JPH102129A - Three-dimensional vibration isolation parts - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve the miniaturization of a device and properly vary load resistance and vibration isolation characteristics by providing a three-dimensional vibration isolation functioning part, a casing, and a supporting body and providing a viscoelastic body in a vertical vibration isolation functioning part. SOLUTION: When the ground G vibrates in a horizontal direction, a casing 6 vibrates together with the ground G in the same period and amplitude. However, due to a sliding action caused by the weight of a supported body A and a centripetal action and frictional force of a recessed surface 11 and a contact element 15, the element 15 keeps its position and prevents horizontal vibration from being transmitted to the body A. On the other hand, in the vertical vibration of the ground G, a horizontally moving part 12 vibrates together with the ground G; however, a viscoelastic body 21 exhibits a shearing deformation and absorbs the vibration, so that the height of the body A is maintained as it is through a supporting part 8 and a connection part 9. The body 21 is formed from a silicone gel having a degree of penetration of 30-200 according to JIS, K, 2207-1980, 50g load. Thus vibrations in three-dimensional directions can be isolated simultaneously.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a component of a three-dimensional vibration isolator capable of simultaneously performing horizontal vibration isolation and vertical vibration isolation, and particularly relates to a change in weight of a supported member. The present invention relates to a three-dimensional anti-vibration part capable of setting various load resistance and anti-vibration characteristics correspondingly.

[0002]

BACKGROUND OF THE INVENTION In Japan, where there are many earthquakes, the importance of earthquake-resistant structures has long been called out, and in the field of construction, construction, or in the arts and crafts possessed by museums and art museums, etc. In the field of storage of cultural assets, various seismic structures having different structures have been proposed, which are used for improving the earthquake resistance of the buildings and the like and preventing damage to the cultural assets. Among them, as a seismic structure adopted in the field of construction of buildings and the like, conventionally, a structure which attempts to cope with a shake of a building or the like caused by an earthquake due to the strength and tenacity of a structural material.

In recent years, however, many seismic structures based on the seismic isolation theory, which are new seismic structures completely different from the seismic structures described above, have been adopted. Here, seismic isolation theory means that by installing a special device between the ground and the supported body supported by this ground,
It refers to the idea of increasing the natural period of the supported member to thereby insulate vibration transmission from the ground to the supported member.
As a seismic structure 1 'based on such a seismic isolation theory, there are many laminated rubber types constructed by laminating a rubber plate R and an iron plate M in several layers as shown in FIG. It is used. This increases the resistance against the load in the vertical direction by the interposition of the iron plate M, enables the support of the supported member A, and makes use of the elastic force of the rubber plate R in the horizontal direction as it is. That is, insulation of vibration transmission from G to the supported member A is achieved.

In order to prevent damage to the cultural properties, etc., seismic-resistant structures based on seismic isolation theory have been adopted for floors or for a display case of the cultural properties provided in the floor. . Among them, as a seismic structure 1 'intended for vibration isolation in units of floor, a laminated rubber type shown in FIG. 16 (a) is arranged on the floor bottom of a floor to be subjected to vibration isolation, as an example. The system has been adopted. On the other hand, as an anti-seismic structure 1 'in units of display cases or the like, as shown in FIG. By contacting the rollers C and the rollers C, two slide panels P sliding in a certain direction, a spring E slidably supporting these slide panels P, and the sliding thereof are suppressed. An example is provided in which a plurality of sets each including an oil damper D that functions to attenuate the vibration are provided.

[0005] These seismic structures have an effect only on horizontal vibrations, and have no effect on vertical vibrations. Therefore, in order to cope with the prevention of vibration of a total of three axes of two horizontal axes and one vertical axis, that is, prevention of three-dimensional vibration, in addition to the above-mentioned earthquake-resistant structure, a vertical vibration-proof structure including a metal spring, an air spring, and the like is required. The fact was that they were separately used together. However, FIG.
16 'of the laminated rubber type shown in FIG.
The anti-seismic structure 1 'in which the guide rails L are vertically arranged at right angles to each other is set to be somewhat high in structure, and the above-mentioned vertical anti-vibration structure is added to such an anti-seismic structure 1'. When used together, this type of vibration isolator becomes too expensive and is not suitable for practical use.
The structure shown in FIG. 16B has a complicated structure, and there is still room for improvement in this respect.

Further, even in the case of a vertical vibration isolating structure using a metal spring, an air spring, or the like, the vertical vibration isolating structure itself is used to a certain extent by being used in a state where a force acts in the compression direction. It was set higher. Furthermore, the above metal springs, air springs, and the like are not necessarily sufficient in terms of damping characteristics, and there has been a demand for the development of a vibration damping structure that can have even more vibration absorbing characteristics. Furthermore, as an earthquake-resistant structure for a relatively small and lightweight supported body such as a shelf or a display case installed on the floor, the structure including the structure shown in FIG. In most cases, the characteristics cannot be changed, and the same earthquake-resistant structure is unavoidably used even if the shape, structure, or weight of the supported body changes, or even if the environment or operating conditions differ. It was a reality.

Furthermore, in the case of the earthquake-resistant structure shown in FIG. 16 (b), foreign substances such as dust and dust easily penetrate into the structure, and cannot be used in an environment where there is a lot of dust and dust. It was actual. The various problems of such an earthquake-resistant structure and vibration-proof structure are not limited to the field of vibration-proof against vibrations caused by natural factors such as earthquakes. In the field of vibration isolation caused by human factors such as factories equipped with transport lines or roads with heavy traffic or along roads, and various facilities installed in ships and vehicles with vibration. The same applies to the field of equipment vibration isolation. In addition, the above-mentioned artificial factors include machines that generate relatively low-frequency vibrations. For example, when an arm is moved in the field of a large precision machine tool such as an NC that can machine with an accuracy of a micrometer order. In the field of vibration reduction such as a print head high-speed moving type printer, it is necessary to reduce the processing dimension error caused by random low frequency vibration generated in Reducing the decrease in accuracy has also been a problem to be solved.

[0008]

[Technical matters attempted to be developed] The present invention fully recognizes the existence of such a background, and has been devised based on the recognition, and has three axes of two horizontal axes and one vertical axis. In other words, in providing an anti-vibration device capable of simultaneously performing three-dimensional anti-vibration, by simultaneously achieving simplification of the structure, miniaturization and thinning, and further improvement of the damping characteristics, and supported In response to changes in body weight, etc.
A new and extremely useful three-dimensional protection that can achieve the solution of the problems disclosed in the background at a glance by making it possible to adjust the load-bearing and vibration-proof characteristics appropriately and to have a structure in which foreign matter is hardly mixed. This is an attempt to develop vibration parts.

[0009]

That is, a three-dimensional vibration isolating part according to claim 1 performs a horizontal vibration isolation by a seismic isolation function and a vertical vibration isolation by a vibration absorption action. A three-dimensional vibration isolating section configured by integrally combining a vertical vibration isolating section, a casing that covers the three-dimensional vibration isolating section, and a three-dimensional vibration isolating section for the casing. The horizontal vibration isolating section of the three-dimensional vibration isolating section includes a gentle concave surface and a contact that is always in contact with the concave surface. The relative position between the depressed surface and the contact is configured to converge to a fixed position by centripetal action, while the vertical vibration isolator has at least a large amount of force acting in the shear direction. Has a viscoelastic body to be placed Made Te, those comprising as characterized by being configured to absorb vibration transmitted by its own deformation effect of the viscoelastic body. By using such specific features of the invention, the vibration including a large amount of low frequency components generated in the horizontal direction is reduced by the seismic isolation action of the horizontal vibration isolator, while including the high frequency component generated in the vertical direction. Since the vibration is attenuated by the vibration absorbing function of the vertical vibration isolator, it is possible to simultaneously perform three-dimensional vibration isolation. In addition, since the horizontal vibration isolator has an extremely simple structure utilizing the centripetal action of the concave surface and the contact, it can contribute to a reduction in product cost, a reduction in thickness, and a reduction in size. In addition, the vertical vibration isolator has a viscoelastic body that is arranged so that a large amount of force acts in at least the shear direction. This can contribute to simplification, thinning, and miniaturization. Furthermore, by combining the horizontal and vertical vibration isolating sections integrally and housing them in the casing, it is possible to prevent foreign substances such as dust and dirt from entering and the contact element from falling out of the concave surface. Further, since positioning of the center of the concave surface and the contact has already been performed, even when using a plurality of three-dimensional vibration isolating parts and installing them at an appropriate position, they are simply placed at a desired position. However, since the positional relationship with other concave surfaces and other contacts is not considered at all, simplification of the installation work and the like can be achieved, and the above-mentioned problems can be solved.

[0010] The three-dimensional vibration isolating part according to claim 2 is
In addition to the above requirements, the horizontal vibration isolator has a horizontal floating portion formed with one of a concave surface or a contact, and a centripetal portion formed with the other of the concave surface or the contact. On the other hand, the vertical vibration isolating section is configured by elastically connecting one of the casing or the support to one of the horizontal floating section and the centripetal section via a viscoelastic body. It is a feature. By using such specific features of the invention as a means, when the horizontal vibration isolating section and the vertical vibration isolating section are integrally combined, a part of both components, specifically, the horizontal floating section or the centripetal section Will be shared
Further reduction in product cost, thinning, and miniaturization are achieved. Also, when trying to dampen three-dimensional vibration transmitted from the ground, first try to dampen horizontal vibration with many low-frequency components, and then try to dampen vertical vibration with many high-frequency components. It is preferable to do so,
In the case where a viscoelastic body is interposed between the horizontal floating portion and the support, the above condition is satisfied in a steady state (position in which the casing is installed on the ground side and the support is positioned on the supported body side). On the other hand, if the viscoelastic body is interposed between the centripetal portion and the casing, the posture is reversed (the bearing is installed on the ground side and the casing is positioned on the supported body side). In the above, the above conditions are satisfied, and the above-mentioned problems are solved.

According to a third aspect of the present invention, in addition to the above requirements, in addition to the above-mentioned requirements, the horizontal vibration isolating portion slides on the concave surface and has a spherical end surface. And a flat bowl-shaped recessed surface set to have a larger radius of curvature than the end face of the contactor. By using such specific features of the invention as a means, the natural frequency can be set low with an extremely simple structure, and the natural frequency and the restoring force can be adjusted by changing the radius of curvature. Become. Further, the positional relationship between the recessed surface and the contact is not particularly limited, and it is possible to dispose the contactor upside down. The effect of reducing the number is also exhibited, and the above-mentioned problem is solved.

Further, in the three-dimensional vibration isolating part according to the fourth aspect, in addition to the requirement according to the first or second aspect, the horizontal vibration isolating portion has a spherical contact with the rolling contact with the concave surface. And two concave surfaces provided to face the contact so as to sandwich the contact, and these concave surfaces are flat so that the radius of curvature is larger than that of the contact. It is characterized by being formed in a bowl shape. By using such specific features of the invention as a means, the natural frequency can be set low without changing the radius of curvature, and the restoring force can be set to be larger than that of the three-dimensional anti-vibration part according to the third aspect. In addition, it is possible to contribute to an increase in the amplitude in the horizontal direction that can be dealt with while keeping the thickness and the size of the horizontal vibration isolating section small, and the above-mentioned problems can be solved.

The three-dimensional vibration-damping part according to the fifth aspect of the present invention is characterized in that, in addition to the requirements described in the second, third, or fourth aspect, the three-dimensional vibration isolating part includes a surface facing the casing and the supporting body, or a part between the casing and the horizontal floating portion. Of the opposing surfaces, one or both of the casing side and the bearing body or the horizontal floating portion side is provided with a cushioning member for absorbing an impact when the casing and the horizontal floating portion are over-approached. It is characterized by having. By using such specific features of the invention as a means, the impact force caused by the collision between the inner peripheral surface of the casing and the outer peripheral surface of the bearing or the horizontal floating portion, which becomes a problem when large amplitude vibration occurs in the horizontal direction, Is absorbed, and the contact is prevented from falling off from the concave surface, which can contribute to solving the above-mentioned problem.

Further, the three-dimensional vibration-damping part according to claim 6 has the following features in addition to the requirements described in claim 2, 3, 4 or 5.
The joint surface between the horizontal floating portion and the bearing body with respect to the viscoelastic body, or the joint surface between the centripetal portion and the casing with respect to the viscoelastic body, has a bottom with respect to the bearing member of the horizontal floating portion or a bottom with respect to the centripetal portion of the casing. It is characterized by being formed in a tapered shape to prevent sticking. And, by using such specific features of the invention, even when a vibration having a large amplitude in the vertical direction occurs, the respective joint surfaces of the horizontal floating portion and the support, or the centripetal portion and the casing come into contact and form a wedge. The action prevents further movement and prevents the horizontal floating part from bottoming on the bearing body or the casing from the centering part. In addition, the viscoelastic body undergoes compressive deformation while undergoing shear deformation due to vibration in the gravity (vertical) direction and the weight of the supported body, so that shear fracture hardly occurs. Also, even in the event that the viscoelastic body is broken, the joining surface formed in a tapered shape comes into contact,
Since the compressed viscoelastic body is held in the gap, the supported body does not extremely tilt, which can contribute to solving the above-mentioned problem.

Further, in addition to the above requirements, the three-dimensional vibration isolating part according to claim 7, wherein the viscoelastic body is JIS K22.
07-1980 It is characterized by being formed of a silicone gel having a penetration of 50 to 50 g within a range of 30 to 200. And by using such invention specific items as means, excellent high damping characteristics are imparted to the vertical vibration isolator, and effective absorption of vertical vibration with a large amount of high frequency components can be achieved. It can contribute to solving the problem.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a three-dimensional vibration isolating part of the present invention will be specifically described with reference to the drawings. In the following description, first, the basic embodiment shown in FIGS. 1 to 4 will be described in detail in the order of its configuration and operating state, and then, the partial configuration will be different from the above-described basic embodiment. FIG.
Reference will be made to various other embodiments shown in FIG. In the figure, reference numeral 1 denotes a three-dimensional vibration-isolating part according to the present invention, which is not generally used alone, but is used in combination as shown in FIG.
Specifically, according to the difference in the shape, structure, weight, etc. of the support A, the number of used, the installation interval, the installation layout, and the like are appropriately selected or adjusted so that the desired load resistance and anti-vibration characteristics are exhibited. To use.

Further, the three-dimensional vibration isolating part 1 of the present invention
Although it is also possible to provide directly between and the support A,
As shown in FIG. 5 (a), an installation plate 2 and a support plate 4 are separately prepared, and an appropriate number of the three-dimensional anti-vibration parts 1 of the present invention are incorporated between them as one unit U. It is also possible to use in units. Further, if there is enough space in the installation space, the three-dimensional vibration isolating parts 1 of the present invention can be used in a plurality of layers as shown in FIG. 5B. Here, the ground G used in this specification will be described.

That is, when the supported object A is a building such as a building or a building such as a bridge, the ground G generally serves as a foundation for the object, and the supported object A is, for example, a floor of the building. In the case of a floor surface, it is a structural member such as a beam for supporting the floor or a concrete-implanted floor foundation. If the supported object A is a shelf or a display case installed in the floor, for example, the floor is used. It is a plane. In addition, when a chandelier or the like suspended from the ceiling is exceptionally used as the supported body A, the ceiling is replaced with the ground G, and the space between the ceiling and the supported body A according to the present invention is provided. The three-dimensional anti-vibration parts 1 will be provided. Incidentally, when supporting the chandelier or the like, other means for maintaining the contact state between the contact 15 and the recessed surface 11 and exerting a centripetal action, for example, a biasing means using a spring or suction using a magnetic force Means are separately provided, and the casing 6 or the support 7
Can be applied from above, and can be supported in a suspended state using appropriate fixing means such as bolts and nuts. However, a part of the casing 6 or the support body 7 is turned downward in an overhang shape, If it is supported from below, there is no need to interpose the urging means or the suction means. In the embodiment described below, a three-dimensional vibration-proof part 1 suitable for vibration-proofing a relatively small and light supported body A having a ground G as a floor is described as an example.

The three-dimensional vibration isolating part 1 of the present invention comprises a horizontal vibration isolator 10 for performing horizontal vibration isolation by seismic isolation, and a vertical vibration isolator 20 for performing vertical vibration isolation by vibration absorption.
, A casing 6 that covers the three-dimensional vibration isolating section 5, and a casing 6 that covers the three-dimensional vibration isolating section 5 via the three-dimensional vibration isolating section 5. And a bearing 7 which is connected in a floating state.

The horizontal vibration isolator 10 includes a gentle concave surface 11 and a contact 15 which is always in contact with the concave surface 11. The relative position between the concave surface 11 and the contact 15 is as follows. It is configured to converge to a fixed position by a centripetal action. Then, the concave surface 11 and the contact 15
One of them is fixed to the casing 6 as a part of the centripetal portion 16, and the other contact 15 or the concave surface 11 is a concave surface 11 or a contact 15 which is a part of the centripetal portion 16. On the other hand, a configuration is provided as an example in which the horizontal floating portion 12 is provided so as to be capable of floating in the horizontal direction while maintaining the contact state.

Here, the centripetal action is further added.
The centripetal action is generated by a restoring force using a slope (including both a curved surface and an inclined surface). The contact direction between the contact surface of the contact 15 and the recessed surface 11 with respect to the direction of gravity, its magnitude, and the frictional force cause the movement direction and The speed is determined. In other words, while the centripetal force is larger than the frictional force, it moves in the centripetal direction and stops at the position where the centripetal force and the frictional force are balanced. Therefore, when the inclination angle is gentle (the radius of curvature is large), the friction coefficient of the contact portion is particularly low. It is necessary to strictly adjust the surface roughness. Incidentally, polyoxymethylene copolymer (POM-C) described later
Has a coefficient of friction μ = 0.12, so that a centripetal effect works at an inclination angle of 6.8 ° or more. In addition, the concave surface 11 formed in a flat bowl-like spherical shape can set the frequency that can be damped by adjusting the radius of curvature, and the magnitude of the amplitude that can be attenuated by adjusting the diameter of the concave surface 11. For example, in the case of an earthquake, a large-amplitude vibration including many low-frequency components of several Hz is generated.
The concave surface 11 having a radius of curvature of not less than 1 mm and a diameter of several hundred to 3000 mm is required.

The fixed state used in the case where the casing 6 and the centripetal portion 16 are joined together means the fixed state shown in FIGS.
In addition to a completely fixed state in which no relative movement occurs between the two as shown in FIG. 4, etc., it is a characteristic component member of the vertical vibration isolator 20 described later between the two as shown in FIG. By using the viscoelastic body 21 interposed therebetween, it is used to include a state in which the viscoelastic body 21 is elastically fixed to allow a slight relative movement between the two.

In the embodiment shown in FIGS. 1 to 4, the casing 6 is formed as a cylindrical container having a bottom as an example, and a projection having a spherical end face is formed at the center of the bottom surface of the casing 6. A horizontal floating portion having a truncated cone shape as an example in which a contact 15 in the shape of a truncated cone is formed, and this is used as a centripetal portion 16, and a concave surface 11 slidingly contacting the contact 15 is formed on the bottom surface. 12 is shown.
As the concave surface 11 formed in the horizontal floating portion 12, a flat bowl-shaped one having a radius of curvature set to be larger than the end surface of the contact 15 is used as an example.

The material constituting at least the concave surface 11 of the horizontal floating portion 12 is required to be excellent in abrasion resistance, impact resistance, creep resistance, and low friction. Depending on the environment, it is required that weather resistance, chemical resistance, fire resistance, oil resistance, etc., and moldability be good. Therefore, various synthetic resins and metals satisfying such conditions can be used, but synthetic resins are more preferable in consideration of problems such as rusting. In the present embodiment, a polyoxymethylene copolymer (POM-C) was used. The polyoxymethylene copolymer satisfies the above conditions, is excellent in cutting workability and moldability, and does not generate rust. Therefore, it can be said that this polyoxymethylene copolymer is suitable as a material for forming the concave surface 11.

On the other hand, the material of the contact 15 which comes into contact with the concave surface 11 is also required to have the same action as that of the concave surface 11. It is desirable to be done. Incidentally, in the present embodiment, the polyoxymethylene copolymer having the concave surface 11 is also used for the contact 15. However, one of the contact 15 and the concave surface 11 may be formed of a polyoxymethylene copolymer and the other may be formed of another material satisfying the above conditions, and the concave surface 11 and the contact 15 may be formed of a combination of different materials. It is possible. It is also possible to interpose oil between the concave surface 11 and the contact 15 so that the relative movement between the concave surface 11 and the contact 15 can be further improved.
It will be smooth.

Next, the vertical vibration isolator 20 which is another component of the three-dimensional vibration isolator 5 will be described. The vertical vibration isolator 20 basically has a viscoelastic body 21 arranged so that a large amount of force acts in at least the shear direction, and the vibration transmitted by the self-deformation action of the viscoelastic body 21 is provided. It is configured to absorb light. The vertical vibration isolating section 20 is configured as an example by elastically connecting one of the casing 6 and the support 7 to one of the horizontal floating section 12 and the centripetal section 16 via a viscoelastic body 21. ing.

In the basic embodiment shown in FIGS. 1 to 4, as an example, a support portion 8 for directly supporting the support member 7 to support the supported member A, the support portion 8 and the horizontal floating portion 12 are provided. A connecting portion 9 for connecting these components is disposed between the supporting portion 8 and the connecting portion 9 in a screwed state. A viscoelastic body 21 is disposed between the connecting portion 9 and the horizontal floating portion 12. It is configured to be installed. Also, in the embodiment shown in FIGS. 1 to 4, the viscoelastic body 21 in the horizontal floating portion 12 and the support 7 is provided.
Is formed in a tapered shape so that the horizontal floating portion 12 is prevented from bottoming on the support 7. By the way, when the joining surface of the horizontal floating portion 12 and the support 7 to the viscoelastic body 21 is tapered, gravity (vertical)
The viscoelastic body 21 undergoes compressive deformation while being sheared and deformed by the vibration of the direction and the weight of the supported member A, so that shear fracture is less likely to occur. This is considered to be due to the elastic force of the viscoelastic body 21 that is compressed. However, even if the viscoelastic body 21 is broken, the above-mentioned tapered joining surface comes into contact with the gap, and the gap is compressed. Since the supported viscoelastic body 21 is held, the supported body does not extremely tilt.

The support portion 8 and the connection portion 9 are connected in a screwed state because the support height of the supported member A is adjusted to an appropriate position, or the supported member A is supported on uneven or inclined ground G. To support A horizontally, each 3D anti-vibration part 1
It is used when it is necessary to change the operation height for each time. Therefore, as long as the same action is achieved, a ratchet mechanism, a hydraulic pressure, or the like may be used, and another height adjusting mechanism may be used, such as a height that can be adjusted by an external operation even after installation. The support portion 8 and the connection portion 9 may be integrally formed, and the height may be adjusted on the casing 6 side, or such a height adjustment mechanism is not particularly provided on the three-dimensional vibration isolating part 1 itself. By arranging an appropriate spacer between the ground G and the casing 6 or between the supported body A and the support portion 8, a similar effect may be obtained.

Further, the viscoelastic body 2 which is one of the characteristic features of the present invention in the vertical vibration isolator 20 is described.
The first material has the weight of the support A and the mechanical strength enough to withstand the shock caused by the pitching during an earthquake, and also allows the transmitted vibration to converge in a short time by its self-deformation action. It is required that the material has the necessary flexibility or high damping property, and that the function and the property are not affected by the use environment such as temperature change. Therefore, as long as such conditions are satisfied, synthetic rubber and various other elastomers can be used, and as one example, silicone gel can be used. Further, in order to sufficiently exhibit the function and characteristics of this silicone gel, JIS K 2207-198 is required.
A silicone gel having a penetration of 30 to 200 with a load of 50 g is used.

Here, the silicone gel will be described.
The silicone gel is made of a dimethyl siloxane component units, a diorganopolysiloxane used by [1] (hereinafter referred to as component _{^{A): RR 1 2 SiO- (R}} 2 2 SiO) nSiR 1 2 R ... ... [1] [where R is an alkenyl group, R ¹ is a monovalent hydrocarbon group having no aliphatic unsaturated bond, and R ² is a monovalent aliphatic hydrocarbon group (of R ² At least 50 mol%
Is a methyl group, and when it has an alkenyl group, its content is 10 mol% or less), and n is a number such that the viscosity of this component at 25 ° C. becomes 100 to 100,000 cSt.] Viscosity at 25 ° C of 500
0 cSt or less, and at least three Si atoms per molecule.
An organohydrogenpolysiloxane having a hydrogen atom directly bonded to an atom (component B), and an alkenyl group contained in the component A based on the total amount of hydrogen atoms directly bonded to Si atoms in the component B Is an addition-reaction type silicone copolymer obtained by curing a mixture adjusted so that the ratio (molar ratio) of the total amount becomes 0.1 to 2.0.

The silicone gel will be described in more detail. The component A has a linear molecular structure, and alkenyl groups R at both ends of the molecule are added to hydrogen atoms directly bonded to Si atoms in the component B. Is a compound capable of forming a cross-linked structure. The alkenyl group present at the molecular terminal is preferably a lower alkenyl group,
A vinyl group is particularly preferred in consideration of reactivity. R ¹ present at the molecular terminal is a monovalent hydrocarbon group having no aliphatic unsaturated bond, and specific examples of such a group include alkyl groups such as a methyl group, a propyl group, and a hexyl group. , A phenyl group and a fluoroalkyl group.

In the above formula [1], R ² is a monovalent aliphatic hydrocarbon. Specific examples of such a group include an alkyl group such as a methyl group, a propyl group and a hexyl group, and a vinyl group. Lower alkenyl groups such as groups can be mentioned. However, at least 50 mol% of R ²
Is a methyl group, and when R ² is an alkenyl group, the amount of the alkenyl group is preferably 10 mol% or less. When the amount of the alkenyl group exceeds 10 mol%, the crosslinking density becomes too high and the viscosity tends to be high. And n is
The viscosity of the component A at 25 ° C. is usually 100 to 10
0000 cSt, preferably 200 to 20000 cSt
Is set to be within the range.

The component B is a crosslinking agent for the component A,
The hydrogen atom directly bonded to the i atom is added to the alkenyl group in the component A to cure the component A. The B component may have any of the above-mentioned effects, and may have various molecular structures such as a linear, branched chain, cyclic, or network structure. In addition, a hydrogen atom and an organic group are bonded to the Si atom in the B component, and this organic group is usually a lower alkyl group such as a methyl group.

Further, the viscosity of the component B at 25 ° C. is usually 5,000 cSt or less, preferably 500 cSt or less. Examples of such a B component include an organohydrogensiloxane in which both molecular terminals are blocked with a triorganosiloxane group, a copolymer of a diorganosiloxane and an organohydrogensiloxane, tetraorganotetrahydrogencyclotetrasiloxane, HR ¹ ₂
Copolymer siloxane consisting of SiO 1/2 units and SiO 4/2 units, and HR ¹ ₂ SiO 1/2 units and R ¹ ₃ SiO 1/2
Copolymeric siloxanes consisting of units and SiO 4/2 units can be mentioned. However, in the above formula, R ¹ has the same meaning as described above.

The ratio of the total molar amount of alkenyl groups in component A to the total molar amount of hydrogen atoms directly bonded to Si in component B is usually 0.1 to 2.0,
Preferably, it is produced by mixing and curing the A component and the B component so as to be in the range of 0.1 to 1.0. The curing reaction in this case is usually performed using a catalyst. As the catalyst used herein, a platinum-based catalyst is preferable. Examples of the catalyst include finely pulverized elemental platinum, chloroplatinic acid, platinum oxide, a complex salt of platinum and olefin, platinum alcoholate, and chloroplatinic acid and vinylsiloxane acid. And complex salts thereof.

Such a complex salt is used in an amount of usually 0.1 ppm or more, preferably 0.5 ppm or more, based on the total weight of the A component and the B component. The upper limit of the amount of such a catalyst is not particularly limited. For example, when the catalyst is in a liquid state or can be used as a solution, an amount of 200 ppm or less is sufficient. The above-mentioned component A, component B and the catalyst are mixed and left at room temperature or cured by heating to produce a silicone gel used in the present invention.

With respect to the hardness of the silicone gel, the amount of the component A can form a crosslinked structure with hydrogen atoms directly bonded to Si in the component B. Alternatively, it can be adjusted by previously adding a silicone oil having methyl groups at both ends in an amount within a range of 5 to 75% by weight based on the obtained silicone gel.

The silicone gel can be prepared as described above, or a commercially available one can be used. Examples of commercially available products that can be used in the present invention include CF5027, TOUGH-3, TOUG
H-5, TOUGH-6 (manufactured by Dow Corning Toray Silicone Co., Ltd.) or X32-902 / cat1300
(Manufactured by Shin-Etsu Chemical Co., Ltd.) and F250-121 (manufactured by Nippon Yunika Co., Ltd.).

In addition to the above components A, B and the catalyst, a pigment, a curing retarder, a flame retardant, a filler and the like can be blended within a range that does not impair the properties of the silicone gel.
Further, a silicone gel obtained by mixing a fine hollow sphere filler may be used. Examples of such a material include Philite (registered trademark) manufactured by Nippon Philite Co., Ltd. and Expancel (registered trademark) sold by Nippon Philite. . In the present embodiment, the penetration is 30 to 40 (JIS K220).
Silicone gel having a penetration of 7 to 1980 and a load of 50 g) was used.

Further, in the basic embodiment shown in FIGS. 1 to 4, as one example, the impact on the inner peripheral surface of the side trunk portion of the casing 6 when the casing 6 and the horizontal floating portion 12 are excessively close is reduced. A buffer 30 is provided. The same material as that of the viscoelastic body 21 described above can be used as the material of the buffer 30. In addition, an opening 6 formed on the upper surface of the casing 6
a is provided for the purpose of permitting relative movement between the contact 15 and the concave surface 11 in the horizontal vibration isolator 10, and is provided with a small-diameter portion 9 a of the connecting portion 9 in the bearing 7.
The opening diameter is set so as to be sufficiently larger than the outer diameter of the concave surface 11 so as to be able to move relative to the concave surface 11.

However, it is expected that the larger the opening diameter is, the more intrusion of dust and dirt will occur.
It is desirable to set as small as possible. It is also preferable to set the support portion 8 larger than the opening 6a and to set the distance between the support portion 8 and the upper surface of the casing 6 as small as possible in order to prevent the intrusion of the dirt and dust. .

Next, a description will be given of an operation state when vibration is transmitted to the three-dimensional vibration isolating part 1 of the present invention constructed as described above. First, for horizontal vibration of the ground G, FIG.
, The casing 6 has the same period as the ground G,
Vibrates at the same amplitude. However, due to the weight of the supported member A and the centripetal action exerted by the concave surface 11 and the contact 15 and the sliding action due to a low frictional force, the contact 1
Numeral 5 secures the position as it is, and prevents horizontal vibration transmission to the supported member A. In the horizontal vibration isolator 10 of the three-dimensional vibration isolator 1 of the present invention utilizing centripetal action, the contact 1
Since the vibration is prevented by the relative movement of the concave surface 5 and the concave surface 11, a slight vertical movement occurs when the contact 15 is located at the center of the concave surface 11 and near the outer periphery during the relative movement, As a result, the supported member A is driven up and down. However, the three-dimensional vibration isolating part 1 of the present invention is provided with the vertical vibration isolating portion 20, and the viscoelastic body 2 is provided.
As shown in FIG. 3, the first member 1 is subjected to the shear deformation, so that the vertical vibration caused by the relative movement is reduced and the vibration is prevented.

On the other hand, when the ground G is vibrated in the vertical direction, the horizontal floating portion 12 vibrates together with the ground G as shown in FIG. 4, but the viscoelastic body 21 undergoes shear deformation and absorbs the vibration. Therefore, the supported member A supported via the connecting portion 9 and the support portion 8 keeps the substantially same height position, and the transmission of the vibration in the vertical direction to the supported member A is prevented. That is, the vertical vibration isolating section 20 in the three-dimensional vibration isolating part 1 of the present invention absorbs vertical vibration from the outside and also reduces vertical movement caused by the relative movement between the contact 15 and the concave surface 11. It also has the effect of damping vibration. By the way, when silicone gel is used as the viscoelastic body 21, the damping characteristics are excellent, the repulsion at the stroke end hardly occurs, and the stable characteristics are always exhibited even with a large temperature change. In addition, stable vertical vibration isolation is achieved. The viscoelastic body 21 exerts a damping effect by compressing and deforming itself against horizontal vibration.

[0044]

[Other Embodiments] Next, FIG.
Various other embodiments having partially different configurations from the basic embodiment shown in FIGS. First, the one shown in FIG. 6 has a three-dimensional anti-vibration part 1 of the present invention in the form of a polygonal prism (shown in FIG. 6 (a)), and the contact 15 has a pyramid shape and comes into contact with it. The recessed surface 11 is configured by connecting a plurality of gentle inclined surfaces having an inclination angle smaller than that of the contact 15 in the circumferential direction (shown in FIG. 6B). Incidentally, even in the case of such a configuration, the same operation as the embodiment shown in FIGS. Also three-dimensional anti-vibration parts 1
The overall external shape, the shape of the contact 15 and the concave surface 11 can take various other shapes, but a shape in which the moving stroke extremely changes depending on the moving direction of the horizontal floating portion 12. (For example, an object whose distance from the center varies depending on the direction, such as an elliptical or rectangular planar shape) is generally unsuitable except for the field of use in which the vibration direction is fixed.

FIG. 7 (a) shows the structure shown in FIGS.
In contrast to the embodiment shown in FIG. 4, a contact 15 is formed on the horizontal floating portion 12 side and a concave surface 11 is formed on the centripetal portion 16 side. By the way, even in the case of such a configuration, the centripetal action in the horizontal vibration isolator 10 is exerted similarly to the embodiment shown in FIGS. In the case of the embodiment shown in FIG.
Is turned upward, so that if foreign matter such as dust or dirt intrudes from the opening 6a of the casing 6, the concave surface 11
There is a concern that these foreign substances may be deposited on the top. In such a case, a bellows-like dust boot-like sleeve S as shown in FIG.
It is preferable to use in combination with a structure in which a foreign matter such as dust and dirt is prevented from entering beforehand.

Note that the bellows-shaped sleeve S is
In addition, it is sufficient to simply fit the viscoelastic body 21 into the casing 6 without any particular fixation. In this case, the relative movement of the support body 7 and the casing 6 in the vertical direction is not restricted at all. Does not apply a load or the like associated therewith, so that the high damping characteristics of the viscoelastic body 21 are fully exhibited. Further, since the sleeve S may be configured to be able to expand and contract at least in the vertical direction, it is of course possible to use another sleeve S having the same function as a cylindrical urethane sponge.

FIG. 8 (a) further shows a spherical contact 15 in which the horizontal vibration isolator 10 is in rolling contact with the recessed surface 11 and opposes the contact 15 vertically so as to sandwich the contact 15. And the two concave surfaces 11 are formed in a flat bowl shape so that the radius of curvature is larger than that of the contact 15.
Incidentally, even when the horizontal vibration isolator 10 having such a configuration is employed, the same centripetal action as the horizontal vibration isolator 10 in the embodiment shown in FIGS.

Incidentally, the horizontal vibration isolating section 1 having such a configuration is used.
When 0 is adopted, the movement stroke of the horizontal floating portion 12 is increased as shown in FIG. 8A, and the same size as the concave surface 11 of the horizontal vibration isolator 10 shown in FIG. FIG. 8A using two concave surfaces 11 having a radius of curvature.
The movement stroke of the horizontal vibration isolator 10 shown in FIG. Therefore, it is possible to cope with a larger amplitude in the horizontal direction. On the other hand, along with this, the opening diameter of the opening 6a of the casing 6 is inevitably enlarged, but a dustproof curtain B which can expand and contract in the horizontal direction as shown in FIG. If it is provided, the problem of intrusion of foreign matter such as dust, dust, and dust is solved.

When the radius of curvature of the concave surface 11 increases, the natural frequency decreases, but the restoring force decreases. However, when the horizontal vibration isolator 10 having such a configuration shown in FIG. 9B is employed, the horizontal vibration isolator 11 shown in FIG. 9A using the concave surface 11 having the same size and radius of curvature is used. It is possible to reduce only the natural frequency without lowering the restoring force on the action portion 10, and as for the natural frequency, as shown in FIG. Depressed surface 11 set twice as shown in FIG.
The same effect as when using is exhibited.

Furthermore, in the case where the horizontal vibration isolator 10 having such a configuration is adopted, the configuration of the contact 15 is not only a spherical one as shown in FIG. Go stone-like flat object as shown in FIG.
It is possible to adopt various shapes of contacts 15 such as a flat columnar one as shown in FIG. By the way, FIG.
The feature of the spherical contact 15 shown in (a) is that the rolling contact is more important than the sliding contact, and the influence of the frictional resistance is small. FIG. 10 (b)
In the go-stone-like contact 15 shown in FIG. 1, it is considered that the rolling contact occurs at the time of the initial vibration, and then the sliding contact occurs, the static friction is small, the initial vibration is excellent,
Another feature is that the entire height of the three-dimensional vibration isolating part 1 can be set low.

Furthermore, in the flat cylindrical contact 15 shown in FIG. 10C, the bottom circumference of the contact 15 has a concave surface 11.
Contact caused by long-term use due to an increase in load resistance and a one-point concentrated load associated with point contact
5 to prevent deformation of the concave surface 11, and furthermore, the contact 15
The improvement of the stability etc. is achieved. When the flat cylindrical contact 15 shown in FIG. 10C is used, foreign matter such as dust enters between the contact 15 and the concave surface 11 (particularly, the concave surface 11 located below). As expected, Figure 1
As shown in FIG. 1A, an exclusion hole 13 for removing foreign matter such as dust entering the centripetal portion 16 or the horizontal floating portion 12 in which the concave surface 11 is formed, or FIG.
As shown in (1), it is also possible to form an exclusion groove 17 for the purpose of eliminating the foreign matter that has entered one or both of the bottom surface and the upper surface of the contact 15.
By the way, when such a configuration is adopted, the cleaning work and the like accompanying the maintenance can be facilitated.

FIGS. 12 (a) and 12 (b) show two types of three-dimensional vibration isolating parts 1 in which the positional relationship between the horizontal floating part 12 and the connecting part 9 of the support 7 is different. There is a buffer 3 for such a three-dimensional vibration isolating part 1.
In order to provide 0, the outer periphery of the small-diameter portion 9a of the connecting portion 9 in the support body 7 shown in (i) of FIG.
2 (a), the periphery of the opening 6a in the casing 6 shown in (ii), the outer periphery of the large diameter portion 9b of the connecting portion 9 shown in (iii) in FIG. 12 (a), or in FIG. 12 (a). , (Iv), any one or all or some of the contact portions between the casing 6 and the support body 7 which occur at the time of excessive amplitude in the horizontal direction, such as the inner circumference of the side trunk portion of the casing 6. It is possible to provide a buffer 30.

Similarly, in FIG. 12B, the outer periphery of the horizontal floating portion 12 shown in FIG. 12I and the inner periphery of the side trunk portion of the casing 6 shown in FIG. It is also possible to provide a buffer 30 at a contact portion between the casing 6 and the horizontal floating portion 12 which occurs at the time of excessive amplitude. FIG.
In (b), the shock absorber 30 is further provided at the positions of (iii) and (iv), which shows a configuration that can be taken when it is necessary to reduce the shock accompanying the collision at the time of excessive amplitude in the vertical direction. It is.

FIGS. 13 and 14 show various arrangements of the viscoelastic body 21 in the vertical vibration isolator 20. FIG. 13 is suitable for use in a normal posture. Various arrangements are shown, while FIG. 14 shows various arrangements suitable for use in the inverted posture. First, FIGS. 13 (I), (I ') and (I ") show a structure in which a viscoelastic body 21 is provided between the support portion 8 and the connection portion 9 in the support body 7, and FIG. FIG. 13 (I ′) is a view in which a viscoelastic body 21 is disposed on the outer peripheral joining surface of the two tapered shapes so as to be capable of shearing deformation.
In addition to this, another viscoelastic body 21 that can be compressed and deformed is disposed on the center facing surface of the bearing portion 8 or the connecting portion 9, and the one shown in FIG.
(I) shows a structure in which the viscoelastic body 21 is formed to extend inward, and the viscoelastic body 21 is arranged so as to undergo shear deformation and compression deformation.

FIGS. 13 (II), (II ') and (II ") show a structure in which a viscoelastic body 21 is provided between the connecting portion 9 and the horizontal floating portion 12, and FIG. (II) raises a part of the outer peripheral side of the horizontal floating portion 12 upward, and arranges the viscoelastic body 21 between the inner peripheral surface of this portion and the outer peripheral surface of the connection portion 9 so as to be capable of shearing deformation. FIG. 13 (II ′) additionally shows a structure in which another compressible deformable viscoelastic body 21 is disposed on the upper surface of the horizontal floating portion 12, and FIG. 13 (II ″).
Shows the viscoelastic body 21 shown in FIG. 13 (II) extended so as to reach the bottom surface of the connection portion 9 and the viscoelastic body 21 is arranged so as to undergo shear deformation and compression deformation. is there.

Further, FIGS. 13 (III), (III ') and (III ") also show a structure in which a viscoelastic body 21 is provided between the connecting portion 9 and the horizontal floating portion 12, and FIG. III) is one in which a viscoelastic body 21 is arranged between the tapered surfaces formed on the outer periphery of the connecting part 9 and the horizontal floating part 12 so that the viscoelastic body 21 can be sheared. FIG. 13 (III ') additionally shows A separate viscoelastic body 21 which can be compressed and deformed is disposed on the central opposing surfaces of the connecting part 9 and the horizontal floating part 12, and FIG. 13 (III ') shows the viscoelastic body 21 shown in FIG. 13 (III). Are formed to extend inward, and the viscoelastic body 21 is disposed so as to be subjected to shear deformation and compression deformation.

Next, various arrangements suitable for use in the inverted posture shown in FIG. 14 will be described. Among them, FIG.
In (I), (I ′) and (I ″), the viscoelastic body 21 is disposed between the outer peripheral surface of the centripetal portion 16 in which the concave surface 11 is formed and the inner peripheral surface of the casing 6 mainly. Things, FIG. 14
(II) (II ′) (II ″) has a viscoelastic body 21 disposed between the outer peripheral surface of the centripetal portion 16 on which the contact 15 is formed and the inner peripheral surface of the casing 6 mainly. 14 (I), (I ′) and (I ″) and FIG.
I) For specific embodiments of (II ′) and (II ″),
Since this is basically the same as FIG. 13, no further description will be given here.

14 (III), the viscoelastic body 21 is disposed on the surface facing the casing 6 and the centripetal portion 16 in the embodiment shown in FIG. The one shown in FIG. 14 (IV)
In the embodiment shown in FIG. 14 (II), the viscoelastic body 21 is disposed on the opposing surface of the casing 6 and the centripetal section 16 in a state where it can be compressed and deformed. The bottom plate portion of the casing 6 is partially recessed, and a viscoelastic body 21 is provided so as to be capable of compressive deformation and shearing deformation, thereby holding the centripetal portion 16. The various embodiments shown in FIGS. 13 and 14 can be used alone, and it is of course possible to use a combination of several of them.

Finally, the embodiment shown in FIG. 15 will be described. In order to be able to use the three-dimensional vibration isolating part 1 of the present invention as a single item, a plurality of points are provided so that the horizontal floating portion 12 can always maintain a horizontal posture even when the load of the supported member A is applied to the support member 7. The horizontal floating portion 12 is supported in the first embodiment. Specifically, in the basic embodiment shown in FIGS. 1 to 4, the contact 15 is provided outside the contact 15 (which is also the centripetal portion 16) provided at the center of the bottom plate portion of the casing 6 at a predetermined interval. The horizontal stabilizing surface 31 having the same curvature or inclination angle as the concave surface 11 that is in sliding contact with the element 15 is formed with a gradient in the centripetal direction. Thereby, regardless of the relative movement between the contact 15 and the concave surface 11, the contact 15 and the concave surface 11 and the horizontal stabilizing surface 31 and the edge portion of the outer periphery of the concave surface 11 are always in contact with each other, so that the horizontal By maintaining the horizontal position of the floating portion 12, it becomes possible to use it alone.

[0060]

The three-dimensional anti-vibration part 1 of the present invention has the specific features of the invention described in claims 1 to 7 embodied by the various embodiments as described above. Thus, the provision of the above-mentioned specific features provides various effects as described below. That is, the horizontal vibration isolator 10 and the vertical vibration isolator 20
With the structure integrally combined, the horizontal vibration is reduced by the horizontal vibration isolator 10, while the vertical vibration is attenuated by the vertical vibration isolator 20. It is possible to perform vibration simultaneously. Moreover, since the horizontal vibration isolating section 10 and the vertical vibration isolating section 20 are housed in the casing 6 and are covered, no foreign matter such as dust or dirt incurs any problem. It can be used even in an environment where there is a lot of dust and dust that could not be used. Further, since the contact 15 is prevented from dropping from the concave surface 11 and the position of the contact 15 with the center of the concave surface 11 has already been performed, a plurality of three-dimensional vibration isolating parts 1 are used, and these are appropriately used. When installing at a position, it is sufficient to simply place it at a desired position,
Since the positional relationship with the other concave surface 11 and the other contact 15 is not considered at all, simplification of the installation work and the like are also achieved.

Further, since the horizontal vibration isolator 10 has an extremely simple structure utilizing the centripetal action of the recessed surface 11 and the contact 15, it can contribute to a reduction in product cost, a reduction in thickness, and a reduction in size. become. Furthermore, the vertical vibration isolator 2
0 is a viscoelastic body 2 arranged so that a force acts in the shearing direction.
The configuration having 1 allows not only to cope with vertical vibration having a large amplitude, but also to contribute to simplification of the structure, thinning, and miniaturization. Furthermore, when a part of each of the components of the horizontal vibration isolating section 10 and the vertical vibration isolating section 20 is shared as described in claim 2, the size and thickness of the product are further reduced. Is achieved. In addition, the viscoelastic body 21 is JIS K
2207-1980 Penetration at 50 g load is 30 to 2
When formed of a silicone gel in the range of 00, the vertical vibration isolating section 20 is provided with excellent high damping characteristics and, depending on the vibration direction in combination with the horizontal vibration isolating section 10 to which the seismic isolation theory is applied. It is possible to provide a three-dimensional vibration isolating part 1 that is extremely versatile. Furthermore, by appropriately selecting or adjusting the number of use, the installation interval, and the installation layout according to the size of the weight of the support A, the three-dimensional direction having various load-bearing and vibration-proof characteristics according to the purpose of use. This makes it possible to prevent vibration.

[Brief description of the drawings]

FIG. 1 is a side view showing a use state of a three-dimensional vibration isolating part of the present invention, and a longitudinal sectional side view showing one of the three-dimensional vibration isolating parts of the present invention in an enlarged manner.

FIG. 2 is an exploded perspective view showing the three-dimensional vibration isolation part of the present invention in an enlarged manner and partially cut away.

FIG. 3 is a vertical sectional side view showing an operating state when horizontal vibration is applied to the three-dimensional vibration isolating part of the present invention.

FIG. 4 is a longitudinal sectional side view showing an operating state when vertical vibrations are applied.

FIG. 5 is a side view showing two embodiments in which the method of using the three-dimensional vibration isolating parts of the present invention is different.

FIG. 6 is a perspective view showing another embodiment in which the shapes of the casing and the support of the three-dimensional vibration isolating part of the present invention are different, and another embodiment in which the shapes of the contactor and the concave surface are different. It is.

FIG. 7 is a vertical sectional side view showing an embodiment in which the positional relationship between the recessed surface and the contactor is reversed, and a state of mounting a sleeve which is desirably used in that case.

FIG. 8 is a longitudinal sectional side view showing another embodiment in which the configuration of the horizontal vibration isolator is different, and FIGS. 1 to 1 also showing a horizontal movement stroke for comparison with this embodiment.
It is a vertical side view of the horizontal vibration isolator of the embodiment shown in FIG.

FIG. 9 shows a concave surface having the same radius of curvature and a sliding contact with the concave surface in order to show the characteristic of lowering the natural frequency when the restoring force is maintained when another embodiment shown in FIG. 8 is applied. A three-dimensional vibration-isolating part having a horizontal vibration-isolating action part composed of a contact, a three-dimensional vibration-isolating part shown in FIG. 8, a concave surface having a radius of curvature set to twice, and a contact slidingly contacting the concave surface FIG. 4 is a longitudinal sectional side view showing a three-dimensional vibration-isolation part having a horizontal vibration-isolation acting part made of the same.

FIG. 10 is a longitudinal sectional side view showing various embodiments of a contact applicable to the three-dimensional vibration isolating part shown in FIG. 8;

FIG. 11 is a longitudinal sectional side view showing two embodiments of means for removing foreign matter that has entered between a concave surface and a contact.

FIG. 12 is a longitudinal sectional side view showing various arrangements of a buffer in two kinds of three-dimensional vibration isolating parts having different positional relationships between a connecting part and a horizontal floating part.

FIG. 13 is a longitudinal sectional side view showing various arrangements of a viscoelastic body suitable for using the three-dimensional vibration isolating part of the present invention in a steady posture.

FIG. 14 is a longitudinal sectional side view showing various arrangement modes of a viscoelastic body suitable for using the three-dimensional vibration isolating part of the present invention in an inverted posture.

FIG. 15 is a longitudinal sectional side view showing a three-dimensional vibration isolating part that can be used as a single item.

FIG. 16 is a longitudinal sectional side view and a perspective view showing two types of conventional seismic structures.

[Explanation of symbols]

 Reference Signs List 1 3D anti-vibration parts 1 'Earthquake-resistant structure 2 Installation plate 4 Support plate 5 3D anti-vibration section 6 Casing 6a Opening 7 Bearing 8 Support 9 Connection section 9a Small diameter section 9b Large diameter section 10 Horizontal vibration isolation section DESCRIPTION OF SYMBOLS 11 Concave surface 12 Horizontal floating part 13 Exclusion hole 15 Contact 16 Centripetal part 17 Exclusion groove 20 Vertical vibration-proof part 21 Viscoelastic body 30 Buffer 31 Horizontal stable surface A Supported member B Dustproof curtain C Roller D Oil damper E Spring G Ground L Guide rail M Iron plate P Slide panel R Rubber plate S Sleeve U Unit

Claims (7)

[Claims] 1. A three-dimensional structure constituted by integrally combining a horizontal vibration isolator that performs horizontal vibration isolation by seismic isolation and a vertical vibration isolator that performs vertical vibration isolation by vibration absorption. A vibration isolator, a casing that covers the three-dimensional vibration isolator, and a bearing that is connected to the casing in a floating state via the three-dimensional vibration isolator. The horizontal vibration isolator in the three-dimensional vibration isolator has a gentle concave surface and a contact that constantly contacts the concave surface, and the relative position between the concave surface and the contact is determined by centripetal action. It is configured to converge to a fixed position, while the vertical vibration isolator has a viscoelastic body that is arranged so that at least a large amount of force acts in the shear direction. Vibration transmitted by self-deformation Three-dimensional anti-vibration parts characterized by being configured to absorb. 2. The horizontal vibration isolating section comprises a horizontal floating section having one of a concave surface and a contact, and a centripetal section having the other of the concave surface and the contact. On the other hand, the vertical vibration isolating section is configured by elastically connecting one of the casing or the support to one of the horizontal floating section and the centripetal section via a viscoelastic body. The three-dimensional anti-vibration part according to claim 1, wherein: 3. The horizontal vibration isolator has a protruding contact having a spherical end surface shape in sliding contact with the concave surface, and has a larger radius of curvature than the contact end surface. And a flat bowl-shaped recessed surface set as described above.
Or the three-dimensional anti-vibration parts described in 2. 4. The horizontal vibration isolator has a spherical contact that is in rolling contact with the concave surface, and two concave surfaces provided to face the contact so as to sandwich the contact. The three-dimensional vibration isolating part according to claim 1 or 2, wherein the concave surfaces are formed in a flat bowl shape so that a radius of curvature is larger than that of the contact. . 5. An opposing surface between the casing and the support, or an opposing surface between the casing and a horizontal floating portion,
It is characterized in that one or both of the casing side and the support body or the horizontal floating portion side is provided with a cushioning member for absorbing a shock when the casing and the horizontal floating portion are excessively close to each other. The three-dimensional vibration isolating part according to claim 2, 3, or 4. 6. A joint surface between the horizontal floating portion and the bearing body for the viscoelastic body, or a joint surface between the centripetal portion and the casing for the viscoelastic body, is provided with a bottom for the bearing member of the horizontal floating portion or for the casing. 6. The three-dimensional vibration isolating part according to claim 2, wherein the part is formed in a tapered shape so as to prevent bottoming of the centripetal portion. 7. The viscoelastic body according to JIS K 2207-
7. The three-dimensional vibration damping part according to claim 1, wherein the part is formed of a silicone gel having a penetration of 1980 and a load of 50 g within a range of 30 to 200.