Vehicle side door structure

Abstract

To enhance rigidity of a side door to enhance stability of the door being opened.SOLUTION: A vehicle side door structure is provided with a swing arm that connects a door inner panel 10 to a vehicle body. A front end part of the door inner panel 10 is provided with a front-side latch mounting part 15A, and a rear end part thereof is with provided a rear-side latch mounting part 15B. The door inner panel 10 is provided with a belt line part 14. A front-side reinforcement 21 extending in a vertical direction is joined to a front part of the door inner panel 10. A lower part of the front-side reinforcement 21 is arranged below the door inner panel 10 and an upper part thereof is arranged in the belt line part 14.SELECTED DRAWING: Figure 3

Description

[Technical field]

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

[0002] A side door attached to the side of a vehicle body so as to open and close a door opening provided on the side of the vehicle body has a structure in which the side door projects outward in parallel in the vehicle width direction and moves in the front-rear direction to open and close, as disclosed in Patent Document 1. This type of side door structure is called a glide sliding door or a slide door because it moves smoothly in parallel in the air away from the vehicle body.

[0003] Moreover, the front and rear of such a side door are provided with a front latch and a rear latch that can be manually operated by a door handle or the like. The front latch of the side door engages with a striker provided at the front edge of the door opening of the vehicle body, and the rear latch engages with a striker provided at the rear edge of the door opening. Moreover, the side door in this example is connected to the rear edge of the door opening via a swing arm having a link member. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2007-177587 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the above-mentioned configuration, when the side door is open, it is supported by the vehicle body via the link member, so in order to stabilize the side door in the open state, it is necessary to increase the rigidity of the link member. If an attempt is made to increase the rigidity of the link member, the size and weight of the link member will increase.

[0006] On the other hand, if the rigidity of the link member is not sufficiently ensured, in the event of a side collision (side impact), the upper part of the side door may deform toward the outside of the vehicle, increasing the gap between the side of the vehicle body and the upper part of the side door. For example, when a side impact occurs, cargo loaded on the vehicle moves relative to the vehicle body due to inertial force or the like. At that time, the cargo may press the side door from the inside to the outside of the vehicle, causing the side door to deform so that the gap between the side of the vehicle body and the upper part of the side door increases. When such deformation occurs, the cargo may be thrown out of the vehicle. For this reason, the configuration of the above example leaves room for improvement in terms of suppressing deformation of the side door.

[0007] The present invention has been made to solve the above-mentioned problems, and its object is to provide a vehicle side door structure that can improve the rigidity of the side door and improve the stability when the side door is in an open state. [Means for solving the problem]

[0008] In order to achieve the above object, the present invention provides a vehicle side door structure having a door outer panel and a door inner panel provided on the vehicle inner side of the door outer panel, a swing arm connecting the door inner panel to a vehicle body is provided at a middle portion of the door inner panel in the vehicle front-rear direction, a front latch attachment portion is provided at a front end of the door inner panel, and a rear latch attachment portion is provided at a rear end of the door inner panel. In the vehicle side door structure, the front latch attachment portion is disposed below the rear latch attachment portion, the door inner panel is provided with a belt line portion extending in the vehicle front-rear direction, and a front reinforcement extending in the vehicle up-down direction is joined to a front portion of the door inner panel, a lower portion of the front reinforcement is disposed at a lower portion of the door inner panel, and an upper portion of the front reinforcement is disposed at the belt line portion. a first center member extending in the vehicle vertical direction is provided on the vehicle rear side of the front reinforcement, an upper portion of the first center member is joined to the belt line portion, a lower portion of the first center member is joined to a lower portion of the door inner panel, a second center member extending in the vehicle front-rear direction is provided at a middle portion of the door inner panel in the vehicle vertical direction, the front reinforcement is joined to a front portion of the second center member via the first center member, and the swing arm is rotatably attached to the middle portion of the first center member in the vehicle vertical direction. is. Effect of the Invention

[0009] According to the present invention, it is possible to improve the rigidity of the side door and further improve the stability when the side door is in an open state. [Brief description of the drawings]

[0010] [Figure 1] 1 is a side view showing an embodiment of a vehicle side door structure according to the present invention; [Diagram 2] FIG. 2 is a side view of the side door of FIG. 1 as seen from the outside of the vehicle. [Diagram 3] FIG. 3 is a side view showing a state in which the belt line reinforcement in FIG. 2 has been removed. [Figure 4] FIG. 4 is a perspective view of the side door of FIG. 3 as viewed from the rear of the vehicle. [Diagram 5] FIG. 4 is a cross-sectional view taken along the line AA in FIG. [Figure 6] FIG. 5 is a cross-sectional view taken along the line BB in FIG. 4. [Figure 7] FIG. 2 is a top view of the side door of FIG. 1 when it is open. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of the structure of a vehicle side door 1 of a vehicle according to the present invention will be described with reference to the drawings (FIGS. 1 to 7). In the drawings, the direction of the arrow Fr indicates the front in the vehicle longitudinal direction. In the description of the embodiment, the "front (front end) and rear (rear end)" correspond to the front and rear in the vehicle longitudinal direction. Also, the arrow In indicates the inside in the vehicle width direction (inner side of the vehicle), and the arrow Out indicates the outside in the vehicle width direction (outer side of the vehicle).

[0012] The side door 1 of this embodiment has a so-called glide sliding door structure in which the side door 1 protrudes in parallel to the outside in the vehicle width direction and moves in the front-rear direction to open and close. The side door 1 is rotatably connected to the side of the vehicle body by a swing arm 16 so as to open and close a door opening 2 provided in the side of the vehicle body. When the side door 1 opens and closes the door opening 2, the side door 1 maintains the orientation of the closed state and moves toward the outside of the vehicle while also moving toward the rear of the vehicle. That is, when the side door 1 is opened and closed, it opens and closes while maintaining a state in which the side door 1 extends in the front-rear direction of the vehicle. The opening and closing operation of the side door 1 will be described later.

[0013] As shown in FIG. 1, the side door 1 of this embodiment is configured to be able to open and close a door opening 2 provided on the side of the vehicle body. A center pillar 5 extending in the vertical direction of the vehicle is disposed in front of the door opening 2, and a quarter pillar 6 is disposed in the rear of the door opening 2. The quarter pillar 6 extends in the vertical direction of the vehicle as a whole, and the intermediate portion in the vertical direction of the vehicle has a convex shape that convex toward the rear of the vehicle. In addition, a side sill 7 extending in the longitudinal direction of the vehicle is disposed in the lower portion of the door opening 2. In addition, as shown in FIG. 7, a space S2 is formed between the side door 1 and the side sill 7 when the door is open. That is, the side sill 7 is provided in the lower portion of the door opening 2 provided on the side of the vehicle body, and when the side door 1 is open, the space S2 extends continuously in the longitudinal direction of the vehicle from the front end to the rear end of the door opening 2 between the lower portion of the door inner panel 10 described later and the side sill 7. The side door 1 of this embodiment is supported by a swing arm 16 on the vehicle body.

[0014] The side door 1 is a type of side door 1 having a door sash, and includes a door inner panel 10 constituting the main body of the side door 1, and a door outer panel 31 joined to the vehicle outer side of the door inner panel 10. The side door 1 also has a swing arm 16 connected to the vehicle inner side of the door inner panel 10. Furthermore, the side door 1 has a front door latch 30A, a rear door latch 30B, a front reinforcement 21, a rear reinforcement 23, a first center member 25, a second center member 28, and a beltline reinforcement 18.

[0015] First, the structure of the door inner panel 10 will be described. The door inner panel 10 has an outer peripheral shape corresponding to the shape of the door opening 2. A belt line portion 14 is provided in the middle of the door inner panel 10 in the vertical direction of the vehicle, and a door sash and a window opening 12 are provided on the vehicle upper side of the belt line portion 14. The belt line portion 14 extends in the vehicle front-rear direction between the front end and the rear end of the door inner panel 10. Of the door sashes, a front sash 11A located on the front side extends from the front part of the belt line portion 14 toward the vehicle upper side. Of the door sashes, a rear sash 11B located on the rear side extends at an angle toward the front of the vehicle as it moves from the rear part of the belt line portion 14 toward the vehicle upper side. The door sashes including the front sash 11A and the rear sash 11B form a window frame of the window opening 12.

[0016] The vehicle lower side of the window opening 12 has a main wall portion 10a facing the outside of the vehicle, a rear wall portion 10b facing the rear of the vehicle, and a front wall portion 10d. In this example, the rear wall portion 10b protrudes from the rear end of the main wall portion 10a to the outside of the vehicle, extends in the vertical direction of the vehicle, and is substantially perpendicular to the main wall portion 10a. The front wall portion 10d protrudes from the rear end of the main wall portion 10a to the outside of the vehicle and extends in the vertical direction of the vehicle. The main wall portion 10a is provided with a lower opening portion 13 that communicates between the outside and inside of the vehicle.

[0017] In addition, the portion of the door inner panel 10 on the vehicle lower side of the belt line portion 14 at the rear of the door inner panel 10 extends downward from the belt line portion 14 to a predetermined position, and then inclines toward the front of the vehicle as it moves downward from the predetermined position to the lower portion of the door inner panel 10. In other words, the rear of the door inner panel 10 is formed so that the middle portion in the vehicle up-down direction protrudes toward the rear of the vehicle. The protruding shape roughly corresponds to the shape of the rear of the door opening 2.

[0018] Further, a front latch mounting portion 15A is provided at the front of the door inner panel 10, and a rear latch mounting portion 15B is provided at the rear of the door inner panel 10. The front latch mounting portion 15A and the rear latch mounting portion 15B are disposed at different positions in the vertical direction of the vehicle. In this example, the front latch mounting portion 15A is disposed on the vehicle lower side than the rear latch mounting portion 15B.

[0019] The front latch attachment portion 15A is provided at the front end of the door inner panel 10. In this embodiment, the front latch attachment portion 15A is provided so as to be continuous with the middle portion of the front wall portion 10d of the door inner panel 10 in the vehicle vertical direction and the front end of the main wall portion 10a. The front latch attachment portion 15A also has an elongated hole 15Aa formed in the corner portion formed by the front wall portion 10d and the main wall portion 10a, and a plurality of through-holes 15Ab provided around the elongated hole 15Aa. The front latch attachment portion 15A is disposed slightly below the center of the front edge portion of the lower opening 13 in the vehicle vertical direction. In Figs. 2 and 3, the position of the front latch attachment portion 15A is indicated by a vertical dashed line.

[0020] Further, the front latch attachment portion 15A has a convex shape that is convex toward the inside of the vehicle relative to the belt line portion 14 and the lower portion of the door inner panel 10. The convex shape and the apex (the end on the inside of the vehicle) extend in the vertical direction of the vehicle as shown in Fig. 5. The upper and lower ends of the front door latch 15A are disposed so as to substantially correspond to the upper and lower ends of the apex of the convex shape.

[0021] On the other hand, the rear latch attachment portion 15B is provided at the rear end of the door inner panel 10 and the belt line portion 14, and is formed in a substantially rectangular area extending in the vehicle up-down direction. The rear latch attachment portion 15B of this embodiment is arranged so as to overlap the belt line portion 14 when viewed in the vehicle width direction. More specifically, it is provided at the rear wall portion 10b of the door inner panel 10. The rear wall portion 10b in this example also includes the rear end of the belt line portion 14. The upper portion of the rear latch attachment portion 15B is arranged so as to overlap the rear end of the belt line portion 14, and the lower portion of the rear latch attachment portion 15B is arranged at the upper portion of the rear wall portion 10b. In Figs. 2 and 3, the position of the rear latch attachment portion 15B is indicated by a vertical dashed line.

[0022] Next, a description will be given of the front reinforcement 21. The front reinforcement 21 is a plate-shaped member that has a predetermined length in the front-rear direction of the vehicle and extends in the up-down direction of the vehicle, as shown in Figures 2 and 3. The front reinforcement 21 is joined to the front portion of the door inner panel 10.

[0023] An upper portion of the front reinforcement 21 extends in the vehicle front-rear direction, and is disposed in front of the beltline portion 14. In this example, the upper portion is joined to the front portion of the beltline portion 14 by spot welding or the like. In FIG. 4, the spot welding points are indicated by black dots W. The upper portion of the front reinforcement 21 is disposed so that the position of the upper end of the beltline portion 14 and the position of the upper end of the front reinforcement 21 are substantially aligned, and is disposed on the vehicle lower side of the front sash 11A, and further disposed so as to overlap the corner formed by the front edge portion of the lower opening 13 and the beltline portion 14 when viewed in the vehicle width direction.

[0024] A lower portion of the front reinforcement 21 is disposed in the lower portion of the door inner panel 10, and in this example, is disposed so as to overlap, as viewed in the vehicle width direction, with a corner formed by a lower edge portion and a front edge portion of the lower opening 13. That is, the front reinforcement 21 is joined to the main wall portion 10a on the vehicle outer side of the door inner panel 10 at the position of welding point W in FIG. 4, in a state in which the lower opening 13 is straddled in the vehicle up-down direction.

[0025] The front reinforcement 21 has an outer surface 21b facing the outside of the vehicle, and a flange 21a that is bent outward in the vehicle width direction from the front end of the outer surface 21b and joined to the front wall portion 10d of the door inner panel 10 at a welding point W in Figure 4.

[0026] Furthermore, the front end of the outer surface 21b of the front reinforcement 21 and the flange 21a extend in the vertical direction of the vehicle along the shape of the front end portion of the door inner panel 10, with the upper part of the flange 21a being positioned in front of the beltline portion 14 and the lower part of the flange 21a being positioned at the lower part of the front wall portion 10d.

[0027] The front part of the lower part of the outer surface 21b is inclined toward the rear of the vehicle as it approaches the bottom of the vehicle. A mounting part 19 for mounting a door handle is provided at the middle part of the front part of the outer surface 21b in the vertical direction of the vehicle. The rear end of the outer surface 21b extends in the vertical direction of the vehicle.

[0028] A front portion of the outer surface 21b of the front reinforcement 21 is joined to the main wall portion 10a of the door inner panel 10 that constitutes the front edge portion of the lower opening 13, and a lower portion of the outer surface 21b is joined to the main wall portion 10a of the door inner panel 10 that constitutes the lower edge portion of the lower opening 13 at the position of welding point W in Fig. 4. In addition, a front extension portion 25a (described later) of the first center member 25 is joined by spot welding or the like to a middle portion in the vehicle up-down direction at the rear of the outer surface 21b of the front reinforcement 21.

[0029] Moreover, the flange 21a is disposed so as to cover the front latch attachment portion 15A (FIG. 4). In this example, the front door latch 30A is attached to the front latch attachment portion 15A of the door inner panel 10 with the front reinforcement 21 interposed therebetween.

[0030] When the side of the vehicle body is subjected to a side collision or the like, cargo inside the vehicle may move outward and press against the side door 1, causing deformation that causes the door sash to collapse toward the outside of the vehicle. At this time, a rotational force acts on the side door 1 around the imaginary line connecting the front latch attachment portion 15A and the rear latch attachment portion 15B as the rotation axis X. The door sash located at the upper end of the side door 1 deforms toward the outside of the vehicle, causing the side door 1 to deform so as to open. Meanwhile, the lower end of the side door 1 tries to deform toward the inside of the vehicle.

[0031] In this embodiment, the front reinforcement 21 is joined to the front latch mounting portion 15A, and the front reinforcement 21 is joined to the lower part of the door inner panel 10 and the belt line portion 14, thereby improving the rigidity of the front latch mounting portion 15A in the fore-and-aft direction and the width direction of the vehicle, and further, when the lower part of the door inner panel 10 is pressed toward the inside of the vehicle, the reinforcement of the lower part of the door inner panel 10 can prevent the upper end side of the side door 1 from opening to the outside of the vehicle.

[0032] In addition, the imaginary rotation axis X, the belt line portion 14 extending in the vehicle longitudinal direction, and the front portion of the door inner panel 10 extending in the vehicle vertical direction are arranged to form a substantial triangle, thereby increasing rigidity and suppressing deformation that tends to rotate around the imaginary rotation axis X. That is, the imaginary rotation axis X that connects the rear latch attachment portion 15B and the front latch attachment portion 15A is connected to the belt line portion 14, so that it is possible to distribute stress to the front portion of the side door 1 along the belt line portion 14.

[0033] By joining the flange 21a of the front reinforcement 21 to the front wall portion 10d, the front reinforcement 21 can improve the rigidity of the door inner panel 10 in the vehicle width direction. Furthermore, by extending the flange 21a from the belt line portion 14 to the lower part of the door inner panel 10, it is possible to further expand the range in which the rigidity of the door inner panel 10 in the vehicle width direction is improved, thereby enhancing the effect of suppressing deformation of the door inner panel 10.

[0034] In addition, the front latch attachment portion 15A of the door inner panel 10 of this embodiment has a convex shape toward the inside of the vehicle, which allows the load to be distributed to the belt line portion 14 and the lower portion of the door inner panel 10. In addition, since the flange 21a has a convex shape, the width (length in the vehicle width direction) is increased, which makes it possible to further improve the rigidity of the door inner panel 10 in the vehicle width direction.

[0035] In addition, the length of the front reinforcement 21 in the vehicle front-rear direction in this embodiment is greater than the length of the front sash 11A in the vehicle front-rear direction. In this example, the front end of the upper part of the outer surface 21b of the front reinforcement 21 and the front end of the upper part of the flange 21a are disposed so as to be substantially aligned with the front end of the lower part of the front sash 11A in the vehicle front-rear direction, and are joined to the front part of the beltline portion 14. The rear end of the outer surface 21b is joined to the beltline portion 14 located rearward of the rear end of the lower part of the front sash 11A at the position of welding point W in FIG. 4.

[0036] When a load is input to the front reinforcement 21, the length of the front reinforcement 21 in the vehicle front-rear direction is greater than the length of the front sash 11A in the vehicle front-rear direction, so it is possible to suppress deformation of the front latch attachment portion 15A in the vehicle up-down direction. Furthermore, by setting the length in the vehicle front-rear direction as described above, it becomes easier to distribute stress to the belt line portion 14 and the lower part of the door inner panel 10.

[0037] Next, the rear reinforcement 23 will be described. As shown in Figures 2 and 3, the rear reinforcement 23 in this embodiment is a plate-like member joined to the rear of the door inner panel 10, has a predetermined length in the vehicle front-rear direction, and extends in the vehicle up-down direction so as to follow the convex shape of the rear of the door inner panel 10. In this example, the lower part of the rear reinforcement 23 is disposed in the middle part of the main wall part 10a of the door inner panel 10 that constitutes the rear edge part of the lower opening 13 in the vehicle up-down direction.

[0038] Furthermore, the rear reinforcement 23 of this embodiment is disposed so as to overlap the rear latch attachment portion 15B when viewed in the vehicle width direction. In this example, the rear portion of the rear reinforcement 23 is disposed so as to cover the rear latch attachment portion 15B, and the rear door latch 30B is attached to the rear latch attachment portion 15B of the door inner panel 10 with the rear reinforcement 23 interposed therebetween.

[0039] Furthermore, although detailed illustration is omitted, the rear reinforcement 23 has a curved portion 23d that is curved to correspond to the rear wall portion 10b of the door inner panel 10. The curved portion 23d is curved so as to bulge toward the inside of the vehicle, and is curved so as to cover the corner portion formed by the main wall portion 10a and the rear wall portion 10b of the door inner panel 10 from the outside of the vehicle.

[0040] The rear reinforcement 23 is joined to the rear end of the belt line portion 14 while overlapping it. Furthermore, the rear reinforcement 23 extends to the door sash provided above the belt line portion 14. In detail, an upper extension portion 23e is provided at the upper portion of the rear reinforcement 23, which extends above the belt line portion 14. The upper extension portion 23e extends to the middle portion of the rear sash 11B in the vertical direction of the vehicle. In this example, the upper portion of the upper extension portion 23e is disposed below the center between the upper end and the lower end of the rear sash 11B. The upper extension portion 23e is provided with a step corresponding to the step shape of the rear sash 11B, improving the joining strength between the upper extension portion 23e and the rear sash 11B.

[0041] The door inner panel 10 of this embodiment is provided with a first center member 25 and a second center member 28, with the first center member 25 joined to the front reinforcement 21 and the rear part of the second center member 28 joined to the rear reinforcement 23. Furthermore, the first center member 25 and the second center member 28 are joined to each other. The first center member 25 and the second center member 28 will be described below.

[0042] The first center member 25 is a member that extends in the vertical direction of the vehicle as a whole, and is disposed so as to straddle the lower opening 13. A front extension 25a that extends toward the front of the vehicle is provided in the middle of the main body of the first center member 25 in the vertical direction of the vehicle. The front part of the front extension 25a is formed by connecting the front end of the lower side of the main body of the first center member 25 and the lower end of the front part of the front extension 25a. The front part of the front extension 25a is joined to the rear part of the outer surface 21b of the front reinforcement 21 by spot welding or the like. This makes it possible for the front reinforcement 21 to be supported by the first center member 25.

[0043] The first center member 25 is also provided with a vertical rib 27 and a front-rear rib 26. The vertical rib 27 extends in the vertical direction of the vehicle from the top to the bottom of the first center member 25. The front-rear rib 26 is disposed in the middle of the first center member 25 in the vertical direction of the vehicle, and extends from the rear of the first center member 25 toward the front of the vehicle to the front end of the front extension part 25a.

[0044] The second center member 28 is a member extending in the front-rear direction of the vehicle, and is disposed in the middle of the lower opening 13 in the vertical direction of the vehicle. A front portion of the second center member 28 is joined to the rear portion of the first center member 25 by spot welding or the like. A flange 28a is provided at the rear portion of the second center member 28, and the flange 28a is joined to the front lower portion of the rear reinforcement 23.

[0045] Furthermore, in this embodiment, by joining the second center member 28 to the rear reinforcement 23, when a load is input to the rear reinforcement 23 from the vehicle width direction, a tensile force is generated in the first center member 25 and the second center member 28 in the front-to-rear direction of the vehicle, and deformation of the door inner panel 10 in the vehicle width direction can be supported by the first center member 25 and the second center member 28. As described above, in this embodiment, the second center member 28 and the front-to-rear rib 26 of the first center member 25 are arranged so as to be continuous in the vehicle front-to-rear direction, so the above effect can be further enhanced.

[0046] In this embodiment, a beltline reinforcement 18 extending in the front-rear direction of the vehicle is attached to the beltline portion 14. The beltline reinforcement 18 is disposed so as to cover the beltline portion 14, the front reinforcement 21, the first center member 25, and the rear reinforcement 23 from the outside of the vehicle, and is joined to these by spot welding or the like. By providing the beltline reinforcement 18, the beltline portion 14 is reinforced, and the load acting on the rear latch attachment portion 15B, etc. can be distributed to the beltline portion 14 via the rear reinforcement 23, etc.

[0047] In addition, in this embodiment, since the rear latch attachment portion 15B and the rear reinforcement 23 overlap, even if the load is concentrated around the rear door latch 30B, the load is distributed to the rear reinforcement 23, and the load in the vehicle width direction can be supported along the rear wall portion 10b. As a result, deformation of the rear end portion of the side door 1 in the vehicle width direction can be suppressed.

[0048] In addition, as described above, by joining the rear reinforcement 23 to the rear part of the beltline portion 14, it is possible to distribute the load input to the rear latch attachment portion 15B to the front end portion of the door sash or the side door 1. This allows a certain amount of elastic deformation to occur, making it possible to prevent damage in the vicinity of the beltline portion 14.

[0049] Furthermore, by providing the upper extension portion 23e, it is possible to reinforce the belt line portion 14 and further suppress deformation of the door sash due to separation from the vehicle body. That is, the configuration of this embodiment first improves the rigidity of the belt line portion 14, suppressing deformation of the belt line portion 14, and secondly, suppresses deformation of the door sash such as bending outward.

[0050] In this embodiment, a closed cross-sectional structure S1 is formed by the front reinforcement 21 and the door inner panel 10. In detail, as shown in Fig. 6, the closed cross-sectional structure S1 is formed by the main wall portion 10a and the front wall portion 10d at the lower portion of the door inner panel 10, and the lower portion of the front reinforcement 21. The closed cross-sectional structure S1 is provided not in a horizontal cross section, but in a cross section along the vehicle lower side toward the vehicle rear at the front lower portion of the side door 1, as shown in Fig. 4.

[0051] A load is input to the lower part of the door inner panel 10 in the vehicle width direction inward. In response to this, the closed cross-sectional structure S1 is formed in the lower part of the door inner panel 10, which makes it possible to improve the rigidity in the vehicle width direction at the lower part of the side door 1. In addition, the closed cross-sectional structure S1 forms a closed cross section along the above-mentioned inclination direction, and therefore contributes to improving the rigidity in the vehicle front-rear direction as well.

[0052] Next, a brief description will be given of the swing arm 16. Although shown diagrammatically in Fig. 1, one end of the swing arm 16 is rotatably attached to a middle portion of the first center member 25 in the vehicle up-down direction, and the other end is rotatably attached to a vehicle body panel on the rear side of a quarter pillar 6 located at the rear of the door opening 2.

[0053] As shown in Figs. 1 and 7, the swing arm 16 has two link members 16a, and the front parts of the two link members 16a are connected to a rotation shaft 16c extending in the vehicle vertical direction. The two link members 16a extend in the vehicle front-rear direction and are arranged at a distance from each other in the vehicle vertical direction. The rear parts of the link members 16a are rotatably attached to a vehicle body panel or the like via an attachment part 16b. The swing arm 16 is disposed near the intersection of the vertical rib 27 and the front-rear rib 26 of the first center member 25. As a result, the swing arm 16 is attached to a portion having a relatively high rigidity, and therefore the swing arm 16 can rotate stably.

[0054] When the side door 1 is changed from a closed state to an open state, the two link members 16a rotate around a rotation shaft (not shown) attached to a body panel. In response to this movement, the two link members 16a rotate around a rotation shaft 16c attached to the first center member 25.

[0055] In this embodiment, no member such as the link member 16a of the swing arm 16 is provided at the upper end or lower end of the side door 1, and the side door 1 is supported by the vehicle body by the swing arm 16 located at the middle part in the vertical direction of the vehicle. That is, when the side door 1 is open, a space S2 is formed between the lower part of the door inner panel 10 and the side sill 7 at the side of the vehicle body, which space extends continuously in the vehicle longitudinal direction from the front end to the rear end of the door opening 2. That is, in the open state of the side door 1 of this example, no obstacle is disposed between the lower part of the side door 1 and the side sill 7 between the front end and the rear end of the door opening 2. Therefore, since the swing arm 16 is not provided at the upper end and the lower end of the side door 1, the connection parts of the side door 1 with the vehicle body are the swing arm 16, the front door latch 30A, and the rear door latch 30B.

[0056] The description of the present embodiment is merely an example for explaining the present invention, and does not limit the invention described in the claims. Furthermore, the configuration of each part of the present invention is not limited to the above embodiment, and various modifications are possible within the technical scope described in the claims. [Explanation of symbols]

[0057] 1 Side door 2 Door opening 5 Center pillar 6 Quarter Pillar 7 Side sill 10 Door inner panel 10a Main wall 10b Rear wall 10d Front wall 11A Front sash 11B Rear sash 12 Window opening 13 Lower opening 14 Belt line section 15A Front latch attachment part 15Aa long hole 15Ab Through round hole 15B Rear latch attachment part 16 Swingarm 16a Link member 16b Mounting part 16c Rotating shaft 18 Beltline reinforcement 19 Mounting part 21 Front reinforcement 21a Flange 21b External surface 23 Rear reinforcement 23e Upper extension 25 1st Center Member 25a Front extension 26 Front-rear rib 27 Vertical ribs 28 2nd Center Member 28a flange 30A Front Door Latch 30B Rear door latch 31 Door outer panel S1 Closed section structure S2 Space between side sill and side door W Welding point

Claims

1. a door outer panel and a door inner panel provided on an inner side of the door outer panel, A swing arm is provided at a middle portion of the door inner panel in the vehicle front-rear direction to connect the door inner panel to a vehicle body, A vehicle side door structure, comprising: a front end portion of the door inner panel provided with a front latch attachment portion; and a rear end portion of the door inner panel provided with a rear latch attachment portion, the front latch attachment portion is disposed lower on the vehicle than the rear latch attachment portion, The door inner panel is provided with a belt line portion extending in a front-rear direction of the vehicle, A front reinforcement extending in the vehicle vertical direction is joined to the front portion of the door inner panel, A lower portion of the front reinforcement is disposed in a lower portion of the door inner panel, and an upper portion of the front reinforcement is disposed in the belt line portion, A first center member extending in a vehicle up-down direction is provided on the vehicle rear side of the front reinforcement, an upper portion of the first center member is joined to the belt line portion, and a lower portion of the first center member is joined to a lower portion of the door inner panel, A second center member extending in a vehicle front-rear direction is provided in an intermediate portion of the door inner panel in the vehicle up-down direction, and the front reinforcement is joined to a front portion of the second center member via the first center member, 13. A vehicle side door structure, comprising: a swing arm rotatably attached to a middle portion of the first center member in a vertical direction of the vehicle;

2. The door inner panel has a main wall portion facing an outer side of the vehicle and a front wall portion extending from a front end of the main wall portion toward the outer side of the vehicle, The front reinforcement is provided with a flange that is bent outward in the vehicle width direction from a front end of an outer surface facing the outside of the vehicle and is joined to the front wall portion, 2. The vehicle side door structure according to claim 1, wherein a lower portion of the flange is disposed on a lower portion of the front wall portion.

3. 3. The vehicle side door structure according to claim 1, wherein the front latch attachment portion has a convex shape that is convex toward the inside of the vehicle relative to the belt line portion and the lower portion of the door inner panel.

4. 4. A vehicle side door structure according to claim 1, wherein the length of the front reinforcement in the vehicle fore-and-aft direction is greater than the length of a front sash provided in the front portion of the door inner panel in the vehicle fore-and-aft direction.

5. 3. The vehicle side door structure according to claim 2, wherein a closed cross-sectional structure is formed by the front wall portion and the main wall portion of the door inner panel and a lower portion of the front reinforcement.

6. A side sill extending in the front-rear direction of the vehicle is provided at the bottom of the door opening provided on the side of the vehicle body, When the vehicle side door is open, 6. The vehicle side door structure according to claim 1, wherein a space is formed between the lower part of the door inner panel and a side sill of the vehicle body side, the space extending continuously in the fore-and-aft direction of the vehicle from the front end to the rear end of the door opening.

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