JPS5835701A - Insulator - Google Patents

Abstract

PURPOSE:To improve the performance of vibration isolation, by using a new rubber member having a very low hardness and a high impact resilience and forming the contact surface with other members as a specific shape. CONSTITUTION:A rubber member is used, which has <=30 deg. of hardness by the A type rubber durometer and >=15 deg. of hardness by the F type rubber durometer and the impact resilience of which is >=50%. A plurality of projections 4 are provided to the side of the member of the contact surface between a mounting plane 3 and a plane 2 to be supported so as to obtain line or point contact substantially, and a flange part 6 is formed at the outer circumference of the main body.

Description

[Detailed Description of the Invention] More specifically, it is made of a new rubber material with ultra-low hardness and high rebound elasticity, and has a special shape for the contact surface with other parts, so it has excellent vibration isolation properties, and has excellent vibration isolation properties. ．． This invention relates to an incillator that effectively isolates vibrations.

Rubber insulators have long been known for use in record players, etc.

However, conventional rubber insulators have poor vibration isolation properties, especially in the ultra-low frequency range after 5 to 10 Hsl.Therefore, even if such conventional rubber insulators are used in record players, external vibrations cannot be prevented. It was not possible to effectively isolate the sound, and therefore it was not possible to prevent howling or deterioration in sound quality caused by external vibrations, and the faithful reproduction of the original sound could not be desired.

In view of these points, the present inventors have developed a new rubber material that has excellent vibration isolation properties and is useful as a material for I"shicierators, etc.
We have developed a rubber material that has a hardness of 15° or more on a III rubber hardness needle of 0° or less, and a rebound modulus of 50 or more, and filed Japanese Patent Application No. 55-164192).

However, if this rubber material is used to create an insulator with a plate-shaped main body and protrusions that can make line or point contact with other members to reduce the contact area, the load will be significantly large. There was a fear that the entire insulator would be deformed and, in particular, the protrusions would be compressed and would no longer be able to make contact or point contact, and that the excellent properties of the specific rubber material would not be fully utilized.

In view of the above points, the present invention provides an insulator in which the entire insulator and the protrusions are not easily deformed even under heavy loads, and which can fully utilize the excellent properties of the certain rubber material. .

That is, the present invention is made of a rubber material which is a vulcanized product of rubber and has a hardness of 30e or less as a rubber hardness needle and 15' or more as a dirt rubber hardness needle. The present invention relates to an insulator characterized in that one side is provided with a large number of protrusions that can substantially make line or point contact with other members, and the outer shoulder portion of the main body is provided with a 7-rank portion.

The insulator of the present invention is characterized by using a specific rubber material as a constituent material and having a specific shape for the contact surface with other members.

In the above, the M type rubber hardness needle is 6301-
This is a rubber hardness needle specified in 1969.

Furthermore, the ym rubber hardness needle refers to a rubber hardness meter Asker Model 1 manufactured by Kobunshi Keiki ■, which is mainly used for measuring the hardness of 7 ohm laper 1 urethane foam and the like. Although the rubber material used in the present invention is solid rubber, its hardness is extremely low, and there are some materials that cannot be measured with the rubber hardness needles used to measure the hardness of solid rubber. The lower limit of the hardness of the rubber material is defined by the hardness measured with a rubber hardness needle.

Also, the hardness between the rubber hardness needle and the rubber hardness needle is 0.
may be measured with a rubber hardness needle. The 0-type rubber hardness needle is defined by the Japan Rubber Association Standard 3RIS-0101, and is used to measure hardness between the M-type rubber hardness needle and the F-type rubber hardness needle. .

Mainly used to measure the hardness of sponges and soft rubber.

As the ON rubber hardness needle, a rubber hardness meter Asker-0 model manufactured by Kobunshi Keiki ■ was used.

The hardness of the rubber material used in the present invention may be measured with any rubber hardness needle, as long as it can be titrated with any of the rubber hardness needles, type 0 rubber hardness needles, and type 1 rubber hardness meters.
However, if the hardness is less than 1° with a rubber A111 degree needle, there will be a large measurement error if you use an All rubber hardness needle.
It is preferable to measure with an m rubber hardness needle or a type 1 rubber hardness needle. Similarly, if the hardness is 1° or less with an am rubber hardness needle, it is preferable to measure with an insect rubber hardness needle. Also OII
If the hardness is 99° or more with a rubber hardness needle, it is preferable to measure with a rubber hardness needle.

Similarly, if the hardness is 99° or more with a type 1 rubber hardness needle,
It is preferable to measure with a g-rubber hardness needle or an A-type rubber hardness needle. In the following, the hardness measured by 1 lffl using a rubber hardness meter, an ail rubber hardness needle, and a lid rubber hardness needle is referred to as a rubber hardness, an O hardness, and a v hardness, respectively.

The rubber material used in the present invention has a hardness of 30° or less, preferably 20' or less, and 1 hardness of 100 or less.
5° or more, or more (30° or more, and the rebound modulus is 50% or more, preferably 60% or more, or less)
Although vulcanized rubber has a rubber physical property of 70 or more, no practical rubber material having such rubber physical properties has been known to date. In other words, in the case of conventional practical rubber materials, the hardness is 3.
If the angle is 0° or less, the rebound modulus is less than 40, for example, about 10 to 20. Conventionally, when the hardness of the vulcanized rubber is lowered, the rebound modulus is also lowered accordingly. 10. or less, and the rebound modulus is 50≦ or more, preferably 60% or more, and <70≦
A practical rubber material having the above-mentioned rubber physical properties cannot be predicted from the prior art.

The rubber material used in the present invention has excellent vibration isolation properties, particularly vibration isolation properties in the ultra-low frequency range as described above, due to the unique rubber physical properties described above.

However, the above-mentioned excellent vibration isolation properties are obtained when the hardness is less than 50°, preferably less than 20", and less than 10".
Hardness of 15° or more, especially 30 or more, 2
This is achieved by a vulcanized rubber having a specific physical property value such that the rebound modulus is 50% or more, preferably 60≦ or more, and especially <70≦ or more. If the hardness and rebound modulus are out of the above range, the vibration isolation properties will be poor, which is undesirable. In addition to the above physical properties, the rubber material used in the present invention has a tensile strength of approximately 0.1 to 100 kV/6 m", especially 'j
<1~50kg/am'', expansion 5o~10oo%,
It is preferable that the content is <200% to 1000%.

The vulcanized rubber having the above-mentioned specific physical properties is rubber component 1.
00 parts (parts by weight, hereinafter the same), 俤) Factice 5-20
00 copies, preferably 50 to 2000 copies, <10
0 to 2000 parts and (o) 20 to 2000 parts of a softener,
Preferably 100-2000@s (200-2
It is obtained by vulcanizing a rubber composition consisting of 1,000 parts. A rubber composition formed by blending a large amount of 7actis and a softener with such a rubber component is a new rubber composition, and by vulcanizing such a new rubber composition, the hardness can be reduced to 30° or less on the Mu hardness, Preferably 20' or less, where the hardness is less than 10°, and where the hardness is 150 or more, where the hardness is less than
For the first time, it is possible to obtain a specific vulcanized rubber having an elasticity of 30e or more and a rebound modulus of 50≦ or more, preferably 601 or more, especially ≦70%m or more.・Although it is known to heal, it does not contain actis and bleeds heavily, making it impractical. In the present invention, by blending a large amount of 7 atatis with a large amount of softener into the rubber component, bleeding is suppressed and the specific vulcanized rubber with low hardness and high impact resilience is obtained.

The rubber components of component (4) include, but are not limited to, polynorbornene, natural rubber, isoprene rubber, rigoroprene rubber, styrene-butadiene rubber, butadiene rubber, butyl rubber, ethylene-propylene rubber, ethylene-propylene-diene rubber, and nitrile rubber. , acrylic rubber, urethane rubber, chlorinated ethylene, polysulfonated ethylene, hydrin rubber, polysulfide rubber, and silicone rubber. Also includes those recycled rubbers (for example, rubber powder, etc.).These rubber components may be in solid form (powder, pellets, vines, sheets, etc.) or in liquid form (liquid rubber, latex, etc.). Among the above rubber components, those containing polynorbornene as the main component are preferable, and in that case, the proportion of polynorbornene is 50≦(1
(weight ag, hereinafter the same) or more, where <65% or more is preferable.

(2) Facts about the ingredients include white 7 atatis, black 7 atatis, and black 7 atatis, which are obtained by vulcanizing various vegetable oils such as linseed oil, rapeseed oil, soybean oil, sesame oil, tung oil, and castor oil with sulfur or sulfur chloride. Various factis such as , amber-colored 7 actis, and blue 7-actis are used. These 7 actis may be used alone (or may be used as a mixture).In particular, factis obtained by vulcanizing rapeseed oil is preferred.

(0) Component softeners include oils, softeners, and other softening agents.Oils include aromatic oils, naphthenic oils, paraffin oils, vegetable oils, animal oils, and other rubbers. Any commonly used oil (softening oil, process oil, etc.) can be used. Examples of the vegetable oil and animal oil include mustard oil and rapeseed oil. Examples include oil, whale oil, and fish oil.

As plasticizers, any of those commonly used as softening agents for rubbers, which have a large softening effect, may be used, such as dibutyl hetatalate, diotatylphthalate, diotatylphthalate, diotatylphate, and the like. Other softeners include liquid rubber. The softeners may be used alone or in combination of two or more. Ordinary oil alone or a combination of oil and plasticizer is preferred.

Furthermore, in addition to components (A) to (0), the rubber composition contains commonly used rubber compounding agents such as fillers such as carbon black and zinc oxide, colorants, lubricants such as stearin, and anti-aging agents. They may be blended as appropriate within a range that does not impair the above-mentioned physical properties.

Any conventional vulcanization system may be used to vulcanize the rubber composition, and sulfur vulcanization or sulfur-free vulcanization may be used. The vulcanization conditions are not limited to &<, and normal conditions can be used.

The typical composition ratio of the rubber composition is shown below by taking the case of sulfur vulcanization as an example.O (Component) (Part) Rubber component
100 factis 1
00-2000 Softener 200-2
00G filler 1-io.

Anti-aging agent 0.5-6 sulfur
0.5 to 1° Vulcanization accelerator 1 to 20 The insulator of the present invention uses the above-mentioned specific rubber material as a constituent material, and its shape is specified. The main body has a substantially plate-like shape, and at least one side thereof is provided with a large number of protrusions that can substantially make line contact or point contact with other members, and seven rungs are provided on the outer periphery of the main body.

With such a shape, the contact area with other members is significantly reduced by the protrusions that can make line contact or point contact,
In addition, an air layer is airtightly confined between the protrusion and the seven rungs provided on the outer periphery, and the synergistic effect of these extremely small contact areas and the airtightly trapped air layer provides excellent vibration isolation properties. Moreover, by providing the 7 rungs, even if an excessive charge is applied, the entire insulator, and especially the protrusions, do not deform and can make line or point contact with other members. Yes ◎−.

Next, the shape of the insulator of the present invention will be explained with reference to the drawings. 1, 2, and 3 are a plan view, an enlarged vertical cross-sectional view, and a bottom view showing an example of the shape of the insulator of the present invention, respectively, and FIG. 4 is a partially enlarged perspective view of the outer periphery thereof. FIG. 5 is a longitudinal cross-sectional view showing a state where the insulator is interposed between the supporting body such as a cord player and a mounting surface without an insulator.

In Nos. 1 to 5wi, (1) is a plate-shaped main body with a circular planar shape made of the above-mentioned specific rubber material, and the contact surface of the main body with the supported body (2) is packed and mounted. A large number of protrusions (
4), and seven rungs (6) are provided on both contact surfaces of the outer peripheral portion of the main body D).

The shape of the protrusion (4) is not particularly limited as long as it can make substantial line contact or point contact with other members, and various shapes can be adopted. I'll give you something that has a moist shape.
Ru. Examples of the shape of this aspect include hot roots, power! ll
It may have any shape, with the top having a knife-like shape being particularly preferred. Another preferable protrusion (4) is one in which at least its top portion is pointed so that it can make point contact with other members. The shapes of this aspect include, for example, pyramidal shapes (including triangular pyramids and polygonal pyramids larger than quadrangular pyramids, the same shall apply hereinafter), conical shapes (including elliptical cones, the same shall apply hereinafter), dome shapes (near spheres, hemispherical shapes, etc.). Examples include cylinders with rounded tops (hereinafter the same applies), and those with needle-like points at the top are particularly preferred. In addition, in the protrusions of the above two types of embodiments, it is sufficient that only the top portions thereof are sieve-like or pointed, and the shape of the base portions is not particularly limited. For example, the shape may be such that a roof-shaped, pyramid-shaped, pyramid-shaped, conical, or desk-shaped top is placed on a base such as a truncated pyramid or a truncated cone.

Furthermore, shapes other than the above embodiments may also be adopted as long as they can make substantial line or point contact with other members, such as truncated pyramids, etc.
Protrusions in the shape of a truncated cone, a prism, a cylinder, or a shape may also be used. Note that line contact or point contact may be made by providing rough notches at the tops of these protrusions.

The protrusions (4) may be arranged randomly on the contact surface with other members, or may be arranged regularly. As a regular array,
Examples include concentric circular shapes (including concentric elliptical shapes, concentric polygonal shapes, etc., the same applies hereinafter), spiral shapes, radial shapes, lattice shapes, linear shapes, etc.The individual protrusions are provided at appropriate intervals. They may also be provided closely together, or a combination thereof.When provided closely, the bases of adjacent protrusions may be placed close to each other.

It may be connected and integrated. In a preferred arrangement, the protrusions are closely arranged in a concentric shape, for example,
Such close rows of protrusions allow air to be trapped between the parts and other members, resulting in a better vibration damping effect.

The projection (4) in the embodiment shown in FIGS. 1 to 5' has a knife-like sieve portion and a sieve-like base that widens at the end. It is preferable for

In the following, when the projection (4) is simply referred to, it means the cribriform projection.

In the embodiment of FIGS. 1 to 5, the cribriform processes (4) are arranged concentrically in close proximity to each other, and the concentric rows of processes (
5) Consists of ((5m) and (6b)).

When sieve-like protrusions (molds) are arranged concentrically, '1st
As shown in FIG. 3, it is preferable that the sieve portion (4a) is provided along the radial direction of the main body (1). At that time, in the rows (5a) and (5b) of adjacent protrusions, the first
One row of protrusions (5a) as shown in Figure #N3
Some or all of the protrusions (4) that can be invited to the other protrusions (
The protrusion (4) in Fig. 51) and the main body (1) may overlap in the radial direction, but (4) in Fig. 6 CIIH
-(4) As shown in the enlarged cross-sectional view of the line portion ((expanded on a plane)), the protrusions in one row of protrusions (5&) are
The sieve part (4 &) of (1) is the valley part (
4b) may also be provided.

The protrusion (4) may be provided superimposed on the main body (1) as shown in the enlarged longitudinal sectional view in Fig. 7 and the partially enlarged perspective view in Fig. 8, or as shown in Fig. 2 and Fig. 4. Similarly, a concentric convex band (9) may be provided on top of the main body (1). The latter embodiment corresponds to one in which the bases of the protrusions that are provided in close proximity to each other are integrated.

The height of the protrusion (4) is from the lowest part of the trough (4) to the phloem (4).
&) refers to the height of 0.1 to 5 zenzen, nakandzu
0.3-21 IIm is good and refreshing. Phloem part (4) of protrusion 1 (4)
The flat surfaces of a) and the 7th rank part (6) are usually made to be the same horizontal plane, but 1. Not necessarily limited to this
The number of protrusions (4) and the number of protrusion rows (6) are not particularly limited. For example, the number of protrusion rows (6) may be one in the case of a small insulator, and may be one in the case of a large insulator. may be two or three or more. In the embodiments 1 to 5wJ, the row of protrusions (5) [row of protrusions (5k)) at the outermost periphery is provided in contact with the 7th rank part (6), but as shown in Figs. Rank part (6)
It may be provided separately from the The rows (5) of protrusions may be provided with appropriate spacing as shown in FIGS. 1 to 3, or may be provided with no spacing. 1 In the insulator of the present invention, the protrusion (4) and the seventh rank portion (6) are connected to the supported body (
Although it is preferable to provide the l! No electricity. For example, as shown in the longitudinal cross-sectional view of FIG.
), and only the protrusion (4) may be provided on the contact surface with the supported body (2). Furthermore, in FIG. 9, the supported body (2
) may be provided with only the 7-rank portion (6), or the entire surface may be flat.

In the insulator of the present invention, a hole may be made in the center as shown in FIG.

Furthermore, a plurality of holes may be provided between the row of protrusions (5) and the row of protrusions (6) with or without providing the hole (γ) for the middle voice.

The planar shape of the main body (1) is usually circular, but it is not necessarily limited to this, and various shapes such as an ellipse and a polygon can be adopted.

The insulator of the present invention may be simply interposed between the supported body (2) and the mounting surface (s) as shown in FIG.
) and nuts (9), etc., are attached to the supported body (2) by means.
) may be fixed. Bolt (8) and nut (9)
All normal insulators are used, but in particular, those made of metal such as brass or iron whose surface is coated with a greasy coating such as vinyl chloride are preferred because of their adhesion to the rubber material that makes up the insulator. It is preferably used from the viewpoint that it has good properties and is difficult to transmit vibrations.

In order to produce the insulator of the first invention, it is sufficient to vulcanize and mold Maemisaki's specific rubber composition into a specific shape as described above, but the +/molding method can produce a molded product of ordinary rubber. You can do the same thing in that case. For example, the rubber composition may be directly press-vulcanized in a metal lid having a cavity of an appropriate shape, or an unvulcanized molded product may be made by calender molding or extrusion molding, and then this molded product may be Press vulcanization may be used, and injection molding is also possible. It is preferable that the protrusions (4) be formed all at once using a mold, but they may also be formed by cutting after vulcanization.

The insulator of the present invention is suitably used as an insulator for various types of equipment due to its excellent vibration-proofing effect. It is preferably used in stereos, tape recorders, and various electrical measuring instruments such as chemical balances. For example, when used in insulators for record players, sound quality deterioration caused by howling and external vibrations is sufficiently prevented and faithful reproduction of the original sound is possible, and when used in insulators for chemical balances, external vibrations Weighing errors caused by this can be eliminated.

Next, the insulator of the present invention will be explained by referring to reference examples and examples.

Reference Examples 1 to 4 Vulcanized rubber sheets were produced using rubber compositions having the formulations shown in Table 1.

First, the rubber component is tightened at around 60°a, other compounding ingredients are added to it, and it is kneaded in a Banbury mixer and then kneaded in a roll.
After sheeting, an unvulcanized sheeting with a thickness of about 10 ffiffl was obtained. This sheet was cut to an appropriate size, and pressed with a press at a pressure of 150 kg/em2 and a temperature of 155°O.
Vulcanization was performed for 0 minutes to obtain a vulcanized sheet.

Appropriate test pieces were cut out from the obtained vulcanized sheet and various properties were measured. The results are shown in Table 2. The rebound modulus, tensile strength and elongation are JI8 K 650.
1-1969 GC compliant url.

*Sold by Nippon Zeon, 100 parts of polynorbornenese (Nosolex, average molecular weight over 2 million) extended with 150 parts of naphthenic oil (Nosolex: !1l)
il mark) 2: Polynorbornene sold by Nippon Zeon ■ (average molecular weight 2 million or more) 52 Made by Nippon Zeon ■, styrene-butadiene rubber 100
Extended with 67.5 parts of highly aromatic oil 4: Amber-colored sulfur factis manufactured by German Che'onil 7 Applique Dr. Grundel 5: H-hon-hung oil ■ 7 Ten-based oil 6: ゛Aromatic oil 7: 2,2-methylene-bis(4,-
Methyl-4-t@rt-butylphenol) 8: Diphenyluane-based anti-aging agent manufactured by Bayer 9: Seiko Chemical - Gourd! Italo Crystalline Wax 10; Sanshin Kagaku Gourd Vulcanization Accelerator No. 2 Table/Example 1 Example 1 Using the rubber composition of Reference Example 1', press vulcanization was performed under the same vulcanization conditions as Reference Examples 1 to 4. The outline of figures 1 to 5 is as follows.

Diameter of main body (1): 60 am Maximum thickness of main body (1) (indicated by (Hl) in Fig. 2): 5 mm (5 mm) Height of projection (4) (indicated by (H2) in Fig. 2) 2 065mm The height of the convex band (5') is shown as (I3) in Figure 2): 0.5m The height of the 7 rung part (6) is shown as (H4) in Figure 2 C): The insulator that was seen in the first place is used as a speaker (weight 55kp)
When used as an insulator, no distortion was observed, and when a record listening test was performed, excellent playback sound quality was obtained.

Example 2 Using the rubber composition of Reference Example 2, press vulcanization was performed under the same vulcanization conditions as Reference Examples 1 to 4 to produce an insulator shown in No. 9m.

I attached the insulator I had learned to a commercially available record player and did a listening test of the record. For mounting, a body made of brass and completely coated with a polyvinyl chloride film was used for (8). As a result, high-fidelity reproduction was achieved with sufficient prevention of deterioration in reproduced sound quality 1 due to howling and external vibrations.

Examples 5 to 4 Example 1 using the rubber compositions of Reference Examples 6 to 4, respectively.
I made an incinerator in the same way. Each of the obtained insulators gave excellent results as in Example 1.

[Brief explanation of the drawing]

1Wi, 2, 6, and 4 are a plan view, an enlarged vertical sectional view, a bottom view, and a partially enlarged perspective view showing an embodiment of the insulator of the present invention, and FIG. 5 shows the state in which the insulator is installed. Fig. 1 and Fig. 6 are longitudinal sections showing one method of arranging protrusions.
FIG. 7 is a vertical cross-sectional view showing an example of a shape in which a hole is provided in the main body, FIG. It is a longitudinal cross-sectional view showing an example of a shape in which only protrusions are provided on the surface. (Main symbols in the drawing) (1) One body (2): Supported object (8): Placement surface (4): Protrusion (6): Row of protrusions (6) = 7 flange part 4α Off view 8 years old

Claims (1)

[Claims] 1 A vulcanized product of rubber, which has a hardness of A[-50' or less with a 1-5 degree needle, and 15 degrees or more with a type 1 rubber hardness needle, and has a rebound modulus of 50 or more. Made of rubber material
At least one side of the plate-shaped main body is provided with a large number of protrusions that can substantially make line contact or point contact with other members, and there are no seven tension parts provided on the outer periphery of the main body. An insulator characterized by: - 2 protrusions, - phloem-like protrusions with a knife-shaped phloem part and a skirt part that widens at the end; the phloem-like protrusions are closely arranged in a concentric a-shape; the phloem parts of the protrusions extend along the radial direction of the main body; The insulator according to claim 1.