JPH10932A - Weatherstrip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve sealing capability rather than lower sealing capability even though the pressure on the outside of a body becomes negative during travel. SOLUTION: A weatherstrip is provided with a seal part 24 coming in contact with a body opening edge part 6 at the time of an automobile door being closed, and a fitting base part 23 rigidly fixed to a peripheral edge part 2 of the door 2. The seal part 24 has a hollow main lip 25, an inner lip 26 protruded obliquely sideways into the main lip 25, and an outer lip 27 formed along a direction of intersecting the inner lip 26. The inner lip 26 is displaced interlocked with the displacement of the outer tip 27 caused by negative pressure generated during travel of an automobile, and an edge part 30 of the inner lip 26 imparts pressing force to the main lip 25 toward the body opening edge part 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weather strip having a seal portion which comes into contact with an opening edge when an opening / closing body such as an automobile door is closed, and a mounting base fixed to a peripheral edge of the opening / closing body. It is about.

[0002]

2. Description of the Related Art FIG. 4 is a front sectional view showing a state of attachment of a conventional weather strip for a door of an automobile. The conventional weatherstrip 1 integrally includes a mounting base 3 fixed to a peripheral portion 2 of an automobile door, a hollow main lip 4, and a fin 5 projecting upward.
The leading edge 9 of the main lip 4 and the fin 5 is in contact with the step plate 7 and the overhang plate 8 of the vehicle body opening edge 6 which are substantially perpendicular to each other.

[0003] When the door is closed, the weather strip 1 is compressed by the main lip 4 being in close contact with the step plate 7, and the leading edge 9 of the fin 5 is in close contact with the lower surface of the overhang plate 8,
Performs a sealing function and seals the inside of the vehicle body.

[0004]

However, in the conventional weatherstrip 1 described above, the outside of the vehicle body becomes negative pressure during traveling, and when this negative pressure is sucked out together with the door, the hollow main lip 4 is removed. In addition, there is a problem that the contact surface pressure between the fin 5 and the opening edge portion 6 of the vehicle body is reduced, and the sealing performance is reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has as its object to prevent the sealing performance from being lowered even if the outside of the vehicle body becomes negative pressure during running. On the contrary, it is an object of the present invention to provide a weather strip capable of improving the sealing property.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a sealing portion which contacts an opening edge of a vehicle body when an opening / closing body such as an automobile door is closed, and a peripheral portion of the opening / closing body. In a weather strip having a mounting base fixed thereto, the seal portion is formed along a direction intersecting the inner lip, a hollow main lip, an inner lip protruding into the main lip, and the inner lip. An outer lip, and the inner lip is displaced in conjunction with the displacement of the outer lip due to a negative pressure generated during the running of the vehicle, thereby applying a pressing force toward the vehicle body to the main lip. .

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A weather strip according to an embodiment of the present invention will be described in detail with reference to the drawings, taking as an example a case where the weather strip is mounted on a car door. FIG. 1 is a partial front sectional view showing a state in which a weather strip according to an embodiment of the present invention is attached to an automobile door and the door is opened and no external force is applied thereto. FIG. It is a front sectional view showing a closed state.

The weather strip 21 according to this embodiment has a sealing portion 24 integral with a mounting base 23, a hollow main lip 25, an inner lip 26 projecting into the main lip 25, and an inner lip 26. An outer lip 27 is formed along a direction intersecting the outer lip 27, and flexible portions 28 and 29 are provided at a connection portion between the main lip 25 and the inner lip 26 and the outer lip 27.

In the weather strip 21, the flexible portions 28 and 29 are deformed in response to the displacement of the outer lip 27 due to the negative pressure generated while the automobile is running, and the inner lip 26 is displaced to move the edge 30 thereof. Thus, a pressing force is applied to the main lip 25 toward the opening edge portion 6 of the vehicle body, so that a high sealing property is maintained during traveling.

The mounting base 23 is fixed to the peripheral portion 2 of the door as in the prior art. Hollow main lip 25
When the door is opened, the inner lip 26 and the outer lip 27 are connected via the thin flexible portions 28 and 29, as shown in FIG. When the door is closed, as shown in FIG. 2, the main lip 25 projects from the overhanging plate 8 of the vehicle body opening edge 6 and the step plate 7.
And abuts against the frame plate 10 following the lower end thereof, and is pressed by these to deform as if the cross section was crushed.

The inner lip 26 is located at a position where the edge 30 projects obliquely laterally into the main lip 25 and corresponds to the lower surface of the frame plate 10 at the opening edge 6 of the vehicle body. Outer lip 27
Is formed integrally with the outer end of the inner lip 26,
In a natural state without external force, as shown in FIG.
Here, it protrudes upward along a direction intersecting at a right angle with the inner lip 26, and has a substantially L-shaped cross section integrally with the inner lip 26, and an upper end edge of the overhang plate of the vehicle body opening edge 6. 8 is in contact with the outer surface plate 11 following the outer end. The inner lip 26 and the outer lip 27 are
The thickness is increased so that the deformation strength is larger than that of 8, 29.

The flexible portions 28 and 29 are connected to the main lip 25
Is formed in a thin portion at a connecting portion between the inner lip 26 and the inner lip 26, and when the inner lip 26 and the outer lip 27 are not subjected to an external force, these postures are maintained. As shown in FIG. 3, when the outer lip 27 is displaced, the inner lip 26 has such flexibility that the inner lip 26 is integrally displaced in conjunction therewith.

The above-mentioned weather strip 21
When the vehicle is stopped, as shown in FIG. 2, the main lip 25 is connected to the lower surface of the overhang plate 8, the outer surface of the step plate 7, and the frame plate 10.
The outer lip 27 contacts the lower surface of the
1 to maintain the sealing property.

When the automobile is running, the weather strip 21 is subjected to external negative pressure as shown in FIG.
The outer lip 27 is pulled out, displaced, and separated from the outer panel 11. As a result, the flexible portions 28 and 29 are deformed, and the inner lip 26 is also integrally displaced in conjunction therewith, so that the edge 30 pushes the main lip 25 against the lower surface of the frame plate 10 at the opening edge 6 of the vehicle body. Pressure is applied to the main lip 25. As a result, the surface pressure between the main lip 25 and the vehicle body opening edge 6 increases, and the sealing performance is maintained and improved.

In the weather strip 21 according to the embodiment of the present invention, the edge 30 of the inner lip 26 is pressed against the opening edge 6 of the vehicle body by a negative pressure during traveling, and the sealing property at the main lip 25 is improved. However, since the contact surface pressure between the main lip 25 and the vehicle body opening edge 6 when the door is closed can be set low, the tightness of the door is improved.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention. For example, the present invention can be applied not only to the upper portion of the door but also to the front and rear portions, and also to windows and the like that are opened and closed by turning other than the door. The angle formed may be an acute angle or an obtuse angle, and only one of the flexible portions 28 and 29 may be connected to the inner lip 26. .

[0017]

According to the present invention, the seal portion has a hollow main lip, an inner lip projecting laterally into the main lip, and an outer lip formed along a direction intersecting the inner lip. The inner lip is displaced in conjunction with the displacement of the outer lip due to the negative pressure generated during the traveling of the vehicle, and the main lip is applied with a pressing force toward the vehicle body, so that the outer side of the vehicle body during traveling is When the outer lip is displaced outward due to negative pressure, the inner lip is integrally displaced in conjunction with this and presses the main lip toward the vehicle body,
The sealing performance does not decrease and the sealing performance can be improved, and the contact surface pressure between the hollow main lip and the vehicle body opening edge when the door is closed is set low to improve the door tightness. This has the effect that it can be performed. In addition, the main lip, the inner lip, and the outer lip are provided with a flexible portion at the connecting portion, and the end of the inner lip is located at a position corresponding to the opening edge of the vehicle body. It is possible to more reliably maintain and improve the sealing performance at the time.

[Brief description of the drawings]

FIG. 1 is a partial front sectional view showing a state in which a weather strip according to an embodiment of the present invention is attached to an automobile door, the door is opened, and no external force is applied.

FIG. 2 is a front sectional view showing a state in which the weather strip according to the embodiment of the present invention is attached to a door of an automobile and the door is closed.

FIG. 3 is a front sectional view showing a state of a weather strip when a vehicle is running with a door closed.

FIG. 4 is a front sectional view showing a conventional weather strip.

[Explanation of symbols]

 2 Peripheral edge of door 6 Body opening edge 7 Step plate 8 Overhang plate 10 Frame plate 11 Outer plate 21 Weather strip 23 Mounting base 24 Seal portion 25 Main lip 26 Inner lip 27 Outer lip 28, 29 Flexible portion 30 Edge Department

Claims (2)

[Claims] 1. A weather strip, comprising: a sealing portion that contacts an opening edge of a vehicle body when an opening / closing body such as a door of an automobile is closed; and a mounting base fixed to a peripheral edge of the opening / closing body. The main body has a hollow main lip, an inner lip protruding into the main lip, and an outer lip formed along a direction intersecting the inner lip, and a negative pressure generated during driving of the vehicle. The inner lip is displaced in conjunction with the displacement of the outer lip by the above, and a pressing force is applied to the main lip toward the vehicle body. 2. The weatherstrip according to claim 1, wherein a connecting portion between the main lip, the inner lip, and the outer lip includes a flexible portion, and an edge of the inner lip is an edge of the vehicle body opening. A weather strip located at a position corresponding to.