JP3846797B2 - Hydraulic damper for vibration control - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
[0002]
The present invention relates to a seismic control hydraulic damper for attenuating shaking of a building structure due to an external vibration force such as an earthquake or wind.
[Prior art]
[0003]
As a conventional general damping hydraulic damper, there is a damping hydraulic damper 11 as shown in FIG. 6, for example. In the structure of this conventional damping hydraulic damper 11, a piston 14 that reciprocates in the axial direction is housed in a cylinder 12, and hydraulic chambers 12 a and 12 b are formed on both sides of the piston 14. The chambers 12a and 12b are filled with hydraulic oil. The piston 14 is provided in the vicinity of the center in the length direction of the piston rod 16.
[0004]
A valve unit 22 is provided on the side of the cylinder 12 (upper part in FIG. 6). Although not shown, the valve unit 22 is in the middle of an oil passage that communicates the hydraulic chambers 12a and 12b in the cylinder 12. In addition, a pressure regulating valve, a relief valve, and an accumulator arranged in parallel with each other are incorporated.
[0005]
Here, the pressure regulating valve is a valve that automatically adjusts the opening degree in order to define the damping coefficient, and the relief valve is automatically opened when a pressure exceeding a predetermined value considering the safety factor is applied. It is a valve that suppresses the pressure rise and protects the building structure from damage due to excessive pressure rise.
[0006]
The accumulator is a device for preventing the hydraulic oil from becoming negative pressure by supplying the hydraulic oil to the cylinder when the damping hydraulic damper is in operation, and stabilizing the performance of the damping hydraulic damper. .
[0007]
When an external force such as an earthquake or wind is applied in the axial direction of the hydraulic damper 11 for vibration control and relative movement occurs between the cylinder 12 and the piston 14, the hydraulic chambers 12a and 12b are moved from one to the other. The hydraulic oil flows through the oil passage toward the, and moves through a pressure regulating valve in the middle of the oil passage.
[0008]
At this time, the hydraulic oil receives resistance when passing through the pressure regulating valve, which attenuates the external force such as the earthquake and the wind that causes the relative movement between the cylinder 12 and the piston 14, and causes the external force such as the earthquake and the wind. A part of the vibration of the building structure can be absorbed to control the vibration.
[0009]
Such a damping hydraulic damper 11 is flexibly connected to a component of a building structure via ball joints 20 (support structure) at both ends thereof. Further, in place of such a ball joint 20, although not shown, both ends thereof are flexibly connected to constituent members of the building structure via pins of a clevis type support structure described later. There is also a hydraulic damper for vibration control.
[0010]
In this way, the connection between the damping hydraulic damper and the structural member of the building structure uses a ball joint or a clevis type support structure to prevent a bending moment from being generated in the damping hydraulic damper. It is necessary to be flexibly connected via a pin.
[0011]
[Problems to be solved by the invention]
However, since such a hydraulic damper for vibration control requires a large cylinder diameter when a large damping force is required for the vibration control operation, a large installation space is required by increasing the cylinder diameter. Is required. Thus, when the installation space of the damping hydraulic damper is increased, there is a problem that the volume of the space that can be effectively used as an office or a living space on each floor of the building structure is reduced accordingly.
[0012]
On the other hand, if an attempt is made not to reduce the volume of the space that can be used effectively, there is a problem that it is impossible to install a hydraulic damper for vibration control with a large cylinder diameter. In such a case, the number of damping dampers with a small cylinder diameter that can be stored in the installation space is arranged in parallel in the height direction, as many as the sum that can generate the necessary damping force. A method of installation is conceivable.
[0013]
However, in such a method, not only the hydraulic damper for vibration control, but also the ball joint or clevis type support structure necessary for connecting the damper to the building structural component, the valve unit, etc. Since the same number of hydraulic dampers is required, the cost is drastically increased.
[0014]
Then, this invention makes it a subject to provide the hydraulic damper for vibration control which can suppress that the width | variety of installation space becomes large and can suppress the increase in cost.
[0015]
[Means for Solving the Problems]
In order to solve the above problems, a damping hydraulic damper according to the present invention is a damping hydraulic damper having a plurality of hydraulic dampers arranged in parallel, each piston rod of the plurality of hydraulic dampers and Each cylinder part is connected to the building structure via a single support structure that is flexibly connected to the building structure, and is configured to attenuate the shaking of the building structure due to vibration external force. .
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of a hydraulic damper for vibration control according to the present invention will be specifically described with reference to the drawings.
[0017]
FIGS. 1 to 3 are views referred to for explaining a parallel-type seismic damping hydraulic damper 30 (seismic damping hydraulic damper) according to the first embodiment of the present invention. In the parallel-type damping hydraulic damper 30 shown in these drawings, the same parts as those of the conventional damping hydraulic damper 11 are denoted by the same reference numerals, and overlapping description of the same components as those in the related art is omitted. Shall be omitted.
[0018]
As shown in FIGS. 1 and 2, this parallel-type seismic control hydraulic damper 30 includes three hydraulic dampers 36 between the single support structures 32 and 34 disposed at both ends, respectively. It is arranged and assembled so as to be arranged in parallel in the middle height direction.
[0019]
The cylinder 37 (cylinder portion) of each hydraulic damper 36 is formed such that cylinder heads 38 and 40 at both ends sandwich the cylinder tube 42. Since the cylinder heads 38 and 40 at both ends of each hydraulic damper 36 are connected to each other with the cylinder heads 38 and 40 of the adjacent hydraulic dampers 36 by bolts 44 and nuts 46, the hydraulic dampers 36 are mutually connected. They are arranged in parallel and are configured integrally.
[0020]
The cylinder 37 of each hydraulic damper 36 integrally configured in this way has its cylinder head 38 fastened to the single support structure 32 by bolts 48, and the building structure via the support structure 32. It is designed to be connected to a component member.
[0021]
On the other hand, the piston rod 16 of each hydraulic damper 36 is connected to a component member of the building structure via the support structure 34 with the protruding tip portion connected to the single support structure 34. Yes.
[0022]
These support structures 32 and 34 are clevis-type support structures, and both end portions of the parallel-type seismic damper 30 are connected to structural members of the building structure via pins 33 and 35 of the support structures 32 and 34. So that they can be bent freely.
[0023]
Here, as shown in FIG. 1, FIG. 2, the support structure 32 of the clevis form, together with the two members 32a, 32b secures these cylinder head 38 of each hydraulic damper 36 crowded seen both sides or al nip The structure is such that it is connected via a pin 33 to a member 32c that is sandwiched between the members 32a and 32b and is connected to a component of the building structure . And the support structure 32 comprised by these members 32a, 32b, and 32c functions as an integrated structure after the assembly | attachment of the parallel type damping hydraulic damper 30. As shown in FIG.
[0024]
The support structure 34 includes a piston rod 16 and integrally linked member 34c of the hydraulic dampers 36 are arranged on both sides so as to sandwich this by building structure components in concatenated member 34a, and 34b However, it has a structure which is connected via the pin 35 . And the support structure 34 comprised by these members 34a, 34b, and 34c functions as an integrated structure after the assembly | attachment of the parallel type damping hydraulic damper 30. As shown in FIG.
[0025]
Although not shown, a ball joint composed of a plurality of parts may be used in place of the clevis-type support structures 32 and 34. In this case, as described above, the support structures 32 and 34 are the same. Therefore, a bending moment is not generated in the parallel-type seismic control hydraulic damper 30. These support structures 32, 34, ball joints, and the like function as an integral structure even if they are composed of a plurality of members and parts, and are referred to as “single support structures”.
[0026]
As described above, since the both ends of the parallel-type seismic damper 30 are connected to the constituent members of the building structure via the single support structures 32 and 34, the respective hydraulic dampers 36 are provided. It is not necessary to connect the support structure every time, and the number of parts can be reduced, so that an increase in cost can be suppressed.
[0027]
In this embodiment, both end portions of the parallel-type seismic control hydraulic damper 30 are connected to the structural members of the building structure via the single support structures 32, 34. Only one end of the hydraulic damper 30 for vibration control, that is, only one of the cylinder 37 and the piston rod 16 is connected to a component of the building structure through a single support structure, and the other through a plurality of support structures. It may be connected.
[0028]
Next, based on FIG. 3, the internal structure of the parallel-type seismic damper 30 and the valve unit 22 will be described. The pistons 14 that reciprocate in the axial direction in the cylinders 37 are fixed to the piston rods 16, and the piston rods 16 are connected to a single support structure 34. It is designed to move in synchronization with the direction.
[0029]
Therefore, for example, when the parallel-type damping hydraulic damper 30 is extended by an external force such as an earthquake or wind, each piston 14 in each hydraulic damper 36 is synchronized with the cylinder 37 to the right in the figure. Since it moves in the direction, the left hydraulic chamber 12a of each piston 14 expands synchronously, and the right hydraulic chamber 12b contracts synchronously.
[0030]
The parallel-type seismic damping hydraulic damper 30 is provided with an oil passage 50 communicating with the hydraulic chambers 12a and 12b in the cylinder heads 38 and 40 of the respective hydraulic dampers 36. The openings are opposed to each other at the contact surfaces of 40.
[0031]
With this structure, each expansion-side hydraulic chamber 12a in each hydraulic damper 36 communicates with the expansion-side hydraulic chamber 12a in the cylinder 37 of the adjacent hydraulic damper 36, and The contraction-side hydraulic chambers 12b are also in communication with the contraction-side hydraulic chambers 12b in the adjacent cylinders 37.
[0032]
Therefore, by providing one valve unit 22 that communicates with the oil passage 50 of the uppermost hydraulic damper 36 in the parallel-type seismic damper 30 without arranging the valve unit 22 for each hydraulic damper 36. The valve unit 22 functions as a common valve unit for the plurality of hydraulic dampers 36, and can adjust the damping coefficient of the parallel-type seismic damping hydraulic damper 30 as a whole.
[0033]
In the present embodiment, the internal structure of the parallel-type damping hydraulic damper 30 has been described based on the case where the hydraulic damper 36 extends. However, when the hydraulic damper 36 contracts, the hydraulic chamber 12a contracts. Needless to say, the hydraulic chamber 12b expands.
[0034]
A relief valve 52 is provided inside the piston 14 of each hydraulic damper 36. By providing the relief valve 52 in the piston 14, safety can be improved against damage to the hydraulic damper 36 due to overload. A relief valve may be provided in the valve unit 22.
[0035]
As described above, the parallel-type seismic damping hydraulic damper 30 is provided with only one common valve unit 22 without disposing the valve unit 22 for each hydraulic damper 36. And the increase in cost can be suppressed.
[0036]
Further, in the present embodiment, only one common valve unit 22 is provided. However, as another embodiment, as in the case of the conventional seismic damping hydraulic damper 11, the hydraulic pressure is set for each hydraulic damper 36. The chambers 12a and 12b communicate with each other through an oil passage, and a valve unit 22 may be provided for each hydraulic damper 36 in the middle thereof.
[0037]
Even in this case, the parallel-type seismic damper 30 is configured such that both ends thereof are connected to the structural members of the building structure by a single support structure 32, 34, or only one of the ends. However, by being connected with the structural member of a building structure by the single support structure, the increase in cost can be suppressed in the range.
[0038]
In the first embodiment, one common valve unit 22 is provided in the uppermost one of the hydraulic dampers 36. However, the common valve unit 22 is provided in each hydraulic damper 36. One of the other may be provided.
[0039]
Next, a second embodiment of the present invention will be described. FIG. 4 shows a parallel-type seismic damping hydraulic damper 60 according to the second embodiment of the present invention. The parallel-type seismic damping hydraulic damper 60 is exactly the same as the parallel-type seismic damping hydraulic damper 30 according to the first embodiment except that the leg portion 54 is provided.
[0040]
In such a parallel-type seismic damping hydraulic damper 60, since the plurality of hydraulic dampers 36 are arranged in parallel in the height direction, the overall center of gravity becomes high, and it is easy to fall down. Therefore, the stability and safety of the parallel-type seismic control hydraulic damper 60 can be improved by providing the leg portion 54 for preventing overturning.
[0044]
In the first and second embodiments, the valve unit 22 is provided, and the damping coefficient of the parallel type damping hydraulic dampers 30 and 60 is adjusted by the pressure regulating valve built in together with the relief valve. However, a pressure regulating valve or a relief valve may be provided inside the piston 14 of each hydraulic damper 36.
[0045]
Although not shown, in this case, only one common accumulator is provided in the middle of an oil passage in one of the hydraulic dampers 36 that connects the expansion-side hydraulic chamber 12a and the contraction-side hydraulic chamber 12b. Also good.
[0046]
If the common valve unit 22 or the common accumulator cannot be fixed to any of the hydraulic dampers 36 in the parallel type damping hydraulic damper 30 due to various circumstances, the valve unit 22 Alternatively, the accumulator may be separated from the hydraulic damper 36 and disposed at a position around the parallel-type seismic damper 30 and connected to one of the hydraulic dampers 36 by external piping.
[0047]
In the first and second embodiments, the hydraulic chambers 12a and 12b of the respective hydraulic dampers 36 are provided with an oil passage 50 in the cylinder heads 38 and 40 so as to contact the adjacent cylinder heads 38 and 40. However, as another embodiment, the oil passages may be extended to the outside of the cylinder 37 so that the hydraulic chambers 12a and 12b of the adjacent hydraulic dampers 36 communicate with each other.
[0048]
Although not shown, in such a case, it is not necessary to bring the cylinders 37 of the hydraulic dampers 36 into close contact with each other in order to connect the oil passages 50 with the contact surfaces of the cylinder heads 38 and 40. The cylinder 37 may not be integrally connected to each other by the bolt 44 and the nut 46.
[0049]
Furthermore, in the first and second embodiments, the hydraulic dampers 36 are arranged in parallel in the height direction in order to reduce the width of the installation space of the parallel type damping hydraulic dampers 30 and 60 . If the height direction is limited because it is installed on the ceiling or the like, the hydraulic dampers 36 may be arranged in parallel in the horizontal direction.
[0050]
【The invention's effect】
As described above, according to the present invention, it is possible to suppress an increase in the width of the installation space of the parallel-type seismic damping hydraulic damper. Can be prevented.
[0051]
In addition, by connecting both ends or one end of the parallel-type damping hydraulic damper to a single support structure, a plurality of hydraulic dampers can be integrated, and one common valve unit or the like can be used. Therefore, an increase in cost can be suppressed.
[Brief description of the drawings]
FIG. 1 is a front view of a parallel seismic damping hydraulic damper 30 according to a first embodiment of the present invention.
FIG. 2 is a plan view of the parallel-type seismic control hydraulic damper 30 in FIG. 1;
FIG. 3 is an internal cross-sectional view of the parallel-type seismic control hydraulic damper 30 in FIG. 1;
FIG. 4 is a front view showing a parallel-type damping hydraulic damper 60 according to a second embodiment of the present invention.
FIG. 5 is a front view showing a parallel-type seismic damping hydraulic damper 70 according to a third embodiment of the present invention.
6 is a cross-sectional view showing a conventional seismic damping hydraulic damper 11. FIG.
[Explanation of symbols]
11 Damping hydraulic dampers 12a and 12b Hydraulic chamber 14 Piston 16 Piston rod 20 Ball joint 22 Valve unit 30 Parallel type damping hydraulic damper 32 Support structure 32a, 32b, 32c Member 33 Pin 34 Support structure 34a, 34b, 34c Member 35 Pin 36 Hydraulic damper 37 Cylinder 38, 40 Cylinder head 42 Cylinder tube 44 Bolt 46 Nut 48 Bolt 50 Oil passage 52 Relief valve 54 Leg 60 Parallel type damping hydraulic damper 70 Parallel type damping hydraulic damper 72, 74 Support Construction

Claims (5)

A damping hydraulic damper having a plurality of hydraulic dampers stacked in parallel,
Each piston rod and / or each cylinder part of the plurality of hydraulic dampers is connected to the building structure via a single support structure that is flexibly connected to the building structure,
A hydraulic damper for vibration control, which attenuates shaking of building structures caused by vibration external force. Each of the plurality of hydraulic dampers has two hydraulic chambers sandwiching a piston inside the cylinder portion;
When said plurality of hydraulic damper is expanded or contracted simultaneously, with each of the hydraulic chambers on the side that extends communicates, in claim 1 in which each of the hydraulic chambers on the side is characterized in that so as to communicate with the contracting The listed hydraulic damper for vibration control.   The damping hydraulic damper according to claim 1 or 2, wherein the plurality of hydraulic dampers share one valve unit or accumulator.   4. The hydraulic damper for vibration control according to claim 2, wherein a valve unit or an accumulator is disposed on the hydraulic damper and is connected to the hydraulic damper by an external pipe.   5. The hydraulic damper for vibration control according to any one of claims 1 to 4, wherein a leg portion for preventing overturning is provided.

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