KR20110004680U - The seismic isolator having the multistage surface - Google Patents

Abstract

The present invention relates to a ball bearing isolating device having a multi-stage inner surface, and more particularly, to the seismic isolator which is a device mounted on the ground and the structure or facility to prevent damage of the structure or facility due to the earthquake, the strength of the earthquake Regardless of the present invention, the present invention relates to an improved design of an internal groove of a plate into which a bearing is inserted, so as to efficiently absorb vibration and protect facilities and structures on the plate.

In the seismic isolation device of the present invention, the upper plate 10 and the lower plate 12 have an inner groove in the shape of a disc, and have a primary inner surface A and A having a predetermined inclination angle with respect to the horizontal plane around the center portions 10a and 12a. It is characterized in that the plate having a multi-stage inner surface is formed, the secondary inner surface (B, B ') is formed at a predetermined angle bent with respect to the primary inner surface.

Isolation Device, Multistage

Description

Ball bearing isolator with multi-stage inner surface {THE SEISMIC ISOLATOR HAVING THE MULTISTAGE SURFACE}

The present invention relates to a ball bearing isolating device having a multi-stage inner surface, and more particularly, to the seismic isolator which is a device mounted on the ground and the structure or facility to prevent damage of the structure or facility due to the earthquake, the strength of the earthquake Regardless of the present invention, the present invention relates to an improved design of an internal groove of a plate into which a bearing is inserted, so as to efficiently absorb vibration and protect facilities and structures on the plate.

The seismic isolator is installed between the ground and the structure or installed facilities in order to prevent damage caused by the conduction of the structure due to the earthquake. It is often installed between the bridge and the bridge deck, but it is a large computer or a tower computer. B. The height of projecting on the ground is higher than the area of the ground, such as communication equipment, and the volume is relatively large. In the case of facilities equipped with a large number of precision parts, it is faced with a fatal problem that cannot be recycled in case of damage caused by falling. In order to solve this problem, a seismic isolator is installed, and a facility for preventing the fall due to an earthquake is installed thereon.

The seismic isolator maintains a fixed state in normal times, and in case of an earthquake, it absorbs vibrations and protects the facility from an earthquake.

The seismic isolator basically inserts a roll or bearing between the upper plate and the lower plate, and in the event of an earthquake, the upper plate moves left and right on the bearing with respect to the lower plate, absorbing vibrations on the upper plate. To protect the facilities.

Conventional seismic isolator is formed so that the inner groove of the plate to form a curved surface, such a seismic isolation device is the upper plate is swinging inclined up and down with respect to the lower plate, which causes the structure or facilities seated on the upper plate is damaged by falling There was a problem.

In order to solve this problem, the inventor of the present invention devised a patent application "developed ball bearing isolator with a conical groove" (application number: 10-2009-0042389).

The present invention is an inner groove of the plate is formed as a conical groove, so that during the earthquake to improve the upper plate to move only back and forth and left and right without swinging up and down to prevent damage caused by the fall of the structure or facility seated on the upper plate Devised.

However, when a more severe earthquake of magnitude 7 or more occurs, it is not easy to prevent the conduction of the structure or the facility on the upper plate only when the inner surface of the plate has a single conical groove shape, as suggested by the present invention.

Therefore, even in the case of the earthquake of magnitude 7 or more, there is a need to improve the plate structure of the isolator in order to prevent damage caused by the conduction of the structure or the facility placed on the upper plate of the isolator. That is, in case of strong and weak earthquake, development of useful base isolation device is required.

The present invention was devised to solve the above problems, and the object of the present invention is to allow the upper plate on the bearing to move only forwards, backwards, left, and right without swinging in the seismic isolator, and is effective even in case of a strong earthquake as well as a weak earthquake. It is to provide a ball bearing isolating apparatus having a multi-stage inner surface, which can effectively and efficiently prevent structures and facilities settled on an upper plate from being damaged by conduction.

In order to achieve the above object, in the ball bearing base isolation apparatus having a multi-stage inner surface according to a preferred embodiment of the present invention, the upper plate is fixedly attached to the upper support, the lower plate is fixedly attached to the lower support, the upper plate And the lower plate are installed against each other in pairs, a ball bearing is mounted between the upper plate and the lower plate,

The upper plate 10 and the lower plate 12 has an inner groove having a disc shape, the primary inner surface (A, A ') having a predetermined inclination angle with respect to the horizontal plane around the center (10a, 12a) is formed, It characterized in that the plate having a multi-stage inner surface formed with the secondary inner surface (B, B ') bent at a certain angle with respect to the primary inner surface.

According to a preferred embodiment, the primary inner surface A of the upper plate and the opposite primary inner surface A 'of the lower plate are parallel to each other, and the secondary inner surface B of the upper plate and the opposite side 2 of the lower plate. The vehicle inner surface B 'is characterized in that they are parallel to each other.

According to a preferred embodiment, the first inner surfaces A, A 'and the second inner surfaces B, B' of the plates 10, 12 form a plurality of concentric circles about the central portions 10a, 12a. The stop protrusions 100 and the stop grooves 102 are spaced apart from each other at regular intervals and are formed alternately.

As described above, in the seismic isolation device of the present invention, the inner surface of the plate is composed of multiple stages, so that in the case of a weak earthquake, the bearing moves on the primary inner surface having a low inclination angle, and in the case of a strong earthquake, the bearing moves on the secondary inner surface having a high inclination angle. As a result, the seismic isolator can efficiently and reliably be operated regardless of the strength of the earthquake.

Hereinafter, with reference to the accompanying drawings will be described in more detail with respect to the ball bearing base isolation device having a multi-stage inner surface of the present invention.

1 is an exploded perspective view for explaining the basic structure of the seismic isolator according to a preferred embodiment of the present invention, Figure 2 is a combined perspective view showing a state that the two supports are attached to each top and bottom.

1 and 2, the basic structure of the base isolation device will be described.

The rectangular support is located in pairs with the upper support 20 and the lower support 22. Each support plate is attached to the disk-shaped plate 10, 12, respectively. That is, the upper plate 10 is fixed to the upper support 20, and the lower plate 12 is fixedly attached to the lower support 22 by bolts. Although the drawings show a state in which two plates are attached to one support, the present invention is not necessarily limited thereto, and two or more plates may be installed depending on the length or need of the support.

The plate fixedly attached to the support has a disc shape, and the upper plate 10 attached to the upper support 20 and the lower plate 12 attached to the lower support 22 correspond to each other in pairs. The bearing 30 is located between the paired upper plate 10 and the lower plate 12. The bearing 30 is positioned between the upper plate 10 and the lower plate 12, so that in the event of an earthquake, the upper support 20 to which the upper plate 10 is fixed by the bearing 30 freely vibrates. This prevents the facility from falling over in one direction.

In FIG. 2, the two supports are coupled to each other by the connecting rod 24, but, if necessary, two or more supports may be connected to each other by the connecting rod 24. Fixing of the connecting rod and the support is made by the fixing bolt (26).

Although not shown, a cross-shaped or X-shaped support block may be installed on the upper part of the upper supporter, and a panel may be laid on the upper part thereof to be used as a raised floor provided with a seismic isolation device.

As for the seismic isolation device, the upper support 20 and the lower support 22 should be fixed to each other when an earthquake does not occur. In the case of an earthquake, the upper support 20 is separated from each other by the lower support 22. It should vibrate freely from side to side. To this end, a fastener 40 is installed to connect the upper support 20 and the lower support 22 so that the upper support 20 and the lower support 22 do not move with each other.

Since the seismic isolation device of the present invention is a design related to the upper plate and the lower plate, that is, the inner surface of the plate, which are paired with each other, the plate structure of the present invention will be described in more detail.

3 is a cross-sectional schematic view of a plate of the base isolation device according to a preferred embodiment of the present invention.

Referring to FIG. 3, it can be seen that the paired upper plate 10 and the lower plate 12 have inner surfaces of multiple stages. That is, the primary inner surfaces A and A 'having a predetermined inclination angle α with respect to the horizontal plane are formed around the central portions 10a and 12a, and the secondary inner surfaces B, which are bent at an angle with respect to the primary inner surface, B ') is formed. The secondary inner surfaces B and B 'are bent to have an inclination angle of "β" with respect to the horizontal plane.

As such, in the present invention, the pair of upper plates and lower plates, that is, the inner surfaces of the plates are formed in multiple stages may be used to effectively and efficiently place structures and facilities placed on the upper plates not only in a weak earthquake but also in case of a strong earthquake. This is to prevent damage from falling. Conventionally, in the case of a strong earthquake, there is a risk that the bearing hits the edge of the inner groove and loses seismic function. However, in the seismic isolation device of the present invention, since the inner surface is formed in multiple stages, the bearing moves on the primary inner surface having a relatively low inclination angle in the case of a weak earthquake, and in the case of a strong earthquake, the vibration is more severely shaken. Since it moves up to the secondary inner surface having an inclination angle, the bearing contact portion is different according to the strength of the earthquake, so that the seismic isolation function can be effectively and efficiently performed.

Here, α <β, and preferably 2α = β. As a result of the experiment by the present inventors, preferably, α is about 3 degrees, and β is about 6 degrees, and both of the weak earthquake and the strong earthquake smoothly performed the seismic isolation function.

On the other hand, the primary inner surface and the secondary inner surface of the plate does not have a curved surface, but has a flat surface that is not bent. As indicated by the arrows, the primary inner surface A of the upper plate 10 and the primary inner surface A 'opposite the lower plate 12 are parallel to each other and the secondary of the upper plate 10 It means that the inner secondary surface B 'opposite the inner surface B and the lower plate 12 are parallel to each other. This is so that in the seismic isolator, in the event of an earthquake, the upper plate on the bearing moves only back and forth and left and right without swinging up and down.

4 is a view showing a state in which the plate of the seismic isolator moves in accordance with a vibration according to a preferred embodiment of the present invention.

Like the "applied ball bearing isolator with conical groove," which the present inventors have previously applied, the present invention also has a flat surface that is not curved, but the inner surface of the plate does not have a curved surface. Accordingly, as shown in Figure 4, in the seismic isolator of the present invention, when the earthquake occurs, the upper plate on the bearing only moves up, down, left and right without swinging up and down. This prevents damage due to earthquakes of structures and facilities on the top plate.

5 is a perspective view of a plate, according to another preferred embodiment of the present invention.

Referring to FIG. 5, a plurality of concentric circles are formed on the primary inner surfaces A and A 'and the secondary inner surfaces B and B' of the plates 10 and 12 while forming a plurality of concentric circles about the central portions 10a and 12a. It can be seen that the stop protrusion 100 and the stop groove 102 are alternately formed to be spaced apart from each other at a predetermined interval.

As such, the reason why the stop protrusions 100 and the stop grooves 102 are formed on the inner surfaces of the upper plate and the lower plate is to prevent the bearings from failing in contact with the clouds due to violent swings and vibrations during the earthquake. In addition, it is to increase the frictional resistance with the bearing so that the bearing can quickly return to the center of the inner surface.

The foregoing has outlined rather broadly the features and technical advantages of the subject innovation in order to better understand the utility model registration claims of the subject matter described below. Additional features and advantages of the utility model registration claims of the present invention will be described below. It should be appreciated by those skilled in the art that the conception and specific embodiments of the presently disclosed subject matter can be used immediately as a basis for designing or modifying other structures for carrying out similar purposes as the present invention.

In addition, the inventive concept and embodiments disclosed in the present invention may be used by those skilled in the art as a basis for modifying or designing other structures for carrying out the same purposes of the present invention. In addition, such modifications or altered equivalent structures by those skilled in the art may be variously changed, substituted and changed without departing from the spirit or scope of the invention described in the utility model registration claims.

1 is an exploded perspective view for explaining the basic structure of the seismic isolator according to a preferred embodiment of the present invention.

2 is a perspective view of a seismic isolator according to a preferred embodiment of the present invention.

Figure 3 is a schematic cross-sectional view of a plate of the base isolation device, according to a preferred embodiment of the present invention.

Figure 4 is a view showing a state in which the plate of the seismic isolator moves in accordance with a vibration according to a preferred embodiment of the present invention.

5 is a perspective view of a plate, according to another preferred embodiment of the present invention.

** Description of symbols for the main parts of the drawing **

10: upper plate 10a: center portion

10b: refraction

12: lower plate 12a: center

12b: refraction

A, A ': Inside 1st B, B': Inside 2nd

100: stopper 102: stop groove

20: upper support

22: lower support

24: connecting rod 26: fixing bolt

30: bearing 40: fixture

Claims (3)

An upper plate is fixedly attached to the upper support, and a lower plate is fixedly attached to the lower support. , The upper plate 10 and the lower plate 12 has an inner groove having a disc shape, the primary inner surface (A, A ') having a predetermined inclination angle with respect to the horizontal plane around the center (10a, 12a) is formed, Ball bearing isolating apparatus having a multi-stage inner surface, characterized in that the plate having a multi-stage inner surface formed with a second inner surface (B, B ') bent at a predetermined angle with respect to the primary inner surface. The method of claim 1, The primary inner surface A of the upper plate and the opposite primary inner surface A 'of the lower plate are parallel to each other, and the secondary inner surface B of the upper plate and the opposite secondary inner surface B' of the lower plate. Ball bearing isolating device having a multi-stage inner surface, characterized in that parallel to each other. The method of claim 1, The first inner surfaces A and A 'and the second inner surfaces B and B' of the plates 10 and 12 form a plurality of concentric circles about the central portions 10a and 12a, Ball bearing seismic isolation device having a multi-stage inner surface, characterized in that the stop groove 102 is alternately formed to be spaced apart from each other at a predetermined interval.

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