JP2548441Y2 - Car back door reinforcement structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for reinforcing a back door of an automobile.

[0002]

2. Description of the Related Art A conventional backdoor reinforcing structure is disclosed in, for example, Japanese Utility Model Publication No. 1-222727.

According to this , a back door is opened at the rear surface of a vehicle body.
A mouth is formed, and a back opening is
The quad door is pivotally supported so as to be vertically rotatable. This battery
Kud A is substantially vertical position in rotation to the lower
Thus, the back door opening is closed.

[0004] In addition, the rotating end side of the back door is constituted.
The back door body includes an inner panel and an outer panel that face each other, and a concave portion for fitting a license plate is formed on an outer surface of the outer panel.

In the above configuration, generally,
The lower end, which is the rotating end of the back door body, is
A lock means is provided at the lower opening edge of the opening to enable locking.
Have been killed.

Then, the back door is pivoted upward to
Then, the back door opening is opened, and from this state,
The outer edge of the back door is the opening edge of the back door opening.
If it is turned down until it collides with, as described above,
The back door opening is closed. Ma
Also, rotate the back door downward like this to
When the opening is closed, this rotation
The lower end of the back door body with the inertia force
The locking means above the lower opening edge of the quad door opening
It is automatically locked.

By the way, as described above, the back door
Rotate downward to close the back door opening and simultaneously
The lock means
When the back door rotates as described above,
The back door body that constitutes the pivot end side of the
Faster speeds result in greater inertial forces.

For this reason, the back door rotates downward.
And its outer edge collides with the opening edge of the back door opening and
By closing this, the rotation is suddenly stopped
The back door body is impacted by the inertial force
Power is given.

[0009] and, this time, ease stress concentration Ri by the above-mentioned impact force is generated in each corner portion of the peripheral portion of the recess
Fried, this corner portion become the easy part to fatigue failure
I have. Therefore, by way of the above publication, correspond to left and right sides of the recess reinforcing plate is provided between the both panels, the reinforcing plate by connecting together the two panels, preventing the corruption FIG Have been.

[0010]

By the way, for example, the rear lower part of the back door main body is impacted by a rear-end collision of a subsequent car.
If under the force and this is to deform, the upper Kiho strong plate, yes reinforce the lower end of the rear hatch main body
Fried, the lower end of the rear hatch main body is relatively easily deformed let be Ruosore.

[0011] Then, when such deformation occurs, apart lower end of the rear hatch main body from the lower opening edge of the back door opening, and rock of the lower end of the rear hatch main body is released, the lock The state may not be maintained.

[0012]

[The purpose of the invention] This invention has been made to focus on the circumstances as described above, the upper and lower to the upper opening edge of the back door opening
In the pivotally supported back door, the corners of the recesses formed in the outer panel for fitting the license plate are reliably prevented from being damaged by fatigue, and the back door body is deformed by receiving an external impact. If you do
Simple structure that the lower portion of the back door is easily deformed
And effectively prevented by forming, and an object thereof is to allow the locked state of the lower end portion of the same rear hatch main body is maintained to the lower opening edge of the back door.

[0013]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is characterized in that a back is provided on a rear surface of a vehicle body.
Form a door opening, and on the upper opening edge of this back door opening
The back door is pivoted up and down freely,
The back door body that constitutes the rotating end
The inner panel and the outer panel
Bend the lower edge backwards and after this bent piece
Connect the edge to the lower edge of the outer panel, and
A recess for fitting the license plate on the outer surface of the
Open the bent piece under the recess and open the back door.
A lock is provided at the lower opening edge of the mouth to enable locking.
Between the two panels corresponding to the left and right sides of the recess
Reinforcement of the back door of a car with a reinforcing plate
In structure

Each of the reinforcing plates is vertically elongated.
At the same time, the cross-sectional shape of the side view is almost open to the front
The upper piece, the lower piece, and both these pieces
Consisting of halfway pieces to be connected, above each of the above reinforcing plates
Connect the front edge of the piece to the middle part of the inner panel
The lower piece is connected to the bent piece, and
The halfway piece is joined to the middle part in the vertical direction of the outer panel .

[0015]

[Operation] The operation of the above configuration is as follows.

The back door 4 is pivoted downward at a certain speed.
The back door 4 closes the back door opening 3 and stops.
When stopped, it was generated in the back door body 7 by the above rotation.
Due to the inertial force, a large impact force is applied to the back door body 7.
Is provided, whereby the back door body 7
At the corners of the recess 15 formed in the
Tends to cause stress concentration and cause fatigue failure.

However, each side portion 15a, 1
5a is an upper piece 24a and a lower part of each reinforcing plate 24.
At least up and down on the inner panel 9 side by the piece 24b
It is supported at two points, and the corners of the recess 15 are reinforced.
ing.

Therefore, the rotation of the back door 4 is repeated.
That is, even if the opening and closing operations are repeated, the recess 15
That the corners of the
Is prevented.

The inner panel of the back door body 7
In case of providing the locking means 18 to be lockable in the lower opening edge 3b of the back door opening 3 the bent pieces 9a of the lower edge of Le 9, the lower piece 24 of each reinforcing plate 24
b is connected to the bent piece 9a,
When the door 4 receives an impact force, the impact force
The bent piece 9a is reliably prevented from trying to deform.
Thus, the locked state by the locking means 18 was kept good.
It is.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 2 and 3, reference numeral 1 denotes a van type automobile, and a back door opening 3
Are formed. A back door 4 is pivotally supported on the upper opening edge 3a of the back door opening 3 by a pivot 5 so that the back door opening 3 can be opened and closed by the rotation of the back door 4. .

[0022] In all the drawings, the back door 4, this
The back door 4 includes a back door main body 7, which constitutes a lower portion on the rotating end side, and a window 8 provided continuously on the upper portion of the back door main body 7. The back door body 7
Has an inner panel 9 made of sheet metal and an outer panel 10 facing each other at a distance from each other, and a space 11 is formed between the panels 9 and 10.

The upper edges of the inner panel 9 and the outer panel 10 are connected to each other by spot welding 13. The lower edge of the inner panel 9 is bent substantially horizontally toward the rear, and the rear edge of the bent piece 9a and the lower edge of the outer panel 10 are spot-welded.
Are connected by Further, although not shown, the side edges of the inner panel 9 and the outer panel 10 are also spot welded to each other.

On the outer surface of the outer panel 10, a shallow recess 15 is formed in the middle part on the left and right sides, and a license plate 16 is fitted and mounted in the recess 15.

Reference numeral 18 denotes locking means. The locking means 18 includes a locking claw 19 pivotally supported by the bent piece 9a below the recess 15 and a striker protruding from the lower opening edge 3b of the back door opening 3. 20; a handle 21 pivotally supported by the outer panel 10 at a position above the recess 15;
An interlock bar 22 for interlocking the lock claw 19 with the handle 21 is provided.

When the back door 4 is rotated downward and the back door opening 3 is closed, the locking claw 19 is automatically engaged with the striker 20, and the back door 4 is moved to the lower opening edge of the back door opening 3. 3b. When the handle 21 is operated in this state, the lock claw 19 is interlocked with the handle 21 via the interlock bar 22, and the lock claw 19 is detached from the striker 20 so that the back door 4 can be opened. ing.

Left and right sides 15a, 15a of the recess 15
The reinforcing plate 24, 2 made of sheet metal is
4 are provided, and each of these reinforcing plates 24 is vertically long and has a side surface.
Sectional shape is <br/> is the shape of substantially C which opens toward the front of the view. The upper end of each reinforcing plate 24 Waso is bent forwardly, which is the upper piece 24a, the upper
Front edge of the piece 24a has been sintered <br/> case by spot welding 25 to the middle portion in the vertical direction of the inner panel 9 at the top near the recess 15.

[0028] In addition, same as above the lower end of each of the reinforcing plate 24 Waso
Is bent forward to form a lower piece 24b.
Piece 24b is made me binding by spot welding 26 to the bent piece 9a.

Further, the upper piece 24a and the lower piece 24b
Application portion 24c in the same as above the reinforcing plate 24 which connects the extends along the outer panel 10 is joined to the pressure contact shape supra outer panel 10 via mastic 27.
The mastic 27 is an elastic body and has a vibration damping function.
For this reason, the tensile rigidity of the outer panel 10 is improved.

In the above case, each side 15a, 1 of the recess 15
5a is an upper piece 24a of the reinforcing plate 24 and a lower piece.
Is supported by at least two vertical points on the inner panel 9 side by the 24b, thereby, peripheral edge of the recess 15
Each corner in the portion is reinforced, so that when the back door 4 repeats the opening and closing operation,
Fatigue damage at each corner is reliably prevented.

As described above, each part 2 of each reinforcing plate 24 provided between the inner panel 9 and the outer panel 10 corresponding to each side part 15a of the recess 15 is provided.
4a, 24b and 24c are the inner panels 9 as described above.
The back door 4 receives an impact force due to, for example, a collision from behind, and the impact force is applied to the inner panel 9 corresponding to the locking means 18.
Even trying to deformation of the bent pieces 9a of the lower end support, the impact force by the respective reinforcing plates 24, the bent pieces 9a, and the upper inner panel 9 than the bent piece 9a, and the outer panel 10 Thus, the deformation is effectively prevented.

Therefore, the bent piece 9a corresponding to the locking means 18 is effectively prevented from separating from the lower opening edge 3b of the back door opening 3 due to the impact force. The locked state of the bent piece 9a with respect to the opening edge 3b is favorably maintained.

It should be noted, as shown by a chain line in FIG. 1, a part of the vertical intermediate portion 24c of the reinforcement plate 24 24c '
Is bent toward the inner panel 9 side,
c ′ may be spot-welded to the inner panel 9.

[0034]

[Effect of the Invention] According to the invention, the rear of the vehicle body
Form a door opening, and on the upper opening edge of this back door opening
The back door is pivoted up and down freely,
The back door body that constitutes the rotating end
The inner panel and the outer panel
Bend the lower edge backwards and after this bent piece
Connect the edge to the lower edge of the outer panel, and
A recess for fitting the license plate on the outer surface of the
Open the bent piece under the recess and open the back door.
A lock is provided at the lower opening edge of the mouth to enable locking.
Between the two panels corresponding to the left and right sides of the recess
Reinforcement of the back door of a car with a reinforcing plate
In structure

Each of the above reinforcing plates is vertically elongated.
At the same time, the cross-sectional shape of the side view is almost open to the front
The upper piece, the lower piece, and both these pieces
Consisting of halfway pieces to be connected, above each of the above reinforcing plates
Connect the front edge of the piece to the middle part of the inner panel
The lower piece is connected to the bent piece, and
Connect the middle piece to the middle part of the outer panel in the vertical direction.
Have been combined.

[0036] Thus, each side of the recess is supported at least two vertical points on the inner panel side by the upper piece and the lower piece of the reinforcing plate, each corner of the recess
There are reinforced, made a Rukoto.

[0037] Thus, the fatigue damage of each corner portion of the recess when the back door was repeated opening and closing operation is reliably prevented.

Further, the inner panel of the back door body
In the case where the provided locking means for lockable to the lower opening edge of the back door opening bent pieces of the lower edge, the lower piece of the respective reinforcing plate is bonded to the piece bent above
Therefore, when the back door is given an impact,
It is certain that the bent piece is going to deform due to the impact force of
It is really prevented.

Therefore, it is possible to effectively prevent the bent piece corresponding to the locking means from separating from the lower opening edge of the back door opening due to the impact force. The locked state of the piece is favorably maintained.

Moreover, the above-mentioned good lock state is maintained.
Is to prevent fatigue damage at the corner of the recess
It was achieved using the reinforcing plate provided.
Therefore, the above-mentioned holding of the locked state does not require a separate member.
This is achieved with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a sectional view taken along line 1-1 of FIG. 2;

FIG. 2 is a rear view of the automobile.

FIG. 3 is a side view of a rear portion of the vehicle.

FIG. 4 is a sectional view taken along line 4-4 of FIG. 1;

[Explanation of symbols]

Reference Signs List 1 automobile 2 body 3 back door opening 3b lower opening edge 4 back door 5 pivot 7 back door body 9 inner panel 9a bent piece 10 outer panel 15 recess 15a side 16 license plate 18 locking means 24 reinforcing plate 24a upper piece 24b Lower piece 24c halfway piece

Claims (1)

(57) [Scope of request for utility model registration] 1. A back door opening is formed in a rear surface of a vehicle body,
Turn the back door up and down around the upper opening edge of this back door opening.
It pivots freely and forms the pivot end side of this back door.
Form up of an inner panel and the outer panel facing the back and forth a back door body, bent toward the lower edge of the inner panel to the rear, the trailing edge of the bent piece attached to the lower edge of the outer panel, the outer panel A recess for fitting a license plate is formed on the outer surface, and locking means for locking the bent piece below the recess to the lower opening edge of the back door opening is provided. in to the back door reinforcement structure for an automobile provided with a respective reinforcement plate between said two panels, as well as the portrait of each reinforcing plate respectively, side
The cross-sectional shape of the view is almost U-shaped, opening forward.
The upper piece, the lower piece, and the two pieces
Constituted by Applications piece, the front edge of the upper piece of each of the reinforcing plates attached to the middle portion in the vertical direction of the inner panel, the lower
The piece combined binding to strip folded above and, back door reinforcing structure for an automobile in which the middle piece is joined to an intermediate portion of the vertical direction of the outer panel.