JP2007237901A - Side door structure of automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a side door structure of an automobile devised to efficiently absorb collision energy in lateral collision of the automobile without causing drastic mass increase and cost increase. <P>SOLUTION: This side door structure of the automobile is constituted by installing an energy absorbing member 6 on a back surface of a door trim 3 and mounting an impact beam 7 at a position opposed to the energy absorbing member 6 on a back surface of a door outer panel 1 through a bracket 10, the bracket 10 is formed in a trough shape with a groove part 11 directed to the outside in the vehicle width direction by extending it along the impact beam 7, flange parts 12 formed on its both side parts are installed on the back surface of the door outer panel 1 and constituted to support the impact beam 7 on a back surface of the groove 11 and another energy absorbing member 14 is installed on the back surface of the groove part 11 of the bracket 10 to cover the impact beam 7. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a side door structure of an automobile.

  In recent years, from the viewpoint of strengthening the protection of passengers against side collisions (side collisions) of automobiles, impact beams and collision energy for increasing rigidity against side collisions are absorbed inside the side doors. The structure which arrange | positions the energy absorption member for doing has come to be employ | adopted.

  FIG. 3 shows an example of a conventional side door structure. In the figure, 1 is a door outer panel, 2 is a door inner panel, 3 is a door trim, 4 is a door glass, and the waist of the occupant 5 on the back of the door trim 3 is shown. An energy absorbing member 6 is attached at a position corresponding to the height via an adhesive (see FIG. 4), and an impact beam 7 is provided at a position facing the energy absorbing member 6 on the back surface of the door outer panel 1. Is mounted via a bracket 8.

As prior art document information related to the side door structure of this type of automobile, there are Patent Document 1 and Patent Document 2 below.
JP-A-8-67140 JP 2005-138838 A

  However, in such a conventional side door structure of an automobile, since the rigidity of the door inner panel 2 that the energy absorbing member 6 first hits at the time of a collision is low, the energy absorbing member 6 hits the impact beam 7 having high rigidity and starts to be substantially crushed. However, since the impact beam 7 is supported by the bracket 8 having the same size, the support structure is weak even if the impact beam 7 itself has sufficient rigidity. There is a possibility that the collision energy from the impact beam 7 may not be efficiently absorbed by the energy absorbing member 6 depending on the deformation of the support structure of the impact beam 7.

  For this reason, measures have been proposed to reinforce the door inner panel 2 so that the energy absorbing member 6 starts to collapse immediately after the energy absorbing member 6 hits the door inner panel 2. Increasing the rigidity of the parts by increasing the thickness of the parts results in a significant increase in mass and cost. In particular, the cover 9 that covers the service hole 2a is installed at the position where the energy absorbing member 6 of the door inner panel 2 hits. In such a case, there has been a problem that the cost required for reinforcement rises because the structure tends to decrease in rigidity.

  The present invention has been made in view of the above-described circumstances, and provides a side door structure for an automobile capable of efficiently absorbing collision energy at the time of a side collision of the automobile without causing a significant increase in mass or cost. For the purpose.

  The present invention provides an automobile side door structure in which an energy absorbing member is mounted on the back surface of a door trim and an impact beam is attached to a position facing the energy absorbing member on the back surface of the door outer panel via a bracket. Extending along the impact beam to form a trough shape with the groove portion facing outward in the vehicle width direction, and flange portions formed on both sides thereof are attached to the back surface of the door outer panel and the back surface of the groove portion is An impact beam can be supported, and another energy absorbing member is mounted on the back surface of the groove portion of the bracket so as to cover the impact beam.

  Thus, in this way, the impact beam is stably supported from the door outer panel side by both-end support by the bracket, and a strong box structure is formed by the door outer panel and the trough-shaped bracket. The impact beam support structure has been greatly improved in rigidity, so that the impact beam is firmly supported from the door outer panel side even in the event of a side collision, and the collision energy is reliably transmitted from the impact beam to each energy absorbing member for effective absorption. In addition to the energy absorbing member that can be placed only in a limited space between the door trim and the door inner panel, another energy absorbing member has been added on the impact beam side. However, the absorption capacity of the collision energy is increased.

  As a result, it is not necessary to reinforce the door inner panel more than necessary, and it is possible to efficiently absorb the collision energy at the time of a side collision of a car by simply installing a small component such as another energy absorbing member or bracket. Thus, it is possible to avoid a significant increase in mass and cost.

  In addition, by attaching a trough-shaped bracket to the back surface of the thin plate-like door outer panel to form a strong box structure, the side rigidity of the door outer panel is increased, so that a dent deformation or the like hardly occurs. An effect is also obtained.

  According to the automobile side door structure of the present invention described above, various excellent effects as described below can be obtained.

  (I) Even if the door inner panel is not reinforced more than necessary, it is possible to transfer collision energy from the impact beam to each energy absorbing member by simply installing a small component such as another energy absorbing member or bracket. Can be transmitted effectively and absorbed effectively, and the collision energy absorption capacity can be increased more than before, so the collision energy at the time of side collision of the car can be efficiently improved without causing a significant increase in mass and cost. Can be absorbed.

  (II) By attaching a trough-shaped bracket to the back surface of the thin plate-like door outer panel to form a strong box structure, it is possible to increase the surface rigidity of the door outer panel and to prevent dent deformation and the like from occurring.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 and FIG. 2 show an example of an embodiment for carrying out the present invention, and parts denoted by the same reference numerals as those in FIG. 3 and FIG.

  As shown in FIG. 1, in the present embodiment, a bracket 10 for attaching an impact beam 7 to the back surface of the door outer panel 1 extends along the impact beam 7 so that a groove 11 is formed on the outer side in the vehicle width direction (in FIG. The flange part 12 formed in the both sides is attached to the back surface of the door outer panel 1 via an adhesive or the like.

  In addition, a bead 13 is formed on the back surface of the groove portion 11 of the bracket 10 so that one side of the impact beam 7 is just fitted, and one side of the impact beam 7 is fitted to the bead 13. It is welded in the state.

  Further, another energy absorbing member 14 is mounted on the back surface of the groove portion 11 of the bracket 10 so as to cover the impact beam 7. In the example shown here, the resin energy absorbing member 14 is attached to the rear surface of the groove portion 11. It can be fastened to a bolt 17 provided on the back surface of the groove portion 11 of the bracket 10 with a nut 15 via a mounting bracket 16.

  At this time, the fastening of the mounting bracket 16 and the bracket 10 is preferably performed at a vertical position sandwiching the impact beam 7, and the energy absorbing member 6 on the door trim 3 side and the impact beam 7 side are arranged. As shown in FIG. 2, the energy absorbing member 14 is preferably arranged so that both the energy absorbing members 6 and 14 overlap as much as possible in a side view.

  Thus, if the side door structure of the automobile is configured in this way, the impact beam 7 is supported stably from the side of the door outer panel 1 by both-end support by the bracket 10, and the door outer panel 1 and the trough-shaped bracket 10 are supported. Thus, the rigidity of the support structure of the impact beam 7 is greatly improved and the impact beam 7 is firmly supported from the side of the door outer panel 1 even in a side collision, and the impact energy is applied to the impact beam 7. In addition to the energy absorbing member 6 that can be reliably transmitted to each energy absorbing member 14 and effectively absorbed, and can be disposed only in a limited space between the door trim and the door inner panel, impact Since another energy absorbing member 14 is also installed on the beam 7 side, So that the absorption capacity of the collision energy is increased.

  As a result, it is not necessary to reinforce the door inner panel more than necessary, and it is possible to efficiently absorb the collision energy at the time of a side collision of the automobile only by newly installing a small component such as another energy absorbing member 14 or bracket 10. Therefore, a large increase in mass and cost increase can be avoided.

  In addition, by attaching the trough-shaped bracket 10 to the back surface of the thin plate-like door outer panel 1 to form a strong box structure, the surface rigidity of the door outer panel 1 is increased, so that it is difficult for deformation to occur. The following effects can also be obtained.

  Therefore, according to the above embodiment, even if the door inner panel is not reinforced more than necessary, it is possible to reduce the collision energy at the time of a side collision of the automobile only by newly installing a small component such as another energy absorbing member 14 or the bracket 10. Since the impact beam 7 can be reliably transmitted to each energy absorbing member 14 for effective absorption and the collision energy absorption capacity can be increased as compared with the prior art, the vehicle can be used without causing a significant increase in mass or cost. It is possible to efficiently absorb the collision energy at the time of the side collision, and it is possible to increase the surface rigidity of the door outer panel 1 and to prevent the dent deformation or the like from occurring.

  In addition, the side door structure of the automobile of the present invention is not limited to the above-described embodiments, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

It is sectional drawing which shows an example of the form which implements this invention. It is an arrow view of the II-II direction of FIG. It is sectional drawing which shows a prior art example. FIG. 4 is an arrow view in the IV-IV direction of FIG. 3.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Door outer panel 2 Door inner panel 3 Door trim 6 Energy absorption member 7 Impact beam 10 Bracket 11 Groove part 12 Flange part 14 Energy absorption member

Claims (1)

  A side door structure for an automobile in which an energy absorbing member is mounted on the back surface of a door trim and an impact beam is attached to a position facing the energy absorbing member on the back surface of the door outer panel via a bracket, the bracket being the impact beam The groove portion is formed in a trough shape with the groove portion facing outward in the vehicle width direction, and flange portions formed on both sides thereof are attached to the back surface of the door outer panel to support the impact beam on the back surface of the groove portion. A side door structure for an automobile, characterized in that another energy absorbing member is mounted on the back surface of the groove portion of the bracket so as to cover the impact beam.

Images