JPH08165832A - Back door checker fitting section structure - Google Patents

Abstract

PURPOSE: To prevent such a trouble that a checker fitting position is unreasonably deformed at the time of opening/closing actions of a back door by efficiently reinforcing the checker fitting section of the back door without sharply increasing the weight of an inner panel. CONSTITUTION: A reinforcement 22 forming a closed cross section panel structure via the connection to at least an inner panel 20 or an outer panel 21 above the fitting position of a checker 3 is provided between the inner panel 20 and the outer panel 21 of a back door 2. The lower section 22d of the reinforcement 22 is overlapped on a checker reinforcing plate 4, and it is connected or fixed to the horizontal bottom section 20a of the inner panel 20 of the back door 2 or the other portion of the inner panel 20 connected to the horizontal bottom section 20a via the checker reinforcing plate 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a back door checker mounting portion structure, and more particularly to a structure in which a checker for keeping the back door open is attached to a side opening back door of an automobile.

[0002]

2. Description of the Related Art Conventionally, as an example of a back door checker mounting portion structure of this type, for example, the actual opening 63-4277.
Some of them are listed in No. 0 publication. As shown in, for example, FIGS. 6 and 7 of the present application, this conventional device supports one end of a checker 3 on the upper surface of a lower back 1a of an automobile body, and opens the other end of the checker 3 in a sideways opening back. This structure is attached to the horizontal bottom portion 20a formed by the inner panel 20 of the door 2e. A checker reinforcement plate 4e is appropriately overlapped on the horizontal bottom portion 20a to reinforce this portion.

According to such a structure, the back door 2e
When the door is opened, the back door 2e can be stopped at a predetermined opening by the positioning action of the checker 3, which is convenient. In addition, the horizontal bottom portion 20 of the back door 2e
Since the structure has the one end of the checker 3 directly attached to a, it is not necessary to separately provide a bracket for attaching the checker to the back door 2e when the checker 3 is attached, and the overall configuration can be simplified.

[0004]

However, in the above-mentioned conventional structure, the thickness of the horizontal bottom portion 20a of the inner panel 20 is thin, and the rigidity (or support strength) of the horizontal bottom portion 20a is not so large. Further, although the checker reinforcement plate 4e is superposed on the horizontal bottom portion 20a, the rigidity of the horizontal bottom portion 20a itself can be effectively increased only by partially overlapping the checker reinforcement plate 4e. I can't.

Therefore, conventionally, the tensile force F1 of the checker 3 generated when the back door 2e is opened acts on the horizontal bottom portion 20a of the inner panel 20.
There is a possibility that the horizontal bottom portion 20a may be bent and deformed.
In particular, such a bending deformation of the horizontal bottom portion 20a was more remarkable when the back door 2e was suddenly opened greatly. As a result, conventionally, such a horizontal bottom 20
Since the flexural deformation of “a” is repeated many times over a long period of time, the horizontal bottom portion 20a becomes fatigued and cracked.

As means for solving the above-mentioned difficulties,
It is possible to increase the rigidity of the horizontal bottom portion 20a by increasing the thickness of the inner panel 20. However, the adoption of such means causes a significant increase in the weight of the back door, which is not preferable as a back door for which weight reduction is desired.

The present invention has been devised under such circumstances, and it is possible to reinforce the checker mounting portion of the back door without causing a difficulty such as a significant increase in weight of the inner panel. The problem is to efficiently carry out the operation and appropriately eliminate the problem that the checker attachment portion is undesirably deformed when the back door is opened and closed.

[0008]

In order to solve the above problems, the present invention takes the following technical means.

That is, according to the present invention, the other end of the checker whose one end is supported by the automobile body has the other end on the horizontal bottom formed by the inner panel of the laterally opening back door.
A backdoor checker mounting portion structure mounted together with a checker reinforcement plate laid on the horizontal bottom portion, and at least between the inner panel and the outer panel of the backdoor above the mounting position of the checker. A reinforcement for forming a closed cross-section panel structure by joining with either the inner panel or the outer panel is provided, and the lower portion of the reinforcement is superposed on the checker reinforcement plate to enhance the checker reinforcement. It is characterized in that it is joined or fixed to the horizontal bottom portion of the inner panel of the back door or another portion of the inner panel connected to the horizontal bottom portion through a plate.

[0010]

In the back door checker mounting portion structure according to the present invention, the lower portion of the reinforcement additionally provided to the back door is superposed on the checker reinforcement plate, and the checker reinforcement plate is attached. The lower part of these reinforcements, the reinforcement plate for the checker, and the inner panel are joined to or fixed to the horizontal bottom part of the inner panel of the back door or other parts of the inner panel connected to this horizontal bottom via the By being integrated, the rigidity of the horizontal bottom portion of the inner panel to which the checker is attached increases. In particular, the reinforcement has a closed cross-section panel structure by being joined to either the inner panel or the outer panel of the back door, and since the rigidity thereof is increased, the rigidity of the horizontal bottom portion of the inner panel is ensured and It can be efficiently increased.

Therefore, even if a large pulling force from the checker acts on the horizontal bottom portion of the inner panel when the back door is suddenly and greatly opened, the horizontal bottom portion of the inner panel may be easily bent and deformed. Therefore, it is possible to appropriately prevent the inner panel from being damaged due to repeated bending and deformation.

In the present invention, it is not necessary to increase the wall thickness of the inner panel, and the reinforcement may have a small size such that a closed cross-section structure is formed above the checker mounting position. Since it is not necessary to provide the entire area of the back door, there is no problem that the weight of the entire back door is significantly increased. Further, since the reinforcement is provided between both the inner panel and the outer panel of the back door, there is no fear of impairing the appearance of the back door.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention will be described below.
A specific description will be given with reference to the drawings.

FIG. 1 is a perspective view showing an example of a rear portion of an automobile to which a back door checker mounting portion structure according to the present invention is applied. FIG. 2 is a sectional view of the X1-X1 line of FIG.
FIG. 3 is a cross-sectional view taken along line X2-X2 of FIG.

In FIG. 1, the back door 2 is provided with a door hinge 12 at one of the left and right side edges 11a and 11b of the rear opening 10 of the vehicle body 1 at one of the side edges 11a (or 11b). The back door 2 can be opened sideways. The back door 2 is connected to the lower back 1 a of the automobile body 1 via a checker 3.

As the checker 3, it is possible to use various types of checkers known in the related art. For example, the checker 3 shown in FIG. 6 described as the conventional example of the present application can be used. That is, in the figure, the checker 3 is provided with a fulcrum pin 32 at one end of a frame-shaped checker arm 31 having a groove portion 30, and an engagement pin 33 is fitted into the groove portion 30 of the checker arm 31. It is a thing. In such a checker 3, the checker arm 31 is used when the back door 2 (2e) is opened and closed.
The engaging pin 33 does not move relative to the groove portion 30 of the above and does not hinder the opening / closing operation of the back door 2. And
When the back door 2 is fully opened, the engagement pin 33 is located at the end of the groove portion 30 of the checker arm 31 and engages with the checker arm 31, thereby preventing the back door 2 from further opening. The back door 2 is temporarily fixed.

In FIG. 2, the engagement pin 33 on one end side of the checker 3 is attached to the lower back 1a of the automobile body 1, and the fulcrum pin 32 on the other end side is a horizontal bottom portion of the inner panel 20 of the back door 2. It is attached to 20a. On the upper surface side of the horizontal bottom portion 20a, a metal checker reinforcement plate 4 is arranged in an overlapping manner. Horizontal bottom 20a of panel 20
Both of them are threadedly engaged with the nut 35 to tighten them.

The back door 2 has the horizontal bottom portion 20a.
The inner panel 20 and the outer panel 21 having the above-described structure are joined to each other, but the reinforcement 2 is provided between the inner panel 20 and the outer panel 21.
2 are provided. The upper end portion 22 a of the reinforcement 22 has an inner panel 20 and an outer panel 21.
It is sandwiched and fixed on the upper part of each. Further, as shown in FIG. 3, the left and right end portions 22b and 22c of the reinforcement 22 are joined to the inner panel 20. As a result, both the reinforcement 22 and the inner panel 20 are supported by the fulcrum pin 3 of the checker 3.
A panel structure with a closed cross section is provided above the mounting position of 2, and the reinforcement 22 is fixed and the rigidity is increased.

As shown in FIG. 2, the lower portion 22d of the reinforcement 22 is extended to the position of an inclined surface flange portion 20b continuous with the horizontal bottom portion 20a of the inner panel 20, and this flange portion 20b is also provided. Is stacked on the upper surface of the checker reinforcing plate 4 extending to the position. And these reinforcements that overlap each other 2
Both the lower portion 22d of 2 and the checker reinforcement plate 4 are welded to the inner panel 20 at the welding point B by spot welding B or the like.

In the structure of the back door checker mounting portion having the above structure, the fulcrum pin 32 of the checker 3 is attached to the back door 2.
Horizontal bottom 20a formed by the inner panel 20 of
Since the back door 2 is opened, the pulling force F by the checker 3 acts on the horizontal bottom portion 20a each time the back door 2 is opened wide. However, on the flange portion 20b of the inner panel 20 connected to the horizontal bottom portion 20a, the checker reinforcement plate 4 extended from the attachment point of the fulcrum pin 32.
One end of the reinforcement 22 and the lower part 2 of the reinforcement 22
2d are overlapped, and these are integrated into the inner panel 20.
Since the flange portion 20b is welded to the flange portion 20b, the rigidity of the flange portion 20b is increased, and the horizontal bottom portion 20a connected to the flange portion 20b is inevitably increased in rigidity.

In particular, the reinforcement 22
As described with reference to FIG. 3, above the attachment point of the fulcrum pin 32 of the checker 3, a closed cross-section panel structure is formed by joining with the inner panel 20, and the rigidity of the reinforcement 22 is also enhanced. The horizontal bottom portion 20 is formed by joining with the reinforcement 22.
The rigidity of a and the flange portion 20b surely increases.

Therefore, even when the tensile force F when the back door 2 is opened is large, the inner panel 2
The horizontal bottom portion 20a of 0 does not easily bend and deform. The inner panel 20 of the back door 2 is
Even if the opening / closing operation of the back door 2 is repeated many times, the back door 2 has sufficient strength to cope with this.

When reinforcing the inner panel 20 as described above, for example, it is not necessary to increase the thickness t of the inner panel 20 as compared with the conventional case. Further, the reinforcement 22 may be partially provided above the attachment position of the checker 3, and may have a relatively small size S as shown in FIG. 1, for example. Therefore, the weight of the back door hardly increases, and the back door 2 can be manufactured in a light weight.

In the present invention, the concrete joining structure of the inner panel 20 of the back door 2, the reinforcing plate 4 for the checker, and the reinforcement 22 is not limited to the above-mentioned embodiment.

For example, in the above embodiment, the lower portion 22d of the reinforcement 22 and the checker reinforcing plate 4 are used.
In order to simplify the welding work by simultaneously welding and at the same location B, instead of this, for example, the location where the reinforcing plate 4 for the checker is welded to the inner panel 20 of the back door 2 and the reinforcement 22. The lower portion 22d may be welded to the checker reinforcement plate 4 at a different position. Further, in the above embodiment, the flange portion 20 of the inner panel 20 is formed in an inclined shape, but the flange portion 20 is formed in a non-inclined vertical shape, and the checker is provided at the position of the vertical flange portion 20. The reinforcing plate 4 and the lower portion 22d of the reinforcement 22 may be joined to each other.

Further, according to the present invention, for example, as shown in FIG. 4, on the upper surface side of the horizontal bottom portion 20a of the inner panel 20, the checker reinforcement plate 4 and the reinforcement 2 are provided.
The two lower portions 22d may be overlapped with each other, and these three members may be joined by spot welding Ba (the first one described above).
The same parts as those in the example are designated by the same reference numerals. The same applies below).

As shown in FIG. 5, the checker reinforcement plate 4 is joined to the horizontal bottom portion 20a or the flange portion 20b of the inner panel 20 by welding Bb or the like, and then the upper surface side of the horizontal bottom portion 20a of the inner panel 20 is joined. In, the lower portion 22d of the reinforcement 22 may be overlapped with the checker reinforcement plate 4 and then tightened with the nut 35. In this case, the lower part 2 of the reinforcement 22
It is not necessary to weld 2d to the checker reinforcement plate 4.

As described above, in the present invention, the design of the concrete joining structure of the reinforcement 22 and the checker reinforcement plate 4 can be changed in various ways. In short, the lower part of the reinforcement is overlapped with the checker reinforcement plate, and the checker reinforcement plate is used to connect to the horizontal bottom of the inner panel of the back door or other parts of the inner panel connected to the horizontal bottom. It may be joined or fixed. Further, the reinforcement does not necessarily have to be formed into a closed cross-section panel structure by being joined to the inner panel 20 of the back door 2, but may be formed into a closed cross-section panel structure by being joined to the outer panel 21 of the back door 2. Good.

In addition, in the present invention, the design of the specific structure of each part such as the back door 2 and the checker 3 can be changed in various ways.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a configuration of a rear portion of an automobile to which a back door checker mounting portion structure according to the present invention is applied.

FIG. 2 is a cross-sectional view of the X1-X1 line of FIG.

3 is a cross-sectional view taken along line X2-X2 of FIG.

FIG. 4 is a sectional view of an essential part showing another example of the back door checker attachment part structure according to the present invention.

FIG. 5 is a cross-sectional view of essential parts showing another example of the back door checker mounting portion structure according to the present invention.

FIG. 6 is a cross-sectional perspective view of essential parts showing an example of a conventional back door checker attachment part structure.

FIG. 7 is a cross-sectional view taken along line X3-X3 of FIG.

[Explanation of symbols]

 1 Car Body 2 Back Door 3 Checker 4 Checker Reinforcing Plate 20 Inner Panel 20a Horizontal Bottom 20b Flange 21 Outer Panel 22 Reinforcement 22d Lower (Reinforcement)

Claims (1)

[Claims] 1. A checker, one end of which is supported by an automobile body, is attached at the other end thereof to a horizontal bottom formed by an inner panel of a side-opening back door, together with a checker reinforcement plate stacked on the horizontal bottom. The back door checker mounting portion structure is configured to be closed between both the inner panel and the outer panel of the back door by joining with at least one of the inner panel and the outer panel above the mounting position of the checker. A reinforcement forming a cross-sectional panel structure is provided, and a lower portion of the reinforcement is superposed on the checker reinforcement plate, and the horizontal bottom portion of the inner panel of the back door is inserted through the checker reinforcement plate. Or it is joined to other parts of the inner panel connected to this horizontal bottom. Or characterized in that it is fixed, a back door checker mounting portion structure.