JP2001227196A - Vibration isolation apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive vibration isolation apparatus. SOLUTION: A base member 1 is horizontally fixed onto a foundation of a building. An upper member 3 is fixed onto a lower surface of an upper structure of the building. Then, a slide block 2 is mounted on the base member 1, and the upper member 3 is mounted on the slide block 2. When an earthquake strikes, the slide block 2 slides on a block receptacle piece 11, to thereby absorb one-way vibration of the base member 1. Further, the upper member 3 on the slide block 2 slides, to thereby absorb vibration in a direction that intersects to the one-way vibration. Then, gently V-shaped slopes 10c, 10c are formed on a fixed base 10, and the block receptacle pieces 11 are serially arranged thereon, to thereby form a gentle V shape on an upper surface of the base member 1. As a result, the base member 1 exhibits a damping function. Therefore, the block receptacle pieces 11 are each formed into a semi-columnar shape, to thereby obtain the vibration isolation apparatus which is easily produced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a seismic isolation device for a building.

[0002]

2. Description of the Related Art In recent years, seismic isolation devices have been known in which a superstructure can be swung with respect to a foundation of a building in order to protect the building from damage caused by an earthquake. Of these seismic isolation devices, Japanese Patent Application Laid-Open No. 11-230254 discloses a device using a slip bearing. In this conventional technique, side walls along both sides of a band-shaped base member are integrally provided, a concave strip is formed on an upper surface, a slide piece is accommodated in the concave strip, and one direction along the concave strip is accommodated. The slide piece is sliding. On this slide piece, an upper member made of the same member as the base member is fixed to the lower surface of the upper structure of the building in a direction crossing the base member horizontally. In the event of an earthquake, the upper structure of the building swings back and forth and left and right to absorb the shaking of the earthquake. In addition, the upper surface of the base member is formed to have a gentle concave curved surface in the longitudinal direction to provide a damping function and a restoring function when the slide piece swings.

[0003]

However, Japanese Patent Application Laid-Open No.
In the seismic isolation device described in 230254, since the base member and the upper member have a concave cross section and are integrally formed on a concave curved surface that is loose in the longitudinal direction, complicated processing is required.
There is a problem that manufacturing is not easy. Thus, an object of the present invention is to provide a seismic isolation device that can be manufactured more easily.

[0004]

According to the first aspect of the present invention, the base member has a base fixing piece and a convexly curved cross section.
The slide piece is composed of a piece receiving piece whose upper surface in the longitudinal direction is fixed to a base fixing piece in a loose V-shape. A concave streak is formed, and an upper slide concave streak having a concave cross section in a direction intersecting the lower slide concave streak is formed on an upper surface thereof, and the upper member includes an upper fixing piece and an upper slide concave streak. And a piece-mounting piece fixed to an upper fixing piece in a loose V-shape in the longitudinal direction so as to be slidable along the section.

In this seismic isolation device, a base member is fixed horizontally on a foundation of a building, while an upper member is fixed to a lower surface of a superstructure of the building. The slide piece is slidably mounted on a V-shaped piece receiving piece loose in the longitudinal direction of the base member. Further, an upper member is slidably mounted on the slide piece. When an earthquake strikes, the slide piece slides on the lower slide piece to absorb the one-way swing of the base member. The upper member on the slide piece slides and absorbs the swing in the direction intersecting with this. Also,
Since the upper surface of the piece receiving piece has a gentle V-shape, the swing is attenuated.

According to the second aspect of the present invention, the base member and the upper member have the same configuration, and the number of types of parts can be reduced. According to the third aspect of the present invention, a loose V-shaped inclined surface is formed on the fixed base, and the two semi-cylindrical lower guide pieces that are easy to manufacture are fixed in series to form a loose V-shaped member in the longitudinal direction. It is shaped like a letter.

[0007]

According to the first aspect of the present invention, the base member includes a base fixing piece, and a piece receiving piece fixed to the base fixing piece in a V-shape having a cross-sectional shape of a convex curved surface and a gentle upper surface in the longitudinal direction. In addition, the slide piece has a lower slide concave portion having a lower surface slidable on the base member so that the cross section is a concave curved surface, and the upper surface has a cross section in a direction intersecting the lower slide concave line. Is formed as a concave curved surface, and the upper member has an upper fixing piece and a convex curved surface in cross section slidable along the upper slide concave ridge, and a loose V-shaped upper surface in the longitudinal direction. Since it is composed of a piece-mounting piece fixed to an upper fixing piece in the shape of a circle, the structure is simple and a seismic isolation device having a damping function can be obtained.

According to the second aspect of the present invention, the base member and the upper member have the same configuration, so that the number of types of components can be reduced, and the seismic isolation device can be manufactured easily.
According to the third aspect of the present invention, a loose V-shaped inclined surface is formed on the fixed base, and two semi-cylindrical lower guide pieces are fixed to each inclined surface in series, and are loose in the longitudinal direction. Since they are arranged in a V-shape, the lower guide pieces can be made into a semi-cylindrical shape that can be easily manufactured, and the seismic isolation device can be easily manufactured.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described in detail. FIG. 1 shows a state in which the seismic isolation device of this embodiment is attached to a building.
The base member 1 is fixed horizontally on the top. A slide piece 2 is slidably mounted on the base member 1 in the left and right longitudinal directions in FIG. Further, an upper member 3 is provided on the slide piece 2 so as to be slidable in a direction intersecting with the base member 1 (a direction orthogonal to the plane of FIG. 1). The upper member 3 is horizontally fixed to the lower surface of the upper structure U of the building. This allows
The upper structure U of the building is slidably disposed in front, back, left, and right with respect to the foundation B of the building.

As shown in FIG. 2, the base member 1 comprises a substantially rectangular base fixing piece 10 and a piece receiving piece 11 fixed to the base fixing piece 10. Base fixing piece 10
Are provided with mounting holes 10a at the four corners, and
Can be fixed by screws (not shown).

An attachment strip 10 for attaching a piece receiving piece 11 in the longitudinal direction from the center of the base fixing piece 10 to the left and right.
b is formed one step higher. This mounting strip 10b is
Inclined surfaces 10c whose center is low and whose left and right ends are raised and whose inclination is 3 ° are provided on the left and right, respectively, are formed in a V-shape as a whole, and guide walls 10d are provided on both sides of these inclined surfaces 10c. Are integrally formed. Also, base fixing piece 1
The mounting hole 10e penetrating from the lower surface of the inclined surface 10c
Are formed in a direction perpendicular to the direction.

The piece receiving piece 11 is formed in a flat surface so that the lower surface thereof can be attached to the inclined surface 10c so as to be attached thereto, the upper surface is coated with Teflon having a small coefficient of friction, the cross section is an arc surface, and has the same diameter in the longitudinal direction. Is formed. A screw hole 12 is formed at a position corresponding to the mounting hole 10e (see FIG. 4), and is mounted on the left and right inclined surfaces 10c by lower base mounting screws 13, 13, respectively. For this reason, the piece receiving piece 11 fixed to the base fixing piece 10 is disposed in the longitudinal direction, in this example, in a loose V-shape of 3 °. The stopper 14 is fixed to the left and right ends of the V-shaped piece receiving piece 11 by stopper mounting screws 14a, and the moving interval of the slide piece 2 slidably mounted on the piece receiving piece 11 is determined. Can be

As shown in FIG. 2, the slide piece 2 is formed with a lower slide recess 20 having a concave curved surface composed of a semicircular arc slightly larger than the piece receiving piece 11, and straddles the piece receiving piece 11. It is slidable. This lower slide groove 20 is formed of Teflon having a small coefficient of friction,
It is slidable even for relatively small earthquakes. Also, on the upper surface of the slide piece 2,
Is formed in the direction perpendicular to the lower slide groove 20 at right angles to the Teflon upper slide groove 21 made of the same member as the member constituting the above.

In this embodiment, the upper member 3 fixed to the lower surface of the upper structure U of the building uses the same member as the base member 1 and is turned upside down with the piece receiving piece 11 It is arranged in the direction which intersects at right angles with. That is, the base member 1 includes the upper fixing piece 30 and the piece mounting piece 31 fixed to the upper fixing piece 30.
The piece mounting piece 31 has a cross-sectional shape that is a convex curved surface corresponding to the upper slide concave streak 21 and has a gentle V in its longitudinal direction.
It is arranged in a letter shape. Mounting holes 30a are formed at four corners of the upper fixing piece 30, and are fixed to the upper structure U of the building with screws (not shown).

At the center of the upper fixing piece 30, there are formed left and right mounting strips 30b for mounting the piece mounting piece 31 in the longitudinal direction. The attachment strip 30b has a gradient of 3 °.
The center is low and the left and right ends are high inclined surfaces 30c. Further, a mounting hole 30e is formed in a direction orthogonal to the inclined surface 30c. And the inclined surface 30c
A guide wall 30d is integrally formed on both sides of the
Mounting is easy.

The piece mounting piece 31 is formed in a flat surface so that the lower surface can be closely attached to the inclined surface 30c, the upper surface is a circular arc surface in cross section coated with a small coefficient of friction Teflon, and is formed to have the same diameter in the longitudinal direction. ing. Screw holes 31a are formed at positions corresponding to the mounting holes 30e, and the upper base mounting screws 33, 33 are formed on the left and right inclined surfaces 30c, respectively.
It is attached by. Thereby, the upper fixing piece 30
Are arranged in series in the longitudinal direction, and in this example, are arranged in a gentle V-shape of 3 °.

Next, the operation of the above-described embodiment of the present invention will be described. The mounting is fixed to the foundation B of the building with screws (not shown) in the mounting holes 10a. In this way, the base member 1 is fixed to a plurality of locations on the foundation B of the building. Next, the lower slide recess 20 of the slide piece 2 is placed on the piece receiving piece 11, and the slide piece 2 is disposed so as to be slidable in the longitudinal direction of the piece receiving piece 11. At this time, since the piece receiving pieces 11 are arranged in a V-shape, the slide piece 2 is arranged at the center thereof.

On the other hand, the upper member 3 is attached and fixed to the upper structure U of the building with the same member as the base member 1 upside down and in a direction intersecting at right angles to the piece receiving piece 11 with a screw (not shown). Then, the piece mounting piece 31 of the upper member 3 is placed in the upper slide groove 21 of the slide piece 2, and the upper member 3 is slidably disposed in a direction orthogonal to the lower slide groove 20. Thus, the seismic isolation device of this embodiment is mounted.

Here, when the foundation B of the building swings due to an earthquake or the like, the base member 1 fixed to the foundation B swings. The swing of the piece receiving piece 11 in the longitudinal direction is absorbed by the slide piece 2 sliding in this direction. In addition,
Since the stoppers 14 are provided at both ends of the piece receiving piece 11, the slide piece 2 slides within this range. The swing of the piece receiving piece 11 in the direction orthogonal to the longitudinal direction is absorbed by the upper member 3 sliding on the slide piece 2.

As described above, the slide piece 2 is placed on the base member 1.
The upper member 3 relatively swings in one direction and on the slide piece 2 in a direction perpendicular to the same, whereby the shaking is absorbed and the building is protected from the shaking of the earthquake. At this time, the piece receiving pieces 11 are arranged in a loose V-shape.
Since the piece mounting pieces 31 are also arranged in the same manner, their swings are attenuated. At the same time, the slide piece 2 is returned to the center of the piece receiving piece 11 and the upper member 3 is returned to the center position of the slide piece 2 to be restored.

In the embodiment, the same member is used for the base member 1 and the upper member 3 and the Teflon members serving as the upper and lower surfaces of the slide piece 2 are commonly used.
The components to be manufactured can be shared, and an inexpensive seismic isolation device can be obtained.

Further, since the piece receiving piece 11 and the piece placing piece 31 are formed in a semi-cylindrical shape and arranged in series, the base member 1 and the upper member as shown in the prior art are formed. 3 can be manufactured at low cost without requiring complicated processing, and can be a cheap seismic isolation device.

The embodiment has been described above.
The present invention is not limited to this embodiment, but can be implemented as exemplified below. (1) In the embodiment, the example in which the same member is used for the base member 1 and the upper member 3 has been described, but it is not always necessary to use a common member.

(2) In the embodiment, an example is shown in which the inclined surface 10c of the piece receiving piece 11 is arranged in a gentle V-shape of 3 °.
It is not always necessary to set the angle to 3 °, and the attenuation function and the restoration function can be adjusted by appropriately changing the angle to about 1 to 5 °.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an installation state.

FIG. 2 is an exploded perspective view.

FIG. 3 is a sectional view

FIG. 4 is a cross-sectional view in a direction orthogonal to FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Base member 2 ... Slide piece 3 ... Upper member 10 ... Base fixing piece 10c ... Inclined surface 11 ... Piece receiving piece 20 ... Lower slide concave strip 21 ... Upper slide concave strip 30 ... Upper fixed piece 30c ... Inclined plane 31 ... Piece Mounting piece

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Takayuki Shibayama 2 Sanage-cho, Kita-ku, Nagoya F-term (reference) in Daido Metal Industry Co., Ltd. 3J048 AA04 AB01 AC01 BG04 DA03 EA38

Claims (3)

[Claims] 1. A base member horizontally fixed on a foundation of a building, a slide piece sliding horizontally in one direction on the base member, and a slide piece fixed on a lower surface of an upper structure of the building, and In the seismic isolation device including an upper member that slides in a direction intersecting with the base member, the base member has a base fixing piece, a cross-sectional shape that is a convex curved surface, and an upper surface in a longitudinal direction having a gentle V-shape. The slide piece has a lower slide recess having a concave section so that its lower surface is slidable on the base member. An upper slide recess having a concave cross section in a direction intersecting with the lower slide recess is formed on the upper member, and the upper member has an upper fixing piece and a cross section slidable along the upper slide recess. Convex shape A seismic isolation device characterized in that the seismic isolation device comprises: a piece mounting piece fixed to the upper fixing piece in a V-shape having a loose upper surface in the longitudinal direction. 2. The seismic isolation device according to claim 1, wherein the base member and the upper member have the same configuration. 3. A loose V-shaped inclined surface is formed on the fixed base, and two semi-cylindrical lower guide pieces are fixed in series to each of the inclined surfaces to form a loose V-shaped member in the longitudinal direction. The seismic isolation device according to claim 1, wherein the seismic isolation device is arranged in a character shape.