JP2023028106A - Vehicular back door - Google Patents

Abstract

To secure rigidity of a ceiling part of a door main body, while suppressing an appearance at the inside of a vehicle interior of a back door from being impaired.SOLUTION: A vehicular back door comprises a door main body (5) formed of an inner panel (10) made of resin and an outer panel (50) made of resin which are jointed to each other. An upper part of the outer panel forms a ceiling part (7) of the door main body and constitutes a spoiler part (56) protruding rearward. A service hole (26) open toward a front-side position of a lamp unit attachment part (58) provided at a rear end portion of the spoiler part and a plurality of support ribs (28) whose tips are in contact with or are adjacent to an upper portion of the outer panel are arranged at a portion where the ceiling part of the door main body is formed in the inner panel. The support ribs are formed to extend in a longitudinal direction and stride across the service hole. The service hole is blocked with a cover member (84).SELECTED DRAWING: Figure 4

Description

The present invention relates to a vehicle backdoor.

Patent Literature 1 discloses a vehicle back door made of resin. In this back door, an outer panel having a flat portion and an inner panel having a shape-changing portion are attached together. A gap is formed between the flat portion of the outer panel and the shape-changing portion of the inner panel. A reinforcing plate is attached to the flat portion of the outer panel on the void portion side. A rib extending toward the reinforcing plate is provided on the void portion side of the shape-changing portion of the inner panel.

JP 2014-213673 A

In the back door of Patent Document 1, when the flat portion of the outer panel bends toward the gap, the reinforcing plate appears to be supported by the ribs. However, since the rib is a protrusion extending in the vehicle width direction and protruding upward and obliquely rearward, it is unsatisfactory as a structure for restricting downward bending of the flat portion of the outer panel. Therefore, it is conceivable to provide ribs extending in the front-rear direction to strengthen the structure that restricts the bending of the outer panel with the ribs, thereby ensuring the rigidity of the ceiling portion of the door body. However, if the rib is provided so as to extend in the front-rear direction, sink marks may occur on the surface of the inner panel, deteriorating the appearance of the interior of the back door.

SUMMARY OF THE INVENTION It is an object of the present invention to ensure the rigidity of the ceiling portion of the door body while suppressing deterioration of the appearance of the back door on the interior side of the vehicle.

In order to achieve the above object, in the present invention, a rib that supports the ceiling of the outer panel is provided so as to extend in the front-rear direction, and a service hole and a cover member that closes the service hole are used to make the inner panel by the rib. to reduce sink marks and make the ribs themselves less visible.

Specifically, the first invention is directed to a vehicle back door provided with a door body formed by joining a resin inner panel and a resin outer panel. In the vehicle back door according to the first invention, the upper portion of the outer panel forms the ceiling portion of the door body and constitutes a rearward projecting spoiler portion, and a high mount stop is provided at the rear end portion of the spoiler portion. A lamp unit mounting portion is provided for mounting the lamp unit. The portion of the inner panel that forms the ceiling portion of the door body includes a service hole that opens toward the front position of the lamp unit mounting portion, and a plurality of support ribs whose tips are in contact with or close to the upper portion of the outer panel. is provided. The support rib is formed so as to extend in the front-rear direction and straddle the service hole. The service hole is closed with a cover member.

A second aspect of the present invention is the vehicle back door according to the first aspect of the invention, wherein a cutout portion is provided at an intermediate portion in the front-rear direction of the support rib, the tip of which is recessed from the upper portion of the outer panel. is the door.

In the first invention, the plurality of support ribs are provided so as to extend in the front-rear direction in the portion of the inner panel that forms the ceiling portion of the door body. The tip of each of these support ribs abuts or approaches the upper portion of the outer panel. As a result, the downward bending of the upper portion of the outer panel can be restricted by the plurality of supporting ribs. Also, the support rib is formed so as to straddle the service hole. This reduces the number of sink marks on the inner panel due to the provision of the support ribs. The service hole is then closed with a cover member. The portion of the support rib that straddles the service hole is hidden from the interior of the vehicle by a cover member. Therefore, it is possible to ensure the rigidity of the ceiling portion of the door body while suppressing deterioration of the appearance of the back door on the inside of the passenger compartment.

In the second aspect of the invention, the recessed portion having the tip recessed is provided in the intermediate portion in the front-rear direction of the support rib. Sink marks may occur due to the support ribs provided on the inner panel other than the service holes. In order to hide the sink marks with the cover member, it is necessary to increase the width of the cover member in the front-rear direction. On the other hand, if the support rib is provided with the cutout portion, the height of the support rib is lowered at the cutout portion of the support rib, and the width of the root portion of the support rib can be narrowed. As a result, it is possible to suppress the occurrence of sink marks on the inner panel, so that the width of the cover member in the front-rear direction does not need to be increased. In addition, the missing part of the support rib can be used as a space for passing the harness connected to the tail lamp, the rear anchor, etc. in the left-right direction.

1 is an exploded perspective view of a vehicle back door; FIG. It is the perspective view which looked at the upper part of the back door for vehicles from the back upper right. It is the perspective view which looked at the principal part of the inner panel from the back upper right. FIG. 3 is a cross-sectional view showing a main part of the vehicle back door taken along line IV-IV in FIG. 2; FIG. 3 is a cross-sectional view showing the main part of the vehicle back door taken along line VV in FIG. 2; FIG. 5 is a cross-sectional view showing the essential parts of the vehicle back door taken along the line VI-VI in FIG. 4;

Exemplary embodiments are described in detail below on the basis of the drawings. In the following embodiments, for convenience of explanation, the front side in the longitudinal direction of the vehicle will be referred to as "front", the rear side in the vehicle longitudinal direction will be referred to as "rear", the left side in the vehicle width direction as viewed forward of the vehicle will be referred to as "left", and the right side will be referred to as "right". ", the upper side in the vehicle height direction is called "upper", and the lower side is called "lower". Further, the back door according to this embodiment will be described on the premise that the back door opening at the rear part of the vehicle is closed, unless the open/closed state is specified.

The vehicle back door 1 of this embodiment is a back door that opens and closes vertically. The back door 1 opens and closes a back door opening provided at the vehicle rear portion of a hatchback vehicle by rotating in the vertical direction. As shown in FIG. 1, the back door 1 includes a door body 5 and a plurality of lamp units 90 as main components.

As shown in FIG. 2 , the door body 5 has a ceiling portion 7 . The ceiling portion 7 is a portion of the door body 5 that constitutes the interior ceiling of the vehicle. The ceiling portion 7 of the door body 5 is relatively long in the front-rear direction. The length Lc of the ceiling portion 7 in the front-rear direction is, for example, 300 mm or more and 450 mm or less (see FIG. 4). The door body 5 is formed by joining an inner panel 10, an outer panel 50, and a window panel 80. - 特許庁

The multiple lamp units 90 include a high mount stop lamp unit 92 and a rear lamp unit 94 . Rear lamp unit 94 includes a tail lamp and a rear anchor. 1 shows only the left rear lamp unit 94 for the sake of convenience, the back door 1 includes a pair of left and right rear lamp units 94. As shown in FIG.

<Inner panel>
The inner panel 10 is a one-piece resin panel. The inner panel 10 is molded by injection molding, for example. The inner panel 10 is made of, for example, a thermoplastic resin containing fiber reinforcement. Materials for the inner panel 10 include polypropylene glass fiber (PP-GF), polypropylene carbon fiber (PP-GF), and polypropylene with cellulose nanofiber (PP-CNF). Cellulose Nanofiber) and the like are used.

A window opening 12 is formed in the upper half of the inner panel 10 . The window opening 12 is a substantially trapezoidal opening extending in the left-right direction. A portion of the inner panel 10 above the window opening 12 (hereinafter simply referred to as an upper portion) forms a ceiling portion 7 of the door body 5 . Portions of the inner panel 10 located on both left and right sides of the window opening 12 form concave pillar portions 14 that are open rearward. A portion of the inner panel 10 below the window opening 12 (hereinafter simply referred to as a lower portion) constitutes a lower portion of the door body 5 .

An inner standing wall 16 is provided at the peripheral portion of the window opening 12 in the inner panel 10 . The inner standing wall 16 rises rearward toward the outer panel 50 side. An inner joint piece 18 is provided at the rear end of the inner standing wall 16 . The inner joint piece 18 protrudes inwardly of the window opening 12 . Furthermore, an outer standing wall 20 is provided on the outer peripheral edge of the inner panel 10 . The outer standing wall 20 rises rearward toward the outer panel 50 side. An outer joint piece 22 is provided at the rear end of the outer standing wall 20 . The outer joint piece 22 protrudes to the outer peripheral side of the inner panel 10 .

As shown in FIGS. 3 and 5, a pair of hinge mounting portions 24 are provided at the rear end portion of the upper portion of the inner panel 10 . A pair of hinge mounting portions 24 are formed on both left and right sides and are spaced apart from each other. A hinge component 100 connected to the vehicle body is fixed to the hinge mounting portion 24 from the front using fasteners 102 such as bolts. The back door 1 is attached to the vehicle body via the pair of hinge parts 100 so that it can be opened and closed. A metal insert reinforcement 25 is provided on the upper portion of the inner panel 10 to reinforce the portion including the hinge mounting portion 24 .

A service hole 26 and a plurality of support ribs 28 are further provided on the upper portion of the inner panel 10 . The service hole 26 is an opening for work such as attaching and detaching the high mount stop lamp unit 92, connecting a harness to the high mount stop lamp unit 92, maintenance work, and the like. The service hole 26 is closed from below with a cover member 84 . Each of the plurality of support ribs 28 is a protrusion for supporting an upper panel 52 forming the upper portion of the outer panel 50 .

A part mounting portion 30 to which a lamp for illuminating a license plate, a knob mechanism, and the like are mounted is provided in a lower part of the inner panel 10 near the upper center. A latch (not shown) is attached to the outer standing wall 20 forming the lower edge portion of the inner panel 10 . This latch constitutes a locking mechanism that locks the back door 1 in a closed state in cooperation with a striker provided at the lower edge of the back door opening of the vehicle body.

A reinforcing structural portion 32 that reinforces the rigidity of the inner panel 10 is provided below the component mounting portion 30 in the lower portion of the inner panel 10 . A plurality of reinforcing ribs 34 projecting rearward are provided on the reinforcing structure portion 32 . The reinforcing structure portion 32 has a convex portion that is recessed on the vehicle inner side (front side) and protrudes toward the outer panel 50 side (rear side). A recess formed on the front side of the reinforcing structure portion 32 in the inner panel 10 is closed from the front side by the cover member 86 .

<Outer panel>
The outer panel 50 is divided into upper and lower halves. The outer panel 50 is composed of an upper panel 52 and a lower panel 54 . Each of these upper panel 52 and lower panel 54 is a resin panel. The upper panel 52 and the lower panel 54 are molded by injection molding, for example. Materials for the upper panel 52 and the lower panel 54 include polypropylene talc containing talc (PP-T) and a synthetic resin obtained by mixing it with ethylene propylene diene monomer (EPDM).

As shown in FIG. 4 , the upper panel 52 faces the upper portion of the inner panel 10 . The upper panel 52 corresponds to the upper portion of the outer panel 50 . The upper panel 52 forms the ceiling portion 7 of the door body 5 and constitutes a rearward projecting spoiler portion 56 . A lamp unit mounting portion 58 is provided at the rear end portion of the spoiler portion 56 . A high mount stop lamp unit 92 is attached to the lamp unit attachment portion 58 . Upper panel 52 includes an upper panel portion 60 , a pair of side panel portions 62 and a lower panel portion 64 .

The upper panel portion 60 extends in the front, rear, left, and right directions and constitutes the outer wall of the ceiling portion 7 . A rear portion of the upper panel portion 60 forms an upper portion of the spoiler portion 56 . The pair of side panel portions 62 constitute portions extending downward at both end portions of the upper panel 52 in the left-right direction. The side panel portion 62 is formed in a substantially triangular shape when viewed from the side. Side panel portions 62 are positioned on both left and right sides of the space existing below the spoiler portion 56 . The lower panel portion 64 extends frontward, rearward, leftward, and rightward to form a lower portion of the spoiler portion 56 . A front portion of the lower panel portion 64 is folded back obliquely downward to form an upper joint piece 66 .

As shown in FIGS. 4 and 5, the outer edge portion of upper panel 52 is joined to inner panel 10 using adhesive 75 . Specifically, the front edge portion of the upper panel portion 60 and the front edge portion of each side panel portion 62 are adhered to the outer joint piece 22 of the inner panel 10 . An upper joint piece 66 forming the lower edge portion of the upper panel 52 is adhered to the inner joint piece 18 of the inner panel 10 . An internal space S is formed between the upper panel 52 and the inner panel 10 joined in this way.

The lower panel 54 faces the portion of the inner panel 10 below the window opening 12 . Lamp unit mounting portions 68 are provided on both left and right sides of the lower panel 54 . A rear lamp unit 94 is attached to the lamp unit attachment portion 68 . For example, the rear lamp unit 94 is fastened to the outer joint piece 22 of the inner panel 10 and the lower panel 54 from the front at a plurality of locations using fasteners 96 such as nuts.

A plate mounting portion 70 is provided in the central portion of the lower panel 54 . A license plate (number plate) (not shown) is attached to the plate attachment portion 70 . A lower joint piece 72 is provided at the upper edge of the lower panel 54 . The lower joint piece 72 is positioned forward via a stepped portion extending in the front-rear direction. The lower joint piece 72 extends across the upper edge of the lower panel 54 in the left-right direction.

An outer edge portion of the lower panel 54 is joined to the inner panel 10 using an adhesive 75 . Specifically, the lower joint piece 72 forming the upper edge portion of the lower panel 54 is adhered to the inner joint piece 18 of the inner panel 10 . Both left and right edge portions and a lower edge portion of the lower panel 54 are adhered to the outer joint pieces 22 of the inner panel 10 . An internal space S is formed between the lower panel 54 and the inner panel 10 joined in this manner.

The window panel 80 is a horizontally elongated panel extending over both left and right ends of the back door 1 . The window panel 80 is arranged between the upper panel 52 and the lower panel 54 to close the window opening 12 of the inner panel 10 and cover the opening of the pillar portion 14 of the inner panel 10 . The window panel 80 is made of transparent resin such as polycarbonate (PC), glass, or the like. Although not shown, a concealing layer made of black ceramics or the like is provided on the outer peripheral portion of the window panel 80 in order to conceal the joint portion with the outer panel 50 .

The outer edge portion of window panel 80 is bonded to outer panel 50 and inner panel 10 using adhesive 76 . Specifically, the upper edge portion of the window panel 80 is adhered to the upper joint piece 66 of the upper panel 52 . A lower edge portion of the window panel 80 is adhered to the lower joint piece 72 of the lower panel 54 . Both left and right edge portions of the window panel 80 are adhered to the outer joint piece 22 between the upper panel 52 and the lower panel 54 of the inner panel 10 . An internal space S is formed between the window panel 80 and the pillar portion 14 of the inner panel 10 joined in this way.

<Upper part of the inner panel>
As shown in FIGS. 3 and 4, the inner standing wall 16 provided on the upper portion of the inner panel 10 extends in the front, rear, left, and right directions, and is formed so that the thickness direction corresponds to the vertical direction. The service hole 26 is formed in the central portion of the inner standing wall 16 in the left-right direction. The service hole 26 opens forward of the lamp unit mounting portion 58 . A peripheral portion of the service hole 26 in the inner panel 10 is recessed upward. The cover member 84 is fitted into the recess 36 on the periphery of the service hole 26 to close the service hole 26 .

The plurality of support ribs 28 extend linearly in the front-rear direction and are spaced apart from each other in the left-right direction. The tip of each of these support ribs 28 abuts or approaches the upper panel 52, as also shown in FIG. When the upper panel 52 bends downward, it abuts against the support ribs 28 and is supported. This restricts the downward deflection of the upper panel 52 . Among the plurality of support ribs 28 , some support ribs 28 (three in this example) located in the middle in the left-right direction are formed so as to straddle the service hole 26 . Service holes 26 are bounded by support ribs 28 .

The support ribs 28 are also formed on the left and right edges of the service hole 26 . The support ribs 28 formed on the left and right edges of the service hole 26 correspond to the recesses 74 on the periphery of the service hole 26 and are positioned to overlap the cover member 84 . A missing portion 38 is provided at a portion corresponding to the service hole 26 and at an intermediate portion in the front-rear direction of each support rib 28 positioned at the edge of the service hole 26 . The cutout portion 38 is formed in a concave shape such that the tip thereof is downwardly separated from the upper panel 52 .

A portion of the inner panel 10 on the front side of the service hole 26 corresponds to the missing portion 38 in the direction Dm in which the inner panel 10 is molded (an oblique direction from the front lower side to the rear upper side in this example). Reinforcement ribs 40 are provided on both sides of the missing portion 38 of each support rib 28 . The reinforcing ribs 40 protrude from both left and right sides of the support ribs 28 and extend in the drawing direction Dm during molding of the inner panel 10 over the entire height direction of the support ribs 28 . A lower end portion of the reinforcing rib 40 on the front side is connected to the bent portion of the inner panel 10 . A lower end portion of the rear reinforcing rib 40 corresponds to the service hole 26 or the edge of the service hole 26 .

A harness 98 for supplying power to the lamp units 90 such as the high mount stop lamp unit 92 and the rear lamp unit 94 is laid in the inner space S between the outer panel 50 and the window panel 80 and the inner panel 10 . The harness 98 is pulled into the internal space S through the grommet 44 from the opening 42 formed in the outer standing wall 20 at the upper portion of the inner panel 10 . The harness 98 is stretched in the left-right direction through the missing portion 38 of the support rib 28 at the upper portion of the inner panel 10 .

- Features of the embodiment -
In the back door 1 of this embodiment, a plurality of support ribs 28 are provided so as to extend in the front-rear direction in a portion of the inner panel 10 forming the ceiling portion 7 of the door body 5 . The tip of each support rib 28 abuts or approaches the upper panel 52 . As a result, the downward bending of the upper panel 52 can be restricted by the plurality of support ribs 28 . Also, the support rib 28 is formed so as to straddle the service hole 26 . As a result, the number of sink marks on the inner panel 10 due to the provision of the support ribs 28 is reduced. The service hole 26 is closed with the cover member 84 . The portion of the support rib 28 that straddles the service hole 26 is hidden from the interior of the vehicle by a cover member 84 . Therefore, the rigidity of the ceiling portion 7 of the door body 5 can be ensured while suppressing deterioration of the appearance of the back door 1 on the inside of the passenger compartment.

In the back door 1 of this embodiment, a recessed portion 38 having a recessed tip is provided at an intermediate portion of the support rib 28 in the front-rear direction. The provision of the support ribs 28 on the inner panel 10 other than the service holes 26 may cause sink marks. In order to hide the sink marks with the cover member 84, it is necessary to increase the width of the cover member 84 in the front-rear direction. On the other hand, if the support rib 28 is provided with the cutout portion 38, the height of the support rib 28 is lowered at the portion where the cutout portion 38 of the support rib 28 is provided, and the width of the root portion of the support rib 28 can be narrowed. . As a result, it is possible to suppress the occurrence of sink marks on the inner panel 10, so that the width of the cover member 84 in the front-rear direction does not have to be increased. Further, the missing portion 38 of the support rib 28 can be used as a space for passing a harness 98 connected to a tail lamp, a rear anchor, or the like in the left-right direction.

In the back door 1 of this embodiment, the lower end portion of the reinforcing rib 40 on the front side is connected to the bent portion of the inner panel 10 . According to this, even if a sink mark occurs in the inner panel 10, it can be made inconspicuous by providing the reinforcing rib 40 on the front side. Also, the lower end portion of the rear reinforcing rib 40 corresponds to the service hole 26 or the edge of the service hole 26 . According to this, by providing the reinforcing rib 40 on the rear side, it is possible to prevent sink marks from occurring.

Thus, the preferred embodiment has been described as an illustration of the invention. However, the present invention is not limited to this, and can also be applied to embodiments in which modifications, replacements, additions, omissions, etc. are made as appropriate. It should be understood by those skilled in the art that each of the above-described embodiments is an example, and that each component thereof can be further modified in various ways, and that such modifications also belong to the scope of the present invention.

For example, the above embodiment may be configured as follows.

In the above-described embodiment, the aspect in which the support ribs 28 are provided on the front side of the spoiler portion 56 is shown in FIG. 4 and described, but the present invention is not limited to this. The support rib 28 may be provided so as to enter the inside of the spoiler portion 56 .

Although the cutout portion 38 is formed in the support rib 28 in the above embodiment, the present invention is not limited to this. The support rib 28 may not have the cutout portion 38 formed therein, and the upper edge of the support rib 28 may be in contact with or close to the lower surface of the upper panel 52 over the entire front-rear direction.

In the above embodiment, the outer panel 50 is composed of two divided bodies, the upper panel 52 and the lower panel 54, but the invention is not limited to this. The outer panel 50 may be composed of a single panel.

INDUSTRIAL APPLICABILITY As described above, the present invention is useful for vehicle back doors.

1 Back Door 5 Door Body 7 Ceiling Part 10 Inner Panel 26 Service Hole 28 Support Rib 38 Missing Part 50 Outer Panel 56 Spoiler Part 58 Lamp Unit Mounting Part 84 Cover Member 92 High Mount Stop Lamp Unit

Claims (2)

Equipped with a door body (5) formed by bonding a resin inner panel (10) and a resin outer panel (50),
The upper portion of the outer panel (50) forms the ceiling portion (7) of the door body (5) and constitutes a spoiler portion (56) protruding rearward. A vehicle back door provided with a lamp unit mounting portion (58) for mounting a high mount stop lamp unit (82),
A portion of the inner panel (10) forming the ceiling portion (7) of the door body (5) includes a service hole (26) opened toward the front position of the lamp unit mounting portion (58), is provided with a plurality of support ribs (28) in contact with or close to the upper portion of the outer panel (50),
The support rib (28) is formed to extend in the front-rear direction and straddle the service hole (26),
A back door for a vehicle, wherein the service hole (26) is closed by a cover member (84). In the vehicle back door according to claim 1,
A vehicular bag characterized by the fact that a cutout portion (38) formed in a recessed shape whose tip is recessed away from the upper portion of the outer panel (50) is provided at an intermediate portion in the front-rear direction of the support rib (28). door.

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