JPH09226479A - Weather strip for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a lower end part of a front pillar part arranged along a front pillar from interfering with a door and the like when the door is opened/ closed so as to smoothly open/close the door and provide an excellent appearance inexpensively in a weather strip sealing a gap between a main body and the door in an automobile. SOLUTION: A front pillar part 12 arranged along a front pillar 2 is provided with an installation base part 18, which is installed to a main body or to a door 5 in an automobile 1, and a hollow sealing part 20. In extrusion molding of a gradually variable section in the lower end part of the front pillar part 12, its width direction dimension (w) is gradually reduced downward while the shape of the sealing part 20 is gradually changed from a hollow shape to a flat shape.

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 an automobile, which seals between an automobile body and a door in an automobile door opening.

[0002]

2. Description of the Related Art Conventionally, a space between a main body of an automobile and a door is sealed by a weather strip attached to the main body or a door window frame portion. In such a weather strip, the front pillar portion arranged along the front pillar of an automobile is usually provided with a hollow seal portion as a measure against wind noise. Therefore, particularly in a press door type automobile (a vehicle having a structure in which the door window frame part is press-molded integrally with the door outer plate), the hollow portion is formed at the lower end portion of the front pillar portion, that is, near the base when the door is opened and closed. -Shaped seal part interferes with the door,
There is a problem that the door cannot be opened and closed properly.

For example, as shown in FIG. 9, a front pillar portion 100 of a weatherstrip arranged along a front pillar 101 of an automobile is hollow with a mounting base portion 103 mounted on a mounting portion 102 of the front pillar 101. The seal portion 104 has a seal portion 104, and the seal portion 104 closes a gap opening between the vehicle body and the door window frame portion 105. However, when this cross-sectional shape is used as it is at the lower end portion of the front pillar portion 100, when the door is closed. Due to the door window frame portion 105, the hollow seal portion 104 is flipped up, and the door cannot be opened and closed properly.

Therefore, conventionally, as shown in FIG. 10, at the lower end portion of the front pillar portion 100 of the weather strip formed by extrusion molding, the hollow seal portion 1 is formed.
04 by an adhesive press using an adhesive or by molding.
Interference is prevented by deforming it into a flat shape 106.

[0005]

However, in order to prevent interference as described above, in addition to the extrusion process,
Since a mold forming step and an adhesive pressing step are required, there is a problem that the cost is high and that the extruded portion and the die formed portion have different color tones, resulting in poor appearance.

[0006] Therefore, an object of the present invention is to provide a weather strip for an automobile, which can be opened and closed satisfactorily and which is low in cost and looks good.

[0007]

A vehicle weather strip of the present invention is a weather strip that seals between a vehicle body and a door, and is a front pillar portion disposed along a vehicle front pillar. Is provided with a mounting base portion to be attached to the main body or the door and a hollow seal portion, and at the lower end portion of the front pillar portion, the widthwise dimension thereof gradually changes downward, and the seal portion is It is formed by extrusion so that it gradually changes from a hollow shape to a flat shape as it goes downward.

[0008]

According to the vehicle weather slip of claim 1,
At the lower end of the front pillar portion of the weather strip, the dimension in the width direction gradually changes downward and gradually,
Since the sealing portion is formed in a shape that gradually changes from a hollow shape to a flat shape as it goes downward, it is possible to open and close the door satisfactorily without the sealing portion interfering with the door or the like at the lower end portion when the door is opened or closed. . Moreover, since this shape is formed by extrusion molding, the molding step and the adhesive pressing step are omitted, and the appearance is low and the appearance is good.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A weather strip 10 for an automobile according to an embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, this weatherstrip 10 is a roofside rail / weatherstrip which is mounted from a front pillar 2 of a press door type automobile 1 to a rear pillar 4 through a roof side 3 and a rear pillar 4. It is formed by extrusion.

This weather strip 10 is shown in FIG.
As shown in FIG. 2, the front pillar 2 includes a mounting base portion 18 having a substantially C-shaped cross section that is attached to the body of an automobile, a seal portion 20 having a substantially P-shaped cross section having a hollow portion 20a, and a lip-shaped sub-seal portion 22. The front pillar portion 12 arranged along the front pillar portion 12, the roof side portion 14 arranged along the roof side 3, and the rear pillar portion 16 arranged along the rear pillar 4 are formed to have a predetermined cross-sectional shape. ing.

The structure of the front pillar portion 12 of the weather strip 10 will be described below.

As shown in FIG. 1, the front pillar portion 12
A gradual change section is formed at the lower end of the.

Above the gradual change section, the front pillar portion 12 is provided with a hollow portion 20a in which the seal portion 20 projects outward as shown in FIG. 4 (a). . The hollow portion 20a is located at the end portion on the opposite side of the mounting base portion 18 in the width direction of the front pillar portion 12.

In the gradually changing section, in the front pillar portion 12, as shown in FIGS. 2 to 4, the hollow portion 20a of the seal portion 20 is crushed toward the lower side to gradually change from the hollow shape to the flat shape, and The width w of the front pillar portion 12 has a shape in which the dimension gradually becomes shorter downward and gradually changes.

The gradual change in the hollow portion 20a is shown in FIG.
As shown in (c), the hollow portion 20a is crushed so that the hollow portion 20a protruding outward is gradually folded toward the center of the front pillar portion 12 in the width direction. The hollow portion 20a is completely flattened at the lower end of the variable section. Although not shown, the hollow portion 20a is not completely crushed, and is used even when the hollow portion is left slightly.

The gradual change in the width direction of the front pillar portion 12 is made by gradually shortening the width direction dimension of the seal portion 20. That is, the seal portion 20 has the gradually changing portion 20b substantially in the center of the front pillar portion 12 in the width direction, and the width direction dimension d of the gradually changing portion 20b is changed so as to become gradually shorter as it goes downward.

Below the gradually changing section, the front pillar portion 12 has the same sectional shape as the lower end of the gradually changing section shown in FIG. 4 (c).

FIG. 5 is a view showing a state in which the weather strip 10 is attached to the main body of the automobile 1, and is a cross section of a portion below the gradually changing section of the front pillar portion 12 (see FIG. 1).
VV cross section). In the front pillar portion 12, the mounting base portion 18 is fitted into the mounting portion 2a of the front pillar 2, the sub-seal portion 22 is in contact with the inner surface side of the door window frame portion 5a, and the flat seal portion is inside the door. The tip of 20 is in contact with the front pillar 2. The seal portion 20 has a smaller outward protrusion than a portion above the gradually changing section (shown by a dotted line in FIG. 5),
Moreover, the length from the mounting base portion 18 which is the fixed end to the tip of the seal portion 20 which is the free end is short.

Next, a method of manufacturing the weather strip 10 will be described.

The weather strip 10 is manufactured by extrusion molding as described above. That is, as shown in FIG. 6, the weather strip 10 is extruded in a predetermined shape from an extruder 26, guided to a vulcanizer 28 for vulcanization, and further cooled by a cooler 30 and then cut by a cutter. 32 is cut into a predetermined size.

During this extrusion molding, a predetermined portion of the weather strip 10 in the longitudinal direction, that is, the front pillar portion 1 is formed.
2 In the portion corresponding to the gradual change section of the lower end portion, gradual change in the width direction of the front pillar portion 12 and gradual change in the hollow portion 20a are simultaneously performed.

More specifically, as the extrusion die 36 attached to the tip of the extruder 26, as shown in FIG. 7A, a fixed mold 54 having a predetermined product opening 52a and a predetermined product opening 52b are provided. Using a split type extrusion die 36 having a movable die 56 slidable with respect to the fixed die 54,
In the portion corresponding to the gradually changing section, the moving die 56 is
As shown in (b) and (c), the opening portion 5 of the gradually changing portion 20b is formed.
The front pillar portion 12 is gradually changed in the width direction by moving the front pillar portion 12 so that the length of the front pillar portion 2c becomes gradually shorter. Then, in conjunction with the gradual change in the width direction of the front pillar portion 12, the hollow portion 20a of the seal portion 20 is gradually changed from the hollow shape to the flat shape with respect to the rubber 34 extruded from the extrusion die 36. The hollow portion 20a is crushed and gradually changed. That is, as shown in FIG. 8, the weather strip 10 extruded from the extrusion die 36 is placed between the extruder 26 and the vulcanizer 28, and the pair of upper and lower rollers 3 are arranged.
8 a and 38 b, the movable upper roller 38 a is gradually lowered in conjunction with the movement of the moving die 56 of the extrusion die 36, and the hollow portion 20 is provided at a portion corresponding to the gradually changing section.
Perform a gradual change in a.

In this weather strip 10,
The method of performing the two gradual changes is not particularly limited to the method described above.

In the weather strip 10 of the present embodiment described above, in the gradually changing section of the lower end portion of the front pillar portion 12, the widthwise dimension w is gradually changed and the hollow portion 20a is gradually changed. Since it is gradually changed, the lower end portion does not interfere with the door 5 when the door is opened and closed, and the door can be opened and closed properly.

Further, since these two gradual changes are molded by extrusion molding, the molding step and the adhesive pressing step are omitted, the cost is low and the appearance is good.

Particularly, since these two gradual changes are performed simultaneously, that is, in the same gradual change section, the appearance is very good.

In the gradual change in the hollow portion 20a, the hollow portion 20a protruding outward is crushed so as to be folded toward the center of the front pillar portion 12 in the width direction. The widthwise dimension w of the pillar portion 12 does not become long. Therefore, the gradual change part 2
There is no gradual loss in the width direction at 0b.

Although the weather strip 10 attached to the main body of the automobile 1 has been described in the above embodiments, the present invention is applicable to the door 5 side, that is, the door window frame portion 5.
It is also applicable to a weather strip attached to a.

[0030]

According to the weather strip for an automobile of the present invention, it is possible to open and close the door satisfactorily without the sealing portion interfering with the door or the like when the door is opened and closed, and to perform the molding step and the adhesive pressing step. It saves money and looks good at low cost.

[Brief description of drawings]

FIG. 1 is a side view of an automobile 1 showing an arrangement of an automobile weather strip 10 according to an embodiment of the present invention.

FIG. 2 is a front pillar portion 12 of the weather strip 10.
FIG.

FIG. 3 is a plan view of a main portion of a front pillar portion 12.

4A and 4B are cross-sectional views of the front pillar portion 12 shown in FIG. 3, in which FIG. 4A is a cross-sectional view taken along line AA, and FIG. 4B is a cross-sectional view taken along line BB.
(C) is a CC sectional view.

FIG. 5 is a sectional view taken along line VV of FIG. 1;

FIG. 6 is a schematic view of a manufacturing process of the weather strip 10.

FIG. 7 is a front view of an extrusion die 36 of an extruder 26 for manufacturing the weather strip 10, where (a) is a state before a gradual change section, (b) is a state in a gradual change section central portion,
(C) is a figure which shows the state after a gradual change area, respectively.

8 is an enlarged cross-sectional view showing a state where the hollow portion 20a of the seal portion 20 is crushed and gradually changed in the manufacturing process of the weather strip 10. FIG.

FIG. 9 is a front pillar portion 1 of a conventional weather strip.
It is sectional drawing in the vehicle mounting state of 00.

FIG. 10 is a perspective view of a main part of a front pillar portion 100 of a conventional weather strip.

[Explanation of symbols]

 1 …… Automobile 2 …… Front pillar 5 …… Door 10 …… Weather strip 12 …… Front pillar 18 …… Mounting base 20 …… Seal part 20a …… Hollow part 20b …… Slow change part w …… Front Width direction dimension of pillar 12

Claims (1)

[Claims] 1. A weather strip for sealing between a body of a vehicle and a door, wherein a front pillar portion arranged along a front pillar of the vehicle is hollow with an attachment base portion attached to the body or the door. And a bottom end portion of the front pillar portion, the widthwise dimension of which gradually decreases gradually downward, and the sealing portion gradually extrudes downward from a hollow shape to a flat shape. A weather strip for automobiles.