JP2013112169A - Roof molding for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent sink marks in injection molding of a terminal part and to stably mount a clip to a leg in a roof molding in which the terminal part is bonded to a terminal of a roof molding body on which extrusion molding has been performed, through injection molding and the clip is mounted to the leg of the terminal part.SOLUTION: An insert member 28 which is formed beforehand separately from a terminal part 16 is embedded in a leg 26 of the terminal part 16, thereby making an injection molding portion of the leg 26 be thin. Thus, a thickness difference in portions of the terminal part 16 can be reduced and sink marks can be prevented from being generated on a car outside surface of a head 25 when injection molding is performed on the terminal part 16. Further, since the insert member 28 is buried in the leg 26 of the terminal part 16, even if the injection molding portion of the leg 26 is made thin, rigidity of the overall leg 26 can be secured. Thus, a clip 17 is mounted stably to the leg 26 and the clip 17 can be prevented from being removed.

Description

  The present invention relates to a vehicle roof molding that is mounted in a roof groove formed along a joint portion between a vehicle roof panel and a roof side panel.

  As a roof molding to be mounted in a roof groove of a vehicle, for example, as described in Patent Document 1 (Japanese Patent Laid-Open No. 2009-154555), an injection molding is performed on a terminal of a roof molding main body formed by extrusion molding. When the roof molding was installed in the roof groove, the roof molding was fixed to the roof groove by fitting the terminal part of the roof molding to the clip fixed to the roof groove. There is something.

JP 2009-154555 A

  By the way, the present applicant forms, on the terminal of the roof molding, a terminal part having a head part covering the roof groove and a leg part protruding from the back surface of the head part toward the inside of the vehicle by injection molding of a polymer material, We have been researching a roof molding with clips attached to the legs of this terminal, but the following problems were found.

  If the thickness of the leg is increased so that the clip can be attached stably by securing the rigidity of the leg of the terminal, the amount of shrinkage of the polymer material on the surface of the head when the terminal is injection molded There is a risk of sink marks due to the difference.

  On the other hand, if the thickness of the leg portion is reduced in order to prevent the occurrence of sink marks on the head surface when the terminal portion is injection-molded, the leg portion is easily deformed and the clip is easily detached. May not be stably fixed to the roof groove.

  Therefore, the problem to be solved by the present invention is for a vehicle that can prevent sink marks when the terminal portion is injection-molded and can stably attach the clip to the leg portion of the terminal portion. To provide a roof molding.

  In order to solve the above problems, the invention according to claim 1 is a clip that can be attached to a roof groove formed along a joint portion between a roof panel and a roof side panel of a vehicle and is fixed to the roof groove. A roof molding for a long vehicle to which is attached, and at least one terminal of the roof molding is attached with a head that covers the roof groove and a clip that protrudes from the back surface of the head toward the inside of the vehicle A terminal portion having a leg portion is formed by injection molding of a polymer material, and at least the leg portion of the terminal portion is configured such that a core material previously formed separately from the terminal portion is embedded by injection molding. Is.

  In this configuration, since the core material is embedded in the leg part of the terminal part, the injection molding part of the leg part can be made thin, thereby reducing the difference in wall thickness of each part of the terminal part, When the terminal portion is injection-molded, it is possible to prevent sink marks from occurring on the outer surface of the head of the vehicle. Moreover, since the core is embedded in the leg part of the terminal part, the rigidity of the entire leg part can be secured even if the injection molding part of the leg part is made thin, thereby stabilizing the clip on the leg part. Thus, the clip can be prevented from coming off and the roof molding can be stably fixed to the roof groove.

  In this case, as in claim 2, the core material has a constant distance from the vehicle outer surface of the core material to the vehicle outer surface of the head (that is, the vehicle outer surface of the core and the vehicle outer surface of the head are parallel to each other). It is good to bury it so that it may become. In this way, in the region where the core material is embedded, there is no partial sink on the vehicle exterior surface of the head, and the appearance is not impaired.

  Further, as in claim 3, the thickness of the polymer material covering the outer surface of the core material is preferably 0.5 mm or more and 3 mm or less. If the thickness of the polymer material covering the outer surface of the core material is thinner than 0.5 mm, it is difficult to form the terminal portion. On the other hand, if the thickness of the polymer material covering the outer surface of the core material is thicker than 3 mm, sink marks may occur. Therefore, if the thickness of the polymer material covering the outer surface of the core material is set to 0.5 mm or more and 3 mm or less, the core material is prevented from sinking while securing the moldability of the terminal portion. It is possible to prevent the occurrence of a step due to sink marks between the embedded portion and the portion where the core material is not embedded.

  Further, as in claim 4, the core material is preferably formed of the same polymer material as that of the terminal portion. If it does in this way, a core material and a terminal part can be welded well and can be integrated, and while fixing strength of a core material and a terminal part can be improved, a core material will separate from a terminal part. Can be prevented.

  Furthermore, as in claim 5, the core material is preferably embedded so as to be located in the center in the width direction of the leg portion. If it does in this way, an injection-molded part can be left substantially equal on the both sides of the width direction of a leg part, and it can make it easy to injection-mold a leg part.

  According to another aspect of the present invention, a through hole may be formed in the core material, and a polymer material that forms a terminal portion may be filled in the through hole. If it does in this way, even if the core material and the terminal part are not welded, it can prevent that a core material remove | deviates from a terminal part.

  Further, as described in claim 7, the roof molding is joined to the end of the extrusion-molded roof molding main body by a terminal portion being injection-molded and joined to the tip of the end of the roof molding main body and the core material. It is preferable that the protruding portion overlaps with the longitudinal direction of the roof molding. In this way, the strength when the terminal portion is bent can be ensured.

  Moreover, you may make it form in the core material the protrusion part which protrudes toward the width direction outer side of this core material. If it does in this way, when carrying out injection molding of a terminal part, a core material can be positioned with a projection part of a core material.

  In this case, the protrusions may be formed on both sides of the core material. However, as described in claim 9, the protrusions may be formed only on one side of the core material. In this way, it is possible to easily determine the left and right of the core material.

FIG. 1 is a perspective view of a main part of an automobile equipped with a roof molding in one embodiment of the present invention. FIG. 2 is a longitudinal sectional view of the front end of the roof molding and the periphery thereof. 3 is a cross-sectional view taken along the line AA in FIG. FIG. 4 is a perspective view of the insert member. 5 is a cross-sectional view taken along line BB in FIG. 6 is a cross-sectional view taken along the line CC of FIG. 7 is a cross-sectional view taken along the line DD of FIG. 8 is a cross-sectional view taken along line EE in FIG.

Hereinafter, an embodiment embodying a mode for carrying out the present invention will be described.
As shown in FIG. 1, roof side panels 12 are joined to both left and right sides of a roof panel 11 of an automobile by spot welding or the like, and concave along the joints between these roof panels 11 and roof side panels 12. The roof groove 13 (see FIGS. 2 and 3) is formed so as to extend in the longitudinal direction of the vehicle. A long roof molding 14 is mounted along the roof groove 13, and the roof molding 14 covers the joint between the roof panel 11 and the roof side panel 12.

Next, the configuration and the like of the roof molding 14 will be described with reference to FIGS.
As shown in FIG. 2, the roof molding 14 is formed by cutting the front end of the extruded roof molding main body 15 into a predetermined shape with a press or the like, and then connecting the terminal portion to the front terminal of the roof molding main body 15. 16 is injection-molded and joined. A metal clip 17 is attached to the terminal portion 16, and when the roof molding 14 is attached to the roof groove 13, the clip is attached to the metal stud pin 18 fixed to the bottom wall portion 13 a of the roof groove 13. By engaging 17, the roof molding 14 is fixed to the roof groove 13.

  As shown in FIG. 3, the roof molding body 15 includes a head 19 that covers the roof groove 13 by extrusion molding of an elastic polymer material such as a thermoplastic resin (including a thermoplastic elastomer) or rubber, and the head 19. A decorative portion 20 that covers the vehicle outer surface, an upper leg 21 that extends downward from the back surface of the head 19, a lower leg 22 that supports the upper leg 21 from below, and a lower leg 22 Lip portions 23 extending laterally from both sides in the width direction are integrally formed, and a core wire 24 formed of a material having a low linear expansion coefficient such as a metal plate or a metal wire is combined inside the upper leg portion 21. It is buried by extrusion molding.

  When the roof molding 14 is mounted on the roof groove 13, the lip portion 23 of the roof molding main body 15 is elastically contacted with the side wall portion 13 b of the roof groove 13 so that the roof molding 14 is held in the roof groove 13. It has become. Further, the upper leg portion 21 is formed of a hard material so that the entire roof molding 14 is given a predetermined rigidity. Furthermore, the core wire 24 is embedded in the upper leg portion 21 to suppress the expansion and contraction of the roof molding 14 due to temperature changes.

  In the present embodiment, for example, TPO (olefinic thermoplastic elastomer) is used as an elastic polymer material for molding the roof molding body 15. In this case, the decorative part 20 is formed of a material having good durometer hardness according to JISK7215 with HDD 50-60 and good weather resistance and scratch resistance, and the head 19 is made of a material having durometer hardness according to JISK7215 having elasticity of HDA 70-80. Is formed.

  Further, the upper leg 21 is made of a material (hard material) having a durometer hardness according to JIS K7215 of HDA 85 to 95 and harder than the head 19, and the lower leg 22 has a durometer hardness of HDA 70 to 80 according to JIS K7215. The lip portion 23 is made of the same material (soft material). The lower leg 22 may be formed of the same material (hard material) as the upper leg 21.

  The lip portion 23 is made of a material having a durometer hardness of HDA 70-80 according to JIS K7215 and having elasticity so that it does not generate an unpleasant sound when it hits the side wall portion 13b of the roof groove 13. I have to.

  The elastic polymer material for molding the roof molding main body 15 (the head 19, the decorative portion 20, the upper leg 21, the lower leg 22, and the lip 23) is not limited to TPO, and may be changed as appropriate. For example, a thermoplastic resin such as PVC resin (polyvinyl chloride resin) or rubber such as EPDM (ethylene-propylene-diene rubber) may be used.

  On the other hand, as shown in FIG. 5, the terminal portion 16 includes a head 25 that covers the roof groove 13 by injection molding of an elastic polymer material such as a thermoplastic resin (including a thermoplastic elastomer) or rubber, and the head 25. A leg portion 26 that protrudes from the back surface toward the vehicle inner side (downward) and a shielding portion 27 (see FIG. 2) that covers the front end surface of the terminal portion 16 are integrally formed. Inside the terminal portion 16, an insert member 28 (core material) formed in advance is embedded by injection molding. The lower end of the leg portion 26 is provided with a fixing portion 29 protruding laterally from both sides in the width direction. After the terminal portion 16 is injection-molded, the locking claw 17a of the clip 17 is bent so as to sandwich the fixing portion 29. The clip 17 is attached to the lower end of the leg portion 26 by processing (caulking).

  In this embodiment, for example, TPO is used as the elastic polymer material for molding the terminal portion 16. In this case, the head portion 25 and the leg portion 26 are formed of a material that can be injection-molded and has a durometer hardness according to JIS K7215 of HDA 85 to 95. As described above, the leg portion 26 is formed of a hard material (hard material) of HDA 85 to 95, so that the leg portion 26 is provided with rigidity capable of attaching the clip 17.

  The insert member 28 is formed of the same polymer material (TPO in this embodiment) as the polymer material forming the terminal portion 16 (head portion 25 and leg portion 26) or a similar polymer material. Thereby, the injection molding part of the insert member 28 and the terminal part 16 (head 25 and leg part 26) can be favorably welded and integrated, and the fixing strength between the insert member 28 and the terminal part 16 is improved. It is possible to prevent the insert member 28 from being detached from the terminal portion 16. Furthermore, when the terminal portion 16 is deformed, the insert member 28 can be deformed following the injection molding portion of the terminal portion 16.

  In addition, the elastic polymer material which shape | molds the terminal part 16 (head 25 and leg part 26) and the insert member 28 is not limited to TPO, You may change suitably, For example, thermoplastic resins, such as PVC resin, or A rubber such as EPDM may be used.

  As shown in FIG. 4, the insert member 28 is formed in a substantially flat plate shape by injection molding in advance separately from the terminal portion 16, and the vehicle outer surface 28 a that is an upper side when embedded in the terminal portion 16 has a longitudinal direction and a width. In the direction, it has a curved surface shape that matches the shape of the vehicle outer surface 25 a of the head portion 25 of the terminal portion 16. The vehicle outer surface 28a may have a curved surface shape that matches the shape of the vehicle outer surface 25a of the head 25 in either the longitudinal direction or the width direction.

  The insert member 28 has a protrusion 30 that protrudes outward in the width direction of the insert member 28 only on one side of the insert member 28. Thereby, the right and left of the insert member 28 can be easily discriminated, and when the insert member 28 is set in the injection mold of the terminal portion 16 and the terminal portion 16 is injection-molded, the protruding portion of the insert member 28 The insert member 28 can be positioned at 30.

  In addition, semi-circular support portions 31 are formed at a plurality of positions on the lower end portion (end portion on the vehicle interior side) of the insert member 28, and are joined to one end portion (the roof molding main body portion 15) of the insert member 28. A projecting portion 32 is formed on the side end portion. Thereby, when the insert member 28 is set in the injection mold of the terminal portion 16 and the terminal portion 16 is injection-molded, the insert member 28 can be supported by the support portion 31 and the end of the roof molding main body portion 15. Of the insert member 28 and the projecting portion 32 of the insert member 28 overlap each other in the direction (vertical direction) intersecting the longitudinal direction of the roof molding 14 (see FIG. 2). And since the support part 31 is formed in semicircle shape, a contact area with an injection mold becomes small, and it can make it difficult to prevent the flow of the polymer material which forms the terminal part 16. FIG. Further, through holes 33 filled with a polymer material forming the terminal portion 16 are formed at a plurality of locations of the insert member 28.

  2 and 5, the insert member 28 has a constant distance from the vehicle outer surface 28a of the insert member 28 to the vehicle outer surface 25a of the head 25 (that is, the vehicle outer surface 28a of the insert member 28 and the head). 25 of the vehicle outer surface 25a are embedded in the front-rear direction and the vehicle width direction). Thereby, in the area | region where the insert member 28 is embed | buried, it is prevented that a sink mark arises partially in the vehicle outer surface 25a of the head 25, and it does not impair the external appearance.

  Furthermore, as shown in FIG. 5, the thickness t of the polymer material covering the vehicle outer surface 28a of the insert member 28 is set to be 0.5 mm or more and 3 mm or less. When the thickness t of the polymer material covering the vehicle outer surface 28a of the insert member 28 is thinner than 0.5 mm, it is difficult to mold the terminal portion 16 (for example, the head portion 25). On the other hand, if the thickness t of the polymer material covering the vehicle outer surface 28a of the insert member 28 is thicker than 3 mm, the vehicle outer surface 25a of the head 25 may be sinked. Therefore, if the thickness t of the polymer material covering the vehicle outer surface 28a of the insert member 28 is 0.5 mm or more and 3 mm or less, the occurrence of sink marks can be prevented while securing the formability of the terminal portion 16. Further, it is possible to prevent a step due to sink marks between a portion where the insert member 28 is embedded and a portion where the insert member 28 is not embedded.

  The position of the outer surface 28a of the insert member 28 (that is, the thickness t of the polymer material covering the outer surface 28a of the insert member 28) is determined by the material and shape of the terminal portion 16, or the molding temperature and molding. Although it may be appropriately changed depending on molding conditions such as pressure at the time, it is preferably set within a range that can prevent sink marks due to injection molding and prevent the occurrence of weld lines and short shots (insufficient material filling).

  As shown in FIG. 5, the insert member 28 is embedded so as to be located at the center of the leg portion 26 in the width direction. As a result, the injection-molded portions can be left substantially evenly on both sides of the leg portion 26 in the width direction, so that the leg portion 26 can be easily injection-molded.

  Further, as shown in FIG. 6, the through hole 33 formed in the insert member 28 is filled with a polymer material forming the terminal portion 16 and solidified. Thereby, the insert member 28 and the injection-molded portion of the terminal portion 16 can be mechanically joined, and even if the insert member 28 and the injection-molded portion of the terminal portion 16 are not welded, the insert member 28 can be inserted from the terminal portion 16. The member 28 can be prevented from coming off.

  As shown in FIGS. 2 and 8, the roof molding 14 includes a tip of the end of the roof molding main body 15 and a protrusion 32 of the insert member 28 at the joint between the roof molding main body 15 and the terminal 16. Is overlapped in the direction (vertical direction) intersecting the longitudinal direction of the roof molding 14, the bonding strength between the roof molding main body 15 and the terminal portion 16 can be improved, and the strength when the terminal portion 16 is bent. Can be secured.

  As shown in FIG. 7, an engagement hole 17 b is formed in the clip 17 attached to the leg portion 26 of the terminal portion 16, and when the roof molding 14 is attached to the roof groove 13, The roof molding 14 is fixed to the roof groove 13 by engaging the engagement hole 17b of the clip 17 with the stud pin 18 fixed to the bottom wall portion 13a.

  In the present embodiment described above, the end 16 is injection-molded and joined to the end of the extruded roof molding main body 15, and the clip 17 is attached to the leg 26 of the terminal 16. Since the insert member 28 is embedded in the leg portion 26 of the terminal portion 16, the injection-molded portion of the leg portion 26 can be thinned, thereby reducing the difference in thickness of each portion of the terminal portion 16. Therefore, when the terminal portion 16 is injection-molded, it is possible to prevent sink marks from occurring on the outer surface of the head 25 and deformation of the leg portion 26. In addition, since the insert member 28 is embedded in the leg portion 26 of the terminal portion 16, the rigidity of the entire leg portion 26 can be secured even if the injection-molded portion of the leg portion 26 is thinned. The clip 17 can be stably attached to the portion 26 to prevent the clip 17 from coming off, and the roof molding 14 can be stably fixed to the roof groove 13.

  In the above embodiment, the terminal portion is injection-molded and joined to the front end of the roof molding main body. However, the present invention is not limited to this, and the terminal portion is injection-molded to the rear terminal of the roof molding main body. May be joined. Alternatively, the terminal portions may be injection-molded and joined to the terminals (front terminal and rear terminal) on both sides of the roof molding main body.

Moreover, in the said Example, although the projection part was formed only in the one side of an insert member, it is not limited to this, You may make it form a projection part in the both sides of an insert member.
Furthermore, in the said Example, although the through-hole was formed in the insert member, it is not limited to this, You may make it form the non-through-hole which does not penetrate.

  In addition, the present invention can be implemented with various modifications within a range that does not depart from the gist, such as the shape of the roof molding main body part, the terminal part, and the insert member may be appropriately changed.

  DESCRIPTION OF SYMBOLS 11 ... Roof panel, 12 ... Roof side panel, 13 ... Roof groove, 14 ... Roof molding, 15 ... Roof molding main part, 16 ... Terminal part, 17 ... Clip, 18 ... Stud pin, 25 ... Head, 26 ... Leg , 28 ... Insert member (core material), 29 ... Fixed part, 30 ... Projection part, 31 ... Support part, 32 ... Projection part, 33 ... Through-hole

Claims (9)

A roof molding for a long vehicle that can be attached to a roof groove formed along a joint portion between a roof panel and a roof side panel of a vehicle and to which a clip for fixing to the roof groove is attached,
At least one end of the roof molding has a head portion that covers the roof groove and a terminal portion that protrudes from the back surface of the head portion toward the inside of the vehicle and has a leg portion to which the clip is attached. Formed by molding,
A roof molding for a vehicle, wherein a core material previously formed separately from the terminal portion is embedded in at least the leg portion of the terminal portion by the injection molding.   2. The vehicle roof molding according to claim 1, wherein the core material is embedded so that a distance from a vehicle outer surface of the core material to a vehicle outer surface of the head is constant.   The roof molding for a vehicle according to claim 2, wherein the thickness of the polymer material covering the outer surface of the core material is 0.5 mm or more and 3 mm or less.   The roof molding for a vehicle according to any one of claims 1 to 3, wherein the core material is formed of the same polymer material as that of the polymer material forming the terminal portion.   The roof molding for a vehicle according to any one of claims 1 to 4, wherein the core material is embedded so as to be positioned at a center in a width direction of the leg portion.   The vehicle roof molding according to any one of claims 1 to 5, wherein a through hole is formed in the core material, and the through hole is filled with a polymer material that forms the terminal portion.   In the roof molding, the terminal portion is injection-molded and joined to the end of the extruded roof molding main body portion, and the tip of the terminal of the roof molding main body portion and the protruding portion of the core member are joined at the joint portion. The roof molding for a vehicle according to any one of claims 1 to 6, wherein the roof molding overlaps in a direction intersecting with a longitudinal direction of the roof molding.   The roof molding for a vehicle according to any one of claims 1 to 7, wherein the core member is formed with a protrusion that protrudes outward in the width direction of the core member.   The vehicle roof molding according to claim 8, wherein the protrusion is formed only on one side of the core member.

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