Opening trim weather-strip

Abstract

To provide a resin opening trim weather-strip that has improved resistance to settling and satisfies both ease of assembly to a flange and retention.MEANS FOR SOLVING THE PROBLEM: A resin opening trim weather-strip 10 includes: a vehicle exterior side wall 23; a vehicle interior side wall 22; a mounting base 20 having a substantially U-shaped cross section and consisting of a bottom wall 21 that connects the vehicle exterior side wall 23 and the vehicle interior side wall 22; a hollow seal part 24 integrated with the vehicle exterior side wall 23 of the mounting base 20; and a lip part 30 extending obliquely from a vehicle exterior side surface of the vehicle interior side wall 22 toward the vehicle exterior side wall 23 and toward the bottom wall 21. The resin opening trim weather-strip is attached to a flange 5 of a vehicle body by the vehicle exterior side wall 23 and the lip part 30. The lip part 30 includes a soft part 31 formed of a soft resin having a lower hardness than the mounting base 20, and a hard part 32 having a hardness equal to or greater than that of the mounting base 20.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a resin opening trim weatherstrip that is disposed in an opening that is opened and closed by an automobile door or the like and is attached to a flange formed on the periphery of the opening. [Background technology]

[0002] In recent years, with the growing need for carbon neutrality, there has been a demand to switch from rubber to resin components for weatherstrips, including opening trim weatherstrips, in order to reduce the carbon dioxide emissions generated during the production of automotive rubber parts.

[0003] For example, Figure 5 discloses an opening trim weatherstrip 100 that is attached to a flange 500 of a vehicle body, and that includes an attachment base 200 having a generally U-shaped cross section and consisting of an exterior side wall 230, an interior side wall 220, and a bottom wall 210 connecting the exterior side wall 230 and the interior side wall 220, a hollow seal 240 portion that is integrated with the exterior side wall 230 of the attachment base 200, and an interior retaining lip portion 300 (lip portion) that extends obliquely from the exterior surface of the interior side wall 220 toward the exterior side wall 230 and toward the bottom wall 210 (Patent Document 1).

[0004] In the opening trim weatherstrip 100 of Patent Document 1, it is described that the mounting base 200 is preferably formed from synthetic rubber or thermoplastic elastomer with an International Rubber Hardness (IRHD) of 70 to 90 degrees.

[0005] FIG. 6 also shows that the tailgate opening trim 101 comprises a main body 103 attached to a body panel 102 (flange), cantilever-shaped seal portions 105 and 107 that seal gaps in the body panel 102, and a hollow cylindrical seal portion 106, and the seal portions 105, 106, and 107 elastically contact the body panel 102 when attached to the body panel 102, and that the seal portions 105, 106, and 107 are molded from a thermoplastic elastomer containing an olefin block copolymer (Patent Document 2). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-196054 [Patent Document 2] Japanese Patent Application Publication No. 2018-132097 Summary of the Invention [Problem to be solved by the invention]

[0007] When attaching an opening trim weatherstrip to a flange, it must be easy to insert into the flange (assembly), and once attached, it must be difficult to remove from the flange (retention). For example, if the opening trim weatherstrip in Fig. 5 (Patent Document 1) is changed from rubber to a thermoplastic elastomer, the thermoplastic elastomer tends to set more easily than rubber, that is, its recovery force tends to decrease when dynamic or static compression is applied for a certain period of time, and also the interior holding lip portion 300 has little flexibility in the reversing direction when force is applied to the flange 500 in a direction that would cause it to come off, that is, the interior holding lip portion 300 itself has little strength, increasing the possibility that the mounting base 200 will come off the flange 500. Furthermore, although Patent Document 2 describes the material, the structure and shape also need to be considered. [Means for solving the problem]

[0008] The present invention provides a resin opening trim weatherstrip that has improved resistance to settling, and that satisfies both good mounting properties and retention properties on a flange, through improvements in particular in structure and shape.

[0009] In order to solve the above-mentioned problems, a first aspect of the present invention is a resin opening trim weatherstrip comprising: an exterior side wall, an interior side wall, a mounting base having a generally U-shaped cross section and consisting of a bottom wall connecting the exterior side wall and the interior side wall; a hollow seal portion integrated with the exterior side wall of the mounting base; and a lip portion extending obliquely from the exterior surface of the interior side wall toward the exterior side wall and toward the bottom wall, the resin opening trim weatherstrip being attached to a flange of a vehicle body by the exterior side wall and the lip portion, wherein the lip portion is thick on the bottom wall side except for the connecting portion with the interior side wall and the abutting portion with the flange.

[0010] Here, the "connection portion between the lip portion and the interior side wall" refers to the portion that deforms when the lip portion is tilted toward the interior side wall when the mounting base is attached to the flange, and the "contact portion with the flange" refers to the tip of the lip portion that is slightly bent and contacts the flange when the mounting base is attached to the flange.

[0011] In a first aspect of the present invention, the lip portion is thickened on the bottom wall side, excluding the connecting portion with the interior side wall and the abutting portion with the flange, which increases the pressing force of the lip portion against the flange after installation, suppressing the increase in sagging over time, and if a force is applied to the flange in a direction that would cause it to come off, the entire lip portion is compressed, and the reaction force of the compression increases the pressing force of the lip portion against the flange, preventing the mounting base from falling off the flange. As a result, good retention can be ensured for the resin opening trim weatherstrip.

[0012] Furthermore, since the connecting portion with the vehicle interior side wall and the abutment portion with the flange are not formed thick, deformation of the connecting portion with the vehicle interior side wall when attaching the lip portion to the flange and deformation of the tip portion of the lip portion when abutting with the flange can be tolerated to the same extent as in the conventional case, ensuring good assembly performance with the flange.

[0013] A second aspect of the present invention is a resin opening trim weatherstrip comprising: an exterior side wall, an interior side wall, a mounting base having a generally U-shaped cross section and consisting of a bottom wall connecting the exterior side wall and the interior side wall; a hollow seal portion integrated with the exterior side wall of the mounting base; and a lip portion extending obliquely from the exterior surface of the interior side wall toward the exterior side wall and toward the bottom wall, the resin opening trim weatherstrip being attached to a flange of a vehicle body by the exterior side wall and the lip portion, wherein the lip portion comprises a soft portion formed of a soft resin having a lower hardness than the mounting base, and a hard portion having a hardness equal to or greater than that of the mounting base.

[0014] In a second aspect of the present invention, the lip portion includes a soft portion made of a soft resin having a lower hardness than the mounting base portion, and a hard portion having a hardness equal to or greater than that of the mounting base portion. The hard portion increases the pressing force of the lip portion against the flange after mounting, suppressing the increase in settling over time and preventing the mounting base portion from falling off the flange. As a result, good retention can be ensured for the resin opening trim weatherstrip.

[0015] Furthermore, since the portion other than the hard portion is formed of a soft portion that is lower in hardness than the mounting base portion, the flexibility required for the lip portion, such as bending, can be ensured.

[0016] A third aspect of the present invention is the opening trim weatherstrip of the second aspect, wherein the hard portion in the lip portion is not formed in a connecting portion between the lip portion and the vehicle interior side wall and an abutting portion with the flange.

[0017] Here, the "connecting portion between the lip portion and the vehicle interior side wall" and the "contact portion with the flange" are the same as those in the first aspect.

[0018] In a third aspect of the present invention, the hard portion of the lip portion is not formed at the connection portion between the lip portion and the vehicle interior side wall and the abutment portion with the flange. Therefore, when the lip portion is attached to the flange, the connection portion with the vehicle interior side wall is easily deformed, and when the lip portion abuts with the flange, the abutment portion of the lip is easily deformed, so that it is possible to maintain good assemblability and retention with respect to the flange.

[0019] A fourth aspect of the present invention is a resin opening trim weatherstrip according to the second and third aspects, wherein the hard portion is formed on the bottom wall side of the lip portion. When the lip portion is attached to the flange, the lip portion deforms convexly toward the flange. In this case, in the fourth aspect of the present invention, since the hard portion is formed on the bottom wall side of the lip portion, a soft portion is present on the flange side of the portion where the hard portion is formed, and the lip portion does not be impeded from deforming convexly toward the flange. Furthermore, since the hard portion is compressed, a reaction force against the compression acts on the hard portion, applying a force pressing the lip portion toward the flange. As a result, the pressing force of the lip portion against the flange after attachment to the flange is increased, and the increase in sag over time can be suppressed, thereby preventing the mounting base from falling off the flange.

[0020] A fifth aspect of the present invention is the resin opening trim weatherstrip of the fourth aspect, wherein a recess is formed in the soft portion between the vehicle interior side wall and the hard portion, such that the thickness is greater on the vehicle interior side wall side and the hard portion side.

[0021] In a fifth aspect of the present invention, a recess is formed in the soft portion between the interior side wall and the hard portion, so that the thickness is greater on the interior side wall side and the hard portion side, which makes it easier for the lip portion to deform so as to collapse toward the interior side wall when attaching the lip portion to the flange. As a result, the effect of the hard portion is maintained and the opening trim weatherstrip can be easily assembled to the flange.

[0022] A sixth aspect of the present invention is a resin opening trim weatherstrip according to any one of the second to fifth aspects, wherein the hard portion occupies 50% to 80% of the cross-sectional area of ​​the lip portion. In the sixth aspect of the present invention, the hard portion occupies 50% to 80% of the cross-sectional area of ​​the lip portion, so that it is possible to achieve both an increase in the pressing force of the hard portion against the flange and deformation of the lip portion toward the vehicle interior side wall when attaching the lip portion to the flange and deformation of the contact portion with the flange due to the soft portion. As a result, the opening trim weatherstrip can be easily attached to the flange and retained, and can be prevented from falling off the flange over time.

[0023] If the hard portion accounts for less than 50% of the cross section of the lip, the above effect is weakened, which is undesirable. On the other hand, if the hard portion accounts for more than 80%, deformation of the lip toward the vehicle interior side wall when attaching the lip to the flange and deformation of the contact portion with the flange are hindered, which is undesirable because it reduces assembly workability.

[0024] A seventh aspect of the present invention is the opening trim weatherstrip made of resin in any one of the second to sixth aspects, wherein a convex portion having a greater thickness is formed on the bottom wall side of the lip.

[0025] In a seventh aspect of the present invention, a protrusion having a greater thickness is formed on the bottom wall side of the lip, which increases the pressing force of the lip against the flange, thereby preventing the opening trim weatherstrip from falling off the flange over time when attached to the flange.

[0026] An eighth aspect of the present invention is a resin opening trim weatherstrip lip according to any one of the first to seventh aspects, wherein a sloped portion is formed at the tip of the lip portion on the vehicle exterior sidewall side, and when the opening trim weatherstrip is attached to the flange, the angle between the sloped portion and the flange is less than 30 degrees.

[0027] Here, "the angle between the inclined portion and the flange when the opening trim weatherstrip is attached to the flange" refers to the angle between the flange and the inclined portion when the opening trim weatherstrip is attached to the flange and then returned to the state before the lip portion abutted against the flange.

[0028] In an eighth aspect of the present invention, an inclined portion is formed at the tip portion of the lip portion on the vehicle exterior sidewall side, and the angle between the inclined portion and the flange when the opening trim weatherstrip is attached to the flange is less than 30 degrees, so that the entire surface of the inclined portion abuts against the flange when the opening trim weatherstrip is attached to the flange. As a result, when a force is applied to the flange in a direction that would cause the opening trim weatherstrip to come off, the inclined portion, the entire surface of which abuts against the flange, can increase the bracing force of the lip portion itself, thereby preventing the mounting base from falling off the flange. [Effects of the Invention]

[0029] a mounting base having a generally U-shaped cross section and consisting of an exterior side wall, an interior side wall, a bottom wall connecting the exterior side wall and the interior side wall, a hollow seal portion integrated with the exterior side wall of the mounting base, and a lip portion extending obliquely from the exterior surface of the interior side wall toward the exterior side wall and toward the bottom wall, the resin opening trim weatherstrip being attached to a flange of a vehicle body by the exterior side wall and the lip portion, wherein the lip portion is thick on the bottom wall side except for the connecting portion with the interior side wall and the abutting portion with the flange, thereby increasing the pressing force of the lip portion against the flange during installation and suppressing increase in sagging over time, and also when a force is applied to the flange in a direction that would cause it to come off the flange, the entire lip portion is compressed and the pressing force of the lip portion against the flange is increased by the reaction force of the compression, thereby preventing the mounting base from falling off the flange. Furthermore, since the connecting portion with the vehicle interior side wall and the abutment portion with the flange are not formed thick, deformation of the connecting portion with the vehicle interior side wall when attaching the lip portion to the flange and deformation of the tip portion of the lip portion when abutting with the flange can be tolerated to the same extent as in the conventional case, ensuring good assembly and retention properties with respect to the flange.

[0030] a mounting base having a generally U-shaped cross section consisting of an exterior side wall, an interior side wall, and a bottom wall connecting the exterior side wall and the interior side wall; a hollow seal portion integrated with the exterior side wall of the mounting base; and a lip portion extending diagonally from the exterior surface of the interior side wall toward the exterior side wall and toward the bottom wall, the resin opening trim weatherstrip being attached to a flange of a vehicle body by the exterior side wall and the lip portion, wherein the lip portion has a soft portion formed of a soft resin having a lower hardness than the mounting base, and a hard portion having a hardness equal to or greater than that of the mounting base, and the hard portion increases the pressing force of the lip portion against the flange during installation, thereby suppressing increase in sagging over time and preventing the mounting base from falling off the flange. [Brief explanation of the drawings]

[0031] [Figure 1] 1 is a perspective view of a vehicle as seen from the rear with the door open. FIG. [Figure 2] 1 is a front view of a resin opening trim weatherstrip according to an embodiment of the present invention; [Figure 3] 1 is a cross-sectional view illustrating the positional relationship between a resin opening trim weatherstrip and a flange according to a first embodiment of the present invention. [Figure 4] FIG. 6 is a cross-sectional view illustrating the positional relationship between a resin opening trim weatherstrip and a flange according to a second embodiment of the present invention. [Figure 5] FIG. 1 is a cross-sectional view illustrating the positional relationship between a conventional opening trim weatherstrip and a flange (Patent Document 1). [Figure 6] FIG. 1 is a cross-sectional view of a conventional back door opening trim weather strip (Patent Document 2). DETAILED DESCRIPTION OF THE INVENTION

[0032] A resin opening trim weatherstrip according to a first embodiment of the present invention will be described with reference to Figures 1 to 3. Figure 1 is a perspective view of an automobile door as seen from the rear, with the door open. A body 2 of the automobile 1 has a door opening which is opened and closed by a door 3. The periphery of the door opening forms a body opening periphery 4, which is provided with flanges 5 (Figures 3 and 4) of an outer panel 6, an inner panel 7, etc. which constitute the body 2. An opening trim weatherstrip 10 is attached to the flange 5.

[0033] 2 is a front view of a resin opening trim weatherstrip according to an embodiment of the present invention. The opening trim weatherstrip 10 is formed into a linear shape by extrusion molding, and after being cut to a predetermined length, is attached to the flange 5 while forming a linear portion 11 and corner portions 12 so as to form a ring that follows the shape of the periphery 4 of the vehicle opening. After attachment, both ends are connected by a connecting portion 13.

[0034] FIG. 3 is a cross-sectional view illustrating the positional relationship between the resin opening trim weatherstrip and the flange according to the first embodiment. The opening trim weatherstrip 10 includes a mounting base 20 having a generally U-shaped cross section and including an exterior side wall 23, an interior side wall 22, and a bottom wall 21 connecting the exterior side wall 23 and the interior side wall 22. It also includes a hollow seal portion 24 integrated with the exterior side wall 23 of the mounting base 20. A lip portion 30 extends obliquely from the exterior surface of the interior side wall 22 toward the exterior side wall 23 and toward the bottom wall 21. An insert member 25 is embedded within the mounting base 20 to increase the gripping strength of the flange 5. The insert member 25 is made of sheet metal or hard resin. Ribs 26 are formed at three locations on the exterior side wall 23 facing the interior side wall 22. The mounting base 20 of the opening trim weatherstrip 10 is attached to the flange 5 including the outer panel 6 and the inner panel 7. At this time, the rib 26 comes into elastic contact with the outer panel 6, and the lip portion 30 comes into elastic contact with the inner panel 7.

[0035] In this first embodiment, the mounting base 20 and lip portion 30 of the opening trim weatherstrip 10 use TPV (dynamic crosslinked thermoplastic elastomer) with an IRHD (International Rubber Hardness) of 80±10, and the hollow seal portion 24 and rib 26 use soft TPV with an IRHD of 40±10. Note that the resin that makes up the opening trim weatherstrip 10 may be a TPE (thermoplastic elastomer) other than TPV, such as TPS (styrene-based thermoplastic elastomer) or TPO (olefin-based thermoplastic elastomer).

[0036] Thermoplastic elastomers have the properties of both resin and rubber, and are suitable for producing weatherstrips, including opening trim weatherstrips, from the standpoints of weather resistance, recyclability, cost, etc. Other resins such as PE (polyethylene) and PP (polypropylene) can also be used.

[0037] The lip portion 30 has a protrusion 34 that is approximately 15% thicker in the center than the conventional thickness, that is, the shape of the lip portion 30 when the bottom wall 21 side and the opposite side to the bottom wall 21 side are formed approximately parallel (the broken line in FIG. 3, the interior holding lip portion 300 in Patent Document 1). Note that it is desirable to form the protrusion 34 10% to 20% thicker than the conventional thickness. If it is less than 10%, the effect is weak, and if it exceeds 20%, it becomes difficult for the lip portion 30 to deform, and the variability when force is applied in the direction of removal from the flange 5 decreases, reducing the effect, which is undesirable.

[0038] Furthermore, the tip portion of the lip portion 30 tapers toward the vehicle exterior sidewall 23, and an inclined portion 37 is formed on the vehicle exterior sidewall 23 side. When the mounting base 20 is inserted into the flange 5, the vehicle exterior sidewall 23 side of the lip portion 30 abuts against the flange 5, and the base side of the convex portion 34 where it joins with the vehicle interior sidewall 22, i.e., the connecting portion 35, deforms so as to tilt toward the vehicle interior sidewall 22, and the lip portion 30 is inserted while slightly deforming into a convex shape toward the vehicle exterior sidewall 23. Furthermore, when insertion is complete, the tapered tip portion bends slightly toward the bottom wall 21 and abuts against the flange 5, forming an abutment portion 36.

[0039] In Figure 3, which shows the state after the opening trim weatherstrip 10 has been attached to the flange 5, returned to the state before the lip portion 30 abutted against the flange 5, the angle between the flange 5 and the inclined portion 37 is 24 degrees. Note that it is desirable that the angle between the flange 5 and the inclined portion 37 be less than 30 degrees.

[0040] When the angle between the flange 5 and the inclined portion 37 was changed from 33 degrees in the current product to 24 degrees and the removal force (the tension strength of the lip portion 30 itself) required to remove the lip portion 30 from the flange 5 was compared, it was found that at 24 degrees the removal force of the lip portion 30 increased by approximately 1.25 times compared to 33 degrees. Therefore, by reducing the angle, the removal force of the lip portion 30 increases.

[0041] This is thought to be because when the opening trim weatherstrip 10 is attached to the flange 5, the entire surface of the inclined portion 37 abuts against the flange 5, i.e., the abutment portion 36 becomes the entire surface of the inclined portion 37, and as a result, when a force is applied to the flange 5 in the direction of removal, the inclined portion 37, whose entire surface abuts against the flange 5, increases the bracing force of the lip portion 30 itself.

[0042] Furthermore, by making the thickness of the connecting portion 35 of the lip portion 30 slightly thinner, it becomes easier for the lip portion 30 to collapse toward the vehicle interior side wall 22 and to deform convexly toward the vehicle exterior side wall 23.

[0043] Next, a second embodiment of the present invention will be described with reference to Fig. 4. Fig. 4 is a cross-sectional view showing a resin opening trim weatherstrip 10 according to the second embodiment of the present invention attached to a straight portion of a flange 5.

[0044] The second embodiment differs from the first embodiment in the lip portion 30. Therefore, the mounting base 20, hollow seal portion 24, rib 26, and flange 5 are the same as those in the first embodiment, and therefore description thereof will be omitted.

[0045] In the second embodiment, the lip portion 30 is formed from a soft portion 31 made of a soft resin having a lower hardness than the mounting base 20, and a hard portion 32 having a higher hardness than the mounting base 20. The hardness of the hard portion 32 may be the same as that of the mounting base 20.

[0046] The soft part 31 uses soft TPS (styrene-based thermoplastic elastomer) with an IRHD of 35. The mounting base 20 uses TPV with an IRHD (International Rubber Hardness Scale) of 80±10, and the hard part 32 uses TPV with an IRHD (International Rubber Hardness Scale) of 90±10.

[0047] The resin constituting the lip portion 30 may be the same as that of the mounting base portion 20, for example, TPV, or a TPE (thermoplastic elastomer) other than TPV or TPS may be used. Also, other resins may be used.

[0048] In the lip portion 30 , the hard portion 32 is not formed in a connecting portion 35 between the lip portion 30 and the vehicle interior side wall 22 and an abutting portion 36 between the flange 5 .

[0049] Furthermore, the thickness of the lip portion 30, i.e., the width between the bottom wall 21 side and the side opposite to the bottom wall 21, is formed to be approximately 25% thicker than in the first embodiment. This is because, with the use of the soft portion 31 in the connecting portion 35, it is possible to prevent the lip portion 30 from falling too far toward the vehicle interior side wall 22 when the mounting base 20 is attached to the flange 5, and to prevent the pressing force of the lip portion 30 against the flange 5 from decreasing too much.

[0050] The hard portion 32 is formed so as to be exposed on the bottom wall 21 side of the lip portion 30, and the soft portion 31 is present on the side opposite to the bottom wall 21.

[0051] In addition, in the lip portion 30, a recess 33 is formed in the soft portion 31 between the interior side wall 22 and the hard portion 32, where the thickness is greater on the interior side wall 22 side than on the hard portion 32 side. The recess 33 corresponds to a connecting portion 35 between the lip portion 30 and the interior side wall 22, and corresponds to a deformed portion when the lip portion 30 deforms so as to fall toward the interior side wall 22 when the mounting base 20 is attached to the flange 5.

[0052] Furthermore, on the bottom wall 21 side of the lip portion 30, a protrusion 34 is formed that is about 15% thicker than when the protrusion 34 is not formed on the bottom wall 21. It is desirable that the thickness of the protrusion 34 is 10 to 20% thicker than when the protrusion 34 is not formed. If the thickness is less than 10%, the effect is reduced, and if it exceeds 20%, it is undesirable because the lip portion 30 becomes difficult to deform.

[0053] Moreover, the hard portion 32 occupies 75% of the area of ​​the lip portion 30 in the cross-sectional view of FIG.

[0054] The tip of the lip portion 30 is tapered toward the vehicle exterior side wall 23. The tapered inclined portion corresponds to the abutment portion 36 that abuts against the vehicle interior side of the inner panel 7. The angle between the flange 5 and the inclined portion 37 is 24 degrees, the same as in the first embodiment.

[0055] When the mounting base 20 is inserted into the flange 5, the recess 33 of the lip 30, i.e., the connecting portion 35, is deformed so as to fall toward the interior side wall 22. When the insertion is complete, the abutment portion 36 of the lip 30 is bent slightly and abuts against the flange 5.

[0056] As described above in detail, according to this embodiment, the following effects can be obtained. (1) In the first embodiment, the resin opening trim weatherstrip 10 uses TPV (dynamic crosslinked thermoplastic elastomer), and the lip portion 30 has a protrusion 34 formed approximately 15% thicker at the center than conventional thicknesses. This increases the pressing force of the lip portion 30 against the flange 5 after installation, suppressing the increase in settling over time. Furthermore, when a force is applied to the flange 5 in a direction that would cause the lip portion 30 to come off, the entire lip portion 30 is compressed, and the reaction force of the compression increases the pressing force of the lip portion 30 against the flange 5, preventing the mounting base 20 from falling off the flange 5. Furthermore, the connecting portion 35 with the interior side wall 22 and the abutting portion 36 with the flange 5 are not thickened, so deformation of the connecting portion with the interior side wall when the lip portion is installed to the flange and deformation of the tip portion of the lip portion when abutting against the flange can be maintained to the same extent as conventional, thereby ensuring good assembly and retention to the flange.

[0057] (2) In the second embodiment, the resin opening trim weatherstrip 10 uses TPV (dynamic crosslinked thermoplastic elastomer) and TPS (styrene-based thermoplastic elastomer), and the lip portion 30 has a soft portion 31 formed of a soft resin having a lower hardness than the mounting base 20, and a hard portion 32 having a higher hardness than the mounting base 20. Therefore, the hard portion 32 increases the pressing force of the lip portion 30 against the flange 5 during installation, suppressing the increase in sagging over time and preventing the mounting base 20 from falling off the flange 5. Furthermore, since the portion other than the hard portion 32 is formed of the soft portion 31 which is lower in hardness than the mounting base 20, the flexibility required for the lip portion 30, such as bending, can be ensured.

[0058] (3) In the second embodiment, the hard portion 32 of the lip portion 30 is not formed in the connecting portion 35 between the lip portion 30 and the vehicle interior side wall 22 and the abutting portion 36 with the flange 5. Therefore, when the lip portion 30 is attached to the flange 5, the connecting portion 35 with the vehicle interior side wall 22 is easily deformed, and when the lip portion 30 abuts against the flange 5, the abutting portion 36 of the lip portion 30 is easily deformed, thereby ensuring good assembly and retention with respect to the flange 5.

[0059] (4) In the second embodiment, the hard portion 32 is formed on the bottom wall 21 side of the lip portion 30, and therefore the soft portion 31 is present on the flange 5 side of the portion where the hard portion 32 is formed, and does not prevent the lip portion 30 from deforming into a convex shape toward the flange 5. In addition, because the hard portion 32 is compressed, a reaction force against the compression acts on the hard portion 32, and a force is applied to press the lip portion 30 toward the flange 5. This increases the pressing force of the lip portion 30 against the flange 5 when attached to the flange 5, and can suppress an increase in sagging over time, thereby preventing the mounting base 20 from falling off the flange 5.

[0060] (5) In the second embodiment, the soft portion 31 between the interior side wall 22 and the hard portion 32 has a recess 33 formed therein, in which the thickness is greater on the interior side wall 22 side than on the hard portion 32 side. This makes it easier for the lip portion 30 to deform so as to collapse toward the interior side wall 22 when attaching the lip portion 30 to the flange 5. As a result, the opening trim weatherstrip 10 can be easily assembled to the flange 5 while retaining the effect of the hard portion 32.

[0061] (6) In the second embodiment, the hard portion 32 occupies 75% of the cross-sectional area of ​​the lip portion 30, which makes it possible to achieve both an increase in the pressing force of the hard portion 32 on the flange 5 and deformation of the lip portion 30 toward the interior side wall 22 when attaching the lip portion 30 to the flange 5, and deformation of the abutting portion 36 with the flange 5, due to the soft portion 31. As a result, when attaching the opening trim weatherstrip 10 to the flange 5, it is possible to prevent the opening trim weatherstrip 10 from falling off the flange 5 over time, ensuring good assemblability and retention.

[0062] (7) Furthermore, in the second embodiment, the thickness of the lip portion 30 is made approximately 25% thicker than that of the first embodiment described above. Therefore, by using the soft portion 31 in the connecting portion 35, it is possible to prevent the lip portion 30 from falling too far toward the vehicle interior side wall 22 when attaching the mounting base 20 to the flange 5, and to prevent the pressing force of the lip portion 30 on the flange 5 from decreasing too much.

[0063] (8) In the first and second embodiments, the tip portion of the lip portion 30 tapers toward the vehicle exterior sidewall 23, and an inclined portion 37 is formed on the vehicle exterior sidewall 23 side. In Figures 3 and 4, by making the angle between the flange 5 and the inclined portion 37 less than 30 degrees, when the opening trim weatherstrip 10 is attached to the flange 5, the entire surface of the inclined portion 37 can abut against the flange 5 as the abutment portion 36. As a result, when a force is applied to the flange 5 in a direction that causes it to come off, the bracing force of the lip portion 30 itself can be increased, and the mounting base 20 can be prevented from falling off the flange 5.

[0064] The present invention further includes the following in relation to claim 6 of the claims: 6. The resin opening trim weatherstrip according to claim 4, wherein the hard portion occupies 50% to 80% of the cross section of the lip portion.

[0065] Furthermore, claim 7 of the claims further includes the following: 7. The opening trim weatherstrip according to claim 4, wherein a convex portion having a greater thickness is formed on the bottom wall side of the lip portion.

[0066] Furthermore, claim 8 of the claims further includes the following: 8. The resin opening trim weatherstrip according to claim 3, wherein an inclined portion is formed at the tip portion of the lip portion on the vehicle exterior side wall side, and when the opening trim weatherstrip is attached to the flange, the entire surface of the inclined portion abuts against the flange.

[0067] The present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the object of the present invention. [Explanation of symbols]

[0068] 5 flange 10 Opening trim weatherstrip 20 Mounting base 21 Bottom wall 22 Inner side wall 30 Lip 31 Soft part 32 Hard part 33 Recess 34 Convex part 35 Connecting part 36 Contact part 37 Slope

Claims

1. a mounting base having a generally U-shaped cross section and including an exterior side wall, an interior side wall, a bottom wall connecting the exterior side wall and the interior side wall, a hollow seal portion integrated with the exterior side wall of the mounting base, and a lip portion extending obliquely from an exterior surface of the interior side wall toward the exterior side wall and toward the bottom wall, wherein the resin opening trim weatherstrip is attached to a flange of a vehicle body by the exterior side wall and the lip portion, The lip portion is formed thicker on the bottom wall side, except for a connecting portion with the vehicle interior side wall and a contact portion with the flange.

2. a mounting base having a generally U-shaped cross section and including an exterior side wall, an interior side wall, a bottom wall connecting the exterior side wall and the interior side wall, a hollow seal portion integrated with the exterior side wall of the mounting base, and a lip portion extending obliquely from an exterior surface of the interior side wall toward the exterior side wall and toward the bottom wall, wherein the resin opening trim weatherstrip is attached to a flange of a vehicle body by the exterior side wall and the lip portion, the lip portion includes a soft portion formed of a soft resin having a lower hardness than the mounting base portion; and a hard portion having a hardness equal to or greater than that of the mounting base.

3. 3. The resin opening trim weatherstrip according to claim 2, wherein the hard portion is not formed at a connecting portion between the lip portion and the vehicle interior side wall and at a contact portion between the lip portion and the flange.

4. 4. The resin opening trim weatherstrip according to claim 2, wherein the hard portion is formed on the bottom wall side of the lip portion.

5. 5. The resin opening trim weatherstrip according to claim 4, wherein the soft portion between the vehicle interior side wall and the hard portion has a recess formed therein such that the thickness of the soft portion is greater on the vehicle interior side wall side than on the hard portion side.

6. 4. The resin opening trim weatherstrip according to claim 2, wherein the hard portion occupies 50% to 80% of the cross section of the lip portion.

7. 4. The resin opening trim weatherstrip according to claim 2, wherein a thick convex portion is formed on the bottom wall side of the lip portion.

8. 3. The resin opening trim weatherstrip according to claim 1, wherein a sloped portion is formed at the tip of the lip portion on the vehicle exterior side wall side, and when the opening trim weatherstrip is attached to the flange, the angle between the sloped portion and the flange is less than 30 degrees.

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