JPH05139217A - Weatherstrip for automobile - Google Patents

Abstract

PURPOSE:To provided a weatherstrip for an automobile which maintains sealing ability between a hollow seal part formed by die molding and a door peripheral edge at a corner part. CONSTITUTION:In a weatherstrip provided with a trim part which is held by a flange on a door opening peripheral edge, and whose sectional surface is of roughly U-shape and a hollow seal part 12 whose one side surface projects to press the door peripheral edge, the trim part at the corner part of the door opening peripheral edge is formed so that the trim part of an extrusion molding body 1A whose seal part 12 on the side surface is cut out may be bent along the corner. Besides, the hollow seal part 22 at the corner part is formed into a roughly same shape as the external shape of the seal part of the extrusion molding body, and extended along the upper edge part and longitudinal edge part of the door opening peripheral edge and offset to the outer peripheral side from the trim part so as to be formed by means of die molding, and a covering part 23 in a rough triangle which covers the cut surface of the seal part on the trim part side surface of the extrusion molding body is formed integratedly with the seal part.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art As shown in FIG. 1, as a weather strip 1 attached along the periphery of a door opening of an automobile, as shown in FIG. 6, a trim portion 11 having a substantially U-shaped cross section and held by a flange at the periphery of the door opening. And a hollow seal portion 12 protruding substantially straight from one side surface thereof to press the peripheral edge of the door 20, and the tip end abuts from the opening side edge of the trim portion 11 to the flange side surface of the door peripheral edge. There is also one using an extruded body provided with the body seal lip 13 formed in FIG.

However, when the extruded body is bent along the corner C (FIG. 1) at the periphery of the door opening, the seal portion 1 is formed.
Since 2 deforms irregularly and the sealing property with the peripheral edge of the door 20 deteriorates, the corner C portion is formed by connecting extrusion molded bodies by molding.

In this connection, the ends of the extrusion-molded bodies 1A and 1B are generally set at right angles to each other so as to be set in the cavity of the mold, and the hollow seal portion 1 is provided in the cavity.
2 The core for forming is set, the molding material is injected between the cavity and the core, and the core is extracted after molding. Therefore, the core sealing hole 2 inevitably remains in the hollow seal portion of the molded portion 1C that has been molded. Conventionally, the core discharging hole 2 is located on the bent inner diameter side of the corner C. The core hole 2 is closed by adhering the opening edge of the hole 2 with an adhesive or the like.

[0005]

However, in the above-mentioned weather strip, when the core removal hole 2 is closed, the hollow seal portion of the molding portion 1C is reduced in cross section by the width of the hole 2 and the sealing margin is small. Therefore, the sealing property may be deteriorated.

Further, the hollow seal portion of the molding portion 1C is formed so as to project 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 sealing margin between them does not correspond to the shape of the corner portion which is formed with a corner at a substantially right angle on the peripheral edge of the door, and the sealing margin therebetween is small.

The object of the present invention is to solve the above problems,
It is an object of the present invention to provide a weather strip for an automobile in which the sealing property between the hollow seal portion formed by molding at the corner portion and the door peripheral edge is favorably maintained.

[0008]

In order to achieve the above object, the automotive weather strip of the present invention has a trim portion 11 having a substantially U-shaped cross section and held by a flange 30 at the peripheral edge of a door opening, and one of the trim portion 11. Hollow seal part 1 which projects substantially straight from the side surface and is pressed against the peripheral edge of the door 20.
In the weather strip 1 including the trim strip 11 and the trim strip 11 at the corner C of the peripheral edge of the door opening, the trim strip 11 of the extruded body 1A in which the side seal portion 12 is cut off is provided.
Flange 3 having a curved shape along the corner C
The corner C is formed so as to be curved so as to be held at 0.
The hollow seal portion 22 in the portion is substantially the same as the outer shape of the hollow seal portion 12 of the extruded body 1A, and extends along the upper side portion and the vertical side portion of the door opening peripheral edge, respectively, and is curved. The trimming portion 11 is offset to the outer peripheral side of the trimmed portion 11 and is bent and formed by molding. A means in which a substantially triangular covering portion 23 for covering the above is integrally formed is adopted.

[0009]

Since the core hole 2 is not formed in the molded seal portion 22, the cross-section of the seal portion 22 is not reduced, and the sealing margin is not reduced so that the sealing performance is not deteriorated. Further, since the molded seal portion 22 is formed corresponding to the corner portion which is formed with the corner portion at a substantially right angle on the peripheral edge of the door, the seal margin can be increased.

[0010]

EXAMPLES In order to better understand the present invention, examples will be described below. The same parts as those of the conventional example are designated by the same reference numerals in the drawings and a part of the description thereof is omitted.

The corner C portion of the weather strip 1 attached along the periphery of the door opening of the automobile shown in FIG. 1 is an extruded body in which a part of the seal portion 12 is cut off and curved as shown in FIGS. 2 to 5. 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 corresponding to a corner portion that is formed with corner portions at a substantially right angle on the periphery of the door 20. A hollow seal portion 22 having a substantially circular cross section that is molded, and a substantially triangular shape that covers the cut surface 11A that is molded integrally with the seal portion 22 and that has been cut out from the extruded seal portion 12 on the side surface of the trim portion 11 It is formed with a shaped covering portion 23. That is, in the present invention, in the corner C portion which has conventionally been entirely formed by molding, the trim portion 11 to be attached to the body is made of the extruded body 1A, and the remaining portion is formed by molding. It was done.

As in the conventional case, the extruded body 1A has a cross section in which a trim portion 11 having a substantially U-shaped cross section and a side surface of the trim portion 11 on the vehicle exterior side, which projects substantially straight from the side surface, presses the peripheral edge of the door 20. Formed on the inner surface of the trim portion 11, a substantially circular hollow seal portion 12, a body seal lip 13, a lip 14 projecting inward from the vehicle inner side surface of the trim portion 11 to cover the end portion of an interior member (not shown). The trim part 11 has a shape-retaining insert 16 embedded therein, and the upper part of the upper wall of the trim part 11 and the upper part of the lip 14 are provided with decorative fabrics. Has been done.

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

Extruded bodies 1 on both sides of the corner C portion
A core for molding the seal portion 22 inserted from the core removing slit 2A provided in each hollow seal portion 12 of A is set at a predetermined position of the cavity of the mold, and a molding material is injected into the cavity. The mold forming portion 1C including the seal portion 22 and the covering portion 23 is formed. After the molding, the molded product is taken out from the cavity, and the inner core is taken out from the core removing slit 2A to manufacture the corner C portion.

Since the core molding hole 2 as in the conventional case does not exist in the die-molded seal portion 22 formed as described above, the cross-section of the seal portion 22 is not reduced after molding and the seal is not formed. The goodness is maintained. In addition, although the core-extracting slit 2A is formed in the hollow seal portion 12 of the extruded body 1A, this slit 2A is
Seal part 12 of extruded body 1A extruded in a predetermined cross section
Since the slit is inserted later, the core is opened only when the core is inserted and discharged, and the cross-section is not normally reduced with the cross-sectional shape extruded.

The molded seal portion 22 is offset and bent toward the outer peripheral side of the trim portion 11 so as to correspond to the shape of the peripheral edge of the door 20 with which it is abutted, and the offset portion 22A of the seal portion 22 is formed. Flange side surface 22B
Is a fixed surface formed on a plane substantially parallel to the side surface of the flange 30 of the body, and the double-sided adhesive tape 25 is attached to the fixed surface to offset the offset portion 22 of the seal portion 22.
Since A is fixed to the body flange 30, the seal portion 2
The second offset portion 22A is not displaced or rolled up, and can be sealed by abutting on the peripheral edge of the door 20 with a seal margin larger 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.

Further, at the time of the above-mentioned molding, the extrusion molded body 1
Cutaway surface 1 of the seal portion 12 on the side surface of the trim portion 11 of A
Since the substantially triangular covering portion 23 that covers 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 curved trim portion 11, the curved state of the trim portion 11 is maintained, and the weather strip can be attached to the regular position.

[0018]

As described above in detail, in the automobile weather strip of the present invention, since the core punching hole is not formed in the seal portion of the molding, the cross section of the sealing portion of the molding is not reduced and the sealing margin is small. It does not deteriorate the sealing property.

Further, the sealing portion of the molding is made to correspond to the corner portion which is formed with the corner portion at a substantially right angle of the peripheral edge of the door to be contacted, that is, the hollow shape of the extruded body. Since the outer shape is substantially the same as the outer shape of the seal portion, and is formed by being bent and formed on the outer peripheral side of the trim portion of the curved extruded body that is extended along the upper side portion and the vertical side portion of the door opening peripheral edge, respectively, It is possible to increase the sealing margin with the peripheral edge of the door with which it abuts.

Furthermore, since the substantially triangular covering portion for covering the cut surface of the seal portion on the side surface of the trim portion of the extruded body is integrally formed at the same time of molding, the appearance of the side surface of the trim portion is not impaired. In addition, since the trim portion in which the covering portion is curved is restrained from being restored and the curved state of the trim portion is maintained, the weather strip can be attached to the regular position.

[Brief description of 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 the 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 the embodiment of the present invention as viewed from the back side.

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

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

FIG. 6 is a cross-sectional view of a main part of a conventional weather strip.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Weather strip 1A Extruded body 1C Molding part 11 Trim part 12 Extrusion molding seal part 22 Molding seal part 23 Cover part

Claims (1)

[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 of the peripheral edge of the door, and a hollow portion protruding from one side surface of the trim portion to press the peripheral edge of the door. In a weather strip having a sheet-shaped seal portion, the trim portion at the corner portion of the peripheral edge of the door opening is a flange formed by curving the trim portion of the extruded product with the side seal portion cut off along the corner. The hollow seal portion formed in a curved shape so as to be held is substantially the same as the outer shape of the hollow seal portion of the extrusion molded body, and is formed on the upper side portion and the vertical side portion of the door opening peripheral edge, respectively. The extruded body has a trim portion of the extruded body, which is extended along the outer periphery of the curved trim portion and is offset by molding to form a bent portion. 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.