JPH0130650Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a seal washer that has excellent noise prevention and sealing properties.

Conventionally, various seal washers have been known for the purpose of preventing leakage of fixed parts of bolts and the like at locations where bolts and the like are assembled. Generally, as shown in Fig. 1, a reinforcing ring 1 having an inverted L-shape in cross section is used, and the inverted L-shaped reinforcing ring 1 is placed at the bottom of the reinforcing ring 1.
Sealing was attempted by providing a donut-shaped elastic body 2 that can be held by
The elastic body 2 causes a lateral flow from below the umbrella part 3 provided at the outer peripheral end of the holder, and not only does it not have sufficient adhesion force, but if the elastic body 2 that has been deformed by the lateral flow is used for a long period of time, torque down due to fatigue of the elastic body will occur. It had many drawbacks, such as weakening its elasticity and extremely poor sealing performance, making it completely unacceptable for reuse.

In order to eliminate such drawbacks, a method has been implemented in which the umbrella part 3 provided at the outer peripheral end of the inverted L-shaped reinforcing ring 1 is suspended to a range where the lower elastic body 2 does not flow sideways, but this method prevents sideflow. Conversely, in this method, the amount of deformation of the elastic body 2 is too small, and even if the elastic body 2 is tightened with high torque, the elastic body 2 will not achieve sufficient adhesion and the sealing performance will not be improved, and it will not have any anti-vibration effect. It ends up. That is, the dimensions of the hanging umbrella part 3 of the inverted L-shaped reinforcing ring 1 and the dimension from the center to the umbrella part 3 affect the torque and deformation amount of the lower elastic body 2, and greatly affect the sealing performance. The shape is naturally limited. In addition, the elastic body 2 needs to have a sufficient volume in order to take measures against vibration and sound that are required these days, which tends to further increase the above-mentioned drawback of cross-flow.

The present invention eliminates these drawbacks and provides an ideal sealing washer that has excellent sealing performance, is easy to install, has no metal contacts, and has a large noise prevention effect.

To explain the present invention based on the drawings, Fig. 2,
And as shown in Figure 3, the head has a flat cross section,
Or, it is equipped with a metal reinforcing ring A having an umbrella part 3 at the outer peripheral end, the inner peripheral end, or both the inner and outer peripheral ends, and a sealing part 4 formed of an elastic body such as synthetic rubber or synthetic resin below the reinforcing ring A. The seal portion 4 has a convex seal ring 4a extending downward, and has a bolt insertion hole 5 at the center of the inner side, and has a flat shape on the body of the seal portion 4. It has a structure in which a washer B having a downward umbrella portion 6 at the inner circumferential end is inserted and integrated. In this structure, as shown in Fig. 2, a metal reinforcing ring A with an umbrella part 3 at the outer peripheral end is connected to a seal part 4 on the upper part of the washer B.
It is preferable that the inside diameter of the umbrella part 6 of the washer B inserted into the body of the seal part 4 is larger than the bolt insertion hole 5 of the seal part 4, so that the seal It is preferable to insert it at a position that does not reach the lower end of the protruding seal ring 4a and does not come into contact with the reinforcing ring A, since metal touch can be prevented.

The seal washer of the present invention has a nut 7 attached to a support member 8 and screwed onto a bolt as shown in FIG.
etc., and the upper and lower parts of the seal part 4 come into pressure contact with the nut 7 and the support member 8, and exhibit a sealing effect. An attempt is made to cause excessive lateral flow outward from the umbrella portion 3. However, a rigid washer B inserted into the body of the seal part 4 disperses the amount of lateral flow of the elastic body, and since the washer B is integrated with the seal part 4, it comes into contact with the washer B of the seal part 4. Since the surface is completely deprived of mobility due to lateral flow and the periphery of the surface is also restrained, the amount of lateral flow is largely regulated to maintain sufficient elasticity and prevent excessive deformation. The effect of suppressing the amount of deformation of the seal portion 4 is to suppress the strain deformation and lateral flow failure of the elastic body, which is the material, and to greatly extend the life of the elastic body and to greatly improve the sealing performance, allowing repeated use. This has the great effect of making it possible to select a material with optimal elasticity for the seal.

In addition, in order to fix the support member 8, as shown in Fig. 1, the conventional seal washer does not have an effective fixing means in the radial direction other than the bolt that passes through the seal washer, so installation errors are likely to occur, resulting in incorrect installation. However, as shown in FIG. 3, the protruding seal ring 4a provided below the seal portion 4 and the downwardly directed umbrella portion 6 at the inner peripheral end of the washer B included therein
It fits into the mounting hole 9 of the support member 8 and guides it to the correct position where it can exert a large sealing force. Furthermore, since the umbrella part 6 of the washer B has a moderate rigidity, it suppresses excessive deformation of the elastic body located around it, and even if it receives excessive clamping pressure, the umbrella part 4a absorbs the pressure and prevents cracks and damage. Its effects are great.

In addition, the seal washer of the present invention has a sealing washer B having an umbrella part 6 on the inner peripheral edge inserted into the body of the sealing part 4, so that the sealing washer of the present invention is made of a material that maintains strong elasticity as described above. It suppresses vibration to a very small level due to its ease of use, dispersion of the amount of cross flow, and reduction of the amount of strain and deformation, and also greatly improves the soundproofing effect because it does not have any metal contact points.

As described above, the seal washer of the present invention has a simple structure, greatly improves sealing performance, and is an ideal seal washer that has good workability and generates little noise.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional seal washer. FIG. 2 is a sectional view of the seal washer of the present invention. FIG. 3 is a sectional view of the seal washer of the present invention in use. A...Metal reinforcing ring, B...Washer, 4...
... Seal part, 5 ... Bolt insertion hole, 6 ... Umbrella part,
8...Supporting member.

Claims (1)

[Scope of utility model registration request] In a seal washer, which is equipped with a metal reinforcing ring on the head and a sealing part made of an elastic material such as synthetic rubber or synthetic resin below the metal reinforcing ring; the sealing part is continuously downward. A washer is inserted into the body of the seal portion, which has a convex seal ring that protrudes from the seal ring, and has a bolt insertion hole at the center of the inside, and is flat in shape and has a downwardly directed umbrella portion at the flat inner circumferential end. Seal washers featuring an integrated structure.