JPH0930258A - Weather strip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the rigidity of strip piece end parts and provide a weatherstrip excellent in appearance by positioning a connecting part for strip pieces of core material, provided on one side of a fittingly fixed part of the weather strip, at the end parts of the strip pieces in the fittingly fixed part formed by embedding the core material with the strip pieces, arranged in duckboard shape, in raw material with elasticity. SOLUTION: A weather strip 1 has a fittingly fixed part 3 of U-shape cross section in order to be fittingly fixed to a body flange 2. A rib-like fittingly fixing claw 4 is provided on the inner surface of the fittingly fixed part 3, and an interior lip 6 to be brought into elastic contact with interior material 5 is provided on the inner face (interior side) of a body. Core material 7 of U-shape cross section formed in duckboard shape with strip pieces 8 arranged in its state before bending is embedded in the fittingly fixed part 3, being positioned almost at a thick-walled center part. In this case, the core material 7 is provided with connecting parts 9 for the strip pieces 8 in two places, and one connecting part 9 is provided in an approximately quarter part in a longitudinal direction from one end side of the strip pieces 8, while the other connecting part 9 is provided at the other end side of the strip pieces 8. The substantial rigidity of the strip pieces 8 is thereby enhanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mounted on the periphery of an opening of a main body of an automobile or the like to cover the tip of a body flange,
Further, the present invention relates to a weatherstrip that is color-matched with an interior material or the like, and more specifically, to a weatherstrip in which a cage-shaped core material in which strips are arranged is embedded.

[0002]

2. Description of the Related Art Conventionally, a so-called weather strip is provided at the periphery of an opening of a vehicle body such as a door or a trunk of an automobile so as to cover the tip of a body flange and color-match with interior materials. There is. There are various types of weather strips, and for example, there is one in which a core material in which strips made of metal are arranged in a cage shape is appropriately embedded in rubber or resin having elasticity.

In this type of weather strip, as shown in FIG. 6, a core material (b) in which a large number of strips (a) are arranged in parallel in a cage shape is embedded in a coating layer made of rubber or synthetic resin. While being extruded. Immediately after the extrusion molding, the portion in which the core material (b) is embedded is appropriately bent and shaped to have a U-shaped cross section so that it can be attached to, for example, a body flange formed in an opening of an automobile,
What formed the fitting part is known.

In this case, the core material (b) is formed in a cage shape in order to improve the close contact with the coating layer, the bendability of the fitting portion, the followability to the shape of the opening, and the like (ease of deformation). Has been formed. Therefore, it is preferable that the number of connecting portions (c) that connect a large number of strips to be as small as possible. Normally, the connecting portion (c) is bent and formed into a U-shape to form a fitting portion.
It is provided at each location (see, for example, Japanese Utility Model Laid-Open No. 3-52259).

[0005]

In the conventional weather strip, since the shape of the core of the core material tends to vary during extrusion molding, the image of the core material is likely to appear on the surface of the weather strip and is not desirable in appearance. Or. In addition, since the end of the strip of the core material is long and slender, the rigidity tends to be unnecessarily low, and the ends of the strip are bent or twisted alternately due to expansion and contraction of the coating layer during molding. However, there is a problem that the edge tends to be finely wavy.

On the other hand, a texture pattern may be formed on the outer surface of the weather strip for the purpose of alleviating the above-mentioned appearance defects and for the purpose of giving a high-grade feeling and softness. In that case,
For example, as shown in FIG. 7, the weather strip before being bent into a U-shaped cross section is pinched by the lower embossing roller (d) and the upper pressing roller (e) in the figure to continuously form an embossed pattern on the outer surface thereof. Is attached. However, since the inner surface of the weather strip is provided with a plurality of pleated fitting claws (f) at its fitting part, when this pressing claw (f) is pressed by the pressing roller (e), As described above, since the rigidity of the end portion of the strip (a) of the core material (b) is low, the edge (g) of the weather strip tends to bend toward the presser roller (e) side, and therefore, the warp roller ( D) There was a problem in that the wrinkle pattern was not clearly attached to the edge (g) of the weather strip due to insufficient pressure on the surface. In addition, when compressed by a texture roller or the like, rubber or synthetic resin escapes from the gap (h) of the core material and becomes thin, making it difficult to form a spot pattern, or the core material marks are visible, resulting in poor appearance. There was a problem.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to change the shape of the core material of the weather strip to enhance the rigidity of one end of the strip. This prevents the phenomenon that the core shape of the core material appears on the surface of the weather strip and the fine waviness that appears on the edge of the weather strip, and even when the textured pattern is attached to the outer surface of the weather strip, the edge is clearly visible. It is intended to provide a weatherstrip with a texture pattern and an excellent appearance.

[0008]

SUMMARY OF THE INVENTION The object of the present invention is to provide:
In a weather strip formed by embedding a core material in which strips are arranged in a cage shape in an elastic material, a connecting portion of the strips of the core material located on one side of the fitting portion of the weather strip is the strip piece. It is solved by a weatherstrip characterized in that it is formed so as to be located at the end of the. Further, the above problem can be solved by a weather strip characterized in that a texture pattern is provided on the outer surface of the fitting portion. Further, as a preferred embodiment of the present invention, a notch is provided in the connecting portion of the strips of the core material, and the depth of the notch is 1 mm.
The width of the connecting portion can be set to be in the range of 1 to 3 mm, and the distance between the strips can be set to be in the range of 1 to 1.5 mm.

In the weather strip according to the present invention, since the ends of the strips of the cage-shaped core material embedded in the coating layer made of rubber or synthetic resin are connected, the variations of the strips can be suppressed. As a result, the shape of the core of the core is difficult to appear on the surface, and the strips are not bent or twisted alternately, so that the corrugation phenomenon at the edge of the weather strip is prevented. Further, even when a wrinkle pattern is formed on the outer surface of the weather strip by the pressing force between the embossing roller and the pressing roller, the core material having the above configuration can increase the substantial rigidity of the strip end portion,
Even if the fitting portion is provided with a fitting claw or the like, it is possible to avoid a state of escaping with respect to the pressing of the texture roller, for example, a state of bending toward the pressing roller side, and it is possible to sufficiently reach the edge of the weather strip. It can be pressed to create a clear grain pattern. In addition, the material between the cores does not become thin because it cannot escape during compression of the warp roller.
Therefore, the grain pattern is clearly attached and the appearance can be improved.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of a weather strip 1 of the present invention, and FIG. 2 is a transverse view showing a state in which the weather strip 1 is fitted to a body flange 2 at the periphery of an opening of a vehicle body, for example. It is a side view.

As shown in FIGS. 1 and 2, the weather strip 1 has a fitting portion 3 formed in a U-shaped cross section so as to be fitted to the body flange 2, and the inner surface of the fitting portion 3 has a fitting portion 3. A fold-shaped fitting claw 4 is provided, and an inner lip 6 for elastically contacting the inner member 5 is provided on the inner surface (inside the room) of the body. Further, in the fitting portion 3, a core material 7 having a U-shaped cross section is located at a substantially central portion of the wall thickness, and is continuously embedded in the longitudinal direction of the weather strip 1.

As shown in FIG. 3, the core material 7 is in the form of a flat plate and in the shape of a cage in which strips 8 are arranged in a state before being bent and formed into a U shape. Then, there are two connecting portions 9 of the strip piece 8, for example, one of them is located at approximately 1/4 in the longitudinal direction from one end of the strip piece 8, and another is at the other end of the strip piece 8. Is configured to be located.

The weather strip 1 is present at the end of the strip 8 on the side of the fitting portion 3 where the interior lip 6 is absent (outside the room) by ordinary extrusion and bending using the core material 7. It is formed integrally with the coating layer 10 so that the connecting portion 9 is located. As the coating layer 10, a general material such as synthetic resin such as polyvinyl chloride (PVC), natural rubber, synthetic rubber can be used, but the material is not particularly limited. The core material 7 is manufactured by punching a thin metal plate, but its application is not limited by other materials and processing methods.

Further, as shown in FIG. 4, a recess 12 having an appropriate depth h can be formed on the surface of the core member 7 at a position corresponding to the connecting portion 9 by rolling or the like. For example, when the thickness H of the core material 7 is about 0.4 to 0.5 mm, the recessed portion 12 can have a depth h of about 0.2 to 0.3 mm. With such a configuration of the recessed portion 12, when the weather strip 1 is mounted in a shape corresponding to the body flange 2, the core material 7 breaks out in the recessed portion 12 and is easily molded. It should be noted that the recessed portion 1 is formed by rolling.
In some cases, 2 is not formed, but in this case, only the connecting portion 9 at the end, which is heavily loaded during molding, breaks out.

As described above, by connecting the ends of the strips of the elastic core material embedded in the coating layer made of rubber or synthetic resin, it is possible to suppress variations in the strips. As a result, it becomes difficult for the core shape of the core material to appear on the surface, and the strips are prevented from being bent or twisted alternately, so that the waving phenomenon at the edge of the weather strip can be effectively avoided. Further, even when the textured pattern is formed on the outer surface of the weather strip by the texture roller, the substantial rigidity of the strip piece end portion can be increased, and therefore even if the fitting portion is provided with a fitting claw or the like, It is possible to avoid a warp bending that escapes with respect to pressing, and it is possible to surely give a wrinkle pattern to the end edge of the weather strip.

The present invention is not limited to the above-described embodiment, but can be variously modified. For example, the interior lip 6
In the weather strip without the provision of the above, since the above-mentioned appearance defects also appear on the indoor side, for example, as shown in FIG. 5, by providing the connecting portions 9 of the strips 8 at the central portion and both end portions, Appearance can be prevented. Note that FIG.
In, the notch 11 is provided in the connecting portion 9 on one side (the connecting portion on the left side). The notch 11 has, for example, a thickness of the core member 7 of about 0.4 to 0.5 mm and a width t0 of the connecting portion 9.
Is about 1.0 to 3.0 mm, and when the t2 between the strips 8 is about 1.0 to 1.5 mm, the depth t1 may be as small as 1 mm or less, and the connecting portion 9 on the left side may be It has the effect of facilitating layout.

[0017]

As described above, according to the present invention, the connecting portion for connecting the strips of the cage-shaped core material embedded in the coating layer of the weather strip as described above is located at the end of the strips. , It is possible to increase the substantial rigidity of the strip, it becomes less susceptible to the expansion and contraction of the coating layer at the time of molding, the shape of the core of the core appears on the surface of the weather strip, and its edges are wavy. And a weather strip excellent in appearance can be obtained. Further, even when the weather strip is subjected to texturing, it is possible to increase the rigidity of the end portion of the strip of the core material, especially on the end portion side.
The end does not bend undesirably due to the pressing of the embossing roller, and when compressed by the embossing roller etc., the rubber or synthetic resin does not escape from the gap (chi) of the core material, so it does not become thin and has an embossed pattern Can be clearly attached to the edge of the weather strip.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a weather strip of the present invention.

FIG. 2 is a cross-sectional view showing a state where the weather strip of FIG. 1 is fitted to a body flange of an automobile or the like.

FIG. 3 is a plan view of a weather strip core material of the present invention.

FIG. 4 is a plan view showing another embodiment of the core material for weather strips of the present invention.

FIG. 5 is a side view showing another embodiment of the core material for weather strips of the present invention.

FIG. 6 is a plan view showing a core material of a conventional weather strip.

FIG. 7 is a perspective view showing a textured state using a conventional weather strip.

[Explanation of symbols]

 1 Weather Strip 2 Body Flange 3 Fitting Part 4 Fitting Claw 5 Interior Material 6 Interior Lip 7 Core Material 8 Strip Piece 9 Connecting Part 10 Covering Layer 11 Notch 12 Recessed Part

Claims (3)

[Claims] 1. A weather strip (1) in which a core material (7) in which strips (8) are arranged in a cage shape is embedded in an elastic material, wherein the weather strip (1) is used.
The connecting portion (9) of the strip piece (8) of the core material (7) located on one side of the fitting portion (3) is formed so as to be located at the end of the strip piece (8). A weather strip characterized in that. 2. The weather strip according to claim 1, wherein the fitting portion (3) is provided with a texture pattern on the outer surface thereof. 3. The notch (11) is provided at the connecting portion of the strip (8) of the core material (7), and the depth (t1) of the notch (11) is set to 1 mm or less so that the connecting portion (8 The width (t0) of 9) is formed in the range of 1 to 3 mm, and the distance (t2) between the strips (8) is formed in the range of 1 to 1.5 mm. Weather strip.