JPS60248429A - Door structure for car - Google Patents

Abstract

PURPOSE:To prevent rust formation and improve the durability for the weather- strip reaction force by joining a door outer panel whose lower part is made of synthetic resin and a door inner panel made of steel plates on a weather-strip installation surface. CONSTITUTION:The lower half 1b of a door outer panel 1 is formed integrally up to the weather-strip installation surface 6 of a door inner panel 2, and a plurality of drainholes 5 are formed at the bottom part. The lower edge of the door inner panel 2 made of steel plates is formed up to the weather-strip installation surface 6 by a clip 8. The lower half 1b of the door outer panel 1 and the door inner panel 2 are fixed through adhesion on the weather-strip installation surface 6.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an automobile door structure, and particularly to an improvement of an automobile door structure in which a portion of the door panel is made of synthetic resin.

(Prior Art) As an automobile door structure in which a part of the door panel is made of synthetic resin, a structure as shown in FIGS. 4 and 5 is known (Japanese Utility Model Publication No. 57-148918). In this door structure, the door outer panel l is divided into upper and lower halves, and the lower half part 1b is made of synthetic resin, in order to prevent rust caused by scratches caused by pebbles etc. thrown up while the car is running.

To explain the structure, the door outer panel l consists of an upper half part 1a made of a steel plate and a lower half part 1b made of synthetic resin, and an engaging part 8 in which the lower edge of the upper half part 1a engages with the upper edge of the lower half part 1b. are provided, and these are engaged and bonded at the engagement portion 8, and the side protector 4 is bonded thereon to cover the joint portion. On the other hand, the lower edge of the lower half portion 1b is adhesively fixed to the flange portion 2a of the door inner panel 2 made of a steel plate. A plurality of drain holes 5 are provided at the bottom of the door inner panel 2 to drain rain water, car wash water, etc. that has entered the door body to the outside of the vehicle. In addition, a weather strip 7 is installed on the door inner panel 2 to prevent water from entering from the outside.
It is fixed to the weatherstrip mounting surface 6 with a clip 8, and the tip of the weatherstrip 7 is pressed against the sill 9 to seal it.

(Problem to be solved by the invention) However, in such conventional automobile door structures, only the lower half of the door outer panel is made of synthetic resin, and this lower end is connected to the flange at the lowest end of the door inner panel. Rust may occur from the end face of the drain hole 5, which is provided to drain water that has entered the door body, or water that remains without being drained may cause damage. When the flange portion 2a of the door inner panel 2 rusts (
・There was a problem. Furthermore, the lower half part 1b and the flange part 2a
There was a problem when the adhesive used to fix the parts protruded from the edges.

(Other prior art) In order to solve this problem, a door structure as shown in Fig.
8). This door structure is made by integrally molding the lower half 1b of the door outer panel 1 and the lower half 2b of the door inner panel 2 from a synthetic resin material.

(Problem to be solved by the invention) However, in this door structure, the lower half of the door body is made of synthetic resin material, which has lower rigidity than steel plate, so the rigidity of the entire door is low, and the panel is permanently attached. Deformation may occur, resulting in poor engagement with the door lock, or the relationship between the door lock and the body may change, resulting in poor sealing, and weather stripping. Since it is directly fixed to the lower half 2bK of the door inner panel, the adhesive may peel off over time or cracks may occur in the resin panel. Furthermore, the weather strip 7 is attached to the upper part of the door (the upper half 2a of the door inner panel made of steel plate).
The lower part is fixed to the lower half of the synthetic resin door inner panel, but since steel plates and synthetic resin materials have different coefficients of thermal expansion, the door weather strip 7 and the vehicle body may not interact at high or low temperatures. There were problems such as the relative position being awkward and the sealing performance of the weather strip being poor.

(Means for Solving the Problems) In order to solve these conventional problems, the automobile door structure of the present invention has a door outer panel whose entire surface is made of synthetic resin and a lower half of which is made of steel plate. An automobile door structure comprising a door inner panel is characterized in that the door outer panel and the door inner panel are joined at a surface for attaching a weather strip.

(for fll:) With this structure, this door structure can eliminate the occurrence of rust on the lower edge of the door, and can also provide sufficient rigidity to the weather strip mounting surface. The automobile door structure of the present invention will be explained in detail.

FIG. 1 is a diagram showing an embodiment of the automobile door structure of the present invention.

First, to explain the structure, the lower half 1b of the door outer panel 1 is integrally molded up to the surface 6 on which the weather strip of the door inner panel 2 is attached, and several drainage holes 5 are provided at the bottom thereof. - The lower end of the door inner panel 2 made of a lucky board is molded to a weather strip mounting surface 6, and this weather strip mounting is performed by fixing a weather strip 7 to the surface 6 with a clip 8. The lower half 1b of the door outer panel 1 and the door inner panel 2 are adhesively fixed at the surface 6 for attaching the weather strip. Note that the upper edge of the lower half Ib of the door outer panel l is provided with an engaging portion 8 as in the prior art and is adhesively fixed to the upper half 1a of the door outer panel I.

Next, the action will be explained. Rainwater, car wash water, etc. that have entered the door body are drained from the drain hole 5 provided in the lower half of the synthetic resin door outer panel, but even if it is not completely drained, this part is made of synthetic resin. Since it is molded, rust will not occur.

In addition, the reaction force generated when the weather strip 7 closes the door is received by the door inner panel 2, which is made of a steel plate that is more rigid than the synthetic resin, so the negative phase applied to the adhesive part and the resin panel is reduced, increasing the rigidity and durability of the door. You can keep your sexuality high. Furthermore, the adhesive between the door inner panel 2 and the lower half ib of the door outer panel is located above the lower edge of the lower half 1b of the door outer panel in the direction of the vehicle interior, so even if the adhesive were to protrude, it would not be visible from the outside. Figure 2 shows a barrier 1 showing another embodiment of the present invention.

In this embodiment, the lower edge of the lower half 1b of the door outer panel is continuously formed into a generally U-shape, and the end thereof is adhesively fixed to the weather strip mounting surface 6 of the door inner panel 2.

In this embodiment, the same effects as those of the previous embodiment can be obtained, and the lower half 1b of the door outer panel can be easily formed. In the case where it is branched from the middle and extended to the weather strip mounting surface 6, the lower half fjli
When molding 1 kl using synthetic resin, the branched portion may become depressed due to the sink mark K of the resin, resulting in poor appearance quality, but the embodiment shown in FIG. 2 has the advantage of not having such a risk.

FIG. 8 is a diagram showing still another embodiment of the present invention, in which the mounting structure of the weather strip is devised. In both the embodiments shown in FIGS. 1 and 2, a clip 8 is embedded in the weather strip 7 and fixed by inserting the clip 8 into a hole provided in the door inner panel 2. In the embodiment, the end 11 of the door inner panel 2 is formed into a substantially U-shape, and a protrusion 10 is formed on the bottom surface of the door inner panel 2, and the weather strip 7 is fitted into the end 11 and the raised part 10. It is fixed together.

In order to install the weather strip as shown in Figure 2, the structure requires a clip 8, and the work of burying the clip 8 is troublesome.In addition, it is difficult to install the weather strip because it must be inserted by hitting it with a plastic hammer etc. Although the performance is not good and it is disadvantageous in terms of cost, this 8th
The mounting of the weather strip as shown in the figure is structurally easy to install and can reduce costs.

(Effects) As explained above, the automatic military door structure of the present invention has a structure in which the door outer panel, in which at least the lower part of the panel is made of synthetic resin, and the door inner panel, which is made of steel plate, are joined at the surface for mounting the weather strip. Not only does this eliminate rust caused by rainwater or car wash water that enters the door body, but it also sufficiently withstands the reaction force generated by the weather strip, improving durability. In addition, even if #adhesive protrudes from the joint, it will not cause a gap in appearance, so it can be easily adhered without controlling the application qK adhesion range, application range, etc. Furthermore, the weather strip can be applied to the entire circumference of the steel plate door inner panel. K 1iAj 9, the relative position with respect to the body can be ensured with a good degree of 4', and the effect that good sealing performance can be ensured is achieved.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing the structure of one embodiment of the automobile door structure of the present invention, FIG. 2 is a cross-sectional view showing the structure of another embodiment of the present invention, and FIG. 8 is a cross-sectional view showing the structure of another embodiment of the present invention. 4 is a front view of an example of a conventional automobile door structure; FIG. 5 is a sectional view taken along line A-A in FIG. 4; FIG. 6 is a conventional automobile door structure. It is a sectional view showing other examples. l... Door outer panel 1a... Upper half 1b...
・Lower half 2...Door inner panel 2a...Flange part B...Engagement part 4...Side protector 5.
・・Drain hole 6・・1 side with weather strip ・7
...Weather strip 8...Clip 9...Sill 1o...Protrusion 11...End portion. Patent applicant Nissan Motor Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Scope of Claims] 1. In an automobile door structure in which at least the lowermost part of the panel is composed of a door outer panel made of synthetic resin and a door inner panel made of a steel plate, the weather strip is attached on the surface of the door outer panel and the door inner panel. An automobile door structure characterized by being joined. (a) The automobile door structure according to claim 1, wherein the mounting surface of the weather strip is formed by flange portions standing upright at the ends of the inner panel and the outer panel.