JPH03183864A - Vibration isolator - Google Patents

Abstract

PURPOSE:To increase vibration isolating effect in the horizontal direction by supporting a section between a lower floor and an upper floor, with a plurality of bearing members, and by providing the bearing members, with sliding plates moving in the horizontal direction, and spring members, thereby constituting a vibration isolating mechanism. CONSTITUTION:A vibration isolated floor is formed to be a double mechanism supported with a vibration isolating mechanisms 10 as a bearing member at a section between a lower floor 1 and an upper floor 2. Then, the vibration isolating mechanisms 10 on the lower floor 1 is formed with sliding plates 14 for sliding and bearing movably in the horizontal direction, and spring members 16 which spring in the same horizontal direction, into a vibration isolating mechanisms for suppressing horizontal vibration, and is mounted on bases 13 via plates formed of the material of low friction resistance on the sliding plates 14. Besides, on sections between the sliding plates 14 and the bearing members 10, coat layers formed of polymer of low frictional property are fitted. As a result. As a result, the upper surfaces of the sliding plates 14 are set to be the low-friction coat layers, sliding friction is reduced, and vibration isolating effect can be exhibited.

Description

Detailed Description of the Invention (Industrial Application Field) This invention provides a double floor structure that is interposed between an upper floor and a lower floor constituting a room in which precision equipment such as computers is installed.
This invention relates to a vibration isolation device for isolating the upper floor from vibrations such as earthquakes and protecting installed equipment from vibrations.

(Prior Art) In general, the floors of so-called computer rooms where computers and other equipment are installed are constructed with an upper floor 2 above the floor 1 of the building itself, as shown in Figures 1 to 5. It has a double floor structure, and a plurality of vibration isolation devices 10 are arranged on the floor surface 1 to support the upper floor 2, and the vibration isolation devices 10 are arranged on the floor surface 1 to support the upper floor 2.
The structure is constructed with a vibration-isolating floor that can isolate the upper floor 2 from vibrations such as earthquakes. The vibration isolation device 1o shown in the same figure is
This is similar to the one previously disclosed by the applicant in Japanese Utility Model Publication No. 57-25942. This vibration isolator 10 has a vertical spring 11 to create a long-period vibration system with respect to vertical vibration, and produces a vibration isolation effect by greatly deviating from the natural period of the building. A hydraulic damper 12 is provided vertically as a damping system to damp vertical vibrations. On the other hand, for horizontal vibration, a horizontal spring 16 is provided, and a base 13 that constitutes the base of the damped vibration system for vertical vibration, a sliding plate 14 fixed to the floor 1, and a Vibration isolation is achieved by attenuating horizontal vibrations with plate members 15 made of a low-friction material arranged at intervals.

In addition, in this vibration isolation device 10, the load of the upper floor 2 is received by the main body cover 17, and 9 of the load supported by the main body cover 17 is
0% to the vertical spring 11, remaining 10% to the main body cover 17
The shaft 18 disposed at the center of the inside of the shaft 18 is provided with a stopper 19, and at this time, the stopper 19 is inserted in a tensioned state by a pull-out spring 20. Then, when the stopper 19 comes off due to the tensile force of the pull-out spring 20 due to vertical vibrations caused by an earthquake or the like, the support of the main body cover 17 is transferred to elastic suspension by the vertical spring 11, and a vibration isolation effect is exhibited.

(Problems to be Solved by the Invention) However, in the vibration isolation device 10 described above, the vibration isolation effect is not exhibited unless the vibration energy is greater than a certain level so that the extraction spring 20 can be operated. There was a desire to make this function even when the vibration energy is small, such as in the case of small earthquakes.

Here, regarding the damped vibration system of vertical vibration, vertical spring 1
1 and the hydraulic damper 12 appropriately, it is possible to cope with low-energy vibrations, but the damped vibration system for horizontal vibrations is
Since it is a system based on sliding friction, it was not easy to set up, and some kind of ingenuity was required.

This invention was made in view of the above background, and an object thereof is to provide a vibration isolator that can exhibit a vibration isolation effect even with small vibration energy for a horizontal vibration damping vibration system. shall be.

(Means for Solving the Problems) In order to achieve the above object, the present invention forms a double floor structure by supporting the upper floor at intervals in the height direction using supporting members provided on the lower floor. Between the floor and the supporting member, there is a sliding plate that slides and supports the supporting member horizontally on the lower floor, and a resilient member that bounces the supporting member horizontally against the lower floor, so that the upper floor is horizontal. The present invention is characterized in that a vibration isolation mechanism is provided to isolate vibrations, and a coating layer made of a low-friction polymer material is interposed between the sliding plate and the support member.

Furthermore, a low-friction lubricating film material may be interposed between the coating layer and the support member.

Further, the present invention forms a double floor structure by supporting the upper floor at intervals in the height direction with support members provided on the lower floor, and the support member is placed on the lower floor between the lower floor and the support member. A vibration isolation mechanism is provided to isolate the horizontal vibration of the upper floor by having a slide plate that slides and supports the slide plate so as to be movable in the horizontal direction, and a resilient member that bounces the support member horizontally against the lower floor. It is characterized by being made of ultra-high molecular weight material.

(Function) With the above configuration, the upper surface of the sliding plate becomes a low-friction coating layer, which reduces sliding friction, so that the damped vibration system for horizontal vibration can also cope with low-energy vibrations.

Furthermore, by interposing a low-friction lubricating film, sliding friction is further reduced, making it possible to cope with lower-energy vibrations.

On the other hand, since sliding friction is reduced by forming the sliding plate from an ultra-high molecular weight material, the damped vibration system for horizontal vibration can also cope with low-energy vibrations.

(Embodiments) Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a partially cutaway perspective view showing a vibration isolation floor to which the present invention is applied. 2 is a partially cutaway perspective view of the vibration isolation device shown in FIG. 1, and FIG. 3 is a plan view of the vibration isolation device. 4 is a sectional view taken along the line IV-IV in FIG. 3, and FIG. 5 is an enlarged plan view showing the portion indicated by the arrow V in FIG. 3.

Basically, the present invention forms a double floor structure by supporting an upper floor 2 at intervals in the height direction with supporting members 10 provided on a lower floor 1, and connecting the lower floor 1 and the supporting members 10. In between, there is provided a sliding plate 14 for slidingly supporting the supporting member 10 on the lower floor 1 so as to be movable in the horizontal direction, and a springing member 6 for repelling the supporting member 10 in the horizontal direction against the lower floor 1. A vibration isolation mechanism is provided to isolate the horizontal vibration of the upper floor 2, and a sliding plate 14 and a support member 10 are provided.
A coating layer 30 made of a low-friction polymer material is interposed between the two. Further, a low-friction lubricating film material 31 may be interposed between the coating layer 30 and the support member 10.

A floor surface 1, which is a lower floor shown in FIG. They are placed at appropriate intervals. The vibration isolation device 10 in this embodiment has a stainless steel sliding plate 14 fixed on the floor surface 1,
The base 13 is slidably placed on the sliding plate 14 via a plate 15 (shown in FIG. 4) made of a material with low frictional resistance.

As shown in FIGS. 2 and 4, a vertical spring 11 with a period longer than the natural period of the building is disposed on the upper surface of the base 13, and the upper end of this vertical spring 11 surrounds the vertical spring 11. A presser plate 2 arranged inside the cylindrical main body cover 17
1, and the distance between the presser plate 21 and the top plate 22 of the main body cover 17 is kept constant by a spring force adjustment screw 23 screwed through the top plate 22. That is, the main body cover 17 is elastically suspended by the vertical spring 11 and can move up and down relative to the base 13 on the floor 1 side according to the expansion and contraction of the vertical spring 11. The pressing force is adjusted by an adjustment screw 23.

Further, hydraulic dampers 12 are arranged outside the main body cover 17, and these hydraulic dampers 12 are attached to the outer peripheral surface of the main body cover 17 at the upper end and to the base 13 at the lower end, respectively.
This damps the vertical movement of the main body cover 17.

The base 13 further includes a horizontal spring 1 provided in the horizontal direction.
One end of the horizontal spring 16 is fixed to the floor surface 1, and the other end of the horizontal spring 16 is fixed to the floor surface 1. A plurality of horizontal springs 16 are provided at equal intervals (in the illustrated example, four at 90° intervals).

The lower end of a shaft 18 is fixed approximately at the center of the base 13, the shaft 18 extends upward through the presser plate 21 and the top plate 22, and a regulating means 25 is provided at its upper end.

The regulating means 25 includes a disk-shaped stopper 19 placed on the upper end surface of the shaft 18, and one of the stoppers is attached to the top plate 2.
It is pulled by a pull-out spring 20 whose one end is attached to a locking rod 26 fixed to the holder 2 . The regulating means 25 further includes:
It has a side plate 27 that fixes it to the top plate 22, and a holding member 28 that clamps the stopper 19 with the upper end surface of the shaft 18 by frictional force, as shown most clearly in FIG. , a planar U-shaped notch 2 is provided on the front surface of the presser member 28.
is formed. When one stopper is in the clamping state shown, the main body cover 17 is held by the holding member 2.
8. Base 13 via stopper 17 and shaft 18
are integrally connected to.

On the other hand, when the distance between the holding member 28 and the upper end surface of the shaft 18 increases as the shaft 18 moves up and down together with the base 13 during an earthquake, one stopper overcomes the friction and is pulled away from the holding member 28 by the pull-out spring 20. Remove the main body cover 1
7 and the shaft 18 is released, the main body cover 17 shifts to elastic suspension by the vertical spring 11 described above.

Now, in the vibration isolation device 10 described above, a coating layer 30 of a low-friction polymeric material is provided on the upper surface of the sliding plate 14. Furthermore, a low-friction lubricating film material 31 may be interposed between the sliding plate 14 and the plate 15 on which the coating layer 30 is provided, and overlaid on the upper surface of the coating layer 30. Note that, as the coat layer 30, for example, fluororesin, polyethylene, or the like is used.

Therefore, according to such a configuration, since the upper surface of the sliding plate 14 is the low-friction coating layer 3o, the sliding friction is reduced, so that the above-described horizontal vibration damping vibration system can also cope with low-energy vibrations. becomes.

Furthermore, by interposing the low-friction lubricating film material 31, sliding friction is further reduced, making it possible to cope with lower-energy vibrations.

Furthermore, the sliding plate 14 itself may be formed of an ultra-high molecular weight material.

That is, according to the above configuration, it is possible to reduce the vibration energy at which the vibration isolation effect is exhibited in the damped vibration system of horizontal vibration.

Note that Table 1 is a table of types of performance confirmation tests conducted to determine the configuration according to the present invention. Table 2 is a performance comparison between the configuration of the present invention and the conventional configuration, and FIG. 6 is a graph showing Table 2.

Table 1 Table 2 This configuration was determined by performing performance confirmation tests on various types and various combinations of sliding bearings for the base 13 as shown in Table 1.

In this embodiment, as shown in Table 2 and FIG. 6, the vibration energy at which the vibration isolation effect is exerted is reduced to about half in terms of acceleration compared to the conventional structure.

In the performance confirmation test, seven types of friction materials forming the plate 15 were used in combination, including polyacetal resin type and Teflon resin type.

(Effects of the Invention) As explained in detail in the embodiments above, according to the vibration isolator according to the present invention, the upper surface of the sliding plate is coated with a low-friction coating layer, or the eye of the sliding plate is made of an ultra-high molecular weight material. Since this reduces sliding friction, the horizontal vibration damping vibration system can also handle low-energy vibrations, and by interposing a low-friction lubricating film material, sliding friction can be further reduced. In other words, in the horizontal vibration damping system, the vibration energy at which the vibration isolation effect is exerted can be reduced.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view showing a vibration isolation floor to which the present invention is applied, FIG. 2 is a partially cutaway perspective view of the vibration isolation device shown in FIG. 1,
Figure 3 is a plan view of the vibration isolator, and Figure 4 is an illustration of Figure 3.
-IV is a sectional view taken along arrow V, FIG. 5 is a plan view showing an enlarged portion of arrow V in FIG. 3, and FIG. 6 is a graph for explaining Table 2. 1... Lower floor (floor surface) 2... Upper floor 10... Support member (vibration isolation device) 14... Sliding plate 1
6... Resilient member 30... Coat layer 31
...Lubricating film material

Claims (3)

[Claims] (1) A double floor structure is formed by supporting the upper floor at intervals in the height direction with support members provided on the lower floor, and between the lower floor and the supporting member, the support member is placed on the lower floor. A vibration isolation mechanism is provided to isolate horizontal vibrations of the upper floor by having a sliding plate that slides and supports the member so as to be movable in the horizontal direction, and a resilient member that bounces the support member horizontally against the lower floor. In addition, a vibration isolation device characterized in that a coating layer made of a low-friction polymer material is interposed between the sliding plate and the supporting member. (2) The vibration isolation device according to claim 1, further comprising a low-friction lubricating film material interposed between the coating layer and the support member. (3) The upper floor is supported at intervals in the height direction by support members provided on the lower floor to form a double floor structure, and the support member is provided on the lower floor between the lower floor and the support member. A vibration isolation mechanism is provided to isolate horizontal vibrations of the upper floor by having a sliding plate that slides and supports the member so as to be movable in the horizontal direction, and a resilient member that bounces the support member horizontally against the lower floor. Also, a vibration isolation device characterized in that the sliding plate is made of an ultra-high molecular weight material.