JP3449009B2 - Waterproof structure of automotive back door - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof structure for an automobile back door, and more particularly, to an automobile back door for a hatchback type automobile in which the back door opens upward. It relates to a waterproof structure. 2. Description of the Related Art FIGS. 6 and 7 show a back door 30 of a hatchback type automobile. This back door 30 is provided at a rear portion of a vehicle body of the automobile, and its upper portion is pivoted about its upper portion. It is configured to be opened upward. The above-described back door 30 is formed by joining a door outer panel 31 and a door inner panel 32 in a closed cross-sectional shape. A license plate opening 33 is provided in a substantially central portion of a lower portion thereof. Cutouts 34 and 35 corresponding to tail lights are provided on both sides. Further, a key cylinder 36 is provided at a side portion of the license plate opening 33 in a lower portion of the back door 30.
Is attached to the door outer panel 31 from the back side thereof with a sheet metal clip or the like (not shown) in a state of being penetrated into the key cylinder mounting hole 37 of the door outer panel 31. A back door trim 38 is attached to the inner surface of the back door 30 (see FIG. 6). [0003] In the case of an automobile having the key cylinder 36 on the door outer panel 31 as described above, the operation of attaching the key cylinder 36 to the door outer panel 31 is performed as shown in FIG.
As shown in FIG. 7, a large working hole 39 is formed in a portion of the door inner panel 32 corresponding to the key cylinder 36. Therefore, water that has entered the back door 30 through the gap between the key cylinder 36 and the key cylinder mounting hole 37 or the key hole of the key cylinder 36 easily flows into the vehicle interior through the work hole 39. Therefore, conventionally, as a waterproof structure for preventing water from flowing into the vehicle interior, a sealing cover 40 is attached to the inner surface of the door inner panel 32 as shown in FIGS. Sealing cover 4
0, the key cylinder 36 is attached to the key cylinder mounting hole 37 via the packing 41 as shown in FIG.
Actually, a flange 42 is provided on the periphery of the flange 9 as shown in FIG. [0005] However, the conventional waterproof structure of the back door as described above has the following problems. That is, when the working hole 39 is closed using the sealing cover 40, it is necessary to attach the sealing cover 40 to the door inner panel 32, and there is a problem that the attaching operation requires time and effort. When the waterproof packing 41 is used, the key cylinder 36 is attached to the door outer panel 31 from the side of the door inner panel 32 with a sheet metal clip or the like.
, The force for pressing down the packing 41 (packing tightening force) is weak, and there is a possibility that a sufficient waterproof function cannot be achieved. Moreover, the key cylinder 36
Since the key cylinder mounting hole 37 is not merely a circular shape due to the assembly restriction described above, water may enter the back door 30 through the key cylinder mounting hole 37. The work hole 39 of the door inner panel 32
Even if the flange 42 is provided on the peripheral portion of the back door 30, there is a risk that water that has entered the inside of the back door 30 may get over the flange 42 and enter the vehicle interior. The present invention has been made in view of such various problems, and an object of the present invention is to improve the assembling workability by omitting a waterproof member such as a sealing cover or a packing. It is another object of the present invention to provide a waterproof structure for a back door having such a structure that the waterproof property can be improved and the strength of the back door trim can be improved. In order to achieve the above-mentioned object, according to the present invention, a door outer panel and a door inner panel are joined in a closed sectional shape, and a key cylinder is provided on the outer panel. In a back door for a vehicle, which is mounted in a penetrating state and has a working hole for assembling a key cylinder at a position of the inner panel corresponding to the key cylinder, a back door trim mounted on an inner surface side of the door inner panel. A rib is formed and a waterproof frame material is provided, a frame-shaped portion is formed by the rib and the waterproof frame material, and the frame-shaped portion is brought into contact with the entire peripheral edge of the working hole. By doing so, the inner panel
A flange portion formed around the work hole, and the frame
And a part of the back door trim to form a water reservoir.
When the back door is in a substantially horizontal opened state,
And the door outer panel through a key cylinder mounting hole.
The water that has entered between the door and the inner panel
The water is prevented from leaking into the passenger compartment on the side of the back door trim by storing the water in the compartment. When water enters the inside of the back door through a key cylinder mounting hole or the like when the back door is rotated upward in a rainy weather to make the door substantially horizontal and open, the rib and the rib are connected to each other. Water is stored in a region surrounded by the waterproof frame material, and the outflow of water into the vehicle interior is prevented. In addition, in accordance with turning the back door downward in such a state to close the door substantially vertically, water retained in the area causes the space between the door outer panel and the door inner panel to move. The water passes through the drain hole at the bottom of the back door and is discharged to the outside of the back door (outside of the passenger compartment). Further, by providing the ribs on the back door trim, the strength of the back door trim as a whole is improved. BRIEF DESCRIPTION OF THE DRAWINGS FIG.
This will be described in detail with reference to FIG. FIG. 1 shows a hatchback type four-wheeled vehicle 1 provided with a waterproof structure according to the present invention. The four-wheeled vehicle 1 is disposed corresponding to an opening provided at a rear portion of the vehicle. A back door 2 is provided. The above-mentioned back door 2 is formed by joining a door outer panel 3 and a door inner panel 4 into a closed cross-sectional shape (see FIGS. 3 and 4). As shown by an arrow R, the door is turned upward and the door is opened. A key cylinder 6 is fixed in a key cylinder mounting hole 5 formed in a lower portion of the door outer panel 3 in a penetrating state as shown in FIG. The back door 2 is configured to be locked or unlocked in the closed state by being inserted and turned. On the other hand, as shown in FIG. 3, a working hole 7 for assembling a key cylinder is formed in the door inner panel 4 at a position facing the key cylinder 6, and a drainage portion is formed at a lower end thereof. A hole 8 is formed. Thus, when the back door 2 is disposed at the closed position as shown in FIG. 3, the door inner panel 4 is brought into contact with the weather strip 10 attached to the vehicle body 9 at the upper part of the drain hole 8. The drain hole 8 is arranged on the outside of the vehicle body. A back door trim 12 having a structure as shown in FIG. 2 is attached to the inner surface of the door inner panel 4. As shown in FIGS. 2 and 3, the back door trim 12 includes a board-shaped main body 13 formed into a predetermined shape, and an opposing surface 13 a which is one surface of the main body 13 and faces the door inner panel 4. And a waterproof frame member 15 made of urethane, which is attached to the facing surface 13a so as to correspond to the rib 14. More specifically, as shown in FIG. 2, the ribs 14 correspond to the upper half 16a (see FIG. 3) of the periphery of the working hole 7 of the door inner panel 4. The waterproof frame member 15 is formed in a U-shape so as to correspond to the lower half portion 16b (see FIG. 3) of the periphery of the working hole 7 of the door inner panel 4 while being formed in a U-shape. . The ribs 14 and the waterproof frame material 1
5 are joined to each other in an arrangement relationship opposite to each other, whereby a rectangular frame 17 is formed by the ribs 14 and the waterproof frame material 15. An enclosure region 18 is formed with a part of the main body 13. When the back door trim 12 is attached to the door inner panel 4, the rib 14 and the waterproof frame member 15 are connected to the upper half 16a and the lower half 16a of the periphery of the working hole 7 of the door inner panel 4. are abutting each half portion 16b, thus both the frame portion 17 is in contact over the entire circumference of the peripheral portion of the working hole 7, so that the enclosure area portion 18 is a position corresponding to the work hole 7 It has become. Hide
And formed around the working hole 7 of the door inner panel 4.
Flange 19, frame 17, backdoor trim 1
2 and a part of the main body 13 and a water reservoir (as shown in FIG. 4).
When the back door 2 is opened almost horizontally,
An enclosure region where the water 20 is stored) is formed. The back door 2 having such a structure has a sufficient waterproof function. That is, when the back door 2 is opened in a rainy weather or the like and the door is opened in a substantially horizontal state as shown in FIG. 4, a gap between the key cylinder mounting hole 5 and the key cylinder 6, a key hole, etc. The rainwater 20 enters the inside of the back door 2 through the back door trim 1, which is disposed immediately below the key cylinder 6.
2 enclosure region 18 (or this enclosure region 18
And falls into the above-mentioned water reservoir) . In addition, rainwater that climbs over the flange 19 formed around the work hole 7 of the door inner panel 4 also contains the rainwater 18 (or includes the rainwater 18).
In the above-mentioned water reservoir) . Thereafter, the back door 2 in the opened state is opened.
When a is rotated downward to place the substantially vertical closing state as shown in FIG. 5, with this, the enclosure area portion 18 (Moshiku
Indicates that the rainwater 20 stored in the above-mentioned water reservoir is enclosed by the surrounding area 18 (as shown by an arrow Q in FIG. 5).
Flows out of the above-mentioned water reservoir ) and is discharged to the outside of the back door 2 (outside the vehicle body) through the drain hole 8 at the lower portion of the back door 2. Therefore, according to the present embodiment, it is possible to prevent the rainwater 20 that has entered inside the back door 2, that is, between the door outer panel 3 and the door inner panel 4, from leaking into the vehicle interior. Therefore, the back door 2 can have a sufficient waterproof function. In addition, according to the waterproof structure of the back door 2 of the present embodiment, while having a sufficient waterproof function as described above, a waterproof member such as a sealing cover or a packing for a key cylinder which has been conventionally used is provided. Can be omitted, and the workability of assembling the waterproof structure can be improved and the cost can be reduced. Further, since the U-shaped rib 14 is integrally formed on the back door trim 12, the strength of the back door trim 12 and thus the strength of the back door 2 can be improved by the presence of the rib 14. The embodiment of the present invention has been described above.
The present invention is not limited to this embodiment, and various modifications and changes can be made based on the technical idea of the present invention. For example, the shapes of the ribs 14 and the waterproof frame member 15 are not limited to the U-shape, but correspond to the shape of the working hole 7 and come into contact with the entire periphery of the peripheral portion of the working hole 7. Any shape may be used as long as it has a shape. Also,
The positional relationship between the ribs 14 and the waterproof frame material 15 can be appropriately changed as needed. As described above, according to the present invention, the ribs and the waterproof frame material are disposed on the back door trim, and the frame formed by these components is formed on the periphery of the working hole of the door inner panel. By making contact over the entire circumference, the work of the inner panel
Flange formed around the hole, frame, and back
A part of the door trim constitutes a water reservoir, and the back door
The key cylinder mounting hole when
Between the door outer panel and the door inner panel
By storing the entered water in the water reservoir, the water is prevented from leaking into the vehicle interior on the side of the back door trim, so that a sealing cover and a packing for a key cylinder are used. Although it is possible to omit the waterproofing member such as the above, it is possible to improve the assembling workability of the waterproofing structure and reduce the cost, but it is possible to obtain a structure having a sufficient waterproofing structure. Further, since the back door trim is provided with the ribs, the strength of the back door trim is improved, so that the overall strength of the back door to which the back door trim is attached can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a hatchback type four-wheeled vehicle provided with a waterproof structure for a vehicle back door according to the present invention. FIG. 2 is an enlarged perspective view of a portion indicated by reference numeral X in FIG. FIG. 3 is an enlarged sectional view taken along line AA in FIG. 2; FIG. 4 is a cross-sectional view showing a main part of the back door and the back door trim when the back door is in an open position. FIG. 5 is a cross-sectional view showing the flow of rainwater in the back door when the back door is moved from the open position to the closed position. FIG. 6 is an exploded perspective view for explaining a waterproof structure of a conventional automobile back door. FIG. 7 is an enlarged sectional view taken along line BB in FIG. 6; [Description of Signs] 1 Hatchback type four-wheeled vehicle 2 Back door 3 Door outer panel 4 Door inner panel 5 Key cylinder mounting hole 6 Key cylinder 7 Work hole 8 Drain hole 9 Body 12 Back door trim 13 Body portion 14 Rib 15 Waterproof frame Material 16a Upper half 16b Lower half 17 Frame 18 Enclosure area 20 Rain water

Claims (1)

(57) [Claim 1] A door outer panel and a door inner panel are joined to each other in a closed sectional shape, and a key cylinder is attached to the outer panel in a penetrating state and corresponds to the key cylinder. A back door for an automobile, in which a working hole for assembling a key cylinder is formed at the position of the inner panel, wherein a rib is formed on a back door trim attached to an inner surface side of the door inner panel, and a waterproof frame member is provided. And forming a frame-shaped portion with the ribs and the waterproof frame material, and abutting the frame-shaped portion over the entire periphery of the working hole of the working hole, thereby forming the working hole of the inner panel. Surrounding
A flange formed on the frame, the frame-shaped portion, and the back
A water reservoir is formed with a part of the door trim, and when the back door is opened substantially horizontally, a key is provided.
The door outer panel is connected to the door through a cylinder mounting hole, etc.
Water that has entered between the inner panel and the
A waterproof structure for an automobile back door , wherein the water is stored to prevent the water from leaking into the passenger compartment on the side of the back door trim.