JP3295948B2 - Dynamic vibration absorber - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention attenuates any cause of a building, an apartment house, a bridge, and a structure such as a machine body and its foundation, for example, forced vibration due to wind or earthquake as quickly as possible. The present invention relates to a vibration damper, a so-called dynamic vibration absorber (dynamic damper).

[0002]

2. Description of the Related Art This kind of dynamic vibration absorber generally comprises a coil spring member, a weight connected to the coil spring member, an energy absorbing device for absorbing vibration energy of the weight, and
A sliding guide member for preventing unintentional swing of the weight during the vibration damping operation, particularly rotation in a horizontal plane, and guiding the original vibration of the weight.

[0003]

As described above, the conventional dynamic vibration absorber has the sliding guide member for the weight, and the guide surface of the sliding guide member for the weight is not sufficiently smooth. Then, the vibration of the weight is transmitted to the structure supporting the sliding guide member via the sliding guide member. This structure is in most cases the object that is currently actually trying to damp the vibrations, and thus may cause secondary vibrations in the structure described above. Also, when the sliding guide member is provided, the vibration having a small acceleration cannot overcome the frictional resistance between the weight and the sliding guide member,
As a result, in such vibration, the vibration energy of the weight is transmitted to the sliding guide member without being absorbed by the energy absorbing device, and the vibration having a small acceleration generated in the structure is not effectively attenuated after all. Become.

The present invention has been made in view of the above-mentioned points, and an object thereof is to effectively attenuate the vibration of a structure without using a sliding guide member. It is an object of the present invention to provide a dynamic vibration absorbing device which does not require much space and can effectively absorb vibration particularly in a horizontal direction.

[0005]

SUMMARY OF THE INVENTION According to the present invention, the object is to provide a weight and a displacement energy between the weight and the structure, the relative displacement energy of the weight relative to the structure in a horizontal plane. An energy absorbing device for absorbing the energy and the energy absorbing device
Ri enclosing disposed between the weight and the structure, a plurality of support devices for supporting the weight on the structure to permit relative displacement in the horizontal plane of the weight with respect to the structure, the weight One end is connected to the weight and the other end is connected to the structure to prevent relative rotation of the weight with respect to the structure in the horizontal plane and adjust the natural oscillation period. The leaf spring device has a first leaf spring member having one end connected to the weight, one end connected to the structure, and the other end connected to the structure. A plurality of second leaf spring members connected to the other end of the first leaf spring member, wherein the first and second leaf spring members exist in directions in which their plate surfaces intersect each other. And a plurality of first leaf spring members are arranged in a plurality of rows along a first direction parallel to a horizontal plane. Are arranged, the plurality of second plate spring members are arranged along a second direction intersecting the first direction be parallel to the horizontal plane with a plurality of rows,
The energy absorbing device is connected to the structure to collect the viscous fluid.
Container and its relative displacement in the horizontal plane with respect to this container
Shear resistance from viscous fluid contained in a container
The container is spaced apart from the container to receive the force.
And a resistance force receiving member connected to the weight
And between the first and second leaf spring members,
A plate member having a through hole in the center is interposed, and the first and
The other end of each of the second leaf spring members is attached to the leaf member.
Are connected to each other and the plate members are
The energy absorbing device is a through hole in the plate member
Maximum relative displacement to the plate member through
This is achieved by a dynamic vibration absorber arranged with a gap corresponding to the position .

In one preferred embodiment of the present invention, an energy absorbing device is connected to a structure and stores a viscous fluid such as silicone oil, and is stored in the container at a relative displacement in a horizontal plane with respect to the container. And a resistance receiving member disposed in the container at a distance from the container and connected to the weight so as to receive a viscous shear resistance from the viscous fluid.

In the present invention , the supporting device is fixed to the weight.
The upper ball receiving member and the lower ball fixed to the structure
Between the ball receiving member and the upper and lower ball receiving members
And a placed steel ball .

[0008]

In the present invention, the first and second leaf spring members are:
The plate surfaces are arranged so as to exist in directions intersecting with each other. In a particularly preferred example, the plate surfaces are arranged so as to be orthogonal to each other.

[0010]

The dynamic vibration absorber of the present invention is installed on a building, for example, on the roof of a building. When the building in which the dynamic vibration absorbing device of the present invention is installed bends due to wind or the like and the upper floor portion is going to vibrate in a substantially horizontal direction, the weight also starts to vibrate in the horizontal plane with respect to the building roof floor. In the vibration of the weight, the leaf spring device and the energy absorbing device connected thereto act to cause the weight to vibrate with a phase shift of approximately 90 degrees with respect to the vibration of the structure, thereby damping the vibration of the building. . After the vibration of the building is attenuated, the energy absorbing device acts to attenuate the vibration of the weight as quickly as possible, and the vibration of the weight does not cause the building to vibrate on the contrary. In the dynamic vibration damping device of the present invention, since the leaf spring device is connected to the weight at one end and to the structure at the other end, the horizontal surface of the weight with respect to the building roof floor without sliding frictional resistance. As a result, the weight can be prevented from rotating relative to the inside, and the weight can be linearly moved in the horizontal plane by the vibration, so that the vibration can be effectively attenuated.

The present invention will be described below based on preferred embodiments shown in the drawings. This will clarify the invention described above and other inventions. It should be noted that the present invention is not limited to these specific examples.

[0012]

1 and 2, a dynamic vibration absorber 1 is arranged between a concrete weight 2, a weight 2 and a structure, for example, a building roof floor 3, and a building roof floor 3 is provided. An energy absorbing device 4 that generates a viscous shear resistance force in a relative displacement of the weight 2 in a horizontal plane with respect to the weight 2 and absorbs a relative displacement energy of the weight 2 in a horizontal plane; It is located between and has a weight 2 for the building roof floor 3
And a supporting device 5 for supporting the weight 2 on the building roof floor 3 by allowing relative displacement in a horizontal plane of the building, and between the weight 2 and the building roof floor 3. A leaf spring device 6 for preventing the relative rotation of the weight 2 in the horizontal plane and adjusting the natural oscillation period is provided.

As shown in FIGS. 3 and 4, an energy absorbing device 4 arranged substantially at the center of the lower surface of the weight 2 is connected to a building roof floor 3 and accommodates a viscous fluid 7 and a container 8. And the weight 2 is arranged in the container 8 at a distance from the viscous fluid 7 contained in the container 8 at a relative displacement in a horizontal plane with respect to And a resistance force receiving member 9 connected to. The container 8 includes a cylindrical portion 10 and a disk portion 11 integrally formed with the cylindrical portion 10. The disk portion 11 has a through hole 12 formed therein. Are fixedly connected to the building roof floor 3. The resistance force receiving member 9 faces the disk portion 11 of the container 8 with a minute gap, and is formed integrally with the disk-shaped resistance plate portion 13 disposed in the viscous fluid 7. Resistance plate part 1
3 and the cross-reinforcing rib 1
4, a through hole 16 is formed in the mounting plate 15, and the resistance receiving member 9 is attached to the weight 2 by a bolt or the like inserted into the through hole 16. Fixed and connected.

As shown in FIGS. 5 and 6, eight supporting devices 5 surrounding the energy absorbing device 4 are disposed in the present embodiment, respectively.
A holding plate 20 having a plurality of through holes 19 for holding balls arranged between the ball housing members 17 and 18;
A steel ball 21 rotatably mounted in each of the through holes 19 is provided.
And 23, and steel balls 21 arranged in the cylindrical portions 22 and 23.
Supporting plate portions 24 and 25 that come into contact with cylindrical portions 22 and 23
The mounting plate portions 27 and 28 are provided with through holes 29 and 30, respectively. The mounting plate portions 27 and 28 are provided with through holes 29 and 30, respectively. The upper and lower ball housing members 17 and 18 are fixedly connected to the weight 2 and the building roof 3 respectively.

As shown in FIG. 7, the leaf spring device 6 comprises a plurality of first leaf spring members 33 fixed at one end 31 to the weight 2 by bolts or the like inserted into the through holes 32 and connected thereto.
A plurality of second leaf spring members 36 each having one end 34 fixed to and connected to the building rooftop 3 with bolts or the like inserted into the through holes 35, are disposed between the leaf spring members 33 and 36. A rigid spring support plate member 37 as a plate member is provided, and the other ends 38 and 39 of the leaf spring members 33 and 36 bent into a U-shape are respectively provided with through holes 40 ( The other end 39 is fixedly connected to the spring support plate member 37 by a bolt or the like inserted into the other end (not shown). In this manner, the other ends 38 and 39 of the leaf spring members 33 and 36 are attached to the spring support plate member 37 and connected to each other. A reinforcing plate 41 is integrally attached to one end 31 and 34 and the other end 38 and 39 of the leaf spring members 33 and 36, respectively. The leaf spring members 33 and 36 are arranged so that their plate surfaces are present in a direction intersecting each other, in this example, in a direction orthogonal to each other. The plurality of leaf spring members 33 are regularly arranged in a horizontal plane with a plurality of rows. The leaf spring members 36 are arranged on the upper surface of the support plate member 37 along the X direction.
7 are provided along the Y direction on the lower surface.
That is, the plurality of leaf spring members 33 allow relative displacement of the weight 2 with respect to the spring support plate member 37 in the horizontal plane in the horizontal direction, while allowing the weight 2 to move in the X direction with respect to the spring support plate member 37 in the horizontal plane. The plurality of leaf springs are connected to the weight 2 and the spring support plate member 37 and arranged between the weight 2 and the spring support plate member 37 so as to prevent relative displacement in the orthogonal Y direction. The member 36 allows relative displacement of the spring support plate member 37 in the Y direction in the horizontal plane with respect to the building roof floor 3, while allowing the spring support plate member 37 to move relative to the building roof floor 3.
Is connected to the spring support plate member 37 and the building roof floor 3 and is disposed between the spring support plate member 37 and the building roof floor 3 so as to prevent relative displacement in the X direction in the horizontal plane with respect to. A through hole 42 is formed at the center of the spring support plate member 37 surrounded by the plurality of support devices 5, and the energy absorbing device 4 passes through the through hole 42 and at the through hole 42. 37 are arranged with a gap corresponding to the maximum relative displacement.

In the dynamic vibration absorber 1 thus formed,
The weight 2 is supported on the building roof floor 3 movably in a horizontal plane with respect to the building roof floor 3 by the steel balls 21 of the support device 5. When the building is shaken by the wind or the like and the building roof floor 3 vibrates in, for example, the X direction, the weight 2 also vibrates in the X direction. In this vibration, a phase difference of approximately 90 degrees occurs between the building roof floor 3 and the weight 2 due to a difference in mass between the weight 2 and the building, a spring constant of the leaf spring device 6, and a resistance force of the energy absorbing device 4. Accordingly, the weight 2 vibrates in the direction of canceling the vibration of the building roof floor 3 with respect to the building roof floor 3 to attenuate the vibration of the building roof floor 3. After the vibration of the building is attenuated, the resistance plate portion 13 of the energy absorbing device 4 is relatively displaced in the X direction with respect to the container 8, and as a result, viscous shear resistance is generated in the viscous fluid contained in the container 8, Vibration energy of the weight 2 is absorbed through the resistance plate portion 13 that receives the viscous shear resistance. Therefore, even if the building shakes due to the wind or the like, the vibration is absorbed, that is, absorbed as quickly as possible. In the vibration in the X direction, as shown in FIG. 8, the relative displacement of the weight 2 with respect to the spring support plate member 37 in the X direction due to elastic deformation while maintaining the U-shape of the leaf spring member 33, in other words, For example, the relative displacement of the weight 2 in the X direction with respect to the building roof floor 3 is allowed. Even if the building vibrates in the Y direction, the vibration is absorbed by the dynamic vibration absorber 1 as quickly as possible. In this case, the leaf spring member 36 is used.
The relative displacement of the weight 2 in the Y direction with respect to the building roof floor 3 is allowed by the elastic deformation while maintaining the U-shape.

Each of the leaf spring members 33 of the dynamic vibration absorbing device 1 is provided with its wide plate surface disposed so as to be hardly deformed by the relative displacement of the weight 2 in the Y direction. Each of the spring members 36 is provided with its wide plate surface arranged so as to be hardly deformed by the relative displacement of the weight 2 in the X direction. For example, the energy absorbing device 4 is provided during vibration damping. Even if the relative rotation in the R direction about the center is to occur in the weight 2, it is prevented by the leaf spring members 33 and 36, and as a result, the weight 2 cannot swing in the R direction. That is, the dynamic vibration absorber 1 can guide the relative displacement of the weight 2 in the vibration direction in which vibration is to be absorbed without using sliding friction resistance or the like. Therefore, various problems caused by the occurrence of sliding frictional resistance can be eliminated. The adjustment of the spring constant of the leaf spring device 6 can be easily performed by increasing or decreasing the leaf spring members 33 and 36. And since the leaf spring members 33 and 36 are arranged between the weight 2 and the building rooftop 3, the occupied area is not so much required.
Therefore, it can be installed compactly on the roof of a building.

In the dynamic vibration absorber 1, the leaf spring members 33 and 36 are used, and the spring support plate member 37 is interposed therebetween to absorb the vibrations in the X and Y directions. However, the present invention is not limited to this. For example, one end 31 of the leaf spring member 33 is
8 may be directly connected to the building roof floor 3 to absorb vibration only in the X direction or only in the Y direction. On the other hand, in the specific example, the two-layered dynamic vibration absorber 1 is used for the leaf spring member. Alternatively, three or more leaf spring members may be provided.
In the meantime, members corresponding to the spring support plate members 37 are arranged, respectively, so that vibrations in three or more directions other than the X direction and the Y direction, for example, the Z direction having an angle of 45 degrees with respect to the X direction and the Y direction are provided. It is also possible to use a dynamic vibration absorber capable of absorbing the vibration. Also, the leaf spring members 33 and 36
It is preferable to use a multi-layered elastic plate sandwiching a viscoelastic member such as rubber since a vibration absorbing effect can be further obtained.

[0019]

As described above, according to the present invention, the leaf spring is connected to the weight at one end and connected to the structure at the other end to prevent the weight from rotating relative to the structure in the horizontal plane. As a result of the provision of the device, the relative rotation of the weight with respect to the structure in the horizontal plane can be prevented without accompanying the sliding frictional resistance, and the linear movement of the weight in the horizontal plane due to vibration can be achieved. Vibration can be effectively attenuated. In addition, since a leaf spring device as a guide member can be arranged between the weight and the structure, the occupied area is not so much required, so that the structure can be compactly applied to the structure.

[Brief description of the drawings]

FIG. 1 is a plan view of one preferred embodiment of the present invention.

FIG. 2 is a side view of the specific example shown in FIG.

FIG. 3 is a detailed side view of the energy absorbing device of the specific example shown in FIG.

FIG. 4 is a detailed plan view of the energy absorbing device of the specific example shown in FIG.

FIG. 5 is a detailed side view of the support device of the specific example shown in FIG. 1;

FIG. 6 is a detailed plan view of the support device of the specific example shown in FIG.

FIG. 7 is a detailed perspective view of the leaf spring device of the specific example shown in FIG.

FIG. 8 is an operation explanatory view of the leaf spring member shown in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dynamic vibration absorbing device 2 Weight 3 Building rooftop 4 Energy absorption device 5 Support device 6 Leaf spring device

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16F 15/02-15/08 E04H 9/02 341

Claims (2)

(57) [Claims] And 1. A weight is disposed between the weight and the structure, and the energy absorption device for absorbing the relative displacement energy in the horizontal plane of the weight with respect to the structure, the energy intake
Placed between the weight and the structure surrounding the collecting device ,
A plurality of support devices for supporting the weight on the structure by allowing relative displacement of the weight in the horizontal plane with respect to the structure, and being disposed between the weight and the structure, A leaf spring device having one end connected to the weight and the other end connected to the structure is provided to prevent relative rotation in the horizontal plane and adjust the natural oscillation period. A first leaf spring member having one end connected to the weight, and a second leaf spring having one end connected to the structure and the other end connected to the other end of the first leaf spring member. A plurality of first leaf spring members, and the first and second leaf spring members are arranged such that their plate surfaces are present in a direction intersecting with each other. The spring members are arranged in a plurality of rows along a first direction parallel to a horizontal plane, and include a plurality of second leaf spring portions. Are arranged along a second direction intersecting be parallel to the horizontal plane with a plurality of rows in a first direction, the energy absorbing device, the viscosity is linked to the structure
A container containing an ionic fluid, and a
In relative displacement, the viscous fluid contained in the container
Space between the container and the container so as to receive shear resistance.
And the resistance force connected to the weight
And a first and second leaf spring member comprising a receiving member.
A plate member with a through hole at the center is interposed between them.
The other end of each of the first and second leaf spring members is a plate member.
Are attached to each other and are connected to each other.
The energy absorbing device is surrounded by a support device
Through the through hole of the member and at the through hole to the plate member
Dynamic vibration absorber with a gap corresponding to the maximum relative displacement . 2. A supporting device comprising: an upper ball receiving member fixed to a weight; a lower ball receiving member fixed to a structure; and a steel ball disposed between the upper and lower ball receiving members. dynamic vibration absorber according to claim 1 which comprises a.