JP6884463B2 - back door - Google Patents

Description

The present invention relates to a resin back door, and more particularly to a back door in which the back door inner panel is made of resin.

It is known that the back door is made of resin. For example, Patent Document 1 is for a vehicle having a resin back door panel having an opening formed and a back window glass whose peripheral edge is joined around the opening so as to close the opening of the back door panel. The resin back door structure is disclosed.

When the back door is made of resin, the problem is the improvement of the rigidity of the back door panel. For example, in Patent Document 2, a resin back door panel having a first opening and a peripheral edge portion forming the first opening portion formed in a closed cross-sectional shape is fixed in the closed cross section of the peripheral edge portion. At the same time, the peripheral portion is joined to the peripheral portion including a metal bracket partially exposed from the second opening formed in the peripheral portion and a part of the bracket exposed from the second opening. The resin back door structure for vehicles is shown. This is an invention for improving the strength of the window frame portion of the resin back door panel.

Japanese Unexamined Patent Publication No. 2014-76707 Japanese Unexamined Patent Publication No. 2016-30586

For resin back doors, it is important to improve the strength of the frame portion of the window frame, but it is also important to improve the rigidity of the door body. Since the door body has a large area, if it is configured as an integral part of resin, it will break when it is lifted for transportation on the production line or when the door is opened during use. There was a problem that

The present invention has been conceived in view of the above problems, and provides a back door in which the strength of the main body portion of the resin back door inner panel is improved.

Specifically, the back door according to the present invention is
A back door composed of a back door inner panel, a back door outer panel, and a back door glass.
The backdoor inner panel is
Diagonal beads provided on the left and right from the lock mechanism mounting part to the left and right damper stay mounting parts,
A first adhesive surface with the back door outer panel that intersects the diagonal bead and extends in the vehicle width direction.
It has a second adhesive surface with the back door outer panel provided in an annular shape so as to surround the license plate portion.
The first adhesive surface is formed on two upper and lower surfaces, and is formed in an annular shape by being bridged outside the diagonal bead .
The second adhesive surface, characterized that you connected in the vertical direction on the first adhesive surface.

In addition to the above configuration, the back door according to the present invention has a structure.
With the pull handle mounting recesses provided on the left and right lower end surfaces,
It is characterized by having a vertical bead provided in the vertical direction from the pull handle mounting recess toward the diagonal bead.

The back door according to the present invention has a diagonal bead from the lower center of the back door inner panel to the vicinity of the window frame, pull handle mounting recesses on the left and right sides of the lower end of the back door, and a vertical bead from the pull handle mounting recess toward the diagonal bead. Therefore, it was possible to improve the rigidity of the backdoor inner panel in the same way as the structure in which the kasugai was fixed with vertical beads was added.

In addition, since the joint surface with the back door outer panel is arranged so as to interfere with the diagonal bead, the stress applied to the diagonal bead is transmitted to the back door outer panel, and the stress applied to the back door is transmitted not only to the back door inner panel but also to the back. It could be dispersed to the door outer panel, and the strength could be improved.

It is a figure which shows the structure of the back door of this invention. It is a figure which shows the back door inner panel of the back door which concerns on this invention. It is an enlarged view of the part of the vertical bead of FIG. It is an enlarged view of the oblique bead of FIG. 2 and the first adhesive surface.

The back door according to the present invention will be described below with reference to the drawings. The following description exemplifies one embodiment of the present invention, and the present invention is not limited to the following description. Therefore, the following description can be modified without departing from the spirit of the present invention.

FIG. 1 shows a back door 10 according to the present invention. The back door 10 is composed of a back door inner panel 12, a back door outer panel 14, and a back door glass 16. The back door inner panel 12 is an integral body made of resin. The back door outer panel 14 is made of a metal plate. The back door outer panel 14 may be composed of two members, an upper member and a lower member.

FIG. 2 shows the back door inner panel 12. FIG. 2 shows a back door inner panel 12 when viewed from the rear of the vehicle, in which the back door outer panel 14 and the back door glass 16 have been removed. The backdoor inner panel 12 is integrally formed with an opening 20 for a window and a portion corresponding to a window frame portion 22 and a body portion 24 surrounding the opening 20.

A lock mechanism mounting portion 30 is formed in the lower center of the back door inner panel 12. This part is provided with an opening for arranging the lock mechanism inside the vehicle. Recesses 32 for mounting the pull handle are formed adjacent to the left and right sides of the lock mechanism mounting portion 30. The pull handle is a handle portion on which a finger is caught when the back door 10 is opened. The lock mechanism is a shape that protrudes from the inside of the vehicle to the outside of the vehicle. Therefore, the back door inner panel 12 is provided with an opening from the outside of the vehicle to the inside of the vehicle.

Damper stay mounting portions 34 are formed on both sides of the lower end of the window frame portion 22. This is to facilitate opening and closing of the back door 10. In the back door inner panel 12 according to the present invention, diagonal beads 40 are formed from the lock mechanism mounting portion 30 provided at the lower center toward the left and right damper stay mounting portions 34. The diagonal bead 40 is a concave bead in FIG. That is, it is a bead having a convex shape from the outside of the vehicle body toward the inside of the vehicle body.

Then, the vertical bead 42 is formed from the vicinity of the pull handle mounting recess 32 toward the middle of the diagonal bead 40. The vertical bead 42 is also a concave bead in FIG. Here, it suffices that the force can be transmitted by the rib to the vicinity. The same applies to the vertical bead 42 and the diagonal bead 40. This is because both the diagonal bead 40 and the vertical bead 42 have a structure for strengthening the structure, and it is necessary to improve the strength that the force can be transmitted by the wall (rib) forming the convex or concave shape.

The vertical bead 42 may be formed with a support portion 44 for a vehicle mounting jig. FIG. 3A shows an enlarged view of the portion of the vertical bead 42 of FIG. Further, FIG. 3B shows a cross section taken along the line AA of FIG. 3A. The support portion 44 of the vehicle mounting jig is an oblong columnar protrusion that rises from the bottom surface 42a of the vertical bead 42 (concave bead in FIG. 2) and is provided with a through hole 44h.

See FIG. 2 again. An adhesive surface 46 with the back door outer panel 14 (see FIG. 1) is formed on the body portion 24 of the back door inner panel 12. The adhesive surface 46 is provided with a substantially central portion of the body portion 24 in the vehicle width direction. In FIG. 2, an annular adhesive region is provided on the upper portion of the license plate portion 50 to which the license plate is attached. These are referred to as a first adhesive surface 46 or a body adhesive surface 46. The first adhesive surface 46 intersects the left and right diagonal beads 40.

The term "intersecting" here means that the first adhesive surface 46 does not have to intersect as a form, as long as the stress can be transmitted to the oblique bead 40. For example, it may just be connected. In other words, the first adhesive surface 46 and the oblique bead 40 may interfere with each other.

FIG. 4 shows an enlarged view of a portion between the oblique bead 40 and the first adhesive surface 46. FIG. 4A is a case of the same rear view of the vehicle as in FIG. FIG. 4B is a view when the back door inner panel 12 is viewed from the inside of the vehicle. With reference to FIG. 4A, the oblique bead 40 is a concave bead, and the first adhesive surface 46 is formed as a convex bead. Therefore, a wall portion 40a is formed at the intersecting portion so as to block the oblique bead 40.

When the portion of FIG. 4 (a) is viewed from the inside of the vehicle with reference to FIG. 4 (b), a part of the diagonal bead 40 that looks like a convex bead is recessed to form an intersecting portion of the first adhesive surface 46. .. Here, at the intersection with the diagonal bead 40, a vertical wall (rib) 40b is formed so that the diagonal bead 40 is continuous. The vertical wall 40b continuously maintains the longitudinal rigidity of the oblique bead 40.

With reference to FIG. 2 again, the adhesive surface of the back door outer panel 14 (see FIG. 1) is not only the first adhesive surface 46 but also the annular second adhesive surface 48 (license plate adhesive surface 48) so as to surround the license plate portion 50. Also called.) Is also formed. The second adhesive surface 48 is formed as a convex bead in FIG. The second adhesive surface 48 does not intersect the oblique bead 40.

Further, the second adhesive surface 48 is in contact with the first adhesive surface 46 in the vertical direction of the back door inner panel 12. Communicating here means that they have a common area with each other, in other words, they may interfere with each other.

Next, the operation of the backdoor inner panel 12 having such a structure will be described. The back door inner panel 12 according to the present invention has an oblique bead 40 extending obliquely from the lock mechanism mounting portion 30 toward the damper stay mounting portion 34. Therefore, the body portion 24 of the backdoor inner panel 12 has high rigidity together with the rib structure of the edge portion.

Further, since the pull handle mounting recesses 32 are provided on the left and right sides of the lower portion of the body portion 24, the ridgeline is increased and the rigidity of this portion is increased. Further, by providing the pull handle mounting recesses 32 on the left and right, the balance of rigidity can be ensured. Of course, the back door 10 can be opened from either the left or right side.

Further, a vertical bead 42 was formed from the pull handle mounting recess 32 to the diagonal bead 40. As a result, it was possible to secure the rigidity against the “K” shape that was likely to occur in the resin backdoor inner panel 12.

A support portion 44 of a vehicle mounting jig is arranged in the vertical bead 42. This is a through hole into which a hook for fixing is inserted when moving the back door inner panel 12 on the production line. Therefore, in the production line, the back door inner panel 12 is lifted only by the support portion 44 of the vehicle mounting jig and is subjected to strong stress. However, since the vertical bead 42 contributes to the improvement of the rigidity of the support portion 44, it is possible to avoid a problem that the support portion 44 is cracked.

Further, the first adhesive surface 46 intersects the oblique bead 40 and extends in the vehicle width direction. By strongly adhering to the back door outer panel 14, the stress applied to the back door inner panel 12 is transmitted to the back door outer panel 14 to disperse the stress. That is, the stress of the back door inner panel 12 is also borne by the back door outer panel 14. As a result, the rigidity of the back door 10 as a whole could be increased.

In particular, since the first adhesive surface 46 intersects (interferes with) the diagonal bead 40, which is the main bead, at the body portion 24 of the backdoor inner panel 12, the stress applied to the backdoor inner panel 12 is the first from the diagonal bead 40. 1 It is transmitted to the adhesive surface 46 and is effectively transmitted to the back door outer panel 14. Further, since the first adhesive surface 46 has an annular shape, a wide area can be covered with a small number of adhesive surfaces (the inside of the annular surface does not require an adhesive).

For example, the pull handle mounting recess 32 is connected to the diagonal bead 40 via the vertical bead 42. Therefore, when a force is applied to the pull handle, stress is transmitted from the vertical bead 42 through the diagonal bead 40 to the back door outer panel 14. The resulting stress is dispersed.

In addition, an annular second adhesive surface 48 is also provided around the license plate portion 50. The license plate is bolted to the license plate portion 50 of the back door inner panel 12 through the back door outer panel 14. Here, chattering due to improper fastening tends to generate noise. However, by adhering the periphery of the license plate portion 50 to the back door outer panel 14 on the second adhesive surface 48, the generation of chattering noise is suppressed.

Further, since the second adhesive surface 48 is also provided in an annular shape, the adhesive surface can be formed at a place where a sudden step is avoided. A license plate lighting device is installed around the license plate unit 50. These luminaires are often provided in a portion protruding from the upper end of the license plate in the shape of an eaves. In the vicinity of such an eaves shape, a sharp step is formed on the back door outer panel 14. By forming the second adhesive surface 48 into an annular shape, it is possible to form an adhesive surface while avoiding such a sudden step, and the structure is such that adhesion failure is unlikely to occur.

Further, the first adhesive surface 46 and the second adhesive surface 48 are connected. Therefore, the stress transmitted from the oblique bead 40 is borne not only by the back door outer panel 14 that is adhered to the first adhesive surface 46 but also by the back door outer panel 14 around the license plate, so that the stress can be further dispersed. ..

As described above, in the back door according to the present invention, the bead for improving the rigidity is arranged on the resin back door inner panel, which tends to lack the rigidity, in order to improve the rigidity. Furthermore, the stress applied to the backdoor inner panel is effectively transmitted to the outer panel to disperse the stress.

The present invention can be suitably used for a back door using a resin back door inner panel.

10 Backdoor 12 Backdoor Inner panel 14 Backdoor Outer panel 16 Backdoor glass 20 Opening 22 Window frame part 24 Body part 30 Lock mechanism mounting part 32 Pull handle mounting recess 34 Damper stay mounting part 40 Diagonal bead 40a Wall part 40b Vertical wall 42 Vertical bead 42a Bottom surface 44 Support portion 44h Through hole 46 First adhesive surface 48 Second adhesive surface 50 License plate portion

Claims (2)

A back door composed of a back door inner panel, a back door outer panel, and a back door glass.
The backdoor inner panel is
Diagonal beads provided on the left and right from the lock mechanism mounting part to the left and right damper stay mounting parts,
A first adhesive surface with the back door outer panel that intersects the diagonal bead and extends in the vehicle width direction.
It has a second adhesive surface with the back door outer panel provided in an annular shape so as to surround the license plate portion.
The first adhesive surface is formed on two upper and lower surfaces, and is formed in an annular shape by being bridged outside the diagonal bead .
The back door second adhesive surface, characterized that you connected in the vertical direction on the first adhesive surface. The backdoor inner panel further
With the pull handle mounting recesses provided on the left and right lower end surfaces,
The back door according to claim 1, further comprising a vertical bead provided in the vertical direction from the pull handle mounting recess toward the diagonal bead.

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