JP2621700B2 - Automotive weather strip - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weather strip for a motor vehicle, and more particularly to a structure of a corner portion of a door weather strip which is mounted along a periphery of a door opening of a vehicle and seals between the door opening and the door. It is.

[0002]

2. Description of the Related Art As shown in FIG. 1, as a weather strip 1 to be mounted along the periphery of a door opening of an automobile, as shown in FIG. And a hollow sealing portion 12 which projects substantially perpendicularly from one side surface and presses the peripheral edge of the door 20, and a tip end of which comes into contact with the flange side surface of the door opening peripheral edge from the opening side edge of the trim portion 11. An extruded body provided with the body seal lip 13 formed as described above was used.

However, when this extruded product is bent along a corner C (FIG. 1) around the door opening, the sealing portion 1
2 is irregularly deformed and the sealing performance with the peripheral edge of the door 20 is deteriorated. Therefore, the corner C portion is formed by connecting the extruded products by molding.

In this connection, the ends of the extruded products 1A and 1B are generally set to be substantially perpendicular to each other so as to be set in a cavity of a mold, and a hollow seal portion 1 is provided in the cavity.
2, a molding core is set, a molding material is injected between the cavity and the core, and the core is extracted after molding. Accordingly, an unavoidable core hole 2 remains in the hollow seal portion of the molded portion 1C which has been formed. Since the core hole 2 is conventionally located on the inner radius side of the corner C, the core hole is formed after molding. The opening edge of the hole 2 was bonded with an adhesive or the like to close the core hole 2.

[0005]

However, in the above-mentioned weather strip, when the coring hole 2 is closed, the cross section of the hollow sealing portion of the molded portion 1C is reduced by the width of the hole 2, and the sealing margin is reduced. As a result, the sealing property may be reduced.

The hollow seal portion of the molded portion 1C is formed so as to protrude substantially straight from one side surface of the trim portion 11, and has the same radius of curvature as the curved body-side flange. Therefore, there is a problem in that the shape does not correspond to the corner portion formed with a corner at a substantially right angle to the peripheral edge of the door, and a seal margin therebetween is small.

[0007] An object of the present invention is to eliminate the above disadvantages,
An object of the present invention is to provide a weatherstrip for an automobile in which the sealing property between a hollow sealing portion formed by molding at a corner portion and a peripheral edge of a door is maintained well.

[0008]

In order to achieve the above object, a weather strip for an automobile according to the present invention is provided with a trim portion 11 having a substantially U-shaped cross section and held on a flange 30 on the periphery of a door opening, and one of the trim portions 11. A hollow seal portion 1 that projects substantially perpendicularly from the side surface and presses the peripheral edge of the door 20.
In the weather strip 1 provided with the edge portion 2, the trim portion 11 at the corner C portion of the peripheral edge of the door opening is formed by trimming the trim portion 11 of the extruded body 1 </ b> A from which the side seal portion 12 is cut off.
3 is formed in a curved shape along the corner C
0 so that the corner C
The hollow seal portion 22 in the portion has substantially the same outer shape as the hollow seal portion 12 of the extruded body 1A, and extends along the upper side and the vertical side of the peripheral edge of the door opening, respectively. The extruded body 1A is cut off at a surface 11A of the seal portion 12 on the side of the trim portion 11A. A means in which a substantially triangular covering portion 23 is formed integrally is used.

[0009]

Since the core removing hole 2 is not formed in the seal portion 22 of the molding, the cross section of the seal portion 22 is not reduced, and the sealing margin is not reduced and the sealing performance is not reduced. In addition, since the molded seal portion 22 is formed so as to correspond to a corner portion formed with a corner at a substantially right angle to the peripheral edge of the door, the seal margin can be increased.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to embodiments for better understanding. The same parts as those in the conventional example are denoted by the same reference numerals in the illustrated example, and a part of the description is omitted.

As shown in FIGS. 1 to 5, a corner C portion of the weather strip 1 attached along the periphery of the door opening of the automobile has an extruded body in which a part of the seal portion 12 is cut off and curved. 1A, a trim portion 11 having a substantially U-shaped cross section, and an offset portion that is offset from the trim portion 11 to the outer peripheral side, and is bent to correspond to a corner portion formed with a corner at a substantially right angle to the peripheral edge of the door 20. A hollow seal portion 22 having a substantially circular cross section which is molded, and a substantially triangular shape which is formed integrally with the seal portion 22 and covers a cut surface 11A from which the extruded seal portion 12 on the side surface of the trim portion 11 is cut. And a covering portion 23 having a shape. That is, in the present invention, in the corner C portion which is conventionally entirely formed by molding, the trim portion 11 to be attached to the body is formed of the extruded body 1A, and the remaining portion is formed by molding. It was done.

As in the prior art, the extruded body 1A has a trim portion 11 having a substantially U-shaped cross section, and a cross section which protrudes almost straight from one side of the trim portion 11 on the vehicle exterior side and presses the peripheral edge of the door 20. A substantially circular hollow seal portion 12, a body seal lip 13, a lip 14 protruding from the vehicle interior side surface of the trim portion 11 to the vehicle interior to cover an end of an interior member (not shown), and formed on an inner surface of the trim portion 11. The trim portion 11 has a shape retaining insert 16 buried in the trim portion 11, and a decorative fabric is attached to the upper surface of the upper wall of the trim portion 11 and the upper surface of the lip 14. Have been.

Next, a method of manufacturing the corner C will be described. First, a hollow seal part 1 is formed from the extruded body 1A.
Cut out part of 2. (See FIG. 5) Then, the trim portion 11 where the seal portion 12 is cut off is bent at the same radius of curvature as the radius of curvature of the body flange, and is set at a predetermined position in the cavity of the mold. The cavity for forming the seal portion of the mold has a concave portion formed so as to have substantially the same outer shape as the outer shape of the hollow seal portion 12 of the extruded product 1A, and has a vertical portion with the upper side portion of the peripheral edge of the door opening. Each of the trim portions 11 is extended along the side portions, and is connected to the outer peripheral side of the curved and set trim portion 11. That is, the door 20 is bent substantially at a right angle so as to correspond to a corner portion of the peripheral edge of the door 20 formed at a substantially right angle with a corner. In the cavity of this mold, a substantially triangular-shaped concave portion for forming a covering portion that covers the cut surface 11A of the side of the trim portion 11 of the extruded body 1A is formed.

The extruded products 1 on both sides of the corner C portion
The core for forming the seal portion 22 inserted from the core removing slits 2A provided in the hollow seal portion 12 of FIG. 1A is set at a predetermined position of the cavity of the mold, and a molding material is injected into the cavity. Then, a molded part 1C including the seal part 22 and the covering part 23 is formed. Then, after molding, the molded product is taken out of the above-mentioned cavity, and an inner core is taken out of the core-dipping slit 2A to produce a corner C portion.

Since the seal portion 22 formed as described above does not have the coring hole 2 as in the prior art, the cross section of the seal portion 22 is not reduced after molding, and the seal portion 22 is not sealed. The properties are favorably maintained. In addition, although the core-forming slit 2A is formed in the hollow seal portion 12 of the extruded body 1A, this slit 2A
Seal portion 12 of extruded body 1A extruded with a predetermined cross section
Since the slit is inserted later, the opening is only provided when the core is inserted and discharged, and the cross section is not reduced while the cross section is usually in the extruded shape.

The molded seal portion 22 is bent and formed so as to be offset from the trim portion 11 to the outer peripheral side of the trim portion 11 so as to correspond to the shape of the peripheral edge of the door 20 to be abutted. Flange side surface 22B
Is formed on a plane substantially parallel to the side surface of the body flange 30 to form a fixed surface, and a double-sided adhesive tape 25 is adhered to the fixed surface to form an offset portion 22 of the seal portion 22.
A is fixed to the flange 30 of the body,
The second offset portion 22A does not shift or roll up, and can be sealed by contacting the peripheral edge of the door 20 with a larger seal margin than the conventional one. In the fixing on the fixing surface, an adhesive or a pressure-sensitive adhesive may be used instead of the double-sided adhesive tape 25.

At the time of the above-mentioned molding, the extruded product 1
Cutout surface 1 of seal portion 12 on side surface of trim portion 11 of A
Since the substantially triangular covering portion 23 covering 1A is integrally formed, the appearance of the side surface of the trim portion 11 is not impaired.
Further, since the covering portion 23 suppresses the restoration of the trimmed portion 11 that is curved, the curved state of the trimmed portion 11 is maintained, and the weather strip can be mounted at a proper position.

[0018]

As described above in detail, in the automotive weather strip of the present invention, since the core forming hole is not formed in the seal part of the mold, the cross section of the seal part of the mold is not reduced, and the seal margin is reduced. As a result, the sealing performance is not reduced.

Further, the seal portion of the mold is formed so as to correspond to a corner portion formed with a corner at a substantially right angle to the peripheral edge of the door to be abutted, that is, the hollow shape of the extruded body. Since the outer shape of the seal portion was substantially the same, and extended along the upper side portion and the vertical side portion of the peripheral edge of the door opening, it was offset to the outer peripheral side from the trimmed portion of the curved extruded body, and was bent and formed. It is possible to increase the seal margin with the peripheral edge of the door to be brought into contact.

Furthermore, since a substantially triangular covering portion covering the cut-off surface of the seal portion on the side surface of the trim portion of the extruded product is formed integrally at the same time as the molding, the appearance of the side surface of the trim portion is not impaired. Moreover, the restoration of the trim portion where the covering portion is curved is suppressed, and the curved state of the trim portion is maintained, so that the weather strip can be attached to a proper position.

[Brief description of the drawings]

FIG. 1 is a perspective view of an automobile to which a weather strip of the present invention is applied.

FIG. 2 is a perspective view of a main part of the weather strip according to one embodiment of the present invention as viewed from the front side.

FIG. 3 is a perspective view of a main part of the weather strip according to one embodiment of the present invention as viewed from the back side.

FIG. 4 is a cross-sectional view of a principal part of the weather strip according to one embodiment of the present invention, and is a cross-sectional view in an attached state at a position along line AA in FIG.

FIG. 5 is a perspective view showing a state in which a seal portion of an extruded product is cut off during the production of a weather strip according to one embodiment of the present invention.

FIG. 6 is a sectional view of a main part of a conventional weatherstrip.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Weather strip 1A Extruded body 1C Mold part 11 Trim part 12 Seal part of extrusion molding 22 Seal part of molding 23 Coating part

Claims (1)

(57) [Claims] 1. A trim portion having a substantially U-shaped cross section which is attached along a peripheral edge of a door opening of an automobile and is held by a flange on the peripheral edge of the door opening, and a hollow which projects from one side surface of the trim portion and presses the peripheral edge of the door. In a weatherstrip having a shape-like seal portion, the trim portion at the corner portion of the peripheral edge of the door opening is formed by a flange in which the trim portion of the extruded body from which the side seal portion is cut is formed in a curved shape along the corner. The hollow seal portion at the corner portion is formed to be curved so as to be held, and has substantially the same outer shape as the hollow seal portion of the extruded body, and is formed at an upper side portion and a vertical side portion of the peripheral edge of the door opening, respectively. It is extended along, is offset to the outer peripheral side from the curved trim portion, and is formed by bending by molding. The sealing portion of the molding includes a trim portion of the extruded body. Weather strip for an automobile, the coating of a substantially triangular shape covering a cropped surface of the sealing portion of the surface is characterized by being formed integrally.