JPH0285463A - Horizontal displacement restoring device for earthquake-proof floor - Google Patents

Abstract

PURPOSE:To surely realize a restoring mechanism and always provide a constant restoring force by providing a vertically downward force onto a ball bearing by the restoring force of an urging mechanism such as spring and assisting the lowering of the ball bearing. CONSTITUTION:A restoring device A is constituted of a bearing body 1, recessed surface plate 3 which is connected with a frame E supporting an earthquake- proof floor D and slides on the bearing body 1 through a number of ball bearings 2, large-sized ball bearing 4 which rolls on the recessed surface plate 3, pressing plate 5 placed on the bearing 4, and an urging mechanism 6. The recessed surface plate 3 is shifted horizontally through the displacement of the earthquake-proof floor D, and the bearing 4 rolls on the recessed surface plate 3 and pushes up the pressing plate 5, and after the earthquake-proof floor D stands still, the pressing plate 5 is pushed down by the restoring force of the urging mechanism 6, and the bearing 4 is lowered to restore to an ordinary position, and the earthquake-proof floor D is restored.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a horizontal displacement restoring device for a seismic isolation floor, which returns the seismic isolation floor to its original position when the seismic isolation floor is horizontally displaced relative to the frame.

[Problem to be solved by the invention]

The mechanism of the restoring device that returns the seismic isolation floor to its original position when it is horizontally displaced is generally one that relies directly on the restoring force of a large number of springs arranged around the seismic isolation device, and one that relies directly on the restoring force of a large number of springs arranged around the seismic isolation device, and a concave mechanism that is connected to the seismic isolation floor. There are two main types: those that use ball bearings that roll down on a plate, but the former does not utilize its restoring force when the amount of displacement is small, and the latter has its own difficulties in adjusting the magnitude of the restoring force. The reality is that we are facing challenges.

This invention has been made in light of the current state of restoration devices, and aims to propose a new device with a mechanism that solves the above-mentioned problems.

[Means to solve the problem]

In the present invention, a ball bearing rolling on a concave plate with a concave upper surface is urged vertically downward by a biasing mechanism, and when the seismic isolation floor is displaced, that is, when the ball hair ring rolls up on the concave plate, the By assisting the descent after coming to rest with the restoring force of the biasing mechanism, a constant restoring force is applied to the seismic isolation floor regardless of the amount of displacement, thereby realizing a reliable restoring mechanism.

The concave plate is installed on a support with a horizontal top surface via a large number of small ball hair rings, which is fixed to the structure, and at the same time is insulated from the structure with a seismic isolation device and attached to the frame that supports the seismic isolation floor. They are connected and behave together with the seismic isolation floor when the seismic isolation floor is horizontally displaced, sliding on the support.

The ball bearing is normally located at the lowest position on this concave plate, and is placed on top of the concave plate and is placed between the concave plate and the presser plate that grips it so that it can roll. It is compressed downward and pinched by a biasing mechanism such as a spring that biases it vertically downward.

When the seismic isolation floor is displaced, as the concave plate moves, it rolls up on the concave plate while resisting the force of springs, etc., and after it comes to rest, the pole is generated by the restoring force of the vertically downward biasing mechanism added to the weight of the ball hair ring. The downward force of the hair ring causes the concave plate, that is, the seismic isolation body, to return to its original position.

〔Example〕

The present invention will be explained below based on the drawings showing one embodiment.

The horizontal displacement restoring device (hereinafter referred to as restoring device A) A of the present invention is connected to a seismic isolation floor insulated from a body C by a seismic isolation device B, as shown in FIG. This is to return it to its original position when it is horizontally displaced relative to the

As shown in the figure, the restoration device A is fixed to the frame C, connected to a support 1 whose upper surface is horizontal, and a frame E that supports the seismic isolation floor, and a large number of small ball bearings 2 are mounted on the support 1.
a concave plate 3 that slides through the concave plate 3; a large ball ring 4 that rolls on the concave plate 3; a holding plate 5 that rests on the ball bearing 4 and grips it in a freely rolling manner; It is composed of a biasing mechanism 6 that biases the presser plate 5 vertically downward.

As shown in Figure 2-I, the seismic isolation floor consists of a frame E constructed at a distance from the frame C and a floor panel 8 laid on support legs 7 installed on top of the frame E. It is separated from the main body C by a seismic isolation device B installed between the frame 8 and the frame 8.

As shown in the figure, the support 1 is placed on a leveling material 9 that smooths out the unevenness of the top surface of the body C, and the bolts 1 are attached to a heath plate 11 fixed to the body C by anchor bolts 10.
Fixed by 2.

A concave plate 3 is placed on this support 1 so as to be slidable in a horizontal plane by means of a large number of ball bearings 2. The small ball bearing 2 is surrounded by a guide block 13 arranged around the bearing 1.

The concave plate 3 has a horizontal bottom surface and a concave top surface,
As shown in FIGS. 2-I and H, it is connected to the frame E of the seismic isolation floor by a connecting member 14 such as a turnbuckle, and behaves simultaneously with the relative horizontal displacement of the seismic isolation floor. Both ends of the connecting member 140 are connected to the concave plate 3 and the frame E so as to be rotatable around a horizontal axis, so that vertical displacement of the seismic isolation floor is not transmitted to the concave plate 3.

As shown in FIG. It is held so that it can roll freely, and is normally located at the lowest level of the concave plate 3, that is, at the center.

Around the holding plate 5, as shown in FIG. 2-H, there are
A casing 5a is integrally formed, and a biasing mechanism 6 is disposed within the casing 5a as shown. In the embodiment, an example is shown in which a spring is used as the biasing mechanism 6, but the spring 6 has a vertical axis and is attached to the bottom plate 5 of the casing 5a.
b and a catch seat 17 separated from the holding plate 5.

Then, the spring is compressed by the bottom plate 5a and the catch seat 17 by adjusting the adjustment bolt 18 inserted vertically between the base plate 11 and the catch seat 17 at the center position of the casing 5a, and its restoring force causes the retainer plate to be compressed. 5 presses the concave plate 3 onto the support 1.

A clearance C is provided between the bottom plate 5a and the base plate 11 so that the restoring force of the biasing mechanism 6 is transmitted to the holding plate 5, and when the concave plate 3 moves horizontally and the holding plate 5 moves up and down, Base plate 1 as a guide for casing 5a
A guide ring 19 is provided protrudingly around the casing 5a of 1.

In the restoration device A having the above configuration, when the seismic isolation floor is horizontally displaced, the concave plate 3 moves horizontally at the same time as the seismic isolation floor, and accordingly, the pole bearing 4 rolls up on the concave plate 3 and presses down. After the plate 5 is pushed up and the seismic isolation floor comes to rest, the holding plate 5 is pushed down by the restoring force of the biasing mechanism 6, and the component of that force in the direction of the sloped surface of the concave plate 3 lowers the ball bearing 4, and the normal The mechanism is such that the seismic isolation floor is restored to its original position.

In the embodiment, the biasing mechanism 6 uses the restoring force when the spring contracts to push down the presser plate 5, but the effect is the same even if the restoring force when the spring is expanded is used as shown in Fig. 1. be.

FIG. 3 shows an example of the configuration of a seismic isolation body with the restoring device A installed. This restoring device A uses the vertically downward restoring force of the biasing mechanism 6 to move the pole hair ring 4 along the slope surface. It is a mechanism that lowers the seismic isolation device and returns it to the original position, and as it exhibits a certain level of restoring performance regardless of the amount of displacement, a small number of seismic isolation devices is sufficient compared to the number of seismic isolation devices B installed as shown here. become.

〔Effect of the invention〕

This invention is as described above, and as described above, a vertically downward force is applied to the ball bearing by the restoring force of the biasing mechanism such as a spring, and the component of the force in the direction of the sloped surface of the concave plate prevents the ball bearing from descending. Because it helps, the restoring mechanism becomes reliable, and a constant restoring force can always be applied to the seismic isolation floor.

[Brief explanation of drawings]

Figure 1 is an elevational view showing the outline of the present invention, Figure 2 - I, I
I is an elevational view showing an example. The plan view and FIG. 3 are elevational views showing an example of the structure of the seismic isolation floor. A: Horizontal displacement restoration device, B: Seismic isolation device, C: Frame, D: Seismic isolation floor, E
...Frame, 1...Support, 2...
... Ball bearing, 3 ... Concave plate, 4
... Ball bearing, 5 ... Holding plate, 5a ... Casing, 5b ... Bottom plate, 6 ... Biasing mechanism, 7. ...Support leg, 8
...Floor panel, 9...Leveling material,
10... Anchor bolt, 11... Base plate, 12... Bolt, 13...
...Guide block, 14...Connection member, 15
...Guide block, 16...Ball bearing, 17...Catch, 18...
8 round adjustment Porto, C... Clearance, 19...
...Guide ring.

Claims (1)

[Claims] (1) A restoring device that is connected to the frame that supports the seismic isolation floor, which is insulated from the building structure with a seismic isolation device, and restores the horizontal displacement of the seismic isolation floor relative to the structure. a concave plate with a concave top surface that is connected to the frame and slides on the support via a number of small ball bearings; A large rolling ball bearing, a holding plate that is placed on the ball bearing and grips it so that it can roll, and a casing that is integrated with the holding plate and urges the holding plate vertically downward. A horizontal displacement restoring device for a seismic isolation floor consisting of a biasing mechanism.