Vehicle and rear door

Abstract

The present invention relates to a vehicle and a back door. The back door is installed at the rear of a vehicle body, and is equipped with an inner panel and an outer panel arranged opposite to the inner panel, and is equipped with a first reinforcement member and a second reinforcement member, wherein the first reinforcement member overlaps the outer side of the vehicle body and is fixed to the inner panel together with a hinge, and the second reinforcement member includes a porous portion and is arranged to fill a first space between the first reinforcement member and the outer panel at a position closer to the outer side in the vehicle body width direction than a hinge support portion supporting the hinge, overlapping with at least a portion of the upper edge of the rear window glass.

Description

Technical Field

[0001] The technology disclosed in this specification relates to a vehicle and a tailgate installed at the rear of the vehicle body. Background Art

[0002] Japanese Patent Application Laid-Open No. 2011-131784 discloses a vehicle. The vehicle is provided with a vehicle body with an opening at the rear, and a back door for opening and closing the opening. The back door is connected to the vehicle body via a pair of rotatable left and right hinges. A load is applied to the corner of the back door including the hinge when the back door is opened and closed. Therefore, a reinforcing member is provided for reinforcing the portion (Japanese Patent Application Laid-Open No. 2011-131784). Summary of the invention

[0003] In such a back door, there is a case where the inclination is made gentle from the viewpoint of reducing aerodynamic drag or improving appearance design. In this case, as a result, a large rear window glass is maintained. In the case of maintaining a large rear window glass, it is required to further improve the rigidity. This specification provides a technology for efficiently improving the rigidity of a back door in a vehicle equipped with a back door.

[0004] This specification discloses a vehicle. The vehicle is equipped with a vehicle body and a back door installed at the rear of the vehicle body. The back door is equipped with a rear window glass, a door panel, a hinge, a first reinforcing member and a second reinforcing member. The door panel has: an inner panel, which is arranged on the inner side of the vehicle body; and an outer panel, which is arranged on the outer side of the vehicle body, and the rear window glass is installed on the outer panel, and the inner panel and the outer panel are respectively equipped with an upper side portion, a side side portion and a lower side portion, which define the opening end edge of the rear window glass. The hinge is fixed to the upper side portion of the inner panel, and the back door is rotatably connected to the vehicle body.

[0005] The first reinforcing member overlaps with the outer side of the inner panel of the vehicle body and is fixed to the inner panel together with the hinge, and has the following shape: starting from the hinge supporting part that supports the hinge fixed to the inner panel, it extends on the lower side in the up-down direction of the vehicle body within the range overlapping with the upper edge of the glass serving as the upper edge of the rear window glass, and extends on the outer side in the width direction of the vehicle body within the range up to the side edge.

[0006] The second reinforcement member includes a porous portion and is arranged to overlap at least a portion of the upper edge of the glass and fill a first space between the first reinforcement member and the outer panel at the outer side in the vehicle body width direction relative to the hinge support portion.

[0007] In the above-mentioned back door, the second reinforcing member is configured to overlap with at least a portion of the upper edge of the glass and fill the first space formed between the first reinforcing member and the outer panel on the outer side of the hinge support portion in the vehicle body width direction. In this way, the rigidity of the portion corresponding to the outer side of the hinge support portion in the door panel and the upper edge of the glass of the back door can be improved. The inventors of the present invention have recognized that the outer side of the hinge support portion and the upper edge of the glass are likely to become the base points for the bending deformation of the back door. According to the above-mentioned structure, since the outer side of the hinge support portion and the periphery of the upper edge of the glass are reinforced by the first reinforcing member and the second reinforcing member, a vehicle can be provided, which has a back door that suppresses or avoids the bending deformation of the corner including the outer side of the hinge support portion and the upper edge of the glass, and has improved rigidity.

[0008] A back door installed at the rear of a vehicle body in another embodiment of the present specification is provided with a door panel, a hinge, a first reinforcing member and a second reinforcing member. The door panel comprises: an inner panel, which is arranged on the inner side of the vehicle body; and an outer panel, which is arranged on the outer side of the vehicle body, and a rear window glass is installed on the outer panel. The inner panel and the outer panel are respectively provided with an upper side portion, a side side portion and a lower side portion, which define the opening edge of the rear window glass. A hinge is fixed to the upper side portion of the inner panel, and the back door is rotatably connected to the vehicle body. The first reinforcing member overlaps with the outer side of the vehicle body of the inner panel, is fixed to the inner panel together with the hinge, and has the following shape: from the hinge support portion that supports the hinge fixed to the inner panel, on the lower side in the up-down direction of the vehicle body, extends within the range overlapping with the upper edge of the glass as the upper edge of the rear window glass, and on the outer side in the width direction of the vehicle body, extends within the range up to the side edge portion. The second reinforcement member includes a porous portion and is arranged to fill between the first reinforcement member and the outer panel at a position further outward in the vehicle body width direction than the hinge support portion so as to overlap with at least a portion of the upper edge of the glass. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Hereinafter, features, advantages, technical and industrial significance of exemplary embodiments of the present invention will be described with reference to the accompanying drawings, in which like reference numerals denote like components, wherein:

[0010] Figure 1 It is a diagram schematically showing a vehicle.

[0011] Figure 2A This is the overall picture of the car's rear door.

[0012] Figure 2B This is an exploded view of the upper and lower parts of the vehicle body near the back door.

[0013] Figure 2C This is another exploded view of the vicinity of the upper side of the vehicle body in the up-down direction of the back door.

[0014] Figure 3 This is a diagram showing an enlarged view of a corner of a back door.

[0015] Figure 4 Yes means Figure 3 FIG. 5 is a cross-sectional view of section IV-IV.

[0016] Figure 5A This is an enlarged view of the porous reinforcing member.

[0017] Figure 5B Yes means Figure 5A FIG. 5 is a cross-sectional view of the VB-VB portion.

[0018] Figure 6 The figures show the porous reinforcing member before and after foaming. DETAILED DESCRIPTION

[0019] One embodiment of the present technology is equipped with: a vehicle body and a tailgate installed at the rear of the vehicle body. The tailgate is equipped with: a rear window glass, a door panel, a hinge, a first reinforcing member and a second reinforcing member, and the first reinforcing member and the second reinforcing member have the structure already described. By doing so, even a rear window glass with a wide area or a large mass, or a rear window glass with a gentle inclination, can be reliably held by the door panel. In addition, by doing so, the cross-sectional area of ​​the closed cross-sectional space of the door panel can also be reduced. For example, a space for installing equipment such as a high-mounted brake light on the inner side of the vehicle body can be formed on the upper edge of the door panel.

[0020] In one embodiment of the present technology, the second reinforcing member may also be arranged to intersect a line passing through the inner bending point and the outer bending point of the corner between the upper edge and the side edge of the door panel. By doing so, torsional deformation at the corner of the back door can be effectively suppressed or avoided.

[0021] In one embodiment of the present technology, the inner panel, the first reinforcing member and the outer panel may also have at least one joint point at the inner edge of the corner, wherein the inner edge of the corner includes the inner bending point of the corner between the upper edge and the side edge of the door panel. By doing so, the torsional deformation at the corner of the back door can be effectively suppressed or avoided.

[0022] In one embodiment of the present technology, the second reinforcing member can also be configured to overlap with the upper edge of the glass and fill the second space between the inner panel and the outer panel near the junction of the inner panel and the outer panel on the outside of the vehicle body width direction. By doing so, the second reinforcing member can effectively increase the rigidity of the corner.

[0023] In one embodiment of the present technology, the second reinforcing member may also be configured to continuously overlap and fill the upper edge of the glass from the outer side of the hinge support in the vehicle body width direction to the junction of the inner panel and the outer panel in the vehicle body width direction. By doing so, the second reinforcing member can more effectively improve the rigidity of the corner.

[0024] In one embodiment of the present technology, the second reinforcement member may be joined to the vehicle body outer side surface of the first reinforcement member and the vehicle body inner side surface of the outer panel. In this way, the second reinforcement member can effectively improve the rigidity of the corner portion.

[0025] In one embodiment of the present technology, the second reinforcement member may be joined to the inner peripheral surface near the joining portion of the inner panel and the outer panel on the outer side in the vehicle body width direction. In this way, the second reinforcement member can effectively improve the rigidity of the corner portion.

[0026] In one embodiment of the present technology, the second reinforcing member may overlap at least a portion of the upper edge of the glass and have a non-porous portion in addition to the porous portion. This can increase the degree of freedom in adjusting the rigidity of the second reinforcing member.

[0027] In one embodiment of the present technology, the second reinforcing member can also be generated by on-site foaming and integrated with the door panel. By doing so, the second reinforcing member fills the space by foaming and is bonded to the inner surface of the space. Thus, the second reinforcing member is simply and firmly integrated with the door panel.

[0028] In one embodiment of the present technology, the cross-sectional area of ​​the closed cross-sectional space of the upper edge of the inner panel and the outer panel can also be minimized in the central portion in the width direction of the vehicle body. Since the first and second reinforcing members are used to give sufficient rigidity to the corner portion including the upper edge of the inner panel and the outer side of the hinge support portion, for example, a high-mounted brake light can be installed in the central portion.

[0029] One embodiment of the present technology may also be a back door installed at the rear of the vehicle body. The back door includes a door panel, a hinge, a first reinforcing member and a second reinforcing member. These components may have the same form as the corresponding components in the vehicle already described. According to the above structure, since the upper edge of the glass outside the hinge support portion is reinforced by the first reinforcing member and the second reinforcing member, it is possible to provide a device capable of suppressing or avoiding bending deformation at the side portion of the door panel and the upper edge of the installed rear window glass.

[0030] In one embodiment of the present technology, the rear window glass may be attached to the opening end edge.

[0031] In addition, the back door is usually equipped with a pair of left and right hinges, a pair of left and right first reinforcement members, and a pair of left and right second reinforcement members. As an embodiment of the present technology, it is sufficient to be equipped with at least one of the left and right first reinforcement members and a second reinforcement member corresponding to the first reinforcement member.

[0032] Hereinafter, a vehicle will be described as an embodiment of the present technology. The vehicle 10 described in the following drawings is an electric vehicle, and a tailgate 14 is provided at the rear of the vehicle body 12. In addition, the direction FR in the drawings indicates the front in the front-rear direction of the vehicle body 12, and the direction RR indicates the rear in the front-rear direction of the vehicle body 12. In addition, the direction LH indicates the left in the width direction of the vehicle body, and the direction RH indicates the right in the width direction of the vehicle body 12. Furthermore, the direction UP indicates the upper part in the up-down direction of the vehicle body 12, and the direction DW indicates the lower part in the up-down direction of the vehicle body 12. In addition, in this specification, the front-rear direction of the vehicle body 12, the width direction of the vehicle body 12, and the up-down direction of the vehicle body 12 are sometimes simply referred to as the front-rear direction, the width direction, and the up-down direction, respectively.

[0033] Reference Figure 1 to Figure 6 , the vehicle 10 will be described. Figure 1 As shown, the vehicle 10 is equipped with a body 12 and a back door 14. There is no particular limitation on the body 12, and it can be made of steel or aluminum alloy. A luggage compartment space 12a is provided at the rear of the body 12, and a back door opening 12b is provided that opens to the rear. The back door 14 is a movable member for opening or closing the back door opening 12b.

[0034] (Door panel)

[0035] like Figure 2A to Figure 2C As shown, the back door 14 is equipped with a door panel 20. The door panel 20 is equipped with an inner panel 22 arranged on the inner side (trunk space 12a side) of the vehicle body 12, and an outer panel 24 arranged on the outer side of the vehicle body 12. The inner panel 22 and the outer panel 24 each have a substantially square outer periphery, and have an upper side 26, side sides 28a, 28b, and a lower side 30. The inner periphery of the upper side 26, side sides 28a, 28b, and lower side 30 of the inner panel 22 and the outer panel 24 defines an opening end edge 32 for mounting a rear window glass 40.

[0036] The inner panel 22 and the outer panel 24 are joined together at their opposite ends by welding or the like, and the two form a closed cross-sectional space substantially entirely on the inner sides thereof, thereby imparting rigidity to the entire door panel 20. Figure 2A to Figure 2CIn the embodiment shown, the widthwise center of the upper side 26 of the inner panel 22 and the outer panel 24 is concave upward in the vertical direction in order to mount the high mounted stop lamp 80. Therefore, the cross-sectional area of ​​the closed cross-sectional space at the upper side 26 where the high mounted stop lamp 80 is mounted is the smallest.

[0037] (Rear window glass)

[0038] The back door 14 is not particularly limited, and for example, a rear window glass 40 may be attached to the opening edge 32 using an adhesive. The rear window glass 40 is attached to the vehicle body outer side of the outer panel 24. The rear window glass 40 is attached to the upper and lower edges of the opening edge 32 of the door panel 20 and covers substantially the entire width of the side edge portions 28a, 28b.

[0039] Although not shown in the drawings, the rear window glass 40 thus mounted, the portions located on the upper edge 26, the side edges 28a, 28b and the lower edge 30 of the door panel 20 are covered by a resin exterior panel or a sealant.

[0040] (Hinge)

[0041] like Figure 2A to Figure 2C and Figure 3 As shown, the back door 14 is mounted to the vehicle body 12 by a pair of left and right hinges 50. In the back door 14, the hinges 50 are mounted to the upper side 26 of the door panel 20. The hinges 50 connect the back door 14 to the upper part of the vehicle body 12 so as to be rotatable.

[0042] like Figure 4 As shown, the hinge 50 is provided with a hinge mounting portion 52 and a hinge arm 54. The hinge mounting portion 52 is fixed to a predetermined position near the back door opening 12b of the vehicle body 12. There is no particular limitation on the hinge arm 54, and it can be configured as a plate-like body having a predetermined width and cross-section in the width direction. The hinge arm 54 is configured to rotate with the hinge mounting portion 52 as a base.

[0043] The inner panel 22 has a hinge support portion 56 that fastens and supports the rotation end of the hinge arm 54. The hinge support portion 56 is formed by fastening the end (rotation end) of the hinge arm 54 on the opposite side of the hinge mounting portion 52 to the back surface of the inner panel 22 using a bolt 55. The hinge support portion 56 is formed at a predetermined position on the upper side in the up-down direction and on the outer side in the width direction of the upper side portion 26 of the inner panel 22.

[0044] (Hinge reinforcement)

[0045] like Figure 2A to Figure 2C and Figure 3As shown in FIG. 1 , the inner panel 22 has a hinge reinforcement member 60 at the corner 27 between the upper side 26 and the side sides 28a and 28b. The hinge reinforcement member 60 includes a hinge support portion 56 of the inner panel 22, and is formed into a generally plate-shaped body that covers substantially the entire corner 27 of the inner panel 22 but is received within the inner panel 22. More specifically, the hinge reinforcement member 60 includes a hinge support portion 56 (a portion located on the back side of the inner panel 22 but corresponding to the surface side thereof), and a hinge reinforcement member 60 is provided on the lower side ( Figure 3 The downward arrow C in FIG. 1 is beyond the upper edge 42 where the rear window glass 40 is installed, and reaches the upper edge of the opening edge 32 of the inner panel 22. In addition, the hinge reinforcement member 60 is located on the outer side in the width direction ( Figure 3 The hinge reinforcement member 60 (in the figure) reaches the outer peripheral edge of the side edge 28b of the inner panel 22. In addition, the hinge reinforcement member 60 has an inner edge 64 along the corner 32a of the opening edge 32 of the inner panel 22. The hinge reinforcement member 60 is an example of the first reinforcement member disclosed in this specification.

[0046] like Figure 4 As shown in FIG. 1 , the hinge reinforcement member 60 is formed into a plate-like body of a predetermined shape that is appropriately bent. The hinge reinforcement member 60 is fixed to the hinge support portion 56 of the inner panel 22 by the bolt 55 that fastens the hinge arm 54. In addition, the end edge of the hinge reinforcement member 60 along the outer peripheral edge of the upper side portion 26 of the inner panel 22 is joined to the surface of the inner panel 22.

[0047] Furthermore, the inner edge 64 of the hinge reinforcement member 60 is spot welded to the inner panel 22 and the outer panel 24 at the opening edge 32. That is, the inner edge 64 of the hinge reinforcement member 60 is spot welded at the inner bending point W1 of the corner 32a of the opening edge 32 of each of the inner panel 22 and the outer panel 24 and at both sides thereof, at the point W2 along the opening edge 32 of the upper side portion 26 and at the point W3 along the opening edge of the side portion 28b.

[0048] In addition, the outer peripheral edges of the upper side portion 26 , the corner portion 27 , and the side portion 28 b (or 28 a ) of the door panel 20 in which the hinge reinforcement member 60 is provided are joined to each other by welding.

[0049] like Figure 4 and Figure 5B As shown, the hinge reinforcement member 60 forms a cross-sectional space S1 between its surface 60a and the inner surface 24a located on the vehicle body inner side of the outer panel 24, and the cross-sectional space S1 is a part of the closed cross-sectional space formed by the outer panel 24. By having the cross-sectional space S1, the range from the hinge support portion 56 to the side edge portion 28b of the door panel 20 is reinforced. The cross-sectional space S1 is an example of the first space disclosed in this specification.

[0050] In addition, the state of the porous reinforcing member 70 near the hinge reinforcing member 60 is shown in FIG. Figure 5B .like Figure 5B As shown, the cross-sectional area of ​​the space side outside the hinge support portion 56 in the width direction in the cross-sectional space S1 is formed larger than the space near the center in the width direction from the hinge support portion 56. In addition, a cross-sectional space S2 is formed near the porous reinforcing member 70, outside the outer edge 62 of the hinge reinforcing member 60 in the width direction. The cross-sectional space S2 is formed between the surface of the inner plate 22 and the inner surface 24a of the outer plate 24 near the junction between the inner plate 22 and the outer plate 24. The cross-sectional space S2 is an example of the second space disclosed in this specification.

[0051] (Porous reinforcement member)

[0052] like Figure 3 to Figure 5B As shown, the porous reinforcing member 70 is provided in a part of the cross-sectional space S1 formed between the hinge reinforcing member 60 and the outer plate 24. The porous reinforcing member 70 is formed to include a porous portion 72 and to exert high rigidity. In addition, here, the so-called "porous" refers to the state of a matrix having a plurality of holes as communicating holes and / or independent holes randomly distributed in three dimensions as a whole, and the so-called "porous portion" refers to the portion having such a matrix. On the other hand, the so-called "non-porous" refers to the state of a matrix having no such holes and having a substantially solid shape, and the so-called "non-porous portion" refers to the portion having such a matrix.

[0053] like Figure 2A to Figure 6 As shown in FIG. 1 , when the door panel 20 is viewed from the rear in the front-rear direction, the porous reinforcing member 70 as a whole has a long strip shape extending in the width direction. Figure 5B As shown, the porous reinforcing member 70 has a porous portion 72 and a non-porous portion 74 .

[0054] like Figure 5B As shown in the figure, the porous part 72 is the main structural element of the porous reinforcing member 70. The porous part 72 is composed of polypropylene rubber foamed by heating. In addition, as the foam body, a known foam material capable of exerting high rigidity can be appropriately adopted. Although there is no specific restriction, for example, it is foam rubber, foam plastic, among which, hard polyurethane foam, polystyrene foam, polyethylene foam, polypropylene foam, EVA cross-linked foam, PET resin foam, phenolic foam, silicone foam, polyvinyl chloride foam, urea resin foam, acrylic foam, polyimide foam, EPDM foam, etc. can be listed.

[0055] The non-porous portion 74 includes a core 76 and outer frame portions 78a, 78b, 78c. These support the porous portion 72 before and after foaming. The core 76 is maintained in a form enclosed in the porous portion 72. In addition to serving as a support, the core 76 can also contribute to improving the rigidity of the porous reinforcing member 70.

[0056] The outer frame portions 78a and 78b form the widthwise center and vertically lower edges of the porous reinforcing member 70. The outer frame portion 78c forms the upper edge of the porous reinforcing member 70. The porous reinforcing member 70 has no outer frame portion on the widthwise outer side.

[0057] The outer frame portions 78a, 78b, and 78c install and hold the porous portion 72 before foaming at a predetermined position. In addition, they also function as a wall portion that limits foaming, such as limiting the foaming shape. In addition, it can contribute to improving the rigidity of the porous reinforcing member 70. The outer frame portions 78a and 78b are provided to prevent the porous portion 72 from interfering with the rear window glass 40, etc. The outer frame portion 78c is provided to prevent the porous portion 72 from interfering with the assembly of other components. On the other hand, since there is no outer frame portion on the outside in the width direction of the porous reinforcing member 70, the foaming material 71 foams in a manner that bulges outward in the width direction until it reaches the joint with the inner plate 22 and the outer plate 24.

[0058] The material of the non-porous portion 74 is not particularly limited, and for example, metal, ceramic, plastic, etc. can be appropriately used. As the plastic, for example, epoxy resin or urethane resin can be used.

[0059] The shape of the porous reinforcing member 70 and the width across the upper edge 42 are not particularly limited and can be appropriately set according to the shapes of surrounding members, the rigidity of the porous reinforcing member 70 , or the required rigidity.

[0060] like Figure 3 As shown in FIG. 1 , the porous reinforcing member 70 is overlapped and arranged on a line connecting the inner bending point W1 of the corner 32a of the opening end edge 32 of the door panel 20 and the outer bending point W4 of the corner 27. More specifically, the portion of the porous reinforcing member 70 near the center in the width direction is arranged to exist on the above line. In addition, the porous reinforcing member 70 is arranged to cross the outer edge 62 of the hinge reinforcing member 60 on the outer side in the width direction.

[0061] like Figure 4 to Figure 5BAs shown, the porous reinforcing member 70 is arranged to fill the cross-sectional space outside the hinge support portion 56 in the width direction in the cross-sectional space S1 between the hinge reinforcing member 60 and the outer panel 24. In addition, the porous reinforcing member 70 is arranged to cross the upper edge 42 of the rear window glass 40 mounted on the upper surface of the outer panel 24 and overlap it continuously directly below.

[0062] In particular, if Figure 4 and Figure 5B As shown, the porous reinforcing member 70 fills the cross-sectional space directly below the upper edge 42 of the rear window glass 40 in the cross-sectional space S1 between the outer panel 24 and the hinge reinforcing member 60 without any gaps in the upper and lower parts. In addition, the porous reinforcing member 70 is joined to the surface 60a of the hinge reinforcing member 60 and the inner surface 24a of the outer panel 24. In addition, in this cross-sectional space, the cross section of the door panel 20 is composed of the inner panel 22, the hinge reinforcing member 60, the porous portion 72 of the porous reinforcing member 70, the non-porous portion 74, and the outer panel 24.

[0063] The porous reinforcing member 70 passes over the outer edge 62 of the hinge reinforcing member 60 and reaches the joint portion of the outer panel 24 and the inner panel 22. That is, the porous reinforcing member 70 reaches the cross-sectional space S2 near the joint of the outer peripheral edges of the inner panel 22 and the outer panel 24 and fills the cross-sectional space S2, and is also joined to their inner surfaces. In the cross-sectional space S2, the outer edge of the hinge reinforcing member 60 is passed. Therefore, in the cross-sectional space S2, the cross section of the door panel 20 is composed of the inner panel 22, the porous portion 72 of the porous reinforcing member 70, and the outer panel 24.

[0064] like Figure 6 As shown, such a porous reinforcing member 70 is integrated with the door panel 20 by in-situ foaming. That is, the porous reinforcing member 70 is installed on the hinge reinforcing member 60 overlapping with the inner panel 22 in a state before foaming, and is heated at least after the outer panel 24 is assembled. As a result, the foaming material 71 foams, and finally forms a porous portion 72, which fills the cross-sectional space S1 and the cross-sectional space S2 in a predetermined range along the upper edge 42 of the glass.

[0065] First, the porous reinforcing member 70 is assembled to the hinge reinforcing member 60 overlapping the inner panel 22 within a predetermined range of the upper edge 42 of the rear window glass 40 to be installed. Afterwards, after the outer panel 24 is installed, during or after the assembly of the back door 14, the portion where the door panel 20 or the porous reinforcing member 70 is arranged is heated, whereby the foaming material 71 foams.

[0066] By foaming, the porous portion 72 passes over the outer edge 62 of the hinge reinforcement member 60 from the outer side of the hinge support portion 56 of the upper end edge 42 of the rear window glass 40 to reach and fill the joint of the outer peripheral edges of the inner panel 22 and the outer panel 24, and is joined to their inner surfaces. In addition, by foaming, the porous portion 72 fills between the surface 60a of the hinge reinforcement member 60 and the inner surface 24a of the outer panel 24, and is joined to them.

[0067] Since the center, upper edge and lower end of the porous reinforcing member 70 are defined by the outer frame portions 78a, 78b and 78c, there is no interference with other components such as the rear window glass 40. At the same time, with the help of these outer frame portions 78, the porous portion 72 is reliably filled between the surface 60a of the hinge reinforcing member 60 and the inner surface 24a of the outer panel 24 and joined to them.

[0068] According to the above embodiment, the hinge reinforcement member 60 is provided at the corner 27 of the door panel 20, and the porous reinforcement member 70 is provided in a manner overlapping with the upper edge 42 of the rear window glass 40 on the outer side of the hinge support portion 56 of the cross-sectional space S1. Thus, the rigidity against bending deformation at the corner 27 of the door panel 20, especially at the outer side of the hinge support portion 56, can be imparted. In addition, the rigidity against bending deformation at the upper edge 42 of the rear window glass 40 can be imparted.

[0069] Thus, according to the above embodiment, a door panel structure can be simply provided, which can be installed even if the rear window glass 40 has a large area, a large mass, or a rear window glass 40 with a gentle inclination. In addition, by doing so, the cross-sectional area of ​​the closed cross-sectional space of the door panel can also be reduced.

[0070] Furthermore, since the porous reinforcing member 70 mainly includes the porous portion 72 and is made of a resin material, the door panel 20 can be reinforced without significantly increasing the weight of the vehicle.

[0071] In the above-mentioned embodiment, the porous reinforcing member 70 is provided with a special filling structure and a joining structure between the hinge reinforcing member 60, the outer panel 24, and the inner panel 22 in the cross-sectional space S1 and the cross-sectional space S2 of the door panel 20 at the rear side 14 of the vehicle. That is, the porous reinforcing member 70 is filled between the surface 60a of the hinge reinforcing member 60 and the inner surface 24a of the outer panel 24 in the vertical direction along the upper edge 42 of the glass on the outer side of the hinge support portion 56 of the cross-sectional space S1, and is joined to them. In addition, on the outer side in the width direction, it is filled between the inner surfaces of the joints of the outer peripheral edges of the inner panel 22 and the outer panel 24 across the hinge reinforcing member 60, and is joined to them. Therefore, at the corner 27, a firm integration of the door panel 20, the hinge reinforcing member 60, and the porous reinforcing member 70 can be achieved, and high rigidity can be reliably achieved in the portion requiring high rigidity.

[0072] In the above embodiment, the porous reinforcing member 70 before foaming is heated, so that the porous reinforcing member 70 is integrated with the cross-sectional space by foaming in situ. Therefore, a strong joint structure can be obtained simply and reliably.

[0073] In the above embodiment, in the cross-sectional space S1, the cross-sectional area is larger at the outer side in the width direction of the hinge support portion 56 than at the center. This can effectively improve the rigidity of the corner portion 27.

[0074] In the above embodiment, the porous reinforcing member 70 is equipped with a core 76 and outer frame parts 78a, 78b, 78c. Therefore, the porous reinforcing member 70 before foaming can be reliably arranged at a desired position, and the foaming can be restricted and the rigidity of the corner 27 can be reliably improved. At the same time, these core 76, outer frame parts 78a, 78b, 78c also contribute to the improvement of rigidity in some cases. In addition, the outer frame parts 78a, 78b, 78c can suppress the interference between the porous part 72 and other components.

[0075] In the above embodiment, the porous reinforcing member 70 is arranged so that the portion near the center in the width direction thereof exists on the line connecting the inner bending point W1 of the corner portion 32a of the opening end edge 32 of the door panel 20 and the outer bending point W4 of the corner portion 27. Therefore, the corner portion 32a of the opening end edge 32, where stress is easily concentrated, can be effectively reinforced.

[0076] In the above-mentioned embodiment, the inner edge 64 of the hinge reinforcement member 60 is spot welded at the inner bending point W1 of the corner 32a of the opening end edge 32 of each of the inner panel 22 and the outer panel 24 and at both sides thereof, at the point W2 of the upper edge 26 and the point W3 of the side edge 28b. Therefore, the corner 32a of the opening end edge 32, which is prone to stress concentration, can be effectively reinforced. The rigidity against torsional deformation at the corner 32a can be effectively improved. If the porous reinforcement member 70 is combined with the porous reinforcement member 70 being arranged on the line connecting the inner bending point W1 and the outer bending point W4 of the door panel 20, it is more effective in improving the rigidity against torsional deformation.

[0077] In the above embodiment, the cross-sectional area of ​​the closed cross-sectional space becomes the smallest at the upper side portion 26, forming the installation position of the high-mounted stop lamp 80. In the above embodiment, since the cross-sectional area of ​​the closed cross-sectional space becomes the smallest at the installation position for installing the high-mounted stop lamp 80, the corner portion 27 is reinforced and the rigidity is improved, so that the rear window glass 40 with a large mass can be installed.

[0078] According to the above embodiment, in addition to the vehicle equipped with the back door 14, the back door 14 installed at the rear of the vehicle body is also disclosed, and the back door 14 before the rear window glass 40 is installed is also disclosed. In addition, according to the above embodiment, a method for improving the rigidity of the back door and a method for manufacturing a back door with improved rigidity are also disclosed.

[0079] In addition, in the above embodiment, the side edge 28b of the door panel 20 is mainly described, but the porous reinforcement member 70 may be provided for each of the left and right hinge reinforcement members 60, or only for the side edge 28a, but it is not limited thereto. As long as at least one of them has such a reinforcement structure, it will be sufficient.

[0080] In the above embodiment, the inner panel 22, the hinge reinforcement member 60, the plate of the opening end edge 32 of the corner 27, the first reinforcement member and the outer panel are joined together at three locations at the opening corner 32a of the opening end edge 32 of the door panel 20, but it is not limited to this. It is sufficient to have any one location, for example, it is also possible to spot weld the three together only at the inner bending point W1. In addition, it is sufficient to spot weld the three components at any point, for example, it is also possible to spot weld two of them, for example, the inner panel 22 and the hinge reinforcement member 60, and the outer panel 24 and the hinge reinforcement member 60, at a point other than the one point.

[0081] In the above embodiment, a part of the porous reinforcing member 70 is arranged crosswise on the line connecting the inner bending point W1 and the outer bending point W4 of the corner portion 27, but the present invention is not limited to this. Even if there is no porous reinforcing member 70 on this line, the rigidity against bending deformation at the upper end edge 42 of the rear window glass 40 and the outer side of the hinge support portion 56 can be improved.

[0082] In the above embodiment, the porous reinforcing member 70 is continuously provided in the cross-sectional space S2 and the outer side of the hinge support portion 56 of the cross-sectional space S1, covering substantially the entire upper edge 42 of the rear window glass 40 and extending to the joint portion of the outer peripheral edge of the door panel 20, but the present invention is not limited thereto. It is sufficient to fill the closed cross-sectional space S3 at least in a portion of the upper edge 42. In addition, the closed cross-sectional space S3 may be filled in one or more portions along the upper edge 42. By doing so, in some cases, the rigidity against bending deformation or torsional deformation near the upper edge 42 or outside the hinge support portion 56 may also be improved.

[0083] In the above embodiment, the porous reinforcing member 70 is provided with the porous portion 72 and the non-porous core 76 in a manner overlapping with the glass upper edge 42 at a part of the cross-sectional space S1, but the present invention is not limited thereto. Even if the non-porous core 76 is not provided, the rigidity can be improved by the porous portion 72. In addition, the porous reinforcing member 70 is provided with the outer frame portions 78a, 78b, and 78c, but the present invention is not limited thereto. The outer frame portions 78a, 78b, and 78c can be appropriately set according to the necessity of limiting the foaming.

[0084] In the above embodiment, the porous reinforcing member 70 is arranged by foaming in situ, but the present invention is not limited to this. The porous reinforcing member 70 having appropriate rigidity may be arranged by using an adhesive or the like as needed.

[0085] The above describes in detail the specific examples of the technology disclosed in this specification, but these are only examples and do not limit the scope of the claims. The technology described in the claims includes implementation methods obtained by various deformations and changes of the specific examples illustrated above. The technical elements illustrated in this specification or the drawings play a technical role alone or in various combinations, and are not limited to the combinations recorded in the claims at the time of application. The technology illustrated in this specification or the drawings can achieve multiple purposes at the same time, and achieving one of the purposes itself has a technical effect.

Claims

1. A vehicle, characterized in that: include: Car body; as well as A back door, which is mounted at the rear of the vehicle body and is equipped with: rear window glass; A door panel, the door panel comprising: an inner panel, the inner panel being arranged on the inner side of the vehicle body; and an outer panel, the outer panel being arranged on the outer side of the vehicle body, the rear window glass being mounted on the outer panel, the inner panel and the outer panel being respectively provided with an upper edge, a side edge and a lower edge, defining an opening end edge for mounting the rear window glass; A hinge, the hinge being fixed to the upper edge of the inner panel and rotatably connecting the back door to the vehicle body; a first reinforcing member, which overlaps the vehicle body outer side of the inner panel, is fixed to the inner panel together with the hinge, and has a shape that extends from a hinge support portion that supports the hinge fixed to the inner panel, on the lower side in the vehicle body up-down direction, within a range overlapping with the upper edge of the glass that is the upper edge of the rear window glass, and on the outer side in the vehicle body width direction, within a range up to the side edge portion; as well as The second reinforcing member includes a porous portion and is arranged to fill a first space between the first reinforcing member and the outer panel at a location outside the hinge support portion in the vehicle body width direction and overlapping at least a portion of the upper edge of the glass.

2. The vehicle according to claim 1, characterized in that The second reinforcement member is arranged to intersect a line passing through an inner bending point and an outer bending point of a corner between the upper side portion and the side side portion of the door panel.

3. The vehicle according to claim 1, characterized in that The inner panel, the first reinforcement member, and the outer panel have at least one joining point at an inner corner edge including an inner bending point of a corner between the upper edge and the side edge of the door panel.

4. The vehicle according to claim 2, characterized in that The inner panel, the first reinforcement member, and the outer panel have at least one joining point at an inner corner edge including an inner bending point of a corner between the upper edge and the side edge of the door panel.

5. The vehicle according to any one of claims 1 to 4, characterized in that The second reinforcement member is further arranged to overlap with the upper edge of the glass and fill a second space between the inner panel and the outer panel near a joining portion of the inner panel and the outer panel on the outer sides in the vehicle body width direction.

6. The vehicle according to any one of claims 1 to 4, characterized in that The second reinforcement member is arranged to continuously overlap and fill the glass upper edge over a range from the vehicle body width direction outer side of the hinge support portion to a joining portion between the inner panel and the outer panel on the vehicle body width direction outer side.

7. The vehicle according to any one of claims 1 to 4, characterized in that The second reinforcement member is joined to a surface of the first reinforcement member on the vehicle body outer side and a surface of the outer panel on the vehicle body inner side.

8. The vehicle according to any one of claims 1 to 4, characterized in that The second reinforcement member is joined to an inner peripheral surface near a joining portion between the inner panel and the outer panel on the outer side in the vehicle body width direction.

9. The vehicle according to any one of claims 1 to 4, characterized in that The second reinforcing member overlaps with at least a portion of the upper edge of the glass and has a non-porous portion in addition to the porous portion.

10. The vehicle according to any one of claims 1 to 4, characterized in that The second reinforcement member is produced by foaming in situ and is integrated with the door panel.

11. The vehicle according to any one of claims 1 to 4, characterized in that The cross-sectional area of ​​the closed cross-sectional space of the upper side portions of the inner panel and the outer panel is minimized at a center portion in a vehicle body width direction.

12. A back door, mounted on the rear of a vehicle body, characterized in that: include: A door panel, the door panel comprising: an inner panel, the inner panel being arranged on the inner side of the vehicle body; and an outer panel, the outer panel being arranged on the outer side of the vehicle body, a rear window glass being mounted on the outer panel, the inner panel and the outer panel being respectively provided with an upper edge, a side edge and a lower edge, defining an opening end edge for mounting the rear window glass; A hinge, the hinge being fixed to the upper edge of the inner panel and rotatably connecting the back door to the vehicle body; a first reinforcing member, which overlaps the vehicle body outer side of the inner panel, is fixed to the inner panel together with the hinge, and has a shape that extends from a hinge support portion that supports the hinge fixed to the inner panel, on the lower side in the vehicle body up-down direction, within a range overlapping with the upper edge of the glass that is the upper edge of the rear window glass, and on the outer side in the vehicle body width direction, within a range up to the side edge portion; as well as The second reinforcing member includes a porous portion and is arranged to fill between the first reinforcing member and the outer panel at a location outside the hinge support portion in the vehicle body width direction and to overlap with at least a portion of the upper edge of the glass.

13. The back door of claim 12, wherein: The rear window glass is mounted on the opening end edge.

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