JP4683193B2 - Anti-vibration device manufacturing method - Google Patents

Description

  The present invention relates to a method of manufacturing a vibration isolator that is particularly suitable for mass-producing small-sized general-purpose vibration isolators such as compressor foot rubber.

Conventionally, various anti-vibration devices have been used in a wide range of fields, and the shape and configuration of the anti-vibration devices vary depending on the application, use site, use frequency, etc. Air-damped anti-vibration rubber “Hybrid Air Damper” that enables anti-vibration is released ”, Bridgestone website, Chemicals related news 2003 (Posted on March 26, 2003), [Search on October 13, 2004 ] <Internet: <URL: http: //www.bridgeestone.co.jp/news/d_030326.html>). FIG. 3 shows an example of an anti-vibration device 2 that has been conventionally used as an anti-vibration rubber for a small general-purpose machine, and corresponds to the above-described hybrid air damper type anti-vibration device except for a metal spring. 3A is a top view of the vibration isolator 2, and FIG. 3B is a Y-O-X cross-sectional view in FIG.
The vibration isolator 2 is composed of an elastic support member 21 and a plurality of (four) restraint plates 22 having an O-shape in plan view. The elastic support member 21 has a columnar shape in the vertical direction and is horizontally oriented on the outer peripheral side surface thereof. And a constraining plate 22 having an O-shape in a plan view is integrally fitted in the fitting groove 23.

  As a method of forming the vibration isolator 2 as described above, for example, a restraint plate 22 coated with an adhesive is placed in a predetermined position in a mold in advance, and then a raw material before vulcanization for forming the elastic support member 21 is made of gold. A method of injecting into a mold and vulcanizing is mentioned. Here, in order to sufficiently exert the function of restraining the elastic deformation of the elastic support member 21 on the restraint plate 22, it is important that the elastic support member 21 and the restraint plate 22 are brought into close contact as much as possible. The anti-vibration device 2 in which the elastic support member 21 and the restraint plate 22 are well integrated can be manufactured by heating and vulcanizing while bringing the raw material before vulcanization into contact with the restraint plate 22 to which the material is applied. Although the restraint plate 22 is usually made of metal, the surface of the restraint plate 22 is roughened in advance (blasting or chemical treatment) from the viewpoint of realizing sufficient bonding strength between the elastic support member 21 and the restraint plate 22. Etching treatment) or degreasing treatment may be performed.

  Here, the adhesive is heated (baked) to a certain temperature or more after the restraint plate 22 coated with the adhesive is placed in the mold and before the raw material before vulcanization forming the elastic support member 21 is injected. ) And the adhesive may be thermally deteriorated and the required adhesive strength may not be realized. In order to prevent such adhesive baking, after the restraint plate 22 to which the adhesive is applied is placed in the mold, the raw material before vulcanization that forms the elastic support member 21 is injected without taking a long time. In addition, it is necessary to cool the mold temperature to some extent (cool to a temperature at which the adhesive does not thermally deteriorate) before the constraining plate 22 coated with the adhesive is placed in the mold.

  However, in the former method of injecting the raw material before vulcanization without taking as much time as possible after installing the constraining plate 22 coated with an adhesive in the mold, the constraining plate 22 coated with an adhesive in the mold. Regardless of whether the machine is installed manually or manually, a certain amount of time is required until the mold is sealed and the raw material before vulcanization is injected after installation. is there. In the former method, the adhesive force inherent to the adhesive cannot be sufficiently exhibited, and the function of the restraint plate 22 may not be sufficiently extracted.

  On the other hand, in the latter method in which the mold temperature is sufficiently cooled before the constraining plate 22 to which the adhesive is applied is placed in the mold, the deterioration of the adhesive can be prevented, and the function of the constraining plate 22 can be reduced. Although effective in that it can be pulled out sufficiently, when the vibration isolator 2 is to be continuously manufactured, a mold temperature cooling step and a reheating step for vulcanization are required during the process. There is room for improvement in terms of production efficiency. In particular, in the case of manufacturing a vibration isolator for a small general-purpose machine that requires a reduction in manufacturing cost, there has been a strong demand for improvement of such problems relating to production efficiency.

“Released air-damped anti-vibration rubber“ hybrid air damper ”that enables anti-vibration in low frequency range”, Bridgestone website, Chemicals-related news 2003 (posted March 26, 2003), [2004 Search October 13], Internet <URL: http: // www. bridgestone. co. jp / news / d_030326. html>

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method of manufacturing a vibration isolator that is particularly suitable for mass production of a vibration isolator for a small general-purpose machine.

In order to achieve the above object, a method of manufacturing a vibration isolator according to the present invention is a method of manufacturing a vibration isolator comprising an elastic support member and a restraint plate that restrains elastic deformation of the support member, A) Forming a cylindrical shape having a hollow portion penetrating in the vertical direction, and forming an elastic support member having a plurality of fitting grooves formed continuously or intermittently in the horizontal direction on the outer peripheral side surface thereof. And (B) forming a plurality of constraining plates having a C-shaped shape in plan view and the whole of which is a fitting portion that can be fitted into the fitting groove. And the step of arranging and mounting each restraint plate by shifting by an angle obtained by dividing 360 ° by the number of restraint plates used at that time.
That is, if the manufacturing method of the present invention is adopted, the elastic support member is continuously produced continuously without lowering the mold temperature from the vulcanization temperature by the step (A). Since the restraint plate can be integrated with the elastic support member in a separate process, the process of cooling the mold and the process of re-heating the mold can be eliminated, and the production efficiency is higher than that of the conventional manufacturing method. And the manufacturing method of the vibration isolator excellent in manufacturing cost can be implement | achieved.
In the present invention, the restraint plate is fitted in the fitting groove and integrated with the elastic support member so as not to be easily detached from the fitting groove. Thus, the restraint plate and the elastic support member can sufficiently adhere to each other, and therefore, the function of the restraint plate can be sufficiently extracted without using an adhesive. In other words, if the manufacturing method of the present invention is adopted, it is possible to reduce the procurement cost of the adhesive and the cost or time required for the adhesive application process to the restraint plate, and realize a manufacturing method with higher production efficiency and manufacturing cost. Can do.

  The shape of the elastic support member in the present invention is not particularly limited as long as it has a column shape extending in the vertical direction, and any of a columnar shape, a prismatic shape, a conical shape, and a pyramid shape can be adopted. Further, the fitting groove that extends around the outer peripheral side surface of the elastic support member in the horizontal direction may be a fitting groove that continuously circulates around the outer periphery, or a fitting that circulates intermittently. It may be a groove.

The shape of the restraint plate has a fitting portion that can be fitted in a fitting groove formed on the outer peripheral side surface of the elastic support member, and functions as a restraint plate (restrains elastic deformation of the elastic support member). There is no particular limitation as long as the shape can exhibit the function).
More specifically, examples of the shape of the restraint plate include a C-shaped shape, a U-shaped shape, and an L-shaped shape as a planar view shape. A constraining plate having a linear shape may be appropriately deformed to have an arbitrary shape, and the elastic support member may be fitted. In addition, it is possible to employ a C-shaped constraining plate in plan view when the horizontal cross-sectional shape of the elastic support member at the fitting groove position is circular, elliptical, or polygonal.

  Moreover, as a fitting part which the said restraint plate has, it may have a fitting part as a part of restraint board, and the whole may be a fitting part. When the constraining plate has a C-shaped shape in plan view, only a part of the inside of the constraining plate may be fitted into the fitting groove, but from the viewpoint of securing stable spring characteristics, the constraining plate It is preferable to fit the whole in the fitting groove (the whole as a fitting portion).

  Here, even if the elastic support member has a horizontal cross-sectional shape of any shape at the fitting groove position of the elastic support member, the planar view shape of the restraint plate is set so as to coincide with the shape. This is preferable from the viewpoint of ensuring a contact area between the restraint plate and the elastic support member and exhibiting the function of the restraint plate better and more stably without using an adhesive. For the same reason, it is preferable that the thickness of the fitting portion in the restraint plate is set so that the entire thickness matches the fitting groove width of the elastic support member and is in close contact with the side surface of the fitting groove.

  The elastic support member preferably has a tubular shape having a hollow portion penetrating in the vertical direction. By having such a hollow portion, the elastic support member can be easily deformed when the constraining plate having a C-shape in plan view is fitted to the elastic support member, and the constraining plate and the elastic support member can be more easily formed. Can be integrated.

  In addition, the ratio of the width of the fitting portion of the restraint plate to the thickness of the side wall of the cylindrical shape on the basis of the depth direction of the fitting groove is usually 5 to 95%, preferably 50 to 80%. . If the ratio deviates from the above range, the elastic support member may be broken during use (inferior in durability of the vibration isolator) or the function of the restraint plate may not be sufficiently exhibited.

  It is preferable that the number of fitting grooves formed around the outer peripheral side surface of the elastic support member is plural, and the step (B) fits the plurality of restraining plates into the fitting grooves. It is preferable that it is a process to perform. In the present invention, as described above, it is preferable to employ a restraint plate having a C-shaped shape in plan view. However, from the viewpoint of homogenizing the vibration-proof performance of the vibration-proof device, the C-shaped shape is used. It is desirable to arrange the constraining plate so that the opening is not extremely unevenly distributed in the vibration isolator. More specifically, for example, if the number of fitting grooves is two, it is preferable to use two of the restraining plates and dispose them 180 degrees apart from each other, and the number of fitting grooves is three. If so, it is preferable to use three constraining plates and to dispose them 120 ° apart from each other.

  According to the manufacturing method of the present invention, the vibration isolator can be mass-produced with high efficiency and low cost. The manufacturing method of the present invention is particularly suitable as a manufacturing method of a vibration isolator for a small general-purpose machine such as a pump, a motor, a compressor, and an engine.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the present invention will be described in more detail with reference to the drawings. However, the present invention is not limited to the following examples.
FIG. 1 shows an example of a vibration isolator obtained by the manufacturing method of the present invention. FIG. 1A shows a C-shaped plan view on an elastic support member 11 obtained by the step (A) in the present invention. It is the schematic explaining a mode that the restraint board 12 which has a shape is fitted, ie, the (B) process in this invention. FIG.1 (b) is XX sectional drawing of the vibration isolator 1 obtained through the said (B) process.

In FIG. 1, the elastic support member 11 has a column shape extending in the vertical direction, and has two fitting grooves 13 having a fixed depth that continuously circulates in the horizontal direction on the outer peripheral side surface thereof. A constraining plate 12 having a C-shape in plan view is fitted in the groove 13.
Here, the whole restraint plate 12 is a fitting part. The elastic support member 11 has a cylindrical shape including a substantially cylindrical through-hole 14 that penetrates in the vertical direction.

In the present invention, the elastic support member means a member that substantially supports a load of a vibrating body such as a pump, a motor, a compressor, and an engine.
Here, the material of the elastic support member 11 is not particularly limited. For example, rubber, thermoplastic elastomer, soft vinyl chloride, cork, or the like can be used.

  Further, in the present invention, the restraint plate means a control plate used for restraining horizontal deformation of the elastic support member. The material of the restraint plate 12 is not particularly limited, and a restraint plate made of metal, resin, wood or the like can be used as appropriate.

Here, the number of the fitting grooves 13 formed in the elastic support member 11 is usually 1 to 10, preferably 1 to 5, and more preferably 2 to 3. The number of constraining plates 12 fitted in the fitting groove 13 may be smaller than the number of the fitting grooves 13, but is usually the same as the number of the fitting grooves 13.
Further, the width of the fitting groove 13 is usually 0.5 to 5.0 mm, preferably 1.0 to 2.0 mm. The thickness of the constraining plate 12 fitted in the fitting groove 13 may be set smaller than the width of the fitting groove 13, but is usually a thickness that matches the width of the fitting groove 13. By setting the fitting groove 13 and the constraining plate 12 in such a range, the constraining plate 12 can be arranged in a well-balanced manner in the vibration isolator 1, and the vibration isolating characteristics can be expressed more uniformly and satisfactorily. Become.

  The specific arrangement method of the restraint plate 12 is not particularly limited as long as the vibration damping characteristics of the vibration isolator can be expressed uniformly. For example, 360 ° is divided by the number of the restraint plates 12 to be used. Each constraining plate 12 can be arranged by shifting the angle. For example, when two restraint plates are used, they may be shifted by 180 degrees from each other, when three restraint plates are used, they may be shifted by 120 degrees, and when four restraint plates are used, they may be shifted by 90 degrees.

FIG. 2 is a plan view for further explaining an example of a restraint plate used in the manufacturing method of the present invention. In FIG. 2, the constraining plate 12 has a C-shaped shape in a plan view, and the C-shaped shape includes an arc (arc AB) having end points A and B on the inner peripheral side thereof. In this embodiment, the arc AB of the restraint plate 12 is formed so as to coincide with the outer periphery of the horizontal sectional shape at the position of the fitting groove 13 of the elastic support member 11. The arc portion having B is fitted in close contact with the bottom surface of the fitting groove 13.
Here, when the inner center of the arc is the inner center point O, the angle θ formed by the virtual line OA and the virtual line OB is usually 20 to 180 °, preferably 40 to 60 °. If the angle is too small, it may be difficult to integrate the restraint plate 12 with the elastic support member 11. On the other hand, if the angle is too large, the restraint plate 12 may be easily detached from the elastic support member 11.

  In the present invention, an adhesive may or may not be used when the restraint plate is fitted to the elastic support member. When using an adhesive, an epoxy adhesive, rubber adhesive, vulcanized adhesive, etc. can be used as appropriate, and the surface of the restraint plate is roughened before applying the adhesive. (Blasting treatment or chemical etching treatment) or degreasing treatment may be appropriately performed.

It is the schematic explaining an example of the vibration isolator obtained by the manufacturing method of this invention. It is a top view explaining an example of the restraint board used for the manufacturing method of this invention. It is the schematic explaining an example of the vibration isolator conventionally used.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vibration isolator 11 Elastic support member 12 Restraint plate 13 Fitting groove

Claims (4)

A method of manufacturing a vibration isolator comprising an elastic support member and a restraint plate that restrains elastic deformation of the support member, and the following steps (A) and (B):
(A) Forming a cylindrical shape having a hollow portion penetrating in the vertical direction, and forming an elastic support member having a plurality of fitting grooves formed continuously or intermittently in the horizontal direction on the outer peripheral side surface thereof The process of
(B) A plurality of constraining plates, each having a C-shaped shape in plan view, and the entirety of which is a fitting portion that can be fitted into the fitting groove, are formed, and the whole of the restricting plate is fitted into the fitting groove. And placing and mounting each restraint plate by shifting by an angle obtained by dividing 360 ° by the number of restraint plates used at that time,
The manufacturing method of the vibration isolator characterized by comprising.   2. The manufacturing method according to claim 1, wherein a ratio of a width of the fitting portion of the restraint plate to a side wall thickness of the tubular shape of the elastic support member is 5 to 95% with reference to a depth direction of the fitting groove. .   2. The elastic support member has two fitting grooves, and the step (B) is a step of fitting the two restraining plates into the fitting grooves by shifting each other by 180 ° in plan view. Or the manufacturing method of 2.   2. The elastic support member has three fitting grooves, and the step (B) is a step of fitting the three restraining plates into the fitting groove by shifting each other by 120 ° in plan view. Or the manufacturing method of 2.

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