JPH023015Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is used in automobile manufacturing, etc., when joining individual exterior panels, attaching trim, or attaching hinges, etc., by inserting the joint between the exterior panels, etc. Concerning seals for sealing parts.

BACKGROUND ART In automobile manufacturing, methods for assembling body panels include arc welding, resistance welding, gas welding, and bolting. Many parts are assembled using bolts; for example, on the front body, outer panel parts such as the front fender and hood front balance panel are assembled using bolts. In addition, in hatchback vehicles, the backdoor is bolted to the roof panel via a hinge.

Conventionally, in order to prevent rain leakage and rust prevention in areas where bolting is used to connect parts such as those mentioned above, tape-like materials or elastic or plastic materials cut or molded into shapes that match the joints have been used. It may be sandwiched with a patch made of . However, due to the elasticity or plasticity of conventional gaskets, it is difficult to maintain a constant tightening torque when tightening bolts, and as a result, there is often the problem that over-tightening causes the gasket to protrude from the joint, resulting in poor appearance. . In addition, these gaskets are usually used when assembling a white body, and then are coated with an electrocoated undercoat and a topcoat, so the rubber elasticity decreases or plasticity increases due to the thermal history of each paint drying oven. This often results in problems such as deformation, inability to maintain the initial torque setting, and poor sealing performance at joints, as well as leakage and rust. Further, at this time, if the gasket protrudes as mentioned above, there is also the disadvantage that rust is likely to occur from that part because the paint cannot be applied to the lower part of the protruding part. Furthermore, the rubber elasticity of the seal decreases or plastically deforms over time, resulting in a decrease in torque, which reduces the sealing performance of the joint and causes rain leakage and rust. This is a frequent problem, especially in the hinge portion of the rear door of a hatchback vehicle, and a fundamental solution has been desired.

The present invention is an attempt to solve the above-mentioned problems of the conventional sealing gasket, and the present invention will be described below with reference to embodiments and drawings.

FIG. 1 is a perspective view showing an embodiment of the present invention, in which a plurality of rigid spherical bodies 2 are arranged in an elastic or plastic body 1.

Here, as the elastic body or plastic body 1, a commonly used packing material may be used, such as an unvulcanized, semi-vulcanized or vulcanized rubber material,
Butyl rubber, EPDM, etc. may also be used. Further, its shape may be determined depending on the application, and may be cut or molded into a tape shape or into a shape matching the joint portion.

The rigid spherical bodies 2 include metal materials such as steel, stainless steel, zinc, or steel coated with zinc, inorganic materials such as ceramic materials such as silica, alumina, silicon carbide, and silicon nitride, and various other materials. Although glass can be used alone or in combination, experience has shown that the use of ceramic materials or glass materials is particularly good, with no rust caused by electrolytic corrosion.

Furthermore, when a zinc material or its equivalent is used for the spherical body alone or in combination with a spherical body made of other materials, the sacrificial corrosion of the zinc results in a packing with a high rust prevention effect.

It is desirable that the particle size of the spherical bodies be as uniform as possible in order to uniformly receive the clamping pressure. Further, the particle size is suitably smaller than the thickness of the elastic or plastic body. Furthermore, the arrangement of the spherical bodies may be on the entire surface or in parts, and it is desirable to determine this after testing (Fig. 3). Furthermore, since the spherical bodies have the property of becoming more oriented by tightening due to their shape, their arrangement may be random or, for example, the spherical bodies may be kneaded into an elastic body in advance and then molded (FIG. 5). Furthermore, the same effect can be obtained regardless of whether it is placed inside the elastic or plastic body, placed near the surface of the elastic or plastic body, or placed on the surface of the elastic or plastic body. (Figures 6 and 7).

Since the present invention has the above-mentioned configuration, when it is not used, it is sufficient to carry out ordinary bolt tightening work, that is, as shown in Fig. 8, the present invention is used between the parts to be joined. Just insert the packing and then tighten the bolts. At this time, when the bolt is tightened, the joint part comes into contact with the spherical body, and since the spherical body has rigidity, it plays the role of a spacer to maintain the gap, so the tightening torque is constant, and moreover, it is possible to tighten more than necessary. Since there is no elastic body or plastic body sticking out (Fig. 9). Further, since the joint is a metal member-spherical body-metal member and no elastic or plastic body is interposed between them, there is no loss of torque due to heat history or age, and no deterioration of sealing performance occurs.

The present invention provides a packing that does not protrude as described above and has good sealing properties without leakage or rusting because there is no torque change.

Furthermore, the following cases can be considered as embodiments of the present invention.

(a) The packing of the present invention in which the elastic or plastic body is made of an adhesive material.

With the above configuration, since the elastic body or the plastic body has adhesiveness, the work of attaching the vertical portion etc. becomes easy.

(b) The packing of the present invention (Fig. 10), in which the elastic body or the plastic body is made of an adhesive material, and one side of the body is covered with a heat-melting film such as polyethylene.

With the above configuration, the installation work is facilitated, and since one side is non-adhesive, the positioning work is also facilitated. In addition, the heat-melting film acts as a reinforcing material and has the effect of preventing deformation and destruction of the packing during installation work.

(c) The packing of the present invention, which has a woven fabric sandwiched between an elastic body or a plastic body.

With the above structure, the woven fabric acts as a reinforcing material, preventing deformation of the packing during installation work.
It also has the effect of preventing destruction.

This product has the above-mentioned effects, and has a wide range of applications.It can be used not only as a seal when assembling body panels and as a hinge seal, but also as a seal when attaching a mark/name plate, and when attaching a garnish mold. Can also be used for sealing or trim packing.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a first embodiment of the present invention. FIG. 2 shows A- of the first embodiment of the present invention.
It is an A′ cross-sectional view. FIG. 3 is a perspective view of a second embodiment of the present invention. Figure 4 shows the second part of the present invention.
It is a BB' sectional view of an embodiment. FIG. 5 is a cross-sectional view of an embodiment of the invention. FIG. 6 is a cross-sectional view of an embodiment of the invention. FIG. 7 is a cross-sectional view of an embodiment of the invention. FIG. 8 is a sectional view illustrating the use of the present invention. FIG. 9 is a sectional view illustrating the use of the present invention. FIG. 10 is a cross-sectional view of an embodiment of the invention. 1 and 1' are elastic bodies or plastic bodies, 2 is a spherical body having rigidity, 3 is a bolt mounting hole, 4 is a hinge, 5 is a bolt, 6 is a nut, 7 is a body panel, 8 is a hot melt film.

Claims (1)

[Claims for Utility Model Registration] (1) A packing characterized in that a plurality of rigid spherical bodies 2 are arranged in an elastic body or a plastic body 1. (2) The packing according to claim 1, wherein the rigid spherical body is made of a metal material, ceramic material, or glass material.