JPH04107339A - Vibrationproof device - Google Patents

Abstract

PURPOSE:To display excellent vibrationproof performance by a simple structure so as to facilitate work execution and maintenance by providing rollers at up and down positions in the orthogonal condition by facing back projection curved faces of a pair of roller segments, and providing a rail which has rolling face of the roller at up and down positions. CONSTITUTION:A support body 4 has the structure in which a pair of roller segments 7, 8 are arranged at up and down positions and the roller segments 7, 8 in the upper and lower sections are connected by a column-shaped vibration-proof rubber body 9. The roller segment 7 in the upper section faces a plural number of rollers 10, 10... upward, arranges them in a row in parallel in X direction so that they form projection curved face, and supports them on a support frame 11 in such a way that they can rotate freely. The roller segment 8 in the lower section faces a plural number of rollers 12, 12... downward, arranges them in a row in parallel in Y direction so that they form projection curved face, and supports them on a support frame 13 in such a way that they can rotate freely. The integrated support body 4 which can tilt mutually is constituted by bonding the vibrationproof rubber body 9 on the bottom face of each of support frames 11, 13 by vulcanization bonding in the condition where mutual rollers 10..., 12... of each of roller segments 7, 8 are orthogonal.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vibration isolating device, and more specifically, the present invention relates to a vibration isolating device, and more specifically, it is used to convert superstructures such as floors on which equipment such as computers, precision measuring instruments, and precision processing instruments are mounted, into slabs. The equipment is supported horizontally and vertically on a substructure such as a substructure that can be moved horizontally and vertically to prevent equipment from stopping, overturning, or breaking electrical wiring due to traffic vibrations or earthquakes. The present invention relates to a vibration isolator that protects the user from vibrations.

[Conventional technology]

Vibration isolators are used to protect computers, precision measuring instruments, precision processing instruments, and other equipment from traffic vibrations and earthquake motions.
For example, there are those shown in i to iii below.

i. The invention disclosed in Japanese Patent Application Laid-Open No. 64-69842 combines a rolling ball, a restoring spring, a viscous damper, and a laminated rubber structure, and absorbs micron-order vibrations such as environmental vibrations with the laminated rubber structure. This is a vibration isolator that uses rolling balls and restoring springs to absorb large shaking during earthquakes.

ii. The invention disclosed in JP-A-2-35140 combines a sphere and a restoring spring, and forms an elastic (viscoelastic) coating layer on the lower surface of the sphere or the upper structure, and the upper surface of the lower structure. This is a vibration isolator that improves the fit between the upper and lower surfaces of ball bearings and eliminates noise generation.

iii. The invention disclosed in Japanese Unexamined Patent Publication No. 56-46042 combines a sphere and two curved disk bodies, and by interposing the sphere between the curved disk bodies, it comes into contact with the concave curved surface of the curved disk bodies. This is a vibration isolator that absorbs vibrations by moving spheres.

[Problem to be solved by the invention]

By the way, the various vibration isolators described in 1-ji mentioned above have the following problems.

i. The vibration isolating device disclosed in Japanese Patent Application Laid-open No. 64-69842 does not have a damping effect on the movement of the rolling ball, so some form of damper must be installed separately. In addition, since the rolling ball can move freely in all directions, some means of determining the neutral position of the rolling ball and a restoring spring to return the rolling ball to the neutral position are essential. It's coming. Furthermore, if the processing accuracy of the rolling balls or the construction condition of the rolling surfaces is poor, the plurality of rolling balls will not be able to receive the load evenly, and in some cases, looseness may occur.

ii. Even with the vibration isolating device disclosed in Japanese Unexamined Patent Publication No. 2-35140, a restoring spring must be provided in order to return the rolling ball to the neutral position. Furthermore, when a sphere receives a large load from a building or the like, the pressure-receiving surface becomes spotty, causing large distortions on the pressure-receiving surface and causing problems such as easy damage to the elastic (viscoelastic) coating layer.

iii. In the vibration isolating device disclosed in Japanese Patent Application Laid-Open No. 56-46042, the support height is increased by the transfer of the sphere between the curved disc bodies, and the potential energy is used to return it to its original position. However, in reality, when a building is supported at several locations, the spheres cannot receive the load evenly, resulting in overloads on the spheres, or gaps between the spheres and the curved body, making it difficult to maintain a stable vibration isolation effect. , and the damping effect is insufficient, requiring a separate damper to be installed.

The present invention has been proposed in view of the above problems, and an object of the present invention is to provide a practical vibration isolator that is easy to install and maintain.

[Means to solve the problem]

A technical means for achieving the above object of the present invention is to arrange a pair of roller segments in which a plurality of rollers are arranged parallel to each other so as to have a convex curved surface and pivoted, facing each other with their convex curved surfaces facing up and down. , and the rollers of each roller segment are arranged vertically so as to be tiltable relative to each other with the rollers orthogonal to each other,
Rails having concave rolling surfaces for receiving the rollers of each roller segment are arranged above and below each roller segment.

[Effect]

In the vibration isolating device according to the present invention, since the rollers of each roller segment can roll on the rolling surface of the rail in the X direction and the Y direction, the roller segment can move in all directions on the XY plane. At this time, since the rollers of the roller segments have a convex curved surface and are received by the concave curved rolling surface of the rail, the roller segments can be tilted relative to each other in all directions. Furthermore, by using a viscoelastic material on the rolling surface, vertical and horizontal minute vibrations can be insulated, and large horizontal vibrations can be minimized by the energy absorption effect that accompanies roller transfer. . As a result, when traffic vibrations or earthquake vibrations occur, vertical and horizontal vibrations are quickly absorbed, providing excellent vibration isolation.

[Example] An example of the vibration isolator according to the present invention will be described with reference to FIGS. 1 to 11.

The vibration isolator (1) of the embodiment shown in Figs. 1 to 4 consists of a slab (2) which is a lower structure, and an upper part on which equipment such as computers, precision measuring instruments, precision processing instruments, etc. are placed. It is installed between the structure and the vibration-proof floor (3).

This vibration isolator (1) consists of a support (4), which will be described later, and a pair of upper and lower rails (1) placed above and below the support (4) and attached to a vibration isolator floor (3) and a slab (2), respectively. 5,)
(6) (hereinafter referred to as the upper and lower rails).

The support (4) has a pair of roller segments (7) (
8) (hereinafter referred to as upper and lower roller segments) are arranged one above the other, and the upper roller segment (7) and the lower roller segment (8) are connected by a pillar-shaped vibration-proof rubber body (9). The upper roller segment (7) is a plurality of rollers (10) (10)... arranged in parallel in the X direction so as to form a convex curved surface facing upward and rotatably supported on a support frame (11). In contrast, the lower roller segment (8) has a plurality of rollers (12) (12)...
are arranged in parallel in the Y direction so as to form convex curved surfaces facing downward, and are rotatably supported on a support frame (13). In this way, the upper and lower roller segments +17) and (8) are turned backwards with their convex curved surfaces facing up and down, and the mutual rollers (10) of each roller segment (7) and (8)...
・(12)... are perpendicular to each support frame (11).
) By fixing the vibration-proof rubber body (9) to the bottom surface of (13) with vulcanization adhesive or the like, a mutually tiltable support body (4) is constructed.

Meanwhile, the upper and lower rails (5) (6) are connected to the rollers (10) of the upper and lower roller segments (7) (8)...
(12) Concave curved rolling surface (14) (1
5). Specifically, rail bases such as steel plates (
16) The viscoelastic body (18) (19) is integrally fixed to (17) by vulcanization adhesive etc.
8) The lower and upper surfaces of (19) are the rolling surfaces (14)
(15). The rolling surface (14) of the upper rail (5) is a convexly curved roller of the upper roller segment (7).
10) (10)
The rolling surface (15) of the lower rail (6) is in contact with the convexly curved rollers (12) (12) of the lower roller segment (8) and rolls. It forms a concave curved surface extending in the Y direction. Upper and lower rails (5) (6) rail penis (16) (17)
Both sides of the are bent into an L shape to form a viscoelastic body (1B).
Roller guides (20) (20) (21) protruding from both sides of (19) rolling surfaces (14) (15)
(21) is formed, and this roller guide (20) (
20) (21) Due to (21), the above rolling surface (14)
(15) Roller transferring above (10)...(12)
)... to regulate its position. In addition, the upper and lower rails (5
)(6) The rolling surfaces (14) and (15) may be formed by pasting a sheet member made of a viscoelastic material to a member having a concave curved surface shape, in addition to the structure described above. Also,
These rolling surfaces (14) and (15) are preferably formed of the above-mentioned viscoelastic material, but even without this viscoelastic material,
Moreover, it goes without saying that it may be made of other materials.

When actually using the vibration isolator (1) having the above configuration, the upper and lower rails (5) and (6) are connected to each rail base (16) and (17) to the lower surface of the vibration isolating floor (3) and the slab (2). ) is mounted by fixing it with screws or the like, and the support body (4) is interposed between the upper rail (5) and the lower rail (6). A construction example of floor vibration isolation in which this vibration isolator (1) in actual use is applied to a part of a building is shown in the fifth example.
As shown in the figure.

In this construction example, as described later, multiple vibration isolators (1) (1)...
The anti-vibration floor (3) can be supported only by Multiple vibration isolators E (
1) Even if (1)... is not strictly aligned in the XY force directions, there is no problem with the vibration damping performance. In addition, the above-mentioned vibration isolator (1) (1
)... are designed based on the vertical load distribution based on the arrangement of the equipment (22) placed on the vibration isolation floor (3).

In addition, a gap is provided between the vibration-isolating floor (3) and the surrounding wall so that the vibration-isolating floor (3) can move due to input of horizontal vibration. A bellows (23) is stretched between them to close the gap.

Next, the operation of the vibration isolator (1) when traffic vibration or earthquake motion occurs will be explained below.

When receiving vibration input from traffic vibration or seismic motion, the upper rail (5) at the bottom of the vibration isolation floor (3) remains stationary, and the lower rail (6) at the top of the slab (2) remains in the XY plane. Considering the movement, the rollers (10) (10) of the upper roller segment (7) of the bearing (4)...
moves along the rolling surface (14)i of the upper rail (5) in the X direction and at the same time moves the roller (12) of the lower roller segment (8).
) (12)... is the rolling surface (1) of the lower rail (6)
5) Move above in the Y direction. This movement of the upper roller segment (7) in the X direction and the movement of the lower roller segment (8) in the Y direction
Due to the directional movement, the slab (2) of the lower rail (6)
The vibration-proof floor (3) of the upper rail (5) can be held stationary even when moving in any direction on the Y plane. At this time, the rollers (10) of the upper and lower roller segments (7) (8)
...(12) ... has a convex curved surface shape, and this is the concave curved rolling surface (14) of the upper and lower rails (5) and (6).
(15), it is necessary to tilt the upper and lower roller segments (7) and (8) relative to each other.
This allows the upper and lower roller segments (7) and (8) to be tilted in all directions by elastic deformation of the vibration isolating rubber body (9).

To explain more specifically, for example, with respect to the upper rail (5) of the vibration-proof floor (3) in a stationary state,
FIG. 6 shows a state in which the lower rail (6) of is displaced by a in the X direction. In this case, the rollers (12) (12)... of the lower roller segment (8) of the support (4) do not roll due to their longitudinal displacement, and the upper roller segment (7) does not roll. ) (10) ... will move by a amount a in the X direction from the neutral position while rolling on the rolling surface (14) of the upper rail (5). At this time,
Roller (10) (1) of upper roller segment (7)
0)... has a convex curved surface, which is the upper rail (5)
Since it is supported by the concave curved rolling surface (14) of the upper roller segment (7), the upper roller segment (7
) is tilted by θ in the X direction with respect to the lower roller segment (8). In this way, the rollers (10) (10)... of the upper roller segment (7) have a convex curved surface and are received by the concave curved rolling surface (14) of the upper rail (5), thereby preventing As the bearing height h between the shaking bed (3) and the slab (2) increases to h + Δh, the increase Δh tries to reach the most stable value, that is, 0, so the bearing height eventually becomes h. It will return automatically. That is, the upper roller segment (7) can be automatically returned to the neutral position, and there is no need to separately install a restoring spring. Also, the roller (10) of the upper roller segment (7) (
10) The rolling surface (14) of the upper rail (5) on which the upper rails (5) roll in contact with each other is made of a viscoelastic material (18), so that when the upper roller segment (7) moves, the roller (10)
) (10)... rolls while giving local deformation to the viscoelastic body (18), and the energy loss due to this local deformation quickly causes the rollers (10) (10)... to roll. It can be damped and there is no need to install a separate damper. Also, the upper roller segment (7)
Since it is constructed by arranging a plurality of rollers (10) (10)... in parallel, the load-bearing capacity of the upper roller segment (7) can be increased, and according to the applicant's experimental results, for example. It becomes possible to bear a load of 2000 to 5000 kgf in a plane space of 300 mm x 300 mm.

In addition, although the case where the lower rail (6) of the slab (2) was displaced in the X direction was explained above, even if the lower rail (6) of the slab (2) was displaced in the X direction, the support (
The lower roller segment (8) of
) (12)... is the rolling surface (1) of the lower rail (6)
5) will be moved from the neutral position in the X direction while rolling, which is the same as the case in the X direction described above, so the explanation will be omitted.

Finally, another embodiment of the present invention will be described based on FIGS. 7 to 11. This embodiment differs from the previous embodiment only in the support body (24), and the other parts are the same, so their explanation will be omitted. The support of this example (24
) has a constriction part (25) in the vertical center, and upper and lower support plate parts (26) extending vertically from the constriction part (25) and disposed orthogonally to each other, as shown in FIGS.
) (27) and is made of a plastic support (28) made of nylon or the like which is molded integrally or assembled separately, and has support shafts on both sides of the upper and lower support plate parts (26) and (27). (29)...(30)... are installed in parallel, and rollers (31)...(32)... are attached to these spindles (29)...(30)... It has a penetrating structure. Although not shown, the roller (31)...(3
2) Appropriate means are provided to prevent the... from coming off the support shafts (29)...(30)...

This constitutes an upper roller segment (33) consisting of the upper support plate part (26), the support shaft (29), and the rollers (31) (31), and similarly, the lower support plate part (27), Support shaft (30) and roller (32) (3
2) A lower roller segment (34) is constructed. The upper roller segment (33) and the lower roller segment (34) are tiltably connected to each other by a constriction (25). In the upper and lower roller segments (33) (34) a plurality of rollers (31)...
The support shafts (29) are attached to the upper and lower support plate parts (26) (27) in parallel so that (32)... have a convex curved surface shape.
)...(30)...

This support (24) is attached to the upper rail (5) of the vibration-proof floor (3).
When actually used between the lower rail (6) of the slab (2) and the lower rail (6) of the slab (2), when traffic vibration or earthquake motion occurs, the lower rail (6) of the slab (2) is X
When the upper roller segment (33) moves in the X direction on the rolling surface (14) of the upper rail (5) as shown in FIG. It is tilted by θ with respect to the segment (34).

In the above embodiment, the roller segment (7) and the lower roller segment (8) are connected by the vibration isolating rubber body (9) or the plastic constriction (25), but the present invention does not connect the upper roller segment (7) to the lower roller segment (8). and lower roller segment (7) (
8) may be of any structure as long as it can be tilted relative to each other in any direction.

In addition, in the above embodiment, the upper and lower rails (5) (6
) are formed of a viscoelastic material, but the present invention is not limited thereto, and each roller (10) of the upper and lower roller segments (7), (8)...
-(12)...The material itself or its surface may be made of a viscoelastic material.

〔Effect of the invention〕

According to the present invention, a pair of roller segments in which a plurality of rollers are arranged in parallel and supported in a convexly curved surface shape are placed opposite each other with their convexly curved surfaces facing up and down, and the roller segments are mutually The rollers are arranged vertically so that they can tilt relative to each other, with the rollers perpendicular to each other, and rails with concave rolling surfaces that receive the rollers of each roller segment are placed above and below each roller segment, resulting in a simple structure and excellent performance. It is possible to provide a vibration isolating device that exhibits excellent vibration isolating performance, is easy to install and maintain, and has great practical value.

[Brief explanation of drawings]

FIG. 1 is a sectional view taken along line X-X in FIG. 2 showing an embodiment of the vibration isolator according to the present invention, and FIG. 2 is a plan view of the vibration isolator.
Figure 3 is a sectional view taken along the Y-Y line in Figure 2, Figure 4 is a perspective view showing the support body of the vibration isolator, and Figure 5 is a floor covering where the vibration isolator is applied to a part of a building. FIG. 6 is a cross-sectional view showing an example of the construction of the swing, FIG. 6 is a cross-sectional view showing the movement state of the support when the slab is displaced in the X direction from the state shown in FIG. 1, and FIG. FIG. 8 is a front view of the support as seen from the Y direction of FIG. 7, FIG. 9 is a side view of the support as seen from the X direction of FIG. 7, and FIG. 10 is a plan view of the support of FIG. FIG. 11 is a perspective view showing a state in which the rollers are removed, and FIG. 11 is a front view showing a state in which the upper roller segment is tilted from the state shown in FIG. (1) - Vibration isolator, (5) (6L-rail, (
7) (8) - Roller segment l ~, (10) (11) - Roller, (14) (15)
- Rolling surface, (31) (32) ~ Roller, (33) (34L--One roller segment.

Claims (1)

[Claims] (1) A pair of roller segments in which a plurality of rollers are arranged parallel to each other in a convexly curved surface and are supported by shafts are placed opposite each other with their convexly curved surfaces facing up and down, and the rollers of each roller segment are orthogonal to each other. 1. A vibration isolating device characterized in that rails are disposed above and below each roller segment and have concave rolling surfaces for receiving the rollers of each roller segment.