JPH0243430A - Anti-seismic device and anti-seismic and vibration-preventing device - Google Patents

Abstract

PURPOSE:To break vibration of a substructural body by composing the titled device of a supporting body to support a superstructural body, a bearing plate fixed in the substructural body, a number of ball bearings provided between them, and a guide block. CONSTITUTION:The titled device consists of a supporting body 1 for supporting a vertical load and having a horizontal bottom surface, a fixed bearing plate 2 having a smooth and highly rigid horizontal surface, ball bearings 3 provided between them, and a guide block 4 fixed around the supporting body with a clearance (c). When the superstructural body B1 moves relative to a substructural body B2, the ball bearings 3 on the other side to the moving direction of the supporting body 1 are guided by the guide block 4 to get into the clearance (c) and then go to the moving direction side to be put between the supporting body 1 and the bearing plate 2 again. The ball bearings 3 are thus always put on the friction surface, thereby vibration isolating effect can be achieved sufficiently.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a seismic isolation device and a seismic isolation/vibration isolator that are mainly installed on a seismic isolation floor.

[Problem to be solved by the invention]

Rolling bearings, which are conventionally used as floor seismic isolation methods,
Among sliding bearings, dampers, etc., rolling bearings have the highest insulating effect, but when using ball bearings as rolling members, in order to always ensure stable support by the bearings, it is important to know how to arrange the bearings, that is, how to place the bearings.
The problem is how to handle the relative movement with the support that rests on the bearing.

This invention was made by focusing on the above-mentioned problems faced when using ball bearings for this rolling bearing.
The aim is to propose a new device that solves bearing processing problems.

[Means to solve the problem]

In the present invention, on the outer periphery of the support that rests on the ball bearing,
By arranging the guide block integrally and providing a clearance of the same degree as the diameter of the ball bearing between the outer peripheral surface of the support and the inner peripheral surface of the guide block, the device can be connected to the support and the receiving plate on which the ball bearing rests. This structure solves the ball bearing processing problem by having a structure in which the ball bearing wraps around and circulates within the clearance during relative movement.

When the support moves relative to each other, the ball bearing is scooped up by the lower end of the guide block and enters the clearance, and circulates around the support in the direction of movement depending on the amount of movement of the support.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below as an embodiment based on drawings showing a seismic isolation floor.

First, the invention described in the first claim will be explained.

As shown in Fig. 1, the seismic isolation device A of the present invention supports the vertical load of an upper structure B, and is fixed in a horizontal plane on a support 1 whose bottom surface is horizontal and on a lower structure (framework) B2. a large number of ball bearings 3 interposed between the bottom surface of the support 1 and the top surface of the support 2, and a guide block 4 disposed on the outer peripheral surface of the support 1 and integrated with the support 1. The supporting body 1 rolls on the ball bearing 3 to insulate the horizontal vibration of the lower structure B.

The saucer 2 is made of a smooth and hard material, and the lower structure B
It is glued onto a leveling material 5 made of special mortar, which is laid to level the unevenness of the top end surface of 2.

A large number of ball bearings 3 are inserted between a support 1 and a support 2 installed on this tray 2, and a guide block 4 is fixed with a clearance C provided around the support 1.

As shown in FIGS. 1 and 2, the clearance C is approximately the same size as the diameter of the ball bearing 3, and is provided around the outer periphery of the support 1.

In addition, the lower end of the guide block 4 is separated from the upper surface of the tray 2 with a slight gap, and its inner peripheral surface has a shape that follows the outer peripheral surface of the support 1. Ball bearing 3 at the bottom end
The structure is such that the material is scooped up into Clearance C.

A dust cover 6 is placed over the saucer 2 to prevent dust and rust, and a felt seal 7 is glued around the periphery.

In the case of the illustrated embodiment (seismic isolation floor), the upper structure B includes a girder 8 that is constructed at a distance from the lower structure B2, and a floor panel 10 that is supported by support legs 9 and laid on top of the girder 8. The vertical load of the upper structure B is carried out by a seat plate 12 that receives the bracket 11 connected to the girder 8, and a spherical plate that rests on the support 1 and absorbs the installation error of the tray 2 and the deformation of the girder 8. It is transmitted to the support body 1 via a spherical seat 13 having a bottom surface and a bolt 14 that connects the two. FIG. 3 is a plan view of the bracket li in FIG. 1.

When the upper structure B moves relative to the lower structure B2,
As shown in Fig. 4, in this seismic isolation device A, the ball bearing 3 on the side opposite to the moving direction of the support 1 is scooped up by the guide block 4 and enters the clearance C, and then the outer peripheral surface of the support 1 and the guide block The vibration of the lower structure B2 is blocked by a mechanism in which the support member B2 travels between the inner circumferential surfaces of the lower structure B2, wraps around in the direction of movement, falls, and then interposes again between the support member 1 and the receiving tray 2.

As shown in the embodiment, the seismic isolation device C of the invention described in the second claim supports the vertical load of the upper structure B on the support l of the seismic isolation device A described in the first claim, and at the same time, A coil spring 15 that blocks vertical vibration of the lower structure B2 is installed with its axis vertical.

In the embodiment shown in FIG. 1, in addition to the coil spring 15, an oil damper 16 is installed to damp vertical vibration.
The coil spring 15 is installed between the seat plate 12 that directly supports the girder 8 and the spherical seat 13, or between the seat plate 17 to which the oil damper 16 is attached and the spherical seat 1 when the oil damper 16 is used together.
It is placed between 3.

The seat plate 17 is guided in vertical movement by a guide 18 fixed on the spherical seat 13, and moves simultaneously with the seat plate 12 by a bolt 14 passing therethrough.

This seismic isolation device C exhibits the same behavior as the seismic isolation device A when the lower structure B□ is horizontally displaced, and when the lower structure B2 is vertically displaced, the coil spring 15 absorbs the vertical vibration, and the oil damper 16 is a mechanism for damping vibrations.

FIG. 5 shows an embodiment in which the oil damper 16 is not used. In this case, the coil spring 15 is connected to the seat plate 1.
The seat plate 12 is installed between the spherical catch 1 and the spherical catch 1.
3 guides 18. 19 in the figure is the upper structure B.

This shows a stopper for relative horizontal movement.

〔Effect of the invention〕

This invention is as described above, and the ball bearing on the support body moves and circulates when the upper structure moves relative to each other due to the clearance provided between the support body and the guide block, so that the ball bearing is always attached to the support body. interposed between the support plate and the support plate, and the stable support state of the support body is maintained.
The insulation effect of the ball bearing can be fully demonstrated.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of the present invention, Fig. 2, Fig. 3
The figures are a plan view of the ball bearing section and the bracket section, respectively, FIG. 4 is a sectional view showing the movement of the ball bearing, and FIG. 5 is a sectional view showing another embodiment. A...Seismic isolation device, B,...Upper structure, B2...Lower structure, ■...Support, 2...Saucer, 3...Ball bearing, 4...Guide block, 5...Leveling material , C...Clearance, 6...Dust cover 7...Felt seal, 8...Main beam, 9...Support leg, 10...Floor panel, 11...Bracket, 12...Seat plate, 13...
Spherical catch, 14...Bolt, C...Seismic isolation and vibration isolation device, 15
...Coil spring, 16..Oil damper, 17..Seat plate, 18..Guide, 19..Stopper.

Claims (2)

[Claims] (1) A support with a horizontal bottom that supports the vertical load of the upper structure, a saucer fixed to the lower structure in a horizontal plane, and a large number of supports that are interposed between the bottom of the support and the saucer. It consists of a spherical ball bearing and a guide block that is placed around the outer periphery of the support and is integrated with the support.
A ball bearing rotates between the outer peripheral surface of the support and the inner peripheral surface of the guide block when the support moves relative to the receiving plate.
A seismic isolation device that allows circulation and is characterized by having a clearance around the same extent as the diameter of a ball bearing. (2) A coil spring that supports the vertical load of the upper structure and at the same time blocks vertical vibrations of the lower structure is installed with its axis vertical on the upper part of the support of the seismic isolation device according to the first claim. A seismic isolation and vibration isolation device characterized by: