JP3222863B2 - Damping type vibration damping device for steel pipe columns - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damping type vibration damping device which is housed inside a steel pipe column such as a lighting column, a sign column or a signal column provided alongside a road or a railway.

[0002]

2. Description of the Related Art Generally, steel pipe pillars such as lighting poles, signposts, and signal poles provided alongside roads or railroads receive vibrations caused by Karman vortices caused by wind and vibrations caused by running of vehicles. In some cases, a vibration damping device is stored and provided inside to prevent this vibration.

[0003] Various types of such vibration damping devices have been proposed and put into practical use. For example, Shoko 61
In Japanese Patent No. 5378, a rod-shaped pendulum extending in the axial direction is disposed inside a steel pipe column, and one end of the pendulum is swingably supported around a support shaft, and a swing direction of an outer peripheral surface of the pendulum is set. An elastic member is provided on both sides, and when the steel tube column vibrates, the pendulum collides with the inner surface of the steel tube column via the elastic member to exhibit a vibration damping effect. In addition, real fairness 7
No. 9283 discloses that a large number of weight bodies are independently housed in a vessel rigidly connected to a steel pipe column so as to be able to collide with a vessel wall, and the above weight bodies collide with the vessel wall when the steel pipe column vibrates. One that exhibits a vibration damping effect is disclosed.

[0004]

The above-mentioned conventional vibration damping devices are all of the so-called collision type which exerts a vibration damping effect by collision of a rigid body such as a pendulum or a heavy body. In this collision type vibration damping device, an effective vibration damping effect is exhibited only when the steel pipe column, which is the object to be damped, vibrates to some extent and the steel pipe column or the vessel wall collides with the rigid body. However, there is a limit to the absorption of vibration energy due to collisions, and a sufficient effect can be obtained with respect to steady vibration excited by relatively weak external force such as wind response by Karman vortex. At present, a sufficient effect cannot be obtained for the accompanying transient vibration due to the time delay until the rigid body collides and the limit of the damping effect for a relatively large external force. There is also a problem of noise due to the collision of the rigid body.

On the other hand, as a general structure vibration damping device,
For example, as disclosed in Japanese Patent Application Laid-Open No. 62-46042, a pendulum having an upper end swingably supported around a support shaft and a weight provided at a lower end side, and a fixing part on the side of the pendulum and the structure. There is known a damping type that includes a damper provided between the damping members and exhibits a damping effect by a damping force generated by the damper. This damping type vibration damping device has a characteristic of exhibiting a vibration damping effect from the initial stage of the vibration of the object to be damped, and does not cause a problem of noise.

However, in the above-mentioned damping type vibration damping device, not only a damper having a certain size but also a pendulum having a longer length and a heavier weight are used in order to exert a large damping force. In other words, it needs to be increased.
Therefore, when storing this damping type vibration damping device inside a steel pipe column such as a lighting column or a sign column with a relatively narrow space,
It is necessary to appropriately arrange the components of the vibration damping device or to form them in an appropriate shape to make the whole vibration damping device compact.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned points, and has as its object to provide a damping type vibration damping device, as described above, which is particularly suitable for a steel tube column such as an illumination column or a sign column having a relatively small space. By storing each component appropriately or forming it into an appropriate shape when storing it inside, the whole vibration damping device is made compact, so that not only steady vibration due to Karman vortex etc., but also vehicle running The present invention is intended to provide a damping type vibration damping device for a steel pipe column which can exert a sufficient vibration damping effect even with transient vibration accompanying the above and does not cause a problem of noise and is effective in practice.

[0008]

In order to solve the above-mentioned problems, the invention according to claim 1 is provided by storing the inside of a steel pipe column such as a lighting column, a sign column or a signal column provided along a road or a railway. As a damping type vibration damping device to be equipped, an upper end is swingably supported around a support shaft, and a pendulum provided with a weight at a lower end side is provided between the pendulum and a fixed portion on a steel pipe column side. And a damper. The weight is formed in an inverted trapezoidal shape in plan view so that the width in the swinging direction of the pendulum becomes gradually smaller downward, and has a predetermined thickness.
It has a configuration having only Further, an arm is provided at an upper end of the pendulum, which is substantially perpendicular to the axial direction of the pendulum and protrudes in the swinging direction of the pendulum, and one end of the damper is connected to a tip of the arm, and the damper is connected to the support shaft. It is configured to be arranged along the vertical direction inside the steel pipe column at the top.

In this configuration, the weight of the pendulum gradually decreases as the width of the pendulum in the swinging direction moves downward, that is, as the distance from the swing center increases.
The weight can be made as large as possible and the length of the pendulum can be increased while avoiding interference between the weight and the inner surface of the steel pipe column when the pendulum swings. Also,
The size of the damper is limited due to the relationship between the internal space of the steel pipe column and the position of the pendulum, since the damper is arranged vertically above the shaft, which is the center of swinging of the pendulum, inside the steel pipe column. It will not be done. From these facts, it is possible to generate a damping force of an appropriate magnitude when the steel pipe column vibrates, and to exert a sufficient vibration damping effect.

[0010] The invention according to claim 1 is an invention of the above damper.
The preferred form is also provided. That is, Dan
Par with a cylindrical cylinder with one end open
Has a through hole in the axial direction that is slidably fitted into the
To be removed and removable through the through hole of this piston
Orifice adjustment material with orifice mounted on
Therefore, it is constituted. In this configuration, the pendulum when the steel tube column vibrates
The piston of the damper fits in the cylinder with the swing of
And slide it along with it.
Air enters and exits through the piston through hole and
Damping due to air resistance when passing through the orifice of the air conditioner
Force or damping force is generated. In this case, orifice adjustment
Adjusting the magnitude of the damping force appropriately only by replacing the material
Can be.

[0011] The invention according to claim 1 is an invention of a vibration damping device.
In order for the natural frequency to match the natural frequency of the steel
It also provides a preferable form when the essential spring is provided
It is. That is, move the arm from the upper end of the pendulum
A pair is provided symmetrically with respect to the support shaft, and the end of each arm
A pair of springs that apply spring force to the pendulum side
It is arranged along the vertical direction inside the pipe column, and one of them
The spring is arranged in the cylinder of the damper.
In this configuration, each of the pair of springs is connected via an arm.
By applying spring force symmetrically to the pendulum,
Without affecting the swing of the pendulum, and without affecting the spring and other
The natural frequency of the vibration damper can be increased without causing interference with members.
It can be matched to the natural frequency of the steel pipe column.

The inventions according to claims 2 and 3 both provide a work-friendly structure when the damping type vibration damping device is housed inside a steel pipe column and installed. That is, the invention according to claim 2 has a configuration in which an opening for mounting a vibration damping device is provided in the steel pipe column, and a bracket for supporting the support shaft and the damper is mounted on an inner surface of a lid member that closes the opening. In this configuration, since each component of the vibration damping device is attached to the lid member via the bracket, the storage device of the vibration damping device in the steel pipe column can be easily installed simply by attaching the lid member to the opening. Can be.

According to a third aspect of the present invention, an opening for mounting a vibration damping device is provided in a part of the outer peripheral surface of the steel pipe column, and the support shaft and the damper are supported on a side facing the opening. A bracket is attached and the opening is closed by a lid member. With this configuration, the bracket that supports each component of the vibration damping device can be easily attached to the inner surface of the steel pipe column through the opening. In addition, at the time of maintenance of the vibration damping device, the cover member can be easily removed to quickly perform the operation.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show one embodiment of the present invention .
1 shows an overall configuration of a damping type vibration damping device A according to an embodiment. The vibration damping device A is installed by being stored inside a steel pipe column 1 such as a lighting column, a sign column, or a signal column provided alongside a road or a railroad. The height position is set at a height position at which the steel tube column 1 vibrates greatly, for example, at the uppermost portion in the primary vibration of the steel tube column 1, and at the middle portion in the secondary vibration of the steel tube column 1.

The steel pipe column 1 is provided with a rectangular vibration damping device mounting opening 2 which is long in the height direction, and the opening 2 is closed by a lid member 3. As shown in detail in FIGS. 4 to 7, the lid member 3 is a thin plate having a rectangular shape slightly larger than the opening 2 in plan view and an arc-shaped cross section. 3, a mounting bracket 4 for mounting main components of the vibration damping device A on the upper part.
And a protection plate 5 protruding in the horizontal direction is fixed to the lower end. The mounting bracket 4 includes an upper horizontal portion 4a protruding in the horizontal direction similarly to the protection plate 5, a pair of left and right side walls 4b, 4b hanging right and left below the upper horizontal portion 4a, and both side wall portions 4b, 4b. It has an intermediate horizontal portion 4c and a lower horizontal portion 4d connecting the 4b with each other at the intermediate position and the lower end position, respectively.

On the inner surface of the lid member 3, a rectangular frame-shaped packing 6 or the like is superimposed along four sides thereof, and a bolt hole 7 penetrating the lid member 3 and the packing 6 or the like is provided at an intermediate position of each side. It is provided in. Then, the inner surface side of the lid member 3 is applied to the periphery of the opening 2 of the steel pipe column 1 through a packing 6 or the like, and a bolt (not shown) is inserted into each bolt hole 7.
Is inserted and tightened, so that the lid member 3 is closed and attached to the steel pipe column 1 in a state where the opening 2 is sealed.

The vibration damping device A includes, as its main components, a pendulum 10, a damper 20, a pair of coil springs 51,
52. As shown in detail in FIG. 8, the pendulum 10 includes a screw rod 11 as a pendulum main body and the screw rod 1.
1 in the horizontal direction with an intermediate part attached to the upper end of the screw rod 1
The screw holder 11 includes a bearing holding member 12 extending in a direction orthogonal to the axial direction and a weight 13 provided from an intermediate portion of the screw rod 11 to a lower end thereof. The bearing holding member 12 is
It has shaft through holes 14a, 14b, 14c at an intermediate portion and both ends located on the axis of the screw rod 11, respectively, and holds ball bearings 15, 15, 15 around the shaft through holes 14a to 14c, respectively. are doing. A shaft 1 is inserted into a shaft through hole 14a at an intermediate portion of the bearing holding member 12.
6 are penetrated, and both end portions of the support shaft 16 are inserted into and supported by support holes 41 provided below each side wall portion 4b of the mounting bracket 4, respectively. Therefore, the pendulum 10 is swingably supported around the support shaft 16. still,
The bearing holding member 12 is a pair of arms protruding symmetrically from the upper end of the pendulum 10 according to the first aspect of the present invention at substantially right angles to the axial direction of the pendulum 10 and sandwiching the support shaft 16 in the swinging direction of the pendulum 10. The left and right ends of the bearing holding member 12 correspond to the distal ends of the arms.

The weight 13 is made of a steel material having an inverted trapezoidal shape and a predetermined thickness in a plan view, and a center hole 17 is provided on a center line thereof. The weight 13 is attached to the screw rod 11 by inserting the screw rod 11 into the center hole 17 and fixing the weight 13 with two upper and lower nuts 18 a and 18 b screwed to the screw rod 11. The weight 13 is formed by connecting the inverted trapezoidal plane to the screw rod 1.
The weight 13 is fixed to the screw rod 11 in a state of being aligned with the swinging surface of the pendulum 10, and the width of the weight 13 in the swinging direction of the pendulum 10 is gradually reduced toward the lower side.

The damper 20 is disposed above the support shaft 16 in the vertical direction in the steel tube column 1. The damper 20 includes a cylindrical cylinder 21 having one end opening downward, and a piston 22 slidably fitted in the cylinder 21. The cylinder 21
As shown in detail in FIG. 9, the upper end surface 21 on the side opposite to the opening side
a, and a connecting pin 24 penetrates through a connecting hole 23 provided in the connecting portion 21b. Both ends of the connecting pin 24 Support hole 4 provided in the upper part of side wall 4b
2 and supported. A spring holding portion 25 swelling inward is formed on the upper end surface portion 22a of the cylinder 21, and the inner peripheral surface of the cylinder 21 has a contact surface with the piston 22 in a region where the upper end of the piston 22 slides. A wide annular recess 26 for reducing contact resistance is formed.

On the other hand, the piston 22 is, as shown in detail in FIG.
2a has a pair of connecting portions 22b, 22b that are suspended at a predetermined distance from each other on the lower surface of the bearing holding member 12 between the pair of connecting portions 22b, 22b. The piston 22 is connected to one end of the bearing holding member 12 as the tip of the arm portion of the pendulum 10 by inserting the connecting pin 28 into the connecting hole 27 provided in the bearing holding member 12 and the shaft through hole 14 b of the bearing holding member 12. A spring holding portion 29 swelling upward is formed on the upper end surface of the piston main body 22a, and a through hole 30 penetrating in the axial direction including the spring holding portion 29 on the center line of the piston main body 22a. Is provided. Orifice adjusting members 31, 31 are detachably mounted near the upper and lower two openings of the through hole 30, respectively.

The orifice adjusting member 31 has a male screw 31 on its outer peripheral surface as shown in detail in FIGS.
a is one in which a hexagonal hole 31b for fastening is formed on one end surface, and is attached by screwing a male screw 31a with the hexagonal hole 31b side outside and a female screw formed near the opening of the through hole 30. Have been. The orifice adjusting member 31 has a predetermined hole diameter (0. 0. 0) passing through the center of the hexagonal hole 31b.
An orifice 32 of 40 to 4.00 mm) is formed.

A coil spring 51 is disposed in the cylinder 21 of the damper 20.
Is positioned along the up-down direction in the cylinder 21 with one end being positioned and held by the spring holding portion 25 of the upper end surface portion 21a of the cylinder 21 and the other end being held by the spring holding portion 29 of the piston 22. It is arranged along the up-down direction, and the spring force is applied to one end (the left end in the figure) of the bearing holding member 12 via the piston 22 of the damper 20.

The other coil spring 52, which forms a pair with the coil spring 51, applies its spring force to the other end (the right end in the figure) of the bearing holding member 12 as the tip of the arm of the pendulum 10. It is provided via a metal fitting 53. That is, the spring fixing bracket 53 is the same as that shown in FIG.
As shown in detail in FIG. 3, a pair of connecting portions 53 that hang down at a predetermined distance from each other on the lower surface of the circular spring seat plate 53a.
b, 53b, and the pair of connecting portions 53b, 5
By inserting the connecting pin 55 into the connecting hole 54 provided in each connecting portion 53b and the shaft through hole 14c of the bearing holding member 12 with the other end of the bearing holding member 12 interposed between the bearing holding members 3b, the spring fixing metal fitting 53 becomes a bearing. It is connected to the other end of the holding member 12. A spring holding portion 56 bulging upward is formed on the upper surface of the spring seat plate 53a.
A spring holding portion 57 swelling downward is formed on the intermediate horizontal portion 4c of the mounting bracket 4, and one end of the coil spring 52 is connected to the spring holding portion 56 of the spring seat plate 53a, and the other end is connected to the mounting bracket. It is arranged along the up-down direction inside the steel pipe column 1 in a state where it is positioned and held by the spring holding portion 57 of the intermediate horizontal portion 4c.

In FIG. 2, reference numeral 8 denotes a cable routed in the steel pipe column 1. This cable 8 interferes with the vibration control apparatus A at the storage location of the vibration control apparatus A in the steel pipe column 1. In order to avoid this, wiring is carried out between the side wall 4b of the mounting bracket 4 and the inner surface of the steel pipe column 1 in the vertical direction.

Next, the operation of the above damping type vibration damping device A will be described. When the steel pipe column 1 which is a vibration-suppressed object is vibrated, the pendulum 10 is shown by a solid line in FIG. It swings around the support shaft 16 from the neutral state. Then, the damper 20 has its piston 22
Reciprocate inside the cylinder 21 and the air in the cylinder 21
The damping force is generated by the flow resistance when passing through the orifice 32 of the orifice adjusting member 31 attached to the through-hole 30 through the through-hole 30 of the second through-hole 30, thereby exhibiting a vibration damping effect against vibration. Is done. Since the damping force of the damper 20 is generated simultaneously with the swing of the pendulum 10 from the initial stage of the vibration of the steel pipe column 1, not only the steady vibration due to the Karman vortex of the steel pipe column 1 but also the transient vibration accompanying the vehicle running. Sufficient vibration damping effect can be exerted even for severe vibration.

In addition, in the above-described damping type vibration damping device A, the weight 13 of the pendulum 10 is gradually reduced as the width of the pendulum 10 in the swinging direction is gradually reduced. The weight 13 can be made as large as possible and the length of the pendulum 10 can be increased while avoiding interference between the weight 13 and the inner surface of the steel pipe column 1 at the time. In addition, since the damper 20 is disposed along the up-down direction in the steel pipe column 1 above the support shaft 16 which is the swing center of the pendulum 10, the damper 20 is located between the inner space of the steel pipe column 1 and the arrangement position of the pendulum 10. The size of the damper 20 is not limited by the relationship. From these facts, it is possible to generate an appropriate amount of damping force when the steel pipe column 1 vibrates, and it is possible to sufficiently exhibit the vibration damping effect.

Moreover, the damping force of the damper 20 is controlled by the orifice adjusting member 3 attached to the through hole 30 of the piston 22.
1 can be easily adjusted simply by replacing the steel pipe column 1, so that the vibration damping effect can be more effectively exhibited in response to the vibration of the steel pipe column 1.

Furthermore, in the above embodiment , when the vibration damping device A is provided with the coil springs 51 and 52 so that the natural frequency thereof matches the natural frequency of the steel pipe column 1, the pendulum 10 is provided at the upper end side thereof. At a substantially right angle to the axial direction of the support shaft 16
An intermediate portion of the bearing holding member 12 is mounted so as to form a pair of arms protruding symmetrically with respect to the pair, and a pair of coil springs 51 and 52 for applying spring force to both ends of the bearing holding member 12 are provided. The arrangement of the vibration damping device A without affecting the swing of the pendulum 10 and without causing interference between the coil springs 51 and 52 and other members by being arranged along the vertical direction in the steel pipe column 1. The natural frequency can be made to match the natural frequency of the steel pipe column 1.

In addition, in the above embodiment , the steel pipe column 1 is provided with the opening 2 for mounting the vibration damping device, and the respective components of the vibration damping device A are mounted on the inner surface of the lid member 3 which closes the opening 2. Therefore, at the work site where the damping device A is stored in the steel pipe column 1, the storing operation can be easily performed simply by attaching the lid member 3 to which the respective components of the damping device A have been attached in advance to the opening 2. And work efficiency can be improved.

[0030]

[0031]

[0032]

[0033]

The present invention is not limited to the above embodiment.
Instead, it includes various other forms.
For example, in the above embodiment, the support shaft 16 or the connecting pin 2 of the bearing holding member 12 mounted on the upper end of the pendulum 10 is used.
The three axial through-holes 14a to 14 through which 8, 55 penetrate
4c, ball bearings 15 are provided around each
Each member can be easily rotated relatively around the support shaft 16 or the connection pins 28 and 55 even when a load is applied to the support shaft 16 and the connection pins 28 and 55. Alternatively, the bearing holding member 12 and the threaded rod 11 as the pendulum main body may be integrally formed.

Further , in the above embodiment , the steel pipe column 1 is provided with the opening 2 for mounting the vibration damping device, and the respective components of the vibration damping device A are mounted on the inner surface of the lid member 3 which closes the opening 2. However, the present invention provides a vibration damping device mounting opening in a part of the outer peripheral surface of the steel pipe column, and a bracket that supports each component of the vibration damping device is mounted on a side facing the opening, and The portion may be closed by a lid member.
In this case, the bracket supporting each component of the vibration damping device can be easily attached to the inner surface of the steel pipe column through the opening, and the lid member can be easily removed during maintenance of the vibration damping device to speed up work. Can be done.

[0036]

As described above, according to the damping type vibration damping device for steel pipe columns of the present invention, the weight is reduced as much as possible while avoiding the interference between the weight and the inner surface of the steel pipe column when the pendulum swings. The size of the damper can be increased, and the length of the pendulum can be increased.The size of the damper is not limited by the internal space of the steel pipe column or the position of the pendulum, so the vibration of the steel pipe column An appropriate damping force can be generated at an early stage, and a sufficient vibration damping effect can be exhibited. In addition, it does not cause a noise problem or the like, which is very advantageous in realizing the implementation.

In addition, it is one component of the damper.
Damper is generated just by replacing the orifice adjustment material
Since the magnitude of the damping force can be adjusted as appropriate,
The vibration effect can be further effectively improved.

Further, each of the arm portions is formed by a pair of springs.
To apply a spring force symmetrically to the pendulum via
It does not affect the swing of the pendulum,
Vibration of the vibration damping device without causing interference between the
The frequency can be matched to the natural frequency of the steel column
Thus, the vibration damping effect can be more effectively increased.

In particular, according to the second aspect of the present invention, since each component member of the vibration damping device is attached to the lid member via the bracket, the vibration damping into the steel pipe column can be achieved simply by attaching the lid member to the opening. Equipment storage can be easily performed,
There is an effect that the workability can be improved.

According to the third aspect of the present invention, the bracket for holding each component of the vibration damping device can be easily attached to the inner surface of the steel pipe column through the opening, and the lid member is attached during maintenance of the vibration damping device. There is also an effect that the work can be quickly performed by easily removing the cover.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing the entire configuration of a damping type vibration damping device according to an embodiment of the present invention .

FIG. 2 is an enlarged cross-sectional view taken along line KK of FIG.

FIG. 3 is an enlarged sectional view taken along line LL of FIG. 1;

4A and 4B show a configuration of a lid member, wherein FIG. 4A is a front view as viewed from the inside, and FIG. 4B is a right side view.

FIG. 5 is a sectional view taken along line MM in FIG. 4;

FIG. 6 is a sectional view taken along line NN of FIG. 4;

FIG. 7 is a view as seen from an X direction in FIG. 4;

8A and 8B show a configuration of a pendulum, wherein FIG. 8A is a front view as viewed from a direction orthogonal to the swing direction of the pendulum, and FIG. 8B is a side view.

9A and 9B show a cylinder of the damper, wherein FIG. 9A is a longitudinal sectional view as seen from one direction, and FIG. 9B is a longitudinal sectional view as seen from a direction orthogonal thereto.

10A and 10B show a piston of the damper, wherein FIG. 10A is a front view and FIG. 10B is a side view.

FIG. 11 is an enlarged plan view of an orifice adjusting member.

FIG. 12 is a sectional view taken along line YY of FIG. 11;

FIG. 13 shows a spring fixing bracket, wherein (a) is a front view,
(B) is a side view.

[Description of Signs ] A Damping type vibration damping device 1 steel pipe column 2 opening for vibration damping device attachment 3 lid member 4 mounting bracket 10 pendulum 12 bearing holding member (arm portion) 13 weight 16 support shaft 20 damper 21 cylinder 22 piston 30 piston Through hole 31 Orifice adjusting material 32 Orifice 51, 52 Coil spring

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-62-2035 (JP, A) JP-A-58-571 (JP, A) JP-A-5-170066 (JP, A) JP-A 8- 100546 (JP, A) Japanese Utility Model Hei 3-119018 (JP, U) Japanese Utility Model Sho 59-24413 (JP, U) Japanese Utility Model Utility Model 55-114912 (JP, U) (58) Fields surveyed (Int. ⁷ , DB name) F16F 15/02-15/08 F16F 9/00-9/54 F21S 1/10 E04H 9/02 E01D 1/00

Claims (3)

(57) [Claims] 1. A damping type vibration damping device installed and housed inside a steel pipe column such as a lighting column, a sign column or a signal column provided alongside a road or a railway, the upper end of which is oscillated about a support shaft. A pendulum supported so as to be capable of being provided with a weight at the lower end side, and a damper provided between the pendulum and a fixed portion on the steel pipe column side.
Is formed in an inverted trapezoidal shape when viewed in plan so that the width of the pendulum in the swinging direction gradually decreases
The pendulum has an arm portion that is provided at an upper end of the pendulum at a substantially right angle to an axial direction of the pendulum and protrudes in a swinging direction of the pendulum. Is connected, and the damper is
The damper is disposed along the vertical direction in the steel pipe column above the support shaft, and the damper includes a cylindrical cylinder having one end opened,
The cylinder penetrates axially and is slidably fitted into this cylinder.
A piston with a through hole and a through hole
Orifice style with detachable orifice
The arm part is symmetrical with the support shaft interposed from the upper end of the pendulum.
A pair of pendulums are provided from the tip of each arm.
A pair of springs that apply spring force to each side
Are arranged along the vertical direction, one of which is
A damping type vibration damping device for steel pipe columns, which is disposed in a cylinder of the damper . 2. The steel pipe column has an opening for mounting a vibration damping device.
The support shaft is provided on an inner surface of a lid member for closing the opening.
And a bracket that supports the damper
Damping type vibration damping device of tubular columns according to claim 1, wherein that. 3. The steel pipe column has a partly restricted outer peripheral surface.
A vibration device mounting opening is provided and
A block supporting the support shaft and the damper on the side facing the mouth.
A racket is attached, the above opening is in the lid member
The damping type vibration damping device for a steel pipe column according to claim 1, which is more closed .