JP2001334828A - Structure for drainage of rear door for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To require specific consideration for dealing with so that water flowing down may not penetrate into a chamber when a rear door for an automobile is opened, particularly, in the case of split line between the rear door and a main body in the automobile being situated in transverse side. SOLUTION: A curved part is installed to the transverse side of the rear door 1 and a waterproof strip 21 is attached to its inside. Furthermore, a plurality of restricted grooves 23, 24 are constructed to form on the waterproof strip 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION When a back door of an automobile is opened upward, water droplets adhering to the back door may fall and enter a room. The invention belongs to the technical field relating to such water ingress.

[0002]

2. Description of the Related Art FIG. 1 and FIG. 2 show an embodiment of the present invention. First, the back door 1 is installed in the rear part of the vehicle body in a substantially upright state, and is attached to the rear end of the roof panel 2 via the hinge 3. Therefore, the back door 1 opens and closes centering on the upper part. FIG. 1 corresponds to a cross-sectional view (1)-(1) of FIG.
The outer panel 4 on the lateral side is curved forward at the position of reference numeral 5. And the inner panel 6 is the hemming part 7
And a flange welded portion 8 is integrated with the outer panel 4. The rear window glass 9 is fixed to the flange welded portion 8 with a frame-shaped weather strip rubber 10. The “curved portion” means a portion where the outer plate shape is bent from the portion denoted by reference numeral 5 to the hemming portion 7 or a portion near the bent portion.

[0003] The side panel 11 and the inner panel 12 are connected by an end panel 13, reference numeral 14 denotes a hemming portion, and reference numeral 15 denotes a flange welding portion. A seal rubber 16 is fixed to the flange welded portion 15, and a part of the inner panel 6 is pressed against the seal rubber 16 when the back door 1 is closed as shown in FIG. When the back door 1 is opened upward, the rear opening 17 is opened. Code 18
Is a front edge of the curved portion, and a predetermined interval 20 is provided between the front edge and the rear edge 19 of the side panel 11. Interval 2
When viewed from the side of the vehicle, 0 extends vertically near the rear of the side surface. That is, the dividing line between the back door and the stationary part of the vehicle body is arranged on the lateral side of the vehicle body.

[0004]

The structure as described above is
Although very common, when the back door is opened during rainfall, rainwater flows to the left and right of the back door and drops, and may enter the room due to the influence of the wind direction or the like. Normally, the back door has a shape in which the center portion is bulged rearward, so that when the back door is opened, water droplets flow left and right. Alternatively, when the vehicle is stopped on an inclined road surface, it flows to one side. When the back door is closed, water droplets are attached to the outer panel of the back door and the rear window glass, but when the back door is opened and the lower end thereof is higher than the hinge portion, the water droplet is low. It may flow to the side and be dammed by the weatherstrip rubber, and then flow left and right into the room. In addition, since the back door often has a groove-shaped design line formed in the vehicle width direction, a water collecting phenomenon similar to that of the above-described weather strip rubber occurs at this portion, and the phenomenon of flowing down to the left and right. Occurs. FIG. 2 shows a flowing water state when the back door is opened.

In order to prevent the above-mentioned flow of water, it is conceivable to attach a long dam member near the reference numeral 5 in FIGS. 1 and 2. However, in order to completely block the water and flow it forward. However, there is a problem that it is necessary to increase the dam member, which is not preferable in appearance, and that the wind noise is increased.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and a first aspect of the present invention is an automobile back door which opens and closes around an upper portion. The outer panel on the side of the door is curved forward, and the front edge of the curved portion is continuous with the side panel with a predetermined gap between the front panel and the rear edge of the side panel. In this case, a waterproof strip having a plurality of water control grooves is attached inside the curved portion.

Accordingly, the water that has flowed down first enters the first water control groove, that is, the first groove, and is flowed forward.
At this time, since the water has a property of stopping at the first groove due to its surface tension, the water does not overflow from the groove and flows forward along the groove. The water overflowing from the first gutter due to the large amount of water enters the next gutter, namely the second gutter. At this time, the lip overflows and flows into the second groove. In the transitional period of the inflow, the flow velocity is reduced and the lip flows along the second groove. In the second groove, since the flow rate of the water is also reduced, the function of damping the water is strongly performed if the amount of the water is small. In such a phenomenon in the second groove, the same effect of surface tension as in the first groove is achieved.

According to a second aspect of the present invention, in the first aspect, the waterproof strip has a length at least along a side of the rear window of the back door. When the back door is opened, the water damped by the rear window glass weatherstrip rubber flows to the left and right of the back door, so the location and length of the waterproof strip should be at least on the side of the rear window. It is set equal to or longer than the rear window height. By doing so, the water flowing down the side of the back door will
It is surely captured by the waterproof strip and exhibits the flow phenomenon as described above.

A third aspect of the present invention is characterized in that, in the first or second aspect, when the back door is closed, the waterproof strip enters inside the rear edge of the side panel. Since the space formed by the front edge of the curved portion and the rear edge of the side panel is sealed by the waterproof strip, the inside is not visible from the gap, which is advantageous in appearance, and is further advantageous in terms of sealing rubber. Since a heavy seal is provided, the sealing function can be enhanced. In addition, such an enclosure has an advantage that a whistling sound is not generated by the airflow during traveling.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. Since the gist of the present invention is that the waterproof strip is added to the above-described vehicle body structure, the above-described vehicle body structure is fully used as a background of the present invention.

Referring mainly to FIG. The rubber waterproof strip 21 has a substantially inverted F-shaped cross-sectional shape, and extends in a direction perpendicular to the paper surface of FIG. The lip 22 and the front edge 18 form the first water control groove 23, that is, the first groove 23. Further, the lip 22 and the lip 24 constitute the next water control groove 25, that is, the second groove 25. Reference numeral 26 denotes a waterproof strip.
Are adhered to the inside of the curved portion 5 at the locations indicated by. The length of the waterproof strip 21 is optimally set over both lateral lengths of the back door 1. However, in view of the flow of water, it is appropriate to set the length of the rear window at least a little longer than that. is there. This state is indicated by reference numeral L in FIG.

When the back door 1 is closed as shown in FIG. 1, the waterproof strip 21 is elastically deformed while being in contact with the rear edge 19 of the side panel, and adheres to the inside of the hemming portion 14. In this way, the gap 20 is sealed with a waterproof strip 21.

The operation of the above embodiment will be described. The water flowing down on the back door in the vehicle width direction first enters the first water control groove 23, that is, the first groove 23, and flows forward. At this time, water has a property of trying to stop in the first groove 23 due to its surface tension, so that water does not overflow from the groove and flows forward along the groove. The water having a large amount of water and overflowing from the first groove 23 enters the next water control groove 25, that is, the second groove 25. At that time, the lip 22 overflows and flows into the second groove 25. In the transitional period of the inflow, the flow velocity is reduced and the second groove 25
Flowed along 5 In the second groove 25, the flow rate of the water is also reduced, so that the function of damping the water is strongly performed if the amount of the water is small.

Since the waterproof strip 21 has a length L at least along the side of the rear window of the back door 1, when the back door 1 is opened, the waterproof strip 21 is dammed by the weather strip rubber 10 of the rear window glass 9. Since water flows to the left and right of the back door 1, the installation location and the length of the waterproof strip 21 are set at least on the side of the rear window and equal to or longer than the height of the rear window. By doing so, the water that has flowed to the side of the back door 1 is reliably captured by the waterproof strip 21 and exhibits the above-described flow phenomenon.

Since the waterproof strip 21 enters the inside of the rear edge of the side panel 11 when the back door 1 is closed, the waterproof strip 21 is formed by the front edge 18 of the curved portion and the rear edge 19 of the side panel 11. The interval 20 is
Sealed by a waterproof strip 21. Therefore,
The inside is not seen from the gap 20, which is advantageous in appearance, and furthermore, a double seal with the seal rubber 16 is provided, so that the sealing function can be enhanced. In addition, such an enclosure has an advantage that a whistling sound is not generated by the airflow during traveling.

FIG. 4 shows a modification of the waterproof strip 21. Here, the shape of the lip is variously changed. (D) in the same figure is an example in which a third water control groove is installed, and is used when the amount of flowing water is extremely large.

[0017]

According to the present invention, the outer panel on the side of the back door is curved forward, and the front edge of the curved portion is spaced from the rear edge of the side panel by a predetermined gap. In the type connected to the side panel,
A waterproof strip having a plurality of water control grooves is attached inside the curved portion. Therefore, the water that has flowed down flows into the first water control groove, that is, the first groove, and flows forward. At this time, since the water has a property of stopping at the first groove due to its surface tension, the water does not overflow from the groove and flows forward along the groove. The water overflowing from the first gutter due to the large amount of water enters the next gutter, namely the second gutter. At this time, the lip overflows and flows into the second groove. In the transitional period of the inflow, the flow velocity is reduced and the lip flows along the second groove. In the second groove, since the flow rate of the water is also reduced, the function of damping the water is strongly performed if the amount of the water is small.

Due to the phenomenon described above, the water that has flowed down is not dripped but flows along the water control groove, and is guided to the left and right portions at the rear end of the roof panel. Therefore, it is possible to prevent water from dripping in the air and entering the room.

The waterproof strip has a length at least along the side of the rear window of the back door. When the back door is opened, the water blocked by the rear window glass weatherstrip rubber flows to the left and right of the back door, so the installation location and length of the waterproof strip are as follows:
At least, it is set on the side of the rear window and equal to or longer than the height of the rear window. By doing so, the water that has flowed to the side of the back door is reliably captured by the waterproof strip, exhibits the flow phenomenon described above, and performs a reliable waterproof function.

When the back door is closed, the waterproof strip enters inside the rear edge of the side panel. Since the space formed by the front edge of the curved portion and the rear edge of the side panel is sealed by the waterproof strip, the inside is not visible from the gap, which is advantageous in appearance, and is further advantageous in terms of sealing rubber. Since a heavy seal is provided, the sealing function can be enhanced. In addition, such an enclosure has an advantage that a whistling sound is not generated by the airflow during traveling.

[Brief description of the drawings]

FIG. 1 is a cross-sectional plan view showing an embodiment of the present invention, and corresponds to a cross-sectional view (1)-(1) of FIG.

FIG. 2 is a vertical sectional front view showing a state in which a back door is opened.

FIG. 3 is an enlarged longitudinal sectional front view of a main part of the present invention.

FIG. 4 is a cross-sectional view showing a modification of the waterproof strip.
There are four types (A) to (D).

FIG. 5 is a three-dimensional view showing a rear portion of a vehicle body to which the present invention is applied.

[Explanation of symbols]

 Reference Signs List 1 back door 4 outer panel 18 front edge of curved portion 11 side panel 19 rear edge of side panel 20 interval 23, 25 water control groove 21 waterproof strip 10 weather strip rubber 23 first groove 25 second groove

Claims (4)

[Claims] 1. A back door of an automobile that opens and closes around an upper portion, wherein an outer panel on a side of the door is curved forward, and a front edge of the curved portion is between the rear panel and a rear edge of the side panel. A vehicle back door, wherein a waterproof strip having a plurality of water control grooves is attached to the inside of the curved portion. Drainage structure. 2. The drainage structure for an automobile back door according to claim 1, wherein the waterproof strip has a length at least along a side of a rear window of the back door. 3. The drainage structure for an automobile back door according to claim 1, wherein the waterproof strip enters the inside of the rear edge of the side panel when the back door is closed. . 4. The waterproof groove according to claim 1, wherein the first groove of the waterproof strip has a function of allowing water to flow along the groove, and the second groove of the water-permeable strip. The drainage structure of an automobile back door, wherein the main function of the groove is to block water overflowing from the first groove.