JPH0211232Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a door weather strip for an automobile.

Modern automobiles are strongly required to be quiet when driving at high speeds. One of the factors that affects quietness is wind noise caused by air flow while driving. This wind noise is represented by the symbol P in Figure 1.
The wind noise is loudest at the position immediately behind the front pillar shown in , and is thought to be caused by air noise leaking through gaps between closed windows and vortices generated by unevenness on the outside of the car body. Therefore, one measure to reduce such wind noise is to provide a double seal structure, that is, a door weather strip, on both the door side and the body side to increase the airtightness of the door glass. It is being done.

FIG. 2 shows an example of a conventional weather strip with a single seal structure, in which a door weather strip 3 provided around a door glass 2 for a door glass 1 is formed in close contact with a body 4. I'm starting to do that. Reference numeral 5 is a door glass run. If a car with such a single-seal weather strip structure were to be redesigned to make it even quieter, it would be necessary to make a major design change to the trim 7 that covers the pillar 6 and modify the model, which would reduce costs. becomes disadvantageous. In addition, in the conventional double-seal structure weatherstrip shown in FIG. 3, the weatherstrip 8 provided on the door side is integrally formed with the welt or opening trim 9 inserted into the joint between the body flange 4a and the pillar flange 6a. and welt 9
A wire insert is provided inside for reinforcement, which increases the cost accordingly.

The purpose of this invention is to provide a low-cost, improved door weather strip that can be made into a double-seal structure by making minor changes to the trim, even for automobiles that have conventional weather strips with a single-seal structure. be.

The weather strip 10 according to this invention has a hard rubber part 11 having a recess 11a that can be inserted into the joint between the body flange 4a and the pillar flange 6a, as shown in FIGS. 4 and 5, for example.
and a soft rubber part 12 which is formed together with the hard rubber part 11 by continuous double extrusion molding and has a hollow cross section 12a that can be deformed by the pressure of the door frame 2. The hard rubber section 11 is made of solid rubber, and the soft rubber section 12 is made of sponge rubber such as EPDM. Hard rubber part 11 and soft rubber part 1
2 is usually vulcanized and bonded during continuous double extrusion molding.

This weather strip 10 can be held simply by being inserted into the joint between the body flange 4a and the pillar flange 6a, but the bottom surface 11b of the hard rubber portion 11 may be adhered to the body 4 with butyl tape or the like. Further, in this embodiment, a gap 10a is provided between the hard rubber part 11 and the soft rubber part 12, but this gap 10a is not necessarily necessary. However, it is more convenient if the trim 7 is heated, since it can accommodate various folded shapes of the trim 7.
By inserting the trim 7, the trim 7 can be prevented from wobbling, and if the weather strip 10 is not attached to the body 4, the weather strip 10 can be prevented from falling off. In the conventional example shown in FIG. 2, this rattling is prevented by ribs 7b provided on the trim 7.

As described above, according to the door weather strip of this invention, the hard rubber part for attachment to the body and the soft rubber part for the weather strip are molded by continuous double extrusion molding, resulting in low cost. It can be manufactured, and even if an automobile has a conventional single-seal structure, it can be changed to a double-seal structure as is or by only making small changes to the trim, further improving quietness during high-speed driving. In addition, by creating a gap between the hard rubber part and the soft rubber part, it is possible to accommodate various folded shapes of the trim end that covers the joint of the body flange and pillar flange, and the folded part can be placed in the gap. By inserting the weather strip, it is possible to prevent the trim from wobbling and to prevent the weather strip from falling off.

[Brief explanation of the drawing]

Fig. 1 is a schematic external view of an automobile, Fig. 2 is a partial sectional view taken along line A-A in Fig. 1 in the conventional case, and Fig. 3 is a second diagram of the conventional double seal structure. FIG. 4 is a view similar to FIG. 2 showing an embodiment of this invention, and FIG. 5 is a sectional view showing an example of a weather strip according to this invention. P...Front pillar, 1...Door glass, 2
...Door sash, 3...Door side weather strip, 4...Body, 5...Door glass run, 6...
...Pillar, 7...Trim, 8...Body side weather strip, 9...Opening trim, 10...
...Body side weather strip, 11...Hard rubber part, 12...Soft rubber part.

Claims (1)

[Scope of utility model registration request] A door weather strip that is attached to the body side, and is formed by a continuous double extrusion method, including a hard rubber part having a recess that can be inserted into the joint between the body flange and the pillar flange, and the hard rubber part. and a soft rubber part having a hollow cross section that can be deformed by the pressure of the door, and an end of a trim that covers the joint between the hard rubber part and the soft rubber part. A door weather strip characterized by having a gap into which a part can be inserted.