JPH0561132B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION This invention relates to a weather strip that is attached around the door of a motor vehicle.

BACKGROUND TECHNOLOGY For example, as shown in FIGS. 4 and 5, a weather strip 3 made of sponge rubber is attached around a door 2 of an automobile 1 to seal between the door 2 and the opening edge of the vehicle body. . This weather strip 3 has a clip attachment hole 4 in the internal longitudinal direction as shown in FIG. It is composed of a sash-side lip 6 and a hollow seal lip 7 that protrude in a letter-like shape, and an anchor lip 8 that protrudes from the side surface of the base 5 and is held by the sash (for example, the
(See Publication No. 41851, etc.)

Problems to be Solved by the Invention However, in the conventional automobile weather strip 3, the base portion 5 at the corner portion 2a of the door 2 is
In order to bend the base portion 5 along the corner portion 2a,
With the warpage, the distal ends of the sash-side lip 6 and the hollow seal lip 7 fall in the direction of expansion (in the direction of the arrow) as shown in FIG. In particular, since the hollow seal lip 7 is largely tilted in the direction of the arrow A, there is a problem in that the sealing performance is deteriorated and water, dust, etc. can easily enter the interior of the vehicle.

Therefore, in order to solve this problem, some measures have been taken, such as gluing a rubber spacer 9 to the bending part of the weather strip 3 to prevent the hollow seal lip 7 from falling down, as shown in Fig. 7. However, this method has the disadvantage that not only the appearance quality deteriorates but also the cost increases.

Means for Solving the Problems The present invention has been devised in view of the above-mentioned conventional problems, and includes a base fixed to the circumferential surface of the door, and a base fixed to the peripheral surface of the door, and a base that is erected on one side edge of the base and is attached to the door. a door side lip that comes into contact with the door end surface that is substantially perpendicular to the circumferential surface; and a door side lip that is erected on one side of the door side lip in an inclined manner toward the inside of the vehicle,
A support part whose tip protrudes inwardly of the vehicle, and a support part that bridges between the tip edge of the support part and the other side edge of the base, and the approximately central part extends in the door side lip direction through the inner hollow part. A bridge that can be bent freely; and a hollow seal lip that has one end connected to the vicinity of the base of the bridge and the other end connected to the approximate center of the bridge, and whose tip abuts against the vehicle body panel when the door is closed. It is characterized by the fact that it is equipped with

Effects According to this invention having the above configuration, when the weather strip is bent into a curved shape along the door corner part, a tensile force is applied to the seal lip at the part corresponding to the corner part in the direction of the base, and other parts Since the end part is curved inward at the approximate center of the bridge and is supported in contact with the inner surface of the door side lip through the hollow part,
A tensile force acts on the seal lip in the opposite direction to that of a conventional weather strip, that is, in the rising direction. Therefore, the deterioration in sealing performance due to the collapse that occurs in the prior art is prevented. Furthermore, when the door is closed, when the hollow seal lip tries to deform as a whole in the direction of the door lip due to the reaction force of being pressed against the vehicle body panel, the other side of the hollow seal lip is simultaneously supported by contact with the protruding tip of the support part. ,
Further deformation is regulated. Therefore, the reaction force causes the tip of the hollow seal lip to come into strong pressure contact with the vehicle body panel, providing good sealing performance.

Embodiments Hereinafter, embodiments of this invention will be described in detail based on the drawings. FIG. 1 shows a first embodiment of this invention.
In the figure, reference numeral 11 denotes a weather strip that is disposed around the door 2 and is integrally molded entirely from sponge rubber. An elongated band-shaped base 12 fixed by a clip, and a step-shaped outer end surface that is integrally erected substantially perpendicularly to one side edge 12a of the base 12 and that is perpendicular to the peripheral surface 2b of the door 2. a door side lip 13 that is in contact with the door lip 14a;
A support part 15 is provided in an inclined manner from one side part 13a of the door side lip 13 toward the interior of the vehicle, and has a substantially V-shaped tip 16 protruding toward the interior of the vehicle, and an end of the tip 16 of the support part 15. a bridge 17 bridging between the edge and the other side edge 12b of the base 12;
A hollow seal lip 18 is provided integrally on the inside of the vehicle. The bridge 17 is formed such that a central portion 17a is curved and bulged toward a hollow portion 20, which will be described later, so that it can be bent and deformed. Additionally, a base 12 is provided on the outside of the bridge 17.
A substantially sock-shaped hollow portion 20 is formed surrounded by the door side lip 13 and the support portion 15. This hollow portion 20 has a substantially circular cross section that allows free bending of the support portion 15 and the tip portion 16 at the joint portion between the support portion 15 and the door side lip 13 and inside the tip portion 16 of the support portion 15. It has deep grooves 21 and 22. Further, the seal lip 18 has one end 18a that is connected to the other side edge 1 of the base 12 of the bridge 17.
2b, and the other end 18b is connected to the substantially central portion 17a of the bridge 17,
Inside the joint portion of the one end portion 18a, the one end portion 18
Deep groove 2 with a substantially elliptical cross section that allows free bending of a
It has 3.

Therefore, according to this embodiment, when the weather strip 11 is bent into a curved shape along the corner portion 2a of the door 2, the seal lip is bent at this bent portion by the bending reaction force of the base portion 12. 18
A tensile force acts in the side direction of the base 12, and the base end 18b is absorbed into the hollow part 20 by causing the central part 17a of the bridge 17 to undergo inward curving deformation, as shown by the dashed line in FIG. Inner surface 14 of door side lip 13
b, and one end portion 18a is bent in the rising direction on the left side in the figure via the deep groove 23. For this reason, the tip 19 of the seal lip 18
moves away from the base 12, that is, in the pulling direction (arrow B direction). Therefore, deterioration in sealing performance due to the seal lip falling inward toward the interior of the vehicle, as in the prior art, is prevented.

Furthermore, when the door 2 is closed, the weather strip 11 is attached not only along the corner portion 2a of the door 2, but also along the straight portion, as shown in FIG. The part is also one side 19a of the tip 19 of the seal lip 18.
comes into contact with the vehicle body opening end surface 1a, which is the end surface of the vehicle body panel, and the entire body is pressed toward the door side lip 13, so that the other end portion 18b is pressed against the bridge 1 as described above.
7 The inner surface 14b of the door side lip 13 passes through the hollow portion 20 by the inwardly curved deformation of the central portion 17a.
It is supported in contact with. Meanwhile, at the same time, seal lip 1
The other end surface 18c of the support portion 15 is abutted against and supported by the protruding tip portion 16 of the support portion 15. Therefore, the seal lip 18 is prevented from falling further in the direction of the door side lip 13 by the support part 15, and one side 19a of the tip 19 is pushed against the vehicle body opening end surface 1a by the reaction force. Make strong contact. As a result, door 2
The sealing performance between the periphery and the opening edge of the vehicle body is further improved in conjunction with the above-mentioned effect of preventing the seal lip 18 from collapsing, so that even if strong car wash water enters the space between the periphery of the door 2 and the opening edge of the vehicle body, the seal lip 18 will remain intact. There is no need to worry about it warping, and it can be sealed reliably.

Moreover, when closing door 2, the seal lip 1
8 obtains the inward bending deformation of the bridge center portion 17a as described above and moves relatively flexibly toward the door side lip 13, resulting in extremely good door closing performance.

FIG. 3 shows a second embodiment of the invention, in which the base 1
2, the door side lip 13, the support part 15, etc. are the same as the first embodiment, but the difference is that there is a thin wall between the center part 17a of the bridge 17 and the inner surface 14b of the door side lip 13. This is where the beam member 31 is installed. Therefore, the rigidity of the central portion 17a of the bridge 17 is slightly improved, and simple bending deformation of the central portion 17a of the bridge 17 at the door 2 corner portion is suppressed. As a result, excessive bending deformation of the seal lip 18 in the door side lip 13 direction at the corner portion of the door 2 is suppressed, and substantially the original posture can be maintained. Note that other effects are the same as in the first embodiment.

Effects of the Invention As is clear from the above explanation, in the weather strip for an automobile according to the present invention, when the weather strip is attached along the corner portion of the door circumference, the center portion of the bridge is formed into a hollow portion. Since the hollow seal lip is bent in a curved manner toward the door side lip through the seal, the hollow seal lip deforms not toward the inside of the vehicle but toward the rising direction.
Therefore, deterioration in sealing performance can be reliably prevented.

Moreover, when the door is closed, the center part of the bridge further bends and deforms and hits the inner surface of the door-side lip, and at the same time, the other side surface of the hollow seal lip on the tip side comes into contact with the tip of the support part and is supported. , further deformation is regulated. Therefore, due to the reaction force, the tip of the hollow seal lip is pressed against the end surface of the vehicle body panel with an appropriate force.

As a result, the sealing performance of the seal lip is further improved, along with the effect of preventing it from falling in the direction of the inside of the car.
Even if strong car wash water or the like enters the space between the door periphery and the vehicle body opening edge, the hollow seal lip reliably blocks the car wash water from entering the interior of the vehicle.

Further, since it is not necessary to adhesively fix the spacer as in the conventional case, deterioration in appearance quality and increase in cost can be prevented.

Furthermore, the seal lip is absorbed and moved in the direction of the lip on the door side by the curved deformation of the central portion of the bridge, resulting in extremely good door closing performance.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a first embodiment of the weather strip for an automobile according to the present invention, FIG. 2 is a sectional view showing the action of the weather strip of this embodiment when the door is closed, and FIG. The figure is a sectional view showing the second embodiment of the invention, Figure 4 is a side view of the automobile, Figure 5 is a diagram showing the mounting position of the door to the weather strip, and Figure 6 is a conventional weather strip. FIG. 7 is a perspective view of a main part of another conventional example. 1...Automobile, 1a...Car body opening end surface, 2...
Door, 2a...corner part, 2b...periphery, 2c...
...End face, 11... Weather strip, 12...
Base, 12a... One side edge, 12b... Other side edge, 1
3...Door side lip, 13a...One side part, 14b
...Inner surface, 15... Support part, 16... Tip part,
17... Bridge, 17a... Central part, 18...
Seal lip, 18a...one end, 18b...other end, 20...hollow part.

Claims (1)

[Claims] 1. A base fixed to the circumferential surface of the door, a door-side lip erected on one side edge of the base and in contact with an end surface substantially perpendicular to the door circumferential surface, and a door-side lip on one side of the door-side lip. A support part that is erected in an inclined manner toward the inside of the car, and whose tip end protrudes toward the inside of the car, and a support part that bridges between the tip edge of the support part and the other side edge of the base, so that the substantially central part is on the inside. A bridge that can be freely bent in the direction of the lip on the door side through a hollow part, one end of which is connected to the vicinity of the base of the bridge, the other end of which is connected to approximately the center of the bridge, and the tip of which is bent when the door is closed. A weather strip for an automobile, characterized by comprising a hollow seal lip that comes into contact with a vehicle body panel.