Accordingly, the present invention has been proposed to solve the problems of the above-described conventional seismic isolation device and the seismic isolation structure to which the conventional seismic isolation device is attached. A seismic isolation device and a seismic isolation device that can effectively prevent the occurrence of shaking even when strong wind pressure due to a typhoon or the like acts on the structure, It is intended to provide an attached seismic isolation structure.

[0005]

Means for Solving the Problems The present invention has been proposed to achieve the above object, and the first invention (the invention described in claim 1) relates to a seismic isolation device. A lower support plate fixed to the foundation concrete, and an upper support plate fixed to the base of the structure, wherein the upper support plate has an upper through hole formed in a vertical direction, The plate has a lower through hole or a recess formed at a position corresponding to the upper through hole,
On the upper support plate, an insertion pin that is inserted from the upper through hole into the lower through hole or the concave portion, and an elevation drive that is connected to a seismic sensor that detects vibration due to an earthquake and raises the insertion pin. And a wind sway prevention device having the device.

Further, the second invention (the invention according to claim 2)
The present invention relates to a seismic isolation structure for a light-weight structure, wherein the seismic isolation device according to the first invention is attached.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a seismic isolation device according to the present invention and a seismic isolation structure of a light-weight structure to which the seismic isolation device is attached will be described in detail with reference to the drawings.

As shown in FIG. 1, the seismic isolation device 1 is disposed between a lower support plate 2, an upper support plate 3, and an upper surface of the lower support plate 2 and a lower surface of the upper support plate 3. 2 and 3 and a wind sway prevention device 5 attached to the upper surface of the upper support plate 3.

The lower bearing plate 2 is made of a foundation concrete C
Are fixed to the upper surface of the base plate 6 by a not-shown anchor bolt and are fixed to the upper surface of a base plate 6 formed of iron as a substantially square plate body through a not-shown bolt. The lower support plate 2 is connected to the base plate 6.
In the same manner as described above, it is formed of iron as a substantially square plate, and has a concave portion 2a on the upper surface (FIGS. 2 and 3).
Reference) is formed. Also, the upper support plate 3
The lower support plate 2 has the same configuration as that of the lower support plate 2, and a concave portion 3 a is also formed on the lower surface of the upper support plate 3.
And, between the lower support plate 2 and the upper support plate 3,
A sphere 4 is provided as shown in FIGS. The diameter of the sphere 4 is longer than the distance from the lowest part of the recess 2 a formed in the lower support plate 2 to the highest part of the recess 3 a formed in the upper support plate 3. .

As shown in FIG. 1, a large number of screw holes 3a are formed on the upper surface of the upper support plate 3.
The connecting hardware 8 is fixed on the upper support plate 3 by fixing bolts 7 screwed into the screw holes 3a. The connecting hardware 8 includes a lower plate portion 8a whose lower surface is in contact with the upper surface of the upper support plate 3, an upper plate portion 8b facing the lower plate portion 8a, and a lower plate portion 8a. An upper plate portion 8b and an upright portion 8c connected at both upper and lower ends are formed. On the upper surface of the upper plate portion 8b, a base (not shown) constituting a lightweight structure framed by wood (not shown) is provided with bolts. It is fixed by. That is, the lower support plate 2 constituting the present invention is fixed to the foundation concrete C via the base plate 6, and the upper support plate 3 is fixed to the base constituting the structure via the connecting hardware 8, In the embodiment, a sphere 4 is provided between the lower support plate 2 and the upper support plate 3. Therefore, when an earthquake occurs, the vibration is insulated between the lower support plate 2 and the upper support plate 3,
The acceleration of the upper bearing plate 3 can be extremely small.

In the present embodiment, as shown in FIG. 1, a wind sway prevention device according to the present invention is provided on the upper surface of the upper support plate 3 and near the corners of the upper support plate 3. As shown in FIG. 2, a through hole 3b is formed in the upper support plate 3 in a vertical direction, and the lower support plate 2 is provided below the through hole 3b. A recess 2b is formed vertically from the upper surface of the lower support plate 2. The through holes 3b and the recesses 2b correspond to the shapes of the insertion pins, which are components of the wind sway prevention device 4 described later. In addition, the said through-hole 3b is an upper side through-hole which comprises this invention.

As shown in FIG. 1, the wind sway preventing device 4 includes an insertion pin 9, an elevating member 10 having the upper end of the insertion pin 9 fixed to the tip, and an elevating member 10
A drive unit 11 (solenoid) for driving the actuator up and down, and a seismic sensor 12 connected to the drive unit 11. In the present embodiment, the insertion pin 9 is formed in a columnar shape, and has an outer diameter formed in a through hole 3 b formed in the upper support plate 3 and in the lower support plate 2. It is slightly shorter than the inner diameter of the recess 2b. The elevating unit 10 is positioned in the horizontal direction.
The upper end is fixed. The driving unit 11 drives the lifting unit 10 to move vertically.
When the vibration caused by the earthquake is detected by the seismic device 12, the insertion pin 9 which has been lowered until then is raised. The seismic device 12 connected to the driving unit 11 outputs a signal to the driving unit 11 when an arbitrarily set shaking of the seismic intensity is detected.

According to the seismic isolation device 1 provided with the wind sway prevention device 5 having the above-described configuration, when a seismic intensity of a preset earthquake is detected by the seismic sensor 12, the detection signal is transmitted to the drive unit 11. The drive unit 11 is driven by this, and the elevating unit 10 and the insertion pin 9 are raised. Therefore, as shown in FIG. 2, the insertion pin 9 that has been inserted from the through hole 3 b into the recess 2 b until then, as shown in FIG. Pulled out of That is, as shown in FIG.
When the insertion pin 9 is inserted from the through hole 3b into the recess 2b, a strong wind pressure such as a typhoon acts on a light-weight structure such as a detached house to which the seismic isolation device 1 is attached. Even so, since the upper support plate 3 is connected via the insertion pins 9, it is possible to effectively prevent shaking and rattling. In the state shown in FIG. 2, when an earthquake having a predetermined seismic intensity occurs, the insertion pin 9 is raised, whereby the connection state between the upper support plate 3 and the lower support plate 2 is released. As a result, the vibration of the earthquake does not propagate to the upper support plate 3, and the entire lightweight structure is protected from the vibration.

Although the insertion pin 9 according to the embodiment of the present invention described above is illustrated and described as having a cylindrical shape, the insertion pin constituting the present invention is not necessarily a circular pin. Not only those formed in a columnar shape but also those formed in an inverted conical shape, and when the insertion pin is formed in such an inverted conical shape, the upper support plate and the lower support plate The through hole or the concave portion formed at the bottom may have an inner peripheral shape whose diameter is gradually reduced from the upper end side to the lower end side so that at least the insertion pin is inserted or inserted.

[0015]

As is clear from the above description of the seismic isolation device according to one embodiment of the present invention and the seismic isolation structure of a light-weight structure using the seismic isolation device, according to the present invention, When strong wind pressure such as a typhoon acts on a light-weight structure such as a detached house, the upper support plate and the lower support plate are connected by the insertion pins, so that shaking and rattling due to the wind pressure are effective. Can be suppressed. On the other hand, when an earthquake occurs and vibration occurs, the connection between the upper and lower support plates by the insertion pins is released by the drive of the lifting / lowering drive device that is driven through the seismic sensor. The seismic isolation effect can be exhibited without any problems.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a seismic isolation structure of a light weight structure according to one embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state in which an upper support plate and a lower support plate are connected by insertion pins constituting the wind sway prevention device shown in FIG. 1;

FIG. 3 is a sectional view showing a state in which a connection state between an upper support plate and a lower support plate by an insertion pin constituting the wind sway prevention device shown in FIG. 1 is released.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seismic isolation device 2 Lower support plate 2b Recess 3 Upper support plate 3b Through hole 5 Wind sway prevention device 9 Insertion pin 11 Drive unit 12 Seismic sensor C Foundation concrete

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[Procedure amendment]

[Submission date] January 12, 1998

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

[Fig. 1]

FIG. 2

[Fig. 3]

Claims (2)

[Claims] At least a lower support plate fixed to a foundation concrete and an upper support plate fixed to a foundation of a structure, wherein the upper support plate has an upper through hole formed in a vertical direction. ,
The lower support plate has a lower through-hole or recess formed at a position corresponding to the upper through-hole, and is inserted into the upper support plate from the upper through-hole into the lower through-hole or recess. A wind sway prevention device, comprising: a penetrating pin that is connected to a seismic sensor that detects vibration caused by an earthquake; and an elevating drive device that raises the penetrating pin. Seismic isolation device. 2. A seismic isolation structure for a light-weight structure to which the seismic isolation device according to claim 1 is attached.