JP4067339B2 - Multi-function damping device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
This invention is installed in the seismic isolation layer of the seismic isolation structure, functions as a damping device during an earthquake or strong wind, or has a lock function to prevent deformation of the seismic isolation layer at an arbitrary position, and further after the earthquake or strong wind It belongs to the technical field of multifunctional damping devices that also have a restoring function to return the residual deformation of the seismic isolation layer to the origin later.
[0002]
[Prior art]
Conventionally, it has been generally performed to install a damping device in the seismic isolation layer of the seismic isolation structure, to provide damping to the response of the structure to external forces during earthquakes or strong winds, and to reduce vibration and deformation (For example, refer to the high attenuation device of Japanese Patent No. 2528563).
[0003]
In addition, if a residual deformation occurs in the seismic isolation layer of the seismic isolation structure after an earthquake or strong wind, a separate jack should be installed and restored by applying a forced deformation as a means to restore it to the origin. Has also been done.
[0004]
Conventionally, there is no specially equipped lock function that forcibly prevents deformation of the seismic isolation layer. For this reason, there is a concern that the seismic isolation layer vibrates each time in response to swarms of weak earthquakes and strong winds, resulting in a loss of habitability, or the seismic isolation device undergoes many repeated deformations to cause fatigue and damage. It was.
[0005]
In any case, it has traditionally worked as an attenuation device in the event of an earthquake, etc., and has a lock function that prevents deformation of the base isolation layer as needed, or a restoration function that returns residual deformation of the base isolation layer to the origin after the earthquake. There is no functional device, and each device is merely installed according to function.
[0006]
[Problems to be solved by the present invention]
According to the current state of the art as described above, a plurality of jacks are arranged in order to return the residual deformation generated in the seismic isolation layer of the seismic isolation structure to the origin after the earthquake or strong wind. In addition, a great deal of effort was required because a jack was placed each time residual deformation occurred.
[0007]
Conventionally, since there is no lock function to forcibly prevent the deformation of the seismic isolation layer, there is no special countermeasure against swarming weak earthquakes and strong winds, just adjusting the performance of the damping device at best. It was equal.
[0008]
Accordingly, the object of the present invention is not only a function as a damping device as described above, but also a lock function that prevents deformation of the seismic isolation layer as needed, and further, a seismic isolation after an earthquake. Another object of the present invention is to provide a multi-function damping device that has a restoring function for returning the residual deformation of the layer to the origin, and can use each function properly whenever necessary.
[0009]
[Means for Solving the Problems]
As a means for solving the above-mentioned problem, a multi-function attenuation device according to the invention described in claim 1 is:
A multi-function type damping device that is installed in the seismic isolation layer of the seismic isolation structure and functions as a damping function, a return to origin function, or a lock function,
The hydraulic cylinder 1 , the piston 2 incorporated therein, and the piston rod 10 constitute a main body, and the hydraulic cylinder 1 includes a hydraulic control circuit 3. The hydraulic cylinder 1 constitutes a seismic isolation layer. Connected to a structure, and the piston rod 10 is installed in connection with the other structure;
The piston 2 includes an oil passage 6 for communicating the oil chambers 4 and 5 before and after the piston 2 , and an opening / closing valve 7 for opening and closing the passage is installed in the oil passage 6, and means 8 for controlling the opening / closing of the opening / closing valve 7. Is provided,
Main oil passages 11A and 11B for supplying or removing hydraulic pressure from a hydraulic pump 9 are connected to oil chambers 4 and 5 before and after the piston 2 in the hydraulic cylinder 1 , and the main oil passages 11A and 11B are mainly opened and closed. A valve 12 is provided, and means 13 for controlling the opening and closing of the main on-off valve 12 is provided,
A bypass 30 is provided to bypass the main on-off valve 12 of the main oil passages 11A and 11B and short-circuit the oil chambers 4 and 5 before and after the piston 2 in the hydraulic cylinder 1, and the bypass 30 is opposite to the relief valve 16. A safety circuit for limiting the displacement of the piston 2 according to the set value of the relief valve 16 in combination with a stop valve;
The hydraulic control circuit 3, the on-off valve 7 oil passage 6 of the piston 2 is fully opened, the main oil passage 11A, the main on-off valve 12 and 11B fully closed and the attenuation function state, or of the piston 2 of the oil passage 6 the on-off valve 7 is fully closed, and the main oil passage 11A, the main on-off valve 12 the homing functions fully opened state of 11B, or the opening and closing valve 7 oil passage 6 of the piston 2 is fully closed, the main oil passage 11A, 11B of the main on-off valve 12 is also characterized in that it is switched to the configuration work in the state of the lock function is fully closed.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The multi-function damping device according to the first aspect of the present invention is installed in the seismic isolation layer of the seismic isolation structure as shown in FIGS. Function, origin return function and lock function are used to work respectively.
[0012]
This multifunctional damping device has a hydraulic cylinder 1 and a piston 2 built in the hydraulic cylinder 1 and a hydraulic control circuit 3. In the figure, reference numeral 10 denotes a piston rod. However, FIGS. 1 to 3 show only the outline of the hydraulic control circuit 3. In this multi-function damping device, the hydraulic cylinder 1 is connected to one of the vibrating bodies (such as a base isolation structure) constituting the base isolation layer, and the piston rod 10 is connected to the other base, for example, and installed. .
[0013]
The piston 2 includes an oil passage 6 for communicating the front and rear oil chambers 4 and 5 as shown in a detailed embodiment of the hydraulic control circuit 3 in FIG. 4, and opens and closes the oil passage 6 in the oil passage. An opening / closing valve 7 is installed, and further, means 8 for controlling opening / closing of the opening / closing valve 7 is provided. The on-off valve 7 is an electromagnetic valve (automatic valve) as an example, and the means 8 is an electric control circuit thereof.
[0014]
Main oil passages 11A and 11B for supplying or removing hydraulic pressure from the hydraulic pump 9 are connected to oil chambers 4 and 5 before and after the piston 2 in the hydraulic cylinder 1. A main opening / closing valve 12 is installed in each of the main oil passages 11A, 11B, and means 13 for controlling the opening / closing of the main opening / closing valve 12 is provided. The main on-off valve 12 is a manual valve or an electromagnetic valve (automatic valve), and the means 8 is an operation handle or an electric control circuit.
[0015]
The hydraulic control circuit 3 in FIG.
(1) An implementation state of a damping function (damper) in which the on-off valve of the oil passage 6 of the piston 2 is fully opened and the main on-off valve 12 of each of the main oil passages 11A, 11B is fully closed as shown in FIG.
(2) Implementation state of an origin return function (jack) in which the on-off valve of the oil passage 6 of the piston 2 is fully closed and the main on-off valve 12 of the main oil passages 11A, 11B is fully opened as shown in FIG.
(3) An implementation state of the lock function in which the on-off valve of the oil passage 6 of the piston 2 is fully closed and the main on-off valve 12 of the main oil passages 11A, 11B is also fully closed as shown in FIG.
Each of them is configured to work.
[0016]
During the damper function (1) above, the damping action based on the diameter of the oil passage 6 provides a damping action equivalent to the oil flow resistance, increasing the damping force of the base isolation layer during an earthquake or strong wind, Reduce the response of the structure.
During the jack function (2), the driving force required by the product of the magnitude of the hydraulic pressure supplied to the front and rear oil chambers 4 and 5 and the magnitude of the pressure receiving area of the piston 2 is generated in the piston rod 10 to cause residual deformation. The generated structure is forcibly restored to the origin.
During the locking function (3) , the positions of the piston 2 and the piston rod 10 are firmly fixed by the incompressibility of the oil confined in the oil chambers 4 and 5 of the hydraulic cylinder 1. Therefore, for example, the seismic isolation layer is locked so as not to be deformed by a so-called fail-safe function that prevents vibration of the seismic isolation layer against wind external force or prevents damage to the seismic isolation device due to repeated vibration.
[0017]
Incidentally To give a general description of the hydraulic control circuit 3 in FIG. 4, the hydraulic pressure generated by the hydraulic pump 9, by the action switching the electromagnetic switching valve 14, the two is supplied to the main oil passage 11A or 11 B, oil return conversely It is returned to the oil tank 15. Therefore, when the on-off valve 7 of the piston 2 is fully closed and the main on-off valve 12 is fully opened, the function as a hydraulic jack is exhibited. When a large external force exceeding the maximum damping force determined by the size of the diameter of the oil passage 6 of the piston 2 is applied during the damper function with the main on-off valve 12 fully closed, the set value of the relief valve 16 of the bypass 30 is applied. Displacement of the piston 2 is limited, and the safety of the hydraulic circuit is ensured. Off valve 7 and the main oil passage 11A of the piston 2, 11 B of the main on-off valve 12 when the lock function is fully closed, respectively, the flow of oil is completely stopped. Also at this time, when an external force exceeding the maximum locking force is applied, the safety of the hydraulic circuit is maintained by the set value of the relief valve 16 of the bypass 30 .
[0018]
Note that switching between the damper function, the jack function, and the lock function is basically performed by manual operation, but switching by automatic control based on the measurement value of the vibration sensor may be employed.
[0019]
Next, FIG. 5, without providing an oil passage 6 to the piston 2 as shown in FIG. 4, showing a reference example of a configuration to avoid the hassle of processing for installing an on-off valve 7.
[0020]
That is, bypassing the respective main-off valve 12 of the supply main oil passage 11A, 11 B the hydraulic pressure from the hydraulic pump 9 to the front chamber and a rear chamber of the piston 2 in the hydraulic cylinders 1, contact the front chamber and the rear chamber The bypass oil passage 23 is provided, the on-off valve 21 and the throttle 20 are installed in the bypass oil passage 23, and the on-off means 22 of the on-off valve 21 is provided. Other configurations are the same as those in FIG.
[0021]
Accordingly, the on-off valve 21 and the throttle 20 function corresponding to the on-off valve 7 and the oil passage 6 provided in the piston 2 of FIG. 4, and the damping function, the origin returning function, and the lock are exactly the same as in the embodiment of FIG. It can be properly used for the function.
[0022]
[Effects of the present invention]
According to the multi-function damping device according to the invention of claim 1 Symbol placement, a single hydraulic cylinder type device functions not only as a damping device, locking function of preventing deformation of the base isolation layer, and earthquakes It also has an origin return function to return residual deformation of the seismic isolation layer to the origin later, and it is possible to use each function properly as necessary, improving the function and quality of the seismic isolation structure, simplifying the equipment, In addition, the facility cost and running cost can be reduced, which can greatly contribute to the improvement of the fail-safe function of the seismic isolation structure.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram showing a damper function of a multifunctional damping device of the present invention.
FIG. 2 is a conceptual diagram showing a jack function of the multifunctional attenuation device of the present invention.
FIG. 3 is a conceptual diagram showing a lock function of the multifunctional attenuation device of the present invention.
FIG. 4 is an explanatory view showing an embodiment of the multi-function attenuation device according to claim 1;
FIG. 5 is an explanatory diagram showing a reference example of a multi- function attenuation device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hydraulic cylinder 2 Piston 3 Hydraulic control circuit 4, 5 Oil chamber 6 Oil passage 7 On-off valve 8 Opening / closing control means 9 Hydraulic pump
11A, 11B main oil passage 12 main on-off valve 13 on-off control means 23 bypass oil passage 21 on-off valve 20 throttling 22 on-off means

Claims (1)

A multi-function damping device that is installed in the seismic isolation layer of the seismic isolation structure and functions as a damping function, a return to origin function, or a locking function,
The main body is constituted by a hydraulic cylinder, a piston built in the piston and the piston rod , and the hydraulic cylinder is provided with the hydraulic control circuit, and the hydraulic cylinder is connected to one structure constituting the seismic isolation layer, The piston rod is installed in connection with the other structure;
The piston includes an oil passage that communicates the oil chambers before and after the piston, and the oil passage is provided with an opening / closing valve that opens and closes the passage, and is provided with a means for controlling the opening / closing of the opening / closing valve.
A main oil passage for supplying or removing hydraulic pressure from a hydraulic pump is connected to oil chambers before and after the piston in the hydraulic cylinder, and a main on-off valve is installed in the main oil passage, and the main on-off valve is controlled to open / close. That there is a means to
A bypass is provided that bypasses the main opening / closing valve of the main oil passage and short-circuits the oil chambers before and after the piston in the hydraulic cylinder, and a combination of a relief valve and a check valve is combined with the bypass according to the set value of the relief valve A safety circuit is provided to limit the displacement of the piston;
The hydraulic control circuit is in a state of a damping function in which the opening / closing valve of the piston oil passage is fully opened and the main opening / closing valve of the main oil passage is fully closed, or the opening / closing valve of the piston oil passage is fully closed, the main on-off valve was fully open the homing function state, or the on-off valve of the oil passage of the piston is fully closed, it is switched to the configuration work in the main on-off valve also lock functions fully closed state of the main oil passage Multi-function type attenuation device characterized by

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