JPH10213179A - Base-isolated support structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cope with and absorb the vibration due to earthquake in the whole horizontal direction and vertical and oblique directions to achieve good base-isolation and protect a load object which is installed from the vibration due to earthquake by providing a spherical body on a support member, a bolt which is inserted, and in a lower end part of the bolt to bring it into contact with the support member and an opening fringe of the spherical body. SOLUTION: A through hole 2 in the vertical direction is provided in a pedestal part 1, and a spherical face part of a support member 3 which is like a semi-spherical body and is made of metal is put on a tapered face 2a of the through hole 2. Moreover, a bolt 7 is inserted into the center of the support member 3, a lower end thereof is inserted into a support frame body 11, and a spherical body 14 is attached to them. Moreover, a coil spring 17 is provided in a bottom part of the support frame body 11, and a rubber base-isolation material 18 is provided between the support frame body 11 and the pedestal part 1. When the vibration due to earthquake in the vertical direction is applied, the vibration is absorbed due to the shrinkage action of a springing material 5, the coil spring 17, the base-isolation material 18, etc., to reduce its effect on the pedestal part 1. Consequently, it is possible to cope with the vibration due to earthquake in each direction efficiently and prevent the destruction of a load object.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base-isolated bearing structure, in particular, not only to buildings and structures, but also to various types of loads, which are fixed or fixed, in addition to earthquakes, mechanical vibrations, strong winds, etc. The present invention relates to a seismic isolation bearing structure that protects against vibrations and enables absorption and reduction regardless of the direction of the vibrations.

[0002]

BACKGROUND OF THE INVENTION At present, as a countermeasure against earthquakes, an anti-vibration mechanism and a seismic isolation mechanism are often incorporated into buildings and structures. This conventional anti-vibration and seismic isolation mechanism has a structure that resists vibration and a type that absorbs vibration by reinforcing the load itself, including the foundation, but in the case of a structure that resists vibration, A large stress load causes breakage, collapse, etc., depending on the directionality of the reinforcement. In addition, most of the structures that absorb vibrations are for horizontal one-way vibrations, and cannot absorb vertical vibrations or vibrations in a direction crossing the assumed direction.

[0003]

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above-mentioned conventional technology and problems, and it has been proposed to solve such problems and to provide a 360-degree horizontal, vertical and diagonal vibration. It is an object of the present invention to provide a seismic isolation bearing structure that absorbs the above and absorbs the seismic power better, and protects the installed load from vibration.

[0004]

In order to achieve this object, in a seismic isolation bearing structure according to the present invention, a vertical through hole is provided in a pedestal portion, and at least a lower surface is arcuately formed at an upper opening edge of the through hole. A support member having a flat surface is fitted and placed, and a screw engraved portion is projected upward at the center of the support member to insert a bolt, and a sphere is provided at a lower end portion of the bolt, and the sphere is provided with a support frame. Abuts the lower opening edge of the through-hole formed on the upper surface of the body, and is received and arranged below at the receiving seat with a resilient material interposed therebetween, at least through the resilient material at the upper part of the support member, It is characterized in that it is fastened with a nut to the screw engraved portion of the bolt, and the seismic isolation material is interposed in a state where the bolt is penetrated between the pedestal portion and the support frame body, An interposed member having a flange on the lower end It is characterized in that with installed, are then resiliently connected by the elastic member between the cover member attached to the flange and the base portion of the intermediate member.

[0005]

With the above construction, the horizontal vibration is 360 degrees due to the contact between the support member, the bolt inserted therethrough and the sphere at the lower end of the bolt and the opening edge of the support member and the sphere. Can be absorbed over
In addition, vertical vibrations, which also take into account diagonal directions, can be absorbed by the interposition of resilient materials, and the impact on the installed load can be extremely small.
Accidents such as damage can be prevented beforehand. Moreover,
This seismic isolation bearing structure can be used for relatively small loads depending on the installation scale, and is not limited to buildings and structures. For example, lighting poles, vending machines, telephone boxes, sculptures, display shelves, etc. Can also be targeted.

[0006]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing a first embodiment of the present invention, FIG. 2 is a perspective view of a main part when the same is used for a support column, FIG.
FIG. 7 is a diagram showing a case where the display device is used for a display shelf.

First, a first embodiment will be described with reference to FIGS. 1 and 2. In FIGS. 1 and 2, reference numeral 1 denotes a pedestal formed of, for example, concrete or the like. The receiving portion 1a for receiving the load is integrally erected.

The pedestal portion 1 is provided with a through hole 2 in a vertical direction, and a tapered surface 2a having a round shape is formed on the inner peripheral surface near the upper opening of the through hole 2. .

In the present embodiment, reference numeral 3 denotes a metal support member formed in a hemispherical shape in the present embodiment, and the support member 3 has a spherical portion formed on the tapered surface 2 of the through hole 2 described above.
a. The support member 3
Is larger than the through hole 2,
Will not pass through.

A recess 4 is formed on the upper surface of the support member 3, and a resilient material 5 made of rubber in this embodiment is fitted in the recess 4. The upper part protrudes from the support member 3. The upper and lower sides of the resilient material 5 are integrally provided with fixing metal plates 5a and 5a. Further, a tapered hole 6 having a frusto-conical shape and opened to the through hole 2 is formed at the bottom of the support member 3 so as to communicate with the recess 4.

A resilient material 5 fitted to the support member 3 described above.
The screw engraved portion 7 a of the bolt 7 is inserted into the center of the bolt 7 and protrudes above the resilient material 5. And the screw engraving part 7
A nut 9 is tightened to a through a washer 8.

On the other hand, in the first embodiment, the support frame 11 is provided on the upper surface of the foundation 10, and the flange 11a provided on the side surface of the support frame 11 is fixed to the fixing bolts 12, 12.
Is fixed by ... A through hole 13 is formed in the upper surface of the support frame 11, and the inner peripheral surface of the through hole 13 has a tapered surface at the upper portion, and a lower portion following the tapered surface corresponds to a sphere 14 described later. It forms a surface that can touch and slide.

The lower end of the bolt 7 is inserted through the center of the through hole 13 into the support frame 11, and the sphere 14 is attached and fixed to the lower end of the bolt 7. . The sphere 14 is attached to the lower end of the bolt 7 by inserting the lower end of the bolt 7 into an insertion hole 14a formed in the center of the sphere 14 and fastening the tip with a nut 15. Catch 16 to be described later
Has a rounded end surface so as to be flush with the outer peripheral surface of the spherical body 14 so as to make smooth contact and sliding contact with the receiving surface 16a.

Further, a resilient material, which is a coil spring 17 in the first embodiment, is provided at the bottom of the support frame 11, and a receiving seat 16 is mounted on the coil spring 17. Have been. This seat 16
On the upper surface of the sphere 14, there is formed an arc-shaped concave receiving surface 16a which coincides with a part (lower surface) of the outer peripheral surface of the sphere 14, and the receiving surface 16a is pressed by the urging force of the coil spring 17 so as to be pressed. Is receiving.

The upper surface of the support frame 11 is a support surface, and an upright wall 11b is formed at an edge of the support surface. Between the support surface and the pedestal part 1, a seismic isolation member 18 made of rubber in the first embodiment is interposed, and the bolt 7 is formed at the center of the seismic isolation member 18. Through the insertion hole 18a. This seismic isolation material 18
On the upper and lower surfaces are fixed sheet metals 18b, 18b for fixing,
A slightly shallower tapered surface 18c is formed in the upper part of the insertion hole 18a, and a deeper tapered surface 18 having a diameter matching the opening of the through hole 13 of the support frame 11 is formed in the lower part.
d is formed. The seismic isolation material 18 and the standing wall 11
A clearance 19 for allowing the seismic isolation member 18 to slide is formed between b.

The seismic isolation bearing structure according to the first embodiment is configured as described above. That is, the upper and lower bolts 7 are fastened by the nuts 9 and the nuts 15 so that a tensile tension is applied via the seismic isolation member 18. This tensile tension strengthens the entire structure and acts as an anchor. It has gained.

When a horizontal vibration is applied to the seismic isolation bearing structure according to the first embodiment, the seismic isolation member 18 slides and deforms, and the resilient member 5, the coil spring 17 and the like deform. Then, the support member 3 and the sphere 14 move along the arc surface by the receiving structure, so that the pedestal 1 follows the vibration. At this time, the tapered hole 6 and the tapered surface 1
8c and 18d are formed, the position change accompanied by the bending of the bolt 7 is allowed from the formation of the through hole 13 of the support frame, and the bolt 7
Is not broken.

When a vertical vibration is applied, the seismic isolation member 18 including the resilient member 5 and the coil spring is used.
By such a contracting action, the vibration is absorbed, and the influence on the pedestal 1 is reduced. At this time, the sphere 14 is
Is engaged with the inner opening edge of the through-hole 13, so that accidents such as jumping out of the bolt 7 and the like can be prevented.

The above operation becomes more effective when the members are adjusted in consideration of the frequency of the vibration. In addition to buildings, structures and the like, for example, the lighting poles 20 juxtaposed along the highway as shown in FIG. If the bearing is used, the effect will be even greater. In this case, by incorporating a plurality of seismic isolation bearing structures A, A... According to the first embodiment between the pedestal portion 1 and the foundation 10, it is possible to always use mechanical vibrations, wind, etc. from a running automobile. The vibration of the illumination pole 20 can be effectively buffered, and the installation life of the illumination pole 20 can be greatly extended.

Next, a second embodiment of the present invention will be described with reference to FIGS. Note that parts common to the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

In the second embodiment, 21 is a pedestal formed of metal or the like forming the receiving portion 21a.
The pedestals 21, 21 are respectively provided with a lower member 22 having flanges 22 a, 23 a and a respective flange 2 of the upper member 23.
2a, 23a and fastened by bolts 28, 28,.

A tapered hole 6 is formed in the center of the lower member 22, and a nut 9 and a screw engraved portion 7a of the bolt 7 can be protruded from the upper member 23 to allow swinging right and left. A through hole 23b is formed.

In the figure, reference numeral 24 denotes a spherical support member in the second embodiment. The support member 24 has an insertion hole formed at the center in the vertical direction, and the upper end of the bolt 7 is formed in the insertion hole. The approaching part is inserted. The support member 24 has a larger diameter than the tapered hole 9 and is engaged with the upper edge of the tapered hole 9.

Further, in FIG.
The upper end of the bolt 7 is inserted into an insertion hole formed at the center of the interposition member 25, and the nut 9 via the washer 8 is positioned on the upper surface of the interposition member 25. You. A receiving recess 24a communicating with the insertion hole is provided at an upper portion of the support member 24.
In the second embodiment, a resilient material serving as a coil spring 26 is provided between the lower surface 4a and the lower surface of the interposition member 25 so as to surround the bolt 7.

Further, the flange 2 of the interposition member 25 described above is used.
In this second embodiment, a resilient material such as a coil spring 27 is interposed between the upper member 23 and 5a.
By the coil springs 27, 27,.
5 and the upper member 23 are connected.

The seismic isolation bearing structure according to the second embodiment is configured as described above. Here, the operation will be described. When the vibration is applied in a state where the vibration is pushed up, the shock is absorbed by the coil springs 26, 27 and 27, and the bolt 7 does not jump out of the through hole 23b. In addition, the support frame 11
When swings right and left, the coil spring 26 is deformed and shortened and absorbed, and the height position of the pedestal portion 21 can be held.

In the case of the second embodiment as well, the present invention can be applied to various kinds of load objects. This display shelf 2
9 is provided with a base 30, a frusto-conical mounting base 31 is formed on the base 30, and receiving shelves 32, 32,... For display are provided on the upper surface or peripheral surface of the mounting base 31.

The mounting base 31 can be disassembled and assembled, for example, and has a space 33 formed therein for accommodating a part of the seismic isolation bearing structure according to the second embodiment. The bolt 7 is configured to be longer in consideration of the frequency of the vibration amplitude, and the lower end of the bolt 7 is inserted into an insertion hole 30 a formed in the base 30 to connect to the foundation 10 (ground).

In addition, if the structure is not used, the display shelf 29 itself will be in an unstable state. In order to solve the problem, the lower end of the base 30 is universally provided with a 360-degree angle. Rotatable ball caster 3
Are attached by a shaft 34a. A coil spring 35 is interposed on the shaft 34a of each of the ball casters 34, 34,... So that even if a vertical stress due to vibration is applied to the base 30 or the like, it can be absorbed. And the ball casters 34, 34
If the contact surfaces with the base 10 are concave surfaces 10a, 10a,..., Even if the ball casters 34, 34.

[0030]

The seismic isolation bearing structure according to the present invention is constructed and operates as described above. Therefore, the target load is not limited to buildings and structures, but it can be widely applied, and by applying tension, it is efficient not only in horizontal direction but also in vertical direction including diagonal direction. In addition to preventing damage to the load, the seismic isolation bearing structure itself can be prevented from being damaged.

[Brief description of the drawings]

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

FIG. 2 is a perspective view of a main part when used for a support column.

FIG. 3 is a sectional view showing a second embodiment.

FIG. 4 is a diagram illustrating a case where the display shelf is used.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pedestal part 2 Through hole 3 Support member 4 Depression 5 Resilient material 6 Taper hole 7 Bolt 8 Washer 9 Nut 10 Foundation 11 Support frame 12 Bolt 13 Through hole 14 Spherical body 15 Nut 16 Receiving seat 17 Coil spring 18 Seismic isolation material 19 Clearance 20 Lighting Pole 21 Pedestal 22 Lower Member 23 Upper Member 24 Support Member 25 Intermediate Member 26 Coil Spring 27 Coil Spring 28 Bolt 29 Display Shelf 30 Base 31 Mounting Base 32 Shelf 33 Space 34 Ball Caster 35 Coil Spring

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[Procedure amendment]

[Submission date] February 27, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0023

[Correction method] Change

[Correction contents]

In the figure, reference numeral 24 denotes a spherical support member in the second embodiment. The support member 24 has an insertion hole formed at the center in the vertical direction, and the upper end of the bolt 7 is formed in the insertion hole. The approaching part is inserted. And this support member 24 is a larger diameter than the taper hole 6, the tapered hole
6 is engaged with the upper edge of the opening.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0025

[Correction method] Change

[Correction contents]

Further, the flange 2 of the interposition member 25 described above is used.
In this second embodiment, a resilient material such as a coil spring 27 is interposed between the upper member 23 and 5a.
By the coil springs 27, 27,.
5 and the upper member 23 are connected. And said
Between the lower member 22 and the support frame 11
Rubber body 37 with built-in spring 36
The seismic isolation rubber body 37 directly supports the load.
ing.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0028

[Correction method] Change

[Correction contents]

The mounting base 31 can be disassembled and assembled, for example, and has a space 33 formed therein for accommodating the bolt 7 and the rubber base 37 of the seismic isolation bearing structure according to the second embodiment. I have. Then, the bolt 7 is configured to be long in consideration of the frequency of the vibration amplitude, and the lower end of the bolt 7 is inserted into an insertion hole 30 a formed in the base 30 to connect to the foundation 10 (ground). Also, this mounting base
The lower end 31a of the base 31 is fitted in the insertion hole 30a.
And the amplitude is increased by the width of the wide insertion hole 30a.
Corresponding. In addition, this display shelf 29
37 is the seismic isolation bomb from the top and bottom, and the middle is a tube such as a lead tube
It is good also as a support material of a shape.

[Procedure amendment 4]

[Document name to be amended] Drawing

[Correction target item name] Figure 3

[Correction method] Change

[Correction contents]

FIG. 3

[Procedure amendment 5]

[Document name to be amended] Drawing

[Correction target item name] Fig. 4

[Correction method] Change

[Correction contents]

FIG. 4

Claims (3)

[Claims] A pedestal is provided with a vertical through-hole, and a support member having a spherical surface at least on a lower surface is fitted on an upper opening edge of the through-hole, and is screwed at the center of the support member. The bolt is inserted by projecting the installation part upward, and a sphere is provided at the lower end of the bolt, the sphere abuts the lower opening edge of a through hole formed on the upper surface of the support frame, and The spring is arranged to be received by a seat with a resilient material interposed therebetween, and is fastened at least to an upper portion of the support member with a nut at a screw engraved portion of the bolt via a resilient material. Earthquake bearing structure. 2. The seismic isolation bearing structure according to claim 1, wherein a seismic isolation member is interposed between the pedestal portion and the support frame body in a state where the bolt is penetrated. 3. An interposed member having a flange at a lower end is mounted on the screw engraved portion of the bolt, and a space between the flange of the interposed member and the cover member attached to the pedestal portion is made of a resilient material. The seismic isolation bearing structure according to claim 1, wherein the seismic isolation bearing structure is provided by elastic connection.