JPH0122839Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a gasket for a fixture used when attaching a corrugated plate to a support wall or the like.

In the conventional example shown in Fig. 1, a corrugated plate e is attached to a support wall f using a perforated disc-shaped rubber gasket a, a washer b, a bolt c, and a nut d.
When tightened, the rubber gasket a and its center hole g expand in diameter outward in the radial direction p and are warped. For this reason, a gap is likely to occur between the corrugated plate e and the rubber seal a, and since the center hole g is widened, rainwater can leak through the gap and the bolt insertion hole h of the corrugated plate e, or between the bolt c and the washer. There is a drawback that the corrugated plate e easily enters the inside of the corrugated plate e through the gap between the corrugated plate e and the center hole g and the bolt insertion hole h.
Another problem is that the elasticity of the rubber seal a deteriorates with use, making the above-mentioned drawbacks more noticeable.

In order to correct the drawbacks of the above-mentioned conventional example, the present invention has a corrugated plate fitting packing A made of rubber or a synthetic resin with rubber elasticity, has an approximately acacia bead shape in outer shape, and has an inner wall in the center hole 1. It is characterized in that the circumferential surface 2 is hollowed out in the shape of an annular groove.

Packaging A of the embodiment shown in FIGS. 2 and 3
is an annular groove formed by integrally molding rubber, having an approximately abacus bead shape, and having a small-diameter circular protrusion 3 at its outer end, and by gouging the inner circumferential surface 2 of the center hole 1. 4 has a V-shaped cross section. Although the packing A has an annular groove 4 inside, it can be integrally molded using a mold because the packing A deforms due to rubber elasticity when removed from the mold. Therefore, the manufacturing cost of this packing A is almost the same as that of the conventional packing.

This packing A is used as shown in FIG. That is, the corrugated plate 5 includes the packing A, a washer 6 that fits into the circular protrusion 3, a bolt 10 having a drill point 7, a threaded shaft portion 8, and a washer portion 9, and a nut that is screwed into the threaded shaft portion 8. 11 to be attached to the support wall 12.

When the bolt 10 is tightened, as shown in FIG.
3 has the annular groove 4 on the right side in FIG. 3, so it deforms into a curved shape, and the inner peripheral end 14 bites into the shaft 15 of the bolt 10, so the sealing performance between the two is extremely high. . Furthermore, although the inner peripheral end 14 is curved and deformed to the right in FIG. 3, as a reaction to this, it is always subjected to a large restoring force to the left, so that the inner peripheral end 14 is in close contact with the corrugated plate 5. As a result, the sealing performance between the corrugated plate 5 and the packing A becomes very high. Moreover, since the restoring force is generated by the shape of the packing A, even if the rubber deteriorates due to long-term use, the restoring force will not decrease much, and as a result, the sealing performance between the corrugated plate 5 and the packing A will be maintained for a long time. remains high throughout. As mentioned above, the packing A and the bolt 10
sealing with the shaft 15 and the seal A and the corrugated plate 5.
Since the sealing performance is high, it is possible to reliably prevent rainwater from entering the inside of the corrugated sheet 5 through the bolt insertion holes 16 of the corrugated sheet 5.

Further, according to this embodiment, the adhesion between the circular protruding portion 3 of the packing A and the washer portion 9 of the bolt 10, and thus the sealing ability, is also high, and it is possible to prevent rainwater from entering from this portion.

The present invention can be configured in various ways in addition to the configuration described above. For example, the packing A may be integrally molded from a synthetic resin having rubber elasticity. Further, the circular protrusion 3 is not essential to the present invention, and the gasket A may be formed symmetrically. The packing A of the present invention can also be used by being incorporated into a fixture that combines a normal bolt, washer, and nut, or a fixture that combines a nail and a washer. Furthermore, it goes without saying that the cross-sectional shape of the annular groove portion 4 is not limited to the V-shape.

Since the present invention has the above-mentioned configuration, when used by incorporating it into a corrugated board fixture, it can reliably prevent rainwater from entering inside the corrugated board, and maintain the effect of preventing rainwater from entering even during long-term use. It has the advantage of being possible.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view of a conventional example, FIG. 2 is a partially longitudinal sectional side view showing an embodiment of the present invention, and FIG. 3 is an enlarged longitudinal sectional side view of a main part showing the operation of the present invention. 1... Center hole, 2... Inner peripheral surface, 4... Annular groove.

Claims (1)

[Scope of utility model registration request] Made of rubber or synthetic resin with rubber elasticity,
A packing for a corrugated plate fitting, characterized in that its outer shape is approximately abacus bead-shaped, and the inner circumferential surface of the center hole is hollowed out in the shape of an annular groove.