JPS61200265A - Vibration damping apparatus - 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 This invention has a frame assembly that supports an object by being supported by three or more elastic support devices, and this frame assembly has a plurality of rigid structures. This invention relates to a vibration isolator in which elements are combined.

2. Description of the Related Art Conventionally, this type of vibration isolator has a frame assembly in which structural elements such as a plurality of rigid beams are firmly connected, and this frame assembly is firmly attached to an elastic support device. A combination is being made.

Problems to be Solved by the Invention In such a conventional vibration isolator, the elastic deformation of the frame assembly reduces the relatively low natural vibration in the range to be vibration-isolated, for example, about 2 to 10H2, including the supported object. This is problematic because numerical oscillations occur.

The present invention solves these problems and provides a vibration isolating device that does not have a relatively low natural frequency within the range in which vibration isolating.

This invention can also be installed when constructing another upper floor separate from the concrete floor, conventionally called an access floor, etc., and accommodating various types of piping, electric wires, etc., or when creating a double floor with concrete. This provides a vibration isolator suitable for

Means for Solving the Problems The present invention includes a frame assembly for supporting a supported object by being supported by three or more elastic support devices, and the frame assembly includes a plurality of rigid components. A vibration isolator in which the frame assembly is coupled to each other at the coupling portions of the constituent elements and at the coupling portion to the elastic support device via flexible structure coupling means. It provides:

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

In one embodiment of the present invention shown in FIGS. 1 to 7,
Reference numeral 10 indicates, for example, four air spring devices serving as elastic support devices, each of which is supplied with compressed air from an air tank 11 and a spring 13 through automatic leveling valves 15, respectively. Compressed air can be discharged to the outside. The air spring 12 has a spherical recess 16 formed at the center of the lower part thereof, and a spherical convex part 17 formed at the upper center thereof, which faces each other so that it can be tilted into contact with the air spring 12 and serves as a stopper for the air spring 12. is configured. Further, a rod-shaped protrusion 2o protrudes upward from an upper surface plate 18 that covers the upper surface of the air spring 12 integrally with the protrusion 17. Generally, the elastic support device is 3
It is necessary to provide more than one device, and instead of an air spring device, other types of devices such as a magnetic levitation support device or a helical spring may be used, and it is desirable that the height of each device can be automatically adjusted. be.

Reference numeral 21 denotes a frame assembly, which is connected to the air spring device 10 at both ends and arranged in parallel with a pair of beams 22, which are constituent elements of the frame assembly, and arranged in a direction perpendicular to the beams. It is constituted by a plurality of beams 23, each of which is a similar component and whose both ends are connected to a beam 22. 25
is a rubber member that is arranged at the part where the end of the beam 22 is connected to the air spring device IO to constitute a flexible connecting means, and is designed to pass through the protrusion 20 and overlap the top plate 18. It has a cylindrical part 27 surrounding the shaped part 26 and the protruding part 2o. The beam 22 has a hole 28 formed at its end so as to fit into the outside of the cylindrical portion 27, and is supported by the upper plate 2o via a plate portion 26. Recesses 3o are formed at both ends of the beam 23 from the lower surface, and a rubber member 31 having a U-shaped cross section is fitted from above the beam 22 along the recesses 3o. The rubber member 31 also constitutes a flexible connecting means.

32 is a concrete floor that supports the air spring device 10. Reference numeral 33 denotes an upper floor constituting an access floor arranged upwardly from this floor, which includes a plurality of fixed floor plates 35 and a plurality of movable floor plates 36 arranged in a predetermined range from the fixed floor plates through gaps 37. It's well structured. The fixed floor plate 35 is fixed to and supported by the floor 32 via support columns 38 fixed to the floor 32. The movable floor plate 36 is the beam 23
It is fixedly supported thereon via support legs 40 which are engaged and fixed from above. This movable floor plate 36 is adapted to support a supported object such as a machine (not shown) thereon. The frame assembly 21 is spaced between a floor 32 and an upper floor 33, and pipes, electric wires, etc. (not shown) are arranged in this space.

In the configuration as described above, an object supported by the movable floor plate 36, such as a machine, is supported by the air spring device 10 via the frame assembly 21. In this case, since the frame assembly 21 is provided with the rubber members 25 and 31, it is possible to eliminate natural vibrations having a relatively low frequency of, for example, about 2.3 to 10 Hz, which is caused by the elastic deformation of the entire frame assembly. The inherent movement of the respective beams 22, 23 at a relatively high yarn movement rate is hardly a problem. Therefore, since there is no natural vibration in a problematic frequency range, the vibration damping effect can be significantly enhanced.

In the embodiment shown in FIGS. 8 to 10, the air spring device 10
The frame assembly 21 is designed to support a portion of the frame assembly 21 that is not an end, such as near the center, and the ends of the two beams 22 are overlapped and connected via a rubber member 25, respectively.

Also shown is a state in which the ends of two beams 23 extending in opposite directions perpendicular to the beam 22 are overlapped and connected via rubber members 31, respectively. In this way, a sequential vibration isolator can be assembled using short beams 22, 23 and many air spring devices 10, resulting in a relatively low unfavorable range with overall deformation of the frame assembly 21. It is possible to prevent the natural vibration of the frequency of . Also, by combining L7 and predetermined parts in this way, vibration isolators of various sizes can be constructed.

In the embodiment shown in FIGS. 11 and 12, a supported object 90 such as a machine is directly supported by support legs 42 that are attached to beams 23 and pass through holes 41 made in the upper floor 33. It is designed to let you do so.

In another embodiment of the invention, shown in FIGS. 13-17, frame assembly 21 has opposite ends connected to air spring devices lO.
A pair of parallel beams 22 supported via a rubber member 25
have. Reference numeral 45 denotes a pair of beams whose ends are connected to each beam 22 in a downwardly spaced manner via hanging members 46 which serve as connecting members of a flexible structure, and are constituent elements of the frame assembly 21. Various materials can be used as the hanging member 46, such as a thin elastic metal rod, a wire rope, a fiber rope, etc., and this allows the beam 45 and the parts connected thereto to perform rocking motion. become. Generally, three or more hanging members 4θ are required. A pair of beams 47 are connected at both ends to each beam 45 via rubber members 31 each having a U-shaped cross section, and are constituent elements of the frame assembly 21. A supported object 90 such as a machine is a conduit 47
It is supported by support legs 42 which are fixed to the floor plate 35 and pass through holes 41 formed in the floor plate 35.

Reference numeral 55 denotes damping devices provided at two locations, each of which is constructed as described below. That is, 56 is a support plate fixed on the floor 32. 57 is a viscous damper, and support plate 56
Silicone oil 5 is placed in a container 58 slidably disposed above.
9 accommodates the reed, and a rod member 60 with a circular cross section that is attached to protrude downward from the lower surface of the beam 45 is inserted. Reference numeral 61 is a rubber bellows that allows the rod member 60 to move relative to the container 58 and covers the container 58 to prevent dirt and the like from entering. Reference numeral 62 designates oil dampers arranged in directions perpendicular to each other, in which a cylinder 63 is connected to a connecting member 65 attached to a support plate 56 via a universal joint 66 (not shown in detail), and a piston rod 67 is connected to the universal joint 66. It is connected to the container 58 via 68.

In the embodiment shown in FIGS. 13 to 17, a beam 45. Beam 47. There is a natural vibration in which the support leg 42 and the supported object 90 swing together, but the dimension A? 2. With the addition of the action of the rubber member 25 and 31, there is no natural vibration based on elastic deformation of the frame assembly 21 at a problematic frequency. There is.

Further, the viscous damper 57 is designed to dampen weak imaging, and the oil damper 62 is designed to dampen large vibrations. Therefore, this embodiment also has a seismic isolation effect.

In the present invention, a hinge-type universal joint, a leaf spring, or the like may be used as the connecting means of the flexible structure.

Effects of the Invention As mentioned above, in the present invention, flexible structure connecting means is provided at the joints of the constituent elements constituting the frame assembly 21 and at the joints with the elastic support device, so that elastic deformation of the frame assembly 21 is prevented. It is possible to prevent vibrations in the range of vibration isolation based on the specific imaging frequency. In this invention, the suspension member 46 is used, and the natural frequency is extremely low, so that a high vibration-proofing effect can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a sectional view taken along the line A-A in FIG. 2 showing the essential parts of an embodiment of the present invention, FIG. 2 is a partially cutaway plan view of the essential parts, and FIG. is B in Figure 2
-B sectional view, Fig. 4 is a piping diagram of the air spring device, Fig. 5 is an overall plan view, Fig. 6 is a C-C sectional view in Fig. 5,
FIG. 7 is a sectional view taken along line DD in FIG. 5. FIG. 8 is a plan view of a main part showing a partially modified embodiment, FIG. 9 is a sectional view taken along the line EE in FIG. 8, and FIG. 10 is a sectional view taken along the line FF in FIG. 8. FIG. 11 is a plan view showing a partially modified embodiment, and FIG. 12 is a sectional view taken along line G-C in FIG. 11. Fig. 13 is a plan view showing another embodiment of the present invention with the upper floor removed, Fig. 14 is a plan view showing some details thereof, Fig. 15 is a sectional view taken along line H--H in Fig. 14, FIG. 16 is a sectional view taken along the line JJ in FIG. 14, and FIG. 17 is a sectional view taken along the line J--J in FIG. 14. 10 is an air spring device, 15 is an automatic leveling valve, 2
1 is a frame assembly, 22 is a beam, 23 is a beam, 25 is a rubber member, 31 is a rubber member, 40 is a support damping device, 57 is a viscous damper, and 62 is an oil damper. Agent Patent Attorney Akira Katsube Chofuyu = No. 41!1 Fig. 6 J5 Fig. 7 Fig. 3 Fig. 118 Hz B Fig. 13 Fig. 14 -■ Fig. 15 Fig. 161111 10: Medium L "Winter Fold 1 Figure 17 21 = 7 Lem Flea IL Solid zz:gL +s:L Procedural Amendment March 12, 1985

Claims (1)

[Claims] It has a frame assembly that supports a supported object by being supported by one, three or more elastic support devices, and this frame assembly is made by combining a plurality of rigid components. A certain vibration isolator is characterized in that the frame assembly is connected via a flexible structure connecting means at the connecting portions of the constituent elements and at the connecting portion with the elastic support device. 2. The vibration isolator according to claim 1, wherein the connecting means of the flexible structure includes a connecting means made of a material having rubber-like elastic properties. 3. The vibration isolator according to claim 1 or 2, wherein the connecting means of the flexible structure is three or more hanging members extending downward, and the components supported by the hanging members. and a vibration isolating device characterized in that the supported object is able to swing as a whole at a low natural frequency.