JP2023158716A - Belt-molding of vehicle - Google Patents

Abstract

To suppress a wrinkle of a closure lip from occurring in a resin belt-molding with curvature.SOLUTION: A belt molding 26 comprises: a molding body 32 which is fixed to a door outer panel 24; a seal lip 34 which protrudes from the molding body 32 and contacts with a window glass 22 at the tip thereof; and a closure lip 42 which extends from the molding body 32 to the seal lip 34 contacting with the window glass 22. Within a range of a bend part of the belt molding 26, the arc length of the closure lip 42 at a bottom 42b of the closure lip 42 is 1 to 1.0033 times the arc length of the closure lip 42 at a tip 42a of the closure lip 42.SELECTED DRAWING: Figure 3

Description

The present invention relates to a belt molding disposed along the lower edge of a side window of a vehicle, and particularly to a belt molding made of resin.

Window molding is placed around the edges of vehicle windows to fill the gap between the door or vehicle body and the window glass. Window moldings placed along the lower edges of vehicle side windows, the so-called belt line, are sometimes referred to as belt moldings. The belt molding (belt molding 10) shown in Patent Document 1 below includes a molding body (vehicle outer side and vehicle inner side wall parts 11, 12, connecting part 13) attached to a door panel (2), and a molding body (12). It has an upright seal lip (14) and a closing lip (decorative lip 17). The closing lip (17) closes the groove-shaped gap formed between the molding body (12) and the seal lip (14) to make it inconspicuous. Note that the member names and codes in parentheses above are those used in Patent Document 1 below, and are not related to the member names and codes used in the embodiment of the present application.

JP2022-38888A

When the belt line of a vehicle is curved from a design standpoint, it is necessary to curve the belt molding to match the curvature of the belt line. First, a straight material is produced, and then a predetermined portion is curved to produce a curved belt molding. In resin belt molding, when a straight material is bent, wavy wrinkles may occur on the closing lip, which may impair the appearance.

The present invention aims to suppress the formation of wrinkles in the closing lip in curved belt moldings.

The belt molding for a vehicle according to the present invention is a belt molding made of resin that is placed along the lower edge of a side window of a vehicle, and includes a molding body fixed to the edge of the window, and a tip portion that protrudes from the molding body. and a closing lip extending from the molding body toward the sealing lip in contact with the window glass. Furthermore, the belt molding includes a curved portion corresponding to the curved portion where the edge of the window is concave, and in the range of the curved portion, the arc length of the closing lip at the base of the closing lip is equal to the tip of the closing lip. The arc length of the closing lip is 1 times or more and 1.0033 times or less.

By setting the arc length of the closure lip at the base of the closure lip to 1 time or more and 1.0033 times or less than the arc length of the closure lip at the tip of the closure lip, it is possible to use a straight material in the belt molding manufacturing process. Wrinkling of the closing lip during bending is suppressed.

1 is a side view of a vehicle with a curved beltline. FIG. It is a perspective view showing belt molding attached to a rear door. It is a figure which shows the cross section orthogonal to the longitudinal direction of belt molding. It is a figure which shows the curved part of belt molding. It is an enlarged view showing the vicinity of the closing lip of the belt molding. FIG. 3 is a diagram illustrating dimensional specifications in association with evaluations of wrinkles and lip reaction force.

Embodiments of the present invention will be described below with reference to the drawings. In the following description, unless otherwise specified, words expressing relative positions and directions, such as front, rear, left, right, top and bottom, refer to relative positions and directions with respect to the vehicle. In addition, in the left-right direction (width direction) of the vehicle, the side closer to the center line extending in the longitudinal direction of the vehicle is referred to as the inner side in the vehicle width direction, and the side farther away from the center line is referred to as the outer side in the vehicle width direction. In each figure, arrow FR is directed forward, arrow UP is directed upward, arrow LH is directed leftward, and arrow OUT is directed outward in the vehicle width direction.

FIG. 1 is a diagram showing a side view of a vehicle 10. As shown in FIG. The vehicle 10 is a so-called four-door vehicle that includes two side doors on the left and right sides, that is, a front door 12 for the front seats and a rear door 14 for the rear seats. The rear door 14 includes a door panel 16 and a door frame 18 located above the door panel 16 and fixed to the door panel 16. A window 20 is defined by the upper edge of door panel 16 and door frame 18 . A window glass 22 is arranged in the window 20. Window glass 22 can be lowered to be at least partially housed within door panel 16, thereby opening window 20. The door panel 16 includes a door outer panel 24 located on the outside in the vehicle width direction and a door inner panel (not shown) located on the inside in the vehicle width direction, and a window glass 22 is housed between the door outer panel 24 and the door inner panel. Ru. A molding 26 is arranged on the upper edge of the door outer panel 24 along the upper edge. The front door 12 also has a similar structure to the rear door 14 described above.

The line formed by the lower edge of each window of the front door and the rear door, that is, the upper edge of the door panel, is sometimes called a belt line. As shown in FIG. 1, the belt line 28 of the vehicle 10 extends approximately horizontally, but is inclined at the rear end so that it is higher at the rear. The belt line 28 has a concave curved portion between a horizontally extending portion and an inclined portion. The aforementioned molding 26 is placed on this belt line 28. Hereinafter, the molding 26 will be referred to as a belt molding 26.

FIG. 2 is a perspective view showing the belt molding 26. As described above, the belt line 28 is sloped at the rear end so as to be higher at the rear, and has a curved portion at the transition from the horizontal portion to the sloped portion. Belt molding 26 has a curved portion 30 that corresponds to the curved portion of belt line 28 . Belt molding 26 has substantially the same cross-sectional shape except for the front and rear ends, including the attached cap.

FIG. 3 is a diagram showing a cross-sectional shape of the belt molding 26 perpendicular to the longitudinal direction. The belt molding 26 includes a molding body 32 that engages with the upper edge of the door outer panel 24 that defines the lower edge of the window 20, and an upper seal lip 34 and a lower seal lip 36 that protrude from the molding body 32 toward the window glass 22. has. The upper part of the molding body 32 has a downwardly open U-shape, and the belt molding 26 is fixed to the upper edge of the door outer panel 24 by sandwiching the upper edge of the door outer panel 24 with this part. The tips of the upper and lower seal lips 34, 36 are in contact with the window glass 22, and due to the contact, the tips are directed diagonally upward. Flocked portions 38 and 40 are provided at portions of the upper and lower seal lips 34 and 36 that contact the window glass 22. The flocked portions 38 and 40 may be formed by pasting a sheet on the surface of which short fibers are flocked to the upper and lower seal lips 34 and 36, and the upper and lower seal lips 34 and 36 may be surface-treated. It may be formed by

When the upper seal lip 34 contacts the window glass 22 and the tip thereof faces diagonally upward, a groove is formed between the upper seal lip 34 and the molding body 32. In order to make this groove less noticeable, a closing lip 42 is provided which covers this groove. The height of the closing lip 42, that is, the amount of protrusion from the molding body 32, is about 2 mm. The closing lip 42 is provided near the upper edge of the surface of the molding body 32 facing the window glass 22, and extends from there toward the upper seal lip 34 in contact with the window glass 22.

A shielding lip 44 for covering a gap with the door outer panel 24 is provided at the lower edge of the molding body 32 on the outside in the vehicle width direction.

FIG. 4 is an enlarged view of the curved portion 30 of the belt molding 26 and its surroundings, as seen from a direction perpendicular to the surface of the window glass 22. FIG. The curved portion 30 is provided between the radii shown by two dashed lines in FIG. 4 . The angle between these two radii is about 20°. The curved portion 30 is curved with a radius of curvature R.

FIG. 5 shows details of the belt molding 26, in particular the closure lip 42. The tip 42a and root 42b of the closure lip 42 are also curved at the curved portion 30, as shown in the right-hand region of FIG. In the right-hand region of FIG. 5, only the tip 42a and the root 42b are shown for clarity. In the range of the curved portion 30, the arc length of the closing lip 42 at the tip 42a of the closing lip 42 is referred to as a tip arc length a, and the arc length of the closing lip 42 at the root 42b is referred to as a root arc length b.

The belt molding 26 is made of resin, but the molding body 32 and each lip 34, 36, 42, 44 are made of resin having different hardness. A relatively hard resin is used for the molding body 32, and a relatively soft and easily deformable resin is used for the upper and lower seal lips 34, 36, the closing lip 42, and the shielding lip 44.

In producing the belt molding 26, two types of hard and soft resins are extruded in two colors to produce a straight material with the cross-sectional shape shown in FIG. The belt molding 26 is formed and has a curved portion. The flocked portions 38 and 40 may be formed during the manufacturing process of the linear material. After forming the curved portion 30, retrofit parts such as end caps are attached. When bending a straight material, the closure lip 42 may not curve smoothly along the curvature of the belt line 28, and wavy wrinkles may occur in the direction along this curvature. If the tip arc length a and the root arc length b of the closing lip 42 when curved are different, there will be a difference in the length change in the longitudinal direction of the belt molding 26 before and after bending between the tip and the root of the closing lip 42. This causes the closure lip 42 to wrinkle. In this belt molding 26, the difference between the tip arc length a and the base arc length b is set within a range in which wrinkles do not occur.

Figure 6 shows the evaluation of wrinkles with respect to the arc length ratio b/a, and if the arc length ratio b/a is 1 or more and 1.0033 or less, wrinkles are at an acceptable level. I understand. In other words, if the arc length b of the closing lip 42 at the base 42b is at least 1 time and at most 1.0033 times the arc length a at the tip 42a, wrinkles can be suppressed to an acceptable level. To achieve a predetermined arc length ratio, the direction in which closure lip 42 extends from molding body 32 is adjusted. When the extending direction of the closing lip 42 is perpendicular to the surface of the window glass 22, the tip arc length a and the root arc length b are equal; when tilted upward from this orthogonal direction, the root arc length b becomes larger than the tip arc length a. becomes longer. By adjusting the direction in which the closing lip 42 extends, a desired arc length ratio b/a can be achieved.

The explanation will be returned to FIG. 3. When the upper seal lip 34 comes into contact with the rising window glass 22, it rotates counterclockwise in FIG. 3 so that its tip is lifted. At this time, when the closing lip 42 comes into contact with the back surface of the upper seal lip 34, the sealing reaction force, which is the force that the upper seal lip 34 receives from the window glass 22, increases. In this belt molding 26, the angle at which the closing lip 42 extends is determined so that the sealing reaction force does not become significantly large.

As shown in FIG. 3, the closing lip 42 is angled slightly upward relative to the orientation perpendicular to the window glass 22. As shown in FIG. In the cross section shown in FIG. 3, the dimension between the tip 42a and the base 42b of the closing lip 42 in the direction along the surface of the window glass 22 is h. FIG. 6 shows the evaluation of the lip reaction force with respect to the dimension h, and it can be seen that if the dimension h is 0.6 mm or more, the requirements for the lip reaction force are satisfied.

10 vehicle, 12 front door, 14 rear door, 16 door panel, 18 door frame, 20 window, 22 window glass, 24 door outer panel, 26 belt molding, 28 belt line, 30 curved part, 32 molding body, 34 upper seal lip, 36 Lower seal lip, 38, 40 flocking part, 42 closing lip, 42a tip of closing lip, 42b root of closing lip, 44 shielding lip, a tip arc length, b root arc length.

Claims (1)

A resin belt molding placed along the lower edge of a side window of a vehicle,
a molding body fixed to the edge of the window;
a seal lip that protrudes from the molding body and contacts the window glass at its tip;
a closing lip extending from the molding body toward the sealing lip in contact with the window glass;
has
The belt molding includes a curved portion corresponding to a concave curved portion of the window edge, and in the range of the curved portion, the arc length of the closing lip at the base of the closing lip is The arc length of the closing lip at the tip is 1 times or more and 1.0033 times or less,
Vehicle belt molding.

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