Belt molding

Abstract

The present invention provides a belt molding in which at least a portion of the main body is curved, and in which the covering portion that covers the main body does not or does not easily develop wrinkles resulting from the curved shape. [Solution] The belt molding for a vehicle door comprises a long main body portion 10 having an outer side wall portion 11 and an inner side wall portion 12, and a covering portion 14 that covers the outer surface of the outer side wall portion 11. Here, when X is the length along the longitudinal direction of the cross-sectional centroid G of the main body portion 10 (cross-sectional centroid length), and Y1 is the longitudinal length along the upper edge of the covering portion (or the contact line of the main body portion that contacts the upper edge) on the outer surface of the outer side wall portion to which the covering portion 14 is in close contact (main body upper end length), the end of the main body portion is curved upward in the longitudinal direction of the belt molding, and the relative position of the outer surface of the outer side wall portion with respect to the cross-sectional centroid G is set such that the difference between X and Y1 (X-Y1) in the curved state of the main body portion end is 3 mm or less.

Description

Technical Field

[0001] The present invention is attached along the upper edge of a door panel of a vehicle door and seals between the door panel and a window pane (generally a glass plate), and is also involved in wiping foreign matter adhering to the window pane surface and relates to a belt molding. Examples of the object to which such a belt molding is attached include, for example, the front door and rear door of a vehicle.

Background Art

[0002] Patent Document 1 relates to a belt molding for an automobile door panel. In FIGS. 1 and paragraph 0024 of this document, it is disclosed that a design tape 13 is adhered to the outer surface of the outer wall portion 11 of the belt molding body.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a long belt molding, in order to conform to the shape of the upper side portion of the door panel (for example, an upper side shape in which a part is curved), the belt molding main body may be bent in a specific direction substantially orthogonal to the longitudinal direction. For example, the belt molding main body extending linearly in the horizontal direction may be bent so that the terminal of the main body warps upward. At that time, wrinkles may occur in a part of the coating portion or coating layer (the design tape 13 in Patent Document 1 corresponds to this) adhering to the outer surface of the main body, which may impair the design property. ​

[0005] The object of the present invention is a belt molding in which at least a part of the main body is curved. To provide a belt molding that does not or does not easily produce wrinkles in the covering portion that covers the body due to curvature. It is about doing it. [Means for solving the problem]

[0006] The invention of claim 1 relates to a belt motor mounted along the upper edge of the door panel of a vehicle door. It is, A length having an outer side wall portion and an inner side wall portion connected to and facing the outer side wall portion. The main body is a standard size, A covering that covers at least a portion of the outer surface of the outer side wall portion of the vehicle and is in close contact with the outer surface. Covering part, The main body is molded from a thermoplastic resin or thermoplastic elastomer, In a belt molding in which at least a portion in the longitudinal direction is curved toward a particular side, Let X be the length along the longitudinal direction of the centroid of the cross-section of the main body (hereinafter referred to as the "centroid length"). , The upper edge of the covering portion on the outer surface of the outer side wall portion of the vehicle, which is in close contact with the covering portion. or the longitudinal length of the main body portion along the contact line that contacts the upper edge (hereinafter referred to as "main body portion") Let Y1 be the length of the upper end (referred to as the "upper end length"). The lower edge of the covering portion on the outer surface of the outer side wall portion of the vehicle, which is in close contact with the covering portion. or the longitudinal length of the main body portion along the contact line that contacts the lower edge (hereinafter referred to as "main body portion") When the length of the lower end (referred to as the "lower end length") is Y2, (a) or (b) below, that is, (a) The end of the main body of the belt molding is curved upward in the longitudinal direction. Furthermore, in the curved state of the main body terminal, the cross-sectional centroid length X and the upper end of the main body The difference (X-Y1) from length Y1 is 3 mm or less, and the external dimensions of the vehicle are such that the difference from length Y1 is 3 mm or less. The relative position of the side wall portion on the outer surface of the vehicle is set, or, (b) The end of the main body of the belt molding is curved downward in the longitudinal direction. Furthermore, in the curved state of the main body terminal, the cross-sectional centroid length X and the lower end of the main body The difference with length Y2 (X-Y2) is 3 mm or less, and the external of the vehicle is such that the difference with respect to the centroid of the cross-section is 3 mm or less. The relative position of the side wall portion on the outer surface of the vehicle is set. This belt molding is characterized by satisfying any of the following conditions.

[0007] According to the invention of claim 1, the following effects are achieved: In the longitudinal direction of the belt molding If the ends of the main body are not curved, the centroid length X of the cross section and the upper end length Y1 or the lower end length of the main body The difference with Y2 (X-Y1) or (X-Y2), that is, the difference in length (this difference or The misalignment (which we will call "excess length") is practically zero. On the other hand, the covering part is relative to the main body. If the end of the main body is bent upwards or downwards after formation, the cross-sectional centroid length X is The length hardly changes before and after bending (even if the length changes, the change is minimal). (It is small) In contrast, the upper end length Y1 or lower end length Y2 of the main body is generally longer than the centroid length X of the cross-section It tends to become shorter (and therefore excess length is created). In the present invention, the curved shape of the terminal part of the main body In this configuration, the difference as excess length (X-Y1) or (X-Y2) should be kept to 3 mm or less. The main body is designed by setting the relative position of the outer surface of the outer side wall portion with respect to the center of gravity of the cross-section. This prevents or suppresses the formation of wrinkles in the covering portion of the belt molding.

[0008] The invention of claim 2 is a belt molding as described in claim 1, When the difference (X - Y1) between the sectional center-of-gravity length X and the upper-end length Y1 of the main body part or the lower-end length Y2 of the main body part, or (X - Y2), is divided by the sectional center-of-gravity length X and the resulting value is defined as the excess length ratio Z, in the case of (a) above, the excess length ratio Z = (X - Y1) / X is 0.015 or less, or, in the case of (b) above, the excess length ratio Z = (X - Y2) / X is 0.015 or less, which is characterized thereby.

[0009] According to the invention of claim 2, in addition to the effects of the invention of claim 1, the following effects are achieved. That is, the excess length ratio Z defined in the present application indicates the ratio of the excess length to the sectional center-of-gravity length. According to the present invention, in addition to satisfying the excess length condition of (a) or (b) described in claim 1, by keeping the excess length ratio Z at 0.015 or less (that is, 1.5% or less), it is possible to further prevent or suppress the occurrence of wrinkles in the covering part.

[0010] The invention of claim 3 is the belt mold according to claim 1 or 2, wherein the long main body part extends in the horizontal direction, and the terminals of the main body part are curved upward in the vertical direction. which is characterized thereby.

[0011] According to the invention of claim 3, in addition to the effects of the invention of claim 1 or 2, the following effects are achieved. That is, when the door panel to be attached has a design in which the terminals in the longitudinal direction (generally the horizontal direction) are curved upward, it becomes possible to attach the belt mold to the upper edge of such a door panel.

[0012] The invention of claim 4 is the belt mold according to claim 3, wherein an upper lip part that protrudes inward from the upper end of the inner side wall part of the vehicle is provided on the main body part.​​​ It is provided such that the base end portion of the upper lip portion covers a part of the covering portion. It is characterized by.

[0013] According to the invention of claim 4, in addition to the effects of the invention of claim 3, the following further effects are achieved: In other words, even if a wrinkle visible to the naked eye occurs in a part of the covering, that wrinkle can be removed from the upper part. The base end of the protruding part can be covered and concealed to maintain a good aesthetic appearance. [Effects of the Invention]

[0014] As described in detail above, according to the present invention, a belt in which at least a part of the main body is curved In the molding, the covering portion that covers the main body does not produce or is less likely to produce wrinkles resulting from the curvature formation. We can provide belt molding. [Brief explanation of the drawing]

[0015] [Figure 1] A schematic side view of the vehicle showing the mounting position of the belt molding. [Figure 2] A cross-sectional view along line II-II in Figure 1, showing one embodiment of the belt molding. [Figure 3] Rear view of the belt molding (side view as seen from inside the vehicle). [Figure 4] A schematic cross-sectional view illustrating the bending process using a bending forming apparatus. [Figure 5] A perspective view showing a conventional example where wrinkles have formed on the covered portion. [Figure 6] An explanatory diagram showing the dimensional relationships near the end of the belt molding. [Figure 7] A cross-sectional view, equivalent to Figure 2, showing another embodiment of the belt molding. [Modes for carrying out the invention]

[0016] Embodiments of the present invention will be described below with reference to the drawings. Figure 1 shows the right side of a 5-door hatchback passenger vehicle. As shown in Figure 1, The vehicle is equipped with a front door 1 and a rear door 2, and the rear door 2 has a window glass 3 in its upper half. It has a door panel 4 in which a window glass 3 can be stored in the lower half. Rear door The door panel 4, which makes up the lower half of part 2, has a belt line along its upper edge (beltline). The 5-inch tube is attached.

[0017] As shown in Figure 3, the belt molding 5 consists of a long extruded body 6 and an end cap 7. The end cap 7 is equipped with a clip portion 7a (known). The long extruded body 6 is then This is an extruded product formed by integrally extruding the main body, various lips, and covering parts, which will be explained below. More specifically, the continuous molded body extruded from the extrusion molding machine is cut to a predetermined length, and the cutting The extruded unit obtained by bending one end is shown in Figure 3. This is a molded body 6. By attaching an end cap 7 to the other end of the extruded molded body 6, the product Belt Molding 5 is now complete.

[0018] Figure 2 is a cross-section taken along line II-II in Figure 1, showing the main body portion 1 of the extruded body 6 that constitutes the belt molding. Figure 2 shows a cross-section of part 0 and its attached parts. As shown in Figure 2, the main body 10 is located opposite each other outside the vehicle. It has a side wall portion 11 and an interior side wall portion 12. The upper part of the exterior side wall portion 11 is the interior side wall portion 1 It slopes gently towards the top of 2, and the upper part of the outer side wall 11 is above the inner side wall 12. It is connected to the section. These side wall sections (11, 12) open the main body section 10 downwards. It has a roughly U-shaped cross-section. Also, at the lower end of the outer side wall portion 11 of the vehicle, on the inner side A folded projection 13 is provided, which is formed to fold back in that direction.

[0019] An inner lip 15a is provided on the inner wall surface of the inner side wall portion 12. Outer side wall An outer lip 15b is provided near the lower end of section 11, and the lower end of the outer side wall section 11 is folded back. A retaining lip 15c is provided at the end of the protrusion 13. Furthermore, the outer side wall portion 11 and the interior An upper lip 15d is provided near the joint with the side wall portion 12 (the upper end of both side wall portions). Yes, this upper lip 15d protrudes inward from the upper end of the inner side wall portion 12 of the vehicle. It is provided in such a way, and the base end portion of the upper lip (the left-leaning portion in Figure 2) is on the outer side wall portion 11 of the vehicle. It covers the upper part (top end). These lips 15a to d are generally known. Insert the flange (not shown) of the door panel 4 into the lower opening of the belt molding 5. By attaching it, the flange is sandwiched between the retaining lip 15c and the inner side wall portion 12 of the vehicle. Then, the belt molding 5 is attached to the door panel 4.

[0020] The material constituting the main body portion 10 of the extruded molded body 6 is a heat-deformable material. Plastic resins and thermoplastic elastomers are preferred. For example, olefin-based thermoplastic elastomers Polyethylene (TPO), styrene elastomer (TPS), polyvinyl chloride (PVC), poly Examples include propylene resin (PP). The preferred hardness of the main body is specified in JIS-K7215. The hardness of the HDD according to the Durometer (Type D) is 50-80. On the other hand, the main body 10 The four outer lips (15a~d) are softer and more elastically deformable than the main body 10. Materials (for example, relatively soft thermoplastic elastomers or thermoplastic resins) are used. The preferred hardness of the material is HD according to the durometer hardness (Type A) of JIS-K7215. The range is A50-90.

[0021] Furthermore, in the cross-section of the main body 10 as shown in Figure 2, the existence of a cross-sectional centroid (G) is assumed. This is possible (the centroid of the cross section is also called the "central center of the main body"). For example, the thickness, coordinates, and specific gravity of the constituent materials of each part (11, 12, 13, etc.) that makes up the main body. Based on this data, it can be calculated using CAD. And the cross-sectional centroid of the main body 10 The length along the longitudinal direction of (G) (the "cross-sectional centroid length (X)" which will be explained later) is also CA It can be calculated using D.

[0022] As shown in Figure 2, the outer surface of the outer side wall portion 11 (i.e., the surface or exposed surface facing outwards) The covering portion 14 is attached or tightly formed on the surface. Note that, as seen in the cross-section of Figure 2, the covering The lower end of section 14 (lower tip portion 14b) crosses over the lower end of the outer surface of the outer side wall portion 11 of the vehicle. It extends further down, covering a portion of the surface of the outer lip 15b of the vehicle. On the other hand, the covering part The upper end of 14 (upper tip portion 14a) reaches near the top of the upper end of the inner side wall portion 12. Furthermore, the upper end 14a of the covering portion is covered by the base end portion of the upper lip 15d. The upper tip portion 14a of the covering portion 14 is the upper part of the outer surface of the outer side wall portion 11 of the vehicle. It is sandwiched between the (min) and the base portion of the upper lip 15d.

[0023] The covering portion 14 is composed of a multilayer film. Specifically, the covering portion 14 is made of polyp Polypropylene layer + adhesive layer + polyethylene terephthalate (PET) layer + abrasion-resistant coating It is a sheet-like multilayer film made by laminating layers. This multilayer film is made of polypropylene The layer is attached to the main body 10 so that it is the bottom layer in contact with the surface of the outer side wall portion 11 of the vehicle. Yes, they are.

[0024] As mentioned above, the extruded units, which have been cut to a predetermined length after extrusion molding, are subjected to bending. There are various methods for bending, but as an example, the bending process shown in Figure 4 The bending process using the molding apparatus 20 is shown. The apparatus 20 in Figure 4 consists of an upper die 21, a lower die 22 and so The system is equipped with a jig 23 that can be positioned between the two molds. The bending procedure is generally as follows: 1. In the recessed or grooved portion along the longitudinal direction of the jig 23 (the jig before it is placed between the upper and lower molds), Insert the extruded molding unit that will be processed. 2. Heat the extrusion molding unit together with the jig 23 to a predetermined temperature. 3. When the jig 23 containing the extruded molding unit is slightly bent in a direction approximately perpendicular to the longitudinal direction, Then, while maintaining that bent state, it is sandwiched between the upper mold 21 and the lower mold 22 as shown in Figure 4. A bending load is applied. 4. The jig 23 is cooled while maintaining the state in which it is sandwiched between the upper mold 21 and the lower mold 22. 5. By separating the upper mold 21 and the lower mold 22 and removing them from the jig 23, the longitudinal section of the main body 10 is removed. An extruded body 6 is obtained in which a curved shape is imparted near the end of the direction.

[0025] Incidentally, long resin components exhibit certain tendencies when bent. This example illustrates that... In other words, the end of the belt molding body 10 to which the covering portion 14 is attached to the outer surface is, for example, on the upper side When bent in this direction (that is, vertically upward relative to the main body portion 10 which extends horizontally), The upper side of the body portion 10 (i.e., the outermost surface of the main body to which the covering portion is attached) tends to shrink in the longitudinal direction. For example, regarding the length along the longitudinal direction of the upper surface of the belt molding body 10, if we assume that Assuming that the length before bending (i.e., when it is straight) is Y0 and the length after bending is Y1, there is a tendency for Y1 to be slightly shorter (Y1 < Y0). Since the length (X) along the longitudinal direction at the position of the sectional center of gravity G of the main body 10 hardly changes before and after bending, for before bending, if we consider Y0 = X, the difference between the said X and the longitudinal length Y0 of the upper surface of the main body before bending: X - Y 0 can be considered to be almost zero (i.e., X - Y0 = 0). In contrast, after bending, the difference between the said X and the longitudinal length Y1 of the upper surface of the main body after bending: X - Y1 > 0, and an excess in the perimeter (this is called "extra length") will occur. In the conventional methods prior to the present application, no consideration was given to the above extra length. Therefore, when the above extra length becomes large, the deviation between the longitudinal length of the covering portion closely formed on the main body and the longitudinal length (Y1) of the upper surface of the main body after bending becomes significant. To compensate for this deviation, as shown in FIG. 5, wrinkles (wrinkles visible to the naked eye) inevitably occurred in the upper end region of the covering portion. In the present application, in consideration of this point, a unique method for preventing or suppressing the occurrence of wrinkles is adopted. Y0 = Xとみなすと、前記Xと、湾曲前の本体部上面の長手方向長さY0との差:X - Y 0はほぼゼロ(即ち、X - Y0 = 0)と考えてよい。これに対し、湾曲後においては、前 記Xと、湾曲後の本体部上面の長手方向長さY1との差:X - Y1>0となり、周長にお ける余り(これを「余長」と呼ぶ)が発生することになる。

[0026] In the conventional methods prior to the present application, no consideration was given to the above extra length. Therefore, when the above extra length becomes large, the deviation between the longitudinal length of the covering portion closely formed on the main body and the longitudinal length (Y1) of the upper surface of the main body after bending becomes significant. To compensate for this deviation, as shown in FIG. 5, wrinkles (wrinkles visible to the naked eye) inevitably occurred in the upper end region of the covering portion. In the present application, in consideration of this point, a unique method for preventing or suppressing the occurrence of wrinkles is adopted. ため、上記余長が大きくなると、本体部に密着形成されている被覆部の長手方向長さと、 湾曲後の本体部上面の長手方向長さ(Y1)との間のズレが顕著となり、そのズレを補償 するため、図5に示すように被覆部の上端領域に皺(肉眼で視認可能なほどのシワ)が不 可避的に発生していた。本願ではこの点を考慮して、皺の発生を防止又は抑制する独自の 手法を採用するものである。

[0027] In this embodiment, as shown in FIG. 6, when realizing the curved shape (the curved shape specified by parameters such as the bending angle α and the radius of curvature R) near the terminal of the belt mold specified by the orderer to conform to the curved design of the door panel 4 to be attached, bending was performed so as to satisfy the following conditions 1 and 2. ンに適合させるべく発注者が指定したベルトモールの端末付近における湾曲形状(曲げ角 度αや曲率半径Rなどのパラメータで特定される湾曲形状)を実現する際に、以下に記す 条件1及び2を満たすように曲げ加工を施した。

[0028] [Condition 1] The length along the longitudinal direction of the sectional center of gravity G of the belt mold main body part 10 (this is called the "sectional center of gravity length") is X, と呼ぶ)をXとし、 The upper end 14a of the covering portion on the outer surface of the outer side wall portion 11 of the vehicle, in close contact with the covering portion 14. The longitudinal length along the contact line that contacts the upper edge or the main body portion (this is referred to as " Let Y1 be the length of the upper end of the main body. Then, in the longitudinal direction of the belt molding, the end of the main body 10 is facing upward (i.e., lead When bending in a perpendicular upward direction, the length of the centroid of the cross-section X is such that the curved state of the end of the main body is such that The difference (X-Y1) between the upper end length Y1 of the main body and the cross-sectional centroid G is 3 mm or less. The relative position of the outer side wall portion 11 to the outer surface of the vehicle is set (that is, in contact with the upper end region of the covering portion 14). The position of the upper surface of the outer side of the outer side wall portion 11 that is in contact with the vehicle approaches the cross-sectional centroid G, The position of the upper edge was set.

[0029] [Condition 2] The difference (X-Y1) between the length of the centroid of the cross-section X and the length of the upper end of the main body Y1 is calculated using the length of the centroid of the cross-section X. When the value obtained by division is defined as the excess length ratio Z, The excess length ratio Z = (X - Y1) / X was set to be 0.015 or less.

[0030] According to this embodiment, when a curved shape is applied near the end of the belt molding, the above condition 1 And by bending the belt molding so that it satisfies condition 2, the outer side wall portion 11 of the belt molding is on the outside of the vehicle. This prevents wrinkles visible to the naked eye from forming in the upper end region of the covering portion 14 provided on the surface. It can be stopped or suppressed.

[0031] Furthermore, even if wrinkles visible to the naked eye appear in the upper end region of the covering portion 14, the wrinkles can be removed. The base portion of the side lip 15d can be covered and concealed.

[0032] [Example of changes] In the embodiments shown in Figures 1-4 and 6, the end of the main body 10 is facing upwards (i.e., the lead Although it is bent upwards in a straight direction, instead, the end of the main body 10 is turned downwards. The belt molding 5 may be formed by bending it (that is, downward in the vertical direction). For example, Figure 7 shows an example where the main unit terminal is curved downwards. The difference is that the lower end (lower tip 14b) of the covering portion 14 extends above the outer lip portion 15b. It does not extend and is located at the boundary between the outer lip portion 15b and the outer side wall portion 11. Even in this configuration, a downward bending force is applied to satisfy the conditions 1' and 2' described below. By performing this process, it is possible to prevent wrinkles visible to the naked eye from forming in the lower end region of the covering portion 14. Alternatively, it can be suppressed.

[0033] [Condition 1'] The length along the longitudinal direction of the center of gravity G of the cross-section of the belt molding body 10 (this is called the "center of gravity length of the cross-section") Let X be the one we call X. The lower end 14b of the covering portion on the outer surface of the outer side wall portion 11 of the vehicle, in close contact with the covering portion 14. The longitudinal length along the contact line that contacts the lower edge or the main body portion (this is referred to as " Let Y2 be the length of the lower end of the main body. Then, in the longitudinal direction of the belt molding, the end of the main body 10 is directed downwards (i.e., lead When bending in a perpendicular downward direction, the length of the centroid of the cross-section X is such that the curved state of the end of the main body is such that The difference (X-Y2) between the lower end length Y2 of the main body and the cross-sectional centroid G is 3 mm or less. The relative position of the outer side wall portion 11 to the outer surface of the vehicle is set (that is, in contact with the lower end region of the covering portion 14). The position of the lower edge of the outer surface of the outer side wall portion 11 that is in contact with the vehicle approaches the cross-sectional centroid G, The position of the lower edge was set.

[0034] [Condition 2'] The difference (X-Y2) between the length of the centroid of the cross-section X and the length of the lower end of the main body Y2 is calculated using the length of the centroid of the cross-section X. When the value obtained by division is defined as the excess length ratio Z, The excess length ratio Z = (X - Y²) / X was set to be 0.015 or less. [Explanation of Symbols]

[0035] 4 Door Panels 5 Belt Molding 6. Long extruded body 10 Main body 11. Exterior side wall section of the vehicle 12. Inner side wall of the vehicle 14 Covering part 14a Upper end of the covering (upper tip of the covering) 14b Lower end of the covering (the lower tip of the covering) 15d Upper lip

Claims

1. A belt molding that is installed along the upper edge of the door panel of a vehicle door, A length having an outer side wall portion and an inner side wall portion connected to and facing the outer side wall portion. The main body is a standard size, A covering that covers at least a portion of the outer surface of the outer side wall portion of the vehicle and is in close contact with the outer surface. Covering part, The main body is molded from a thermoplastic resin or thermoplastic elastomer, In a belt molding in which at least a portion in the longitudinal direction is curved toward a particular side, Let X be the length along the longitudinal direction of the centroid of the cross-section of the main body (hereinafter referred to as the "centroid length"). 、 The upper edge of the covering portion on the outer surface of the outer side wall portion of the vehicle, which is in close contact with the covering portion. or the longitudinal length of the main body portion along the contact line that contacts the upper edge (hereinafter referred to as "main body portion") Let Y1 be the length of the upper end (referred to as the "upper end length"). The lower edge of the covering portion on the outer surface of the outer side wall portion of the vehicle, which is in close contact with the covering portion. or the longitudinal length of the main body portion along the contact line that contacts the lower edge (hereinafter referred to as "main body portion") When the length of the lower end (referred to as the "lower end length") is Y2, (a) or (b) below, that is, (a) The end of the main body of the belt molding is curved upward in the longitudinal direction. Furthermore, in the curved state of the main body terminal, the cross-sectional centroid length X and the upper end of the main body The difference (X-Y1) from length Y1 is 3 mm or less, and the external dimensions of the vehicle are such that the difference from length Y1 is 3 mm or less. The relative position of the side wall portion on the outer surface of the vehicle is set, or, (b) The end of the main body of the belt molding is curved downward in the longitudinal direction. Furthermore, in the curved state of the main body terminal, the cross-sectional centroid length X and the lower end of the main body The difference with length Y2 (X-Y2) is 3 mm or less, the outer part of the vehicle with respect to the centroid of the cross-section The relative position of the side wall portion on the outer surface of the vehicle is set. A belt molding characterized by satisfying any of the following conditions.

2. The difference between the length of the centroid of the cross-section X and the length of the upper end of the main body Y1 or the length of the lower end of the main body Y2 (X - Y1) or When the excess length ratio Z is defined as the value obtained by dividing (X - Y2) by the centroid length X of the cross section, In the case of (a) above, the excess length ratio Z = (X - Y1) / X is 0.015 or less. Or, In the case of (b) above, the excess length ratio Z = (X - Y²) / X is 0.015 or less. The belt molding according to claim 1, characterized by the following:

3. The aforementioned elongated main body extends horizontally, and the end of the main body is directed upward in the vertical direction. The belt molding according to claim 1 or 2, characterized in that it is curved.

4. The main body portion has an upper lip portion that protrudes toward the interior of the vehicle from the upper end of the interior side wall portion. It is provided such that the base end portion of the upper lip portion covers a part of the covering portion. The belt molding described in claim 3, characterized by its features.

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