JP2588181Y2 - Damping damper - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration damper applied to a structure seismic isolation mechanism and a vibration damping mechanism.

[0002]

2. Description of the Related Art FIGS. 3 and 4 show a conventional viscous damper, in which a flat container b having a flat surface placed on a lower structure a has a rectangular shape.
Is filled with a viscous body c, and one resistance plate e suspended from the seismic isolated upper structure d is put into the viscous body c, and the resistance generated between the resistance plate e and the viscous body c generated at the time of the earthquake is obtained. , So that a damping effect is produced.

[0003]

The conventional viscous damper can set an effective amount of damping for a certain amplitude value, but cannot set an effective amount of damping for several amplitudes. The present invention has been proposed in view of the problems of the prior art, and an object of the present invention is to provide viscous dampers having different damping abilities at various amplitudes, large and small.

[0004]

In order to achieve the above-mentioned object, a vibration damper according to the present invention is installed on a lower structure, and a plane filled with a viscous liquid is longer than both short sides at both ends of a rectangular container. A vertical partition plate extending in the vertical direction and having a length in the longitudinal direction shorter than the entire length in the longitudinal direction of the container. A pair of rotational resistance plates that protrude and retract into a pair of partition spaces defined by the partition plates at both ends in the longitudinal direction are supported, and the upper end of each of the rotational resistance plates is attached to the lower surface of the damped upper structure. The pivot member is pivotally supported at the tip of the rotating member.

[0005]

Since the present invention is configured as described above,
When a horizontal displacement occurs between the upper structure and the lower structure at the time of an earthquake or the like, a rotating member pivotally supported at an upper end portion of the pair of rotating resistance plates causes a rotating motion in the longitudinal direction of the container. In this case, the one or more rotation resistance plates protrude and descend into the partition space defined by the partition plate in the container, and the resistance area between the rotation resistance plate and the partition plate and the viscous body is different from that of the upper structure and the lower structure. And the resistance increases.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. A is a seismic isolated upper structure, B is a lower structure, and a plane buried in the lower structure B extends in a longitudinal direction from both short sides of both ends of the rectangular container 1, and the length in the longitudinal direction is the container. The vertical partition plate 2 which is shorter than the entire length in the longitudinal direction is provided upright. A horizontal axis 3 is laid horizontally in the upper part of the center of the container 1 in a direction parallel to the short side, and a pair of fans projecting and retracting into both end partition spaces of the container 1 defined by the partition plate 2 on the horizontal axis 3. A rotation resistance plate 4 having a shape is rotatably supported on a shaft. Further, the container 1 is filled with a viscous body 5.

A vertical support piece 6 is suspended from the lower part of the upper structure A, and one end of a rotating member 7 is pivotally supported by the support piece 6, and the other end of the rotating member 7 is connected to the rotation resistance plate 4. At the upper end extending beyond the horizontal axis 3.
Since the illustrated embodiment is configured as described above, when a horizontal displacement occurs between the upper structure A and the lower structure B during an earthquake or the like, the rotating member 7 is moved as shown by a dotted line in FIG. As a result, the pair of rotation resistance plates 4 pivotally supported at the tip of the rotation member 7 also rotate as shown by the dotted line.

As described above, the horizontal movement between the upper structure A and the lower structure B is converted into a large rotational movement of the rotation resistance plate 4. Thus, when the rotation amount of the rotation resistance plate 4 is small, the resistance force exerted on the rotation resistance plate 4 by the viscous body 5 is:
When there is only a resistance between the inner wall surface of the container and the resistance is small, but the rotation amount of the resistance plate 4 is large, the resistance plate 4 is partitioned between the container 1 and the partition plate 2 to form a partition space. , The resistance surface becomes two surfaces, the resistance acting between the viscous body 5 and the rotation resistance plate 4 increases, and the resistance increases.

[0009]

As described above, according to the present invention, each of the viscous rectangular containers installed in the lower structure extends in the longitudinal direction from the short sides at both ends, and the length in the longitudinal direction is equal to the total length in the longitudinal direction of the container. A shorter vertical partition plate is erected to define a pair of partition spaces, and a pair of rotational resistances is provided on a horizontal axis extending in the upper center of the container in parallel with the short side direction so as to protrude into and out of the partition space. The plate is rotatably supported, and the upper end of the resistance plate is pivotally supported on the tip of a rotating member pivotally supported on the lower surface of the upper structure. By changing the amount of protrusion and withdrawal of the resistance plate with respect to the partition space and changing the resistance area, a single damper can exert an effective damping function for vibrations of small to large amplitudes.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a vibration damper according to the present invention.

FIG. 2 is a plan view of the container part of FIG.

FIG. 3 is a longitudinal sectional view of a conventional vibration damper.

FIG. 4 is a plan view of the container part of FIG. 3;

[Explanation of symbols]

 Reference Signs List A Upper structure B Lower structure 1 Container 2 Vertical partition plate 3 Horizontal axis 4 Rotation resistance plate 5 Viscous body 6 Vertical support piece 7 Rotating member

Claims (1)

(57) [Scope of request for utility model registration] 1. A vertical plane installed on a lower structure and filled with a viscous liquid extends in a longitudinal direction from both short sides at both ends of a rectangular container, and a length in the longitudinal direction is shorter than a total length in a longitudinal direction of the container. A partition plate is erected, and appears in a pair of partition spaces defined by the partition plates at both ends in the longitudinal direction of the container on a horizontal axis laid horizontally in the short side direction at the upper center of the container. The rotation resistance plates are pivotally supported, and the upper end of each rotation resistance plate is pivotally supported by the tip of a rotation member pivotally supported on the lower surface of the damped upper structure. Damping damper.