JP2008074123A - Door trim - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door trim which is produced at a low cost while having a collision energy absorption capability and a sound absorbing property. <P>SOLUTION: The door trim is constituted by mutually coupling a trim body 10 inside a cabin with a rear panel 20 outside the cabin. The rear panel 20 has a porous layer which contains fibers and has the sound absorbing property. The rear panel 20 is integrally formed with an uneven-shaped energy absorbing part 21 by press molding. The energy absorbing part 21 absorbs collision energy caused between a crew and a door at the time of vehicle collision, and protects the crew. Further, the rear panel 20 is integrally formed with a recess 25 for a pocket continuous with the door pocket 12 of the trim body 10 and a decorative part 26 enabling the trim body 10 to close an opening 11 by press molding. A decorative skin 27 is stuck on the surface of the decorative part 26 inside the cabin. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle door trim, and more particularly to a door trim having energy absorption and sound absorption at the time of a collision.

The door trim disclosed in Patent Document 1 includes a trim main body and an energy absorbing member attached to the back surface thereof. This energy absorbing member is attached to the rear surface of the trim body at a location where the occupant's waist hits the vehicle in the event of a vehicle side collision. Absorbs and protects passengers.
In the conventional example shown in FIG. 7 of Patent Document 1, a foamed resin such as a urethane pad is used as the energy absorbing member, and in the embodiments shown in FIGS. 1 to 6, a resin spring is used.

On the other hand, the door is also required to have a sound absorbing property for absorbing external noise. Therefore, generally, a felt-like sound absorbing material is attached to the back surface of the door trim body.
JP 2004-50862 A

  In the door trim of the configuration of Patent Document 1, in order to obtain impact energy absorption and sound absorption, it is necessary to separately attach the energy absorption member and the sound absorption material to the trim body, which requires a large number of parts and a large number of assembly steps. For this reason, there is a drawback that the manufacturing cost becomes high.

The present invention has been made to solve the above-mentioned problems, and is configured by connecting a trim body inside a vehicle and a back panel outside the vehicle in a door panel, and the back panel contains a porous layer containing fibers. And at least a part of the back panel has an uneven shape and is provided as an energy absorbing portion.
According to the above configuration, noise outside the vehicle can be absorbed by the porous layer of the back panel. Moreover, the energy absorption part of a back panel can absorb the impact energy at the time of a collision, and can protect a passenger | crew. At this time, in the porous layer of the back panel, it becomes a crushed piece by impact and the fibers are held together without collapsing at a stretch, so that the amount of energy absorption can be increased.
Thus, since the back panel has both sound absorption and energy absorption, the number of parts and the number of assembly steps can be reduced, and the manufacturing cost can be reduced.

  Preferably, the back panel is made of only a porous material, and a film is attached to the inner surface of the vehicle. According to this, it is possible to prevent the external noise, which is absorbed and attenuated by the porous layer of the back panel, from being transmitted into the vehicle by the film. In this way, transmission of external noise into the vehicle can be more reliably prevented by sound absorption by the back panel and sound insulation by the film.

  Preferably, the trim main body has a door pocket, and the back panel integrally has a pocket concave portion continuous with the door pocket. According to this, it is not necessary to separately attach a member having a pocket recess to the trim body, thereby further reducing the number of parts and the number of assembly steps.

  Preferably, the trim main body has an opening, and the back panel integrally has a decorative portion that closes the opening, and a decorative skin is attached to the inner surface of the decorative portion. According to this, it is not necessary to separately attach a member having a decorating part to the trim body, thereby further reducing the number of parts and the number of assembly steps.

  The energy absorbing portion and the pocket concave portion, the decorative portion, and the like provided as necessary can be simultaneously formed by press molding of the back panel.

  According to the present invention, it is possible to provide a low-cost door trim having a small number of parts and an assembling man-hour while having collision energy absorption and sound absorption.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the door trim includes a trim body 10 on the vehicle inner side and a back panel 20 on the vehicle outer side. As shown in FIG. 2, the back panel 20 is disposed between the trim body 10 and the door panel 30 of the vehicle body.

  As shown in FIG. 1, the trim body 10 is made of a polypropylene injection-molded product, and an opening 11 extending in the front-rear direction is formed on the upper portion thereof, and a door pocket 12 is formed on the lower side thereof. Further, a support portion 13 for supporting the power window operation portion is formed in front of the lower edge portion of the opening 11.

  As shown in FIG. 2, the said back panel 20 consists of a laminated base material containing the 1st layer 21 and the 2nd layer 22 over the whole region. Both the first layer 21 and the second layer 22 are made of a resin such as polypropylene or polyethylene containing glass fibers (others may be polyester or vinylon fibers), and form a porous layer (foamed layer). However, the expansion ratio of the first layer 21 is 1.5 to 8 times, and the expansion ratio of the second layer is 10 to 30 times. The first layer 21 with the lower expansion ratio is disposed on the vehicle interior side, and the second layer 22 with the higher expansion ratio is disposed on the vehicle exterior side.

The back panel 20 is a porous layer (foamed layer), but is not flexible and has a predetermined rigidity and shape retention.
A non-breathable film 23 made of polypropylene, polyester, nylon (trade name) or the like is attached to the entire area of the inner surface of the back panel 20.

  As shown in FIG. 1, the rear side part of the lower part of the said back panel 20 comprises uneven | corrugated shape, and the energy absorption part 24 is provided by this. In this embodiment, the energy absorbing portion 24 has four (plural) convex portions 24a that protrude outwardly from the vehicle. However, the energy absorbing portion 24 may be constituted by a single convex portion, or may protrude inward of the vehicle. It may be.

  As shown in FIG. 2, the top surface (surface outside the vehicle) of the convex portion 24 a abuts on the door panel 30, and the inner surface of the rear panel 20 adjacent to the convex portion 24 a abuts on the trim body 10. ing.

  A front side portion of the lower portion of the back panel 20 is formed in a concave shape when viewed from the inside of the vehicle, thereby providing a pocket recess 25 continuous with the door pocket 12.

  The upper part of the back panel 20 closes the opening 11 of the trim main body 10 and is provided as a decorative portion 26. A decorative skin 27 made of fabric or the like is attached to the entire surface of the decorative portion 26 facing the inside of the vehicle so as to overlap the film 23. In addition, the lower edge part of the rear side of the decoration part 26 protrudes in the vehicle, and is provided as an armrest 26a.

  An opening 28 is formed between the decorative portion 26 of the back panel 20 and the pocket recess 25, and the support portion 13 of the trim body 10 enters the opening 28.

  A large number of mounting rods 29 are integrally formed on the periphery of the back panel 20. Corresponding to these mounting rods 29, a boss portion (not shown) is projected on the back surface of the trim body 10, and the boss portion is inserted into the hole of the mounting rod 29 to perform heat caulking or the like. A panel 20 is assembled to the trim body 10.

The back panel 20 is obtained by cold-pressing the laminated sheet of the first layer 21, the second layer 22, and the film 23 that are foam-molded, and includes an energy absorbing portion 24 and a pocket concave portion 25 as shown in FIG. 1. The decorative portion 26, the opening 28, and the attachment rod 29 are integrally formed at the same time.
Thereafter, the decorative skin 27 is attached to the decorative portion 26.

  In the door trim configured as described above, when the vehicle collides sideways, the occupant's waist collides with the door. At this time, the energy absorbing portion 24 disposed between the trim main body 10 and the door panel 30 receives a compression load and buckles and absorbs impact energy. The energy absorbing portion 24 is porous and absorbs energy by buckling of the concavo-convex shape, and the glass fiber plays a role of holding the fragments generated by buckling of the energy absorbing portion 24, so that large impact energy can be absorbed efficiently. Moreover, it is not necessary to create a peak waveform of impact load. As a result, the occupant can be protected.

  External noise can be absorbed by the porous back panel 20. In particular, the sound absorption effect can be further enhanced by the second layer 22 having a high expansion ratio. The first layer 21 also plays a role of maintaining a predetermined strength.

  In addition, since the film 23 is attached to the inner surface of the back panel 20, it is possible to block the film 23 from transmitting external noise absorbed and attenuated by the back panel 20.

The present invention is not limited to the above embodiment, and various aspects can be adopted. For example, the trim body 10 is exposed in the vehicle, but may be covered with a skin. The film 23 of the back panel 20 may be omitted. The back panel may include a resinous solid layer over the entire area.
The pocket recess 25 and the decorative portion 26 of the back panel 20 may be omitted, or a part having other functions may be formed integrally with the back panel 20.
The first layer 21 and the second layer 22 of the back panel 21 may be disposed in reverse.
The trim body and the back panel may be connected by means such as hot melt.

It is a disassembled perspective view of the vehicle door trim which makes one Embodiment of this invention. It is a longitudinal cross-sectional view which expands and shows the energy absorption part in the back panel of the door trim.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Trim main body 20 Back panel 21 1st layer 22 2nd layer 23 Film 24 Energy absorption part 25 Recess 26 for pockets Decoration part 27 Skin for decoration

Claims (4)

  Constructed by connecting the trim body inside the car and the back panel outside the car, this back panel has a porous layer containing fibers, and at least part of the back panel has an uneven shape to absorb energy Door trim characterized by being provided as a part.   The door trim according to claim 1, wherein the back panel is composed of only a porous layer, and a film is attached to the inner surface of the vehicle.   The door trim according to claim 1 or 2, wherein the trim main body has a door pocket, and the back panel integrally has a pocket concave portion continuous with the door pocket.   The trim body has an opening, and the back panel integrally has a decorative portion that closes the opening, and a decorative skin is attached to the inner surface of the decorative portion. The door trim in any one of Claims 1-3.

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