JPS59179970A - Earthquake-proof apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seismic isolation device that reduces seismic input to buildings, equipment, and other installations caused by an earthquake.

Conventionally, a seismic isolation device using a laminated comb has been known as a seismic isolation technology for isolating seismic energy from installed objects. This seismic isolation device uses laminated rubber to bear the vertical load and reduce the seismic response acceleration of the installed object, or is there one that adds friction to absorb the earth's energy? A rubber-only product will not cause any residual displacement, but a product with a displacement or thick negative friction will produce a residual displacement, which must be removed, which requires additional operations and mechanisms, and requires additional friction removal. Since vertical loads are constantly applied to the rubber, which has unstable performance and is prone to deterioration, there is a lack of reliability, and it is necessary to provide a compensation mechanism to bear the vertical loads or to increase the load-bearing ability of the rubber. Because of this, there was a drawback that there were no design restrictions on the area or height.

The present invention overcomes the above-mentioned drawbacks and allows the load of installed objects such as buildings and equipment to be supported by a support that does not require a low-friction material with a very low coefficient of friction. The purpose of the present invention is to provide an explanatory device in which the material is absorbed, the low friction material 6 provides a lubricating effect, and the elasticity of the hollow cylindrical rubber restores the original state.

Embodiments of the present invention will be described below with reference to the drawings.

(1) is a fixed plate with a surrounding wall (11) around it, and li6
The inner wall bottom fin (12+ is chrome-plated and puff-polished to reduce friction.Q3i has an anchor hole, and the fixing plate (1) is fixed to the foundation etc. with bolts o and 4). The hollow cylindrical column (2) is tightly fitted on the outer periphery of the surrounding wall 01), and the lower part of the outer periphery C2]+ is a hole)
) through the threaded hole (15) of the fixed platen (1, 1, upper outer periphery 04). ) is installed. The base of an installation such as a building or equipment is mounted on the mounting board (3) through the mounting hole (34) from the (33) rIC. A support (4) is disposed between the fixed plate (1) and the mounting plate (3), and the support (4) connects the upper ends of the many support legs (41) to the support plate (42).
), and a low-friction material (44) made of fluororesin such as Teflon (trade name) is adhered to its lower end, leaving a minute gap between it and the inner bottom surface (12) of the enclosure to create a viscous resistance surface. (
43). The mounting plate (3) and the support body (4) are connected through the mounting hole (35).
2), and is formed by the inner bottom surface of the surrounding wall 02), the surrounding wall 01), and the inner wall of the hollow cylindrical rubber (2).
The inside is filled with a viscous fluid (6) made of a viscous polymeric substance such as silicone oil to such an extent that the lower part of the support leg (4υ) is immersed.

Next, the operation during an earthquake will be explained.

Due to Earthquake C, fixed plates fixed to foundations (1) and mounting plates (3) attached to the bases of buildings, equipment, etc.
) to cause a relative displacement, or silicone oil or the like is placed in the sealed chamber (5) between the low-friction material (44) of the support (4) and the inner bottom surface (12) of the surrounding wall of the fixed platen (1). Since the viscous fluid (6) made from the viscous polymer substance is filled, viscous resistance acts between the viscous resistance surface (43) and the inner bottom surface (12) of the enclosure, preventing the movement of the mounting plate (3). acts to prevent
Stop the movement of the installation installed on the mounting board (3). In this case, the viscous resistance force of the viscous fluid is the resistance force due to viscous shear, or this force is proportional to the viscosity coefficient of the viscous fluid, the area of the two surfaces performing relative motion, and the relative velocity, respectively.
The gap between the two surfaces (which is inversely proportional to the gap between the two surfaces, and by appropriately selecting the material of the viscous fluid, the area between the two surfaces, and the gap between the two surfaces, the two-handed vibration can be absorbed and the relative motion can be quickly controlled. The weight of all the installations installed on the mounting board (3) is the support leg (41) of the support body (4).
) to the low friction material (44), but the low friction material (44)
is in contact with the inner bottom surface (12) of the surrounding wall, which is a chrome-plated polished surface of the fixed plate (1), and the low friction material (44) is a 7-base resin such as Teflon (trade name), so there is no frictional resistance. is extremely small, and the sealed chamber (5) is filled with a viscous fluid (6) made of a viscous polymer substance such as silicone oil, so that the low friction material (44) and the inside of the surrounding wall and bottom surface (1
2) Because it exerts a lubricating effect on and, it receives almost no frictional resistance other than the elastic resistance from the hollow cylindrical rubber (2), and stops its relative motion mostly due to the viscous resistance from the viscous fluid (6). At the same time, the elastic restoring force of the hollow cylindrical rubber (2) restores the mounting plate (3) to the position before the displacement due to the earthquake.

This restoring force can be easily optimized by appropriately adjusting the rubber material, outer diameter, thickness, and height.

Although the present invention has been described with respect to the above-mentioned embodiment, it is not limited to this embodiment, and various design changes can be made without changing the technical idea of the present invention.

In other words, the low friction material (44J) is directly glued to the lower end of the support (4) or the support leg (41).
A low friction material (44) may be adhered to the lower end of the support leg (41) via a plate having a viscous resistance surface (43).
It is also possible to omit step 1) and provide a cylindrical support (4) in which the support plate (42) and the plate having the viscous resistance surface (43) are integrated. Furthermore, the low friction material (44) is Teflon (
Instead of a fluorine ridge resin like product name), a rolling support such as a ball bearing can be used.

Also, do not remove any buildings or equipment installed on the mounting board (3).
Instead of attaching the hole (34) through the hole (33), the hole (32) used to attach the mounting plate (3) and the support (4) can be used in some cases. (4) may be attached.

Since the seismic isolation device of the present invention has the above-mentioned configuration and functions, it can: 1) avoid earthquake damage from being applied to the installed object, thereby improving safety; The absorption of seismic energy by 2 is extremely small, and there is no direction to resist earthquake vibration υ, and seismic energy is mainly absorbed by viscous fluid (6), which has no direction, so it is distributed evenly in all directions. ■Instead of using friction materials to reduce displacement due to earthquakes, the vertical load can be reduced by using low-friction materials (4
4) is supported on the support body (4), and the viscous fluid (6)
Since the displacement is absorbed by the viscous fluid (6), the damping effect due to the viscous fluid (6) is the only influence. It acts sensitively against vibrations and has excellent immediate response to earthquake energy attenuation.■Uses viscous fluid instead of friction material, so it has stable A-rugi damping performance.■Support (4) A low-friction vJ' (44) is attached to support the load, and the viscous fluid (6) provides a lubricating effect to the low-friction material (44), so it receives extremely little frictional resistance. , hollow cylindrical rubber (
2) Since it can be restored to the position before displacement using only the elasticity, there is no need to shift and restore the original position unlike in the conventional technology, eliminating the frictional state of the friction mechanism. Since there is no extra mechanism on the outside, it is robust and easy to handle.■ All the vertical loads of the installed object are supported by the support (4), and no vertical load is always applied to the hollow cylindrical comb (2), which makes it easier to handle than before. There is no need for a compensation mechanism to bear the vertical load required when a laminated comb that easily deteriorates or breaks, as in conventional technology, and hollow cylindrical rubber (
2) has many advantages in that it can be designed freely without being restricted by its area or height.

In addition, according to the configuration of the embodiment, the surrounding wall (11) l the inner shrine lS
The chamber (5) formed by the hollow cylindrical rubber (2) and the hollow cylindrical rubber (2) are sealed off from the outside, preventing foreign matter from entering and preventing the deterioration of the polymeric viscous substance. There is an effect that can be done.

[Brief explanation of the drawing]

The drawings show an embodiment of the seismic isolation device of the present invention, in which Fig. 1 is a cut-away slope view, Fig. 2 is an exploded enlarged cut-away front view, and Fig. 3 (see Fig. 2 n+- ■The bottom of the line In1
It is a diagram. ]...Fixed plate, 2. Hollow cylindrical comb, 3. Pick up plate, 4.
...Support, 44 Low friction material, 5 Sealed chamber, 6... Viscous fluid. Patent Applicant Takenaka Construction Co., Ltd. (and 2 others) Agent Patent Attorney Kiyoshi Sakai 1 Continuation of Figure 1 Page 0 Inventor Aizawa Party No. 2-5-14o Minamisuna, Koto-ku, Tokyo Takenaka Corporation Technical Research Institute (Akira Oki) Taku Miyake @2-5-14 Minamisuna, Koto-ku, Tokyo Takenaka Corporation Technical Research Institute Inventor Hideki Nomoto 8-21 Ginza, Chuo-ku, Tokyo No. 1 Takenaka Corporation Tokyo Head Office Inventor: Ikuo Shimoda 1449-4 Kirigaya, Engyo, Fujisawa City ■Inventor: Gara Ikenaga 1632 Ishikawa, Fujisawa City Oiles Industries Co., Ltd. Fujisawa Dormitory 0 Inventor: Chiaki Tsuruya Fujisawa 1632 Oiles Industries Co., Ltd., Fujisawa-ryo - Yozuri, Ishikawa City Address: 236-10 Hamanogo, Chigasaki-shi, Ishikawa Address: Oiles Industries Co., Ltd. 1-3-2 Shibadaimon, Minato-ku, Tokyo Applicant: JGC Corporation, Chiyoda-ku, Tokyo Otemachi 2-2-1

Claims (1)

[Scope of Claims] 1. Attach the base of the installation (fix it to the base mounting board (3) and the base, and install a low-friction material (
41), a support body (4) having a viscous resistance surface (43) with a gap between it and the fixed platen (1) is provided, and the support body (4) is surrounded by a hollow cylindrical column (2) on the side, and the inside thereof is ￥fIS'IC
A seismic isolation system in which a viscous fluid (6) is sealed to fill the gap 0IJ: L 2 The space formed by the mounting board (3), the identification board (1), and the hollow cylindrical comb (2) is a sealed chamber (5 The seismic isolation device according to claim 1, which has the following characteristics. 3. The seismic isolation device according to claim 1 or 2, wherein the low friction (・1・1) is fluorine-tolerant. 1 The seismic isolation device according to any one of claims 1 to 3, wherein the viscous fluid (6) is a polymeric viscous substance such as silicone oil.5. The seismic isolation device according to any one of claims 1 to 4, which has a polished surface.