JPH01109143A - 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 member for bridging the base end portion and tip end portion of a hollow seal lip bendably toward an automobile outside, in the hollow inside of the hollow seal lip which is brought into contact with a body panel to seal the opening edge of an automobile body. CONSTITUTION:A door weather strip 3 consists of a long and narrow band like hollow base portion 4 which is fixed to the peripheral edge portion 2a of a door 2 by means of an adhesive, etc., a hollow seal lip 5 erected on the automobile-inside end face of the base portion 4, and a falling preventing lip 6 erected on the automobile-outside end face thereof. In this case, in the hollow inside 5a of the hollow seal lip 5, a relatively thin-walled supporting member 13 one end 13a of which is joined to the base end portion 10 and the other end portion 13b of which is joined to the tip end portion 7 is integrally formed with the hollow seal lip 5. This supporting member 13 is formed being bent nearly in a dog-legged shape equally to the shape of an automobile-outside lip portion 12 and, at the time of closing the door 2, the outer edge of a bent portion 14 which is bent nearly at a right angle is brought into contact with the inner face 12a of the automobile-outside lip portion 12.

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 Generally, as shown in FIG. 3, a door weather strip 3 made of sponge rubber is attached around a door 2 of an automobile 1 to seal the door 2 with the opening edge of the vehicle body. As shown in FIG. 4, the door weather strip 3 includes a base 4 fixed to the peripheral edge 2a of the door 2 on the lower end side of the door 2, and a hollow hole integrally erected on the inner side end surface of the base 4. It mainly consists of a seal lip 5 and a fall prevention lip 6 which 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 7a of the substantially perpendicularly bent tip 7 of the hollow seal lip 5 deforms and contacts the outer end surface 8a of the side sill 8 of the vehicle body, thereby sealing the interior and exterior of the vehicle. (Refer to Japanese Patent Application Laid-Open 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 portion 7 and the outer end surface 8a of the side sill 8, and the high pressure water W enters the vehicle interior through this gap C along the path shown by the arrow. There is a trick to infiltrate.

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

Means for Solving the Problems The present invention was devised in view of the problems of the conventional door weather strips described above. a support member is provided to be bendable toward the outside of the vehicle, and the support member supports the tip portion from the outside of the vehicle through the bent portion that comes into contact with the inner surface of the outside lip of the hollow seal lip when the door is closed. It is characterized by what it did.

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, the bent portion of the support member, which had been bent at an approximately obtuse angle, bends toward the exterior of the vehicle at an approximately right angle due to the deformation of this tip toward the exterior of the vehicle, causing the outer lip to bend. It comes into contact with the inner surface of the part. Therefore, the portion of the support member from the bent portion to the tip supports the tip of the hollow seal lip from the outside of the vehicle in a manner similar to a protruding support rod. Therefore, the hollow seal lip tip portion is prevented from deforming toward the outside of the vehicle 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.

EXAMPLE Hereinafter, an example of the present invention will be described in detail based on FIGS. 1 and 2. Incidentally, the same reference numerals are given to the same components as in the prior art in the explanation.

That is, in the figure, 2 is an automobile door, 3 is a door weather strip made of sponge rubber attached around the door 2, and this door weather strip 3 is as follows:
An elongated strip-shaped hollow base 4 fixed to the peripheral edge 2a of the door 2 with an adhesive or a mounting clip, and the base 4
It mainly consists of a hollow seal lip 5 erected on the inner side end surface of the vehicle and a fall prevention IF lip 6 erected on the outer side end surface. The tip portion 6a of the fall prevention lip 6, which is bent toward the outside of the vehicle in a substantially dogleg shape, comes into contact with the lower edge of the door peripheral portion 2a, and the reaction force prevents the hollow seal lip 5 from falling toward the outside of the vehicle. ing.

On the other hand, the hollow seal lip 5 includes an in-vehicle lip portion 11 rising toward the inside of the vehicle from the base end IO, and a base end portion 10.
The outer lip of the car is bent downwards into a dogleg shape! 2
and a distal end portion 7 bent at a substantially right angle at the joint portion of the outer lip portion 12 and the inner lip portion 11. As shown in FIG.
The inner end surfaces 71 on the sides are brought into contact with each other.

In the hollow interior 5 & of the hollow seal lip 5,
A relatively thin support member 13 is formed integrally with the hollow seal lip 5, and has one end 13a connected to the proximal end 10 and the other end 13b connected to the distal end 7. More specifically, as shown in FIG. 1, the support member I3 is bent into a substantially dogleg shape in substantially the same shape as the vehicle outer lip portion 12, and when the door 2 is not closed, that is, the tip portion 7 is bent. When the door 2 is not in contact with the outer end surface 8a of the side sill 8, the outer edge of the bent portion 14, which is bent at a substantially right angle, is placed close to and parallel to the outer lip portion 12, while when the door 2 is closed, the outer edge of the bent portion 14, which is bent at a substantially right angle, touches the outer lip portion 12. It is arranged so as to be in contact with the inner surface 12a of the portion 12.

Therefore, according to this embodiment, when the door 2 is closed, the tip 7 of the hollow seal lip 5 deforms at a substantially right angle while its inner end surface 7a comes into pressure contact with the outer end surface 8a of the side sill 8 in the direction outside the vehicle. Slightly deformed and moved. As a result, the vehicle outer lip portion 12 and the support member 13, which had been bent in a substantially dogleg shape,
are bent into an oval shape, and the outer edge of the bent portion 14 comes into contact with the inner surface 12a of the vehicle outer lip portion 12. Therefore, from the bend ff114 of the support member 13 to the tip (other end) 1
3b supports the tip 7 of the hollow seal lip 5 from the outside of the vehicle in a manner similar to a support rod. Therefore, the tip portion 7 comes into contact with the outer end surface 8a of the side sill 8 with an appropriate elastic force, and easy deformation toward the outside of the vehicle is restricted. As a result, even if strong pressure water such as car wash water is applied to the tip 7 from outside the vehicle, it is prevented from floating toward the outside of the vehicle.
The generation of a gap between the tip inner end surface 7a and the side sill outer end surface 8a is reliably prevented.

Further, when the door 2 is closed, the support member 13 is bent and deformed as described above, and the generation of an excessive reaction force against the hollow seal lip 5 is suppressed, so that good door closing performance can be ensured.

Effects of the Invention As is clear from the above description, according to the automobile door weather strip according to the present invention, the base end and the distal end of the hollow seal lip are bridged, especially in the hollow interior of the hollow seal lip. The support member is provided so as to be bendable toward the outside of the vehicle,
Since the support member is formed to support the tip from the outside of the vehicle via the bent portion that comes into contact with the inner surface of the outer lip of the hollow seal lip when the door is closed, the tip of the hollow seal lip when the door is closed is can be pressed against the vehicle body panel with appropriate elastic force.

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.

In addition, the flexibility of the support member can suppress an excessive increase in reaction force of the hollow seal lip, so 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 sectional view of a main part showing an embodiment of a door weather strip for an automobile according to the present invention, and FIG. 2 is a sectional view of a main part showing a state in which the door weather strip of this embodiment is in contact with a vehicle body panel. 3 is a side view of the automobile, and FIG. 4 is a sectional view taken along line I-1 in FIG. 3, showing a conventional weather strip. 2... Door, 2a... Periphery, 3... Door weather strip, 4... Base, 5... Hollow seal lip, 5a... Hollow interior, 7... Tip, 8 ...Side sill (body hole flannel), IO... base end, 12...
- Vehicle outer lip portion, 12a...Inner surface, 13...Supporting member, 14...Bending portion. 2 people outside

Claims (1)

[Claims] (1) A door that includes a base that is fixed to the peripheral edge of the door, and a hollow seal lip that is integrally provided with the base and whose tip comes into contact with the vehicle body panel to seal the vehicle body opening edge when the door is closed. In the weather strip, a support member is provided in the hollow interior of the hollow seal lip so as to be bendable toward the outside of the vehicle, bridging the proximal end and the distal end of the hollow seal lip, and when the door is closed, the support member A door weather strip for an automobile, characterized in that the tip portion is supported via the bent portion that abuts the inner surface of the outer lip portion of the hollow seal lip.