JPH01109145A - Door weather strip for automobile - Google Patents

Abstract

PURPOSE:To improve the watertightness between the inside and outside of an automobile by providing a supporting lip the free end portion of which is bent in an automobile outside direction, on the outside end portion of the base portion fixed to a door peripheral edge portion of a weather strip and making this supporting lip support the tip end portion of a hollow seal lip at the time of closing a door. CONSTITUTION:A door weather strip 11 consists of a long and narrow band like hollow base portion 13 which is fixed to the peripheral edge portion 12a of a door 12 by means of an adhesive, etc., a hollow seal lip 14 erected on the automobile-inside end face of the base portion 13, and a supporting lip 15 erected on the automobile-outside end face thereof. In this case, the supporting lip 15 is extended nearly in parallel to an automobile-outside lip portion 17 at a certain interval and bent toward an automobile outer direction nearly at a right angle, nearly in the center place thereof, i.e., the place opposite to the sending portion 17a of the automobile-outside lip portion 17. The end edge 21a of the free end portion 21 extending from this bent portion 20 is brought into contact with the end face 12b of a door peripheral edge portion 12a which is formed being bent nearly in an L-shape.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to improvements in door weather strips for automobiles.

2. Description of the Related Art In general, as shown in FIG. 4, a door weather strip 3 made of sponge rubber is attached to the circumferential surface of a door 2 of an automobile 1 for sealing the opening edge of the vehicle body. As shown in FIG. 5, the door weather strip 3 includes a base 4 fixed to the peripheral edge of the door 2 at the lower end of the door 2, and a hollow seal integrally erected on the inner side end surface of the base 4. It mainly consists of a lip 5 and a fall-prevention lip 6 that is erected on the outer side end surface of the base 4 and prevents the hollow seal lip 5 from falling towards the outer side of the car. When the door 2 is closed, the inner end surface 7 of the substantially perpendicularly bent tip 7 of the hollow seal lip 5 deforms and firmly contacts the outer end 8a of the side sill 8 of the vehicle body, thereby sealing the interior and exterior of the vehicle. (See Japanese Unexamined Patent Publication No. 61-226324, etc.).

Problems to be Solved by the Invention However, in the conventional automobile door weather strip 3 described above, the hollow sealing lip 5 is generally formed to be relatively flexible. Therefore, when strong pressure water W, such as car wash water, is injected into the space 9 between the door 2 and the side sill 8 with the door 2 closed, this strong pressure water W collides with the outer end surface 8a of the side sill 8. Due to the pressure, the tip 7 of the hollow seal lip 5 is deformed so as to float toward the outside of the vehicle, as shown by the two-dot chain line. Therefore, a minute gap C may be formed between the inner end surface 7a of the tip 7 and the outer end 8a of the side sill 8, and the highly pressurized water W passes through this gap C along the path shown by the arrow A to enter the vehicle interior. There are problems such as intrusion into

Therefore, in order to prevent such easy deformation of the tip 7, it is possible to increase the reaction force by increasing the wall thickness of the hollow seal lip 5, but in this case, the reaction force when the door 2 is closed is This introduces a problem in that a large force is required especially for the closing operation of the door 2, and so-called door closing performance deteriorates.

Means for Solving the Problems The present invention has been devised in view of the above-mentioned problems of the conventional door weather strip.
An elastically deformable support lip is provided substantially along the outer surface of the hollow seal lip, and the free end of the support lip is bent toward the outside of the vehicle to abut against the end surface of the door peripheral edge, and when the door is closed, It is characterized in that the free end portion supports the tip portion of the hollow seal lip by bringing the bent portion of the support lip into contact with the outer surface of the hollow seal lip.

According to the present invention having the above configuration, when the door is closed,
When the tip of the hollow seal lip presses against the vehicle body panel and deforms and moves by a predetermined amount toward the outside of the vehicle, the outer surface of the hollow seal lip comes into contact with the bent portion of the support lip. Therefore, the tip of the support lip from the free end bend to the tip edge that abuts the door periphery supports the tip of the hollow seal lip from the outside of the vehicle in a manner similar to a support rod. . Therefore, the hollow lip tip portion is prevented from further deformation and movement, and comes into contact with the vehicle body panel with an appropriate elastic force. As a result, the tip of the hollow seal lip is prevented from floating toward the outside of the vehicle due to highly pressurized water from outside the vehicle.

Furthermore, if the hollow seal lip is excessively deformed and moved toward the outside of the vehicle when the door is closed due to molding errors in the door weather strip, the tip of the support lip will be elastically deformed to compensate for the movement of the hollow seal lip. Absorb. Therefore, an excessive increase in the reaction force of the hollow seal lip against the vehicle body panel can be suppressed.

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

1 to 3 show an embodiment of the present invention, in which a door weather strip 11 integrally formed of sponge rubber has a hollow base fixed to a peripheral edge 12a of a door 12 with an adhesive or a mounting clip. 13, and a hollow seal lip 14 that stands integrally at the inner side end of the base I3.
and a support lip 15 erected on the outer side end of the base 13.
It is mainly composed of.

The hollow seal lip 14 includes an inboard lip portion I6 rising from the base 13 toward the inside of the car, an outboard lip 17 bent in a substantially dogleg shape from the base 13 toward the inside of the car, and the inboard outside lip portion 16.17. The tip portion 18 is bent into an approximately angular shape at the joint portion. As shown in FIG. 2, this tip portion 18 is a side sill that serves as a vehicle body panel when the door 2 is closed. The inner side lip portion 16 is attached to the outer end surface 19a of 9.
The inner end surface 18a on the side is brought into contact with the inner end surface 18a.

On the other hand, as shown in FIG. 1, the support lip I5 extends substantially parallel to the vehicle outer lip portion 17 at a predetermined distance, and is located approximately at the center thereof, that is, the vehicle outer lip portion 17.
The portion facing the bent portion 17a is bent toward the outside of the vehicle at an angle close to a right angle, and the edge 21a of the tip portion 21, which is a free end extending from the bent portion 20, is shaped like an abbreviated letter. End surface 1 of the door circumference & 1 part 12a formed by bending
2b. A space 22 is formed between the door peripheral edge end surface 12b and the outer surface of the support lip 15 to allow elastic deformation of the support lip 15 toward the outside of the vehicle.

Therefore, according to this embodiment, when the door 12 is closed, the tip 18 of the hollow seal lip 14 has its inner end surface 18a aligned with the outer end surface of the side sill 19, as shown in FIG.
When the support lip 15 is pressed against the support lip 9a and slightly deformed and moved toward the outside of the vehicle, the bent portion 17a of the outside lip ff117, which had been bent into a substantially doglegged shape, also bends into an acute angle and moves toward the outside of the vehicle. The outer edge of the bent portion 20 contacts the outer edge of the bent portion 20. Therefore, the tip 2I of the support lip I5 supports the tip 18 of the hollow seal lip 14 from the outside of the vehicle in a substantially vertical direction via the outer lip 17. Therefore, in the tip portion 18, the inner end surface 18a has a moderate elastic force and the outer end surface 19a of the side sill +9.
This prevents easy deformation toward the outside of the vehicle. As a result, even if strong pressure water such as car wash water is applied to the tip 18 from outside the vehicle, it is prevented from floating toward the outside of the vehicle, and the generation of a gap between the hollow seal lip 14 and the side sill 19 is reliably prevented.

Moreover, due to errors in the molding of the door weather strip 11 and errors in its attachment to the door 12, when the door 12 is closed, the hollow seal lip 14 may be bent as shown in FIG.
If the support lip I5 is excessively deformed and moved toward the outside of the vehicle,
The distal end portion 21 is crushed and deformed in the space y522 to absorb the deformation movement of the hollow seal lip 14. Therefore, an excessive increase in the reaction force of the hollow seal lip 14 against the side sill 19 is suppressed. Therefore, good closing performance of the door 12 can be obtained.

Incidentally, the support lip I5 can, of course, prevent the entire hollow seal lip I4 from falling toward the outside of the vehicle when the door weather strip 11 is attached to the door 12, similarly to the conventional fall prevention lip 6. .

Effects of the Invention As is clear from the above description, the automobile door weather strip according to the present invention particularly includes an elastically deformable support lip at the outer end of the base, extending approximately along the outer surface of the hollow seal lip. At the same time, the free end of the support lip is bent toward the outside of the vehicle and placed in contact with the end surface of the door peripheral edge, and when the door is closed, the free end contacts the bent part of the support lip and the hollow seal lip. Since the tip of the hollow seal lip is supported by making contact with the outer surface, the tip of the hollow seal lip can be brought into pressure contact with the vehicle body panel with appropriate elastic force when the door is closed. As a result, watertightness inside and outside the vehicle can be reliably maintained, and water intrusion into the interior of the vehicle caused by strongly pressurized water such as car wash water can be sufficiently prevented.

Furthermore, the elastic deformation of the support lip can suppress an excessive increase in reaction force of the hollow seal lip, so that a large force is not required especially when closing the door, and good door closing performance can be ensured.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a main part showing an embodiment of the door weather strip for an automobile according to the present invention, FIG. 2 is a cross-sectional view of a main part showing a state in which this door weather strip is in contact with a vehicle body panel, and FIG. is a sectional view of a main part showing the function of this embodiment,
Figure 4 is a side view of a car, Figure 5 is a conventional door weather
FIG. 5 is a sectional view taken along the line II in FIG. 4 showing the strip; 11...Door weather strip, I2...Door,
12a... Peripheral portion, 12b... End face, 13... Base, 14... Hollow seal lip, 15... Support lip, 18... Tip, 19... Side sill (vehicle body panel) , 20... Bent part, 21... Tip part (free end part). 2 other people 11--Door away ghost sofa 12--
-----Door 12a------Ichishuenbang 12b------Ichirichomyo 13------Ilkige 14------Ichichujin2)Reso・〕・〕 P15--
------Female insertion I lip 8----------Temporary Ip 19-------B4 doll 20-------. 1 King's Wholesale 21 ---------

Claims (1)

[Claims] (1) A base fixed to the peripheral edge of the door, and a hollow seal lip provided at the inner end of the base, the tip of which comes into contact with the vehicle body panel to seal the vehicle body opening edge when the door is closed. In the door weather strip, an elastically deformable support lip is provided at the outer end of the base portion along the outer surface of the hollow seal lip, and the free end of the support lip is bent toward the outside of the vehicle. The free end is disposed in contact with the end face of the door peripheral edge, and when the door is closed, the free end comes into contact with the bent part of the support lip and the outer surface of the hollow seal lip to support the tip of the hollow seal lip. Automotive door weather strip featuring: