WO2020171275A1 - Seismic isolation device using ball and spring - Google Patents

Abstract

The present invention relates to a seismic isolation device, in which a bottom surface of a central groove formed in an upper end of a lower plate, where an attenuation device is located, is formed to be inclined, the attenuation device including a ball member inserted in an indentation groove formed in a lower portion thereof and a plurality of springs connected to side surfaces thereof so as to attenuate the transfer of vibration, so that the restoring force of the springs can be further improved. According to the present invention, the seismic isolation device using the ball and springs comprises: the lower plate including the central groove in the upper end thereof, the bottom surface of the central groove being inclined towards the center thereof; the attenuation device including a fixing groove in an upper end thereof, a base portion on the upper end thereof, the base portion being supported by one or more vertical springs, a support portion extending upward from a side surface thereof to support a side surface of the base portion, a hemispherical indentation groove formed in a lower end thereof, and a plurality of horizontal springs connected to the internal wall of the central groove, the plurality of horizontal springs being connected to the side surface of the attenuation device at regular intervals; and the ball member which is inserted in the indentation groove so as to support the attenuation device in a state of contacting the bottom surface of the lower plate, wherein the ball member maintains the position of the attenuation device while rotating due to the frictional force with the bottom surface.

Description

Seismic isolation device using ball and spring

The present invention relates to a seismic isolating device using a ball and a spring, and more particularly, a ball member is inserted into an interior groove formed at the lower portion, and a plurality of springs are connected to the side surface to attenuate the transmission of vibration. The present invention relates to a seismic isolating device capable of further improving a restoring force by a spring by obliquely forming a bottom surface of a central groove formed on an upper end of the lower plate.

In general, when an earthquake occurs, all buildings, bridges, etc. on the ground are shaken left and right or up and down according to the type of seismic wave generated from the epicenter, and buildings, bridges, etc. are seriously damaged by this vibration. Items inside fall or fall and are damaged.

Therefore, a seismic isolating device has been developed and used as a means to protect a building, a bridge, or an object inside a building from vibration caused by an earthquake, and as an invention related to this, the "seismic isolating mount" of Korean Patent Laid-Open No. 10-2012-0058283 "And "a three-dimensional seismic isolator having a horizontal vibration reduction function" in Korean Patent Publication No. A seismic isolating unit and a seismic isolating device including the same have been proposed and disclosed.

In the "base isolation stand" of Korean Patent Application Publication No. 10-2012-0058283, a support part coupled to the floor plate of a building, a lower fixing plate coupled to the support part, and located on the lower fixing plate, in the plane of the lower fixing plate And a middle plate linearly reciprocating in a horizontal direction at, and located on the middle plate, performing a linear reciprocating motion in a vertical direction with respect to the horizontal direction within the plane of the middle plate, and the middle plate with respect to the upper plate and the lower fixed plate on which the device rack is installed. An invention has been proposed for a device capable of protecting equipment installed on the upper surface by absorbing vibrations generated by external forces such as earthquakes by including an elastic restoration unit for elastically restoring the position of the upper plate, and the Korean Patent Publication No. 10 In the "three-dimensional seismic isolator with horizontal vibration reduction function" of No. 1595507, a vibration reduction spring is installed on the upper frame installed so that it can move back and forth, left and right and up and down with respect to the fixed lower frame, and the sides of each frame facing each other. The guide block, which moves in contact with the rail installed in, is composed of a buffer to absorb vertical vibration, and the end of the spring is fixed to the upper frame and the lower frame to absorb the vibration of the lower frame and transmitted to the upper frame. Invention has been proposed for a device having a horizontal vibration reduction function capable of preventing this.

In addition, the "two-dimensional seismic isolation device" of the Korean Patent Publication No. 10-1600915 includes a horizontal floor plate part composed of four horizontal floor plates that transmit the upper load to the concrete foundation, and an electric control panel or a lower part of the electric switchboard. A seismic isolating frame unit which is installed and moves freely within a certain range horizontally and forms a certain frame, and both ends are fixedly installed between the horizontal floor plate, and a central part is fixedly installed at the center of the edge of the seismic isolating frame unit, When an earthquake occurs, it includes a tension spring module part composed of four tension spring modules that perform a damping role by imparting stiffness in the horizontal direction to restore the seismic isolation frame to its original position, thereby effectively attenuating the horizontal force caused by earthquakes or vibrations. And a device having improved resilience has been proposed, and in the “seismic isolating unit and a seismic isolating device including the same” of Korean Patent Publication No. 10-1790961, a first groove and a second groove in the lower base and the upper base, respectively. Is formed to prevent the first mount and the second mount from colliding with the first side and the second side, as well as increase the maximum travel distance of the first mount and the second mount, thereby further reducing the impact of seismic force. An invention has been proposed for a device that can help to effectively attenuate.

However, the above inventions mainly use only a plurality of springs to form a restoring force, and there is a configuration limitation in that it is not possible to form a restoring force more than the elastic force of each spring. Thus, a plurality of springs are used to solve this problem. However, there is a need for an invention of a seismic isolating device capable of forming a restoring force more than the elastic force of each spring.

A seismic isolating device using a ball and a spring according to the present invention is an invention proposed to solve the problems of the conventional seismic isolating devices as described above,

Since the conventional inventions have a problem in that they cannot form a restoring force more than the elastic force of each spring, it is an object of the present invention to provide a solution to this.

The seismic isolating device using a ball and a spring according to the present invention is to achieve the above object,

A lower plate having a center groove formed at an upper end with a bottom surface inclined toward the center;

A fixing groove is formed at the upper end and a support part supported by one or more vertical springs is provided at the upper end, and the support part extends upward from the side to support the side surface of the support part, and a hemispherical internal groove is formed at the lower end, and the center Attenuation device in which a plurality of horizontal springs connected to the inner wall of the groove are connected to the side at a predetermined interval; And,

A ball member that is inserted into the indentation groove and supports the attenuation device in a state in contact with the bottom surface of the lower plate, and rotates by a friction force with the bottom surface to maintain the position of the attenuation device; It proposes a seismic isolating device using a ball and a spring characterized in that it is configured to include.

The seismic isolating device using a ball and a spring according to the present invention,

The bottom surface of the center groove of the lower plate that comes into contact with the ball member inserted into the indentation groove at the bottom of the attenuating device connected with a plurality of horizontal springs on the side is inclined to form a restoring force above the elastic force of each spring by gravity. Effect occurs,

As an additional effect due to the above effect, there is an effect of providing a miniaturized seismic isolating device having the same or similar performance as a conventional seismic isolating device.

1 is a perspective view showing a lower plate of a base isolating device using a ball and a spring according to the present invention.

Figure 2 is a perspective view showing a state in which the damping device is provided on the lower plate of the base isolating device using a ball and spring according to the present invention.

3 to 5 are cross-sectional views showing an operating embodiment of a seismic isolating device using a ball and a spring according to the present invention.

6 is an exemplary view showing a state in which a curved groove is formed in the lower plate of the base isolating device using a ball and a spring according to the present invention.

7 is a state diagram of a use state of the base isolation device using a ball and spring according to the present invention.

The present invention relates to a seismic isolating device using a ball and a spring,

A lower plate 100 having a center groove 101 formed at an upper end thereof whose bottom surface is inclined toward the center; A fixing groove 111 is formed on the upper end and a support part 113 supported by one or more vertical springs 112 is provided at the upper end, and a support part 114 is formed extending upward from the side surface of the support part 113. An attenuating device 110 that supports a side surface and has a hemispherical internal groove 115 formed at a lower end, and a plurality of horizontal springs 116 connected to the inner wall of the central groove 101 are connected to the side surface at a predetermined interval; And, the attenuation device 110 is inserted into the indentation groove 115 so as to be in contact with the bottom surface of the lower plate 100, but rotates by a frictional force with the bottom surface and the position of the attenuation device 110 Ball member 120 for holding the; It relates to a seismic isolating device using a ball and a spring, characterized in that configured to include.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, as shown in Fig. 1, the lower plate 100 is a plate-shaped member that is formed in one of various shapes such as a circle or a square and is placed horizontally on the ground or the floor, and has a predetermined depth opened upward. The central groove 101 is formed at the top.

The central groove 101 is a groove into which the attenuation device 110 is inserted, and the inlet is formed in a circular shape and the inner wall to a certain depth is formed vertically, but the bottom surface constituting the lowermost end is formed to be inclined downward toward the center. The cross section of the entire center groove 101 is configured to form a U-shape.

That is, the bottom surface of the central groove 101 has a structure in which the slope is formed sharply from the center to the edge, but some sections constituting the center may be configured to be flat or to have a gentle slope.

In addition, at least one friction member made of a rubber material may be provided at the lower end of the lower plate 100, and the friction member formed in a flat plate shape may be at least one lower open at the lower end of the lower plate 100. It is fitted into the groove to form a strong friction force with the ground or the bottom surface, and prevents the occurrence of scratches due to repeated friction between the bottom surface and the lower end of the lower plate 100.

The attenuating device 110 is a device for attenuating the vibration transmitted to the seismic isolating device of the present invention, which is located inside the center groove 101 and placed horizontally on the ground or floor due to earthquakes, etc. As shown in Fig. 2, a plurality of horizontal springs 116 connected to the inner wall side of the central groove 101 are connected to the side at regular intervals, so that the lower plate 100 due to vibration as shown in Figs. 3 to 5 It is configured to maintain the original stationary state as much as possible despite the reciprocating movement of

The plurality of horizontal springs 116 have one end portion connected to the inner wall side of the central groove 101 and the other end portion connected to the side surface of the attenuation device 110, so that the upper and lower surfaces of the lower plate 100 As 3 or 4 springs that are horizontal with each other, each of the lengths is preferably the same, and it is preferably composed of a tension spring having an appropriate elastic modulus so as to protect the objects placed on the seismic isolator from vibrations in the horizontal direction. And, it may be configured by connecting a plurality of tension springs having different elastic modulus from each other so as to effectively cope with both relatively small vibration and relatively large vibration.

In addition, as shown in Figs. 2, 3 to 5, the support part 113 provided on the upper side of the attenuating device 110 is formed or provided under an object, and is configured to support the object, As a component that supports a specific part, commonly referred to as a leg or a pedestal, the lower end is supported by one or more vertical springs 112, and a fixing groove 111 opened upward is formed at the upper end of the object. , So that parts referred to as pedestal, etc. can be inserted.

In this case, the inlet of the fixing groove 111 may be formed in one of various shapes such as a circle or a square to support a leg or a support suitable for the shape.

In addition, as shown in FIG. 2, the support portion 114 that is formed to extend upward after protruding to the side of the attenuation device 110 for a certain length firmly supports the side surface of the support portion 113 and at the same time (113) is guided so that it can only be lifted in the vertical direction.

That is, the support portion 114 is a form constituting a part of the attenuation device 110 in a fixed state, but the support portion 113 is constant in the vertical direction by one or more vertical springs 112 connected to the lower end. Can be moved distance.

In addition, it is preferable that the at least one vertical spring 112 supporting the support part 113 is composed of a tension spring having an appropriate elastic modulus so as to protect objects placed on the seismic isolator from vibrations in the vertical direction. Since a specific part, referred to as a leg or a pedestal, etc., is not necessarily formed on an object placed on the base isolation device of the invention, in this case, the support portion 114 can directly support the lower end of the object together with the support portion 113. I can.

Therefore, it is preferable that the height of the upper surface of the support part 113 and the height of the upper surface of the support part 140 are formed equal or the height of the upper surface of the support part 113 is higher than the height of the upper surface of the support part 140 However, it is not necessarily limited to this type.

In addition, as shown in Figs. 3 to 5, the hemispherical inlet groove 115 formed downwardly at the lower end of the attenuation device 110 is a space into which the ball member 120 is inserted, A structure that can ensure smooth rotation of the ball member 120 by minimizing the flow of the ball member 120 in the inner groove 115 and minimizing the contact surface is formed in the inner groove 115. desirable.

That is, the internal structure of the internal groove 115 may be a known internal structure such as a ball mouse, but the depth of the internal groove 115 is formed to be shorter than the diameter of the ball member 120, and thus the ball member 120 Only a part of) is inserted into the inlet groove 115 and the other part protrudes downward from the attenuation device 110.

Therefore, the ball member 120 supports the attenuation device 110 and at the same time, the attenuation device 110 in a state in contact with the bottom surface of the lower plate 100 is originally To keep the stationary state as much as possible.

In this case, the fact that the attenuation device 110 maintains the original stopped state as much as possible despite the reciprocating movement of the lower plate 100 does not necessarily mean that the attenuation device 110 is completely stopped, and the attenuation device It is meant to include a state in which (110) is stopped and a state that vibrates within a certain range.

In addition, the ball member 120 may be made of a material such as synthetic rubber or synthetic resin, but is made of a metal material such as iron that is heavier than synthetic resin and has superior strength, so that the attenuation device 110 is provided with the present invention. It is desirable that the seismic isolating device of can sufficiently support the weight of the object it supports.

In addition, the ball member 120 allows vibration due to friction with the bottom surface of the central groove 101 to be attenuated, and the attenuation device 110 has a certain height along the bottom surface of the central groove 101 When it rises, it may be configured to be divided into an outer layer made of an elastic material such as synthetic rubber and an inner layer made of a metal material such as aluminum so that the restoring force for returning to the original position may be improved.

In addition, as shown in FIGS. 3 to 5 and 6, the seismic isolating device using a ball and a spring according to the present invention is a flow of the attenuating device 110 by the ball member 120, which is normally spherical. In order to prevent this, a curved groove 102 having a semi-elliptical cross section is formed in the center of the central groove 101.

Specifically, the curved groove 102 is formed as a groove in a shape in which a part of the ball member 120 contacting the bottom surface of the center groove 101 can fit or be inserted, and accordingly, the attenuation device ( The ball member 120 is fixed to the center of the central groove 101 when an external force does not act on 110), and when an external force occurs due to an earthquake, the ball member 120 is moved from the curved groove 102. It is a configuration that can be deviated.

In addition, as described above, the ball member 120 may be entirely composed of iron among metals, and since iron has a property of sticking to a magnetic body, the center of the central groove 101 is composed of a magnetic body having a magnetic force. When the center of the central groove 101 in which the curved groove 102 is formed is formed of a magnetic material, in addition to the effect of improving the restoring force by the spring, the ball member ( An effect of preventing the flow of the attenuation device 110 by 120) is additionally generated.

Therefore, while the conventional seismic isolating device can only form a restoring force corresponding to the elastic force of each spring, the seismic isolating device of the present invention has the elastic force of each spring and the gravitational force due to the inclined bottom surface and magnetic force due to the magnetic material. It is a configuration in which the effect of forming a restoring force of a magnitude corresponding to the added resultant force occurs, and accordingly, the effect of protecting objects, etc. from vibrations caused by earthquakes, etc. in the state of use diagram shown in FIG. Occurs.

In addition, as an additional effect due to the above effect, the seismic isolating device of the present invention has the same or similar performance as the conventional seismic isolating device even in a smaller state than the conventional seismic isolating device.

The embodiments introduced above are provided by way of example in order to sufficiently convey the technical idea of the present invention to those of ordinary skill in the technical field to which the present invention pertains, and the present invention is based on the above-described embodiments. It is not limited and may be embodied in other forms.

In order to clearly describe the present invention, parts irrelevant to the description are omitted from the drawings, and in the drawings, the width, length, thickness, etc. of the components may be exaggerated or reduced for convenience.

In addition, the same reference numbers throughout the specification indicate the same elements.

Claims (3)

A lower plate 100 having a center groove 101 formed at an upper end thereof whose bottom surface is inclined toward the center; A fixing groove 111 is formed on the upper end and a support part 113 supported by one or more vertical springs 112 is provided at the upper end, and a support part 114 is formed extending upward from the side surface of the support part 113. An attenuating device 110 that supports a side surface and has a hemispherical internal groove 115 formed at a lower end, and a plurality of horizontal springs 116 connected to the inner wall of the central groove 101 are connected to the side surface at a predetermined interval; Supports the attenuating device 110 in a state that is inserted into the inlet groove 115 and in contact with the bottom surface of the lower plate 100, but rotates by friction with the bottom surface and maintains the position of the attenuating device 110 A ball member 120 to make; Seismic isolation device using a ball and a spring, characterized in that configured to include. The method of claim 1, In the center of the central groove 101, A seismic isolating device using a ball and a spring, characterized in that a curved groove 102 having a semi-elliptic cross section is formed. The method of claim 1, The ball member 120, The whole is made of iron, The central portion of the central groove 101, A seismic isolator using a ball and a spring, characterized in that consisting of a magnetic body.

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