JPH01168519A - Weather strip for automobile - Google Patents

Abstract

PURPOSE:To eliminate lubricity processing after molding of a corner part, by a method wherein, in a weather strip for a door, the extension part of a seal lip is formed to the end part of a weather strip extending along a waistline and is built in the end part of the waistline of a corner part. CONSTITUTION:A weather strip 22 along a waistline is formed with an outer weather strip 22A and an inner weather strip 22B, positioned facing a corner part 23, and mounting base parts 221 formed in an U-shape and seal lips 222 are mounted to the respective weather strips. In the terminals of the weather strips 22A and 22B, the outer half part of a mounting base part 221 is cut and an extension part 222' of the seal lip 222, and flocking is performed after extrusion-molding. The seal lip 222' is engaged with a stepped part 235 formed at the corner part 23. This constitution enable elimination of lubricity processing after formation of the corner part.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a weather strip attached to an automobile door, and particularly to the structure of a corner portion thereof.

[Prior Art] As shown in FIG. 1, a weather strip 2 is attached to a door 1 of an automobile in a series along a door frame 11 and a waistline 12 thereof. Weatherstrip 2 is made by connecting linearly extruded weatherstrips with molded bodies.

It forms the inner part.

FIG. 7 shows the molded corner portion 23 (FIG. 1). The corner portion 24 also has substantially the same structure. Molded corner portions 23 extend in a substantially L-shape from both sides of the lower end of the extruded weather strip 21 attached to the frame 11 (FIG. 1), and end at the waist line 12 (
Extrusion-molded weather strip 22 (first
(Figure). The waist line 12 side of the molded corner portion 23 is an outer portion 23A and an inner portion 23B.
They are separated into two parts, each having a sealing lip 232, and these lips 232 are opposed to each other. The extrusion-molded weatherstrip 22 along the waistline 12 also consists of an outer weatherstrip and an inner weatherstrip that have the same cross-sectional shape as the above-mentioned molded outer parts 23A and 23B. The door glass moves up and down between the seal lips of the outer weather strip and the inner weather strip.

[Problems to be Solved by the Invention] Both seal lips of the weather strip 22 are required to have good sliding properties on the door glass. For this reason, a lubricity treatment step is provided after extrusion molding to perform lubricity treatment such as flocking the seal lip or applying a lubricant.

By the way, it is desirable that the seal lips 232 of the molded corner portions 23 are also treated to make them slippery, but it is extremely troublesome to treat the seal lips 232 to make them smoother after the corner portions are connected by molding.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a weather strip, particularly a structure of the corner portion, which can impart lubricity to the seal lip of the corner portion without performing lubricity treatment after molding the corner portion. It is something.

[Means for Solving the Problems] The present invention provides a weather strip, particularly a lower end portion of the extruded weather strip along the inner periphery of a door frame, and a terminal portion of the extruded weather strip along the waistline. In the weather strip connected at the corner,
As shown in FIGS. 3 and 4, the molded corner portion 23
The seal lip (24) is constructed by incorporating an extension 222'' of the seal lip formed at the end of the weather strip 22 along the waistline into the molded corner portion 23.

[Operations and Effects] In the weatherstrip of the present invention, if the seal lip of the extruded weatherstrip along the waist line is treated with lubricity, the seal lip along the waist line will have lubricity over the entire length including the corner portion. , the sliding performance of the door glass that moves up and down is improved. In addition, there is no need to apply smoothness treatment to the corners after molding them.
Productivity improves.

[Example] As shown in FIG.
It is attached in series along the door frame 11 and waist line 12 of the. The weatherstrip 2 is formed by connecting extruded linear weatherstrips with molded bodies to form corner portions. As shown in FIG. 2, the extrusion-molded weather strip 21 along the door frame has retaining lips 210 on both sides of the main body that form mounting bases 211 with a U-shaped cross section to be held on the flanges of the door frame 11. The opening has a seal lip 212 extending in opposite directions and sandwiching both sides of the door glass.

Extruded door weather strip 2 as shown in Figure 3
The lower end of 1 is the retaining lip 210 of the base with both stations (Fig. 2).
are cut out, and corner portions 23 extending in a substantially L-shape on both sides are connected by molding. Mold forming corner part 2
The weather strip 21 side of No. 3 has a shape that restores the removed retaining lip.

On the waist line side of the molded corner portion 23, an outer portion 23A and an inner portion 23B that are separated from each other are molded. The image portions 23A and 23B both have an L-shaped cross section as shown in FIGS. 5 and 6 (only the outer side is shown), and the thick proximal end side has a stepped portion 235 on the inner lower surface as shown in FIG.
The thin end side has a stepped portion 2 on the inner upper surface as shown in Fig. 6.
36, and the steps 235, 236 are continuous.

On the other hand, the extrusion-molded weather strip 22 along the waist line 12 consists of an outer weather strip 22A and an inner weather strip 22B corresponding to the corner portion 23, and both weather strips 22A and 22B each have a mounting base 221 with a U-shaped cross section. and a seal lip 222, both lips 222 are opposed to each other and their tips are substantially in contact with each other. As shown in FIGS. 3 and 4, both weatherstrips 22A and 22B are provided with an extension 222° of a seal lip 222 by cutting off an external portion of a mounting base 221 at the end. The sealing lips 222, 222- are flocked after extrusion. Note that 220 is a sheet metal insert.

Therefore, the door frame 11 and the waist line 12
To configure the weather strip 2 along the door frame 11, the weather strip 21, which is attached along the door frame 11 and has a molded corner portion 23, 24 formed at the lower end thereof, is attached to the door frame 11 by its mounting base 211. . Next, outer and inner weather strips 22A, 22B
is attached by its mounting base 222 to a flange on the upper edge of the outer panel and a flange on the upper edge of the inner panel of the door, which form the waist line 12, respectively. Then, both base ends of the weather strips 22A, 22B are brought into contact with the ends of the outer and inner portions 23A, 23B of the molded corner portion 23.24, and the extension seal lip 222- is brought into contact with the ends of the outer and inner portions 23A, 23B of the molded corner portion 23.24. Step part 235.23
6 connects the weather strip 22 to the corner portions 23, 24.

As a result, the door frame 11 and the waist line 12
A series of weather strips 2 are attached along the waist line 12, and the seal lip along the waist line 12 extends over the entire length, and is extruded and flocked with a seal lip 222.2.
It will be composed of 22".

In this manner, in the weatherstrip of the present invention, the seal lip along the waistline can be imparted with lubricity over its entire length including the molded corner portions without performing any lubricity treatment after the corner portions are formed.

[Brief explanation of the drawing]

1 to 6 show embodiments of the present invention; FIG. 1 is a front view of the upper part of an automobile door equipped with a weather strip; FIG. 2 is a sectional view taken along line I4 of FIG. 1; Fig. 3 is a perspective view of the corner section, Fig. 4 is a view showing the end of the weather strip along the waist line, and Fig. 5 is a perspective view of the corner section.
6 is a sectional view taken along the line VI-Vl in FIG. 3,
FIG. 7 is a perspective view of a molded corner portion of a conventional weatherstrip. 11...Door frame 12...Waist line 21.22...Extruded weather strip 23
．． 24...Mold forming corner part 222...
Seal lip 222゛... Seal lip extension part 1 Fig. 2 Σ N2] Fig. 5 Fig. 6 Fig. 70

Claims (1)

[Claims] In the weather strip, the edge of the extruded weather strip along the inner circumference of the automobile door and the edge of the extruded weather strip along the waist line of the door are connected at the molded corner. an extension of a seal lip is formed at the end of the weather strip along the
A weather strip for an automobile, characterized in that the extension part is incorporated into the end of the molded corner part on the waist line side to constitute a seal lip of the molded corner part.