JP2004042692A - Weather strip for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent reduction of assembly workability of a peripheral component due to biting of burr and peeling of a molded part through burr without performing deburring. <P>SOLUTION: In a weather strip (glass run 11) in which basic cross section is formed by extrusion molding and a different-shaped molding 18 is molded by molding and is simultaneously joined on a side end face 16b on which a part of cross section of the extrusion molded part 15 is cut and formed along the longitudinal direction, a curve-shaped recessed part 19 is provided in a section where a terminal part 18a of the different-shaped molding 18 among side end faces 16b of the extrusion molded part 15 is positioned. The terminal part 18a of the different-shaped molding 18 is formed so as to cross a part of the recessed part 19. Burr 20 generated in the terminal part 18a of the different-shaped molding 18 is positioned in the recessed part 19 and is not exposed to the outside in a general part of the side end face 16b. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The invention of this application relates to a weather strip for a vehicle in which a molded part is joined to an extruded part.
[0002]
[Prior art]
FIGS. 4 to 6 show a structure of a glass run which is one form of a weather strip for a vehicle.
[0003]
As shown in FIG. 5, the glass run 1 includes a main body 2 having a substantially U-shaped cross section for guiding a side edge of a door glass, and a front end portion on both side walls of the main body portion 2 and arranged on the vehicle exterior and the vehicle interior, respectively. The basic section has an outer molding 3 and an inner molding 4 that extend and cover the terminal of the door panel. Although the basic section of the glass run 1 is formed by extrusion molding, the region below the vicinity of the door waist portion of the glass run 1 is formed into an irregular cross section by cutting and molding a part of the basic section.
[0004]
Specifically, the outer molding 3 and the inner molding 4 of the basic cross section are cut off from the base portion along the longitudinal direction below the vicinity of the door waist portion of the glass run 1, and the door waist portion is provided near the door waist portion. Are formed by molding. The deformed moldings 5 and 6 are formed so as to be continuous with the side end surface 8 of the extruded portion 7 after the excision. The deformed moldings 5 and 6 form a predetermined region of the side end surface 8 of the extruded portion 7 with a molding die. In this state, the material is filled in the molding die and solidified to be joined to the side end face 8 simultaneously with molding.
[0005]
[Problems to be solved by the invention]
However, in the case of the conventional weatherstrip (glass run 1), a gap is generated between the molding die and the side end surface 8 at the time of molding due to a variation in molding of the side end surface 8. For this reason, burrs 9 as shown in FIGS. 5 and 6 are generated at the end portions of the molded portions (the deformed moldings 5 and 6).
[0006]
If the weather strip (glass run 1) is used without removing the burr 9 as it is, the burr 9 is caught in the door panel flange 10 (see FIG. 6) at the time of assembling the door parts. In addition to causing a reduction in assembling workability, the application of an external force to the burr 9 portion tends to cause peeling (tearing) of the molded portion (the deformed moldings 5, 6).
[0007]
Therefore, in the conventional weatherstrip (glass run 1), it is necessary to perform a deburring operation after the molding. However, since the deburring operation is complicated, the production efficiency is likely to be reduced, and the deburring operation is difficult. There is a possibility that the molded portions (deformed moldings 5 and 6) may be peeled off from the side end surfaces 8 by external force.
[0008]
Therefore, the invention of this application is intended to improve the production efficiency by eliminating the deburring, preventing the workability of assembling the peripheral parts due to the biting of the burr, and preventing the peeling of the molded part through the burr. An object of the present invention is to provide a weather strip for a vehicle that can prevent the occurrence of defective products.
[0009]
[Means for Solving the Problems]
As means for solving the above-described problems, the invention of this application is based on the fact that a side end face formed along the extrusion direction at the time of molding of the extruded part, or a part of the cross section of the extruded part is formed in the longitudinal direction after molding. In a vehicle weatherstrip in which a molded portion having an irregular cross-section is simultaneously formed and joined to a side end surface cut and formed along, a terminal portion of the molded portion of the side end surface of the extruded portion is located. At the portion, a material flows into the mold during molding, and a concave portion is formed in which a terminal portion of the molded portion is formed over a part thereof.
[0010]
In the case of the present invention, since the terminal portion of the molded portion is formed so as to straddle a part of the concave portion of the side end surface, even if burrs may occur at the mating portion between the molding die and the side end surface during molding, the The burrs will be located inside the recess.
[0011]
The recess is desirably formed to have a curved cross-sectional shape. In such a case, the generated burrs follow the inner surface of the recess and are easily maintained in a close contact state. Therefore, the problem that the burr jumps out of the recess does not occur.
[0012]
Further, the concave portion may be curved so as to be deviated in a direction in which the material flows out from a gap between the mold and the side end surface. In this case, the area where the burrs can be brought into close contact with each other in the concave portion is increased, and the burrs are less likely to protrude from the concave portion.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the invention of this application will be described with reference to FIGS.
[0014]
The weather strip of this embodiment is a glass run 11 attached from a window frame of a vehicle door to a glass guide inside the door. FIGS. 1 and 2 show a front view of a portion corresponding to a portion A or B in FIG. It is a figure and a partially broken perspective view.
[0015]
The glass run 11 has a basic cross section formed by extrusion molding like the conventional glass run. The basic cross section has a substantially U-shaped main body section 12 for guiding a side edge of a door glass, and a side wall of the main body section 12. And a lip-shaped outer molding 13 and an inner molding 14 that extend from the front end to the vehicle exterior and the vehicle interior, respectively, and cover the terminal of the door panel. In the region below the vicinity of the door waist portion of the extruded portion 15, the root portions of the outer molding 13 and the inner molding 14 are cut out along the longitudinal direction after the extrusion molding, and the extruded portion 15 is cut off near the door waist portion. On the side end surfaces 16a and 16b, deformed moldings 17 and 18 (molded portions in the invention of the present application) which are curved along the door waist are respectively joined by molding at the same time.
[0016]
In the case of this embodiment, the characteristic configuration of the invention of the present application is adopted in the joint between the extruded portion 15 and the deformed molding 17 on the inner side of the joint between the deformed moldings 17 and 18. That is, a curved concave portion 19 (in this embodiment, a semicircular cross section in this embodiment) is provided at a portion of the inner side end surface 16b of the extruded portion 15 where the terminal portion 18a below the deformed molding 18 is located. Is formed, and at the time of molding, the material flows into the vicinity of substantially the center of the concave portion 19, and the terminal portion 18 a of the deformed molding 18 is formed over a part of the concave portion 19.
[0017]
When molding the deformed moldings 17, 18, the extruded portion 15 from which the outer molding 13 and the inner molding 14 have been cut is set in a molding die, and the base material (extrusion molding portion 15) insertion opening of the molding die is extruded. The protrusion 15 is brought into close contact with the side end surfaces 16a and 16b of the portion 15, and a projection is provided at a portion corresponding to the recess 19 of the base material insertion opening of the mold so as to be closely engaged with a substantially half portion of the inner surface of the recess 19. I have.
[0018]
As described above, in the glass run 11 of this embodiment, the concave portion 19 is formed in the portion of the extruded portion 15 where the end portion 18a of the deformed molding 18 is located on the side end surface 16b after the excision. Since the terminal portion 18a is formed over a part of the concave portion 19, the material leaks from a gap between the molding die and the side end surface 16b (the inner surface of the concave portion 19) at the time of molding the deformed molding 18, and the molded portion 18 Even if burrs 20 are generated, the burrs 20 are located in the concave portions 19 as shown in FIGS. Therefore, since the burr 20 is not exposed outside the general portion (the edge portion of the concave portion 19) of the side end surface 16b of the extruded portion 15, it is possible to assemble the door parts without special deburring. There is no problem that hinders or causes partial separation of the deformed molding 18.
[0019]
That is, when the burr 20 is exposed outside the general portion of the side end face 16b after the cutting, the burr 20 is attached to a peripheral component, for example, the flange portion 21 of the door panel shown in FIG. In the structure of the glass run 11, such troubles as being caught and hindering the assembling work itself and tearing of the joint portion of the deformed molding 18 due to external force acting on the burr 20 occur. No trouble occurs at all. In this embodiment, since the concave portion 19 of the extruded portion 15 is located on the inner side of the vehicle and covered by a door trim (not shown), there is no problem that the appearance is impaired.
[0020]
Further, in the glass run 11, since the deburring operation can be eliminated, the production efficiency can be improved, and the occurrence of defective products can be reduced because the deformed molding 18 does not peel off due to the deburring operation. be able to.
[0021]
The concave portion 19 formed in the side end surface 16b after the excision is not limited to the curved shape as long as the generated burr 20 is not exposed to the outside from the general portion of the side end surface 16b. However, when the burr 20 is formed in a curved shape as in this embodiment, the generated burr 20 can follow the inner surface of the concave portion 19 so as to be in close contact with the inner surface of the concave portion 19, so that the tip of the burr 20 can be prevented from jumping up. . Therefore, it is possible to further reduce the possibility that the tip of the burr 20 comes into contact with a surrounding member or the hand of an operator, and to further secure the above-described effect.
[0022]
Furthermore, if the shape of the concave portion 19 is formed into a curved shape knitted in the material flowing direction (growth direction of the burr 20) as shown in FIG. It is possible to secure a large size and to more reliably prevent the burr 20 from jumping out of the concave portion 19.
[0023]
By the way, various resins and rubber materials can be adopted as the material of the molded portion (the deformed molding 18 in the above example). However, in the weather strip according to the present application, the burr 20 is generated as described above. Therefore, a lightweight and highly fluid TPE (thermoplastic elastomer) or the like can be used to reduce the weight and reduce the product cost.
[0024]
The embodiment of the invention of this application is not limited to the one described above. For example, in the above embodiment, the same structure as the inner side may be adopted in the outer side deformed molding 17 portion, The weather strip is not limited to the glass run 11, but may be used for other parts of the vehicle such as the body side.
[0025]
In the above-described embodiment, a molded part (deformed molding 17) having a modified cross-section is joined to a side end face (16b) obtained by cutting off a part of the basic cross-section of the extruded part simultaneously with molding. The present invention can be similarly applied to a case where a molded part having a deformed cross section is directly joined to a side end face formed along the extrusion direction at the time of molding of the molded part at the same time as molding.
[0026]
【The invention's effect】
As described above, according to the invention of this application, since the terminal portion of the molded portion is formed so as to straddle a part of the concave portion on the side end surface, the burr of the terminal portion of the molded portion is located in the concave portion. As a result, even without deburring, it is possible to eliminate the problem that the burrs are bitten by peripheral parts during assembly and that the molded part is peeled off due to external force acting on the burrs. .
[Brief description of the drawings]
FIG. 1 shows an embodiment of the invention of this application, and is a front view taken along the arrow D in FIG.
FIG. 2 shows the same embodiment, and is a partially broken perspective view of a portion corresponding to a portion A or a portion B in FIG.
FIG. 3 is a front view similar to FIG. 2, showing another embodiment of the present invention;
FIG. 4 is a side view showing an example of a weather strip (glass run).
FIG. 5 is a partially cutaway perspective view of a portion corresponding to a portion A or B in FIG. 4 showing a conventional technique.
FIG. 6 is a front view as viewed in the direction of the arrow C in FIG.
[Explanation of symbols]
11 ... Glass run (weather strip)
15: Extruded part 16b: Side end face 18: Deformed molding (molded part)
18a ... Terminal part 19 ... Recess 20 ... Burr

Claims (3)

A side end surface formed along the extrusion direction at the time of molding of the extruded part, or a side end surface formed by cutting a part of the cross section of the extruded part along the longitudinal direction after molding, a molded part having an irregular cross section In the weather strip for vehicles that was joined at the same time as molding,
At the part of the side end surface of the extruded part where the terminal part of the molded part is located, a material flows in at the time of molding, and a concave part where the terminal part of the molded part is formed over a part thereof is provided. A weather strip for a vehicle, comprising: The weatherstrip for a vehicle according to claim 1, wherein the concave portion is formed in a curved cross-sectional shape. The vehicle weather strip according to claim 2, wherein the concave portion is curved so as to be deviated in a direction in which the material flows out from a gap between the forming die and the side end surface.

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