KR20200100990A - Vibration isolation device with improved restoring force using ball and spring - Google Patents

Abstract

The present invention relates to a seismic isolation apparatus capable of improving restoring force generated by a spring since the bottom surface of a center groove formed at the upper end of a lower plate, at which a damping device having a ball member inserted into a recessed groove formed at the lower part thereof and having a plurality of springs connected to the side surface thereof so as to reduce the transmission of vibration is positioned, is obliquely formed. A seismic isolation apparatus having improved restoring force using balls and springs, according to the present invention, comprises: a lower plate having a center groove which is formed at the upper end thereof and of which the bottom surface is inclined toward the center portion thereof; a damping device having a fixing groove formed at the upper end thereof, having a prop part provided at the upper end thereof and supported by one or more vertical springs, having a hemispherical recessed groove formed at the lower end thereof, and having a plurality of horizontal springs connected to the inner wall of the center groove and connected to the side surface thereof at predetermined intervals; a first ball member, which is inserted into the recessed groove so as to support the damping device while coming in contact with the bottom surface of the lower plate, rotates by means of friction force with the bottom surface, and maintains the position of the damping device; an upper plate having a fitting hole into which the prop part is fitted and which penetrates the upper and lower ends thereof, and having a plurality of hemispherical lower grooves formed at the lower end thereof; and a plurality of second ball members, which are inserted into each of the plurality of lower grooves so as to support the upper plate while coming in contact with the upper end surface of the lower plate, rotate by means of friction force with the upper end surface of the lower plate, and maintain the position of the upper plate.

Description

TECHNICAL FIELD [Vibration isolation device with improved restoring force using ball and spring}

The present invention relates to a seismic isolating device having an improved restoring force using a ball and a spring, and more particularly, a ball member is inserted into an inner recess formed at the lower side, and a plurality of springs are connected to the side to reduce 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 a lower plate in which the damping device is located.

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 the invention related thereto is the “seismic isolating stand” of Korean Patent Publication No. 10-2012-0058283 ”And “a three-dimensional seismic isolator having a horizontal vibration reduction function” in Korean Patent Publication No. 10-1595507, a “two-dimensional seismic isolator” in Korean Patent Publication No. 10-1600915, and“ A seismic isolating unit and a seismic isolating device including the same have been proposed and disclosed.

In the “base isolation stand” of the 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 be moved back and forth, left, 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 isolator” of the Korean Patent Publication No. 10-1600915 includes a horizontal floor plate portion composed of four horizontal floor plates that transmit the upper load to the concrete foundation, and an electric control panel or a lower portion 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-described inventions mainly use only a plurality of springs to form a restoring force, and there is a limitation in that it is impossible to form a restoring force greater than the elastic force of each spring. There is a need for an invention of a seismic isolating device capable of forming a restoring force that is more than the elastic force of the spring.

Republic of Korea Patent Publication No. 10-2012-0058283 (2012. 06. 07) Republic of Korea Patent Publication No. 10-1595507 (2016. 02. 12) Republic of Korea Patent Publication No. 10-1600915 (2016. 03. 02) Korean Registered Patent Publication No. 10-1790961 (2017. 10. 23)

A seismic isolating device having an improved restoring force 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,

Since the conventional inventions have a limitation in that they cannot form a restoring force more than the elastic force of each spring, an object thereof is to provide a solution.

A seismic isolating device having an improved restoring force using a ball and a spring according to the present invention is intended 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 top and a support part supported by one or more vertical springs is provided at the top, a hemispherical internal groove is formed at the bottom, and a plurality of horizontal springs connected to the inner wall of the center groove are connected to the side at regular intervals. Attenuation device; A first ball member that is inserted into the inner groove and supports the attenuating 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; An upper plate having a fitting hole through which the receiving part is fitted, and having a plurality of hemispherical lower grooves formed at the lower end; And, a plurality of second plates that are inserted into each of the plurality of lower grooves to support the upper plate in a state in contact with the upper surface of the lower plate, and rotate by frictional force with the upper surface of the lower plate to maintain the position of the upper plate. Ball member; It proposes a base isolation device having an improved restoring force using a ball and a spring, characterized in that it is configured to include.

A seismic isolating device having an improved restoring force using a ball and a spring according to the present invention,

A restoring force that exceeds the elastic force of each spring by gravity applied to the ball member by obliquely forming the bottom surface of the center groove of the lower plate that comes into contact with the ball member inserted into the inner groove at the bottom of the damping device with a plurality of horizontal springs connected to the side. An effect that can form

As an additional effect of the above effect, an effect of providing a seismic isolator having the same or similar vibration attenuation performance as a conventional seismic isolating device but having a smaller size is generated.

1 is a perspective view showing a lower plate of a seismic isolator having an improved restoring force using a ball and a spring according to the present invention.
2 is a perspective view showing a state in which a damping device is provided on a lower plate of a base isolating device having an improved restoring force using a ball and a spring according to the present invention.
3 is an exemplary view showing a state in which a curved groove is formed in a lower plate of a seismic isolating device having an improved restoring force using a ball and a spring according to the present invention.
4(a) and 4(b) are exemplary views showing a process of inserting and fastening a magnetic material into a seismic isolating device having an improved restoring force using a ball and a spring.
5(a) and 5(b) are exemplary views showing a state in which an upper plate of a seismic isolating device having an improved restoring force using a ball and a spring according to the present invention is placed on the top of the lower plate.
6(a) to 6(c) are cross-sectional views showing an operating embodiment of a base isolation device having an improved restoring force using a ball and a spring according to the present invention.

The present invention relates to a seismic isolating device having an improved restoring force 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 at the upper end and a support part 113 supported by one or more vertical springs 112 is provided at the upper end, and a hemispherical inlet groove 114 is formed at the lower end, and the central groove 101 A plurality of horizontal springs 115 connected to the inner wall of the attenuation device 110 connected to the side at a predetermined interval; Supports the attenuating device 110 in a state of being inserted into the inlet groove 114 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 first ball member 120 to make; An upper plate 130 in which a fitting hole 131 into which the support part 113 is fitted is formed through the upper and lower ends, and a plurality of hemispherical lower grooves 132 are formed at the lower end; And, it is inserted into each of the plurality of lower grooves 132 to support the upper plate 130 in a state in contact with the upper surface of the lower plate 100, but rotated by a friction force with the upper surface of the lower plate 100 And a plurality of second ball members 140 for maintaining the position of the upper plate 130; It relates to a seismic isolating device having an improved restoring force using a ball and a spring, characterized in that it comprises a.

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 is formed to be opened downward at the lower end of the lower plate 100. It is fitted into the above lower 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 115 connected to the inner wall side of the central groove 101 are connected to the side surfaces at regular intervals, and the original stopped despite the reciprocating movement of the lower plate 100 due to vibration. It is structured to maintain its state as much as possible.

The plurality of horizontal springs 115 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 FIG. 2, the support part 113 provided on the upper side of the attenuating device 110 is formed or provided on the lower part of an object and is configured to support the object, and is generally As a component that supports a specific part, referred to as, etc., the lower end is supported by one or more vertical springs 112, and a fixing groove 111 that is open upward is formed at the upper end, and is referred to as a leg or a stand of an object. So that the parts can be inserted.

At this time, the entrance of the fixing groove 111 may be configured to have a shape of one of various shapes such as a circle or a square to support a leg or a pedestal suitable for the shape.

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 upper plate 130 directly supports the lower end of the object together with the supporting portion 113 can do.

Therefore, the height of the upper surface of the support part 113 and the height of the upper surface of the upper plate 130 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 upper plate 130 It is preferable, but is not necessarily limited to this type.

In addition, the hemispherical inner groove 114 formed downwardly at the lower end of the attenuation device 110 is a space in which a part of the first ball member 120 is inserted, and the inner recessed groove 114 is (114) It is preferable that a structure capable of ensuring smooth rotation by minimizing the flow of the first ball member 120 in the interior and minimizing a contact surface with the first ball member 120 is formed.

That is, the inner structure of the inner groove 114 may be formed in the same or similar structure as the inner structure of a known ball mouse, etc., but the depth of the inner groove 114 is less than the diameter of the first ball member 120 It is formed in a short length, so that only a part of the first ball member 120 is inserted into the recessed groove 114, and the other part protrudes downward from the attenuation device 110.

Accordingly, the first 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 reciprocates despite the reciprocating movement of the lower plate 100. And keep the original 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 first 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 It is preferable to sufficiently support the weight of an object or the like supported by the seismic isolating device of the present invention.

In addition, the first 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 is arranged along the bottom surface of the central groove 101. When a certain height is raised, an outer layer made of an elastic material such as synthetic rubber and an inner layer made of a metal material such as aluminum may be divided into an outer layer made of an elastic material such as synthetic rubber so that the restoring force for returning to the original position may be improved.

In addition, as shown in FIG. 3, the seismic isolating device having an improved restoring force using a ball and a spring according to the present invention is of the attenuation device 110 by the first ball member 120, which is normally spherical. In order to prevent flow, 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 first ball member 120 in contact with the bottom surface of the center groove 101 can fit or be inserted, and accordingly the attenuation The first ball member 120 may be fixed to the center of the bottom surface of the central groove 101 when no external force is applied to the device 110 due to an earthquake or the like, and when an external force is generated due to an earthquake, the first ball The member 120 is configured to be separated from the curved groove 102.

In addition, as described above, the first 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 a magnetic body 103 having a magnetic force. ), it is possible to further improve the restoring force by the spring, and when the center of the central groove 101 in which the curved groove 102 is formed is composed of a magnetic material 103, the restoring force by the spring may be improved. In addition to the existing effect, an effect of preventing the flow of the attenuating device 110 by the first ball member 120 is generated in addition.

Therefore, compared to the conventional seismic isolator that can only form a restoring force corresponding to the elastic force of each spring, the seismic isolating device of the present invention is applied to the elastic force of each spring and the gravitational force due to the inclined bottom surface and the magnetic body 103 It is a configuration in which the effect of forming a restoring force of a magnitude corresponding to the resultant force added by the magnetic force is generated.

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.

In addition, when the central portion of the central groove 101 is composed of a magnetic body 103 having a magnetic force, the magnetic body 103 is manufactured separately from the lower plate 100 and then assembled into a lower plate ( 100), and as a method of placing the magnetic body 103 inside the central groove 101, a method of inserting and fastening the magnetic body from the upper side of the center groove 101 to the lower side or FIG. 4(a) And a method of inserting and fastening upward from the lower end of the lower plate 100 as shown in FIG. 4(b) may be used.

Accordingly, a magnetic material groove that can be inserted and fastened in a manner that fits the magnetic material 103 may be formed in the center of the central groove 101, and a magnetic material is inserted and fastened from the bottom to the top in the lower plate 100. An inner hole for the can be formed.

In addition, as shown in Figs. 5(a) and 5(b), the upper plate 130 has the same shape as the lower plate 100, that is, one of various shapes such as a circle or a square. As a plate-shaped member that is horizontally placed on the upper end of the lower plate 100, a fitting hole 131 penetrating the upper and lower ends is formed in the center so that the support part 113 can be fitted.

Therefore, the upper plate 130 firmly supports the support part 113 in the lateral direction and guides the support part 113 to move up and down only in the vertical direction, according to the shape of the lower part of the object, etc. Together with the support part 113, the lower end of the object may be directly supported, or the lower end of the object may be directly supported.

The plurality of lower grooves 132 are grooves of the same or similar shape as the internal grooves 114, and are configured so that each of the plurality of second ball members 140 can be inserted, and the interior of the internal groove 114 As the structure minimizes the flow of the first ball member 120 and at the same time minimizes the contact surface with the first ball member 120 to ensure smooth rotation of the first ball member 120, the lower groove 132 It is preferable that the internal structure of the second ball member 140 is configured to minimize the flow of the second ball member 140 and at the same time minimize the contact surface with the second ball member 140 to ensure smooth rotation of the second ball member 140 .

Accordingly, the second ball member 140 supports the upper plate 130 and at the same time, the upper plate 130 in a state located above the lower plate 100 is moved in spite of the reciprocating movement of the lower plate 100. And keep the original stationary state as much as possible.

In this case, the fact that the upper plate 130 maintains the original stopped state as much as possible despite the reciprocating movement of the lower plate 100 does not necessarily mean that the upper plate 130 is completely stopped, and the upper plate It is meant to include a state in which (130) is stopped and a state in which it vibrates within a certain range.

In addition, the second ball member 140 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 upper plate 130 It is preferable to sufficiently support the weight of an object supported by the seismic isolator of the present invention, and the attenuation member 110 and the upper plate 130 are originally An embodiment of the present invention that maintains the stationary state as much as possible is shown in detail in FIGS. 6(a) to 6(c).

In addition, the second ball member 140 has 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 vibration due to friction with the upper surface of the upper plate 130 can be attenuated. It can be configured separately.

In addition, as a curved groove 102 having a semi-elliptical cross section is formed in the center of the central groove 101, a part of each of the plurality of second ball members 140 is also at the upper end of the lower plate 100. An upper groove that can be fitted or inserted may be formed, and accordingly, the position of the second ball member 140 is fixed at a designated position when an external force due to an earthquake or the like does not work, and when an external force occurs due to an earthquake, etc. The second ball member 140 is configured to be separated from the upper groove formed on the upper end of the lower plate 100.

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.

100: lower plate
101: center groove 102: curved groove
103: magnetic body
110: attenuation device
111: fixing groove 112: vertical spring
113: base 114: internal groove
115: horizontal spring
120: first ball member
130: upper plate
131: fitting hole 132: lower groove
140: second ball member

Claims (4)

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 at the upper end and a support part 113 supported by one or more vertical springs 112 is provided at the upper end, and a hemispherical inlet groove 114 is formed at the lower end, and the central groove 101 A plurality of horizontal springs 115 connected to the inner wall of the attenuation device 110 connected to the side at a predetermined interval;
Supports the attenuating device 110 in a state that is inserted into the inlet groove 114 and in contact with the bottom surface of the lower plate 100, but rotates by the frictional force with the bottom surface and maintains the position of the attenuation device 110 A first ball member 120 to make;
An upper plate 130 in which a fitting hole 131 into which the support part 113 is fitted is formed through an upper end and a lower end, and a plurality of hemispherical lower end grooves 132 are formed at the lower end;
It is inserted into each of the plurality of lower grooves 132 to support the upper plate 130 in a state in contact with the upper surface of the lower plate 100, but rotated by frictional force with the upper surface of the lower plate 100 A plurality of second ball members 140 for maintaining the position of the plate 130; Base isolation device having an improved restoring force using a ball and a spring, characterized in that it comprises a.
The method of claim 1,
The central groove 101,
The entrance is formed in a circular shape,
The inner wall to a certain depth is formed vertically,
The bottom surface constituting the lowermost end is formed inclined downward toward the center,
A base isolating device having an improved restoring force using a ball and a spring, characterized in that it has a U-shaped cross-sectional structure.
The method of claim 1,
In the center of the central groove 101,
A seismic isolation 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 first ball member 120,
The whole is made of iron,
The central portion of the central groove 101,
A seismic isolating device having an improved restoring force using a ball and a spring, characterized in that it is composed of a magnetic body (103).

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