JPH0246406B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to door weather strips for automobiles.

PRIOR ART As is well known, an automobile weather strip is attached endlessly to the periphery of a door, and comes into close contact with the opening edge of the vehicle body when the door is closed, thereby sealing the inside and outside of the vehicle interior. The seal lip, which is in close contact with the opening edge of the vehicle body, is hollow and suppresses the seal reaction force to a certain extent so that it does not adversely affect door closing. In addition, as the door weather strip is attached to the door periphery in an endless manner as mentioned above, the seal lip at the corner of the door tends to fall inward and deform, so measures are taken to prevent the seal lip from falling. As a known seal lip, a seal lip has legs protruding from the inner periphery for support. To explain this with reference to Fig. 2, reference numeral 1 indicates a door weather strip attached to the door periphery in an endless manner, and on the side of the door main body D shown in Fig. and on the door sash S side, it is fitted and fixed into a fitting groove (not shown) formed on its outer periphery. This door weather strip 1 includes a base portion 2 fixed to the door peripheral portion as described above, and a substantially elliptical cross section that is integrally molded with the base portion 2 and comes into close contact with the vehicle body opening edge B when the door is closed. Hollow seal lip 3
A supporting leg piece 4 is integrally provided on the inner periphery of the hollow seal lip 3. As described above, by providing the leg pieces 4 protruding from the inner periphery of the hollow seal lip 3, the leg pieces 4 can be used, for example, at the corners of the door periphery where the door weather strip 1 is curved and attached. On the main body D side, its mounting surface
Da as shown by the solid line in Figure 2, and the leg piece 4
The seal lip 3 acts as a support and can prevent the seal lip 3 from falling and deforming toward the inner circumference.

However, in such a conventional configuration, although the leg piece 4 can prevent the seal lip 3 from collapsing and deforming at the corner of the outer periphery of the door, if the tip of the seal lip 3 comes into close contact with the vehicle body opening edge B when the door is closed, The seal lip 3 is attached not only to the general part of the door periphery but also to the corner part as shown by the chain line in Figure 2.
is compressed and deformed as a whole starting from its tip, so
The leg piece 4 is raised above the mounting surface Da. For this reason, the seal lip 3 cannot obtain a seal reaction force using the leg piece 4 as a medium, and if the car wash water directly hits the seal part during a car wash, etc., the part of the seal lip 3 in close contact with the car body opening edge B will be slightly damaged. There was a problem in that it penetrated the clearance, making it impossible to take thorough waterproofing measures.

Purpose of the Invention In view of the conventional situation, the present invention is capable of preventing the hollow seal lip from collapsing and deforming at the corners of the door periphery, and improving the sealing performance without adversely affecting the door closing performance. The purpose of the present invention is to provide a door weather strip for automobiles that is capable of providing a weather strip for automobiles.

Structure of the Invention In order to achieve the above object, in the present invention, the portion of the hollow seal lip that comes into close contact with the edge of the vehicle body opening is formed as a substantially flat abutting surface, and the inner peripheral side of the hollow lip is formed as the abutting surface. The legs extend across the base part, and are formed as legs having a substantially V-shaped cross section that elastically deform in the width direction when the door is closed and extend toward the weather strip mounting surface at the door periphery.

Embodiments Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings, with the same reference numerals assigned to the same parts as in the conventional structure.

In FIG. 3, reference numeral 10 indicates a door weather strip that is attached to the door periphery in an endless manner. It consists of a hollow seal lip 12 that is in close contact with the vehicle body opening edge B. The portion of the hollow seal lip 12 that comes into close contact with the vehicle body opening edge B is a substantially flat contact surface 13.
It is formed as. Further, the inner peripheral side of the hollow seal lip 12 extends across the abutment surface 13 and the base portion 11, and is elastically deformed in the width direction when the door is closed, to form a seal on the weather strip mounting surface of the door periphery, for example, on the door body D side. In this case, the leg portion 14 is formed as a substantially V-shaped cross section extending toward the mounting surface Da. Further, a thick portion 15 is formed at the outer edge of the abutment surface 13, that is, at a connecting portion between the outer circumferential wall of the hollow seal lip 12 and the abutment surface 13, so that the seal lip 12
When the thick wall portion 15 comes into close contact with the vehicle body opening edge B
As a result, the outer edge of the abutment surface 13 is bent and deformed toward the vehicle body side sealing surface Ba of the vehicle body opening edge B, so that it can apply strong pressure to the sealing surface Ba.

According to the structure of the above embodiment, the hollow seal lip 12 tends to be deformed inwardly at the corner portion of the outer peripheral edge of the door, but in this case, the leg portion 14 having a substantially V-shaped cross section Since the hollow seal lip 12 comes into contact with the lip and serves as a support, it is possible to prevent the hollow seal lip 12 from falling and deforming. Furthermore, when the hollow seal lip 12 comes into close contact with the vehicle body opening edge B when the door is closed,
Since the substantially flat abutment surface 13 of the seal lip 12 comes into close contact with the vehicle body opening edge B, the leg portion 14 is compressively deformed so that its substantially V-shaped cross section is narrowed, and as a result, the leg portion 14 is compressed and deformed so that the inner circumference As a result, as shown by the chain line in FIG. 3, the contact surface 13 is brought into close contact with the inner sealing surface Bb of the vehicle body opening edge B by the supporting action of the legs 14, i.e. ,
This increases the sealing reaction force and further improves the sealing performance. Since this sealing reaction force acts in the radial direction of the vehicle body opening edge B, it does not adversely affect the locking action of the door peripheral locking device (not shown), that is, the door closing performance. Furthermore, by setting the thick wall portion 15 at the outer edge of the abutment surface 13 as in this embodiment, the outer edge of the abutment surface 13 comes into close contact with the vehicle exterior sealing surface Ba, thereby further sealing the abutment surface 13. The effect can be increased.

Effects of the Invention As described above, according to the present invention, it is possible to prevent the hollow seal lip from collapsing and deforming at the corner portion of the door periphery, and it is also possible to prevent the legs from floating when the door is closed. Since the degree of close contact between the seal lip and the edge of the vehicle body opening can be increased without adversely affecting the sealing performance, the sealing performance can be further improved, which has a great practical effect of increasing quality and reliability.

[Brief explanation of drawings]

Fig. 1 is a side external view of an automobile, Fig. 2 is a sectional view taken along the line - Fig. 1 showing a conventional structure, and Fig. 3 is a sectional view similar to Fig. 2 showing an embodiment of the present invention. be. 10... Door weather strip, 11... Base part, 12... Hollow seal lip, 13... Contact surface, 14... Leg part, Da... Weather strip mounting surface, B... Vehicle body opening edge .

Claims (1)

[Claims] 1. In a structure comprising a base portion fixed to the peripheral edge of the door, and a hollow seal lip that is integrally molded on the base portion and comes into close contact with the edge of the vehicle body opening when the door is closed, the hollow seal lip is attached to the edge of the vehicle body opening. The part in close contact is formed as a substantially flat abutment surface, and the inner circumferential side of the hollow seal lip extends across the abutment surface and the base part, and when the door is closed, it elastically deforms in the width direction to create a weather strip around the door periphery. A door weather strip for an automobile, characterized in that it is formed as a leg portion having a substantially V-shaped cross section extending toward a lip mounting surface.