JPH071301Y2 - Backdoor lip structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a structure of a lip provided in a gap between a back door of an automobile and a rear end edge of a roof in order to reduce wind noise during traveling. Regarding

(Prior Art) Conventionally, as a lip structure for filling a concave portion formed on the outer surface of a vehicle body, for example, a structure described in Japanese Utility Model Laid-Open No. 62-82811 is known.

In this conventional structure, a molding having a lip is fitted on the upper end of the rear window glass, and the tip of the lip is in contact with the rear edge of the roof.

(Problems to be solved by the invention) By the way, when a back door is provided at the rear part of the vehicle body and the above-mentioned conventional structure is adopted and the lip tip portion is brought into contact with the rear edge of the roof, vibration of the vehicle body causes the lip to move. And the rear edge of the roof rub against each other, causing paint peeling at the rear edge of the roof.

In addition, the back door and the rear edge of the roof of the vehicle body often have a non-uniform spacing between the back door and the roof rear edge of the vehicle body due to problems in molding and the attachment of hinges and harnesses for the back door. Therefore, there is a problem in that the length of the lip needs to be changed correspondingly, and the lip does not have a single cross-sectional shape. Therefore, the molding must be performed by injection molding, which is disadvantageous in cost.

By the way, if the length of the lip is formed so that the distance between the rear end of the roof and the back door is wide, the contact area between the lip and the rear end of the roof becomes too large in the part where the distance is narrow, and the back door The operation force when opening and closing becomes large,
There is a problem that it becomes difficult to open and close, and the frictional force between the lip and the rear end portion of the roof increases, so that paint peeling easily occurs.

The present invention focuses on the above-mentioned conventional problems,
An object of the present invention is to provide a back lip structure capable of preventing paint peeling due to friction between the lip and the rear edge of the roof and capable of being molded by extrusion molding at low molding cost.

(Means for Solving the Problems) In order to achieve the above object, in the back door lip structure of the present invention, the back door is pivotably attached to the rear part of the vehicle body of the automobile so that the back door can be opened and closed. It is formed so as to be substantially horizontal along the roof top surface of the vehicle body when closed, and a gap is provided between the front edge of the upper portion of the back door and the rear edge of the roof, and the base portion is provided in the gap. Is provided with a lip attached to the front edge of the vehicle, and the lip has an extending portion extending toward the rear end edge side of the roof and a bending portion bent from the extending portion to the inside of the vehicle with an elastic material. When the vehicle travels at high speed, the bending portion of the lip expands due to the traveling negative pressure generated on the roof upper surface, and the lip contacts the rear edge of the roof to close the gap. The structure is formed so as to be separated from the edge.

(Operation) In the back door lip structure of the present invention, the tip of the lip and the rear edge of the roof are separated from each other and do not rub each other except during high-speed running where no wind noise is generated.

During high-speed running where wind noise is likely to occur, negative pressure on the running extends the bent portion of the lip and moves the lip tip to the outside of the vehicle.
The tip of the lip and the rear edge of the roof come into contact with each other to close the gap between the rear edge of the roof and the upper end of the back door. This prevents the generation of wind noise due to this gap.

In addition, even if the width of the gap between the upper edge of the back door and the rear edge of the roof is not constant due to reasons such as modeling and the wiring of the harness or hinges on the back door, Since the edge is separated, the change in the width of the gap can be absorbed by changing the distance between the lip tip and the roof rear edge.

Therefore, the lip can have a single cross-sectional shape, whereby extrusion molding can be adopted to reduce the cost.

Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.

First, the configuration of the embodiment will be described.

FIG. 1 is a sectional view showing a lip structure of a back door according to an embodiment of the present invention (I-I sectional view of FIG. 2), and FIG. 2 is a plan view showing an automobile having the back door lip structure of the embodiment. It is a figure.

Reference numeral 1 denotes a back door, which is pivotably attached to a door opening 21 formed at a rear portion of an automobile body 2 by a hinge 6 so as to be opened and closed, and a rear window glass 12 is provided on an upper surface of a door panel 11.
Are fixed by an adhesive material 13. In addition, 61 is a spindle, 6
2,63 are hinge brackets. The upper portion of the back door 1 is arranged so as to overlap the drip portion 24 which is formed in a concave shape and is continuous with the roof rear edge 23 of the roof 22 of the vehicle body 2. Edge and roof rear edge 23
A gap 3 is formed between Incidentally, 14 is the upper part of the back door, and 15 is the entire edge of the upper part.

A molding 4 is fitted around the periphery of the rear window glass 12, and a roof rear edge 23 is formed on the upper side of the molding 4.
The lip 5 is provided with an extending portion 53 that extends toward.

The lip 5 is an extruded product made of resin (PVC, vinyl chloride, etc.), and a bent portion 51 is formed in the middle thereof, whereby the lip tip 52 is separated from the roof rear edge 23. Is formed on the drip portion 24 side, and a gap 30 is formed between the lip front end portion 52 and the roof rear end edge 23.

Also, this lip 5 is, as shown in the imaginary line in FIG.
When the bent portion 51 is extended, the gap 30 is closed and the lip tip portion 52 is formed to have a length that abuts the roof rear end edge 23. Furthermore, due to the traveling negative pressure at a predetermined high speed traveling, Thus, the bent portion 51 is formed to be elastic.

The predetermined high speed is the speed at which wind noise is generated by the gap 30.

Next, the operation of the embodiment will be described.

(B) During manufacturing As described above, there is a gap between the lip 5 and the roof rear edge 23.
Because 30 is provided, for reasons of modeling and for installing a harness or providing a hinge on the back door,
Even if the width of the gap 3 between the upper end of the back door 1 and the roof rear edge 23 is not constant, the lip tip 52 and the roof rear edge 23
Since 23 is separated, the change in the width of the gap 3 can be absorbed by changing the width of the gap 30 between the lip tip 52 and the roof rear edge 23.

Therefore, since there is no problem in forming the lip 5 into a single cross-sectional shape, the lip 5 can be formed by extrusion molding at low molding cost.

(B) When driving at low speeds, including when the vehicle is stopped
Is in a downward state in which a gap 30 is retained between the roof and the rear edge 23.

Therefore, since the lip 5 is not in contact with the rear edge 23 of the roof, the lip 5 does not slide on the rear edge 23 of the roof due to the vibration of the vehicle body 2 to prevent the paint from peeling off the rear edge 23 of the roof. it can.

Further, even when the back door 1 is opened and closed, the lip 5 is separated from the roof rear end edge 23, and therefore the friction between the lip 5 and the roof rear end edge 23 does not increase the opening / closing operation force. Absent.

(C) During high-speed traveling At a predetermined high-speed traveling, the outer surface portion of the roof 22 is in a traveling negative pressure state due to the air flow along the roof 22,
Due to the suction force generated by the traveling negative pressure, the lip tip portion 52 is sucked out and comes into contact with the roof rear end edge 23, and the gap 30 is closed.
For this reason, the pushing out of the wind during high-speed traveling can be suppressed, and the generation of wind noise can be prevented.

Although the embodiment of the present invention has been described in detail above with reference to the drawings, the specific configuration is not limited to this embodiment. For example, in the embodiment, the lip is provided on the windshield,
It may be provided on the door panel.

The material of the lip is not limited to that shown in the embodiment as long as it has a predetermined length and elasticity.

(Effect of the Invention) As described above, in the lip structure of the back door of the present invention, the lip front end and the roof rear edge are not always in contact with each other, but only at a high speed when the lip is required. Since they are brought into contact with each other, the effect of being able to prevent the paint from peeling off from the trailing edge of the roof can be obtained by greatly reducing the friction between the two.

Further, since the lip can be formed in a single cross-sectional shape, there is an effect that the cost can be reduced by adopting extrusion molding which has a low molding cost.

When the vehicle is stopped, the extended part of the lip reduces the gap between the roof and the back door to improve the appearance. Also, because the lip is separated from the roof, the operation force becomes heavy due to the friction between the lip and the roof. Never.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view (taken along the line I--I in FIG. 2) showing the back door lip structure of the embodiment of the present invention, and FIG. 2 is a plan view showing an automobile having the embodiment structure. 1 …… Back door 3 …… Gap 5 …… Lip 14 …… Upper back door 15 …… Upper front edge 23 …… Roof rear edge 51 …… Bend 52 …… Lip tip 53 …… Extended Department

Claims (1)

[Scope of utility model registration request] 1. A back door is pivotably attached to a rear portion of a vehicle body of an automobile so as to be openable and closable, and an upper portion of the back door is formed to be substantially horizontal along a roof upper surface of the vehicle body when the vehicle is closed. Is provided between the front edge of the roof and the rear edge of the roof, a lip having a base portion attached to the front edge of the back door is provided in the gap, and the lip extends toward the rear edge of the roof. The extending portion that is present and the bending portion that is bent from the extending portion to the inside of the vehicle are made of an elastic material, and the lip extends when the vehicle travels at high speed due to the traveling negative pressure generated on the roof upper surface. Then, the back door lip structure is formed so as to come into contact with the rear edge of the roof to close the gap and to be separated from the rear edge of the roof during low-speed traveling including stopping.