JPS6268180A - Connection structure of shell panel made of resin for car body - Google Patents

Abstract

PURPOSE:To improve the finishing of a connection when a metal inner plate panel is connectively bonded on the connecting flange to the inside surface of a resin outer plate panel by forming a recess shaped to conform to the connecting flange in the inside surface of the shell panel and filled with adhesives. CONSTITUTION:A metal inner plate panel 1 is secured fixedly to a resin shell panel 4 line an engine hood outer panel by bonding a connecting flange 1a formed on the outer periphery of said panel 1 to the outer periphery of inside furface 4a of said panel 4 through adhesives 5. The shell panel 4 is formed on the outer periphery of inside surface 14a with a recess 6. That is, the shell panel 4 is formed on the outer periphery of inside surface 4a with a pair of projecting streaks 7A, 7B spaced an interval L2 slightly larger than the width L1 of the connecting flame 1a from each other to define the recess 6 between both streaks 7A, 7B. And this recess 6 is filled with adhesives 5 to interconnect both panel 1, 4.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an automobile body structure, and more particularly to a bonding structure of a metal inner panel to a resin outer panel.

1. Prior Art - In a metal outer panel constituting the outer surface of an automobile body, for example, an engine hood outer panel as shown in FIG.
Since it is required to maintain a good appearance, spot welding cannot be performed between metal inner panels such as engine hood inner panels when joining them.
For this reason, conventionally, as shown in FIGS. 5 and 6,
The outer periphery of the engine hood outer panel 2 is folded back toward the joining flange la of the engine hood inner panel (i.e., the metal inner panel 1) to form a hemming portion 2a, and the metal outer panel and the metal inner panel l are joined together. There is. Note that numerals 3A and 3B in FIGS. 4 and 5 are hood hinge reinforcements (for example, see Sankai Seishi Co., Ltd., "Automotive Engineering Zensho", Vol. 13, page 144).

-Problems to be Solved by the Invention- Incidentally, recently, attempts have been made to mold the exterior panels as described above with resin in order to reduce the weight of the car body and to make it easier to mold. With this resin outer panel, it is difficult to join the metal inner panel 1 by hemming the outer periphery thereof. Therefore, in the case of a resin outer panel, the joining flange 1at of the metal inner panel 1 is bonded to the inner surface of the resin outer panel using an adhesive. If adhesive is simply applied to the joint flange 1a of the plate panel 1 and bonded to the inner surface of the resin outer panel, the relative position of the resin outer panel and the metal inner panel 1 will shift before the adhesive hardens. This may cause problems when assembling with other body panels. In addition, in the assembly process of such a resin outer panel and the metal inner panel 1, the adhesive flows out from the joint flange la of the metal inner panel 1 before solidifying, and the resin of the stacked lower layer In some cases, it dripped onto the outer surface of the exterior panels, staining the surrounding area. Furthermore, the end face of the joining flange 1a formed on the metal inner panel l is a cut end face that is prone to rust, but with the joining structure as described above, it is difficult to cover the cut end face with adhesive. , corrosion often occurs from the end face of the joining flange 1a.

In view of the difficulty of the joining structure between a resin outer panel and a metal inner panel as described above, an object of the present invention is to improve the relative position of the resin outer panel and the metal inner panel when joining the resin outer panel and the metal inner panel. To obtain a joining structure of a resin outer panel and a metal inner panel, which does not shift or cause adhesive to flow out, and prevents the cut end of a joining flange on the metal inner panel from rusting.

Means for Solving a Problem - To achieve this object, the present invention provides a joint structure for a resin outer panel in which a joining flange of a metal inner panel is bonded to the inner surface of a resin outer panel. The present invention proposes forming a recess in a shape corresponding to the joining flange on the inner surface of the resin outer panel to which the joining flange is bonded, and filling the recess with an adhesive.

One Embodiment - Hereinafter, details of an embodiment of the present invention will be described with reference to FIGS. 1 to 3.

FIG. 1 is an enlarged cross-sectional view of the main parts of the first embodiment of the present invention, in which reference numeral 4 indicates a resin outer panel, reference numeral 1 indicates a metal inner panel, and the outer periphery of the metal inner panel l. The joint flange la formed in the resin outer panel 4 is fixed to the outer confinement portion of the inner surface 4a of the resin outer panel 4 with an adhesive 5. The feature of the first embodiment is that the joining flange 1a of the metal inner panel l is joined to the recess 6 formed on the outer periphery of the inner surface 4a of the resin outer panel 4.
The point is that the metal inner panel 1 is joined to the resin outer panel 4 by the adhesive 5 filled inside. That is, in the case of the first embodiment, a pair of protrusions are provided on the outer periphery of the inner surface 4a of the resin outer panel 4 with a spacing L2 slightly larger than the width L1 of the joining flange 1a of the metal inner panel l. Article 7A, 7
B is integrally molded, and a recess 6 for receiving the joining flange 1a is formed between these protrusions 7A and 7B.

When the joint flange 1a of the metal inner panel 1 is formed over the entire circumference of the metal inner panel 1, these protrusions 7A and 7B are formed on the inner surface 4a of the resin outer panel 4 over the entire circumference. It is molded into a corresponding frame shape.

When the joint flange la is a partial flange, it is shaped like a frame surrounding the partial flange. Further, the protrusions 7A and 7B of the present invention are not necessarily required to be frame-shaped, but may be parallel protrusions along both sides of the joint flange la, and in short, the protrusions 7A and 7B are not necessarily frame-shaped. Any device may be used as long as it can specify the relative position of the metal inner panel l to the inner metal panel 4 and prevent the adhesive 5 from flowing out in the same gate 6.
FIG. 3 shows the hood III-IIri shown in FIG.
This is an embodiment of the present invention applied to a cross section along .

Since the first embodiment has the above-described structure, when joining the resin outer panel 4 and the metal inner panel 1, the metal inner panel l is placed in the recess 6 of the inner surface 4a of the resin outer panel 4. The relationship a between the resin outer panel 4 and the metal inner panel l is determined by simply inserting the joining flange la.

Since this relationship is determined by the fit between the recess 6 and the joining flange la, the relationship between the resin outer panel 4 and the metal inner panel l will not be disturbed later. The resin outer panel 4 and the metal inner panel l can be joined by applying the resin and fitting the joining flange la into the corresponding recess 6. At the time of this adhesion, the adhesive 5 has protrusions 7A,
Since it is filled into the recess 6 divided by 7B, the dropped adhesive 5 will not flow out until it solidifies.
The adhesive 5 in the recess 6 does not adhere to the outer surface of the stacked lower layer resin outer panel 4 and cause the resin outer panel 4 to become dirty. When inserted into the recess 6 as shown in the figure, it fills the cut end surface of the joint flange 1a and covers the cut end surface of the joint flange 1a. This prevents rust from forming on the cut end surface, and also prevents joint failure due to insufficient adhesive at the joint. It doesn't happen.

FIG. 2 is an enlarged cross-sectional view of a main part of a joining structure according to a second embodiment of the present invention, and in this embodiment, a resin outer panel 4
The recess 6A is formed by reducing the thickness L3 of the outer periphery of the inner surface 4a.

That is, the recess 6A of this embodiment is in the form of a groove for receiving and positioning the joining flange la, similar to the recess 6 described with reference to FIG. In order to secure the space, the thickness L of the joining flange 1a is
Of course, the thickness of the resin outer panel 4 at the portion corresponding to the recess 6A should be such that it cannot be unraveled by the adhesive 5 to the outer surface of the resin outer panel 4.

Since the second embodiment has the above-described structure, there is no deviation in the relative position of the resin outer panel 4 and the metal inner panel 1, and the position before solidification is the same as in the first embodiment. The adhesive 5 does not flow out from the recess 6A, and the joining flange 1
It is possible to obtain a joint structure in which rust does not develop from the cut end surface of a.

Effects of the Invention As is clear from the above description, according to the present invention, when joining a metal inner panel to a lightweight resin outer panel with excellent moldability, the resin outer panel Since the adhesive can be applied to the recess on the inner surface, the adhesive will not protrude into unnecessary areas, and since the joining flange is fitted into the recess, the relative position of the resin outer panel and the metal inner panel can be adjusted. is obtained precisely, the positional relationship between the two is not disturbed before the adhesive hardens, there is no risk of the adhesive flowing out from the adhesive part, and the cut end surface of the joining flange is covered with the adhesive that fills the recess. Therefore, it is possible to prevent rust from forming on the rotating parts. Of course,
According to the uninvented joining structure, by applying adhesive to the recesses, a structure with high workability, stable quality, and a good finish can be obtained.

[Brief explanation of drawings]

FIG. 1 is an enlarged cross-sectional view of a main part of a joint structure according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view corresponding to FIG. 1 of a joint structure according to a second embodiment of the present invention, and FIG. FIG. 4 is an exploded perspective view of a conventional engine hood, FIG. 5 is a sectional view taken along line IV-IV in FIG. 3, and FIG. 3 is a sectional view taken along line V-V in FIG. 3. FIG. l...Metal inner plate panel, la...Joining flange (of metal inner plate panel) 4...
Resin exterior panel. 5... Adhesive, 6.6A... Recess. Patent Applicant Nissan Motor Co., Ltd. Tsuboj Kusai Tsubo 2 Diagram

Claims (1)

[Claims] 1) In a resin outer panel joint structure in which a joining flange of a metal inner panel is bonded to the inner surface of a resin outer panel, a bonding flange is attached to the inner surface of the resin outer panel to which the joining flange is bonded. A joint structure of a resin outer panel for a car body, characterized in that a recess of a corresponding shape is formed and the recess is filled with an adhesive.