Back door and movable body

Abstract

To provide a back door and a movable body which have high rigidity.SOLUTION: A back door has an outer panel and an inner panel, wherein the inner panel has a pillar part, whose at least a part extends along an outer peripheral edge of the inner panel, the pillar part has a closed cross section part having a closed cross section perpendicular to the extension direction, and the inner panel is fixed to the outer panel by a fastening component in a part other than the closed cross section part.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a back door and a mobile body. [Background technology]

[0002] BACKGROUND ART Conventionally, there are known moving bodies such as automobiles that are equipped with back doors (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-1404 Summary of the Invention [Problem to be solved by the invention]

[0004] Recently, in order to reduce the weight of the vehicle body, a back door using resin components as components for the back door has become known, and such a back door is desired to have high rigidity.

[0005] An object of the present invention is to provide a highly rigid back door and a mobile body. [Means for solving the problem]

[0006] One aspect of the back door according to the present invention is A back door having an outer panel and an inner panel, The inner panel has a pillar portion at least a portion of which extends along the outer periphery of the inner panel, The pillar portion has a closed cross-sectional portion whose cross section perpendicular to the extending direction is a closed cross-sectional surface, The inner panel is fixed to the outer panel by fastening parts at a portion other than the closed cross-sectional portion.

[0007] One aspect of the mobile body according to the present invention includes the above-described back door. [Effects of the Invention]

[0008] According to the present invention, a highly rigid back door and a mobile body can be provided. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of a moving body according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a schematic diagram showing the appearance of the back door. [Figure 3] FIG. 3 is a schematic diagram showing the appearance of the inner panel. [Figure 4] FIG. 4 is a cross-sectional view taken along C1-C1 in FIG. [Figure 5] FIG. 5 is a cross-sectional view taken along the line C2-C2 of FIG. [Figure 6] FIG. 6 is a perspective view schematically showing a pillar portion in a region D1 of FIG. [Figure 7] FIG. 7 is a perspective view schematically showing a first modified example of the inner panel. [Figure 8A] FIG. 8A is a schematic view corresponding to the cross section taken along the line C3-C3 in FIG. [Figure 8B] FIG. 8B is a schematic diagram of the second modified example of the inner panel, corresponding to the cross section taken along line C3-C3 in FIG. [Figure 8C] FIG. 8C is a schematic diagram of the third modified example of the inner panel, corresponding to the cross section taken along line C3-C3 in FIG. [Figure 8D] FIG. 8D is a schematic diagram of the fourth modification of the inner panel, corresponding to the cross section taken along line C3-C3 in FIG. [Figure 8E] FIG. 8E is a schematic diagram of the fifth modified example of the inner panel, corresponding to the cross section taken along C1-C1 in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, a back door and a moving body according to the present invention will be described in detail with reference to the drawings. Note that the back door and the moving body described below are examples of the back door and the moving body according to the present invention, and the present invention is not limited to the embodiments described below.

[0011] [Embodiment] A back door 2 and a moving object 1 according to an embodiment of the present invention will be described with reference to FIGS.

[0012] FIG. 1 is a perspective view of a moving body 1 to which a back door 2 according to this embodiment is attached, as seen obliquely from the rear. An example of the moving body 1 is an automobile as shown in FIG. 1. However, the moving body 1 is not limited to an automobile, and may be various moving bodies (moving devices) having a back door. Specifically, the moving body 1 may be a ship, an aircraft, an air vehicle, a drone, a robot, etc. When the moving body 1 is an automobile, the moving body 1 may be a passenger car, a bus, etc.

[0013] 2 is a schematic diagram of the back door 2 according to this embodiment as seen from behind. In the following, when describing the structures of the moving body 1 and the back door 2, a Cartesian coordinate system (X, Y, Z) shown in each drawing will be used.

[0014] The X direction, Y direction, and Z direction refer to directions in a state in which the back door 2 is assembled to the moving body 1.

[0015] Specifically, the X direction coincides with the front-to-rear direction of the moving body 1. In this specification, the front-to-rear direction of the moving body 1 may be simply referred to as the front-to-rear direction. The positive side of the X direction coincides with the front side of the moving body 1. The negative side of the X direction coincides with the rear side of the moving body 1. Furthermore, the inward direction in the front-to-rear direction is the direction that approaches the center of the moving body 1 in the front-to-rear direction. The outward direction in the front-to-rear direction is the direction that moves away from the center of the moving body 1 in the front-to-rear direction.

[0016] The Y direction corresponds to the left-right direction of the moving object 1. The + side of the Y direction corresponds to the left side when looking at the moving object 1 from behind. The - side of the Y direction corresponds to the right side when looking at the moving object 1 from behind.

[0017] The Y direction is also the vehicle width direction of the moving body 1. The inward direction in the vehicle width direction is the direction approaching the center in the left-right direction of the moving body 1. The outward direction in the vehicle width direction is the direction away from the center in the left-right direction of the moving body 1.

[0018] The Z direction corresponds to the up-down direction of the moving body 1. The positive Z direction corresponds to the upper side of the moving body 1. The negative Z direction corresponds to the lower side of the moving body 1. In this specification, the upper side means the upper side in the vertical direction. Also, the lower side means the lower side in the vertical direction.

[0019] The back door 2 is a door provided at the rear of the mobile body 1. The back door 2 is attached to a vehicle body 10 (mobile body body) (see FIG. 1) of the mobile body 1 in a rotatable state. Specifically, the back door 2 rotates about a central axis O2 (see FIG. 1) that passes through the upper end of the back door 2 and is parallel to the left-right direction.

[0020] The rotation direction of the back door is not limited to the rotation direction of the back door 2 of this embodiment. For example, the back door may rotate about a central axis parallel to the up-down direction.

[0021] The back door 2 has a door body 3 and a window panel 8. In the following description, the back door 2 has the window panel 8, but the back door 2 does not necessarily have to have the window panel 8.

[0022] The door body 3 has a window opening 31 in which a window panel 8 is disposed. The door body 3 also has an inner panel 4 and an outer panel 6.

[0023] 3 is a schematic diagram showing the appearance of the inner panel 4. The inner panel 4 is provided on the inner side of the mobile body 1 relative to the outer panel 6, i.e., on the inner side in the fore-and-aft direction of the outer panel 6, when the back door 2 is assembled to the vehicle body 10 and is in a closed state that closes the opening of the vehicle body 10. Hereinafter, in the description of the back door 2, when the terms "inside" or "outside" are used without any particular specification, it means the inner side (inside the mobile body 1) or the outer side (outside the mobile body 1) in the fore-and-aft direction of the back door 2 when the back door 2 is assembled to the vehicle body 10 and is in a closed state that closes the opening of the vehicle body 10.

[0024] The inner panel 4 is a plate-like member made of a resin composition containing a fibrous reinforcing material, and overlaps with almost the entire surface of the outer panel 6 in the front-rear direction.

[0025] The resin composition constituting the inner panel 4 is not particularly limited, but may be, for example, a resin composition containing a thermoplastic resin. Examples of such thermoplastic resins include polyester resins such as polycarbonate, polyethylene terephthalate, polytrimethylene terephthalate, and polybutylene terephthalate; styrene-based resins such as polystyrene resin, high-impact polystyrene resin (HIPS), acrylonitrile-styrene copolymer (AS resin), acrylonitrile-butadiene-styrene copolymer (ABS resin), acrylonitrile-styrene-acrylic rubber copolymer (ASA resin), and acrylonitrile-ethylene propylene rubber-styrene copolymer (AES resin); polyolefin resins such as polyethylene and polypropylene; polyamide, polyimide, polyetherimide, polyurethane, polyphenylene ether, polyphenylene sulfide, polysulfone, and polymethacrylate. Among these, polyolefin-based resins are preferred because of their low specific gravity, which allows for reduction in the weight of the side door 2 and the mobile object 1, and their excellent processability. Polypropylene resin is more preferred. Furthermore, the fibrous reinforcing material contained in the resin composition constituting the inner panel 4 can be glass fiber, carbon fiber, metal fiber, natural fiber, ceramic fiber, synthetic fiber, etc., and for example, carbon fiber or glass fiber is preferred, and glass fiber is more preferred.

[0026] The content of fibrous reinforcing material contained in the resin composition constituting the inner panel 4 is, for example, 20% by mass or more and 45% by mass or less, preferably 25% by mass or more and 40% by mass or less, and more preferably 30% by mass or more and 40% by mass or less.

[0027] The rigidity of such an inner panel 4 is higher than the rigidity of the outer panel 6, which will be described later. Therefore, the rigidity of the back door 2 can be improved while reducing the weight of the back door 2.

[0028] The inner panel 4 has an inner-side opening 41 which, together with the outer-side opening 61 of the outer panel 6, constitutes the window opening 31. The inner-side opening 41 has a shape that follows the outer peripheral edge of the window panel 8 (see Figures 1 and 2). The inner-side opening 41 is formed by a through-hole that penetrates the inner-side opening 41 in the front-rear direction.

[0029] The inner panel 4 also has a pillar portion 5 and an inner-side fixing portion 7 .

[0030] The pillar portion 5 is provided in the inner panel 4 at a position (pillar region α with diagonal grid in FIG. 3) along the outer peripheral edge of the inner-side opening 41 (in other words, the window panel 8). In other words, the pillar portion 5 extends so as to follow the outer peripheral edge of the inner-side opening 41 (in other words, the window panel 8). From another perspective, it can also be said that at least a portion of the pillar portion 5 extends so as to follow the outer peripheral edge of the inner panel 4. Note that the specific shape of the pillar portion 5 is omitted in FIG. 3.

[0031] Such pillar portions 5 are portions for increasing the rigidity of the inner panel 4. In the case of this embodiment, the pillar portions 5 are provided at positions along the entire periphery of the inner-side opening 41 (in other words, the window panel 8).

[0032] However, the pillar portion 5 may be provided at a position along a part of the inner-side opening 41 (in other words, the window panel 8). Specifically, the pillar portion may be provided in an area α1 on the right side of the inner-side opening 41 (in other words, the window panel 8) and an area α2 on the left side of the inner-side opening 41 (in other words, the window panel 8) in the pillar area α indicated by the diagonal grid in Fig. 3 .

[0033] Region α1 is a region that extends in the vertical direction along the right peripheral edge of the inner-side opening 41 (in other words, the window panel 8). In other words, region α1 is a region that extends in the vertical direction along the right peripheral edge of the outer periphery of the inner panel 4. Region α2 is a region that extends in the vertical direction along the left peripheral edge of the inner-side opening 41 (in other words, the window panel 8). In other words, region α2 is a region that extends in the vertical direction along the left peripheral edge of the outer periphery of the inner panel 4.

[0034] In this case, the pillar portion does not need to be provided in the pillar region α marked with diagonal grid in Figure 3, in the region α3 above the inner opening 41 (in other words, the window panel 8) and in the region α4 below the inner opening 41 (in other words, the window panel 8).

[0035] The region α3 is a region extending in the left-right direction along the upper peripheral edge of the inner opening 41 (in other words, the window panel 8). The region α4 is a region extending in the left-right direction along the lower peripheral edge of the inner opening 41 (in other words, the window panel 8).

[0036] Returning to the description of the pillar portion 5, the pillar portion 5 is configured in the shape of a rectangular frame along the outer periphery of the inner-side opening 41 (in other words, the window panel 8). In other words, the pillar portion 5 is provided around the entire periphery of the pillar region α marked with diagonal grid in FIG. 3.

[0037] The specific configuration of the pillar portion 5 in this embodiment will be described below. Fig. 4 is a cross-sectional view taken along C1-C1 in Fig. 3. Specifically, Fig. 4 is a cross-sectional view of a portion of the pillar portion 5 corresponding to a closed cross-sectional portion 5b, which will be described later.

[0038] Moreover, Fig. 5 is a cross-sectional view taken along the line C2-C2 in Fig. 3. Specifically, Fig. 5 is a cross-sectional view of a portion of the pillar portion 5 that corresponds to an open cross-sectional portion 5a, which will be described later.

[0039] Fig. 6 is a perspective view schematically showing the pillar portion 5 in region D1 of Fig. 3. The outer panel 6 and the window panel 8 are omitted from Fig. 6. In Fig. 6, the window panel 8 is located on the negative side of the pillar portion 5 in the X direction and is arranged to extend on the positive side in the Y direction.

[0040] The pillar portion 5 is a protruding ridge that bulges forward (upward in Figures 4 and 5) from the inner surface of the inner panel 4. The pillar portion 5 has a first side plate portion 51, a second side plate portion 52, a first connecting plate portion 53, and a second connecting plate portion 54.

[0041] The first side plate portion 51 is a rectangular frame-like plate member that fits along the outer periphery of the inner opening 41 (in other words, the window panel 8). The first side plate portion 51 extends forward (upward in Figures 4 and 5) from the inner surface of the inner panel 4.

[0042] The second side plate portion 52 is a rectangular frame-like plate member that fits along the outer periphery of the inner opening 41 (in other words, the window panel 8). The second side plate portion 52 extends forward (upward in Figures 4 and 5) from the inner surface of the inner panel 4.

[0043] The second side plate 52 faces the first side plate 51 at a predetermined distance along the entire periphery of the pillar 5. The direction in which the first side plate 51 and the second side plate 52 face each other is referred to as the width direction of the pillar 5. A space 55 is provided between the second side plate 52 and the first side plate 51.

[0044] Specifically, in the case of the pillar portions 5 provided in the regions α1 and α2 in Fig. 3, the first side plate portion 51 and the second side plate portion 52 face each other in the left-right direction. In the case of the pillar portions 5 provided in the regions α1 and α2 in Fig. 3, the extending direction of the pillar portions 5 is the up-down direction.

[0045] 3, the first side plate portion 51 and the second side plate portion 52 face each other in the up-down direction. In the case of the pillar portions 5 provided in the regions α3 and α4 in FIG. 3, the extending direction of the pillar portions 5 is the left-right direction.

[0046] The pillar portions 5 shown in Figures 4 to 6 are pillar portions 5 provided in region α1 in Figure 3. For the configuration of the pillar portions 5 provided in regions α2 to α4 in Figure 3, the explanation regarding the pillar portions 5 provided in region α1 in Figure 3 may be used with appropriate modifications.

[0047] The first connecting plate portion 53 is a rectangular frame-like plate member that fits along the outer periphery of the inner opening 41 (in other words, the window panel 8). In the present embodiment, the first connecting plate portion 53 is parallel in the left-right and up-down directions.

[0048] The first connecting plate portion 53 connects the inner end portion (in other words, the front end portion) of the first side plate portion 51 and the inner end portion (in other words, the front end portion) of the second side plate portion 52 in the width direction of the pillar portion 5 around the entire circumference of the pillar portion 5.

[0049] The first connecting plate portion 53 and the first side plate portion 51 intersect at a predetermined angle (also referred to as a first angle). The first connecting plate portion 53 and the second side plate portion 52 intersect at a predetermined angle (also referred to as a second angle).

[0050] The first side plate portion 51, the second side plate portion 52, and the first connecting plate portion 53 form an open cross-sectional portion 5a (see FIG. 5 ) of the pillar portion 5. As shown in FIG. 5 , the cross-section of the open cross-sectional portion 5a is U-shaped, opening in the direction facing the outer panel 6 (outward). From another perspective, the cross-section of the open cross-sectional portion 5a of the inner panel 4 can also be said to have a hat-shaped cross-sectional shape formed by the first side plate portion 51, the second side plate portion 52, the first connecting plate portion 53, and inner-side fixing portions 7 (first inner-side fixing portions 71 and second inner-side fixing portions 72) described later, as shown in FIG. 5 . The open cross-sectional portion 5a of the pillar portion 5 is a portion of the pillar portion 5 other than the closed cross-sectional portion 5b described later. The cross-section of the open cross-sectional portion 5a is not limited to a U-shape and may be V-shaped.

[0051] It should be noted that the cross section of the pillar portion 5 refers to a cross section obtained by cutting the pillar portion 5 along a plane perpendicular to the direction in which the pillar portion 5 extends.

[0052] The cross section of the portion of the pillar portion 5 provided in region α1 (see Figure 3) and region α2 (see Figure 3) refers to a cross section when the pillar portion 5 is cut in a plane (i.e., XY plane) parallel to the front-to-back direction (i.e., X direction) and the left-to-right direction (i.e., Y direction).

[0053] The cross section of the portion of the pillar portion 5 provided in region α3 (see Figure 3) and region α4 (see Figure 3) refers to a cross section when the pillar portion 5 is cut in a plane (i.e., XZ plane) parallel to the front-to-back direction (i.e., X direction) and the up-to-down direction (i.e., Z direction).

[0054] Although not shown, ribs may be provided on the inner surfaces of the first side plate portion 51, the second side plate portion 52, and the first connecting plate portion 53 that constitute the open cross-section portion 5a of the pillar portion 5. The shape of the ribs may be determined appropriately in consideration of the rigidity of the open cross-section portion 5a.

[0055] 4 and 6, the second connecting plate 54 is a plate-like member extending in the width direction of the pillar 5. The second connecting plate 54 faces the first connecting plate 53. The direction in which the second connecting plate 54 and the first connecting plate 53 face each other is the front-rear direction. The direction in which the second connecting plate 54 and the first connecting plate 53 face each other is also referred to as the height direction of the pillar 5.

[0056] In the present embodiment, the second connecting plate portions 54 are provided at the four corners of the pillar portion 5. In other words, they are provided near the four corners of the substantially rectangular inner-side opening 41. Specifically, the second connecting plate portions 54 are provided in the portions of the pillar portion 5 indicated by regions D1 to D4 in FIG.

[0057] Region D1 is the upper end of region α1 in pillar region α. ​​Region D2 is the lower end of region α1 in pillar region α. ​​Region D3 is the upper end of region α2 in pillar region α. ​​Region D4 is the lower end of region α2 in pillar region α.

[0058] The second connecting plate portion 54 provided in region D1 will be described below. The configuration of the second connecting plate portion 54 provided in regions D2 to D4 may be based on the description of the second connecting plate portion 54 provided in region D1, with appropriate modifications.

[0059] The second connecting plate portion 54 connects the outer end portion (in other words, the rear end portion) of the first side plate portion 51 and the outer end portion (in other words, the rear end portion) of the second side plate portion 52 in the width direction.

[0060] The second connecting plate 54 and the first side plate 51 intersect at a predetermined angle (also referred to as a third angle). The second connecting plate 54 and the second side plate 52 intersect at a predetermined angle (also referred to as a fourth angle).

[0061] The first side plate portion 51, the second side plate portion 52, the first connecting plate portion 53, and the second connecting plate portion 54 form a closed cross-sectional portion 5b (see FIG. 4) of the pillar portion 5. As shown in FIG. 4, the cross section of the closed cross-sectional portion 5b is substantially rectangular.

[0062] The closed cross-sectional portion 5b of the pillar portion 5 is a portion other than the open cross-sectional portion 5a in the pillar portion 5. Such a closed cross-sectional portion 5b contributes to improving the rigidity of the pillar portion 5.

[0063] In particular, a relatively large stress acts on the portions of the pillar portion 5 provided in the regions D1 to D4, for example, when closing the back door 2. In the case of the present embodiment, the closed cross-sectional portions 5b of the pillar portion 5 are provided in the regions D1 to D4 of the pillar portion 5, and therefore the rigidity and durability of the pillar portion 5 against the above-mentioned stress can be improved.

[0064] The inner-side fixing portion 7 has a first inner-side fixing portion 71 and a second inner-side fixing portion 72. The first inner-side fixing portion 71 and the second inner-side fixing portion 72 are each a rectangular frame-shaped plate member that fits along the pillar portion 5. The first inner-side fixing portion 71 and the second inner-side fixing portion 72 are provided at positions that sandwich the pillar portion 5 in the width direction of the pillar portion 5.

[0065] In the present embodiment, the first inner fixing portion 71 and the second inner fixing portion 72 are each provided so as to extend along the entire circumference of the pillar portion 5. However, the first inner fixing portion and the second inner fixing portion may each be provided so as to extend along only a portion of the pillar portion 5.

[0066] In this case, the first inner-side fixing portion and the second inner-side fixing portion may each be provided so as to follow the open cross-sectional portion 5a of the pillar portion 5. In other words, the first inner-side fixing portion and the second inner-side fixing portion may each be provided so as to follow a portion of the pillar portion 5 that is shifted from the closed cross-sectional portion 5b.

[0067] The first inner-side fixing portion 71 and the second inner-side fixing portion 72 are each a portion that is fixed to the outer panel 6, which will be described later. However, the first inner-side fixing portion 71 and the second inner-side fixing portion 72 are each partially fixed to the outer panel 6 by fastening parts 91A, which will be described later.

[0068] The outer panel 6 (see FIG. 2) is provided on the outermost side of the door body 3. The outer panel 6 is a plate-shaped member made of a resin composition. The outer panel 6 may be made of multiple members. The resin composition making up the outer panel 6 is not particularly limited, but may be, for example, a resin composition containing a thermoplastic resin. The thermoplastic resin contained in the resin composition making up the outer panel 6 is the same as the thermoplastic resin contained in the resin composition making up the inner panel 4, and is preferably a polyolefin resin, more preferably a polypropylene resin.

[0069] The outer panel 6 is preferably made of a resin composition that is substantially free of fibrous reinforcing materials such as glass fibers, more preferably a thermoplastic resin composition that is substantially free of fibrous reinforcing materials. By making the outer panel 6 from a material that is substantially free of fibrous reinforcing materials, it is possible to improve the surface appearance. Note that the "resin composition that is substantially free of fibrous reinforcing materials" referred to here may also be a resin composition in which the content of fibrous reinforcing materials is 1% by mass or less when the entire resin composition is taken as 100% by mass.

[0070] The outer panel 6 has an outer opening 61 that constitutes the window opening 31. The outer opening 61 has a shape that follows the outer peripheral edge of the window panel 8. The outer opening 61 is formed by a through hole that penetrates the outer panel 6 in the front-to-rear direction.

[0071] Such an outer panel 6 is fixed to the inner panel 4. In the present embodiment, the outer panel 6 and the inner panel 4 are fixed by fastening parts 91A in a portion other than the closed cross-sectional portion 5b of the inner panel 4. The portion other than the closed cross-sectional portion 5b here refers to a portion of the plate-like portion constituting the inner panel 4 that, in a cross section perpendicular to the extension direction of the pillar portion 5, does not come into direct contact with the space completely surrounded by the closed cross-sectional portion 5b.

[0072] Specifically, as shown in Fig. 5, the outer panel 6 is fixed to the inner panel 4 by fastening parts 91A in a portion other than the closed cross-sectional portion 5b of the inner panel 4. The portion other than the closed cross-sectional portion 5b of the inner panel 4 is a portion other than the regions D1 to D4 in the pillar region α (see Fig. 3).

[0073] Hereinafter, the portion where the outer panel 6 is fixed to the inner panel 4 by the fastening parts 91A and 91B will be referred to as the panel fixing portion. The position of the panel fixing portion is not particularly limited as long as it is a portion other than the closed cross-sectional portion 5b of the inner panel 4. In addition, the number of panel fixing portions is also not particularly limited.

[0074] The positions and number of the panel fixing portions may be determined appropriately in consideration of the joining strength between the outer panel 6 and the inner panel 4 and / or the position of the closed cross-sectional portion 5b.

[0075] In this embodiment, the fastening parts 91A and 91B are composed of bolts 91a and 91c and nuts 91b and 91d. The bolts 91a and 91c are inserted through the outer fixing portion 62 of the outer panel 6 and the inner fixing portion 7 of the inner panel 4.

[0076] The outer fixing portion 62 faces the inner fixing portion 7 in the front-rear direction. The outer fixing portion 62 has a first outer fixing portion 62a and a second outer fixing portion 62b.

[0077] The first outer fixing portion 62a faces the first inner fixing portion 71 in the front-rear direction. The second outer fixing portion 62b faces the second inner fixing portion 72 in the front-rear direction.

[0078] In this embodiment, the first outer fixing portion 62a and the first inner fixing portion 71 are fixed together by a bolt 91a and a nut 91b of a fastening part 91A, and the second outer fixing portion 62b and the second inner fixing portion 72 are fixed together by a bolt 91c and a nut 91d of a fastening part 91B.

[0079] In this embodiment, no adhesive is used to fix the inner panel 4 and the outer panel 6 together.

[0080] The outer panel 6 and the window panel 8 are fixed together with an adhesive 92a. Specifically, the outer surface (in other words, the rear surface) of the first outer fixing portion 62a of the outer panel 6 is fixed to the inner surface (in other words, the front surface) of the window panel 8 with the adhesive 92a via the adhesive fixing portion 93.

[0081] In addition, an interference prevention rubber 92b is arranged between the outer surface (in other words, the rear surface) of the second outer fixing portion 62b of the outer panel 6 and the inner surface (in other words, the front surface) of the window panel 8.

[0082] The position where the outer panel 6 and the window panel 8 are fixed with the adhesive 92a (hereinafter referred to as the window panel fixing position) is not particularly limited. The window panel fixing position may be, for example, around the open cross-section portion 5a of the pillar portion 5, as shown in Figure 5. In other words, the window panel fixing position may be a position shifted from the closed cross-section portion 5b of the pillar portion 5 (see Figure 4).

[0083] (Actions and Effects of This Embodiment) According to the tailgate 2 according to the present embodiment as described above, a tailgate 2 and a vehicle 1 having high rigidity can be realized. Specifically, in the present embodiment, the pillar portion 5 of the inner panel 4 has a closed cross-sectional portion 5b. Such a closed cross-sectional portion 5b contributes to improving the rigidity of the pillar portion 5. In the present embodiment, the pillar portion 5 of the inner panel 4 has a closed cross-sectional portion 5b, which makes it possible to sufficiently increase the rigidity of the inner panel 4 alone. Therefore, the rigidity of the tailgate 2 can be ensured without bonding the inner panel 4 and the outer panel 6 with an adhesive to form a closed cross-section between the pillar 5 of the inner panel 4 and the outer panel 6 to increase the rigidity.

[0084] In particular, in the present embodiment, the portion where the outer panel 6 is fixed to the inner panel 4 by the fastening parts 91A, 91B (i.e., the panel fixing portion) is provided in a portion other than the portion that passes through the closed cross-sectional portion 5b and is located on a plane perpendicular to the extending direction of the pillar portion 5 (in other words, the portion that passes through the open cross-sectional portion 5a and is located on a plane perpendicular to the extending direction of the pillar portion 5). As a result, an additional closed cross section is formed by the panel fixing portion provided in the portion that passes through the open cross-sectional portion 5a and is located on a plane perpendicular to the extending direction of the pillar portion 5, the inner panel 4 (open cross-sectional portion 5a), and the outer panel 6, thereby improving the rigidity of the door body 3. In other words, this configuration can further increase the rigidity of the door body 3 compared to a configuration in which the panel fixing portion is provided only in the portion that passes through the closed cross-sectional portion 5b and is located on a plane perpendicular to the extending direction of the pillar portion 5.

[0085] 5, the portion where the outer panel 6 is fixed to the inner panel 4 by the fastening parts 91A and 91B (i.e., the panel fixing portion) has a closed cross section formed by the inner panel 4, the outer panel 6, and the fastening parts 91A and 91B. This configuration can increase the rigidity of the panel fixing portion. As a result, the rigidity of the entire back door 2 can be improved.

[0086] Furthermore, according to the back door 2 of this embodiment, the rigidity of the inner panel 4 can be increased without providing additional parts such as reinforcing members, etc. Therefore, the manufacturing costs of the back door 2 and the moving body 1 can be reduced.

[0087] Furthermore, the second connecting plate 54 constituting the closed cross-sectional portion 5b connects the outer end (in other words, the rear end) of the first side plate 51 and the outer end (in other words, the rear end) of the second side plate 52 of the pillar 5 in the width direction. In other words, the second connecting plate 54 is disposed in the same plane as the portions of the inner panel 4 adjacent to the pillar 5 (the first inner-side fixing portion 71 and the second inner-side fixing portion 72). Therefore, deformation that brings the outer end (in other words, the rear end) of the first side plate 51 and the outer end (in other words, the rear end) of the second side plate 52 closer to each other (deformation that closes the opening of the pillar 5) can be suppressed more effectively than when the second connecting plate 54 is disposed further forward.

[0088] Recently, there has been a demand for recycling of mobile objects from the viewpoint of environmental protection and resource conservation. In order to recycle efficiently, it is necessary to separate the components of the mobile object by material. In the case of the back door 2 according to this embodiment, it is necessary to separate the inner panel 4 and the outer panel 6.

[0089] However, when the inner panel and the outer panel are fixed with an adhesive, it is difficult to efficiently separate the inner panel and the outer panel. On the other hand, in the present embodiment, the rigidity of the inner panel 4 alone can be sufficiently increased, so that no adhesive is used to fix the inner panel 4 and the outer panel 6. In other words, in the present embodiment, the inner panel 4 and the outer panel 6 are fixed only by mechanical fastening using the fastening parts 91A or by snap fitting, which does not use adhesive.

[0090] Therefore, the inner panel 4 and the outer panel 6 in this embodiment can be easily separated by releasing the mechanical fixation such as fastening by the fastening parts 91A, which results in efficient recycling of the back door 2.

[0091] Generally, when the inner panel 4 and the outer panel 6 are fixed together with an adhesive, the pillar 5 of the inner panel 4 and the outer panel 6 form a closed cross section, which increases the rigidity. Also, the fixed portion between the inner panel 4 and the outer panel 6 is continuous. Therefore, the outer panel 6 can easily function as a member that reinforces the rigidity of the inner panel 4.

[0092] On the other hand, in a configuration in which the inner panel 4 and the outer panel 6 are fixed with fastening parts 91A and 91B as in the present embodiment, the fixed portions between the inner panel 4 and the outer panel 6 are discrete. This makes it difficult for the outer panel 6 to function as a member that reinforces the rigidity of the inner panel 4. However, in the present embodiment, the rigidity of the inner panel 4 is increased by the above-mentioned configuration, so a decrease in the rigidity of the entire door body 3 can be suppressed.

[0093] (Addendum) Modified examples of the inner panel 4 will be described below with reference to FIGS. 7 to 8D.

[0094] (Variation 1) Fig. 7 is a perspective view schematically showing an inner panel 4A according to Modification 1. Fig. 7 is a view corresponding to Fig. 6. Fig. 8A is a schematic view corresponding to the cross section taken along C3-C3 in Fig. 7.

[0095] The pillar portion 5A of the inner panel 4A has a plate-shaped first reinforcing portion 56 extending from the second connecting plate portion 54 toward the first connecting plate portion 53.

[0096] The first reinforcing portion 56 is a plate-shaped member that is perpendicular to the first side plate portion 51, the second side plate portion 52, and the second connecting plate portion 54. An end portion of the first reinforcing portion 56 on the first side plate portion 51 side is connected to a side surface of the first side plate portion 51.

[0097] An end of the first reinforcing portion 56 on the second side plate portion 52 side is connected to a side surface of the second side plate portion 52. An end of the first reinforcing portion 56 on the second connecting plate portion 54 side is connected to the second connecting plate portion 54.

[0098] The end of the first reinforcing portion 56 on the first connecting plate portion 53 side is not connected to the first connecting plate portion 53. A space 56a is provided between the end of the first reinforcing portion 56 on the first connecting plate portion 53 side and the first connecting plate portion 53.

[0099] The space 56a is a space where cables such as harnesses for supplying electricity and signals to various electronic devices (for example, an electronic locking device, brake lamps, and tail lamps) provided in the back door 2, and shatterproof wires are arranged. These cables are arranged in a space 55 surrounded by the first side plate portion 51, the second side plate portion 52, and the first connecting plate portion 53, along the pillar portion 5A.

[0100] The inner panel 4A according to Modification 1 can further increase the rigidity of the inner panel 4A (particularly the closed cross-sectional portion 5b). The first reinforcing portion 56 is connected to the first side plate portion 51 and the second side plate portion 52 of the pillar portion 5A. This more effectively suppresses deformation that would cause the outer end portion (in other words, the rear end portion) of the first side plate portion 51 and the outer end portion (in other words, the rear end portion) of the second side plate portion 52 to approach each other.

[0101] The inner panel 4A according to the first modification may have a rib 58a, shown by a two-dot chain line in Fig. 8A, on a side surface of the first reinforcing portion 56. The rib 58a corresponds to an example of a third reinforcing portion. The side surface of the first reinforcing portion 56 on which the rib 58a is provided is a side surface (also referred to as a first side surface) on one side in the extension direction of the pillar portion 5B.

[0102] The rib 58a is connected to the first reinforcing portion 56 and the second connecting plate portion 54. With this configuration, the rigidity of the inner panel 4A (particularly, the closed cross-sectional portion 5b) can be further increased.

[0103] (Variation 2) Fig. 8B is a schematic diagram of an inner panel 4B according to Modification 2, corresponding to the cross section taken along line C3-C3 in Fig. 7. In the description of the inner panel 4B according to Modification 2, Fig. 7, which was used in the description of the inner panel 4 according to Modification 1, will be referred to as appropriate.

[0104] The pillar portion 5B of the inner panel 4A has a plate-shaped first reinforcing portion 56 extending from the second connecting plate portion 54 toward the first connecting plate portion 53. The configuration of the first reinforcing portion 56 is similar to the configuration of the first reinforcing portion 56 in the first modification example described above.

[0105] The end of the first reinforcing portion 56 that is connected to the second connecting plate portion 54 (in other words, the rear end) is referred to as the first end of the first reinforcing portion 56. The end of the first reinforcing portion 56 opposite to the first end (in other words, the front end) is referred to as the second end of the first reinforcing portion 56.

[0106] The pillar portion 5B has a second reinforcing portion 57 at a second end portion of the first reinforcing portion 56. The second reinforcing portion 57 protrudes from the second end portion of the first reinforcing portion 56 to one side in the extending direction of the pillar portion 5B.

[0107] The second reinforcing portion 57 faces the second connecting plate portion 54 in the height direction (in other words, the front-rear direction) of the pillar portion 5B. The second reinforcing portion 57 is perpendicular to the first side plate portion 51, the second side plate portion 52, and the first reinforcing portion 56.

[0108] The second reinforcing portion 57 is connected to the first side plate portion 51 (see FIG. 7), the second side plate portion 52 (see FIG. 7), and the first reinforcing portion 56.

[0109] The inner panel 4B according to Modification 2 can further increase the rigidity of the inner panel 4B (particularly the closed cross-sectional portion 5b). The second reinforcing portion 57 is connected to the first side plate portion 51 (see FIG. 7) and the second side plate portion 52 (see FIG. 7) of the pillar portion 5B. This more effectively suppresses deformation that would cause the first side plate portion 51 and the second side plate portion 52 to approach each other.

[0110] The inner panel 4B according to the second modification may have a rib 58b, shown by a two-dot chain line in Fig. 8B, on a side surface of the first reinforcing portion 56. The rib 58b corresponds to an example of a third reinforcing portion. The side surface of the first reinforcing portion 56 on which the rib 58b is provided is a side surface (also referred to as a first side surface) on one side in the extension direction of the pillar portion 5C.

[0111] The rib 58b is connected to the first reinforcing portion 56, the second reinforcing portion 57, and the second connecting plate portion 54. With this configuration, the rigidity of the inner panel 4B (particularly, the closed cross-sectional portion 5b) can be further increased.

[0112] (Variation 3) 8C is a schematic diagram of an inner panel 4C according to Modification 3, corresponding to the cross section taken along line C3-C3 in FIG. 7. In describing the inner panel 4C according to Modification 3, reference will be made as appropriate to FIG. 7, which was used in describing the inner panel 4 according to Modification 1.

[0113] The pillar portion 5C of the inner panel 4C has a plate-shaped first reinforcing portion 56C extending from the second connecting plate portion 54 toward the first connecting plate portion 53 (see FIG. 7). The end of the first reinforcing portion 56C connected to the second connecting plate portion 54 is the first end of the first reinforcing portion 56C.

[0114] A first end of the first reinforcing portion 56C is connected to the center of the pillar portion 5C in the extending direction at the second connecting plate portion 54. In this example, the extending direction of the pillar portion 5C is the vertical direction of the moving body 1 (see FIG. 1).

[0115] The first reinforcing portion 56C is a plate-shaped member that is perpendicular to the first side plate portion 51 (see FIG. 7), the second side plate portion 52 (see FIG. 7), and the second connecting plate portion 54. The first reinforcing portion 56C is connected to the first side plate portion 51, the second side plate portion 52, and the second connecting plate portion 54.

[0116] An end portion of the first reinforcing portion 56C on the first connecting plate portion 53 (see FIG. 7) side is not connected to the first connecting plate portion 53. A space 56a (see FIG. 7) is provided between the end portion of the first reinforcing portion 56C on the first connecting plate portion 53 side and the first connecting plate portion 53.

[0117] The functions and effects obtained from the inner panel 4C according to the fourth modification are substantially the same as those obtained from the inner panel 4A according to the first modification.

[0118] The inner panel 4C according to the third modification may have ribs 58c1 and 58c2, shown by two-dot chain lines in Fig. 8C, on the side surface of the first reinforcing portion 56C. The ribs 58c1 and 58c2 are an example of a third reinforcing portion. The side surface of the first reinforcing portion 56C on which the rib 58c1 is provided is one side surface (also referred to as the first side surface) in the extension direction of the pillar portion 5C.

[0119] The side surface of the first reinforcing portion 56C on which the rib 58c2 is provided is the other side surface (also referred to as the second side surface) in the extending direction of the pillar portion 5C.

[0120] The rib 58c1 is connected to the first reinforcing portion 56C and the second connecting plate portion 54. In addition, the rib 58c2 is connected to the first reinforcing portion 56C and the second connecting plate portion 54. With this configuration, the rigidity of the inner panel 4B (particularly, the closed cross-sectional portion 5b) can be further increased.

[0121] (Variation 4) Fig. 8D is a schematic diagram of an inner panel 4D according to Modification 4, corresponding to the cross section taken along line C3-C3 in Fig. 7. In the description of the inner panel 4C according to Modification 4, Fig. 7, which was used in the description of the inner panel 4 according to Modification 1, will be referred to as appropriate.

[0122] The pillar portion 5D of the inner panel 4D has a plate-shaped first reinforcing portion 56D extending from the second connecting plate portion 54 toward the first connecting plate portion 53 (see FIG. 7). The configuration of the first reinforcing portion 56D is similar to the configuration of the first reinforcing portion 56C in the above-described third modification.

[0123] The end of the first reinforcing portion 56D that is connected to the second connecting plate portion 54 (in other words, the rear end) is referred to as the first end of the first reinforcing portion 56D. The end of the first reinforcing portion 56D opposite to the first end (in other words, the front end) is referred to as the second end of the first reinforcing portion 56D.

[0124] The pillar portion 5D has a second reinforcing portion 57D at a second end portion of the first reinforcing portion 56D. The second reinforcing portion 57D protrudes from the second end portion of the first reinforcing portion 56D to one side and the other in the extending direction of the pillar portion 5D. In this example, the extending direction of the pillar portion 5D is the up-down direction of the moving body 1 (see FIG. 1).

[0125] The second reinforcing portion 57D faces the second connecting plate portion 54 in the height direction (in other words, the front-rear direction) of the pillar portion 5B. The second reinforcing portion 57D is perpendicular to the first side plate portion 51 (see FIG. 7), the second side plate portion 52 (see FIG. 7), and the first reinforcing portion 56D.

[0126] The second reinforcing portion 57D is connected to the first side plate portion 51 (see FIG. 7), the second reinforcing portion 57 (see FIG. 7), and the first reinforcing portion 56.

[0127] The functions and effects obtained from the inner panel 4D according to the fourth modification are substantially the same as those obtained from the inner panel 4B according to the second modification.

[0128] The inner panel 4D according to the fourth modification may have ribs 58d1 and 58d2 shown by two-dot chain lines in FIG. 58d2 on the side surfaces of the first reinforcing portion 56D. The ribs 58d1 and 58d2 are an example of a third reinforcing portion. The side surface of the first reinforcing portion 56D on which the rib 58d1 is provided is one side surface (also referred to as the first side surface) in the extension direction of the pillar portion 5D.

[0129] The side surface of the first reinforcing portion 56D on which the rib 58d2 is provided is the other side surface (also referred to as the second side surface) in the extending direction of the pillar portion 5D.

[0130] The rib 58d1 and the rib 58d2 are connected to the first reinforcing portion 56D, the second reinforcing portion 57D, and the second connecting plate portion 54. With this configuration, the rigidity of the inner panel 4B (particularly, the closed cross-sectional portion 5b) can be further increased.

[0131] (Variation 5) Fig. 8E is a cross-sectional view of an inner panel 4E according to Modification 5, taken along the line C1-C1 in Fig. 3. Note that the outer panel and the window panel are omitted from Fig. 8E.

[0132] In the case of the inner panel 4E of this example, the configuration of the second connecting plate portion 54E of the pillar portion 5E is different from the configuration of the second connecting plate portion 54 of the pillar portion 5 (see FIG. 4) in the above-described embodiment.

[0133] In this example, the second connecting plate 54E is a plate-like member that is convex in a direction (i.e., rearward) away from the first connecting plate 53. The second connecting plate 54E has a shape that fits along the pillar covering portion 94, which is disposed rearward of the second connecting plate 54E.

[0134] The second connecting plate portion 54E corresponds to an example of a portion that fits along the inner surface of the pillar covering portion in the closed cross section.

[0135] The pillar covering portion 94 is a member that constitutes the back door. The pillar covering portion 94 covers the pillar portion 5 from the outside. In this example, the pillar covering portion 94 has a shape that bulges outward in the front-rear direction.

[0136] The pillar covering portion 94 may be, for example, an outer panel (not shown), or may be a design part (for example, a rear wing) provided on the outside of the outer panel.

[0137] When the pillar covering portion 94 is a design component provided on the outside of the outer panel, the portion of the outer panel (not shown) that faces the pillar covering portion 94 may have a shape that follows the pillar covering portion 94.

[0138] In the case of the inner panel 4E according to the fifth modified example, the second connecting plate portion 54E is a plate-like member that is convex in the direction away from the first connecting plate portion 53 (i.e., rearward), which allows the area of ​​the closed cross-sectional portion 5c in the cross-sectional shape shown in FIG.

[0139] The second connecting plate portion 54E is connected to the center O of the closed cross-sectional portion 5c. 5c The inner panel 4E is disposed at a position relatively far from the closed cross-sectional portion 5c. This configuration contributes greatly to improving the rigidity of the closed cross-sectional portion 5c. As a result, the rigidity of the inner panel 4E (particularly the closed cross-sectional portion 5b) can be further increased. [Explanation of symbols]

[0140] 1. Mobile 10 Vehicle body 2. Backdoor 3 Door body 4, 4A, 4B, 4C, 4D, 4E inner panels 5, 5A, 5B, 5C, 5D, 5E Pillar part 5a Open section 6 Outer panel 8 window panels 91A, 91B Fasteners

Claims

1. A back door having an outer panel and an inner panel, the inner panel has a pillar portion at least a portion of which extends along an outer peripheral edge of the inner panel, the pillar portion has a closed cross-sectional portion whose cross section perpendicular to the extending direction is a closed cross-sectional surface, The inner panel is fixed to the outer panel by fastening parts at a portion other than the closed cross-sectional portion. back door.

2. The pillar portion has, in a portion other than the closed cross-sectional portion, an open cross-sectional portion whose cross section perpendicular to the extending direction is open in a direction facing the outer panel. The back door according to claim 1.

3. The open cross-sectional portion is located on a plane that passes through the fastening component and is perpendicular to the extension direction. The back door according to claim 2.

4. The closed cross-sectional portion is first side plate part, a second side plate portion facing the first side plate portion in the width direction of the pillar portion; a first connecting plate portion that connects a first end portion of the first side plate portion and a first end portion of the second side plate portion in the width direction; and a second connecting plate portion connecting the second end portion of the first side plate portion and the second end portion of the second side plate portion in the width direction, The back door according to claim 1.

5. The pillar portion has a plate-shaped first reinforcing portion extending from the second connecting plate portion toward the first connecting plate portion. The back door according to claim 4.

6. The pillar portion has a plate-shaped second reinforcing portion provided at an end portion of the first reinforcing portion on the first connecting plate portion side. The back door according to claim 5.

7. The pillar portion has a plate-shaped third reinforcing portion provided on a side surface of the first reinforcing portion. The back door according to claim 5.

8. Further provided is a pillar covering portion that covers the pillar portion from the outside, The closed cross-sectional portion has a portion that follows the inner surface of the pillar covering portion. The back door according to claim 1.

9. The pillar covering portion has an outwardly bulging shape. The back door according to claim 8.

10. A mobile body; The back door according to any one of claims 1 to 9, Mobile object.

Images