JP3732274B2 - Vibration control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement of a vibration damping device that suppresses shaking of a structure due to an earthquake or wind power.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is known a vibration damping device in which a vibration damping mass that can be displaced in a horizontal plane is arranged on an upper part of a structure to actively or passively suppress the vibration of the structure. For example, as shown in FIG. Devices are known.
[0003]
In this structure, a rectangular parallelepiped damping mass 3 is suspended freely by a frame 2 installed on the top of the structure 1, and there are four suspensions between the four corners of the damping mass 3 and the frame 2. The damping mass 3 is supported in a horizontal plane by a universal joint 93, 93 provided at both ends of the suspension rod 4. In addition, the horizontal plane is the penetration direction and the left-right direction in the drawing.
[0004]
The frame 2 is provided with servo actuators 90X and 90Y for driving the damping mass 3 in the penetrating direction and the left-right direction in the drawing in the figure so as to be substantially orthogonal to each other. These servo actuators 90X and 90Y are arranged on the rod side. While being connected via a clevis 92 provided on the damping mass 3, the base end side is supported by a trunnion 91 provided on the frame 2 so as to freely swing.
[0005]
The servo actuators 90X and 90Y are driven in accordance with a command from a controller that calculates the amount of displacement of the damping mass 3 based on a detection value of an acceleration sensor (not shown), and are applied to the structure 1 by the resultant force of the servo actuators 90X and 90Y. The damping mass 3 is driven in a direction to suppress the applied vibration, and the shaking of the structure 1 is attenuated.
[0006]
[Problems to be solved by the invention]
By the way, when the planar shape of the structure is an elongated rectangle or the like, the shaking concentrates in the short side direction and the shaking in the long side direction may be very small. On the other hand, it may occur little in the long side direction.
[0007]
However, in the above-described conventional control device, the vibration control mass 3 is driven not only in the direction in which the vibration becomes a problem but also in the direction in which the vibration is minute, although the direction of the vibration is almost constant by the structure. Therefore, there is a problem that the servo actuator drives the damping mass 3 on the basis of acceleration in a direction in which vibration damping is hardly required, and the entire apparatus becomes complicated and expensive. The vibration mass 3 can be displaced in an arbitrary direction within a horizontal plane, and it is difficult to assume the displacement direction of the vibration suppression mass 3, and it is difficult to arrange a stopper for preventing excessive displacement of the vibration suppression mass 3. There was a problem.
[0008]
Therefore, the present invention has been made in view of the above problems, and enables to reduce the manufacturing cost while reliably suppressing the vibration of the structure in which the vibration is concentrated in a specific direction, and the excessive vibration suppression mass. The purpose is to reliably and easily regulate the displacement.
[0009]
[Means for Solving the Problems]
1st invention is provided with the support means which supports a damping mass with respect to a structure so that relative displacement is possible, and it damps the vibration of a structure, The said damping mass is moved only to one direction of a horizontal surface And a guide means for restricting the displacement of the damping mass, and a displacement preventing means for preventing the displacement of the damping mass when the displacement of the damping mass exceeds a predetermined value. A guide fixed to a structure, a pin movable on the guide by a moving roller, a pin holder fixed to the damping mass and mounted so that the pin can be displaced in a vertical direction, And a stopper plate that forms a gap between the guide and the end face of the guide when the damping mass swings beyond the allowable displacement range.
[0010]
According to a second invention, in the first invention, the guide means includes a pair of rails provided on one side of the damping mass or the structure side, and a roller provided on the other side. While being arranged in parallel along one direction of the structure, a predetermined gap is formed between the roller and the rails.
[0011]
In a third aspect based on the second aspect, the rail includes a gap adjusting means capable of changing a gap between the rail and the roller.
[0012]
In a fourth aspect based on the first aspect, the damping mass is provided with an attenuating means for attenuating relative displacement with the structure.
[0013]
According to a fifth invention, in the first invention, the damping mass includes a servo actuator that drives the damping mass according to vibration applied to the structure between the damping mass and the structure.
[0014]
According to a sixth aspect of the present invention based on the first aspect, the support means is composed of a suspension rod that freely oscillates the damping mass, and the suspension rod includes adjustment means that can change the overall length. .
[ 0015 ]
The seventh invention includes a bracket that is fixed to a structure and extends in the moving direction of the damping mass, and a frame portion provided on the pin holder sandwiches the bracket to guide the movement of the pin holder. The
[ 0016 ]
Further, the eighth invention is provided with locking means for detachably locking the pin at a predetermined position in the pin holder.
[ 0017 ]
According to a ninth aspect of the present invention, there is provided a fall prevention member for supporting the damping mass so that the damping mass does not fall to the structure side when the support means is damaged, between the damping mass and the structure side. did.
[ 0018 ]
[Action]
Therefore, in the first invention, for example, when the damping device is installed so as to allow the displacement of the damping mass only in the short side direction of the structure having an elongated planar shape and to regulate the displacement in the long side direction. Since the vibration of the long and narrow planar structure is concentrated in the short side direction, the vibration of the structure can be reliably suppressed even if the displacement direction of the damping mass is set as one axis, and the vibration is excessive in the short side direction of the structure. When vibration is applied and the damping mass attempts to displace beyond the specified value, the displacement prevention means prevents the damping mass from being displaced, so damage to the damping device or structure due to excessive displacement of the damping mass. Can be prevented.
When the damping mass swings beyond the allowable displacement range, the pin housed in the pin holder fixed to the damping mass falls from the end of the guide, and the gap between the end surface of the guide and the stopper plate Since it penetrates into the inside, the oscillation exceeding the allowable range of the damping mass is surely restricted, and damage to the damping mass and the structure can be surely avoided. Further, if the pin is lifted upward from the gap between the end face of the guide and the stopper plate, the damping mass can be fixed, so that the damping mass can be easily returned to the neutral position.
[ 0019 ]
In the second invention, when vibration is applied to the structure, the rail and the roller are relatively displaced only in the swinging direction, and the displacement of the damping mass in the direction intersecting the swinging direction is restricted, that is, Displace the damping mass only in one direction.
[ 0020 ]
In the third invention, the pair of rails is provided with a gap adjusting means capable of changing a gap between the rollers, and a dimensional error when installing the vibration damping device can be easily corrected after the installation. Thus, a smooth vibration control operation can be performed by preventing an increase in resistance in the swing direction.
[ 0021 ]
In the fourth invention, a damping means for attenuating relative displacement is provided between the damping mass and the structure, and the damping mass passively vibrates according to the vibration of the structure. While suppressing the vibration of the object, the relative displacement between the damping mass and the structure can be attenuated by the damping means, and the displacement of the damping mass can be stopped according to the convergence of the vibration of the structure.
[ 0022 ]
In the fifth invention, a servo actuator that drives the damping mass according to the vibration applied to the structure is interposed between the damping mass and the structure. The vibration of the structure can be suppressed by the vibration mass actively vibrating.
[0023]
Moreover, in the sixth invention, since the adjusting means capable of changing the overall length of the suspension rod that hangs the damping mass is provided, the natural vibration period of the damping mass can be easily synchronized with the natural vibration period of the structure, One damping device can be applied to a wide range of structures, and the versatility of the damping device can be expanded.
[ 0024 ]
In the seventh aspect of the invention, since the frame of the pin holder sandwiches the bracket, the pin holder is guided by a track along the bracket, and the pin accommodated in the pin holder also reliably moves on a predetermined track on the guide. At the same time, when the vibration control mass swings beyond the allowable displacement range, the pin surely penetrates into the gap between the end face of the guide and the stopper plate.
[ 0025 ]
According to the eighth aspect of the invention, if the pin penetrating into the gap between the end face of the guide and the stopper plate is lifted again and the pin is locked at a predetermined position in the pin holder by the locking means, the pin is positioned above the guide. It is possible to easily return to the state of riding.
[ 0026 ]
In the ninth invention, when the support means is damaged, the fall prevention member is located between the damping mass and the structure side so that the damping mass does not fall to the structure side. Can be prevented from falling to the structure side and receiving fatal damage.
[ 0027 ]
DETAILED DESCRIPTION OF THE INVENTION
1 to 9 show an embodiment of the present invention.
[ 0028 ]
In FIG. 1 and FIG. 2, the damping mass 3 is suspended from a frame 2 erected on the uppermost part of the structure 1 as in the conventional example, and is formed of, for example, a rectangular parallelepiped. For example, as described above, 1 is configured in a planar shape composed of a long side and a short side, and the vibration is concentrated in the short side direction. In FIG. 1, the Y axis is the long side direction and the X axis is the short side. Direction.
[ 0029 ]
Four suspension rods 4 are interposed between the frame 2 and the vicinity of the four corners of the gantry 5 that supports the damping mass 3, and via roller bearings 6 and 6 provided at both ends of the suspension rod 4 as support means. The damping mass 3 is supported so as to freely swing in a predetermined direction within a horizontal plane. The horizontal plane is the XY plane of FIG. 1, and the damping mass 3 is suspended so as to be swingable in the short side direction, that is, the X-axis direction in the drawing. Hereinafter, the X-axis direction in FIGS.
[ 0030 ]
The suspension rod 4 is disposed on the side surface parallel to the swinging direction of the damping mass 3, and as shown in FIG. 2, the suspension rod 4 is constituted by a turnbuckle and adjusted to an arbitrary overall length. By changing the overall length of the suspension rod 4, the natural period of the damping mass 3 hanging from the frame 2 is changed and synchronized with the natural period of the structure 1.
[ 0031 ]
Therefore, bolt holes 12A and 13A are predetermined in the vertical direction (Z-axis direction in FIG. 2) in the support member 12 projecting downward from the frame 2 and the support member 13 projecting upward from the mount 5. A plurality of roller bearings 6, 6 provided at both ends of the suspension rod 4 are fastened through bolt holes 12 </ b> A, 13 </ b> A corresponding to the entire length of the suspension rod 4.
[ 0032 ]
On the other hand, a pedestal 1A is fixed on the structure 1 side facing the damping mass 3 suspended from the frame 2, and a damping means is provided between the pedestal 1A and the gantry 5 that supports the damping mass 3. The damper 8, a large number of springs 7, a rail 11 as a guide means, and a stopper 20 as a displacement prevention means are respectively arranged at predetermined positions along the swinging direction.
[ 0033 ]
First, the damper 8 is interposed between the bracket 14 provided on the pedestal 1 </ b> A side and the bracket 15 protruding from the lower surface of the gantry 5, and generates a damping force according to the expansion and contraction operation of the damper 8.
[ 0034 ]
In order to urge the damping mass 3 toward a predetermined neutral position, a large number of springs 7 have a base end connected to the base 1 </ b> A and the other end connected to the base 5, and a pair of springs 7, 7 facing each other are connected. A plurality of them are arranged to finely adjust the oscillation period of the damping mass 3 and urge toward the neutral position.
[ 0035 ]
As shown in FIGS. 3 to 5, a pair of rail support members 10, 10 are arranged to be opposed to each other at a predetermined interval at a predetermined position of the pedestal 1 </ b> A. A roller 9 pivotally supported by the gantry 5 is interposed, and constitutes a guide means for restricting the displacement of the damping mass 3 in the Y-axis direction and guiding it in the X-axis direction. The roller 9 corresponds to the roller of the present invention, and the rail 11 corresponds to the rail of the present invention.
[ 0036 ]
A rail 11 that abuts on the roller 9 is fixed to the rail support member 10, and the roller 9 abuts on one of the opposed rails 11, 11 and rotates to rotate the damping mass 3 in the swinging direction. To guide.
[ 0037 ]
The rail 11 disposed on the rail support member 10 is inserted into a through hole (not shown) of the rail support member 10 through a bolt 16 provided on the rail 11 side in order to adjust the gap between the rail 9 and the rail support. It is fixed by a pair of nuts 17 and 17 that sandwich the member 10. A minute gap is formed between the rail 11 and the roller 9 by changing the fastening position of the nuts 17 and 17 as the gap adjusting means.
[ 0038 ]
Further, as shown in FIGS. 6 to 9, stoppers 20 as displacement preventing means for preventing excessive vibration of the damping mass 3 are disposed at predetermined positions of the base 1 </ b> A and the mount 5.
[ 0039 ]
On the base 1A, a pair of brackets 24, 24 each having a stopper plate 25 fixed along the Y-axis direction are fixed at predetermined intervals in the swinging direction. A pin holder 21 is provided between the stopper plates 25 and 25 facing each other at a predetermined interval. The pin holder 21 protrudes downward from the gantry 5 and includes a columnar pin 23 that can be displaced in the vertical direction. .
[ 0040 ]
As shown in FIGS. 6 and 7, the pin holder 21 includes a cylindrical portion 21 </ b> A and a pair of frame portions 21 </ b> B and 21 </ b> B that extend from the cylindrical portion 21 </ b> A in parallel in the left and right directions in the Y-axis direction.
[ 0041 ]
In this cylinder part 21A, the pin 23 is supported so that it can slide freely and protrude from the lower end of the cylinder part 21A.
[ 0042 ]
Further, the pair of frame portions 21B and 21B sandwich the brackets 24 and 24 from both sides, and the pin holder 21 is guided by the brackets 24 and 24 in the frame portions 21B and 21B so as to guide on an accurate track. It has come to be.
[ 0043 ]
As shown in FIG. 6, the frame portions 21B and 21B and the brackets 24 and 24 of the pin holder 21 are connecting bolts 41. As shown in FIG. 8, the cylindrical portion 21A and the pin 23 of the pin holder 21 are connecting bolts. Each of the stoppers 42 can be fixed, and the stopper 20 can be easily installed at a predetermined position by fixing with the bolts 41 and 42.
[ 0044 ]
On the other hand, a guide 22 is fixed to a predetermined position between the brackets 24, 24 on the pedestal 1 </ b> A facing the pin 23 at the neutral position of the damping mass 3. The guide 22 is formed in a substantially square planar shape, and is in sliding contact with the moving roller 43 provided on the pin 23 supported by the pin holder 21 on the upper surface and forms a predetermined gap between the stopper plates 25 and 25. End surfaces 22A and 22A are formed.
[ 0045 ]
This gap is set to a value that allows the pin 23 that has moved on the upper surface of the guide 22 via the moving roller 43 to penetrate when the displacement of the damping mass 3 exceeds a predetermined allowable value. If the mass 3 is to be displaced beyond the allowable value, the pin 23 ′ penetrates between the guide 22 and the stopper plate 25 to lock the gantry 5 as shown in FIG. To prevent excessive displacement.
[ 0046 ]
A cushion 44 is interposed between the stopper plate 25 and the bracket 24 to which the stopper plate 25 is fixed, so as to reduce the impact when the pin 23 collides with the stopper plate 25.
[ 0047 ]
It is comprised as mentioned above, Next, an effect | action is demonstrated.
[ 0048 ]
When the planar shape of the structure 1 is an elongated shape, for example, a rectangle having short sides and long sides as described above, shaking of the structure 1 due to an earthquake or wind concentrates in the short side direction. When the structure 1 swings in the short side direction, that is, in the X-axis direction in FIG. 1, the damping mass 3 also swings in the X-axis direction, and the structure 1 depends on the reaction force of the swinging mass 3 swinging. The vibration is attenuated. Then, the vibration of the damping mass 3 is attenuated by the damper 8, and the damping mass 3 also stops at a predetermined neutral position in accordance with the convergence of the shaking of the structure 1. Note that the natural vibration period of the damping mass 3 is set in advance so that the entire length of the suspension rod 4 formed of a turnbuckle is synchronized with the natural vibration period of the structure 1 to be controlled. The spring 7 is used for fine adjustment of the tuning period. This is because the pitch of the turnbuckle fixing holes 13A is stepwise, so that the period cannot be continuously adjusted only by adjusting the turnbuckle length.
[ 0049 ]
Although the structure 1 also has minute vibrations in the Y-axis direction (long side direction), as described above, since it is very small compared to the short side direction, no special vibration control operation is required. The vibration of the structure 1 can be attenuated by the vibration control operation of the vibration control mass 3 in the short side direction.
[ 0050 ]
Although vibration is applied to the damping mass 3 not only in the short side direction but also in the long side direction, the roller 9 is guided by the pair of rail support members 10 in the damping mass 3, and the vibration is suppressed in the long side direction. Accordingly, the roller 9 comes into contact with one of the opposed rails 11 and 11 to restrict the displacement of the damping mass 3 in the Y-axis direction, and allows only the swing in the X-axis direction.
[ 0051 ]
Here, when a vibration exceeding a predetermined allowable value is applied in the short side direction of the structure 1, as shown in FIG. 6, the stopper 20 is actuated to prevent an excessive displacement of the damping mass 3, Prevent damage.
[ 0052 ]
That is, when the oscillation of the damping mass 3 is less than the allowable value, the pin 23 accommodated in the pin holder 21 only moves on the upper surface of the guide 22 via the moving roller 43. When the pin 3 tries to swing beyond the allowable value, the pin 23 penetrates into the gap between the guide 22 and the stopper plate 25, so that the displacement of the pin 23 is restricted and locked. For this reason, the pin holder 21 housing the pins 23 prevents excessive displacement of the damping mass 3 via the gantry 5, and the damping mass 3 is fixed against such excessive vibration input, To prevent damage. The impact applied to the stopper plate 25 when the pin 23 penetrates into the gap is alleviated by a cushion 44 interposed between the stopper plate 25 and the bracket 24.
[ 0053 ]
Further, if the pin 23 inserted between the guide 22 and the stopper plate 25 is lifted again to the pin holder 21 side, the damping mass 3 can be easily fixed, so that the pin 23 reaches the position where it comes to the upper surface of the guide 22. The damping mass 3 can be easily moved, and the damping mass 3 thus returned to the neutral position can perform the damping operation again. At this time, if the pin 23 is fixed in the cylindrical portion 21 </ b> A and fixed by the connecting bolt 42, the operation of moving the damping mass 3 and placing the pin 23 on the guide 22 again can be easily performed.
[ 0054 ]
Thus, since the swinging direction of the damping mass 3 is uniaxial, it is possible to reliably perform the damping operation of the structure 1 having an elongated flat shape while simplifying the configuration of the apparatus. A suitable damping device can be provided at a low cost, and the stopper 20 for preventing excessive displacement can be easily arranged by setting the swinging direction of the damping mass 3 to one axis, which reduces the manufacturing cost. While suppressing the increase, it is possible to reliably prevent damage to the vibration damping device or the structure 1 due to excessive vibration input.
[ 0055 ]
Furthermore, since the suspension rod 4 that hangs down the damping mass 3 is configured with an extendable turnbuckle, the natural vibration period of the damping mass 3 can be easily synchronized with the natural vibration period of the structure 1. The damping device can be applied to a wide range of structures, and the versatility of the damping device can be expanded.
[ 0056 ]
Further, as the guide means for restricting the displacement of the damping mass 3 in the Y-axis direction, the roller 9 that selectively contacts the pair of rails 11 and 11 is provided, so that the swinging direction of the damping mass 3 is regulated. In addition, it is possible to suppress resistance such as frictional force in the swinging direction, and to smoothly swing the damping mass 3 to surely perform the damping operation of the structure 1. Since a rail 11 capable of adjusting the gap in the Y-axis direction is interposed between the roller 9 and the rail support member 10, an installation error of the vibration damping device can be allowed, and the vibration damping operation can be performed with high accuracy. It becomes possible.
[ 0057 ]
In the above-described embodiment, the structure having an elongated planar shape is the object to be controlled. However, the present invention is not limited to this, and in the case of a structure that is strongly affected by the vibration from one direction, the vibration It is only necessary to allow the damping mass to swing only in the direction.
[ 0058 ]
In addition, while a roller is provided on the vibration control mass 3 side and a rail is provided on the structure 1 side, a rail may be arranged on the vibration control mass 3 and a roller on the structure 1 side.
[ 0059 ]
【The invention's effect】
As described above, according to the first invention, for example, the displacement of the damping mass is allowed only in the short side direction of the structure having an elongated flat shape, and the displacement in the long side direction is restricted. Then, since the vibration of the elongated planar structure is concentrated in the short side direction, even if the displacement direction of the damping mass is set to one direction, the vibration of the structure can be reliably suppressed, and the displacement direction of the damping mass is set to the horizontal plane. Therefore, it is possible to provide a vibration control device suitable for elongated structures at a low cost by simplifying the structure of the device, and preventing the excessive displacement by setting the displacement direction of the vibration control mass to one direction. Therefore, it is possible to easily dispose the displacement prevention means, and to suppress an increase in manufacturing cost and to reliably prevent damage to the vibration damping device or the structure due to excessive vibration input.
When the damping mass swings beyond the allowable displacement range, the pin housed in the pin holder fixed to the damping mass falls from the end of the guide, and the gap between the end surface of the guide and the stopper plate Since it penetrates into the inside, the oscillation exceeding the allowable range of the damping mass is surely restricted, and damage to the damping mass and the structure can be surely avoided. Further, if the pin is lifted upward from the gap between the end face of the guide and the stopper plate, the damping mass can be fixed, so that the damping mass can be easily returned to the neutral position.
[ 0060 ]
According to the second aspect of the invention, only when the vibration component applied to the structure coincides with the sliding contact direction of the rail and the roller, the roller rotates along the rail while the damping mass is applied in one direction of the structure. It is possible to guide, and it is possible to perform the vibration control operation of the structure reliably by smoothly swinging the vibration control mass while suppressing the resistance such as frictional force.
[ 0061 ]
According to the third invention, the pair of rails is provided with a gap adjusting means capable of changing a gap between the rollers, and a dimensional error when installing the vibration damping device can be easily corrected after installation. The resistance of the damping mass in the short side direction of the object is prevented from increasing, and a smooth and highly accurate damping operation can be performed.
[ 0062 ]
According to the fourth invention, the damping means for attenuating relative displacement is provided between the damping mass and the structure, and the damping mass passively vibrates according to the vibration of the structure. While the vibration of the structure is suppressed, the relative displacement between the damping mass and the structure can be attenuated by the damping means, and the displacement of the damping mass can be stopped according to the convergence of the vibration of the structure.
[ 0063 ]
According to the fifth invention, a servo actuator that drives the damping mass according to the vibration applied to the structure is interposed between the damping mass and the structure. Thus, the vibration of the structure can be suppressed by actively vibrating the damping mass.
[ 0064 ]
According to the sixth aspect of the invention, since the total length of the suspension rod that freely oscillates the damping mass can be changed, the natural vibration period of the damping mass can be easily synchronized with the natural vibration period of the structure. In addition, one damping device can be applied to a wide range of structures, and the versatility of the damping device can be expanded.
[ 0065 ]
According to the seventh aspect of the invention, since the frame of the pin holder sandwiches the bracket, the pin holder is guided along a track along the bracket, and the pin housed in the pin holder also ensures a predetermined track on the guide. When the vibration control mass swings beyond the allowable displacement range, the pin surely penetrates into the gap between the end face of the guide and the stopper plate.
[ 0066 ]
According to the eighth invention, if the pin penetrating into the gap between the end face of the guide and the stopper plate is lifted again and the pin is locked at a predetermined position in the pin holder by the locking means, the pin is guided by It is possible to easily return to the state of riding on.
[ 0067 ]
According to the ninth invention, when the support means is damaged, the fall prevention member is located between the damping mass and the structure side so that the damping mass does not fall to the structure side. The shaking mass can be prevented from falling to the structure side and receiving fatal damage.
[Brief description of the drawings]
FIG. 1 is a front view of a vibration damping device showing an embodiment of the present invention.
FIG. 2 is also a plan view.
FIG. 3 is a plan view showing the main parts of a guide roller and a guide rail.
4 is a view taken along the line DD in FIG.
5 is a half sectional view taken along arrow E in FIG.
FIG. 6 is a front view showing the main part of the stopper.
7 is a view taken along the line AA in FIG.
8 is a cross-sectional view taken along arrow BB in FIG.
FIG. 9 is a view taken along the line CC in FIG.
FIG. 10 is a front view of a vibration damping device showing a conventional example.
[Explanation of symbols]
1 structure 3 damping mass 4 suspending rod 7 spring 8 damper 9 roller 10 rail support member 11 rail 16 bolts 17 nuts 20 the stopper 21 pin holder 22 guide pin 23 24 Bracket 25 stopper plates
4 1 Connecting bolt 42 Connecting bolt 43 Moving roller 44 Cushion

Claims (9)

In a vibration damping device that includes a support means for supporting the vibration damping mass relative to the structure so as to be capable of relative displacement, the vibration damping mass can be moved only in one horizontal plane. A guide means for restricting the displacement of the mass; and a displacement prevention means for preventing the displacement of the vibration suppression mass when the displacement of the vibration suppression mass exceeds a predetermined value. The displacement prevention means is fixed to the structure. A guide, a pin movable on the guide by a moving roller, a pin holder fixedly mounted on the damping mass and displaceable in the vertical direction, and the damping mass being allowed to displace A vibration damping device comprising: a stopper plate that forms a gap between the end face of the guide and a gap through which the pin drops and penetrates when swung beyond a range. The guide means includes a pair of rails provided on one side of the damping mass or the structure side and a roller provided on the other side, and the rails are arranged in parallel along one direction of the structure. The vibration control device according to claim 1, wherein a predetermined gap is formed between the roller and the rails. The vibration damping device according to claim 2, wherein the rail includes a gap adjusting unit capable of changing a gap between the rail and the roller. The damping device according to claim 1, wherein the damping mass includes damping means for damping relative displacement between the damping mass and the structure. The vibration damping device according to claim 1, wherein the vibration damping mass includes a servo actuator that drives the vibration damping mass according to vibration applied to the structure between the vibration damping mass and the structure. 2. The vibration damping device according to claim 1, wherein the support means is constituted by a suspension rod that hangs down freely on a vibration damping mass, and the suspension rod includes an adjustment means capable of changing a total length. . A bracket fixed to a structure and extending in a moving direction of the vibration control mass is provided, and a frame portion provided on the pin holder sandwiches the bracket to guide the movement of the pin holder. The vibration damping device according to 1. 2. The vibration damping device according to claim 1, further comprising locking means for detachably locking the pin at a predetermined position in the pin holder. A fall prevention member that supports the damping mass is interposed between the damping mass and the structure side so that the damping mass does not fall to the structure side when the support means is damaged. The vibration damping device according to claim 1, wherein the vibration damping device is characterized in that:

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