JPH0434131Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an upper body structure of an automobile for preventing the rear surface (rear window) of the automobile body from becoming dirty due to adhesion of dust and the like when the automobile is running.

(Prior Art) Airflow flowing along the surface of a vehicle body when the vehicle is running tends to be drawn inward at the rear surface of the vehicle body. For this reason, dust contained in the airflow, dirt such as mud and powder thrown up by the wheels, or muddy water easily adheres to the rear surface of the vehicle and makes it dirty. This tendency is particularly noticeable in hatchback-type vehicles that do not have trunks in the rear.

A device designed to prevent the rear surface of the vehicle body from becoming dirty due to the entrainment of airflow is disclosed in Japanese Utility Model Publication No. 127180/1980. As shown in FIG. 5a, a rectifier plate g is provided at the lower rear end of the vehicle body 1 to suppress the airflow that tends to be drawn upward from the underside of the vehicle body 1. In connection with this, as shown in FIG. 5b, conventionally a rectifying plate g is disposed at the upper part of the rear end of the vehicle body 1, and this guides the airflow on the upper surface side of the vehicle body downward along the rear surface. It is disclosed as a technology.

(Problems to be Solved by the Invention) The present invention, like the prior art shown in FIG. In particular, it aims to solve the following problems.

In the conventional structure, the baffle plate g is provided in a state that protrudes from the outline of the vehicle body 1. For this reason, the rectifying plate g spoils the design of the vehicle body 1 and tends to impair its aesthetic appearance. Furthermore, since it is necessary to guide the airflow downward along the rear surface of the vehicle body, the baffle plate g increases the drag coefficient, which is unfavorable in terms of aerodynamic characteristics. Furthermore, in hatchback type automobiles, a current plate is provided near the upper edge of the back door, but the current plate tends to get in the way when the door is opened and closed, making it difficult to install it.

(Means for Solving the Problems) The above problem is caused by the fact that the current plate g is provided to protrude outside the outline of the vehicle body 1.
Therefore, in the present invention, the air flow guide device is housed within the outline of the vehicle body to prevent the rear surface (rear window) of the vehicle body from becoming dirty. Specifically, the upper end of the back door is pivoted to a roof stepped portion formed by lowering the rear end of the roof panel, and the top surface of the door frame forming the upper edge of the back door is smooth with the top surface of the roof panel. Targeted at a continuous automobile, the roof panel is recessed toward the rear end thereof in a downwardly sloping shape toward the rear of the vehicle body within an area narrower than the left-right width of the roof panel and facing the roof step. An air flow introduction section is formed. The door frame has an inlet that is formed to penetrate the inside of the door frame in the front and rear directions and opens opposite to the rear end of the air flow introduction part, and is provided in a vertical wall at the rear of the door frame opposite to the upper part of the rear window. An air passage is provided which is made of a rubber duct and has an outlet that opens, and which guides the air flow taken in from the air flow introducing portion toward the rear window. The entrance of the air passage opens downwardly in front so as to intersect with the air flow introduction part at an angle, and the front part of the duct has an opening that contacts the bottom surface of the roof step. The roof step part forms a drain passage for draining rainwater, etc. that has passed through the air flow introduction part to the outside of the vehicle in front of the air passage, and directs only the air flow to the air passage. It is assumed that the guide lip guiding the entrance is integrally formed.

(Function) As a result, in the present invention, the air flow introduced from the air flow introduction part as the car runs is guided downward toward the rear window by the air passage, so that dust etc. It is possible to prevent stains by preventing the adhesion of dirt. At that time, the airflow introduced from the airflow introduction part changes its direction in front of the guide lip.
Rainwater, etc. introduced with this air flow is effectively separated in front of the guide lip and drained to the outside of the vehicle via the drain passage, while the air flow is smoothly guided into the air passage by the guide lip. It is possible to prevent rainwater, etc. from flowing out to the rear window side without significantly impeding air flow. Moreover, the air flow introduction part for taking in air is narrower than the left and right width of the roof panel and is recessed from the outer contour of the car body, and an air passage that is continuous with this is formed inside the door frame. Therefore, the air flow guide device does not protrude outside the vehicle body, and the adverse effects caused by the air flow guide device protruding outside the outline of the vehicle body can be eliminated at once.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

1 to 4 show an embodiment in which the present invention is applied to a hatchback type automobile. In FIG. 2, the rear surface of the vehicle body 1 is constructed so that it can be opened and closed by a back door 2 that swings up and down. The back door 2 is composed of a door frame 3 forming a part of the outer wall W of the vehicle body, a rear window 4 supported by the door frame 3, a weather strip 5, and the like. 6 is a rear wheel, and 7 is a rear bumper.

In order to prevent dust from adhering to the rear surface of the vehicle body 1, particularly the rear window 4, an air flow guide device G is provided at the upper rear end of the vehicle body 1. This air flow guide device G includes an air flow introduction part 10 for taking in air flowing along the roof panel 9 during driving, and an air passage 11 for guiding the taken air flow downward toward the rear window 4. We are prepared. The air flow introducing portion 10 is formed by recessing a portion near the rear edge of the roof panel 9 in a downwardly sloping manner toward the rear of the vehicle body, and the rear end is formed by lowering the rear end of the roof panel 9. The upper end faces the roof step 12 on which the roof is pivoted. In order to prevent the appearance from being impaired, the air flow introducing portion 10 is formed only near the central portion of the roof panel 9 in the vehicle width direction, as shown in FIG.

As shown in FIG. 3, an air passage 11 is provided so as to penetrate back and forth in a space formed by a door outer panel 3a and a door inner panel 3b that constitute the door frame 3. This air passage 11 is defined by a rubber duct 13 shown in FIG.
They are provided at three locations along the rear edge of the 0 in the vehicle width direction.
The duct 13 is formed in the shape of a flat rectangular tube, and has an inlet 14 that opens opposite to the roof step 12 (the rear end of the air flow introducing section 10), and also has an inlet 14 that opens on the vertical wall of the third step of the door frame. It has an outlet 15 opening opposite to the upper part of the rear window 4. A thick-walled portion is formed on each peripheral edge of the inlet 14 and outlet 15 of the duct 13, and a set groove 1 for mounting and fixing is formed in this thick-walled portion.
6 is formed in a circular shape. Further, a guide lip 17 for guiding airflow into the duct is formed on the lower edge of the inlet 14 so as to hang diagonally downward and come into contact with the bottom surface of the roof step 12. The guide clip 17 and the roof step 12 form a drain passage 20 for draining rainwater etc. that have passed through the air flow introduction part 10 to the outside of the vehicle in front of the air passage 11. , it also serves as a tension piece when assembling the duct 13 to the door frame 3, allowing for quick assembly work. Furthermore, when the duct 13 is assembled into the door frame 3, the inlet 14 thereof is tilted forward and downward relative to the roof step 12, and is angularly intersecting the air flow introducing portion 10. , only the airflow from which rainwater, etc. has been separated in front of the guide lip 17 flows through the guide lip 17.
The duct 1 is scooped up smoothly and efficiently.
It is designed so that it can be introduced into 3. In addition, the outlet 15 located at the upper part of the weather strip 5 opens obliquely downward, and together with the fact that the air flow is directed downward in the air passage 11 in the duct 13, the air flow is ensured. The air is blown out toward the rear window 4. In Figure 3, code 1
9 is a weather strip for the back door 2.

Next, to explain the operation of the above embodiment, when the automobile is running, the airflow flows along the outline of the vehicle body 1. The airflow along the roof panel 9 is guided by the airflow introduction part 10 and flows into the roof step part 12. By changing the direction of the flow before the guide clip 17, rainwater and the like are separated and only the air flow is smoothly guided by the guide clip 17 to the air passage 11 in the duct 13. At this time, since the upper part of the entrance 14 of the duct 13 is covered by the front edge of the door frame 3 that extends forward, most of the air flowing into the roof step 12 flows into the three air passages 11. Transition. While passing through the air passage 11 the air flow is directed downwards and the duct 1
It blows out towards the rear window 4 from the exit 15 of 3. Then, as shown in FIG. 2, it flows diagonally downward along the surface of the rear window 4 while spreading in the vehicle width direction. At this time, the airflow drawn in from the underside of the vehicle body 1 attempts to flow toward the rear window 4, but it is pushed back by the airflow that has flowed down along the rear window 4 and is reversed. It flows towards the rear of the vehicle. In this way, the rear window 4 is constantly exposed to the airflow taken in by the airflow guide device G, and is never brought into contact with the reversed airflow that is drawn in at the rear of the vehicle body. Therefore, rear wheel 6
The rear window 4 may be damaged due to dust kicked up by
It is possible to eliminate contamination. On the other hand, since rainwater etc. separated before the guide lip 17 is drained to the outside of the vehicle through the drain passage 20, it is possible to prevent rainwater etc. from flowing out through the air passage 11 to the rear window 4 side.

(Effects of the invention) As explained above, in this invention, the airflow guide device is installed at the upper rear end of the vehicle body, and the airflow is taken in from the airflow introduction part formed by recessing the roof panel. Since the air is guided and blown out toward the rear window through an air passage provided inside the door frame, it is possible to prevent the rear window from getting dirty and to prevent rainwater from flowing into the rear window. The flow guide device can be accommodated within the contour of the vehicle body. This eliminates the fact that the airflow guide device spoils the design of the car body and impairs its aesthetic appearance, and also improves aerodynamic characteristics by minimizing the increase in drag coefficient caused by the installation of the airflow guide device. can be done.

In addition, since the air flow guide device, especially the air passage, can be provided using a dead space within the door frame, the air flow guide device does not obstruct the opening and closing of the back door, and the air flow guide This is advantageous in that new construction or changes to the structure for installing the device can be minimized, and manufacturing costs can be reduced.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention, in which Figure 1 is a partially cutaway side view showing the rear part of an automobile body, Figure 2 is a perspective view of the same, and Figure 3 is an enlarged view of the main parts. The vertical side view and FIG. 4 are perspective views of the duct. FIGS. 5a and 5b are schematic side views of a conventional automobile. DESCRIPTION OF SYMBOLS 1... Vehicle body, 2... Back door, 3... Door frame, 4... Rear window, 9... Roof panel, 10... Air flow introduction part, 11... Air passage,
12... Roof step, 13... Duct, 14...
Entrance, 15...Exit, 17...Guide lip, 2
0...Drain passage.

Claims (1)

[Claims for Utility Model Registration] The upper end of the back door is pivoted to a roof stepped portion formed by lowering the rear end of the roof panel, and the upper surface of the door frame constituting the upper edge of the back door is the upper surface of the roof panel. In an automobile that is smoothly continuous with the roof panel, the rear end of the roof panel is recessed in a downwardly sloping manner toward the rear of the vehicle body within a range narrower than the left and right width of the roof panel and facing the roof step. The door frame has an inlet that is formed by penetrating the inside of the door frame in the front and rear directions and opens opposite to the rear end of the air flow introduction part. The door frame has an outlet opening in the vertical wall at the rear of the door frame facing the upper part of the rear window, and is composed of a rubber duct for guiding the air flow taken in from the air flow introduction part toward the rear window. An air passageway is provided, and the entrance of the air passageway is inclined forward and downward so as to intersect the airflow introduction part at an angle, and the front part of the duct has an opening. , hangs down so as to come into contact with the bottom surface of the upper roof step, and forms a drain passage with the roof step for draining rainwater, etc. that has passed through the air flow introduction part to the outside of the vehicle in front of the air passage. An upper vehicle body structure for an automobile, characterized in that a guide lip for guiding only the air flow to the entrance of the air passage is integrally formed with the upper body structure.