JP3302748B2 - Impact bar mounting structure of automobile door and method of mounting the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impact bar mounting structure for an automobile door in which an impact bar is mounted inside a door comprising an outer panel and an inner panel, and a mounting method thereof.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Utility Model Laid-Open Publication No. 57-168414.
As shown in the publication, an impact bar (guard bar) is installed along an outer panel constituting a door of an automobile, and a junction member (bracket) provided at an end portion thereof is provided with a step formed on an inner panel of the door. The impact bar which reinforces the door is installed inside the door by joining the door.

[0003] As shown in FIG. 4, a latch reinforcement 11 ′ for reinforcing the installation portion of the door latch 8 is installed on the rear wall of the front door 1. The latch reinforcement 11 ′ includes a rear plate 13 joined to the rear end face and the inner end face of the door latch 7.
′, An inner surface plate 14 ′, and a vertical surface portion 15 ′ protruding forward from an outer end of the rear surface plate 13 ′, and the vertical surface portion 15 ′ is provided at a rear end portion of the impact bar 6 ′. are joined by a means such as spot welding was junction member 9 ', the junction member 9', the impact bar
-It is configured to be joined and supported by the mounting portion 10 ' .

[0004]

As described above, when the vertical surface portion 15 'of the latch reinforcement 11' protruding from the front side of the door is joined to the junction member 9 ', It is necessary to increase the length of the junction member 9 'to some extent in order to provide the joint of the vertical surface 15'. Therefore, impact bar 6
'L between the rear end of the front door 1 and the length L
', It is inevitable that the total length of the impact bar 6' becomes smaller than the total length of the door.
There was a problem that the door could not be effectively reinforced by the impact bar 6 '.

Further , the vertical surface portion 15 'and the jaw
The impact bar mounting portion 10 of the impact member 9 ′
Due to insufficient bonding strength to the ´
The junction member 9 ′ is attached to the impact bar mounting portion 1.
There is a possibility that a situation such as departure from 0 'may occur.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is possible to prevent the overall length of an impact bar from being reduced and to secure a sufficient support rigidity of a latch reinforcement to prevent a collision of an automobile. Sometimes junction
An object of the present invention is to provide an impact bar attachment structure for an automobile door and a method of attaching the impact bar attachment member, which can prevent a material from being detached from an impact bar attachment portion .

[0007]

The invention according to claim 1 is
In an impact bar mounting structure of an automobile door in which an impact bar is mounted inside a door including an outer panel and an inner panel, an impact bar mounting portion and a door latch mounting portion are provided at a rear end of the door, and the impact bar the junction member is provided at a rear end portion, and a latch reinforcement for supporting the door latch, to form a vertical surface portion extending to the rear end side of the door, the
The vertical surface, the junction member, and the impact bar
And the attachment part is integrally joined to form a three-ply joint .

According to a second aspect of the present invention, there is provided an impact bar mounting method for an automobile door in which an impact bar is mounted inside a door including an outer panel and an inner panel, wherein the vertical bar projecting rearward from a latch reinforcement supporting a door latch. After the surface portion is provided and this vertical surface portion is joined to a junction member provided at the rear end portion of the impact bar, at least one of the junction member or the vertical surface portion is attached to an impact bar mounting portion formed at the rear end portion of the door. By joining , the vertical surface
Section, the junction member, and the impact bar
The parts are configured so as to form a three-ply joint .

[0009]

According to the first aspect of the present invention, the vertical surface of the latch reinforcement extending toward the rear end of the door is joined to and supported by the rear end of the junction member of the impact bar. The rear end of the junction member is directly or indirectly joined to the impact bar attachment portion of the door, so that the junction member and the vertical surface portion of the latch reinforcement are attached to the impact bar attachment portion. Become.

The vertical surface of the latch reinforcement, the junction member of the impact bar, and the impact bar mounting portion of the door are integrally joined to form a three-ply joint.

According to the second aspect of the present invention, the vertical surface portion of the latch reinforcement and the junction member of the impact bar, which are integrally joined in advance, are simultaneously joined to the impact bar mounting portion of the door.

[0012]

1 to 3 show an embodiment of an impact bar mounting structure for an automobile door according to the present invention. In this automobile, a front door 1 and a rear door 2 are provided with a center pillar 3.
They are installed facing each other with the. The front door 1 includes an outer panel 4 and an inner panel 5, inside which an impact bar 6 for reinforcement and a center pillar 3 are provided.
And a door latch 8 to be engaged with the striker 7 provided in the.

As shown in FIG. 3, the impact bar 6 is made of a round pipe material extending in the front-rear direction of the vehicle body, and a junction member 9 made of a plate material is attached to a rear end thereof. At the rear end of the front door 1, as shown in FIG. 1, an impact bar mounting portion 10 formed of a rear wall of the inner panel 5 is formed along the inner surface of the outer panel 4.

The door latch 8 is mounted on a latch installation portion 12 provided at the rear end of the front door 1 via a latch reinforcement 11. The latch reinforcement 11 includes a rear surface 13 facing the installation portion of the striker 7, an inner surface 14 extending from an inner end of the rear surface 13 to a front end of the front door 1, A vertical surface portion 15 extending from the outer end to the rear end of the front door 1 is provided.

The door latch 8 is attached to the rear surface 13 and the inner surface 14 of the latch reinforcement 11 by means such as a bottle stopper, and the rear surface 13 and the inner surface 1 of the latch reinforcement 11 are attached.
4 is configured to be joined to the latch installation portion 12 formed on the rear wall of the inner panel 5 by means such as spot welding. The vertical surface portion 15 of the latch reinforcement 11 is joined to the inner surface of the junction member 9, and the vertical surface portion 15 and the rear end 9 a of the junction member 9 are connected to the impact bar mounting portion of the front door 1. 10 are integrally joined by means such as spot welding.

In order to attach the impact bar 6 to the front door 1, first, as shown in FIG. 3, a junction member 9 is joined to the inner peripheral surface of the rear end of the impact bar 6, and then the rear end of the junction member 9 is joined. 9 a is joined to the outer surface of the vertical surface portion 15 of the latch reinforcement 11. Thereafter, the rear end 9a of the junction member 9
And the vertical surface 15 of the latch reinforcement 11
To the impact bar mounting portion 10 of the front door 1 by spot welding.

As described above, the latch reinforcement 11 supporting the door latch 8 is formed with the vertical surface 15 extending toward the rear end of the door, and the vertical surface 15 is joined to the rear end 9 a of the junction member 9. Because we configured
The length of the junction member 9 can be reduced as compared with the conventional structure in which a vertical surface protruding forward from the outer end of the latch reinforcement is joined to the junction member.

That is, the vertical surface portion 15 'of the latch reinforcement 11' projecting from the front side of the front door 1 as in the conventional structure shown in FIG.
When it is configured to be joined to the junction member 9 ′, the junction of the vertical surface 15 ′ and the junction with the front door 1 need to be provided separately on the junction member 9 ′. Therefore, the length of the junction member 9 'must be increased.

On the other hand, when the vertical surface 15 extending to the rear side of the front door 1 is formed in the latch reinforcement 11 as in the present invention, the vertical surface 15
Of the front door 1 and the impact bar mounting portion 1 of the front door 1
Since the junction with the zero can be provided on the junction member 9 so as to overlap, the length of the junction member 9 can be reduced as compared with the conventional structure.

Therefore, the distance L between the rear end of the impact bar 6 and the rear end of the front door 1 is reduced, and the total length of the impact bar 6 is set to a sufficient length corresponding to the front door 1. Can be. Therefore, the effect of effectively reinforcing the front door 1 by the impact bar 6 and the effect of joining the vertical surface portion 15 of the latch reinforcement 11 to the junction member 9 and maintaining the support rigidity are simultaneously achieved. can do.

Also, as described above, the junction member 9
After joining the vertical surface portion 15 of the latch reinforcement 11 to the rear end 9a of the front door 1,
In this case, both members are simultaneously joined to the impact bar attachment portion 10 by one joining operation. Therefore, the joining operation of the two members can be simplified as compared with a case where the two members are separately joined to the impact bar attachment portion 10.

In addition, a three-layered joint comprising the vertical surface portion 15 of the latch reinforcement 11, the rear end portion 9a of the junction member 9 and the impact bar attaching portion 10 is provided at the rear end portion of the front door 1. As a result, the vertical surface portion 15 and the junction member 9 can be firmly joined to the impact bar attachment portion 10, and the junction member 9 is detached from the attachment portion 10 at the time of a collision of an automobile. Can be effectively prevented from occurring.

In the above embodiment, the example in which the impact bar mounting structure according to the present invention is applied to the front door 1 has been described. However, the impact bar mounting structure and the mounting method thereof may be applied to the rear door 2. .

[0024]

As described above, according to the present invention, the latch reinforcement supporting the door latch is provided with the vertical surface extending to the rear end side of the door, and the vertical surface and the above-mentioned vertical surface are formed.
Make sure that the junction member and the impact bar
Because it was joined to the body and formed to form a three-ply joint , the vertical surface of the latch reinforcement
Therefore, the junction member is reinforced,
From the impact bar mounting part
To be separated or the junction member to be deformed.
There are effects such as effective prevention.

Further , the distance between the rear end of the impact bar and the rear end of the front door can be reduced by setting the length of the junction member short. Therefore, there is an effect that the front door is effectively reinforced by the impact bar .

After joining the vertical surface of the latch reinforcement to the rear end of the junction member,
When these are integrally joined to the impact bar attachment portion of the front door, the joining operation can be simplified as compared with a case where both members are separately joined to this attachment portion. .

[Brief description of the drawings]

FIG. 1 is a plan sectional view showing an embodiment of an impact bar mounting structure according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a perspective view showing a state where an impact bar and a junction member are joined.

FIG. 4 is a diagram corresponding to FIG. 1 showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Front door 4 Outer panel 5 Inner panel 6 Impact bar 8 Door latch 9 Junction member 10 Impact bar attachment part 11 Latch reinforcement 12 Latch installation part

Claims (2)

(57) [Claims] An impact bar mounting structure for an automobile door in which an impact bar is mounted inside a door comprising an outer panel and an inner panel, wherein an impact bar mounting portion and a door latch mounting portion are provided at a rear end of the door. A junction member is provided at the rear end of the impact bar, and a vertical surface extending to the rear end of the door is formed on a latch reinforcement supporting the door latch, and the vertical surface, the junction member,
The impact bar mounting part is integrally joined, and the three
An impact bar mounting structure for an automobile door, which forms a joint . 2. An impact bar mounting method for an automobile door in which an impact bar is mounted inside a door comprising an outer panel and an inner panel, wherein a latch reinforcement supporting a door latch is provided with a vertical surface portion projecting rearward. After joining the surface portion to the junction member provided at the rear end of the impact bar, by joining at least one of the junction member or the vertical surface portion to the impact bar attachment portion formed at the rear end of the door , Vertical surface and the above junction
The member and the impact bar mounting part are joined in three
A method for mounting an impact bar on an automobile door, wherein the impact bar is configured to form a part .