JPH04185877A - Response control bearing - Google Patents

Abstract

PURPOSE:To make it possible to construct a response control structure when response control is not required by making pressure-fit of high-pressure fluid between a bearing board and a bearing to bear the structure in the case of response control, and bringing the bearing into contact with the bearing board by reducing fluid pressure in the case of response control to bring the bearing into contact with the bearing board. CONSTITUTION:A high-pressure fluid supply device is connected to a seal space 4 formed between a bearing board 2 and a bearing 3, and ball blocks 12 and magnetic fluid (b) provided to the bearing 3 are provided to the peripheral surface edge of the space 4. In the case of response control, air is supplied from an air supply pipe 7 to the space 4, and when the space 4 reaches a specific height within range of the availability of a seal from the magnetic fluid (b), it is detected by a distance sensor 8 to close an automatic control valve 6, and an interval between the bearing 3 and bearing board 2 is held. When the state is changed to response control, the control valve 6 is connected to an air exhausting air supply pipe 7' to reduce air-pressure in the space 4, and the bearing 3 is brought into contact with the bearing board 2 so that frictional force can work between both of them.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is mainly aimed at low- and medium-rise buildings, and is aimed at seismic isolation buildings that economically reduce horizontal earthquake input, or isolating floors on which computers, etc. are installed. This article relates to a seismic isolation support that can be used as an IF seismic isolation structure at times of strong winds or other times when it is necessary, such as on seismic isolation floors.

(Prior Art) Conventionally, in seismically isolated buildings, it has been necessary to consider and consider ways to avoid unpleasant shaking during strong winds, etc., and in many cases H has been dealt with by the rigidity of metal dampers. In addition, in order to prevent seismic isolation floors from swinging uncontrollably due to external forces caused by work, etc., a trigger device is installed or a spring mechanism is devised so that the seismic isolation device is activated when a certain external force is applied to the board. However, by increasing the rigidity of the metal damper and adding innovations to the spring mechanism, it is possible to avoid wobbling due to small external forces, so the seismic isolation effect is not effective against small vibrations such as traffic vibrations and small earthquakes. If you don't get much or are using a trigger device, after an earthquake,
It was necessary to restore the trigger device to its original state.

The present invention solves the problems of the prior art described above. The purpose of this is to create an isolation structure that can be used as a non-seismic isolation structure for long-term vibration sources of strong winds, or for other cases where seismic isolation is not required. Its purpose is to provide seismic support.

(Means for solving the problem) In order to achieve the above object, the seismic isolation bearing according to the present invention has the following features:
A high-pressure fluid supply device is connected to the seal space formed between the bearing plate installed on the base and the support of the structure, and a pole block mounted on the support and a magnetic In a support structure for a structure provided with a fluid seal, the tip of the pole block is slidably mounted on the support within a range in which it projects a predetermined length from a retracted state from the support.

(Function) Since the present invention is configured as described above, during seismic isolation, high-pressure fluid is injected into the seal space formed between the bearing plate on the foundation and the support of the structure. Support the body with body pressure.

At this time, the outer periphery of the seal space is sealed by the magnetic fluid and the pole block mounted on the support to prevent the seal from breaking when the high-pressure fluid is forced into the sole space.

Therefore, since only fluid exists between the bearing pressure plate and the bearing, almost no frictional force acts and only vertical force is supported.

In the case of non-seismic isolation, the fluid pressure in the seal space is reduced to bring the bearing and the bearing pressure plate into contact with each other to generate a frictional force between them.

Since the tip of the pole block is retracted from the support, the pole block is slidably mounted within a range where it protrudes by a predetermined length, so that it is suitable for increasing or decreasing the fluid pressure in the seal space. The pole block slides relative to the support in response to a change in the distance between the support and the bearing pressure plate.

(Example) The present invention will be described below with reference to an embodiment of L4.

Reference numeral 1 denotes a structure, which is supported on a bearing plate 2 installed on a foundation via a seismic isolation bearing a of the present invention.

In the seal space 4 formed between the bearing 3 and the bearing pressure plate 2 installed in the above-mentioned structure in the seismic isolation bearing a, a near compressor 5 is connected to an air pipe 7 in which an automatic control valve 6 is interposed in the middle. A distance sensor 8 detects the distance between the support 3 and the bearing plate 2, and this detection signal is sent to an amplifier 9.
In conjunction with the external input data 10 that is increased in intensity and sent to the automatic control valve 6 and supplied to the valve opening 6, the gap in the seal space 4 is adjusted to a - This controls the control valve 6 so as to maintain the same.

In the figure, reference numeral 11 indicates distance data sent from the distance sensor 8 to the control valve 6, and reference numeral 7' indicates an air pipe connected to the control valve 6 and discharging high-pressure air within the seal space 4.

Reference numeral 12 denotes a pole block disposed on the outer periphery of the seal space 4, and the tip of the ball block 12 extends from the support 3 by a predetermined distance from the retracted state. If it is difficult to manufacture a cylindrical magnet that connects pole blocks 12 that are not slidably mounted, bar magnets 13 are used.

Furthermore, a magnetic fluid supply device appropriately supplies magnetic fluid to the outer peripheral edge of the seal space 4, so that the seal space 4 is sealed.

In the figure, reference numeral 14 denotes a stopper, which is arranged so that the pole block 12 portion slides and stops at a predetermined position.

Since the illustrated embodiment is configured as described above, when performing seismic isolation, air is sent into the sealing space 4 through the air piping 7 and the sealing by the magnetic fluid is performed as shown in FIG. When the space 4 reaches a predetermined height within an unbroken range, the distance sensor 8 detects this and closes the automatic control valve 6 to maintain a constant distance between the support 3 and the bearing pressure plate 2.

To make the base isolation non-seismic from this state, by connecting the control valve 6 and the air pipe 7' for air release to reduce the air pressure in the seal space 4, the support 3
And bearing pressure 4! i2, so that the frictional force moves on both sides.

At this time, the pole block 12 slides on the support 3 and does not hinder the movement of the support 3.

Further, when increasing the frictional force between the support 3 and the bearing pressure plate 2, the contact surfaces of either or both of them are formed to have a rough surface.

FIG. 4 shows another embodiment of the present invention, in which the support 3 is made of a magnetic material such as iron, and the space between the pole block 12 and the support 3 is sealed with a non-magnetic seal 15.

Furthermore, the pole block I2 is arranged outside the support 3 to facilitate the management of the magnetic fluid.

Note that the pole block 12 may be fixed to the support 3 in such a manner that the end thereof does not protrude beyond the support 3.

Note that although the above-mentioned embodiment shows a circular support, it may also be constructed in a rectangular shape.

(Effects of the Invention) As described above, the seismic isolation bearing according to the present invention connects the high pressure fluid supply device to the seal space formed between the bearing pressure plate of the foundation and the support of the structure, and By providing the pole block mounted on the support and the magnetic fluid seal on the outer periphery H of the space, the vertical load of the structure is supported by the fluid pressure within the seal space. In this way, since only fluid exists within the same seal space, there is almost no frictional force, and only vertical force is supported, and horizontal force does not require human effort, so it exhibits an excellent seismic isolation effect. It is.

In addition, during seismic isolation (No. 1), by lowering the lA body pressure in the seal space and bringing the bearing and the bearing pressure plate into contact,
This creates a frictional force between the two, and in this case,
This frictional force prevents unnecessary damage to the structure.

Fig. 3 is a longitudinal sectional view showing the state of one embodiment of the invention when seismically isolated and when it is not seismically isolated, Fig. 3 is a partial cross-sectional plan view thereof, and Fig. 4 is ! ...Structure, 2...Bearing plate, 3...Support,
4... Sole space, 5... Near compressor, 6... Automatic control valve, 7.7'... Air piping,
8... Distance sensor, 12... Pole block.

Agent Patent attorney Shige Okamoto 1 other person Fig. 1 / : Tokinoomono 11: Distance theta 2: Bearing plate / 2: Pole pro ivy 8: Bearing / 3
：Bōnseki 4：Seal space /4：Stopper 7：Air piping b：Magnetic fluid 8：Ekeigureshin → 2 sensors Fig. 2 Fig. 3 Fig. 4 Fig. 5

Claims (1)

[Claims] 1. A high-pressure fluid supply device is connected to the seal space formed between the bearing plate installed on the base and the support of the structure, and a high-pressure fluid supply device is connected to the outer periphery of the seal space to the support. In a support structure for a structure comprising a mounted pole block and a magnetic fluid seal, the tip of the pole block is movably slidable on the support within a range in which it protrudes a predetermined length from a retracted state from the support. A seismic isolation bearing characterized by being mounted on a base. 2. The seismic isolation support according to claim 1, wherein the pole block end is fixed to the support without protruding from the support.