JP5103199B2 - Automotive interior parts - Google Patents

Description

  The present invention is an automotive interior part in which an accessory part is mounted on a trim body based on a foamed resin molded body, and in particular, by strengthening the rigidity of the edge of the mounting opening in the trim body, The present invention relates to automotive interior parts with improved mounting accuracy.

  FIG. 13 is a front view showing the luggage side trim 1. The luggage side trim 1 is mounted on the interior side of a luggage room provided at the rear of the vehicle. Since the luggage side trim 1 is lightweight, has excellent rigidity and impact resistance, and is inexpensive, a foamed resin molded body such as a polypropylene (PP) foam is often used. Various accessories are mounted on the luggage side trim 1. For example, a multifunctional hook (for example, suitable for hanging various hangers, bags, etc. on the rear side edge of the luggage side trim 1). An accessory 2 such as a convenience store hook is attached.

  By the way, the luggage side trim 1 is based on the foamed resin molded body as described above, but an injection molding apparatus 3 is used as shown in FIG. The injection molding apparatus 3 includes a movable mold 4, a fixed mold 5, and an injection machine 6 that supplies a foamed resin material M. Then, the movable mold 4 and the fixed mold 5 are clamped, and the foamed resin material M is injected and filled from the injection machine 6 into the cavity C defined by both molds 4, 5. The side mold 4 is retracted by a predetermined stroke to secure a foaming space and perform foam molding to form a desired shape. As shown in FIG. 15, the luggage side trim 1 has a foam layer b formed inside a solid layer a. As described above, Patent Document 1 shows in detail a conventional method of molding a foamed resin molded body represented by the luggage side trim 1 using the injection molding device 3.

JP 2002-120252 A

  Thus, in order to mold the luggage side trim 1 using the conventional method, after the foamed resin material M is injected and filled, the movable side mold 4 is moved backward by a small stroke to secure a foaming space, and then foam molding is performed. As shown in FIG. 15, particularly at the outer peripheral terminal and the opening edge of the luggage side trim 1, the followability with respect to the shapes of the movable mold 4 and the fixed mold 5 is poor. For example, in the engaging structure in which the sagging R is easy to occur, for example, the attachment part 2 is fitted into the attachment opening 1a and the engaging claw 2a of the attachment part 2 is attached to the edge of the attachment opening 1a. As shown in FIG. 16, it has been pointed out that the mounting strength is reduced due to the sagging of R, and a stable mounting strength cannot be obtained.

  The present invention has been made in view of such circumstances, and after a foamed resin material is injected and filled into a mold, the mold is opened and a required shape is provided so that a foam layer is provided inside the solid layer. It is an automotive interior part in which an accessory part is attached to the mounting opening of the trim body based on a molded foam resin molded body with a claw engaging structure. An object of the present invention is to provide an automobile interior part that can be firmly maintained and has improved attachment accuracy of the attached part.

In order to solve the above-mentioned problems, the present invention provides a foamed resin molded article formed by injection-filling a foamed resin material into a cavity of a molding die and encapsulating an outer surface of an internal foam layer with a solid layer. In the interior part for automobiles, in which the accessory part is mounted on the trim body based on the trim body, the trim body is provided with a mounting opening for engaging the accessory part with a claw, and the edge of the mounting opening is also its outer surface is formed of a solid layer, the inside is formed in the foam layer, wherein the edge of the mounting opening, the pawl locking flange comprising only solid layer rich in rigidity is formed, the pawl locking The flange (22) is provided on the rear surface of the edge of the mounting opening (21) as a protruding line protruding in the direction of the rear surface when viewed from the front surface of the trim body (20), whereby the mounting opening ( 21) Solid layer on the outer surface Has become a raised shape from 20a), the claws provided on the accessory by engaged fixed to the pawl locking flange, characterized in that to strengthen the mounting strength of the accessory.

  Here, examples of the interior parts for automobiles include door trims, rear side trims, luggage side trims, etc., and trim bodies as interior parts for automobiles of this type include door trim bodies, rear side trim bodies, and luggage side trim bodies. As accessory parts, there are a convenience store hook, an escutcheon panel for an inside handle, a switch panel, and the like. Also, the foamed resin molded body that is the base of the trim body is composed of a solid layer on the product surface and a foamed layer inside the product. The foamed resin molded body is made of a foaming agent mixed in the thermoplastic resin. Use what was done. The thermoplastic resin used is polyethylene resin, polypropylene resin, polystyrene resin, polyethylene terephthalate resin, polyvinyl alcohol resin, vinyl chloride resin, polyamide resin, polyacetal resin, polycarbonate resin, ionomer resin, It may be appropriately selected from acrylonitrile / butadiene / styrene (ABS) resin and the like. As the foaming agent, an organic foaming agent such as azodicarbonamide or an inorganic foaming agent such as sodium bicarbonate is used.

  Furthermore, the molding die used when molding the foamed resin molding is composed of a movable side die, a fixed side die, and an injection machine connected to the fixed side die. The movable mold performs a mold clamping operation from the mold opening position to the mold clamping position (bottom dead center) by the operation of the drive cylinder. Furthermore, in order to secure a foaming space during the foaming reaction of the foamed resin material, the movable side mold is injected and filled with the foamed resin material into the cavity, and then retracted by a small stroke. Operates to the open position. That is, the movable side mold takes three positions: a mold opening position, a mold clamping position, and a foaming position where a mold clearance is slightly secured from the mold opening position.

  On the other hand, the fixed side mold has a hot runner as a resin passage for injecting and filling the foamed resin material supplied from the injection machine into a cavity defined between the movable side mold and the fixed side mold. A valve gate or the like is provided, and after molding, an ejector mechanism for projecting the foamed resin molded product is provided in the fixed mold. In addition, in the present invention, a flange for securing a claw having a high rigidity is formed along the edge of the attachment opening for attaching the accessory part in the trim body, and thus corresponds to the edge of the attachment opening. The mold is provided with a groove portion that matches the shape of the claw locking flange.

  As is clear from the above configuration, after the foamed resin material is injected and filled into the cavity defined by clamping the movable side mold and the fixed side mold, the movable side mold is moved backward in the mold opening direction. The foamed resin material undergoes a foaming reaction with the foaming space secured to form a foamed resin molded body with a foamed layer in the solid layer into the required shape, and at the edge of the mounting opening to attach the accessory Has a rigid claw flange consisting of only a solid layer, so when fitting the accessory part into the mounting opening and fixing it to the trim body, the locking claw of the accessory part is the opening edge of the mounting opening. The hook is securely engaged with and supported by the claw locking flange provided on the, so that attachment of the accessory parts with high accuracy can be expected.

  As described above, the interior part for automobiles according to the present invention has the accessory part attached to the attachment opening of the trim body made of the foamed resin molded body by the claw engagement method. Since the claw locking flange consisting only of the solid layer is formed, and the claw locking flange of the accessory part is securely and accurately fixed to the claw locking flange, the attached part is rattled, In addition, since no gaps are generated around the accessory parts, it is possible to expect a quiet running and an excellent appearance appearance.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of automobile interior parts according to the present invention will be described below in detail with reference to the accompanying drawings. Note that the gist of the present invention is as described in the scope of claims, and the contents of the embodiments described below are merely examples of the present invention.

  1 to 9 show a first embodiment of the present invention, FIG. 1 is a front view showing a luggage side trim to which the present invention is applied, and FIG. 2 shows a state in which a convenience store hook is attached to a trim body in the luggage side trim. FIG. 3 is a cross-sectional view showing a state where the convenience store hook is attached to the trim main body of the luggage side trim, FIG. 4 is an explanatory view showing the engaging structure of the latch hook of the convenience store hook, and FIG. 5 is the trim main body. FIG. 6 is an explanatory view showing a structure of a molding die for forming a trim main body in the luggage side trim, and FIGS. 7 to 9 are trims in the luggage side trim. It is each explanatory drawing which shows the formation process of a main body.

  In FIG. 1, a luggage side trim 10 is mounted on the interior side of a side wall panel of a luggage room, and various accessory parts are attached to a trim body 20. In this invention, it applies about the form which attaches the convenience store hook 30 to the trim main body 20 as an accessory. Before describing the mounting structure of the convenience store hook 30, the configuration of the trim body 20 in the luggage side trim 10 will be described. Since the trim body 20 is lightweight, has desired rigidity and shock absorption performance, and can be mass-produced, the trim body 20 is configured based on a foamed resin molded body having a solid surface as a product surface and a foam layer inside. As this foamed resin molded article, a foamed resin material in which a foaming agent is mixed in a thermoplastic resin material is used, and usable thermoplastic resins include polyethylene resins, polypropylene resins, polystyrene resins, polyethylene terephthalate. Resin, polyvinyl alcohol resin, vinyl chloride resin, polyamide resin, polyacetal resin, polycarbonate resin, ionomer resin, acrylonitrile / butadiene / styrene (ABS) resin, and the like. Moreover, as a foaming agent, organic foaming agents, such as azodicarbonamide, or inorganic foaming agents, such as sodium bicarbonate, can be used.

  By the way, the luggage side trim 10 in the present invention has improved the mounting accuracy when attaching accessory parts such as the convenience store hook 30 to the trim main body 20 made of a foamed resin molded body and the mounting opening 21 opened in the trim main body 20. It is a feature. Further, in this first embodiment, the luggage side trim 10 has a trim body 20 made of a foamed resin molded body and has an integrated structure, but the upper and lower divided bodies of the trim upper and the trim lower may be joined and fixed. In that case, both the trim upper and trim lower may be molded from a foamed resin molded body, but the trim upper may be a foamed resin molded body and the trim lower may be a non-foamed resin molded body.

  Next, a structure for attaching the convenience store hook 30 to the trim main body 20 based on the foamed resin molded body will be described with reference to FIGS. 2 to 5 as to the characteristic configuration of the luggage side trim 10 according to the present invention. First, the molding method of the trim body 20 will be described later. After the foamed resin material is injected and filled in the mold, the foam body is reacted to form a solid layer 20a on the outer surface and an inner surface as shown in FIG. Each has a foam layer 20b. A mounting opening 21 is provided at a place where the convenience store hook 30 is mounted, and a rigid nail locking flange 22 made of only the solid layer 20a on the rear surface of the edge of the mounting opening 21 is convex toward the back surface. It is set up as an article. In terms of dimensions, as shown in FIG. 4, the height (indicated by symbol h) of the claw locking flange 22 is set to 0.5 mm, and the width (indicated by symbol w) is set to 1.0 mm. . Then, the claw locking flange 22 enhances the rigidity of the periphery of the mounting opening 21 of the trim main body 20, so that deformation such as undulation deformation does not occur at the edge and the convenience store hook 30 is engaged with the claw. It has a function to strengthen the engagement strength.

  Next, as shown in FIGS. 2 and 3, the convenience store hook 30 to be mounted in the mounting opening 21 is composed of a two-piece body of a mounting base 31 and a hook body 32, and each includes a polyethylene resin, a polypropylene resin, General-purpose thermoplastics such as polystyrene resin, polyethylene terephthalate resin, polyvinyl alcohol resin, vinyl chloride resin, polyamide resin, polyacetal resin, polycarbonate resin, ionomer resin, acrylonitrile / butadiene / styrene (ABS) resin It consists of a resin injection-molded body. The hook body 32 is integrated with a hook portion 33 for hanging bags, clothes hangers and the like, and the mounting base 31 is fastened to the body panel P before the mounting base 31 and the hook body 32 are assembled. 34 is fixed to the vehicle body panel P. On the other hand, the hook body 32 is provided with a seal piece 35 for sealing the surface of the trim body 20 as an edge sealing material, and is engaged with the claw locking flange 22 provided at the periphery of the mounting opening 21 of the trim body 20 described above. Locking claws 36 for wearing are provided on both sides of the mounting base 31. Therefore, as shown in FIG. 4, the locking claw 36 in the convenience store hook 30 is firmly engaged with the claw locking flange 22 provided at the edge of the mounting opening 21, so that the convenience store hook 30 can be accurately attached. In addition, the trim body 20 can be firmly attached to the trim body 20.

  Next, a schematic configuration of the molding die 40 used for molding the trim body 20 in the luggage side trim 10 will be described with reference to FIG. The molding die 40 is generally composed of a movable die 50, a fixed die 60, and an injection machine 70. More specifically, the movable mold 50 is driven to take three positions of a foaming position in addition to a mold clamping position and a mold opening position by an operation of a drive cylinder (not shown). On the other hand, the fixed-side mold 60 is supplied with a foamed resin material through a hot runner 61 and a valve gate 62 serving as a resin passage for the molten resin supplied from the injection machine 70, and also projects a foamed resin molded product after molding. The ejector pin 63 is internally provided.

  Further, the trim main body 20 in the luggage side trim 10 is formed into a required shape along the cavity C shape defined between the movable side mold 50 and the fixed side mold 60. In order to form the mounting opening 21 at 20, a convex portion 51 and a concave portion 64 are respectively set in the movable side mold 50 and the fixed side mold 60 in accordance with the mounting opening 21. A groove 65 for forming a claw locking flange 22 with enhanced rigidity is formed at the edge of 21.

  Each step of molding the trim body 20 using the molding die 40 will be described with reference to FIGS. First, as shown in FIG. 7, after the movable side mold 50 is clamped with respect to the fixed side mold 60, the foamed resin material M is injected and filled into the cavity C through the hot runner 61 and the valve gate 62 from the injection machine 70. . At this time, although not shown, it is also possible to adopt a counter pressure method in which air is forcibly introduced from the outside into the cavity C and the resin is filled in the cavity C so that the foamed resin material M does not undergo a foaming reaction.

  When the above-described injection filling process of the foamed resin material M is completed, as shown in FIG. 8, the movable side mold 50 is retracted in the mold opening direction. The backward movement of the movable mold 50 is performed by adjusting the internal pressure of the cavity C in order to perform the foaming reaction effectively.

  Subsequently, as shown in FIG. 9, after the movable side mold 50 moves backward, a foaming reaction of the foamed resin material M is induced, the solid layer 20 a is formed on the outer surface, and the foam layer 20 b is formed inside. The At this time, the mounting opening 21 is opened in the trim main body 20 and the claw-engaging flange made of only the solid layer 20a at the edge of the mounting opening 21 so as to match the shape of the groove 65 of the stationary mold 60. 22 is integrally formed. Therefore, the trim main body 20 used in the present invention can be easily formed by a simple process of processing the groove 65 on the fixed mold 60 side.

  10 to 12 show a second embodiment of the present invention, FIG. 10 is a front view showing a rear side trim, and FIG. 11 is a cross-sectional view showing a mounting structure for attaching leg pieces of an escutcheon panel to the rear side trim. FIG. 12 is an explanatory view showing a state when the trim body is molded. The second embodiment is applied to a structure in which the luggage side trim 10 of the first embodiment is replaced with a rear side trim 80 and the convenience store hook 30 is replaced with an escutcheon panel 90.

  That is, the rear side trim 80 shown in FIG. 10 is configured by attaching accessory parts such as an escutcheon panel 90 to the trim main body 20 made of a foamed resin molded body. The trim main body 20 in the rear side trim 80 is made of a foamed resin molded body that is lightweight, has a desired rigidity and shock absorption performance, and can be molded at low cost, and includes a locking claw 91 of the escutcheon panel 90. The point which formed the nail | claw latching flange 22 which can be fixedly engaged stably with high precision is the same as 1st Example. That is, as shown in FIG. 11, the locking claw 91 of the escutcheon panel 90 is engaged and supported by a claw locking flange 22 provided at the edge of the mounting opening 21 in the trim body 20. In the second embodiment, the flange 22 is set to have a height (indicated by a symbol h) of 1 mm and a width (indicated by a symbol w) of 1 mm. And the method of shape | molding the trim main body 20 in the rear side trim 80 can set the flange 22 for nail | claw latching easily by setting the groove part 65 to the fixed side metal mold | die 60, as shown in FIG. . Since the basic configuration of the molding die 40 is the same as that of the first embodiment, the configuration of the molding die 40 and the molding process are omitted here. Therefore, the latching claw 91 of the escutcheon panel 90 can be engaged and held with high accuracy by the claw latching flange 22 at the edge of the mounting opening 21 of the trim body 20 in the rear side trim 80. That is, as shown in FIG. 12, the claw locking flange 22 has only the solid layer 20a due to the cooling effect of the portion that contacts the mold surface, and the fitting position of the escutcheon panel 90 with the locking claw 91 is stabilized.

  In the first and second embodiments described above, the form in which the accessory parts 30 and 90 are attached to the trim main bodies 20 of the luggage side trim 10 and the rear side trim 80 has been described. However, the foamed resin including the solid layer 20a and the foamed layer 20b. The present invention can be applied to all structures in which an accessory is fixed to a claw with respect to a mounting opening 21 of a molded body. Thus, the uses of the trim main body 20 and the accessory parts 30 and 90 are not limited. Further, in the molding process of the foamed resin molded body, a counter pressure method in which air, gas or the like is injected into the cavity C at the time of injection filling of the foamed resin material M can be adopted.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing a luggage side trim that is a first embodiment of an automobile interior part according to the present invention. It is explanatory drawing which shows the form which attaches a convenience store hook to the trim main body in the luggage side trim shown in FIG. It is the III-III sectional view taken on the line in FIG. It is an expanded sectional view which shows the principal part of the attachment structure of the convenience store hook shown in FIG. It is the perspective view which looked at the attachment part of the convenience store hook in the luggage side trim shown in FIG. 1 from the back surface side. It is explanatory drawing which shows schematic structure of the shaping die which shape | molds the trim main body in the luggage side trim shown in FIG. It is explanatory drawing which shows the injection filling process of the foamed resin material in the molding method of the trim main body of the luggage side trim shown in FIG. It is explanatory drawing which shows the retreat state of the movable side metal mold | die in the shaping | molding method of the trim main body of the luggage side trim shown in FIG. It is explanatory drawing which shows the foam molding process in the molding method of the trim main body of the luggage side trim shown in FIG. It is a front view which shows the rear side trim which is 2nd Example of the interior component for motor vehicles based on this invention. It is the XI-XI sectional view taken on the line in FIG. It is explanatory drawing which shows the state at the time of shaping | molding of the trim main body in the rear side trim shown in FIG. It is a front view which shows the conventional luggage side trim. It is explanatory drawing which shows the shaping die which shape | molds the trim main body in the conventional luggage side trim. It is explanatory drawing which shows the state at the time of shaping | molding of the conventional foaming resin molding. It is explanatory drawing which shows the malfunction point of the attachment structure of the conventional accessory.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Luggage side trim 20 Trim main body 21 Mounting opening 22 Claw locking flange 30 Convenience hook 31 Mounting base 32 Hook main body 33 Hook part 36 Locking claw 40 Molding die 50 Movable side die 60 Fixed side die 61 Hot runner 62 Valve gate 63 Ejector pin 64 Recessed portion 65 Groove portion 70 Injection machine 80 Rear side trim 90 Escussion panel C Cavity M Foamed resin material

Claims (1)

Foam formed by injection-filling the foamed resin material (M) into the cavity (C) of the molding die (40) and encapsulating the outer surface of the internal foam layer (20b) with the solid layer (20a). In an automobile interior part (10) in which an accessory part (30) is mounted on a trim body (20) based on a resin molded body,
The trim body (20) is provided with a mounting opening (21) for engaging the attachment part (30) with a claw,
The edge of the mounting opening (21) also has an outer surface formed of a solid layer (20a), and an interior thereof formed of a foam layer (20b).
Wherein the edge of the mounting opening (21), the pawl locking flange comprising only solid layer (20a) which is rich in rigidity (22) is formed,
The claw locking flange (22) is provided around the rear surface of the edge of the mounting opening (21) as a ridge protruding in the direction of the rear surface when viewed from the front surface of the trim body (20). The mounting opening (21) has a raised shape from the solid layer (20a) on the outer surface,
The attachment strength of the accessory part (30) is reinforced by engaging and fixing the engaging claw (36) provided on the accessory part (30) to the flange (22) for engaging the claw. Automotive interior parts.

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