JP2009292438A - Automobile interior component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and securely attach a blindfold sheet to the reverse face of a speaker grille when no-speaker for a vehicle is specified; and to enhance visual quality of the speaker grille. <P>SOLUTION: A door trim body 20 is constituted of injection molded product of thermoplastic material, punched with a number of holes 30a and has the speaker grille 30, on the reverse face of which grid-like ribs 31 are formed. Parts of grid-like ribs 31 are provided with protrusions (weld member) 32, protruded to a prescribed length from the reverse face. The protrusion 32 is inserted through a slit 41 of the blindfold sheet 40 and the tip of the protrusion 32 is caulked with ultrasonic welding. Thus, the blindfold sheet 40 is easily and securely attached to the reverse face of the speaker grille 30. Therefore, the grille, having no adhesive surface unlike the conventional product, is free from dust and grit, hygienic, and has preferable appearance. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an interior part for an automobile, in which a trim main body having a speaker grille having a large number of punching holes and having a polygonal rib disposed on the back surface is employed, and particularly without a speaker. The present invention relates to an interior part for an automobile that can securely and visually fix a blindfold sheet on the back surface of a speaker grill.

  FIG. 8 is a front view showing an automotive door trim 1 attached to the interior side of the door panel. The automotive door trim 1 is configured by mounting various functional parts on a door trim main body 2 made of a resin molded body as a base. ing. For example, an inside handle unit 2a is attached to the front side of the middle part of the door trim main body 2, and an armrest 2b that bulges indoors is formed substantially at the center of the door trim main body 2, and is formed on the upper surface of the armrest 2b. A power window switch unit 2c and a pull handle unit 2d are attached. A pocket opening 2e having a pocket function is opened below the armrest 2b, a pocket back cover 2f is attached to the back side of the pocket opening 2e, and a speaker grill 3 is provided on the front side of the pocket opening 2e. It is provided integrally with the door trim body 2. This speaker grill 3 is provided with a punching block provided in a molding die for molding the door trim main body 2, and a large number of punching holes 3a are opened. On the back surface of the speaker grill 3, a moldability is secured. And in order to strengthen rigidity, the polygonal rib 3b is arrange | positioned by the predetermined pattern shape (refer FIG. 9 thru | or FIG. 11 about the punching hole 3a and the polygonal rib 3b).

  Then, depending on the specification, there is a vehicle-mounted speaker, and in the vehicle-mounted speaker 4 specification, the vehicle-mounted speaker 4 is attached to the back side of the speaker grille 3 as shown in FIG. Here, a support rib 3c is erected on the periphery of the polygonal rib 3b in the speaker grill 3, and a seal pad 4a made of a frame-like urethane foam is affixed to the front end surface of the support rib 3c. The seal pad 4a is tightly sealed.

  In addition, in a low-priced vehicle, there may be a specification without a vehicle-mounted speaker 4, and in order to share the door trim main body 2 provided with the speaker grille 3, as shown in FIG. The actual situation is that a blindfold sheet 5 such as a sheet, a foamed resin sheet (polyethylene foam, polypropylene foam) or the like is attached to blind the vehicle body. As shown in FIG. 11, with the adhesive 5a applied to the surface facing the speaker grill 3, the outer shape of the blindfold sheet 5 is made to follow the inner periphery of the support rib 3c over the entire back surface of the speaker grill 3. The blindfold sheet 5 is stuck so as to spread. A conventional example in which a speaker grill is integrated with a door trim is disclosed in Patent Document 1.

Japanese Patent Application Laid-Open No. 08-118407

  As described above, in the conventional automobile door trim 1, when the specification with the in-vehicle speaker 4 is provided, the in-vehicle speaker 4 is supported and fixed to the support rib 3c on the rear surface of the speaker grill 3, but the specification without the in-vehicle speaker 4 is provided. In this case, the blindfold sheet 5 made of a nonwoven fabric or a foamed resin sheet is attached to the back surface of the speaker grill 3 via the adhesive 5a. Therefore, when the vehicle-mounted speaker 4 is not used, the punching hole 3a of the speaker grill 3 is used. Since dust or dust adheres to the adhesive surface, dust tends to accumulate, and the adhesive surface stands out indoors through the punching hole 3a, so that the appearance is not preferable and the attaching work of the blindfold sheet 5 is troublesome. It is said that it is difficult to maintain the blindfold function over a long period of time due to deterioration of the adhesive property, easily peeled off due to deterioration of the adhesive 5a, etc. It has been pointed out problems.

  The present invention has been made in view of such circumstances, and is an automotive interior part that employs a trim body having a speaker grille having a large number of punching holes and a polygonal rib disposed on the back surface. And in the case of specifications without a vehicle-mounted speaker, the blindfold sheet can be fixed easily and reliably on the back side of the speaker grille, and it is preferable for hygiene without dust or dust being attached, and the adhesive surface is not visible. The object is to provide an automotive interior part with high practical value, which is also desirable in appearance, is difficult to peel off, and can be easily fixed.

  In order to solve the above-described problems, the present invention is formed by injection-molding a thermoplastic resin material into a molding die to form a required shape, and a large number of punching holes are opened. In an interior part for an automobile that partially employs a trim main body including a speaker grill provided with a shape rib, a protrusion extending toward the back side is projected from a part of the polygonal rib in the speaker grill, A feature is that the blindfold sheet is fixed to the back surface of the speaker grille by caulking and joining the protrusions by welding.

  Here, as automobile interior parts, interior parts with speaker grills can be applied to automobile door trims, rear parcel shelves, rear side trims, etc., and trim bodies include door trim bodies, rear parcel shelf bodies, rear side trim bodies. Etc. are applicable. Further, as the trim main body, a trim main body having an integral structure can be adopted, but a trim main body having a split structure such as an upper and lower split structure may be adopted. The trim body is formed of a thermoplastic resin material into the required shape by injection molding, etc., and many punching holes are opened by the punching block placed in the molding die, and the polygonal ribs are arranged on the back surface. Thus, the speaker grill is integrally formed.

  Furthermore, a blindfold sheet is used in the case of the specification without a vehicle-mounted speaker, but a protrusion is provided on a part of the polygonal rib disposed on the back surface of the speaker grill as a fixing means for the blindfold sheet. The protrusions are set to dimensions that allow for the thickness of the blindfold sheet and caulking at the time of caulking, and are set to be 3 to 5 mm longer than the reference surface of a normal polygonal rib. The shape of the projection may be arbitrarily selected, and is a round boss shape, a square boss shape, or a polygonal rib or boss shape such as a triangular rib, a square rib, or a hexagonal rib urged to a polygonal rib shape. And a composite of the rib shape.

  Next, in the case of specifications without a vehicle-mounted speaker, the blindfold sheet can be a foamed resin sheet such as a nonwoven fabric sheet, polyethylene foam, polypropylene foam, etc., and slits or pores for inserting welding protrusions are opened. . Therefore, in order to fix the blindfold sheet to the rear surface of the speaker grill, the blindfold sheet is overlapped with the rear surface of the speaker grill, the protrusion is inserted into the slit or pore of the blindfold sheet, and the tip of the protrusion is exposed. By performing caulking and joining by sonic welding or the like, the blindfold sheet can be fixed to the rear surface of the speaker grill easily and reliably.

  At this time, if the projection is set to have a round boss shape and the blindfold sheet is opened corresponding to a round hole having substantially the same diameter, the leakage of molten resin through the slits and pores during the welding process of the blindfold sheet is restricted. be able to. Furthermore, if the trim main body and the blindfold sheet are made of the same material, the welding strength of the caulking joint portion can be enhanced by the compatibility of both in the welding process.

  As is clear from the above configuration, in the case of the specification without a vehicle-mounted speaker, the blindfold sheet is overlapped on the back surface of the speaker grille, and the projection provided on a part of the polygonal rib is used as a welding member to weld and bond the blindfold sheet. Therefore, since a conventional pressure-sensitive adhesive is not used, it is preferable from the viewpoint of appearance, and since dust, dust, etc. are not attached, dirt is hardly noticeable and appearance is preferable. In addition, since the fixing work of the blindfold sheet may be performed by welding, the workability can be improved as compared with the fixing work using a troublesome adhesive, and the fixing strength is stable over a long period of time.

  As described above, the interior trim part for an automobile according to the present invention includes a speaker grille in which a trim body constituting a part thereof has a number of punching holes and a polygonal rib on the back surface. , Protrusion that protrudes to the back side is provided on a part of the polygonal rib, and when the specifications are without in-vehicle speakers, the projection can be attached to the blindfold sheet as a welding member to easily fix the blindfold sheet. Thus, workability is improved, and good mounting strength can be ensured over a long period of time. Further, since there is no adhesive surface, dust, dust, etc. are not attached, and there are various effects of being hygienic and excellent in appearance appearance.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of an automobile interior part according to the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the gist of the present invention is as described in the claims, and the contents of the embodiments described below are merely examples of the present invention.

  1 to 7 show an embodiment of the present invention. FIG. 1 is a front view showing an automobile door trim to which the present invention is applied. FIG. 2 shows a form in which a blindfold sheet is fixed to a speaker grill in the door trim. FIG. 3 is a sectional view showing the configuration of the speaker grill in the door trim, FIG. 4 is a perspective view of the speaker grill in the door trim as viewed from the back side, and FIG. 5 shows a form in which a blindfold sheet is fixed to the speaker grill. FIG. 6 is an explanatory view showing a modification of the speaker grille, and FIG. 7 is a cross-sectional view showing a specification with a vehicle-mounted speaker.

  In FIG. 1, an automotive door trim 10 is configured by mounting various functional parts on a door trim body 20 as a base. For example, the inside handle unit 21 is attached to the front side of the middle part of the door trim main body 20, and the front side of the door trim main body 20 is formed in a bulging shape indoors so that the occupant can put his elbow A resting armrest 22 is provided. On the upper surface of the armrest 22, a switch unit 23 including a switch group such as a power window switch and a door lock switch and a pull handle unit 24 are attached. Further, a pocket opening 25 is opened below the armrest 22, and a pocket back cover 26 made of a resin molded body is attached to the back side of the pocket opening 25, and a door pocket that can accommodate equipment is formed. A speaker grill 30 is formed integrally with the door trim body 20 on the front side.

  The door trim body 20 is formed into a desired curved surface shape by injection-filling a thermoplastic resin material into a molding die. Although not shown, the speaker grill 30 having a number of punching holes 30a is integrally formed by disposing a punching block in the molding die. As shown in FIG. 2, the speaker grill 30 is provided with a grid-like rib 31 as a resin supply path to the speaker grill 30 and as a reinforcing portion that reinforces rigidity. And in the door trim 10 which concerns on this invention, the protrusion 32 is provided in four places on the back surface side of the grid | lattice-like rib 31 in this speaker grill 30. FIG. In addition, you may change arbitrarily the shape of the grid | lattice-like rib 31, and in that case, polygonal ribs, such as a triangular rib and a hexagonal rib, are used.

  In this embodiment, the protrusion 32 has a shape in which an outer peripheral rib 32b extending in four directions is integrated with the outer surface of the round boss 32a at the intersection of the lattice-like ribs 31, and is set to be 4 mm higher than the other portions. However, the shape and dimensions of the protrusion 32 are not limited as long as they function during ultrasonic processing. Further, when the rib shape is a triangle or a hexagon, the shape of the protrusion 32 follows the shape.

  Next, a form of forming the door trim body 20 will be described for reference. The thermoplastic resin materials used are polyethylene resin, polypropylene resin, polystyrene resin, polyethylene terephthalate resin, polyvinyl alcohol resin, vinyl chloride resin, polyamide resin, polyacetal resin, polycarbonate resin, ionomer resin. There are resin, acrylonitrile / butadiene / styrene (ABS) resin, and the like, and the resin is molded into a required shape by injection-filling a thermoplastic resin material in an injection mold. Moreover, the automotive door trim 10 according to the present invention can be shared by both the specification with and without the vehicle-mounted speaker.

  FIGS. 2 to 6 show a low-priced type without a vehicle-mounted speaker, and FIG. 7 shows a case with a vehicle-mounted speaker. The feature of the present invention is that the blindfold sheet 40 can be fixed easily and attractively in the specification without a vehicle-mounted speaker.

  Therefore, as described above, of the grid-like ribs 31 disposed on the back surface of the speaker grill 30, the protrusions 32 projecting to the back surface side of a predetermined dimension are formed at four locations so as to correspond to the protrusions 32. In addition, a slit 41 is also provided for the blindfold sheet 40. In this embodiment, since the protrusion 32 is composed of the round boss 32a and the outer peripheral rib 32b, the cross-shaped slit 41 is used. However, a cross-shaped fine hole can also be used. As the blindfold sheet 40, a non-woven sheet, a foamed resin sheet (polyethylene foam, polypropylene foam) or the like can be used, and a support for supporting a seal pad for sealing the vehicle-mounted speaker 60 along the periphery of the back surface of the speaker grill 30. The ribs 33 are formed so as to project in a frame shape. As shown in FIGS. 3 and 4, as shown in FIGS. 3 and 4, the blindfold sheet 40 is placed on the back surface of the speaker grill 30 so as to fit along the inner peripheral surface of the support ribs 33. The protrusions 32 of the grid ribs 31 are overlapped, inserted into the slits 41 of the blindfold sheet 40, and the tips of the protrusions 32 are crimped (the crimped portion is indicated by a), so that the blindfold sheet 40 can be easily and reliably attached. The fixing operation can be completed.

  Based on FIG.2 and FIG.5, the fixation operation | work of the blindfold sheet | seat 40 is demonstrated concretely. First, as shown in FIG. 2, a blindfold sheet 40 is set at an attachment position with respect to the rear surface of the speaker grill 30 with the rear surface of the door trim main body 20 facing the upper surface. Position so that the outer peripheral edges of 40 coincide. At this time, by inserting the protrusion 32 of the speaker grill 30 into the slit 41 of the blindfold sheet 40, the blindfold sheet 40 can be quickly positioned at an appropriate position. Thereafter, as shown in FIG. 5A, the ultrasonic horn 51 is set on the ultrasonic processing jig 50 and pressed against the tip of the protrusion 32 to perform ultrasonic processing. As shown in FIG. 5, by forming the crimped portion a at the tip of the protrusion 32, the blindfold sheet 40 can be fixed to the back surface of the speaker grill 30 easily and reliably. Therefore, since no pressure-sensitive adhesive is used as in the prior art, dust, dust, etc. are not attached, it is hygienic, and appearance is preferable, positioning can be easily performed, and fixing workability is excellent. With the advantages of

  In addition, since the projections 32 further projecting from the lattice ribs 31 are welded, the distance to the surface of the speaker grill 30 makes it difficult for the molten resin to leak to the surface side, and the surface of the speaker grill 30 is affected. Hateful.

  FIG. 6 shows a modification of the present invention. In the drawing, projections 32 constituted only by round bosses 32a are provided on the back side of the lattice ribs 31 of the speaker grill 30. ing. Further, the blindfold sheet 40 is provided with a round hole 42 having the same diameter as that of the round boss 32a. Therefore, when the blind cover 40 is overlapped on the back surface of the speaker grill 30, the round boss 32a is inserted into the round hole 42, and the tip of the round boss 32a is joined by crimping by ultrasonic welding, the round boss 32a and the round hole 42 are joined. Therefore, the molten resin does not leak to the surface side, and the crimping accuracy can be further improved. Further, although not shown, if the same resin material is used for the door trim main body 20 and the blindfold sheet 40, the caulking strength of the caulking joint portion can be enhanced by the compatibility of the resin.

  Next, for reference, the on-vehicle speaker specification will be described with reference to FIG. The vehicle-mounted speaker 60 is built in the back side of the speaker grill 30 and a seal pad 61 made of urethane foam or the like is attached to the front end surface of a support rib 33 erected on the periphery of the back surface of the speaker grill 30. The surface periphery of the vehicle-mounted speaker 60 is sealed by 61. In addition, in the case of the specification with the in-vehicle speaker, the projection 32 is required not to interfere with the in-vehicle speaker 60, and the size of the projection 32 is a size that allows for the thickness of the blindfold sheet 40 and the caulking in the caulking process. When the vehicle-mounted speaker 60 is used, it is adjusted to a dimension (about 3 to 5 mm) that avoids interference with it.

  The embodiment described above has a structure in which the speaker grill 30 is applied to the door trim main body 20 in the door trim 10. However, the embodiment can be applied to all interior parts including a speaker grill such as a rear parcel shelf and a rear side trim. In the embodiment, the lattice-like ribs 31 are employed as the polygonal ribs on the back surface of the speaker grill 30. However, the pattern shape can be changed to a triangular shape or a hexagonal shape. Furthermore, the shape of the protrusion 32 as the welding member can be formed only by the round boss 32a for punching and extruding, and a plate-like rib shape without the round boss 32a can also be used. It should be noted that the trim body and the speaker grill may be configured separately, for example, by attaching a speaker grill formed by injection molding to the wood core trim body.

1 is a front view showing an automobile door trim showing an embodiment of an automobile interior part according to the present invention. It is explanatory drawing which shows the form which adheres a blindfold sheet | seat to the speaker grille back surface side in the door trim for motor vehicles shown in FIG. FIG. 3 is a sectional view taken along line III-III in FIG. 1. It is the perspective view which looked at the speaker grille in the door trim for vehicles shown in Drawing 1 from the back side. It is explanatory drawing which shows the form which superimposes a blindfold sheet | seat on the back surface of the speaker grille in the door trim for motor vehicles shown in FIG. 1, and welds. It is explanatory drawing which shows the relationship between the speaker grille and a blindfold sheet | seat in the modification of the interior component for motor vehicles which concerns on this invention. It is sectional drawing which shows the specification which installs a vehicle-mounted speaker in the door trim for motor vehicles shown in FIG. It is a front view which shows the conventional door trim. It is sectional drawing which shows the structure of the conventional specification with a speaker. It is sectional drawing which shows the structure of the conventional specification without a speaker. It is explanatory drawing which shows the state which affixes a blindfold sheet | seat on the speaker grill in the conventional speakerless specification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Automotive door trim 20 Door trim main body 21 Inside handle unit 22 Armrest 23 Switch unit 24 Pull handle unit 25 Pocket opening 26 Pocket back cover 30 Speaker grill 30a Punching hole 31 Grid-like rib 32 Protrusion (welding member)
32a round boss 32b outer peripheral rib 33 support rib 40 blindfold sheet 41 slit 42 round hole 50 ultrasonic processing jig 51 ultrasonic horn 60 in-vehicle speaker 61 seal pad a caulking processing part

Claims (3)

A thermoplastic resin material is injection-filled into a molding die to be molded into a required shape, and a number of punching holes (30a) are opened, and a polygonal rib (31) is disposed on the back surface. In an automotive interior part (10) that partially employs a trim body (20) provided with a speaker grill (30),
A projection (32) extending toward the back surface is provided on a part of the polygonal rib (31) of the speaker grill (30), and the projection (32) is crimped and joined by welding, thereby providing a blindfold sheet. An automotive interior part, wherein (40) is fixed to the back surface of the speaker grill (30).   The protrusion (32) is formed only by the round boss (32a), and a corresponding round hole (42) is formed in the blindfold sheet (40), so that the protrusion (32) is melted during the welding process. The automobile interior part according to claim 1, wherein leakage of the resin is restricted.   The trim body (20) and the blindfold sheet (40) are made of the same type of thermoplastic resin material. When the projection (32) and the blindfold sheet (40) are welded, the crimping strength is enhanced by the compatibility. The interior part for automobiles according to claim 1 or 2, wherein

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