JP3773159B2 - Oil damper mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an oil damper mounting structure, and more particularly to an oil damper mounting structure suitable for coupling a vibration damping oil damper to a column beam frame side of a structure.
[0002]
[Prior art]
A high-rise building, a high-rise building that is composed of a large number of column members standing in the vertical direction and a large number of beam members extending in the vertical direction between two adjacent column materials to form a large number of rectangular column beam structures in the vertical direction Towers are known, and when an external vibration force such as an earthquake acts on these structures, or when strong winds act, the entire structure swings or a bending moment is generated in the column material, causing the upper part of the structure to bend. Such problems occur. For this reason, a vibration damping device in which a brace and an oil damper are combined with the above rectangular column beam frame is conventionally damped to attenuate an external force such as an earthquake to prevent the structure from being shaken.
[0003]
Such a vibration damping device is disclosed in, for example, Japanese Patent No. 2513356, but when an oil damper is attached to a column beam frame, the structure shown in FIGS. 4 and 5 is employed. .
[0004]
The oil damper mounting structure shown in FIG. 4 is provided with bifurcated brackets 21 and 21 at the end of an oil damper 20 as an attenuator, a plate 20 on the column beam frame side, brackets 21 and 21 and a plate 22. The oil damper 20 is coupled to the plate 22 side by fitting a pin 25 from a direction orthogonal to the holes 23 and 24 provided opposite to each other. In this case, a guide 26 having a hole 24 is provided in the plate 22, presser plates 27, 28 are provided above and below the brackets 21, 21, and the press plates 27, 28 are attached to the brackets 21, 21 via bolts 29, 30. By connecting, the pin 25 is prevented from coming off.
[0005]
In the oil damper mounting structure shown in FIG. 5, a hollow guide 26a is provided in the fume plate 22, and a spherical bearing 31 having a hole 24 is provided in the guide 26a so as to be swingable. The pin 25 is fitted to the pin. The other structure is the same as FIG.
[0006]
[Problems to be solved by the invention]
Although the conventional oil damper mounting structure shown in FIGS. 4 and 5 is not functionally defective, there is a slight gap between the outer periphery of the pin 27 and the holes 23 and 24 on the plate 22 side. A play occurs in the pin 25 itself. For this reason, when vibration due to an earthquake or the like occurs on the column beam frame side, if this vibration has a small amplitude, the vibration is not input to the oil damper 20 side and sufficient damping effect, that is, vibration control cannot be performed. There is.
[0007]
Therefore, an object of the present invention is to fit the pin into the hole of the bracket and the plate without looseness, and to tightly connect the bracket and the plate, for example, to reliably transmit the input such as vibration on the plate side to the oil damper side. And providing an oil damper mounting structure capable of sufficient damping effect.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the means of the present invention provides a bifurcated bracket consisting of a pair of upper and lower parts at the end of an oil damper, and inserts a plate on the mounting side between the brackets, Holes are provided opposite to each other, a hollow guide is provided in the hole of the plate, a spherical bearing provided with a hole in the guide is swingably provided, and a pin is provided in the hole of the plate and the hole of the spherical bearing. In the mounting structure of the oil damper that fits and couples the oil damper to the plate, the diameter-expandable cylindrical shape is formed with a tapered surface that is reduced in diameter upward in the hole of the spherical bearing and the hole of the bracket. Insert a spacer consisting of a sleeve, fit a pin with a tapered surface that is reduced in diameter toward the inside of the spacer, and arrange a pair of presser plates above and below the bracket. Board The presser plates are connected to the upper and lower brackets via bolts while abutting the upper end of the pacer and the lower presser plate abutting the lower end of the pin .
[0009]
In this case, it is preferable that the spacer is formed of a cylindrical sleeve having a slit and capable of expanding its diameter.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3.
[0011]
The present invention is suitable for use in, for example, mounting an oil damper installed on a column beam frame as shown in FIG. 3 along a diagonal direction.
[0012]
Structures such as high-rise buildings and high-rise towers are arranged with a large number of column members 1 and 1 standing in the vertical direction in the front and rear, left and right, and a large number of beam members 2 along the vertical direction between two adjacent column members 1 and 1. , 3 are constructed, and the two column members 1 and 1 and the two upper and lower column members 2 and 3 constitute a column beam frame 4 having a ramen structure that is continuous vertically.
[0013]
Attenuator 12 in which a brace 10 and an oil damper 20 as an attenuator are connected in series is disposed on a diagonal line in the single column beam frame 4, and both ends of the attenuator 12 are respectively connected to the column members 1, 1. And the beam members 2 and 3 are connected to each crossing portion via plates 22 and 22.
[0014]
The oil damper 20 includes a cylinder and a piston rod that is movably inserted into the cylinder via a piston. One end of the brace 10 is connected in series to the cylinder, and the lower end of the brace 10 is connected to the plate 22 by a spherical bearing and a pin 37. Are connected through etc. The oil damper 20 is provided with a bifurcated bracket 21, and the bracket 21 is connected to the plate 22 with a pin 37.
[0015]
The intersection of the column members 1, 1 and the beam members 2, 3 is provided on the intersection of the axis of the column members 1, 1 and the axis of the beam members 2, 3 or on an obliquely extended line of this intersection. For example, as in the embodiment shown in FIG. 3, horizontal plates 22, 22 are provided on the pillars 1, 1, and both ends of the attenuation device 12 arranged diagonally are coupled to the respective plates 22, 22. In addition, the both-end coupling position between the plates 22 and 22 and the damping device 11 may be set on the extended line of the intersection P between the axis of the column 1 and the axis of the beams 2 and 3.
[0016]
The oil damper 20 and the plate 22 are coupled by an attachment structure as shown in FIG.
[0017]
The oil damper 20 is provided with bifurcated brackets 21 and 21 at the end portions thereof in the same manner as in the prior art, and a hole 23 is formed at the center of the brackets 21 and 21.
[0018]
Between the upper and lower brackets 21, 21, a plate 22, which is a mounted side, is inserted and coupled to the plate 22 via a pin 37 and a spacer 38.
[0019]
A hollow guide 39 is coupled into the hole of the plate 22 by welding or the like, and a spherical bearing 41 is fitted into the hollow portion 40 of the guide 39 so as to be swingable.
[0020]
The spherical bearing 41 has a spherical surface on the outer periphery and a hole in the direction perpendicular to the plate 22 at the center.
[0021]
In the hole of the spherical bearing 41, spacers 38 and 38 made of a cylindrical sleeve capable of expanding diameter and having a tapered surface 38b formed on the inner periphery are inserted, and a tapered surface 37a is formed on the outer periphery inside the spacers 38 and 38. The pin 37 is fitted. As shown in FIG. 1, the tapered surface 38b of the spacer 38 is reduced in diameter upward, the tapered surface 37a of the pin 37 is also reduced in diameter upward, and both sides when the pin 37 is fitted upward from below. The spacers 38 and 38 are pressed against the inner peripheral side of the spherical bearing 41, so that no gap is formed by the spacers 38 and 38 between the outer periphery of the pin and the inner periphery of the spherical bearing 41. Prevents play.
[0022]
Presser plates 27 and 28 are disposed above and below the brackets 21 and 21, and these presser plates 27 and 28 are coupled to the brackets 21 and 21 via bolts 29 and 30. The presser plates 27 and 28 are connected to the pins 37. The spacer 38 is prevented from coming off. The spherical bearing 41 may not be provided, and the spacer 38 and the pin 37 may be directly fitted into the hole of the plate 22. As shown in FIG. 2, the spacer 38 forms a slot 38a. However, the spacer 38 can be used without the slot 38a. Similarly, the spacer 38 may have another structure as long as it eliminates the gap on the outer periphery of the pin 37.
[0023]
【The invention's effect】
According to the present invention, the following effects can be obtained.
[0024]
A spacer made of a cylindrical sleeve capable of expanding diameter is formed in the hole of the spherical bearing and the hole of the bracket, and the diameter of the sleeve is increased, and the diameter is reduced upward inside the spacer. Since the pin with the tapered surface is fitted, when the pin is fitted into the spacer, the spacer expands due to the wedge effect of the taper surface on the outer periphery of the pin and the taper surface on the inner periphery of the spacer. As a result, the gap between the pin and the spacer and between the spacer and the spherical bearing is eliminated by the wedge effect. It is transmitted to the damper side, and the input can be reliably attenuated.
Further, a pair of presser plates are arranged above and below the bracket, and the upper presser plate is brought into contact with the upper end of the spacer, and the lower presser plate is brought into contact with the lower end of the pin, and these presser plates are connected via bolts. Since the upper and lower brackets are connected to each other, each presser plate prevents the pin and spacer from coming off.
[Brief description of the drawings]
FIG. 1 is an enlarged cross-sectional view of an oil damper mounting structure according to an embodiment of the present invention.
FIG. 2 is a front view of a spacer.
FIG. 3 is a front view of an oil damper attached to a column beam frame.
FIG. 4 is a cross-sectional view of a conventional oil damper mounting structure.
FIG. 5 is a cross-sectional view of another conventional oil damper mounting structure.
[Explanation of symbols]
20 Oil damper 21 Bracket 22 Plate 23, 24 Hole 37 Pin 37a Tapered surface 38 Spacer 38a Slot 38b Tapered surface

Claims (2)

A bifurcated bracket consisting of a pair of upper and lower parts is provided at the end of the oil damper, a plate on the mounting side is inserted between the brackets, a hole is formed opposite to the bracket and the plate, and a hollow is formed in the hole of the plate. A spherical bearing having a hole in the guide is swingably provided, and a pin is fitted into the hole of the plate and the hole of the spherical bearing to couple the oil damper to the plate. In the mounting structure, a spacer made of an expandable cylindrical sleeve having a tapered surface that is reduced in diameter upward is inserted into the hole of the spherical bearing and the hole of the bracket, and the upper part is inserted inside the spacer. A pin having a tapered surface reduced in diameter is fitted, and a pair of presser plates are arranged above and below the bracket, the upper presser plate is in contact with the upper end of the spacer, and the lower presser plate is the above Mounting structure of the oil damper, characterized in that each coupled to the upper and lower bracket through a bolt these pressing plates while in contact with the lower end of the down.  2. The oil damper mounting structure according to claim 1, wherein the spacer is formed of a cylindrical sleeve having a slit and capable of expanding.

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