JP2926150B2 - Vibration energy absorbing device in vibration suppression device - Google Patents

Description

The present invention relates to a vibration energy absorbing device suitable for use in, for example, a vibration damping device for suppressing and attenuating vibration of a high-rise building.

"Conventional technology and its problems" As a vibration damping device applied to a structure such as a high-rise building, both ends of a pull member such as a wire are fixed to the structure, and an energy absorbing device is provided in the middle of the pull member. The proposed configuration has been proposed. In this method, a displacement generated when a structure vibrates is transmitted to an energy absorbing device via a tension member, and the energy absorbing device absorbs vibration energy to suppress and attenuate vibration.

By the way, as a vibration energy absorbing device in such a vibration damping device, a hydraulic damper has been generally adopted, but the hydraulic damper requires an extremely large damping force as in the case of damping a high-rise building or the like. In this case, it is not efficient, so it is usually necessary to use a large number of hydraulic dampers, which is not only disadvantageous in terms of equipment costs and maintenance, but also has a sufficient installation space including the stroke during operation. The space efficiency was not good because it was necessary to secure

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vibration energy absorbing device having excellent damping efficiency and space efficiency.

Means for Solving the Problems To achieve the above object, the invention of claim 1 is a vibration energy absorbing device for absorbing vibration energy of a structure transmitted via a wire and attenuating the vibration. And fixing one of a pair of disks arranged opposite to each other so as to be relatively rotatable with a common axis line to the structure, and preventing the wire from slipping with respect to a shaft provided on the other disk. Is wound so that the amount of displacement of the structure during vibration is converted into the amount of rotation of the other disk via the wire, and between the outer peripheral portions of the pair of disks. A damping material that is deformed by their relative rotation and absorbs vibration energy is interposed, and the diameter of the shaft around which the wire is wound is from the rotation center of the disk to the installation position of the damping material. Ratio to distance The damping material is a large number of columnar lead plugs provided at equal intervals between the outer peripheral portions of the pair of disks.

A second aspect of the present invention is a vibration energy absorbing device for absorbing vibration energy of a structure transmitted through a wire and attenuating the vibration, wherein the vibration energy absorbing device has a common axis and is rotatably opposed to each other. By fixing one of the arranged pair of discs to the structure and winding the wire around a shaft provided on the other disc in a non-slip manner, the vibration of the structure during vibration is reduced. The amount of displacement is configured to be converted to the amount of rotation of the other disk via the wire, and the outer peripheral portions of the pair of disks are deformed by their relative rotation to absorb vibration energy. The diameter of the shaft body around which the wire is wound is set to be smaller than the distance from the rotation center of the disk to the installation position of the damping material, and the damping material is Either An annular viscous fluid filled in the housing portion of which is provided on one of the discs, is characterized in that comprising occupies Bosse any of the other disc to provided the ring plate in the viscous fluid.

A third aspect of the present invention is a vibration energy absorbing device for absorbing vibration energy of a structure transmitted through a wire and attenuating the vibration, wherein the vibration energy absorbing device has a hollow rectangular box shape holding a viscous fluid. A container is fixedly provided with respect to the structure, and a plate corresponding to a lid of the container is mounted so as to be displaceable in a horizontal and horizontal direction with respect to the container, and the wire is fixed to the plate. The amount of displacement during vibration of the structure is configured to be converted into the amount of displacement of the plate body with respect to the container via a wire, and a plurality of brakes facing the displacement direction of the plate body are provided on the lower surface of the plate body. The plate is vertically provided so as to be immersed in the viscous fluid, and small holes are formed in the brake plates to allow passage of the viscous fluid.

[Operation] In the invention of claim 1, the displacement due to the vibration of the structure is transmitted to the energy absorbing device by the wire and converted by the rotational motion of the disc, and the rotational motion of the disc is changed by the deformation resistance of the damping material. It is damped, whereby the vibration energy is absorbed.

Also, since the diameter of the shaft around which the wire is wound is smaller than the distance from the center of rotation to the installation position of the damping material, the damping force of the damping material generated at the outer peripheral portion of the disk is a leverage. Amplified by the principle and transmitted to the structure, excellent attenuation efficiency is obtained.

Further, a lead plug is used as the damping material, and vibration energy is absorbed by the shear resistance of the lead plug.

In the invention of claim 2, a viscous fluid is used as the damping material, and vibration energy is absorbed by viscous resistance of the viscous fluid.

According to the third aspect of the present invention, the displacement due to the vibration of the structure is converted into a horizontal displacement of the plate body with respect to the container,
When the brake plate attached to the plate body is displaced while receiving the resistance force of the viscous fluid in the container, vibration energy is absorbed by the viscous resistance force.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Each of the devices of the embodiments described below is used as a vibration energy absorbing device in a vibration damping device for a high-rise building as schematically shown in FIG. The vibration damping device is wound around a pulley 2 in a state where the wires 1 are crossed and stretched to fix both ends of the wires 1 near the top floor of the structure 3 and to vibrate in the middle of the wires 1 in the basement. An energy absorbing device A is provided, and a displacement when the structure 3 is vibrated due to an earthquake or wind is transmitted to the energy absorbing device A via the wire 1 so that the vibration energy is transmitted by the device A. Is absorbed to suppress vibration and attenuate.

A specific embodiment of the vibration energy absorbing device A used in the above-described vibration damping device will be described below.

First, a first embodiment is shown in FIGS. Device A ₁ of the first embodiment, the circular plates 10 and 11 of the pair are combined relatively rotatably to their axes as a common, and, as a damping material between the outer periphery mutual both discs 10 and 11 A plurality of lead plugs 12 are attached at equal intervals.

Device A ₁ of the above structure, the circular plate 11 of the lower side is fixed to the structure 3, with the wire 1 to the shaft 13 of the upper disc 10 is wound so as not to slip using is intended to be, thereby, in the device a _1, the wire 1 with the displacement of the structure 3 is pulled in one direction, that the upper side of the disc 10 is rotated relative to the disc 11 of the lower Become
As a result, as shown in FIG. 4, shear deformation occurs in the lead plugs 12, and the hysteresis energy of the lead plugs 12 causes the vibration energy of the structure 3 to be absorbed.

Then, in the device A _1, the axis of the upper disc 10
Since it is turning slip incapable winding wire 1 against 13, which is transmitted is amplified to the structure 3 by the principle of the damping force Fd Gateko of the device A _1, as a result, a damping material There is an advantage that the use amount of the lead plug 12 can be saved.

Referring to Figure 5 for that matter, the above apparatus A ₁ is the central axis of the circular plates 10 and 11 becomes the leverage points in operation, the center of the mounting position of the lead plug 12 damping force Fd The point of action where the damping force Fd is transmitted to the wire 1 is the winding position of the wire 1,
Therefore, assuming that the distance Rd from the fulcrum to the force point and the distance Rw from the fulcrum to the point of action, the force Fw transmitted to the wire 1 is
The relationship between Fw / Fd = Rd / Rw Fw = Fd (Rd / Rw) = aFd (a is the arm ratio, a = Rd / Rw) is obtained between the leverage and the damping force Fd. That is, from this device A ₁ to wire 1
Force Fw to be transmitted to the structure 3 via a becomes to have been amplified in a multiple of the actual damping force Fd of the device A _1, for example, damping force in the case of arm ratio a = 2 has 2 It will be amplified twice.

In this case, the displacement amount δd at the point of force is given by the principle of leverage.
Is a times the displacement δw at the point of action. That is, there is a relation of δd / δw = Rd / Rw = a. Therefore, the damping coefficient of the apparent the apparatus A ₁ is Ce becomes a ² times the actual damping coefficient C as shown in the following equation.

^{Ce = Fw / δw = a 2} Fd / δd = a 2 C Then, since the energy absorption capability of such a device is proportional to the amount of damping material or lead plug 12, the arm ratio In the above apparatus A ₁ a Therefore, the amount of use of the lead plug 12 can be saved in inverse proportion to the square of, so that the cost of the device and the size of the device can be sufficiently reduced.

As will be apparent from the above description, the amplification of the damping force based on the principle of leverage becomes more remarkable as the arm ratio a is increased, that is, as the Rd size is larger and the Rw size is smaller, If it is too large, the entire device becomes large, so it is necessary to set it in consideration of the installation space. Also, if the Rw dimension is too small, the shaft
For example, it is difficult to prevent the wire 1 from being wound around and prevent slipping. Therefore, for example, a gear (sprocket) is attached to the shaft 13 and a chain is attached in the middle of the wire 1 so that the gears and the chain are meshed. May be.

Also, the device A _1, since performs a absorption of energy by utilizing the rotational movement of the disc 10, only the disc 10 is rotated at the time of operation, Thus, conventionally hydraulic damper It is not necessary to secure a space for the stroke during operation as in the case of using the device.Therefore, it is possible to improve the space efficiency in this respect, in combination with the fact that the device itself can be downsized. You can do it. This is, considering that the displacement amount δd in Hate force point by this principle in the above apparatus A ₁ is increased, an extremely advantageous as compared with the case of using a conventional hydraulic damper or the like.

The vibration energy absorbing device A1 of the _first embodiment has been described above. Next, the second embodiment will be described with reference to FIGS. 6 and 7. The device A ₂ of the second embodiment includes a first
Instead of the lead plug 12 in the embodiment, the viscous resistance of a viscous fluid (for example, a butane-based polymer material or the like) is used as the damping force. That is, in the device A ₂ of the second embodiment, two ring plates 20 and 21 are mounted on the upper surface of the outer peripheral portion of the lower disk 11 fixed to the structure 3 at intervals. A ring plate 23 is attached to the lower surface of the upper circular plate 10 so as to hold the viscous fluid 22 in the annular storage portion formed by the ring plates 20 and 21. The lower portion of the plate 23 is immersed in the viscous fluid 22 in the storage section.

In this apparatus A ₂ of the second embodiment, as in the device A ₁ of the first embodiment, the circle when the wire 1 is pulled to one the upper disc 10 of the lower side with the displacement of the structure 3 Rotation with respect to the plate 11 causes a shearing resistance to be generated in the viscous fluid 22 at that time, and vibration energy is absorbed by the shearing resistance. Also in the second embodiment, the damping force, that is, the shear resistance of the viscous fluid 22 is amplified by the leverage principle and transmitted to the structure 3 as in the first embodiment.

Note that the magnitude of the damping force can be appropriately set by adjusting the degree and amount of the viscosity of the viscous fluid 22, the size of the gap between the ring plates 20, 23, and the like. Also, the device A ₂ of the second embodiment, the operating stroke is unlimited theoretically.

Next, a third embodiment will be described with reference to FIGS. The device A ₃ of the third embodiment is configured such that a disk 31 serving as a lid of the container 30 is rotatable relative to a cylindrical container 30 containing the same viscous fluid 22 as in the second embodiment. A plurality of (four in the illustrated example) ring plates 32 and 33 attached to both the bottom surface of the container 30 and the lower surface of the disk 31 are alternately and relatively spaced at predetermined intervals. It is configured to be rotatably fitted. That is, this third
In the device A ₃ embodiment, the disc 31 is equivalent to the disc 10 in the first embodiment and the second embodiment, and a circular bottom surface 30a of the container 30 in the first embodiment and the second embodiment plate 11 And a viscous fluid 22 as a damping material is interposed between them.

Also in the third embodiment, the wire 31 wound non-slip with respect to the shaft 34 of the disc 31 is pulled in accordance with the displacement of the structure 3 so that the disc 31 rotates with respect to the container 30. However, the vibration energy is absorbed by the shear resistance of the viscous fluid 22 generated at that time. Also in this case, the damping force is amplified by the principle of leverage as in the first and second embodiments, and the damping force is adjusted by adjusting the number of ring plates 32 and 33 and their mutual interval. The ability to adjust the force is the same as in the second embodiment.

In order to relatively rotate the disk 31 with respect to the container 30, the shaft 34 is formed as a hollow shaft as shown in FIG. It is preferable to insert the bearing 36 between the upper ends so as to be inserted therebetween. Further, as shown in FIG.
Preferably, a seal member 37 for preventing leakage of the viscous fluid 22 is interposed between the outer peripheral edge of the container 30 and the container 30.

Further, a fourth embodiment will be described with reference to FIGS. 11 to 14.

Device A ₄ of the fourth embodiment, the corner box-shaped container 40 carrying the viscous fluid 22, rectangular plate member corresponding to the lid of the container 40
41 is mounted so that it can be displaced horizontally and horizontally, and its plate 41
When the wire 1 is pulled by the vibration of the structure 3, the plate 41 is displaced in the lateral direction with respect to the container 40. Multiple sheets (5 sheets in the example shown) on the lower surface of the plate body 41
Are mounted so that they are oriented in the direction of displacement of the plate 41, and when the plate 41 is mounted on the container 40, the brake plates 42 are immersed in the viscous fluid 22 in the container 40. Has been. A plurality of small holes 43 are formed in the braking plates 42 as shown in FIG. The formation positions of these small holes 43 are randomly set, and the adjacent brake plates
The small holes 43 formed in 42 are not arranged in a straight line. Thereby, the frictional resistance when the viscous fluid 22 passes through the small holes 43 is sufficiently increased.

In FIGS. 11 to 14, reference numeral 44 denotes a plate
An angle-shaped fixing member to be attached so as to be displaceable only in the movement direction with respect to 40, 45 is a bearing for displacing the plate 41, 46 is a sealing material interposed between the plate 41 and the container 40 And 47, an injection pipe for the viscous fluid 22; and 48, an exhaust pipe for the viscous fluid 22.

In the device A ₄ of the fourth embodiment, when the wire 1 is pulled with the vibration of the structure 3, the plate 41 is displaced with respect to the container 40, and the braking plate 42 is moved together with the plate 41 in the viscous fluid 22. Although displaced in the lateral direction, the viscous fluid 22 generates a flow and flows between the respective brake plates 42, and further passes through small holes 43 formed in the brake plates 42. And the viscous fluid 22
Vibration energy is absorbed by viscous resistance generated when the fluid flows between the brake plates 42, frictional resistance generated when passing through the small holes 43, and eddy resistance.

In the device A ₄ of the fourth embodiment, a plurality of brake plates 42
Since a damping force is exerted by each of the above, a significantly larger damping force can be obtained as compared with a conventional hydraulic damper or the like, and the space efficiency is excellent. And, as the container 40, it is possible to use a concrete structure which makes effective use of a building body of a building, for example, a dead space under the floor of the lowest floor, etc., so that the cost is low and the construction is easy. It is particularly suitable for use as an energy absorbing device in a vibration damping device for buildings such as high-rise buildings.

In the device A ₄ of the fourth embodiment, not only the viscosity and the amount of the viscous fluid 22 in the container 40, the number and area of the braking plate 42, the number and size of the small hole 43, or the like as appropriate Needless to say, the damping force can be freely set by setting.

[Effect of the Invention] As described in detail above, the invention of claim 1 converts the displacement due to the vibration of the structure by the rotational motion of the disk by the wire, and the rotational motion of the disk is damped by the damping material. In this case, the disk is rotated only at the time of operation, so that a space for the stroke at the time of operation is secured as in the case of using a conventional hydraulic damper. Therefore, there is an advantage that space efficiency can be improved.

Also, by making the diameter of the shaft around which the wire is wound smaller than the distance from the center of rotation to the installation position of the damping material, the damping force is amplified by the principle of leverage and transmitted to the structure. This has the effect of obtaining excellent attenuation efficiency.

Further, since the lead plug is used as the damping material, the vibration energy of the structure is efficiently absorbed by the hysteresis energy of the lead plug.

Further, since the invention of claim 2 uses a viscous fluid as the damping material, there is an advantage that the stroke during operation can be theoretically unlimited.

The invention according to claim 3 converts the displacement due to the vibration of the structure into the displacement of the plate with respect to the container, so that the brake plate attached to the plate is displaced while receiving the resistance force of the viscous fluid in the container. The vibration energy is absorbed by the viscous resistance force of the viscous fluid, and the damping force is exerted by each of the plurality of brake plates, so that the damping force is significantly larger than that of the conventional hydraulic damper. It has the effect of being able to obtain and being excellent in space efficiency,
In addition, since the container can be made of a concrete structure in which the frame of the building is effectively used, the container is particularly suitable for use as an energy absorbing device in a vibration damping device for a building such as a high-rise building.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of a vibration damping device to which the device of the present invention is applied. 2 to 5 show a first embodiment of the present invention. FIG. 2 is a plan view, FIG. 3 is a side sectional view, FIG. 4 is an enlarged view of a main part, and FIG. FIG. 3 is an explanatory diagram for explaining the method. 6 and 7 show a second embodiment of the present invention. FIG. 6 is a plan view and FIG. 7 is a side sectional view. 8 to 10 show a third embodiment of the present invention. FIG. 8 is a side sectional view, and FIGS. 9 and 10 are enlarged sectional views of a main part, respectively. 11 to 14 show a fourth embodiment of the present invention. FIG. 11 is an exploded perspective view showing an assembled state, FIG. 12 is a side view, FIG. 13 is a cross sectional view, and FIG. Is an enlarged view of a main part. A, A _{1 to} A ₄ …… Vibration energy absorber, 1 …… Wire, 3 …… Structure, 10,11… Disc, 12 …… Lead plug (damping material), 13 …… Shaft, 22 …… Viscous fluid (damping material), 23… Ring plate, 30a …… Bottom container (disc), 31… Disc, 33… Ring plate, 34… Shaft, 40… Container, 41… … Plate, 42 …… brake plate, 43 …… small hole.

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Toru Ishii 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Satoshi Kiyokawa 2-161 Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (72) Inventor Hiroshi Kawase, 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Corporation (72) Inventor Toshiaki Sato, 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Corporation ( 72) Inventor ▲ Taka ▼ Ikuo Hashi 2-16-1 Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. (56) References JP-A-61-49076 (JP, A) JP-A-49-71746 (JP, A) JP-A-62-197574 (JP, A) JP-A-62-148776 (JP, A) JP-A-59-205035 (JP, A) Japanese Utility Model sho 59-205035 (JP, U) (58) Survey Field (Int.Cl. ⁶ , DB name) E04H 9/02 -9/02 301

Claims (3)

(57) [Claims] 1. A vibration energy absorbing device for absorbing vibration energy of a structure transmitted through a wire and attenuating the vibration, comprising: By fixing one of the discs to the structure and winding the wire around a shaft provided on the other disc in a non-slip manner, the displacement of the structure during vibration can be reduced by the wire. And a damping material interposed between the outer peripheral portions of the pair of discs to absorb vibration energy by being deformed by their relative rotation between the outer peripheral portions of the pair of discs The diameter of the shaft around which the wire is wound is set to be smaller than the distance from the center of rotation of the disc to the installation position of the damping material, and the damping material is the pair of discs Peripheral phase of A vibration energy absorbing device in a vibration damping device, comprising a large number of cylindrical lead plugs provided at equal intervals between each other. 2. A vibration energy absorbing device for absorbing vibration energy of a structure transmitted through a wire and attenuating the vibration, comprising: By fixing one of the discs to the structure and winding the wire around a shaft provided on the other disc in a non-slip manner, the displacement of the structure during vibration can be reduced by the wire. And a damping material interposed between the outer peripheral portions of the pair of discs to absorb vibration energy by being deformed by their relative rotation between the outer peripheral portions of the pair of discs The diameter of the shaft around which the wire is wound is set to be smaller than the distance from the rotation center of the disk to the installation position of the damping material, and the damping material is one of the circles. Set on a board A vibrating energy absorbing device in a vibration damping device, characterized in that a viscous fluid filled in a ring-shaped receiving portion is formed by immersing a ring plate provided on one of the other disks in the viscous fluid. 3. A vibration energy absorbing device for absorbing vibration energy of a structure transmitted through a wire and attenuating the vibration, wherein said hollow rectangular box-shaped container holding a viscous fluid is provided in said structure. In addition to providing a plate fixedly to an object, and mounting a plate corresponding to the lid of the container so as to be displaceable in a horizontal and horizontal direction with respect to the container and fixing the wire to the plate, vibration of the structure is achieved. The amount of displacement at the time is converted into the amount of displacement of the plate with respect to the container via a wire, and a plurality of brake plates facing the displacement direction of the plate are provided on the lower surface of the plate with the viscous fluid. It is suspended so that it sinks inside,
In addition, a small hole is formed in each of the brake plates to allow the passage of a viscous fluid.