JPH0971192A - Weather Strip - Google Patents

Abstract

(57) [Abstract] (Correction) [PROBLEMS] To provide a weather strip capable of maintaining stable sealing property by suppressing deterioration with time due to high water pressure applied by car washing or the like. SOLUTION: In a weather strip composed of a mounting base portion 2 attached to a door opening edge of a vehicle body and a hollow seal portion 3 formed integrally with the mounting base portion 2 and elastically contacting a door glass 10, inside the hollow seal portion 3, A substantially V-shaped cross-section having its forked portions 6 and 7 connected to the hollow seal portion 3 and a base portion 8 of the forked portions 6 and 7 connected to the mounting base 2 integrally forms a bridge of the door glass 10. The elastic contact is located approximately in the center between the forked portions 6 and 7. Further, the bifurcated portions 6 and 7 are curved toward each other inward.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a weather strip. More specifically, the present invention relates to a weather strip that is mounted on a sashless door vehicle and elastically contacts a door glass to seal the inside and outside of the vehicle.

[0002]

2. Description of the Related Art As shown in FIG. 5, a weather strip mounted on a sashless door vehicle includes a mounting base 2 mounted on a retainer 1 at a door opening edge of a vehicle body and a door glass integrally formed on the mounting base 2. 10 and a hollow seal portion 3 elastically contacting the inside of the hollow seal portion 3.
Are integrally formed. One side edge 4a of the bridge 4
Is connected to the sealing surface 3A of the hollow seal portion 3, and the other side edge 4b is connected to the mounting base portion 2.

When the door is closed and the door glass 10 elastically contacts the hollow seal portion 3, as shown in FIG.
Is deformed and pressed against the bridge 4, and the surface pressure (load) of the sealing surface 3A is increased by the reaction force thereof to improve the sealing performance.

[0004]

However, since the peripheral length connecting the base portion 3a serving as the fulcrum of the deflection of the sealing surface 3A and the side edge 4a of the bridge 4 is long, as shown in FIG.
For example, when a high water pressure is applied to the hollow seal portion 3 due to a car wash or the like, the seal surface 3A and the bridge 4 abutting against the seal surface 3A are pressed together by the high water pressure force. As a result, a gap L is formed between the door glass 10 and the sealing surface 3A, so that water leakage may occur even if the surface pressure is high.

Even if water leakage does not occur, the sealing surface 3A and the bridge 4 deteriorate with time as shown by the dotted line in FIG. 5, so that the sealing performance is weakened and eventually water leakage occurs. In particular, as shown in FIG. 8, the door glass 1
The load received by 0 has a large rate of change from before deterioration to after deterioration at the elastic contact reference position. It is considered that this is because, in the shape shown in FIG. 5, the compression load curve of 2 mm before and after the standard compression is sharply increased by the contact between the hollow seal portion 3 and the bridge 4.

[0006] Therefore, an object of the present invention is to have stable sealing property even if high water pressure is applied by, for example, car washing, and to suppress deterioration with time due to closing the door for a long time and maintain stable sealing property. To provide a weatherstrip. Further, in order to obtain a stable compression load curve even after deterioration, it is necessary that the compression load curve of 2 mm before and after the reference compression is relatively flat.

[0007]

In order to achieve the above object, a weather strip of the present invention comprises a mounting base attached to a door opening edge of a vehicle body, and a hollow formed integrally with the mounting base to elastically contact a door glass. In a weather strip composed of a seal portion, a bridge is formed integrally inside the hollow seal portion, the bifurcated portion of which is substantially V-shaped in cross section, is connected to a sealing surface, and the base portion of the bifurcated portion is connected to a mounting base portion. However, the elastic contact of the door glass is located approximately in the center between the two forks (claim 1).

Further, the weather strip of the present invention is a weather strip comprising a mounting base portion attached to a door opening edge of a vehicle body and a hollow seal portion integrally formed with the mounting base portion and elastically contacting a door glass. In addition, the bifurcated portion is connected to the sealing surface with a substantially Y-shaped cross section,
And a leg formed by connecting the leg portion extending from the base of the forked portion to the mounting base portion is integrally formed, and the elastic contact of the door glass is located substantially at the center between the forked portions (claim 2).

Further, in the invention according to claim 1 or 2, the forked portions are formed so as to be curved inwardly toward each other (claim 3).

According to the first aspect of the present invention, the bridge integrally formed inside the hollow seal portion has a substantially V-shaped cross section and its forked portion is connected to the sealing surface. It serves as a fulcrum for the flexure of the hollow seal. By connecting the forked portions, the circumferential length of the flexible portion is shortened, so that the deformation of the seal surface during the elastic contact of the door glass is suppressed to a small level, and the surface pressure of the seal surface is increased. Therefore, even if a high water pressure is applied to the sealing surface, the sealing surface abuts against the bridge and the pressing of the bridge and the sealing surface together is reduced, so there is no gap between the door glass and the sealing surface and there is no water leakage. I don't have to worry.

In particular, the elastic contact position of the door glass is substantially in the center between the forked part and the forked part having a substantially V-shape has substantially the same shape and the same length. Is almost evenly applied to the bifurcated portion, the deformation of the seal surface due to the pressing force is suppressed to a smaller extent, and the contact of the seal surface with the bridge is further reduced.

Instead of the bridge having a substantially V-shaped cross section, a leg portion having a substantially Y-shaped cross section and extending from the root of the forked portion connected to the hollow seal portion is used as the mounting base. By connecting and making the door glass elastically contact with the substantial center between the forked portions, the deformation of the sealing surface can be suppressed to a small level as in the case of the above-described invention of claim 1.

Further, according to the third aspect of the invention, since the forked portions are connected to the hollow seal portion in a state of being curved inward toward each other, a pressing force is applied to substantially the center of the seal surface. And the forked portion transmits a reaction force corresponding to the pushing force from the connection portion to the sealing surface. Thereby, the deformation of the sealing surface is further suppressed. For example, when a high water pressure is applied to substantially the center of the seal surface, the seal surface is further elastically contacted with the door glass by the reaction force from the connecting portion, so that the door glass and the seal surface become denser and no gap is generated.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. The same parts as those in the conventional example are designated by the same reference numerals. FIG. 1 is a weather strip according to an embodiment of the present invention.

This weather strip is mounted on the retainer 1 at the door opening edge of the vehicle body, and the door glass 10 is integrally formed on the mounting base 2 as in the conventional example.
And a hollow seal portion 3 that elastically contacts with. A bridge 5 having a substantially V-shaped cross section is integrally formed inside the hollow seal portion 3. The bifurcated portions 6 and 7 of the bridge 5 are connected to the hollow seal portion 3, and the base portions 8 of the bifurcated portions 6 and 7 are connected to the mounting base portion 2. Forked part 6,7
Since each of them has substantially the same shape and length, connecting the connecting portions 6a, 7a of the forked portions 6, 7 to the hollow seal portion 3 and the root portion 8 results in a substantially isosceles triangular shape. The bifurcated portions 6 and 7 are used for the elastic contact of the door glass 10 with the bifurcated portions 6 and 7.
And the forked portions 6 and 7 are connected to each other while being bent inward.

In the weather strip constructed as described above, when the door is closed and the door glass 10 makes elastic contact with the hollow seal portion 3, as shown in FIG.
However, the sealing surface 3A is supported by the bifurcated portions 6 and 7 so as to shorten the circumference connecting the connecting portions 6a and 7a of the bifurcated portions 6 and 7 which are fulcrums of the flexible portion from the inside of the hollow seal portion 3. Therefore, the deformation can be suppressed to be small. Therefore, the surface pressure of the seal surface 3A becomes strong, and even if high water pressure is applied to the seal surface 3A, the contact of the seal surface 3A with the bridge 5 prevents the bridge 5 from being pushed together with the seal surface 3A. As a result, there is no gap between the door glass 10 and the sealing surface 3A, and there is no concern that water will leak from the gap.

Particularly, the elastic contact position of the door glass 10 is approximately the center between the forked portions 6 and 7, as described above, and since the forked portions 6 and 7 have substantially the same shape and the same length, Since the pressing force due to the contact is evenly applied to the forked portions 6 and 7,
The contact of the seal surface 3A with the bridge 5 by the pressing force is further reduced. Further, since the forked portions 6 and 7 are connected to the hollow seal portion 3 in a state of being curved inward toward each other in advance, when the pressing force is applied to the substantially center of the sealing surface 3A, the forked portions 6 and 7 are The reaction force corresponding to the pushing force is applied to the connecting portions 6a, 7
From a to the sealing surface 3A. As a result, the sealing surface 3
The deformation of A is further suppressed. Therefore, for example, when a high water pressure is applied to the approximate center of the seal surface 3A, the seal surface 3A is further elastically contacted with the door glass 10 by the reaction force from the connecting portions 6a and 7a. There is no gap.

As shown in FIG. 3, the load applied to the door glass 10 at the elastic contact reference position was much smaller than before in the rate of change before and after deterioration with time.

In the embodiment of the present invention, the bridge 5 having a substantially V-shaped cross section is integrally formed inside the hollow seal portion 3, but instead, as shown in FIG. 4, the bridge 15 having a substantially Y-shaped cross section. May be integrally formed inside the hollow seal portion 3. In this bridge 15, its forked portions 16 and 17 are connected to the hollow seal portion 3, and the leg portion 18 extending from the root of the forked portions 16 and 17 is connected to the mounting base portion 2. Note that reference numerals 16a and 17a indicate connecting portions. Similar to the bridge 5, the bifurcated portions 16 and 17 have substantially the same shape and the same length, and the hollow seal portion is arranged so that the elastic contact of the door glass 10 is located substantially in the center between the bifurcated portions 16 and 17. 3, and the forked portions 16 and 17 are connected to each other in a state of being curved inward.

[0020]

As described above, according to the invention described in claim 1 or 2, the bifurcated portion of the bridge integrally formed inside the hollow seal portion has a substantially V-shaped section or a substantially Y-shaped section. By connecting to the seal surface, the circumferential length of the flexible portion becomes short, so that the deformation of the seal surface during the elastic contact of the door glass can be suppressed small, and the surface pressure of the seal surface becomes strong. Therefore, even if a high water pressure is applied to the sealing surface, the sealing surface abuts against the bridge and the pressing of the bridge and the sealing surface together is reduced, so there is no gap between the door glass and the sealing surface and there is no water leakage. I don't have to worry. Since the deformation of the sealing surface is suppressed to be small as described above, it is possible to suppress deterioration with time and secure stable sealing performance.

Particularly, the elastic contact position of the door glass is substantially in the center between the forked part and the forked part having a substantially V-shape or a substantially Y-shape has substantially the same shape and the same length. Since the pressing force due to the contact is evenly applied to the bifurcated portion, the deformation of the sealing surface due to the pressing force is further suppressed, and the contact of the sealing surface with the bridge is further reduced.

According to the third aspect of the present invention, since the bifurcated portions are connected to the hollow seal portion while being curved inward toward each other, the deformation of the sealing surface can be further suppressed. When a high water pressure is applied to substantially the center of the seal surface, the seal surface is further elastically contacted with the door glass by the reaction force from the connecting portion, so that the door glass and the seal surface become denser and no gap is generated.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a weather strip according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state in which a door glass 10 is elastically contacted with a hollow seal portion 3 of the weather strip shown in FIG.

3 is a graph showing changes in surface pressure before and after deterioration with time in the weather strip of FIG.

FIG. 4 is a cross-sectional view showing another weather strip according to the embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a conventional weather strip.

6 is a cross-sectional view showing a state in which a door glass 10 is elastically contacted with the hollow seal portion 3 of the weather strip shown in FIG.

FIG. 7 is a cross-sectional view showing a state where high water pressure is applied to the hollow seal portion 3 of the weather strip shown in FIG.

8 is a graph showing changes in surface pressure before and after deterioration with time in the weather strip of FIG.

[Explanation of symbols]

 1 Retainer 2 Mounting Base 3 Hollow Seal 3A Sealing Surface 4 Bridge 5 Bridge 6,7 Bifurcated Part 6a, 7a Connection 8 Base Root 10 Door Glass 15 Bridge 16, 17 Bifurcated 16a, 17a Connection 18 18 Leg

Claims (3)

[Claims] 1. A weather strip comprising a mounting base portion mounted on a door opening edge of a vehicle body and a hollow seal portion integrally formed on the mounting base portion and elastically contacting a door glass,
Inside the hollow seal portion, a bridge having a substantially V-shaped cross section, whose forked portion is connected to the sealing surface, and the base portion of the forked portion is connected to the attachment base portion is integrally formed, and the bullet of the door glass is formed. A weather strip characterized in that the contact is located approximately in the center between the two forks. 2. A weather strip comprising a mounting base portion mounted on a door opening edge of a vehicle body and a hollow seal portion integrally formed on the mounting base portion and elastically contacting a door glass,
Inside the hollow seal portion, there is integrally formed a bridge having a Y-shaped cross section, the forked portion of which is connected to the sealing surface, and the leg portion extending from the root of the forked portion is connected to the mounting base portion. A weather strip characterized in that the elastic contact of the glass is located approximately in the center between the two forks. 3. The weather strip according to claim 1, wherein the bifurcated portions are formed so as to be curved inward.