JP3796216B2 - Installation method of hydraulic damper - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for attaching a hydraulic damper to a building.
[0002]
[Prior art]
Conventionally, hydraulic dampers have been used to reduce the shaking of buildings due to earthquakes and winds.
The hydraulic damper is provided with a piston in a cylinder, and the cylinder and the piston rod are fixed to a building. The cylinder is filled with hydraulic oil. When the building is shaken, the hydraulic oil in the cylinder is compressed by the movement of the piston, and a resistance force against the external force is generated to attenuate the vibration.
A cylinder is divided into two oil chambers by a piston, and a hydraulic damper in which piston rods are provided on both sides of the cylinder is referred to as a “double rod” type hydraulic damper. Conventionally, in order to attenuate the vibration of a building, a double rod type hydraulic damper is often used. (For example, see Patent Document 1)
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 11-303926
[Problems to be solved by the invention]
However, the double rod type hydraulic damper is large, and when it is attached to a building, it is attached to a brace or the like provided between the buildings or between the buildings via bolts, etc., and the structure is complicated. There was a problem that the installation to the building was troublesome.
In addition, it is necessary to provide a complicated spherical bearing so that it can follow earthquake deformation.
[0005]
The present invention has been made in view of such problems, and an object of the present invention is to provide a method of attaching a hydraulic damper that is downsized and easy to attach to a building. .
[0006]
[Means for Solving the Problems]
The present invention for achieving the above-described object is an attachment method for attaching a hydraulic damper to a building, wherein the hydraulic damper includes a cylinder filled with hydraulic oil, a piston moving in the cylinder, A piston rod having one end provided on the piston and the other end protruding outside through the cylinder; and a spring constant capable of following the response of the building, the piston and the piston rod being A spring member that presses the piston rod in a protruding direction and maintains contact between the piston rod and the building, and in a state where the spring member is compressed, the hydraulic damper is was inserted into the mounting portion, it is in contact with said spring member is an elongated release the compressive force, the building the end of the piston rod by the force which the spring member presses A method of attaching the hydraulic damper, characterized in that that.
[0007]
Here, according to the present invention, in the direction in which the piston rod protrudes to the outside, the hydraulic damper having a spring member that presses the piston and the piston rod is compressed and inserted into a predetermined mounting location. The hydraulic damper can be easily attached by extending the spring member.
[0008]
Here, the hydraulic damper attached to the building generates a damping force when moving in the direction in which the piston rod is compressed, and does not generate a damping force when moving in the direction in which the piston rod is pulled. The spring member preferably has a spring constant that allows the piston rod to follow the response of the building.
[0009]
Moreover, in this invention, the piston rod protrudes in the one side of a cylinder, and the rod is not provided in the oil chamber of the side compressed by a piston. Therefore, the hydraulic oil in the oil chamber compressed by the piston can receive an extra compression force as much as the piston rod is not provided, and is effectively compressed. Therefore, if the same compression force is sufficient, the hydraulic damper can be miniaturized.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail based on the drawings. FIG. 1 is a schematic configuration diagram of a hydraulic damper 1 attached to a building by the attachment method according to the present embodiment.
[0011]
In the hydraulic damper 1 shown in FIG. 1, a piston 5 is movably provided in a cylindrical cylinder 3. A cylindrical piston rod 7 is provided on one side of the piston 5, and the piston rod 7 projects outside through the cylinder 3. The tip of the piston rod 7 is in contact with the building. For example, as shown in FIGS. 5 and 6, the tip of the piston rod 7 contacts the brace 37.
The hydraulic damper 1 is a “single rod” type hydraulic damper because the piston rod projects only on one side of the cylinder 3.
[0012]
A spring mounting member 4 is provided on the piston rod 7. A spring 2 is provided between the spring mounting member 4 and the surface of the cylinder 3 from which the piston rod 7 projects. The spring 2 expands and contracts by the movement of the piston rod 7. The number of springs to be installed and the mounting style are not limited to this.
[0013]
The inside of the cylinder 3 is divided into a first oil chamber (head side oil chamber) 9 and a second oil chamber (rod side oil chamber) 11 by the piston 5. Here, the rod side is the side where the piston rod 7 is attached to the piston 5, and the head side is the side where the piston rod 7 is not attached to the piston 5. The cylinder 3, the piston 5, the piston rod 7, etc. are made of metal.
[0014]
The first oil chamber 9 and the second oil chamber 11 are filled with hydraulic oil.
Several flow paths are provided in the piston 5, and a relief valve 15, a check valve 17, and an orifice 19 are provided in the flow path.
[0015]
The check valve 17 opens when the hydraulic oil flows from the second oil chamber 11 to the first oil chamber 9 side, and allows the hydraulic oil to flow from the second oil chamber 11 to the first oil chamber 9 side. When the hydraulic oil tries to flow in the reverse direction, the hydraulic oil closes to prevent the hydraulic oil from flowing in the reverse direction. That is, the hydraulic oil flows only in the direction B in the figure through the check valve 17.
[0016]
The relief valve 15 opens when the pressure of the hydraulic oil in the first oil chamber 9 exceeds the relief load, and allows the hydraulic oil to flow from the first oil chamber 9 side to the second oil chamber 11 side. When the hydraulic oil flows from the first oil chamber 9 side to the second oil chamber 11 side and the pressure in the first oil chamber 9 becomes lower than the relief load described above, the relief valve 15 is closed and the hydraulic oil is The oil does not flow from the first oil chamber 9 side to the second oil chamber 11 side. Further, when the hydraulic oil is about to flow from the second oil chamber 11 side to the first oil chamber 9 side, the relief valve 15 is closed to prevent such flow.
[0017]
Accordingly, the relief valve 15 is opened only when the pressure of the hydraulic oil in the first oil chamber 9 exceeds the relief load, and the hydraulic oil flows in the direction C in the drawing.
As described above, the spring 2 is provided between the spring mounting member 4 of the piston rod 7 and the surface of the cylinder 3. The piston 2 receives the force in the A direction by the spring 2, and the tip of the piston rod 7 is in contact with the brace 37. That is, the spring constant of the spring 2 is adjusted so that the tip of the piston rod 7 is in contact with the brace 37.
[0018]
An accumulator 21 is provided on the second oil chamber 11 side of the cylinder 3. The accumulator 21 is connected to the second oil chamber 11.
The accumulator 21 absorbs a volume difference between the first oil chamber 9 and the second oil chamber 11 and a volume change due to the temperature of the hydraulic oil. That is, since the piston rod 7 exists in the second oil chamber 11, there is a volume difference between the first oil chamber 9 and the second oil chamber 11 corresponding to the piston rod 7.
[0019]
Next, the operation of the hydraulic damper 1 will be described with reference to FIGS. As will be described later, the cylinder 3 of the hydraulic damper 1 is fixed to the building as shown in FIG. 6, and the end of the piston rod 7 contacts the brace. Assume that the building is shaken due to earthquake force applied to the building.
[0020]
In the state shown in FIG. 1, when an external force is applied due to an earthquake or the like and the piston 5 and the piston rod 7 try to move in the direction A in the drawing, the hydraulic oil in the second oil chamber 11 passes through the check valve 17 to the first oil chamber. Flows to the 9th side. At this time, the relief valve 15 is closed, and hydraulic oil does not flow from the second oil chamber 11 to the first oil chamber 9 via the relief valve 15. The piston rod 7 receives a force directed in the A direction by the spring 2.
[0021]
Therefore, as shown in FIG. 2, the piston 5 and the piston rod 7 move to the rod side. At this time, the hydraulic oil in the second oil chamber 11 flows to the first oil chamber 9 side via the check valve 17, so the hydraulic oil in the second oil chamber 11 is not compressed.
[0022]
From the state of FIG. 2, the direction of shaking is reversed, and as shown in FIG. 3, the piston 5 and the piston rod 7 try to move in the D direction. At this time, the check valve 17 is closed. Since the relief valve 15 is initially closed, when the piston 5 moves in the direction D, the hydraulic oil in the first oil chamber 9 is compressed.
[0023]
Since the hydraulic oil in the first oil chamber 9 is compressed, a damping force due to the compression force of the hydraulic oil is applied to the piston 5, and this force acts in a direction to cancel the external force, so that the vibration is attenuated.
[0024]
When the speed at which the piston 5 further moves in the direction D increases, the pressure of the hydraulic oil in the first oil chamber 9 further increases, and the pressure of the hydraulic oil in the first oil chamber 9 exceeds the relief load. Opens and hydraulic oil flows from the first oil chamber 9 side to the second oil chamber 11 side.
[0025]
Thus, when the piston 5 moves in the direction D, the hydraulic oil in the first oil chamber 9 is compressed, so that a damping force is applied to the piston 5 from the hydraulic oil, and this damping force causes vibration due to external force, that is, seismic force. Work in the direction to counteract.
[0026]
That is, when the piston 5 and the piston rod 7 move in the direction D, the pressure of the hydraulic oil in the first oil chamber 9 is maintained at a constant value (relief load) determined by the relief valve 15, and the first oil The hydraulic oil in the chamber 9 is compressed, and a reaction force is applied to the piston 5 from the hydraulic oil.
[0027]
When the piston 5 moves to the position shown in FIG. 4, the moving direction of the piston 5 changes, and the piston 5 and the piston rod 7 move in the A direction. When the compressed portion of the hydraulic oil in the first oil chamber 9 is released, the check valve 17 opens, and the hydraulic oil flows from the second oil chamber 11 to the first oil chamber 9 side. Thereafter, the same operation is repeated.
[0028]
Thus, when the hydraulic damper 1 is attached to the building and an external force is applied due to an earthquake or the like, as shown in FIGS. 1 to 4, when the piston 5 moves in the direction A, the resistance force against the external force is Although not generated, as shown in FIG. 3, when the piston 5 and the piston rod 7 move in the direction D, the hydraulic oil in the first oil chamber 9 is compressed. Since the force works in the direction of canceling external forces such as earthquakes, the vibration is attenuated.
[0029]
As shown in FIG. 3, when the piston 5 moves in the D direction, the hydraulic oil in the first oil chamber 9 is compressed, but an orifice 19 or a pressure regulating valve is provided to remove the hydraulic oil from the first oil chamber 9. By flowing the working oil to the second oil chamber 11 side, it is possible to prevent the pressure of the working oil in the first oil chamber 9 from rising rapidly. Here, the pressure regulating valve refers to a valve that keeps the damping coefficient C constant for optimally reducing the response of the building.
[0030]
Next, an example in which the hydraulic damper 1 shown in FIGS. 1 to 4 is attached to a high-rise building will be described.
FIG. 5 shows a high-rise building 31 to which the hydraulic damper 1 is attached, and FIG. 6 is an enlarged view of a portion where the hydraulic damper 1 is attached to the high-rise building 31.
[0031]
The high-rise building 31 has a large number of beams 33, columns 35, and the like. As shown in FIG. 6, a column side fixing member 47a is provided on the column 35a and the beam 33b, and a column side fixing member 47b is provided on the column 35b and the beam 33b. Further, braces 37a and 37b are provided in the diagonally downward direction from the beam 33a. Bases 49a and 49b are installed at the ends 41a and 41b of the braces 37a and 37b, respectively.
[0032]
7 and 8 are views for explaining a mounting method of the hydraulic damper 1b. As shown in FIG. 7, the hydraulic damper 1b is inserted between the base 49b and the column-side fixing member 47b in a state where the spring 2b is compressed. Next, as shown in FIG. 8, the compression force of the spring 2b is released, and the tip of the piston rod 7b comes into contact with the column-side fixing member 47b by the force by which the spring 2b pushes the spring mounting member 4b.
[0033]
At this time, the ends of the base 49b and the cylinder 3b may be attached so that the hydraulic damper 1b does not move between the base 49b and the column side fixing member 47b. For example, the ends of the base 49b and the cylinder 3b may be fixed with bolts or the like, a protrusion is provided at the end of the cylinder 3b, an insertion hole is provided in the base 49b, and the protrusion and the insertion hole are fitted together. May be attached.
[0034]
Similarly, the hydraulic damper 1a is also mounted between the base 49a and the column side fixing member 47a. Thus, the tip of the piston rod 7a comes into contact with the column-side fixing member 47a by the force with which the spring 2a of the hydraulic damper 1a presses the spring mounting member 4a.
[0035]
As shown in FIG. 6, a hydraulic damper 1a is attached between the column side fixing member 47a and the base 49a with the brace end portions 41a and 41b interposed therebetween, and a hydraulic type is installed between the column side fixing member 47b and the base 49b. Attaching the damper 1b is referred to as “attaching a hydraulic damper in series”.
[0036]
Thus, the hydraulic dampers 1a and 1b are easily attached to the bases 49a and 49b so that the tips of the rods 7a and 7b come into contact with the column-side fixing members 47a and 47b by expanding and contracting the springs 2a and 2b. be able to.
By using a spring having an appropriate spring constant for the springs 2a and 2b, or by appropriately adjusting the expansion and contraction force of the spring 2a, it is possible to cope with attachment to various buildings.
[0037]
Here, when a seismic force or the like is applied to the high-rise building 31, the beam 33, the column 35, and the braces 37a and 37b also vibrate, but the piston 2a keeps contact with the column-side fixing member 47a by the action of the spring 2a. is doing. Similarly, the piston rod 7b maintains contact with the column-side fixing member 47b by the action of the spring 2b.
[0038]
When the high-rise building 31 moves in the A direction, a resistance force by the hydraulic damper 1b is applied to the brace 37b. When the high-rise building 31 moves in the D direction, a resistance force by the hydraulic damper 1a is applied to the brace 37a. The vibration of the high-rise building 31 is reduced.
[0039]
The hydraulic damper 1 is a “single rod” type hydraulic damper in which a piston rod 7 projects from one side of the cylinder 3. On the other hand, there is a “double rod” type in which piston rods protrude from both sides of the cylinder. In the hydraulic damper 1, the piston rod 7 is attached only to the second oil chamber 11 side.
[0040]
Therefore, in this single rod type hydraulic damper 1, the area of the first oil chamber 9 in contact with the hydraulic oil of the cylinder 3, that is, the pressure receiving area, is wider than that of the second oil chamber 11 by the piston rod 7. . Accordingly, the first oil chamber 9 is more effectively compressed than in the case of both rods, and a vibration damping force can be obtained. Therefore, compared with the case of both rods, the hydraulic damper 1 of the present application can reduce the diameter of the cylinder and the installation area is also reduced.
[0041]
Further, it is desirable that the piston rods 7a and 7b follow the earthquake deformation. Therefore, the spring constants of the springs 2a and 2b are set such that the piston rods 7a and 7b follow the response of the building such as the high-rise building 31. Specifically, the spring constants of the springs 2a and 2b are, for example, about 2 to 3 times the natural frequency of the high-rise building 31.
[0042]
This is because if the spring is weak, the building response cannot be followed, and the piston rods 7a, 7b and the column side fixing members 47a, 47b are separated from each other and generate an impact when they come into contact again.
Moreover, although the hydraulic dampers 1a and 1b are installed in pairs as shown in FIG. 6, only one (for example, only the hydraulic damper 1a) may be installed.
[0043]
Next, another method for attaching the hydraulic damper 1 will be described. FIG. 9 is a diagram illustrating a method of installing the hydraulic damper 1 c in the high-rise building 31. Braces 57 are installed obliquely on the brace installation members 56 installed on the columns 35a and the beams 33b as shown in FIG. A base 59 is provided at the tip of the brace 57.
[0044]
The cylinder portion of the hydraulic damper 1 c is fixed to the base 59, and the tip of the piston rod 7 c of the hydraulic damper 1 c is in contact with the column side fixing member 58. At this time, the tip of the piston rod 7c comes into contact with the column-side fixing member 58 by the force by which the spring 2c of the hydraulic damper 1c presses the spring mounting member 4c. That is, the hydraulic damper 1c can be easily attached to the base 59 by using a spring having an appropriate spring constant for the spring 2c.
[0045]
Here, when an earthquake force or the like is applied to the high-rise building 31, the beam 33, the column 35, and the brace 57 also vibrate, but the piston rod 7c maintains contact with the column-side fixing member 58 by the action of the spring 2c. Yes. When the high-rise building 31 moves in the direction A, the piston rod 7c of the hydraulic damper 1c follows the vibration by the spring 2c, and the same resistance force as in the operation of the hydraulic damper shown in FIGS. Occurs, and the vibration of the high-rise building 31 is reduced.
[0046]
Also in the mounting method of the hydraulic damper shown in FIG. 9, with the spring 2c compressed, the hydraulic damper 1c is inserted between the base 59 and the column side fixing member 58 to release the compressive force of the spring 2c, The hydraulic damper 1c is attached by extending the spring 2c. At this time, the cylinder portion of the hydraulic damper 1c may be attached to the base 59, and the tip of the piston rod 7c does not need to be fixed, so that the attaching operation is easy.
[0047]
Next, another method for attaching the hydraulic damper 1 will be described. FIG. 10 is a view showing a method of attaching the hydraulic damper 1d in the high-rise building 31. As shown in FIG. As shown in FIG. 10, the column side fixing member 68a is provided on the column 35b and the beam 33a, and the column side fixing member 68b is provided on the column 35b and the beam 33b. The column-side fixing member 68a is provided with a brace 67a in the lower diagonal direction, and the column-side fixing member 68b is provided with a brace 67b in the upper diagonal direction.
[0048]
Here, the coupling portion 70a between the column-side fixing member 68a and the brace 67a and the coupling portion 70b between the column-side fixing member 68b and the brace 67b may be fixed or may be a hinge.
The other ends of the braces 67a and 67b are joined and fixed.
[0049]
A base 66 is installed on the beam 33b. The hydraulic damper 1d is inserted between the base 66 and the joint between the braces 67a and 67b in a state where the spring 2d is compressed. Thereafter, the compression force of the spring 2d is released, the spring 2d is extended, and the hydraulic damper 1d is attached. A cylinder portion of a hydraulic damper 1d is attached to the base 66 with a bolt or the like. The tip of the piston rod 7d comes into contact with the joint 73 by the force by which the spring 2d of the hydraulic damper 1d pushes the spring mounting member 4d. That is, the hydraulic damper 1d can be easily attached to the high-rise building 31 by using a spring having an appropriate spring constant for the spring 2d.
[0050]
FIG. 11 is a view for explaining the operation of the hydraulic damper 1d when the seismic force of the high-rise building 31 is applied. When the seismic force is applied and the columns 35a and 35b are distorted as shown in FIG. 11, the positions of the braces 67a and 67b coupled to the columns 35b and the like at the coupling portions 70a and 70b are also shifted. For example, the center line of the brace is C1 as shown in FIG. 10, but the case where the center line of the brace is shifted to C2 as shown in FIG. 11 due to the seismic force is taken as an example.
[0051]
In this case, as shown in FIG. 11, the joint 73 of the braces 67a and 67b is displaced upward compared to the normal state of FIG. At this time, the piston rod 7d of the hydraulic damper 1d is stretched upward by following the upward displacement due to the seismic force while the tip of the spring 2d pressing the spring mounting member 4d is kept in contact with the joint 73. Will be.
That is, this is the same as the vibration control operation of the hydraulic damper 1 described with reference to FIGS. 1 to 4, and the force to restore the upward displacement of the braces 67a and 67b is applied. Become.
[0052]
Thus, the vibration control effect can also be obtained by installing the hydraulic damper 1d as shown in FIGS. Further, since the hydraulic damper 1d can be attached to the base 66 with a bolt or the like, it can be easily attached to the high-rise building 31. The hydraulic damper 1d is a single rod type and can be reduced in size as compared with the double rod type.
[0053]
Next, another hydraulic damper 51 will be described. FIG. 12 shows a hydraulic damper 51. The same components as those of the hydraulic damper 1 shown in FIG. In the hydraulic damper 51, the flow paths 53 and 55 are constituted by pipes or the like outside the cylinder 3, the relief valve 15 a is provided in the flow path 53, and the check valve 17 a is provided in the flow path 55. The flow paths 53 and 55 connect the first oil chamber 9 and the second oil chamber 11.
[0054]
In this manner, the relief valve 15a and the check valve 17a may be configured not to be provided in the piston 5. Furthermore, the orifice 19 is not provided in the piston 5, but a flow path can be provided outside the cylinder 3, and the flow path can be used as an orifice.
[0055]
Further, another hydraulic damper 81 will be described. FIG. 13 is a view showing the hydraulic damper 81. The operation of the hydraulic damper 81 is the same as that of the hydraulic damper 1 shown in FIG. 1 except that the installation position of the spring 13 is different. As with the hydraulic damper 1, the hydraulic damper 81 is inserted into the installation location with the spring 13 compressed, and the spring 13 is released so that the tip of the piston rod comes into contact with the building. The same seismic control effect can be obtained.
[0056]
When the hydraulic damper 81 is installed in the high-rise building 31 shown in FIGS. 5 and 6, the cylinder 3 is fixed to the beam or column of the high-rise building and the tip of the piston rod 7 is installed so as to contact the brace 37. . Accordingly, the hydraulic damper 81 is also easy to attach and is a single rod type, and therefore can be reduced in size as compared with both rod pieces.
[0057]
Also in the hydraulic damper 81, as in the hydraulic damper 51 shown in FIG. 12, a flow path is constituted by a pipe or the like outside the cylinder 3, and a relief valve 15a, a check valve 17a, or an orifice 19 is provided in the flow path. It may be provided.
[0058]
The above-described hydraulic dampers 51 and 81 can be easily mounted and can be reduced in size as compared with the double rod type because of the single rod type.
The technical scope of the present invention is not limited to the installation method of the hydraulic damper described above.
For example, although the hydraulic dampers 1, 51, 81 described above are attached to a high-rise building, they may be attached not only to the high-rise building but also between layers of buildings or between buildings.
[0059]
【The invention's effect】
As described above in detail, according to the present invention, the hydraulic damper can be easily attached to the building.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a hydraulic damper 1. FIG. 2 is a diagram showing an operation of the hydraulic damper 1. FIG. 3 is a diagram showing an operation of the hydraulic damper 1. FIG. FIG. 5 is a schematic configuration diagram of a high-rise building 31. FIG. 6 is an enlarged view of a mounting portion of a hydraulic damper. FIG. 7 is an explanatory diagram of a mounting method of the hydraulic damper 1b. FIG. 9 is an explanatory diagram of a mounting method of the hydraulic damper 1c. FIG. 10 is an explanatory diagram of a mounting method of the hydraulic damper 1d. FIG. 11 is an explanatory diagram of a mounting method of the hydraulic damper 1d. Schematic configuration diagram of hydraulic damper 51 [FIG. 13] Schematic configuration diagram of hydraulic damper 81 [Explanation of symbols]
1, 51, 81 ... Hydraulic damper 2 ... Spring 3 ... Cylinder 5 ... Piston 7 ... Piston rod 9 ... First oil chamber 11 ... Second oil chamber 15 ... ... Relief valve 17 ... Check valve 19 ... Orifice 21 ... Accumulator 31 ... High-rise building 33 ... Beam 35 ... Column 37 ... Brace

Claims (3)

A mounting method for attaching a hydraulic damper to a building,
The hydraulic damper is
A cylinder filled with hydraulic oil;
A piston moving in the cylinder;
A piston rod having one end provided on the piston and the other end protruding outside through the cylinder;
A spring member having a spring constant capable of following the response of the building , pressing the piston and the piston rod in a direction in which the piston rod protrudes to the outside, and maintaining contact between the piston rod and the building ; ,
Comprising
With the spring member compressed, the hydraulic damper is inserted into a predetermined mounting location, the spring member is extended to release the compressive force, and the end of the piston rod is pushed by the force of the spring member. A method for mounting a hydraulic damper, wherein the hydraulic damper is brought into contact with a building .   The hydraulic damper generates a damping force when the piston rod moves in a compressing direction, and does not generate a damping force when the piston rod moves in a pulling direction. The method for mounting a hydraulic damper according to claim 1.   2. The method for mounting a hydraulic damper according to claim 1, wherein the hydraulic damper is connected in series to a brace provided between column beam joints.

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