JP2023047027A - Vehicular side door structure - Google Patents

Abstract

To improve reliability of holding performance of a door latch reinforcement and a bracket for fixing an impact beam.SOLUTION: A side door 100 having a vehicular side door structure includes: a door body 1 having an inner panel 2 and an outer panel 3; a door latch 1b fixed through a door latch reinforcement 11; and an impact beam 10 having a rear end 10a fixed through a bracket 12. The inner panel 2 has: an annular wall 21; a main wall 22 at the inner side of the annular wall 21; a vertical wall 23 which connects the annular wall 21 with the main wall 22; and multiple beads B. The multiple beads B are provided spaced apart from each other in a vehicle vertical direction and extend in a wall height direction between the annular wall 21 and the main wall 22 in a portion, which is located between the door latch reinforcement 11 and the bracket 12, in a rear vertical wall 23a.SELECTED DRAWING: Figure 3

Description

The present invention relates to a vehicle side door structure including a hinged door body having an inner panel and an outer panel, a door latch and an impact beam provided in the door body.

Generally, in a hinge-openable vehicle side door, the hinge is attached to the front part of the door body, and the door latch is arranged behind the inner panel in the door body and engages with a striker on the vehicle body side to close the door. is designed to keep Also, the rear end of the impact beam is fixed to the inner panel via a bracket below the door latch. The bracket is fixed (held) to the inner panel by being joined to the inner panel by spot welding.

A structure described in Patent Document 1 is known as an example of a vehicle side door structure. The structure described in Patent Document 1 aims to alleviate the load concentration on the door latch during a side collision by breaking the inner panel with a projection provided on the window regulator during a side collision.

JP-A-9-263135

By the way, the door latch is mainly made of a resin member from the viewpoint of waterproofing. Therefore, the door latch may not have sufficient strength to withstand door opening/closing (especially door closing) or side impact when directly fixed to the inner panel. Therefore, a door latch reinforcement that serves as a base for supporting the door latch is provided between the door latch and the inner panel for reinforcement. It may be fixed to the inner panel via the door latch reinforcement. The door latch reinforcement is fixed (held) to the inner panel by, for example, being joined to the inner panel by spot welding and fastened with fasteners such as bolts. Therefore, when the door is opened and closed (especially when the door is closed), stress and load are concentrated on the joint between the door latch reinforcement and the inner panel by spot welding or bolting, resulting in peeling of the spot weld or cracking of the bolt insertion hole. may occur, resulting in a decrease in the holding force of the door latch reinforcement to the inner panel. Regarding this point, the structure of Patent Document 1 has room for improvement. The same problem also arises at the spot welding or the like between the bracket for fixing the impact beam and the inner panel.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a vehicle side door structure capable of improving the reliability of the holding performance of a door latch reinforcement and the holding performance of a bracket for fixing an impact beam.

In order to achieve the above object, according to one aspect of the present invention, a vehicle side door structure is provided. This vehicle side door structure includes a door body having an inner panel and an outer panel arranged outside the inner panel in the vehicle width direction, a hinge attached to a front portion of the door body in the vehicle front-rear direction, and a door inside the door body. a door latch fixed to the rear side of the inner panel in the vehicle front-rear direction via a door latch reinforcement; an impact beam having a rear end secured to the inner panel. In the vehicle side door structure, the inner panel includes an annular wall that faces inward in the vehicle width direction and is in contact with a weatherstrip, and an annular wall that faces inward in the vehicle width direction from the inner side of the annular wall. a main wall positioned on the inner side in the vehicle width direction; a vertical wall connecting the annular wall and the main wall; a plurality of beads spaced apart from each other in the vertical direction of the vehicle and extending in the wall height direction between the annular wall and the main wall in a portion between the reinforcement and the bracket; are doing.

In the vehicle side door structure according to one aspect of the present invention, (1) the hinge is attached to a front portion of the door body in the front-rear direction of the vehicle, and the inner panel faces inward in the vehicle width direction and has a weather strip. an annular wall that abuts against; a main wall facing inward in the vehicle width direction inside the annular wall and positioned further inward in the vehicle width direction than the annular wall; and a vertical wall connecting the annular wall and the main wall; and a plurality of beads extending in a wall height direction between the annular wall and the main wall in a rear vertical wall on a rear end side of the vertical wall in the vehicle front-rear direction. Therefore, the wall height direction between the annular wall and the main wall of the rear vertical wall, which is the direction in which each bead extends, is generally the direction of rotation of the rear end of the door body with the hinge as a fulcrum ( moving direction). That is, the plurality of beads extend so as to effectively stretch against the load in the rotational direction about the hinge, and the door body is strong against the load in the rotational direction when the door is closed. It is structured. As a result, when the door is closed, the load on the rear end side of the outer panel, which tends to move toward the interior of the vehicle in the rotational direction about the hinge due to inertia, and the rear end of the impact beam. Loads and the like can be effectively received by the rear vertical wall having the plurality of beads. (2) Furthermore, since the plurality of beads are separated from each other in the vehicle vertical direction in the portion between the door latch reinforcement and the bracket in the vehicle vertical direction on the rear vertical wall, the door latch The stiffness of the rear vertical wall between the reinforcement and the bracket is improved and the input loads and possible stresses are distributed relatively evenly. This effectively suppresses or prevents concentration of load and stress at joints between the door latch reinforcement and the inner panel and joints between the bracket and the inner panel. As a result, the reliability of the holding performance of the door latch reinforcement and the holding performance of the bracket for fixing the impact beam is enhanced.

Thus, the present invention can provide a vehicle side door structure capable of improving the reliability of the holding performance of the door latch reinforcement and the holding performance of the bracket for fixing the impact beam.

1 is a plan view of a side door to which a vehicle side door structure according to an embodiment of the invention is applied, viewed from the inside in the vehicle width direction; It is a perspective view for demonstrating the internal structure of the said side door. It is a partial perspective view containing the principal part of the said side door. It is a partial perspective view including the door latch attachment location of the said side door. 4 is a schematic cross-sectional view taken along line AA shown in FIG. 3; FIG. FIG. 4 is a conceptual diagram for explaining a spot-welded structure between the inner panel of the side door and the door latch reinforcement; FIG. 4 is a conceptual diagram of spot weld delamination in a side door of a comparative example;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a plan view of a side door 100 to which a vehicle side door structure according to an embodiment of the present invention is applied, viewed from the inside in the vehicle width direction, and FIG. 2 is for explaining the internal structure of the side door 100. is a perspective view seen from the outside in the vehicle width direction. Note that an outer panel 3, which will be described later, is removed in FIG. In the drawings, the direction of arrow Fr indicates the front of the vehicle in the longitudinal direction of the vehicle, the direction of arrow O indicates the outer side of the vehicle in the width direction of the vehicle (the width direction of the vehicle), and the direction of arrow U indicates the upper direction of the vehicle in the vertical direction of the vehicle. there is "Front" and "rear" in the following description correspond to the front and back in the longitudinal direction of the vehicle, and "top" and "bottom" correspond to the top and bottom in the vertical direction of the vehicle.

[Outline of side door]
As shown in FIGS. 1 and 2, the side door 100 includes a door body 1, a hinge 1a, a door latch 1b, an impact beam 10, and a door outer center reinforcement 30, and opens to the vehicle body side. It is a hinged door that opens and closes a portion of the door opening. In this embodiment, the side door 100 shall be a front side door. A case where the side door 100 is applied to the front side door on the left side when an occupant in the vehicle interior looks forward in the vehicle longitudinal direction will be described below.

The door body 1 has an inner panel 2 and an outer panel 3 arranged outside the inner panel 2 in the vehicle width direction. Each panel (2, 3) is formed by subjecting a thin metal steel plate to press molding or the like. The door body 1 (in other words, the inner panel 2 and the outer panel 3) has a substantially rectangular outer shape when viewed from above in the vehicle width direction. A window hole 1c is opened. Further, in a plan view in the vehicle width direction, the upper and lower rear corners (rear lower corner C1, rear upper corner C2) of the door body 1 are all formed as substantially right-angled corners, and the front lower corner C3 is formed. is rounded into an R shape. Although not shown, a trim made of resin is attached to the inner side of the door body 1 in the vehicle width direction (that is, the inner panel 2).

The hinge 1a is attached to the front portion of the door body 1 in the vehicle longitudinal direction, and connects the door body 1 to the front portion of the door opening on the side portion of the vehicle body so as to be rotatable in the vehicle width direction. That is, the front portion of the door body 1 is connected to a vehicle body (not shown) via a hinge 1a, and the side door 100 is attached to the vehicle body so as to rotate (open and close) freely in the vehicle width direction with the hinge 1a as a fulcrum. Concatenated. Specifically, two hinges 1a are attached to the front portion of the door body 1 so as to be separated from each other in the vertical direction of the vehicle, and the pivot shaft of each hinge 1a extends in the vertical direction of the vehicle.

The door latch 1b is a part that keeps the door body 1 closed by engaging with a striker S provided at the front edge of the door opening on the side of the vehicle body. It is fixed via the door latch reinforcement 11 on the rear side of the direction. Most of the door latch 1b is made of a resin member from the viewpoint of waterproofing. A door handle (not shown) is provided on the outer panel 3 of the door body 1, and when the door handle is operated, the closed state of the door is released.

The inner panel 2 is a member constituting the inner panel in the vehicle width direction of the door body 1 , and has an outer edge connected to the outer edge of the outer panel 3 . In FIG. 1, the vehicle width direction inner surface 2a of the inner panel 2 is mainly visible, and in FIG. 2, the vehicle width direction outer surface 2b of the inner panel 2 is mainly visible. A detailed structure of the inner panel 2 will be described later.

The outer panel 3 is a member that faces the vehicle width direction outer surface 2b of the inner panel 2 and constitutes the outermost wall (design surface) of the side door 100 in the vehicle width direction. The outer panel 3 is integrated with the inner panel 2 by hemming its outer edge, and cooperates with the inner panel 2 to form a closed cross-sectional structure. That is, the door body 1 is configured by connecting the outer edge portion of the inner panel 2 and the outer edge portion of the outer panel 3 to each other.

The impact beam 10 extends in the vehicle front-rear direction within the door body 1 . The impact beam 10 is a linearly extending member for suppressing deformation of the side door 100 in the event of a side collision, and is formed in a tubular shape, for example. The impact beam 10 extends over substantially the entire front-rear direction of the vehicle in the lower region inside the door body 1 . A rear end portion 10a of the impact beam 10 is fixed to the inner panel 2 (outer side surface 2b in the vehicle width direction) via a bracket 12 positioned below the door latch 1b, and a front end portion 10b of the impact beam 10 is attached to the inner panel 2, for example, on the vehicle. It is fixed via another bracket 13 to the width direction outer side surface 2b. A plurality of holes 2c are formed in the inner panel 2, and in FIG. 1, a portion of the impact beam 10 and a portion of the door outer center reinforcement 30 are visible through the holes 2c.

The door outer center reinforcement 30 extends in the vehicle front-rear direction above the impact beam 10 in the door body 1 . The door outer center reinforcement 30 is a member extending linearly to prevent the outer panel 3 forming the design surface of the side door 100 from being dented (deformed). It is formed by The door outer center reinforcement 30 extends over substantially the entire vehicle front-rear direction in the lower region inside the door body 1 and is fixed to at least the vehicle width direction inner side surface 3 a of the outer panel 3 . Specifically, the door outer center reinforcement 30 is joined to the inner side surface 3a of the outer panel 3 in the vehicle width direction at a plurality of locations in its longitudinal direction via hard sponge-like members (not shown). Further, the front end of the door outer center reinforcement 30 is spot welded to the rear surface of the front portion of the inner panel 2 (vehicle width direction outer surface 2b), and the rear end of the door outer center reinforcement 30 is spot welded. It is welded to the rear surface of the inner panel 2 (outer surface 2b in the vehicle width direction).

[Overview of inner panel]
The structure of the inner panel 2 will be described below with reference to FIGS. 1 to 5. FIG. 3 is a partial perspective view including the main part of the side door 100, FIG. 4 is a partial perspective view including the door latch mounting portion of the side door 100, and FIG. 5 is a schematic view taken along line AA shown in FIG. is a cross-sectional view of.

As shown in FIG. 1, the inner panel 2 includes an annular wall 21 inside the outer edge of the inner panel 2, a main wall 22 and a vertical wall 23 occupying most of the area below the window hole 1c in the inner panel 2. and a main part 2A consisting of

In addition to the elements (21, 2A (22, 23)), the inner panel 2 includes a panel peripheral edge portion 24 extending from the outer edge portion of itself to the annular wall 21, and a window edge portion 25 around the window hole 1c. and these (21, 22, 23, 24, 25) are integrally formed.

The annular wall 21 is a portion facing inward in the vehicle width direction inside the panel peripheral edge portion 24 and extends annularly. In other words, the annular wall 21 extends in the vehicle longitudinal direction and the vehicle vertical direction inside the panel peripheral edge portion 24 and faces the vehicle width direction inner side. Further, inside the annular wall 21, the main portion 2A (the main wall 22, the vertical wall 23) and the window edge portion 25 are located. The annular wall 21 has a flat annular surface facing inward in the vehicle width direction (vehicle interior). This annular surface constitutes a part of the inner side surface 2a of the inner panel 2 in the vehicle width direction. An elastic annular weatherstrip 26 (sealing member) is in contact with the annular wall 21 (the annular surface) from the inside in the vehicle width direction (see FIGS. 4 and 5). 1 and 3, the weather strip 26 is omitted.

That is, the annular wall 21 is a portion that forms a contact surface with which the weatherstrip 26 contacts. The annular wall 21 extends in the vicinity of the inner side of the outer edge of the inner panel 2 along the outer edge in plan view in the vehicle width direction. However, as shown in FIG. 1, the portion of the annular wall 21 inside the rear lower corner portion C1 of the door body 1 is subject to regulations such as the structure of the vehicle body side portion, and the outer edge portion (rear lower corner portion C1) It extends in front of the vehicle and largely retracts (separates) above the vehicle. A portion of the main portion 2A (the main wall 22 and the vertical wall 23) on the rear lower corner portion C1 side is also formed to be retracted.

Specifically, the rear annular wall 21a, which is the vehicle rear portion of the annular wall 21, has a bent portion 21a1 provided at a predetermined position near the intermediate position between the intermediate position and the lower end position in the vertical direction of the vehicle. , extends so as to bend forward of the vehicle. That is, the rear annular wall 21a extends generally vertically from the rear upper corner C2 side toward the bent portion 21a1, and then bends toward the front side of the vehicle at the bent portion 21a1 in a smooth R shape to extend from the bent portion 21a1. It extends linearly to a portion of the annular wall 21 below the vehicle.

The main portion 2</b>A consists of a main wall 22 and a vertical wall 23 , is continuous with the window edge 25 below the window edge 25 and is located inside the annular wall 21 . In other words, the main portion 2A is a portion that occupies most of the area below the window edge portion 25 of the inner panel 2 . The main portion 2A as a whole is formed so as to greatly bulge inward in the vehicle width direction. The main portion 2A is formed in a shape recessed inward in the vehicle width direction as a whole when viewed toward the vehicle width direction outer side surface 2b of the inner panel 2, and cooperates with the outer panel 3 to accommodate various impact beams 10 and the like. It constitutes a containment chamber that houses members and equipment.

The main wall 22 of the main portion 2A faces the inner side of the annular wall 21 in the vehicle width direction and is positioned more inwardly than the annular wall 21 in the vehicle width direction. occupies an area.

A vertical wall 23 of the main portion 2A is a portion that connects the annular wall 21 and the main wall 22 . That is, the vertical wall 23 connects between the inner edge of the annular wall 21 and the outer edge of the main wall 22, and is provided so as to fill the stepped portion between the annular wall 21 and the main wall 22 in the vehicle width direction. .

A portion of the main portion 2A inside the lower rear corner C1 of the door body 1 is also formed so as to largely retreat from the lower rear corner C1 toward the front of the vehicle and above the vehicle in accordance with the shape of the rear annular wall 21a. It is Therefore, of the vertical walls 23 of the main portion 2A, a rear vertical wall 23a, which is a portion on the rear end side in the vehicle front-rear direction, is bent in accordance with the shape of the rear annular wall 21a. That is, the rear vertical wall 23a extends so as to bend forward of the vehicle at a bent portion 23a1 provided at a predetermined position corresponding to the bent portion 21a1 of the rear annular wall 21a. Specifically, the rear vertical wall 23a extends generally vertically from the rear upper corner C2 side toward the bent portion 23a1, and then bends toward the front side of the vehicle in a smooth R shape at the bent portion 23a1. It extends linearly from the portion 23a1 to a portion of the vertical wall 23 below the vehicle.

A portion of the rear vertical wall 23a including the bent portion 23a1 is continuously connected to a portion of the rear annular wall 21a including the bent portion 21a1. Therefore, the bent portion region W corresponding to the bent portion 23a1 of the rear vertical wall 23a in the valley V, which is the corner portion where the annular wall 21 and the vertical wall 23 intersect, can be bent in the vehicle width direction. It is also bent in the longitudinal direction of the vehicle. Therefore, in the door body 1, stress and load tend to concentrate on the curved region W of the valley line V when the door is opened/closed (especially when the door is closed) or when a side collision occurs.

The panel peripheral edge portion 24 is a portion extending from the outer edge portion of the inner panel 2 to the annular wall 21 . The thickness (door thickness) of the entire door body 1 in the vehicle width direction is thick at the main portion 2A and thin at the panel peripheral edge portion 24 . That is, the outer panel 3 of the door body 1 is formed flat in the vehicle width direction without unevenness, and the inner panel 2 of the door body 1 is configured to be thin at the panel peripheral edge portion 24 in the vehicle width direction.

In addition, the portion of the panel peripheral portion 24 including the rear lower corner portion C1 spreads over a larger area than the other portions, and has a generally right-angled triangle-shaped retraction surface portion 24a in a plan view viewed from the vehicle width direction. None. The retraction surface portion 24a is located at the rear end portion of the door body 1 that rotates in the vehicle width direction about the hinge 1a, on the side opposite to the hinge 1a. This is the portion that is thin in the vehicle width direction. Therefore, the retraction surface portion 24a is a portion that is likely to sway and vibrate in the vehicle width direction or the like when the door is opened or closed.

In this embodiment, the retraction surface portion 24a is continuous with the inner annular wall 21 and forms a part of the annular wall 21 .

The window edge portion 25 is a portion that constitutes the opening edge of the window hole 1c and is positioned inside the annular wall 21 in plan view in the vehicle width direction.

[Detailed structure of side door]
Next, mainly the detailed structure of the side door 100 will be described.

[Mounting structure of door latch]
A cutout portion 2d is opened from the rear vertical wall 23a to the main wall 22 at the rear side corner portion of the main portion 2A of the inner panel 2, and the striker engaging opening portion 1b1 of the door latch 1b is formed in the cutout portion 2d. It's designed to fit. The striker S enters the striker engaging opening 1b1 and engages with the door latch 1b. The cutout portion 2d of the inner panel 2 is positioned at the rear side (rear vertical wall 23a) of the inner panel 2 in the vehicle front-rear direction, at the substantially central portion in the vehicle vertical direction.

As described above, the door latch 1b is fixed to the rear side of the inner panel 2 in the vehicle front-rear direction inside the door body 1 via the door latch reinforcement 11 . The door latch reinforcement 11 is formed by subjecting a thin metal steel plate to press molding or the like. The door latch reinforcement 11 is a base member for supporting the door latch 1b, and is provided between the door latch 1b and the inner panel 2 for reinforcement. In other words, the door latch reinforcement 11 is provided at a door latch attachment location (arrangement location) on the back surface of the inner panel 2 (an inner surface of the door body 1 including the vehicle width direction outer surface 2b of the inner panel 2). It is fixed to the inner panel 2 via the door latch reinforcement 11 .

The door latch reinforcement 11 is fixed (held) to the inner panel 2 by being spot-welded to the back surface of the inner panel 2 and fastened with fasteners T (see FIGS. 3 and 4) made up of bolts, for example. be. Fastener (bolt) insertion holes are formed in both sides of the notch 2d in the rear vertical wall 23a of the inner panel 2 in the vertical direction of the vehicle and in the door latch reinforcement 11. As shown in FIG. The door latch 1b is formed with a threaded portion that engages with the fastener T. As shown in FIG. With the end surface of the door latch 1b on the side of the inner panel 2 in contact with the door latch reinforcement 11 joined to the inner panel 2, the fastener T inserted through the fastener insertion hole is screwed into the screw portion of the door latch 1b. do. As a result, the door latch 1 b is fixed to the rear portion of the inner panel 2 in the vehicle front-rear direction via the door latch reinforcement 11 .

In this embodiment, the door latch reinforcement 11 is fixed to the rear vertical wall 23a and the main wall 22 (see FIGS. 2 to 4). Specifically, the door latch reinforcement 11 surrounds the cutout portion 2d of the inner panel 2 and is formed along the rear vertical wall 23a and the main wall 22 from the back side of the inner panel 2. It is bent according to the rear side corner at 2A. In FIGS. 3 and 4, the spot-welded portions between the door latch reinforcement 11 and the inner panel 2 are schematically shown by black circles.

As shown in FIG. 3, the door latch reinforcement 11 (in other words, the door latch 1b and the striker S) is positioned upward in the vertical direction of the vehicle from the bent region W of the valley V where stress and load tend to concentrate. positioned.

[Installation structure of the rear end of the impact beam]
As described above, the rear end portion 10a of the impact beam 10 is fixed to the inner panel 2 (outer side surface 2b in the vehicle width direction) via the bracket 12 positioned below the door latch 1b. The bracket 12 is formed by subjecting a thin metal steel plate to press molding or the like. The bracket 12 is fixed (held) to the inner panel 2 by being spot-welded to the back surface of the inner panel 2 .

In this embodiment, the bracket 12 is fixed to the rear vertical wall 23a and the annular wall 21 (see FIG. 2). Specifically, the bracket 12 is formed below the door latch 1b and the door latch reinforcement 11 along the rear vertical wall 23a and the annular wall 21 from the back side of the inner panel 2. It is bent according to the corner where it intersects with the annular wall 21 . More specifically, the bracket 12 is connected to the annular wall 21 by spot welding to the retraction surface portion 24a of the panel peripheral edge portion 24 that is continuous with the annular wall 21 and forms a part of the annular wall 21. is joined to A portion of the bracket 12 that is joined to the annular wall 21 (retraction surface portion 24a) is formed with a curved portion that is curved in accordance with the cross-sectional shape of the impact beam 10, and the rear end portion 10a of the impact beam 10 extends from the bracket. It is fixed to the inner panel 2 via a bracket 12 by being welded to the curved portion 12 .

The bracket 12 (in other words, the rear end portion 10a of the impact beam 10) is positioned below the bending portion region W in the vehicle vertical direction, as shown in FIG. That is, the bent region W is positioned between the door latch reinforcement 11 and the bracket 12 in the vehicle vertical direction.

[Detailed structure of the door body]
The inner panel 2 of the door body 1 has the following elements (structure) in addition to the elements (21, 22, 23, 24, 25) described above.

The inner panel 2 has a plurality of beads B spaced apart from each other in the vertical direction of the vehicle in a portion of the rear vertical wall 23a between the door latch reinforcement 11 and the bracket 12 in the vertical direction of the vehicle. That is, in the present embodiment, the plurality of beads B are provided on the portion of the rear vertical wall 23a corresponding to the bent region W in the vehicle vertical direction. Although not particularly limited, four beads B are formed in the drawing.

The plurality of beads B extend in the wall height direction between the annular wall 21 and the main wall 22 in the portion between the door latch reinforcement 11 and the bracket 12 in the vertical direction of the vehicle on the rear vertical wall 23a. . Therefore, the wall height direction between the annular wall 21 and the main wall 22 in the rear vertical wall 23a, which is the direction in which each bead B extends, is generally the direction in which the rear end of the door body 1 pivots about the hinge 1a. (direction of movement).

In this embodiment, each bead B extends from the end of the rear vertical wall 23a on the side of the main wall 22 to just before the contact portion of the weatherstrip 26. As shown in FIG. That is, the bead B extends from the rear side corner portion (in other words, the mountain line portion where the rear vertical wall 23a and the main wall 22 intersect) of the main portion 2A of the inner panel 2 to the contact portion with the rear vertical wall 23a of the weatherstrip 26 ( contact range). Therefore, the bead B is formed in a trough V which is a corner where the annular wall 21 and the vertical wall 23 intersect (more specifically, a flexion region W which is a region corresponding to the flexion 23a1 of the rear vertical wall 23a of the trough V). ) to the upper end of the contact portion with the weatherstrip 26 of the rear vertical wall 23a.

In this embodiment, each bead B bulges forward in the vehicle front-rear direction at the bead-forming location of the rear vertical wall 23a, and is formed to be wider from the annular wall 21 side toward the main wall 22 side. . That is, each bead B is recessed toward the inside of the door body 1 on the side of the inner side surface 2a in the vehicle width direction of the inner panel 2 relative to the other portion of the rear vertical wall 23a (see FIGS. 1 and 3). 2 protrudes toward the inside of the door body 1 from the other portion of the rear vertical wall 23a. When viewed from the inside of the door body 1, each bead B has, for example, a generally trapezoidal cross section (mountain shape) protruding toward the inside of the door body 1. and a side wall portion of the The distance between the side wall portions on both sides in the bead width direction of each bead B increases from the annular wall 21 side toward the main wall 22 side. Although not particularly limited, the depth of each bead B is, for example, about 3 mm to 4 mm.

The portion of the rear vertical wall 23a to which the bracket 12 is joined is also formed to be slightly recessed toward the inside of the door body 1, like the bead B. As shown in FIG. Further, the portion of the rear vertical wall 23 a to which the door latch reinforcement 11 is joined is also formed to be slightly recessed toward the inside of the door body 1 . As a result, the strength of the portion of the rear vertical wall 23a to which the bracket 12 and the door latch reinforcement 11 are joined is improved.

In this embodiment, the door body 1 has the shock absorbing member 27 . The shock absorbing member 27 is a portion of the main wall 22 on the rear vertical wall 23a side (in other words, a rear corner portion side portion of the main portion 2A of the inner panel 2, or the rear vertical wall 23a and the main wall 22). is attached to a predetermined position between the door latch reinforcement 11 and the bracket 12 in the vertical direction of the vehicle in the portion on the side of the mountain where the two intersect. The shock absorbing member 27 is one of components for efficiently transmitting to the vehicle body the inertia energy of the side door 100 with the hinge 1a as a fulcrum generated when the side door 100 is closed. The shock absorbing member 27 is made of, for example, an elastic columnar member such as cushion rubber. The shock absorbing member 27 is attached to the main wall 22 and protrudes inward in the vehicle width direction (vehicle interior) from the main wall 22, and contacts the vehicle body to reduce the shock when the door is closed.

In this embodiment, the rear end portion 30a of the door outer center reinforcement 30 in the door body 1 in the vehicle longitudinal direction is positioned between the door latch reinforcement 11 and the bracket 12 in the vehicle vertical direction.

Next, the operation of the vehicle side door structure according to this embodiment will be described.

In the side door 100 to which the vehicle side door structure as described above is applied, (1) the wall height direction between the annular wall 21 and the main wall 22 in the rear vertical wall 23a, which is the direction in which each bead B extends, is It is generally oriented in the rotating direction (moving direction) of the rear end portion of the door body 1 with the hinge 1a as a fulcrum. Therefore, the plurality of beads B extend so as to effectively stretch against the load in the rotational direction about the hinge 1a, and the door body 1 is strong against the load in the rotational direction when the door is closed. It is structured. As a result, when the side door 100 is closed, the load on the rear end side of the outer panel 3 and the rear end of the impact beam 10 tend to move toward the interior of the vehicle in the rotational direction about the hinge 1a due to inertia. The rear vertical wall 23a having a plurality of beads B can effectively receive the load of the rear wall 23a. (2) Further, since the plurality of beads B are provided apart from each other in the vertical direction of the vehicle in the portion between the door latch reinforcement 11 and the bracket 12 in the vertical direction of the vehicle on the rear vertical wall 23a, A three-dimensional structure is constructed in the rear vertical wall 23a between the forcement 11 and the bracket 12 to improve the rigidity of the rear vertical wall 23a and distribute the input load and possible stress relatively uniformly. be done. As a result, the concentration of load and stress at the connection points (spot welding points and bolt fastening points) between the door latch reinforcement 11 and the inner panel 2 and the connection points (spot welding points) between the bracket 12 and the inner panel 2 are effective. effectively suppressed or prevented. As a result, the reliability of the holding performance of the door latch reinforcement and the holding performance of the bracket for fixing the impact beam is enhanced.

Note that the side door 100 according to the present embodiment in which the bead B is formed on the rear vertical wall 23a and the side door 100′ in which the bead B is not formed on the rear vertical wall 23a (hereinafter referred to as the side door according to the comparative example) 100'), an endurance test in which the door was repeatedly opened and closed was carried out. FIG. 6 is a conceptual diagram for explaining the spot-welded structure between the inner panel 2 and the door latch reinforcement 11 of the side door 100, and FIG. 2 is a conceptual diagram of spot weld delamination. FIG. 6 schematically shows an example of a spot-welded portion between the door latch reinforcement 11 and the inner panel 2 with a circle. Similarly, in FIG. 7, an example of a spot-welded portion is schematically shown by a circle.

As a result of the endurance test, the side door 100 according to the present embodiment showed that the plastic strain at the connection points (spot welding points and bolt fastening points) between the door latch reinforcement 11 and the inner panel 2 was lower than that of the side door according to the comparative example. In addition, it was confirmed that the plastic strain at the connecting portion (spot welded portion) between the bracket 12 and the inner panel 2 was also reduced as compared with the side door according to the comparative example. For example, after the endurance test, spot weld peeling did not occur as shown in FIG. The same applies to spot welds between the bracket 12 and the inner panel 2 . On the other hand, in the side door according to the comparative example, spot weld peeling sometimes occurred at the spot-welded portion between the door latch reinforcement 11 and the inner panel 2, as shown in FIG.

In this way, according to the side door 100 according to the present embodiment, the vehicle side door structure can improve the reliability of the holding performance of the door latch reinforcement 11 and the holding performance of the bracket 12 for fixing the impact beam. can be provided.

In addition, the side door 100 has such durability that cracks and peeling of the bracket 12 can be prevented from being spot-welded even when the door is repeatedly opened and closed. Therefore, since the bracket 12 is unlikely to be broken from the inner panel 2 in the event of a side collision, the impact energy upon collision with a pole or the like can be reliably absorbed by the bending deformation of the impact beam 10. It has a structure that is effective against collisions. Generally, once the design configuration of the vehicle body is determined, it is often difficult to move the impact beam 10, unlike other parts. However, in the side door 100, there is no need to change the position (layout) of the impact beam 10 itself in the structure for improving the reliability of the holding performance of the door latch reinforcement 11 and the bracket 12. It does not affect configuration. In addition, the structure improves the reliability of the holding performance only by changing the shape of the rear vertical wall 23a (arrangement of the beads B), and there is no need to add new parts, and the cost is low and the weight is not increased. Reliability can be improved.

In this embodiment, the plurality of beads B are provided in a portion of the rear vertical wall 23a corresponding to the bent region W in the vertical direction of the vehicle. As a result, when the door is opened and closed (especially when the door is closed) or during a side collision, etc., the rigidity of the bending portion region W, which can easily become a weak portion due to the concentration of stress and load in the valley V, is reduced by the plurality of beads B. increase.

In this embodiment, the door latch reinforcement 11 is fixed to the rear vertical wall 23 a and the main wall 22 , and the bracket 12 is fixed to the rear vertical wall 23 a and the annular wall 21 . That is, in the door latch reinforcement 11, the bead B reinforces the rear side corner of the main portion 2A of the inner panel 2 (in other words, the ridge portion where the rear vertical wall 23a and the main wall 22 intersect). On the other hand, the bracket 12 has a trough V, which is a corner where the annular wall 21 and the vertical wall 23 intersect (here, a flexed portion region corresponding to the flexed portion 23a1 of the rear vertical wall 23a of the trough V. W) is reinforced. Therefore, the side door 100 is configured such that the door latch reinforcement 11 and the bracket 12 are both joined to the rear vertical wall 23a and spaced apart from each other in the vertical direction, and are arranged between the two elements (11, 12) of the rear vertical wall 23a. portion is reinforced with a plurality of beads B. As a result, in the rear end portion of the door body 1, a highly rigid structure that is three-dimensionally interlocked from the annular wall 21 to the main wall 22 is constructed. As a result, the side door 100 according to the present embodiment can prevent bending deformation originating from the rear side corner portion (mountain portion) or the valley portion V of the main portion 2A, which may occur in a side collision or the like in the conventional structure. It is effectively suppressed and can effectively receive the impact energy in the event of a side impact.

In addition, since the rear vertical wall 23a on which a plurality of beads B are formed has joints (spot welding points and bolt fastening points) with the door latch reinforcement 11, spot welding between the door latch reinforcement 11 and the inner panel 2 is not possible. delamination is effectively avoided. As a result, the opening deformation of the L-shaped cross section of the door latch reinforcement 11 (see FIG. 7) that could occur in the conventional structure at the time of a side collision has the effect shown in FIG. 6 in the structure according to the present embodiment. effectively suppressed. Therefore, in the structure according to the present embodiment, it is possible to effectively prevent the door latch 1b from coming off and causing the door to open in the event of a side collision.

In this embodiment, since the bracket 12 is connected to the annular wall 21 and joined to the retraction surface portion 24a forming a part of the annular wall 21, the retraction surface portion 24a, which tends to shake when the door is opened and closed, can be effectively prevented from swinging. can be suppressed.

In this embodiment, the rear end portion 30a of the door outer center reinforcement 30 in the vehicle longitudinal direction is positioned between the door latch reinforcement 11 and the bracket 12 in the vehicle vertical direction. That is, the highly rigid rear vertical wall 23a formed with the plurality of beads B is positioned on the interior side of the rear end portion 30a of the door outer center reinforcement 30. As shown in FIG. As a result, when the door is closed, the load of the rear end portion 30a of the door outer center reinforcement 30 that tends to move toward the interior of the passenger compartment together with the outer panel 3 in the rotational direction about the hinge 1a due to inertia. can be effectively received by the rear vertical wall 23a. As a result, concentration of load and stress at joints (spot welded points and bolt fastening points) between the door latch reinforcement 11 and the inner panel 2 and at joints (spot welded points) between the bracket 12 and the inner panel 2 is effective. can be avoided.

In this embodiment, the shock absorbing member 27 is attached to a predetermined position between the door latch reinforcement 11 and the bracket 12 in the vertical direction of the vehicle on the rear vertical wall 23a side portion of the main wall 22 . As a result, even if a passenger or the like unintentionally closes the side door 100 with a strong force, the shock absorbing member 27 absorbs excess energy and reduces the stress and load at the above-mentioned joints and the like of the inner panel 2. concentration can be avoided more effectively.

In this embodiment, the bead B extends from the end of the rear vertical wall 23a on the side of the main wall 22 to just before the contact portion of the weatherstrip 26. As shown in FIG. As a result, deformation of the bent portion 23a1 of the rear vertical wall 23a and the bent portion 21a1 of the rear annular wall 21a is suppressed while maintaining the sealability between the weatherstrip 26 and the rear vertical wall 23a, and the weatherstrip 26 is positioned on the vehicle body side. As a result, the concentration of stress and load on the inner panel 2 side is more effectively suppressed.

In this embodiment, the bead B bulges forward in the vehicle front-rear direction at the bead-forming portion of the rear vertical wall 23a and is formed to be widened from the annular wall 21 side toward the main wall 22 side. Thereby, the rear vertical wall 23a having the bead B can be formed by press molding while effectively suppressing the occurrence of wrinkles.

The number (number) of beads B is not limited to four. For example, as the number of beads B, an appropriate number of 3 or more can be adopted. Also, the side door 100 is applied to the left front side door, but may be applied to the right front side door. In this case, a structure that is opposite to the left and right with respect to the vehicle width direction is applied to the structure described above. Also, the structure of the side door 100 may be applied to the structure of the rear side door.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and further modifications and changes are possible based on the technical idea of the present invention.

Reference Signs List 1 door body 1a hinge 1b door latch 2 inner panel 3 outer panel 10 impact beam 10a rear end 11 door latch reinforcement 12 bracket 21 annular wall 22 Main wall 23 Vertical wall 23a Rear vertical wall 26 Weatherstrip 27 Shock absorbing member 30 Door outer center reinforcement 30a Rear end B Bead

Claims (6)

A door body having an inner panel and an outer panel arranged outside the inner panel in the vehicle width direction, a hinge attached to a front portion of the door body in the vehicle front-rear direction, and the inner panel in the vehicle front-rear direction within the door body. A door latch fixed to the rear side via a door latch reinforcement, and a rear end fixed to the inner panel via a bracket extending in the vehicle front-rear direction within the door body and positioned below the door latch. A vehicle side door structure comprising: an impact beam having a portion;
The inner panel is
an annular wall facing inward in the vehicle width direction and with which the weatherstrip abuts;
a main wall facing inward in the vehicle width direction inside the annular wall and positioned inward in the vehicle width direction from the annular wall;
a vertical wall connecting the annular wall and the main wall;
provided apart from each other in the vertical direction of the vehicle in a portion between the door latch reinforcement and the bracket in the vertical direction of the vehicle on the rear vertical wall on the rear end side in the vehicle front-rear direction of the vertical walls, and the annular a plurality of beads extending in the wall height direction between a wall and said main wall;
A side door structure for a vehicle, characterized by comprising: The door latch reinforcement is fixed to the rear vertical wall and the main wall,
2. The vehicle side door structure according to claim 1, wherein said bracket is fixed to said rear vertical wall and said annular wall. a door outer center reinforcement extending in the vehicle front-rear direction above the impact beam in the door body and fixed to at least the vehicle width direction inner surface of the outer panel;
3. The vehicle side door according to claim 1, wherein a rear end portion of the door outer center reinforcement in the vehicle longitudinal direction is positioned between the door latch reinforcement and the bracket in the vehicle vertical direction. structure. 2. The door body includes an impact absorbing member attached to a predetermined position between the door latch reinforcement and the bracket in the vertical direction of the vehicle on the rear vertical wall side portion of the main wall. 4. The vehicle side door structure according to any one of 1 to 3. The vehicle side door structure according to any one of claims 1 to 4, wherein the bead extends from an end portion of the rear vertical wall on the side of the main wall to a portion in front of the contact portion of the weatherstrip. . 6. The bead according to any one of claims 1 to 5, wherein the bead bulges forward in the vehicle front-rear direction at a bead-forming portion of the rear vertical wall, and is widened from the annular wall side toward the main wall side. 1. The vehicle side door structure according to claim 1.

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