JP2001182368A - Damper for building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrict the direction of displacement of a weight member 5 without impairing damping action for small vibration thereby enhancing the vibration damping performance and preventing increase in equipment cost and maintenance burden accompanied to the above in damping equipment A for a building which is installed on beams, roof or the like of a single-family house. SOLUTION: The weight member 5 is borne by a high damping laminated rubber 3 so as to give a restoring force and a damping force in the horizontal direction. While the displacement in horizontal direction of the weight member is permitted in one direction, other directions have to be restricted and, for this purpose, a leaf spring 7 is arranged. Flange members 6 are arranged at both the upper and lower end portions of the high damping laminated rubber 3, and the leaf spring 7 is attached to the flange member 6 and one united unit 9 is formed.

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 for buildings, and more particularly to reducing unpleasant horizontal vibrations (small vibrations) caused by strong winds and traffic vibrations in small buildings such as houses. It belongs to the technical field of a vibration damping device suitable for performing vibration control.

[0002]

2. Description of the Related Art Conventionally, as a vibration damping device for a building of this type, Japanese Patent Application Laid-Open No. 8-128228 and Japanese Patent Application Laid-Open No.
As disclosed in Japanese Patent No. 8229, there is known a structure in which a vibration system which elastically supports a weight member is attached to a building to attenuate the swing of the building.

That is, in the apparatus disclosed in Japanese Patent Application Laid-Open No. 8-128229, a rod-shaped weight is supported on a bracket via a plurality of laminated rubbers, and the weight is vibrated minutely by the restoring force of the laminated rubber. The vibration is attenuated by a damping material provided between the weight and the bracket. Also, in this device, in order to effectively propagate the vibration of the building to the weight, it is necessary to adjust the natural frequency of the vibration of the weight to be substantially equal to the natural frequency of the building. Coil spring is interposed between the weight and the bracket.

[0004]

However, in the above-mentioned conventional vibration damping device, it is necessary to provide not only a laminated rubber but also an attenuating material between the weight and the bracket, so that the number of parts increases and the cost is reduced. Is difficult.

In general, the natural frequency of a building differs depending on the input direction of the vibration. In the conventional vibration damping device, the natural frequency of the vibration of the weight is adjusted in accordance with one of the directions. However, no measures are taken against vibrations in other directions. That is, in the above-described conventional vibration damping device, the coil spring is disposed so as to extend in the longitudinal direction of the rod-shaped weight, and only the natural frequency when the weight vibrates in this one direction is adjusted. When the weight vibrates in a direction other than the one direction, not only the other direction but also the one
As for the vibration component in the direction, sufficient damping performance cannot be obtained.

On the other hand, it is conceivable that the horizontal displacement of the weight is restricted to only the one direction by using a slide bearing, a rail, or the like. In this case, when the building vibrates in the horizontal direction, it is conceivable. It is considered that at least the vibration component in the one direction can be effectively attenuated.

However, when a slide bearing or the like is used as described above, the cost of the apparatus is remarkably increased, and the frictional resistance is increased and the movement of the weight is slowed. become. In addition, since the frictional resistance of the slide bearing and the like greatly fluctuates due to the dirt on the frictional surface, there is a problem that the maintenance burden increases.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a vibration damping device for a building having a weight member elastically supported therein, and a vibration damping action for a minute vibration. It is an object of the present invention to limit the displacement direction of the weight to one direction without impairing the vibration, to enhance the vibration damping performance, and to prevent an increase in the cost of the apparatus and an increase in the maintenance burden.

[0009]

In order to achieve the above object, according to the present invention, a weight member is supported by an elastic bearing member made of a high damping laminated rubber, and a horizontal displacement of the weight member is allowed in one direction. On the other hand, a leaf spring was provided so as to restrict the other directions.

More specifically, the invention of claim 1 provides a vibration system comprising a weight member and an elastic support member for elastically supporting the weight member so as to be capable of being displaced in a horizontal direction. It is assumed that a vibration damping device for a building that reduces horizontal vibration of the building is used. The elastic bearing member is made of a high-damping laminated rubber that imparts a horizontal restoring force and a damping force to the weight member. In addition, while allowing the horizontal displacement of the weight member in one direction, The leaf spring is arranged so as to limit the direction of the leaf spring.

According to the above structure, when vibration is input to the building, the weight member is displaced in the horizontal direction while receiving the restoring force of the high-damping laminated rubber, and vibration energy is consumed by the deformation of the high-damping laminated rubber at this time. Thus, the vibration of the building is damped. That is, since not only the restoring force but also the damping force can be given to the weight member by the high damping laminated rubber, it is not necessary to provide a separate damping material,
The number of parts can be reduced.

The horizontal displacement of the weight member is allowed in one direction defined by the leaf spring, but is restricted in the other direction. The vibration component in the direction can be effectively attenuated. Moreover, even if a leaf spring is provided, the frictional resistance does not increase as in the case of a slide bearing or the like, so that the vibration damping action against minute vibrations is not impaired, and the cost of equipment and the burden of maintenance are increased. Absent. Further, by adjusting the number and strength of the leaf springs, the natural frequency of the vibration of the weight member can be easily adjusted.

According to the second aspect of the present invention, one end of the leaf spring is fixed to the weight member side and the other end is fixed to the building side, and the leaf spring is moved with respect to the allowable direction of horizontal displacement of the weight member. It shall be arranged so as to be substantially orthogonal. By doing so, the horizontal displacement of the weight member can be allowed in a direction substantially perpendicular to the leaf spring, but can be prevented in other directions.

According to a third aspect of the present invention, flange members are disposed at both ends in the laminating direction of the high attenuation laminated rubber according to the second aspect of the present invention, and both end portions of the leaf spring are fixed to the two flange members, respectively. Configuration. According to this configuration, the high-damping laminated rubber and the leaf spring become an integrated unit via the flange member, and the allowable direction of the horizontal displacement of the weight member can be easily changed only by changing the mounting angle of this unit. Can be set.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show a vibration damping device A for a building according to an embodiment of the present invention. This vibration damping device A has a compact size and shape which can be installed on, for example, a roof beam or a roof of a house. This is particularly suitable for damping small buildings.

In each of the drawings, reference numeral 1 denotes a plate-shaped center frame having a length extending in the entire longitudinal direction of the vibration damping device A (Y direction in the drawing; hereinafter, also simply referred to as Y direction).
At both ends in the longitudinal direction of the center frame 1, the mounting base plates 2, 2 extend in a width direction (X direction shown in the drawings: hereinafter, also simply referred to as X direction), respectively, which is orthogonal to the center frame 1 in plan view. 2 is fixed, and the damping device A is attached to a predetermined place of the building by the attachment base plates 2 and 2.

On the upper surfaces of the mounting base plates 2 and 2, two high-attenuation laminated rubbers 3 and 3 are spaced apart from each other by a predetermined distance in a vertical direction (Z direction shown in the figure;
), And the four corners of the steel-made side frame 4 are supported by the high-damping laminated rubbers 3, 3,.
Two plate-shaped weight members 5, 5 are arranged apart from each other in the Y direction. That is, the weight members 5, 5
Are elastically supported so as to be displaceable in the horizontal direction by a total of four high-damping laminated rubbers 3, 3,. A direction restoring force and a damping force are applied.

The high-damping laminated rubber 3 is obtained by mixing carbon into the rubber compound to impart a damping property to itself. Its structure is the same as that of ordinary laminated rubber. And laminated alternately in the axial direction,
It is formed into a cylindrical shape by vulcanization bonding. FIG.
As shown in FIG. 5, rectangular plate-like flange members 6 and 6 are disposed at both upper and lower ends of the high-damping laminated rubber 3, and a bolt hole 6 a penetrating vertically is formed in the center of the flange member 6. The upper and lower ends of the high-damping laminated rubber 3 are respectively connected to the side frames 4 (weight member side) by bolts (not shown) via flange members 6 and 6, respectively.
And it is configured to be fastened and fixed to the mounting base plate 2 (building side).

Further, when viewed along the X direction as shown in FIG. 5, the left and right sides of the high damping laminated rubber 3 are provided with leaf springs 7, 7 for regulating the horizontal displacement of the weight members 5, 5. Are arranged. The leaf springs 7, 7 are arranged so as to be substantially perpendicular to the Y direction, and the upper end is fastened to the side of the upper flange member 6 by bolts 8, while the lower end of the lower flange member 6 is closed. The side members are fastened by bolts 8, whereby the displacement of the weight members 5, 5 in the Y direction is allowed, while the displacement in the X direction is prevented.

Further, as described above, the high damping laminated springs 3 and 2
The leaf springs 7, 7 are connected to each other through the flange members 6, 6.
The weight members 5 and 5 can be set in an allowable horizontal displacement direction by rotationally displacing the unit 9 about a vertical axis (Z-direction axis).

For the rubber compounding of the high attenuation laminated rubber 3, for example, natural rubber, isoprene rubber, chloroprene rubber, ethylene propylene rubber, butyl rubber, butadiene rubber and the like are used. The rubber compound may be any as long as it can impart appropriate restoring force and damping force to the weight members 5 and 5. However, in a small-scale building such as a house, the weight is relatively light, It is considered that the mass ratio between the vibration system (sub-vibration system) of the device A and the vibration system (main vibration system) composed of the building itself is about μ = 0.005 to 0.02. The loss coefficient of the high damping laminated rubber 3 is in the range of 0.08 to 0.17. Further, the loss coefficient is preferably from 0.10 to 0.15. This is because if the loss coefficient is too small, the damping property is insufficient, while if the loss coefficient is too large, permanent distortion is likely to occur, and the restoring property is insufficient.

The side frame 4 is formed by combining six members obtained by bending a steel plate along the longitudinal direction, and the longitudinal direction (Y direction) of each of the side frames 4 is in the longitudinal direction of an L-shaped cross section. The members 4a, 4a are arranged, and both ends of the two longitudinal members 4a, 4a extend in the width direction (X direction).
b and 4b are connected to each other. Each of the width direction members 4b, 4b has a U-shaped cross section that opens downward, and has a flange member 6, 6,. Has been fixed through. Although not shown in detail, the weight members 5 and 5 are formed by stacking a plurality of plates each having a predetermined weight and integrally fixed by bolts or the like. The total weight can be reduced by changing the number of plates to be combined. The weight of one weight member 5 is approximately 100 in this embodiment.
It is adjusted to be kg.

Further, in FIG. 1 to FIG.
Reference numeral 8 denotes a casing which is formed large so as not to hinder the vibration of the weight members 5 and 5.
Are mounted on the upper surfaces of the weight members 5 and 5 so as to cover the entire vibration damping device A.

When the vibration damping device A as described above is installed on a beam of a building, for example, first, a beam having a size and strength that allows the vibration damping device A to be arranged in the building is determined. Then, for example, in two directions, that is, the direction in which the beam extends and the direction orthogonal to the direction in the horizontal plane, the natural frequency of the horizontal vibration of the building is calculated by calculation, and the two vibration damping devices A The weights of the weight members 5, 5 are adjusted so that the natural frequencies of the vibration system are approximately equal to the two calculated natural frequencies, respectively.
The two vibration damping devices A are arranged side by side on a beam of a building.

Here, as shown in FIGS. 1 to 3, one of the two vibration damping devices A has a high damping force so that the weight members 5 and 5 vibrate in the longitudinal direction (Y direction). Four units 9 composed of the laminated rubber 3 and the leaf springs 7
The leaf springs 7, 7 are arranged so as to be in a direction substantially orthogonal to the Y direction. On the other hand, in the other vibration damping device A, the unit 9 is arranged so that the weight members 5 and 5 vibrate in the width direction (X direction).

In the building in which the two vibration damping devices A are installed as described above, when the building is vibrated by strong winds, traffic vibrations, or the like, the weight members 5, 5 become high-attenuation laminated rubber 3,
While vibrating in the horizontal direction while receiving the restoring force of the rubber members 3,..., The vibration energy is consumed by the deformation of the high-damping laminated rubbers 3, 3,. That is, the weight members 5, 5 perform the damping vibration while receiving the damping force together with the restoring force from the high damping laminated rubbers 3, 3,..., Thereby reducing the vibration of the building.

At this time, one of the two vibration damping devices A restricts the horizontal displacement of the weight members 5, 5 in only the longitudinal direction (Y direction), that is, only one direction in which the beams of the building extend.
Since the displacement in the other directions is prevented, the one-way vibration component of the building vibration is extremely effectively attenuated. Similarly, another vibration damping device A extremely effectively attenuates a vibration component of a building vibration in a direction orthogonal to the one direction.

Therefore, according to the vibration damping device A of this embodiment, not only the restoring force but also the damping force can be given to the weight members 5, 5 by the high damping laminated rubbers 3, 3,. There is no need to provide a separate damping material,
By reducing the number of parts, the cost of the apparatus can be reduced.

Moreover, while the weight members 5, 5 are allowed to change in the horizontal direction in one direction by the leaf springs 7, 7,... Therefore, the one-way vibration component of the building can be extremely effectively attenuated without increasing the frictional resistance, that is, without impairing the vibration damping action for minute vibration. Further, by using inexpensive leaf springs 7 instead of slide bearings or the like, it is possible to prevent an increase in apparatus cost and an increase in maintenance burden.

Further, in this embodiment, two vibration damping devices A are used, and two vibration damping devices A, which are orthogonal to each other,
Since the direction component is effectively attenuated,
As a result, the sway of the building can be effectively attenuated in all directions. In addition, the vibration of the weight members 5, 5 (horizontal displacement) can be achieved simply by changing the mounting angle of the unit 9 including the high-damping laminated rubber 3 and the leaf springs 7, 7 without changing the installation direction of the vibration damping device A. Since the allowable direction can be easily changed and set, the above-described effect can be obtained even when the arrangement direction of the vibration damping device A is limited, such as when the vibration damping device A is installed on a beam of a house or the like.

As described above, the vibration damping device A of this embodiment is configured to be relatively small and lightweight, and can be easily installed on a beam behind a ceiling or a roof of a building. Also,
Since it exerts a good vibration damping effect even on minute vibrations, it exerts a remarkable effect on small buildings such as detached houses. However, the invention is not limited to this, and the vibration damping device A can be used for a large-scale building such as a building.

Further, in the vibration damping device A of this embodiment, a device having four high-damping laminated rubbers 3, 3,... Has been described, but the number of the high-damping laminated rubbers 3, 3,. It goes without saying that it is not limited.

Further, the vibration damping device A of this embodiment is mounted and fixed to a building by the mounting base plates 2, 2, and the mounting base plates 2, 2 and the weight members 5, 5.
And between the side frame 4 and the high damping laminated rubber 3,3
…, But is not limited to this. For example,
It is also possible to directly fix the high-damping laminated rubbers 3, 3,... On a beam or a roof of a building.

Further, in this embodiment, the leaf springs 7, 7
Are arranged on both sides of the high-damping laminated rubber 3 as a pair, but the present invention is not limited to this, and the leaf spring 7 may be arranged separately from the high-damping laminated rubber 3. The number of leaf springs 7 may be one, or three or more. Further, by changing the number of leaf springs 7, 7,..., The natural frequency can be finely adjusted by changing the spring constant of the vibration system when the weight members 5, 5 are displaced in the horizontal direction. By doing so, the natural frequency of the vibration system can be made to substantially match the natural frequency of the building, so that the vibration damping performance can be further improved.

[0036]

As described above, according to the vibration damping device for a building according to the first aspect of the present invention, it is not necessary to separately provide a member for applying a restoring force to the weight member and a damping material. The number of points can be reduced and the cost of the device can be reduced. In addition, by controlling the displacement direction of the weight member in one direction by an inexpensive leaf spring, the one-way vibration component of the building can be extremely effectively reduced without impairing the vibration damping action against minute vibration. It can be attenuated, and the increase in apparatus cost and the increase in maintenance burden can be prevented.

According to the third aspect of the present invention, the high-attenuation laminated rubber and the leaf spring are provided as an integrated unit, so that the horizontal displacement of the weight member is allowed only by changing the mounting angle of the unit. The direction can be easily changed and set.

[Brief description of the drawings]

FIG. 1 is a front view illustrating a configuration of a vibration damping device according to an embodiment of the present invention.

FIG. 2 is a top view of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a top view showing a configuration of a unit in which a high-damping laminated rubber and a leaf spring are integrally combined.

FIG. 5 is a sectional view taken along line BB of FIG.

[Explanation of symbols]

 A Vibration control device for buildings 3 High damping laminated rubber 5 Weight member 6 Flange member 7 Leaf spring

Claims (3)

[Claims] 1. A vibration system comprising a weight member and an elastic bearing member for elastically supporting the weight member so as to be displaceable in a horizontal direction is attached to a building to reduce horizontal vibration of the building. In the vibration damping device for a building as described above, the elastic bearing member is made of a high damping laminated rubber that applies a horizontal restoring force and a damping force to the weight member, and allows the horizontal displacement of the weight member in one direction. On the other hand, a leaf spring is provided so as to restrict the other direction. 2. The leaf spring according to claim 1, wherein one end of the leaf spring is fixed to the weight member, the other end is fixed to the building, and the leaf spring is substantially perpendicular to the allowable direction of horizontal displacement of the weight member. A vibration damping device for a building, wherein the vibration damping device is arranged so as to perform a vibration. 3. The method according to claim 2, wherein flange members are provided at both ends in the laminating direction of the high attenuation laminated rubber, and both end portions of the leaf spring are fixed to the two flange members, respectively. Characteristic vibration damping device for buildings.