JP7320911B2 - back door structure - Google Patents

Description

The present invention relates to a vehicle back door structure.

The vehicle backdoor structure of Patent Document 1 has a backdoor and a rear spoiler. The back door is constructed by combining an inner panel and an outer panel so as to form a closed space therebetween. The rear spoiler is attached to the vehicle outer side surface of the outer panel that forms the closed space.

JP 2019-26035 A

Since the rear spoiler is attached to the outer panel that forms a closed space, it is easy to secure the rigidity of the rear spoiler attachment location. However, since the mounting location of the rear spoiler forms a closed space, it tends to be large and the weight of the back door increases.

SUMMARY OF THE INVENTION One of the objects of the present invention is to provide a back door structure that has a simple structure and can increase the rigidity of a rear spoiler attachment portion of the back door.

A back door structure according to an aspect of the present invention includes:
A vehicle back door having a resin outer panel and a resin inner panel;
a rear spoiler attached to at least one of the left and right side edges and the upper edge of the back door so as to form a predetermined space between the exterior surface and the exterior surface of the vehicle;
The inner panel is
an exposed portion having the vehicle exterior surface exposed from the outer panel and covered with the rear spoiler;
and a reinforcing rib that is provided inside the space and protrudes toward the inside of the rear spoiler from the vehicle-exterior surface of the exposed portion.

In the above-described back door structure, reinforcing ribs having a sufficient height are provided for the exposed portion of the inner panel exposed from the outer panel to which the rear spoiler is attached. This is because it is easy to increase the size of the space between the exposed portion and the rear spoiler. The back door structure described above can increase the rigidity of the rear spoiler mounting portion of the back door with a simple configuration in which a reinforcing rib having a sufficient height is provided. Therefore, the rear spoiler does not have to be attached to a closed space formed by an inner panel and an outer panel as in the conventional art. Therefore, the size and weight of the back door can be reduced, the cost can be reduced, and the productivity can be improved.

Also, the above backdoor structure looks nice. This is because the reinforcing ribs are generally covered by the rear spoiler, which is opaque, from the outside of the vehicle, making it difficult to be seen from the outside of the vehicle.

1 is a schematic perspective view of a back door structure according to Embodiment 1. FIG. FIG. 2 is a cross-sectional view schematically showing the back door structure cut along the (II)-(II) cutting line in FIG. 1; FIG. 2 is a cross-sectional view schematically showing the back door structure cut along the (III)-(III) cutting line in FIG. 1; FIG. 5 is a cross-sectional view showing an outline of a back door structure according to Embodiment 2;

An embodiment of the back door structure of the present invention will be described below with reference to the drawings. The same reference numerals in the drawings indicate the same names. In the drawing, "FR" indicates the front of the vehicle, "RR" the rear, "LH" the left, "RH" the right, "UP" the top, and "LWR" the bottom.

<<Embodiment 1>>
[Backdoor structure]
A back door structure 1 according to Embodiment 1 will be described with reference to FIGS. 1 to 3. FIG. A backdoor structure 1 of this embodiment includes a backdoor 2 and a rear spoiler 6 of a vehicle 100 . The back door 2 has an outer panel 31 and an inner panel 32 (Fig. 2). The rear spoiler 6 is attached to at least one of the left and right sides and the upper side of the back door 2 on the outside of the vehicle. One of the features of the back door structure 1 is that the rear spoiler 6 forms a predetermined space between the rear spoiler 6 and the vehicle exterior side of the back door 2, and the inner panel 32 exposed from the outer panel 31 and covered with the rear spoiler 6. and a reinforcing rib 323 is provided in the exposed portion 322 . Each configuration will be described in detail below. In the following description, the surface on the outside of the vehicle may be called the outer surface, and the surface on the inside of the vehicle may be called the inside surface.

[back door]
The back door 2 opens and closes an opening (not shown) at the rear of the vehicle 100 (FIG. 1). The opening and closing method of the back door 2 is a flip-up method in this embodiment. The opening and closing method of the back door 2 may be a horizontal opening type or a double opening type. The back door 2 is rotatably supported at the rear end portion of the roof 110 of the vehicle 100 . The back door 2 has a door panel 3 and a rear glass 4.

The door panel 3 has an outer panel 31 arranged outside the vehicle and an inner panel 32 arranged inside the vehicle (Figs. 2 and 3). A material for the outer panel 31 and the inner panel 32 is resin. Openings covered with the rear glass 4 are formed in the upper portions of the outer panel 31 and the inner panel 32 . Upper portions of the outer panel 31 and the inner panel 32 have peripheral edge portions to which the outer peripheral edge of the rear glass 4 is fixed. In this embodiment, the outer peripheral edge of the rear glass 4 is fixed to the outer surface of the outer panel 31 at the peripheral edge of the opening. An adhesive 5, for example, can be used to fix the outer panel 31 and the rear glass 4 together. The outer surface of the rear glass 4 is curved from the center toward the left and right side edges so that the center in the left-right direction projects toward the rear side of the vehicle 100 when viewed from above. That is, the left and right side edges of the outer peripheral edge of the rear glass 4 are located on the front side of the vehicle 100 with respect to the center. Therefore, the water droplets 200 adhering to the rear window 4 tend to flow toward both the left and right sides of the rear window 4 (back door 2) when the back door 2 is opened or closed, for example.

Left and right sides of the inner panel 32 at the periphery of the opening have overlapping portions 321 and exposed portions 322 (FIGS. 2 and 3). The overlapping portion 321 overlaps the left and right side edges of the opening of the outer panel 31 and the outer peripheral edge of the rear glass 4 . The overlapping portion 321 has a hat-shaped cross section. The overlapping portion 321 and the outer panel 31 are fixed together to form a hollow closed cross section. The exposed portion 322 protrudes outward in the left-right direction from the left and right sides of the outer panel 31 (the outer peripheral edge of the rear glass 4). The outer surface of the exposed portion 322 is exposed from the outer panel 31 and the rear glass 4 . The outer surface of this exposed portion 322 is covered with the rear spoiler 6 . The exposed portion 322 has reinforcing ribs 323 and through holes 324 .

<Reinforcement rib>
The reinforcing rib 323 reinforces the exposed portion 322 of the inner panel 32 (FIGS. 2 and 3). Reinforcement rib 323 protrudes from the outer surface of exposed portion 322 toward rear spoiler 6 (rear side of vehicle 100). This reinforcing rib 323 extends into the interior space of the rear spoiler 6 .

In this embodiment, the reinforcing rib 323 is composed of a single ridge continuously extending in the vertical direction of the vehicle 100 (perpendicular to the paper surfaces of FIGS. 2 and 3). The length along the vertical direction of the reinforcing rib 323 is preferably as long as possible. The longer the length of the reinforcing rib 323, the easier it is to reinforce the exposed portion 322 over a wide range in the vertical direction. Depending on the shape of the exposed portion 322 of the inner panel 32 and the side spoiler 60, the reinforcing rib 323 may be curved in its longitudinal direction, and the height (protruding height) of the reinforcing rib 323, which will be described later, may vary in its longitudinal direction. can be different.

Reinforcement rib 323 may be configured by a plurality of projecting pieces intermittently provided in the vertical direction of vehicle 100 . When the reinforcing rib 323 is composed of a plurality of projecting pieces, each projecting piece may be linear or curved in the vertical direction. The length along the vertical direction of each projecting piece and the height of each projecting piece may be the same or different from each other. The height of one projecting piece may be uniform or partially different.

The height of reinforcing rib 323 may be such that at least the tip of reinforcing rib 323 is positioned rearward of vehicle 100 relative to the outer surface of outer panel 31 . Then, the reinforcing ribs 323 have a sufficient height. Therefore, the reinforcing ribs 323 can easily reinforce the exposed portion 322 . The height of the reinforcing rib 323 is preferably such that the tip of the reinforcing rib 323 is located behind the outer surface of the rear glass 4 with respect to the vehicle 100 .

Moreover, the height of the reinforcing rib 323 is preferably set to a length that reduces the distance between the reinforcing rib 323 and a stopper portion 623 (described later) of the rear spoiler 6 . It is preferable that the distance between the reinforcing rib 323 and the stopper portion 623 is as small as possible. In particular, the gap between the reinforcing rib 323 and the stopper portion 623 should be smaller than the gap between the outer surface of the rear glass 4 and one (inside in the left-right direction) end surface of the body portion 61 of the side spoiler 60 (described later). is preferred. When the back door 2 is closed, even if the side spoiler 60 is manually pushed from the outside, it is easy to prevent the side spoiler 60 from falling inward in the left-right direction. If the gap between the reinforcing rib 323 and the stopper portion 623 is small, the displacement amount of the side spoiler 60 until the stopper portion 623 abuts and stops against the reinforcing rib 323 can be reduced when the side spoiler 60 is manually pushed. is. Moreover, collision of the side spoiler 60 with the rear glass 4 can be easily suppressed. This is because the stopper portion 623 can be brought into contact with the reinforcing rib 323 before the side spoiler 60 collides with the rear glass 4 .

The height of the reinforcing rib 323 of this embodiment is such that the tip thereof is located behind the vehicle 100 relative to the outer surface of the rear glass 4 . The reinforcement rib 323 forms a predetermined gap with the stopper portion 623 of the rear spoiler 6 . The size of the gap between the reinforcing rib 323 and the stopper portion 623 is smaller than the gap between one end surface (inside in the left-right direction) of the main body portion 61 and the outer surface of the rear glass 4 .

The reinforcing rib 323 of this embodiment also functions as a rain gutter for discharging the water droplets 200 adhering to the back door 2 in a predetermined direction. As described above, the water droplets 200 tend to flow toward the left and right sides of the back door 2 when the back door 2 is opened and closed, for example. Therefore, the water droplet 200 flows toward the reinforcing rib 323 side. The water droplets 200 that have flowed toward the reinforcing rib 323 collide with the reinforcing rib 323 and flow along the longitudinal direction of the reinforcing rib 323 .

In this embodiment, the reinforcing rib 323 is formed continuously with the exposed portion 322 by resin molding the inner panel 32 . The reinforcing ribs 323 may be formed by bending (press molding) the exposed portions 322 .

<Through hole>
A fixing member 7 (described later) is inserted through the through hole 324 . The through hole 324 is formed outside the reinforcing rib 323 in the exposed portion 322 in the left-right direction. Therefore, it is possible to prevent water droplets 200 adhering to the rear glass 4 from entering the interior of the door panel 3 through the through holes 324 when the back door 2 is opened or closed. This is because the height of the reinforcing ribs 323 can prevent the water droplets 200 from climbing over the reinforcing ribs 323 . Therefore, the water droplets 200 do not flow into the through holes 324 provided outside the reinforcing ribs 323 in the left-right direction. The number of through-holes 324 is plural in this embodiment. The plurality of through holes 324 are provided at predetermined intervals along the vertical direction of the exposed portion 322 .

[Rear spoiler]
The rear spoiler 6 has a side spoiler 60 attached to the outer surface of the exposed portion 322 of the inner panel 32 in this embodiment. The rear spoiler 6 may have an upper spoiler (roof spoiler) attached to the upper side of the back door 2 . The side spoiler 60 (rear spoiler 6) is opaque. The side spoiler 60 has a body portion 61 and a base portion 62 .

(main body)
The body portion 61 is a portion exposed to the outside of the vehicle. The cross-sectional shape of the main body portion 61 is U-shaped in this embodiment. One (inside in the left-right direction) end surface of the body portion 61 faces the outer surface of the rear glass 4 . A predetermined gap is formed between one end surface of the body portion 61 and the rear glass 4 . Water droplets 200 adhering to the rear glass 4 flow to the reinforcing ribs 323 through the gaps. The other (left-right direction outer) end face of body portion 61 faces rear pillar 120 (rear end of the body) of vehicle 100 .

(base)
The base portion 62 is provided inside the main body portion 61 and bridges the inner peripheral surface on one end side (inside in the left-right direction) of the main body portion 61 and the inner peripheral surface on the other end side (outside in the left-right direction). (Fig. 2). Due to the bridging by the base portion 62, the body portion 61 and the base portion 62 form a hollow closed cross section. Therefore, it is easy to suppress deformation of the main body portion 61 . The base portion 62 is provided at a portion of the side spoiler 60 (rear spoiler 6) where the side spoiler 60 is attached to the exposed portion 322 by the fixing member 7 (FIGS. 2 and 3). That is, the base portion 62 is not provided at a location where it cannot be attached to the exposed portion 322 (FIG. 3). A plurality of base portions 62 are provided at predetermined intervals along the length of the side spoiler 60 . The cross-sectional shape of the base 62 is Z-shaped in this embodiment. The base portion 62 has one end portion fixed to the inner peripheral surface on the one end side of the main body portion 61, the other end portion fixed to the inner peripheral surface on the other end side of the main body portion 61, and the one end portion and the other end portion. and a fixed portion provided therebetween and fixed to the exposed portion 322 . One end of the base portion 62 forms a predetermined space with the outer surface of the exposed portion 322 . The predetermined space is, for example, a space larger than the gap between the rear glass 4 and the door panel 3 (outer panel 31). Since the predetermined space is larger than the gap between the rear glass 4 and the door panel 3, the height of the reinforcing rib 323 can be increased. One end of the base portion 62 has a stopper portion 623 , and the fixing portion of the base portion 62 has a through hole 624 .

<Stopper>
The stopper portion 623 is stopped by the reinforcing rib 323 when the side spoiler 60 is manually pushed when the back door 2 is closed. The stopper portion 623 and the reinforcing rib 323 can prevent the side spoiler 60 from falling inward in the left-right direction. The position where the stopper portion 623 is formed is the position facing the reinforcing rib 323 on the inner surface of one end of the base portion 62 . A small gap is formed between the stopper portion 623 and the reinforcing rib 323 . The height of stopper portion 623 (the length in the front-rear direction of vehicle 100) is determined according to the height of reinforcing rib 323 so that the gap between stopper portion 623 and reinforcing rib 323 is equal to that of one end surface of main body portion 61 and the rear glass. 4 may be set to a length that is smaller than the gap between them. The number of stopper portions 623 is plural in this embodiment. A plurality of stopper portions 623 are provided at predetermined intervals along the vertical direction of the base portion 62 . Each stopper portion 623 is composed of a projecting piece projecting from the inner surface of the base portion 62 toward the reinforcing rib 323 side. Note that the number of stopper portions 623 may be singular. In that case, the stopper portion 623 may be configured by a ridge extending in the vertical direction of the base portion 62 .

<Through hole>
A fixing member 7 (described later) is inserted through the through hole 624 . The formation location of the through hole 624 is a position facing the through hole 324 of the exposed portion 322 in the fixed portion.

[Fixing member]
The fixing member 7 fixes the exposed portion 322 of the inner panel 32 and the side spoiler 60 . The fixing member 7 is inserted into the through hole 324 of the exposed portion 322 and the through hole 624 of the base portion 62 from the inner side of the inner panel 32 . A clip (lining clip, two-piece clip), a bolt, or the like can be used as the fixing member 7, for example.

[others]
The back door structure 1 further fills the gap between the back door 2 and the rear pillar 120 in a state where the back door 2 closes the rear opening of the vehicle 100, thereby preventing rain and wind from entering the vehicle from outside. It may be provided with a weatherstrip 8 that By filling the gap between the back door 2 and the rear pillar 120 with the weather strip 8, the appearance from the outside of the vehicle can be improved. In this embodiment, the weather strip 8 is interposed between a portion of the exposed portion 322 of the inner panel 32 outside the through hole 324 in the left-right direction and a portion of the body portion 61 of the side spoiler 60 outside in the left-right direction. .

[Effect]
The back door structure 1 according to Embodiment 1 can have the following effects.

(1) A reinforcing rib 323 having a sufficient height is provided for the exposed portion 322 of the inner panel 32 exposed from the outer panel 31 and to which the rear spoiler 6 is attached. This is because it is easy to increase the size of the space between the exposed portion 322 and the rear spoiler 6 . Thus, the rigidity of the mounting location of the rear spoiler 6 in the back door 2 can be increased by a simple structure such as providing the reinforcing rib 323 with a sufficient height. Therefore, the mounting location of the rear spoiler 6 does not have to be a closed space formed by the outer panel 31 and the inner panel 32 . Therefore, it is easy to reduce the size and weight of the back door 2, reduce the cost, and improve the productivity.

(2) It looks good. This is because the reinforcement rib 323 is covered from the outside of the vehicle by the opaque side spoiler 60, and is therefore difficult to be seen from the outside of the vehicle.

(3) It is possible to prevent the side spoiler 60 from falling inward in the left-right direction. The height of the reinforcing rib 323 is high, and the distance between the reinforcing rib 323 and the stopper portion 623 of the side spoiler 60 is small. Therefore, when the back door 2 is closed, the amount of displacement of the side spoiler 60 until the stopper portion 623 abuts and stops against the reinforcing rib 323 when the side spoiler 60 is manually pushed can be reduced. Moreover, the collision of the side spoiler 60 with the rear glass 4 can be suppressed. This is because, when the side spoiler 60 is pushed by hand, the stopper portion 623 can be stopped against the reinforcing rib 323 before the side spoiler 60 collides with the rear glass 4 .

(4) Even if a large amount of water droplets 200 adhere to the back door 2 and flow toward the reinforcing ribs 323 when the back door 2 is opened and closed, the water droplets 200 are easily guided in the longitudinal direction of the reinforcing ribs 323. . This is because the height of the reinforcing rib 323 can be made sufficiently high as described above. Therefore, it is easy to flow the water droplets 200 in a predetermined direction.

<<Embodiment 2>>
[Back door structure]
A back door structure 1 according to Embodiment 2 will be described with reference to FIG. FIG. 4 is a cross-sectional view showing a state in which the back door structure 1 according to Embodiment 2 is cut at the same position as the cross-sectional view shown in FIG. The back door structure 1 of this embodiment is mainly characterized in that the reinforcing ribs 323 do not function as rain gutters, and that the rain gutter section 311 is provided separately from the reinforcing ribs 323 and has a function as a rain gutter. is different from the back door structure 1 of the first embodiment. The following description will focus on the differences from the first embodiment. A description of the configuration similar to that of the first embodiment is omitted.

[back door]
(rain gutters)
The rain gutter 311 discharges the water droplets 200 adhering to the back door 2 in a predetermined direction. The rain gutter 311 of this embodiment is provided in the exposed area of the outer panel 31 . The exposed area of the outer panel 31 protrudes laterally outward from the left and right edges of the rear glass 4 . The outer surface of the exposed area of the outer panel 31 is exposed from the rear glass 4 . The gutter portion 311 protrudes from the outer surface of the exposed area of the outer panel 31 toward the rear side of the vehicle 100 . The gutter portion 311 is composed of a single ridge continuously extending in the vertical direction (perpendicular to the paper surface of FIG. 4) of the exposed area of the outer panel 31 .

The height (projection length) of the rain gutter 311 is preferably as high as possible. The higher the height of the rain gutter 311, the more water droplets 200 adhere to the back door 2, and even if a large amount of water droplets 200 flow toward the rain gutter when the back door 2 is opened and closed, the water droplets 200 will not rain. It is difficult to get over gutter 311 . Therefore, it is easy to guide the water droplets 200 in the longitudinal direction of the gutter portion 311 . Therefore, the rain gutter 311 can easily flow the water droplets 200 in a predetermined direction. It is preferable that the height of the gutter portion 311 is greater than the gap between the outer panel 31 and the rear glass 4 . Furthermore, the height of the rain gutter 311 is preferably such that the tip of the rain gutter 311 is located outside the outer surface of the rear glass 4 . The height of the gutter part 311 of this embodiment is such that the tip thereof is positioned behind the vehicle 100 relative to the outer surface of the rear glass 4 . The gutter portion 311 forms a predetermined gap between the end surface of the tip thereof and the base portion 62 of the rear spoiler 6 . The size of the gap between the gutter part 311 and the base part 62 is larger than the gap between the tip of the reinforcing rib 323 and the stopper part 623 .

It is preferable that the length along the vertical direction of the rain gutter 311 is as long as possible. The longer the length of the gutter 311, the easier it is for the water droplets 200 attached to the rear glass 4 to flow over a wide range in the vertical direction of the rear glass 4 in a predetermined direction. Depending on the shape of the exposed portion 322 of the inner panel 32 and the side spoiler 60, the gutter portion 311 may be curved in its longitudinal direction, or the height of the gutter portion 311 may be different in its longitudinal direction. .

In this embodiment, the rain gutter 311 is formed continuously with the outer panel 31 by molding the outer panel 31 with resin. The rain gutter portion 311 may be formed by bending (press molding) a portion of the outer panel 31 .

[Rear spoiler]
One end (inside in the left-right direction) of the body portion 61 of the side spoiler 60 (rear spoiler 6 ) is positioned inside the gutter portion 311 in the left-right direction. The body portion 61 covers the gutter portion 311 from the rear side of the vehicle 100 .

[Effect]
The back door structure 1 according to the second embodiment can increase the rigidity of the exposed portion 322 by the reinforcing ribs 323 . In addition, in the back door structure 1 of this embodiment, although the reinforcing ribs 323 do not have the function of a rain gutter, the rain gutter portion 311 is provided separately from the reinforcing ribs 323, so that the back door 2 can be opened and closed when the back door 2 is opened and closed. It is easy to guide a large amount of adhering water droplets 200 in the longitudinal direction of the gutter portion 311 . Furthermore, the back door structure 1 of this embodiment looks good even if it has the rain gutter 311 in addition to the reinforcing ribs 323 . This is because the rain gutter 311 is covered from the rear side of the vehicle 100 by the main body 61 of the opaque side spoiler 60, so that it is difficult to see from outside the vehicle. In the back door structure 1 of the present embodiment, the stopper portion 623 can prevent the side spoiler 60 from falling inward in the left-right direction.

The present invention is not limited to these examples, but is indicated by the scope of the claims, and is intended to include all modifications within the meaning and scope of equivalents of the scope of the claims.

For example, the exposed portion of the inner panel may include a support portion that connects the outer surface of the exposed portion of the inner panel and the outer surface of the reinforcing rib in the vehicle width direction to support the reinforcing rib from the outside in the vehicle width direction. . When the side spoiler is pushed from the outside by hand and the stopper portion abuts against the reinforcing rib, deformation of the reinforcing rib can be suppressed by the supporting portion. The supporting portion can be composed of, for example, triangular ribs. The support portion may be provided separately at a plurality of locations along the longitudinal direction of the reinforcing rib, or may be provided over the entire length of the reinforcing rib in the longitudinal direction.

Further, the exposed portion of the inner panel may be provided on the upper side of the inner panel, and the rear spoiler may have an upper spoiler attached to the outer surface of the exposed portion so as to form a predetermined space between the outer surface and the rear spoiler. . A reinforcing rib is provided inside the space in the exposed portion.

1 back door structure 2 back door 3 door panel 31 outer panel 311 rain gutter 32 inner panel 321 overlapping portion 322 exposed portion 323 reinforcing rib 324 through hole 4 rear glass 5 adhesive 6 rear spoiler 60 side spoiler 61 body portion 62 base portion 623 stopper portion 624 penetration hole 7 fixing member 8 weather strip 100 vehicle 110 roof 120 rear pillar 200 water droplet

Claims (1)

A vehicle back door having a resin outer panel and a resin inner panel;
a rear spoiler attached to at least one of the left and right side edges and the upper edge of the back door so as to form a predetermined space between the exterior surface and the exterior surface of the vehicle;
The outer panel and the rear spoiler are separate bodies,
The inner panel is
an exposed portion having the vehicle exterior surface exposed from the outer panel and covered with the rear spoiler;
a reinforcing rib that is provided inside the space and protrudes toward the inside of the rear spoiler from the vehicle-exterior surface of the exposed portion ;
The exposed portion is configured by projecting outward from a portion of the inner panel covered by the outer panel,
The rear spoiler covers the vehicle-exterior surface of the exposed portion and the vehicle-exterior surface including the outer peripheral edge of the outer panel.
back door structure.

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