JP2801886B2 - Vibration damper for buildings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a building damping device for reducing floor vibration of a building.

[0002]

2. Description of the Related Art An example of a conventional vibration damping device for a floor will be described with reference to FIG. 4. Reference numeral 1 denotes a floor, on which a frame 2 is fixed.

A hinge pin 3 is provided on one side of the frame 2, and one end of an arm 4 is pivotally connected to the hinge pin 3,
The other end of the arm 4 is supported on the frame 2 by a spring 5 and an oil damper 6 is attached between the arm 4 and the frame 2. A weight 7 is supported through the middle of the arm 4, and a threaded rod 8 is fixed to one side of the weight 7 in parallel with the arm 4. The screw rod 8 passes through a rib 9 fixed to the arm 4, and a nut 10 is screwed to the screw rod 8 with the rib 9 interposed therebetween.

Further, an arm 4 is provided above and below the other end of the arm 4.
A stopper 11 for restricting the maximum displacement in the vertical direction at the other end of the frame 2 is attached to the frame 2 so that the position can be adjusted.

When the floor 1 shown in FIG. 4 vibrates due to human walking or an earthquake, the frame 2 fixed to the floor 1 also vibrates together with the floor 1, but the weight 7 is set by a spring so as to resonate with the floor. Therefore, the weight 7 and the arm 4 supporting the weight 7 are relatively displaced relative to the frame 2 with the hinge pin 3 as a pivot.

The rotation displacement of the arm 4 with respect to the frame 2 is attenuated by the oil damper 6, and the vibration of the floor 1 is reduced.

The position of the nut 10 with respect to the screw rod 8 is moved to change the position of the weight 7 on the arm 4 so that the weight 7
By adjusting the moment of inertia, the characteristic of the natural frequency can be changed.

FIG. 5 is a front view of another example of a conventionally used floor vibration isolator, and the same parts as those in FIG. 4 are denoted by the same reference numerals.

In the conventional apparatus shown in FIG. 5, a viscous tamper 12 is mounted between the arm 4 and the frame 2 without using the oil damper 6.

As shown in FIG. 6, a viscous tamper 12 is filled with a viscous body 14 in a case 13 mounted on the frame 2 and a resistance plate 15 is vertically arranged below the arm 4 so that the position can be adjusted. Attach, resistance plate 15 in viscous body 14
Is inserted.

When the floor 1 shown in FIG. 5 vibrates due to human walking, an earthquake, or the like, the weight 7 and the arm 4 supporting the weight 7 rotate relative to the frame 2 with the hinge pin 3 as a rotation fulcrum. The viscous body 14
The resistance plate 15 slides up and down.

At this time, the rotational displacement of the arm 4 with respect to the frame 2 is attenuated by the shear resistance between the viscous member 14 and the resistance plate 15, and the vibration of the floor 1 is reduced.

[0013]

The oil damper 6 shown in FIG.
Although the device for reducing the vibration of the floor 1 by the above is effective in reducing the large vibration of the floor 1 due to an earthquake or the like, in order to reduce the extremely minute vibration due to walking of a person,
There are problems that the oil damper 6 does not operate effectively due to the sealing resistance, and that a small displacement does not generate a damping force.

The apparatus for reducing the vibration of the floor 1 by the viscous tamper 12 shown in FIGS. 5 and 6 is effective in reducing extremely small vibrations caused by walking of a person or the like. In the case of a large vibration, there is a problem that a passage groove of the resistance plate 15 is formed in the viscous body 14, and the damping characteristics are not stabilized or the damping force is not generated.

The present invention has been made to solve the above problem and to provide a vibration damping device for a building capable of attenuating both a large vibration caused by an earthquake or the like and an extremely small vibration caused by a person walking or the like. It is the purpose.

[0016]

According to the present invention, a weight supported by a spring is provided above a floor, a floor beam, a ceiling beam, a roof, or the like, which is a necessary part of a vibration control device in a building. The present invention relates to a vibration damping device for a building, characterized in that a vertical relative displacement of a weight is attenuated by a viscous tamper and an oil damper. More specifically, a floor or ceiling beam, a weight supported by a spring above the floor or ceiling beam, and a floor or ceiling beam provided between the floor or ceiling beam and the weight. A viscous tamper that attenuates the vertical relative displacement with the weight by sliding friction between the viscous body and the resistance plate, and a spring and a gap having one end attached to the floor or ceiling beam and the other end having a small elastic coefficient. An oil damper facing the weight, wherein the vibration of the floor is a minute vibration in a range of a gap at the other end of the oil damper. Vibration is attenuated by the shear resistance between the viscous body and the resistance plate.If the vibration of the floor is larger than the range of the gap at the other end of the oil damper, the vibration is damped by the damping force of both the oil damper and the viscous tamper Attenuate.

[0017]

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

FIG. 2 is a front view showing an example of the embodiment of the present invention. The same parts as those in FIGS. 4 and 5 are denoted by the same reference numerals, and description thereof will be omitted.

In the present invention, a viscous tamper 12 is attached between the arm 4 and the frame 2 as in the conventional device shown in FIG. 5, but the oil damper 6 is provided as described below. Have been.

FIG. 1 is an enlarged view showing a main part of FIG. 2 partially cut away, and the lower end of the oil damper 6 is pivotally connected to the frame 2 by a pin 16 as shown in FIG. .

At the upper end of the oil damper 6, a holding member 17 having a U-shaped cross section is pivotally mounted by a pin 18, and a male screw rod 19 is vertically fixed to the upper surface of the holding member 17. The male screw rod 19 loosely penetrates a U-shaped mounting frame 20 fixed to the arm 4.

Stoppers 21 and 22 are slidably fitted to the external threaded rod 19 so as to sandwich the horizontal portion of the mounting frame 20 from above and below, and between the flanges of the stoppers 21 and 22 and the mounting frame 20. Soft springs 23 and 24 having small elastic coefficients are interposed, respectively, and urge the stoppers 21 and 22 with a small force in a direction away from the horizontal portion of the mounting frame 20.

The male screw rod 19 has nuts 25, 2 positioned above the stopper 21 and below the stopper 22.
6, the stoppers 21 and 22 are positioned, and a gap 27 of about several millimeters is formed between the lower surface of the stopper 21 and the upper surface of the horizontal portion of the mounting frame 20, so that the upper surface of the stopper 22 is attached to the upper surface of the stopper 22. A gap 28 of about several millimeters is provided between the horizontal surface of the frame 20 and the lower surface.

Thus, the upper end of the oil damper 6 is provided with the springs 23 and 24 having a small elastic coefficient, the gaps 27 and 2
8, the mounting frame 20, and the arm 4 are opposed to the weight 7, while the weight 7 is supported above the floor or ceiling beam 1 via the frame 2, the spring 5, and the arm 4, and Alternatively, the viscous tamper 12 is provided between the ceiling beam 1 and the weight 7 via the frame 2 and the arm 4.

Next, the operation of the apparatus shown in FIG. 1 will be described.

When the floor or ceiling beam 1 vibrates very minutely in the range of the gaps 27 and 28 due to walking of a person or the like, the frame 2 also vibrates minutely together with the floor or ceiling beam 1. In this case, since the rotational displacement of the arm 4 with respect to the frame 2 is within the range of the gaps 27 and 28, only the springs 23 and 24 having a small elastic coefficient bend, and the mounting frame 20 contacts the stoppers 21 and 22. do not do.

Therefore, when the floor or ceiling beam 1 vibrates very minutely, the oil damper 6 does not act at all.

The range of the minute vibration in which the oil damper 6 does not act is determined by turning the nuts 25 and 26 in FIG.
The position can be changed by changing the position of 22 and adjusting the dimensions of the gaps 27 and 28.

However, when the arm 4 makes an extremely small rotational displacement with respect to the pair with respect to the frame 2, the minute displacement of the arm 4 is transmitted to the resistance plate 15 (see FIG. 6) of the viscous tamper 12 as it is, The plate 15 slides up and down in the viscous body 14, and the rotational displacement of the arm 4 with respect to the frame 2 is attenuated by the shear resistance between the viscous body 14 and the resistance plate 15, thereby reducing the minute vibration of the floor 1. Become.

On the other hand, when the floor or ceiling beam 1 vibrates more than the range of the gaps 27 and 28 due to an earthquake or the like, the rotational displacement of the arm 4 with respect to the frame 2 also increases, and the elastic modulus of the arm 4 increases. The bending of the small springs 23 and 24 also increases, and the mounting frame 20 comes into contact with the stoppers 21 and 22.

Therefore, the displacement of the arm 4 depends on the mounting frame 20,
Stoppers 21 and 22, nuts 25 and 26, male screw rod 1
9. The vibration is transmitted to the upper end of the oil damper 6 via the holding bracket 17, the pin 18, and the vibration damping action of the oil damper 6 is performed.

At this time, the resistance plate 15 of the viscous tamper 12
(See FIG. 6) also slides up and down greatly in the viscous body 14,
The vibration damping action is performed together with the oil damper 6.

At this time, even if a passage groove for the resistance plate 15 is formed in the viscous body 14, the oil damper 6 continues the large vibration damping action. The passage grooves formed in the viscous body 14 are eliminated by appropriately sticking the viscous body 14 together.

FIG. 3 is a front view of another embodiment of the present invention. A base 29 is fixed to the floor or ceiling beam 1, and a weight 30 is provided on the base 29 with a spring 3.
1 supported. The viscous tamper 12 shown in FIG. 6 is attached between the weight 30 and the base 29.

The oil dampers 6 are arranged vertically on both sides of the weight 30, and the lower ends of the oil dampers 6
It is pivotally connected to a base 29 by a pin 16.

A male screw rod 32 is fixed to the upper end of the oil damper 6 in a vertical direction. Penetrates. The sleeves 34 and 35 and the knocks 36 and 37 are fitted to the male screw rod 32 with the spring 33 interposed therebetween. Spring 3
3 is sandwiched.

Stoppers 40 and 41 extending horizontally to the upper and lower positions of the knocks 36 and 37 are fixed to both sides of the weight 30 at positions slightly above and below the spring 33, respectively. There is a gap 42 of about several millimeters between the upper surface of the knock 36 and the upper surface of the knock 36, and a gap 43 of about several millimeters between the upper surface of the stopper 41 and the lower surface of the knock 3.

Next, the operation of the apparatus shown in FIG. 3 will be described.

When the floor or ceiling beam 1 vibrates extremely minutely within the gaps 42 and 43, the base 29 also vibrates with the floor or ceiling beam 1 minutely.

The vibration of the base 29 is transmitted to the weight 30 via the spring 31.
The vibration of 0 is attenuated by the viscous tamper 12 and reduces the minute vibration of the floor or ceiling beam 1.

At this time, the vibration of the weight 30 is caused by the gap 42,
43, only the spring 31 having a small elastic modulus bends, and the stoppers 40 and 41
As a result, the oil damper 6 does not act at all.

The range of the minute vibration in which the oil damper 6 does not act is changed by changing the sleeves 34 and 35 to those having different thicknesses.
It can be changed by adjusting the dimensions of the gaps 42 and 43.

When the floor or ceiling beam 1 vibrates more than the range of the gaps 42 and 43, the vibration of the weight 30 also becomes larger than the range of the gaps 42 and 43, and the stoppers 40 and 41 are knocked. Since the oil damper 6 comes into contact with and is pressed, the oil damper 6 also performs a vibration damping action.

As described above, also in the apparatus shown in FIG. 3, the minute vibration of the floor or ceiling beam 1 causes the viscous tamper 12 to attenuate, and the large vibration of the floor or ceiling beam 1 causes the oil damper 6 to attenuate together with the viscous tamper 12. Function.

[0045]

According to the present invention, since a single device can attenuate both small and large vibrations, the mounting space can be reduced and the price can be reduced.

[Brief description of the drawings]

FIG. 1 is an enlarged view showing a main part of FIG. 2 partially cut away.

FIG. 2 is a front view showing an example of an embodiment of the present invention.

FIG. 3 is a front view of another embodiment of the present invention.

FIG. 4 is a front view showing an example of a conventional device.

FIG. 5 is a front view showing another example of the conventional device.

FIG. 6 is a sectional view of a viscous damper.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Floor or ceiling beam 5 Spring 6 Oil damper 7 Weight 12 Viscous tamper 14 Viscous body 15 Resistance plate 23 Spring 24 Spring 27 Gap 28 Gap 30 Weight 31 Spring 33 Spring 42 Gap 43 Gap 43 Gap

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E04F 15/18 601 F16F 15/02 E04H 9/02 341

Claims (3)

(57) [Claims] A weight supported by a spring is provided above a required installation location of a vibration damping device in a building, and a relative displacement in the vertical direction between the location and the weight is attenuated by a viscous damper and an oil damper. A vibration damping device for a building, comprising: 2. A floor or ceiling beam, a weight supported by a spring above the floor or ceiling beam, and a floor or ceiling beam and a weight provided between the floor or ceiling beam and the weight. And a viscous tamper that attenuates the vertical relative displacement of the viscous body and the resistance plate by sliding friction between the viscous body and the resistance plate, and a spring and a gap having one end attached to the floor or ceiling beam and the other end having a small elastic coefficient. A vibration damping device for a building, comprising: an oil damper facing the weight. 3. The vibration damping device for a building according to claim 1, wherein the viscous damper attenuates fine vibration and the oil damper attenuates large vibration.