JP2001151154A - Fixing structure and fixing method of resin outside plate in automobile body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the peeling work of a resin roof panel while stabilizing the adhesion quality of the roof panel to a roof side rail and improving the adhesive strength. SOLUTION: The flange parts 2 and 2 of an outer panel 1a and inner panel 1b for forming a roof side rail 1 are mutually welded with a difference in level, and a curved tub 11 is formed at the terminal part of a roof panel 13, and a stepped adhesive filling space 16 is formed by its inside surface 12, the flange parts 2 and a weld bead 8. A heel part 15 is protrusively formed in the deep part of the inside surface 12. An adhesive 14 is filled in the adhesive filling space 16 so as to bury the weld bead 8. To peel the roof panel 13, the tub 11 is peeled with the heel part 15 as a fulcrum by the principle of lever.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing structure and a fixing method for a resin outer panel in an automobile body, and more particularly, to forming an outer panel such as a roof of a vehicle body component with a resin and closing the resin panel. The present invention relates to a fixing structure and a fixing method for a resin outer plate which is adhesively fixed to a vehicle body formed with a vehicle body skeleton member having a cross-sectional structure.

[0002]

2. Description of the Related Art As a part of resinification of vehicle body outer panel parts, a roof panel is formed into a three-dimensional shape with a resin which has been colored in advance, and this resin panel serves as a body frame member such as a roof side rail. There has been proposed a vehicle body structure in which an adhesive is fixed to a strength structural member (a similar structure is described in, for example, Japanese Patent Application No. 10-353428).

In this case, at the roof side portion, as shown in FIG. 5, an outer panel 1a and an inner panel 1b are welded and joined to a flange portion 2 of a roof side rail 1 having a closed sectional structure, and a terminal portion of a resin roof panel 3 is provided. 3a is polymerized and fixed with an adhesive 4, and the superposed portion is concealed with a welt 5 to improve the appearance, while the weather strip 7 on the door 6 side is elastically contacted with the welt 5 when the door is closed. To ensure the sealing performance. In addition, 8 is a welding bead.

[0004]

In the conventional structure shown in FIG. 5, the adhesive layer 4 interposed between the flange portion 2 of the roof side rail 1 and the terminal portion 3a of the resin roof panel 3 is regulated. Since there is no means for performing the above operation, the adhesive may protrude due to the variation in the amount of the adhesive 4 applied and hinder the work in the next step, or an extra man-hour is required for a rework such as wiping the adhesive 4. It is not preferable.

When the resin roof panel 3 needs to be detached when repairing it, the resin roof panel 3 can be peeled off from the bonding portion with the roof side rail 1 without using a special tool. Therefore, it is not possible to flexibly cope with a repair work or the like with the resin roof panel 3 removed.

In addition, if the applied amount of the adhesive 4 is partially varied, even the fixing and holding force itself of the resin roof panel 3 is partially varied, and the quality of the entire vehicle is unstable. In addition, as described above, the external force required to peel off the resin roof panel 3 must be adjusted according to the variation, and the workability deteriorates.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has been made uniform by eliminating variations in application or filling of an adhesive when bonding and fixing a resin outer plate such as a resin roof panel. Accordingly, it is an object of the present invention to provide a fixing structure and a fixing method in which various secondary problems based on the variation in the adhesive properties are effectively eliminated.

[0008]

According to the first aspect of the present invention, there is provided a resin outer panel such as a resin roof panel for applying a decoration to a strength structural member serving as a skeleton of a vehicle body while covering the strength structural member. In the structure for bonding and fixing, when the terminal portion of the resin outer plate is superposed on the terminal portion of the strength structural member and bonded, a stepped adhesive surface is formed on the terminal portion of the strength structural member, while the resin is formed. The terminal portion of the outer plate is projected from the terminal portion of the strength structural member by a predetermined amount in the virtual extension direction to form a curved tab, and the inner side surface of the tab that is to be an adhesive surface is located on the back side. A heel portion abutting on the terminal portion on the strength structural member side is formed so as to protrude, and a space surrounded by the inner surface of this tab and the bonding surface of the terminal portion on the strength structure member side is used as an adhesive filling space, and a predetermined adhesive is used. It is characterized by being filled.

The resin outer panel to which the present invention is applied is not necessarily limited to a resin roof panel.

Therefore, according to the first aspect of the present invention, since the heel portion set on the inner surface of the tab is in contact with the terminal portion, which is the bonding surface on the strength structural member side, the heel portion is filled with the adhesive. The effect of regulating the amount is exerted, the amount of adhesive filling in each part can be made uniform, and at least the adhesive is prevented from protruding from the heel part to the vehicle interior side. In addition, the tab can be used as a knob when it is necessary to peel off the resin outer plate, and if an external force is applied to the resin outer plate with the heel as a fulcrum after grasping this tab, The resin outer plate can be easily peeled off from the strength structural member.

The invention described in claim 2 is the first invention.
The strength structural member according to the invention described in (1) is formed as a closed cross-sectional shape by welding the terminal portions of the base material to each other, and a welding bead for the above-described welding connection is formed at the terminal portion of the strength structural member. Is formed so as to form a part of an adhesive surface of the strength structural member, and an adhesive is filled so as to cover the weld bead.

Therefore, according to the second aspect of the present invention, since the infiltration of water into the weld bead can be prevented by the sealing effect of the adhesive, the rust-prone weld bead can be effectively protected by the adhesive. become.

According to a third aspect of the present invention, in the construction of the fixing structure according to any one of the first and second aspects, the tab is externally arranged such that the heel portion comes into contact with the adhesive surface on the strength structural member side. It is characterized in that a filling nozzle is inserted into the adhesive filling space and the adhesive is filled while being pressed against the end portion of the strength structural member.

Therefore, according to the third aspect of the present invention, the fixed amount of the adhesive can be filled or the fixed amount can be applied through the entire bonded portion because of the effect of controlling the applied amount of the adhesive at the heel portion. Alternatively, it contributes to further stabilization and uniformity of coating quality.

[0015]

According to the first aspect of the present invention, the terminal portion of the resin outer plate is projected from the terminal portion of the strength structural member in the virtual extension direction to form a curved tab, and the tab of the tab is formed. A heel portion is formed on the inner surface at the back to abut the end on the strength structural member side, and the space surrounded by the inner surface of the tab and the stepped adhesive surface on the strength structure member is filled with adhesive. Since the space is filled with the adhesive, the effect of regulating the amount of the adhesive filled is exhibited by the heel portion, and the uniformity of the filling amount stabilizes the adhesive strength, and the heel portion is supported after the tab is gripped. If a tensile force is applied, the resin outer plate can be easily peeled off.

Further, according to the second aspect of the present invention, since the weld bead which is the welded part of the strength structural member can be protected by the fixed amount of the adhesive, the same as the first aspect of the present invention. In addition to the effect described above, there is an effect that rust can be reliably prevented from being generated at the welded portion, which is considered to be easily rusted.

Further, according to the third aspect of the present invention,
Inserting a filling nozzle into the adhesive filling space and filling or applying the adhesive while holding down the tab so that the heel part securely contacts the terminal part of the strength structural member which is the mating adhesive surface, so that the adhesive is filled. A fixed amount of filling or a constant amount of coating is possible, and the filling or application quality of the adhesive is made uniform, so that there is an effect that the bonding strength can be stabilized and made uniform.

[0018]

1 and 2 show a preferred embodiment of a fixing structure according to the present invention, in which a resin roof panel is bonded and fixed to a roof side rail 1 as in FIG. Is shown. Parts common to those in the conventional structure shown in FIG. 5 are denoted by the same reference numerals.

As shown in FIG. 1, the roof side rails 1 functioning as strength structural members serving as a skeleton of the vehicle body are disposed on the left and right sides of the roof portion along the vehicle front-rear direction, as is well known. The roof side rail 1 is made up of an outer panel 1a and an inner panel
The flange portions 2, 2 as the respective terminal portions are welded to each other to form a closed cross-sectional shape. A three-dimensional roof panel 13 made of resin is placed on the left and right roof side rails 1 via a positioning member 9 so as to cover the roof side rails 1. The portion is bonded and fixed to the lower flange portion 2 of the roof side rail 1 via an adhesive 14 by overlapping. The overlap between the lower flange portion 2 of the roof side rail 1 and the terminal portion of the roof panel 1 is concealed by fitting a welt 5 having a substantially U-shaped cross section as in the related art.

At the lower end portion of the roof side rail 1, the step portion 10 is formed substantially by making the length of the flange portion 2 on the outer panel 1a shorter than that of the inner panel 1b. The outer panel 1a and the inner panel 1b are integrated to form the roof side rail 1 by performing fillet welding on the stepped portion 10 with the welding bead 8, and at the same time, the stepped portion 10 and the welding bead 8 are formed. A stepped adhesive surface substantially on the side of the roof side rail 1 is formed with the surface.

On the other hand, at the terminal portion of the roof panel 13 which is to be overlapped with the lower terminal portion of the roof side rail 1, the flange portion 2 on the outer panel 1a side in the overlapped state.
An arc-shaped curved tab 11 protruding in the virtual extension direction is formed integrally. An inner surface 12 of the tab 11 which is an adhesive surface with the other side is also curved in an arc shape, and a heel portion 15 which comes into close contact with the flange portion 2 is provided at a deep portion of the inner surface 12. The tab 11 is formed so as to protrude, and the thickness of the tab 11 itself gradually decreases from the heel portion 15 toward the tip of the tab 11.

The space surrounded by the step portion 10 including the surface of the weld bead 8 and the inner surface 12 of the tab 11 as described above is a stepped adhesive filling space 16. By filling the filling space 16 with the structural adhesive 14 without any gap and the bead portion 8 being completely hidden, the roof panel 13 is superposed on the roof side rail 1 and is firmly adhered and fixed.

When the adhesive 14 is filled in the adhesive filling space 16, the tab 11 easily rises from the flange portion 2 of the roof side rail 1 due to the self-elasticity of the roof panel 13 itself. After the roof panel 13 positioned with respect to the roof side rail 1 is restrained by a clamper or the like (not shown), the tab 11 is pressed from the outside by a predetermined pressure roller 17 as shown in FIG. Is firmly adhered to the flange portion 2, and in this state, the adhesive 14 is filled with the adhesive filling nozzle 18 facing the adhesive filling space 16. By doing this,
Due to the effect of restricting the filling amount of the heel portion 15, the adhesive 14 does not protrude into the vehicle interior, the volume of the adhesive filling space 16 is stabilized, and the adhesive 14 is fixedly filled at any position of the bonding site. Will be.

Therefore, according to the present embodiment, the adhesive 14 does not protrude into the vehicle cabin at any position of the bonding portion and the filling amount thereof is constant, so that the bonding strength is stabilized without variation. As a result, the bonding quality can be stabilized, and the force required to peel off the roof panel 13 can be stabilized.

More specifically, when the roof panel 13 is peeled off, the tab 11 is gripped and then the tab 11 is turned up with the heel portion 15 as a fulcrum. As shown in FIG. 5, the length from the tip of the tab 11 to the heel portion 15 as a fulcrum is set as the arm length, and the tab 11 is peeled off by the force F using the leverage principle, thereby providing the characteristic of adhesive bonding. Since the shear force is excellent, but the tensile force is relatively weak, the tab 11 and thus the roof panel 13 can be easily peeled off from the roof side rail 1 with a small force F. Moreover, the tab 11
The thickness of the adhesive layer 14 is set so as to gradually decrease from the heel portion 15 toward the tip, and the thickness of the adhesive layer 14 is set to increase toward the tip of the tab 11. As a result, the roof panel 13 can be easily peeled off by starting to turn the tab 11 with a relatively small force using the portion where the thickness t of the adhesive layer 14 is the largest as the introduction portion.

In particular, since the adhesive 14 is completely filled in the step-like adhesive filling space 16 so as to completely cover the welding bead 8, the welding bead 8 which is easily rusted can be protected by the adhesive 14. , Especially roof side rail 1
In the case where is a plated steel sheet, covering the welded portion where rust is likely to progress with the adhesive 14 can greatly contribute to the improvement of the rust prevention effect. In addition, since the bonding surface is substantially stepped as described above, an improvement in bonding strength can be expected by enlarging the bonding area as compared with conventional simple planar bonding, and particularly as shown in FIG. When a force is applied to peel the roof panel 13 upward, a shearing force is applied to the bonding portion, and the adhesive layer 14 that fills the step-like adhesive filling space 16 against the shearing force acts as an anchor effect. Therefore, the bonding strength is further improved in combination with the expansion of the bonding area.

[Brief description of the drawings]

FIG. 1 is a diagram showing a preferred embodiment of a fixing structure according to the present invention, and is an enlarged sectional view of a portion corresponding to a part a in FIG.

FIG. 2 is an explanatory view at the time of construction of the fixing structure of FIG. 1;

FIG. 3 is a functional explanatory view of the structure shown in FIG. 1;

FIG. 4 is a functional explanatory view of the structure shown in FIG. 1;

5A and 5B are views showing an example of a conventional fixing structure, in which FIG. 5A is a perspective view of the entire vehicle body, and FIG. 5B is an enlarged sectional view of a part a in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Roof side rail (strength structural member) 1a ... Outer panel 1b ... Inner panel 2 ... Flange part 8 ... Weld bead 10 ... Stepped part 11 ... Tab 12 ... Inner surface 13 ... Roof panel (resin outer plate) 14 ... Adhesive 15: Heel part 16: Adhesive filling space 17: Pressure roller 18: Adhesive filling nozzle

Continuing on the front page (72) Inventor Masaki Kondo Nissan Motor Co., Ltd., 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa Prefecture (72) Inventor Takashi Matsuoka 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa Prefecture F-term in Nissan Motor Co., Ltd. 3D003 AA03 BB01 CA38 CA40 DA27

Claims (3)

[Claims] 1. A structure for bonding and fixing a resin outer plate for providing decoration while covering the strength structural member serving as a skeleton of a vehicle body, wherein the terminal portion of the resin outer plate is a strength structure. In superimposing and bonding to the terminal portion of the member, a stepped bonding surface is formed at the terminal portion of the strength structural member, while the terminal portion of the resin outer plate is virtually extended more than the terminal portion of the strength structural member. Along with forming a curved tab by projecting by a predetermined amount in the direction, a heel portion projecting from the inner surface of the tab that is to be an adhesive surface is formed on the inner side of the inner surface to be in contact with a terminal portion of the strength structural member side, A resin outer plate fixing structure for an automobile body, wherein a predetermined adhesive is filled in a space surrounded by an inner surface of the tab and an adhesive surface on the side of the strength structural member as an adhesive filling space. 2. The strength structural member has a closed cross-sectional shape formed by welding and joining ends of a base material to each other. 2. The vehicle body according to claim 1, wherein a bead is formed so as to form a part of an adhesive surface on the strength structural member side, and an adhesive is filled so as to cover the weld bead. The fixing structure of the resin outer plate. 3. The fixing structure according to claim 1, wherein the tab is pressed from the outside to a terminal portion of the strength structural member so that the heel portion is in contact with the adhesive surface on the strength structure member side. A method for fixing a resin outer plate in an automobile body, wherein a filling nozzle is inserted into the adhesive filling space to fill the adhesive.