JPS6319615Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a washer seal that has sealing properties and can withstand repeated use.

A detailed description will be given below with reference to the drawings.

Conventionally, washer seals have been used for the purpose of preventing leakage of oil, water, etc. at fasteners such as bolts, but they have many drawbacks.

That is, to give an example, as shown in Fig. 4, a metal ring 7 and a synthetic rubber 8 are combined, the periphery of the inner diameter side of the metal ring 7 is covered with the synthetic rubber 8, the metal ring 7 forms the skeleton of the washer, and the covered rubber A sealing washer is provided which has a sealing part 8 which performs a sealing function.

However, in this seal washer, as the rubber is bonded to the metal ring 7 as shown in Fig. 5, the rubber seal part 8 tends to protrude inward when tightening, resulting in cracks and defects, especially when tightening to a high degree. The seal portion 8 is destroyed and loses its sealing function.

In addition, since the seal washer receives a compressive force in the rotational direction until the contact surface of the fastening member 9 and the fixing member 10 reaches the surface of the metal ring 7, the metal ring 7 and the seal portion 8 are easily disassembled when the fastening is completed. . Furthermore, with repeated use, the damage to the synthetic rubber 8 progresses significantly, resulting in a fatal drawback in that it loses its sealing function as a seal washer.

The present invention aims to eliminate these deficiencies. The washer seal of this invention is the second
As shown in the figure, a ring core material A is made of metal, hard synthetic resin, etc., and has protrusions 1 of appropriate widths that protrude alternately on both the front and back surfaces on the circumferential cross section in the middle of the circumferential surface.
is used as a base material, but the protruding stripes 1 may be continuous with each other or may be provided at regular intervals. As shown in FIG.
This is a washer seal made of an elastic body B such as synthetic rubber or soft synthetic resin that covers the outer circumference 2 and the inner circumference 3 of the elastic body B.
It is provided to be thicker than the surface thickness and includes the convex strips 1 continuously. The thickness of the peripheral surface between the outer peripheral part 2 and the inner peripheral part 3 is equal to the surface thickness of the convex strip 1, or is slightly thicker without exceeding the thickness of the inner and outer peripheral surfaces 2 and 3,
It has a structure in which a protruding ring 4 made of an elastic body thicker than the thickness of the inner and outer circumferential surfaces 2 and 3 is provided in the middle of both sides of the intervening circumferential surface.

As shown in FIG. 3, when this washer seal is tightened, the contact surfaces of the fastening member 6 and the fixing member 5 first come into contact with the elastic protrusion rings 4 on both sides of the washer seal, and the protrusion rings are tightened. 4 deforms to relieve the clamping pressure, but the upper and lower sealing surfaces of the outer circumferential part 2 and inner circumferential part 3 absorb the compression before the protruding ring 4 is deformed to the maximum extent, so that the mutually optimal clamping pressure is maintained. Demonstrates excellent sealing properties. In addition, the washer seal is the fifth
Of course, it can also be used in places with shapes like the fastening member 9 and fixing member 10 as shown in the figure, and exhibits good sealing performance.

In addition, if this tightening pressure is excessive, the protruding ring 4 is tightened strongly while rotating, but the convex ridges 1 protruding on the front and back sides of the ring core material A and the recesses on the back side of the ridges 1 are filled. Since the ring core material A and the protruding ring 4 are firmly fixed together by the elastic body B, the ring core material A and the protruding ring 4 are securely held together without disassembling, and the clamping pressure that cannot be relieved is released between the outer peripheral part 2 and the inner peripheral part 3. Yield to the seal surface. This clamping pressure compresses both surfaces of the outer periphery 2 and both surfaces of the inner periphery 3, but since all the pressure is received by the surface of the ridge 1 protruding from the front and back of the ring core material A, the outer periphery 2 and the inner periphery No unreasonable pressure is applied to 3, and elastic body B is used as before.
It has the advantage of not causing damage or weakening the sealing performance, and can withstand repeated use.

In addition, since the washer seal of the present invention covers the ring core material A with the elastic body B, there is no metal touch that directly contacts the fastening member 6, the fixing member 5, etc.
Therefore, not only is there no sealing failure, but there is also no metal contact sound, which is highly effective in preventing noise.

In addition, since it can be attached to the fixing member 5 whose fastening part is concave as shown in Fig. 3,
The upper and lower surfaces of the washer seal have the same shape,
If the outer periphery 2 side surface is shaped so that the middle part protrudes outward and the inner periphery 3 side surface is shaped so that the middle part protrudes inward, the washer seal and the fastening member 6 can be easily fitted into the recess of the fixing member 5 without making a mistake on the sealing surface. The fixing member 5 and the fastening member 6 can be inserted into any shape, and the fixing member 5 and the fastening member 6 can be tightened while maintaining an accurate distance. It has many advantages, such as being able to minimize the amount of heat and creating a sealing effect on the sides.

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

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a washer seal according to the present invention. FIG. 2 is a partially cutaway perspective view of the ring core material used in the washer seal of the present invention. FIG. 3 is a sectional view of the washer seal of FIG. 1 in use. FIG. 4 is a sectional view of a conventional seal washer. FIG. 5 is a sectional view of the seal washer shown in FIG. 4 in use. A... Ring core material, B... Elastic body, 1... Convex strip,
2...Outer circumference, 3...Inner circumference, 4...Protrusion ring, 5
...fixing member, 6...fastening member, 7...metal ring,
8...Synthetic rubber seal part.

Claims (1)

[Scope of utility model registration request] In a washer seal consisting of a ring core material made of metal or hard synthetic resin, etc., and an elastic body such as synthetic rubber or soft synthetic resin covering the ring core material; Equipped with protrusions of an appropriate width that protrude alternately on both the front and back sides on the circumferential cross-section,
The thickness of the outer circumferential part and the inner circumferential part of the elastic body provided to cover the ring core material is set to be thicker than the height of the protruding part, and the protruding part and the back part of the protruding part are continuously covered with the inner part. The thickness of the circumferential surface between the outer circumferential part and the inner circumferential part containing the convex strip is equal to the surface thickness of the convex strip, or is slightly thicker but does not exceed the thickness of the inner and outer circumferential surfaces, and the thickness of the circumferential surface between the outer circumferential part and the inner circumferential part is equal to or slightly thicker than the thickness of the inner and outer circumferential surfaces. This washer seal features a structure in which a protruding ring made of an elastic material is attached so that it is thicker than the inner and outer peripheral surfaces.