JPH0384240A - Manufacture of liquid sealed damper - Google Patents

Abstract

PURPOSE:To prevent the overflow of a viscous fluid and perform the bonding of a lid body perfectly by bonding the lid body to a cylindrical container body with its closed bottom, placing the bottom part upward and injecting the viscous fluid from the inlet of the bottom part. CONSTITUTION:A thermoplastic resin made container body 32 is molded, and a rubber lid body 34 is vulcanization-molded to be bonded to the container body 32. The bottom part 30 of the container body 32 is placed upward, and the tip of an injector 47 is inserted from a small hole 36 so as to inject the fixed quantity of a viscous fluid 46. The peripheral part of the small hole 36 is then heated and deposited to fill up the small hole 36. A fluid sealed damper can be thus manufactured in a short time, and the viscous fluid is prevented from overflowing as well as the bonding of the lid body is prevented from being impeded by the viscous fluid adhered to a mating face 33.

Description

Detailed Description of the Invention (& Field of Industrial Application) This invention is a damper in which a highly viscous liquid is sealed in a space formed by a cylindrical container body with a bottom and a rubber lid. Relating to a manufacturing method.

(Prior Art) For example, in a CD player installed in a vehicle, etc., if the vibrations of the vehicle body are directly transmitted to the CD player, skipping may occur, so in order to prevent this, the CD player is Anti-vibration support for players is being implemented.

As such a liquid-filled damper, the one shown in FIG. 5 is conventionally known. To specifically explain the damper shown in FIG. 0, 100 is a cylindrical container body with a thick rubber bottom, is a lid made of rubber, and this lid 102 has a thick outer peripheral edge 104, a central stirring shaft 108 having a fitting hole 106, and a thin flexible portion 110 around the stirring shaft 108.
It has The lid 102 is attached to the container body 100 at the thick outer peripheral edge 104! A highly viscous liquid 103 such as silicone oil is sealed in a space formed by the container body 100 and lid 102 that are bonded together.

This damper fits into the shaft portion 114 of the supported member 112 in the fitting hole 106 of the wheel shaft 108, and also has an annular shape on the outer peripheral edge portion 104. At 1118, these support members 116 are fitted into the peripheral edges of the mounting holes of the support members 116.
and the supported member 112, and the stirring shaft 10
8 prevents vibrations from being transmitted from the support member 116 to the supported member 112 based on viscous flow resistance when stirring the high viscosity liquid 103.

(Problem to be Solved by the Invention) In this damper, since the flexible portion 110 has a shape that bulges outward, when the supporting member 116 and the supported member 112 undergo a large relative displacement, There is a problem that the flexible portion 110 hits the supported member 112. Therefore, Ganto Motoyama applied for the previous utility model registration (Jetkun Hei 1-
No. 23407) proposed a liquid-filled damper to avoid such problems. FIG. 6 shows an example of this. As shown in FIG. 0, this damper is bent in a figure 7 shape so that the flexible portion 110 enters inside the container body. In this way, the support member 116
Even when there is a large relative displacement between the flexible part 110 and the supported member 112, there is no fear that the flexible part 110 will hit the supported member 112, thereby preventing damage to the flexible part 110, or It is no longer necessary to provide a stopper to prevent interference with the structure, and the shape is simplified.

However, when the shape of the flexible portion 11O was made into such a shape, the following new problems occurred when manufacturing such a damper.

As shown in FIG. 7, the method for manufacturing this damper is to fill a container body 100 with an eave with a certain amount of high viscosity liquid 103 measured in advance with a measuring device, and then stir the lid 102. The shaft 108 and the flexible part 110 are connected to the container body l.
OO, and align the thick outer peripheral edge 104 with the opening side end surface of the container body 100 (at this time, the high viscosity liquid 103 inside is inside the space formed by the lid 102 and the container body 100). In this state, the mating surfaces of the container body 100 and the lid body 102 are vulcanized and bonded (in order to increase the adhesive strength, vulcanization bonding is used instead of normal bonding). In this way, after the high viscosity liquid 103 is injected into the container body lOO, the lid body 102
When combining the flexible part 1, the internal high viscosity liquid 103 mainly
Due to the exclusion action of 10, the high viscosity liquid 103 may overflow from the opening end surface of the container body 100, or the high viscosity liquid 103 may
This causes problems such as adhesion to the mating surfaces of the 0 and the lid body 102 and inhibiting their adhesion.

In addition, in the case of the above method, the container body lOO and the lid body 1
It takes a very long time to vulcanize and bond with 02, which does not improve production efficiency.

Another problem was that the product price became high.

(Means for Solving Problem t1) The damper manufacturing method of the present invention was created to solve such problems, and the gist thereof is to provide a cylindrical container body with a bottom, and a container body. A lid body that is a rubber member that closes the opening of the container, and has a stirring shaft in the center and a thin flexible part that curves around the stirring shaft so as to enter the inside of the container body. and a highly viscous liquid sealed in a space formed by the container body and the lid, and the fitting hole of the stirring shaft in the lid is fitted into the shaft of the supporting member or the supported member. A method for manufacturing a liquid-filled damper that is interposed between a supporting member and a supported member in a state in which the container body is molded from a thermoplastic resin material, and then the rubber lid body is vulcanized and molded. At the same time, or at the same time, the branch chain container body-lid bonded product is bonded to the branch chain container body, and the bottom of the branch chain container body-lid bonded product is turned upward, and a high viscosity liquid is injected into the space of the bonded product through an injection port provided at the bottom. Thereafter, the injection port is sealed by welding means.

(Operation and Effects of the Invention) The above-mentioned problems occur when manufacturing a damper in which the flexible portion is bent so as to enter the container body side. This is done by gluing the rear lid together.

Therefore, in the present invention, the container body and the lid are first integrated,
After that, a highly viscous liquid was injected into the inside. For this purpose, a small hole was previously formed in the bottom of the container body, and a highly viscous liquid was injected into the inside through the small hole with the bottom facing upward, and then the small hole was closed. In order to achieve this, in the present invention, the container body is formed of a thermoplastic resin material, and the small holes are later sealed by a welding means such as thermal welding.

According to the present invention, there is no need to inject the high viscosity liquid into the container body in anticipation of the amount of high viscosity liquid to be removed by the flexible portion as in the above conventional method, and the space is almost filled with the high viscosity liquid. The high viscosity liquid can be injected until it reaches the desired level, and the high viscosity liquid will not overflow due to the expulsion action of the flexible part after the high viscosity liquid is injected. Since the liquid does not adhere to the container, there is no problem that such highly viscous liquid inhibits the adhesion between the container body and the liquid.

On the other hand, since the small hole is sealed not by adhesive but by welding using heat or the like, there is no problem of poor adhesion there.

In the present invention, the rubber lid can be vulcanized and simultaneously fixed to the container body. in this case,
The time required to vulcanize and bond the separately molded container body and lid can be omitted, and production efficiency can be greatly increased while product costs can be reduced.

(Example) Next, embodiments of the present invention will be described in detail based on the drawings.

FIG. 2 shows a CD player mounted in the front of the car and its support structure. In the figure, lO is a support frame, and a mechanical deck 12 is elastically supported by this support frame 10 via a spring 14. There is. Mecha deck 1
2 is provided with a turntable 18 that supports and rotates the compact disc 16, a drive unit 20 that rotationally drives the turntable, an optical pickup 24 having a reading unit 22, and a guide unit 26 that guides the movement of the optical pickup 24. It is being

A liquid-filled damper 28 is interposed between the mechanical deck 12 and the support frame 10.

FIG. 3 shows the specific structure of this liquid-filled damper 28. As shown in the figure, this damper 28 consists of a cylindrical container body 32 made of thermoplastic resin (polycarbonate, polyacid, etc.) with a bottom 30, and a rubber The cover body 34 is made of (butyl rubber, etc.). Bottom portion 30 of container body 32
A small hole 36 is formed in the manufacturing process, and this small hole 36 is sealed with the same resin.

The lid body 34 has a thick outer peripheral edge 3B and a stirring shaft 42 at the center.
and a thin flexible portion 44 around the stirring shaft. Here, the flexible portion 44 has a V-shaped cross section that extends inside the container body 32.

A fitting hole 40 is formed in the stirring shaft 42, and an annular groove 48 is formed in the thick outer peripheral edge 38, and the fitting hole 40 is fitted into the shaft portion extending from the mechanical deck 12 side. ,
Further, the annular groove 48 is fitted into the peripheral edge of the mounting hole of the support frame IO.

The lid 34 and the container body 32 are fixedly connected together at their mating surfaces 33, and a highly viscous liquid 46 such as silicone oil is sealed in the space formed by the lid 34 and the container body 32. .

Therefore, in this damper 28, the support frame lO
When the mechanical deck 12 is relatively displaced, the stirring shaft 42 stirs the highly viscous liquid 46, and the vibration is damped by the viscous flow resistance at that time.

Next, a method for manufacturing this damper 28 will be specifically explained based on FIG. 1. First, as shown in (A), a thermoplastic resin container body 32 is molded, and then, as shown in (B), a rubber lid 34 is vulcanized and molded, and at the same time or after that, the container body is molded. Glue to 32. bA (
As shown in C), insert the tip 47 of the syringe into the container body 32 through the small hole 36 with the bottom 30 facing upward;
A measured amount of high viscosity liquid 46 is injected. After the high viscosity liquid 46 has been injected, the surrounding area of the small hole 36 is heated and welded, thereby filling the small hole 36. As a means for filling the small hole 36, it is also possible to use a method of fitting a plug 50 into the small hole 36 and ultrasonically welding it, as shown in FIG. In either of these methods, the small hole 36 can be sealed in a very short time on the order of seconds.

According to the manufacturing method of this example, the injected high viscosity liquid 46 may overflow from the mating surface 33 of the container body 32 and the lid 34, or the high viscosity liquid adhering to the mating surface 33 may cause the container body 32 and the lid 34 to There is no problem that adhesion is inhibited.

Furthermore, in the method of this example, if the lid body 34 is vulcanized and bonded to the container body 32 at the same time as the lid body 34 is vulcanized, a process for bonding the lid body 34 and the container body 32, which have been separately molded, is not necessary. Therefore, there is an advantage that the manufacturing time can be significantly shortened.

Although the embodiments of the present invention have been described in detail above, the present invention can be practiced in other ways.

For example, the present invention can be applied to various other forms of liquid-filled dampers, and can be applied not only to dampers in which the stirring shaft is arranged horizontally, but also to dampers in which the stirring shaft is arranged vertically. It can also be applied to dampers. Furthermore, although the CD player has been described above as an example, the present invention can also be applied to dampers for vibration-proofing and supporting other devices. It can be implemented with various modifications based on the knowledge of those skilled in the art.

[Brief explanation of drawings]

FIG. 1 is a process explanatory diagram of a method for manufacturing a liquid-filled damper according to an embodiment of the present invention, FIG. 2 is a front view of a CD player supported with vibration isolation using the damper, and FIG.
The figure is a sectional view of the same damper. FIG. 4 is an explanatory view showing one step of another manufacturing method of the present invention, FIG. 5 is a sectional view of a conventionally known damper, FIG. 6 is a sectional view of a damper as an improved example of the damper, and FIG. FIG. 7 is a process explanatory diagram of the method for manufacturing the damper shown in FIG. 6. lO: Support frame 12: Mecha deck 30: Bottom
32: Container body 34: Lid body 36
: Small hole 42: Stirring shaft 44: Flexible part 46: High viscosity liquid Diagram 6 0 (A) j4 CB) Diagram (C) 8 (D) Diagram 4 Diagram procedure amendment

Claims (1)

[Scope of Claims] A cylindrical container body with a bottom, a rubber member that closes the opening of the container body, and has a stirring shaft in the center, and the inside of the container body is arranged around the stirring shaft. It includes a lid body having a thin flexible part that is curved so as to enter the container body and a high viscosity liquid sealed in a space formed by the container body and the lid body, and a stirring shaft in the lid body. A method for manufacturing a liquid-filled damper which is interposed between a support member or a supported member with a fitting hole of the support member or a supported member fitted in a shaft portion of the support member and the supported member, the container body being made of thermoplastic material. After molding with a resin material, the rubber lid is adhered to the container body at the same time as or after vulcanization molding, and then the bottom of the container body-lid bonded product is placed on the bottom with the bottom facing upward. A method for manufacturing a liquid-filled damper, comprising injecting a highly viscous liquid into the space of the adhesive product through an injection port, and then sealing the injection port with a welding means.