JP2005232955A - Aseismic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aseismic device which is not easily affected by structure of construction and can easily be mounted. <P>SOLUTION: An oil damper 1 is mounted on a pillar 101 and a beam 102. The oil damper comprises an attenuation means 2 to attenuate vibration and two fixing parts 3, 3 which are mounted on both ends of the attenuation means 2 in the attenuation direction and turnably fix the attenuation means 2 to the pillar 101 or beam 102. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vibration control device.

Conventionally, a viscoelastic damper is known as a vibration control device capable of easily and inexpensively improving the vibration control of a wooden house (see, for example, Patent Document 1).
The viscoelastic damper disclosed in Patent Document 1 includes two plate-like displacement plates and a viscoelastic body filled between the two displacement plates, and each displacement plate is a joint of a shaft assembly. Used by fixing to a certain column and beam. According to this viscoelastic damper, at the time of an earthquake, the two displacement plates are displaced in opposite directions due to the seismic force, and the viscoelastic body undergoes shear deformation to absorb the seismic energy. The seismic performance can be improved.
JP 2000-160683 A

However, since the viscoelastic damper according to Patent Document 1 has a structure in which the entire side surface (surface) of the plate-like displacement plate is fixed to a pillar or beam of a house, when attaching the viscoelastic damper to a house, In order to secure the mounting area, depending on the structure of the house, it was necessary to cut out a part of the wall or expose pillars and beams.
Further, the viscoelastic damper according to Patent Document 1 cannot be attached when the column and the beam are not at right angles, and when the attachment region is uneven or curved, the surface of the attachment region There is a problem that it takes time and effort to shape the surface into a flat state without irregularities or curvature.

  An object of the present invention is to provide a vibration control device that is not easily affected by the structure of a building and can be easily attached.

  In order to solve the above-mentioned problems, the invention according to claim 1 is the damping device attached to a building, wherein the damping means for damping the force caused by the vibration and both ends of the damping means in the direction of damping the force. Two fixing portions that are provided in a portion and rotatably fix the attenuation means to the building.

  According to a second aspect of the present invention, in the vibration damping device according to the first aspect, the damping means includes a cylindrical cylinder, a piston provided inside the cylinder, and one end portion in the moving direction of the piston. And a piston rod provided through the cylinder, and two rotating parts fixed to the fixed part. The cylinder is filled with a highly viscous fluid, and the piston is , An orifice penetrating in the moving direction of the piston is provided, one of the rotating parts is connected to the piston rod, and the other rotating part of the cylinder on the opposite side of the piston rod. It is connected to the end portion.

  According to a third aspect of the present invention, in the vibration damping device according to the first or second aspect, the fixing portion is a Sebel joint.

According to the first aspect of the present invention, the attenuation means is fixed to the building by the rotatable fixing portion.
As a result, the joint formed by the place where the two fixing parts are attached does not necessarily have to be a right angle, and is not easily affected by the place where the two fixing parts are attached and the surrounding structure, and can be easily attached.

According to the second aspect of the present invention, when the piston moves by the vibration energy transmitted through the piston rod, the highly viscous fluid passes through the orifice formed in the piston.
As a result, when high-viscosity fluid passes through the orifice, vibration energy is consumed as fluid friction energy, and vibration applied to the building can be efficiently damped, and its shape is compact. Can be. Therefore, since it is not necessary to secure a large mounting area as in the conventional viscoelastic damper, it is not necessary to cut out a wall or expose a place for mounting, and the mounting becomes easier.

According to the third aspect of the present invention, since the fixing portion is a Sebel joint, the surface where the mounting location and the fixing portion abut can be reduced.
Thus, it is obvious that the effects of the inventions of claims 1 and 2 can be obtained, and in particular, the time for shaping the adhesive surface into a flat surface without unevenness for the purpose of improving adhesiveness. It can be shortened or omitted, and the time required for mounting can be shortened.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. However, the scope of the invention is not limited to the illustrated examples.
FIG. 1 is a diagram showing a main configuration of an oil damper exemplified as a best embodiment to which the vibration damping device of the present invention is applied.

  As shown in FIG. 1, the oil damper 1 is attached by, for example, being fixed to a pillar 101 and a beam 102 of a house as a building, and a damping means 2 for damping a force caused by vibration. It consists of two fixing parts 3 and 3 which are provided at both ends in the direction of force attenuation and fix the attenuation means 2 to the house so as to be rotatable.

  As shown in FIG. 2, the damping means 2 includes a cylindrical cylinder 21, a cylinder cover 22 having an inner diameter substantially equal to the outer diameter of the cylinder 21, a piston 23 provided inside the cylinder 21, and movement of the piston 23. The piston rod 24 is connected to one end portion in the direction and provided through the cylinder 21, and the two rotating portions 25 and 25 are connected to the fixing portions 3 and 3.

Both ends 21a and 21b in the longitudinal direction of the cylinder 21 are closed, and the piston rod 24 penetrates one end 21b.
Further, in the present embodiment in which the cylinder 21 is filled with a highly viscous fluid, oil is filled.

The cylinder cover 22 has an inner diameter substantially equal to the outer diameter of the cylinder 21, one end 22 a is opened, and the other end 22 b is closed.
The cylinder cover 22 is formed by fitting and holding a part of the cylinder 21 therein. Specifically, the cylinder cover 22 completely covers one end portion 21b of the cylinder 21, and covers, for example, about two-fifths of the length in the longitudinal direction of the cylinder 21 from the end portion 21b.
Here, the outer diameter of the cylinder 21 and the inner diameter of the cylinder cover 22 are substantially the same, but the cylinder 21 can be held in the cylinder cover 22 so that it does not wobble, and the cylinder 21 is pushed into the cylinder cover 22. In other words, there is no friction when being pulled out, and a gap is formed so that air can enter and exit between the cylinder 21 and the cylinder cover 22.
The piston rod 24 that penetrates the end 21 b of the cylinder 21 is fixed to the end 22 b of the cylinder cover 22.

The piston 23 has a cylindrical shape, for example, and the outer diameter of the piston is substantially equal to the inner diameter of the cylinder 21.
An airtight member (not shown) made of a material such as rubber or polymer is provided on the side surface of the piston 23, and the piston 23 is in close contact with the side surface of the piston 23 and the inner wall of the cylinder 21. The internal space of the cylinder 21 is partitioned into a first compression chamber R1 and a second compression chamber R2.
In addition, the piston 23 includes an orifice 231 formed of a thin tube in a direction substantially parallel to the moving direction of the piston 23, that is, in a direction in which the first compression chamber R1 and the second compression chamber R2 can communicate with each other. Therefore, the oil filled in the cylinder 21 can move between the first compression chamber R1 and the second compression chamber R2 via the orifice 231.

  The piston rod 24 has, for example, a cylindrical shape, and the outer diameter of the piston rod is smaller than the outer diameter of the piston 23. In the present embodiment, for example, it is about one third of the outer diameter of the piston 23. . The piston rod 24 is connected to one end 23 b in the moving direction of the piston 23, penetrates the cylinder 21, and is joined to the end 22 b of the cylinder cover 22.

Of the rotating parts 25, 25, one rotating part 25 is connected to the end 22 b side of the cylinder cover 22 to which the piston rod 24 is fixed, and the other rotating part 25 is opposite to the piston rod 24. The cylinder 21 is connected to the end 21a side.
The rotating portions 25, 25 are provided with holes 25h through which screws that allow the rotating portion 25 to be fixed to the fixing portion 3 are passed.

  As shown in FIGS. 3 and 4, the fixing unit 3 includes a fixing plate 33 including a vertical fixing plate 31 and a horizontal fixing plate 32, a vertical fixing screw (hereinafter referred to as “screw”) 31B, and a horizontal fixing screw. (Hereinafter referred to as “screw”) 32B, washer Z, and nut N. In FIG. 4, the screws 32 </ b> B are attached to one horizontal fixing plate 32, but naturally the screws 32 </ b> B are similarly attached to all the horizontal fixing plates 32.

The vertical fixing plate 31 has a plate shape and is provided upright from one longitudinal side portion 32 a of the horizontal fixing plate 32. Further, the length of the vertical fixing plate 31 in the longitudinal direction is, for example, approximately half of the length of the horizontal fixing plate in the longitudinal direction. The vertical fixing plate 31 and the horizontal fixing plate 32 can be connected by suitable means such as an adhesive or welding.
The vertical fixing plate 31 is formed with a hole 31h through which a screw 31B for rotatably fixing the rotating portion 25 is formed. The horizontal fixing plate 32 fixes the damping means 2 to the column 101 and the beam 102. .. Are provided at five locations through which the screws 32B are inserted.

The tip of the screw 31B is formed flat and is processed safely. On the other hand, the screw 32B is formed with an acute angle at the tip, and has a shape in which wood or the like is difficult to break even when used for wood or the like.
Also, the washer Z plays a role of suppressing loosening of the screw, and a groove that can be screwed together with the screw 31B is formed in the inner peripheral portion of the nut N.

  When the damping means 2 is fixed by the fixing part 3, the rotating part 25 is fixed by the two fixing plates 33. More specifically, the two fixing plates 33 are separated from each other so that each vertical fixing plate 31 is positioned inside and the holes 31h provided in each vertical fixing plate 31 are positioned in the same straight line. Then, the fixing portion 3 is formed by arranging them in parallel. The rotating part 25 is arranged in the gap between the two fixing plates 33 and is fastened appropriately using screws 31B, 32B, washers Z, nuts N, etc., thereby fixing the rotating part 25 to the fixing part 3. .

Here, the fixing method of the rotating part 25 to the fixing part 3 and the fixing method of the oil damper 1 to the column 101 and the beam 102 by the screw 31B will be described in more detail with reference to FIG.
First, as described above, the two fixing plates 33 are arranged, and the rotating portion 25 of the damping means 2 is arranged in the gap between the fixing plates 33. Next, the screw 31B is passed through the hole 31h provided by one vertical fixing plate 31, the hole 25h of the rotating portion 25, and the hole 31h provided by the other vertical fixing plate 31 in this order. Further, the rotating portion 25 is fixed to the fixed plate 3 by passing the screw 31B through the washer Z and the nut N and fastening them. Therefore, the rotation unit 25 can rotate about the screw 31B.
In the present embodiment, the so-called Sebel joint described above is adopted as the fixed portion 3, but the rotating portion 25 connected to the fixed portion 3, such as a universal joint, can rotate or rotate. Any format is acceptable.
Similarly, the other rotating portion 25 is fixed by the fixing portion 3 to form the oil damper 1.

  Next, the oil damper 1 formed as described above is fixed to the column 101 and the beam 102. Specifically, the oil damper is fixed to the column 101 by contacting the horizontal fixing plate 32 to the column 101 and tightening the screw 32B through a hole 32h formed in the horizontal fixing plate 32.

Next, a mechanism in which the oil damper 1 attenuates forces such as earthquake motion will be described with reference to FIG. FIG. 5A is a schematic view showing the state of the stationary column 101, the beam 102, and the oil dampers 1A and 1B from a cross section, and FIG. 5B is a schematic view showing a state where an external force is applied.
When a vibration is applied to the house due to an earthquake or the like, the column 101 is tilted by an external force in the horizontal direction due to the earthquake, and a rhombus is formed by the column and the beam (see FIG. 5B). At this time, if the pillar 101 is not extinguished by external force generated by vibration, the house collapses. Here, when the oil damper 1 is attached to the pillar 101 and the beam 102, the oil damper 1A The external force can be attenuated by the action of 1B.
That is, the fixed portions 3 and 3 of the oil damper 1 </ b> A provided across the column 101 and the beam 102 are separated from each other when the column 101 is inclined. Then, the rotation parts 25 and 25 connected to the fixing parts 3 and 3 rotate, and at the same time, the cylinder 21 is pulled out from the cylinder cover 22 by the length of the separation of the fixing parts 3 and 3.
When the cylinder 21 is pulled out from the cylinder cover 22, the piston 23 inside the cylinder 21 moves in the direction of the end 21 b of the cylinder 21 at the same time. As a result, the volumes of the compression chamber R1 and the compression chamber R2 defined by the piston 23 change, and the oil charged in the compression chamber R2 moves to the compression chamber R1 through the orifice 231.
When oil passes through the inside of the orifice 231, the fluid friction energy is consumed by moving the oil while contacting the inner wall of the orifice 231, and thereby vibration energy is attenuated. The applied external force is attenuated and the shaking can be suppressed.
On the other hand, in the oil damper 1B, since the piston 23 moves in the opposite direction (in the direction of the end 21a of the cylinder 21), the oil moves from the compression chamber R1 toward the compression chamber R2, and the fluid friction energy is similarly consumed. And shaking is suppressed.
The oil damper is a so-called speed-proportional vibration control device in which the greater the speed at which an external force is applied, the greater the damping force. Therefore, the oil damper has a greater vibration control force against large shaking.

According to the oil damper 1 described above, the damping means 2 is fixed to the pillar 101, the beam 102, and the like by the fixing portions 3 and 3 via the rotatable rotating portion 25, so that the two fixing portions 3 are fixed. , 3 does not necessarily have to be a right angle, so that it is difficult to be affected by the mounting location and the surrounding structure, and the damping means 2 can be easily attached.
Further, when the piston 23 is moved by the vibration energy transmitted through the piston rod 24, the oil passes through the orifice 231 formed in the piston 23. At this time, when the oil passes through the orifice 231, vibration energy is consumed as fluid friction energy, and vibration applied to the house can be efficiently damped. Therefore, it is possible to make the shape of the oil damper 1 compact while maintaining the vibration damping function, and it is not necessary to secure a large mounting area like the conventional viscoelastic damper, so that the wall is cut out or attached. Therefore, it is not necessary to expose the place for this, and attachment becomes easier.
Furthermore, since the fixing portion 3 is made of a Sebel joint, it is possible to reduce the shape of the horizontal fixing plate, thereby reducing the surface where the mounting portion of the column 101 and the beam 102 abuts the fixing portion 3. be able to. Therefore, it is possible to shorten or omit the time for shaping the bonding surface for the purpose of improving the adhesiveness into a flat surface without unevenness, and to shorten the time required for attachment.

It is a schematic diagram for demonstrating the attachment state of the oil damper in Embodiment 1 of this invention. It is sectional drawing for demonstrating an attenuation | damping means. It is a perspective view for demonstrating a fixed plate. It is a perspective view for demonstrating the structure of an oil damper. It is explanatory drawing for demonstrating a motion of the oil damper when external force is added to a building.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Oil damper 2 Damping means 21 Cylinder 22 Cylinder cover 23 Piston 24 Piston rod 25 Rotating part 31 Vertical fixing plate 32 Horizontal fixing plate 33 Fixing plate 3 Fixing part 101 Column 102 Beam

Claims (3)

In seismic control devices attached to buildings,
Damping means for damping the force of vibration;
Two fixing portions which are provided at both ends of the damping direction of the force in the damping means, and which pivotally fix the damping means to the building;
A device for vibration control, comprising: The vibration control device according to claim 1,
The attenuation means is
A cylindrical cylinder;
A piston provided inside the cylinder;
A piston rod connected to one end of the piston in the moving direction and provided through the cylinder;
Two rotating parts fixed to the fixing part,
The cylinder is filled with a highly viscous fluid,
The piston is provided with an orifice penetrating in the moving direction of the piston,
One of the rotating parts is connected to the piston rod, and the other rotating part is connected to an end of the cylinder opposite to the piston rod. Equipment. In the vibration control apparatus according to claim 1 or 2,
An apparatus for controlling vibrations, wherein the fixed part is a sieve bell joint.

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