JP2863804B2 - Insulator with porous silicone gel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Object of the Invention><Industrial Application Field> The present invention relates to precision equipment, optical equipment, medical equipment, audio equipment,
The present invention relates to an insulator that, when incorporated in an OA device, blocks transmission of external vibrations to the inside, or blocks transmission of vibrations generated inside to the outside.

<Background of the Invention> In recent years, the vibration absorption property of a gel-like substance has been evaluated, and an insulator using this substance has been developed. However, the conventional insulator is filled with a low-hardness silicone gel in a cylindrical support, and this silicone gel has low tensile strength and is soft, so that handling is inconvenient. In addition, the low-hardness silicone gel has a drawback that it is difficult to adhere to other members, and has a large Poisson's ratio. When a large load is applied, the silicone gel expands laterally, and the elastic coefficient sharply increases. For this reason, the material of the cylindrical support has been limited to expensive but excellent properties such as silicone rubber. Furthermore, when a silicone gel having a low hardness is used, buckling and lateral sway are large, and there are problems in mounting clearance and vibration isolation performance.

On the other hand, apart from the insulator, the outer side is made of a hard material, a gel-like substance is provided in the shape of a disc spring inside, and the gel-like substance further supports an engagement piece for connection with a vibration source. Has been developed, but such an insulator also has a problem such as roll.

<Technical matters attempted to be developed> The present invention has been made in view of such a background, and by applying a silicone gel porous body to the vibration absorbing portion, the strength can be reduced without reducing the vibration absorbing performance. sex,
An attempt was made to develop an insulator provided with a porous silicone gel which improved the handleability and the adhesiveness, reduced the Poisson's ratio, and reduced buckling and rolling.

<< Structure of the Invention >><Means for Achieving the Object> The insulator provided with the porous silicone gel according to the first invention of the present application is a feature.

Further, in the insulator having a porous silicone gel according to the second invention of the present application, in addition to the above requirements, the buffer portion is provided in a cylindrical shape along the cylindrical support, and the center of the buffer portion is provided. And the above-mentioned holding portions are combined.

Further, the insulator comprising a porous silicone gel according to the third invention of the present application further comprises a mounting plate at one or both of an upper end and a lower end of the cylindrical support in addition to the above requirements. The holding portion is formed integrally with the mounting plate.

Still further, according to a fourth aspect of the present invention, there is provided an insulator comprising a porous silicone gel, wherein the insulator comprises a vibration absorbing portion inside a resiliently deformable cylindrical support. And a partition plate made of a hard material so as to divide the vibration absorbing portion into upper and lower portions.

Furthermore, an insulator provided with a porous silicone gel according to the fifth invention of the present application is a porous rigid body formed in a hollow hard bearing body, which is formed in a thick disk spring shape toward the upper side of its axis. A buffer made of an elastic silicone gel, the upper part of which is supported with an engagement piece, while the lower part of the buffer is provided with a holding part made of a hard material which is difficult to deform in the lateral direction. It is characterized by the fact that

The present invention aims to achieve the above object.

<Function of the Invention> In the present invention, since the vibration absorbing portion is provided with a buffer portion made of a porous silicone gel, the vibration absorbing portion has a large vibration absorbing effect as compared with the case where a non-porous silicone gel is applied, and Lightweight.

Further, since the vibration absorbing portion is combined with a holding portion made of a hard material and hardly deformed in the lateral direction, almost no rolling occurs.

<Example> Hereinafter, the present invention will be specifically described based on an illustrated example. FIG. 1 shows a state in which an insulator 1 provided with a porous silicone gel according to the present invention is attached to a device U that is vulnerable to vibration or a foot of an electric motor T that is a vibration source.

The insulator 1 has a substantially cylindrical tubular support body 2 having edges 3a and 3b formed at both ends, and a shape retaining ring 4 and a lower mounting plate 5 at both edges 3a and 3b, respectively.
And an upper mounting plate 6 is further provided on the side of the shape retaining ring 4, while a vibration absorber 7 is provided inside the cylindrical support 2. For convenience, the side where the shape retaining ring 4 is provided will be referred to as the upper side, and the side where the lower mounting plate 5 is provided will be referred to as the lower side. The cylindrical support 2 is made of soft rubber, which itself has a vibration absorbing function, but its essential function is the overall shape retention of the insulator 1 and the vibration absorbing portion 7.
In the protection of. Therefore, the cylindrical support 2 may be made of a material that does not necessarily have a vibration absorbing function. The shape retaining ring 4 is bonded to the upper edge portion 3a to give the edge portion 3a a shape retaining property, or is interposed between the upper mounting plate 6 and the edge portion 3a to improve the adhesion between the two. And made of a relatively hard material having shape retention properties such as metal plastic.
The shape retaining ring 4 may be provided on the lower edge 3b. Further, since the shape retaining ring 4 is provided for the above purpose, it is not necessarily required when these problems can be solved by other methods. Further, the lower mounting plate 5 adheres to the lower edge 3b and substantially serves as a lower lid. The lower mounting plate 5 is provided with a mounting portion 8 having a male screw formed at the center thereof. The structure of the mounting portion 8 may be a female screw or a bracket. Incidentally, the mounting portion 8 is provided for connection to a device U that is vulnerable to vibration or an electric motor T that is a vibration source.

Next, the vibration absorbing unit 7 to which the present invention is substantially applied will be described. The vibration absorbing section 7 is formed by combining a buffer section 9 made of porous silicone gel and a holding section 10 made of a hard material and hardly deformed in the lateral direction. In the present embodiment, specifically, as shown in FIGS. 1 to 3, a cylindrical holding portion 10 is combined with a cylindrical buffer portion 9 made of silicone gel so as to form a space portion 11 at the center in the center. Has a structure that is The combination of the buffer 9 and the holder 10 can take various forms, which will be described later. Here, the description of the silicone gel and the method of making the silicone gel porous will be described first in relation to the porous silicone gel.

Silicone gel is made of a dimethyl siloxane component units, undiluted serving diorganopolysiloxane silicone gel used in the following formula [1] (hereinafter referred to as component _{^{A): RR 1 2 SiO (R}} 2 2 SiO) n SiR 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 (R ^At least 50 mol% of 2 is a methyl group, and when it has an alkenyl group, its content is
And n is a number such that the viscosity of this component at 25 ° C. is 100 to 100,000 cSt.]
And an organohydrogenpolysiloxane (component B), which is a stock solution of a silicone gel having a viscosity of not more than 5000 cSt at 25 ° C. and having hydrogen atoms directly bonded to at least three Si atoms in one molecule, and The mixture is adjusted so that the ratio (molar ratio) of the total amount of alkenyl groups contained in component A to the total amount of hydrogen atoms directly bonded to Si atoms in component B is 0.1 to 2.0. This is an addition reaction type silicone copolymer obtained by the above method. The component A has a linear molecular structure. The alkenyl group R at both ends of the molecule is added to a hydrogen atom directly bonded to a Si atom in the component B to form a crosslink. A compound capable of forming a structure. The alkenyl group present at the molecular terminal is preferably a lower alkenyl group, and a vinyl group is particularly preferable 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, and specific examples of such a group include alkyl groups such as methyl group, propyl group and hexyl group, and vinyl groups. Lower alkenyl groups. However, at least 50 mol% of R ² is a methyl group, when R ² is an alkenyl group is preferably an alkenyl group is the amount of 10 mol% or less. When the amount of the alkenyl group exceeds 10 mol%, the crosslink density becomes too high and the viscosity tends to be high. N is 25 ° C. of the component A
Viscosity is usually 100 to 100,000 cSt, preferably 200
It is set to be within the range of ~ 20,000cSt. The component B is a crosslinking agent for the component A, and the hydrogen atom directly bonded to the Si 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 SiO
Copolymer siloxane consisting of 1/2 unit and SiO 4/2 unit,
And HR ¹ ₂ SiO 1/2 units and R ¹ ₃ can be exemplified a copolymer siloxane consisting of SiO 1/2 units and SiO 4/2 units. However, in the above formula, R ¹ has the same meaning as described above. The ratio of the total molar amount of the alkenyl groups in the component A to the total molar amount of the hydrogen atoms directly bonded to Si in the component B is usually 0.1 to 2.0, preferably 0.1 to 1.0. It is manufactured by mixing and hardening the A component and the B component so as to be as follows. 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 generally used in an amount of 0.1 ppm or more, preferably 0.5 ppm or more, based on the total weight of the component A and the component B. 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. Here, compounds such as sulfur, phosphorus, tin-based compounds and amines easily react with the platinum-based catalyst,
It is a so-called catalyst poison that inhibits crosslinking and curing. These include, specifically, sulfur compounds such as potassium sulfate, ammonium sulfate, ammonium persulfate, sodium persulfate, sodium sulfite,
Sulfur salts such as hydrosulfide, sulfur hydroxyamine, sulfur, carbon disulfide, sodium sulfoxylate (Rongalit), thioglycolic acid such as butyl thioglycolate and derivatives thereof, mercaptan compounds such as β-mercaptopropionic acid, thioacetic acid Surfactants such as thiourea, sulfonate and sulfate. Examples of the phosphorus-based compound include phosphoric acid such as phosphoric acid, ammonium phosphate, sodium hypophosphite, sodium metaphosphate, sodium metaphosphate, and sodium tripolyphosphate, and salts thereof, trimethyl phosphate, dialkyldithiophosphoric acid, and phosphite. Can be Further, the tin compound includes various tin chlorides and tin oxides, and other examples include rhodan salts and stannous sulfate. Examples of the amine compound include iminobispropylamine, triethylamine, 3-diethylaminopropylamine, tetramethylethylenediamine, and
-Methoxypropylamine and the like. Then, the above-mentioned component A, component B and the catalyst are mixed and left to stand at room temperature or heated to be cured to form the silicone gel used in the present invention. When curing by heating, the heating temperature is usually 50 to 160 ° C. The silicone gel thus obtained is JIS K (K-2207)
(1980 50 g load) usually has a penetration of 5 to 250. With the hardness of such a silicone gel, the amount of the component A can form a crosslinked structure with hydrogen atoms directly bonded to Si in the component B. As another method, it can be adjusted by previously adding a silicone oil having methyl groups at both ends in an amount within the range of 5 to 75% by weight based on the obtained silicone gel. The silicone gel can be adjusted as described above,
Also, commercially available products can be used. Examples of commercially available products that can be used in the present invention include CF502
7, TOUGH-3, TOUGH-4, TOUGH-5, TOUGH-6 (all manufactured by Toray Dow Corning Silicone) and X32-902
/ cat1300 (manufactured by Shin-Etsu Chemical Co., Ltd.), F250-121 (manufactured by Nippon Yunika Co., Ltd.) and the like. In addition, in addition to the above-mentioned 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.

As a method for making such a silicone gel porous, a drying shrinkage method, an elution method, a microwave heating method, a heating disappearance method, or the like can be applied. The drying shrinkage method is a method in which swollen granules mixed in a silicone gel are dried and shrunk, and are removed from traces of the swollen body. The elution method is a method in which soluble particles are mixed in a silicone gel and cured, and then the particles are eluted in a solvent to form a trace. Incidentally, as a combination of the particles to be eluted and the solvent, particles of sodium chloride and water are generally used. Furthermore, in the microwave heating method, a volatile liquid having a large dielectric loss coefficient is dispersed in a silicone gel, and after the gel is cured, the liquid is heated in a high-frequency electric field by dielectric heating to elevate the temperature and vaporize the liquid. In addition to the expansion, the silicone gel stock solution is cross-linked and cured. Furthermore, in the heat-dissipating method, a heat-dissipating substance is mixed in a silicone gel, and the silicone gel is heated to dissipate the heat-dissipating substance, thereby forming pores in the portion where the heat-dissipating substance was present. Is the way. In addition, a method in which a sublimable substance such as naphthalene or dry ice is mixed in the silicone gel stock solution and heat is applied to sublimate the sublimable substance can be applied.

In this example, an elution method in which water was used as a solvent and sodium chloride particles were eluted was applied. This will be specifically described below. First, as the sodium chloride used, a commercially available crystal having a substantially uniform cubic shape of about 0.4 mm was used. The components A and B are distributed and mixed so that the weight ratio of the sodium chloride to the stock solution of the silicone gel is 2: 1. The components A and B are mixed with a catalyst, and the mixture is poured into a mold and heated. Let it cure. In this embodiment, since the cushioning portion 9 is cylindrical, the shape of the cushioning portion 9 may be directly formed by using a molding die corresponding thereto. It may be removed and formed into a cylindrical shape. In order to remove air taken in at the time of mixing, it is desirable to perform vacuum degassing before curing. If the amount of the stock solution of the silicone gel is somewhat larger than that of the sodium chloride, the sodium chloride is naturally cured during the curing, and is sequentially deposited from the bottom of the stock solution of the silicone gel. The gel hardens in a state where it is filled with the stock solution of the gel. Alternatively, when pressed from above and below during this time, an excessive amount of the silicone gel stock solution with respect to the sodium chloride is squeezed out, overflows from there, and hardens in a state where an appropriate amount of the silicone gel stock solution exists between the sodium chlorides. Thus, if left at 80 ° C. for 1 hour, for example, the component A and the component B react with each other to obtain a cured product in which sodium chloride is deposited at a substantially high density. When the amount of the stock solution of the silicone gel is larger, a layer composed of only the silicone gel is formed on a part of the surface layer. When the specific gravity ratio between the sodium chloride and the stock solution of the silicone gel is about 2: 1 as in the present embodiment, a layer consisting only of the silicone gel is not formed on the surface layer, and the entire surface of the silicone gel in which sodium chloride is dispersed is formed. Layer. Conversely, when the amount of sodium chloride increases, mixing with the stock solution of the silicone gel and vacuum degassing operation become difficult,
Since the portion occupied by sodium chloride serving as pores increases, a net structure having a thinner finished structure can be obtained.
In practice, the weight ratio of the weight of sodium chloride to the stock solution of silicone gel is preferably 1.5: 1 to 4: 1, preferably about 2: 1.
Next, the cured silicone gel in a state where sodium chloride is dispersed is taken out of the mold, and put into a bath in which warm water is stirred. Then, boiling was repeated while changing the hot water several times, and then the hot water was cut off and dried.If the sodium chloride was present in the silicone gel, pores were formed as traces of removal, and pores were formed as open cells. Thus, a denatured cylindrical buffer section 9 is obtained. In general, a skin layer tends to be formed on a portion hardened by contact with a mold, and this disturbs elution of sodium chloride. Therefore, the dimensions of the buffer portion 9 are calculated in advance, and a slightly larger buffer portion 9 is formed. If sodium chloride is eluted by peeling the skin layer after making it and piercing or crushing the surface layer, the internal sodium chloride is exposed and the elution can be carried out earlier by that amount.

Next, the holding unit 10 will be described. This is provided to prevent the vibration absorbing portion 7 from rolling, and includes various rubbers, soft synthetic resins, hard gels, and even hard synthetic resins.
It is made of a hard material such as metal which is difficult to deform in the lateral direction. The space 11 formed above the holding portion 10 functions as a deformation region of the porous silicone gel, and the upper mounting plate 6 hits the holding portion 10 when a large load is applied to the insulator 1 from above. This is for preventing the vibration absorbing action from decreasing.

The insulator 1 provided with the porous silicone gel according to the present invention has the above-described structure, and is used, for example, by attaching it to the foot of a vibration source. Thereby, the vibration from the vibration source is absorbed and attenuated by the buffer unit 9 in the vibration absorbing unit 7. In this case, the holding portion 10 of the vibration absorbing portion 7 acts like a mandrel, so as to prevent the vibration absorbing portion 7 from rolling.

Next, another embodiment in which the structure of the vibration absorbing section 7 is changed will be described. First, in the above embodiment, the holding portion 10 is provided at the lower center of the cylindrical buffer portion 9, but as shown in FIG. 4 (a), the holding portions 10 are provided above and below the hollow portion of the buffer portion 9, and both holding portions are provided. Department
A space 11 may be formed between the 10. In addition, as this kind of structure, in addition to this, the holding portion 10 may be provided above the hollow portion of the buffer portion 9 to make the lower portion a space portion, or it may be provided at the center to make the upper and lower portions a space portion. It is possible. In each of the above embodiments, the space portion 11 is formed. However, as shown in FIG. 4B, the space portion 11 of the embodiment shown in FIG. May be filled. In addition, the fourth
As shown in FIG. 3C, the shape of the holding unit 10 may be a truncated cone. In the case where the space 11 is not provided as described above, when a large load is applied from above, the silicone gel between the two holding portions 10 is compressed and reaches the compression limit, and the amount of change decreases nonlinearly. I do. Therefore, it is desirable that the porous silicone gel existing between the two holding portions 10 be constituted by a material having an increased ratio of voids. Further, as shown in FIGS. 4D and 4E, the holding portion 10 may be formed by deforming a part of the mounting plate. That is, FIG. 4 (d)
FIG. 4 (e) shows the holding portion 10 formed by pressing the center portion of the upper mounting plate 6 in the form of a button, and FIG. 4 (e) shows the mounting portion 8 with respect to the lower mounting plate 5. The solid holding portion 10 is integrally formed on the surface on the opposite side of the above. Further, a coil spring can be applied as the holding unit 10. FIG. 4 (f) shows an example in which a coil spring 12 is welded to the lower mounting plate 5 on the surface opposite to the mounting portion 8, and a porous silicone gel is filled so as to wrap the coil spring 12. Thus, the buffer portion 9 is formed. Incidentally, the coil springs may be provided independently on each of the upper mounting plate and the lower mounting plate, and the portion where the coil spring exists may be hollow. In order to further enhance roll prevention,
As shown in FIG. 4 (g), a cylindrical holding portion is provided on the lower mounting plate 5 side.
10a may be formed, and a fitting holding portion 10b which is slidably fitted inside the cylindrical holding portion 10 may be formed on the upper mounting plate 6 side. By the way, if such a structure is adopted, since the cylindrical holding portion 10a and the fitting holding portion 10b are fitted, the parallelism between the upper mounting plate 6 and the lower mounting plate 5 is maintained, and the roll can be prevented. It will be strengthened. In addition, if such a form is employed, the space 11 surrounded by the inner surface of the cylindrical holding portion 10a and the end of the fitting holding portion 10b acts as an air damper, so that the vibration absorbing capability of the insulator as a whole is also increased. .
Further, for example, a plurality of holding portions 10 may be formed from the upper mounting plate 6, and a plurality of holding portions 10 formed from the lower mounting plate 5 may be combined. Further, the holding portion 10 can be formed in a cylindrical shape.

Next, a description will be given of an embodiment in which the insulator 1 having a porous silicone gel has a slightly special anti-rolling structure. First, the one shown in FIG. 5 (a) is provided with a substantially spherical buffer portion 9 at the center of the cylindrical support 2, and a holding portion 10 above and below the buffer portion 9 so as to cover the buffer portion 9.
A space portion 11 is formed between upper and lower holding portions 10.
Incidentally, in the insulator 1 having such a structure, since the cushioning portion 9 and the holding portion 10 are in contact with each other with a spherical surface, the applied force acts as a vibration absorbing member, so that the buckling hardly occurs. FIG. 5 (b) shows a configuration in which a partition plate 13 is provided so as to divide the vibration absorbing portion 7 filled with porous silicone gel in the middle of the cylindrical support 2 into upper and lower portions. The partition plate 13 is formed of a hard material having shape retention such as a metal plate or a hard synthetic resin plate. Incidentally, in the insulator 1 having such a structure, the partition plate 13 divides the vibration absorbing portion 7 into two stages, so that the entire buckling is hardly generated. Further, a structure in which the vibration absorbing portion 7 is divided into three or more stages by using a plurality of partition plates 13 may be employed. FIG. 6 shows a further development of the technical concept of the present invention, which is formed in a hollow hard bearing 14 in the shape of a thick disc spring facing upwardly above its axis. A buffer 15 made of a porous silicone gel is provided. A pipe 15 is provided at a raised portion of the buffer 9, and a pipe 15 is provided in the pipe 15 to serve as a mounting portion for mounting to a vibration source. A screw 16 as an engagement piece is provided. Below the buffer portion 9, a holding portion 10 made of a hard material and difficult to deform in the lateral direction is provided. The holding portion 10 is made of the same material as that of the above-mentioned various embodiments, and has the same function. Incidentally, the insulator 1 having such a structure has a linear load-strain characteristic and excellent vibration damping properties. Therefore, by applying a porous silicone gel to the buffer portion 9, the vibration is further damped. The efficiency is improved, and the holding section 10 provided above the buffer section 9 reduces the lateral swing of the buffer section 9.

<< Effects of the Invention >> In the present invention, since the porous silicone gel is applied to the buffer portion 9, a silicone gel having a higher hardness can be used by taking advantage of the flexibility caused by the porous structure. Therefore, strength and handleability are improved, and the Poisson's ratio can be reduced.

In addition, since the buffer portion 9 is porous, the adhesive easily adheres, and the adhesiveness with the mounting plates 5 and 6 and the cylindrical support 2 is improved.

Furthermore, the conventional insulator uses a low-hardness silicone gel.As a result, the Poisson's ratio is large and the lateral spread is large.If the properties of the cylindrical support are poor, the elastic modulus of the gel rises sharply and the cylindrical shape increases. The pulling force of the support also increased rapidly. However, in the present invention, since a silicone gel having a high hardness can be used, there is almost no need to rely on the strength of the cylindrical support 2, and an inexpensive rubber having not necessarily excellent characteristics is applied to the cylindrical support 2. be able to.

Further, in the present invention, the buffer portion 9 is combined with a holding portion 10 made of a hard material and difficult to deform in the lateral direction, or a partition plate 13 made of a hard material is provided so as to divide the vibration absorbing portion 7 up and down. Is provided with a holding portion 10 made of a hard material and difficult to deform in the lateral direction at a lower portion of the buffer portion 9 formed in a thick disc spring shape, so that buckling and rolling are small even when a large load is applied, Therefore, there is no need to provide a large mounting clearance, and there is no effect on vibration isolation performance.

[Brief description of the drawings]

Fig. 1 is a perspective view showing the insulator and the internal structure of the insulator provided with the porous silicone gel of the present invention in an enlarged and broken view, Fig. 2 is an exploded perspective view of the same, and Fig. 3 is a vertical sectional side view of the same. FIG. 4 is a longitudinal sectional side view showing various embodiments in which the shape of the buffer portion or the holding portion is different from the above, and FIG. 5 shows an embodiment in which the buffer portion and the holding portion are engaged and the buffer portion is laminated. FIG. 6 is a longitudinal sectional side view showing an embodiment in which a force acts on the buffer portion in the shearing direction. 1; insulator 2; cylindrical support 3a, 3b; edge 4; shape retaining ring 5; lower mounting plate 6; upper mounting plate 7; vibration absorbing portion 8; mounting portion 9; buffer portion 10; holding portion 10a; cylinder Shape holder 10b; Fitting holder 11; Space 12; Coil spring 13; Partition plate 14; Hard bearing 15; Pipe 16; Screw T; Motor U: Vibration-sensitive device

Continuation of the front page (56) References JP-A-1-182644 (JP, A) JP-A-61-149634 (JP, A) JP-A-61-105318 (JP, A) Jpn. , U) Fully open 1988-133656 (JP, U) Fully open 1988-171740 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F16F 13/00

Claims (5)

(57) [Claims] 1. An insulator comprising a vibration-absorbing portion provided inside an elastically-deformable cylindrical support, wherein said vibration-absorbing portion is made of a porous silicone gel, and is made of a hard material. An insulator provided with a porous silicone gel, characterized by being combined with a holding portion that is difficult to deform. 2. The porous structure according to claim 1, wherein said buffer portion is provided in a cylindrical shape along said cylindrical support, and said holding portion is combined with a center of said buffer portion. Insulator with silicone gel. 3. An attachment plate is provided at one or both of an upper end and a lower end of the cylindrical support,
3. The insulator having a porous silicone gel according to claim 1, wherein the insulator is formed integrally with the holding portion or the mounting plate. 4. An insulator having a vibration absorbing portion inside an elastically deformable cylindrical support, wherein the vibration absorbing portion is made of porous silicone gel, and the vibration absorbing portion is vertically divided. An insulator provided with a porous silicone gel, provided with a partition plate made of a hard material. 5. A hollow hard bearing body is provided with a buffer portion made of a porous silicone gel formed in the shape of a thick disc spring and directed upwardly of its axis, and an upper portion of the buffer portion is provided. An insulator provided with a porous silicone gel, characterized in that an engagement piece is supported, while a lower portion of the cushioning portion is provided with a holding portion made of a hard material and difficult to deform in the lateral direction.