JP2016003682A - Vibration control structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely control vibration with respect to shaking in different two directions.SOLUTION: A vibration control structure includes a structure body as a target to be vibration-controlled, a first mass body supported by the structure body, a second mass body supported by the first mass body, a first guide mechanism provided between the structure body and the first mass body and moving the first mass body to the structure body in a prescribed direction, and a second guide mechanism provided between the first mass body and the second mass body and moving the second mass body to the first mass body in an orthogonal direction orthogonal to the prescribed direction. The first mass body and the second mass body are relatively displaced to the structure body in the prescribed direction, and only the second mass body is relatively displaced to the structure body in the orthogonal direction.

Description

  The present invention relates to a vibration damping structure.

  TMD (Tuned Mass Damper) configured as a vibration absorber with a structure to be controlled, a mass body (for example, a weight), a restoration mechanism (for example, laminated rubber), and a damping mechanism (for example, a damper) The type is known (for example, refer to Patent Document 1). In such a TMD type damping structure, tuning is performed in advance so that the vibration frequency of the vibration system corresponds to the natural period of the structure to be controlled.

JP 2008-101769 A

  In general, when the structure is a building, the planar shape of the damping target is generally rectangular. In this case, the natural period is different between the short side direction and the long side direction of the rectangle. Therefore, for example, when tuning is performed according to the short side direction, it is not possible to exert a vibration suppression effect with respect to shaking in the long side direction. As described above, it is difficult to suppress vibrations in both the short side direction and the long side direction (two different directions) with a single damping structure.

  The present invention has been made in view of such a problem, and its main object is to surely suppress vibrations in two different directions.

In order to achieve such an object, the vibration damping structure of the present invention includes a structure to be damped, a first mass supported by the structure, and a second mass supported by the first mass. A first guide mechanism that is provided between the structure and the first mass body and moves the first mass body in a predetermined direction with respect to the structure; and the first mass body and the second mass. And a second guide mechanism that moves the second mass body in an orthogonal direction perpendicular to the predetermined direction with respect to the first mass body, wherein the structure is provided in the predetermined direction. The first mass body and the second mass body are relatively displaced with respect to the body, and only the second mass body is relatively displaced with respect to the structure in the orthogonal direction.
According to such a vibration suppression structure, the additional mass can be changed for each of the two different directions, so that it is possible to reliably control the vibrations in the two different directions.

In this vibration damping structure, the structure has a first natural period direction of a first natural period, and a second natural period direction of a second natural period shorter than the first natural period, It is desirable that the predetermined direction is along the first natural period direction and the orthogonal direction is along the second natural period direction.
According to such a vibration suppression structure, it is possible to suppress the vibration of the structure in the first natural period direction and the second natural period direction.

  In this vibration damping structure, the structure, a restoring mechanism that restores the relative positional relationship between the first mass body and the second mass body, the relative displacement in the predetermined direction, and the orthogonal direction It is desirable to provide a damping mechanism that damps vibration due to relative displacement of the.

The vibration control structure further includes a frame that is fixed to the structure and that forms an upper space on the second mass body, and the restoration mechanism and the damping mechanism are provided in the upper space. It is desirable to provide
According to such a vibration control structure, the installation area can be reduced.

  In this vibration damping structure, the restoring mechanism may be a laminated rubber.

  In this vibration damping mechanism, the damping mechanism may be a damper.

  According to the present invention, it is possible to reliably control vibrations in two different directions.

1A to 1C are diagrams showing a rolling support device of the present embodiment. 1A is a top view, FIG. 1B is an AA sectional view of FIG. 1A, and FIG. 1C is a BB sectional view of FIG. 1A. 2A to 2C are explanatory views showing a support structure using the rolling support device of the present embodiment. 2A is a cross-sectional view along the x direction, FIG. 2B is a cross-sectional view along the y direction, and FIG. 2C is a top view. 3A to 3C are explanatory diagrams of the TMD damping structure of the present embodiment. 3A is a cross-sectional view along the x direction, FIG. 3B is a cross-sectional view along the y direction, and FIG. 3C is a top view.

=== Embodiment ===
<< About the rolling bearing device >>>>
Drawing 1A-Drawing 1C are figures showing an example of a rolling support device of this embodiment. 1A is a top view (a view seen through the upper part including the upper rolling plate 10), FIG. 1B is a cross-sectional view taken along line AA in FIG. 1A, and FIG. 1C is a cross-sectional view taken along line BB in FIG. As shown in the figure, the x direction, the y direction, and the z direction are defined. The z direction is a vertical direction, and the x direction and the y direction are two directions orthogonal to each other on a plane (horizontal plane) perpendicular to the z direction.

  The rolling support device of this embodiment includes a pair of upper and lower rolling plates 10 (corresponding to plate members), a roller 20 (corresponding to rolling elements), and a retainer 30 (corresponding to a cage). The retainer 30 is provided with a pinion 40, and the rolling plate 10 is provided with a rack 50.

  The pair of upper and lower rolling plates 10 are provided so as to face each other between structures to be seismically isolated. Further, the surface on the opposite side (hereinafter also referred to as a rolling surface) is a surface in contact with the roller 20, and a rack 50 described later is provided on the rolling surface.

  The roller 20 is a cylindrical member, and is arranged such that the central axis of the cylinder is parallel to the y direction. In this example, five rollers 20 are arranged in a line in the x direction. These rollers 20 are in contact with the pair of upper and lower rolling plates 10 to support vertical loads such as structures and weights, and respond to relative displacement in the x direction of the pair of upper and lower rolling plates 10. Rolling in the x direction. Note that the number and arrangement of the rollers 20 are not limited to this example. For example, five or more rollers 20 may be provided in the x direction, or provided in multiple rows (for example, two rows) in the y direction. May be. Moreover, the roller 20 may not be plural (one may be sufficient). Further, the arrangement relationship between the x direction and the y direction may be reversed (that is, the central axis of the roller 20 may be parallel to the x direction). In this case, the roller 20 rolls in the y direction according to the relative displacement of the pair of upper and lower rolling plates 10 in the y direction.

  The retainer 30 is a plate-like member and is provided with openings that accommodate the five rollers 20. The retainer 30 holds the five rollers 20 between the pair of upper and lower rolling plates 10 so as to be able to roll, and also holds an interval between the rollers 20. The retainer 30 is provided with a pinion 40 and a pinion shaft 40a.

  The pinion shaft 40 a is a rotation shaft of the pinion 40 and is provided in the retainer 30 in parallel with the y direction (in other words, the central axis of the roller 20).

  The pinion 40 is a gear-shaped member provided in the retainer 30 and rotates around a pinion shaft 40a (corresponding to a rotation shaft). In this example, four pinions 40 are arranged side by side in the x direction on one side in the y direction from the row of the rollers 20 of the retainer 30.

  The number and arrangement state of the pinions 40 are not limited to this example. For example, the number of pinions 40 may be 3 or less, or 5 or more. Moreover, the pinion 40 may be provided on both sides in the y direction so as to sandwich the roller 20. Moreover, the pinion 40 and the roller 20 may be located in a position separated in the x direction.

  The rack 50 is provided on each rolling surface of the pair of upper and lower rolling plates 10. More specifically, the rack 50 is provided on each rolling surface of the pair of upper and lower rolling plates 10 so as to mesh with the pinion 40 (along the x direction).

  With the above configuration, when relative displacement in the x direction occurs in the upper and lower rolling plates 10 due to an earthquake or the like, each roller 20 rolls in the x direction while supporting a vertical load. At this time, relative displacement in the x-direction position also occurs in the upper and lower racks 50, and the pinions 40 meshed with the racks 50 rotate. For this reason, the position of the retainer 30 (the position in the x direction) is controlled to an intermediate position between the upper and lower rolling plates 10.

  If a sphere (steel ball) is used for rolling support, the contact between the sphere and the rolling plate 10 becomes a point contact, and the stress at the contact portion becomes very large. As a result, there is a risk of local wear or plastic deformation. Further, when the displacement is repeated many times, there is a possibility that slip occurs between the roller 20 and the rolling plate 10 and the position of the retainer 30 is gradually shifted (displaced). Further, when a linear guide is used, if a large deformation is repeated many times, the lubricating oil may be depleted and maintenance may be required.

  On the other hand, since the rolling support device of this embodiment uses the cylindrical roller 20, the contact with the rolling plate 10 becomes a line contact, and local wear and plastic deformation can be suppressed. Moreover, since the rolling support apparatus of this embodiment is equipped with the rack and pinion (rack 50 and pinion 40), it can prevent the slip between the roller 20 and the rolling plate 10, and the position of the retainer 30 can be adjusted. It can be controlled to an intermediate position between the upper and lower rolling plates 10. That is, the position shift of the retainer 30 can be suppressed. As a result, no misalignment occurs, so maintenance is not required, and durability can be improved.

<< About the support structure >>>>
2A to 2C are explanatory diagrams illustrating an example of a support structure using the rolling support device of the present embodiment. 2A is a cross-sectional view along the x direction, FIG. 2B is a cross-sectional view along the y direction, and FIG. 2C is a top view.

  The support structure of the present embodiment is formed by stacking the rolling support device of FIG. 1 in two stages in the vertical direction so that the rolling directions are orthogonal to each other, and includes a base frame 100, an intermediate frame 200, and an upper frame 300. ing.

  The foundation frame 100 is provided at the lowermost part of the support structure of the present embodiment. On the upper surface of the foundation gantry 100, a plurality of rows (in this case, four rows) of protrusions 110 protruding in a convex shape on the upper side in the z direction are provided (see FIG. 2B). Each convex portion 110 is formed along the x direction.

  The intermediate gantry 200 is disposed on the foundation gantry 100. On the lower surface of the intermediate gantry 200, four rows of convex portions 210 protruding in a convex shape on the lower side in the z direction are provided in the y direction. Each convex portion 210 is formed along the x direction. A rolling support device (such as a roller 20) is provided between the base frame 100 and the intermediate frame 200. Furthermore, a plurality of rows of convex portions 220 projecting upward in the z direction are provided on the upper surface of the intermediate mount 200 in the x direction. Each convex portion 220 is formed along the y direction.

  The upper gantry 300 is, for example, an upper structure of a building or a large weight, and is disposed on the intermediate gantry 200. On the lower surface of the upper pedestal 300, a plurality of rows of convex portions 310 projecting downward in the z direction are provided in the x direction. Each convex portion 310 is formed along the y direction. Further, a rolling support device (such as the roller 20) is also provided between the intermediate mount 200 and the upper mount 300. However, the direction of arrangement is 90 degrees different from that of the rolling support device between the base frame 100 and the intermediate frame 200. When the upper frame 300 is a structure, the support structure shown in the figure is a seismic isolation structure, and when the upper frame 300 is a weight (the basic frame 100 is a structure), the support structure shown in the figure is a TMD vibration suppression system to be described later. It becomes a structure.

<About the structure between the foundation frame 100 and the intermediate frame 200>
As described above, the convex portion 110 is provided on the upper surface of the base gantry 100, and the convex portion 210 is provided on the lower surface of the intermediate gantry 200. In addition, the convex part 110 and the convex part 210 are corresponded to a 1st guide member. As shown in FIG. 2B, the convex portion 110 and the convex portion 210 are arranged adjacent to each other so as to be symmetric with respect to the center in the y direction (the convex portion 110 is provided on one side and the other side in the y direction). And the positional relationship between the convex portions 210 is reversed). Thereby, the intermediate mount 200 cannot move in the y direction with respect to the base mount 100. On the other hand, since both the convex part 210 and the convex part 110 are formed along the x direction, the intermediate gantry 200 can move (relative displacement) in the x direction with respect to the base gantry 100. In addition, a retainer 32, a roller 20, and a pinion 40 are provided as rolling bearings in the x direction between the basic gantry 100 (the convex portion 110) and the intermediate gantry 200 (the convex portion 210).

  The retainer 32 has an L-shaped cross section perpendicular to the x direction, and the long side of the L shape is disposed between the upper surface of the convex portion 110 of the base frame 100 and the lower surface of the intermediate frame 200, and the short side of the L shape is It is arranged between the side surface of the convex portion 110 of the base gantry 100 and the side surface of the convex portion 210 of the intermediate gantry 200. The structure of the L-shaped long side portion of the retainer 32 is the same as that of the retainer 30 (FIG. 1) described above. That is, a large number of rollers 20 having a central axis parallel to the y direction are arranged in the x direction in the long side portion. In addition, the rollers 20 are also provided side by side in the x direction on the short side of the L shape (between the side surface of the convex portion 110 of the base frame 100 and the side surface of the convex portion 210 of the intermediate frame 200). However, the center axis of the roller 20 on the short side of the L shape is parallel to the z direction.

  Further, the retainer 32 is also arranged symmetrically with respect to the center in the y direction according to the positional relationship between the convex part 110 of the basic gantry 100 and the convex part 210 of the intermediate gantry 200. That is, as can be seen from FIG. 2B, the L-shaped direction is reversed on one side and the other side in the y direction.

  Further, a pinion 40 is provided beside the roller 20 on the long side of the L-shape of the retainer 32 (see FIG. 2C), and on the upper surface of the convex portion 110 of the foundation frame 100 and the lower surface of the intermediate frame 200 Each is provided with a rack (not shown) that meshes with the pinion 40.

  With the above configuration, the intermediate gantry 200 can move (displace) only in the x direction with respect to the base gantry 100, and each roller 20 of the retainer 32 between the base gantry 100 and the intermediate gantry 200 is connected to the base gantry 100. Rolls in the x direction according to the relative displacement in the x direction with the intermediate mount 200. Further, by providing the pinion 40 and the rack (not shown), it is possible to suppress the displacement of the retainer 32 even when the displacement is repeated.

<About the structure between the intermediate mount 200 and the upper mount 300>
As described above, the convex portion 220 is provided on the upper surface of the intermediate frame 200, and the convex portion 320 is provided on the lower surface of the upper frame 300. In addition, the convex part 220 and the convex part 320 are corresponded to a 2nd guide member. The protrusions 220 and the protrusions 320 are alternately arranged in the x direction as shown in FIG. 2A. Thereby, the upper frame 300 cannot move in the x direction with respect to the intermediate frame 200. On the other hand, since both the convex part 220 and the convex part 320 are formed along the y direction, the upper frame 300 can move in the y direction with respect to the intermediate frame 200. In addition, a roller 20, a retainer 32, a pinion 40, and a rack (not shown) are provided as a rolling support between the intermediate gantry 200 (convex portion 220) and the upper gantry 300 (convex portion 320). These are the same structures as the rolling bearings formed between the base frame 100 and the intermediate frame 200, and the arrangement direction (rolling direction) is 90 degrees different.

  With the above configuration, the upper frame 300 can move (displace) only in the y direction with respect to the intermediate frame 200, and each roller 20 of the retainer 32 between the intermediate frame 200 and the upper frame 300 can be moved to the intermediate frame 200. And the upper gantry 300 roll in the y direction according to the relative displacement in the y direction. Further, by providing the pinion 40 and the rack (not shown), it is possible to suppress the displacement of the retainer 32 even when the displacement is repeated.

  Thus, the intermediate gantry 200 can move only in the x direction with respect to the basic gantry 100, and the upper gantry 300 can move only in the y direction with respect to the intermediate gantry 200. That is, the upper frame 300 can move in the x direction and the y direction with respect to the basic frame 100. In this way, twisting is generated with respect to displacement in two different directions (x direction and y direction) by stacking the rolling support device in one direction in two steps in the vertical direction so that the rolling directions are orthogonal to each other. The upper frame 300 can be supported without any problems.

  In the present embodiment, the cross section of the retainer 32 is L-shaped. However, the L-shaped short side portion (including the roller 20) may be omitted. That is, the rolling support device using the retainer 30 (FIG. 1) is arranged between the upper surface of the convex portion 110 of the base frame 100 and the lower surface of the intermediate frame 200, the upper surface of the convex portion 220 of the intermediate frame 200, and the lower surface of the upper frame 300. You may arrange | position between. In this case, for example, a sliding material having a small frictional resistance may be provided in a portion corresponding to the short side of the L shape.

  Moreover, you may provide the pinion 40 also in the part by the side of the short side of L character. In this case, a rack that meshes with the pinion 40 may be provided on the side surface of the convex portion 110 of the base frame 100 and the side surface of the convex portion 210 of the intermediate frame 200. Thereby, the position shift of the retainer 32 can be further suppressed.

<<< About TMD damping structure >>>
In the embodiment described below, a rolling support device is applied to a TMD (Tuned Mass Damper) damping structure. The TMD damping structure is provided with a mass body (weight), a restoration mechanism, and a damping mechanism in the structure to be damped so that the vibration frequency of the vibration system corresponds to the natural period of the structure to be damped in advance. The vibration control structure is adjusted (tuned).

  In addition, when the vibration suppression target is a building, there are many cases in which the planar shape is generally rectangular. In this case, the short side direction has a long natural period, and the long side direction has a short natural period. That is, the natural period differs between the short side direction and the long side direction. Therefore, in the present embodiment, even in such a case, vibrations in two different directions are reliably suppressed.

  3A to 3C are explanatory diagrams of the TMD damping structure of the present embodiment. 3A is a cross-sectional view along the x direction, FIG. 3B is a cross-sectional view along the y direction, and FIG. 3C is a top view. In FIG. 3B, the configuration above the upper mount 300 is the same as that in FIG.

  The TMD vibration control structure of the present embodiment is provided at the top of a building such as a high-rise building, and includes a base frame 100, an intermediate frame 200, and an upper frame 300. The configurations of the base gantry 100, the intermediate gantry 200, and the upper gantry 300 are the same as those shown in FIGS.

  In the present embodiment, the foundation gantry 100 is provided integrally with the structure at the top of the structure to be controlled (for example, a high-rise building). That is, the foundation frame 100 corresponds to a structure. In the present embodiment, the upper frame 300 is a large TMD weight and has a weight of 350 tons. Further, the weight of the intermediate gantry 200 is 150 tons, and the intermediate gantry 200 acts as a weight (additional mass) to the basic gantry 100 (the intermediate gantry 200 corresponds to the first mass body, and the upper gantry 300 is the first gantry. Equivalent to 2 masses). For this reason, the load applied to the intermediate mount 200 is only the load of the upper mount 300 (350 tons), whereas the load applied to the base mount 100 is the total load (500 tons) of the intermediate mount 200 and the upper mount 300. It becomes.

  In addition, rolling support devices are provided in two stages between the base frame 100 and the intermediate frame 200 and between the intermediate frame 200 and the upper frame 300 so that the rolling directions are orthogonal to each other. Thereby, the intermediate frame 200 can move (relative displacement) in the x direction with respect to the basic frame 100, and the upper frame 300 can move (relative displacement) in the y direction with respect to the intermediate frame 200. .

  Here, the intermediate frame 200 and the upper frame 300 are relatively displaced with respect to the basic frame 100 in the x direction. For this reason, the total load (500 tons) of the intermediate gantry 200 and the upper gantry 300 becomes an additional mass in the x direction. On the other hand, only the upper frame 300 is displaced relative to the foundation frame 100 in the y direction (the intermediate frame 200 does not move with respect to the foundation frame 100). Therefore, the load (350 tons) of only the upper pedestal 300 becomes an additional mass in the y direction.

  Therefore, for example, even when the planar shape of the structure (building) to be controlled is rectangular and the natural period is different between the long side direction and the short side direction, the vibration can be controlled by one TMD vibration control structure. . That is, when the planar shape of the building is rectangular, the natural period in the short side direction (corresponding to the first natural period direction) is long, and the natural period in the long side direction (corresponding to the second natural period direction) is short. For this reason, the building tends to sway in the short side direction with a long natural period. Therefore, if the x direction with a large additional mass is along the short side direction and the y direction with a small additional mass is along the long side direction, shaking in two different directions (long side direction and short side direction) can be ensured. Can be controlled.

  In addition, the TMD damping structure of the present embodiment includes a frame 410, a laminated rubber 430, a connecting plate 440, and an oil damper 450.

  As shown in FIG. 3A, the frame 410 has lower ends fixed to the corners of the four sides of the foundation gantry 100, and is provided so as to form an upper space on the upper gantry 300.

  Laminated rubber 430 (corresponding to a restoring mechanism) is a cylindrical member in which circular rubber layers and internal steel plates are alternately laminated, provided between two members, and when these two members are relatively displaced The positional relationship between the two members is restored. In the present embodiment, the laminated rubber 430 is provided between the upper surface of the upper frame 300 and the frame 410. That is, the laminated rubber 430 is provided in an upper space above the upper frame 300.

  The connecting plate 440 is a square steel plate-like member provided between the laminated rubbers 430 arranged in the vertical direction. Four laminated rubbers 430 are arranged on the same horizontal plane on the upper frame 300 and the connecting plate 440. As described above, by arranging a plurality (four in this case) of the laminated rubber 430 on the same horizontal plane (xy plane), stability during deformation can be further ensured. Furthermore, in this embodiment, the laminated rubber 430 is stacked in four stages in the vertical direction (stacked). By doing so, it becomes possible to follow a large deformation, and it is possible to extend the period.

  The oil damper 450 (corresponding to a damping mechanism) uses oil that is a viscous fluid to absorb vibration energy between two members that are relatively displaced and attenuate the vibration. Oil damper 450 is usually used in combination with laminated rubber 430 or the like. In the present embodiment, the oil damper 450 is arranged along each side of the upper frame 300 (along the x direction and the y direction), and between the upper surface of the upper frame 300 and the frame 410 (upper space). Is provided. In each side, the oil damper 450 is arranged in two upper and lower stages via a connecting plate 440. By disposing the oil damper 450 in this way, vibration can be efficiently damped in each of the x direction and the y direction.

  In the present embodiment, the laminated rubber 430 and the oil damper 450 are provided on the upper frame 300 (an upper space formed by the upper frame 300 and the frame 410). Thereby, the upper space on the upper mount 300 can be used effectively, and the installation area can be reduced. Also, if the upper frame 300 is disposed on the laminated rubber 430, the laminated rubber 430 may buckle and the upper frame 300 may fall when the displacement becomes large. Similarly, when the upper frame 300 is suspended from the frame 410, for example, the upper frame 300 may fall. In the present embodiment, since the laminated rubber 430 and the oil damper oper 450 are provided in the upper space above the upper frame 300, vibration can be suppressed while the fall of the upper frame 300 is suppressed.

  Further, in this embodiment, a rolling support device in one direction is provided in two stages so that the rolling directions are orthogonal to each other between the base frame 100 and the intermediate frame 200 and between the intermediate frame 200 and the upper frame 300. ing. Further, since the rack 50 and the pinion 40 are provided in each rolling support device, it is possible to suppress deformation and displacement of each of the foundation gantry 100, the intermediate gantry 200, and the upper gantry 300, thereby improving durability. be able to.

=== Other Embodiments ===
The above embodiment is for facilitating the understanding of the present invention, and is not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and it is needless to say that the present invention includes equivalents thereof. In particular, the embodiments described below are also included in the present invention.

<About support structure>
In the above-described embodiment, the rolling support using the roller 200 is used as a support between the base frame 100 and the intermediate frame 200 and between the intermediate frame 200 and the upper frame 300, but is not limited thereto. . For example, the rolling bearings may be stacked in two stages so that the rolling directions are orthogonal to each other via the intermediate mount 200 so as to roll in one direction using a sphere or a linear guide. Or you may pile up the sliding support provided so that it might slide in one direction in two steps so that a sliding direction may be orthogonal.

  In the above-described embodiment, the rack 50 and the pinion 40 are provided in the rolling support device, but these may be omitted. However, by providing the rack 50 and the pinion 40, the position shift of the retainer 30 can be further suppressed.

<About the restoration mechanism>
In the above-described embodiment, a plurality of laminated rubbers 430 are arranged on the same plane and further arranged in a plurality of stages in the vertical direction. However, this is not limited. For example, the laminated rubber 430 is arranged between the upper frame 300 and the frame 410 (upper space). Two laminated rubbers may be arranged. Further, a member other than laminated rubber (for example, a spring) may be used as the restoring mechanism.

  In the above-described embodiment, the laminated rubber 430 is provided in the upper space between the upper frame 300 and the frame 410. However, the present invention is not limited to this. For example, a part of the intermediate frame 200 and the upper frame 300 are respectively provided. Laminated rubber 430 may be provided between the foundation frame 100 and the intermediate frame 200 and between the foundation frame 100 and the upper frame 300 by extending sideways.

<About damping mechanism>
In the above-described embodiment, the oil damper 450 is used as the damping mechanism. However, the present invention is not limited to this, and another member (for example, a friction damper) may be used.

  In the above-described embodiment, the oil damper 450 is provided in the upper space between the upper frame 300 and the frame 410. However, the present invention is not limited to this and may be provided in a place other than the upper space. For example, you may provide between the side part of the top stand 300, and the side part of the frame 410 facing the said side part.

DESCRIPTION OF SYMBOLS 10 Rolling plate 20 Roller 30 Retainer 32 Retainer 40 Pinion 50 Rack 100 Base mount 110 Protrusion part 200 Intermediate stand 210 Protrusion part 220 Protrusion part 300 Upper stand 320 Protrusion part 410 Frame 430 Laminated rubber 440 Connecting plate 450 Oil damper

Claims (6)

A structure to be controlled, and
A first mass supported by the structure;
A second mass supported by the first mass;
A first guide mechanism that is provided between the structure and the first mass body and moves the first mass body in a predetermined direction with respect to the structure;
A second guide mechanism that is provided between the first mass body and the second mass body and moves the second mass body in an orthogonal direction perpendicular to the predetermined direction with respect to the first mass body;
With
In the predetermined direction, the first mass body and the second mass body are relatively displaced with respect to the structure,
In the orthogonal direction, only the second mass body is relatively displaced with respect to the structure body. The vibration damping structure according to claim 1,
The structure has a first natural period direction of a first natural period and a second natural period direction of a second natural period having a period shorter than the first natural period,
The predetermined direction is along the first natural period direction,
A vibration damping structure characterized in that the orthogonal direction is along the second natural period direction. The vibration damping structure according to claim 1 or 2,
A restoration mechanism for restoring a relative positional relationship between the structure and the first mass body and the second mass body;
A damping mechanism for attenuating vibration due to the relative displacement in the predetermined direction and the relative displacement in the orthogonal direction;
A vibration control structure characterized by comprising: A vibration damping structure according to claim 3,
A frame fixed to the structure, further comprising a frame forming an upper space on the second mass body;
A damping structure characterized in that the restoring mechanism and the damping mechanism are provided in the upper space. The vibration damping structure according to claim 4,
The vibration damping structure, wherein the restoring mechanism is a laminated rubber. The vibration damping structure according to claim 4 or claim 5,
The damping structure is characterized in that the damping mechanism is a damper.