JP2019189114A - Adhesion structure of panel and adhesion method - Google Patents

Abstract

To provide an adhesion structure of a panel in which a shearing force is hardly applied on an adhesive layer for making an outer panel and an inner panel adhere to each other, and which can easily separate the outer panel and the inner panel which adhere to each other by the adhesive layer, and its adhesion method.SOLUTION: An adhesion structure in which an outer panel 30 and an inner panel 20 arranged at a rear surface side of the outer panel 30 adhere to each other comprises: an outer adhesion face 32a formed at a rear surface side of a design face 31a of the outer panel 30 in a direction intersecting with the design face 31a; an inner adhesion face 22a formed at the inner panel 20 while opposing the outer adhesion panel 32a; and an adhesive layer 40 for making the outer adhesion face 32a and the inner adhesion face 22a adhere to each other.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a panel bonding structure in which an outer panel and an inner panel are bonded, and a bonding method thereof.

  Conventionally, various panels in which an outer panel and an inner panel are bonded are known. For example, Patent Document 1 below proposes a resin panel mounting structure used for back doors, roof panels, and the like. In this mounting structure, a belt-like dam provided with a concave groove is attached to a steel plate inner panel or the like using a bolt, and an adhesive is accommodated in the concave groove to adhere a resin outer panel.

  In the following Patent Document 2, a resin back door in which a resin outer panel and a resin inner panel are bonded at an edge is proposed. In this resin back door, a concave portion or a constricted portion is provided between the bonding region and the rising portion, thereby preventing deterioration in appearance quality due to temperature change.

JP 63-154424 A JP2013-129265A

  However, in the conventional structure, when the outer panel and the inner panel are thermally expanded and contracted due to a temperature change, if there is a difference in thermal expansion between the outer panel and the inner panel, the adhesive layer that bonds the two panels has a shear direction. The power of was loaded. For this reason, there is a possibility that the adhesive layer deteriorates or breaks when the temperature is repeatedly changed.

  Therefore, an object of the present invention is to provide a panel bonding structure in which a shearing force is not easily applied to an adhesive layer that bonds an outer panel and an inner panel, and a bonding method thereof.

  The panel bonding structure of the present invention that solves the above problems is a panel bonding structure in which an outer panel and an inner panel arranged on the back side of the outer panel are bonded to each other on the back side of the design surface of the outer panel. , An outer adhesive surface provided in a direction intersecting with the design surface, an inner adhesive surface provided on the inner panel opposite to the outer adhesive surface, and an adhesive layer that bonds the outer adhesive surface and the inner adhesive surface And.

  In the panel bonding structure of the present invention, the outer panel preferably includes an outer main body portion having a design surface and an outer bent portion having an outer bonding surface which is bent from the outer main body portion to the back surface side. However, it has an inner end portion that has an inner bonding surface and abuts against the back surface of the outer main body portion.

  In the panel bonding structure of the present invention, the inner panel further includes an inner juxtaposed portion disposed along the design surface of the outer panel, and an inner bent portion bent from the inner juxtaposed portion, You may have an inner adhesion surface in an outer surface.

  The panel bonding method of the present invention that solves the above problems is a panel bonding method for bonding an outer panel and an inner panel disposed on the back side of the outer panel, and the outer body has a design surface on the outer panel. And an outer bent portion that is bent from the outer main body portion to the back surface side, an inner panel is provided with an inner end portion that faces the outer bent portion and contacts the rear surface of the outer main body portion, This is an adhesion method in which an end portion is brought into contact and an adhesive layer is filled between an outer bent portion and an inner end portion.

According to the panel bonding structure of the present invention, the outer bonding surface is provided on the back surface side of the design surface of the outer panel in a direction intersecting the design surface, and the inner bonding surface of the inner panel is opposed to the outer bonding surface. These outer bonding surfaces and inner bonding surfaces are bonded by an adhesive layer.
Therefore, when the outer panel undergoes thermal expansion or contraction in the direction along the design surface, a tensile force or a compressive force in a direction intersecting the both adhesive surfaces is applied between the outer adhesive surface and the inner adhesive surface. Therefore, it is possible to provide a panel bonding structure in which a shearing force is not easily applied to the adhesive layer that bonds the outer panel and the inner panel.

In the panel bonding structure of the present invention, the outer bent portion having the outer bonding surface is bent from the outer main body portion having the design surface, and the inner panel has an inner bonding surface facing the outer bonding surface. You may provide the inner edge part contact | abutted on the back surface of an outer main-body part.
According to such a configuration, by bringing the inner end portion into contact with the back surface of the outer main body portion, the inner bonding surface can be easily disposed opposite to the outer bonding surface, and the outer panel and the inner panel can be arranged at the time of bonding. It can be easily aligned and bonded.

In the panel bonding structure of the present embodiment, the inner panel includes an inner juxtaposed portion disposed along the design surface of the outer panel, and an inner bent portion bent from the inner juxtaposed portion. You may have an inner adhesion surface in an outer surface.
According to such a configuration, since the inner adhesive surface is provided on the outer surface of the inner bent portion bent from the inner juxtaposed portion, the inner adhesive surface is bonded to the opposite portion of the outer panel facing the outer adhesive surface. When performing various operations such as peeling and stripping, tools can be easily accessed to the bonding site, and workability can be improved.

According to the panel bonding method of the present invention, the outer panel is provided with an outer bent portion that is bent toward the back side of the design surface, and the inner panel is opposed to the outer bent portion and is in contact with the rear surface of the outer main body portion. A portion is provided, and an adhesive layer is filled and bonded between the outer bent portion and the inner end portion.
Therefore, the outer bent portion and the inner end portion are bonded by the adhesive layer so as to face each other in the direction intersecting the design surface. As a result, when the outer panel undergoes thermal expansion or contraction in the direction along the design surface, a tensile force or a compressive force in a direction intersecting the opposing surface is applied between the outer bent portion and the inner end portion. Therefore, it is possible to provide an adhesion method in which a panel in which shearing force is hardly applied to the adhesive layer that adheres between the outer panel and the inner panel can be obtained.

It is a perspective view of the back door provided with the adhesion structure of the panel concerning the embodiment of the present invention. It is a perspective view which shows the inner panel of the back door which concerns on embodiment of this invention. It is a front view which shows the outer panel of the back door which concerns on embodiment of this invention. It is a fragmentary sectional view which shows the AA cross section of the back door of FIG. (A)-(d) is a figure explaining sequentially the adhesion | attachment method of the outer panel and inner panel of a back door which concern on embodiment of this invention. (A), (b) is a figure explaining the state which the thermal expansion difference produced with the outer panel and the inner panel in the back door which concerns on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In this embodiment, the panel bonding structure of the present invention is applied to a resin back door. In each figure, Fr indicates the front of the vehicle body with the back door closed, Rr indicates the rear of the vehicle body, W indicates the vehicle width direction, H indicates the vehicle body upper side, and L indicates the vehicle body lower side.

  The resin back door 10 of the present embodiment shown in FIGS. 1 to 3 is attached to a rear opening of a vehicle body (not shown) so as to be opened and closed. In the resin back door 10, the adhesive structure of the present embodiment is provided in the back door lower portion 12 disposed in the closed state on the lower L side of the vehicle body of the rear glass 11. Reference numeral 13 denotes a rear spoiler disposed above the vehicle body H of the rear glass 11.

The lower L side of the vehicle body of the resin back door 10 is formed in a shape corresponding to the resin inner panel 20 provided with a window opening 14 in which the rear glass 11 is disposed and integrally formed, and the back door lower portion 12. The resin outer panel 30 and an adhesive layer 40 (see FIG. 4) for bonding the outer adhesive surface 32a and the inner adhesive surface 22a are provided.
Various reinforcements (not shown) and the like may be disposed inside the outer panel 30 and the inner panel 20.

  The outer panel 30 has a width equal to the width of the inner panel 20, and has an outer shape that covers the entirety below the rear glass 11 of the inner panel 20 with the resin back door 10 closed and an appropriate three-dimensional shape. have. The outer panel 30 includes an outer main body 31 having a design surface 31 a that is exposed to the outside and forms the appearance of the vehicle body, and an outer panel provided on the outer peripheral portion 33 of the outer main body 31 by being bent from the outer main body 31 to the back side. And a bent portion 32 (shown in FIG. 4).

  The design surface 31a of the outer main body 31 includes a smooth surface formed of a flat surface or a smooth curved surface, and an uneven surface formed in an appropriate three-dimensional shape. In the present embodiment, the design surface 31a in the outer peripheral portion 33 of the outer main body portion 31 is constituted by a smooth surface. The outer peripheral part 33 of the outer main body part 31 and the intermediate part 34 surrounded by the outer peripheral part 33 are continuous without partitioning.

  The outer bent portion 32 may be provided in a part of the outer peripheral portion 33 of the outer main body portion 31, but in the present embodiment, the outer bent portion 32 is provided continuously over the entire circumference of the outer peripheral portion 33, and from the outer main body portion 31. Molded continuously. In the present embodiment, the outer bent portion 32 is formed to be bent at a substantially right angle in a substantially L-shaped cross section toward the back surface with a thickness substantially equal to that of the outer main body portion 31.

  On the inner side surface of the outer bent portion 32, that is, on the surface on the valley fold side of the outer bent portion 32, an outer adhesive surface 32 a bonded by the adhesive layer 40 is provided. By setting the outer bonding surface 32a at such a position, the outer bonding surface 32a is provided on the back surface side of the design surface 31a of the outer panel 30 and in a direction intersecting the design surface 31a. Here, the outer adhesive surface 32a is formed as a surface substantially perpendicular to the vehicle width direction W.

  In the present embodiment, the outer adhesive surface 32 a is provided at a position separated from the back surface of the outer main body portion 31. Further, the outer adhesive surface 32a is constituted by a modified surface that has been subjected to a primer treatment for improving the adhesiveness with the adhesive layer 40.

  The inner panel 20 has an outer shape corresponding to the rear opening of the vehicle body, is provided with a window opening 14 and is integrally formed of resin. The inner panel 20 includes an inner main body portion 21 that is disposed opposite to the outer main body portion 31 of the outer panel 30 and an inner end portion 23 that is disposed in the vicinity of the outer peripheral portion 33 of the outer main body portion 31. Yes.

  The inner end portion 23 is provided so as to contact the back surface of the outer main body portion 31. The inner end 23 may be provided at a part of the periphery of the inner main body 21, but in the present embodiment, the inner end 23 is continuously provided without any boundary around the inner main body 21. The inner end portion 23 includes an inner juxtaposed portion 24 disposed along the design surface 31a at a position separated from the back surface of the outer panel 30, and an inner bent portion 22 bent from the inner juxtaposed portion 24 to the outer panel 30 side. The inner bent portion 22 is in contact with the back surface of the outer panel 30.

The inner bent portion 22 is formed continuously from the inner juxtaposed portion 24. In the present embodiment, the inner bent portion 22 is formed with a substantially equal thickness to the inner juxtaposed portion 24 and bent at a substantially right angle in a substantially L-shaped cross section toward the outer panel 30 side.
An inner bonding surface 22 a bonded by the adhesive layer 40 is provided on the outer surface of the inner bending portion 22, that is, the surface on the mountain fold side of the inner bending portion 22. By setting the inner bonding surface 22a at such a position, the inner bonding surface 22a is provided so as to face the outer bonding surface 32a of the outer panel 30 so as to face the outer bonding surface 32a in a state of being slightly spaced from each other at a predetermined interval. Here, the inner bonding surface 22 a is formed as a surface substantially perpendicular to the vehicle width direction W.

  In the present embodiment, the inner bonding surface 22 a is provided at a position separated from the edge of the inner bent portion 22 in the inner end portion 23 so that the inner bonding surface 22 a is separated from the back surface of the outer main body portion 31. Further, the inner adhesive surface 22a is constituted by a modified surface on which a primer treatment for improving the adhesiveness with the adhesive layer 40 is performed.

The adhesive layer 40 is disposed in a state where the inner panel 20 is disposed on the rear surface side that is the vehicle compartment side of the outer panel 30 and the edge of the inner bent portion 22 is disposed in contact with the rear surface of the outer main body portion 31. The adhesive is filled between the outer adhesive surface 32a and the inner adhesive surface 22a facing each other.
Although the adhesive layer 40 is filled and solidified or hardened substantially between the outer bent portion 32 and the inner bent portion 22 facing each other, the space between the outer bonded surface 32a and the inner bonded surface 22a is strong. The adhesive strength is remarkably low even if it adheres to the other parts.

Next, a method for manufacturing such a resin back door 10 will be described.
In order to manufacture the resin back door 10, first, as shown in FIG. 5A, the outer panel 30 and the inner panel 20 are previously formed into a predetermined shape with a resin.
As the resin, a resin that satisfies conditions such as strength required for the resin back door 10 is used, but in this embodiment, the surface after molding cannot obtain sufficient adhesive strength with the adhesive layer 40, and A resin that can provide sufficient adhesion strength by modifying the surface by primer treatment is used. The outer panel 30 and the inner panel 20 may be formed of the same resin or different resins.

  The outer panel 30 is provided with an outer main body portion 31 having a design surface 31a and an outer bent portion 32 bent from the outer main body portion 31, and the inner panel 20 is provided with an inner main body portion 21 and an inner bent portion 22. And an inner end portion having the inner end portion.

  The outer bonding surface 32 a is formed by applying a primer treatment to the inner side surface of the outer bent portion 32 of the outer panel 30 so as to be positioned away from the outer main body portion 31. On the other hand, a primer treatment is applied to the outer surface of the inner bent portion 22 of the inner panel 20 so as to be positioned away from the edge of the inner bent portion 22 to form the inner adhesive surface 22a.

  The primer treatment is a treatment for improving the adhesion with the adhesive layer 40 by modifying the surface properties of the outer bent portion 32 and the inner bent portion 22. As the primer treatment, an appropriate treatment can be employed depending on the material of the outer panel 30 and the inner panel 20, the material of the adhesive for forming the adhesive layer 40, and the like.

  In this embodiment, for example, when polypropylene is used as the outer panel 30 and the inner panel 20 and a urethane-based adhesive is used as the adhesive of the adhesive layer 40, a polyisocyanate-based primer solution may be applied as a primer treatment.

  As shown in FIG. 5B, after the primer treatment, the inner panel 20 is disposed opposite to the back surface side of the outer panel 30, and the edge of the inner bent portion 22 of the inner panel 20 is contacted with the back surface of the outer main body portion 31. Touch. Accordingly, the outer adhesive surface and the inner adhesive surface 22a are opposed to each other.

Next, as shown in FIG. 5C, the nozzle 41 is inserted from the inner panel 20 side into the gap between the outer bent portion 32 and the inner bent portion 22. Then, as shown in FIG. 5D, an adhesive for forming the adhesive layer 40 is filled in the gap between the outer bent portion 32 and the inner bent portion 22.
Thereafter, the adhesive layer 40 is formed by curing or solidifying the adhesive. Thus, the outer adhesive surface 32a of the outer bent portion 32 and the inner adhesive surface 22a of the inner bent portion 22 are bonded by the adhesive layer 40 with a sufficient adhesive force.
As described above, the resin back door 10 having the adhesive structure of the present embodiment can be manufactured.

  According to the adhesive structure of the resin back door 10 of the present embodiment as described above, the outer adhesive surface 32a is provided on the back surface side of the design surface 31a in the outer panel 30 in a direction intersecting the design surface 31a. The inner bonding surface 22a of the inner panel 20 is provided opposite to the outer bonding surface 32a, and the outer bonding surface 32a and the inner bonding surface 22a are bonded by the adhesive layer 40.

  Therefore, when the outer panel 30 undergoes thermal expansion or thermal contraction in the direction along the design surface 31a, the tensile force in the direction intersecting both the adhesive surfaces 22a and 32a is between the outer adhesive surface 32a and the inner adhesive surface 22a. Compressive force is applied. That is, when the resin back door 10 as shown in FIG. 1 is subjected to a temperature change during manufacture such as a painting process or when used while being mounted on a vehicle body, the outer panel 30 and the inner panel 20 are each subjected to thermal expansion or Heat shrinks.

At this time, if the outer panel 30 is thermally expanded larger than the inner panel 20 due to, for example, the material, shape, temperature distribution, etc., as shown in FIG. 6A, the outer bonding surface 32a and the inner bonding surface 22a are mutually spaced. Pulled in the direction of separation. Then, a tensile force is applied to the adhesive layer 40. Therefore, the shear force is hardly applied to the adhesive layer 40 between the outer panel 30 and the inner panel 20, and peeling of the adhesive layer 40 can be prevented.
Furthermore, since this tensile force is absorbed by the elasticity of the adhesive layer 40, the deflection of the outer panel 30 can be absorbed.

  On the other hand, when the inner panel 20 is thermally expanded larger than the outer panel 30, as shown in FIG. 6B, the outer adhesive surface 32a and the inner adhesive surface 22a are compressed in a direction close to each other. Then, a compressive force is applied to the adhesive layer 40. Therefore, it is difficult to apply a shearing force to the adhesive layer 40, and peeling of the adhesive layer 40 can be prevented.

  Therefore, in the bonding structure of the resin back door 10, it is difficult to apply a shearing force to the adhesive layer 40 that bonds the outer panel 30 and the inner panel 20. As a result, a shearing force is not applied to the adhesive layer 40 and the adhesive layer 40 is not destroyed, and peeling due to thermal expansion and contraction between the outer adhesive surface 32a and the inner adhesive surface 22a can be reliably prevented.

  In the adhesive structure of the resin back door 10 of the present embodiment, the outer bent portion 32 having the outer adhesive surface 32a is provided by being bent from the outer main body portion 31 having the design surface 31a. The inner panel 20 includes an inner end portion 23 that has an inner bonding surface 22 a that faces the outer bonding surface 32 a and contacts the back surface of the outer main body portion 31. Therefore, by bringing the inner end portion 23 into contact with the back surface of the outer main body portion 31, the inner bonding surface 22a can be easily disposed opposite to the outer bonding surface 32a, and the positions of the outer panel 30 and the inner panel 20 at the time of bonding. They can be easily aligned and bonded.

  In the adhesive structure of the resin back door 10 of the present embodiment, the outer adhesive surface 32a and the inner adhesive surface 22a face each other in the direction intersecting the design surface 31a on the back surface side of the design surface 31a of the outer panel 30. It is glued. Therefore, when it becomes necessary to separate the outer panel 30 and the inner panel 20, it is possible to easily perform an operation of breaking the adhesive layer 40 by inserting a tool between the outer adhesive surface 32a and the inner adhesive surface 22a. The inner panel 20 and the outer panel 30 can be easily separated.

  In particular, in the present embodiment, the outer adhesive surface 32 a and the inner adhesive surface 22 a that are bonded by the adhesive layer 40 are provided at positions separated from the back surface of the outer main body portion 31. For this reason, the bonding portion between the outer bonding surface 32 a and the inner bonding surface 22 a is separated from the back surface of the outer main body 31. Therefore, by inserting a tool or the like between the outer adhesive surface 32a and the inner adhesive surface 22a to destroy the adhesive layer 40, the outer adhesive surface 32a and the inner adhesive surface 22a can be easily separated, and the outer panel 30 and the inner panel 20 can be separated more easily.

  For example, when one of the outer panel 30 and the inner panel 20 of the resin back door 10 is damaged or deteriorated, the other can be replaced. That is, when one of the outer panel 30 and the inner panel 20 needs to be replaced, a cutter or the like is inserted from the inner panel 20 side between the outer bonding surface 32a and the inner bonding surface 22a. Thereby, the adhesive layer 40 that bonds the outer adhesive surface 32a and the inner adhesive surface 22a can be cut and destroyed, and the outer adhesive surface 32a and the inner adhesive surface 22a can be separated. The resin back door can be used again by exchanging one of the outer panel 30 and the inner panel 20 and again bonding the outer bonding surface 32a and the inner bonding surface 22a.

  In the bonding structure of the resin back door 10 according to the present embodiment, the inner panel 20 includes an inner juxtaposed portion 24 disposed along the design surface 31 a of the outer panel 30, and an inner bent portion bent from the inner juxtaposed portion 24. 22, and has an inner bonding surface 22 a on the outer surface of the inner bent portion 22.

  Therefore, since the inner bonding surface 22a is provided on the outer side surface of the inner bent portion 22 bent from the inner juxtaposed portion 24, the inner bonding surface 22a is bonded to a facing portion where the inner bonding surface 22a is opposed to the outer bonding surface 32a of the outer panel 30. When performing various operations such as peeling work and peeling work, it becomes easy to move the bonding work tool and the peeling work tool from the outside in the vehicle width direction to access the bonded portion, and workability can be improved.

  Further, according to the bonding method of the resin back door 10 of the present embodiment, the outer panel 30 is provided with the outer bent portion 32 that is bent toward the back surface side of the design surface 31 a, and the inner panel 20 is opposed to the outer bent portion 32. At the same time, an inner end 23 that contacts the back surface of the outer main body 31 is provided, and the adhesive layer 40 is filled between the outer bent portion 32 and the inner end 23 and bonded.

  Therefore, the outer bent portion 32 and the inner end portion 23 are bonded by the adhesive layer 40 so as to face each other in the direction intersecting the design surface 31a. Thereby, when the outer panel 30 undergoes thermal expansion or contraction in the direction along the design surface 31a, a tensile force or a compressive force in a direction intersecting the opposing surface is formed between the outer bent portion 32 and the inner end portion 23. Be loaded. Therefore, it is possible to manufacture the resin back door 10 in which a shearing force is not easily applied to the adhesive layer 40 that bonds the outer panel 30 and the inner panel 20.

  According to the bonding method of the resin back door 10 of the present embodiment, the outer bonding surface 32a subjected to the primer treatment is formed on the inner surface of the outer bent portion 32 at a position separated from the outer main body portion 31, and the inner After the inner bonding surface 22a subjected to the primer treatment is formed at a position separated from the edge of the end portion 23, the adhesive layer 40 is filled.

  Therefore, the outer bonding surface 32 a and the inner bonding surface 22 a are bonded by the adhesive layer 40 at a position separated from the back surface of the outer main body portion 31. At this time, the primer layer is not applied to the position near the back surface of the outer main body 31 in the outer bent portion 32 and the position near the edge of the inner end portion 23, so that the filled adhesive layer 40 comes into contact. Even if it is, it will not adhere. Therefore, the resin back door 10 that can easily separate the outer panel 30 and the inner panel 20 bonded by the adhesive layer 40 can be manufactured.

Each of the above embodiments can be appropriately changed within the scope of the present invention.
For example, in each of the above-described embodiments, the panel having the adhesive structure of the present invention has been described using the example of the back door lower portion 12 disposed in the vehicle body lower side L of the rear glass 11 in the resin back door 10, but is particularly limited. It is not a thing. For example, the adhesive structure of the present invention can be applied even to the rear spoiler 13 disposed above the vehicle body H of the rear glass 11 in the resin back door 10.
Moreover, in each said embodiment, although the resin-made outer panels 30 and the resin-made inner panels 20 were adhere | attached, it is not limited to a resin-made panel at all. As long as the panel is made of a material that can be bonded with an adhesive, either or both of them may be made of a material other than resin.

  Further, the present invention is not limited to the back door, and the present invention can be applied in the same manner as in the above embodiment as long as the outer panel having a predetermined shape and the inner panel having the predetermined shape are bonded with an adhesive. It is. Such a panel may be, for example, a roof panel, various hood panels, various door panels, or the like.

DESCRIPTION OF SYMBOLS 10 Resin back door 11 Rear glass 12 Back door lower part 13 Rear spoiler 14 Window opening 20 Inner panel 21 Inner main body part 22 Inner bending part 22a Inner adhesive surface 23 Inner edge part 24 Inner side-by-side part 30 Outer panel 31 Outer main body part 31a Design surface 32 outer bent portion 32a outer adhesive surface 33 outer peripheral portion 34 intermediate portion 40 adhesive layer 41 nozzle

Claims (4)

An outer panel and an inner panel disposed on the back side of the outer panel are bonded structures of the panel,
On the back side of the design surface in the outer panel, an outer adhesive surface provided in a direction intersecting the design surface;
An inner adhesive surface provided on the inner panel facing the outer adhesive surface;
An adhesive layer that bonds the outer adhesive surface and the inner adhesive surface;
Adhesive structure of panel with The outer panel includes an outer main body portion having the design surface, and an outer bent portion having the outer adhesive surface provided by being bent from the outer main body portion to the back surface side,
The said inner panel is an adhesion structure of the panel of Claim 1 provided with the inner end part which has the said inner adhesion surface and contact | abuts to the back surface of the said outer main-body part.   The inner panel includes an inner juxtaposed portion disposed along the design surface of the outer panel, and an inner bent portion bent from the inner juxtaposed portion, and the inner panel is provided on an outer surface of the inner bent portion. The panel adhesive structure according to claim 1, wherein the panel has an adhesive surface. A panel bonding method for bonding an outer panel and an inner panel disposed on the back side of the outer panel,
The outer panel is provided with an outer main body portion having a design surface, and an outer bent portion bent from the outer main body portion to the back surface side,
The inner panel is provided with an inner end portion that is opposed to the outer bent portion and contacts the back surface of the outer body portion,
A panel bonding method, wherein the inner end portion is brought into contact with the back surface of the outer main body portion, and an adhesive layer is filled between the outer bent portion and the inner end portion.

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