JP2003004096A - Multifunctional damping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multifunctional damping device which is a damping device for base isolation structure having a lock function and a return function for returning to its home position. SOLUTION: The body comprises a hydraulic cylinder and a piston which is integrated in the hydraulic cylinder, and contains a hydraulic control circuit. The piston is provided with an oil passage communicating oil chambers in front and in rear of the piston, wherein an opening and closing valve having an opening and closing control means is installed in the oil passage. A main oil passage is connected to the oil chambers in front and in rear of the piston, wherein a main opening and closing valve having an opening and closing control means is installed in the main oil passage. The hydraulic control circuit is operated in a dumping function state in which the main opening and closing valve for the main oil passage is totally closed with the opening and closing valve for the oil passage of the piston fully opened, in a return function state in which the main opening and closing valve of the main oil passage fully opened with the opening and closing valve for the oil passage of the piston totally closed, or in a lock function state in which the main opening and closing valve for the main oil passage is totally closed with the opening and closing valve for the oil passage of the piston totally closed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is installed on a seismic isolation layer of a seismic isolation structure and acts as a damping device during an earthquake or strong wind, or has a lock function of preventing deformation of the seismic isolation layer at an arbitrary position. In addition, it belongs to the technical field of a multifunctional damping device that also has a restoration function to return the residual deformation of the base isolation layer to the origin after an earthquake or a strong wind.

[0002]

2. Description of the Related Art Conventionally, it is common to install a damping device on the base isolation layer of a base isolation structure to provide a damping property to the response of the structure to an external force during an earthquake or strong wind to reduce vibration and deformation. (For example, refer to a high damping device of Japanese Patent No. 2528563).

When residual deformation occurs in the seismic isolation layer of the seismic isolation structure after an earthquake or a strong wind, a jack is separately installed as a means for returning the residual deformation to the origin, and forced deformation is applied. It is also being restored.

Conventionally, the lock function for forcibly preventing the deformation of the seismic isolation layer has not been specially installed. Therefore, there is a concern that the seismic isolation layer will vibrate each time in response to a small swarm of earthquakes or strong winds, impairing habitability, or the seismic isolation device will be repeatedly deformed many times, resulting in fatigue and damage. It was

In any case, conventionally, a locking function that functions as a damping device during an earthquake and prevents deformation of the base isolation layer as necessary, or a restoration function that restores residual deformation of the base isolation layer to the origin after an earthquake There is no multifunctional device that has both, and only each device is installed by function.

[0006]

According to the current state of the prior art as described above, in order to return the residual deformation generated in the seismic isolation layer of the seismic isolation structure to the original point by the jack after an earthquake or a strong wind. Requires a great deal of effort because it is necessary to arrange a plurality of jacks and also to arrange the jacks whenever residual deformation occurs.

Conventionally, since there is no lock function for forcibly preventing the deformation of the base isolation layer, it is possible to deal with small earthquakes and strong winds swarming at best by adjusting the performance of the damping device. There was no law.

Therefore, an object of the present invention is to provide a single hydraulic cylinder type device, not only as the damping device described above, but also as a locking function for preventing deformation of the seismic isolation layer if necessary, and after the earthquake. Is to provide a multifunctional damping device that also has a restoration function to return the residual deformation of the seismic isolation layer to the origin, and can use each function properly as needed.

[0009]

As a means for solving the above-mentioned problems, a multifunctional damping device according to the invention described in claim 1 is installed in a seismic isolation layer of a seismic isolation structure to provide damping. A multifunctional damping device that operates a function, a return-to-origin function, or a lock function, wherein a main body is composed of a hydraulic cylinder and a piston incorporated therein, and a hydraulic control circuit for the main body is provided. The piston is provided with an oil passage that communicates the oil chambers in front of and behind it, and an opening / closing valve for opening and closing the passage is installed in the oil passage, and means for controlling opening / closing of the opening / closing valve is provided. A main oil passage for supplying or removing hydraulic pressure from a hydraulic pump is connected to the oil chambers in front of and behind the piston, a main opening / closing valve is installed in this main oil passage, and means for controlling opening / closing of the main opening / closing valve is provided. Have been The hydraulic control circuit is configured such that 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, and the main oil passage is closed. The main opening / closing valve is fully opened, or the piston oil passage opening / closing valve is fully closed, and the main oil passage main opening / closing valve is fully closed. To do.

A multifunctional damping device according to a second aspect of the present invention is a multifunctional damping device that is also installed on a seismic isolation layer of a seismic isolation structure and has a damping function, a return-to-origin function or a locking function, respectively. A hydraulic cylinder and a piston incorporated therein to form a main body and a hydraulic control circuit for the main body, and supplies hydraulic pressure from a hydraulic pump to an oil chamber in front of and behind the piston in the cylinder. A main oil passage to be turned on or off, a main opening / closing valve is installed in this main oil passage, and means for controlling the opening / closing of the main opening / closing valve is provided, and the main opening / closing valve of the main oil passage is bypassed. A bypass oil passage connecting the oil chambers before and after the piston in the hydraulic cylinder is provided, an opening / closing valve and a throttle are installed in the bypass oil passage, and opening / closing means for the opening / closing valve is provided; Control The circuit is such that the bypass oil passage opening / closing valve is fully opened and the main oil passage main opening / closing valve is fully closed, or the bypass oil passage opening / closing valve is fully closed and the main oil passage main opening / closing valve is opened. It is characterized in that it is configured to operate in a fully open origin return function state or in a lock function state in which the bypass oil passage on-off valve is fully closed and the main oil passage main on-off valve is also fully closed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A multifunctional damping device according to the invention described in claim 1 is a seismic isolation system for a seismic isolation structure, as conceptually shown in FIG. 1 to FIG. It is installed in the layer and is used to operate the damping function, the homing function and the locking function, respectively.

This multi-function type damping device includes a hydraulic cylinder 1
And a piston 2 incorporated therein, a main body is constituted, and a hydraulic control circuit 3 is provided. In the figure, 10 indicates a piston rod. However, FIGS. 1 to 3 only show the outline of the hydraulic control circuit 3. In this multifunctional damping device, the hydraulic cylinder 1 is connected to one of, for example, a vibrating body (seismic isolation structure, etc.) that constitutes a seismic isolation layer, and the piston rod 3
Is connected to the other, for example, a support.

The piston 2 has an oil passage 6 for communicating the front and rear oil chambers 4 and 5, as shown in a detailed embodiment of FIG.
And an opening / closing valve 7 for opening and closing the oil passage 6 in the oil passage.
And a means 8 for controlling the opening / closing of the opening / closing valve 7 is provided. The on-off valve 7 is, for example, a solenoid valve (automatic valve), and the means 8 is an electric control circuit thereof.

Main oil passages 10 and 11 for supplying or removing hydraulic pressure from a hydraulic pump 9 are connected to oil chambers 4 and 5 in front of and behind the piston 2 in the hydraulic cylinder 1.
A main opening / closing valve 12 is installed in each of the main oil passages 10 and 11, and means 13 for controlling the opening / closing of the main opening / closing valve 12 is provided. The main opening / closing valve 12 is a manual valve or a solenoid valve (automatic valve), and the means 8 is an operation handle or an electric control circuit.

As shown in FIG. 1, the hydraulic control circuit 3 has a damping function (damper) in which the opening / closing valve of the oil passage 6 of the piston 2 is fully opened and the main opening / closing valve 12 of the main oil passages 10 and 11 is fully closed. 3 is a state in which the opening / closing valve of the oil passage 6 of the piston 2 is fully closed and the main opening / closing valves of the main oil passages 10 and 11 are fully opened as shown in FIG. As described above, the opening / closing valve of the oil passage 6 of the piston 2 is fully closed, and the main opening / closing valves of the main oil passages 10 and 11 are also fully closed.

At the time of the damper function described above, a damping action corresponding to the oil flow resistance is exerted by the throttling action based on the diameter of the oil passage 6, and the damping force of the seismic isolation layer is increased at the time of an earthquake or a strong wind, and seismic isolation is performed. Reduce the response of the structure. At the time of the jack function, the driving force required by the product of the magnitude of the hydraulic pressure supplied to the front and rear oil chambers 4 or 5 and the magnitude of the pressure receiving area of the piston 2 is generated in the piston rod 10, causing residual deformation. Forcibly restore the object to the origin.
When the lock function is performed, the positions of the piston 2 and the piston rod 10 are firmly fixed by the incompressibility of the oil trapped in the oil chambers 4 and 5 of the hydraulic cylinder 1. Therefore, for example, the seismic isolation layer is locked by a so-called fail-safe function that prevents vibration of the seismic isolation layer against external wind force or prevents damage to the seismic isolation device due to repeated vibration.

Incidentally, the hydraulic control circuit 3 shown in FIG. 4 will be outlined. The hydraulic pressure generated by the hydraulic pump 9 is switched by the electromagnetic switching valve 14 so that the two main oil passages 10 can be operated.
Alternatively, the return oil is supplied to the oil tank 11, and the return oil is returned to the oil tank 15. Therefore, the on-off valve 7 of the piston 2 is fully closed,
When the main opening / closing valve 12 is fully opened, it functions as a hydraulic jack. When a large external force exceeding the maximum damping force determined by the diameter of the oil passage 6 of the piston 2 is applied during the damper function with the main opening / closing valve 12 fully closed, the deformation is limited according to the set value of the relief valve 16. This ensures the safety of the hydraulic circuit. The oil flow is completely stopped during the lock function in which the on-off valve 7 of the piston 2 and the main on-off valve 12 of the main oil passages 10 and 11 are fully closed. Also at this time, when an external force exceeding the maximum lock force acts, the safety of the hydraulic circuit is maintained by the set value of the relief valve 16 as well.

The switching between the damper function, the jack function, and the lock function is basically a manual operation, but it is also possible to adopt an automatic control switching based on the measurement value of the vibration sensor. It

Next, FIG. 5 shows an embodiment of the invention described in claim 2. This is also an embodiment of a configuration in which the oil passage 6 is provided in the piston 2 as shown in FIG.

That is, the piston 2 in the hydraulic cylinder 1
A bypass oil passage 23 that bypasses each main opening / closing valve 12 of the main oil passages 10 and 11 for supplying the hydraulic pressure from the hydraulic pump 9 to the front chamber and the rear chamber of the above, and connects the front chamber and the rear chamber to each other, An opening / closing valve 21 and a throttle 20 are installed in the bypass oil passage 23, and an opening / closing means 22 for the opening / closing valve 21 is provided. Other configurations are common to those in FIG.

Therefore, the on-off valve 21 and the throttle 20 function as the on-off valve 7 and the oil passage 6 provided in the piston 2 of FIG. 4, and the damping function and the origin returning function are exactly the same as the embodiment of FIG. , And lock function.

[0022]

According to the multi-function type damping device of the present invention, the single hydraulic cylinder type device not only functions as a damping device but also deforms the seismic isolation layer. It also has a lock function to prevent the seismic isolation layer and a return-to-origin function to return the residual deformation of the base-isolated layer to the origin after an earthquake, and each function can be used as needed. The improvement, simplification of equipment, reduction of equipment cost and running cost can be achieved, and it can largely contribute to the improvement of the fail-safe function of the seismic isolation structure.

[Brief description of 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 damping device of the present invention.

FIG. 3 is a conceptual diagram showing a lock function of the multifunctional damping device of the present invention.

FIG. 4 is an explanatory view showing an embodiment of the multifunctional damping device according to claim 1;

FIG. 5 is an explanatory view showing an embodiment of the multifunctional damping device according to claim 2;

[Explanation of symbols]

1 hydraulic cylinder 2 pistons 3 Hydraulic control circuit 4,5 oil chamber 6 oil passages 7 on-off valve 8 Opening / closing control means 9 hydraulic pump 10, 11 Main oil passage 12 Main on-off valve 13 Opening / closing control means 23 Bypass Oilway 21 on-off valve 20 aperture 22 Opening / closing means

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Nobuyoshi Murai             Chiba Prefecture Inzai City 1-5 Otsuka 1 Stock Association             Takenaka Corporation Technical Research Institute (72) Inventor Masafumi Yamamoto             Chiba Prefecture Inzai City 1-5 Otsuka 1 Stock Association             Takenaka Corporation Technical Research Institute F term (reference) 3J048 AA06 AC04 BE03 CB21 EA38                 3J069 AA39 AA50 AA58 AA59 DD19                       EE11 EE32 EE38 EE61

Claims (2)

[Claims] 1. A multi-function type damping device, which is installed on a seismic isolation layer of a seismic isolation structure and has a damping function, a return-to-origin function or a locking function, comprising a hydraulic cylinder and a piston incorporated therein. The main body is configured with, and a configuration including a hydraulic control circuit thereof, wherein the piston is provided with an oil passage that communicates the oil chambers before and after the piston, and an opening / closing valve that opens and closes the passage is installed in the oil passage, A means for controlling the opening / closing of the opening / closing valve is provided, and a main oil passage for supplying or removing hydraulic pressure from a hydraulic pump is connected to an oil chamber in front of and behind the piston in the cylinder, and the main oil passage is connected to this main oil passage. A main opening / closing valve is installed, and means for controlling the opening / closing of the main opening / closing valve is provided. The hydraulic control circuit fully opens the opening / closing valve of the oil passage of the piston and fully closes the main opening / closing valve of the main oil passage. And the damping function state, Alternatively, the piston oil passage on-off valve is fully closed and the main oil passage main on-off valve is fully open, or the piston oil passage on-off valve is fully closed and the main oil passage main on-off valve is also open. A multifunctional damping device, which is configured to work in a fully closed lock function state. 2. A multi-function type damping device, which is installed on a seismic isolation layer of a seismic isolation structure and has a damping function, a return-to-origin function or a locking function, which comprises a hydraulic cylinder and a piston incorporated therein. The main body is configured with a hydraulic control circuit, the main oil passage for supplying or removing the hydraulic pressure from the hydraulic pump is connected to the oil chambers before and after the piston in the cylinder. A main opening / closing valve is installed in the passage, and means for controlling the opening / closing of the main opening / closing valve is provided, and the main opening / closing valve of the main oil passage is bypassed to connect the oil chambers before and after the piston in the hydraulic cylinder. A bypass oil passage is provided, an opening / closing valve and a throttle are installed in the bypass oil passage, and opening / closing means for the opening / closing valve is provided, and the hydraulic control circuit fully opens the opening / closing valve of the bypass oil passage. , main Damping function status with the main opening / closing valve of the oil passage fully closed, or return-to-origin function status with the main opening / closing valve of the bypass oil passage fully closed and the main opening / closing valve of the main oil passage fully open, or opening / closing valve of the bypass oil passage Is a fully-closed valve, and the main opening / closing valve of the main oil passage is fully closed.