Vehicle door structure

Abstract

To provide a vehicle door structure which can cause a guide rail to follow a door window when force is input to the guide rail in a vehicle width direction in a state that the door window is fully open to inhibit removal of the door window from the guide rail.SOLUTION: A vehicle door structure includes: a front guide rail 28 that holds a door window 18 while allowing raising and lowering operation of the door window 18; and a guide rail support portion 23 that fixes the front guide rail 28 to a door inner panel 20. The guide rail support portion 23 includes: a first section 23A fixed to a door inner panel front face portion 20A; a second section 23B extending rearward from a vehicle-width-direction inner side of the first section 23A; and a third section 23C provided at a rear end portion of the second section 23B and fixed to the front guide rail 28. The second section 23B and the third section 23C are configured to be supported in a cantilever manner with respect to the first section 23A.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a door structure for a vehicle in which a door window (so-called door window glass) for opening and closing a window opening is held on a guide rail so as to be movable up and down. [Background technology]

[0002] Generally, a door window is held by a pair of front and rear guide rails installed inside the door so that it can be raised and lowered. When the door is fully open (stored), a force is applied to the guide rails holding the door window inward in the vehicle width direction when the door is closed, and the door window rebounds outward in the vehicle width direction as a reaction. This rebound load displaces the door window outward in the vehicle width direction, and there is a risk that the door window may come off the guide rails.

[0003] In order to solve such problems, in the past, as disclosed in Patent Document 1, the guide rail and the door inner panel were connected with a connecting member, and when the door was closed, the connecting member suppressed the displacement of the guide rail in the vehicle width direction, thereby preventing the door window from coming off the guide rail.

[0004] However, as the door and door window become larger, the force acting on the guide rail increases when the door is closed, causing the connecting member to flex and deform, resulting in a large rebound amount and the problem of the door window coming off the guide rail. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2020-40445 A Summary of the Invention [Problem to be solved by the invention]

[0006] Therefore, an object of the present invention is to provide a vehicle door structure that can prevent the door window from coming off the guide rail by making the guide rail follow the door window in response to a vehicle width directional input that enters the guide rail when the door window is fully open. [Means for solving the problem]

[0007] The present invention provides a door structure for a vehicle, the door structure comprising: a door inner panel constituting a surface of the door structure for a vehicle facing an interior of the vehicle cabin; a door window for opening and closing a window opening above a belt line portion; a front guide rail for holding the door window while allowing the door window to move up and down; and a guide rail support portion for fixing the front guide rail to the door inner panel, The front guide rail includes a front surface portion extending in a vehicle width direction, an inner surface portion extending in a front-rear direction from an inner end of the front surface portion in the vehicle width direction, and an outer surface portion extending in a front-rear direction from an outer end of the front surface portion in the vehicle width direction, The guide rail support portion includes a first portion fixed to a front portion of the door inner panel, a second portion extending rearward from an inner side of the first portion in a vehicle width direction, and a rear end portion of the second portion. A front surface portion and the inner surface portion and a third part fixed to the first part, wherein the second part and the third part are configured to be cantilevered relative to the first part.

[0008] The above-mentioned guide rail support portion may be formed of a hinge reinforcement. According to this invention, the second and third parts of the guide rail support part are cantilevered relative to the first part fixed to the front part of the door inner panel, and the second part allows deflection deformation in response to a vehicle width direction input that enters the front guide rail when the door window is fully open, allowing the front guide rail to follow the door window. This makes it possible to prevent the door window from coming off the front guide rail.

[0009] The present invention also relates to a vehicle door structure comprising: a door inner panel that constitutes the interior surface of the vehicle door structure; a door window that opens and closes a window opening above a belt line portion; a front guide rail that holds the door window while allowing the door window to be raised and lowered; and a guide rail support portion that fixes the front guide rail to the door inner panel, wherein the guide rail support portion comprises a first portion fixed to a front portion of the door inner panel, a second portion extending rearward from the inside of the first portion in the vehicle width direction, and a third portion provided at a rear end of the second portion and fixed to the front guide rail, and is configured so that the second portion is flexibly deformed in the vehicle width direction.

[0010] According to this invention, the second portion of the guide rail support portion is capable of bending and deforming in the vehicle width direction relative to the first portion fixed to the front portion of the door inner panel, and the second portion allows bending and deformation in response to a vehicle width direction input that enters the front guide rail when the door window is fully open, thereby allowing the front guide rail to follow the door window. This makes it possible to prevent the door window from coming off the front guide rail.

[0011] As an aspect of the present invention, the first portion may be located at a door hinge fixing portion. According to this invention, since the first portion is located at the door hinge fixing portion, the guide rail support portion can be formed by the hinge reinforcement. Therefore, the front guide rail can be supported by the guide rail support portion formed by the hinge reinforcement without providing a separate member for supporting the front guide rail. In other words, the guide rail support portion can support the front guide rail, which has a function of preventing the door window from coming off, and also reinforce the door hinge portion.

[0012] As an aspect of the present invention, the third portion may be disposed so as to overlap with the impact bar in a side view of the vehicle. According to this invention, in the event of a side collision of the vehicle, the impact bar abuts against the front guide rail and the third portion of the guide rail support portion, thereby suppressing stress concentration at the joint between the front end of the impact bar and the door inner panel.

[0013] In detail, the impact bar has the function of absorbing the side impact energy by bending and deforming during a side impact of the vehicle, thereby suppressing deformation of the door, and the function of transmitting the side impact load from the joint of the front end of the impact bar to the door inner panel to the hinge pillar on the vehicle body side, and then transmitting the side impact load to the vehicle body via the hinge pillar.

[0014] If the side impact load is excessive, the impact bar will bend excessively and the above-mentioned joint at the front end of the impact bar will peel off; however, since the third portion overlaps with the impact bar in a side collision, the impact bar will bend and come into contact with the fixed portion between the front guide rail and the third portion, thereby dispersing the stress and preventing stress from concentrating at the above-mentioned joint at the front end of the impact bar.

[0015] As an aspect of the present invention, the third portion may be fixed to a front surface of the front guide rail. According to this invention, the force acting in the vehicle width direction on the front guide rail can be received by the shear surface, thereby improving the strength.

[0016] As an aspect of the present invention, the third portion may be fixed to an inner surface portion or an outer surface portion of the front guide rail. According to this invention, when a load in the vehicle width direction is input to the front guide rail, the load in the vehicle width direction can be smoothly transmitted to the second portion.

[0017] As an embodiment of the present invention, the second portion may be configured as a flat surface. According to the present invention, the second portion, which is flat so as not to increase rigidity, is allowed to flex when a load is input in the vehicle width direction, and thus flexural deformation occurs easily. As a result, the front guide rail can be improved in its ability to follow the door window, and the door window can be further prevented from coming off the front guide rail.

[0018] As an aspect of the present invention, the lower portion of the front guide rail may be joined only to the guide rail support portion. According to the present invention, the lower portion of the front guide rail has a cantilever structure, so that when the door window is fully open and a load is input in the vehicle width direction, the front guide rail can be made to reliably follow the door window. Effect of the Invention

[0019] According to the present invention, it is possible to prevent the door window from coming off the guide rail by making the guide rail follow the door window in response to a vehicle width direction input that enters the guide rail when the door window is fully open. [Brief description of the drawings]

[0020] [Figure 1] FIG. [Diagram 2] FIG. 2 is a side view of the vehicle door structure shown in FIG. 1 with the door outer panel removed. [Diagram 3] 3 is an enlarged side view of a main portion of FIG. 2 with a belt line reinforcement outer and an impact bar removed from FIG. 2; [Figure 4] FIG. [Diagram 5] FIG. 3 is an enlarged cross-sectional view of a main portion taken along line AA in FIG. 2. [Figure 6] FIG. 3 is an enlarged cross-sectional view of a main portion taken along line BB in FIG. 2 . DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] The door structure has a purpose of preventing the door window from coming off the guide rail by making the guide rail follow the door window in response to a vehicle width direction input that enters the guide rail when the door window is fully open, the door structure has a door inner panel that constitutes the surface facing the interior of the vehicle, the door window that opens and closes a window opening above a belt line portion, a front guide rail that holds the door window while allowing the door window to move up and down, and a guide rail support portion that fixes the front guide rail to the door inner panel, The front guide rail includes a front surface portion extending in a vehicle width direction, an inner surface portion extending in a front-rear direction from an inner end of the front surface portion in the vehicle width direction, and an outer surface portion extending in a front-rear direction from an outer end of the front surface portion in the vehicle width direction, The guide rail support portion includes a first portion fixed to a front portion of the door inner panel, a second portion extending rearward from an inner side of the first portion in a vehicle width direction, and a rear end portion of the second portion. A front surface portion and the inner surface portion and a third portion fixed to the first portion, the second portion and the third portion being configured to be cantilevered relative to the first portion. EXAMPLES

[0022] An embodiment of the present invention will now be described in detail with reference to the accompanying drawings. The drawings show a vehicle door structure, with FIG. 1 being an exterior side view showing the vehicle door structure, FIG. 2 being a side view of the vehicle door structure shown in a state where the door outer panel has been removed from FIG. 1, and FIG. 3 being an enlarged side view of the main parts of FIG. 2 shown in a state where the belt line reinforcement outer and the impact bar have been removed from FIG. 2. 4 is a perspective view of the main part when the door window is fully open, FIG. 5 is an enlarged cross-sectional view of the main part taken along line AA in FIG. 2, and FIG. 6 is an enlarged cross-sectional view of the main part taken along line BB in FIG.

[0023] As shown in Figs. 1 and 2, a door 10 (front door) is provided for opening and closing a door opening on the body side. In the illustrated embodiment, only the door 10 on the right side of the vehicle is shown, but the door on the left side of the vehicle is constructed symmetrically to the door 10 on the right side of the vehicle.

[0024] Here, the above-mentioned body-side door opening is an opening surrounded by a hinge pillar extending in the vertical direction at the front of the vehicle body side, a side sill extending in the longitudinal direction of the vehicle at the lower side of the vehicle body side, a front pillar extending in the rear-upper direction from the upper end of the hinge pillar, a roof side rail extending rearward from the rear end of the front pillar, and a center pillar connecting the roof side rail and the side sill in the vertical direction at the midpoint in the longitudinal direction of the vehicle.

[0025] The above-mentioned door 10 includes a door body 11 and a door sash portion 12. The door sash portion 12 includes a front sash portion 12a extending rearward and upward from a front portion of the belt line portion BL at the upper end of the door body 11 along the front pillar and the roof side rail, and a rear sash portion 12b extending vertically from the rear end of the front sash portion 12a along the center pillar.

[0026] A space surrounded by the front sash portion 12a, the rear sash portion 12b, and the belt line portion BL of the door sash portion 12 described above is set as a window opening 13. In addition, a corner bracket 14 is provided at a corner portion between the front lower portion of the front sash portion 12a and the front portion of the belt line portion BL.

[0027] As shown in FIG. 1, the above-mentioned door body 11 includes a door outer handle 15 provided at the rear thereof, a door mirror (not shown) that is abutted against the outer surface of the door outer panel 16 in the vehicle width direction via a door mirror mounting portion 17 provided at the front side near the belt line portion BL of the door outer panel 16, and a door window glass 18 that opens and closes the window opening 13 above the belt line portion BL. In the drawings, the fully closed state of the door window glass 18 is indicated by α, and the fully open state, that is, the stored state, of the door window glass 18 is indicated by β.

[0028] As shown in Fig. 2, the door body 11 is formed by connecting the door inner panel 20, which constitutes the surface on the vehicle interior side, to the door outer panel 16 shown in Fig. 1 by hemming or the like. The door body 11 has a front edge portion 11A to which a door hinge bracket upper 21 and a door hinge bracket lower 22 are attached, a lower edge portion 11B, and a rear edge portion 11C.

[0029] The door inner panel 20 described above has a plurality of openings 20a, 20b, and 20c. In addition, an upper hinge reinforcement 23 and a lower hinge reinforcement 24 serving as guide rail support parts are joined and fixed to the door inner space X (see Figs. 5 and 6) side of the door inner panel 20 at the above-mentioned front edge portion 11A. A latch reinforcement 25 is joined and fixed to the door inner space X side of the door inner panel 20 at the above-mentioned rear edge portion 11C.

[0030] The above-mentioned upper hinge reinforcement 23 is a reinforcing member that improves the supporting rigidity of the door hinge bracket upper 21, and is formed, for example, from an ultra-high tensile steel plate. The above-mentioned lower hinge reinforcement 24 is a reinforcing member that improves the supporting rigidity of the door hinge bracket lower 22. Furthermore, the above-mentioned latch reinforcement 25 is a reinforcing member that improves the supporting rigidity of a latch (not shown).

[0031] In addition, a beltline reinforcement outer 26 (see FIG. 2) and a beltline reinforcement inner 27 (see FIG. 4) are provided extending in the vehicle front-rear direction along the beltline portion BL. The beltline reinforcement outer 26 and the beltline reinforcement inner 27 reinforce the edge of the entrance / exit of the door window glass 18. In particular, the beltline reinforcement outer 26 is a reinforcement that reinforces the upper edge of the door outer panel 16.

[0032] As shown in FIGS. 5 and 6, the front edge 18a of the door window glass 18 is configured so that its upward and downward movement is guided by a front guide rail 28 provided in the door internal space X of the door main body 11. The front guide rail 28 is a guide rail that holds the door window glass 18 while allowing the door window glass 18 to move up and down.

[0033] As shown in Figures 5 and 6, the front guide rail 28 has a front portion 28a extending in the vehicle width direction, an inner side surface portion 28b extending in the fore-and-aft direction on the inside of the vehicle width direction, and an outer side surface portion 28c extending in the fore-and-aft direction on the outside of the vehicle width direction, and is formed into an angular U-shaped cross-section that is open toward the rear of the vehicle.

[0034] A lower majority of the front guide rail 28 is located below the belt line portion BL, and an upper portion of the front guide rail 28 is located above the belt line portion BL. The portion of the front guide rail 28 located below the belt line portion BL is fixed to the door inner panel 20 via an upper hinge reinforcement 23 serving as a guide rail support portion, and the portion of the front guide rail 28 located above the belt line portion BL is fixed to the front sash portion 12a of the door sash portion 12.

[0035] On the other hand, the rear edge of the door window glass 18 is configured so that its lifting and lowering are guided by a rear guide rail 29. This rear guide rail 29 is a guide rail that holds the door window glass 18 while allowing the door window glass 18 to be lifted and lowered.

[0036] An upper majority of the rear guide rail 29 is located above the belt line portion BL, and a lower portion of the rear guide rail 29 is located below the belt line portion BL. A portion of the rear guide rail 29 located above the belt line portion BL is fixed to the rear sash portion 12b of the door sash portion 12, and a portion of the rear guide rail 29 located below the belt line portion BL is fixed to the rear edge portion 11C of the door body 11.

[0037] The door window glass 18 is raised and lowered by a window regulator 30 shown in FIGS. As shown in Figures 2 and 3, the window regulator 30 comprises a pair of front and rear guide rails 31, 32, a carrier plate that slides along the pair of guide rails 31, 32 and to which the door window glass 18 is attached and supported, wrapping portions 33 (however, the drawings only show a portion of the total of four wrapping portions) provided at both the upper and lower ends of the pair of guide rails 31, 32, guide wires 34 that are wrapped across each of the wrapping portions 33 and whose direction is changed at the wrapping portions 33, and an actuator 35 that drives the guide wires 34.

[0038] By driving the actuator 35, the door window glass 18 is configured to move up and down between a fully closed state α shown by a solid line in FIG. 2 and a fully open state β shown by an imaginary line in the same figure. In the door body 11 having the above-mentioned door outer panel 16 (see Figure 1) and door inner panel 20 (see Figure 2), two impact bars 41, 42 extending in the fore-and-aft direction of the vehicle and spaced apart in the up-and-down direction are provided in a slant shape between the front edge portion 11A and the rear edge portion 11C or the lower edge portion 11B.

[0039] The upper impact bar 41 is formed integrally from steel plate with an impact bar main body 41b having multiple beads 41a, 41a (two in this embodiment) extending in the fore-and-aft direction, and flange portions 41c, 41d, 41e, 41f integrally formed at both the front and rear ends of the impact bar main body 41b.

[0040] Flange portions 41e, 41f located at the rear end of the impact bar main body 41b are integrally formed with the impact bar main body 41b so as to be wider in the up-down direction than the impact bar main body 41b. In the impact bar 41, the flange portions 41c, 41d located on the front side are integrally joined to the vertical middle portion of the upper hinge reinforcement 23, and the flange portions 41e, 41f located on the rear side are integrally joined to the door inner panel 20 on the rear edge portion 11C side. The rear end of the impact bar 41 is arranged so as to be inclined backward so as to be located lower than the front end, and the impact bar 41 is arranged so as to be located below the belt line portion BL and the belt line reinforcement outer 26.

[0041] The lower impact bar 42 is formed integrally from steel plate with an impact bar main body 42b having multiple beads 42a, 42a extending in the fore-and-aft direction (two in this embodiment), and flange portions 42c, 42d, 42e, 42f integrally formed at both the front and rear ends of the impact bar main body 42b so as to increase its vertical width and fore-and-aft width.

[0042] The flange portions 42c, 42d located on the front side are integrally joined to the lower part of the upper hinge reinforcement 23 in the vertical direction, and the flange portions 42e, 42f located on the rear side are integrally joined to the door inner panel 20 on the lower side portion 11B side, and the rear end of the impact bar 42 is positioned downward relative to its front end in a rearwardly inclined manner.

[0043] The lower impact bar 42 is located below the upper impact bar 41, and the distance between the rear ends of these upper and lower impact bars 41, 42 is set larger than the distance between the front ends, so that the two impact bars 41, 42 are configured to efficiently absorb side collision loads.

[0044] Here, the above-mentioned upper hinge reinforcement 23 is a reinforcing member which reinforces the location of the door hinge bracket upper 21 and also connects the front end of the beltline reinforcement outer 26, the front end of the upper impact bar 41, and the front end of the lower impact bar 42 in the vertical direction.

[0045] 6, the above-mentioned door hinge bracket upper 21 includes a door-side hinge bracket 51, a body-side hinge bracket 52, and a hinge pin 53 that pivotally supports both the hinge brackets 51, 52. The body-side hinge bracket 52 is fixed to the hinge pillar by a plurality of bolts 54 as fastening members.

[0046] The door side hinge bracket 51 is fastened together with the door inner panel 20, the upper hinge reinforcement 23, and a plate 57 by fastening a nut 56 serving as a fastening member to a bolt 55 on the bracket side. In FIG. 3, reference numeral 58 denotes a mirror reinforcement disposed at a position corresponding to the door mirror mounting portion 17 shown in FIG.

[0047] As shown in Figures 5 and 6, the front portion 20A of the door inner panel 20 includes a front end flange portion 20d, an outer vertical wall portion 20e extending inward in the vehicle width direction from the rear end of the front end flange portion 20d, a stepped-down portion 20f extending rearward from the inner end of the outer vertical wall portion 20e in the vehicle width direction, a front wall portion 20g extending inward in the vehicle width direction from the rear end of the stepped-down portion 20f, an inclined wall portion 20h extending inward from the inner end of the front wall portion 20g in the vehicle width direction toward the rear of the vehicle, and an inner vertical wall portion 20i extending inward in the vehicle width direction from the inner end of the inclined wall portion 20h in the vehicle width direction.

[0048] The upper hinge reinforcement 23 serving as a guide rail support portion for fixing the above-mentioned front guide rail 28 to the door inner panel 20 is constructed as follows. That is, as shown in Figures 5 and 6, the upper hinge reinforcement 23 has a first portion 23A fixed to the front wall portion 20g of the front portion 20A of the door inner panel 20, a second portion 23B extending rearward from the inside of the first portion 23A in the vehicle width direction, and a third portion 23C provided at the rear end of the second portion 23B and fixed to the front guide rail 28.

[0049] The upper hinge reinforcement 23 further includes a fourth portion 23D extending forward from the outer side of the first portion 23A in the vehicle width direction. The fourth portion 23D is fixed to the stepped-down portion 20f of the door inner panel 20 together with the flange portions 41c, 41d of the impact bar 41 by welding.

[0050] Moreover, the second portion 23B and the third portion 23C are configured to be cantilevered relative to the first portion 23A. In other words, the second portion 23B is configured to be flexible and deformable in the vehicle width direction.

[0051] In this way, by making the second portion 23B and the third portion 23C of the upper hinge reinforcement 23, which serves as a guide rail support portion, cantilevered relative to the first portion 23A fixed to the front portion 20A of the door inner panel 20, the second portion 23B is allowed to flex and deform in response to a vehicle width direction input that enters the front guide rail 28 when the door window glass 18 is fully open.

[0052] This allows the front guide rail 28 to follow the displacement of the door window glass 18 in the vehicle width direction, thereby preventing the door window glass 18 from coming off the front guide rail 28.

[0053] In addition, the above-mentioned second portion 23B and third portion 23C are configured to be capable of bending and deforming in the vehicle width direction relative to the first portion 23A, thereby allowing the second portion 23B and the third portion 23C to bend and deform in the vehicle width direction in response to a vehicle width direction input into the front guide rail 28 when the door window glass 18 is fully open (i.e., when stored).

[0054] This allows the front guide rail 28 to follow the displacement of the door window glass 18 in the vehicle width direction, thereby preventing the door window glass 18 from coming off the front guide rail 28.

[0055] Furthermore, the first portion 23A of the upper hinge reinforcement 23 is located at the door hinge fixing portion, that is, the fixing portion of the door hinge bracket upper 21 to which the door-side hinge bracket 51 is fixed.

[0056] In this way, since the first portion 23A is located at the above-mentioned door hinge fixing portion, the guide rail support portion can be formed by the upper hinge reinforcement 23, and the front guide rail 28 is supported by the guide rail support portion formed by the upper hinge reinforcement 23 without providing a separate member for supporting the front guide rail 28.

[0057] In other words, the guide rail support portion is configured to support the front guide rail 28, which has a function of preventing the door window glass 18 from coming off, and to reinforce the door hinge portion.

[0058] As shown in Figs. 2 and 6, the third portion 23C of the upper hinge reinforcement 23 is disposed so as to overlap with the upper impact bar 41 in a side view of the vehicle.

[0059] As a result, in the event of a side collision of the vehicle, the impact bar 41 abuts against the front guide rail 28 and the third portion 23C of the upper hinge reinforcement 23, thereby suppressing the concentration of stress at the joint between the front end of the impact bar 41 and the door inner panel 20 (see flange portions 41c, 41d).

[0060] In detail, the impact bar 41 has the function of absorbing the side impact energy by bending and deforming during a side impact of the vehicle, thereby suppressing deformation of the door 10, and the function of transmitting the side impact load from the joint between the front end of the impact bar 41 and the door inner panel 20 to the hinge pillar on the vehicle body side, and transmitting the side impact load to the vehicle body via the hinge pillar.

[0061] In the case of an excessive side impact load, the impact bar 41 will bend excessively and the joint at the front end of the impact bar 41 will peel off, but since the third portion 23C overlaps with the impact bar 41 in a side view, the impact bar 41 will bend and come into contact with the fixed portion between the front guide rail 28 and the third portion 23C during a side impact, dispersing the stress. This is configured to suppress the concentration of stress at the joint at the front end of the impact bar 41.

[0062] As shown in Figures 5 and 6, the third portion 23C of the upper hinge reinforcement 23 includes a front wall portion 23C1 extending inward in the vehicle width direction from the rear end of the second portion 23B, and an inner wall portion 23C2 extending rearward from the inner end of the front wall portion 23C1 in the vehicle width direction.

[0063] 5 and 6, the front wall portion 23C1 of the third portion 23C is fixed to the front surface 28a of the front guide rail 28. As a result, the front wall portion 23C1 is formed to receive the vehicle width direction input that enters the front guide rail 28 at the shear surface, thereby improving the strength.

[0064] 5 and 6, the inner wall portion 23C2 of the third portion 23C is fixed to the inner side surface portion 28b of the front guide rail 28. This allows the load in the vehicle width direction to be smoothly transmitted to the second portion 23B when the load in the vehicle width direction is input to the front guide rail 28.

[0065] As shown in Figs. 3 and 4, the second portion 23B, in particular the lower half thereof, is configured as a flat surface. In this way, the second portion 23B, which is flat so as not to increase rigidity, is allowed to flex when a load is input in the vehicle width direction, and flex deformation occurs easily. As a result, the front guide rail 28 is configured to improve the ability to follow the door window glass 18, and the door window glass 18 is further prevented from coming off the front guide rail 28.

[0066] As shown in FIG. 3, the upper portion of the front guide rail 28 is joined to the corner bracket 14, while the lower portion of the front guide rail 28 is joined only to the upper hinge reinforcement 23 serving as a guide rail support portion, and the lower end portion 28d of the front guide rail 28 is set as a non-joint portion that is not joined to any member.

[0067] In this way, by joining the lower part of the front guide rail 28 only to the upper hinge reinforcement 23, the lower part of the front guide rail 28 has a cantilever structure, and is configured to ensure that the front guide rail 28 follows the door window glass 18 when a load in the vehicle width direction is input when the door window glass 18 is fully open. In the figure, arrow F indicates the front of the vehicle, arrow R indicates the rear of the vehicle, arrow IN indicates the inside in the vehicle width direction, arrow OUT indicates the outside in the vehicle width direction, and arrow UP indicates the top of the vehicle.

[0068] As described above, the vehicle door structure according to this embodiment includes the door inner panel 20 that constitutes the surface of the vehicle door structure facing the interior of the vehicle, the door window glass 18 that opens and closes the window opening 13 above the belt line portion BL, the front guide rail 28 that holds the door window glass 18 while allowing the door window glass 18 to move up and down, and the guide rail support portion (upper hinge reinforcement 23) that fixes the front guide rail 28 to the door inner panel 20. The guide rail support portion (upper hinge reinforcement 23) comprises a first portion 23A fixed to the front portion 20A of the door inner panel 20, a second portion 23B extending rearward from the inside of the first portion 23A in the vehicle width direction, and a third portion 23C provided at the rear end portion of the second portion 23B and fixed to the front guide rail 28, and is characterized in that the second portion 23B and the third portion 23C are configured to be cantilevered relative to the first portion 23A (see Figures 2, 5 and 6).

[0069] According to such a vehicle door structure, the second portion 23B and the third portion 23C of the guide rail support portion (upper hinge reinforcement 23) are in a cantilever state with respect to the first portion 23A fixed to the front portion 20A of the door inner panel 20, and the second portion 23B allows bending deformation in response to a vehicle width direction input that enters the front guide rail 28 when the door window glass 18 is fully opened, thereby allowing the front guide rail 28 to follow the door window glass 18. This makes it possible to prevent the door window glass 18 from coming off the front guide rail 28.

[0070] The vehicle door structure according to this embodiment also includes a door inner panel 20 that constitutes the surface of the vehicle door structure facing the interior of the vehicle cabin, a door window glass 18 that opens and closes a window opening 13 above a belt line portion BL, a front guide rail 28 that holds the door window glass 18 while allowing the door window glass 18 to move up and down, and a guide rail support portion (upper hinge reinforcement 23) that fixes the front guide rail 28 to the door inner panel 20. , and the guide rail support portion (upper hinge reinforcement 23) comprises a first portion 23A fixed to the front portion 20A of the door inner panel 20, a second portion 23B extending rearward from the inside of the first portion 23A in the vehicle width direction, and a third portion 23C provided at the rear end of the second portion 23B and fixed to the front guide rail 28, and is characterized in that the second portion 23B is configured to be flexibly deformable in the vehicle width direction (see Figures 2, 5 and 6).

[0071] According to such a vehicle door structure, the second portion 23B of the guide rail support portion (upper hinge reinforcement 23) is capable of bending and deforming in the vehicle width direction relative to the first portion 23A fixed to the front portion 20A of the door inner panel 20, and the second portion 23B allows bending and deformation in response to a vehicle width direction input that enters the front guide rail 28 when the door window glass 18 is fully opened, thereby allowing the front guide rail 28 to follow the door window glass 18. This makes it possible to prevent the door window glass 18 from coming off the front guide rail 28.

[0072] In addition, in this vehicle door structure, the first portion 23A is located at the door hinge fixing portion (see the portion of the door hinge bracket upper 21 where the door side hinge bracket 51 is fixed) (see FIG. 6).

[0073] According to such a vehicle door structure, since the first portion 23A is located at the door hinge fixing portion, the guide rail support portion can be formed by the hinge reinforcement (upper hinge reinforcement 23). Therefore, the front guide rail 28 can be supported by the guide rail support portion formed by the hinge reinforcement (upper hinge reinforcement 23) without providing a separate member for supporting the front guide rail 28.

[0074] In other words, the guide rail support portion can support the front guide rail 28, which has a function of preventing the door window glass 18 from coming off, and also reinforce the door hinge portion.

[0075] Furthermore, in this vehicle door structure, the third portion 23C is disposed so as to overlap with the impact bar 41 in a side view of the vehicle (see Figs. 2 and 6). According to such a vehicle door structure, in the event of a side collision of the vehicle, the impact bar 41 abuts against the front guide rail 28 and the third portion 23C of the guide rail support portion (upper hinge reinforcement 23), thereby suppressing the concentration of stress at the joint portion (see flange portions 41c, 41d) between the front end portion of the impact bar 41 and the door inner panel 20.

[0076] In detail, the impact bar 41 has the function of absorbing the side impact energy by bending and deforming during a side impact of the vehicle, thereby suppressing deformation of the door 10, and the function of transmitting the side impact load from the joint of the front end of the impact bar 41 to the door inner panel 20 to the hinge pillar on the vehicle body side, and transmitting the side impact load to the vehicle body via the hinge pillar.

[0077] If the side impact load is excessive, the impact bar 41 will bend excessively and the above-mentioned joint at the front end of the impact bar 41 will peel off; however, since the third portion 23C overlaps with the impact bar 41 in a side collision, the impact bar 41 will bend and come into contact with the fixed portion between the front guide rail 28 and the third portion 23C, thereby dispersing the stress and preventing the concentration of stress at the above-mentioned joint at the front end of the impact bar 41.

[0078] Furthermore, in this vehicle door structure, the third portion 23C is fixed to the front surface 28a of the front guide rail 28 (see Figs. 5 and 6). According to such a vehicle door structure, the vehicle width direction input entering the front guide rail 28 can be received by the shear surface, thereby improving the strength.

[0079] In addition, in such a vehicle door structure, the third portion 23C is fixed to the inner surface portion 28b or the outer surface portion 28c (in the above embodiment, the inner surface portion 28b) of the front guide rail 28 (see Figures 5 and 6). According to such a vehicle door structure, when a load in the vehicle width direction is input to the front guide rail 28, the load in the vehicle width direction can be smoothly transmitted to the second portion 23B.

[0080] In addition, in this vehicle door structure, the second portion 23B is configured as a flat surface (see Figs. 3 and 4). According to this vehicle door structure, the second portion 23B, which is flat so as not to increase rigidity, is allowed to flex when a load is input in the vehicle width direction, and thus flexural deformation occurs easily. As a result, the front guide rail 28 can be improved in conformity with the door window glass 18, and the door window glass 18 can be further prevented from coming off the front guide rail 28.

[0081] Furthermore, in this vehicle door structure, the lower portion of the front guide rail 28 is joined only to the guide rail support portion (upper hinge reinforcement 23) (see FIG. 3). According to such a vehicle door structure, the lower part of the front guide rail 28 has a cantilever structure, so that when the door window glass 18 is fully open and a load is input in the vehicle width direction, the front guide rail 28 can be made to reliably follow the door window glass 18.

[0082] In the configuration of the present invention and the above-mentioned embodiment, The door of the present invention corresponds to the door 10 (front door) of the embodiment. Similarly, The window opening corresponds to the window opening 13; The door windows are compatible with Door Window Glass 18. The door inner panel is compatible with the door inner panel 20. The front part of the door inner panel corresponds to the front part of the door inner panel 20A. The guide rail support corresponds to the upper hinge reinforcement 23, The first portion corresponds to the first portion 23A, The second portion corresponds to the second portion 23B, the third site corresponds to third site 23C; The front guide rail corresponds to the front guide rail 28, The front portion of the front guide rail corresponds to the front portion 28a, The inner surface portion of the front guide rail corresponds to the inner surface portion 28b, The outer surface of the front guide rail corresponds to the outer surface 28c. The impact bar is compatible with the Impact Bar 41. The door hinge fixing portion corresponds to the fixing portion of the door side hinge bracket 51 of the door hinge bracket upper 21, The belt line part corresponds to the belt line part BL, The present invention is not limited to the above-described embodiment, but may be practiced in many different ways.

[0083] For example, in the above embodiment, the vehicle door structure is applied to the front door on the right side of the vehicle, but the vehicle door structure of the present invention may be applied to the front door on the left side of the vehicle or the left and right rear doors. Further, in the above embodiment, the vehicle door structure is applied to a door structure having the door sash portion 12, but this may also be adopted to a sashless door structure. [Industrial Applicability]

[0084] As described above, the present invention is useful for a vehicle door structure including a door inner panel that constitutes the interior surface of the vehicle door structure, a door window that opens and closes a window opening above a belt line portion, a front guide rail that holds the door window while allowing the door window to be raised and lowered, and a guide rail support portion that fixes the front guide rail to the door inner panel. [Explanation of symbols]

[0085] 10…Door 13…Window opening 18…Door window glass (door window) 20…Door inner panel 20A…Front part of inner door panel 23...Upper hinge reinforcement (guide rail support part) 23A…First part 23B…Second part 23C…3rd part 28…Front guide rail 28a...Front part 28b…Inner side part 28c…Outer surface part 41…Impact bar BL: Belt line section

Claims

1. a door inner panel that constitutes a surface of the vehicle door structure facing the interior of the vehicle; a door window that opens and closes a window opening above a belt line; a front guide rail that holds the door window while allowing the door window to move up and down; a guide rail support portion that fixes the front guide rail to the door inner panel, The guide rail support portion includes a first portion fixed to a front surface portion of the door inner panel; a second portion extending rearward from an inner side of the first portion in the vehicle width direction; a third section provided at a rear end of the second section and fixed to the front guide rail, The second section and the third section are configured to be cantilevered relative to the first section. Vehicle door structure.

2. a door inner panel that constitutes a surface of the vehicle door structure facing the interior of the vehicle; a door window that opens and closes a window opening above a belt line; a front guide rail that holds the door window while allowing the door window to move up and down; a guide rail support portion that fixes the front guide rail to the door inner panel, The guide rail support portion includes a first portion fixed to a front surface portion of the door inner panel; a second portion extending rearward from an inner side of the first portion in the vehicle width direction; a third section provided at a rear end of the second section and fixed to the front guide rail, The second portion is configured to be flexible and deformable in the vehicle width direction. Vehicle door structure.

3. The first portion is located at the door hinge fixing portion. The vehicle door structure according to claim 1.

4. The third part is positioned so that it overlaps with the impact bar when viewed from the side of the vehicle. The vehicle door structure according to claim 1 or 3.

5. The third portion is fixed to the front surface of the front guide rail. The vehicle door structure according to claim 1.

6. The third portion is fixed to the inner or outer surface of the front guide rail. The vehicle door structure according to claim 1 or 5.

7. The second portion is composed of a plane. The vehicle door structure according to claim 1 or 2.

8. The lower part of the front guide rail is joined only to the guide rail support part. The vehicle door structure according to claim 1 or 2.

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