JP2001116082A - Vibration control device for building structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve facility and the working efficiency of tuning of a vibration control frequency of a rubber mount and a mass member and carrying-in/ installation of a vibration control device, and advantageously prevent buckling deformation of the rubber mount in the vibration control device being installed in a building structure and exhibiting a vibration control effect to horizontal directional vibration. SOLUTION: A rubber mount 14 of a specific structure having the large orthogonal horizontal two directional spring ratio is used, and the spring ratio of the rubber mount 14 can be easily and highly accurately tuned by changing the installing direction of such a rubber mount 14 around the mount axis. The total weight of a mass body 12 can be adjusted by constituting the mass body 12 by superposing plural plate-like divided masses 16 in the vertical direction, and the mass body 12 can be dividedly carried in and arranged to thereby advantageously prevent buckling deformation of the mount 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damping device which can constitute a sub-vibration system for a building structure such as a house or a lightweight steel frame office and can exert a dynamic vibration absorbing effect on a building structure as a main vibration system. In particular, the present invention relates to a vibration damping device for a building structure having a novel structure, which can easily perform frequency tuning of a vibration damping characteristic, and is excellent in workability of loading and setting into a building structure. is there.

[0002]

2. Description of the Related Art In a building structure such as a general house, a horizontal vibration may be generated by an external force such as traffic vibration or wind acting as an exciting force. In particular, in recent years, the number of two-story and three-story buildings has increased in general houses and lightweight steel-frame offices, etc. Due to the tendency to increase, microtremors due to traffic vibrations have become a problem as a cause of unpleasant noises and vibrations in living life (for example, when sleeping) or during work. In addition, the natural frequency in the horizontal direction in a building structure generally has different characteristics depending on the direction, and an effective vibration damping effect is required for vibrations in different frequency ranges in two directions orthogonal to each other. .

[0003] By the way, as a vibration reduction device for a building structure, several damper devices for reducing the vibration of a high-rise building such as a high-rise building or a tower have been proposed.
For example, Japanese Patent Application Laid-Open No. 8-338467 discloses a damper device in which an additional mass is elastically supported on a building structure by a rubber mount, and an inclined reinforcing plate is embedded and fixed to each rubber mount. A structure is disclosed in which the tuning frequency of the damper device is made different in the horizontal direction orthogonal to each other by changing the spring ratio in the horizontal direction orthogonal to each other.

However, in such a damper device,
In order to adjust the tuning frequency ratio in the two directions orthogonal to each other in the horizontal plane, when trying to change the spring ratio in the two directions orthogonal to each other in the horizontal plane for each rubber mount, the inclination angle of the reinforcing plate embedded and fixed to each rubber mount Has to be changed, and since it is necessary to replace each rubber mount with one having a different specification, there has been a problem that it is extremely difficult to respond. Therefore, in the damper device, it is difficult to finely adjust the tuning frequency ratio in two directions orthogonal to each other in the horizontal plane, and it is difficult to tune with high accuracy the frequency to be damped in the building structure. Was. Further, in such a damper device, there is a problem that tuning for a vibration which is a problem in a building structure to be damped is troublesome and time-consuming.
If re-tuning is required, such as when the vibration frequency or the natural frequency of the damper device changes due to temperature changes caused by changes in time, etc. There was a problem that it was difficult.

On the other hand, Japanese Patent Application Laid-Open No. Hei 10-82449 discloses that a first mounting bracket attached to a mass member and a second mounting bracket attached to a building structure are arranged to face each other in one direction. By using a rubber mount in which a rubber block is arranged between the opposing surfaces of the damper device, by changing the inclination angle of the rubber mount with respect to the facing direction of the building structure and the mass member, two horizontal directions orthogonal to each other in the damper device are obtained. A structure in which the tuning frequency ratio can be adjusted is disclosed.

However, in such a damper device,
When the rubber mount is inclined with respect to the vertical axis, the weight of the mass member acts in the shearing direction of the rubber block, so that buckling or the like is likely to occur in the rubber block. When the mass member is mounted on the rubber mount when the damper device is installed, there is a problem that the load acting on the rubber mount is slightly eccentric due to the inclination of the mass member or the like, and the rubber block is easily buckled.

In addition, conventionally, in any of the above damper devices, the mass member elastically supported by the rubber block is formed of a single heavy metal member. Therefore, there is a problem that the adjustment of the mass of the mass member and the adjustment of the tuning frequency of the damper device are troublesome, and the change and adjustment of the mass of the mass member are inevitably burdened with great cost.

Further, in such a conventional damper device, the weight of the mass member can be as large as several hundred to 1,000 kg even in a general house, for example. It is extremely difficult to carry the mass member into and out of a narrow ceiling or the like, and install the mass member.

In addition, when such a heavy mass member is installed, an extremely large prying load or the like acts on the rubber mount when the mass member is only slightly inclined. Buckling tends to occur, and once buckled, the rubber mount is difficult to recover.Because the mass member must be removed and reinstalled, the operation is extremely complicated, and the rubber mount may be damaged. It was.

[0010]

Here, the present invention has been made in view of the above-described circumstances, and a problem to be solved is to prevent horizontal vibration by being attached to a building structure. This is a vibration damping device that exhibits a vibration damping effect, and can easily and accurately adjust the horizontal tuning frequency and the ratio between two orthogonal horizontal tuning frequencies without requiring replacement of rubber mounts. It is an object of the present invention to provide a vibration damping device having a novel structure that can be adjusted and buckling in a rubber mount is advantageously prevented.

Further, the present invention can easily adjust the mass of the mass member, and can easily carry in and install the mass member. In addition, the bias of the load applied to the rubber mount at the time of installation is reduced, and the seat of the rubber mount is reduced. It is also an object to provide a vibration damping device having a novel structure in which bending can be advantageously avoided.

[0012]

An embodiment of the present invention which has been made to solve such a problem will be described below. In addition, each aspect described below can be adopted in any combination. Further, aspects or technical features of the present invention are described in the entire specification and the drawings without being limited to those described below.
Alternatively, it should be understood that the present invention is recognized based on the inventive concept that can be grasped by those skilled in the art from the description thereof.

In a first aspect of the present invention, a mass member is elastically supported by a spring member on a building structure.
In the vibration damping device constituting a sub-vibration member for the building structure, the spring member may be a first mounting member mounted to one of the building structure and the mass member and a second mounting member mounted to the other. The member includes a plurality of rubber mounts connected by a main rubber elastic body, and a mount center axis extending in a vertical direction is sandwiched between a first mounting member and a second mounting member of the rubber mount. A pair of inclined opposing surfaces facing each other in a direction of inclination substantially symmetric with respect to the center axis of the mount are provided, and the main rubber elastic body is disposed between the pair of inclined opposing surfaces. It is characterized in that, while being connected by the main rubber elastic body, the mass member is constituted by a plurality of plate-shaped divided masses which are fixed to each other by being vertically overlapped with each other.

In the vibration damping device having such a structure according to this aspect, in the rubber mount employed therein, a horizontal load is applied between the first mounting member and the second mounting member. In the direction where the inclined opposing surfaces are positioned on both sides of the mount center axis when the is input, effective compression / tensile stress is generated in the main rubber elastic body disposed between the inclined opposing surfaces. On the other hand, in the horizontal direction perpendicular to the above, a shear stress is generated exclusively in the main rubber elastic body. Therefore, in such a rubber mount,
A large spring ratio can be set in two horizontal directions orthogonal to each other (directions perpendicular to the center axis of the mount). Therefore, by changing the arrangement direction of each rubber mount around the center axis of the mount, the spring constant of the spring member in the specific horizontal direction in the vibration damping device and, consequently, the tuning frequency in the specific horizontal direction of the vibration damping device are increased. In the vibration damping device, the spring characteristic ratio of the spring member and the tuning frequency ratio of the vibration damping device in two specific horizontal directions perpendicular to each other can be easily adjusted. Can be easily adjusted with a large degree of freedom.
Note that the mount center axis is generally a load input direction in which stable elastic deformation is generated in the main rubber elastic body, and is usually the elastic main axis direction.

In each rubber mount, a mount center axis serving as an elastic support center is always arranged to extend in a vertical direction, and is opposed symmetrically inclined on both sides of the mount center axis. Since the main rubber elastic body is provided between the pair of inclined opposed surfaces, it is possible to exhibit effective load-bearing performance against a vertical load, such as buckling of the main rubber elastic body. Can also be effectively prevented.
Moreover, in each rubber mount, the spring ratio in the two horizontal directions orthogonal to each other is advantageously set, so that a large spring ratio in the two horizontal directions is sufficiently secured, and the pair of inclined opposing surfaces is positioned at the center of the mount. The buckling strength of the main rubber elastic body can be more advantageously obtained by setting the thickness of the main rubber elastic body to be large not only in the direction sandwiching the shaft but also in the direction perpendicular thereto. Become.

Moreover, in the vibration damping device having the structure according to this aspect, the mass member is constituted by a plurality of plate-shaped divided masses which are fixed to each other by being vertically overlapped with each other. The mass of the mass member can be easily adjusted by changing the number of plate-shaped divided masses to be superimposed. In addition, since a plurality of plate-shaped divided masses can be separately loaded and installed, and a target mass member can be assembled at a place where the vibration damping device is mounted, the mass member can be easily loaded and installed. Can be done. Furthermore, it is possible to assemble a mass member by placing a plurality of plate-shaped divided masses sequentially on a rubber mount for each of them.
Thereby, the unbalanced load on the rubber mount due to the inclination or the like at the time of installation of the mass member can be reduced or avoided, so that the buckling change of the rubber mount at the time of installation of the mass member is also advantageously prevented. In particular, even in a rubber mount in which a large spring ratio is set in two horizontal directions and a spring constant in one horizontal direction is reduced as described above,
Buckling at the time of mass member installation and the like is more effectively prevented, and by adopting the divided mass structure in the rubber mount of the specific structure as described above, a large degree of freedom in tuning in the sub-vibration system, More stably and advantageously can be secured.

The material and shape of the plate-shaped divided mass are not particularly limited, but as the material, for example, a metal material having a high specific gravity such as an iron-based or lead-based material can be suitably used.
From the viewpoint of cost performance, manufacturability, and the like, a rolled steel plate or the like is more preferably employed. Further, as each plate-shaped divided mass, those having the same thickness may be used, but those having different thicknesses and different weights may be used in combination. The adjustment of the mass of the member can be performed more efficiently. Furthermore, the planar shape of each plate-shaped divided mass is preferably the same, so that assembly by superposition and mutual fixing can be performed more easily. In addition, the mutual fixing structure of the plurality of plate-shaped divided masses is not limited at all, and welding, rivets, and the like can be adopted, but it is easy to change the number of plate-shaped divided masses after installation. Therefore, a detachable fixing structure using a bolt or the like is desirable.

In the vibration damping device having the structure according to this aspect, at least the first mounting member and the second mounting member are provided in order to stably set the mounting direction around the central axis of each rubber mount. A fixing means for positioning and fixing one to the building structure side or the mass member side is suitably employed. Furthermore, the number, arrangement, and the like of the rubber mounts employed in the vibration damping device having the structure according to the present embodiment are not particularly limited, and all the rubber mounts employed are replaced by the first embodiment. It is not necessary to use a rubber mount having a structure according to the above, and a spring member can be formed by combining rubber mounts having other structures.

Further, in the rubber mount employed in this embodiment, the inclination angle of the opposed central axis of each inclined opposed surface to the mount central axis is not particularly limited, and the required spring ratio in the direction perpendicular to the axis is not limited. In accordance with the tuning range or the like, the larger the tuning range is, the larger the inclination angle is set. In this case, it is desirable that both sides where the pair of inclined opposing surfaces are positioned with the mount center axis interposed therebetween are set so that the spring characteristics are mutually symmetric with respect to the mount center axis. In the rubber mount employed in this aspect, the mounting structure of the first and second mounting members to the building structure or the mass member is not particularly limited. It is desirable to provide a mounting shaft that is attached to a structure or a mass member by a screwing structure or the like. In particular, it is possible to adjust the mounting direction of the rubber mount by rotating the rubber mount around the mounting shaft. This facilitates adjustment of the mounting direction of the rubber mount.

Further, the vibration damping device having the structure according to this aspect is attached to an arbitrary member at an arbitrary position such as a beam, a slab, a girder, or an edge according to the structure and the type of the building structure. It is preferably installed, for example, by efficiently utilizing the space provided in the ceiling portion of the top floor of a general house, which is advantageous in terms of the vibration mode of the building structure. In addition, the vibration suppression device may be one, but a plurality of vibration suppression devices formed independently of each other,
It is, of course, possible to attach the vibration damping device to a building structure, and the respective vibration damping devices may be tuned to different frequency ranges.

According to a second aspect of the present invention, in the vibration damping device having the structure according to the first aspect, a stopper mechanism for limiting a relative displacement amount of the mass member with respect to the building structure is provided. That is the feature. By adopting such a stopper mechanism, even if a temporary large load is applied in the event of an earthquake, etc., excessive displacement of the mass member and eventually excessive deformation of the rubber mount are prevented, so that the building structure The effect of excessive load on the rubber mount can be avoided, and the buckling deformation of the rubber mount can be advantageously prevented. The stopper mechanism may be configured by, for example, providing a pair of stopper members that are fixed to the building structure and the mass member and face each other at a predetermined distance in the horizontal direction. , In a rubber mount, fixed to each member of the first mounting member and the second mounting member,
It can also be advantageously configured by providing a pair of stopper members facing each other at a predetermined distance in the horizontal direction.

According to a third aspect of the present invention, there is provided a vibration damping device having a structure according to the first or second aspect, wherein in the rubber mount, the main rubber elastic body is connected to the pair of inclined bodies. It is characterized in that both sides disposed between the facing surfaces are substantially independent of each other. In this aspect, the main rubber elastic body elastically connecting the first mounting member and the second mounting member can be constituted only by the main rubber elastic body interposed between the respective inclined facing surfaces. Accordingly, it is possible to set the spring ratio in each of the two horizontal directions perpendicular to each other in the rubber mount to be even larger. In this embodiment, the main rubber elastic body may be independent as long as the elastic deformation is not continuously exerted between the regions interposed between the respective inclined facing surfaces. It extends over each inclined opposing surface along the surfaces of the first and second mounting members for the purpose of improving the moldability of the main rubber elastic body and protecting the surfaces of the first and second mounting members. Such a portion may be provided in the main rubber elastic body.

According to a fourth aspect of the present invention, there is provided a vibration damping device having a structure according to any one of the first to third aspects, wherein the two members extending in the horizontal direction through the center of gravity of the mass member are provided. A plurality of the rubber mounts are disposed so as to be symmetrically positioned with respect to the orthogonal symmetry axis, respectively, and the mounting directions of the rubber mounts are respectively symmetrical with respect to the two symmetry axes. Is set as the characteristic. In the vibration damping device having such a structure according to this aspect, the spring constant can be easily adjusted as a whole of the spring member by changing the mounting direction of the plurality of rubber mounts, and the mounting direction of the plurality of rubber mounts can be changed. Even if the adjustment is performed, the stability of the mass member is advantageously maintained, so that the intended vibration damping effect can be stably obtained.

In this embodiment, among the rubber mounts, it is desirable that the rubber mounts located symmetrically with respect to each symmetry axis be the same. On the other hand, rubber mounts that do not have a symmetric relationship with respect to any of the symmetry axes may have different spring characteristics and structures. In addition, setting the mounting direction of the rubber mount to be symmetrical with respect to two symmetry axes, for example, with respect to any symmetry axis, the rubber mounts disposed at symmetrical positions on both sides of the symmetry axis may be horizontally positioned with respect to the symmetry axis. This can be advantageously achieved by arranging the arrangement angles in the directions such that they are symmetrically the same.

In the fourth aspect, preferably, at least one of the two orthogonal symmetry axes as the symmetry axis of the disposition position of the rubber mount has at least one of them, and more preferably, any one of those two axes. Is set to be the vibration direction in which vibration is to be prevented in the building structure. Further, in this aspect, preferably, two orthogonal symmetry axes as symmetry axes of the arrangement position of the rubber mount are both set as elastic main axes in the horizontal direction of the entire sub-vibration system.
As a result, the stability of the sub-vibration system is further improved, and a desired vibration damping effect can be obtained more stably, and tuning of the sub-vibration system becomes easy.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, in order to clarify the present invention more specifically, embodiments of the present invention will be described in detail with reference to the drawings.

First, FIGS. 1 and 2 show a vibration damping device 10 for a building structure having a structure according to the present invention. The vibration damping device 10 includes a mass body 12 as a mass member,
The mass body 12 includes a plurality of (four in the present embodiment) rubber mounts 14 as spring members for elastically supporting the mass body 12. Such a vibration damping device 10 is housed in an attic space of a two-story house or a three-story house, for example, with respect to a building structure, and is a structural member (not shown) constituting a ceiling of the second or third floor. 5) Support frame attached to
2 is mounted by elastically supporting the mass body 12 via a plurality of rubber mounts 14.

More specifically, the mass body 12 is formed of a high specific gravity material such as a metal, and for example, a material formed of an iron-based or lead-based metal is suitably employed. This mass body 12
The shape is not particularly limited, but generally, a plate shape is preferably adopted, and more desirably, a rectangular plate shape, a polygonal plate shape, a circular plate shape, and the like, in which the height dimension is smaller than the width dimension and A plate having a constant height and having a plurality of symmetry axes in a plane is desirable. By employing the mass body 12 having such a shape, the vibration damping device 10 can be advantageously installed in a state of being housed in a space such as the ceiling on the top floor of a general house, and the rubber mounts 14 can be displaced in the horizontal direction. It is possible to obtain a stable vibration damping action by suppressing the angular displacement caused in the motor. Thereby, each plate-shaped divided mass 16 can be divided and attached or detached, and the total weight of the mass body 12 can be adjusted.

In particular, the mass body 12 is formed by stacking and fastening a plurality of plate-shaped divided masses 16 whose height dimension is sufficiently smaller than the width dimension and which is constant throughout. It is configured. Specifically, for example, a plurality of plate-shaped divided masses 16 obtained by cutting a general rolled steel plate into a flat rectangular plate shape are overlapped and connected and fixed to each other by fastening bolts 56 as fastening means. It has been.

That is, in the present embodiment, as shown in FIG. 5, each of a plurality of plate-shaped divided masses 16 constituting the mass body 12 (central portions of each side in the outer peripheral edge portion) has Mounting holes 54 are formed through the entire plate-shaped divided mass 16 in the plate thickness direction, and fastening bolts 56 are inserted into the respective mounting holes 54. A plurality of plate-shaped divided masses 16 are bundled by the fastening bolts 56 and screwed in the overlapping direction by screwing the nuts 58 to upper ends of the fastening bolts 56 in the axial direction. They are integrally connected and fixed.

The mass of the mass body 12 is appropriately set in consideration of the mass, vibration state, structural strength, and the like of the building structure as the main vibration system to be mounted. In a three-storey house, a total weight of about 100 to 1000 kg or more is set. In addition, the gross weight here is the mass of all the mass bodies 12, and when a single vibration damping device 10 is mounted in consideration of a target vibration damping effect, a housing structure, and the like, This is the mass of one mass body 12 that constitutes one vibration damping device 10, and when the sub-vibration system is configured by a plurality of vibration damping devices, all the vibration damping devices 1
It is grasped as the total mass of the mass body 12 at zero.

On the other hand, each of the rubber mounts 14 has an anisotropic spring constant in the horizontal direction. In this embodiment, four rubber mounts 14 having the same structure are employed. That is, as shown in FIGS. 3 and 4, the rubber mount 14 has a first mounting member 18 as a first mounting member and a second mounting member 20 as a second mounting member.
Are spaced apart from each other and are opposed to each other, and the first fitting 18 and the second fitting 20 are
It has a structure in which it is elastically connected by a main rubber elastic body 22 interposed between the facing surfaces 8 and 20.

In this case, the first mounting member 18 is composed of a rectangular flat plate-like upper plate 24 formed by pressing each steel plate and the like, and a V-shaped lower plate 26 whose center is bent in a valley-fold shape. The lower plate 26 is superimposed on the lower surface of the upper plate 24 so that both edges of the lower plate 26
Are integrally attached by welding. In the center of the upper plate 24, a first mounting bolt 28
Are projected upward. The first mounting bolt 28 is inserted from below into the central insertion hole 30 of the upper plate 24 to form an annular projection 32 integrally formed at the lower end in the axial direction.
Are welded to the lower surface of the upper plate 24.

The second mounting member 20 has a single rectangular plate shape formed by pressing a steel plate or the like, and both sides in the longitudinal direction sandwiching the central plate portion 34 located at the center are formed as follows. The inclined plate portions 36, 36 rise obliquely upward toward the first mounting bracket 18 side (upper side in FIG. 3). Further, a second mounting bolt 38 protruding downward is fixedly provided at the center of the central flat plate portion 34 of the second mounting bracket 20. In addition, the first mounting bracket 1
A central space 35 is formed between the pair of divided blocks 42, 42 at a central portion between the opposing surfaces of the second mounting bracket 20 and the second mounting bracket 20, where a second mounting bolt 38 is provided.
Is inserted from the upper side into the central insertion hole 37 of the central flat plate portion 34 of the second mounting member 20, and the annular projection 39 integrally formed at the upper end portion in the axial direction is welded to the upper surface of the second mounting member 20. ing. Furthermore, the inclined plate portions 27, 27 on both sides of the lower plate 26 in the first mounting member 18, and the inclined plate portions 36, 36 on both sides of the second mounting member 20, respectively, sandwich the mount center axis 40. On both sides, they are opposed to each other in a direction inclined by substantially the same angle with respect to the mount center axis 40 with a substantially constant gap over the entire surface. Further, divided rubber blocks 42, 42 each having a substantially rectangular block shape are interposed between the facing surfaces of the two inclined plate portions 27, 27 and 36, 36, respectively. That is, in the present embodiment, the pair of divided rubber blocks 42, 42 constitute a main rubber elastic body 22 that elastically connects the first mounting member 18 and the second mounting member 20.

That is, the rubber mount 14 of the present embodiment
The elastic main shafts 44, 44 of each of the two independent divided rubber blocks 42, 42 are separated from the mount central axis 40 in one plane including the mount central axis 40 by the mount central axis 40. The rubber mount 14 is generally inclined on both sides of the mount center axis 40 so as to be symmetrical with respect to the mount center axis 40, as shown in FIG.
A vertical elastic main axis extending along the first direction, a horizontal first elastic main axis extending in a direction perpendicular to the plane of the paper in the figure, and a horizontal second elastic main axis extending in the horizontal direction in the figure. I have. In the rubber mount 14 having such a structure, in the direction of the first elastic main axis in the horizontal direction, the main deformation of the main rubber elastic body 22 at the time of load input becomes shear, and the spring constant in the horizontal direction is minimized. On the other hand, in the direction of the second elastic main shaft in the horizontal direction, compression / tensile deformation is caused in the main rubber elastic body 22 when a load is input, and the spring constant in the horizontal direction is maximized. Thus, in the rubber mount 14, the minimum value and the maximum value of the spring constant in the horizontal direction are set in directions orthogonal to each other.

In each of the divided rubber blocks 42, a restraining plate 46 having a plate shape slightly larger than the cross section of the divided rubber block 42 is provided at a substantially central portion in the direction of each of the elastic main shafts 44. It is arranged in a state that extends perpendicularly to. In addition, this restraint plate 4
6 and 46 are formed of a metal material such as a steel plate which is harder than at least the divided rubber block 42, are vulcanized and bonded to the divided rubber block 42, and have a restraining plate 46 sandwiched in the center. Through holes are formed on both sides to connect the divided rubber blocks 42 located in a divided state to each other.

The rubber mount 14 having such a structure
Is, as shown in FIG. 1, the first mounting bracket 1
8 is fixed to the mass body 12, and the second mounting member 20 is fixed to the support frame 52. In the present embodiment, the first mounting bolt 28 is inserted through the lowermost plate-shaped divided mass 16 and is fixed by screwing with the nut 47, and the other plate-shaped divided mass 16 that is superimposed on the first divided bolt 16 And a mounting hole 45 for mounting a nut.

In this embodiment, as shown in FIG. 2, four rubber mounts 14a to 14d are attached to the four corners of the rectangular plate-shaped mass body 12, respectively. On the other hand, as shown in FIG. 1, the second mounting bracket 20 side of the rubber mount 14 is fixed to the structural member of the ceiling on the top floor of the house by a second mounting bolt 38. A nut 55 is fastened and fixed to a support frame 52 as an attachment member from below. In the present embodiment, the support frame 52 is formed using a rolled material of steel or the like, and a pair of channel steels 80, 80 are arranged at a predetermined distance in parallel with each other. (80, 80) and the latter (82, 82) by combining another pair of channel steels 82, 82 extending across the opposing surfaces of the channel steels 80, 80 at a predetermined distance from each other. Are welded to each other. Thereby, the mass body 12 is connected to the structural member of the building structure via the four rubber mounts 14,
It is elastically attached, so that the mass 1
2 is a mass member, and one vibration system is configured with four rubber mounts 14 as spring members. With this vibration system,
A vibration damping device (TMD) 10 that functions as a sub-vibration system for a main vibration system made of a building structure is configured.

When the vibration damping device 10 is mounted, the mass body 12 is supported in a state where the mass body 12 extends in the horizontal direction, and the center axis of each of the rubber mounts 14 is set in the vertical direction. It is arranged in an extended state.

Further, in the vibration damping device 10 of the present embodiment, a plurality of stopper mechanisms 50 are provided between the mass body 12 and the support frame 52. These stopper mechanisms 50
As shown in FIG. 6, an attachment seat plate 51 protruding outward from an outer surface of a bottom wall thereof is welded to an intermediate portion in the longitudinal direction of a stopper main body 49 made of a channel steel as a rigid member. The mounting surface 5, which extends in a direction perpendicular to the axis of the stopper body 49, is provided by the mounting seat plate 51.
3 are formed. A bolt mounting hole 62 is formed in the center of the mounting seat plate 51. The stopper body 49 is disposed on the outer peripheral surface at the center of each side of the mass body 12 so as to extend vertically downward from the mass body 12. Further, the mounting surface 53 of the mounting seat plate 51 is superimposed on the lower surface of the mass body 12, and the fastening bolt 56 for fastening the plate-shaped divided mass 16 is inserted into the bolt insertion hole 62 of the mounting seat plate 51. The mounting seat plate 51 and thus the stopper body 49 are fixedly attached to the mass body 12 by being fastened together with the plate-shaped split mass 16 by the fastening bolts 56. The stopper body 49 is opposed to the outer peripheral surface of the support frame 52 at a predetermined horizontal distance from the outer peripheral surface of the support frame 52 at a portion protruded vertically downward from the mass body 12. When the body 52 abuts on the stopper body 49 fixed to the mass body 12, a stopper mechanism that limits the relative displacement between the mass body 12 and the support frame body 52 is configured. In the present embodiment, a total of four such stopper mechanisms 50 are provided at the central portion of each side of the mass body 12 (see FIG. 2), and they cooperate to form any horizontal elastic main axis direction. In this case, an effective stopper function is exhibited.

Further, in the vibration damping device 10 of the present embodiment, as shown in FIG.
4 are disposed so as to be respectively symmetrically positioned with respect to two symmetry axes X and Y extending in the horizontal direction at right angles to each other in the mass body 12. In the present embodiment, the two axes of symmetry X and Y of the mass body 12 are both inertia main axes extending in the horizontal direction of the mass body 12. Also,
In the elastic support system including the mass body 12 and the four rubber mounts 14, the elastic main axis extending in the vertical direction is set so as to pass through the center of gravity of the mass body 12. In particular,
In FIG. 7, a first rubber mount 14a and a second rubber mount 14b, and a third rubber mount 14c and a fourth rubber mount 14d are respectively symmetrically positioned with respect to a first symmetry axis X. , A first rubber mount 14a and a third rubber mount 14c, and a second rubber mount 14b and a fourth rubber mount 14d.
Are positioned symmetrically with respect to the second symmetry axis Y.

The four rubber mounts 14a to 14a
d is the mounting direction, the two symmetry axes X,
They are set to be symmetrical with respect to Y. Specifically, in FIG. 7, with respect to the first symmetry axis: X, the horizontal reference direction line 6 of the first rubber mount 14a is
The intersection angle of 4a: θxa and the intersection angle of the horizontal reference direction line 64b of the second rubber mount 14b: θxb are the same, and the intersection angle of the horizontal reference direction line 64c of the third rubber mount 14c:
θxc and the horizontal reference direction line 64 of the fourth rubber mount 14d
The intersection angle of d: θxd is set to be the same. Regarding the second axis of symmetry: Y, the intersection angle of the horizontal reference direction line 64a of the first rubber mount 14a: θya and the intersection angle of the horizontal reference direction line 64c of the third rubber mount 14c: θyc
And the angle of intersection of the horizontal reference direction line 64b of the second rubber mount 14b: θyb and the fourth rubber mount 1
The intersection angle θyd of the 4d horizontal reference direction line 64d is set to be the same.

As described above, the four rubber mounts 14a to 14d
When the mounting direction of the rubber mount 14 is set,
Even when the mounting directions of a to d are changed, the mass bodies 12 and 4
The direction of the main elastic axis in the horizontal direction of the entire sub-vibration system including the rubber mounts 14a to 14d is
The first symmetry axis in 2: the direction of X and the second symmetry axis:
It is maintained in the Y direction. The direction of the first axis of symmetry: X and the direction of the second axis of symmetry: Y are respectively the main vibration directions to be damped in a building structure such as a house to be damped, for example, a plane. In the case of a house having a rectangular frame structure, the installation direction of the vibration damping device 10 with respect to the house is determined so as to be parallel to each side. As a result, vibrations in two directions to be damped are input to the vibration control device 10 constituting the sub-vibration system in the direction of the elastic main axis of the vibration control device 10, and the vibrations in the two directions. For each vibration input, an effective vibration damping effect can be exhibited.

Further, in the vibration damping device 10, as described above, the rubber mounts 14a to 14d having the anisotropic spring constant in the horizontal direction perpendicular to the mount center axis 40 are employed as spring members. Such rubber mount 1
By changing the mounting directions of 4a to 4d, two elastic principal axis directions (first symmetric axis: X direction and second symmetric axis: Y direction) serving as input directions of vibration to be damped are provided. Each of the spring constants is changed. Specifically, in the present embodiment, as the value of the intersection angle θx of the rubber mounts 14a to 14d with respect to the first symmetry axis X decreases, the direction of the first symmetry axis X in the vibration damping device 10 decreases. Is changed to a direction in which the spring constant in the direction of the second symmetry axis: Y increases. As a result, by reducing the value of the angle of intersection: θx with respect to the first symmetry axis: X of each of the rubber mounts 14 a to 14 d, the vibration damper 10
In the first symmetry axis: the natural frequency in the direction of X can be shifted to the low frequency side, and the second symmetry axis: the natural frequency in the direction of Y can be shifted to the high frequency side. By increasing the value of the intersection angle θx with respect to the first symmetry axis X of each of the rubber mounts 14a to 14d,
The natural frequency in the direction of the first symmetry axis X can be shifted to the high frequency side, and the natural frequency in the direction of the second symmetry axis Y can be shifted to the low frequency side.

Therefore, in the vibration damping device 10 having the above-described structure, the input direction of the vibration to be damped in the vibration damping device 10 can be achieved without replacing or changing any of the rubber mounts 14 as the spring members. It is possible to adjust and change the spring constant ratio in the directions of the two elastic principal axes, and the tuning frequency ratio in the directions of the two elastic principal axes.

Further, in such a vibration damping device 10,
A mass body 12 as a mass member and a rubber mount 14 as a spring member are formed in consideration of the type and structure of the building structure,
By roughly setting in advance, none of the mass body 12 and the rubber mount 14 can be replaced without replacement.
Simply by changing the mounting direction (installation direction) of the rubber mount 14, the tuning frequency can be adjusted in accordance with the vibration in question, taking into account the type of building structure to be mounted, the environment, and the like. Therefore, an effective vibration damping effect can be obtained easily, with high accuracy, and at low cost. This is, in particular,
This is extremely effective when tuning is changed due to aging or the like after installing the vibration damping device 10, and the optimum tuning state can be easily realized and maintained by re-tuning.

Further, in the above embodiment, since the spring member for elastically supporting the mass body 12 is constituted only by the anisotropic rubber mount 14, the mounting directions of all the rubber mounts 14 are interlocked. In this case, there is an advantage that a wider tuning range of the natural frequency of the sub-vibration system by changing the mounting direction of the rubber mount 14 is secured.

In particular, in the vibration damping device 10 having the structure according to the present embodiment, the rubber mount 14 having the specific structure as described above is employed, so that the spring ratio in two directions orthogonal to each other in the horizontal direction can be sufficiently increased. While securing large,
The thickness dimension of the main rubber elastic body 22 can be set to be large even in a direction in which shear deformation is mainly generated (vertical direction in FIG. 4), and therefore, for example, when the vibration damping device 10 is installed. Even when a large load is applied when the mass body 12 is placed, buckling deformation of the main rubber elastic body 22 can be advantageously prevented.

Further, since the mass body 12 is easy to manufacture and can be divided into small (thin) pieces for each plate, each plate-shaped divided mass 16 can be divided and attached or detached. The loading and installation of the vibration damping device 10 is easy, and the adjustment of the mass can be easily performed. In addition, in the present embodiment, since the stopper mechanism 50 that limits the relative displacement amount between the mass body 12 and the support frame body 52 is configured, the amount of deformation of the main rubber elastic body 22 is limited. Buckling deformation of the main rubber elastic body 22 can be more advantageously prevented. As a result, a rubber mount having a large spring ratio can be employed stably, and the effect of the mount having the specific structure as described above can be more effectively obtained.

The embodiment of the present invention has been described in detail above, but this is merely an example, and the present invention is not limited at all by the specific description in the embodiment.

For example, in the above-described embodiment, the vibration damping device adopting a steel plate formed of a metal material as the plate-shaped divided mass has been described. It is also possible to form divided masses.

The number and arrangement of the rubber mounts used as the spring members are not limited at all.
Some of the rubber mounts may have a substantially constant spring constant in any horizontal direction.

Even when the rubber mount having the structure according to the present invention as in the above embodiment is employed, when tuning the spring ratio, some of them are fixed in the mounting direction, and only the other specific rubber mount is mounted at the center of the mount. Tuning may be performed by rotating around an axis.

Further, the number of the constraining plates 46 provided in the main rubber elastic body 22 is not limited. For example, in each of the divided rubber blocks 42, a plurality of the constrained plates may be provided separated from each other in the elastic main axis direction. Alternatively, it is also possible not to provide such a restraining plate 46.

The mounting direction of the rubber mount is not limited. In each of the rubber mounts in the above embodiment, the first mounting bracket 18 is supported upside down in the vertical direction (mount center axis direction). The second fitting 20 may be attached to the mass body 12 while being attached to the body 52.

Further, in order to maintain the mounting direction of the rubber mount, the first mounting member 18 and the second mounting member 20 are used.
At least one of the mass body 12 or the support frame 52
It is also effective to employ removable fixing means such as bolts and pins for positioning and fixing to the (building structure).

Further, in the vibration damping device according to the present invention, a damping device capable of exerting a damping force when the mass body 12 is displaced with respect to the building structure (the support frame 52) can be adopted as necessary.

Further, the arrangement position of the vibration damping device 10 can be appropriately changed in consideration of the structure of the building structure, the vibration mode, and the like, such as the ceiling portion on the top floor of the building structure and the underfloor portion. is there.

In addition, the present invention is applicable to vibration damping devices for various building structures such as offices, warehouses, buildings, and towers, in addition to general houses having one or more floors or two or more floors. It goes without saying that it is applicable.

In addition, although not enumerated one by one, the present invention
Based on the knowledge of those skilled in the art, the present invention can be implemented in a form in which various changes, modifications, improvements, and the like are made.
It goes without saying that all such embodiments are included in the scope of the present invention without departing from the spirit of the present invention.

[0061]

As is apparent from the above description, in the vibration damping device having the structure according to the present invention, the mounting direction of the rubber mount is changed around the center axis of the mount so that the sub-vibration system becomes orthogonal to the sub vibration system. The spring ratio in two directions, and consequently the natural frequency ratio, can be tuned easily and with high accuracy, and therefore, a good vibration damping effect can be easily achieved for the vibration to be damped in the building structure. And it can be obtained stably.

Further, since the mass body is constituted by stacking a plurality of plate-shaped divided masses on each other in the vertical direction, the total weight of the mass body can be easily adjusted. A dramatic improvement in efficiency can be achieved, and buckling change and damage of the rubber mount when installing the mass member can be advantageously avoided, and the effect of adopting the rubber mount of the specific structure as described above is more stable It can be demonstrated.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a vibration damping device as one embodiment of the present invention, and is a view corresponding to a II section in FIG.

FIG. 2 is a plan view of the vibration damping device shown in FIG.

FIG. 3 is a front view of a rubber mount employed in the vibration damping device shown in FIG.

FIG. 4 is a plan view of the rubber mount shown in FIG. 3;

FIG. 5 is a sectional view taken along line VV in FIG. 2;

FIG. 6 is a perspective view of a stopper fitting included in the vibration damping device shown in FIG.

FIG. 7 is a schematic plan view of the vibration damping device shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Vibration suppression device 12 Mass body 14 Rubber mount 16 Plate-shaped divided mass 18 First mounting bracket 20 Second mounting bracket 22 Main body rubber elastic body 40 Mount center axis 42 Split rubber block 50 Stopper mechanism 52 Support frame

Continuing on the front page (72) Inventor Isao Natsuhori Komaki City, Aichi Prefecture, 3600 Gezu, Kita-gaiyama Tokai Rubber Industries Co., Ltd. (72) Inventor Masaaki Hirano 3600, Gezu, Kitagaiyama, Koga-shi, Aichi Within Industrial Co., Ltd. (72) Inventor Toyohiko Higashida 1-1-88 Oyodonaka, Kita-ku, Osaka City, Osaka Prefecture Sekisui House Co., Ltd. F-term (reference) 3J048 AA06 AD07 BF02 BF17 CB22 EA38 3J059 AA10 BA62 BB02 BC06 BD05 DA23 GA50

Claims (4)

[Claims] 1. A vibration damping device that forms a sub-vibration system for a building structure by elastically supporting a mass member with a spring member on the building structure, wherein the spring member is connected to the building structure and the building structure. A first mounting member attached to any one of the mass members and a second mounting member attached to the other mass member are configured to include a plurality of rubber mounts connected by a main rubber elastic body. For the mounting member and the second mounting member, a pair of inclined opposing surfaces are provided on both sides of the mount central axis extending in the vertical direction and opposed in an inclined direction substantially symmetric with respect to the mount central axis, and The main rubber elastic body is disposed between the pair of inclined opposing surfaces, and the opposing inclined opposing surfaces are connected by the main rubber elastic body, while the mass members are mutually overlapped in the vertical direction. Vibration suppression apparatus, characterized by being configured by keyed plurality secured to the plate-like divided mass. 2. A stopper mechanism for limiting a relative displacement amount of the mass member with respect to the building structure.
6. The vibration damping device according to 1. 3. The vibration damper according to claim 1, wherein the rubber elastic body in the rubber mount is substantially independent of each other at both side portions disposed between the pair of inclined opposing surfaces. apparatus. 4. A plurality of rubber mounts are provided so as to be symmetrically positioned with respect to two orthogonal symmetry axes extending in the horizontal direction through the center of gravity of the mass member. The vibration damping device according to any one of claims 1 to 3, wherein a mounting direction of the mount is set to be symmetrical with respect to each of the two symmetry axes.