JPH04136543A - Vibration proofing device - 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] [Field of Industrial Application] The present invention relates to a vibration isolating device, and more specifically, the present invention relates to a vibration isolating device, and more specifically, the present invention relates to a vibration isolating device. In order to prevent equipment such as computers and precision measuring equipment installed in the building from vibrating and stopping functioning or overturning, vibrations are transmitted through the floor of the building. The present invention relates to a vibration isolating device that insulates the vibrations and protects equipment from vibrations by swingably supporting an upper structure such as a floor on which the upper structure is placed on a lower structure such as a slab.

[Conventional technology]

By supporting a superstructure such as a floor on which computers, precision measuring instruments, and other equipment are mounted so that it can swing freely on a substructure such as a slab, traffic vibrations around the building and vibrations inside the building can be reduced. There is a bearing-type vibration isolator that protects equipment from vibrations by insulating vibrations generated from equipment in other rooms or vibrations caused by earthquakes.

As this bearing type vibration isolator, Japanese Patent Application Laid-open No. 54-
There is one disclosed in Publication No. 45303. This vibration isolator has a structure in which a plurality of rollers are stacked in two layers, arranged in parallel and perpendicular to each other, and attempts to absorb vibrations in the horizontal direction by shifting the rollers.

Additionally, the present applicant previously filed an application for a vibration isolating device disclosed in Japanese Patent Application No. 2-10910. This vibration isolator has a plurality of rollers sandwiched in parallel between an upper structure and a lower structure to support the upper structure so that it can swing freely in the horizontal direction, and an elastomer is placed on the rolling surface of the rollers. It has a structure that absorbs horizontal vibrations due to the rolling of the rollers, and also attempts to absorb vertical vibrations through local elastic deformation of the elastomer that forms the rolling surface when the rollers roll. It is something.

[Problem to be solved by the invention]

By the way, as mentioned above, the vibration isolating device disclosed in Japanese Patent Application Laid-Open No. 54-45303 has a structure in which rollers made of rigid bodies such as metal are arranged in parallel and stacked in upper and lower layers, orthogonal to each other. , it is possible to absorb the horizontal component of vibration, but it is not possible to absorb the vertical component of the vibration.Also, since the roller is made of a rigid body such as metal, the contact area of the roller with the transfer surface is small. The surface pressure at the contact point is extremely low, and the rollers and transfer surfaces are likely to be damaged when subjected to strong vibrations during an earthquake. Furthermore, during construction, the external dimensions of the roller and the parallelism of the transfer surface must be accurate, and if these are inaccurate, looseness may occur.

Therefore, in order to solve the problem caused by the roller being made of a rigid body, the vibration isolating device disclosed in Japanese Patent Application No. 2-10910, which was previously filed by the present applicant, is designed to prevent the vibration between the upper and lower structures. Because it has a structure in which elastomer is placed on the transfer surface of multiple rollers sandwiched between the rollers, it can absorb the vertical component of slight vibrations such as traffic vibrations, but it cannot absorb the vertical components of large vibrations such as earthquakes. was difficult.

Therefore, the present invention has been proposed in view of the above-mentioned problems, and its purpose is to provide a vibration damping system that can absorb vertical components of vibrations such as traffic vibrations and earthquakes, regardless of their size, with a simple structure. The goal is to provide equipment.

[Means to solve the problem]

The technical means for achieving the above object of the present invention is to sandwich a plurality of rollers in parallel between the upper structure and the lower structure to support the upper structure in a horizontally swingable manner. In this case, an air spring or a coil spring is arranged in the vertical direction of the roller.

[Effect]

In the vibration isolating device according to the present invention, air springs or coil springs are arranged in the vertical direction of the plurality of rollers sandwiched between the upper and lower structures. It can reliably absorb not only minute vibrations such as vibrations from equipment in rooms, but also vertical components of large vibrations such as those caused by earthquakes.

Furthermore, when the air spring is used, the horizontal level of the upper structure can be adjusted by adjusting its internal air pressure.

〔Example〕

Embodiments of the vibration isolator according to the present invention will be described with reference to FIGS. 1 to 7.

The vibration isolator (1) of the embodiment shown in FIG. It is installed between a certain lower structure (3).

In this vibration isolator (]), (4) is an upper pressure plate such as a steel plate, and a sheet-like elastomer (5) is attached to the lower surface of the upper pressure plate by vulcanization adhesive or the like.

(6) is a lower pressure plate such as a steel plate fixed to the upper surface of the lower structure (3) facing the upper pressure plate (4), and like the upper pressure plate (4), a sheet-like elastomer (
7) is attached using vulcanization adhesive or the like. The material of the elastomers (5) and (7) may be any material as long as it has elasticity.
For example, various rubber materials or plastics. (8)
...(9) ... is the upper pressure plate (4) and the lower pressure plate (
6) (hereinafter referred to as upper and lower rollers), the plurality of upper rollers (8)... and lower rollers (9)... are each connected to a connecting plate (10).
(11), they are rotatably supported in parallel and stacked in two stages at an angle of 90 degrees to each other. The materials of the upper and lower rollers (8), (9), etc. may be any material that can withstand vertical loads, such as metal, concrete, ceramics, hard plastic, and FRP. (12) is an intermediate pressure-resistant plate such as a rope plate interposed between the upper roller (8)... and the lower roller (9)... and a sheet-like elastomer (13) on its upper and lower surfaces.
(14) is attached by vulcanization adhesive or the like. The upper and lower rollers (8)...(9)... are connected to the upper pressure plate (4).
) and the intermediate pressure plate (12), and the elastomer (5) between the intermediate pressure plate (12) and the lower pressure plate #l1 (6).
(13) and (14) is squeezed via (7),
The elastomer (5) (13) and (14) (7
), the surfaces that come into contact with the upper and lower rollers (8)...(9)... serve as transfer surfaces. In addition, the upper, lower, and middle pressure plates (
4) Instead of pasting the sheet-like elastomer (5) (7) (13) (14) on (6) (12), the upper and lower rollers (8)...(9)... themselves or their The surface may be made of elastomer. Moreover, these elastomers are not necessarily required. (15) is the upper and lower roller (8)...(
9) An air spring, which is a feature of the present invention, is arranged vertically above the upper structure, and its upper end is on the lower surface of the upper structure (2).
Their lower ends are respectively fixed to the upper surface of the upper pressure plate (4),
Air is sealed inside at a desired pressure.

(Step 6) is a restoring elastic body provided between the peripheral edges of the upper and lower pressure plates (4) and (6) in order to exhibit the return-to-origin performance, and is made of a rubber body or a coil spring. When used, it can also be installed horizontally. Further, in order to exhibit damping performance, various dampers that absorb vibration energy may be provided, or high damping rubber may be used for the above-mentioned restoring elastic body (16) made of a rubber body. Furthermore, although not shown, upper and lower rollers (8)...
A stopper for regulating the rolling distance of (9)... and a cover for preventing foreign matter from entering the rolling surfaces of the upper and lower rollers (8)...(9)... may be provided. , the above-mentioned stoppers may be provided at positions facing the upper and lower rollers (8)...(9)...of the upper and lower parts and intermediate pressure plates (4), (6), and (12) along the rolling direction. In addition, the cover has upper and lower and intermediate pressure plates (4) (6) surrounding the gaps that house the upper and lower rollers (8)...(9)...
(12). In this embodiment, upper rollers (8)... and lower rollers (9)...
Although the rollers are stacked in two stages at an angle of 0', the rollers may be stacked in three or more stages with each stage forming a predetermined angle.

In the vibration isolator with the above configuration, the rolling surfaces of the upper and lower rollers (8)...(9)... It is absorbed by the elastic deformation of the formed elastomer (5), (13), (14), and (7), and the vertical component of large vibrations such as those caused by earthquakes is absorbed by the deformation of the air spring (15). In addition, for the horizontal components of the above-mentioned fine vibrations such as traffic vibrations and large vibrations such as earthquakes, the elastomer (5) of the upper and lower and intermediate pressure plates (4), (6), and (12)
(7) It is absorbed by the upper and lower rollers (8)...(9)... transferring on the transfer surfaces formed in (13) and (14). In addition, the upper and lower rollers (8)...(
9) When rolling, elastomer (5) (7)
(13) The elastic deformation of (14) generates rolling resistance and exhibits damping performance. In this way, vertical and horizontal three-dimensional vibrations of the lower structure (3) caused by traffic vibrations and earthquakes are insulated, and the upper structure (2) is held stationary.

Figures 2 and 3 show an example of floor vibration isolation in which the above-mentioned vibration isolator (1) is applied to a part of a building. ) The planar arrangement pattern of the plurality of vibration isolators (1) (1)... provided between the slab is the same as the arrangement ( The design is based on the vertical load distribution based on the position of the center of gravity).

In this floor vibration isolation, in order to supply compressed air to the air springs (15) (15)... of each vibration isolator (1) (1)..., the compressed air supply source (17) and the compressed air Piping (19) extending from the supply source (17) to each vibration isolator (1) (1) via the pressure reducing valve (1B) (1B)...
(19)... is provided.

As a result, if the vertical load distribution changes due to movement of equipment placement (center of gravity position), or if the vertical load distribution is slightly different from what was expected before the equipment was installed, the upper structure (2) The horizontal level of the shaking bed can be adjusted. That is, by adjusting the pressure reducing valve (1B) (18)...
Piping (19) from compressed air supply source (17) (19)
The compressed air pressure supplied to each vibration isolator (1), (1), etc. via... is adjusted. Each vibration isolator (1) (1)・
..., the compressed air pressure in the internal space of the air spring (15) (15) ... is increased or decreased, and the air spring (1
5) The height of (15)... is controlled and the horizontal level of the vibration-proof floor is adjusted.

In the above embodiment, an air spring (15) was used to absorb the vertical component of large vibrations such as those caused by earthquakes, but instead of this air spring (15), a coil spring (
20) may also be used. Note that the same parts as the anti-vibration bag f(1) of the embodiment shown in FIG.

The vibration isolator (1) of the embodiment shown in FIG. 4 has coil springs (2
0) is placed. Specifically, a plurality of vertical coil springs (22) (22)... are installed between the mounting plate (21) fixed to the lower surface of the upper structure (2) and the upper pressure plate (4). . A pair of links (24) (24) consisting of two levers (23) (23) are disposed facing each other between the edge portions of the mounting plate (21) and the upper pressure plate (4). Lever (23) (23) of link (24) (24)
) A horizontal coil spring (26) is stretched between the intermediate pivot parts (25) and (25). Although the figure shows a case in which one horizontal coil spring (26) is provided, two or more horizontal coil springs may be provided in tension, or the vertical coil spring (22) and the horizontal coil The springs (26) do not necessarily have to be used together, and one of them may be used alone.

In the vibration isolator (1), when a large vibration such as an earthquake is input in the Y direction in the figure, the vertical coil spring (22
) (22) ... contracts and a restoring force acts in the opposite direction to the direction of contraction, and this vertical coil spring (22)
Links (24) (24) due to contraction of (22)...
) bends, the horizontal coil spring (26) expands, and a restoring force acts in the opposite direction to the direction of expansion. Also, when large vibrations such as earthquakes are input in the -Y direction, the vertical coil springs (22) (22)... expand and the horizontal coil springs (26) contract, causing the vertical and horizontal coil springs ( 22) Restoring force acts on (22)...(26). In this way, vertical coil springs (22) (22)...
・It is absorbed by the elastic deformation of the horizontal coil spring (26). In addition, regarding horizontal components of large vibrations such as earthquakes, and vertical and horizontal components of minute vibrations such as traffic vibrations,
Since it is the same as the embodiment shown in the figure, the explanation will be omitted.

Next, modified examples of the present invention are shown in FIGS. 5 to 7.

First, in the vibration isolator (1) shown in FIG.
5) to absorb the vertical component of large vibrations such as those caused by earthquakes. By the way, traffic vibrations and earthquake motions include torsional motions that include rotational components in addition to horizontal and vertical components.

When vibrations that include rotational components occur, the air spring (15) can absorb minute vibrations that include rotational components; becomes difficult.

Therefore, the vibration isolator (1) shown in FIGS.
This is the embodiment shown in the figure with the addition of means capable of absorbing vibrations containing rotational components. Note that the same parts as in FIG. 1 are given the same reference numerals, and redundant explanation will be omitted.

This vibration isolator (1) includes a plurality of tapered rollers (27).
(27) are arranged radially in a horizontal plane, and are placed vertically above the upper rollers (8), that is, between the upper pressure plate (4) and the upper rollers (8). intervene. At this time, unlike the case of the embodiment shown in FIG. 1, the elastomer (5) is not required on the lower surface of the upper pressure plate (4).
An intermediate pressure plate (28) is interposed between the intermediate pressure plate (28) and an elastomer (29) is attached to the lower surface thereof by vulcanization adhesive or the like. Furthermore, the lower surface of the upper pressure plate (4) and the intermediate pressure plate (28)
A conical pressure plate (30) (31) is installed on the top surface of the elastomer (32) (33
) is pasted with vulcanization adhesive etc. and the roller (27)...
Forms the rolling surface of the In addition, the above-mentioned pressure plate (30)
(31) may be provided separately or integrally with the upper pressure plate (4) and the intermediate pressure plate (28), and the rollers (27) and
... are rotatably supported in a radially arranged state by a large-diameter ring-shaped connecting plate (34) and a small-diameter ring-shaped connecting plate (35) that are specifically arranged concentrically. In addition, in the vibration isolator (1), the fourth air spring (15) is used instead of the air spring (15).
Of course, it is possible to use the coil spring (20) shown in the figure.

In the above-mentioned vibration isolator (1), when a vibration such as a torsional motion that includes a rotational component in the horizontal and vertical components of a large vibration such as an earthquake is input, the rollers (27) (27)... This roller (
27) (27) It absorbs vibrations such as torsional motion containing rotational components by transferring in the rotational direction. This provides excellent vibration isolation performance against all types of vibrations with horizontal, vertical, and rotational components, absorbing not only small vibrations such as traffic vibrations, but also large vibrations such as earthquakes.

In each of the embodiments described above, the air spring (15) or the coil spring (20) was used to absorb the vertical component of large vibrations such as those caused by earthquakes, but the present invention is not limited to this. Any structure other than an air spring or a coil spring that can absorb the vertical component of large vibrations may be used. Furthermore, it goes without saying that the present invention is applicable to vibration isolation structures other than floor vibration isolation.

〔Effect of the invention〕

According to the vibration isolating device of the present invention, since air springs or coil springs are arranged in the vertical direction of the roller, not only slight vibrations such as traffic vibrations and vibrations generated from equipment in other rooms, but also large vibrations such as earthquakes can be avoided. It is possible to provide a vibration isolating device that can quickly absorb horizontal and vertical components of vibration and exhibits excellent vibration damping performance with a simple structure. Further, when an air spring is used, the horizontal level of the upper structure can be easily adjusted by adjusting the internal air pressure, and its practical value is great.

[Brief explanation of the drawing]

Figures 1 to 7 are for explaining the present invention in detail, and Figure 1 is a vibration isolator using an air spring! A front view showing
Figure 2 is a sectional view showing a construction example in which the vibration isolator shown in Figure 1 is applied to floor vibration isolation, Figure 3 is a plan view of Figure 2, and Figure 4 is a vibration isolator using a coil spring. A front view, FIG. 5 is a front view showing a vibration isolator in which a means for absorbing vibrations including rotational components is added to the embodiment shown in FIG. 1, and FIG. 6 is a cross section taken along line I-1 in FIG. 5. FIG. 7 is a cross-sectional view along the line ■-■ in FIG. 6, including a partially omitted portion. (1) - Vibration isolator, (2) - Upper structure,
(3) - Lower structure, (8) (9) - Roller, (15) - Air spring, (2o) - Coil spring. Figure 1

Claims (1)

[Claims] (1) In a structure in which a plurality of rollers are sandwiched in parallel between the upper structure and the lower structure to support the upper structure so as to be able to swing freely in the horizontal direction, air springs or A vibration isolating device characterized by having a coil spring or the like arranged therein.