JP6956441B2 - Vehicle backdoor structure - Google Patents

Description

The present invention relates to a back door structure of a vehicle such as an automobile.

As an example of the back door structure of a vehicle, there is one described in Patent Document 1.
In the structure described in the document, the upper part of the back door of the vehicle is rotatably connected to the rear part of the vehicle body such as the roof part. On the other hand, the middle part of the back door in the vertical height direction is connected to the rear part of the vehicle body via a damper stay. According to such a configuration, the weight of the back door is received by the damper stay, and the opening and closing operation of the back door can be smoothly performed with a light operating force.

In Patent Document 1, a reinforcing member is provided on the back door as a means for suppressing stress concentration from occurring at the damper stay connecting portion of the back door and avoiding damage to this portion.

However, according to the above-mentioned means, there is room for improvement as described below.

That is, in the past, since a reinforcing member is merely used as a means for reinforcing the damper stay connecting portion of the back door, it is necessary to use a large size and heavy reinforcing member, or many reinforcing members are used. Need arises. Therefore, the weight of the entire back door, and eventually the weight of the entire vehicle, increases. In addition, the productivity is poor and the manufacturing cost is high.
Further, in the back door, not only a large stress is generated in the damper stay connecting portion described above, but also a large stress is generated in the vehicle body connecting portion for rotatably connecting the upper part of the back door to the vehicle body. Therefore, it is required to appropriately reinforce such a portion, but the structure described in Patent Document 1 cannot appropriately respond to such a request.

Japanese Unexamined Patent Publication No. 2012-131374

The present invention has been conceived under the above-mentioned circumstances, and is capable of efficiently improving the strength of the back door while suppressing an increase in weight and manufacturing cost. The challenge is to provide a backdoor structure.

In order to solve the above problems, the following technical measures are taken in the present invention.

The vehicle back door structure provided by the present invention includes a back door formed by joining an inner panel and an outer panel, and a back door provided above the back door and at the rear of the vehicle body by the back door. A vehicle body connecting portion that rotatably connects the back door to the vehicle body so that the opening can be opened and closed, and a damper plate provided in the middle of the inner panel in the vertical height direction and one end of which is connected to the vehicle body. A step of a vehicle back door structure including a damper stay connecting portion to which the other end portion of the vehicle is connected, which protrudes toward the inner panel side and has a concave groove on the outer surface side. A push portion is provided, and the step push portion bridges between the portion of the outer panel facing the vehicle body connecting portion or its vicinity and the portion facing the damper stay connecting portion or its vicinity. The portion of the upper part of the outer panel facing the vehicle body connecting portion is a bulge that partially bulges toward the rear side of the vehicle as compared with other general parts of the upper part of the outer panel. The bulging portion is formed as a protruding portion, the bulging portion is adjacent to the upper portion of the step pushing portion, and the upright wall portion which is a part of the bulging portion is connected to the side wall portion of the concave groove of the step pushing portion. In a region having a height lower than the bulging portion of the outer panel, the vertical portion is located at a position separated inward in the vehicle width direction from the step pushing portion and stands up in the depth direction of the concave groove. A convex step portion composed of a wall portion, a side wall portion on the inner side in the vehicle width direction of the concave groove, and a connecting portion connecting these side wall portions and the end portions of the vertical wall portion on the rear side of the vehicle. It is characterized by being provided.

According to such a configuration, the following effects can be obtained.
First, among the back doors, the vicinity of the vehicle body connecting portion where a large stress is likely to be generated and the vicinity of the damper stay connecting portion can be bridged and reinforced by the stepped portion of the outer panel. Therefore, for example, as compared with the case where each of the vehicle body connecting portion and the damper stay connecting portion is simply reinforced individually, the entire back door can be effectively reinforced and the strength of the entire back door can be accurately increased. ..
Secondly, since a means for providing a stepped push portion on the outer panel is adopted as a means for reinforcing the back door, unlike a means for using a reinforcing member, the weight of the back door is reduced, productivity is improved, and manufacturing cost is reduced. It is also possible to reduce the cost.
Thirdly, unlike the above-mentioned configuration of the present invention, for example, when the step push portion is provided on the inner panel, there is a possibility that this step push portion may hinder the provision of the damper stay connecting portion on the inner panel. However, according to the configuration of the present invention in which the step pushing portion is provided on the outer panel, such a possibility can be appropriately avoided.
Fourth, the concave groove of the stepped push portion provided on the outer panel can be used as a rain guide as described later, and can be used to prevent water from entering the vehicle interior when the back door is opened. ..

In the present invention, preferably, the back door includes an open window portion and a glass that closes the window portion, and a part of the concave groove of the step pushing portion is covered with the glass. At the same time, the other part of the concave groove is covered with a design member attached to the back door in a state adjacent to the glass, and the end portion of the design member is in the concave groove rather than the glass. We are entering a deep position.

According to such a configuration, since the concave groove of the stepped portion is covered with glass, the concave groove can be used more appropriately as the rain guide described above. Further, since the end portion of the design member adjacent to the glass has entered a deeper position in the concave groove than the glass, the respective end portions of the design member and the glass are invisible from the outside. It is also possible to improve the appearance of these.

Other features and advantages of the present invention will become more apparent from the following description of embodiments of the invention with reference to the accompanying drawings.

It is a front view of the vehicle rear view which shows an example of the back door structure of the vehicle which concerns on this invention. It is sectional drawing of the main part II-II of FIG. FIG. 3 is a cross-sectional view taken along the line III-III of FIG. It is a main part perspective view of the outer panel used in the back door structure of the vehicle shown in FIG.

Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.
In the drawings, the arrow Fr indicates the front of the vehicle, the arrow W indicates the vehicle width direction, and the arrow Up indicates the upper direction in the vehicle height direction.

The vehicle back door structure A shown in FIGS. 1 and 2 includes a back door BD for opening and closing the back door opening 10 provided at the rear of the vehicle body 1. The back door BD includes a vehicle body connecting portion 5, a damper stay connecting portion 6, a step pushing portion 20 forming a concave groove 20a, and a side spoiler 7. The side spoiler 7 corresponds to a specific example of the "design member" in the present invention.

The back door BD is configured by combining the outer panel 2 and the inner panel 3. An opening-shaped window portion 40 is formed in the region near the upper part of the back door BD, and the window portion 40 is closed by the glass 4.

The vehicle body connecting portion 5 is a portion for rotatably connecting the upper portion of the back door BD to the roof portion 11, and the bracket 50 through which the rotary support shaft 51 held by the bracket 12 attached to the roof portion 11 is inserted. It is the mounting part of. The bracket 50 is attached to the upper part of the inner panel 3.

The damper stay connecting portion 6 is provided in the middle of the inner panel 3 in the vertical height direction so as to be located below the vehicle body connecting portion 5, and one end thereof is the other end of the damper stay 8 connected to the vehicle body 1. It is a mounting portion of the connector 60 connected to the portion. In FIG. 1, the vehicle body connecting portion 5 and the damper stay connecting portion 6 are shown in a simplified manner, but as shown in the figure, the vehicle body connecting portion 5 and the damper stay connecting portion 6 are separated from each other in the vehicle width direction. There are two pairs on each side.

As shown in FIG. 4, the step pushing portion 20 (halftone dot pattern portion) is provided on the outer panel 2. The step pushing portion 20 is a portion that protrudes toward the inner panel 3 side (front side of the vehicle) and has a concave groove 20a on the outer surface side (rear surface side) of the outer panel 2, and can be formed by press working. Also in FIG. 4, similarly to FIG. 1, the positions of the vehicle body connecting portion 5 and the damper stay connecting portion 6 are shown in a simplified manner. As can be understood from FIGS. 4 and 1, the step pushing portion 20 includes a portion of the outer panel 2 facing the vehicle body connecting portion 5 or a portion thereof, and a portion facing the damper stay connecting portion 6 or a portion thereof in the vicinity thereof. It is provided in a series extending in the vertical height direction so as to bridge the space. Since the vehicle body connecting portion 5 and the damper stay connecting portion 6 are provided in pairs on the left and right, the step pushing portion 20 is also provided in pairs on the left and right.

Preferably, the step pushing portion 20 is provided so that the upper portion faces the vehicle body connecting portion 5 and the lower portion faces the damper stay connecting portion 6. However, the present invention is not necessarily limited to this, and for example, the upper portion of the step-pushing portion 20 and the vehicle body connecting portion 5 are slightly displaced in the vehicle width direction, and the lower portion of the step-pushing portion 20 and the damper stay connecting portion 6 are the vehicle width. The configuration may be slightly displaced in the direction.

In FIG. 3, the end portion 4a of the glass 4 in the vehicle width direction is arranged so as to cover the inner side portion of the concave groove 20a in the vehicle width direction. In this case, the adhesive 48 for joining the glass 4 to the outer panel 2 can be arranged in the concave groove 20a. On the other hand, the side spoiler 7 is attached to the outer panel 2 so as to be adjacent to the outer side of the glass 4 in the vehicle width direction. The side spoiler 7 covers the outer side portion of the concave groove 20a in the vehicle width direction, and the end portion 70 of the side spoiler 7 penetrates deeper into the concave groove 20a than the glass 4.

Next, the operation of the back door structure A of the vehicle described above will be described.

First, the stepped push portion 20 provided on the outer panel 2 is a portion having higher rigidity than the general cross-sectional portion of the outer panel 2, but in the present embodiment, a large stress is likely to be generated in the back door BD. The vicinity of the vehicle body connecting portion 5 and the vicinity of the damper stay connecting portion 6 are bridged and reinforced by the step pushing portion 20. Since the step pushing portion 20 does not individually reinforce each of the vehicle body connecting portion 5 and the damper stay connecting portion 6, but integrally reinforces the two regions in association with each other, the overall rigidity of the back door BD is increased. Can be effectively increased. Therefore, it is possible to make it difficult for the back door BD to be significantly distorted.

As described above, the step pushing portion 20 can be easily provided by pressing the outer panel 2. Therefore, unlike the case where the back door BD is reinforced by using only the reinforcing member, it is possible to reduce the weight of the back door, improve the productivity, and reduce the manufacturing cost.

The concave groove 20a of the step pushing portion 20 can be used as a rain guide, and is used to prevent rainwater adhering to the outer surface of the back door BD from flowing into the vehicle interior when the back door BD is opened. It is also possible. In the present embodiment, the glass 4 and the side spoiler 7 are adjacent to each other, but the end portion 4a of the glass 4 can be hidden by the side spoiler 7 so as not to be seen from the outside. Further, since the end portion 70 of the side spoiler 7 penetrates deeper into the concave groove 20a than the glass 4, the end portion 70 of the side spoiler 7 can also be hidden from the outside. Therefore, the attached state of the glass 4 and the side spoiler 7 can be made to look good.

The present invention is not limited to the contents of the above-described embodiments. The specific configuration of each part of the back door structure of the vehicle according to the present invention can be variously redesigned within the scope intended by the present invention.

The stepped portion referred to in the present invention may be in a form in which the stepped portion projects toward the inner panel side and the outer surface side opposite to the stepped portion has a concave groove, and the front view is linear, bent, or curved. It may be either. Further, the depth and width of the concave groove of the stepped portion may be non-uniform in various places. The point is that the outer panel extends in a series (continuously) so as to bridge between the part facing the vehicle body connecting part or its vicinity and the part facing the damper stay connecting part or its vicinity. It suffices if it is provided on the outer panel. The specific configuration of the vehicle body connecting portion and the damper stay connecting portion according to the present invention is also not limited.

The back door is not limited to the metal door, and may be a so-called resin door, and both or one of the inner panel and the outer panel may be made of resin. When the outer panel is made of resin, the step push portion can be provided by resin molding.
The design member is not limited to the side spoiler. The design member referred to in the present invention means a member that can impart designability, and even if the original function of the member does not enhance the designability, if the designability can be imparted as a result. , Included in the design members referred to in the present invention.

A Vehicle back door structure BD Back door 1 Body 10 Back door opening 2 Outer panel 20 Step push part 20a Recessed groove (of step push part)
3 Inner panel 4 Glass 40 Window part 5 Body connection part 6 Dampaste connection part 7 Side spoiler (design member)

Claims (2)

A back door formed by joining the inner panel and outer panel,
A vehicle body connecting portion provided above the back door and rotatably connecting the back door to the vehicle body so that the back door opening at the rear of the vehicle body can be opened and closed by the back door.
A damper stay connecting portion provided in the middle of the inner panel in the vertical height direction and to which the other end of the damper stee having one end connected to the vehicle body is connected.
The back door structure of the vehicle, which is equipped with
The outer panel is provided with a step push portion that protrudes toward the inner panel side and has a concave groove on the outer surface side.
The stepped pressing portion, of the outer panel, a portion or its vicinity to face the vehicle body connecting part extends in series so as to bridge between the opposing portions or its vicinity to the Danpasute connecting portion ,
The portion of the upper part of the outer panel facing the vehicle body connecting portion is formed as a bulging portion that partially bulges toward the rear side of the vehicle with respect to the other general portion of the upper part of the outer panel.
The bulging portion is adjacent to the upper part of the step pushing portion, and the upright wall portion which is a part of the bulging portion is connected to the side wall portion of the concave groove of the step pushing portion.
In the region having a height lower than the bulging portion of the outer panel, a vertical wall portion located at a position separated inward in the vehicle width direction from the step pushing portion and standing upright in the depth direction of the concave groove. A convex step portion composed of three parts, a side wall portion on the inner side in the vehicle width direction of the concave groove and a connecting portion connecting these side wall portions and the end portions on the rear side of the vehicle of the vertical wall portion, is provided. The back door structure of the vehicle, which is characterized by being present. The vehicle back door structure according to claim 1.
The back door includes an opening-shaped window portion and a glass that closes the window portion.
A part of the concave groove of the step push portion is covered with the glass, and the other part of the concave groove is covered with a design member attached to the back door in a state adjacent to the glass. Moreover, the back door structure of the vehicle, in which the end portion of the design member enters a deeper position in the recessed groove than the glass.

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