JP5200917B2 - Automotive door - Google Patents

Description

  The present invention relates to an automobile door capable of improving occupant protection performance.

In order to improve the occupant protection performance against a collision, for example, as described in Patent Document 1 below, an impact-responsive pad may be provided inside the door of the automobile. For example, when the door outer panel is deformed to the inside of the vehicle body due to a load input from the outside of the vehicle during a side collision, the impact corresponding pad quickly pushes the occupant's waist or the like toward the inside of the vehicle, thereby It has a function of delaying the time until a hard member such as an outer panel hits an occupant. The impact response pad disclosed in Patent Document 1 has a resin-made grid-like rib having a constant cross section in the width direction of the vehicle body.
JP 2008-174174 A

  The impact corresponding pad made of grid-like ribs disclosed in Patent Document 1 has a rapid rise in load, but if the breakage load of the grid-like ribs is exceeded, the breakage proceeds at a stretch. Therefore, if the stroke exceeds a certain level, the load There has been a problem that the drop in the thickness tends to increase and the characteristics tend to become unstable.

  Accordingly, it is an object of the present invention to provide an automobile door having an impact corresponding pad that has a rapid rise in load when a collision load is input to the door and has stable load characteristics.

  The present invention is an automobile door provided with an impact corresponding pad disposed between an outer panel of the door and a door trim member on the inside of the vehicle, the impact corresponding pad being a base member fixed inside the door; A plate-shaped resin rib having a base end fixed to the base member, a tip end side extending from the base member in the width direction of the vehicle body, and a rigidity changing portion that gradually decreases in rigidity from the base end toward the tip end. A plurality of ribs arranged on the base member.

Before SL rib group, it is composed of the first resin ribs forming a first angle with respect to the longitudinal direction of the vehicle body, by a second resin ribs forming a second angle with respect to the first resin rib Yes. An outer rib group including the first resin rib and the second resin rib is provided on the side of the base member facing the outer panel, and the first rib is disposed on the side of the base member facing the door trim member. inner rib group is provided with a resin rib and the second resin rib.

  An example of the rigidity changing portion of the resin rib is formed between a plurality of step portions whose width decreases stepwise from the base end to the tip end of the resin rib. The length of the step portion of each resin rib constituting the outer rib group may be different from the length of the step portion of each resin rib constituting the inner rib group. Furthermore, the thickness of the step portion of the resin rib may gradually decrease from the base end to the tip end of the resin rib.

  According to the automobile door of the present invention, when a collision load is input to the door and the outer panel is deformed toward the inside of the vehicle, the resin ribs constituting the rib group are sequentially bent from the front end side according to the load. Since a large number of such resin ribs are arranged on the base member, a phase difference can be given to the folding timing, so that the load rises quickly and the folding mode can be controlled. Moreover, this impact-compatible pad can reduce the drop in load even when the stroke increases, and exhibits stable load characteristics regardless of the collision mode (for example, collision from the side of the vehicle body or collision from an oblique direction). Can do. For this reason, in the unlikely event of a collision, the occupant's waist can be pushed toward the inside of the vehicle body in a desired state.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 shows an example of an automobile door 10. As shown in FIG. 2, the door 10 includes a metal outer panel 11, a metal inner panel 12, a resin door trim member 13, a liftable door glass 14 (shown in FIG. 1), and the like. . Inside the door 10, an elevating mechanism (window regulator) 15 and a side impact bar 16 for driving the door glass 14 in the vertical direction are arranged. A hinge member 17 is provided at the front end of the door 10.

  An arrow X in FIG. 1 indicates the longitudinal direction of the vehicle body, and an arrow Y indicates the vertical direction. An arrow Z in FIG. 2 is the width direction of the vehicle body. The outer panel 11 constitutes a wall surface on the vehicle exterior side of the door 10. The door trim member 13 forms a wall surface on the vehicle interior side of the door 10.

  An impact corresponding pad 20 is provided inside the door 10. The impact corresponding pad 20 is provided at a position near the rear portion of the lower portion of the door 10, that is, at a position corresponding to a waist portion of an occupant seated on a seat (not shown) disposed beside the door 10. The impact-compatible pad 20 is positioned between the outer panel 11 and the door trim member 13 on the inner side of the side impact bar 16 so as to have a substantially vertical posture (a part of which is shown in FIG. 2). Is attached to the inner panel 12.

  The impact corresponding pad 20 has a base member 30 fixed inside the door 10. An outer rib group 31 is provided on the side of the base member 30 facing the outer panel 11. An inner rib group 32 is provided on the side of the base member 30 facing the door trim member 13.

  FIG. 3 shows the outer rib group 31. FIG. 4 shows the outer rib group 31 and the inner rib group 32. The outer rib group 31 is a plate-shaped first resin rib disposed so as to form a first angle θ1 (for example, 90 °) with respect to a line segment X ′ (shown in FIG. 3) along the longitudinal direction X of the vehicle body. 41 and a second resin rib 42 disposed so as to form a second angle θ2 (for example, 90 °) with respect to the first resin rib 41.

  In the case of the present embodiment, the first resin rib (vertical rib) 41 and the second resin rib (horizontal rib) 42 are independent from each other so as to form a right angle (90 °) relationship. It is fixed to the base member 30. As shown in FIG. 5, the base ends 41 a and 42 a of the resin ribs 41 and 42 are respectively fixed to the base member 30. The ends 41b and 42b of the resin ribs 41 and 42 extend in the vehicle width direction Z toward the outside of the vehicle body.

  The resin ribs 41 and 42 are formed integrally with the base member 30. However, the resin ribs 41 and 42 may be manufactured separately from the base member 30 and fixed to the base member 30 by fixing means such as adhesion or insertion. The material of the base member 30 and the resin ribs 41 and 42 is, for example, a synthetic resin such as polypropylene or hard polyethylene, and may be composed of only a resin, or a material having a strength adjusting member such as glass fiber in the resin. It may be used.

  The shapes of the first resin rib 41 and the second resin rib 42 are common to each other. The resin ribs 41 and 42 have a stepwise (discontinuous) reduction in rigidity from the base ends 41a and 42a toward the tips 41b and 42b, respectively, as representatively shown in FIGS. Thus, it has the 1st step part 45 with the largest width | variety, the 2nd step part 46 with a medium width | variety, and the 3rd step part 47 with the smallest width | variety. However, the number of stepped portions may be four or more, in short, it may be plural.

  The first step portion 45 has a length L1 and a width W1. The second step portion 46 has a length L2 and a width W2. The third step portion 47 has a length L3 and a width W3. That is, these resin ribs 41, 42 include a plurality of step portions 45, 46, 47 whose width decreases from W1 to W2, W3 stepwise from the base ends 41a, 42a to the tips 41b, 42b. . Between the first step portion 45 and the second step portion 46, a stiffness changing portion 51 in which the stiffness changes suddenly is formed. Further, between the second step portion 46 and the third step portion 47, there is formed a rigidity changing portion 52 that changes suddenly so that the rigidity is further reduced.

  On the other hand, the inner rib group 32 forms a first angle (for example, 90 °) with respect to a line segment X ′ (shown in FIG. 3) along the longitudinal direction X of the vehicle body, like the outer rib group 31 described above. The plate-shaped first resin rib 61 and the second resin rib 62 arranged so as to form a second angle (for example, 90 °) with respect to the first resin rib 61. Yes.

  In the case of this embodiment, the first resin rib (vertical rib) 61 and the second resin rib (horizontal rib) 62 are independent from each other so as to form a right angle (90 degrees) relationship. It is fixed to the base member 30. As shown in FIG. 5, the base ends 61 a and 62 a of the resin ribs 61 and 62 are fixed to the base member 30, respectively. The front ends 61b and 62b of the resin ribs 61 and 62 extend in the width direction Z of the vehicle body toward the inside of the vehicle body.

  The material of the resin ribs 61 and 62 is, for example, a synthetic resin such as polypropylene or hard polyethylene, similar to the resin ribs 41 and 42. These resin ribs 61 and 62 may be made of only resin, or a material having a strength adjusting member such as glass fiber in the resin may be used.

  The shapes of the first resin rib 61 and the second resin rib 62 are common to each other. These resin ribs 61 and 62 have a stepwise (discontinuous) reduction in rigidity from the base ends 61a and 62a toward the tips 61b and 62b, respectively, as representatively shown in FIGS. As described above, the first step portion 65 having the largest width, the second step portion 66 having the medium width, and the third step portion 67 having the smallest width. However, the number of stepped portions may be four or more, in short, it may be plural.

  The first step portion 65 has a length L4 and a width W4. The second step portion 66 has a length L5 and a width W5. The third step portion 67 has a length L6 and a width W6. That is, these resin ribs 61 and 62 include a plurality of step portions 65, 66, and 67 whose width decreases from W4 to W5 and W6 stepwise from the base ends 61a and 62a toward the tips 61b and 62b. . Between the first step portion 65 and the second step portion 66, a stiffness changing portion 71 whose stiffness changes suddenly is formed. Further, between the second step portion 66 and the third step portion 67, a stiffness changing portion 72 that is suddenly changed so that the stiffness is further reduced is formed.

  The lengths of the step portions 45, 46, 47 of the resin ribs 41, 42 of the outer rib group 31 and the lengths of the step portions 65, 66, 67 of the resin ribs 61, 62 of the inner rib group 32 are different from each other. That is, the length L1 of the first step portion 45 of the resin ribs 41 and 42 facing the outside of the vehicle body is different from the length L4 of the first step portion 65 of the resin ribs 61 and 62 facing the inside of the vehicle body (L1 ≠ L4).

  Further, the total length of the first step portion 45 and the second step portion 46 of the resin ribs 41 and 42 and the total length of the first step portion 65 and the second step portion 66 of the resin ribs 61 and 62 are also different from each other ( L1 + L2 ≠ L4 + L5). Furthermore, the total length of the step portions 45, 46, 47 of the resin ribs 41, 42 and the total length of the step portions 65, 66, 67 of the resin ribs 61, 62 are different from each other (L1 + L2 + L3 ≠ L4 + L5 + L6). The widths W1, W2, W3 of the step portions 45, 46, 47 of one resin rib 41, 42 and the width W4 of the step portions 65, 66, 67 of the inner rib group 32 of the other resin rib 61, 62 are provided. W6 and W7 may be different from each other.

  When the door 10 receives a collision from the side and the outer panel 11 is deformed to the inside of the vehicle, the resin ribs 41, 42, 61, 62 are sequentially bent from the front end side. For example, while the stroke immediately after the collision is small, one of the third step portions 47 and 67 breaks and then the other breaks. When the stroke increases, one of the second step portions 46 and 66 breaks, and then the other breaks. When the stroke is further increased, one of the first step portions 45 and 65 is broken and then the other is folded.

  As described above, since the large number of resin ribs 41, 42, 61, 62 are sequentially bent from the tip side at the rigidity changing portions 51, 52, 71, 72, etc., the number of times the resin ribs 41, 42, 61, 62 are bent is increased as the load is increased. ), A stable load characteristic can be obtained against an increase in stroke, and a large energy absorption effect can be obtained.

  For this reason, the door 10 having the impact corresponding pad 20 of the present embodiment is configured so that the occupant's waist is supported via the impact corresponding pad 20 when the outer panel 11 is deformed toward the inner side of the vehicle body due to a collision load input from the side of the vehicle body. It can be moved quickly to the inside of the vehicle body, and the time until the outer panel 11 and hard obstacles entering from the outside of the vehicle body reach the occupant's body can be delayed.

  Further, in the impact corresponding pad 20 of the present embodiment, all the resin ribs 41, 42, 61, 62 protrude in a direction perpendicular to the base member 30, and the tips 41 b of the resin ribs 41, 42, 61, 62 are provided. Since the width is reduced stepwise toward 42b, 61b, and 62b, the mold can be easily removed when integrally molded with resin.

  FIG. 7 shows an impact-compatible pad 20A according to the second embodiment of the present invention. In the impact corresponding pad 20A, the plate thicknesses T1, T2, T3 of the step portions 45, 46, 47 of the resin ribs 41, 42 constituting the outer rib group 31 are changed from the base ends 41a, 42a to the tips 41b, 42b. It is getting smaller gradually. Further, the plate thicknesses T4, T5, and T6 of the step portions 65, 66, and 67 of the resin ribs 61 and 62 constituting the inner rib group 32 are gradually reduced from the base ends 61a and 62a toward the distal ends 61b and 62b. ing. Other than that, it is common with the shock corresponding pad 20 of the first embodiment. In this second embodiment as well, a large number of resin ribs 41, 42, 61, 62 are sequentially bent from the front end side in the rigidity changing portions 51, 52, 71, 72, etc., and thus stable against an increase in stroke. Load characteristics can be obtained.

  FIG. 8 shows an impact-compatible pad 20B according to the third embodiment of the present invention. The impact-compatible pad 20B is formed by forming slits 80 or notches (V-grooves) functioning as rigidity changing portions in the plate-like resin ribs 41, 42, 61, 62, thereby providing base ends 41a, 42a, 61a, 62a. A stiffness changing portion is provided in which the stiffness changes stepwise (discontinuously) from the tip toward the tip 41b, 42b, 61b, 62b. Also in this case, the resin ribs 41, 42, 61, 62 can be sequentially bent from the distal end toward the proximal end due to the load at the time of collision.

  In carrying out the present invention, it goes without saying that the structure and arrangement of the constituent elements of the invention including the outer panel, the inner panel, the door trim member, and the resin rib can be changed as appropriate. For example, in the above-described embodiment, the rib group is provided on both the outer side and the inner side of the base member. However, the rib group may be provided only on one side of the base member. Moreover, the impact corresponding pad of the present invention may be formed integrally with the door trim member on the inner surface of the door trim member, or may be formed integrally with a module panel for mounting a window regulator.

The side view of the door provided with the impact corresponding pad which concerns on the 1st Embodiment of this invention. The longitudinal cross-sectional view of a part of door along the F2-F2 line in FIG. The side view which looked at the impact corresponding pad of the door shown by FIG. 1 from the side direction of the vehicle body. The top view which looked at the impact corresponding | compatible pad shown by FIG. 3 from upper direction. The front view which expands and shows a part of said impact corresponding pad. The perspective view which expands and shows a part of said impact corresponding pad. The front view of a part of impact corresponding pad concerning a 2nd embodiment of the present invention. The front view of a part of impact corresponding pad concerning a 3rd embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Door 11 ... Outer panel 12 ... Inner panel 13 ... Door trim member 20 ... Impact response pad 30 ... Base member 31 ... Outer rib group 32 ... Inner rib group 41, 42 ... Resin rib 45, 46, 47 ... Step part 51, 52 ... Rigidity changing part 61, 62 ... Resin rib 65, 66, 67 ... Step part 71, 72 ... Rigidity changing part

Claims (5)

An automotive door provided with an impact-resistant pad disposed between an outer panel of a door and a door trim member inside the vehicle,
The impact corresponding pad is:
A base member fixed inside the door;
A plate-shaped first and a fixed plate having a base end fixed to the base member, a tip end side extending from the base member in the width direction of the vehicle body, and a rigidity changing portion that gradually decreases in rigidity from the base end toward the tip. A rib group formed by arranging a plurality of second resin ribs on the base member ;
The rib group is
The base member is provided on the side facing the outer panel, and forms a second angle with respect to the first resin rib on the outer side and the first resin rib that forms a first angle with respect to the longitudinal direction of the vehicle body. An outer rib group constituted by the second resin rib on the outer side;
Provided on the side of the base member that faces the door trim member and has a second angle with respect to the first resin rib on the inner side and the first resin rib that forms a first angle with respect to the longitudinal direction of the vehicle body. An automobile door comprising an inner rib group formed by the inner second resin rib . Rigidity changing portion of the resin rib, for vehicle according to claim 1, characterized in that the width toward the distal end from the base end of the resin rib is formed between the smaller plurality of stepped portions stepwise door. The length of the plurality of step portions of each resin rib constituting the outer rib group is different from the length of the plurality of step portions of each resin rib constituting the inner rib group. Item 3. The automobile door according to Item 2 . Each resin rib constituting the outer rib group has at least a first step portion having the largest width, a second step portion having a medium width, and a third step portion having the smallest width,
Each of the resin ribs constituting the inner rib group has at least a first step portion having the largest width, a second step portion having a medium width, and a third step portion having the smallest width.
The total length of the first step portion and the second step portion of the resin ribs constituting the outer rib group, and the first step portion and the second step of the resin ribs constituting the inner rib group. The automobile door according to claim 3, wherein the total lengths of the parts are different from each other. Wherein the stepped portion of the resin rib, automotive door according to claim 2 or 4, wherein the thickness toward the tip end from the base end of the resin ribs are gradually reduced.

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