JP2011093367A - Molding mounting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate a need of a slide core when molding a molding body, and prevent a sink of a design surface while showing high mounting strength. <P>SOLUTION: A pair of molding engaging parts 21a, 21b are formed on both sides nipping an outer plate engaging part 20 of a clip 2, respectively, and directions for engaging a pair of through holes 13 formed on an engaging rib 11 of the molding body 1 with a pair of the molding engaging parts 21a, 21b are opposed to each other. Failures such that the clip 2 is mounted to the molding body 1 in a twisted manner can be prevented in advance, so as to improve accuracy for mounting a vehicle outer plate 3 to the molding body 1. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a mounting structure for a molding such as a side molding of an automobile.

  A side molding is attached to the side surface of the outer plate of the automobile in order to prevent the outer plate from being damaged or to improve the design. This side molding has a long plate shape, is manufactured by extrusion molding or injection molding from a thermoplastic resin, and is attached to a through hole formed in the vehicle outer plate via a clip.

  For example, in the conventional side molding mounting structure disclosed in Japanese Patent Application Laid-Open No. 2002-172661, an engaging claw integrated with the molding main body is formed on the back side of the molding main body, and the engaging claw is used as a latching claw of the clip. Press-fit between the prevention fins and attach the clip to the molding body. Then, the engaging portion of the clip is press-fitted toward the through-hole of the vehicle outer plate, and the base of the engaging portion that has come out of the through-hole is engaged with the peripheral portion of the through-hole, so that the molding main body is connected to the vehicle via the clip. It is installed on the skin.

  However, in the mounting structure described above, a slide core is required to integrally form the engaging claws when molding the molding body, and the sliding core may slide along the back surface of the molding body. In such a case, resin powder is generated when the molding body is scraped by the slide core, and the resin powder adheres to the molding body, resulting in poor quality. For example, when coating or plating is performed on the surface of the molding body, if the resin powder adheres, the design of the surface is greatly impaired.

  Japanese Patent Application Laid-Open No. 2005-098437 or Japanese Patent Application Laid-Open No. 2008-190644 discloses a mounting structure that eliminates the need for a slide core when molding a molding body. This mounting structure forms a hollow protrusion on the back side of the molding body and forms a plate-like protrusion that protrudes from the protrusion and has an engagement hole. On the other hand, the clip includes a pair of upper and lower clamping parts, an engaging convex part projecting from one of the clamping parts to the other, and a pair of left and right elastically engaging with the through holes of the vehicle outer plate on both sides of the pair of clamping parts. The engaging claw portion is formed. Then, a protrusion protruding from the molding body is inserted between the pair of holding parts, and the clip is held on the molding body by engaging the engaging projection with the engaging hole. By fitting into the through hole of the vehicle outer plate, the molding body is fixed to the vehicle outer plate via a clip.

  According to this mounting structure, since the slide core is not required when molding the molding body, the above-described problems caused by the resin powder can be avoided. Moreover, since the protrusion is hollow, it is possible to prevent sink marks from occurring in the molding body.

Japanese Patent Laid-Open No. 2002-172661 JP 2005-098437 A JP 2008-190644

  However, in a molding where the surface of the design is painted or plated, the sink structure is not easily visible after molding, but the sink is easily noticeable after coating or plating. When it is adopted, even if it is a hollow ridge, the occurrence of sink marks on the design surface is inevitable. In order to prevent such a sink on the design surface, it is required to minimize the volume of the portion protruding from the back surface of the molding body. However, if the thickness of the plate-like protruding portion is reduced, the engagement with the engaging projection protruding from one side of the holding portion toward the other side is reduced, so that the coupling strength with the clip is not sufficient. was there.

  The present invention has been made in view of the above circumstances, and an object to be solved is to eliminate the need for a slide core at the time of molding a molding body and to prevent the design surface from sinking while exhibiting high mounting strength.

A feature of the mounting structure of the molding of the present invention that solves the above-mentioned problem is that the vehicle includes a long molding body having a design surface formed by molding from resin, and a clip mounted on the back side of the molding body, and a vehicle It is a mounting structure of a molding in which the molding body is attached to the vehicle outer panel via the clip by inserting the clip into the mounting hole provided in the outer panel and engaging the mounting hole.
A plate-like engagement rib is integrally formed on the back surface of the molding body, and a pair of holding portions for holding the clip is formed on the engagement rib, and the clip is fitted into the mounting hole. The outer plate engaging portion having a substantially U-shaped cross section having a pair of elastic claws that engage with the peripheral portion of the mounting hole by elastic reaction force, and a pair of molding engaging portions that engage with the pair of holding portions. The pair of molding engaging portions are formed so as to engage with the holding portions on both sides of the outer plate engaging portion.

  The engaging directions of the pair of holding portions and the pair of molding engaging portions are desirably opposite to each other.

  According to the molding mounting structure of the present invention, the pair of molding engaging portions are engaged with the holding portions on both sides of the outer plate engaging portion, respectively. On the other hand, the molding body is fixed to the clip on both sides, and the vehicle outer plate and the molding body are stably fixed. Furthermore, if the engaging directions of the pair of holding portions and the pair of molding engaging portions are opposite to each other, a problem that the clip and the molding main body are attached to be twisted can be prevented in advance. And the mounting accuracy of the molding body is improved.

  Further, since only the engagement rib is formed on the molding body, the occurrence of sink marks is prevented, and even when the molding body has a surface layer formed by painting or plating, a high design property is exhibited. . Furthermore, since the slide core is not required when molding the molding body, it is possible to prevent problems caused by the resin powder.

It is a disassembled perspective view of the mounting structure of the molding concerning one example of the present invention. It is a disassembled perspective view which expands and shows the principal part of FIG. It is a perspective view of the clip used in one Example of this invention. It is a top view of the clip used in one example of the present invention. It is explanatory sectional drawing which shows the attachment method of the attachment structure of the molding | mall which concerns on one Example of this invention. It is sectional drawing of the mounting structure of the molding | mall which concerns on the 2nd Example of this invention. It is a perspective view of the clip used in the 3rd example of the present invention. It is a top view of the clip used in the 3rd example of the present invention.

  The molding mounting structure of the present invention includes a vehicle outer plate, a molding body, and a clip. The vehicle outer plate refers to an outer plate constituting a design surface of a vehicle such as a fender panel, a door panel, a hood panel, or a roof panel. A mounting hole for mounting the molding is formed in the vehicle outer plate. The shape of the mounting hole is not particularly limited, such as a round shape or a square shape.

  The molding body is a long one formed by molding from a thermoplastic resin, and examples thereof include a side molding. The resin type is not particularly limited, and various thermoplastic resins can be used. A plate-like engagement rib is integrally formed on the back side of the design surface of the molding body. The height at which the engagement rib protrudes from the back surface of the molding body may be a height that protrudes toward the back surface beyond the mounting hole when the molding body is attached to the vehicle outer plate, or a height that does not exceed the mounting hole. It can also be.

  When the thickness of the engagement rib is increased, sink marks are generated on the design surface of the molding body, and when it is too thin, the coupling strength with the clip is decreased. Therefore, although depending on the type of resin used, the thickness of the engagement rib is preferably 0.8 to 1.5 mm.

  Although the engagement rib can be formed so as to extend in the short direction of the molding body, it is desirable that the engagement rib be formed so as to extend in the longitudinal direction. By doing in this way, it becomes difficult to stand out even if sink marks due to the engagement rib occur. Further, it is desirable that a reinforcing rib continuous in the longitudinal direction of the molding main body is formed on the back surface of the molding main body, and the engaging rib is formed on a part of the reinforcing rib. By doing so, even if sink marks are generated, they become continuous sink marks in the longitudinal direction, so that the design can be formed by the sink marks themselves, and the sink marks can be made more inconspicuous. Further, it is desirable that the reinforcing ribs of the portions other than the engaging ribs have a protruding height lower than the protruding height of the engaging rib.

  In addition, if the molding body has a substantially square shape in the short-side cross section, and if the reinforcing ribs and the engaging ribs are formed along the curved shape of the substantially square shape, the sink marks on the design surface may be made less noticeable. it can.

  Therefore, according to the molding body according to the present invention, sink marks are unlikely to occur on the surface of the design, and even if sink marks occur, it is difficult to stand out. Therefore, a surface layer can be formed on the design surface of the molding body by painting or plating, and high design properties can be expressed.

  The engaging rib is formed with a pair of holding portions for holding the clip. This holding portion has a shape that engages with a pair of molding engaging portions formed on a clip to be described later. For example, the holding portion can be a through hole, a protrusion, a claw, etc., but without using a slide core. A through hole is desirable for molding. In the case of the engaging rib extending in the longitudinal direction, the pair of holding portions are provided apart from each other in the longitudinal direction.

  The clip is formed on the engaging rib and the outer plate engaging portion having a substantially U-shaped cross section having a pair of elastic claw portions that engage with the peripheral portion of the mounting hole by elastic reaction force by being fitted into the mounting hole. A pair of molding engaging portions that engage with the pair of holding portions formed are formed, and the pair of molding engaging portions engage with the holding portions on both sides of the outer plate engaging portion, respectively.

  That is, since the load from the pair of molding engaging portions acts on the outer plate engaging portion evenly from, for example, the left and right sides, the molding main body can be stably fixed to the vehicle outer plate. Further, if the engagement directions of the pair of holding portions and the pair of molding engaging portions are opposite to each other, the load from the pair of molding engaging portions is applied to the outer plate engaging portion, for example, up and down Acts equally from both sides. Accordingly, the stress acting on the vehicle outer plate from the molding body through the outer plate engaging portion acts substantially equally from the top, bottom, left and right directions of the mounting hole, so that the molding body and the clip can be stably attached and twisted. Thus, it is possible to reliably prevent mounting defects of the molding body and the clip.

  The outer plate engaging portion has a substantially U-shaped cross section, and has a pair of elastic claws that engage with the peripheral portion of the mounting hole by an elastic reaction force by being fitted into the mounting hole. Further, the pair of molding engaging portions engage with a pair of holding portions formed on the engaging rib, respectively. If the pair of holding portions is, for example, a through hole, the molding engaging portion can be a protrusion, a claw, or the like that engages with the through hole. Conversely, if the pair of holding portions is, for example, a protrusion or a claw, the molding engaging portion can be a through hole. In these cases, the protrusion directions of the pair of protrusions and claws may be opposite to each other so that the engagement directions of the pair of holding portions and the pair of molding engagement portions are opposite to each other.

  Most of the outer plate engagement part fits into the mounting hole and protrudes to the back side of the outer plate, but the pair of molding engagement parts do not have to be so. It is desirable to be in close proximity. By doing so, the position of the holding portion becomes close to the molding body, so that the height of the engaging rib can be lowered and the molding body can be further prevented from sinking.

  In order to form the molding mounting structure of the present invention, a clip is attached to the molding body in advance by engaging a pair of molding engaging parts and a pair of holding parts, and the clip is pressed against the vehicle outer plate. It can be attached by fitting into the mounting hole of the outer plate engaging portion. Alternatively, the clip may be attached in advance to the mounting hole of the outer plate engaging portion, and the pair of holding portions of the molding body may be attached by engaging with the pair of molding engaging portions of the clip. However, in the latter case, it is necessary for the operator to attach the clip and the molding body, and the number of man-hours increases, so it is desirable to use the former method.

  Hereinafter, the present invention will be specifically described by way of examples with reference to the drawings.

  1 and 2 are exploded perspective views of a molding mounting structure according to this embodiment. This mounting structure includes a molding body 1 manufactured from an ABS resin by injection molding, a plurality of clips 2, and a vehicle outer plate 3. The molding body 1 has a long shape that is bent in a substantially square shape in cross section, and a plating layer (not shown) formed by chromium plating is formed on the design surface. A reinforcing rib 10 having a thickness of about 1.2 mm is formed on the back surface of the molding body 1 to extend along the entire length in the longitudinal direction along a bent portion that is bent in a substantially square shape.

  A plurality of engaging ribs 11 protrude partially from the reinforcing rib 10 in the longitudinal direction at intervals, and each engaging rib 11 has the same thickness as the reinforcing rib 10 and is formed at substantially equal intervals in the longitudinal direction. Yes. A cutout groove 12 extending in the height direction of the engagement rib 11 is formed at the tip of the engagement rib 11, and a pair of through holes (holding portions) 13 are formed between the cutout groove 12 and the molding body 1. ing. The pair of through holes 13 are formed in the longitudinal direction of the molding body 1 at a distance from each other.

  A plurality of mounting holes 30 are formed through the vehicle outer plate 3. The plurality of mounting holes 30 are each formed in a rectangular shape, and are formed at substantially equal intervals in the front-rear direction of the vehicle.

  3 and 4 are a perspective view and a plan view of the clip 2. FIG. The clip 2 includes an outer plate engaging portion 20 having a substantially U-shaped cross section, and a pair of molding engaging portions 21a and 21b formed on the left and right sides of the outer plate engaging portion 20, respectively. Are manufactured in one piece. The outer plate engaging portion 20 includes a pair of elastic claw portions 22 at the tip thereof. This elastic claw portion 22 has a step portion 22a at the tip and a claw portion 22b protruding from the inside of the step portion 22a, and the peripheral portion of the mounting hole 30 by the elastic reaction force by being fitted into the mounting hole 30 Engage with. On the inner peripheral side of the outer plate engaging portion 20, a convex portion 23 protruding from the bottom portion is formed.

  The molding engaging portions 21a and 21b are formed on the left and right sides of the outer plate engaging portion 20, respectively, and have a substantially U-shaped cross section having a pair of leg portions 24a and 24b. A first engaging claw 25 that protrudes toward the leg portion 24b and elastically deforms in a direction approaching and moving away from the leg portion 24b is formed on the leg portion 24a of one molding engaging portion 21a. The other molding engaging part 21b is formed with a second engaging claw 26 that protrudes toward the leg part 24a and is elastically deformable in a direction approaching and moving away from the leg part 24a. The heads of the first engaging claw 25 and the second engaging claw 26 are formed in a claw shape having a tapered surface on the surface, and protrude in opposite directions.

  In order to form the attachment structure of the present embodiment, the clip 2 is first attached to the molding body 1. That is, when the engaging rib 11 is inserted between the pair of leg portions 24a and 24b, the first engaging claw 25 and the second engaging claw 26 are pressed by the engaging rib 11 so that they are bent outward. The engagement rib 11 is allowed to enter due to elastic deformation. When the through holes 13 reach the positions of the heads of the first engagement claw 25 and the second engagement claw 26, the heads of the first engagement claw 25 and the second engagement claw 26 are respectively moved by the elastic reaction force. The molding engaging portions 21 a and 21 b are fixed to the engaging rib 11 by engaging with the through hole 13. The allowances between the heads of the molding engaging portions 21a and 21b and the through holes 13 are designed to be 70% of the thickness of the engaging ribs 11, respectively. At this time, the notch groove 12 formed at the tip of the engagement rib 11 is engaged with the convex portion 23, whereby the clip 2 and the molding body 1 are positioned in the left-right direction. In a state where the heads of the second engaging claws 26 are engaged with the through holes 13, the tip surface of the convex portion 23 is in contact with the bottom surface of the notch groove 12.

  Next, as shown in FIG. 5, the molding body 1 to which the clip 2 is fixed is opposed to the vehicle outer plate 3, and the clip 2 is pressed toward the mounting hole 30. At this time, the clip 2 is guided to a normal position with respect to the mounting hole 30 by the tapered surface 27 extending so as to connect the outer plate engaging portion 20 and the molding engaging portions 21a and 21b. When pressed from the peripheral edge of the mounting hole 30, the outer plate engaging portion 20 enters the mounting hole 30 while being elastically deformed in a direction in which the pair of elastic claws 22 are close to each other. When both end portions in the direction come into contact with the surface of the vehicle outer plate 3, the stepped portion 22 a comes out of the mounting hole 30 and engages with the rear surface of the vehicle outer plate 3 at the periphery of the mounting hole 30, and the elastic claw portion The claw portion 22 b is engaged with the inner peripheral surface of the mounting hole 30 by the elastic reaction force of 22.

  That is, according to the mounting structure of the molding of this embodiment, the stepped portion 22a of the pair of elastic claws 22 is engaged with the peripheral portion of the mounting hole 30 from the back surface side of the vehicle outer plate 3, so that the clip 2 is mounted on the mounting hole 30. Detachment from the clip body 2, the first engagement claw 25 and the second engagement claw 26 engage with the through-hole 13, thereby preventing the molding body 1 from coming out of the clip 2. Both end portions in the direction abut against the surface of the vehicle outer plate 3 and the front end surface of the convex portion 23 abuts against the bottom surface of the notch groove 12 to prevent the clip 2 from being pushed into the rear surface side of the vehicle outer plate 3. Yes.

  A pair of molding engaging portions 21a and 21b are formed on the left and right sides of the outer plate engaging portion 20, and the first engaging claws 25 and the second engaging claws 26 protrude in opposite directions to form the engaging ribs 13. By engaging, it is possible to prevent improper mounting due to twisting or the like and to stably mount the molding body 1 with high accuracy.

  Further, the reinforcing rib 10 with a low height is formed along the bent portion of the molding body 1 so that it is not noticeable even if the plating layer has a sink mark, and there is no problem with resin powder because the slide core is not used. It is avoided and the mall main body 1 expresses high designability.

  As shown in FIG. 6, the mounting structure of the present embodiment is formed such that a pair of molding engaging portions 21 a and 21 b protrude from the claw portions 22 b of the outer plate engaging portion 20, and the molding main body 1 and the vehicle outer plate 3. Example 1 is the same as in Example 1 except that it is positioned between the two.

  According to the mounting structure of the present embodiment, the height of the engaging rib 11 can be made lower than that of the first embodiment, so that the sink of the molding body 1 can be made less noticeable.

  The mounting structure of this embodiment is the same as that of Embodiment 1 except that the clip 2 shown in FIGS. 7 and 8 is used. This clip 2 is the same as the clip 2 of Example 1 except that the structure of the molding engaging portions 21a and 21b is different. That is, the molding engaging portions 21a and 21b are formed on the left and right sides of the outer plate engaging portion 20, respectively, and are formed in a substantially U-shaped cross section having a pair of leg portions 24a and 24b. A first engaging claw 25 that protrudes toward the leg portion 24b and elastically deforms in a direction approaching and moving away from the leg portion 24b is formed on the leg portion 24a of one molding engaging portion 21a. The other molding engaging portion 21b is also formed with a second engaging claw 26 that protrudes toward the leg portion 24b and is elastically deformable in a direction approaching and moving away from the leg portion 24b. The heads of the first engagement claw 25 and the second engagement claw 26 protrude in the same direction.

  Also in the mounting structure of the present embodiment, the pair of molding engaging portions 21a and 21b are engaged with the pair of through holes 13 on both sides of the outer plate engaging portion 20, so that the vehicle outer plate 3 and the clip 2 are connected. The molding body 1 is fixed to the clip 2 on both sides with respect to the engagement portion, and the vehicle outer plate 3 and the molding body 1 can be stably fixed.

  The mall mounting structure of the present invention can be applied not only to a side molding of an automobile but also to various moldings such as a roof molding and a bumper molding.

1: Mall body 2: Clip 3: Vehicle outer plate 10: Reinforcement rib
11: Engaging rib 13: Through hole (holding part)
20: Outer plate engaging portion 21a, 21b: Mall engaging portion
30: Mounting hole

Claims (7)

A long molding body formed by molding from resin and having a design surface, and a clip mounted on the back side of the molding body, and the clip is inserted into a mounting hole provided in a vehicle outer plate. A molding mounting structure in which the molding body is attached to the vehicle outer plate through the clip by combining the clips,
A plate-like engagement rib is integrally formed on the back surface of the molding body, and a pair of holding portions for holding the clip is formed on the engagement rib.
The clip has a substantially U-shaped outer plate engaging portion having a pair of elastic claws that are engaged with the peripheral portion of the mounting hole by elastic reaction force by being fitted into the mounting hole, A pair of molding engaging portions that are engaged with the holding portions of the pair, and the pair of molding engaging portions are respectively engaged with the holding portions on both sides of the outer plate engaging portion. Features a mall mounting structure.   The molding mounting structure according to claim 1, wherein the engagement directions of the pair of holding portions and the pair of molding engaging portions are opposite to each other.   The holding portion is a through-hole penetrating the engagement rib in the thickness direction, and the molding engaging portion is an elastically deformable leg portion and an engaging claw protruding from the leg portion, and a pair of molding engagement members The molding mounting structure according to claim 2, wherein protruding directions of the engaging claws at the joint are opposite to each other.   Reinforcing ribs continuous in the longitudinal direction are formed on the back surface of the molding body, the engaging ribs protrude from a part of the reinforcing ribs, and the pair of holding portions are provided apart from each other in the longitudinal direction. The molding mounting structure according to claim 1 or claim 2.   The mall mounting structure according to claim 4, wherein the molding body has a substantially U-shaped cross section in the short direction, and the reinforcing rib is formed along a substantially U-shaped bent portion.   A groove portion is formed at a tip of the engagement rib, and a plate-like protrusion protruding from the outer plate engagement portion of the clip is engaged with the groove portion. Mounting structure.   The molding mounting structure according to claim 1, wherein the holding portion of the engagement rib is located between the molding body and the vehicle outer plate.

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