Vehicle door structure

Abstract

To provide a vehicle door structure which enables improvement of rigidity of a lower part of a door.SOLUTION: A vehicle door structure 100 includes: an inner panel 11, 21; an outer panel 12, 22 disposed on the vehicle outer side of the inner panel 11, 21; and a reinforcement member 13, 23 installed between the inner panel 11, 21 and the outer panel 12, 22. The reinforcement member 13, 23 is provided extending continuously over a forward portion 11a, 21a, a lower portion 11b, 21b, and a rearward portion 11c, 21c of the inner panel 11, 21.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a vehicle door structure. [Background technology]

[0002] 2. Description of the Related Art Generally, a door mounted on an automobile is configured to include an inner panel, an outer panel, and a reinforcing member (see, for example, Patent Document 1).

[0003] The vehicle exterior member and vehicle back door described in Patent Document 1 include an outer edge outer panel (70) and an outer edge outer panel (72) as reinforcing members, as shown in Fig. 8. The outer edge outer panel (70) is made of an L-shaped member joined to the front side of the front edge and lower edge of the door inner panel (62). The outer edge outer panel (72) is made of an inverted L-shaped member joined to the rear side of the rear edge and lower edge of the door inner panel (62). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6252507 (Figure 8) Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the vehicle exterior member and vehicle back door described in Patent Document 1, the front outer edge outer panel (70) and the rear outer edge outer panel (72) are spaced apart from each other in the front-to-rear direction and are arranged in an interrupted state. Therefore, the rigidity of the lower part of the side door body (60) is weak, and there is room for improvement in order to ensure the rigidity of the lower part of the door.

[0006] Therefore, an object of the present invention is to provide a vehicle door structure that can improve the rigidity of the lower part of the door. [Means for solving the problem]

[0007] As a means for solving the above problem, the present invention provides a vehicle door structure comprising an inner panel, an outer panel arranged on the vehicle exterior side of the inner panel, and a reinforcing member installed between the inner panel and the outer panel, wherein the reinforcing member is provided continuously across the front, lower and rear of the inner panel. Effect of the Invention

[0008] The present invention can provide a vehicle door structure that can improve the rigidity of the lower part of the door. [Brief description of the drawings]

[0009] [Figure 1] 1 is a schematic side view showing a vehicle door structure according to an embodiment of the present invention, illustrating an installation state of an inner panel of a front door as viewed from the vehicle exterior side. FIG. [Diagram 2] 1 is a schematic side view showing an installation state of a window regulator of a front door as viewed from the vehicle exterior side, illustrating a vehicle door structure according to an embodiment of the present invention. FIG. [Diagram 3] FIG. 2 is an enlarged cross-sectional view taken along line III-III of FIG. [Figure 4] FIG. 4 is an enlarged cross-sectional view taken along the line IV-IV of FIG. [Diagram 5] FIG. 2 is an enlarged cross-sectional view of FIG. [Figure 6] FIG. 1 is a schematic side view showing a vehicle door structure according to an embodiment of the present invention, illustrating an installation state of an inner panel of a rear door as viewed from the vehicle exterior side. [Figure 7] FIG. 7 is an enlarged cross-sectional view taken along the line VII-VII of FIG. [Figure 8] FIG. 8 is an enlarged cross-sectional view taken along the line VIII-VIII in FIG. 6. [Figure 9] FIG. 9 is an enlarged cross-sectional view taken along the line IX-IX in FIG. [Figure 10] FIG. 7 is an enlarged view of part A in FIG. 6. [Figure 11] 7 is an enlarged perspective view of part A in FIG. 6 as seen from the rear surface side. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an example of a vehicle door structure 100 according to an embodiment of the present invention will be described with reference to Figs. In addition, the forward direction of the vehicle is referred to as "front", the backward direction as "rear", the vertically upward side as "up", the vertically downward side as "down", and the vehicle width direction as "left" and "right".

[0011] <Vehicles> The vehicle to which the vehicle door structure 100 of the present invention is applied is not particularly limited in its style, type, etc., as long as it is an automobile equipped with doors D (front door 1 and rear door 2) as shown in Figures 1, 2, and 6. For example, a door opening (not shown) is formed in the vehicle body so that the door D can be installed so as to be freely opened and closed.

[0012] <Vehicle door structure> The vehicle door structure 100 includes a door D having inner panels 11, 21, outer panels 12, 22, and reinforcing members 13, .

[0013] Doors 1, 2, and 6, the door D is not particularly limited in type as long as it includes inner panels 11, 21, outer panels 12, 22, and reinforcing members 13, 23. In other words, the door D may be a side door that opens and closes a door opening (not shown) of a vehicle body. In the following, as an example of the door D, a front door 1 and a rear door 2 that are hinged and open at the rear and are disposed on the sides of the vehicle body will be described.

[0014] <Front door> The front door 1 shown in Fig. 1 or 2 is a front side door disposed at the front side of the vehicle body side. The front door 1 includes an inner panel 11, an outer panel 12, a reinforcing member 13, a door beam 71, a skin stiffener 81, a skin upper stiffener 91, a door hinge 31, a window glass (not shown), a lining (not shown), a window regulator 41 (see Fig. 11), a door lock device 51 (see Fig. 2), and electrical equipment 61 such as a harness (see Fig. 11).

[0015] <Inner panel> As shown in FIG. 1, the inner panel 11 is a door body that constitutes the framework of the front door 1. The inner panel 11 is formed of a metal plate member such as a rolled steel plate. The inner panel 11 has a window opening 11e, a speaker installation hole 11f, and a sash portion 11g. A front end 71a and a rear end 71b of a door beam 71 are fixed to a front portion 11a and a rear portion 11c of the inner panel 11. The inner panel 11 has a window opening 11e in an upper portion 11d.

[0016] As shown in Fig. 2, the peripheral edge of the outer panel 12 (see Figs. 3 to 5) is fixed to the outer peripheral edge of the inner panel 11 in the vehicle width direction via a door beam 71, a skin stiffener 81, and a skin upper stiffener 91. The inner panel 11 is connected to a front pillar (not shown) by a pair of upper and lower door hinges 31, 31 attached to the front end side so as to be able to open and close freely. The rear end side of the inner panel 11 is held in a door closed state by a door lock device 51.

[0017] 2, the window opening 11e is a location where a window glass (not shown) is disposed. The window opening 11e is formed by the sash portion 11g of the inner panel 11, a skin sash stiffener 93 disposed so as to overlap the sash portion 11g, and a skin upper stiffener 91 provided on the lower outer edge of the window opening 11e. The sash portion 11g is a window frame that supports the outer periphery of the window glass (not shown).

[0018] The speaker installation hole 11f is a hole in which a speaker (not shown) is attached. For example, the speaker is attached to the speaker installation hole 11f via a vibration-proof seal material (not shown). The speaker installation hole 11f is formed in the front lower part of the inner panel 11. A bead 11j is formed on the outer periphery of the speaker installation hole 11f to reinforce the speaker installation hole 11f.

[0019] 1 or 2, the bead 11h is a reinforcing portion for reinforcing the location where the window regulator 41 is installed. The bead 11h is provided in the center of the inner panel 11 and extends in the vertical direction. The bead 11i is a reinforcing portion for reinforcing the location where the door lock device 51 is installed. The bead 11i is provided on the rear portion 11c of the inner panel 11 and extends in the vertical direction.

[0020] 2, the beads 11h, 11i, and 11j are formed as groove-like recesses or protruding bulges in a cross-sectional view in the inner panel 11. The beads 11h, 11i, and 11j serve to reinforce the installation surfaces of the window regulator 41, the door lock device 51, the speaker (not shown), etc., to make them less likely to bend.

[0021] <Outer panel> 1, 3 and 4, the outer panel 12 is made of a thin resin member disposed on the vehicle outer side of the inner panel 11. The outer panel 12 is detachably attached to the vehicle width direction outer side of the inner panel 11. Therefore, when the outer panel 12 is removed from the inner panel 11, the installation location of the window regulator 41, the installation location of the door lock device 51, etc. become visible, making it easy to install the window regulator 41, the door lock device 51, etc.

[0022] <Reinforcing material> As shown in Fig. 1, the reinforcing member 13 is made of a metal plate member installed between the inner panel 11 and the outer panel 12. The reinforcing member 13 is provided continuously from the front part 11a of the inner panel 11 through the lower part 11b to the rear part 11c. Therefore, the reinforcing member 13 is formed in an L-shape (or a U-shape) in side view. A door D equipped with such a reinforcing member 13 can increase the rigidity of the door lower part.

[0023] The reinforcing member 13 and the inner panel 11 form a front closed cross-sectional portion 14 (see FIG. 3), a lower closed cross-sectional portion 15 (see FIG. 4), and a rear closed cross-sectional portion 16 (see FIG. 5). Therefore, the reinforcing member 13, which is L-shaped (or U-shaped) in side view, is reinforced from the front portion 13a through the lower portion 13b to the rear portion 13c. The upper portion 13d of the reinforcing member 13 extends from the lower portion 13b to the front lower end portion (at least a part of the periphery) of the window opening 11e. The reinforcing member 13 is formed by joining together a front reinforcing member 13A extending in the up-down direction at the front portion 23s and a lower reinforcing member 13B extending in the front-to-rear direction at the lower portion 13b in a continuous, flush state.

[0024] In the embodiment, as shown in Figures 1 and 2, the reinforcing member 13 is formed so that the vertical length of the rear portion 13c is short and the overall shape is L-shaped, but the vertical length of the rear portion 13c may be long so that the overall shape is U-shaped.

[0025] As shown in Fig. 3, the front closed cross-sectional portion 14 is formed between the reinforcing member 13 and the front portion 11a of the inner panel 11. Therefore, the front portion 11a of the inner panel 11 has high rigidity. The front closed cross-sectional portion 14 has a closed cross section extending in the up-down direction and has a generally rectangular shape that is elongated in the left-right direction. The front closed cross-sectional portion 14 extends to the vicinity of the front end portion of the sash portion 11g.

[0026] As shown in Fig. 4, the lower closed cross-sectional portion 15 is formed between the reinforcing member 13 and the lower portion 11b of the inner panel 11. The lower closed cross-sectional portion 15 has a closed cross-section extending in the front-rear direction and has a generally rectangular shape that is elongated in the left-right direction. This gives the lower portion 11b of the inner panel 11 high rigidity. The reinforcing member 13 and the lower portion 11b of the inner panel 11 are connected by a slide clip SC.

[0027] As shown in Fig. 5, the rear closed cross-sectional portion 16 is formed between the reinforcing member 13 and the rear portion 11c of the inner panel 11. The rear closed cross-sectional portion 16 has a closed cross-section extending in the up-down direction and has a generally rectangular shape that is elongated in the left-right direction. Therefore, the rear portion 11c of the inner panel 11 has high rigidity. In this embodiment, the rear closed cross-sectional portion 16 has a shorter dimension in the up-down direction than the front closed cross-sectional portion 14.

[0028] <Door beam> As shown in FIG. 1, the door beam 71 is a door reinforcing member for reinforcing the front door 1. The door beam 71 is disposed slightly diagonally downward from the front door 1 in the front-rear direction. The straight door beam 71 and the L-shaped reinforcing member 13 form a triangular truss structure in side view. The front end 71a of the door beam 71 is detachably attached to the reinforcing member 13 provided on the front part 11a of the inner panel 11 via a beam bracket 712. The rear end 71b of the door beam 71 is detachably attached to the rear part 11c of the inner panel 11 via a beam bracket 713. In other words, the rear end 71b of the door beam 71 is disposed adjacent to the rear part 13c of the reinforcing member 13. The door beam 71 is composed of a beam body 711, a front beam bracket 712, and a rear beam bracket 713.

[0029] The beam body 711 is made of, for example, a straight metal pipe. The front beam bracket 712 is a bracket made of a metal plate for attaching the front end portion 71a of the beam main body 711 to the front portion 13a of the reinforcing member 13. The beam bracket 712 has an engagement groove 712a to which the front end portion 71a of the door beam 71 is joined, and a bolt installation hole (not shown) for installing a fixture 714 that fixes the beam bracket 712 to the front portion 13a of the reinforcing member 13.

[0030] 1, the rear beam bracket 713 is a bracket made of a metal plate for attaching the rear end 71b of the beam body 711 to the rear part 11c of the inner panel 11. The beam bracket 713 has an engagement groove 713a to which the rear end 71b of the door beam 71 is joined, and a bolt installation hole (not shown) for installing a fixture 715 that detachably fixes the beam bracket 713 to the rear part 11c of the inner panel 11.

[0031] <Skin Stiffener> 2, the skin stiffener 81 is a door reinforcing member for reinforcing the front door 1, similar to the door beam 71. The skin stiffener 81 is made of, for example, a metal plate member extending in the front-rear direction and having a substantially U-shaped cross section. The skin stiffener 81 has a front end 81a fixed to the front part 13a of the reinforcing member 13 and a rear end 81b fixed to the rear part 11c of the inner panel 11.

[0032] <Skin Appa Stifna> The skin upper stiffener 91 is a metallic reinforcing plate member arranged at the vehicle outer lower part of the window opening 11e of the inner panel 11. The skin upper stiffener 91 has a front end 91a fixed to the front part 13a of the reinforcing member 13 and a rear end 91b fixed to the rear part 11c of the inner panel 11. The skin upper stiffener 91 is arranged between the inner panel 11 and the outer panel 3. The front end 91a and the rear end 91b of the skin upper stiffener 91 are wider in the vertical direction than the central part of the skin upper stiffener 91 to increase rigidity. The skin upper stiffener 91 has a door mirror installation part 91c at the front end 91a and a door handle installation part 91d at the rear end 91b.

[0033] <Skin Sash Stiffener> The skin sash stiffener 93 is a metallic reinforcing plate member disposed over the entire rear portion of the sash portion 11g of the inner panel 11. The skin sash stiffener 93 is disposed from the rear upper end to the rear lower end of the sash portion 11g.

[0034] <Door hinge> 1, the door hinges 31, 31 are hinge members for rotatably mounting the front door 1 to the vehicle body. The door hinges 31, 31 are mounted on the upper and lower front end portions of the front door 1, respectively.

[0035] <Rear door> As shown in Fig. 6, the rear door 2 is a rear side door disposed on the rear side of the vehicle body side. The rear door 2 includes an inner panel 21, an outer panel 22, a reinforcing member 23, a door beam 72, a skin stiffener 82, a skin upper stiffener 92, a hinge stiffener 28 (see Fig. 7), a door hinge 32, a window glass (not shown), a lining (not shown), a window regulator (not shown), a door lock device (not shown), and electrical components such as a harness (not shown).

[0036] <Inner panel> As shown in FIG. 6, the inner panel 21 is a door body that constitutes the framework of the rear door 2, similar to the inner panel 11 of the front door 1. The inner panel 21 is formed of a metal plate member such as a rolled steel plate. The inner panel 21 has a window opening 21e, a speaker installation hole 21f, and a sash portion 21g. A front end 27a and a rear end 27b of the door beam 27 and a front end 82a and a rear end 28b of the skin stiffener 82 are fixed to the front portion 21a and the rear portion 21c of the inner panel 21. The inner panel 21 has a window opening 21e in an upper portion 21d.

[0037] The peripheral edge of the outer panel 22 is fixed to the outer peripheral edge of the inner panel 21 in the vehicle width direction via a door beam 72, a skin stiffener 82, and a skin upper stiffener 92. The inner panel 21 is connected to a center pillar (not shown) so as to be able to be opened and closed by a pair of upper and lower door hinges 32, 32 attached to the front end side. The rear end side of the inner panel 21 is held in a door closed state by a door lock device (not shown).

[0038] 6, the window opening 21e is a location where a window glass (not shown) is disposed. The window opening 21e is formed by the sash portion 21g of the inner panel 21, a skin sash stiffener 94 installed so as to overlap the sash portion 21g, and a skin upper stiffener 92 provided on the lower outer edge of the window opening 21e. The sash portion 21g is a window frame that supports the outer periphery of the window glass (not shown).

[0039] The speaker installation hole 21f is a hole in which a speaker (not shown) is attached, similar to the speaker installation hole 11f of the front door 1. For example, a speaker is attached to the speaker installation hole 21f via a vibration-proof seal material (not shown). The speaker installation hole 21f is formed in the front lower part of the inner panel 21. A bead 21j is formed on the outer periphery of the speaker installation hole 21f to reinforce the speaker installation hole 21f.

[0040] The bead 21h is a reinforcing portion for reinforcing a portion where a window regulator (not shown) is installed. The bead 21h is provided in the center of the inner panel 21 and extends in the vertical direction. The bead 21i is a reinforcing portion for reinforcing a portion where a door lock device (not shown) is installed. The bead 21i is provided on the rear portion 21c of the inner panel 21 so as to extend in the vertical direction.

[0041] The beads 21h, 21i, and 21j are formed as groove-like recesses or protruding bulges in cross-sectional view in the inner panel 21. The beads 21h, 21i, and 21j serve to reinforce the installation surfaces of a window regulator (not shown), a door lock device (not shown), a speaker (not shown), etc., making them less likely to bend.

[0042] <Outer panel> 6, the outer panel 22 is a thin resin member disposed on the vehicle outer side of the inner panel 21. The outer panel 22 is detachably attached to the inner panel 21.

[0043] <Reinforcing material> The reinforcing member 23 is made of a metal plate member installed between the inner panel 21 and the outer panel 22. The reinforcing member 23 is provided continuously from the front part 21a of the inner panel 21 through the lower part 21b to the rear part 21c. Therefore, the reinforcing member 23 is formed in an L-shape (or a U-shape) in side view. By providing the door D with such a reinforcing member 23, the rigidity of the door lower part can be increased.

[0044] The reinforcing member 23 and the inner panel 21 form a front closed cross-sectional portion 24 (see FIG. 7), a lower closed cross-sectional portion 25 (see FIG. 8), and a rear closed cross-sectional portion 16 (see FIG. 9). Therefore, the reinforcing member 23, which is L-shaped (or U-shaped) in side view, is reinforced from the front portion 23a through the lower portion 23b to the rear portion 23c. The upper portion 23d of the reinforcing member 23 extends to the front lower end portion (at least a part of the periphery) of the window opening 21e.

[0045] As shown in Fig. 7, the front closed cross-sectional portion 24 is formed between the hinge stiffener 28 and the front portion 21a of the inner panel 21. The front closed cross-sectional portion 24 has a closed cross-section extending in the up-down direction and has a substantially triangular shape that is long in the left-right direction. The front closed cross-sectional portion 24 extends to the vicinity of the front end portion of the sash portion 21g. Therefore, the front portion 21a of the inner panel 21 has high rigidity.

[0046] As shown in Fig. 8, the lower closed cross-sectional portion 25 is formed between the reinforcing member 23 and the lower portion 21b of the inner panel 21. The lower closed cross-sectional portion 25 has a closed cross-section extending in the front-rear direction and has a substantially rectangular shape that is long in the left-right direction. This gives the lower portion 21b of the inner panel 21 high rigidity. The lower portion 23b of the reinforcing member 23 and the lower portion 21b of the inner panel 21 are connected by a slide clip (not shown).

[0047] As shown in Fig. 9, the rear closed cross-sectional portion 26 is formed between the reinforcing member 23 and the rear portion 21c of the inner panel 21. The rear closed cross-sectional portion 26 has a closed cross-section extending in the up-down direction and has a generally rectangular shape that is elongated in the left-right direction. Therefore, the rear portion 21c of the inner panel 21 has high rigidity. In this embodiment, the rear closed cross-sectional portion 26 has a shorter dimension in the up-down direction than the front closed cross-sectional portion 24.

[0048] <Door beam> As shown in Fig. 6, the door beam 72 is a door reinforcing member for reinforcing the rear door 2. The door beam 72 is disposed slightly diagonally downward toward the rear in the front-rear direction with respect to the rear door 2. The straight door beam 72 and the reinforcing member 23 that is L-shaped in side view form a triangular truss structure in side view. A front end portion 72a of the door beam 72 is detachably attached to the reinforcing member 23 provided on the front portion 21a of the inner panel 21 via a beam bracket 722.

[0049] The rear end 72b of the door beam 72 is detachably attached to the rear part 21c of the inner panel 21 via a beam bracket 723. In other words, the rear end 72b of the door beam 72 is disposed adjacent to the rear part 23c of the reinforcing member 23. The door beam 72 is composed of a beam main body 721, a front beam bracket 722, and a rear beam bracket 723.

[0050] The beam body 721 is made of a metal pipe, similar to the beam body 711 of the front door 1 (see FIG. 1). The front beam bracket 722 is a bracket made of a metal plate for attaching the front end portion 72a of the beam main body 721 to the front portion 23a of the reinforcing member 23. The beam bracket 722 has an engagement groove 722a to which the front end portion 72a of the door beam 72 is joined, and a bolt installation hole (not shown) for installing a fixture 724 that detachably fixes the beam bracket 722 to the front portion 23a of the reinforcing member 23.

[0051] 10, the rear beam bracket 723 is a bracket made of a metal plate for attaching the rear end 72b of the beam main body 721 to the rear part 21c of the inner panel 21. The beam bracket 723 has an engagement groove 723a with which the rear end 72b of the door beam 72 engages, and a bolt installation hole (not shown) for installing a fastener 725 (see FIG. 11) that fixes the beam bracket 723 to the rear part 21c of the inner panel 21.

[0052] <Skin Stiffener> 6, the skin stiffener 82 is a door reinforcing member for reinforcing the rear door 2, similar to the door beam 72 of the front door 1. The skin stiffener 82 is made of, for example, a metal plate member extending in the front-rear direction. The skin stiffener 82 has a front end 82a fixed to the front part 23a of the reinforcing member 23, and a rear end 82b fixed to the rear part 21c of the inner panel 21.

[0053] <Skin Appa Stifna> The skin upper stiffener 92 is a metallic reinforcing plate member arranged on the vehicle outer lower part of the window opening 21e of the inner panel 21. The skin upper stiffener 92 is fixed from the front part 23a of the reinforcing member 23 to the rear part 21c of the inner panel 21. The skin upper stiffener 92 is arranged between the inner panel 21 and the outer panel 22.

[0054] <Skin Sash Stiffener> The skin sash stiffener 94 is a metallic reinforcing plate member disposed over the entire front portion of the sash portion 21g of the inner panel 21. The skin sash stiffener 94 is disposed across from the front upper end to the front lower end of the sash portion 21g.

[0055] <Door hinge> 6, the door hinges 32, 32 are hinge members for rotatably mounting the rear door 2 to a front pillar (not shown). The door hinges 32, 32 are mounted above and below the front end of the rear door 2, respectively.

[0056] <Outer panel> The outer panel 22 is a thin resin member disposed on the vehicle outer side of the inner panel 21. The outer panel 22 is attached to the inner panel 21 in a detachable manner.

[0057] <Action and effect> The vehicle door structure 100 according to this embodiment is basically configured as described above. Next, the effects of the vehicle door structure 100 will be described.

[0058] 1 and 6, the resin outer panels 12, 22 are detachably attached to the inner panels 11, 21, which facilitates recycling and reduces the weight, while the rigidity is increased by the reinforcing members 13, 23. Therefore, the vehicle door structure 100 according to the embodiment of the present invention can contribute to solving environmental problems that are a global challenge, and can also greatly contribute to achieving the Sustainable Development Goals (SDGs).

[0059] As shown in Figures 1 and 6, a vehicle door structure 100 includes an inner panel 11, 21, an outer panel 12, 22 arranged on the vehicle exterior side of the inner panel 11, 21, and a reinforcing member 13, 23 installed between the inner panel 11, 21 and the outer panel 12, 22, and the reinforcing member 13, 23 is provided continuously across the front portion 11a, 21a, lower portion 11b, 21b and rear portion 11c, 21c of the inner panel 11, 21.

[0060] According to this configuration, the reinforcing members 13, 23 extend from the front parts 11a, 21a to the rear parts 11c, 21c of the lower parts 11b, 21b of the inner panels 11, 21. Therefore, the door D can reinforce the area between the front parts 11a, 21a to the rear parts 11c, 21c of the lower parts 11b, 21b, and therefore the rigidity of the entire lower part can be increased.

[0061] Also, as shown in Figures 1 and 6, the reinforcing members 13, 23 have front closed cross-sectional portions 14, 24 (see Figures 3 and 7) formed between the front portions 11a, 21a of the inner panels 11, 21, lower closed cross-sectional portions 15, 25 (see Figures 4 and 8) formed between the lower portions 11b, 21b of the inner panels 11, 21, and rear closed cross-sectional portions 16, 26 (see Figures 5 and 9) formed between the rear portions 11c, 21c of the inner panels 11, 21.

[0062] According to this configuration, the reinforcing members 13, 23 include the front closed cross-sectional portions 14, 24 (see Figs. 3 and 7), the lower closed cross-sectional portions 15, 25 (see Figs. 4 and 8), and the rear closed cross-sectional portions 16, 26 (see Figs. 5 and 9). Therefore, the front door 1 and the rear door 2 form a continuous closed cross-sectional portion between the front portion 11a, 21a and the rear portion 11c, 21c of the lower portion 11b, 21b of the door D, thereby more effectively increasing the rigidity of the door lower portion.

[0063] As shown in FIG. 1, the inner panel 11 has a window opening 11e in the upper portion 11d, and the reinforcing member 13 extends to at least a part of the periphery of the window opening 11e.

[0064] According to this configuration, the reinforcing member 13 extends to at least a part of the periphery of the window opening 11e, and therefore the sash portion 11g of the window opening 11e can also be reinforced. Therefore, the reinforcing member 13 also has a function as a sash reinforcing member for reinforcing the sash portion 11g, making the sash reinforcing member unnecessary, thereby reducing the number of parts and achieving weight reduction.

[0065] As shown in Figures 1 and 6, door beams 71, 72 are provided having front end portions 71a, 72a and rear end portions 72b, 72b fixed to the front portions 11a, 21a and rear portions 11c, 21c of the inner panel 11, 21, and the front end portions 71a, 72a and rear end portions 71b, 72b of the door beams 71, 72 are fixed to the reinforcing members 13, 23 or are arranged adjacent to the reinforcing members 13, 23.

[0066] According to this configuration, the reinforcing members 13, 23 are disposed across the front portions 11a, 23a and the rear portions 11c, 21c, and the door beams 71, 72 are connected to the front portions 11a, 21a and the rear portions 11c, 21c. Therefore, the reinforcing members 13, 23 and the door beams 71, 72 can form a triangular truss structure in a side view, which can further increase the rigidity of the door lower portion.

[0067] As shown in FIGS. 6 and 10, the front end 72a and the rear end 72b of the door beam 72 are both fixed to the reinforcing member 23.

[0068] According to this configuration, the front end 72a and the rear end 72b of the door beam 72 are fixed to the reinforcing member 23, so that a truss structure can be formed by the reinforcing member 23 and the door beam 72. This can further increase the rigidity of the lower part of the door.

[0069] As shown in FIGS. 1, 2 and 6, the outer panels 12, 22 and the door beams 71, 72 are detachably attached to the inner panels 11, 21.

[0070] According to this configuration, the outer panels 12, 22 and the door beams 71, 72 are detachable from the inner panels 11, 21, and can be removed from the inner panels 11, 21. Therefore, the fittings such as the window regulator 41 can be attached to the door D from the outside of the vehicle, which improves the ease of installation of the fittings to the door D. Since the fittings can be attached to the door D from the outside of the vehicle, it is no longer necessary to form work holes in the inner panels 11, 21 for installing the fittings, and therefore the rigidity of the inner panels 11, 21 can be increased.

[0071] [Variations] The present invention is not limited to the above-described embodiment, and various modifications and changes are possible within the scope of the technical concept thereof. It goes without saying that the present invention also covers such modifications and changes.

[0072] In the above embodiment, as shown in Fig. 1 and Fig. 6, a hinged door having door hinges 31, 32 has been described as an example of the door D, but there is no particular limitation as long as the door D is an opening / closing body capable of installing the inner panels 11, 21 and the outer panels 12, 22. The door D may be, for example, a sliding door or a gull-wing door.

[0073] Further, the outer panels 12, 22 have been described as being formed of a resin plate member as an example, but the material is not particularly limited, and may be a light alloy such as an aluminum alloy or a magnesium alloy. [Explanation of symbols]

[0074] 1. Front Door 2 Rear door 11,21 Inner panel 11a,21a front 11b,21b bottom 11c,21c rear 11d,21d upper part 11e,21e Window opening 12,22 Outer panel 13,23 Reinforcement members 14,24 Front closed section 15,25 Lower closed section 16,26 Rear closed section 71,72 Door beam 71a,72a Front end 71b,72b Rear end 100 Vehicle door structure

Claims

1. A vehicle door structure including an inner panel, an outer panel disposed on an outer side of the inner panel, and a reinforcing member disposed between the inner panel and the outer panel, The reinforcing member is provided continuously across the front, lower and rear portions of the inner panel. A vehicle door structure.

2. The reinforcing member is a front closed cross-sectional portion formed between the front portion of the inner panel and the front closed cross-sectional portion; a lower closed cross-sectional portion formed between the lower portion of the inner panel and the lower closed cross-sectional portion; and a rear closed cross-sectional portion formed between the rear portion of the inner panel. The vehicle door structure according to claim 1 .

3. The inner panel has a window opening at an upper portion, The reinforcing member extends to at least a portion of the periphery of the window opening. The vehicle door structure according to claim 1 .

4. a door beam having a front end and a rear end fixed to the front and rear portions of the inner panel, The front end and the rear end of the door beam are fixed to the reinforcing member or disposed adjacent to the reinforcing member. The vehicle door structure according to claim 1 .

5. The front and rear ends of the door beam are both fixed to the reinforcing member. The vehicle door structure according to claim 4.

6. The outer panel and the door beam are detachably attached to the inner panel. The vehicle door structure according to claim 4 or 5.

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