JPH07329571A - Automotive door weather strip - Google Patents

Abstract

(57) [Abstract] [Purpose] It is possible to prevent fatigue due to bending of the hollow seal part and breakage due to biting, and also to prevent strong pressure between the hollow seal part and the relief surface of the vehicle body, so that the hollow seal part and the vehicle body come into contact with each other. (EN) Provided is a door weather strip for an automobile, which can increase a sealing width with respect to a surface. [Structure] A door weather strip 11 includes a base portion 12 attached to a door sash 1 and a vehicle body 2 when the door is closed.
A hollow seal portion 13 that enters along the relief surface 4 and contacts the contact surface 5 of the vehicle body 2, and a cover lip 14,
These parts are integrally extruded from rubber. A thick portion 15 is provided in a portion of the hollow seal portion 13 that faces the contact surface 5, and a notch 16 is formed in a portion of the hollow seal portion 13 that is closer to the contact surface than the escape surface 4. .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle door weather strip which is attached to a vehicle door sash and seals a door opening of a vehicle body when the door is closed.

[0002]

2. Description of the Related Art As shown in FIGS. 4 and 5, a conventional vehicle door weather strip 21 has a base 22 attached to the upper edge of a door sash 1 and a tubular shape, and the thickness of each portion is substantially uniform. It is composed of a hollow seal portion 23 and a cover lip portion 24 having a tongue-shaped cross section, and these portions are integrally extruded from rubber. On the other hand, the door opening portion of the vehicle body 2 has an outer surface 3 against which the cover lip portion 24 abuts when the door is closed, a clearance surface 4 along which the hollow seal portion 23 enters when the door is closed, and a hollow surface when the door is closed. The contact surface 5 with which the seal portion 23 abuts.

FIG. 4 shows the state of the door weather strip 21 from the time the door is opened to the time immediately before the door is closed, and the hollow seal portion 23 is slightly inclined toward the vehicle body 2. FIG. 5 shows the state of the door weather strip 21 when the door is closed. Originally, as indicated by the chain double-dashed line, the hollow seal portion 23 escapes the contact surface 5 when it comes into contact with the contact surface 5. It slides to the side of the surface 4 and leans to the side opposite to the vehicle body.

[0004]

However, when the door is actually closed, the part of the hollow seal portion 23 that first contacts the contact surface 5 may adhere to the contact surface 5 due to friction and may not slip. . In that case, the hollow seal portion 23 is not tilted to the opposite side of the vehicle body, but is pushed down as the door is closed and is bent in two as shown by the solid line in FIG. When this bending is repeated, the hollow seal portion 2
The bent portion of 3 is easily set. In particular, when the gap 7 between the door sash 1 and the corner portion 6 of the edge of the contact surface 5 is narrow (particularly when the gap is less than twice the wall thickness of the hollow seal portion 23),
The bent portions of the hollow seal portion 23 are the door sash 1 and the corner portion 6.
As it is caught between and, it causes breakage.

The object of the present invention is to solve the above-mentioned problems, prevent the hollow seal portion from being sagged due to bending and breaking due to biting, and also prevent the strong pressure between the hollow seal portion and the relief surface of the vehicle body, thus making it possible to prevent the hollow seal. An object of the present invention is to provide a door weather strip for an automobile, which can increase a seal width between a portion and a contact surface of a vehicle body.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a base portion attached to a door sash of an automobile and a vehicle body that abuts against the vehicle body when the door is closed along the escape surface of the vehicle body. In a vehicle door weather strip having a hollow seal portion that abuts against a surface, a thick portion is provided at a portion of the hollow seal portion that faces the abutting surface of the vehicle body, and the hollow seal portion has a relief surface of the vehicle body. Is characterized in that a notch is formed in a portion on the side opposite to the contact surface with respect to the portion closest to.

Here, the thickness of the "thick portion" is appropriately 1.2 to 2.2 times the thickness of the other portion of the hollow seal portion, and is 1.5.
˜2.0 times is more preferable, and 1.7 to 1.9 times is optimal. If it is less than 1.2 times, the rigidity of the thick portion is too small to reduce the bending prevention effect, and if it exceeds 2.2 times, the rigidity of the thick portion is too large and the sealing property is deteriorated. Is. For example, the wall thickness of other parts of the hollow seal is 1.5 mm
If so, the thickness of the thick portion is appropriately 1.8 to 3.3 mm, more preferably 2.25 to 3.0 mm, and 2.55.
The optimum value is 2.85 mm.

The "notch" can be formed either inside or outside the hollow seal portion, but it is desirable to form the notch on the inside which cannot be seen from the outside in consideration of design.
The depth of the "notch" is suitably 0.16 to 0.50 times the wall thickness of the hollow seal portion forming the notch, and 0.23 to 0.
44 times is more preferable, and 0.30 to 0.37 times is optimum. This is because if it is less than 0.16 times, the effect of the notch is reduced, and if it exceeds 0.50 times, the strength of the hollow seal portion is weakened. For example, if the hollow seal portion forming the notch has a wall thickness of 1.5 mm, it is 0.25 to 0.75.
mm is suitable, 0.35-0.65 mm is more preferable, and 0.45-0.55 mm is optimum.

[0009]

According to the door weather strip of the present invention, when the door is closed, the thick-walled portion of the hollow seal portion facing the contact surface enhances the rigidity of the hollow seal portion. To prevent bending. Therefore, the hollow seal portion slides toward the relief surface side of the contact surface and tilts toward the opposite side of the vehicle body. Therefore, it is possible to prevent the hollow seal portion from being bent due to bending. Further, even if the gap between the door sash and the vehicle body is narrow, the hollow seal portion is not caught in the gap, so that the hollow seal portion can be prevented from breaking.

Moreover, since the notch is formed in the hollow seal portion on the side opposite to the contact surface from the portion closest to the escape surface, the portion on the side opposite the contact surface of the hollow seal portion is notched when the door is closed. The part bends outward and the height decreases. Therefore, there is no possibility that the top of the hollow seal portion will be strongly pressed against the relief surface, and the door opening / closing force can be prevented from becoming excessive. In addition, the seal width between the hollow seal portion and the contact surface increases due to the reaction caused by the outward bending of the portion of the hollow seal portion on the opposite contact surface side.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a door weather strip embodying the present invention will be described below with reference to FIGS. The door opening of the vehicle body 2 is the same as that described above, and is provided with the outer surface 3, the relief surface 4, and the contact surface 5. The door weather strip 11 according to the present embodiment includes a base portion 12 attached to the upper edge of the door sash 1 and a tubular hollow seal portion that enters along the relief surface 4 and comes into contact with the contact surface 5 when the door is closed. 13 and a cover lip portion 14 having a tongue-shaped cross section that comes into contact with the outer surface 3 when the door is closed, and these portions are integrally extruded from a rubber material (for example, EPDM rubber).

A thick portion 15 is provided at a portion of the hollow seal portion 13 facing the contact surface 5. In this embodiment, the wall thickness of the thick wall portion 15 is set to 2.7 mm, and the wall thickness of other portions of the hollow seal portion 13 is set to 1.5 mm. Further, a notch 16 is formed in a portion of the hollow seal portion 13 on the side opposite to the contact surface with respect to the portion closest to the relief surface 4 (a range shown by an arrow in FIG. 2 is preferable). In this embodiment,
The notch 16 is formed on the inner surface of the hollow seal portion 13 with a depth of about 0.5 mm.

FIG. 1 shows the state of the door weather strip 11 from the time the door is opened to the time immediately before it is closed. The hollow seal portion 13 is slightly inclined toward the vehicle body 2. Also in the door weather strip 11 of this embodiment, when the door is closed, the portion of the hollow seal portion 13 that first comes into contact with the contact surface 5 tends to adhere to the contact surface 5 due to friction, and the door is closed. There is a case where a pressing force is applied to the hollow seal portion 13 with the progress of.

However, even in such a case, according to the door weather strip 11 of this embodiment, the hollow seal portion 13 is formed.
Of the thick portion 15 provided at a portion of the portion facing the contact surface 5
However, the rigidity of the same portion is increased and the foot is struck against the pushing-down force to prevent the hollow seal portion 13 from bending. For this reason,
As shown in FIG. 3, the hollow seal portion 13 does not adhere to the contact surface 5, but slides toward the escape surface 4 side of the contact surface 5 and leans toward the opposite side of the vehicle body. Therefore, it is possible to prevent the hollow seal portion 13 from being bent due to bending. Further, even if the gap 7 between the door sash 1 and the corner portion 6 is narrow, the hollow seal portion 13 will not be caught between them, so that the breakage of the hollow seal portion 13 can be prevented.

By the way, as described above, the thick wall portion 15 enhances the rigidity of the hollow seal portion 13 so that the hollow seal portion 13 slides toward the relief surface 4 side.
There is a possibility that the top of the hollow seal portion 13 is strongly pressed against the relief surface 4 and the door opening / closing force becomes excessive.

However, according to the door weather strip 11 of this embodiment, since the notch 16 is formed in the portion of the hollow seal portion 13 that is closer to the relief surface 4 and on the side opposite to the contact surface, the door weather strip 11 is formed. At the time of closing, the portion of the hollow seal portion 13 on the side opposite to the contact surface bends so as to bulge outward at the notch 16 portion, and the height decreases. Therefore, there is no possibility that the top of the hollow seal portion 13 will be strongly pressed against the relief surface 4, and the door opening / closing force can be prevented from becoming excessive. Also, the seal width between the hollow seal portion 13 and the contact surface 5 increases due to the reaction due to the portion of the hollow seal portion 13 on the opposite contact surface side being bent outward.

The reason why it is preferable to form the notch 16 in the range shown by the arrow in FIG. 2 is that if the notch is provided in the part on the contact surface side of the same range, the notch action disappears, and the part on the base side of the range. This is because, if a notch is provided in the hollow seal portion 13, the portion of the hollow seal portion 13 on the side opposite to the contact surface is bent inward at the notch portion, and the seal width between the hollow seal portion 13 and the contact surface 5 is reduced.

The present invention is not limited to the above-mentioned embodiment, and for example, the width of the thick wall portion can be adjusted, the notch forming portion can be changed within the above angle range, or the notch can be a hollow seal portion. It is also possible to embody the present invention by appropriately changing the shape and configuration of each part within a range not departing from the spirit of the present invention, such as being formed on the outer surface of.

[0019]

As described in detail above, according to the automotive door weather strip of the present invention, it is possible to prevent the hollow seal portion from being sagged due to bending and from being broken due to biting, thereby allowing the hollow seal portion and the vehicle body to escape. It is possible to prevent a strong pressure against the surface, and it is possible to increase the sealing width between the hollow seal portion and the contact surface of the vehicle body, which is an excellent effect.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state of a door weather strip according to an embodiment of the present invention from a door opening to a door just before closing.

FIG. 2 is a sectional view taken along the line II-II in FIG. 3, showing a state of the weather strip when the door is closed.

FIG. 3 is a side view of an automobile.

FIG. 4 is a cross-sectional view showing a state of a conventional door weatherstrip from opening the door to immediately before closing the door.

FIG. 5 is a cross-sectional view showing a state of the weather strip when the door is closed.

[Explanation of symbols]

 1 Door Sash 2 Vehicle Body 4 Relief Surface 5 Contact Surface 11 Door Weather Strip 12 Base 13 Hollow Seal 15 Thick Wall 16 Notch

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masayasu Okada No. 1 Nagahata, Ochiai, Kasuga-cho, Nishikasugai-gun, Aichi Prefecture (72) Inventor Takeo Suga 5-33-8, Shiba, Minato-ku, Tokyo Mitsubishi Automobile Industry Co., Ltd. (72) Inventor Hayami Nakagawa, Minato-ku, Tokyo 5-33-8, Mitsubishi Motors Industry Co., Ltd.

Claims (1)

[Claims] 1. A door weather strip for an automobile, comprising: a base portion attached to a door sash of an automobile; and a hollow seal portion that enters along an escape surface of the vehicle body and abuts an abutting surface of the vehicle body when the door is closed. In the hollow seal portion, a thick portion is provided in a portion facing the contact surface of the vehicle body, and a notch is formed in a portion of the hollow seal portion that is closer to the contact surface than the escape surface of the vehicle body. An automotive door weather strip characterized in that