JP3341030B2 - Three-dimensional seismic isolation device for seismic isolation floor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a computer and a so-called office automation device (hereinafter referred to as OA device) which is susceptible to horizontal and vertical vibrations. The present invention relates to a three-dimensional seismic isolation device used for the purpose of suppressing and mitigating swaying as much as possible.

[0002]

2. Description of the Related Art Japanese Patent Publication No. 4-154 discloses a floor seismic isolation device for suppressing horizontal vibration of a seismic isolation floor, and is well known. Japanese Patent Application Laid-Open No. 62-86266 describes a vertical seismic isolation device that suppresses vertical vibration of a seismic isolation floor, and is well known.

Recently, a three-dimensional seismic isolation device for suppressing the horizontal and vertical vibrations of the base-isolated floor has been developed, and some of them have been put into practical use.

[0004]

Even if a conventional horizontal seismic isolation device and a vertical seismic isolation device are used in combination,
The rationality is poor, and the effect of three-dimensional seismic isolation is weak. In addition, the labor and cost for equipment construction increase. At present, the three-dimensional seismic isolation devices that are being developed are different from one company to another and have various construction principles and effects, and no definitive one has yet been found.

[0005] Accordingly, an object of the present invention is to raise and lower the seismic isolation floor.
Acceptable and good floor bearing mobile, by utilizing the rolling of the steel ball and a horizontal restoring mechanism has a structure to prevent unwanted swinging comprises pretensioned introduction mechanism, the movement of the upper and lower MenShinyuka To provide a three-dimensional seismic isolation device with a seismic isolation floor that uses an organic and rational combination with a viscous damper that softly resists vibration, suppresses vibration, and gradually attenuates vibration. .

[0006]

A three-dimensional seismic isolation device for suppressing horizontal and vertical vibrations of a base-isolated floor, wherein a steel gantry of the base-isolated floor is placed on a floor slab in all directions of 360 °. And a floor support part that supports the vertical movement,
A dam that attenuates the horizontal and vertical movement of the base-isolated floor
It is composed of a restoration mechanism for the par and the original position,
The floor supporter places the mounted steel plate on a plurality of steel balls rolling on a steel plate fixed on a floor slab at the foot of a support for supporting a steel frame of the base-isolated floor , and surrounds the mounted steel plate around the mounted steel plate. steel
Ball circulation path that allows the ball to circulate while rolling
Having a steel ball retainer attached to the outer periphery of the mounted steel plate
A rolling bearing portion comprising: a rolling bearing portion, and a steel plate mounted on the rolling bearing portion
Upright guide provided vertically above the building, and seismic isolation
The upward guide is provided vertically downward from the steel frame on the floor.
With a downward guide fitted so that it can slide
Between the rolling bearing and the steel frame on the base-isolated floor.
The vertical vibration of the steel frame is allowed and the horizontal force is transmitted.
Up and down sliding mechanism, seismic isolation
The floor vertical restoring mechanism is based on the floor
The vertical slide mechanism is provided between the bearing and the steel frame.
Installed around the perimeter of the building to constantly support the load on the base-isolated floor
Compression type vertical bar with air spring and air pressure control means
And the vertical movement of the base-isolated floor
The vertical viscous damper for damping the movement is
The upper end is placed on the steel plate that constitutes the rolling bearing at the foot of
An open cylindrical viscous container is provided vertically upward.
High viscous material with high viscous shear resistance
Is housed vertically downward from the steel frame on the base-isolated floor.
The same cylindrical viscous resistance receiver provided
Being inserted in a highly viscous body in the body container,
Horizontal viscous body damping horizontal movement of the seismic isolation floor
The damper is fixed on a floor slab,
Diameter and viscous material container sufficiently large trough type, the viscous material container
High viscosity material with large viscous shear resistance stored in
A support provided downward from the steel frame on the floor, and a viscous body
Immersed in a highly viscous material in the container and
Parallel with a certain amount of gap by multiple protrusions between
It is configured in a bucket shape with the viscous resistance receiving plate
Into the cylinder provided vertically upward on the upper surface of the resistance receiving plate
The support is slidably fitted, and the
A configuration that allows vertical movement and transmits horizontal force.
The horizontal restoring mechanism of the floor is sliding on the primary and secondary sides.
Consists of a freely fitted cylinder and plunger
And the rear end of the cylinder and the front end of the plunger
Both ends of the tension coil spring are fixed between
A fixed part at the other end to a part fixed at one end of the coil spring
A pretension introducing mechanism for expanding and contracting the coil spring between
The primary side is fixed to the floor slab and the secondary side
Transmits only the rolling bearing and the pulling force of the floor bearing.
With an appropriate amount of pretension.
Configured as an extended tension type horizontal spring mechanism
, Respectively.

[0007]

[0008]

[0009]

[0010]

[0011]

[0012]

[0013]

[0014]

[0015]

[0016]

[0017]

[Function] When a horizontal force due to an earthquake or the like acts on a building and the floor slab 3 moves horizontally, the seismic isolation floor 25 (of the steel frame 2) supported on the floor slab 3 by the floor support portion 1 is placed on the floor. Bearing 1
Rolling of the steel ball 17 interposed between the floor slab 3 and the floor at the foot of the vehicle, the member relatively smoothly moves with small frictional resistance. Thus the resulting relative horizontal movement relative MenShinyuka 25 floor slab 3, the horizontal spring mechanism 12 of the tensile type is stretched
To accumulate recovery Motochikara Te. At the same time, horizontal direction viscous damper 4, its viscosity resistance receiving plate 4d is damping effect undergo viscous shear resistance of the viscous body 4b is achieved, suppress horizontal vibrations of MenShinyuka 25 soft (vibration Prolong the cycle and reduce the displacement). The seismic isolation floor 25 that has relatively moved is restored to its original position by the restoring force of the horizontal spring mechanism 12. When a pretension is introduced into the horizontal spring mechanism 12, the relative movement of the seismic isolation floor is completely restrained for a horizontal input less than the magnitude of the pretension, thereby preventing unnecessary shaking.

[0018] If the acts vertical force due to an earthquake or the like MenShinyuka 25 MenShinyuka 25 (steel frame 2) is shaken in the vertical direction, the shaking, up and down direction slide mechanism 1 of the floor bearing 1
The slide operation between 3a and 19c is allowed freely. Hand, vertical spring mechanism 40 of compression type accumulates a restoring force is more compressed downward movement of MenShinyuka by vertical input. At the same time, the up and down direction viscous damper, damping viscous resistance receptacle 13b is subjected to the viscous shearing resistance of the viscous body 16 is exerted to suppress the vertical vibration of MenShinyuka soft. Thereafter, the seismic isolation floor is restored to its original position by the compression type vertical spring mechanism 40.

Thus, the effects of the horizontal seismic isolation against the horizontal shaking and the vertical seismic isolation against the vertical shaking are simultaneously and combinedly played, so that the effect of the three-dimensional seismic isolation is realized . It is.

[0020]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
FIGS. 1, 2 and 3 show the basic structure of a three-dimensional seismic isolation device for a seismic isolation floor according to the present invention. Concrete floor slab 3 shown in FIG. 1 is a component corresponding to each floor of the floor skeleton of the building, steel frame 2 of MenShinyuka 25 by floor bearings 1 on the floor slab 3 is approximately on a floor slab 250-3
It is supported at a height of 00 mm (see also FIG. 3). A floor plate is put on the steel frame 2 to complete the seismic isolation floor 25 ,
OA equipment is installed on the seismic isolation floor 25 for use.

The floor bearings 1 are arranged at an appropriate pitch in consideration of the planar shape of the steel frame 2 of the base-isolated floor 25 , the magnitude of the loaded load, the degree of variation thereof, and the stability of the support (FIG. 5) . The floor bearing 1 supports the seismic isolation floor by means of a rolling bearing that can freely move in all directions of 360 degrees horizontally with small frictional resistance using the rolling of many steel balls 17 at the feet. ing. In other words, the foot of the bed bearing 1 has a diameter which is horizontally fixed in mortar 41 for level adjustment on the upper surface of the floor slab 3 rolls over the 800mm position of the steel sheet 18 double
An upper steel plate 19 is placed on a number of steel balls 17. A plurality of steel balls 17, the set state by the steel ball retainer 43 having a ball circulation path to the outer periphery and the provided Replacing upper portion as to cover permits to circulate moves while rolling the steel balls 17 of the upper mounting steel plate 19 I am being restrained. Overlay steel sheet 1
9 has a semicircular shape suitable for smoothly circulating the steel ball 17 with the steel ball holder 43 therebetween. The floor bearing 1 of FIG. 1 has a diameter of 250 mm on a short shaft portion 19 a that rises upward from the above-mentioned steel plate 19.
A slightly wide spring receiving plate 19b of about mm is provided substantially horizontally, and a cylindrical upward guide 19c is arranged vertically upward at a substantially central portion of the upper surface of the spring receiving plate 19b so as to share the center line of the shaft portion 19a. Is provided. On the other hand,
A reaction force receiving plate 13 made of a circular steel plate having a diameter of about 400 mm is fixed to a corresponding position on the lower surface of the steel gantry 2 by means such as bolting, and the upward guide 19 c is provided substantially at the center of the reaction force receiving plate 13. A downward guide 13a which shares a center line and has a cylindrical axis shape having substantially the same diameter as the inner diameter of the upward guide 19c is provided downward, and the downward guide 13a is slidably fitted to the upward guide 19c to form a vertical slide mechanism. Is configured. The vertical vibration of the steel frame 2 is allowed by the sliding of the vertical sliding mechanism, and the horizontal force is transmitted. Further, between the spring receiving plate 19b and the reaction force receiving plate 13, as a vertical direction restoring Organization of MenShinyuka 25, MenShinyuka
An air spring 40 having a strength for constantly supporting the upper load 25 is installed so as to surround the outer periphery of the vertical slide mechanism in a concentric arrangement. Therefore, only when a downward vertical force greater than the support force of the air spring 40 acts, the seismic isolation floor 25
Moves downward (vertical vibration). The air spring 40 is provided with air pressure control means for compensating air pressure fluctuations during a long service period, but is not shown.

[0022] As also vertical Direction viscous body damper, the upper surface of the spring bearing plate 19b, the upward guide 19c the upper end in concentric arrangement to the viscous material container 14 is vertically upward apertured cylindrical on the outer periphery of the The viscous body container 14 contains a silicon-based or butane-based polymer compound and a high-viscosity body 16 having a large viscous shear resistance to a considerably high level. On the other hand, on the lower surface of the reaction force receiving plate 13, a thin cylindrical shape is formed on the outer periphery of the downward guide 13 a between the inner wall surface of the viscous body container 14 and the outer peripheral surface of the upward guide 19 c. the diameter of the viscous resistance receptacle 13b for holding the viscous drag gap is provided vertically downward, length of the around the lower approximately 1/3 of the viscous resistance receptacle 13b is inserted into the high viscous body 16 I have. Therefore, the downward movement in MenShinyuka 25 (Steel Ka搆2) by a vertical force acting on the MenShinyuka 25 (vertical vibration) occurs, acting viscous shear resistance of the viscous body 16 in the viscous resistance receptacle 13b This provides a damping effect that slows up and down movement and reduces displacement. As already known, the magnitude of the viscous shear resistance acting on the viscous resistance receiver 13b is determined by the viscosity coefficient of the highly viscous body 16 and the two surfaces that move relative to each other (the inner surface of the viscous body container 14 and the viscous resistance). the outer peripheral surface of the outer surface及beauty plane and the upward guide 19c of the receptacle 13b)
And the relative velocity thereof, and is inversely proportional to the size of the viscous resistance gap between the two surfaces. The viscous shear resistance is constant at the same speed regardless of the displacement amplitude and frequency. When a constant speed is given to the viscous resistance receiver 13b, the viscous shear resistance exhibits a sharp rise in a rectangular wave, reacts extremely sensitively to vibration, and has excellent responsiveness.
Therefore, the vertical viscous damper exhibits a good damping effect not only for a large earthquake but also for a small vertical vibration generated by a wind load, a weak earthquake, a large vehicle passing, or the like. This damping effect becomes more conspicuous as the higher viscosity material 16 is used.

[0023] For the embodiment of FIG. 1, the horizontal spring mechanism 12 of the tensile type MenShinyuka 25 are arranged four perpendicular four directions as around the floor bearing 1 for example, FIG. 5A, the The inward secondary side of the horizontal spring mechanism 12 is connected to the periphery of the spring receiving plate 19 b of the floor support 1 by a chain 15 that is sufficiently longer than the horizontal vibration stroke of the seismic isolation floor 25 . The primary side of the horizontal spring mechanism 12 is fixed to an angle 20 fixed to the floor slab 3 with a nut 50.
The specific configuration of the horizontal spring mechanism 12 is shown in FIGS. 4A and 4B.

A plunger 12b is provided in the cylinder 12a.
A plunger type cylinder in which is slidably incorporated,
And a tension coil spring wound around the outer periphery of the plunger type cylinder. The front end of the tension coil spring is connected to a spring receiver 31 on the forehead of the plunger 12b.
It is fixed to the outer periphery of. The base end of a tie rod 32 for connecting to the angle 20 fixed to the floor slab 3 is screwed into a cylinder head 33 at the rear end of the cylinder 12a. Is sticking out. The tie rod 3
A spring receiver 60 is rotatably mounted on the sleeve portion 22a of the sleeve-type dial 22 screwed into the external thread 32a on the outer periphery of the coil spring 2. The rear end of the tension coil spring is fixed to the outer periphery of the spring receiver 60. Thus, a pretension introducing mechanism for extending and retracting the tension coil spring with the spring receiver 31 is configured. The spring receiver 60 is prevented from coming off by the stop flange 22b. The outer end of the tie rod 32 is passed through an angle 20 fixed to the floor slab 3 and is fixed with a nut. One end of a chain 15 (or a wire) is connected to the front end of the plunger 12b, and the other end of the chain 15 is fixed to the outer edge of the spring receiving plate 19b constituting the floor support 1. .
Accordingly, when the dial 22 of the pretension introducing mechanism is turned, for example, in the normal rotation direction, the spring receiver 60 is moved rightward by the screw movement with the tie rod 32 as shown in FIG. Becomes large, the tension coil spring is extended, and a considerable pretension is set. Thus set pretension is normal times is-out work only between the spring receiving 31 <br/> before and after the abutting contact relation with the stiffness and the reaction force between the cylinder 12a and the plunger 12b 60 Balance
One. If the horizontal force acting on the building by earthquake or the like is less than the pretension, shaking MenShinyuka 25 (steel frame 2) is fully constrained as an effect of introducing the pretension, between the floor slab 3 No relative movement occurs. That generally weak horizontal vibration caused by the large vehicle traveling on the wind load and road is than Ru is prevented, routinely unpleasant sway is eliminated. When a horizontal force equal to or greater than the pretension set on the horizontal spring mechanism 12 is applied, the base-isolated floor 25 becomes the floor slab 3
Spring force generated relative horizontal movement, the horizontal spring mechanism 12 located in the moving direction and the opposite side is pulled through the chain 15, it is extended a coil spring for pulling, corresponding to extension of its relative Accumulate as resilience. FIG.
For horizontal spring mechanism 12 shown in A, expansion and contraction and direction of the tension coil spring is restricted by the sliding relationship between the cylinder 12a and the plunger over 12b. In the horizontal movement of the base-isolated floor 25 described above,
Except horizontal spring mechanism located on the positive side opposite each of the chain 15 does not adversely any force bent. MenShinyuka 25 reaches the end of the vibration stroke (amplitude) is restored to the original position <br/> location by horizontally spring mechanism 12 that accumulates a restoring force as described above.

Next, as horizontal direction viscous damper MenShinyuka 25, in FIG. 2 shows an embodiment of a tub-type viscous damper 4. As shown in FIG. 5A, the tub-type viscous body dampers 4 are completely independent of the floor support 1 and the horizontal spring mechanism 12, and more specifically, the number and the arrangement of the quake-absorbing floor 25 with respect to the plane. It is installed at each position determined by considering appropriateness. This tub-type viscous body damper 4
Diameter of about 700 mm, is fixed by means of the insert anchor or the like is formed on the viscous body receiving portion 4a floor slab 3 upper surface made of the opened synthetic resin of about about 100mm height (see FIG. 3), the viscous body receiving A high-viscosity material 4b, which is a silicon-based or butane-based polymer compound (viscous substance), is accommodated in the portion 4a . On the other hand, support 4c convey viscous resistance to the appropriate position of the lower surface of the steel frame 2 of MenShinyuka 25 is projected downward, the thin viscous resistance receiving plate 4d the lower end of the support 4c
Are mounted substantially horizontally . Viscous resistance receiving plate 4d and the viscous
A parallel viscous resistance gap s of about several mm is formed between the bottom of the sex body receiving portion 4a . Therefore, when the viscous resistance receiving plate 4d immersed in the high-viscosity material 4b moves horizontally with the relative movement between the (steel frame 2 of the seismic isolation floor 25 ) and the floor slab 3, the viscous shear receiving plate 4d is viscously sheared. Resistance works , seismic isolation floor
25 has a damping effect. The magnitude of the viscous shear resistance is proportional to the viscosity coefficient of the highly viscous body 4b, the area of the viscous resistance receiving plate 4d that moves relatively, and the relative speed thereof,
It is inversely proportional to the size of the viscous resistance gap s between the two surfaces (the bottom surface of the viscous body receiving portion 4a and the viscous resistance receiving plate 4d). Viscous shear resistance of the above, if the same speed, the displacement amplitude is constant regardless of the frequency. When a constant speed is given to the viscous resistance receiving plate 4d, the viscous shear resistance exhibits a steep rising like a rectangular wave, reacts very sensitively to vibration, and has excellent responsiveness. Therefore, the tub-type viscous body damper 4 exhibits a good damping effect not only for a large earthquake but also for a small horizontal vibration generated by a wind load, a weak earthquake, or the passage of a large vehicle. This damping effect is achieved by the high-viscosity high-viscosity material 4b.
The more remarkable it is, the more it appears.

According to the tub-type viscous-body damper 4 described above, when a horizontal movement relative to the floor slab 3 occurs on (the steel frame 2 of) the seismic isolation floor 25 , the viscous shear acting on the viscous resistance receiving plate 4d. Due to the resistance, the movement (swaying) of the seismic isolation floor 25 is changed into a gentle movement, and the damping action for reducing the displacement is exerted in all directions of 360 ° horizontally. FIG. 3 shows an embodiment of the tub-type viscous-body damper 4. However, when the overload applied to the seismic isolation floor 25 is overload, or the creep phenomenon in a long service period causes the height of the steel frame base 2 to fluctuate ( This shows an example of a configuration in which the viscous resistance gap s between the viscous resistance receiving plate 4d and the bottom surface of the viscous body receiving portion 4a is always kept constant even if a "sink" occurs. In the case of the present embodiment, the viscous resistance receiving plate 4d has a plurality of projections 4e having a height equal to the viscous resistance gap s on the lower surface thereof, and the projections 4e abut on the bottom surface of the viscous body receiving portion 4a to slide. Have been. On the other hand, under the support plate 23 which is stretched substantially horizontally between the beams of the steel frame base 2 and is fixed, the mounting plate 2
1 is attached. A cylindrical shaft 46 protrudes vertically downward from the lower surface of the mounting plate 21. On the other hand, on the upper surface of the viscous resistance receiving plate 4d, a cylinder portion 45 having a vertical upward cylindrical shape and an inner diameter substantially equal to the outer diameter of the shaft 46 is raised, and the cylinder portion 45 is raised.
The shaft 46 is slidably fitted therein. I
Therefore, the shaft 46 and the variation in the height of the steel frame 2 by sliding the cylinder portion 45 is allowed, moreover horizontal viscous shear resistance force acting on the viscous resistance receiving plate 4d is transmitted to the steel frame 2 You. Reference numeral 24 in FIG. 3 denotes an anchor bolt for fixing the viscous body receiving portion 4a to the floor slab 3, and reference numeral 25 denotes a floor panel (free access floor panel) serving as a seismic isolation floor.
This is supported substantially horizontally at a height of about 400 to 600 mm above the steel gantry 2 by a bar-shaped support (pedestal) 26.

FIG. 5A shows the planar arrangement of the three-dimensional seismic isolation device of the embodiment described above in a pattern. In this configuration, a tension type horizontal spring mechanism 12 is combined with a selected floor support 1 in a radial arrangement in four directions at right angles.
However, as shown in the arrangement pattern shown in FIG. 5B , the tension-type horizontal spring mechanism 12 is completely separated and independent from the floor support portion 1, and the braking arbitrarily determined as an appropriate arrangement on the steel frame 2 of the base-isolated floor. The present invention can also be implemented with a configuration in which the horizontal spring mechanism 12 is installed in a radial arrangement in four directions perpendicular to the point p.

[0028]

[0029]

[0030]

[0031]

[0032]

[0033]

[0034]

[0035]

According to the three-dimensional seismic isolation device of the seismic isolation floor of the present invention, the purpose of the three-dimensional seismic isolation of the seismic isolation floor is achieved as a single system, and it is frequently used in office buildings and the like. OA equipment and the like are protected from damage caused by an earthquake or the like.

[Brief description of the drawings]

FIG. 1 is an elevation view mainly showing a floor bearing portion of a three-dimensional seismic isolation device.

FIG. 2 is a sectional view showing a main part of a tub-type viscous body damper.

FIG. 3 is a cross-sectional view showing another embodiment of a tub-type viscous body damper.

4A and 4B are a cross-sectional view of a horizontal spring mechanism and an operation explanatory view of a pretension introduction mechanism.

FIGS. 5A and 5B are different plane layout patterns of the three-dimensional seismic isolation device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Floor support part 25 Seismic isolation floor (floor panel) 2 Steel frame 3 Floor slab 17 Steel ball 18 Steel plate 19 Overlay steel plate 43 Steel ball retainer 19c Upward guide 13a Downward guide 40 Spring mechanism 14 Viscous material capacity 16 High viscous material 13b Viscosity Resistance receiver 4a Viscous body receiver 4c Support s Gap 4d Viscous resistance receiver 45 Cylinder 12a Cylinder 12b Plunger 11 Tension coil spring

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Makoto Hara 8-21-1, Ginza, Chuo-ku, Tokyo Inside the Tokyo head office of Takenaka Corporation (72) Inventor Nobuo Yamaguchi 8-1-1, Ginza, Chuo-ku, Tokyo No. Takenaka Corporation Tokyo Main Office (72) Inventor Sumio Kawaguchi 8 Kirihara-cho, Fujisawa-shi, Kanagawa Prefecture Inside Oiles Industry Co., Ltd. (56) References JP-A-52-103823 (JP, A) JP-A-1- 226953 (JP, A) JP-A-1-145441 (JP, A) JP-A-1-182452 (JP, A) JP-A-2-266135 (JP, A) JP-A-3-84161 (JP, A) Hikaru 4-6433 (JP, U)

Claims (1)

(57) [Claims] 1. A three-dimensional seismic isolation device for suppressing horizontal and vertical swaying of a base-isolated floor, wherein a steel frame of the base-isolated floor is placed on a floor slab in a horizontal direction of 360 ° in all directions and in a vertical direction. a floor bearing part move the can be supported, a damper for damping the movement of the horizontal and vertical MenShinyuka
And it is composed of a restoration mechanism to the original position, the floor bearing part is a plurality of steel balls rolling support feet of fixed steel above on a floor slab to support the steel frame of MenShinyuka Steel plate on top of
While the steel ball rolls around the overlying steel plate
The above-mentioned steel having a spherical circulation path which allows circulation movement
A rolling support comprising a steel ball retainer mounted on the outer periphery of a plate
A bearing part and a vertically upward part on the steel plate mounted on the rolling bearing part.
Upward guide and vertical downward from the steel frame of the base-isolated floor
Slidably fitted to the upward guide
A downward guide, and the rolling bearing and
The vertical vibration of the steel frame is installed between the base and the steel frame on the base isolation floor.
A vertical slide mechanism that allows movement and transmits horizontal force
In that it is constituted, vertical restoring mechanism of MenShinyuka the rolling of the feet of the floor support portion
The vertical slide between the beam support and the steel frame
It is installed to surround the outer periphery of the mechanism and constantly loads the seismic isolation floor.
Up and down compression type with supporting air spring and air pressure control means
It is configured as a counter spring mechanism, vertically viscous material damper for damping the vertical movement of MenShinyuka
Is used to form the rolling support at the foot of the floor support.
A cylindrical viscous body container with an open upper end on a mounted steel plate
It is provided vertically upward and the viscous container is
A high-viscosity body with high resistance is housed, and a steel frame
A similarly cylindrical viscous resistor provided vertically downward from the table
An anti-receptor is inserted into the high-viscosity body in the viscous body container.
It was a configuration, the horizontal direction viscous body da to damp horizontal movement of the MenShinyuka
The damper is fixed on a floor slab,
Diameter and viscous material container sufficiently large trough type, the viscous material container
High viscosity material with large viscous shear resistance stored in
A support provided downward from the steel frame on the floor, and a viscous body
Immersed in a highly viscous material in the container and
Parallel with a certain amount of gap by multiple protrusions between
It is configured in a bucket shape with the viscous resistance receiving plate
Into the cylinder provided vertically upward on the upper surface of the resistance receiving plate
The support is slidably fitted, and the
The structure that allows vertical movement and transmits horizontal force, and the horizontal restoring mechanism of the base-isolated floor
With a cylinder and a plunger fitted freely.
And the rear end of the cylinder and the front end of the plunger
Between both ends of the tension coil spring.
The other end of the coil spring is fixed to the part where one end of the coil spring is fixed.
A pretension introducing machine for extending and retracting the coil spring between portions
The primary side is fixed to the floor slab,
The next side transmits only the rolling bearing and the pulling force of the floor bearing.
To reach an appropriate amount of pretension.
Configured as a tension type horizontal spring mechanism inserted
It Is, characterized by each of three-dimensional seismic isolation device MenShinyuka.