JP2011230603A - Interior component for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an interior component for an automobile capable of coping with a large shock by having a high repulsion while maintaining energy absorption characteristics for achieving a safety of an occupant in a collision.SOLUTION: An interior component for an automobile is constituted by attaching a shock absorbing member 20 to a door trim 11 of a vehicle. The shock absorbing member 20 includes: a box body 24 having an upper surface 21, peripheral walls 22 extending downward from the periphery of the upper surface 21, and an opened surface; and a pillar-shaped part 25 extending from the upper surface 21 to an opening 23 side in the box body 24. A surrounding wall 32 is provided on the door trim 11 so as to surround the periphery of the tip portion of the pillar-shaped part 25.

Description

  The present invention relates to an automobile interior part that protects an occupant by absorbing impact energy at the time of a side collision of the automobile.

  Various safety devices are provided in the passenger compartment of the vehicle in order to protect the passenger from the impact of a collision. An interior member is mounted in the passenger compartment to ensure comfort as a living room, and a safety device is generally disposed between the interior member and the vehicle body panel.

  Patent Document 1 describes a vehicle interior part provided with an impact absorbing member that absorbs energy and deforms when receiving an impact from the side of the vehicle and relaxes the impact received by the occupant to ensure safety. Has been. The impact absorbing member is disposed between the vehicle door trim and the vehicle body panel, and absorbs energy applied to the occupant's waist and shoulders by being crushed in response to the impact.

  FIG. 8 is a schematic view showing an automobile door trim 51 (hereinafter referred to as “door trim 51”) provided with the impact absorbing member 60 described in Patent Document 1. As shown in FIG. In the figure, a door trim 51 bulges out indoors and is attached to the inner surface of the vehicle body panel 52 on the passenger compartment side. On the other hand, the shock absorbing member 60 is fixedly disposed inside the door trim 51 facing the vehicle body panel 52. The arrangement position is the lower part of the door trim 51 and is a position corresponding to the waist of the occupant sitting on the seat.

  FIG. 9 is a perspective view schematically showing the shock absorbing member 60. The shock absorbing member 60 is a box having an open lower surface 61 in the figure, and is formed by injection molding using an elastomer material in which polypropylene (PP) resin having shock absorbing performance is blended with ethylene propylene rubber (EPR). Yes. Corner cut portions 63 are formed at the four corners of the upper surface 62 of the box.

  The shock absorbing member 60 is disposed with the upper surface 62 fixed to the door trim 51, and is deformed by the load applied by the shock from the direction of the lower surface 61 to absorb the shock. At this time, when the load exceeds a predetermined value, the ridgeline portion 65 to which the side surface 64 is connected is split from the corner cut portion 63 as a starting point, so that the load is absorbed and the energy of impact can be reduced.

JP 2004-338627 A

  However, since the conventional shock absorbing member is a simple box, there is a problem that the amount of energy to be absorbed is limited. That is, in order to absorb a large amount of energy, it is necessary to have a high reaction force. However, if such a design is used, the size of the box increases and it cannot be accommodated between the vehicle interior member and the vehicle body panel. Further, when the strength of the material is increased to give a reaction force, the impact may not be mitigated and a large impact energy may be transmitted to the occupant.

  In addition, when subjected to an impact, the box may not be crushed vertically but may be deformed in a side-by-side state, and the energy of the impact may not be sufficiently absorbed.

  Therefore, in view of the above problems, the present invention provides an automotive interior part that has a high repulsive force and can cope with a large impact while maintaining an energy absorption characteristic for occupant safety in the event of a collision. It is aimed.

  In order to solve the above problems, an automotive interior component according to the present invention is an automotive interior component in which an impact absorbing member is attached to a side wall panel of a vehicle, and the impact absorbing member includes an upper surface portion and the upper surface portion. A box having a peripheral wall part hanging from the outer periphery of the box and having one surface opened, a columnar part extending from the upper surface part toward the open part inside the box, and an outer periphery of a tip part of the columnar part on the side wall panel And an enclosure wall portion disposed around the enclosure.

  According to this configuration, the columnar portion provided inside the box can increase the reaction force during deformation and can cope with a large impact. In addition, since the tip of the columnar part is placed surrounded by the surrounding wall part provided on the side wall panel, the columnar part is supported by the surrounding wall part and falls down when receiving an impact. And the box and the columnar portion are each crushed vertically to sufficiently absorb the energy of impact.

  Furthermore, in the automobile impact absorbing device according to the present invention, a hook portion having a locking claw at a front end portion is inserted between the side wall panel and the shock absorbing member, and the locking claw is on the back side. And a locking portion having an engaging hole to be locked by the locking means, and the side wall panel and the shock absorbing member are fixed by the locking means. According to this, when the locking hook in the locking means is inserted into the engagement hole of the locking portion and the locking claw of the locking hook is engaged with the back surface of the locking portion, the impact absorbing member is attached to the side wall panel. Easy to install.

  ADVANTAGE OF THE INVENTION According to this invention, the impact-absorbing device for motor vehicles which can respond to a big impact with a high repulsive force can be provided, maintaining the energy absorption characteristic which makes a passenger | crew safe at the time of a collision.

It is a perspective view which shows one Embodiment of the door trim for motor vehicles to which this invention is applied. It is a principal part enlarged view of the interior component for motor vehicles shown in the state which attached the impact-absorbing member to the door trim same as the above. It is an AA line expanded sectional view of FIG. It is an expansion disassembled perspective view of the latching means in the interior component for motor vehicles same as the above. It is a perspective view of the interior parts for automobiles, (a) is a figure shown in the state before attaching an impact-absorbing member to a door trim, (b) is a figure shown in the state where an impact-absorbing member was attached to a door trim. It is a figure explaining the state at the time of the collision of automotive interior components same as the above. It is a figure which compares the energy absorption characteristic of the interior component for motor vehicles same as the above with the energy absorption property of the conventional interior component for motor vehicles. It is a perspective view which shows the conventional door trim for motor vehicles. It is a perspective view which shows the conventional impact-absorbing member.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the drawings.

  1 to 3 show a door trim 11 as an automotive interior part to which the present invention is applied. FIG. 1 is a perspective view of the door trim 11. FIG. 2 is an enlarged plan view of the main part of the door trim as seen from the outside of the passenger compartment. 3 is an enlarged cross-sectional view taken along line AA of FIG.

  In the figure, a door trim 11 swells indoors and is mounted on the inner surface of the vehicle body panel 12 facing the passenger compartment, and corresponds to a side wall panel in the present invention. An impact absorbing member 20 is disposed between the door trim 11 and the vehicle body panel 12 so as to be fixed inside the door trim 11 as shown in FIGS. The arrangement position is the lower part of the door trim 11 and is a position corresponding to the waist of the passenger sitting on the seat.

  The shock absorbing member 20 has an upper surface portion 21 having a substantially square shape in plan view and four peripheral wall portions 22 that respectively hang down from the outer periphery of the four sides of the upper surface portion 21, and an open portion on one surface disposed toward the door trim 11. A hollow box 24 provided with an opening 23 (hereinafter referred to as an “opening part 23”), and the opening part 23 inside the box 24 from the central part of the upper surface part 21 toward the opening part 23 side. A hollow cylindrical columnar portion 25 is formed integrally with the box 24 so as to extend to the inside.

  The impact absorbing member 20 is formed by injection molding using an elastomer material having an impact absorbing performance, for example, a polypropylene (PP) resin blended with ethylene propylene rubber (EPR), but is not limited thereto. .

  As shown in FIG. 3, the space between the inner surface of the peripheral wall portion 22 of the box body 24 and the outer peripheral surface of the columnar portion 25 is opened from the upper surface portion 21 to facilitate release from the mold after completion of molding. It is formed in a tapered shape that expands toward the portion 23. A hole 26 is formed in the bottom surface of the columnar portion 25.

  Further, corner cut portions 27 are formed at the four corners of the upper surface portion 21 of the box body 24, and the three outer peripheral portions of the opening portion 23 are engaged with the opening portion 23 from the box body 24 and extend substantially horizontally. A portion 28 is formed. As shown in FIG. 4, the engaging portion 28 is provided with an engaging hole 29 penetrating in the vertical direction.

  On the outer surface of the door trim 11 to which the shock absorbing member 20 is attached facing the outside of the passenger compartment, a hook portion 31 having a locking claw 30 at the tip corresponds to the engagement hole 29 of the locking portion 28. In addition to the three provided, an annular surrounding wall portion 32 is provided corresponding to the columnar portion 25 and is erected in a rib shape.

  The hook portion 31 of the door trim 11 constitutes a locking means 33 for fixing the shock absorbing member 20 to the door trim 11 together with the locking portion 28 of the shock absorbing member 20. FIG. 4 is an enlarged exploded perspective view of the locking means showing the configuration of the locking means 33 in a state before the locking portion 28 and the hook portion 31 are engaged. Then, as shown in FIGS. 4 and 5A, the locking means 33 associates the engagement holes 29 of the locking portions 28 with the hook portions 31 so that the shock absorbing member 20 is attached to the door trim 11. When pushed, the hook portion 31 is inserted into the engagement hole 29 while being elastically deformed, and when the locking claw 30 finishes penetrating, the locking claw 30 engages with the back side of the locking portion 29. The impact absorbing member 20 can be fixed to the door trim 11 by this engagement.

  On the other hand, when the shock absorbing member 20 is fixed to the door trim 11, the front end portion of the columnar portion 25 of the shock absorbing member 20 is inserted into the enclosure wall portion 32 of the door trim 11, and the columnar portion 25 The outer periphery of the distal end portion is wrapped so as to be supported and supported from the outside. In addition, although the surrounding wall part 32 in a present Example has shown the structure currently formed in cyclic | annular form, if it is the structure which wraps the outer periphery of the front-end | tip part of the columnar part 25 and is supported from the outside, it will be as one ring. It may be formed in a connected state or may be formed partially apart.

  As described above, the impact absorbing member 20 attached to the door trim 11 through the engagement of the locking means 33 is disposed between the vehicle body panel 12. Then, when an impact is applied from the side, for example, in the direction of the arrow in FIG. 6, the upper surface portion 21 and the vehicle body panel 12 come into contact with each other. Bends and absorbs energy. At this time, since the columnar member 25 and the surrounding wall portion 32 are provided, the reaction force becomes larger than that of the conventional shock absorber.

  In addition, since the distal end portion of the columnar portion 25 of the impact absorbing member 20 is inserted into the surrounding wall portion 32 and the outer periphery of the distal end portion of the columnar portion 25 is supported and held from the outside, the columnar portion 25 is lateral. Without falling down, as shown in FIG. 6, the box body 24 and the columnar portion 25 are crushed vertically to sufficiently absorb impact energy.

  Further, the shock absorbing member 20 according to the present embodiment is provided with the two peripheral wall portions 22 and the corner cut portions 27 in which a part of the upper surface portion 21 is chamfered at the four corners of the upper surface portion 21. When a force equal to or greater than the load is applied, the ridge line portion 34 that is the connecting side of the peripheral wall portion 22 is torn, and has suitable energy absorption characteristics for ensuring the safety of the occupant.

  FIG. 7 is a diagram showing the energy absorption characteristics of the automobile interior part according to the present embodiment in comparison with the energy absorption characteristics of the conventional automobile interior part. In FIG. 7, the horizontal axis represents the penetration amount (mm), and the vertical axis represents the load (kN). The energy absorption characteristic indicated by the solid line in the figure is the energy absorption characteristic of the automobile interior part in the present embodiment (the present invention), and the energy characteristic indicated by the alternate long and short dash line is the conventional automobile interior having no columnar part and enclosure wall part. It shows the energy absorption characteristics of the parts.

  That is, in the energy absorption characteristic shown in FIG. 7, in the case of a conventional automobile interior part indicated by a one-dot chain line, the absorption load is gradually increased upon receiving an external impact. On the other hand, in the case of the present invention indicated by a solid line, the end of the columnar portion 25 of the shock absorbing member 20 is supported from the outside by the surrounding wall portion 32, so that the columnar portion 25 does not fall down sideways. Therefore, a large reaction force is generated from the stage where the intrusion amount is small in the range indicated by the range a in the figure, and a large absorption load is obtained over the entire range a. That is, in the case of the automotive interior part according to the present invention, it shows that it has a large reaction force, can obtain a suitable energy absorption characteristic for ensuring the safety of the occupant, and can cope with a larger impact. .

  As mentioned above, although this invention was demonstrated using embodiment, the interior component for motor vehicles based on this invention is not limited to the Example mentioned above, In the range of the paper of this invention described in the claim Various modifications and changes are possible.

  For example, the columnar portion 25 is not limited to a cylinder, and can be an arbitrary shape such as a polygon.

  Further, the locking means 33 is not limited to the locking structure constituted by the hook portion 31 having the locking claw 30 and the locking portion 28 having the engagement hole 29, and the shock absorbing member 20 is attached to the door trim 11. Any other locking structure can be used as long as it can be fixedly attached.

  Further, the shock absorbing member 20 is not limited to the structure attached to the door trim 11 and can be attached to the vehicle body panel 12 side.

DESCRIPTION OF SYMBOLS 11 Door trim 12 Car body panel 20 Shock absorbing member 21 Upper surface part 22 Perimeter wall part 23 Opening (opening part)
24 Box 25 Columnar part 28 Locking part 29 Engagement hole 30 Locking claw 31 Hook part 32 Enclosure wall part 33 Locking means

Claims (1)

It is an automotive interior part in which a shock absorbing member is attached to a side wall panel of a vehicle,
The shock absorbing member is
A box body having an upper surface portion and a peripheral wall portion depending from the outer periphery of the upper surface portion and having one surface opened;
A columnar portion extending from the upper surface portion toward the open portion inside the box,
An automotive interior component comprising: an enclosure wall portion disposed on the sidewall panel so as to surround an outer periphery of a front end portion of the columnar portion.

Images