JP2799024B2 - Viscous damper - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a viscous damper, and more particularly to a viscous damper configured to attenuate vibration by viscous resistance of a viscous fluid having a high viscosity.

2. Description of the Related Art For example, in a building such as a building or a structure having a relatively heavy weight, construction using a seismic isolation method is performed to protect the building and the structure from an earthquake. In the seismic isolation method, the whole is isolated from the ground by a seismic isolation device provided between the ground and a building or structure. As this type of seismic isolation device, for example, a disk-shaped metal plate whose surface is coated with rubber and a rubber plate formed in a disk shape are alternately stacked and held so that they are not separated from each other. In some cases, a plurality of laminated rubber members are provided between the ground and a building, and a viscous damper is provided between the two.

Therefore, when the seismic isolation device is applied, when an earthquake occurs, the vibration from the ground is elastically attenuated by the shearing force of the laminated rubber member and is damped by the operation of the viscous damper. This type of viscous damper is, for example, provided with a movable disk in a cylindrical casing and filled with a high-viscosity fluid, and is configured to attenuate vibration by viscous resistance applied to the movable disk in the casing. .

Problems to be Solved by the Invention However, in order to further increase the viscous resistance in the viscous damper, when a plurality of movable disks are movably provided between a plurality of fixed plates fixed to the casing, each movable disk is Due to the small gap between the fixed plate and the high viscosity of the viscous fluid, air tends to remain between the movable disk and the fixed plate when filling the viscous fluid into the casing, making it difficult to remove this residual air. There is. Further, if air is mixed into the viscous fluid, the viscous resistance acting on the movable disk fluctuates, and a stable damping effect cannot be obtained.

Therefore, an object of the present invention is to provide a viscous damper that solves the above-mentioned problems.

Means for Solving the Problems The present invention provides a casing filled with a high-viscosity viscous fluid, a plurality of fixing plates fixed in the casing, and interposed between the plurality of fixing plates and moved in the casing. In a viscous damper comprising a freely movable plate and a viscous damper, each of the plurality of fixed plates and the movable plate is provided so as to be separable one by one, and assembled into a casing with the movable plate interposed between the plurality of fixed plates. When attaching, first, one fixed plate is attached to the inside of the casing from the upper opening of the casing, and the amount of viscous fluid that fills the gap between the one fixed plate and the movable plate attached to the upper portion is applied to the casing. After pouring from the upper opening, the movable plate is inserted into the casing through the upper opening of the casing and assembled on the upper part of one fixed plate, and then the movable plate and the other fixed plate assembled on this upper part Gap with After the amount of the viscous fluid is filled is injected from the upper opening of the casing,
The other fixed plate is configured to be mounted on an upper part of a movable plate mounted in the casing.

When assembling a casing with a movable plate interposed between a plurality of fixed plates, first, one fixed plate is assembled inside the casing through an upper opening of the casing, and the one fixed plate is assembled to the upper portion of the casing. After injecting an amount of viscous fluid into the gap between the movable plate and the upper opening of the casing, the movable plate is inserted into the casing through the upper opening of the casing and assembled on the upper portion of one fixed plate. Then, after injecting an amount of viscous fluid into the gap between the movable plate and another fixed plate attached to this upper portion from the upper opening of the casing,
The other fixed plate is mounted on the movable plate mounted in the casing. In this way, the fixed plate and the movable plate are sequentially assembled by filling the viscous fluid between the plurality of movable plates so that air does not enter the gap between the movable plate and the movable plate.

Embodiment FIGS. 1 and 2 show an embodiment of a viscous damper according to the present invention.

In both figures, a viscous damper 1 is composed of a casing 4 in which a cylindrical outer cylinder 3 is fixed on a substantially flat base 2 and a plurality (three in this embodiment) fixed inside the casing 4. plates 5 ₁ and 5 _3, more becomes movable disc 6 _1, 6 ₂ of the plurality which is provided so as to be interposed between the fixed plate 5 ₁ to 5 ₃ (two in this embodiment), casing 4 Is filled with a viscous fluid 7 having a high viscosity. 8 is a mounting screw rod 8 which stands vertically from the base 2
In, it is inserted through the fixed plate 5 ₁ to 5 ₃ holes 91 _to 93 ₃ bored in the vicinity of the outer periphery of the. Further, the interval of the fixed plate 5 ₁ to 5 ₃ is determined by the cylindrical spacer 10 to be fitted to the mounting screw rod 8. The first fixing plate 5 ₁ located on the lower side is formed in a disk shape, a plurality of holes 9 ₁ is provided with the mounting screw rod 8 is inserted into the outer periphery near the second, the third fixing plate 5 _2, 5 ₃ the outer diameter is the same diameter first fixing plate 5 ₁ and are formed in different annular inner diameters.

The first movable disc 6 ₁ first fixing plate 5 ₁ and the second fixing plate 5 ₂
And the second movable disk 6 ₂
It is assembled so as to be interposed between the second fixing plate 5, _second and third fixed plate _3.

Below the center hole 6 ₁ -a movable disk ₆₁ is fixed to the shaft 11 is erected. Further, the upper center hole of the movable disc 6 ₂
Hollow shaft 12 is fixed to the 6 ₂ -a. The hollow shaft 12 is in contact placed on the flange portion 11a of the shaft 11, thereby the first and second movable disc 6 _1, 6 ₂ of the interval is determined. The shaft 11 and the hollow shaft 1
The shaft 2 and the shaft 2 are integrally connected to the shaft 2 by bolts 14 and 15 screwed to the shaft 11 and the hollow shaft 12 via a connecting member 13.

An annular bracket 16 is fixed to the outer periphery of the hollow shaft 12, and an object (not shown) is mounted on the bracket 16. For example, if an earthquake occurs, the mounting object is moved in the horizontal direction together with the movable disc ₆₁ and 62 _2. At that time, movable disk 6
_1, 6 ₂ receives a resistance force of the viscous fluid 7 to move between the fixed plate 5 ₁ to 5 _3, vibration in the horizontal direction is attenuated.

A lid 17 is attached to the outer periphery of the hollow shaft 12 and closes an upper opening of the casing 4. A cover 18 is provided between the periphery of the lid 17 and the outer cylinder 3 of the casing 4 to seal the space between the lid 17 and the casing 4. Thus, 19 it is prevented that dust or the like into the casing 4 from entering the adjustment rod, as shown in FIG. 3, the lower side of the movable disc 6 ₁
A male screw 19a which screwed into the screw holes 6 ₁ -b a tool engaging surface 19b
And a male screw 19a for removing a reverse screw and a male screw 19c for removing a reverse screw. The adjusting rod 19 the upper side of the movable disc 6 ₂ as shown in FIG. 4
Screwed into drilled holes 6 ₂ -b lower movable disc ₆₁ of the screw holes 6 ₁ -a than the. Then, the tip of the male screw 19a is in contact with the fixed plate 5 _1, the fixed plate 5 ₁ to 5 ₃ and the movable plate 6 _and 62 by threaded amount for the screw holes 6 ₁ -b during assembly which will be described later The gap is adjusted. Incidentally, in the above movable disc ₆₁ has a plurality of adjustment rod 19 is screwed at predetermined intervals, adjusting each adjusting rod 19 in the same way.

Reference numeral 20 denotes an electric heater, which is attached to the outer periphery of the outer cylinder 3 of the casing 4. The periphery of the heater 20 is covered with a protective cover 21 made of aluminum cloth to prevent fire, and the inner surface of the protective cover 21 is filled with a heat insulating material 22. At the four corners of the base 2, as shown in FIGS. 2 and 5, a support plate 26 holding the outer cylinder 3 is fixed so as to avoid the protective cover 21.

23 and 24 are thermocouples for detecting the temperature of the viscous fluid 7, and are connected to the control device 25. The controller 25 energizes the heater 20 in accordance with the temperature detected by the thermocouples 23 and 24. For example, when the temperature is low, the viscosity of the viscous fluid increases and the viscous resistance increases. Is kept at a constant temperature. As a result, the viscous fluid 7 does not increase in viscous resistance even when the temperature is low, and generates a stable viscous resistance regardless of a change in temperature. Therefore, the viscous damper 1 can well attenuate the vibration even when the temperature is low.

Since the thermocouples 23 and 24 are independently connected to the control device 25, even if one pair fails, the other can be backed up. In summer, when the temperature rises, the viscosity of the viscous fluid 7 decreases and the viscous resistance decreases. Therefore, the control device 25 activates a cool air generator (not shown) to apply cooling air to the housing 4 to reduce the viscous resistance. You may make it raise.

Here, a description will be given of assembling the viscous damper 1 having the above configuration.

Sixth, as shown, the first fixing plate 5 ₁ the amount of viscous fluid filled in the gap between the base 2 and the fixed plate 5 ₁ before assembling into the housing 4 7 located first bottom side Is injected from the upper opening 4a of the housing 4. Then, the first fixing plate 5 ₁
Is placed on the protrusion 2a of the base 2 through the upper opening 4a. The first fixing plate 5 ₁ circumferential portion formed in pore 9 ₁ to a mounting screw rod 8 is positioned by being inserted at the same time.

Next, the first fixing plate 5 ₁ and the amount of viscous fluid filled in the first gap between the movable disc ₆₁ is injected from the upper opening 4a before assembling the movable disc 6 _1. And a movable disk integral with the shaft 11
6 ₁ is placed on the first upper fixing plate 5 _1. At this time, the movable disc ₆₁ is the gap between the fixed plate 5 ₁ is determined by the amount of protrusion of the adjustment rod 19 which is screwed into the screw holes 6 ₁ -b.

Next, the spacer 10 is inserted into the mounting screw rod 8, it is placed on the first upper fixing plate 5 _1. Then, the first movable disc ₆₁ and the second fixing plate 5 ₂ The amount of viscous fluid 7 is filled in the gap between is injected. At this time the upper end of the spacer 10 is in the eyes Yasu injection volume of the viscous fluid 7, followed by a second fixing plate 5 ₂ top opening
Casing so as to face the upper surface of the movable disc 6 ₁ from 4a 4
Is inserted within, is placed on the spacer 10 with mounting screw rod 8 into the hole 9 ₂ drilled in the peripheral edge portion is inserted.

Then, the amount of viscous fluid 7 is filled in the second gap of the fixed plate 5 ₂ and the second movable disc ₆₁ is injected from the upper opening 4a. Then, assembled as hollow shaft 12 and integrally movable disc 6 ₂ faces the second fixed plate 5 ₂ and the first movable disc 6 _1. At this time, the hollow shaft 12 is fitted with the shaft 11, and the stepped portion 1 of the through hole 12a is formed.
2b is placed on the flange portion 11a of the shaft 11, also the adjustment rod 19 which is screwed in the movable disc ₆₁ is hole 6 ₂ bored in the second circumferential portion of the movable disc 6 ₂ -Insert relative to b. And the first
As shown in the figure, the shaft 11 and the hollow shaft 12 are integrally fixed via a coupling member 13.

Next, the spacer 10 is inserted into the mounting screw rod 8 is placed on the second fixing plate 5 _2. And the amount of viscous fluid 7 in which the second movable disc ₆₁ is filled in the gap between the second fixing plate ₃ is injected. At this time, the upper end of the spacer 10 serves as a reference for the injection amount of the viscous fluid 7. Subsequently, a third fixed plate ₃ an upper opening
4a from being inserted into the movable disc 6 ₂ and the second fixed plate 5 ₂ casing 4 so as to face the, hole 9 ₃ drilled in the peripheral portion
The mounting screw rod 8 is inserted through and is placed on the spacer 10.

Then, fixing each fixing plate 5 ₁ to 5 ₃ by tightening the nut 27 on the mounting screw rod 8. In addition, since the movable disc 6 ₁ and 6 ₂ are assembled integrally, movable discs 6 _1, 6 ₂ and the fixing plate 5 _1-5
The gap with ₃ can be adjusted by changing the screwing amount of the adjusting rod 19 described above.

Thus the fixed plate and the fixed plate from the amount of viscous fluid filled in the gap between the movable disc are injected 5 ₁ to 5 _3, the movable disc
Since the pieces 6 ₁ and 6 ₂ are assembled one by one, air does not enter the viscous fluid 7 when the high-viscosity fluid 7 is filled in each gap. Therefore, a stable viscous resistance can be obtained in the viscous damper 1 after assembly.

Furthermore, the adjusting rod 19 also functions as a contact with the stopper on the inner periphery of the fixed plate 5 ₂ when the movable disc 6 _1, 6 ₂ moves horizontally.

In the above embodiment, the annular fixed plate and the circular movable disk are alternately combined. However, the shapes of the fixed plate and the movable plate are not limited to this.

Effect of the Invention As described above, the viscous damper according to the present invention is configured to inject an amount of viscous fluid to be filled into the gap between the fixed plate and the movable plate and to superimpose the fixed plate or the movable plate one by one.
Air does not mix with the viscous fluid filled in the gap between the plurality of fixed plates and the movable plate, so that the viscous resistance acting on the movable plate is prevented from fluctuating due to air mixing, and a stable viscous resistance is obtained. It has features such as being able to be.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of one embodiment of a viscous damper according to the present invention, FIG. 2 is a plan view of the viscous damper, FIG. 3 is a side view of an adjusting rod, and FIG. FIG. 5 is a side view showing a heater and a support plate, and FIG. 6 is a longitudinal sectional view for explaining a procedure of assembling a viscous damper. 1 ... Viscous damper, 2 ... Base, 3 ... Outer cylinder, 4 ...
Casing, 5 _{1 to} 5 ₃ ... fixed plate, 6 ₁ , 6 ₂ ... movable disk,
7: Viscous fluid, 8: Mounting screw rod, 10: Spacer,
11 ... shaft, 12 ... hollow shaft, 13 ... connecting member, 16 ... bracket, 19 ... adjustment rod, 20 ... heater, 21 ... protective cover, 23, 24 ... thermocouple.

Claims (1)

(57) [Claims] 1. A casing filled with a high-viscosity viscous fluid, a plurality of fixed plates fixed in the casing, and interposed between the plurality of fixed plates and movably disposed in the casing. In a viscous damper comprising a movable plate, each of the plurality of fixed plates and the movable plate is provided so as to be separable one by one. When assembling the casing with the movable plate interposed between the plurality of fixed plates, first, After the fixed plate is assembled from the upper opening of the casing into the interior of the casing, the amount of viscous fluid that fills the gap between the one fixed plate and the movable plate attached to the upper portion is injected from the upper opening of the casing. The movable plate is inserted into the casing through the upper opening of the casing and assembled on the upper portion of one fixed plate, and then filled in the gap between the movable plate and another fixed plate assembled on the upper portion. Volume of viscous fluid Is injected from an upper opening of the casing, and then the other fixed plate can be mounted on an upper portion of a movable plate mounted in the casing.