JP2001199286A - Vehicular roof molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular roof molding having a high engaging property to a groove portion of a vehicular roof even under the condition of a low temperature, preventing the reduction in the engaging property even if dispersion is produced in the width of the groove portion, and having small leaning of an equipped position. SOLUTION: This vehicular roof molding comprises a design portion 11, a body portion 15 formed on the back side of the design portion, and a lip portion 21 formed protrusively from the side surfaces 17, 18 of the body portion. When the body portion and the lip portion are fitted in a groove portion 31 of a vehicular roof 30, the tip end side of the lip portion is pressed against the inner wall surfaces 34, 35 of the groove portion of the vehicular roof to bend along the inner wall surfaces. The lip portion has an easily deforming portion which is easily deformed by bending and softer than the other part, at the tip end side thereof. The easily deforming portion is composed of a polymeric material having a brittle point not more than -50 degree.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roof molding for a vehicle mounted in a groove of a roof of a vehicle body.

[0002]

2. Description of the Related Art As shown in FIG. 4 and FIG. 5 showing a cross section taken along line 5-5, in a body roof 61 of a vehicle 60 such as an automobile, a groove 65 is formed at a joint between a center panel 62 and a side panel 63. In some cases, the seam is concealed by mounting a roof molding 70 in the groove 65.

The roof molding 70 is made of a long product made of synthetic resin formed by extrusion molding or the like.
And a trunk portion 72 extending downward from the back surface of the design portion 71
And lip portions 7 formed on both side surfaces of the lower portion of the body portion 72
Those with 3,74 are common. The lip 7
3, 74 has a substantially uniform thickness from the base to the tip, or consists of a slightly tapered, and,
The distance between the tips of the lip portions 73 and 74 is the groove 6 of the roof 70.
5 is larger than the groove width. Usually, the design part 71
The lip portions 73 and 74 are often made of a soft vinyl chloride resin while the body portion 72 is made of a semi-hard vinyl chloride resin. A metal core 75 is appropriately embedded in the body 72. In the illustrated example, lip portions 73 and 74 protrudingly formed on both side surfaces of the lower portion of the body 72.
Are symmetrical, but in some cases, the two lip portions may have different shapes.

The roof molding 70 is mounted in the groove 65 by being fitted into the groove 65 of the roof 61. At this time, the tip sides of the lip portions 73 and 74 come into contact with the inner wall surfaces 66 and 67 of the groove portion 65 and bend along the inner wall surfaces 66 and 67, and the restoring force of the lip portions 73 and 74 against the bending. The tip ends of the lip portions 73 and 74 are pressed against and adhere to the inner wall surfaces 66 and 67 of the side groove portion 65, and the roof molding 70 is fixed to the groove portion 65.

However, in the conventional roof molding 70, as described above, the lips 73 and 74 are often made of a soft vinyl chloride resin. Lip 7 in groove 65 of
The elasticity of the lip portions 73 and 74 is impaired, and the force by which the lip portions 73 and 74 press the inner wall surfaces 66 and 67 of the groove portion 65 is significantly reduced. Therefore, when an upward force is applied to the roof molding 70 by, for example, touching the roof molding 70 at the time of scraping snow accumulated on the roof 61 or washing the car in a low temperature state, the roof molding 70 There is a possibility that it will fall off from the groove 65. In addition, when the lip portions 73 and 74 made of the soft vinyl chloride resin are left in a bent state for a long time, the restoring force gradually decreases due to deterioration with time, whereby the roof molding 70 comes off from the groove portion 65. It will be easier.

The angle between the inner wall surfaces 66, 67 of the groove 65 and the bottom surface 68 is less than 90 °, and the groove width X of the groove 65 is narrower on the inlet side than on the bottom surface 68 side of the groove. It is conceivable that the roof molding 70 is hardly detached from the groove 65. However, the narrower the groove width is on the entrance side of the groove 65, the more difficult it is for the roof molding 70 to come off from the groove 65.
Is difficult to fit. Therefore, there is a limit to the adjustment of the groove width X from the viewpoint of the mounting workability of the roof molding 70,
The effect of preventing the roof molding 70 from coming off cannot be sufficiently obtained.

Further, the groove width 65 of the roof may vary in the groove width X when the vehicle is assembled, and the bending positions of the lip portions 73 and 74 of the roof molding 70 differ depending on the groove width. Variations occur in the pressing force (restoring force) of the lips 73, 74 against 66, 67. Therefore, the roof molding 70 with respect to the groove 65
There is also a problem that it is difficult to obtain a fixed mounting state.

[0008] In addition, in the case of the conventional roof molding 70, when the roof molding 70 is mounted in the groove portion 65, as shown in FIG.
(A), the central panel 62 is located just above the groove 65.
When the roof molding 70 is fitted into the groove 65 from above, and when the roof molding 70 is fitted from above the side panel 63 as shown in FIG. different. Therefore, the design portion 71 of the roof molding 70 tends to be biased toward the center panel 62 or the side panel 63 with respect to the regular position, and not only the appearance is impaired, but also after the lip 73 ,
74 does not work properly, and the roof molding 70
There is also a problem that it is easier to deviate from 5 above.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has a high locking property with respect to a groove portion of a vehicle body roof even under a low temperature condition. An object of the present invention is to provide a roof molding for a vehicle, in which a locking property with respect to a groove portion is not deteriorated, and a deviation of a mounting position is small.

[0010]

That is, the invention of claim 1 comprises a design part, a body part formed on the back side of the design part,
A lip portion protruding from a side surface of the body portion, and when the body portion and the lip portion are fitted into the groove portion of the vehicle body roof, the tip side of the lip portion is pressed against the inner wall surface of the groove portion of the vehicle body roof. A roof molding for a vehicle that bends along the inner wall surface, wherein the lip portion has an easily deformable portion that is softer and more easily bent and deformed than the other portion on the tip side thereof,
The easily deformable portion is made of a polymer material having an embrittlement temperature of −50 ° C. or lower.

According to a second aspect of the present invention, in the first aspect, the thin lip portion is formed between the distal end portion and the base portion of the easily deformable portion of the lip portion.

Furthermore, the invention of claim 3 is characterized in that, in claim 1 or 2, the outer peripheral surface of the tip of the lip is formed in a curved shape.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a cross-sectional view showing a roof molding according to an example of the present invention, FIG. 2 is a cross-sectional view showing a state where the roof molding is mounted in a groove, and FIG. It is sectional drawing which shows the state which performed.

The roof molding 10 shown in FIG. 1 and FIG.
It is mounted (fitted) into the groove 31 of the vehicle body roof 30, is formed by a known extrusion molding, and has a predetermined length according to the length of the groove 31. The body roof 30
Is composed of a center panel 30a and a side panel 30b, and the side panel 30a extends along the side edge of the center panel 30a.
b is overlapped and welded, and the groove 31 is formed at the joint between the center panel 30a and the side panel 30b. In this example, step portions 32 and 33 are formed above the groove portion 31 and inner wall surfaces 34 and 35 and a bottom surface 36 serving as a roof molding locking surface of the groove portion 31.
Is less than 90 °, and is formed as a so-called negative angled groove.

The roof molding 10 includes a design part 11, a body part 15, and lip parts 21A and 21B (21). The design portion 11 is made of a somewhat hard synthetic resin such as semi-rigid vinyl chloride resin (PVC) or olefin-based thermoplastic elastomer (TPO). When the roof molding 10 is mounted in the groove portion 31, the design portion 11 is in contact with the center panel 30a. The edge of the design portion 11 is sized to be placed on the steps 32 and 33 of the groove 31 so as to cover the joint with the panel 30b.

The body portion 15 is formed on the back side of the design portion 11 and, like the design portion 11, has a semi-rigid vinyl chloride resin (PVC) or an olefin-based thermoplastic elastomer (TP).
O) and the like. In addition, a metal core 16 made of stainless steel, iron, aluminum, or the like is embedded in the body portion 15 of this example in order to suppress expansion and contraction of the roof molding 10 due to heat.

The lip portions 21A and 21B (21) are provided on at least one side surface of the body portion 15, in this example, on both side surfaces 1
It is formed to protrude from 7,18. As can be understood from FIG. 2, when the roof molding 10 is mounted on the groove 31 of the vehicle body roof 30 of the roof molding 10, the front end side thereof is pressed against the inner wall surfaces 34 and 35 of the groove 31 and the inner wall surface 3.
4 and 35, and a restoring force acts outward from the tip side of the lip portion 21 on the inner wall surfaces 34 and 35 of the groove portion 31, whereby the roof molding 10 is applied to the inner wall surfaces 34 and 35 of the groove portion 31. Locked.

The lip portion 21 has an easily deformable portion 22 which is softer than the other portions and is easily bent and deformed at the tip end side. The easily deformable portion 22 is made of a polymer material having an embrittlement temperature of −50 ° C. or less. Examples of the polymer material include a chlorinated ethylene copolymer, an olefin-based thermoplastic elastomer (TPO), and a nitrile rubber-based elastomer. Preferably, as the polymer material, a material having a small compression set, specifically, a material having a compression set (70 ° C., 22 Hrs) of 45% or less is good. Then, the progress of the temporal deterioration (plastic deformation) in the easily deformable portion 22 can be delayed.

Further, in this example, as can be understood from the drawing, the lip portion 21 on the side of the root portion 23 (the easily deformable portion 2).
2) are made of the same material as the body portion 15 and are integrally formed from the side surfaces 17, 18 of the body portion 15. As described above, if a material having a hardness (initial hardness) harder than that of the easily deformable portion 22 is selected as a constituent material of a portion adjacent to the easily deformable portion 22, it is surely deformed when the roof molding 10 is mounted on the groove portion 31. The lip portion 21 is bent and deformed by the easy portion 22, so that the locking property of the roof molding 10 with respect to the groove 31 is further improved, and the deviation of the mounting position of the roof molding 10 can be reduced. Note that the base portion 23 side of the lip portion 21 does not necessarily need to be made of the same material as the trunk portion 15. That is, the entire lip portion 21 protruding from the side surfaces 17 and 18 of the body portion 15 may be an easily deformable portion made of a material softer than the body portion 15.

Here, the lip portion 21 of the roof molding 10
The easy-to-deform portion 2 is inserted into the groove 31 so as to be inserted into the groove 31.
The width K between the tips of the root portions 23 excluding 2 must be equal to or less than a value [W1−1.0 mm] obtained by subtracting an allowable dimensional error of 1.0 mm from the regular groove entrance width W1. When the roof molding 10 is mounted on the groove 31, the lip 21
The two lip portions 21A, 21B before bending deformation so that the distal end sides of A, 21B can contact the inner wall surfaces 34, 35 of the groove portion 31.
The distance L between the front end portions of B is the groove portion 31 of the roof molding 10.
It must be equal to or greater than a value obtained by adding an allowable dimensional error of 1.0 mm [W2 + 1.0 mm] to the regular groove width W2 at the final position of the lip portion (the rear position of the lip portion) after mounting on the lip portion. Further, the length M of the easily deformable portion 22 is adjusted to the panel depth (from the base position s of the lip portion to the center so that the lip portions 21A and 21B do not protrude outside the groove portion 31 when the roof molding 10 is mounted in the groove portion 31. (Distance to the R bottom position t of the panel 30a)
W3 minus the allowable dimensional error 0.5 mm [W3-0.
5 mm] or less.

The constituent material of the easily deformable portion 22 is as follows.
It is preferable to select a material that is compatible with the constituent material of the portion adjacent to the easily deformable portion 22 (the portion of the lip portion 21 on the root portion 23 side or the body portion 15). Specifically, when the material of the portion adjacent to the easily deformable portion 22 is a vinyl chloride resin, the material of the easily deformable portion 22 is a chlorinated ethylene copolymer or a rubber-based elastomer, and the material of the portion adjacent to the easily deformable portion 22 is When is an olefinic thermoplastic elastomer, the material of the easily deformable portion 22 is also preferably an olefinic thermoplastic elastomer. By doing so, each part can be integrally molded by known co-extrusion molding, which is advantageous in that the production efficiency is improved.

As described above, the easily deformable portion 2 of the lip portion 21
If the embrittlement temperature of (2) is -50 ° C or lower, the elasticity of the easily deformable portion 22 is not impaired even in a low temperature state (about 10 ° C to -10 ° C) such as a cold region or winter, that is, the lip portion 21 The pressing force (restoring force) acting on the inner wall surfaces 34 and 35 of the groove portion 31 does not decrease, and as a result, the lockability of the roof molding 10 with respect to the groove portion 31 under a low temperature condition is improved, so Even when an upward force is applied to the roof molding 10 attached to the groove 31 of the vehicle body roof 30, the roof molding 10 does not easily fall off the groove 31. In addition, a material having an embrittlement temperature of −50 ° C. or lower has a low glass transition point, and when the ambient temperature shifts from a low temperature to a high temperature, the material itself hardly undergoes plastic deformation. It is possible to prevent the locking property of the groove 10 from being deteriorated, and it is possible to maintain the good locking property for a long period of time.

In this embodiment, the tip 22 of the easily deformable portion 22 of the lip 21 is provided.
A thin-shaped suddenly changing portion 22c is formed between a and the base 22b. By doing so, the bending fulcrum of the easily deformable portion 22 when the roof molding 10 is attached to the groove portion 31 is within the range from the shape suddenly changing portion 22c to the base portion 22b. Thereby, it is possible to minimize the deviation of the mounting position of the roof molding 10 due to the variation in the mounting direction of the roof molding as in the related art. In addition, when the thin shape suddenly changing portion 22c is formed in the easily deformable portion 22 as described above, when a force in the upward pull-out direction is applied to the roof molding 10 when the roof molding 10 is mounted as shown in FIG. The tip 22a of the easily deformable portion 22 is inverted, and the tip 22a is strongly pressed against the inner wall surfaces 34, 35 of the groove 31. Therefore, a large pressing force acts on the inner wall surfaces 34 and 35 of the groove 31 from the easily deformable portion 22, and the roof molding 10 is less likely to fall off from the groove 31.

Further, in this embodiment, as in the third aspect of the present invention, the tip shape of the lip portion 21, that is, the outer peripheral surface shape of the tip portion 22a of the easily deformable portion 22 is formed in a curved shape. Thereby, as described above, the roof molding 1
When a force in the pull-out direction is applied to the front molding 0, the tip 22a of the lip 21 is smoothly inverted, so that the roof molding 1
0 is more difficult to drop. In addition, since the contact area between the tip portion 22a of the lip portion 21 and the inner wall surfaces 34 and 35 of the groove portion 31 is reduced, the roof molding 10 can be smoothly inserted into the groove portion 31 and the groove portion of the roof molding 10 There is an advantage that the assembling work to the base 31 becomes easy. In the illustrated example, the shape of the tip portion 22a of the lip portion 21 is not limited to a circular curved surface shape, but may be a polygonal shape such as a triangular shape.

Further, if the easily deformable portion 22 of the lip portion 21 is formed as described above, even if the groove width of the groove portion 31 varies, it is possible to solve the problem caused by the variation. That is, even when the groove width of the groove portion 31 becomes wider or narrower than the regular dimension W2, the lip portion 21 bends with the thin portion between the suddenly changing portion 22c and the base portion 22b as a fulcrum. Since there is little change, the lip portion 2 against the inner wall surfaces 34 and 35 of the groove portion 31
1, the restoring force acts sufficiently, and the locking property of the roof molding 10 with respect to the groove 31 is sufficient.

In this example, the shapes of the lip portions 21A and 21B protruding from both side surfaces 17 and 18 of the body portion 15 are symmetrical left and right, but in some cases, the two lip portions 21A and 21B. May be formed in different shapes.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Representative examples of the embodiments of the present invention are shown below. In Examples 1 and 2, a chlorinated ethylene copolymer was used, in Example 3, rubber-containing PVC was used, and in Example 4, a polyolefin-based thermoplastic elastomer (TPO) was used as the polymer material of the easily deformable portion of the lip portion. . Further, in Examples 1 to 3, PVC was used as a material constituting other portions, that is, the design portion, the body portion, and the portion other than the easily deformable portion of the lip portion. In Example 4, the design portion, the body portion, and the lip portion were used. TPO is used as a material constituting a portion other than the easily deformable portion. Table 1 shows the physical properties of each part of the roof molding in each embodiment. In Table 1, the measurement of the embrittlement temperature, compression set (70 ° C., 22 Hrs) and hardness (instantaneous value) are performed based on JIS K6301.

[0028]

[Table 1]

[0029]

As shown and described above, according to the roof molding of the present invention, even in a low temperature state, the locking property with respect to the groove of the vehicle body roof is sufficient. Further, if the easily deformable portion of the lip portion is formed as in the inventions of claims 2 and 3, even if the groove width of the groove portion varies, the locking property with respect to the groove portion due to the variation can be reduced. It is possible to avoid the occurrence of mounting failure and the like, and to improve the workability of assembling to the groove, and to reduce the deviation of the mounting position of the roof molding.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a roof molding according to an example of the present invention.

FIG. 2 is a cross-sectional view showing a state where the roof molding is mounted in a groove.

FIG. 3 is a cross-sectional view illustrating a state in which a force in a pull-out direction acts on a roof molding attached to a groove.

FIG. 4 is a perspective view of a vehicle to which a conventional roof molding is attached.

FIG. 5 is a sectional view taken along line 5-5 in FIG. 4;

FIG. 6A is a cross-sectional view showing a state in which a conventional roof molding is installed diagonally from a center panel side into a groove, and FIG. 6B is a state in which the roof molding is installed diagonally from a side panel side. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Roof molding 11 Design part 15 Body part 17, 18 Side surface of body part 21A, 21B Lip part 22 Easy deformation part 22a Tip part of easy deformation part 22b Base part of easy deformation part 22c Thin shape sudden change part of easy deformation part 30 Body Roof 31 Groove 34, 35 Inner wall of groove

Claims (3)

[Claims] 1. A design portion, a body portion formed on the back side of the design portion, and a lip portion protruding from a side surface of the body portion, wherein the body portion and the lip portion are grooves of a vehicle body roof. A front end side of the lip portion is pressed against an inner wall surface of a groove portion of the vehicle body roof and is bent along the inner wall surface when the lip portion is fitted into the lip portion; A roof molding for a vehicle, comprising: an easily deformable portion that is softer and more easily bent and deformed, and the easily deformable portion is made of a polymer material having an embrittlement temperature of −50 ° C. or lower. 2. The vehicular roof molding according to claim 1, wherein a thin-walled rapidly changing portion is formed between the tip portion and the base portion of the easily deformable portion of the lip portion. 3. The roof molding for a vehicle according to claim 1, wherein an outer peripheral surface of a front end portion of the lip portion is formed in a curved shape.