Vehicular door structure

Abstract

To provide a vehicular door structure in which portions where loads are inputted from a reinforcement member to a door inner panel are dispersed so as to prevent the reinforcement member from peeling off from the reinforcement member.SOLUTION: A vehicular door structure 110, in which a lower end part 121 of a door inner panel 120 of a back door of a vehicle extends horizontally toward a rear side of the vehicle and has a horizontal wall 122 having an opening 122a formed therein, comprises: a reinforcement member 130 mounted on an upper surface of the horizontal wall 122 at the lower end part of the door inner panel to surround the opening 122a; and a door latch mounted on the reinforcement member 130 to block the opening 122a, and engaged with a vehicle body through the opening 122a to keep the back door in a closed state. The reinforcement member 130 has a horizontal latch loading surface part 131 on which the door latch is loaded. An end in a vehicle width direction of the latch loading surface part 131 forms ridge lines 133a and 133b which open in a folding fan-shape toward outside in the vehicle width direction as going to a rear side of the vehicle.SELECTED DRAWING: Figure 4

Description

[Technical field]

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

[0002] For example, Patent Document 1 discloses a vehicle door structure in which the mounting portion of the latch unit of the inner panel is reinforced with a latch reinforcement. The latch reinforcement includes a main body to which the mounting portion of the inner panel is fixed, both ends in the vehicle width direction that are widened with a step on the upper side on the outer side of the main body in the vehicle width direction, and a pair of extensions that are fixed to the outer panel further outside the both ends in the vehicle width direction. In this structure, the latch reinforcement is considered to obtain a predetermined rigidity by bending with the step between the main body and both ends in the vehicle width direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 7210976 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the vehicle door structure of Patent Document 1, when the vehicle back door is closed, a first input load is input to the latch reinforcement toward the rear of the vehicle on a line in the vehicle front-rear direction that passes through the fixed position of the latch, and a second input load is input toward the rear of the vehicle on a line in the vehicle front-rear direction that follows the ridgeline between the main body and both ends in the vehicle width direction. Since the first input load and the second input load are applied in the same direction, the locations where the loads are input are not distributed, and there is a possibility that the latch reinforcement (reinforcement member) will peel off from the inner panel (door inner panel).

[0005] In view of these problems, the present invention aims to provide a vehicle door structure that distributes the points where loads are input from the reinforcing member to the door inner panel, thereby preventing the reinforcing member from peeling off from the door inner panel. [Means for solving the problem]

[0006] In order to solve the above problems, a representative configuration of the present invention is a vehicle door structure comprising a door inner panel that forms the inner surface of a vehicle tailgate, the lower end of the door inner panel having a horizontal wall that extends horizontally toward the rear of the vehicle and has an opening formed therein, the vehicle door structure further comprising a reinforcing member attached to the upper surface of the horizontal wall at the lower end of the door inner panel so as to surround the opening, and a door latch that is attached to the reinforcing member so as to close the opening and engages with the vehicle body through the opening to keep the tailgate closed, the reinforcing member having a horizontal latch mounting surface on which the door latch is mounted, and the vehicle width direction end of the latch mounting surface forming a ridge that opens outward in the vehicle width direction as it approaches the rear of the vehicle. Effect of the Invention

[0007] According to the present invention, the points at which a load is input from the reinforcing member to the door inner panel are dispersed, making it possible to prevent the reinforcing member from peeling off from the door inner panel. [Brief description of the drawings]

[0008] [Figure 1] 1 is a perspective view of a back door to which a vehicle door structure according to an embodiment of the present invention is applied; [Diagram 2] 2 is a perspective view of the vehicle door structure of FIG. 1 as viewed from the rear. [Diagram 3] FIG. 3 is a perspective view showing a part of the vehicle door structure of FIG. 2. [Figure 4] 3 is a perspective view of the vehicle door structure of FIG. 2, as viewed obliquely from the rear. [Diagram 5] 5 is a diagram showing the vehicle door structure as viewed from a direction facing the inclined wall in FIG. 4. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] One embodiment of the present invention is a vehicle door structure comprising a door inner panel that forms the inner surface of a vehicle tailgate, the lower end of the door inner panel having a horizontal wall that extends horizontally toward the rear of the vehicle and has an opening formed therein, the vehicle door structure further comprising a reinforcing member attached to an upper surface of the horizontal wall at the lower end of the door inner panel so as to surround the opening, and a door latch that is attached to the reinforcing member so as to close the opening and engages with the vehicle body through the opening to keep the tailgate closed, the reinforcing member having a horizontal latch mounting surface on which the door latch is mounted, and the vehicle width direction end of the latch mounting surface forms a ridge that opens outward in the vehicle width direction as it approaches the rear of the vehicle.

[0010] According to the present invention, the end of the latch mounting surface of the reinforcing member forms a ridgeline that diverges outward in the vehicle width direction toward the rear of the vehicle, so that when the vehicle back door is closed, the load applied to the latch mounting surface is applied toward the rear of the vehicle on a line in the vehicle front-rear direction that passes through the fixed position of the door latch, as well as toward the rear of the vehicle on a line along the ridgeline. As a result, the points where the load is input from the reinforcing member to the door inner panel are dispersed, making it possible to prevent the reinforcing member from peeling off from the door inner panel.

[0011] The lower end of the door inner panel further has an inclined wall that slopes downward and rearward from the rear end of the horizontal wall, the reinforcing member further has an inclined surface portion that slopes downward and rearward from the rear end of the latch mounting surface portion along the inclined wall, and the vehicle door structure further includes a plurality of first connection portions connecting the inclined surface portion and the inclined wall, the latch mounting surface portion fixes the door latch by a predetermined fixing portion, and the plurality of first connection portions are located on the vehicle width inner side of the ridge in a plan view, and are arranged on both sides of a first imaginary line in the vehicle fore-and-aft direction that passes through the fixing portion.

[0012] According to the above configuration, the multiple first connection portions straddle the first virtual line in the vehicle width direction when viewed in a plan view, thereby preventing the reinforcing member from peeling off from the door inner panel on a line in the fore-and-aft direction of the vehicle that passes through the fixing portion.

[0013] The lower end of the door inner panel further has a vertical wall extending downward from the lower end of the inclined wall, and the reinforcing member further has a flange portion extending downward from the lower end of the inclined surface portion along the vertical wall, and the vehicle door structure further includes a plurality of second connection portions connecting the flange portion and the vertical wall, and the plurality of second connection portions are arranged on both sides of a second imaginary line extending from the ridge line when facing the inclined wall.

[0014] According to the above configuration, the multiple second connection portions straddle the second virtual line in the vehicle width direction when viewed in a plan view or an oblique view from above and rear, thereby preventing the reinforcing member from peeling off from the door inner panel along a line in the direction along the ridge line.

[0015] The reinforcing member further has an outer upward inclined portion extending outward and upward in the vehicle width direction from the ridge line of the latch mounting surface portion, and a bead processed portion formed on the inclined surface portion connecting the outer upper inclined portion and the flange portion, the bead processed portion inclining inward in the vehicle width direction as it extends downward and toward the multiple second connection portions.

[0016] According to the above configuration, since the bead processed portion extends to the multiple second connection portions, the load transmitted to the bead processed portion can be guided to the second connection portion. In addition, the outer upward inclined portion and the bead processed portion give the reinforcing member a three-dimensional shape, improving the rigidity of the reinforcing member.

[0017] The vehicle door structure may further include a weather strip provided on the underside of the horizontal wall at the lower end of the door inner panel around the opening to provide cushioning when the tailgate is closed, and the first connection portion may be positioned so as to rest on the weather strip when the tailgate is closed.

[0018] According to the above configuration, the portion of the door inner panel connected to the reinforcing member by the first connection portion comes into contact with the weather strip, so that the load is distributed through the weather strip, thereby preventing the first connection portion from peeling off.

[0019] The vehicle door structure may further include a garnish extending in the vehicle width direction along the lower edge of the back door.

[0020] According to the above configuration, a garnish extending in the vehicle width direction is provided at the lower end of the tailgate, so that the vertical length of the tailgate is large, and a large opening at the rear of the vehicle through which the tailgate closes can be secured. EXAMPLES

[0021] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The dimensions, materials, and other specific values ​​shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In this specification and drawings, elements having substantially the same functions and configurations are given the same reference numerals to avoid repeated explanations, and elements not directly related to the present invention are not shown.

[0022] Fig. 1 is a perspective view of a back door 100 to which a vehicle door structure 110 according to an embodiment of the present invention is applied. In Fig. 1 and all other drawings, the vehicle front-rear direction is indicated by arrows F (Forward) and B (Backward), the left and right in the vehicle width direction are indicated by arrows L (Leftward) and R (Rightward), and the up-down direction is indicated by arrows U (Upward) and D (Downward).

[0023] The back door 100 shown in FIG. 1 has a door outer panel 101 on the outside and a door inner panel 120 (see FIG. 2) on the inside. The back door 100 also has a garnish 103 extending in the vehicle width direction along its lower edge. The garnish 103 is made of a heavy material. The back door 100 opens and closes an opening at the rear of the vehicle, and the back panel 104 forms the lower edge of the opening. A vehicle door structure 110 is disposed in an area A of the door outer panel 101. In reality, the vehicle door structure 110 is blocked from view by the door outer panel 101, so the area A in FIG. 1 shows the door outer panel 101 in a see-through manner.

[0024] Fig. 2 is a perspective view of the vehicle door structure 110 of Fig. 1 as seen from the rear. Fig. 2 shows a state in which the door outer panel 101 of Fig. 1 has been removed to expose the door inner panel 120. The vehicle door structure 110 shown in Fig. 2 includes the above-mentioned door inner panel 120, a reinforcing member 130 that reinforces a part of the door inner panel 120, and a door latch 180 attached thereto. The reinforcing member 130 and the door latch 180 are present in the space between the door inner panel 120 and the door outer panel 101.

[0025] Fig. 3 is a perspective view showing a part of the vehicle door structure 110 of Fig. 2, and is a view showing a cross section of the reinforcing member 130. As shown in Fig. 3, the door inner panel 120 has a lower end portion 121. The lower end portion 121 has a horizontal wall 122 on the vehicle front side, a surrounding wall 123 on the outer side in the vehicle width direction, an inclined wall 124 behind the horizontal wall 122, and a vertical wall 125 below the inclined wall 124.

[0026] The horizontal wall 122 spreads horizontally. An opening 122a that opens in the vertical direction is formed in the horizontal wall 122. The surrounding wall 123 is inclined so as to rise upward from both ends of the horizontal wall 122 on the outer side in the vehicle width direction on the outer side in the vehicle width direction. The inclined wall 124 is inclined rearward and downward from a rear end 122b of the horizontal wall 122. The vertical wall 125 extends downward from a lower end 124a of the inclined wall 124. Note that the lower edge portion of the vertical wall 125 of the door inner panel 120 is joined to the inside of the lower edge portion of the door outer panel 101 in, for example, the area A in FIG. 1.

[0027] Fig. 4 is a perspective view of the vehicle door structure 110 of Fig. 2, seen obliquely from the rear. As shown in Fig. 4, the reinforcing member 130 is attached to the upper surface of the horizontal wall 122 of the lower end portion 121 of the door inner panel 120 so as to surround the opening 122a. The reinforcing member 130 may be formed to be thicker than the door inner panel 120.

[0028] The reinforcing member 130 has a horizontal latch mounting surface portion 131, step forming portions 132a, 132b adjacent to the latch mounting surface portion 131 on the outer side in the vehicle width direction, and ridge lines 133a, 133b between the latch mounting surface portion 131 and the step forming portions 132a, 132b. A door latch 180 is mounted on the latch mounting surface portion 131 via a latch base 181 (see FIG. 2). The step forming portions 132a, 132b are inclined upward and outward in the vehicle width direction relative to the latch mounting surface portion 131.

[0029] 4, the ridge lines 133a and 133b are boundary lines between the latch mounting surface portion 131 and the step forming portions 132a and 132b, which have different surface orientations. The ridge lines 133a and 133b are formed so that the ends of the latch mounting surface portion 131 in the vehicle width direction open outward in the vehicle width direction in a divergent manner as they approach the rear of the vehicle.

[0030] The shape of the ridgelines 133a and 133b can be expressed as a V-shape or an inverted V-shape when the front of the vehicle is the top and the rear of the vehicle is the bottom. The ridgelines 133a and 133b can also be expressed as ridgelines located immediately outside the position of the door latch 180 on the latch mounting surface portion 131 in the vehicle width direction.

[0031] Further, the reinforcing member 130 has a step forming portion 135 adjacent to the latch mounting surface portion 131 on the vehicle front side, and a boundary line 136 between the latch mounting surface portion 131 and the step forming portion 135. The step forming portion 135 is inclined toward the vehicle front and upward relative to the latch mounting surface portion 131. The boundary line 136 is a boundary line between the latch mounting surface portion 131 and the step forming portion 135, whose surfaces have different orientations. Both ends of the boundary line 136 are connected to the front ends of the ridge lines 133a, 133b.

[0032] Furthermore, the latch mounting surface portion 131 has an opening 137. This opening 137 communicates with the opening 122a of the horizontal wall 122 described above. Furthermore, the latch mounting surface portion 131 has holes 134a, 134b, and 134c for fixing a latch base 181 of the door latch 180. The latch mounting surface portion 131 is spot welded to the horizontal wall 122 at spot welds 138 and 139. The spot welds 138 and 139 refer to the areas to be spot welded.

[0033] The holes 134a to 134c are holes for mounting mounting portions 181a to 181c of a latch base 181 to which the door latch 180 is fixed, onto the latch mounting surface portion 131 by means of fixing portions 182 to 184 (see FIG. 2).

[0034] The reinforcing member 130 has an inclined surface portion 141 that inclines rearward and downward from a rear end 131a of the latch mounting surface portion 131 along the inclined wall 124. The inclined surface portion 141 is spot welded to the inclined wall 124 at first connection portions 142-145.

[0035] The reinforcing member 130 has flange portions 151, 152 extending downward along the vertical wall 125 from the lower end 141a of the inclined surface portion 141. The flange portions 151, 152 are spot welded to the vertical wall 125 at second connection portions 153-158.

[0036] The reinforcing member 130 has outer upward inclined portions 161, 162. The outer upward inclined portions 161, 162 are portions that extend outward and upward in the vehicle width direction beyond the ridge lines 133a, 133b of the latch mounting surface portion 131.

[0037] The reinforcing member 130 has bead processed portions 171, 172. The bead processed portions 171, 172 are formed on the inclined surface portion 141. The bead processed portions 171, 172 are portions that connect the outer upper inclined portions 161, 162 and the flange portions 151, 152. The bead processed portions 171, 172 have a shape that bulges out from the inclined surface portion 141. The bead processed portion 171 is inclined so as to approach the inside in the vehicle width direction as it goes downward, and extends toward the multiple second connection portions 153-155. The bead processed portion 172 is inclined so as to approach the inside in the vehicle width direction as it goes downward, and extends toward the multiple second connection portions 156-158.

[0038] 2, the door latch 180 is attached to the reinforcing member 130 via a latch base 181 so as to close the opening 137. Fixing portions 182-184 are inserted into holes (not shown) and holes 134a-134c in mounting portions 181a-181c of the latch base 181. The door latch 180 is fixed to the latch mounting surface portion 131 by predetermined fixing portions 182-184.

[0039] As a result, the latch base 181 to which the door latch 180 is fixed is fixed to the horizontal wall 122 of the door inner panel 120 via the reinforcing member 130. For example, bolts and nuts are used for the fixing parts 182 to 184. The door latch 180 keeps the back door 100 in a closed state by engaging with a striker 200 shown in Fig. 4, which is fixed to the vehicle body, via the openings 137 and 122a.

[0040] As shown in Fig. 3, the vehicle door structure 110 further includes a weather strip 190. The weather strip 190 is provided on the vehicle body side. The weather strip 190 is provided on the lower surface of the horizontal wall 122 of the lower end portion 121 of the door inner panel 120, around the opening of the vehicle body (for example, inside the upper part of the back panel 104). The weather strip 190 is disposed so as to be placed on the first connecting portions 142-145 when the back door 100 is closed.

[0041] As shown in FIG. 4, the vehicle door structure 110 has flanges 211, 212 that are bent upward from the vehicle front edge of the outer upward inclined portions 161, 162 and bent toward the vehicle rear from the upper edge of the vehicle front side plate portion 191.

[0042] Fig. 5 is a diagram showing the vehicle door structure 110 as viewed from a direction facing the inclined wall 124 in Fig. 4. As shown in Fig. 5, the vehicle door structure 110 includes a plurality of first connection portions 142-145 that connect the inclined surface portion 141 and the inclined wall 124. The plurality of first connection portions 142-145 are located on the inner side in the vehicle width direction of an area sandwiched between lines extending from two ridge lines 133a, 133b in a plan view.

[0043] The first connection portions 142, 143 are disposed on both sides of a first imaginary line L1 in the vehicle front-rear direction that passes through the fixing portions 182, 183 (the positions of the holes 134a, 134b in FIG. 5). A line connecting the first connection portion 142 and the first connection portion 143 straddles the first imaginary line L1. In this embodiment, the distance between the first connection portion 142 and the first imaginary line L1 is set to be the same as the distance between the first connection portion 143 and the first imaginary line L1, but may be set to be different.

[0044] The first connection parts 144, 145 are disposed on both sides of a first imaginary line L2 in the vehicle front-rear direction that passes through the fixing part 184 (the position of the hole 134c in FIG. 5). A line connecting the first connection part 144 and the first connection part 145 crosses the first imaginary line L2. In this embodiment, the distance between the first connection part 144 and the first imaginary line L2 is set to be the same as the distance between the first connection part 145 and the first imaginary line L2, but may be set to be different.

[0045] As shown in FIG. 5, the vehicle door structure 110 further includes a plurality of second connection portions 153 to 158 that connect the flange portions 151 and 152 to the vertical wall 125.

[0046] 5, the second connection portions 153-155 are disposed on both sides of a second imaginary line L3 extending from the ridge line 133a. A line N1 connecting the second connection portions 153 and 155 straddles the second imaginary line L3. The second connection portions 155 are disposed outboard of the first connection portions 142 in the vehicle width direction.

[0047] 5, the second connection portions 156-158 are disposed on both sides of a second imaginary line L4 extending from the ridge line 133b. A line N2 connecting the second connection portions 156 and 158 straddles the second imaginary line L4. The second connection portions 158 are disposed outboard of the first connection portions 144 in the vehicle width direction.

[0048] The lower ends 171a, 172a of the bead processed portions 171, 172 are disposed outward in the vehicle width direction from the second imaginary lines L3, L4. If the lower ends 171a, 172a of the bead processed portions 171, 172 were disposed inward in the vehicle width direction from the second imaginary lines L3, L4, the input load acting along the ridge line 133a would not be borne between the second connecting portions 153-155, and the input load acting along the ridge line 133b would not be borne between the second connecting portions 156-158.

[0049] Next, an action occurring in the vehicle door structure 110 when a user opens and closes the back door 100 will be described with reference to Fig. 5. The back door 100 is repeatedly opened and closed, and a load is concentrated on the edges of the holes 134a to 134c, which are the joints between the reinforcing member 130 and the door inner panel 120.

[0050] At this time, a first load B1 is input along the first virtual line L1. Even if the first load B1 tries to peel the reinforcing member 130 from the door inner panel 120, the position of the first load B1 is contained between the first connecting portion 142 and the first connecting portion 143, so that peeling of the reinforcing member 130 from the door inner panel 120 at the inclined wall 124 is prevented. Note that, even when the first load B2 is input along the first virtual line L2, the first connecting portions 144, 145 produce a similar effect.

[0051] In addition, a second load C1 is input along the second virtual line L3. Even if the second load C1 tries to peel the reinforcing member 130 from the door inner panel 120, the position of the second load C1 is contained between the second connecting portion 153 and the second connecting portion 155, so that peeling of the reinforcing member 130 from the door inner panel 120 at the vertical wall 125 is prevented. Note that, even when the second load C2 is input along the second virtual line L4, the second connecting portions 156-158 have a similar effect.

[0052] Furthermore, the load that reaches the bead processed portion 171 is guided between the second connecting portion 153 and the second connecting portion 155, thereby preventing the inclined surface portion 141 from peeling off from the inclined wall 124. The load that reaches the bead processed portion 172 is guided between the second connecting portion 156 and the second connecting portion 158, thereby preventing the inclined surface portion 141 from peeling off from the inclined wall 124. Furthermore, the occurrence of cracks or deformation in the door inner panel 120 is also prevented.

[0053] According to the configuration of the embodiment described above, since there are ridges 133a and 133b that open outward in the vehicle width direction toward the rear of the vehicle, the load applied to the latch mounting surface portion 131 when the vehicle back door 100 is closed is applied toward the rear of the vehicle on the first imaginary lines L1 and L2 in the vehicle front-rear direction passing through the fixing position of the door latch 180, and is also applied toward the diagonally rear of the vehicle on the second imaginary lines L3 and L4 in the direction along the ridges 133a and 133b. As a result, the points where the load is input from the reinforcing member 130 to the door inner panel 120 are dispersed, and the reinforcing member 130 can be prevented from peeling off from the door inner panel 120. In addition, the points where the load is input from the reinforcing member 130 to the door inner panel 120 are dispersed, and the door inner panel 120 can be prevented from cracking or deforming.

[0054] The multiple first connection portions 142-145 straddle the first imaginary lines L1, L2 in the vehicle width direction as shown in Figure 5, so that it is possible to prevent the inclined surface portion 141 of the reinforcing member 130 from peeling off from the inclined wall 124 of the door inner panel 120 on the first imaginary lines L1, L2 (lines) in the vehicle fore-and-aft direction that pass through the fixing portions 182-184.

[0055] The multiple second connection portions 153-158 straddle the second imaginary lines L3, L4 in the vehicle width direction as shown in Figure 5, so that the flange portions 151, 152 of the reinforcing member 130 can be prevented from peeling off from the vertical wall 125 of the door inner panel 120 on the second imaginary lines L3, L4 (lines) in the direction along the ridge lines 133a, 133b.

[0056] Since the bead processed portion 171 extends to the multiple second connection portions 153-155, the load transmitted to the bead processed portion 171 can be guided to the second connection portions 153-155. Since the bead processed portion 172 extends to the multiple second connection portions 156-158, the load transmitted to the bead processed portion 172 can be guided to the second connection portions 156-158. In addition, the outer upward inclined portions 161, 162 and the bead processed portions 171, 172 give the reinforcing member 130 a three-dimensional shape, and the rigidity of the reinforcing member 130 is improved.

[0057] Since the portions of the door inner panel 120 connected to the reinforcing member 130 by the first connection portions 142-145 come into contact with the weather strip 190, the load is distributed via the weather strip 190, and the first connection portions 142-145 can be prevented from peeling off.

[0058] Since the garnish 103 extending in the vehicle width direction is provided at the lower end of the back door 100, the vertical length of the back door 100 is ensured to be large, and the opening at the rear of the vehicle body through which the back door 100 closes can be ensured to be large.

[0059] Although the preferred embodiment of the present invention has been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to the above-described embodiment. It is clear that a person skilled in the art can think of various modifications or alterations within the scope of the claims, and it is understood that these also naturally belong to the technical scope of the present invention.

[0060] Furthermore, the present invention can be implemented by freely combining the inventions described in the claims and examples, regardless of the dependent relationships of the claims. [Industrial Applicability]

[0061] The present invention can be used in a vehicle door structure. [Explanation of symbols]

[0062] 100...back door, 101...door outer panel, 103...garnish, 104...back panel, 110...vehicle door structure, 120...door inner panel, 121...lower end, 122...horizontal wall, 122a...opening, 122b...rear end, 123...peripheral wall, 124...inclined wall, 124a...lower end, 125...vertical wall, 130...reinforcing member, 131...latch mounting surface portion, 131a...rear end, 132a to 132b...step forming portion, 133a to 133b...ridge line, 134a to 134c...hole, 135...step forming portion, 136...boundary line, 137...opening, 1 38-139...spot welded portion, 141...inclined surface portion, 142-145...first connection portion, 151-152...flange portion, 153-158...second connection portion, 161-162...outer upper inclined portion, 171-172...bead processed portion, 180...door latch, 181...latch base, 181a...mounting portion, 182-184...fixing portion, 190...weather strip, 191...vehicle front side plate portion, 200...striker, 211-212...flange, B1-B2...load, C1-C2...load, L1-L2...first virtual line, L3-L4...second virtual line

Claims

1. A vehicle door structure including a door inner panel that forms an inner surface of a back door of a vehicle, the lower end portion of the door inner panel having a horizontal wall that extends horizontally toward the rear of the vehicle and has an opening formed therein, The vehicle door structure further comprises: a reinforcing member attached to an upper surface of the horizontal wall at the lower end of the door inner panel so as to surround the opening; a door latch that is attached to the reinforcing member so as to close the opening and engages with a vehicle body through the opening to keep the back door in a closed state; The reinforcing member has a horizontal latch mounting surface on which the door latch is mounted, The vehicle door structure is characterized in that the end of the latch mounting surface in the vehicle width direction forms a ridge line that opens outward in the vehicle width direction as it approaches the rear of the vehicle.

2. The lower end of the door inner panel further has an inclined wall inclined downward and rearward from the rear end of the horizontal wall, The reinforcing member further includes an inclined surface portion inclined rearward and downward from a rear end of the latch mounting surface portion along the inclined wall, The vehicle door structure further includes a plurality of first connection portions connecting the inclined surface portion and the inclined wall, The latch mounting surface portion fixes the door latch by a predetermined fixing portion, 2. The vehicle door structure according to claim 1, wherein the first connection portions are located on the vehicle width direction inner side of the ridge line in a plan view and are arranged on both sides of a first imaginary line in the vehicle fore-and-aft direction that passes through the fixing portion.

3. The lower end of the door inner panel further has a vertical wall extending downward from the lower end of the inclined wall, The reinforcing member further includes a flange portion extending downward along the vertical wall from a lower end of the inclined surface portion, The vehicle door structure further includes a plurality of second connection portions connecting the flange portion and the vertical wall, The vehicle door structure according to claim 2 , wherein the second connection portions are arranged on both sides of a second imaginary line that is an extension of the ridge line when facing the inclined wall.

4. The reinforcing member further comprises: an outer upward inclined portion that extends outward and upward in a vehicle width direction from the ridge line of the latch mounting surface portion; a bead processed portion formed on the inclined surface portion and connecting the outer upper inclined portion and the flange portion, 4. The vehicle door structure according to claim 3, wherein the bead processed portion is inclined inward in a vehicle width direction as it extends downward, and extends toward the plurality of second connection portions.

5. The vehicle door structure further includes a weather strip that is provided on the lower surface of the horizontal wall at the lower end of the door inner panel around the opening and that provides cushioning when the back door is closed, The vehicle door structure according to claim 2, wherein the first connection portion is disposed so as to rest on the weather strip when the back door is closed.

6. The vehicle door structure according to claim 1, further comprising a garnish extending in a vehicle width direction along a lower end of the back door.

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