JPH02227328A - Weather strip for automobile - Google Patents

Abstract

PURPOSE:To reduce a sectional form of a hollow seal part and prevent any interference with other members as well as to aim at the promotion of low-unit cost of production by installing a means, which bends and deforms a corner part contact spot inward a hollow part at time of door closure, in a contact part of the hollow seal part. CONSTITUTION:A bending part 22 formed in an almost central part contacting with a corner part C of an opening edge 24 between both ends 20, 21 of a hollow seal part 15 is made into being free of bending inward a hollow part 23. When a door 12 is rotated in an arrow direction, the whole body of a contact part 18 of the hollow seal part 15 comes into contact with the opening edge 24 and thereby flexibly deformed, the bending part 22 is flexibly bent and deformed inward the hollow part 23 as it is in the shape of being accustomed to an angle of the corner part C, a so that a seal surface between one end 20 and the other end 21 comes into contact with an outer circumferential edge 25 and a peripheral edge 26 respectively in a close coherent state. In addition, when the door 12 is pushed and fully closed, the hollow seal part 15 is flexibly bent and deformed at a deflection value of about 6 - 12mm as the bending part 22 goes along an angle of the corner part C, thus the whole body of the seal surface 19 is made to adhere to the opening edge 24 so closely.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an automobile weatherstrip fixed to a door periphery.

2. Description of the Related Art Conventional automotive weather strips include those shown in FIGS. 6 and 7, for example.

That is, this weather strip 1 is fixed to the periphery of the sash S of the door D, and is pressed against the opening edge B of the vehicle body A to seal between the two members. A base 2 is fixed to the base 2, and a hollow seal portion 3 is provided at the upper end of the base 2. This hollow seal part 3
As shown in FIGS. 7 and 8, the contact portion 4 has a substantially rectangular shape and has a sealing surface at its front end. The substantially central portion 4a of the contact portion 4 contacts the corner portion C of the vehicle body opening edge B when the door is closed. and is flexibly deformed into the hollow portion 5, so that the one end 4b and the other end 4C of the contact portion 4 come into pressure contact with the vertical surface B1 and the horizontal surface B adjacent to the corner portion C, respectively. There is. In this way, a two-sided seal is obtained by both ends 4b and 4c while the central part 4a of the contact portion 4 is flexibly deformed inward, so a larger sealing area is secured compared to a one-sided seal. , abrasion due to upward slippage of the hollow seal portion 3 is prevented, and sealing performance can be improved (see Japanese Patent Application Laid-Open No. 186730/1983).

Problems to be Solved by the Invention However, in the above-mentioned conventional weather strip,
Although sealing performance can be improved by a two-sided seal,
Since the hollow seal portion 3 has a substantially uniform wall thickness and relatively high rigidity, the center portion 4a of the contact portion 4 can be flexibly bent to conform to the shape of the corner portion C by its own reaction force. Therefore, both ends 4b and 4c cannot be brought into close contact with the vertical surface B and the horizontal surface B. therefore,
In order to ensure such adhesion, the cross-sectional shape of the hollow seal portion 3 must be set large, which results in interference with other members and an increase in manufacturing costs.

Means for Solving the Problems The present invention has been devised in view of the above-mentioned conventional problems, and in particular, the corner portion of the contact portion of the hollow seal portion is moved inside the hollow portion when the door is closed. It is characterized in that it is provided with a bending means for bending and deforming it in one direction.

According to the present invention having the above configuration, when the contact portion of the hollow seal portion hits the corner portion of the edge of the vehicle body opening when the door is closed, the contact portion of the contact portion is bent by the bending means according to the angle of the corner portion. flexibly bends and deforms inward of the hollow part. Therefore, even if the cross-sectional shape of the hollow seal portion is small (even if the cross-sectional shape of the hollow seal portion is small), the entire contact portion can be brought into close contact with the periphery of the corner portion.

Example Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 shows a first embodiment of the present invention, in which the weather strip 11 has a retainer 13 on the peripheral edge of the door 12.
A hollow base 14 having a substantially triangular cross section and a hollow seal portion 15 provided on one side of the base 14 are integrally molded from a synthetic rubber material. The hollow seal portion 15 has a generally diamond-shaped cross section, and has a generally horizontally L-shaped upper end portion 16 that rises upward from the upper side of the base 14 in the figure, and a lower end portion 16 of the hollow seal portion 15 that extends upward from the lower side of the base 14 in the figure. It has a lower end portion 17 that protrudes in a substantially horizontal direction, and an abutment portion 18 that connects the upper and lower end portions 16 and 17.

This abutting portion 18 has a sealing surface 19 that abuts against an opening edge 24 of the vehicle body, which will be described later, on the entire outer surface, and is bulged toward the opening edge 24 side. The opening edge 24 is provided with one end 20 that comes into contact with the outer peripheral edge 25 of the opening edge 24, and the other end 21 that comes into contact with the peripheral edge 26 of the opening edge 24. A bent portion 22 serving as a bending means is formed at a substantially central location that abuts the corner portion C, and this bent portion 22 is formed in a curved shape to bulge inward of the hollow portion 23 .
It can be bent inward.

Therefore, according to this embodiment, when the rA door is opened, the door 12
is rotated in the direction of the vehicle body opening edge 24 (in the direction of the arrow), and the entire contact area 18 of the hollow seal part 15 comes into contact with the opening edge 24 as shown in FIG. When deformed, the bent portion 22 flexibly bends inward in the hollow portion 23 while adapting to the angle of the corner portion C, so that the sealing surfaces 19 of the one end portion 20 and the other end portion 21 are aligned with the outer peripheral edge 25 and the peripheral edge, respectively. It comes into close contact with the portion 26. Furthermore, door I2
When the door is completely closed by pushing in the closing direction, the hollow seal part 15
is deformed by a standard deflection amount of approximately 6 to 81 m1+ as shown in FIG.
The entirety of 9 is in close contact with the opening edge 24 without any gaps. Therefore, sufficient two-sided sealing is ensured by the two end portions 20 and 21, and upward displacement of the hollow seal portion 15 is prevented, thereby further improving sealing performance. therefore,
The cross-sectional shape of the hollow seal portion 15 can be made as small as possible.

FIG. 4 shows a second embodiment of the present invention, which is a contact portion 1
Rather than forming the bent portion 22 on the corresponding contact portion 18
A notch 30 serving as a bending means is formed on the inner surface of the hollow portion 23 at approximately the center of the hole. Therefore, also in this embodiment, when the door is closed, the contact portion 18 is connected to the notch 30.
Since it is flexibly bent and deformed along the angle of the corner portion C, the same effect as in the first embodiment can be obtained, and since the notch 30 is simply formed, the manufacturing workability is improved. .

In addition, as another example, as shown in FIG. 5, the lower end portion 17 of the hollow seal portion 15 is bent into a substantially ■ shape, and the tip edge 27 is formed on the lower upper surface of the door 12 using the first embodiment as the basic configuration. It was arranged so that it was in contact with 28. Thereby, even if the entire hollow seal portion 15 is flexibly deformed when the door is closed, it is possible to prevent the hollow seal portion 15 from falling downward.

Note that the bending means is not limited to the above embodiments (
For example, it is also possible to obtain flexible bendability by forming the central portion thin.

Effects of the Invention As is clear from the above explanation, according to the weather strip according to the present invention, since a bending means for bending and deforming the hollow seal part inward when the door is closed is provided at the abutting part of the hollow seal part, the hollow seal part A reliable two-sided seal on the edge of the vehicle body opening can be obtained by the opening, and the sealing performance can be greatly improved. Therefore, it is possible to make the cross-sectional shape of the hollow seal part as small as possible, and as a result, interference with other members can be prevented and manufacturing costs can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the main part showing the first embodiment of the present invention, Fig. 2 is a sectional view of the main part showing the action of the present embodiment at the initial stage of door closing, and Fig. 3 is the main part sectional view showing the action of the present embodiment at the final stage of door closing. 4 is a sectional view of essential parts showing a second embodiment of the present invention, FIG. 5 is a sectional view of essential parts showing another example, FIG. 6 is a perspective view of an automobile, and FIG. 7 is a sectional view of essential parts. FIG. 6 is a cross-sectional view taken along the line Vl--Vl showing a conventional weather strip, and FIG. 8 is a cross-sectional view showing the conventional operation. 11... Weather strip, 12... Door, 15
...Hollow seal part, 8...Abutting part, 22...Bending part (bending means) 23...Hollow part, 30...Notch (bending step) Diagram

Claims (1)

[Claims] (1) In a weather strip that is fixed to the peripheral edge of a door and seals by bringing the contact area of the hollow seal part into contact with the corner part of the edge of the vehicle body opening when the door is closed, the contact area of the hollow seal part is attached to the corner part of the opening edge of the vehicle body. A weather strip for an automobile, characterized in that a bending means is provided for bending and deforming the corner abutting portion of the corresponding abutting portion inward of the hollow portion.