JPH11182630A - Manufacture for taper type damping material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To have excellent damping operation vertically and horizontally. SOLUTION: A cavity 40 is formed by combining a base 10 (a projecting part 12), a receiving table 20 (a recessed part 22), a fixing jig 30, and a fixing jig 35. Viscous elastic material is flowed into this cavity 40 from a through hole 24, and is heated and hardened. By removing the fixing jigs 30, 35, attaching a screw to the through hole 24, and forming a sealed space 23, a taper type damping material (angle θ = 40-60 degrees) is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a tapered vibration-proof material having excellent load-bearing properties, and in particular, excellent vibration-proof properties against horizontal vibrations.

[0002]

2. Description of the Related Art Conventionally, vibration damping materials for use in various applications have been developed. Thus, a vibration damping action in the vertical direction, a vibration damping action in the horizontal direction, and a vibration damping action in both directions can be considered. For example, vibration damping materials that exhibit a vibration damping effect against compression and shear deformation have been developed and widely used. As such an anti-vibration material, there is provided a structure in which a metal member base and a pedestal having inclined surfaces opposed to each other are used, and a viscoelastic body such as silicone gel or rubber is interposed between the inclined surfaces. ing.

In general, such a vibration isolator is formed by separately forming a metal member and a viscoelastic body, and bonding the inclined surface of the metal member and the inclined surface of the viscoelastic body with an adhesive. It is formed. However, a viscoelastic body that has been molded using a mold in advance may have a mold release agent applied to the mold surface during molding, which may cause the inclined surface to fail to adhere. there were. Moreover, the strength of the adhesive against shearing deformation in the horizontal direction (particularly, along the inclined surface) may be insufficient due to the interposition of the adhesive, which causes a reduction in the reliability of the product.

In order to solve the above-mentioned problem, if a viscoelastic material is poured between the base of the metal member and the pedestal to cure the viscoelastic material, the viscoelastic material is poured into the concave portion of the pedestal. A method of fitting the protrusion of the base from above and curing the base is considered. It is also conceivable to fit the receiving table and the base first, and then to pour it through the gap on the side. In any of these, since the viscoelastic material flows into the space on the bottom surface of the concave portion of the pedestal, the viscoelastic body cannot be formed only on the inclined surface of the base and the pedestal.

Therefore, according to the present invention, a viscoelastic material is poured between metal members to form a viscoelastic body on the inclined surfaces of the base and the pedestal, and it is also possible to secure a closed space and obtain the obtained protection. It is an object of the present invention to provide a method of manufacturing a tapered vibration-proof material in which the vibration-proof material can stably exhibit excellent vibration-proofing properties against vertical and horizontal vibrations over a long period of time.

[0006]

As a result of research to achieve the above object, the present inventor has formed a slanted space by combining a plurality of members, and formed a through hole for a screw of a pedestal with a space above the slanted space. Visco-elastic material and metal members by injecting a visco-elastic material from there, accumulating it on the inclined surface of the inclined gap and curing, and attaching a screw after injection to form a sealed space that acts as a damper Have been formed in advance and found that a viscoelastic body having a desired taper can be formed, and the present invention has been completed.

According to the present invention, as a first aspect, a base having a truncated cone-shaped projection protruding from a substrate, a truncated cone-shaped recess formed in the substrate, and a recess in the substrate are contacted. A space formed in the part and a receiving table having a through hole extending from the side opposite to the side of the concave part forming surface of the substrate to the concave part are fitted in the convex part and the concave part, and the base and the receiving part are A step of fitting a detachable fixing jig around the fitting portion, a step of injecting a viscoelastic material from a through hole of the base into an inclined space formed by the base, the base, and the fixing jig; A method for manufacturing a tapered vibration isolator, comprising: a step of curing an elastic material; a step of removing a fixing jig; and a step of attaching a screw to a through hole formed in a receiving table.

According to a second aspect of the present invention, in the base, the angle formed between the substrate and the inclined surface of the truncated cone-shaped protrusion is 30 to 30 degrees.
A method for manufacturing a tapered vibration isolator according to claim 1, wherein the angle is 80 degrees. The present invention also provides a method for manufacturing a tapered vibration damping material according to claim 1 or 2, wherein the convex portion of the base has a truncated pyramid shape. Further, according to the present invention, there is provided the method of manufacturing a tapered vibration isolator according to claim 1, wherein a hole for suspending a screw is formed on a surface of the base opposite to the surface on which the convex portion is formed. provide.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The manufacturing method of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view partially cut away for explaining members used in the manufacturing method of the present invention, FIG. 2 is a sectional view showing an injection step according to the present invention by assembling the members in FIG. 1, and FIG. Is a sectional view showing a step of assembling the members in FIG. 1 to cure the viscoelastic material according to the present invention, FIG. 4 is a front view showing a tapered vibration isolator obtained by the manufacturing method of the present invention, and FIG. It is a perspective view showing an example of 1 use of a taper type vibration-proof material obtained by a manufacturing method of the present invention.

First, in a first step, a base, a receiving table, and a fixing jig are combined. First, the structure of each member will be described with reference to FIG.

The base 10 has a truncated cone-shaped projection 12 projecting from a substrate 11. This frusto-conical projection 12
The angle between the inclined surface (peripheral surface) and the substrate 11 (the angle θ in the figure) is 30 to 8 in order to achieve the object of the present invention.
It is preferably 0 degree, more preferably 40 to 60 degrees. The angle formed between the convex portion 12 and the substrate 11 is the same, but may form a curved surface, or the angle may be partially different. The inclined surface of the convex portion 12 is preferably a rough surface in order to increase the adhesive force with the viscoelastic material. Such a convex portion 12 may have a truncated pyramid shape of a polygonal pyramid such as a quadrangular pyramid. It is desirable that a vertical wall 13 be provided between the substrate 11 and the projection 12.

The base 10 has a hole 14 for mounting a screw for screwing the tapered anti-vibration material 50 to an object to be applied to the substrate 11 on the side opposite to the surface on which the projection 12 is formed.
Can be formed at the center of the substrate 11.

The base 10 can be formed of metal such as aluminum, plastic, or the like. Its size is
It can be appropriately determined according to the use of the tapered vibration isolator 50.

The pedestal 20 has a truncated conical recess 22 formed in a substrate 21. The shape of the inner peripheral surface of the truncated conical concave portion 22 matches the shape of the convex portion 12 of the base 10. The inner peripheral surface of the concave portion 22 is preferably rough to increase the adhesive force with the viscoelastic material.

The cradle 20 has a space 23 in contact with the concave portion 22 (upper position of the concave portion 22 in practical use), which becomes a sealed space when it becomes a product, and which exhibits a shock absorbing function as a damper. I have. In this space 23, a ventilation hole for adjusting the internal pressure can be formed.

The pedestal 20 has a through-hole 24 extending from the surface of the substrate 21 opposite to the surface on which the concave portion 22 is formed to the space 23. The through hole 24 extends to the concave portion 22 through the space 23, and is used as an injection hole for a viscoelastic material, and is used for attaching a screw to be screwed to an application target of the tapered anti-vibration material 50 in practical use. It is formed as a female screw hole. The through-hole 24 is formed at the center of the cradle 20.

The cradle 20 can be formed of metal such as aluminum, plastic, or the like. Its size is
It is determined according to the size of the base 10.

The fixing jig can be divided into two or more parts in order to make it detachable during use. In FIG. 3, the fixing jig is obtained by dividing a circular jig into two (180).
(Divided by degrees), but the two fixing jigs 30 and 35 do not need to be the same in size, but may be 3 so as to be the same or different in size.
It may be divided into more than divided.

The fixing jigs 30 and 35 are formed with convex flanges 31 and 36 which are continuous in the length direction on the inner peripheral surface side. The convex flanges 31 and 3 of the fixing jigs 30 and 35
The size of 6 and the like, W _1, W ₂ and dimensions of W ₃ may be the same or different, may be the dimensions of L ₁ and L ₂ are identical or different. These dimensions are specifically determined based on the relationship between the base 10 and the cradle 20.

The fixing jigs 30 and 35 can be formed of metal such as aluminum, plastic, ceramics, or the like. A release agent such as silicone oil should be applied to the inner peripheral surfaces (including the convex flange portions 31 and 36) in order to improve the releasability from the viscoelastic material at the time of removal. Is preferred.

Next, the operation procedure of the first step using these members will be described. First, as shown in FIG.
The base 10 and the cradle 20 are connected to the respective convex portions 12 and concave portions 2.
2 and fit. Next, the fixing jigs 30 and 35 are fitted around the fitting portions 15 and 25 between the base 10 and the receiving base 20. The inner peripheral surfaces of the flange portions 31 and 36 of the fixing jigs 30 and 35 abut on the vertical wall 13.

As described above, these four members, the base 1
0, combining the cradle 20 and the fixing jigs 30 and 35
And sheds the viscoelastic material surrounded by them
An inclined gap 40 for filling is formed. This inclined gap 4
The size (capacity) of 0 is fixed as described with reference to FIG.
W of fixed jigs 30 and 35₁, W_TwoAnd W_ThreeDimensions and L ₁
And L_TwoRelated to the dimensions of base 10 and cradle 20
Adjustment to the desired size, etc.
Can be. Also, for example, W₁Adjusting the dimensions of
As a result, the upper surface of the convex portion 12 of the base 10 and the concave portion 2 of
Since the gap (height) with the bottom of 2 is adjusted, the viscoelastic material
Depending on the injection amount of the material 51, the upper surface of
To be formed.

Next, in the second step, the inclined gap 4 formed by the base 10, the receiving stand 20, and the fixing jigs 30, 35 is formed.
At 0 (see FIG. 2), a viscoelastic material 51 is injected from the through hole 24 of the cradle 20. It is desirable to apply a viscoelastic material after applying a primer to the inclined surface of the convex portion 12 and the inner peripheral surface of the concave portion 22 constituting the inclined gap 40 and performing a pretreatment of drying.

The viscoelastic material is not particularly limited as long as it has fluidity such that the pouring operation can be performed at room temperature or under heating, and has a property of hardening at room temperature or under heating. Instead, there may be mentioned rubbers, gels and the like generally used as viscoelastic materials. Examples of the viscoelastic material used in the present invention include silicone rubber and silicone gel. Examples of such a viscoelastic material include TOUGH-2 (trade name: 15 penetration, manufactured by Dow Corning Toray Silicone Co., Ltd.).
6), TOUGH-3 (63 penetration), TOUGH-5
(Penetration 65), TOUGH-6 (Penetration 40), TO
In addition to UGH-7 (degree of penetration 112), TOUGH-8 (degree of penetration 23), KE-105 manufactured by Shin-Etsu Chemical Co., Ltd.
1 and the like.

Next, in a third step, the viscoelastic material 51 injected into the inclined gap 40 is cured. The curing method depends on the injected viscoelastic material 51, and is cured at room temperature or by heating as needed. By the operation in this step, as shown in FIG. 3, a cured product (viscoelastic body) 52 of a viscoelastic material is formed in the inclined gap 40. When the viscoelastic material 51 is injected into the entire surface or a part of the contact surface 45, the viscoelastic body 52 is also formed there.

Next, in a fourth step, the fixing jig 30,
Remove 35. Thereafter, screws 53 are attached to the through holes 24 to make the space 23 a closed space. Before that, liquid can be injected into all or a part of the space 23 in order to enhance the shock absorbing effect. Examples of this liquid include silicone oil. When the ventilation holes are formed in the space 23, the communication holes of the plurality of vibration-proof materials are communicated with each other by a tube or the like so that the gas or the liquid can flow through the space 23 with each other. It goes without saying that a plurality of vibration isolators can be used so that the characteristics of the plurality of vibration isolators can be comprehensively adjusted by interposing a pressure regulating valve, a pump, or the like therebetween.

Next, screws 53 are attached by a conventional method, and the space 23 is made a closed space. When the holes 13 are also provided in the base 10, screws (not shown) are similarly attached. In addition, the bottom surface of the base 10 that contacts the floor surface (installation surface) in practical use can be formed into a shape or material according to the state of the installation place, in addition to screws. In this case, examples of the material include rubber, foamed rubber, foamed plastic, and resin.

Thus, the tapered anti-vibration material 5 of the present invention is obtained.
0 can be obtained. In the tapered vibration isolator 50, the angle formed between the inclined surface of the viscoelastic body 52 and the substrate 11 of the base 10, that is, the angle formed between the viscoelastic body 52 and the floor (installation surface) is in the vertical direction. In order to enhance the vibration damping action in the horizontal direction, the angle is preferably set to 30 to 80 degrees, more preferably 40 to 60 degrees. The space 23 is a closed space formed by the elastic body 52 and the screw 53, and functions as a damper in practical use.

The tapered vibration damping material 50 obtained by the manufacturing method of the present invention is, for example, as shown in FIG.
And screwed to the lower surface of the device with a screw 53 for use. At this time, the bonding force with the installation surface can be increased by applying an adhesive or the like or providing a rubber sheet on the lower surface of the base 10 of the tapered vibration isolator 50.

[0030]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the invention is limited thereto. Example 1 A tapered vibration damper 50 having a structure as shown in FIG. 4 was manufactured. The base 10, the receiving stand 20, and the fixing jigs 30 and 35 are made of aluminum, and TOUGH-8 is used as a viscoelastic material.
And cured by heating at 70 ° C. for 2 hours. The dimensions of each part are as follows: a = 70 mm, b = 50 mm, c
= 20 mm, d = 50 mm, and the angle θ = 50 degrees.

Test Example 1 (Vertical Vibration Test) A case where three taper-type vibration-proof materials 50 obtained in Example 1 were used and vertical vibration was applied by a test device as shown in FIG. Was measured. It should be noted that the tapered vibration isolator 50
Were fixed at an even position in a well-balanced manner and screwed into the lower surface of the weight. The FF in FIG.
T indicates an FFT analyzer. FIG. 7 shows the result. As is clear from FIG.
The weight per unit is 30-60 kg and the vertical resonance point is 2
The frequency was 0 to 15 Hz, and showed a damping effect on vibration in the vertical direction.

Test Example 2 (Horizontal Vibration Test) A case where three tapered vibration-isolating materials 50 obtained in Example 1 were used and horizontal vibration was applied by a test apparatus as shown in FIG. Was measured. It should be noted that the tapered vibration isolator 50
Were fixed at an even position in a well-balanced manner, and screwed into the lower surface of a weight (400 mm in diameter and 160 mm in thickness). As a result, when the weight per unit was 50 kg, resonance points existed at 9 Hz and 26 Hz. The resonance point at 9 Hz is the vibration due to the roll of the weight, and the resonance point at 26 Hz is the vibration in the horizontal direction.

[0033]

According to the manufacturing method of the present invention, the viscoelastic material is injected into the inclined gap formed by combining a plurality of members from the through hole of the pedestal and hardened, and a screw is attached after the injection to form a closed space. As a result, the adhesiveness between the viscoelastic material and other members is good, and a vibration-proof material having a tapered shape and having a closed space can be obtained. The tapered anti-vibration material obtained by the production method of the present invention is not only a vertical vibration such as compression and shear deformation, but also exhibits an excellent anti-vibration action against horizontal vibration, It can be used in various fields, for example, as a vibration isolator on a floor of a train, a showcase, and the like.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view partially cut away for explaining members used in a manufacturing method of the present invention.

FIG. 2 is a sectional view illustrating an injection step according to the present invention by assembling the members in FIG. 1;

FIG. 3 is a sectional view showing a step of assembling the members in FIG. 1 and curing a viscoelastic material according to the present invention.

FIG. 4 is a front view showing a tapered vibration isolator obtained by the manufacturing method of the present invention.

FIG. 5 is a perspective view showing an example of use of a tapered vibration isolator obtained by the manufacturing method of the present invention.

FIG. 6 is a conceptual diagram showing a method of a vertical vibration test of a tapered vibration isolator obtained by the manufacturing method of the present invention.

FIG. 7 is a diagram showing the results of a vertical vibration test.

FIG. 8 is a conceptual diagram showing a method of a horizontal vibration test of a tapered vibration-proof material obtained by the manufacturing method of the present invention.

[Brief description of reference numerals]

 DESCRIPTION OF SYMBOLS 10 Base 11 Substrate 12 Convex part 13 Vertical wall 14 Hole 15 Fitting part 20 Receiver 21 Substrate 22 Concave part 23 Space 24 Through hole 25 Fitting part 30, 35 Fixing jig 31, 36 Collar part 40 Inclined gap 50 Tapered type Vibration isolator 51 Viscoelastic material 52 Viscoelastic body 53 Screw

Claims (4)

[Claims] A base having a truncated cone-shaped protrusion protruding from the substrate; a truncated cone-shaped recess formed in the substrate;
A space formed in a portion in contact with the concave portion inside the substrate, and a pedestal having a through hole reaching the space from the opposite surface side to the concave portion forming surface side of the substrate, and fitted in the convex portion and the concave portion, A step of fitting a detachable fixing jig around a fitting portion between the base and the receiving base, and a viscoelastic material from the through-hole of the receiving base into an inclined gap formed by the base, the receiving base and the fixing jig. , A step of hardening the viscoelastic material, a step of removing the fixing jig, and a step of attaching a screw to a through hole formed in the receiving table. 2. The method of manufacturing a tapered vibration isolator according to claim 1, wherein an angle between the substrate and the inclined surface of the truncated cone is 30 to 80 degrees. 3. The method according to claim 1, wherein the projections of the base are truncated pyramids. 4. A hole for suspending a screw is formed on a surface of the base opposite to the surface on which the convex portion is formed.
A method for producing the tapered vibration isolator according to the above.