JP2001021000A - Base isolation supporting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent vibration from directly transmitting to a structure such as an experiment facility, and hold a main body structure without vibrating by mounting first permanent magnet on an upper surface of a foundation side structure, and mounting a second permanent magnet which is faced to an upper part of the first permanent magnet and which is magnetically repelled, on a lower surface of the main body structure. SOLUTION: In the case where an experiment facility 1 is held on a facility base 2 in a non-vibration condition, the experiment facility 1 is base isolation-supported on, for example, a rubber made pad 3 disposed on the facility base 2 through base isolation supporting devices 4 disposed, for example, on four corners of the experiment facility 1. Each base isolation supporting device 4 is formed in such a constitution that plate shaped permanent magnets 8, 17 disposed on an upper surface and a side surface of a square block main body 7 in a foundation side structure 5 fixed to the pad 3, and plate shaped permanent magnets 13, 16 disposed on a lower surface and a side surface of the square block main body 12 in a main body structure 9 fixed to a lower surface part of a support base 10 of the experiment facility 1, are faced to face in a condition in which respective magnets are repelled each other. It is thus possible to prevent vibration from directly transmitting to the main structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration isolating support device for various structures.

[0002]

2. Description of the Related Art When a structure is, for example, an experimental facility, a building equipped with the experimental facility, and other instruments such as instruments for measuring a small amount of weight or precision machinery,
Vibration caused by the traffic of vehicles, etc. is extremely hindered, so experimental equipment, instruments, precision machinery, etc. are supported on the table by vibration isolation, and the installation structure itself is isolated. Or support it.

Further, in order to safely support the building against vibrations caused by an earthquake or the like, the building itself is supported in a vibration-isolating manner. There is a structure in which a structure such as an installation structure or a building is elastically supported using rubber or a spring (spring) to absorb vibration.

[0004]

However, in the conventional vibration isolating support device, since the structure is directly elastically supported, it is difficult to reliably absorb the propagation of the vibration to the structure. .

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and is an epoch-making vibration isolator capable of reliably eliminating the direct propagation of vibration to a structure such as an experimental facility. It is intended to provide a support device.

[0006]

That is, in the vibration-isolation supporting device according to the present invention, a first permanent magnet is mounted on the upper surface of a foundation-side structure, and a magnetic field is opposed to an upper portion of the first permanent magnet. It is characterized in that the second permanent magnet which repulses is mounted on the lower surface of the main body structure arranged on the upper part of the foundation structure (claim 1).

According to the vibration isolating support device having the above-described structure, the main structure is magnetically suspended above the base structure, and the main structure is supported in a non-contact state. Even though, there is no direct propagation of vibration to the main body structure, and the main body structure can be held without vibration.

[0008] Preferably, a wall-shaped body is suspended from the body structure so as to face the outer wall of the foundation structure, or is opposed to the outer wall of the body structure. As described above, the wall-shaped body is raised and connected to the foundation-side structure, and a third permanent magnet is mounted on one of the wall-shaped body and the wall.
The fourth magnetically repelled opposing face of the permanent magnet
Is mounted on the other of the wall and the wall (claim 2).

That is, the horizontal movement of the main body structure in a magnetically suspended state is restrained in a non-contact manner by magnetic repulsion by the permanent magnet. Since the vibration in the direction is never transmitted directly to the main structure,
Vibration-free holding of the main body structure is more effectively achieved.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an experimental facility 1 as an example of a structure.
Is shown.

The experimental equipment 1 is supported on a pad 3 made of rubber, for example, provided on an equipment base 2 through a vibration isolating support device 4 through a vibration isolating support device 4. 1
For example, it is arranged in four corners.

2 and 3, which show a set of details of the vibration isolation support device 4, reference numeral 5 in the drawings denotes a foundation-side structure fixed on the pad 3, and is used to fix the pad 3 with a screw a. The first plate-shaped permanent magnet 8 is mounted on the left and right sides of the upper surface of the block body 7 with its N magnetic pole facing upward, for example. ing.

Reference numeral 9 denotes a main body structure fixed to the lower surface of the support base 10 of the experimental facility 1 so as to face the foundation-side structure 5, and a flange 11 for fixing the support base 10 with a screw b. Is provided on the rectangular block body 12, and on the left and right sides of the lower surface of the block body 12,
A second plate-shaped permanent magnet 13 is mounted facing the upper part of the first permanent magnet 8 with its N magnetic pole facing downward.

That is, the second permanent magnet 13 is mounted on the main body structure 9 so as to magnetically repel the first permanent magnet 8, and the main body structure 9 and thus the experimental facility 1 are moved to the basic structure. The experimental facility 1 is configured to be magnetically suspended above the object 5 so as to support the experimental facility 1 in a non-contact state by the foundation-side structure 5. Does not cause any direct propagation of the vibration to the experimental facility 1, so that the experimental facility 1 can be maintained without vibration.

Here, the main structure 9 and thus the experimental equipment 1
It is needless to say that in magnetically floating, the permanent magnets 8 and 13 having a magnetic repulsive force capable of supporting the entire weight are selected, and the permanent magnets 8 and 13 for that purpose have large remanence and coercive force. Magnetic steel that does not easily lose magnetism due to heat, vibration, etc., for example, hard alloy steel obtained by adding chromium, titanium, nickel, cobalt, molybdenum, tungsten, etc. to carbon steel, specifically, KS steel, MK steel, etc. Is preferably selected.

In addition, a rare earth magnet, particularly a neodymium magnet, is more preferably selected because it forms a strong magnetic field. This is because a neodymium compound is made into a powder and a weight ratio to a synthetic resin material (for example, nylon). In this case, a magnetic material which is formed by mixing 96% and magnetizing it into a plate shape and then magnetizing it can be suitably used. Since this magnetic material can be molded into an arbitrary shape, it is also suitable in terms of an installation surface.

Next, reference numeral 14 in the drawing denotes a horizontal movement restricting means for the main body structure 9, which is opposed to the outer peripheral wall 7a of the foundation side structure 5 at a predetermined interval. While the wall 15 of the rectangular cylinder is provided in the main body structure 9 in a hanging manner,
A third plate-shaped permanent magnet 16 is mounted on the four inner side surfaces of the wall-like body 15 with its N-pole facing inward.

Then, facing the side of the third permanent magnet 16 and directing the N magnetic pole toward the third permanent magnet 16, the fourth permanent magnet 16 is formed on the outer peripheral wall 7a of the foundation-side structure 5. The plate-like permanent magnet 17 is attached, and the horizontal movement of the main body structure 9 in a magnetically suspended state is controlled by the third and fourth permanent magnets 1.
It is configured to restrain the main body structure 9 from moving horizontally by the magnetic repulsion by the magnetic repulsions 6 and 17, thereby preventing the main body structure 9 and the experimental facility 1 from vibrating. Is more effectively achieved.

As shown in FIG. 4, the base is 20 × 3
A container having a size of 0 cm, a height of 30 cm and a weight of 2.5 kg is prepared as the main body structure 9, and 0.3 to
A neodymium permanent magnet (15-20 megagauss Olsted) 13 manufactured by Mate and having a thickness of 1.0 cm and a size of 6.0 × 9.0 cm square is mounted, and the permanent magnet 13 and the body structure 9 are magnetically repelled. As described above, the permanent magnet 8 having the same properties as described above is mounted on the foundation-side structure 5 so as to face the permanent magnet 13, and the main structure 9 is magnetically suspended. When a precision balance weighing 5 kg was placed as the equipment 1 with its center of gravity G almost aligned with the center of the main body structure 9, the precision balance was formed with a 7 mm gap between the permanent magnets 8 and 13. The balance could be supported without contact.

In this support state, when vibration of 60 to 75 dB is applied to the foundation-side structure 5 at intervals of 10 seconds for 30 seconds, no direct propagation of vibration to the main body structure 9 occurs. Thus, the experimental equipment (precision balance) 1 could be held without vibration.

FIG. 4 shows a specific example of the vibration isolation support according to another embodiment. In this embodiment, a large number of vibration-isolation supporting devices 4 having an increased permanent magnet area are evenly arranged on a floor slab 18, and the vibration-isolation supporting device 4 supports the floor unit 19 in a vibration-isolating manner. , Floor unit 19
A test stand 2 is installed on the upper part of the experimental equipment 1 via a vibration isolation support device 4.

According to this configuration, the floor slab 18 of the building
Is not directly transmitted to the floor unit 19, and the vibration of the floor unit 19 is not directly transmitted to the experimental equipment 1. Therefore, the experimental equipment 1 is supported in two stages. This is preferable in that it can be performed.

In the above-described embodiment, the experimental equipment 1 and the floor unit 19 are shown as the structures to be supported by the vibration isolation. However, the present invention is not limited to this, and various instruments and precision machines are not limited to this. It is possible to support the vibration, and in addition, by increasing the volume of the permanent magnet or increasing the number of the vibration-isolation supporting devices 4, the entire building can be magnetically floated. Therefore, the whole building can be supported by vibration isolation.

Further, as a horizontal movement restraining means 14 for the main body structure 9, a rectangular cylindrical wall 15 is hung on the main body structure 9 so as to face the outer peripheral wall 7 a of the foundation side structure 5. On the contrary, a wall-like body is raised on the foundation-side structure 5 so as to face the outer peripheral wall of the main body structure 9 and is connected to the wall-like body. Third permanent magnet 1
6, while the fourth permanent magnet 17 is provided on the outer peripheral wall of the main body structure 9, the movement restricting means 14 may be configured.

[0025]

As described above, according to the present invention, the main structure is magnetically suspended above the foundation-side structure, and the main structure is supported in a non-contact state. Even if the side structure vibrates, the vibration does not directly propagate to the main body structure, so that the main body structure can be held without vibration.

[Brief description of the drawings]

FIG. 1 is an overall view of an experimental facility supported on a facility base with vibration isolation.

FIG. 2 is a cross-sectional view of the vibration isolation support device.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is an explanatory view of a vibration isolation support of a floor unit according to another embodiment.

[Explanation of symbols]

5: foundation side structure, 7a: outer peripheral wall portion, 8: first permanent magnet, 9: main body structure, 13: second permanent magnet, 15 ...
Wall-shaped body, 16: third permanent magnet, 17: fourth permanent magnet.

Claims (2)

[Claims] A first permanent magnet is mounted on an upper surface of a foundation-side structure, and a second permanent magnet magnetically repelled opposite to an upper portion of the first permanent magnet is attached to the foundation-side structure. A vibration isolation support device, which is mounted on the lower surface of a main body structure disposed on an upper part of the vibration isolator. 2. A wall-shaped body is suspended from the main body structure so as to face the outer peripheral wall of the foundation-side structure, or the foundation is arranged so as to face the outer peripheral wall of the main body structure. A wall-shaped body is raised and connected to the side structure, a third permanent magnet is mounted on one of the wall-shaped body and the wall, and magnetically opposed to the side of the third permanent magnet. The vibration-isolation supporting device according to claim 1, wherein a repelling fourth permanent magnet is mounted on the other of the wall and the wall.