JPH09242820A - Base isolating supporting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cheaply, easily, and base-isolatedly support articles in a shelf, a general housing, etc., without increasing the height of the articles or the general housing. SOLUTION: Plural supporting plates 8 are mounted in the inside of a shelf at fixed distance apart vertical, and the upper surfaces 8A of the supporting plates 8 are formed of flat faces positioned on a horizontal surface. Shelf boards 16 are arranged-installed on the upper surfaces 8A of the respective supporting plates 8 through spherical steel balls 10, grease, and tension springs 14. Each shelf board 16 is arranged within the outline of the supporting plate 8 so that its center O coincides with the center of the supporting plate 8. Further, plural pans 18 are attached on the places close to the outer edge of the undersurface of the shelf board 16 at intervals in the direction in which the outer edge of the shelf plate 16 extends. In the recessed part of each pan 18, a steel ball 10 coated with grease is inserted, and thereby the shelf board 16 is supported so that it can move horizontally in any direction on the supporting plate 8.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a structure for seismically supporting a structure on a support.

[0002]

2. Description of the Related Art Valuable arts and crafts are placed on the shelves of museums, and important medical equipment and medicines are placed on the shelves of hospitals. Valuable items are placed. Then, in order to prevent the articles in the shelves from falling over or falling from the shelves in the event of an earthquake, conventionally, the shelves have been firmly fixed to the building and appropriate fasteners have been provided as necessary. It has been used to fasten articles to shelves.

[0003]

However, in such a method, it is troublesome to take the articles in and out, and it is possible to prevent the articles from falling and falling when an earthquake occurs even by simply placing the articles on the shelf board. A seismic isolation support structure is desired,
A simple and low-cost seismic isolation support structure that can be applied to shelves has not been provided so far. In addition, a structure that supports multiple base-isolated rubbers for seismic isolation is provided for ordinary houses, but this method allows the ordinary house to be mounted on multiple layers of seismic-isolated rubber, thus increasing the height of the house. Since the size of the seismic isolation rubber is large, and the seismic isolation rubber is expensive, a structure for supporting the seismic isolation easily at a lower cost without increasing the height has been desired. The present invention has been devised in view of the above circumstances, and an object of the present invention is to provide an article or a general house placed on a shelf without increasing the height of the article or the general house. It is to provide a structure that supports seismic isolation easily at a lower cost.

[0004]

In order to achieve the above-mentioned object, the present invention is a structure for seismically supporting a structure on a support, which is disposed between the support and the structure. A plurality of bearings that support the structure above in a two-dimensionally displaceable manner in the horizontal direction, one end of each of which is connected to the support and the other end thereof is connected to the structure, and the bearings are arranged so as to extend in a substantially horizontal direction. And at least three tension springs, which are stretched when a horizontal external force is applied to the support body to buffer the force acting on the structure body from the support body to suppress the acceleration generated in the structure body and to support the support body. A tension spring for returning the position of the structure with respect to the support to the initial position when the external horizontal force acting on the body disappears.

Further, the present invention is characterized in that the bearing is lubricated with grease. Also, the present invention
The bearing is composed of a grease-lubricated steel ball housed in a tray provided on one of the support and the structure and rolling on a rolling surface formed on the other. To do. Further, the present invention is configured such that the bearing is a sliding member provided on one of the support and the structure and having a grease-lubricated flat surface that slides on a sliding surface formed on the other. It is characterized by Further, the present invention is characterized in that the support is a support plate forming a part of a shelf, and the structure is a shelf plate arranged on the support plate.

The present invention is also characterized in that the support is a foundation provided on the ground and the structure is a building. Further, the present invention is characterized in that the tension springs are radially arranged around a predetermined point on the support. Further, the present invention is characterized in that the angular intervals of the tension springs arranged radially are equal intervals. Also,
The present invention is characterized in that the position of the predetermined point is determined so as to be substantially directly below the center of gravity of the structure.

In the present invention, when an earthquake occurs, the structure is horizontally displaced by the bearings, the external force is buffered by the tension spring, and when the external force disappears, the tension spring returns the structure to the initial position. In this case, if the bearing is lubricated with grease, the grease has a damping function.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. First, the first embodiment applied to a shelf will be described. 1 is a sectional side view of the shelf, FIG. 2 is a sectional plan view thereof, FIG. 3 is a sectional front view thereof, and FIG. 4 is an enlarged sectional view of a steel ball portion. Reference numeral 2 is a floor, 4 is a wall, 6 is a shelf, and the shelf 6 is provided with a vertically long shelf main body 602 and a shelf main body 602.
The back plate 604, which forms the back surface of, faces the wall 4. Between the back plate 604 and the left and right side plates 606 of the shelf body 602,
A plurality of support plates 8 are attached at intervals in the vertical direction, and an upper surface 8A of the support plate 8 is a flat surface located on a horizontal plane. Further, on the upper surface 8A of each support plate 8, a spherical steel ball 10, a grease 12, and a shelf plate 16 are arranged via a tension spring 14. In this embodiment, the support plate 8 corresponds to a support, the shelf 16 corresponds to a structure, the steel ball 10 corresponds to a bearing, and the upper surface 8A of the support plate 8 corresponds to a rolling surface.

As shown in FIG. 2, the shelf board 16 is formed so that its width and length are smaller than that of the support board 8.
Is arranged at a distance from the outer edge of the support plate 8 so that its center O coincides with the center of the support plate 8 within the contour of the support plate 8. A plurality of trays 18 shown in FIG. 4 are attached to the lower surface of the shelf board 16 at a position facing the outer edge of the shelf board 16 at intervals in the extending direction of the outer edge of the shelf board 16. The tray 18 is provided with a spherical concave portion 1802 that is opened downward.
The steel ball 10 coated with grease 12 is loaded in 02, so that the shelf 16 is supported on the support plate 8 so as to be movable in any horizontal direction.

The four tension springs 14 have the same spring constant, and each tension spring 14 is provided between the support plate 8 and the shelf plate 16,
The racks 16 are arranged radially at an interval of 90 degrees about a predetermined point located substantially below the center of gravity (center O) of the shelf 16 and extend in a substantially horizontal direction. The spring 14 is arranged parallel to the longitudinal direction of the shelf board 16, and the remaining two tension springs 14 are arranged parallel to the width direction of the shelf board 16. The end 1402 of each tension spring 14 toward the center is connected to the support plate 8 via the hook 20, and the end 1404 away from the center O is connected to the shelf plate 16 via the hook 20.
In the embodiment, the end portion 1402 close to the center is slightly inclined with respect to the horizontal direction so that it is slightly lower than the end portion 1404 distant from the center O. These tension springs 14
Due to the balance of the forces, the shelf board 16 is arranged so that its center O is located on the center of the support board 8.

In this embodiment, when an earthquake occurs, for example, as shown in FIG.
As shown in FIG. 3, if an external force F acts on the shelf 6, the shelf 16 is supported on the support plate 8 so as to be displaceable in the horizontal direction. Move. Therefore, the two tension springs 14A sag and the remaining two tension springs 14B extend, whereby the external force is buffered and the acceleration generated on the shelf 16 is suppressed. Then, when the earthquake subsides and the external force acting on the support plate 8 disappears, the tension spring 14 causes the shelf plate 16 to reciprocate on the support plate 8 so as to return to the initial position on the support plate 8, and at this time, , The damping function is exerted by the viscosity of the grease 12, the movement of the shelf 16 on the support plate 8 is stopped relatively quickly, and the shelf 16 returns to its initial position and stands still. Therefore, the inexpensive and simple seismic isolation support structure using the steel balls 10 and the tension springs 14 can prevent external force from being directly transmitted to the article placed on the shelf board 16, and the article can fall or be damaged by the earthquake. Can be prevented. Further, in the embodiment, the shelf board 1
Centering on a predetermined point located directly below the center of gravity of 6,
Since the tension springs 14 are arranged to extend radially at equal angular intervals, it is difficult for a rotation moment to be applied to the shelf plate 16 when an external force acts on the shelf 6, and the shelf plate 16 is placed at the initial position. It is more advantageous in returning.

The arrangement structure of the tension springs 14 is not limited to the structure of the embodiment, and for example, three pieces may be arranged at intervals of 120 degrees as shown in FIG. Eight may be arranged at intervals of 45 degrees as shown in
Alternatively, as shown in FIG. 7, the tension springs 14 that extend in the longitudinal direction of the shelf plate 16 may be spaced equidistant from the center O, or, as shown in FIG. Eight tension springs 14 extending in the width direction and the longitudinal direction of the plate 16 may be arranged symmetrically with respect to imaginary lines extending through the center O in the width direction and the longitudinal direction.
Further, in the embodiment, the case where the steel ball 10 is used as the bearing has been described. However, as shown in the front view of FIG. 9, a block-shaped sliding member 20 having a flat surface 20A at the tip is used instead of the steel ball 10. If such a sliding member 20 is used, the contact area with the support plate 8 can be made large, which is particularly advantageous when supporting a large load. Further, although the grease 12 can be omitted, the use of the grease 12 is advantageous in that the movement of the shelf 16 can be relatively quickly stopped due to its damping function.

Next, a second embodiment applied to a general house will be described. FIG. 10 is a sectional front view of a general house, FIG.
Is a plan view of the same, and FIG. 12 is an enlarged sectional view of an essential part. Reference numeral 30 denotes the ground, and a foundation 32 made of reinforced concrete is formed in a concave shape on the ground 30, and from this foundation 32, a large number of convex portions 34 are formed at intervals on the left and right, and the upper surface 34A of each convex portion 34 is formed.
Are formed by flat surfaces located on the same horizontal plane. On the upper surface 34A of these convex portions 34, a spherical steel ball 40,
A wooden house 46 is arranged via a grease 42 and a tension spring 44. In this embodiment, the foundation 32 corresponds to the support, the wooden house 46 corresponds to the structure, the steel ball 40 corresponds to the bearing, the upper surface 34A of the convex portion 34 corresponds to the rolling surface, and the upper surface 34A. A wall portion 34B for preventing the steel ball 40 from falling is provided on the outer edge portion of the.

As shown in FIG. 11, the wooden house 46 is arranged within the outline of the foundation 32 at a distance from the outer edge of the foundation 32. The lower part of the wooden house 46 is shown in FIG.
As shown in, the base 4602, joists 4604, flooring 46
The punching metal 4 is formed between the lower part of the wooden house 46 and the outer edge of the foundation 32 as shown in FIG.
608 is provided so as to prevent a mouse or the like from entering the lower part of the wooden house 46. The lower surface of the wooden house 46,
That is, as shown in FIG. 12, a plurality of trays 48 are attached to the bottom surface of the base 4602 corresponding to the protrusions 34. The tray 48 is provided with a spherical concave portion 4802 opened downward, and each of the concave portions 4802 has a grease 4
The steel balls 40 coated with 2 are loaded, whereby the wooden house 46 is supported on the foundation 32 so as to be movable in any horizontal direction.

The four tension springs 44 have the same spring constant, and each tension spring 44 is centered on a predetermined point 0 between the foundation 32 and the wooden house 46, which is located just below the center of gravity of the wooden house 46. Are arranged radially at an interval of 90 degrees and extend substantially horizontally. The center end 4402 of each tension spring 44 is connected to the foundation 32 via the hook 50, and the end 4404 away from the center O is hook 50.
Is connected to the wooden house 46 through, and in the embodiment, the end portion 4402 near the center is arranged slightly inclined with respect to the horizontal direction so that it is slightly lower than the end portion 4404 distant from the center O. . The wooden house 46 is arranged such that the center of gravity of the wooden house 46 is located on the center of the foundation 32 by the balance of the forces of the tension springs 44.

Also in the second embodiment, similarly to the first embodiment, when an earthquake occurs, the tension spring 44A buffers the external force to suppress the acceleration generated in the wooden house 46, and the external force acting on the wooden house 46 disappears. Then, the tension spring 44 causes the wooden house 46 to return to its original position through the grease 42 and to stand still. Therefore, with a cheap and simple seismic isolation support structure using the steel balls 40 and the tension springs 44, it is possible to perform seismic isolation support without increasing the height of the wooden house 46. Furthermore,
In the embodiment, since the tension springs 44 are arranged radially at equal angular intervals around a predetermined point 0 located substantially below the center of gravity of the wooden house 46, they are arranged radially at the time of occurrence of an earthquake. The wooden house 46 is less likely to receive a rotational moment, which is more advantageous in returning the wooden house 46 to the initial position. Further, the arrangement structure of the tension spring 44 is the same as the first structure.
Similar to the embodiment, they may be arranged as shown in FIGS. 5 to 8, and a sliding member 20 as shown in the front view of FIG. 9 may be used as a bearing.

[0017]

As is clear from the above description, the present invention
A structure for seismically supporting a structure on a support, and a plurality of bearings arranged between the supports to support the structure so that the structure can be two-dimensionally displaced horizontally in the support When,
Each one end is connected to the support and the other end is connected to the structure,
At least three tension springs arranged to extend in a substantially horizontal direction, which are stretched when a horizontal external force is applied to the support body to buffer the force acting from the support body to the structure. The structure is provided with a tension spring that suppresses the acceleration generated in the structure and that restores the position of the structure to the initial position with respect to the support when the external external force acting on the support disappears. Therefore, it becomes possible to support the articles and general houses placed on the shelves with a low cost and simple seismic isolation support structure using a bearing and a tension spring without increasing the height.

[Brief description of drawings]

FIG. 1 is a sectional side view of a shelf.

FIG. 2 is a cross-sectional plan view of a shelf.

FIG. 3 is a sectional front view of a shelf.

FIG. 4 is an enlarged sectional view of a steel ball portion.

FIG. 5 is a plan view showing an arrangement example of tension springs.

FIG. 6 is a plan view showing an arrangement example of tension springs.

FIG. 7 is a plan view showing an arrangement example of tension springs.

FIG. 8 is a plan view showing an arrangement example of tension springs.

FIG. 9 is a front view of a modified example of the bearing member.

FIG. 10 is a sectional front view of a general house.

FIG. 11 is a plan view of a general house.

FIG. 12 is an enlarged cross-sectional view of a main part of a general house.

[Explanation of symbols]

 6 shelves 8 support plates 10 and 40 steel balls 12 and 42 grease 14 and 44 tension springs 16 shelf plates 18 and 48 saucer 30 ground 32 foundation 34 convex portion 46 wooden house

Claims (9)

[Claims] 1. A structure for seismically supporting a structure on a support, the structure being disposed between the supports so that the structure can be horizontally two-dimensionally displaced on the support. A plurality of bearings for supporting, one end of each of which is connected to the support and the other end of which is connected to the structure,
At least three tension springs arranged to extend in a substantially horizontal direction, which are stretched when a horizontal external force is applied to the support body to buffer the force acting from the support body to the structure. An extension spring that suppresses the acceleration generated in the structure and that returns the position of the structure with respect to the support to the initial position when the horizontal external force that acts on the support disappears. Quake support structure. 2. The seismic isolation support structure according to claim 1, wherein the bearing is lubricated with grease. 3. The bearing is composed of a grease-lubricated steel ball that is housed in a tray provided on one of the support and the structure and rolls on a rolling surface formed on the other. The seismic isolation support structure according to claim 1. 4. The bearing comprises a sliding member provided on one of the support and the structure, and having a grease-lubricated flat surface that slides on a sliding surface formed on the other. The seismic isolation support structure according to claim 1. 5. The seismic isolation support structure according to claim 1, wherein the support body is a horizontal support plate that constitutes a part of a shelf, and the structure body is a shelf plate disposed on the support plate. 6. The seismic isolation support structure according to claim 1, wherein the support body is a foundation provided on the ground, and the structure body is a building. 7. The seismic isolation support structure according to claim 1, wherein the tension springs are arranged radially around a predetermined point on the support. 8. The seismic isolation support structure according to claim 7, wherein the radial intervals of the tension springs are equal. 9. The seismic isolation support structure according to claim 8, wherein the position of the predetermined point is determined so as to be substantially directly below the center of gravity of the structure.