JPH0971131A - Weather strip for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the seal lip of a door weather strip pressed to the lower face of the drip molding of a car body when a door is closed from being inverted and bent by the frictional resistance with the drip molding when the door is opened. SOLUTION: The lower half section 43a and the bend section 43b at its upper end of a seal lip 43 erected along a door frame protruded edge 11 from the base section 41 of a door weather strip 4 are made thin. A projection 431 is formed on the lower face side of the upper half section 43c extended from the bend section 43b and pressed to the lower face of a drip molding 2 at the tip to make it thin and prevent its bending. The side face of the projection 431 is coupled with the tip outer face of the protruded edge 11, and the bend section 43c is prevented from being inverted and deformed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door weather strip mounted around a door frame of an automobile door, and more particularly to a door weather strip provided with a seal lip which is pressed against the lower surface of a drip molding of a vehicle body.

[0002]

2. Description of the Related Art As a door weather strip attached to a door frame of an automobile, a hollow seal portion is pressed against a door opening edge of a vehicle body when the door is closed, and a drip molding provided on a roof side of the vehicle body along an upper edge of the door opening. A structure having a pressing seal lip and having a double seal between the seal portion and the seal lip is generally used (Japanese Utility Model Publication No. 64-25917).

By the way, there is a one-box type vehicle as shown in FIG. 3 in which the drip molding 2 is projected to the outer side of the door than the outer surface of the door. In such a vehicle model, the seal lip is of the drip molding when the door is closed. A seal structure is formed that enters the lower surface side and comes into pressure contact with the lower surface.

FIG. 4 shows a typical example thereof.
As shown in (A), the door weather strip 4 is in pressure contact with the base portion 41 attached to the outer peripheral surface of the door frame 1, the hollow seal portion 42 in pressure contact with the door opening edge 3 of the vehicle body, and the lower surface of the drip molding 2. A seal lip 43 is provided. The seal lip 43 extends from the vehicle outer side end of the base 41, and includes a lower half portion 43a, a bent portion 43b, and an upper half portion 43b.
The cross section has a V-shaped cross section, and the tip of the upper half portion 43c is in pressure contact with the lower surface of the drip molding 2 and is bent into a nearly right angle state.

However, as shown in FIG. 4 (B), when the door frame 1 is substantially parallel to the lower surface of the drip molding 2 when the door is opened, that is, when the door frame 1 moves to the outside of the vehicle in the direction of arrow D, the bent portion 43b opens and the door opens. The tip of the upper half portion 43c is less likely to slip on the lower surface of the drip molding 2 due to frictional resistance, and the upper half portion 43c is inverted into an inverted V shape. When the door is further opened and the tip is separated from the drip molding 2, the upper half portion 43c
May be reversed again and an abnormal noise may be generated.

[0006]

SUMMARY OF THE INVENTION Therefore, the present invention provides a door weatherstrip in which the above-mentioned abnormal noise is not generated and the seal lip pressed against the lower surface of the drip molding does not reverse when the door is opened. Was made as an issue.

[0007]

As illustrated in FIG. 1,
The door weather strip 4 of the present invention includes a base portion 41 attached to the outer peripheral surface of the door frame 1, a hollow seal portion 42 pressed against the door opening edge 3 of the vehicle body when the door is closed, and a drip molding 2 of the vehicle body when the door is closed. The seal lip 43 is pressed against the lower surface of the. The seal lip 43 has a lower half portion 43a standing upright from the vehicle outer end of the base portion 41 along the outer peripheral edge 11 of the door frame 1, and a bent portion 43b bent outward from the upper end of the lower half portion 43a. The upper half portion 43c extending obliquely outward from the bent portion 43b has a V-shaped cross section. The lower surface of the upper half portion 43c is a surface that extends downward along the outer surface of the tip of the projecting edge 11 to form a mountain-shaped protrusion 431, and further extends gently toward the tip of the upper half portion. The thickness of the portion 43c is made thicker than the thickness of the lower half portion 43a and the bent portion 43b.

However, the upper half 43c of the seal lip 43
The thickening of the upper half 43c and the end of the upper half 43c near the bent portion 43b are engaged with the door frame projecting edge 11 to prevent the seal lip 43 from reversing when the door is opened, thus causing the abnormal noise. Is also prevented.

The above-mentioned reversal of the seal lip 43 is caused by the upper half 4
The protrusion 431 on the lower surface of 3c is formed of solid rubber to enhance the engagement with the door frame projecting edge 11, or the center portion 432 of the upper half 43c is formed of solid rubber to form the upper half 43c. It can be prevented more reliably by increasing the rigidity of.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1A, a door weather strip 4 has a base portion 41, a hollow seal portion 42 and a seal lip 43, and can be obtained by extruding sponge rubber. Then, it is attached to the door frame 1 by fitting the base portion 41 to the retainer 12 formed on the outer peripheral surface thereof. The hollow seal portion 42 bulges from the base portion 41 toward the inside of the vehicle. The seal lip 43 extends from the end of the base portion 41 on the vehicle outer side, and stands up along the outer peripheral edge 11 of the door frame 1.
And the bent portion 43 that bends outward from the upper end of the lower half portion 43a.
b and the upper half portion 43c extending obliquely upward from the bent portion 43b to the vehicle outer side have a V-shaped cross section. The bent portion 43b is located above the upper end of the projecting edge 11.

The lower half portion 43a and the bent portion 43b have a substantially uniform thickness. The lower surface of the upper half portion 43c has a mountain shape with a steep slope on the bent portion 43b side and a gentle surface on the tip end side. As a result, the upper half portion 43c is formed with a protrusion 431 on the bent portion 43b side, and the lower half portion 43a and the bent portion 4 are formed.
It is thicker than 3b, and the thickness is tapered toward the tip. As for the steep side surface of the projecting portion 431, the base end side thereof abuts the outer surface of the distal end of the protruding edge 11, and the distal end side thereof is the protruding edge 1
1 has a shape slightly separated from the outer surface. Upper half 43c
The upper surface of is a flat surface or a gently convex curved surface.

The thickness of the seal lip 43 varies depending on the type of vehicle using the weather strip 4, but in general, the lower half 43
a and the bent portion 43b are 1 to 2 mm, and the middle portion of the upper half portion 43c is about 4 to 5 mm.

However, when the door is closed, the hollow seal portion 42 is pressed against the door opening edge 3 of the vehicle body [FIG. 1 (A)]. on the other hand,
The seal lip 43 has an upper half portion 43 as shown in FIG.
With the top surface of the tip of c being pressed against the bottom surface of the drip molding 2, it moves in the vehicle interior direction, and becomes a bent shape that is almost a right angle.

Next, when the door is opened, frictional resistance acts on the upper surface of the tip of the upper half 43c of the seal lip 43 which is in pressure contact with the lower surface of the drip molding 2. However, since the upper half portion 43c is formed sufficiently thick, the upper half portion 43c itself does not bend in an inverted V shape. Also, the door frame flange 1
In the bent portion 43b surrounding the tip of No. 1, since the protruding portion 431 engages with the outer surface of the tip, the bent portion 43b does not reversely bend like a mouth. Therefore, the seal lip 43 moves to the outside of the vehicle with the same shape, and the drip molding 2
Move away from At this time, the seal lip 43 is restored from a bent state close to a right angle to a bent shape, but no abnormal noise is generated unlike when the seal lip 43 is inverted and deformed.

FIG. 2 shows another embodiment of the present invention. In the embodiment of FIG. 2 (A), the protruding portion 431 on the lower surface of the upper half portion 43c of the seal lip 43 is made of solid rubber. The door weather strip 4 is obtained by integrally extruding a solid rubber protrusion 431 and another portion of sponge rubber. Edge 11 of door frame 1
By forming the protruding portion 431 that engages with the solid rubber, the opening of the lower surface of the bent portion when the door is opened can be prevented more reliably.

In the embodiment of FIG. 2B, the seal lip 4
The middle core portion 432 of the upper half portion 43c of No. 3 is made of solid rubber. As a result, the inversion bending of the upper half portion 43b when the door is opened is more reliably prevented. Since the solid rubber is only the center core portion 432 of the upper half portion 43c and the outer periphery is formed of sponge rubber, the drip molding 2
The sealing property between the and is secured. In addition, FIG.
(B) In either case, since the deformability of the bent portion 43b does not change when the door is closed, the door closing force does not increase.

[0017]

According to the present invention, the seal lip of the door weather strip, which enters the lower surface side of the drip molding outside the vehicle when the door is closed and the tip of which is pressed against the lower surface, is caused by the friction resistance with the lower surface when the door is opened. There is no inversion bending, so that no abnormal noise due to reinversion occurs when the seal lip separates from the drip molding.

[Brief description of drawings]

1 shows an embodiment of the present invention, FIG. 1 (A) is a sectional view of a door weather strip in an attached state at a tank position taken along the line AA in FIG. 3, and FIG. It is sectional drawing which shows the seal lip at the time.

2A and 2B are cross-sectional views showing a seal lip according to another embodiment of the present invention.

FIG. 3 is a side view of an automobile to which the door weather strip of the present invention is applied.

4A and 4B are cross-sectional views showing deformation of a seal lip of a conventional weather strip when the door is closed and when the door is opened.

[Explanation of symbols]

 1 Door Frame 11 Projection Edge 2 Drip Mall 3 Door Opening Edge 4 Door Weather Strip 41 Base 42 Hollow Seal 43 43 Seal Lip 43a Lower Half 43b Bent 43c Upper Half 431 Projection 432 Center Core

Claims (3)

[Claims] 1. A door weather strip for mounting along the outer peripheral surface of a door frame of an automobile door, the base being mounted on the peripheral surface, and a hollow protruding from the base and press-contacting a door opening edge of a vehicle body when the door is closed. In a door weather strip having a seal portion and a seal lip that extends from the vehicle outer side end of the base portion along the protruding edge of the outer periphery of the door frame and comes into pressure contact with the lower surface of the drip molding on the vehicle body roof side when the door is closed, The seal lip, a lower half portion standing up along the protruding edge, a bent portion that is bent above the protruding edge from the lower half portion toward the vehicle exterior direction, and an upper half portion that extends obliquely outward from the bent portion. A cross-section that is substantially V-shaped and has a lower surface of the upper half portion that extends downward along the outer surface of the tip of the projecting edge to form a chevron-shaped protrusion, and that further extends gently toward the tip of the upper half portion. To form A door weather strip for an automobile, characterized in that the thickness of the upper half portion is thicker than the thickness of the lower half portion and the bent portion. 2. The door weather strip for an automobile according to claim 1, wherein the protruding portion is formed of solid rubber and the other portion is formed of sponge rubber. 3. A door weather strip for an automobile according to claim 1, wherein the center part of the upper half part is made of solid rubber and the other part is made of sponge rubber.