JPS6319614Y2 - - Google Patents

Description

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

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.

In other words, to give an example, as shown in Figure 4,
A sealing part 9 in which a metal ring 8 and a synthetic rubber 9 are combined, the inner periphery of the metal ring 8 is covered with the synthetic rubber 9, the metal ring 8 forms the skeleton of the washer, and the covered rubber part performs a sealing function. There was a seal washer with .

However, as shown in Fig. 5, in this seal washer, since the rubber is bonded to the metal ring 8, the rubber seal part 9 tends to protrude inward when tightening, causing cracks and damage, especially when tightening to a high degree. The seal portion 9 is destroyed and loses its sealing function.

Further, since the seal washer is rotated and compressed until the contact surface of the fastening member 10 and the fixing member 11 reaches the surface of the metal ring 8, the metal ring 8 and the seal portion 9 are easily disassembled when the fastening is completed. Moreover, with repeated use, the damage to the synthetic rubber 9 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.

As shown in Fig. 2, the washer seal of the present invention is made of metal or hard synthetic resin.
As shown in FIG. 1, the synthetic rubber covers the ring core material A, which has a ring core material A as a skeleton and has an annular protruding strip 2 having at least one notch 1 serving as a groove in the axial direction on both the upper and lower surfaces. , or a washer seal made of an elastic body B such as a soft synthetic resin, in which the thickness of the outer peripheral part 3 and the inner peripheral part 4 of the elastic body B is thicker than the surface thickness of the annular projection strip 2, and the The thickness of the circumferential surface between the outer circumferential part 3 and the inner circumferential part 4 including the annular protruding strip 2 is equal to the surface thickness of the annular protruding strip 2, or is slightly thicker without exceeding the thickness of the inner and outer circumferential surfaces 3 and 4. ,
In addition, a protruding ring 5 made of an elastic material that is thicker than the inner and outer circumferential surfaces 3 and 4 is provided in the middle of both sides of the circumferential surface.

As shown in FIG. 3, when this washer seal is tightened, the contact surfaces of the fastening member 7 and the fixing member 6 first come into contact with the elastic projection rings 5 on both sides of the washer seal, and the tightened projection rings 5 deforms to relieve the clamping pressure, but before the protrusion ring 5 is deformed to the extreme, the upper and lower sealing surfaces of the outer circumferential part 3 and the inner circumferential part 4 absorb the compression, so that mutually optimum clamping pressure is maintained and a good condition is achieved. Demonstrates sealing properties. In addition, if this tightening pressure is excessive, the protruding ring 5 will be strongly tightened while rotating, but the notch 1 provided in the annular protruding strip 2 of the ring core material A will firmly fix the protruding ring 5. The core material A and the protrusion ring 5 are firmly held without being disassembled, and the clamping pressure that cannot be completely relieved is transferred to the sealing surfaces of the outer peripheral part 3 and the inner peripheral part 4. This clamping pressure compresses the outer circumferential part 3 and the inner circumferential part 4, but since all the compression is received by the surface of the annular protrusion 2 of the ring core material A, no unreasonable pressure is applied to the outer circumferential part 3 and the inner circumferential part 4. , unlike in the past, the elastic body B does not break or weaken the sealing performance,
It also has the advantage of being able to 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 7, the fixing member 6, 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, in terms of shape, as shown in FIG. 3, the upper and lower surfaces of the washer seal have the same shape so that it can be attached to the fixing member 6 whose fastening part is concave.
If the side surface of the outer peripheral part 3 is shaped so that the intermediate part protrudes outward and the side surface of the inner peripheral part 4 is shaped so that the intermediate part protrudes inward, the washer seal and the fastening member 7 can be easily fitted into the recess of the fixing member 6 without making a mistake in sealing surface. It can be inserted into any shape, and the fixing member 6 and fastening member 7 can be tightened while maintaining accurate spacing, making it easy to determine the position of the fixing member 6 itself, and minimizing the amount of deformation due to compression of the elastic body B. It has many advantages, such as being able to hold it in place and creating a sealing effect on the sides.

As described above, the washer seal of the present invention has a simple structure, greatly improves sealing performance, has 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... Notch,
2... Annular protruding strip, 3... Outer periphery, 4... Inner periphery, 5... Projection ring, 6... Fixing member, 7... Fastening member, 8... Metal ring, 9... Synthetic rubber, 10...
Fastening member, 11...fixing member.

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; at least the upper and lower surfaces of the ring core material The thickness of the outer circumferential part and the inner circumferential part of the elastic body provided to cover the ring core material, which is equipped with an annular protruding strip having one or more notches serving as grooves in the axial direction, is the thickness of the annular protruding strip surface. The thickness of the circumferential surface between the outer circumferential part and the inner circumferential part that continuously includes the annular protrusion strip is equal to the surface thickness of the annular protrusion strip, or exceeds the thickness of the inner and outer circumferential surfaces. This washer seal is characterized by a structure in which the washer seal is slightly thicker, and protruding rings made of an elastic material are attached to the middle of both sides of the circumferential surface between the two so as to be thicker than the inner and outer circumferential surfaces.