JPH11287291A - Base isolation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an appearance better than ever without entailing a drop in a base isolation performance. SOLUTION: This base isolation device is composed of interposing a base isolating member in a space lying between two vertical plates 1. A side plate 7 is rotatively on-off operably supported on an edge part of the upper plate 1 with a torsion coil springed hinge 6 elastically energizing this plate, while a catching member 8 maintaining a closed state of the side plate 7 against any resilient pressure in a torsion coil spring is installed in space between the other plate and the side plate 7, and a catching force of this catching member 8 should be set so as not to be resistible to the resilient pressure of the torsion coil spring by the addition of stress in base isolating operations of the base isolating member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to a technical field related to a laminated type seismic isolation device having a seismic isolation member interposed between upper and lower plates.

[0002]

2. Description of the Related Art Conventionally, as a seismic isolation device, for example, one described in Japanese Patent Application Laid-Open No. 10-2375 is known.

[0003] This conventional seismic isolation device is of a multi-layer type in which two types of seismic isolation members are interposed between upper and lower and intermediate plates, respectively.

[0004]

In the above-described conventional seismic isolation device, if the seismic isolation member is to be used as an exhibition stand for exhibiting works of art or the like, the seismic isolation member is visible from the side, so that the appearance of the seismic isolation device is reduced. Is defective.

In order to solve such a problem, it is conceivable to cover the side surface with a cover material or the like. However, the presence of the cover material hindered the seismic isolation device's seismic isolation operation,
There is a new problem that the seismic isolation performance of the seismic isolation device is reduced.

SUMMARY OF THE INVENTION The present invention has been made in consideration of such problems, and it is an object of the present invention to provide a seismic isolation device having a good external appearance without deteriorating seismic isolation performance.

[0007]

Means for Solving the Problems In order to solve the above-mentioned problems, the seismic isolation device according to the present invention employs the following means.

That is, according to the first aspect of the present invention, in the seismic isolation device in which the seismic isolation member is interposed between the upper and lower plates, the side plate is supported on the edge of one of the plates so as to be rotatable and openable. A catch for providing a resilient member for urging the side plate in the opening direction between the plate and the side plate, and maintaining the closed state of the side plate between the other plate and the side plate against the resilient pressure of the resilient member. A member is provided, and the catching force of the catch member is set so as not to be able to withstand the resilience of the resilient member by adding the stress of the seismic isolation member.

[0009] In this means, the side surface is covered with the side plate, and the seismic isolation member cannot be visually recognized. The side plate is released when the stress of the seismic isolation operation of the seismic isolation member is applied, so that the side plate does not become an obstacle to the seismic isolation operation.

[0010] According to a second aspect of the present invention, in the seismic isolation device of the first aspect, the side plate is supported by the upper plate, and the lower end surface thereof abuts on the installation surface in a closed state.

According to this means, when the side plate is closed, the side plate protrudes between the plate and the installation surface.

According to a third aspect of the present invention, in the seismic isolation device of the first or second aspect, the one plate and the side plate are connected by a hinge having a torsion coil spring serving as a resilient member.

In this means, one plate and the side plate are connected and supported by one member.

According to a fourth aspect of the present invention, in the seismic isolation device according to any one of the first to third aspects, the catch member utilizes an attractive force of a magnet.

In this means, a catch member having no uneven structure is selected.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a seismic isolation device according to the present invention will be described below with reference to the drawings.

1 to 3 show an embodiment (1) of a seismic isolation device according to the present invention.

In this embodiment, the above-described seismic isolation mechanism of the conventional example is employed as it is.

That is, this seismic isolation mechanism comprises an upper plate 1 on the upper side, an intermediate plate 2 in the middle, a lower plate on the lower side 3, a vertical vibration isolator 4 as a seismic isolation member, and a horizontal vibration isolator 5 It consists of a multi-layer type by each part.

The upper plate 1, the intermediate plate 2, and the lower plate 3 are made of a rectangular plate having substantially the same thickness.

The vertical vibration isolator 4 interposed between the upper plate 1 and the intermediate plate 2 attenuates mainly vertical vibrations, and is fixed to the upper plate 1 and protrudes toward the intermediate plate 2. An inner cylinder 41; an outer cylinder 42 fixed to the intermediate plate 2 and protruding toward the upper plate 1;
1, a viscoelastic material 43 fixed between the outer cylinders 42.

The horizontal vibration isolator 5 interposed between the intermediate plate 2 and the lower plate 3 mainly attenuates vibration in the horizontal direction, and has a convex spherical contactor 51 fixed to the intermediate plate 2. And a concave spherical seat 52 fixed to the lower plate 3.

The vertical vibration isolator 4 and the horizontal vibration isolator 5 are provided in a plural number so that the upper plate 1, the intermediate plate 2 and the lower plate 3 are centered at their proper positions and converge. I have.

On the edge of the upper plate 1, a side plate 7 is supported by a hinge 6 with a torsion coil spring so as to be rotatable and openable.

The side plate 7 is made of a rectangular plate having substantially the same thickness as the upper plate 1, the intermediate plate 2, and the lower plate 3, and is set to a size such that the lower end surface 71 contacts the installation surface F in a closed state. ing. This side plate 7
The hinge 6 (torsion coil spring) urges the opening in the opening direction.

At the edge of the lower plate 3, a magnet 81 constituting a part of the catch member 8 is fixed.
In addition, near the lower end surface 71 of the inner side surface 72 of the side plate 7, a suction piece 82 constituting the remaining part of the catch member 8 is provided.
Has been fixed. The catching force of the catch member 8 causes the side plate 7 to be attracted and closed against the elastic pressure of the hinge 6 (torsion coil spring). However, the seismic isolation stress from the vertical vibration isolator 4 and the horizontal vibration isolator 5 is applied. In this case, the setting is such that the side plate 7 is opened. Since the catch member 8 can exert a catching force on a flat surface, the catch member 8 can be attached without performing a complicated uneven structure.

According to this embodiment, the side surface is covered with the side plate 7 and the vertical vibration isolator 4 and the horizontal vibration isolator 5 are concealed, so that the appearance is improved. Therefore, there is no inconvenience even if the exhibit G is put on the upper plate 1 for display.

In the closed state of the side plate 7,
Since the side plate 7 protrudes between the upper plate 1 and the installation surface F to lock the seismic isolation, the display G is placed on the upper plate 1 when the rearrangement, cleaning, inspection, etc. are performed. The product G can be in a stable state.

In addition, in the event of an earthquake or the like, if the catching force of the catch member 8 exceeds the limit of the catching force due to the additional seismic isolation stress, the side plate 7 is lifted up by the elastic pressure of the hinge 6 (torsion coil spring) and opened. Will be done. In the open state of the side plate 6, there is no obstacle to the seismic isolation operation, so that the seismic isolation performance does not decrease.

FIGS. 4 and 5 show an embodiment (2) of the seismic isolation device according to the present invention.

In this embodiment, the upper plate 1 side,
The configuration of the lower plate 3 with respect to the side plate 7 is reversed from that of the above-described embodiment (1).

According to this embodiment, the opened side plate 7 comes into contact with the installation surface F, thereby lowering the center of gravity as a whole and increasing the stability.

As described above, in addition to the illustrated embodiment, it is also possible to set the size such that the lower end surface 71 of the side plate 7 of the above-described embodiment (1) does not contact the installation surface F. According to this embodiment, the lower end surface 71 of the side plate 7 is mounted on the installation surface F.
, The opening of the side plate 7 becomes smooth.

Further, the catch member 8 can be provided with a locking structure.

Further, it is possible to provide a resilient member for biasing the side plate 7 in the opening direction separately from the hinge 6.

[0036]

As described above, in the seismic isolation device according to the present invention, the side plate is covered with the side plate so that the seismic isolation member is not visible, and the side plate covering the side surface is used for the seismic isolation operation of the seismic isolation member. When the stress is applied, the seismic isolation operation is released and does not become an obstacle to the seismic isolation operation. Therefore, there is an effect that the appearance can be improved without deteriorating the seismic isolation performance.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment (1) of a seismic isolation device according to the present invention.

FIG. 2 is an enlarged vertical sectional view of FIG.

FIG. 3 is a side view showing an operation state from FIG. 1;

FIG. 4 is a longitudinal sectional view showing an embodiment (2) of the seismic isolation device according to the present invention.

FIG. 5 is a side view showing the operation state from FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper plate 2 Intermediate plate 3 Lower plate 4 Vertical anti-vibration part (seismic isolation member) 5 Horizontal anti-vibration part (seismic isolation member) 6 Hinge 7 Side plate 8 Catch member

Claims (4)

[Claims] In a seismic isolation device having a seismic isolation member interposed between upper and lower plates, a side plate is rotatably supported on an edge of one of the plates, and the one plate and the side plate are connected to each other. Between the other plate and the side plate, a catch member is provided between the other plate and the side plate to maintain the closed state of the side plate against the resilience of the resilient member. A seismic isolation device characterized in that the catching force of the member is set so that it cannot withstand the repression of the resilient member by adding the stress of the seismic isolation operation of the seismic isolation member. 2. The seismic isolation device according to claim 1, wherein the side plate is supported by an upper plate, and a lower end surface thereof abuts on an installation surface in a closed state. 3. The seismic isolation device according to claim 1, wherein
A seismic isolation device wherein one of the plates and the side plate are connected by a hinge having a torsion coil spring as an elastic member. 4. The seismic isolation device according to claim 1, wherein the catch member utilizes an attraction force of a magnet.