Belt molding and method for manufacturing the same

Abstract

A belt mold and a manufacturing method thereof are provided, which can fix an end cap to a mold body without excessively limiting the selection of materials for the mold body and the end cap. The belt mold includes a long mold body (10) and an end cap (30). The mold body (10) includes an opposite portion (a side wall remaining portion 16) positioned on an in-vehicle side with respect to an insertion portion (32) of the end cap and opposing the insertion portion (32) when the end cap is attached to the mold body. In a portion of the opposite portion (16) of the mold body closer to a cover portion (31) of the end cap with respect to a hooking surface (37a) formed on the insertion portion (32) of the end cap, a protruding portion (21) obtained by melting and deforming a portion of the opposite portion (16) by an ultrasonic welding head (40) is formed. The protruding portion (21) protrudes toward an out-vehicle side with respect to an in-vehicle side surface (32a) of the insertion portion (32) of the end cap, so that movement of the end cap (30) can be prevented based on engagement with the hooking surface (37a).

Description

TECHNICAL FIELD

[0001] The present application relates to a belt molding for a vehicle. In particular, the present application relates to a belt molding of the type in which an end cap is attached to one end of a long belt molding body. Examples of the object to which such a belt molding is attached include a front door and a rear door of a vehicle. BACKGROUND

[0002] Patent Document 1 relates to a vehicle molding body including a long molding body and a molded end cap, and particularly to a method for attaching the molded end cap (see paragraphs 0001 and 0002). According to the document Figures 9 to 1 4 and paragraphs 0036 to 0045, in the attachment method, after the ultrasonic welding head 40 is disposed so as to face the molding body 10 and the molded end cap 20, the cap support portion 22 of the molded end cap is pressed toward the molding body 10 with the ultrasonic welding head 40 subjected to ultrasonic vibration Figure 10 and 11 ). Then, due to the frictional heat of the ultrasonic vibration, a portion of the molding body 10 and a portion of the cap support portion 22 melt, and the contact portion 43 of the ultrasonic welding head is pushed into the cap support portion 22 along the pressure application direction (Fig. 12). In association with the pushing of the contact portion 43, the molten portion of the cap support portion 22 is embedded in the molding body 10 in a molten or softened state (embedded portion 22a in Fig. 13). Then, by this embedding, the ultrasonic welding of the molded end cap 20 to the molding body 10 is completed (Fig. 14).

[0003] REFERENCE LIST

[0004] PATENT DOCUMENT

[0005] Patent Document 1: JP 5909959 B2 SUMMARY

[0006] TECHNICAL PROBLEM

[0007] However, the technology according to Patent Document 1 also has the following limitations (restrictions) and concerns.

[0008] First, according to paragraph 0016 in Patent Document 1, in order to weld the molded end cap to the molding body, the molding body and the molded end cap are preferably formed of different resin materials having relatively close melting points. That is, there is an unavoidable limitation (restriction) in the material selection for the molding body 10 and the molded end cap 20. Second, in Patent Document 1, a method of applying pressure to the cap support portion 22 of the molded end cap 20 with the ultrasonic welding head 40 subjected to ultrasonic vibration is employed, and therefore when the molded end cap is formed of a slightly brittle resin such as polybutylene terephthalate (PBT), the pressure applied by the ultrasonic welding head can cause the molded end cap to crack (appear cracks).

[0009] An object of the present application is to provide a belt molding capable of fixing an end cap to a molding body without excessively restricting selection of materials for the molding body and the end cap, and a method for manufacturing the belt molding.

[0010] Solution to the problem

[0011] The application according to claim 1 is characterized by a method for manufacturing a belt molding configured to be attached along an upper edge of a door panel of a vehicle door, the belt molding including a long molding body made of a thermoplastic resin and an end cap configured to be attached to one end portion of the molding body,

[0012] The method includes:

[0013] a step of preparing the molding body, wherein the molding body includes an outside-in-vehicle side wall portion and an inside-in-vehicle side wall portion that are opposed to each other, and a top wall portion that integrally connects the two side wall portions, the inside-in-vehicle side wall portion including a side wall remaining portion formed by removing a portion of the inside-in-vehicle side wall portion near an end portion of the molding body;

[0014] a step of preparing an end cap, wherein the end cap includes a cover portion configured to close an open end of the molding body and an insertion portion extending from the cover portion and configured to be inserted between the outside-in-vehicle side wall portion and the side wall remaining portion of the molding body, the insertion portion including an inside-in-vehicle side surface extending on an inside-in-vehicle side along an insertion direction of the end cap, a hooking surface being formed on the insertion portion so as to cross the inside-in-vehicle side surface;

[0015] an insertion step of inserting the insertion portion of the end cap into the molding body so that the insertion portion of the end cap is disposed to be opposed to a portion of the molding body (hereinafter referred to as "opposed portion"), the portion of the molding body being positioned on an inside-in-vehicle side with respect to the insertion portion and being opposed to the insertion portion; and

[0016] a protrusion forming step of forming a protrusion in the molding body, wherein the protrusion protrudes outward-in-vehicle side with respect to the inside-in-vehicle side surface of the insertion portion of the end cap by deforming a portion of the opposed portion of the molding body with respect to the hooking surface, the portion of the opposed portion of the molding body being closer to the cover portion of the end cap,

[0017] wherein movement of the end cap in a direction opposite to the insertion direction can be stopped based on engagement between the protrusion of the molding body and the hooking surface of the end cap.

[0018] According to the application of claim 1, the protruding portion formed by deforming a part of the opposite portion of the molding body protrudes toward the vehicle outer side with respect to the vehicle inner side surface of the insertion portion of the end cap, and thus the movement of the end cap in the direction opposite to the insertion direction is prevented based on the engagement (i.e., mechanical interference) between the protruding portion and the hooking surface of the insertion portion of the end cap, and the end cap can be prevented from falling off from the molding body. In this method, the molding body and the end cap are not welded to each other, and thus the molding body and the end cap do not need to be formed of materials having similar melting points, and the selection of materials is hardly limited (high degree of freedom in material selection). In the protruding portion forming step, the molding body is deformed, and the end cap does not need to be deformed, and thus even if the end cap is made of a material that is easily broken, the end cap can not be damaged.

[0019] The application of claim 2 is characterized by the method of manufacturing a molding body according to claim 1, wherein, in the protruding portion forming step, a part of the opposite portion of the molding body is melted and deformed to form the protruding portion.

[0020] The application of claim 2 exhibits the following effects in addition to the effects of the application of claim 1. That is, by using melting as the deformation method, a part of the opposite portion of the molding body can be easily deformed, and the protruding portion can be easily formed.

[0021] The application of claim 3 is characterized by the method of manufacturing a molding body according to claim 2, wherein, in the protruding portion forming step, an ultrasonic welding horn is brought into contact with the opposite portion of the molding body to melt a part of the opposite portion.

[0022] The application of claim 3 exhibits the following effects in addition to the effects of the application of claim 2. That is, by using an ultrasonic welding horn, a part of the opposite portion can be heated and melted in a precisely positioned manner, and thus the protruding portion can be formed within a limited position or range. By stopping the vibration of the ultrasonic welding horn, the melting of the resin can be immediately stopped (completed in a short time), and the deformation due to melting can be easily controlled.

[0023] The application of claim 4 is characterized by the method of manufacturing a molding body according to claim 3, wherein the ultrasonic welding horn includes a tip protruding portion formed at a tip end of the ultrasonic welding horn and an annular recess portion formed at an outer peripheral edge of the tip protruding portion.

[0024] According to the application of claim 4, in addition to the effects of the application of claim 3, the following effects are exhibited. That is, when the ultrasonic horn is used, while the portion in contact with the tip protrusion is melted, the excess molten resin can be accommodated in the annular recess and solidified in the annular recess. Therefore, it is possible to prevent the excess molten resin from leaking to the periphery of the protrusion unexpectedly, and it is possible to prevent appearance damage (appearance deterioration).

[0025] The application of claim 5 is characterized by the method of manufacturing a molded article according to claim 2, 3 or 4, wherein, in the protrusion forming step, as the portion of the opposing portion of the molded article body is melted, a portion of the molten thermoplastic resin enters between the opposing portion and the insertion portion around the protrusion and fills the gap, and then solidifies.

[0026] The application of claim 5, in addition to the effects of the application of claim 2, 3 or 4, exhibits the following effects. That is, when the end cap is inserted into the molded article body, a slight gap is inevitably generated between the opposing portion of the molded article body and the insertion portion of the end cap. In this regard, according to the method, a portion of the thermoplastic resin obtained by melting a portion of the opposing portion for forming the protrusion enters the gap between the opposing portion and the insertion portion around the protrusion, and solidifies in a state of filling the gap. Therefore, it is possible to prevent or control the wobble between the molded article body and the end cap.

[0027] The application of claim 6 is characterized by the method of manufacturing a molded article according to any one of claims 1 to 5, wherein a caught portion is formed on the side wall remaining portion of the molded article body that has been prepared, and a catching portion configured to be caught with the caught portion of the molded article body is formed on the insertion portion of the end cap that has been prepared, and in the insertion step, the end cap is temporarily positioned with respect to the molded article body based on the mutual catching between the catching portion and the caught portion.

[0028] The method of claim 6, in addition to the effects of the application of any one of claims 1 to 5, exhibits the following effects. That is, according to the method, in the insertion step, the end cap can be temporarily positioned with respect to the molded article body based on the mutual catching between the catching portion and the caught portion, and therefore, the subsequent protrusion forming step can be smoothly performed.

[0029] The application of claim 7 is characterized by the method of manufacturing a molded article according to any one of claims 1 to 6, wherein, after the formation of the protrusion is completed, the protrusion and the hooking surface are disposed to be adjacent to and in contact with each other in the longitudinal direction of the molded article.

[0030] The method according to claim 7, in addition to the effects of the invention according to any one of claims 1 to 6, exhibits the following effect. That is, it is possible to prevent or control the shake between the molded member body and the end cap by the mutual contact between the protruding portion of the molded member body and the hooking surface of the end cap.

[0031] The invention according to claim 8 is characterized by a belt molding configured to be attached along an upper edge of a door panel of a vehicle door, the belt molding comprising:

[0032] a long molded member body made of a thermoplastic resin; and

[0033] an end cap configured to be attached to one end portion of the molded member body,

[0034] wherein the molded member body includes an outboard side wall portion and an inboard side wall portion that are opposed to each other, and a top wall portion that integrally connects the two side wall portions, the inboard side wall portion includes a side wall remaining portion formed by removing a portion of the inboard side wall portion near the end portion of the molded member body,

[0035] the end cap includes a cover portion configured to close an open end of the molded member body, and an insertion portion that extends from the cover portion and is configured to be inserted between the outboard side wall portion of the molded member body and the side wall remaining portion,

[0036] the insertion portion of the end cap includes an inboard side surface that extends on the inboard side along an insertion direction of the end cap, a hooking surface that is provided to cross the inboard side surface is formed on the insertion portion,

[0037] the molded member body includes an opposing portion that is positioned on the inboard side with respect to the insertion portion of the end cap and opposes the insertion portion when the end cap is attached to the molded member body, and

[0038] a portion of the opposing portion of the molded member body is formed with a protruding portion that is formed by deforming a portion of the opposing portion and that protrudes on the outboard side with respect to the inboard side surface of the insertion portion of the end cap, so that movement of the end cap in a direction opposite to the insertion direction can be blocked based on engagement of the protruding portion with the hooking surface.

[0039] According to the application of claim 8, the protrusion formed by deforming a part of the opposite portion of the molding body protrudes on the outside of the vehicle relative to the inside-of-vehicle side surface of the insertion portion of the end cap, and thus the movement of the end cap in the direction opposite to the insertion direction is prevented based on the engagement (i.e., mechanical interference) between the protrusion and the hooking surface of the insertion portion of the end cap, and the end cap can be prevented from falling off from the molding body. In this method, the molding body and the end cap are not welded to each other, and thus the molding body and the end cap do not need to be formed of materials having similar melting points, and there is almost no restriction on the selection of materials (high degree of freedom in material selection).

[0040] The application according to claim 9 is characterized in that the belt molding according to claim 8, wherein the protrusion and the hooking surface are disposed adjacent to each other and in contact with each other in the longitudinal direction of the belt molding when the end cap is attached to the molding body.

[0041] The application according to claim 9 exhibits the following effects in addition to the effects of the application according to claim 8. That is, according to this configuration, the play between the molding body and the end cap can be prevented or controlled by the mutual contact between the protrusion of the molding body and the hooking surface of the end cap.

[0042] The application according to claim 10 is characterized in that the belt molding according to claim 8 or 9, wherein the protrusion is formed by melting and deforming a part of the opposite portion; and the thermoplastic resin obtained by melting a part of the opposite portion enters between the opposite portion and the insertion portion around the protrusion and fills the gap.

[0043] The application according to claim 10 exhibits the following effects in addition to the effects of the application according to claim 8 or 9. That is, when the end cap is attached to the molding body, a slight gap is inevitably generated between the opposite portion of the molding body and the insertion portion of the end cap. In this regard, according to this configuration, a part of the thermoplastic resin obtained by melting a part of the opposite portion for forming the protrusion enters the gap between the opposite portion and the insertion portion around the protrusion and fills the gap. Thus, the play between the molding body and the end cap can be prevented or controlled.

[0044] The application according to claim 11 is characterized in that the belt molding according to any one of claims 8 to 10, wherein the opposite portion is formed by a side wall remaining portion of the inside-of-vehicle side wall portion, and the protrusion is formed on the side wall remaining portion.

[0045] The method according to claim 11, in addition to the effects of the invention according to any one of claims 8 to 10, exhibits the following effect. That is, in this configuration, the opposing portion that forms the protrusion is provided in the (side wall remaining portion) of the inboard side wall portion, and therefore it is possible to ensure a relatively large area (i.e., the range of the opposing portion that serves as a deformation target) available for forming the protrusion. Therefore, it is possible to ensure the volume of the protrusion obtained by deformation of the opposing portion to the extent necessary, and it is possible to stably secure the end cap to the molded body by the protrusion.

[0046] The invention according to claim 12 is characterized by the molded belt according to any one of claims 8 to 11, wherein the protrusions are formed at two or more locations.

[0047] The method according to claim 12, in addition to the effects of the invention according to any one of claims 8 to 11, exhibits the following effect. That is, according to this configuration, the end cap can be more securely fixed to the molded body by the plurality of protrusions.

[0048] Advantages of the invention

[0049] As described above, according to the molded belt and the method for manufacturing the same of the present invention, the end cap can be secured to the molded body without excessively restricting the selection of the materials of the molded body and the end cap. BRIEF DESCRIPTION OF DRAWINGS

[0050] Figure 1 is a schematic view showing a vehicle door (front door).

[0051] Figure 2 is a cross-sectional view of the molded belt taken along the line II-II in Figure 1 .

[0052] Figure 3 is a rear view of the molded belt according to the first embodiment (the portion enclosed by the circle III in Figure 1 ) as viewed from the rear side.

[0053] Figure 4 is an exploded view (rear side view) of the molded belt shown in Figure 3 .

[0054] Figure 5 shows a cross-sectional view taken along the line V-V in Figure 3 , in which (A) and (B) show a series of cross-sectional views showing an outline of the protrusion forming step in the first embodiment.

[0055] Figure 6 (A) of Figure 3 shows a cross-sectional view taken along the line VI-VI in Figure 6(A) shows a partial enlarged cross-sectional view of a portion of (B) shown in an enlarged manner Figure 6 (A) shows a partial enlarged cross-sectional view of a portion of (B) shown in an enlarged manner

[0056] Figure 7 (A) shows a partial enlarged cross-sectional view of a portion of (B) shown in an enlarged manner Figure 3 (A) shows a partial enlarged cross-sectional view of a portion of (B) shown in an enlarged manner

[0057] Figure 8 (A) shows a partial enlarged cross-sectional view of a portion of (B) shown in an enlarged manner Figure 7 (A) shows a partial enlarged cross-sectional view of a portion of (B) shown in an enlarged manner

[0058] Figure 9 (A) shows a partial enlarged cross-sectional view of a portion of (B) shown in an enlarged manner Figure 3 (A) shows a partial enlarged cross-sectional view of a portion of (B) shown in an enlarged manner

[0059] Figure 10 (A) shows a partial enlarged cross-sectional view of a portion of (B) shown in an enlarged manner Figure 9 (A) shows a partial enlarged cross-sectional view of a portion of (B) shown in an enlarged manner

[0060] Figure 11 (A) shows a partial enlarged cross-sectional view of a portion of (B) shown in an enlarged manner

[0061] Reference Number List

[0062] 1: vehicle door

[0063] 2: door panel

[0064] 3: belt molding

[0065] 10: molding body

[0066] 11: outboard side wall portion

[0067] 12: inboard side wall portion

[0068] 13: top wall portion

[0069] 14: folded elongated protrusion ("opposite portion" in the third embodiment)

[0070] 16: side wall remaining portion ("opposite portion" in the first embodiment)

[0071] 17: extension portion ("opposite portion" in the second embodiment)

[0072] 18: engaged portion

[0073] 19: Resin layer (generated from molten thermoplastic resin)

[0074] 21: Protrusion

[0075] 30: End cap

[0076] 31: Cover portion

[0077] 32: Insertion portion

[0078] 32a: Inner side surface of insertion portion

[0079] 33: Support piece (part of insertion portion)

[0080] 33a: Inner side surface of support piece (also inner side surface of insertion portion)

[0081] 34: Engagement portion

[0082] 37: Hooking portion

[0083] 37a: Hooking surface

[0084] 40: Ultrasonic welding head

[0085] 41: Tip protrusion

[0086] 42: Annular protrusion

[0087] 43: Annular recess

[0088] S: Gap DETAILED DESCRIPTION

[0089] Hereinafter, several embodiments of the present application will be described with reference to the accompanying drawings.

[0090] Figure 1 A typical use example of the belt molding according to the present application is shown. As shown, the belt molding 3 is attached to the outer door panel 2 constituting the lower half of the door 1 along the upper edge (belt line) of the door panel 2. The belt molding 3 includes a long main body portion of the belt molding (hereinafter referred to as "molding body") 10, and an end cap 30 attached to the rear end portion (right end portion in the figure) of the molding body 10. Figure 1 Figure 1 As shown, the belt molding 3 is attached to the outer door panel 2 constituting the lower half of the door 1 along the upper edge (belt line) of the door panel 2. The belt molding 3 includes a long main body portion of the belt molding (hereinafter referred to as "molding body") 10, and an end cap 30 attached to the rear end portion (right end portion in the figure) of the molding body 10.

[0091] As shown, the belt molding 3 is attached to the outer door panel 2 constituting the lower half of the door 1 along the upper edge (belt line) of the door panel 2. The belt molding 3 includes a long main body portion of the belt molding (hereinafter referred to as "molding body") 10, and an end cap 30 attached to the rear end portion (right end portion in the figure) of the molding body 10. Figure 2 ​As shown, the molding body 10 includes: an outboard side wall portion 11 and an inboard side wall portion 12 facing each other; and a top wall portion 13 integrally connecting the two side wall portions 11 and 12. In the case of the three wall portions (11 to 13), the molding body 10 has a generally U-shaped cross section opening downward. An elongated folded-over protrusion 14 formed by folding back toward the inboard side is provided at the lower end of the outboard side wall portion 11. An inboard side lip portion 15a is provided on the inboard side wall surface of the inboard side wall portion 12, an outboard side lip portion 15b is provided near the lower end of the outboard side wall portion 11, a retaining lip portion 15c is provided at the tip end of the folded-over elongated protrusion 14 at the lower end of the outboard side wall portion, and a trim lip portion 15d is provided near the joint portion between the top wall portion 13 and the inboard side wall portion 12. However, these lip portions 15a to 15d are generally known. When the flange 2f (indicated by a broken line) of the door panel 2 is inserted into the lower opening of the molding 3, the flange 2f is sandwiched between the retaining lip portion 15c and the inboard side wall portion 12, and the molding 3 is attached to the door panel 2.

[0092] The molding body 10 is preferably formed by extruding an olefin-based thermoplastic resin material. However, a relatively hard olefin-based thermoplastic resin (e.g., polypropylene) is used for the three wall portions (11 to 13) and the elongated protrusion (14) of the molding body 10. On the other hand, a relatively soft olefin-based thermoplastic elastomer is used for the four lip portions (15a to 15d) other than the three wall portions and the elongated protrusion. The molding body 10 can be made of a material other than an olefin-based thermoplastic resin (e.g., a styrene-based thermoplastic resin, chlorovinyl, rubber, etc.) as long as the material is melt-fusible and elastically deformable.

[0093] The end cap 30 is preferably formed of polybutylene terephthalate (PBT) as a kind of thermoplastic resin. Examples of thermoplastic resins other than PBT that can be used for the end cap 30 include acrylonitrile butadiene styrene (ABS) resin, polypropylene (PP), polyacetal (POM), polyamide (PA), polyphenylene sulfide (PPS), and polyether ether ketone (PEEK).

[0094] The description so far describes matters common to each of the embodiments to be described below.

[0095] [First Embodiment]

[0096] Figures 3-6 A molding according to the first embodiment of the present application is shown. In particular, Figure 4 is a schematic view showing a state in which the molding body 10 and the end cap 30 are detached. As Figure 4As shown, near the rear end of the molded body 10, primarily the lower portion of the inner sidewall portion 12 is removed, while the upper portion of the inner sidewall portion 12 is retained (hereinafter referred to as "sidewall retention portion 16"). The sidewall retention portion 16 does not include the inner lip 15a, and with the formation of the sidewall retention portion 16, a portion of the retaining lip 15c of the outer sidewall portion 11 facing the sidewall retention portion 16 is also substantially removed, leaving only the root portion. The internal space of the insertion portion 32 for inserting and placing the end cap 30 is defined by three wall portions (outer sidewall portion 11, top wall portion 13, and sidewall retention portion 16) located near the rear end of the molded body 10.

[0097] like Figure 3 and Figure 4 As shown, an extension 17 is formed at one end of the molded part body 10 by a portion of the sidewall retaining portion 16. The extension 17 is a sidewall portion that extends downward from the upper edge of the inner sidewall portion 12 and forms part of the sidewall retaining portion 16. When the end cap 30 is attached to the molded part body 10, the extension 17 is elastically deformable to a certain extent toward the inner side of the vehicle. The extension 17 includes a front edge 17a and a rear edge 17b, and an engaging portion 18 is formed on the front edge 17a in a direction that intersects the insertion direction of the end cap. The rear edge 17b of the extension 17 forms the rear end (open end) of the molded part body 10.

[0098] like Figure 3 and Figure 4 As shown, the end cap 30 includes a cover portion 31 and an insertion portion 32, which extends substantially horizontally from the front surface of the cover portion 31 along the longitudinal direction (i.e., the insertion direction) of the end cap. The cover portion 31 is the portion used to close the rear end (open end) of the molded part body 10 and constitutes the rearmost portion of the end cap 30. The insertion portion 32 is the portion to be inserted and placed between the outer sidewall portion 11 and the sidewall retaining portion 16 of the molded part body 10. The insertion portion 32 includes an inner side surface 32a extending along the insertion direction of the end cap on the inner side.

[0099] The insertion portion 32 of the end cap is provided with a thick plate-shaped support portion (hereinafter referred to as "support piece") 33, which extends downward from the upper edge of the insertion portion 32. The support piece 33 is part of the insertion portion 32 of the end cap. The support piece 33 has a generally rectangular shape in a side view, and a engaging portion 34 protruding from the inner surface 33a of the support piece 33 toward the inner side of the vehicle is provided near the front of the support piece 33. When the end cap 30 is inserted into the molded part body 10, the engaging portion 34 serves as a means of temporarily positioning (or temporarily fixing) the end cap 30 relative to the molded part body 10 based on mutual engagement with the engaging portion 18 of the extension portion 17. Figure 4As shown, an inclined surface 35 is formed at a position in front of the engaging portion 34 of the support piece 33. When the end cap 30 is inserted into the molded member body 10, the inclined surface 35 serves as a pressing and guiding surface that presses the extension portion 17 of the molded member body toward the vehicle interior side to guide temporary elastic deformation.

[0100] Further, the end cap 30 according to the first embodiment includes a hooking portion 37 formed at a position in front of the support piece 33 on the upper side portion of the insertion portion 32. The hooking portion 37 is a recessed portion cut out in a substantially semicircular shape in the side view, and the semicircular shape corresponds to the outer shape (circular shape) of the tip end of an ultrasonic welding horn 40 that will be described later. In consideration of assembly tolerances and the like, in the design, the radius of the semicircular shape of the hooking portion 37 is generally set to be slightly larger than the radius of the circular shape of the ultrasonic welding horn, but in the present application, it is preferable that the radii of both are substantially the same. The hooking portion 37 includes a curved hooking surface 37a (see FIG. 6) on the inner side of the recessed shape, which extends in the vehicle interior-exterior direction (width direction of the end cap). The hooking surface 37a is in an intersecting positional relationship with the vehicle interior side surface 32a of the insertion portion 32 of the end cap, and functions to prevent movement of the end cap (i.e., movement in the direction opposite to the insertion direction of the end cap) based on engagement with the protruding portion 21 that will be described later. Figure 4 As shown in the side view, the hooking portion 37 is a recessed portion cut out in a substantially semicircular shape, and the semicircular shape corresponds to the outer shape (circular shape) of the tip end of the ultrasonic welding horn 40 that will be described later. In consideration of assembly tolerances and the like, in the design, the radius of the semicircular shape of the hooking portion 37 is generally set to be slightly larger than the radius of the circular shape of the ultrasonic welding horn, but in the present application, it is preferable that the radii of both are substantially the same. The hooking portion 37 includes a curved hooking surface 37a (see Figure 4 and 6 ), the hooking surface 37a extending in the vehicle interior-exterior direction (width direction of the end cap). The hooking surface 37a is in an intersecting positional relationship with the vehicle interior side surface 32a of the insertion portion 32 of the end cap, and functions to prevent movement of the end cap (i.e., movement in the direction opposite to the insertion direction of the end cap) based on engagement with the protruding portion 21 that will be described later.

[0101] In Figure 4 and Figure 6 , the hooking portion 37 is shown as a recessed portion that penetrates the insertion portion 32 in the vehicle interior-exterior direction (width direction of the end cap), but this hooking portion 37 serving as a recessed portion does not need to penetrate the insertion portion 32, and can be a non-penetrating recessed portion in which only the vehicle interior side surface 32a of the insertion portion 32 is recessed toward the vehicle exterior side. In short, as long as the hooking surface 37a as described above can be provided, the form (penetrating / non-penetrating) of the hooking portion 37 is not limited.

[0102] Next, a method for attaching and fixing the end cap 30 to the molded member body 10 (i.e., a method for assembling a molded member) will be described. After the above-described molded member body 10 and end cap 30 are prepared in advance, the method generally includes an insertion step of inserting and disposing the end cap 30 in the molded member body 10, and a protruding portion forming step of fixing the end cap 30 to the molded member body 10 by forming the protruding portion 21 that will be described later in the molded member body 10.

[0103] In the insertion step, the insertion portion 32 of the end cap 30 is inserted into the molding body from the open end of the molding body 10. Then, first, the inclined surface 35 positioned on the front side of the engaging portion 34 of the end cap comes into contact with the rear side edge 17b of the extension portion 17 of the molding body. When the end cap 30 is further pushed after the contact, the rear side edge 17b of the extension portion slides while coming into contact with the inclined surface 35, and the extension portion 17 is gradually elastically deformed toward the vehicle interior side due to the pressing and guiding action of the inclined surface 35. Thereafter, when the end cap 30 is further pushed and the engaging portion 34 of the end cap passes (the position of) the extension portion 17, the sliding contact between the extension portion 17 and the engaging portion 34 is released, and the temporarily elastically deformed extension portion 17 returns to the original position or shape before the deformation. In Figure 3 and Figure 4 ).

[0104] In the insertion completion state, as shown in Figure 3 , the engaging portion 34 of the end cap 30 is disposed in front of the engaged portion 18 of the extension portion 17 of the molding body. Therefore, even if an external force in the pulling-out direction (i.e., the direction opposite to the insertion direction of the end cap) acts on the end cap 30, the engaging portion 34 is caught by the engaged portion 18, and the end cap 30 does not come off the molding body 10. In this way, the end cap 30 is temporarily positioned with respect to the molding body 10 based on the mutual engagement between the engaging portion 34 and the engaged portion 18. This is a prerequisite or preparation for smoothly performing the subsequent protrusion formation step.

[0105] In the insertion completion state, as shown in Figure 5 (A) and Figure 6 (A), the upper side portion of the insertion portion 32 of the end cap 30 (particularly, in the vicinity of the hooking portion 37) and the side wall reservation portion 16 of the molding body 10 are disposed to face each other. That is, in the present embodiment, the side wall reservation portion 16 serves as the "opposite portion positioned on the vehicle interior side with respect to the insertion portion (32) of the end cap and facing the insertion portion (32)". As can be seen from Figure 6 (A), since the insertion portion 32 and the side wall reservation portion 16 serving as the opposite portion face each other substantially in parallel, a gap S is inevitably formed between them.

[0106] In the protrusion forming step following the insertion step, a protrusion 21 protruding outward from the inner surface 32a of the insertion portion 32 of the end cap is formed in the molded body 10 by deforming (melting and deforming) a portion of the sidewall retaining portion 16 acting as the opposing portion, wherein said portion of the sidewall retaining portion 16 is closer to the cover portion 31 relative to the hook surface 37a of the end cap. In the protrusion forming step, Figure 5 The ultrasonic welding head 40, partially and schematically shown in (A), serves as a melt deformation device. The ultrasonic welding head 40 used in this embodiment includes a tip protrusion 41 with a circular cross-section and an annular protrusion 42 surrounding the tip protrusion 41 at the tip of the ultrasonic welding head 40. An annular recess 43 is formed between the tip protrusion 41 and the annular protrusion 42 along the outer peripheral edge of the tip protrusion 41. The annular recess 43 contains any remaining resin melted by the tip protrusion 41 and prevents undesirable diffusion of the molten resin.

[0107] Figure 5 (A) and (B) and Figure 6 (A) and (B) illustrate the specific process of the protrusion forming step using the ultrasonic welding head 40. When forming the protrusion, the ultrasonic welding head 40 is positioned on the inner side of the molded part body 10, and the rear surface of the cap 31 of the end cap 30 contacts a jig (not shown) to position the end cap 30 and the molded part body 10.

[0108] Then, as Figure 5 (A) and Figure 6 As shown in (A), the ultrasonic welding head 40 is configured to face the sidewall retainer 16 and the insertion portion 32, such that the tip protrusion 41 of the ultrasonic welding head 40 faces (directly faces) the hook portion 37 of the end cap with the sidewall retainer 16 of the molded body inserted therebetween. After the tip protrusion 41 of the ultrasonic welding head 40 is pressed against the sidewall retainer 16 at approximately a right angle, the ultrasonic welding head 40 is subjected to ultrasonic vibration and slowly advances toward the hook portion 37. As the ultrasonic welding head 40 contacts, presses, and advances, a portion of the sidewall retainer 16 is heated and melted in a precisely positioned manner, and the molten resin enters the hook portion 37 while being pressed by the tip protrusion 41 of the ultrasonic welding head, thereby forming the protrusion 21 (see [reference]). Figure 5 (B) and Figure 6 Subsequently, the ultrasonic welding head 40 separates from the sidewall retention portion 16, thereby allowing the molten or softened protrusion 21 to solidify in the hook portion 37 through natural cooling, and the solidified protrusion 21 is completed. On the back side (base end side) of the protrusion 21, complementary shapes (i.e., central recess 22, annular protrusion 23, and annular groove 24) are formed as traces of the top protrusion 41, annular recess 43, and annular protrusion 42 of the ultrasonic welding head 40.

[0109] likeFigure 6 (B) and Figure 5 As shown in (A), the completed protrusion 21 is provided in the hook portion 37 of the end cap, and is disposed adjacent to and in contact with the hook surface 37a in the longitudinal direction of the molded part. The molded part body 10 and the end cap 30 are fixed to each other by the mutual contact between the protrusion 21 of the molded part body and the hook surface 37a of the end cap, and the shaking between the molded part body 10 and the end cap 30 is prevented or controlled.

[0110] Because a portion of the sidewall retaining portion 16 is melted by the ultrasonic welding head 40 during the formation of the protrusion, such as Figure 3 As shown in the enlarged view in (B), a small portion of molten thermoplastic resin (19) leaks out to the periphery of the protrusion 21, enters the gap S between the insertion portion 32 and the sidewall retainer 16, and fills the gap S. However, the gap S is very narrow, so the molten resin 19 does not immediately flow out of the gap S, and is properly retained in the gap S due to the surface tension of the molten resin, etc. The resin layer 19 filling the gap S cures over time into a state integral with the protrusion 21, and the resin layer 19 cured in the gap S serves as an auxiliary element to prevent or control the shaking between the molded part body 10 and the end cap 30.

[0111] (Effects of the first embodiment)

[0112] According to the first embodiment, the protrusion 21, formed by melting and deforming a portion of the sidewall retaining portion 16 serving as the opposing portion, protrudes outward relative to the inner surface 32a of the insertion portion 32 of the end cap, and thus the movement of the end cap 30 in the direction opposite to the insertion direction is restricted based on the engagement (i.e., mechanical interference) between the protrusion 21 and the hook surface 37a of the insertion portion 32 of the end cap. Therefore, it is possible to prevent the end cap 30 from falling off the molded body 10.

[0113] In the method according to the first embodiment, the molded body 10 and the end cap 30 are not welded to each other, and therefore the molded body 10 and the end cap 30 do not need to be formed from materials with similar melting points, and there are almost no restrictions on the choice of materials. In the protrusion forming step, the molded body 10 is melted and deformed, and the end cap 30 does not need to be deformed, so even if the end cap 30 is made of a brittle material (e.g., PBT resin), the end cap 30 can remain intact.

[0114] According to the first embodiment, the ultrasonic horn 40 is used, and thus a portion of the side wall reserved portion 16 serving as the opposing portion can be heated and melted in a precise positioning manner by the tip protrusion portion 41 that is ultrasonically vibrated. On the other hand, by stopping the ultrasonic vibration, the melting of the resin can be immediately (or in a very short time) stopped. Thus, the deformation due to the melting can be easily controlled, and the protrusion portion 21 can be appropriately formed in a limited position or range.

[0115] By using the ultrasonic horn 40 indicated by (A) of Figure 7 , while the resin portion in contact with the tip protrusion portion 41 is melted, the excess melted resin can be treated as the annular protrusion portion 23 that appears on the base end side of the protrusion portion 21 by accommodating the excess melted resin into the annular recessed portion 43 and solidifying it in the annular recessed portion. Thus, the excess melted resin can be prevented from accidentally leaking to the periphery of the protrusion portion 21, and the damage (appearance deterioration) of the appearance can be prevented.

[0116] In the first embodiment, the hooking portion 37 is provided on the upper side portion of the insertion portion 32 of the end cap, and in response thereto, the protrusion portion 21 is formed in the side wall reserved portion 16 of the molded article body at a position opposite to the hooking portion 37 (see Figure 8 ). By forming the protrusion portion 21 at such a position, the protrusion portion 21 is not easily brought into contact with the door panel 2, which is very preferable in design. The opposing portion that will form the protrusion portion 21 is provided in the side wall reserved portion 16, and thus the area available for the opposing portion to form the protrusion portion can be ensured to be relatively large. Thus, the volume of the protrusion portion 21 obtained by the melting deformation of the opposing portion (the side wall reserved portion 16) can be ensured to be necessary degree, and the end cap 30 can be stably fixed to the molded article body 10 by the protrusion portion 21.

[0117] [Second Embodiment]

[0118] Figure 7 and Figure 7 An outline of a molded article according to a second embodiment of the present application is shown. In the following, in order to avoid a lengthy description, the differences from the first embodiment will mainly be described.

[0119] As shown in (A) and (B) of Figure 7 , in the second embodiment, unlike the first embodiment, the hooking portion 37 is provided on the rear end side of the support piece 33 of the end cap 30. Specifically, in Figure 8In the side view of (B), the edge portion on the rear end side of the support piece 33 is shown as an edge portion extending straight in the vertical direction, and an upper portion of the edge portion extending straight in the vertical direction is set as a "hooking portion 37". The straight hooking portion 37 includes a flat hooking surface 37a extending in the depth direction (i.e., the vehicle interior-exterior direction or the width direction of the end cap) in the side view. The hooking surface 37a is in a position relationship intersecting with the vehicle interior side surface 33a of the support piece 33. In the second embodiment, as Figure 7 (A) shows, corresponding to the hooking portion 37 provided on the rear end side of the support piece 33, a protruding portion 21 is formed on the extension portion 17, which is a part of the side wall reservation portion 16 of the molded body. The "molded body 10 before the protruding portion is formed" used in the second embodiment is substantially the same as the molded body before the protruding portion is formed in the first embodiment.

[0120] Figure 8 (A) and (B) show an outline of the protruding portion formation process in the second embodiment.

[0121] The Figure 8 The insertion step of the end cap 30 (before the protruding portion is formed) into the molded body 10 is substantially the same as the insertion step in the first embodiment. However, in the inserted state, as shown in Figure 9 (A), the support piece 33 of the end cap 30 (i.e., a part of the insertion portion 32), particularly the vicinity of the hooking portion 37 of the support piece 33, and the extension portion 17 (i.e., a part of the side wall reservation portion 16) of the molded body are provided to face each other. That is, in the present embodiment, the extension portion 17 as a part of the side wall reservation portion 16 functions as an "opposing portion positioned on the vehicle interior side with respect to the insertion portion (support piece 33) of the end cap and facing the insertion portion (33)".

[0122] In the protruding portion formation step subsequent to the insertion step, by melting and deforming a part of the extension portion 17 functioning as the opposing portion with respect to the hooking surface 37a of the end cap using the ultrasonic welding head 40, the protruding portion 21 protruding toward the vehicle exterior side with respect to the vehicle interior side surface 33a of the support piece 33 of the end cap (i.e., the vehicle interior side surface of the insertion portion) is formed in the molded body 10, wherein the part of the extension portion 17 is closer to the cover portion 31 with respect to the hooking surface 37a of the end cap. As Figure 10 (B) shows, the completed protruding portion 21 is provided adjacent to the hooking portion 37 of the end cap, and is provided in abutment with and in contact with the hooking surface 37a in the longitudinal direction of the molded body. Thus, the end cap 30 is restricted from moving backward (falling off).

[0123] The technical significance of the protrusion 21 in the second embodiment is basically the same as that of the protrusion 21 in the first embodiment. The molded part according to the second embodiment has the same function and effect as that in the first embodiment.

[0124] [Third Embodiment]

[0125] Figure 9 and Figure 9 An outline of a molded part according to a third embodiment of the present invention is shown. In the following description, to avoid lengthy descriptions, the differences from the first embodiment will be primarily described.

[0126] like Figure 9 As shown in (A) and (B), in the third embodiment, unlike the first embodiment, the hook portion 37 is formed on the lower portion of the insertion portion 32 of the end cap 30. The hook portion 37 is... Figure 10 The recessed portion shown in the side view (B) is cut out in a generally semi-circular shape, and the semi-circular shape corresponds to the outer shape of the tip of the ultrasonic welding head. The hook portion 37 includes a curved hook surface 37a on the inner side of the recessed shape, extending in the inward / outward direction (width direction of the end cap). The hook surface 37a is positioned to intersect with the inner surface 32a of the insertion portion 32 of the end cap. In the third embodiment, as... Figure 10 (A) and Figure 9 As shown, corresponding to the hook portion 37 provided on the lower side of the insertion portion 32 of the end cap, the protrusion 21 is formed by using the folded elongated protrusion 14 of the molded body and the retaining lip 15c (the remaining root portion). The "molded body 10 before forming the protrusion" used in the third embodiment is substantially the same as the molded body 10 before forming the protrusion in the first embodiment.

[0127] Figure 9 The protrusion formation process in the third embodiment is generally illustrated.

[0128] Will Figure 10 The insertion step of the end cap 30 shown in (B) into the molded body 10 (before the protrusion is formed) is substantially the same as the insertion step in the first embodiment. However, in the inserted state, as Figure 10 (A) and Figure 5As shown, the lower side portion of the insertion portion 32 of the end cap 30 (particularly, in the vicinity of the hooking portion 37) is disposed opposite to the folded elongated protrusion 14 and the holding lip portion 15c (the remaining root portion) of the molding body 10. That is, in the present embodiment, the folded elongated protrusion 14 and the holding lip portion 15c (the remaining root portion) continuous with the folded elongated protrusion 14 are integrated with each other, and serve as "the opposing portion positioned on the vehicle inner side relative to the insertion portion (32) of the end cap and opposite to the insertion portion (32)" (see Figure 10 and Figure 9 (A) of the accompanying drawings).

[0129] In the protrusion forming step after the insertion step, a protrusion portion 21 projecting toward the vehicle outer side relative to the vehicle inner side surface 32a of the insertion portion 32 of the end cap is formed in the molding body 10 by melting and deforming a portion of the folded elongated protrusion 14 and the holding lip portion 15c (the remaining root portion) serving as the opposing portion, which is closer to the cover portion 31 relative to the hooking surface 37a of the end cap (see Figure 10 ), using the ultrasonic horn 40. As shown in (A) and Figure 11 of the accompanying drawings, the completed protrusion portion 21 is disposed in the hooking portion 37 of the end cap, and is disposed in abutment with and in contact with the hooking surface 37a in the longitudinal direction of the belt molding. Thus, the end cap 30 is restricted from moving backward (falling off). Figure 5

[0130] The technical significance of the protrusion portion 21 of the third embodiment is substantially the same as that of the protrusion portion 21 of the first embodiment. The belt molding according to the third embodiment has the same functions and effects as the first embodiment.

[0131] [MODIFICATION AND PREFERRED EMBODIMENT]

[0132] The present application is not limited to the first to third embodiments, and can be implemented in the following manner.

[0133] In each of the above embodiments, only one protrusion portion 21 is provided for one belt molding, but two or more protrusion portions 21 can be formed for one belt molding. By forming a plurality of protrusion portions 21, the end cap 30 is less likely to be detached from the molding body 10, and the end cap 30 can be more firmly fixed to the molding body 10. In this case, it is preferable to use the ultrasonic melting jig 50 in which two ultrasonic horns 40 are arranged side by side, as shown in Figure 5 By using the jig 50, the working time can be reduced.

[0134] It is preferable that the outer diameter D (see ​ and 11 ) of the ultrasonic horn 40 does not exceed the range of the opposing portion. For example, in ​ ​In the present embodiment, the outer diameter D of the ultrasonic horn 40 is preferably 1.0 mm or more smaller than the height h of the side wall reserved portion 16 serving as the opposing portion. By setting the dimensions in this way, it is possible to cause the resin obtained by melting a portion of the opposing portion to enter the annular recessed portion 43 of the ultrasonic horn 40, and it is possible to solidify without overflowing to the outer periphery.

[0135] In the above-described embodiment, the ultrasonic horn 40 is used, but instead of the ultrasonic horn 40, a thermocouple can be used to form the protruding portion 21.

[0136] In the above-described embodiment, the protruding portion is formed by melting and deforming a portion of the opposing portion, but the protruding portion can also be formed by applying an external force to a portion of the opposing portion.

Claims

1. A belt molding manufacturing method, the belt molding being configured to be attached along an upper edge of a door panel of a vehicle door, the belt molding including a long molding body made of a thermoplastic resin and an end cap configured to be attached to one end of the molding body, the method comprising: a step of preparing the molding body, wherein the molding body includes an outboard side wall portion, an inboard side wall portion opposite to the outboard side wall portion, and a top wall portion integrally connecting the outboard side wall portion and the inboard side wall portion, the inboard side wall portion including a side wall remaining portion formed by removing a portion of the inboard side wall portion near an end of the molding body; a step of preparing an end cap, wherein the end cap includes a cover portion configured to close an open end of the molding body and an insertion portion extending from the cover portion and configured to be inserted between the outboard side wall portion and the side wall remaining portion of the molding body, the insertion portion including an inboard side surface extending on an inboard side along an insertion direction of the end cap, a hooking surface being formed on the insertion portion so as to cross the inboard side surface; an insertion step of inserting the insertion portion of the end cap into the molding body so that the insertion portion of the end cap is disposed opposite to a portion, an opposite portion, of the molding body positioned on an inboard side relative to the insertion portion and opposite to the insertion portion; and a protrusion forming step of forming a protrusion in the molding body, wherein the protrusion is caused to protrude outward of the inboard side relative to the inboard side surface of the insertion portion of the end cap by deforming a portion of the opposite portion of the molding body relative to the hooking surface, the portion of the opposite portion of the molding body being closer to the cover portion of the end cap relative to the hooking surface, wherein movement of the end cap in a direction opposite to the insertion direction is able to be stopped based on engagement between the protrusion of the molding body and the hooking surface of the end cap.

2. The belt molding manufacturing method according to claim 1, wherein in the protrusion forming step, the portion of the opposite portion of the molding body is melted and deformed to form the protrusion.

3. The belt molding manufacturing method according to claim 2, wherein in the protrusion forming step, an ultrasonic horn is brought into contact with the opposite portion of the molding body to melt the portion of the opposite portion.

4. The belt molding manufacturing method according to claim 3, wherein the ultrasonic horn includes a tip protrusion formed at a tip of the ultrasonic horn and an annular recess formed at an outer peripheral edge of the tip protrusion.

5. The belt molding manufacturing method according to claim 2, wherein in the protrusion forming step, as the portion of the opposite portion of the molding body is melted, a portion of the melted thermoplastic resin enters between the opposite portion and the insertion portion around the protrusion and fills a gap, and then solidifies.

6. The method of manufacturing a belt molding according to claim 3, wherein In the protrusion forming step, as the portion of the opposing portion of the molding body melts, a portion of the molten thermoplastic resin enters between the opposing portion and the inserted portion around the protrusion and fills a gap, and then solidifies.

7. The method of manufacturing a belt molding according to claim 4, wherein In the protrusion forming step, as the portion of the opposing portion of the molding body melts, a portion of the molten thermoplastic resin enters between the opposing portion and the inserted portion around the protrusion and fills a gap, and then solidifies.

8. The method of manufacturing a belt molding according to any one of claims 1 to 7, wherein a fitting portion is formed on the side wall remaining portion of the molding body that has been prepared, and a fitting portion configured to fit with the fitting portion of the molding body is formed on the inserted portion of the end cap that has been prepared, and wherein, in the inserting step, the end cap is temporarily positioned with respect to the molding body based on mutual fitting between the fitting portion and the fitted portion.

9. The method of manufacturing a belt molding according to any one of claims 1 to 7, wherein after the formation of the protrusion is completed, the protrusion and the hooking surface are disposed so as to abut against and contact each other in the longitudinal direction of the belt molding.

10. The method of manufacturing a belt molding according to claim 8, wherein after the formation of the protrusion is completed, the protrusion and the hooking surface are disposed so as to abut against and contact each other in the longitudinal direction of the belt molding.

11. A belt molding configured to be attached along an upper edge of a door panel of a vehicle door, the belt molding comprising: a long molding body made of a thermoplastic resin; and an end cap configured to be attached to one end portion of the molding body, wherein the molding body includes an outboard side wall portion, an inboard side wall portion opposite the outboard side wall, and a top wall portion integrally connecting the outboard side wall portion and the inboard side wall portion, the inboard side wall portion including a side wall remaining portion formed by removing a portion of the inboard side wall portion near an end portion of the molding body, wherein the end cap includes a cover portion configured to close an open end of the molding body, and an inserted portion extending from the cover portion and configured to be inserted between the outboard side wall portion and the side wall remaining portion of the molding body, wherein the inserted portion of the end cap includes an inboard side surface extending on an inboard side along an insertion direction of the end cap, a hooking surface configured to cross the inboard side surface being formed on the inserted portion, wherein the molding body includes an opposing portion positioned on the inboard side with respect to the inserted portion of the end cap and opposing the inserted portion when the end cap is attached to the molding body, and wherein, in the inserting step, the end cap is temporarily positioned with respect to the molding body based on mutual fitting between the fitting portion and the fitted portion. wherein a portion of the opposing portion of the molded member body is formed with a protruding portion, the portion of the opposing portion of the molded member body being closer to the cover portion of the end cap with respect to the hooking surface, the protruding portion being formed by deforming a portion of the opposing portion, and the protruding portion protruding toward the outside of the vehicle with respect to the in-vehicle side surface of the insertion portion of the end cap, so that movement of the end cap in a direction opposite to the insertion direction can be prevented based on engagement of the protruding portion with the hooking surface.

12. The belt molding according to claim 11, wherein when the end cap is attached to the molded member body, the protruding portion and the hooking surface are disposed in abutment with and in contact with each other in the longitudinal direction of the belt molding.

13. The belt molding according to claim 11, wherein the protruding portion is formed by melting and deforming a portion of the opposing portion, and wherein thermoplastic resin obtained by melting a portion of the opposing portion enters between the opposing portion and the insertion portion around the protruding portion and fills a gap.

14. The belt molding according to claim 12, wherein the protruding portion is formed by melting and deforming a portion of the opposing portion, and wherein thermoplastic resin obtained by melting a portion of the opposing portion enters between the opposing portion and the insertion portion around the protruding portion and fills a gap.

15. The belt molding according to any one of claims 11-14, wherein the opposing portion is formed by the side wall remaining portion of the in-vehicle side wall portion, and the protruding portion is formed on the side wall remaining portion.

16. The belt molding according to any one of claims 11-14, wherein the protruding portion is formed at two or more positions.

17. The belt molding according to claim 15, wherein the protruding portion is formed at two or more positions.

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