JP3075550B2 - Lever mechanism and structure for vibration damping device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lever mechanism and a structure for a vibration damping device capable of damping a vibration of a structure due to an earthquake, wind pressure or the like.

[0002]

2. Description of the Related Art In the field of structural design, a vibration damping device for damping the vibration itself of a structure has been developed for a seismic structure capable of withstanding the impact force of an earthquake or the like by strengthening columns and beams of the structure. Proposed.

[0003] In this vibration damping device, a weight is usually rotatably attached to the tip of a differential lever provided on an arbitrary floor of a structure to amplify the motion of the weight caused by shaking due to an earthquake or the like by leverage ratio. Generates inertial force. With this inertial force,
It offsets the relative deformation of the structure in the horizontal direction caused by shaking such as an earthquake, and dampens the shaking of the structure.

[0004]

However, in the conventional vibration damping device, since the differential lever is generally constituted by an arm, a pantograph or the like for preventing the circular motion of the weight attached to the tip of the differential lever is generally used. It had to be installed to prevent vertical movement of the weight. For this reason, the conventional vibration damping device has a disadvantage that the mechanism is complicated and the installation space is large.

An object of the present invention is to provide a lever mechanism for a vibration damping device which can suppress the swinging of a structure in an arbitrary direction with a simple mechanism in consideration of the above fact.

[0006]

According to a first aspect of the present invention, there is provided a lever mechanism for a vibration damping device, wherein a pair of first links rotatably connected to the first vibrator at the same position at one end, and a pair of first links at one end. A pair of second links rotatably connected to the auxiliary mass at the same position and each of the other ends rotatably connected to each of the other ends of the first links, and one end of the second link. L vs. M (L
> M), and are rotatably connected to points near the first link side connection point, respectively, and the other end is rotatably connected to the second vibrator at the same position. And at least a pair of link devices having a pair of third links.

According to a second aspect of the present invention, there is provided a vibration control device lever mechanism,
A first link having one end rotatably connected to the first vibrator, one end rotatably connected to the first vibrator, and the other end rotatably connected to the other end of the first link; Concatenated,
A second link rotatably connected to the auxiliary mass at the same position as the connection point;
A third link rotatably connected to a point internally divided into (L> M) and a point close to the first vibrating body-side connection point, and one end connecting the second link with L to M (L> M). M)
And while being rotatably connected to a point near the auxiliary mass side connection point, the other end is rotatably connected to the second vibrator,
And at least one pair of link devices having a fourth link rotatably connected to the other end of the third link at the same position as the connection point.

According to a third aspect of the present invention, a lever mechanism for a vibration damping device according to the first or second aspect is interposed at a joint between a column and a beam.

[0009]

According to the lever mechanism for a vibration damping device of the present invention, when a vibration force acts due to an earthquake or the like, the auxiliary mass moves in a direction in which the vibration force acts. At this time, the vibration force transmitted from the first vibrating body is amplified from the leverage ratio of the lengths L and M on the second link and transmitted to the auxiliary mass as a differential leverage force. Therefore, the displacement amount of the first and second vibrators is
The movement as a pendulum of the auxiliary mass, which is amplified by the differential lever force to the auxiliary mass and transmitted as a large displacement amount and is synchronized with the movement of the first and second vibrating bodies, is converted into the first mass as the additional mass.
And the apparent mass is increased due to the addition to the second vibrator.

Thus, the natural periods of the first and second vibrators are extended, and the effect of reducing the vibration input is produced.
In addition, the response of the second vibrator during vibration can be reduced.

Further, the lever mechanism for a vibration damping device according to the first aspect has only the first to third links and the auxiliary mass, and the first and second vibrating bodies are formed by a simple mechanism. Can be suppressed. Similarly, the lever mechanism for a vibration damping device according to claim 2 has only the first to fourth links and the auxiliary mass, and can be damped by a simple mechanism.

Further, according to the structure described in claim 3, the vibration force transmitted from the column to the beam is attenuated, and the vibration force acting on the structure is reduced. Thus, the vibration of the structure is suppressed.

[0013]

1 to 3 show a vibration damping device 10 to which a lever mechanism for a vibration damping device according to a first embodiment is applied.

As shown in FIGS. 1 and 2, the vibration damping device 10 is installed in a storage space 12 provided on an arbitrary floor of a structure. The accommodation space 12 is formed between a ceiling 14 and a floor 16. Prop columns 18 are erected from the four corners of the ceiling portion 14 and support the floor portion 16 at predetermined intervals. The column 18 has a very high rigidity in the vertical direction as compared with a rigidity in the horizontal direction.
A columnar connecting member 20 is erected from the ceiling 14 in the vicinity of the column 18.

As shown in FIGS. 1 and 3, a pair of links 22 are rotatably connected to the connecting member 20 (this connecting point is indicated by point A in FIG. 3). .
One end of a link 24 is connected to the other end of the link 22. The link 24 is composed of two superposed plates spaced at a predetermined interval. The other end of the link 24 is rotatably connected to the other end of the other link 24, and is rotatably connected to the connecting member 25 at the same position (this connection point is indicated by a point B in FIG. 3). ing.).
This connecting member 25 is formed in a columnar shape,
6 fixed. This auxiliary mass body 26 is attached to the ceiling 1
4 are mounted on a large number of spherical rollers 28 arranged on the central portion of the roller 4, and are slidable on the rollers 28.

At a point where the link 24 is internally divided into L to M (L> M) and at a position close to the link 22 side connection point,
One end of the link 30 is rotatably connected. The other ends of the link 30 are connected to each other, and the connecting member 3 is connected at the same position.
2 (the point of connection is indicated by point C in FIG. 3). The connecting member 32 is fixed to the floor 16 (see FIG. 2). Here, the connection points A, B, and C are located on a straight line (shown by a chain line in FIG. 3).

As described above, the link device is constituted by the links 22, 24 and 30. In this embodiment, as shown in FIG. 1, the link device having the same structure is symmetrical with respect to the auxiliary mass body 26. Are arranged.

Next, the operation of the first embodiment will be described. FIG.
As shown in (A), when vibration occurs due to an earthquake or the like, a vibration force is applied to the vibration damping device 10 including the link device constituted by the links 22, 24, and 30 from an arbitrary direction (the direction of the arrow P). Works. Therefore, as shown in FIG. 4B, the connection points A, B, and C of the link device also move in the direction of arrow P, and each link device is deformed into a parallelogram in plan view. Accordingly, the auxiliary mass body 26 also moves in the arrow P direction.

At this time, the vibration force transmitted from the ceiling 14 is amplified and transmitted to the auxiliary mass body 26 as a differential lever force from the leverage ratio of the lengths L and M on the link 24. Therefore, the displacement amount of the ceiling portion 14 generated in the direction of the arrow P is amplified by the differential lever force to the auxiliary mass body 26 and transmitted as a large displacement amount, and is used as a pendulum of the auxiliary mass body 26 synchronized with the movement of the structure. Motion adds to the structure as additional mass, increasing the apparent mass, consequently extending the natural period of the structure, reducing the effect of earthquake input, and reducing the seismic response of the structure. .

As described above, the vibration damping device 10 includes only four sets of link devices having a lever mechanism and one auxiliary mass body 26, and transmits the structure to the structure from any direction by a simple mechanism. Can be suppressed. In addition,
In this embodiment, four sets of link devices are used, but it is sufficient to use at least one pair of link devices.

The upper and lower parts of the structure and the auxiliary mass 2
6 is provided with a sensor for detecting the amount of displacement, and the link 2 is driven by the driving means in accordance with the amount of displacement of the upper and lower parts of the structure.
An active vibration damping mechanism can be configured by operating the auxiliary mass body 26 by directly operating the auxiliary mass body 26 while controlling the displacement amount of the auxiliary mass body 26.

Next, a second embodiment according to the present invention will be described.
FIG. 5 is a side view illustrating a state where the vibration damping device 50 according to the second embodiment is used for the joint portion 56 of the column 52 and the beam 54. The vibration damping device 50 is installed on both upper and lower surfaces of the joint portion 56 and has the same configuration as the vibration damping device 10 according to the first embodiment. In addition, the vibration damping device 50 according to the second embodiment is also installed at the joint opposite to the beam 54.

According to the vibration damping device 50 according to the second embodiment, the vibration force transmitted from the column 52 to the beam 54 is attenuated.
The vibration force acting on the entire building is reduced. Thereby, the shaking of the whole building can be controlled.

Next, a third embodiment according to the present invention will be described.
FIG. 6 shows a vibration damping device 60 according to the third embodiment in plan view. The vibration damping device 60 has a link 64 whose one end is rotatably connected to a connecting member 62 (this connecting point is indicated by a point E in FIG. 6). The other end of the link 64 is rotatably connected to one end of a link 66, and is rotatably connected to a connecting member 68 at the same position. The connecting member 68 is formed in a columnar shape, and is fixed to the auxiliary mass body 70. The other end of the link 66 is rotatably connected to the connecting member 62. This connecting member 62
Is fixed to the ceiling of a structure (not shown).

On the other hand, one end of the link 72 is rotatably connected to a point which internally divides the link 64 into L to M (L> M) and a point close to the connection point (point E) on the connection member 62 side. ing. Also, at a point that internally divides the link 66 into L to M (L> M) and at a point close to the connection point (point F) on the connection member 68 side,
One end of the link 74 is rotatably connected. The link 72 and the link 74 are rotatably connected to each other, and are rotatably connected to the connecting member 76 at the same position. The connecting member 76 is fixed to the floor of a structure (not shown). As described above, the vibration damping device 60 according to the third embodiment includes the link 6
4, 66, 72, and 74 constitute a link device. In the present embodiment, four link devices having the same configuration are arranged symmetrically about the auxiliary mass body 70.

According to the vibration damping device 60 of the third embodiment, when a vibration occurs due to an earthquake or the like, a vibration force acts from an arbitrary direction. At this time, the transmitted vibration force is amplified from the leverage ratio between the lengths L and M on the links 64 and 66 and is transmitted to the auxiliary mass 70 as a differential leverage. Therefore, the displacement of the ceiling portion of the structure is amplified by the differential lever force to the auxiliary mass 70 and transmitted as a large displacement, and the movement of the auxiliary mass 70 as a pendulum synchronized with the movement of the structure is added. Since the mass is added to the structure as a mass, the apparent mass is increased, and as a result, the natural period of the structure is extended, and the effect of reducing the earthquake input is produced, so that the response of the structure during an earthquake can be reduced. The other configuration, operation and effect are the same as those of the first embodiment.

[0027]

As described above, the lever mechanism and the structure for the vibration damping device according to the present invention have a structure including at least one pair of link devices having a plurality of links and one auxiliary mass. With a simple mechanism, it is possible to suppress the sway of the structure in any direction.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a vibration damping device according to a first embodiment.

FIG. 2 is a side view showing a state where the vibration damping device according to the first embodiment is installed in an accommodation space provided on an arbitrary floor of a structure.

FIG. 3 is a plan view showing one set of link devices among the vibration damping devices according to the first embodiment.

FIG. 4A is a plan view showing the vibration damping device according to the first embodiment. (B) is a plan view showing a state in which a vibration force acts on the vibration damping device according to the first embodiment from an arbitrary direction (the direction of arrow P).

FIG. 5 is a side view showing a vibration damping device according to a second embodiment.

FIG. 6 is a plan view showing a vibration damping device according to a third embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Vibration suppression device 14 Ceiling part (1st vibrating body) 16 Floor part (2nd vibrating body) 22 (1st) link 24 (2nd) link 26 Auxiliary mass body (auxiliary mass) 30 (3rd) ) Link 50 damping device 52 column 54 beam 56 joint (joint) 60 damping device 64 (first) link 66 (second) link 70 auxiliary mass body (auxiliary mass) 72 (third) Link 74 (fourth) link

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Tatsuharu Ishimaru 4-11-17 Hanaguri, Soka City, Saitama Prefecture (72) Inventor Takahiro Shintani 5-16-16, Maehara Higashi, Funabashi City, Chiba Prefecture (72) Inventor Yamaguchi Nobuo 8-21-1, Ginza, Chuo-ku, Tokyo Inside Takenaka Corporation Tokyo Main Store (72) Inventor Toshihiro Hayashida 1-16-14 Shibuya, Shibuya-ku, Tokyo Shibuya Subway Building Tokyu Construction Co., Ltd. (56) Reference Document JP-A-5-321978 (JP, A) JP-A-6-235270 (JP, A) JP-A-3-163240 (JP, A) JP-A-2-3004777 (JP, A) JP-A-63-1988 135628 (JP, A) JP-A-56-139366 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16F 15/02 E04H 9/02 341

Claims (3)

(57) [Claims] A pair of first links having one ends rotatably connected to the first vibrating body at the same position; and one ends rotatably connected to the auxiliary mass at the same position, and each of the other ends. And a pair of second links rotatably connected to each of the other ends of the first links, and a point where one end internally divides the second links into L pairs M (L>M); A pair of third links each rotatably connected to a point near the one link-side connection point, and the other end rotatably connected to the second vibrator at the same position. Lever mechanism for vibration damping device with link device. 2. A first link having one end rotatably connected to the first vibrator, one end rotatably connected to the first vibrator, and the other end being other than the first link. Rotatably connected to the end, and
A second link rotatably connected to the auxiliary mass at the same position as the connection point; and a point at which one end internally divides the first link into L to M (L> M), and a first vibration. A third link rotatably connected to a point near the body-side connection point, and a point at which one end internally divides the second link into L to M (L> M), and is close to the auxiliary mass-side connection point A fourth link rotatably connected to the point, the other end rotatably connected to the second vibrator, and the other link rotatably connected to the other end of the third link at the same position as the connection point. A lever mechanism for a vibration damping device, comprising: at least one pair of link devices; 3. The joint between a column and a beam as claimed in claim 1 or 2.
The structure which interposed the lever mechanism for vibration damping devices of any one of 3.