JPH09142150A - Door structure for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high strength without adding a reinforcement even when a panel area is wide, improve appearance quality, improve the strength of a door handle mounting portion without mounting a reinforcement, and improve assembly workability of a door lock. SOLUTION: A central recessed part 41 recessed in the direction of an outer panel 3 is formed in an inner panel 4 between a window inner peripheral joint 34b positioned at the lower end part of an opening part 1 for a window and an outer peripheral joint 34a positioned at the lower end part of a back door BD. An upper box section part 5a, an intermediate box section part 5b, and a lower box section part 5c, the cross sections of which are a closed cross section, are formed between joints 34b, 34c, 34d, and 34a, in such a way that two joints of central upper and lower joints 34c and 34d, brought into contact with each other for joining, are arranged in a vertically separating state between the bottom 41c of the central recessed part 41 and the outer panel 3.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a vehicle door structure.

[0002]

2. Description of the Related Art Conventionally, as a vehicle door structure, an outer panel and an inner panel are generally formed to have a closed cross-section structure. For example, in a large door such as a back door, the inner panel is used for working. Generally, a hole or a weight reducing hole is formed, and as a result of forming a large hole in the inner panel in this way, the area of the portion which is not a closed cross section becomes large and the strength of the door is reduced.

Therefore, as a structure in which the strength of the door in which such a hole is formed is enhanced, for example, Japanese Utility Model Laid-Open No. 55-102.
The structure described in Japanese Patent No. 648 (first conventional structure) and an actual Kaihei 3
The structure (second conventional structure) described in Japanese Patent Laid-Open No. 15272 is known. The first conventional structure is a structure in which the end portion of the inner panel located at the lower end of the work hole is brought into contact with the outer panel and fixed thereto. The second conventional structure is a structure in which a reinforcement is provided to connect the peripheral edge of the hole of the inner panel vertically and horizontally, and each rain hose is brought into contact with and fixed to the outer panel.

[0004]

However, in the above-described first conventional structure, the strength increases at the portion where the inner panel is brought into contact with the outer panel and its periphery due to the increase in the plate thickness, but the area of the closed cross section is increased. Since it does not increase, the contribution to increasing the strength of the entire door is small, and there is a problem that sufficient strength cannot be obtained with a door having a large panel area. Further, the second conventional structure also increases the strength to some extent, but since the area of the closed cross section hardly increases as in the first conventional technology, a door with a large panel area or a door with a small camber close to the vertical can be used. There was a demand for further strength enhancement.

The present invention has been made by paying attention to the above-mentioned conventional problems, and without adding a reinforcement,
The first purpose is to provide a door structure that can obtain high strength even if the panel area is large, and the second purpose is to improve the appearance quality. In addition, the strength of the door handle mounting portion is improved. The third purpose is to achieve the above-mentioned work without providing a reinforcement and to improve the workability of assembling the door lock.

[0006]

Means for Solving the Problems In order to achieve the above first object, the invention according to claim 1 is formed in an outer peripheral joint portion in which outer peripheral edges of an outer panel and an inner panel are joined to each other, and an upper portion of both panels. In a vehicle door structure provided with a window inner peripheral joint portion in which inner peripheral edges of the window opening are joined, a window inner peripheral joint portion located at a lower end portion of the window opening and a lower end portion of the door At least one panel of the inner panel and the outer panel between the outer peripheral joint portion located at, a recessed portion that is recessed in the direction of the other panel is formed, and between the bottom surface of this recessed portion and the other panel, both Are joined and joined to each other, an upper joining portion and a lower joining portion are vertically spaced apart from each other, and the upper joining portion and a window inner circumferential joining portion at a lower end portion of the window opening are joined together. Between the top and bottom A box cross section is formed, and an intermediate box cross section with a closed vertical cross section is formed between the upper joint and the lower joint, and the outer joint between the lower joint and the lower end of the door is formed. A lower box cross-section portion having a closed vertical cross section is formed between and.

In order to achieve the first object, in the invention according to claim 2, in the invention according to claim 1, the recess has a shape in which four circumferences of the bottom surface are surrounded by an upper wall, left and right side walls and a lower wall. And a side box cross section sandwiched between the left and right outer peripheral joints of the door and the left and right side walls in a lateral cross section.

In order to achieve the above second object, in the invention according to claim 3, in the invention according to claim 1 or 2, the outer panel includes the upper joint portion and the upper joint portion. An outer panel recessed portion that is recessed toward the inner panel is formed at a position above the inner panel side, and a finisher is fixed to the outer panel recessed portion.

In order to achieve the above-mentioned third object, in the invention according to claim 4, in the invention according to claims 1 to 3, a handle mounting hole is opened in the lower joint portion, and the lower box cross section. The outer handle for unlocking the door lock device provided inside the operating part is arranged outside the handle mounting hole, while the operating part is arranged inside the handle mounting hole. A structure in which a rod mounted in a state of being inserted into the door and transmitting an operating force from the operating portion to the door lock device is provided through a rod insertion hole opened in an inner panel of the lower box cross section. did.

[0010]

In the structure according to the first aspect, the outer panel and the inner panel are welded or bonded to each other at the outer peripheral joint portion, the window inner peripheral joint portion, the upper joint portion and the lower joint portion, or fixing means such as rivets and bolt nuts. Using the
As a result, a door is formed, and as a result, the upper box cross section, the intermediate box cross section and the lower box cross section whose vertical cross section is a closed cross section are formed in the lower portion of the window opening of the door.
High strength can be obtained by forming two box cross sections. Therefore, even if holes such as working holes and weight reducing holes are formed in the inner panel of each of these box portions, the required strength can be secured.

According to a second aspect of the present invention, in addition to the upper box cross section, the middle box cross section and the lower box cross section, which are arranged in three rows above and below, in the lower portion of the window opening of the door, a recess is formed. Since the side box cross section sandwiched between the left and right outer peripheral joints and the left and right side walls is formed on the left and right sides of the door, higher strength can be obtained.

In the structure according to the third aspect, after the outer panel and the inner panel are joined together, the finisher is fixed to the outer panel recess provided in the outer panel. Therefore, even if spot welding is performed at the upper joint portion, the welding marks appearing on the outer panel surface can be hidden by the finisher, and the work of concealing the welding marks is unnecessary.

In the structure according to claim 4, after the outer panel and the inner panel are joined, the door lock device is attached in the cross section of the lower box and the outer handle is inserted into the handle attaching hole, that is, the operating portion of the outer handle. To the outside of the handle mounting hole (outside of the outer panel vehicle)
On the other hand, the outer handle's operating part is installed inside the handle mounting hole (inside the inner panel of the vehicle), and then the rod is inserted into the door lock device from the inside of the vehicle. Connect the connected rod and the operating part of the outer handle.

In this way, the outer handle can be inserted into the handle mounting hole and supported by the lower joint where the outer panel and the inner panel are joined, so that it is expensive without adding a reinforcement or the like. Supporting rigidity is obtained. Further, the work of connecting the outer handle and the door lock device can be performed from the vehicle compartment side, which is the outer side of the inner panel, and the workability is excellent.

[0015]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a vertical cross-sectional view showing a vehicle door structure according to an embodiment of the present invention, in which the present invention is applied to a back door BD. This back door BD
Is attached to the rear end of the vehicle, the window opening 1 is provided in the upper half, and the window glass 2 is fitted therein.

The back door BD is formed by joining the outer panel 3 and the inner panel 4 by spot welding, and serves as a joint portion with an outer peripheral joint portion 34a provided along the outer peripheral edge of the back door BD. In addition to the window inner peripheral joint portion 34b provided along the inner peripheral edge of the window opening portion 1, a central upper joint portion 34c provided above and below the panel central portion below the window opening portion 1 and Lower central joint 34
It is joined at d. That is, the inner panel 4
As shown in FIG. 2, which is a perspective view of the upper panel 41, the inner panel 4 has four upper walls 41 at four positions below the window opening 1.
A central recess 41 having a wall surface of a, a side wall 41b, and a lower wall 41n and recessed in a substantially trapezoidal shape toward the outer panel 3 is formed. The central upper joint portion 34c is formed above and below a bottom surface 41c of the central recess 41. Joining flat surface 41d and the joining lower surface 41 forming the central lower joining portion 34d
e is formed. Further, the intermediate portion located between the bonding flat surfaces 41d and 41e on the bottom surface 41c is
A box forming portion 41f protruding in the vehicle compartment direction is formed, and work holes 41g, 41g are formed in the left and right portions of the box forming portion 41f.

Therefore, between the outer panel 3 and the inner panel 4, as shown in the vertical sectional view of FIG. 1, a closed vertical cross section is formed between the window inner peripheral joint portion 34b and the central upper joint portion 34c. The upper box cross section 5a is formed, and the middle box cross section 5b, which is a closed cross section in the vertical cross section, is formed between the central upper joint 34c and the central lower joint 34d, and the central lower joint is formed. A lower box cross section 5c having a closed cross section in a vertical cross section is formed between 34d and the outer peripheral joint 34a. Further, as shown in the transverse cross section of FIG. (Only shown), it is sandwiched between the outer peripheral joint 34a and the side wall 41b, and is completely closed in cross section at the positions of the central upper joint 34c and the central lower joint 34d (only the central upper joint 34c is shown). Cross section of right side box Cross section 5d and the left side box section portion (not shown) are formed.

As shown in FIG. 2, the inner panel 4 is formed with left and right recesses 41h, 41h projecting toward the outer panel 3 on the left and right of the central recess 41, and a working hole 41j is formed on the bottom surface thereof. Has been done. Further, the upper wall 41a is formed with a mounting hole 41k for mounting a motor of a wiper device (not shown).

On the other hand, the outer panel 3 is shown in FIGS.
As shown in FIG. 5, an upper recess 3a recessed toward the inner panel 4 is formed at a position above the central upper joint 34c, and a resin finisher 6 is fixed to the upper recess 3a by adhesion. Further, a lower recessed portion 3b recessed toward the inner panel 4 is formed in the central lower joint portion 34d of the outer panel 3 and a lower portion thereof.
Moreover, a handle mounting hole 34e is formed by penetrating the outer panel 3 and the inner panel 4 of the central lower joint portion 34d,
An outer handle 8 for unlocking the door lock device 7 of the back door BD is attached through the handle attachment hole 34e, and a cover 9 for covering the outer handle 8 is attached. In the outer handle 8, the operation portion 8a is arranged outside the handle mounting hole 34e, that is, outside the outer panel 3, and the operating portion 8b is inside the handle mounting hole 34e, that is, inside the vehicle compartment of the inner panel 4. The operating portion 8 is attached to the central lower joint portion 34d while being arranged inside.
b and the door lock device 7 are connected by a rod 10 provided through a rod insertion hole 41m opened in the inner panel 4 of the lower box cross section 5c. The portion of the inner panel 4 facing the vehicle compartment is covered with a garnish 11 as an inner lining.

With the door structure of the above-described embodiment, the following operational effects can be obtained. Back door B
Three boxes, an upper box cross section 5a, a middle box cross section 5b, and a lower box cross section 5c, whose vertical cross section is a closed cross section, are formed in a region where the panel area below the window opening 1 of D is wide. Since the cross-section portion is formed, it is possible to obtain an effect that high strength can be obtained without providing a reinforcement. Particularly, by forming the upper wall 41a, the side wall 41b, and the lower wall 41n which are vertical walls surrounding the four circumferences of the central recess 41, Therefore, high strength can be obtained in the vertical and horizontal directions. Therefore, the work hole 41 is formed in the inner panel 4 of each of the box portions 5a and 5b.
Even if g and 41g and the mounting hole 41k are formed, necessary strength can be secured.

Furthermore, in addition to the box cross-sections 5a, 5b, 5c arranged side by side in the vertical direction, a part of the cross section is sandwiched between the outer peripheral joint 43a and the left and right side walls 41b on the left and right of the central recess 41. Since the left and right side box cross-sections 5d having a completely closed cross section are formed, the effect of further improving the strength in the lateral direction can be obtained.

Further, spot welding marks appear on the surface of the outer panel 4, the central upper joint portion 34c and the central lower joint portion 3
Since 4d is hidden by the finisher 6 and the cover 9, there is an effect that a finishing treatment work for hiding welding marks is unnecessary.

Further, since the outer handle 8 is inserted into the handle mounting hole 34e and attached to the central lower joint 34d where the outer panel 3 and the inner panel 4 are joined, it is expensive without adding a reinforcement or the like. Supporting rigidity is obtained. In addition, the operating portion 8b of the outer handle 8
When connecting the door lock device 7 and the door lock device 7 by the rod 10, work can be performed with the operating portion 8b being arranged inside the inner panel 4, that is, the outer panel 3
Since the work can be performed outside the closed space between the inner panel 4 and the inner panel 4, the workability is excellent.

Since the garnish 11 is set on the inner side of the inner panel 4, there is no problem in appearance even if the rod 10 and the operating portion 8b of the outer handle 8 are located on the inner side of the inner panel 4. .

Although the embodiment has been described with reference to the drawings, the present invention is not limited to this embodiment. For example, in the embodiment, one concave portion of the inner panel is formed and Although the upper joint and the lower joint are provided on the upper and lower sides of the bottom surface, two concave portions are formed on the upper and lower sides to provide the upper joint portion on the upper concave portion, while the lower joint portion is formed on the bottom surface of the lower concave portion. May be provided. In addition, in the embodiment, the inner panel 4
Although the central recessed portion 41 which is recessed in the direction of the outer panel 3 is formed in the above, the recessed portions may be formed in both the outer panel 3 and the inner panel 4 and these bottom surfaces may be joined together, or only the outer panel 3 may be joined. A recess may be formed, and when the outer panel 3 is recessed, if the finisher 6 shown in the embodiment covers the recess, there is no problem in terms of appearance quality. In the figure,
Although the structure of the present invention is applied to the back door,
It can also be applied to other doors such as side doors.

[0026]

As described above, according to the first aspect of the invention, the outer panel and the inner panel are joined at the outer peripheral joint portion, the window inner peripheral joint portion, the upper joint portion, and the lower joint portion, and the door is joined. In the lower part of the window opening, the three box cross-sections, the upper box cross-section, the intermediate box cross-section and the lower box cross-section, whose vertical cross section is closed, are formed, so that no reinforcement is required. The effect that high strength can be obtained, and even if holes such as working holes and weight reducing holes are formed in the inner panel of each of these box parts, the necessary strength can be secured. Is obtained.

According to the second aspect of the present invention, in addition to the upper box cross section, the middle box cross section and the lower box cross section which are vertically arranged at the lower part of the window opening of the door, on the left and right of the recess, Since the side box cross section sandwiched between the left and right outer peripheral joints and the left and right side walls is formed,
The effect that high strength is obtained can be obtained.

According to the third aspect of the present invention, since the finisher is fixed to the outer panel recess and the upper joint is covered with the finisher, even if the upper joint is joined by spot welding, welding marks do not appear on the door surface. The effect that the finishing work for concealing the welding mark is unnecessary is obtained.

In the invention according to claim 4, since the outer handle can be inserted into the handle mounting hole and can be supported at the lower joint where the outer panel and the inner panel are joined, no reinforcement is added. Even if the outer handle and the door lock device are connected to each other from the vehicle interior side, which is the outer side of the inner panel, the workability is excellent. can get.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention.

FIG. 2 is a perspective view of an inner panel of the embodiment.

FIG. 3 is a transverse cross-sectional view of a main part of the embodiment.

[Explanation of symbols]

 BD back door 1 window opening 3 outer panel 4 inner panel 5a upper box cross section 5b middle box cross section 5c lower box cross section 5d right (left) side box cross section 6 finisher 7 door lock device 8 outer handle 8a operation Part 8b Working part 10 Rod 34a Outer peripheral joint 34b Window inner peripheral joint 34c Central upper joint 34d Central lower joint 34e Handle mounting hole 41 Central recess 41a Upper wall 41b Side wall 41c Bottom 41g Working hole 41j Working hole 41k Mounting hole 41m Rod insertion hole 41n Lower wall

Claims (4)

[Claims] 1. A vehicle provided with an outer peripheral joint portion in which outer peripheral edges of an outer panel and an inner panel are joined to each other, and a window inner peripheral joint portion in which inner peripheral edges of window openings formed in upper portions of both panels are joined to each other. In a door structure for a door, at least one panel of an inner panel and an outer panel between a window inner peripheral joint located at the lower end of the window opening and an outer peripheral joint located at the lower end of the door, the other Is formed in the direction of the panel, and between the bottom surface of this recess and the other panel, there are two joining parts, an upper joining part and a lower joining part, which are joined by abutting them. An upper box cross section having a closed vertical cross section is formed between the upper joint and the window inner peripheral joint at the lower end of the window opening. Section is closed between the lower section and the lower joint. The intermediate box cross section which becomes a surface is formed, and the lower box cross section whose vertical cross section is a closed cross section is formed between the lower joint and the outer peripheral joint of the door lower end. Vehicle door structure to be. 2. The recess is formed in such a shape that the four circumferences of the bottom surface are surrounded by an upper wall, left and right side walls, and a lower wall, and the left and right outer peripheral joints of the door in cross section and the left and right side walls on the left and right of the recess. The vehicle door structure according to claim 1, wherein a side box cross section sandwiched between and is formed. 3. The outer panel is formed with an outer panel recessed portion that is recessed toward the inner panel, at a position above the upper joint portion including the upper joint portion, and a finisher is fixed to the outer panel recess portion. The vehicle door structure according to claim 1 or 2, characterized in that: 4. A handle mounting hole is opened in the lower joint part, and an outer handle for unlocking a door lock device provided in the lower box cross section has an operating part located outside the handle mounting hole. The lower box is mounted on the lower box while the operating part is arranged inside the handle mounting hole and is inserted in the handle mounting hole. The vehicle door structure according to claim 1, wherein the vehicle door structure is provided so as to pass through a rod insertion hole formed in the inner panel of the cross section.