JPH11151992A - Weather strip for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain large holding force by small mounting force. SOLUTION: In a weather strip 1 for an automobile insertion mounting a welt part 2 provided with a lip 5 in an inner surface in a connection flange 11 of a car body 10, in a base part of a lip 5, a recessed part 6 is formed, also a lock lip 7 extended from an opening end of the welt part 2 to be folded back in the halfway is provided, a fold back part 7b of the lock lip 7, when mounted in the car body 10, is press held to a part adjacent to the connection flange 11, a tip end thereof is engaged with the recessed part 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to weather strips for motor vehicles.

[0002]

2. Description of the Related Art As shown in FIG. 7, a weather strip a is attached to a side door opening of an automobile. As shown in FIG. 6, the weather strip a includes a pair of small lips c having the same length on one of the inner surfaces of the welt portion b, and the main lip d having a different length on the other of the inner surfaces.
And a sub-lip e, and a joint flange g of the vehicle body panel f
And a welt part b is inserted and mounted. When a detaching force acts on the weather strip a, the sub lip e contacts the base side of the main lip d and functions as a strut member, thereby preventing the weather strip a from being detached.

[0003]

However, since the weather strip "a" suppresses the warp of the main lip "d" by the sub lip "e", a high holding force is obtained. Since not only the main lip d but also the sub lip e are warped, there is a disadvantage that the mounting force is increased.

[0004] In view of such circumstances, an object of the present invention is to provide a weather strip for an automobile which can obtain a large holding force with a small mounting force.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a weather strip for an automobile, in which a welt portion provided with a lip on the inner surface is inserted into a joint flange of a vehicle body and is mounted. And a locking lip that extends from the open end of the welt portion and is folded back halfway, and the folded portion of the locking lip is pressed against a portion adjacent to the joining flange when mounted on a vehicle body, and its tip is Is engaged with the concave portion.

A projection may be formed on the side of the concave portion on the tip side of the lip, and the tip of the locking lip may be formed to have a tapered shape.

[0007]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 shows a cross section taken along the line AA of FIG.
In the drawing, reference numeral 1 denotes a weather strip, and a core bar 3 is inserted into a welt portion 2 having a substantially U-shaped cross section. A hollow lip portion 4 extends from the outer wall 2a of the welt portion 2, and the hollow lip portion 4 is brought into close contact with a sash (not shown) when the side door is closed.

A lip 5 extends on the inner surface of the inner side wall 2b of the welt portion 2 adjacent to the opening end thereof, and a concave portion 6 is formed at the base of the lip 5. Further, a locking lip 7 is provided on the inner wall 2b so as to extend from the opening end thereof and turn back halfway. The locking lip 7 has a bent portion 7a formed at its base, and a portion reaching the folded portion 7b is inclined with respect to the inner wall 2b of the welt portion 2.
Also, a pair of small lips 8, 8 and a raised portion 9 are provided on the outer side wall 2a.
Is provided.

Since the weather strip 1 is constructed as described above, the joining flange 11 of the vehicle body panel 10 is formed.
When the weld portion 2 is inserted into the weld portion 2, the joining flange 11 warps and deforms the lip 5 and the small lip 8.
Is pushed in. Immediately before the attachment of the welt portion 2 is completed, the folded portion 7b of the locking lip 7 abuts on a portion adjacent to the joining flange 11 of the vehicle body panel 10, and the tip of the locking lip 7 is To be engaged.

According to this embodiment, when the welt is inserted into the joint flange 11 of the vehicle body panel 10, only the lip 5 and the small lip 8 are warped and the lip 5 is formed by forming the recess 6 in the base. Since it is easily deformed, the mounting force is small. On the other hand, when the pull-out force acts on the weather strip 1, the retaining lip 7 functions as a tension member against the reversal of the lip 5, so that the retaining force increases.

In addition, when the tip of the locking lip 7 engages with the concave portion 6 of the lip 5, the pushing of the welt portion 2 is regulated, so that the weather strip 1 can be reliably positioned.

In addition, as shown in FIG. 3, the tip of the locking lip 7 is formed in a tapered portion 20 and
The protrusion 21 may be formed on the side surface on the tip side of the lip 5.
By doing so, the effect of suppressing the warp of the lip 5 is enhanced, and the holding force of the weather strip 1 is further increased.

Alternatively, a projection 22 may be provided on the bottom surface of the recess 6 as shown in FIG.

By the way, in the case of the weather strip 30 to be mounted on the trunk lid opening as shown in FIG. 5, the locking lip 7 is provided on the outer wall 31b of the welt portion 31, and the sealing lip 32 extends from the locking lip 7. The tip may be brought into close contact with the vehicle body panel 10. In this case, an improvement in sealing performance can be expected.

[0016]

According to the present invention, when the welt portion is inserted into the joint flange of the vehicle body panel, one lip deforms, and this lip forms a concave portion in the base to facilitate the warp deformation. However, the mounting force can be small, but when the pull-out force acts, the retaining lip functions as a tension member against the reversal of the lip, so that the retaining force increases.

Further, since the pushing of the welt portion is regulated at the stage when the tip of the locking lip engages with the concave portion of the lip, there is an effect that the weather strip can be reliably positioned.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view taken along the line AA of FIG. 7, showing a mounting state of a weather strip of the present invention.

FIG. 2 is a view showing a state in which the weather strip of FIG. 1 is removed from a vehicle body.

FIG. 3 is a partially enlarged view showing a modification of FIG. 1;

FIG. 4 is a partially enlarged view showing a modification of FIG. 1;

FIG. 5 is a view showing a modification of FIG. 1;

FIG. 6 is a diagram showing a conventional example corresponding to FIG. 2;

FIG. 7 is a view showing a state in which a weather strip is mounted on an automobile.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Weather strip 2 ... Welt part 5 ... Lip 6 ... Recess 7 ... Locking lip 7b ... Folding part

Claims (2)

[Claims] 1. A weather strip for an automobile in which a welt portion having a lip on an inner surface is inserted into a joint flange of a vehicle body and mounted, a concave portion is formed in a base portion of the lip, and the lip extends from an opening end of the welt portion. A locking lip that is folded back in the middle is provided, and the folded portion of the locking lip is pressed against a portion adjacent to the joining flange when mounted on the vehicle body, and a tip of the locking lip is engaged with the concave portion. Automotive weather strip. 2. The automotive weather strip according to claim 1, wherein a projection is formed on a side surface of the concave portion on the tip side of the lip, and a tip end of the locking lip is tapered.