JP2000142267A - Opening trim - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opening trim capable of following the bent shape of a corner part in an opening edge part of a vehicle while being suitable for recycling treatment. SOLUTION: A trim part 12 is formed of thermoplastic elastomer, and core material 12 embedded in the trim part 12 is formed of thermoplastic resin. The core material 12 comprises a plurality of U-shape constituent pieces 18 arranged parallel at spaces in the longitudinal direction of an opening trim, and connecting parts 20 for connecting the constituent pieces 18. The adjacent constituent pieces 18 are connected only at a part of U-shape so as to be able to follow the bent shape of a corner part C in a vehicle opening edge part 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening trim (including an opening weatherstrip provided with a seal portion) attached to an opening edge of a vehicle such as an opening of an automobile.

[0002]

2. Description of the Related Art An opening trim is attached to an opening edge of a vehicle such as an opening edge of a door or a trunk. As shown in FIG. 1 is provided with a trim portion 102 having a substantially U-shaped cross section,
2, a reinforcing core material 104 is embedded.

Conventionally, rubber or thermoplastic resin is used as the material of the trim portion 102, and metal such as iron is used as the material of the core member 104. As described above, the trim portion 102 and the core member 104 are used. Is difficult to recycle when manufactured from a different material.

[0004] In this regard, Japanese Patent Application Laid-Open No. 7-246646 discloses that a thermoplastic elastomer is used as a material of a trim portion and a thermoplastic resin is used as a material of a core material to facilitate recycling. I have.

However, since the opening edge 1 of the vehicle to which the opening trim is attached usually has a corner C as shown in FIG. 15, the opening trim may follow the bent shape of the corner C. Although required, the above publication does not disclose a configuration for following the bent shape of the corner portion. If it is not possible to follow the corner C of the opening edge 1 of the vehicle, the opening trim peels off from the flange 2 and floats, causing poor appearance, impairing the sealing function provided by the opening trim, or in the worst case. Has a problem that the entire opening trim falls off the flange 2 from the floating portion.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide an opening trim suitable for recycling processing and capable of following a bent shape of a corner portion at an opening edge of a vehicle.

[0007]

An opening trim according to a first aspect of the present invention has a trim portion made of a thermoplastic elastomer having a substantially U-shaped cross section and attached to an opening edge of a vehicle, and is embedded in the trim portion. And a plurality of substantially U-shaped components arranged side by side at intervals in the longitudinal direction of the opening trim, and a connection connecting these components. And the adjacent component pieces are connected only at a part of the U-shape.

According to the opening trim of the first aspect, since the thermoplastic elastomer is used as the material of the trim portion and the thermoplastic resin is used as the material of the core material embedded in the trim portion, the recycling is easy. is there. Further, since a metal material such as iron is not used for the core material, rust does not occur and the product weight is light. When a metal material is used for the core material, rust prevention treatment is required to prevent rust from the product terminal.However, since rust does not occur as described above, rust prevention treatment is not required, and production costs are reduced. Can be suppressed. In addition, production costs are suppressed because recycling is easy. According to the first aspect, the plurality of substantially U-shaped constituent pieces constituting the core material are connected by the connecting portion that connects the mutually adjacent constituent pieces only at a part of the U-shape. The shape is such that the material can follow the bent shape. Therefore, the opening trim according to claim 1 can follow the bent shape of the corner portion at the opening edge of the vehicle.

According to a second aspect of the present invention, in the opening trim according to the first aspect, the core material is formed by bending a meandering wire member made of a thermoplastic resin at two places in the width direction along the longitudinal direction. , And is formed in a substantially U-shape.

According to a third aspect of the present invention, in the opening trim according to the first aspect, the core is formed by inserting a plurality of notches extending in a width direction at intervals in a longitudinal direction of an elongated plate member made of a thermoplastic resin. Is formed in a substantially U-shape by being bent at two places in the width direction along the longitudinal direction.

According to a fourth aspect of the present invention, there is provided an opening trim having a substantially U-shaped cross section and a trim portion made of a thermoplastic elastomer and attached to an opening edge of a vehicle, and a core material made of a thermoplastic resin embedded in the trim portion. And the core material is
It comprises a plurality of substantially U-shaped components arranged side by side at intervals in the longitudinal direction of the opening trim, and these components are separated without being connected to each other.

According to the opening trim according to the present invention, a thermoplastic elastomer is used as a material of a trim portion and a thermoplastic resin is used as a material of a core material embedded in the trim portion. It is easy to recycle, does not rust, and has a low product weight. Further, production costs can be reduced. In claim 4, since the plurality of substantially U-shaped components constituting the core are separated without being connected to each other, the core has a shape that can follow the bent shape, Therefore, the opening trim described in claim 4 can follow the bent shape of the corner at the opening edge of the vehicle.

In the present invention, the opening trim includes an opening weather strip having the trim portion and a hollow or lip-shaped seal portion bulging from the trim portion.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective sectional view of the opening trim 10 according to the first embodiment in a state where the opening trim 10 is mounted on a vehicle, and FIG. 2 is a perspective view of a core member 12 embedded in the opening trim 10.

As shown in FIG. 1, the opening trim 10 is constituted by a trim portion 14 having a substantially U-shaped cross section which is fitted to the flange 2 of the opening edge 1 of the vehicle. Are formed with a plurality of holding lips 16 for holding the flange 2. Also, the trim section 14
Is embedded with a core material 12 for reinforcement.
Numeral 2 is arranged in substantially the entire area along the U-shape of the trim portion 14, and is bent in a substantially U-shape similar to the trim portion 14.

Here, the trim portion 14 is formed of a thermoplastic elastomer, and the core 12 is formed of a thermoplastic resin such as polypropylene, polyethylene, or polyvinyl chloride. The thermoplastic elastomer generally comprises a resin component which is a hard segment and a rubber component which is a soft segment, and includes polyolefin, polyester, polyurethane and the like. It is desirable to use the same type of thermoplastic resin as the above. Thereby, when the used opening trim 10 is pulverized, it can be reused as a thermoplastic elastomer. For example,
When using an olefin-based thermoplastic elastomer (TPO) for the trim portion 14, it is preferable to use a polyolefin such as polypropylene or polyethylene for the core material 12.

As shown in FIG. 2, the core member 12 is composed of a plurality of substantially U-shaped component pieces 18 arranged side by side at predetermined intervals in the longitudinal direction of the opening trim 10, and these component pieces 18
Are connected to each other, and the adjacent component pieces 18 are connected only in a part of the U-shape by the connecting portion 20. That is, the component piece 18 is composed of the U-shaped bottom portion and a pair of opposing side portions extending from the bottom portion. In the component pieces 18 adjacent to each other, only one of them is connected. It is not connected at two places. Thus, the core member 12 is configured to be able to follow the bent shape of the corner portion C at the opening edge portion 1 of the vehicle shown in FIGS. 1 and 15.

More specifically, in this embodiment, the core 12
The two end portions of a plurality of substantially U-shaped component pieces 18 in which a component piece 18 and a connecting portion 20 are formed by a bent shape of one wire member and are arranged in parallel in the longitudinal direction of the opening trim 10. Are alternately connected by a connecting portion 20 extending in the longitudinal direction of the opening trim 10.

FIG. 3 is a view showing an example of a method of manufacturing the opening trim 10 of the present embodiment.

As shown in FIG. 3 (a), a thermoplastic resin is discharged from an injection machine 52 onto a rotating belt conveyor 50 to draw a meandering pattern.
A wire member 12a made of a thermoplastic resin and extending in a meandering manner as shown in FIG.
To form Specifically, the wire member 12a has a shape in which both end portions of wire members arranged parallel to each other at a certain interval in the longitudinal direction are alternately connected by wire members extending in the longitudinal direction.

Then, while heating the meandering wire member 12a, two folding curves m1 and m2 shown in FIG.
To form a U-shaped core material 12 shown in FIG. Then, as shown in FIG. 3D, the U-shaped core 12 is extruded by using an extruder 54 so as to be wrapped with a thermoplastic elastomer, whereby the opening trim 10 is obtained.

FIG. 4 is a view showing another example of a method of manufacturing the opening trim 10 of the present embodiment.

In this method, as shown in FIG.
First, the extruder 54 extrudes a flat plate 14a constituting the outer portion of the trim portion 14 with a thermoplastic elastomer. Next, as shown in FIG. 4B, a line member 12a extending in a meandering manner is formed on the flat plate 14a by discharging a thermoplastic resin from the injection machine 52 and drawing a meandering pattern. Then, as shown in FIG. 4 (c), this is bent into a U-shape while being heated, and further, as shown in FIG. 4 (d), the inside of this U-shaped member is extruded using an extruder 54. The opening trim 10 having a three-layer structure is obtained by extruding the thermoplastic elastomer layer 14b so as to overlap each other.
In FIG. 4D, the thermoplastic elastomer layer is extruded on the outside of the U-shaped member so as to overlap the layer.
An opening trim having a layer structure may be used.

According to the opening trim 10 of the present embodiment as described above, a thermoplastic elastomer is used as a material of the trim portion 14 and a thermoplastic resin is used as a material of the core material 12 embedded in the trim portion 14. Therefore, it is easy to recycle, no rust is generated, and the product weight is light. Further, the production cost can be reduced because the recycling is easy and the product terminal does not need rust prevention treatment.

Further, the core member 12 is formed in a shape in which a plurality of substantially U-shaped component pieces 18 are alternately connected at the terminal portion thereof, and the adjacent component pieces 18 are connected at a plurality of U-shaped portions. Since it has not been done, opening trim 1
0 is attached to the opening edge 1 of the vehicle, the corner C
And can be mounted without any trouble by following the bent shape of the cable.

FIG. 5 shows the structure of the core member 12 for coping with a change in the thickness of the flange 2 to which the trim portion 14 is fitted, when the thickness changes. The core member 12 is set to have a higher rigidity in a portion attached to an area having a smaller thickness in order to cope with a change in the thickness of the flange 2.

In the example shown in FIG. 5A, the meandering pitch of the meandering line member 12a is changed in the longitudinal direction of the opening trim 10. in this case,
A portion A formed with a narrow meandering pitch Pa corresponds to a region having a small plate thickness, and a portion B having a wide meandering pitch Pb corresponds to a region having a large plate thickness. That is, a portion A having a small meandering pitch Pa is attached to a region where the plate thickness of the flange 2 is small, and a portion B having a large meandering pitch Pb is attached to a region where the plate thickness of the flange 2 is large.
The opening trim 10 can be mounted without trouble even when the thickness of the flange 2 is changed.

In the example shown in FIG. 5B, the discharge amount of the thermoplastic resin by the injection machine 52 is changed so that the thickness of the core material 12 is reduced.
That is, the thickness of the wire member 12 a is changed in the longitudinal direction of the opening trim 10. In this case, the thick portion A of the core 12 corresponds to a region where the thickness of the flange 2 is small, and the thin portion B of the core 12 corresponds to a region where the thickness of the flange 2 is large.

FIG. 6 is a perspective view of a core member 22 used for an opening trim according to a second embodiment of the present invention. In this embodiment, as in the first embodiment, the core member 22 includes a plurality of component pieces 18 having a substantially U-shape and a connecting portion 20 that connects the component pieces 18 only at a part of the U-shape. Thereby, it is configured to be able to follow the bent shape of the corner portion C at the opening edge portion 1 of the vehicle. Except for the shape of the core material such as the material of the trim portion and the core material and the shape of the trim portion, the description is omitted because it is the same as that of the first embodiment.

In the second embodiment, the core member 22 is composed of a plurality of substantially U-shaped strip-shaped components 18 arranged side by side at predetermined intervals in the longitudinal direction of the opening trim.
Are connected by a connecting portion 20 extending in the longitudinal direction on one side of the U-shape.

FIG. 7 shows an example of a method of manufacturing the opening trim 10 according to the second embodiment. As shown in FIG. The plate member 22a is extruded. Next, FIG.
As shown in (b), a plurality of notches 24 extending in the width direction are provided in the plate member 22a at regular intervals in the longitudinal direction, so that the plurality of strip-shaped component pieces 18 extend in the longitudinal direction. A member 22b connected by the connecting portion 20 is formed. Here, the notch 24 is formed from both ends in the width direction of the plate member 22a, and the notch length from one end is set longer than the notch length from the other end.

The member 22b having the notch 24
While heating the two fold curves m1 and m1 shown in FIG.
By bending at m2, a U-shaped core material 22 shown in FIG. 7C is formed. Then, as shown in FIG.
The opening trim 10 is obtained by extruding this U-shaped core material 22 so as to be wrapped with a thermoplastic elastomer.

FIG. 8 shows a core member 22 according to the second embodiment.
This is another example, and the figure shows a state of a member 22b having a notch 24 before being bent into a U-shape.

In the example shown in FIG. 8 (a), the notch 24 is formed only from one end of the plate member 22a in the width direction. It is formed in a connected shape at one terminal.

In the example shown in FIG. 8B, the cutouts 24 are formed at the same cutout length from both ends in the width direction of the plate member 22a. The pieces 18 are formed in a shape connected at the bottom of the U-shape.

In the example shown in FIG. 8C, the cutouts 24 are alternately inserted from both ends in the width direction of the plate member 22a.
8 are formed in a staggered shape at both ends of the U-shape.

FIG. 9 shows a structure of the core member 22 for accommodating a change in the thickness of the flange 2 to which the trim portion 14 is fitted in the second embodiment when the thickness of the flange 2 changes. ing. In order to cope with a change in the thickness of the flange 2, the core material 22 is attached to a region having a smaller thickness,
The rigidity is set to be high.

In the example shown in FIG. 9A, the width of the component 18 is changed in the longitudinal direction of the opening trim 10 by changing the width of the notch 24. In this case, a portion A of the component piece 18 having a wide width wa corresponds to a region where the thickness of the flange 2 is small, and a portion B having a small width wb corresponds to a region where the thickness of the flange 2 is large.

In the example shown in FIGS. 9B and 9C, the rigidity of the component piece 18 is changed in the longitudinal direction of the opening trim 10 by changing the shape of the notch 24. In the example shown in FIG. 9B, a notch 26 is provided at the base of the component piece 18 in the portion B corresponding to the thick region of the flange 2 to reduce the rigidity of the component piece 18 in this portion B. I have. In the example shown in FIG. 9C, a small hole 28 is formed at the base of the component piece 18 in a portion B corresponding to a region where the thickness of the flange 2 is large, and the rigidity of the component piece 18 in this portion B is reduced. Lower.

FIG. 10 is a perspective view of a core material 32 used for an opening trim according to a third embodiment of the present invention. Except for the shape of the core material such as the material of the trim portion and the core material and the shape of the trim portion, the description is omitted because it is the same as that of the first embodiment.

In this embodiment, the core member 32 is composed of a plurality of substantially U-shaped components 18 arranged side by side at intervals in the longitudinal direction of the opening trim 10.
Are separated from each other without being connected to each other, so that they can follow the bent shape of the corner portion C at the opening edge portion 1 of the vehicle.

More specifically, the component piece 18 has a shape obtained by bending a strip-shaped thermoplastic resin piece into a U-shape.
Are arranged at regular intervals.

FIG. 11 shows an example of a method of manufacturing the opening trim 10 according to the third embodiment.
As shown in FIG. 11A, first, a member 14c having a U-shaped cross section, which constitutes an outer portion of the trim portion 14, is extruded from a extruder 54 with a thermoplastic elastomer. Next, FIG.
As shown in (b) and (c), a U-shaped component piece 18 made of a thermoplastic resin is fitted inside the member 14c at regular intervals in the longitudinal direction. Then, FIG.
As shown in FIG. 3, the extruder 54 is used to extrude the thermoplastic elastomer layer 14d so as to overlap the inside of the U-shaped member 14c in which the component piece 18 is fitted, so that 3
An opening trim 10 having a layer structure is obtained.

Also in the third embodiment, in order to cope with a change in the thickness of the flange 2, the rigidity of the core material 32 may be set so that the rigidity of the core material 32 increases as the portion is attached to a thinner region.

For example, in FIG.
When the component pieces 18 are fitted in the opening trim 10, the arrangement intervals of the component pieces 18 are changed in the longitudinal direction of the opening trim 10 to cope with this change in the plate thickness. That is, the arrangement interval of the component pieces 18 is reduced at the portion where the flange 2 is attached to the thin plate region, and the arrangement interval of the component pieces 18 is increased at the portion where the flange 2 is attached to the thick plate region. Accordingly, it is possible to cope with a change in the thickness of the flange 2.

Further, in order to cope with such a change in the plate thickness of the flange 2, it is possible to use components 18 having different rigidities in combination.

For example, the hardness of the thermoplastic resin itself, which is the material of the component piece 18, may be changed. In this case, the component piece 18 made of the thermoplastic resin having a high hardness corresponds to the region of the flange 2 where the plate thickness is small. The component piece 18 made of a thermoplastic resin having a low hardness corresponds to a region of the flange 2 where the plate thickness is large.

Further, as shown in FIG. 12, the rigidity can be changed by changing the cross-sectional shape of the component piece 18. In this case, the bold constituent piece 18a shown in FIG.
Are the other component pieces 18b to 18f shown in FIGS.
The rigidity of the flange 2 is high, and corresponds to the region where the thickness of the flange 2 is small. That is, the component piece 18b shown in FIG. 12 (b) has a reduced rigidity by reducing the thickness in the cross-sectional shape with respect to the component piece 18a. are doing.
Further, in the configuration piece 18c shown in FIG. 12C, both corners of the U-shape are chamfered 34, and
In each of the component pieces 18d to 18f shown in (d) to (f), the notches 36 are formed at both corners of the U-shape, so that the component pieces 18
The rigidity is smaller than a, which corresponds to the region where the thickness of the flange 2 is large.

Also, as shown in FIG. 13, the rigidity can be changed by changing the thickness of the component piece 18 (the thickness in the longitudinal direction of the opening trim 10). In this case, the rigidity shown in FIG. The component piece 18g corresponds to an area where the thickness of the flange 2 is large, and the thick component piece 18h shown in FIG. 13B corresponds to an area where the thickness of the flange 2 is small.

In each of the embodiments described above, the opening trim 10 including the trim portion 14 fitted to the flange 2 of the opening edge 1 of the vehicle has been described. The hollow sealing portion 42
The present invention can be similarly applied to the opening weather strip 40 which is an opening trim provided with:
It is preferable to use a thermoplastic elastomer as the material of the seal portion 42. The seal portion 42 comes into contact with the edge of the door 3 (see FIG. 15) that opens and closes the opening of the vehicle. With this contact, the space between the opening of the vehicle and the door is sealed. As described above, since the seal portion 42 elastically deforms and seals by contact with the door edge,
More preferably, it is formed of a foamed extrudate of a thermoplastic elastomer. Note that the seal portion 42 may have a lip shape.

[0052]

According to the opening trim of the present invention,
Since the trim portion is made of a thermoplastic elastomer and the core material is made of a thermoplastic resin, recycling is easy, no rust is generated, and the product weight is light. Further, production costs can be reduced. Since the core material has a shape that can follow the bent shape, it can follow the bent shape of the corner at the opening edge of the vehicle.

[Brief description of the drawings]

FIG. 1 is a perspective sectional view of an opening trim according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a core material embedded in the opening trim.

FIGS. 3A to 3D are views showing an example of a manufacturing process of the opening trim.

FIGS. 4A to 4D are diagrams showing another example of the manufacturing process of the opening trim.

FIGS. 5A and 5B are plan views showing modified examples of the core material in the embodiment.

FIG. 6 is a perspective view of a core material according to a second embodiment of the present invention.

FIGS. 7A to 7D are views showing an example of a manufacturing process of the opening trim of the embodiment.

FIGS. 8A to 8C are plan views showing modified examples of the core material in the embodiment.

FIGS. 9A to 9C are plan views showing modified examples of the core material in the embodiment.

FIG. 10 is a perspective view of a core material according to a third embodiment of the present invention.

FIGS. 11A to 11D are views showing an example of a manufacturing process of the opening trim of the embodiment.

FIGS. 12A to 12F are cross-sectional views showing modified examples of the core material in the embodiment.

FIGS. 13A and 13B are perspective views showing a modified example of the core material in the embodiment.

FIG. 14 is a sectional view of an opening trim including a hollow seal portion according to an embodiment of the present invention.

FIG. 15 is a perspective view showing a trunk portion of an automobile.

FIG. 16 is a sectional view of a conventional opening trim.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 opening trim 12, 22, 32 core material 12a meandering wire member 14 trim portion 18 component piece 20 connecting portion 22a thermoplastic resin plate member 22b notched member 24 notch

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B29L 31:30 F term (Reference) 3D023 BA01 BB00 BC01 BD02 BD18 BE03 BE04 BE10 BE31 BE37 3D024 AA02 AA17 AB08 AB18 AB33 AB41 AB57 AC09 4F207 AA45 AD05 AD18 AD23 AG03 AH23 KA01 KA17 KB18 KB22 KJ05

Claims (4)

[Claims] 1. A core having a substantially U-shaped cross section and made of a thermoplastic elastomer attached to an opening edge of a vehicle, and a core made of a thermoplastic resin embedded in the trim. Is composed of a plurality of substantially U-shaped components arranged side by side at intervals in the longitudinal direction of the opening trim, and a connecting portion for connecting these components.
An opening trim characterized by being connected only in a part of the character. 2. The core material is formed in a substantially U-shape by bending a meandering line member made of a thermoplastic resin at two places in the width direction along the longitudinal direction. The opening trim according to claim 1, wherein: 3. The core material has a plurality of notches extending in the width direction at intervals in the length direction of the elongated plate member made of a thermoplastic resin, and the cutouts are formed at two positions in the width direction in the length direction. The opening trim according to claim 1, wherein the opening trim is formed in a substantially U-shape by being bent along. 4. A trim having a substantially U-shaped cross section and comprising a trim portion made of a thermoplastic elastomer and attached to an opening edge of a vehicle, and a core material made of a thermoplastic resin embedded in the trim portion. Comprises a plurality of substantially U-shaped components arranged side by side at intervals in the longitudinal direction of the opening trim, and the components are separated without being connected to each other. .