Seismic isolation device equipped with a ball-type actuator

Abstract

The present invention relates to a seismic isolation device equipped with ball-type operating bodies that can prevent, with a simple configuration, the detachment of balls during the seismic isolation process and the resulting loss of function or failure of the device. According to the present invention, the present invention includes an upper panel 31 on which an object to be protected 10 is mounted and on which a certain size of upper rolling groove 33 is formed on the bottom surface, a lower panel 32 provided on the ground side corresponding to the upper panel 31 and on which a lower rolling groove 34 facing the upper rolling groove 33 is formed on the top surface, and a spherical ball operating body 35 that is located on the upper rolling groove 33 and the lower rolling groove 34 and can roll. Of the upper rolling groove 33 and the lower rolling groove 34, at least the lower rolling groove 34 has a groove. The seismic isolation device is provided with a ball-shaped actuator including a central rolling surface 36 curved at a constant curvature so as to be expanded from the center of the central rolling surface 36, a peak line 37 formed at the upper end of the periphery of the central rolling surface 36, a curved rolling surface 38 formed to be horizontal from the peak line 37 or to extend downward from the peak line 37 so as to be curved with respect to the central rolling surface 36, and a separation prevention protrusion 39 formed at a constant height on the outer periphery in contact with the periphery of the curved rolling surface 38.

Description

Technical Field

[0001] The present invention relates to a seismic isolation device provided with a ball-type actuator, and more particularly, to a seismic isolation device provided with a ball-type actuator that can prevent the separation of balls during the seismic isolation process and the loss or failure of the device functions associated therewith by means of a simple structure.

Background Art

[0002] Generally, a seismic isolation device provided to protect important objects or facilities inside a building, such as non-structural elements like devices, excluding structural elements such as the foundation or shear walls of a building, has an actuator that performs a seismic isolation operation interposed between a lower plate that generally contacts the ground and an upper plate on which the object to be protected is mounted. This actuator usually uses springs, balls, or LM guides, etc.

[0003] In such a seismic isolation device, a seismic isolation device provided with a ball-type actuator forms rolling grooves corresponding to each other on the lower plate and the upper plate, and spherical balls made of steel material are contained on the rolling grooves. Conventionally, since there is no separate configuration for preventing separation on the upper plate and the lower plate itself or on the rolling grooves, there is a risk that the seismic isolation function of the device is lost or the device itself fails due to the separation of the balls from the upper plate or the lower plate during the operation process of the device. In some cases, paying attention to the above problems, separate separation prevention means are further attached to the upper plate and the lower plate, which not only complicates the configuration of the device but also causes manufacturing troubles such as assembly.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The present invention is for solving the above-described problems. Without adding a separate configuration, the present invention can prevent the separation of balls during the seismic isolation process, the disappearance of the function of the device associated therewith, and failures, etc., by means of a simple groove structure, maintain a compact state of the device itself with a simple structure, and eliminate the troublesomeness of manufacturing and assembling the device. The present invention provides a seismic isolation device provided with a ball-type actuator.

Means for Solving the Problems

[0005] According to the features of the present invention, an upper panel 31 on which an object 10 to be protected is mounted at the upper part and an upper rolling groove 33 of a certain size is formed on the bottom surface, a lower panel 32 provided on the ground side corresponding to the upper panel 31 and having a lower rolling groove 34 formed on the upper surface so as to face the upper rolling groove 33, a spherical ball actuator 35 that is internally provided on the upper rolling groove 33 and the lower rolling groove 34 and is capable of rolling, are included, Among the upper rolling groove 33 and the lower rolling groove 34, at least the lower rolling groove 34 has a central rolling surface 36 that is curved with a certain curvature so as to be extended from the center part of the groove, a peak line 37 formed at the upper end of the periphery of the central rolling surface 36, a bending rolling surface 38 that becomes horizontal from the peak line 37 or extends downward from the peak line 37 so as to bend with respect to the central rolling surface 36, A seismic isolation device provided with a ball-type actuator is provided, which includes a separation prevention protrusion 39 that is formed at a certain height on the outer periphery in contact with the peripheral part of the bending rolling surface 38 and prevents the separation of the ball actuator 35.

[0006] According to another feature of the present invention, a seismic isolation device provided with a ball-type actuator is provided, characterized in that a ring-shaped ball guide 41 is coupled to the ball actuator 35.

[0007] According to still another feature of the present invention, there is provided a seismic isolation device provided with a ball-type actuator characterized in that an adhesive base pad 21 made of an elastic material is provided on the bottom surface of the lower panel 32.

[0008] According to still another feature of the present invention, there is provided a seismic isolation device provided with a ball-type actuator characterized in that an elastic coating layer 42 made of a resin material is formed on the surface including the anti-separation protrusion 39 on the upper rolling groove 33 and the lower rolling groove 34.

[0009] According to still another feature of the present invention, there is provided a seismic isolation device provided with a ball-type actuator characterized in that the upper panel 31 and the lower panel 32 are interconnected by an elastic band 50.

[0010] According to still another feature of the present invention, there is provided a seismic isolation device provided with a ball-type actuator characterized in that a partition plate 53 is provided on the upper panel 31 at a certain height with a distance therebetween.

[0011] According to still another feature of the present invention, there is provided a seismic isolation device provided with a ball-type actuator characterized in that the partition plate 53 is provided on an elastic pole 54 standing upright on the upper panel 31 at a certain height.

[0012] According to still another feature of the present invention, there is provided a seismic isolation device provided with a ball-type actuator characterized in that the central rolling surface 36 is formed such that the thickness of the elastic coating layer 42 increases from the center toward the outer periphery.

Advantages of the Invention

[0013] As described above, according to the present invention, the peak line 37 is formed at the upper end of the peripheral edge of the central rolling surface 36 where the shapes of the upper rolling groove 33 and the lower rolling groove 34, which are formed so that the spherical ball actuator 35 rolls, are curved with a constant curvature, and a bending rolling surface 38 with a different curvature from that of the central rolling surface 36 is formed on the outer periphery of the peak line 37. As a result, without increasing the height and volume of the upper panel 31 and the lower panel 32 themselves and without forming a high peripheral protrusion of the rolling surface, the height of the anti-separation protrusion 39 becomes relatively high, preventing the separation of the ball actuator 35. Furthermore, the rolling surface that bends before and after the peak line 37 can not only slow down the moving speed of the ball actuator 35, but also has the advantage of preventing the separation or reduction of the seismic isolation function of the ball actuator 35.

[0014] Also, in the ball actuator 35 of the present invention, by coupling the ring-shaped ball guide 41, the weight and material of the ball guide 41 itself serve as a kind of weight and bumper, not only slowing down the speed of the movement and return to the original state of the ball actuator 41, but also having the advantage of preventing the ball actuator 35 from being hit or separated, especially during the occurrence of a long-period earthquake having a period exceeding 1 second or an earthquake that causes a large displacement in which the upper panel 31 is lifted.

[0015] In this connection, during the execution of the seismic isolation function, the upper panel 31 may be lifted. At this time, the ball actuator 35 of the present invention not only moves in a state where the ball guide 41 is in surface contact with the rolling surface, but also, by forming an elastic coating layer 42 on the rolling surface, the return speed flowing down along the central rolling surface 36 during the return process of the ball actuator 35 becomes slower. During this process, when the upper panel 31 descends, the ball actuator 35 is confined within the upper panel 31 without deviating from the range of the upper panel 31 or being hit by the upper panel 31, and has the advantage of enabling normal rolling.

[0016] In addition, the ball guide 41 of the present invention can contact and support on the rolling surface during the operation process of the ball actuator 35. When only the ball actuator 35 itself is provided, it can prevent the excessive slip phenomenon caused by point contact on the rolling surface, and has the advantage of enabling stable running and the accompanying good seismic isolation function.

[0017] In addition, in the present invention, by forming the elastic coating layer 42 as a whole including the anti-separation protrusion 39 on the rolling groove, it can prevent excessive slip during the rolling process of the ball actuator 35, etc., and has the advantage of maximizing the buffering effect with the ball guide 41. An adhesive base pad 21 made of an elastic material is attached to the bottom surface of the lower panel 32 to prevent the buffering and slipping of the device at the installation location, and has the advantage of preventing the detachment and lifting of the device due to vertical vibration, etc., and maintaining a stable support state.

[0018] In addition, in the present invention, by mutually connecting the upper panel 31 and the lower panel 32 with the elastic band 50, it is possible to prevent the separation of the upper panel 31 and the lower panel 32 and the detachment of the ball actuator 35 due to an earthquake that vibrates in the horizontal or vertical direction. A partition plate 53 is provided on the upper panel 31 to prevent the load from being directly transmitted to the elastic band 50, and it can be installed in a state where it is not hindered by expansion and contraction operations, etc. When providing the partition plate 53, etc., it is provided on the upper panel 31 by the elastic pole 54, and has the advantage of being able to elastically support and buffer the load of the object to be protected 10, etc.

[0019] In addition, the central rolling surface 36 of the present invention has the advantage that the thickness of the elastic coating layer 42 can be gradually increased from the center to the outer periphery, so that the moving distance of the ball actuator 35 can be made smaller compared to the seismic intensity during the occurrence of a major earthquake.

Brief Description of the Drawings

[0020]

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DETAILED DESCRIPTION OF THE INVENTION

[0021] The objects, features, and advantages of the present invention described above will become more apparent from the following detailed description. Hereinafter, preferred embodiments of the present invention will be described based on the accompanying drawings as follows.

[0022] FIGS. 1 to 11 illustrate various embodiments of the present invention. As shown in FIG. 1, the seismic isolation device 20 of the present invention is configured to carry a protected object 10 such as an important equipment or the article itself, or a cabinet for storing the same, and protect it from external impacts such as earthquakes. This is achieved by arranging one or a plurality of seismic isolation drive units 30 in a substantially square panel shape so as to stably support the protected object 10 on the bottom surface of the protected object. In the case of a plurality of seismic isolation drive units 30, they are integrated in a state of being interconnected by a connecting member (40).

[0023] In order to provide such a surface vibration drive unit 30 of the present invention, a base pad 21 is preferentially laid on the ground, and the seismic isolation drive unit 30 is provided on the base pad 21. The surface vibration drive unit 30 includes a lower panel 32 fixedly installed on the base pad 21 so as to be located on the bottom surface side of the installation location, and an upper panel 31 on which a protection object 10 is mounted corresponding to the lower panel 32. The base pad 21 can also be provided on the ground side with the lower panel 32 in a state of being adhesively bonded to the bottom surface of the lower panel 32 first.

[0024] The detailed configuration including such a seismic isolation drive unit of the present invention will be described as follows with reference to FIGS. 2 to 4. As shown in FIGS. 2 to 4, the upper panel 31 and the lower panel 32 are arranged in a state of being vertically opposed to each other with the same size so as to correspond to each other. A circular upper rolling groove 33 is formed on the bottom surface of the upper panel 31, and a lower rolling groove 34 of the same size is formed on the upper surface of the lower panel 32 so as to face the upper rolling groove 31. A spherical ball actuator 35 is incorporated on the upper rolling groove 33 and the lower rolling groove 34 of the upper panel 31 and the lower panel 32.

[0025] Depending on such a seismic isolation drive unit 30, the ball actuator 35 can roll, and the upper panel 31 can move relative to the lower panel 31 provided on the ground side. This is operated so that the protection object 10 mounted on the upper panel 31 maintains a state with less shaking against the movement of the ground when an impact such as an earthquake occurs.

[0026] Here, the lower panel 32 is provided in a state of being seated on the base pad 21. The base pad 21 is made of an elastic material or the like, and is added not only to stably support the seismic isolation drive unit 30 on the ground and maintain a firm support state by preventing slips such as slipping, but also to be made to have adhesiveness itself or to adhere the lower panel 32 with a separate adhesive component, thereby preventing the device from being lifted by vertical vibration or the like and maintaining a stable support state.

[0027] On the one hand, the upper rolling groove 33 and the lower rolling groove 34 of the present invention are formed with a central rolling surface 36 that expands from the center of the groove to a certain area, and a bending rolling surface 38 that is bent at the periphery of the central rolling surface 36. The central rolling surface 36 is formed in a concave shape so as to curve with a curvature that becomes upward from the center toward the outer periphery. The bending rolling surface 38 is formed in a state of being bent with respect to the central rolling surface 36. At this time, on the boundary line between the central rolling surface 36 and the bending rolling surface 38, a circular linear peak line 37 is formed at the upper end of the periphery of the central rolling surface 36. The bending rolling surface 38 is formed so as to extend horizontally from the peak line 37 or downward at a fine angle of about 1 degree.

[0028] In addition, on the periphery of the upper rolling groove 33 and the lower rolling groove 34, a detachment prevention protrusion 39 with a certain height is formed on the outer periphery of the bending rolling surface 38. The width of the bending rolling surface 38 or the horizontal distance L between the upper end of the detachment prevention protrusion 39 from the peak line 37 is formed relatively large compared to the radius R of the ball rolling element 35, so that the ball rolling element 35 can also be positioned on the bending rolling surface 38 beyond the peak line 37.

[0029] According to such a present invention, not only can the acceleration of the ball rolling element 35 be suppressed and the moving speed be slowed down during the process before and after the ball rolling element 35 exceeds the peak line 37 during the seismic isolation operation process, but also the seismic isolation operation can be stably performed. This has the advantage of embodying a compact device in that the height of the detachment prevention protrusion 39 is increased to effectively prevent the detachment of the ball rolling element 35 even without increasing the volume of the upper panel 31 and the lower panel 32 themselves.

[0030] Also, as shown in FIGS. 5(a) and 5(b), a ring-shaped ball guide 41 can be coupled to the ball actuator 35. The ball guide is horizontally coupled on the outer periphery of the ball actuator such that a part of the upper and lower portions of the ball actuator 35 is exposed. Depending on the ball guide 41, during the operation of the ball actuator 35, one side or the bottom surface can have additional line or surface contact at the periphery of the ball actuator 35. When only the ball actuator 35 is provided, it is provided in a state of point contact on the upper rolling groove 33 and the lower rolling groove 34, and there is a risk of excessive slip during operation. In this embodiment, however, the ball guide 41 makes multi-point or surface contact on the rolling surface, enabling stable operation of the ball actuator 35 and stable traveling during the forward or return process.

[0031] Also, even when such a ball guide 41 is attached, due to its own elastic contraction or the like, during the seismic isolation process, the ball actuator 35 can be positioned on the curved rolling surface 38 beyond the peak line 37. At this time, the ball guide 41 exerts a damping effect by contacting the anti-separation protrusion 39 to prevent the separation of the ball actuator 35 and can stably slow down the speed at which the ball actuator 35 returns to the central rolling surface 36 side. An elastic coating layer 42 is formed on the upper rolling groove 33, the lower rolling groove 34, the central rolling surface 36, the curved rolling surface 38, and the anti-separation protrusion 39 with an elastic material such as urethane. Such an elastic coating layer 42 and the aforementioned ball guide 41 exert a relaxation effect against slippage, impact, etc., prevent excessive slippage during the movement process of the ball actuator 35, slow down the movement and return speed, etc., and enable a stable seismic isolation operation. At this time, the elastic coating layer 42 applied to the anti-separation protrusion 39 can relieve the impact when the ball actuator 35 hits and improve the seismic isolation characteristics.

[0032] In connection with this, the case where the upper panel 31 is lifted during the earthquake occurrence process will be described with reference to FIG. 6 as follows. As shown in FIGS. 6(a) and (b), when the ball actuator 35 moves on the central rolling surface 36 and the bending rolling surface 38 due to horizontal or vertical vibration, the upper panel 31 may be lifted. At this time, the ball actuator 35 of the present invention is not only moved in a state where the ball guide 41 is in surface contact with the rolling surface, but also an elastic coating layer 42 is formed on the rolling surface, so that the return speed flowing down along the central rolling surface 36 during the return process of the ball actuator 35 becomes slower. During this process, when the upper panel 31 descends, the ball actuator 35 either deviates from the range of the upper panel 31 or is confined within the upper panel 31 without hitting the ball actuator 35, enabling normal rolling.

[0033] Also, as shown in FIGS. 7(a) and (b), when manufacturing the upper rolling groove 33 and the lower rolling groove 34 as described above into a curved surface shape composed of the central rolling surface 36, the bending rolling surface 30, and the peak line 37 as described above, after forming a concave groove 44 by bending a steel plate 43 with a certain curvature, the coating thickness is made different in the process of forming the elastic coating layer 42 by applying urethane or the like as described above on the concave groove 44 of the steel plate 43, so as to form the central rolling surface 36, the peak line 37, and the bending rolling surface 38 as described above. Or when forming the concave groove 44 on the steel plate 43 itself, after forming the central rolling surface 36, the peak line 37, and the bending rolling surface 38 by molding, the elastic coating layer 42 can also be formed uniformly.

[0034] On the other hand, the upper panel 31 and the lower panel 32 can be integrally coupled by an elastic band 50 so as to prevent separation of the device due to an earthquake or the like that vibrates up and down. This will be described with reference to FIGS. 8 and 9 as follows.

[0035] As shown in FIGS. 8(a) and 8(b), the upper panel 31 and the lower panel 32 are provided to be integrally wrapped by an elastic band 50 made of an expandable and contractible material in a strip shape having a certain width. The elastic band 50 is in close contact with the upper panel 31 and the lower panel 32 in a state of surface contact. At this time, the elastic band 50 may be provided to wrap the upper panel 31 and the lower panel 32 in a straight line shape. Band grooves 51 into which the elastic band 50 can be inserted are formed on the surfaces of the upper panel 31 and the lower panel 32, preventing the protected object 10 mounted on the upper panel 31 and the lower panel 32 in contact with the ground from being pushed, thereby preventing the expansion and contraction operation of the elastic band 50 from being reduced.

[0036] Here, the band grooves 51 can be easily manufactured and formed by adhering pads having a thickness equal to or greater than that of the elastic band 50 at intervals on the left and right. At this time, if an expandable and contractible material is used for the pads, a buffering effect against load can be further imparted.

[0037] Also, as shown in FIGS. 9(a) and 9(b), the elastic band 50 may be provided not only to integrally wrap the upper panel 31 and the lower panel 32 in a cross shape in addition to the aforementioned straight line shape, but also, if necessary, band hooks 52 may be provided on the side surfaces of the upper panel 31 and the lower panel 32, and the elastic band 50 may be provided on the band hooks 52. Depending on such an elastic band 50, regardless of short-period or long-period earthquakes, not only can the close contact feeling between the upper panel 31 and the lower panel 32 be increased and the internal ball working body 35 be prevented from coming off, but also the seismic isolation function of the device can be stably performed by this.

[0038] Also, as shown in FIG. 10, a partition plate 53 may be further provided on the upper surface of the upper panel 31 at a certain height with a distance therebetween. However, depending on the partition plate 53, it may be necessary to raise the installation position of the object 10 to be protected, or it can be added according to other installation conditions. At this time, the partition plate 53 may be provided by spacers of a certain length arranged at the four corners of the upper panel 31. The spacers are provided with elastic poles 54 of a certain length and are provided so as to be able to exhibit a buffering effect.

[0039] Here, the elastic pole 54 may be formed by forming an elastic body 55 with a resin of an elastic material, and bolts 56 and nuts 57 may be integrally double-injected at the upper and lower ends of the elastic body 55. Such an elastic pole 54 can be easily screwed and fastened to the upper panel 31 and the partition plate 53 with bolts 56 and nuts 57. Depending on the elastic body 55, the impact caused by the load of the object 10 mounted on the partition plate 53 can be mitigated.

[0040] Also, as shown in FIG. 11, the thickness of the elastic coating layer 42 can be gradually increased from the center to the outer periphery of the central rolling surface 36. Thereby, when a large earthquake occurs, the distance that the ball actuator 35 moves can be made smaller compared to the seismic intensity. At this time, the coating start point of the elastic coating layer 42 can be selectively applied near the center of the rolling surface. In such a case, the elastic coating layer 42 may not be partially applied to the center of the rolling surface.

[0041] The present invention described above is not limited by the foregoing embodiments and the accompanying drawings, and it will be apparent to those having ordinary knowledge in the technical field to which the present invention pertains that various substitutions, modifications, and changes are possible within the scope not departing from the technical idea of the present invention.

Claims

1. An upper panel (31) with a protected object (10) mounted on its upper part and an upper rolling groove (33) of a certain size formed on its bottom surface, A lower panel (32) provided on the ground side corresponding to the upper panel (31), with a lower rolling groove (34) formed on its upper surface so as to face the upper rolling groove (33), A spherical ball actuator (35) that is internally located on the upper rolling groove (33) and the lower rolling groove (34) and is capable of rolling, and includes, Among the upper rolling groove (33) and the lower rolling groove (34), at least the lower rolling groove (34) has, A central rolling surface (36) that curves with a certain curvature so as to expand from the center of the groove, A peak line (37) formed at the upper end of the periphery of the central rolling surface (36), A bending rolling surface (38) that is horizontal from the peak line (37) or extends downward from the peak line (37) so as to bend with respect to the central rolling surface (36), An anti-separation protrusion (39) that is formed at a certain height on the outer periphery in contact with the peripheral part of the bending rolling surface (38) and prevents the separation of the ball actuator (35), and includes, The width of the bending rolling surface (38) or the horizontal distance between the peak line (37) and the upper end of the anti-separation protrusion (39) is formed relatively large compared to the radius of the ball actuator (35), and the ball actuator (35) is formed so as to be located on the bending rolling surface (38) beyond the peak line (37). A seismic isolation device equipped with a ball-type actuator.

2. The ball actuator (35) is characterized in that a ring-shaped ball guide (41) is coupled thereto. The seismic isolation device equipped with a ball-type actuator according to Claim 1.

3. The bottom surface of the lower panel (32) is provided with an adhesive base pad (21) made of an elastic material. The seismic isolation device equipped with a ball-type actuator according to Claim 1 or 2.

4. An elastic coating layer (42) made of a resin material is formed on the surface including the anti-separation protrusion (39) on the upper rolling groove (33) and the lower rolling groove (34). The seismic isolation device equipped with a ball-type actuator according to Claim 1 or 2.

5. The seismic isolation device provided with the ball-type actuator according to claim 1 or 2, characterized in that the upper panel (31) and the lower panel (32) are coupled to each other by an elastic band (50).

6. The seismic isolation device provided with the ball-type actuator according to claim 1 or 2, characterized in that a partition plate (53) is provided on the upper panel (31) at a certain height with a distance therebetween.

7. The seismic isolation device provided with the ball-type actuator according to claim 6, characterized in that the partition plate (53) is provided on an elastic pole (54) standing upright on the upper panel (31) at a certain height.

8. The seismic isolation device provided with the ball-type actuator according to claim 4, characterized in that the thickness of the elastic coating layer (42) is gradually formed thicker from the center toward the outer periphery on the central rolling surface (36).

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