JP2002067694A - Door frame and manufacturing method thereof - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To form a door frame without skill. An end portion of a main frame and a pillar portion are provided.
4 and the end of the main frame 12 is filled with an adhesive 20.
And the end of the pillar portion 14 were connected to form the door frame 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door frame for a sash door of an automobile and a method for manufacturing the same.

[0002]

2. Description of the Related Art Automobile doors are roughly classified into three types: panel doors, sash doors and sashless doors. The sash door is formed by separately forming a door body portion located on the lower side and a door frame portion located on the upper side and defining an opening which is opened and closed by a window glass, and the two are integrated by welding or the like. It is.

[0003] In the door frame, the end of the main frame and the end of the pillar are abutted, and the abutted portion is joined by overlaying welding. Thereafter, the portion constituting the design surface and the design surface are formed. A part of the part other than the part constituting was polished.

However, the polishing of the design surface has been divided into two stages. In other words, polishing using a coarse-grained sander with a large amount of polishing in order to sharpen the built-up part inevitable during welding, and polishing with a fine-grained sander in order to obtain a smooth surface after coating is applied And two stages.

[0005]

However, polishing using a coarse-grained sander has the advantage of a high polishing speed, but requires a high level of skill, resulting in an increase in man-hours. Was. That is, the steel plate used for the door frame has a thickness of about 0.8 mm, and if it is cut too much, the appearance becomes poor (concave or the like) after painting and becomes apparent.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a door frame which does not cause such problems and does not require any skill, and a method for manufacturing the same.

[0007]

According to the first aspect of the present invention, there is provided a technical solution for solving the above-mentioned technical problem, wherein "an end of a main frame and an end of a pillar are joined. A door comprising a first step, a second step of filling the abutted portion with an adhesive in an overlaid manner, a third step of curing the adhesive, and a fourth step of polishing the overlaid adhesive. Frame manufacturing method ".

[0008] As specified in claim 2, the adhesive of claim 1 is preferably one which is compatible with the paint used for painting the main frame and the pillar portion. Preferably, the adhesive is an epoxy resin-based adhesive.

Further, as specified in claim 4, it is preferable that a fifth step of reinforcing the non-designed portion of the main frame and the pillar portion is provided next to the first step of claim 1.

[0010] In addition, as described in claim 5, the present invention is characterized in that the end of the main frame and the end of the pillar portion are abutted, and an adhesive is filled in the abutted portion, whereby the main frame is formed. A door frame provided by connecting an end portion and an end portion of the pillar portion.

[0011]

In the manufacturing method according to the first aspect of the present invention, not the polishing of the welded portion as in the prior art, but the polishing of the build-up portion of the adhesive, and the polishing rates of the adhesive and the metal are different. Therefore, it can be performed without skill.

According to the second aspect of the present invention, by using an adhesive which is compatible with the paint used for coating the main frame and the pillar portion, it is possible to provide the adhesive according to the third aspect. As clearly stated, the quality can be improved by employing the epoxy resin adhesive.

Further, as specified in claim 4, the method for manufacturing a door frame according to claim 1 further includes a fifth step of reinforcing the non-designed portion of the main frame and the pillar portion by adding a fifth step. It is possible to provide a door frame with improved strength.

In addition, the door frame defined in claim 5 can be obtained without requiring any skilled work.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific example of a method for manufacturing a door frame according to the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 1, the door frame 10
As is well known, the main frame 12 and the pillar portion 14
And a glass guide 16.

The door frame 10 excluding the glass guide 16 is formed through the following steps.

As shown in FIGS. 2 and 3, the end of the main frame 12 prepared as a single unit and the end of the pillar unit 14 prepared as a single unit abut against each other using a jig (not shown). Are positioned so as to have a predetermined appearance. Then, welding is performed on the butted portion. A gap 19 is formed above the weld 17.

As shown in FIGS. 4 and 5, the gap 19 is filled with an adhesive 20 in a built-up manner. As the adhesive 20 to be filled, an adhesive compatible with a paint (cation) applied in a later coating step, for example, an epoxy resin adhesive is used.

After the filling of the adhesive 20 is completed, the adhesive 20 is hardened by standing at room temperature (or heat treatment).

Thereafter, the overlay portion of the adhesive 20 is polished to form the door frame 10 having the structure shown in FIGS. 6, 7 and 8. First of all, polishing for removing the adhesive 20 is performed. However, this polishing differs from polishing of the build-up portion of the welded portion, that is, metal polishing, and therefore requires a high level of skill because the polishing amount is different. Therefore, there is a great effect in practical use.

Thereafter, the design surface 10a of the door frame 10 is polished and transferred to the cationic electrodeposition coating process.

Although the embodiments of the present invention have been described above, the present invention is not intended to be limited to the above-described embodiments.
Any door frame may be used as long as it conforms to the spirit of the present invention.

[Brief description of the drawings]

FIG. 1 is a side view of a door frame according to a specific example of the present invention.

FIG. 2 is a diagram showing a state in which an end of a main frame and an end of a pillar are abutted in a first step.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a plan view showing a state where an adhesive is filled in an overlaid manner at a butt portion between a main frame end and a pillar end in a second step.

FIG. 5 is a sectional view taken along line BB of FIG. 4;

FIG. 6 is a view showing a state after polishing of a build-up portion of an adhesive at an abutting portion between an end portion of a main frame and an end portion of a pillar portion in a fourth step.

FIG. 7 is a sectional view taken along line CC of FIG. 6;

FIG. 8 is a view of the state of FIG. 6 viewed from an oblique direction.

[Explanation of symbols]

 10: Door frame 12: Main frame 14: Pillar section 20: Adhesive

Claims (5)

[Claims] 1. A first step in which an end of a main frame and an end of a pillar are abutted, a second step in which the abutted portion is filled with an adhesive in an overlaid manner, and a third step in which the adhesive is cured. A method of manufacturing a door frame, comprising a step and a fourth step of polishing the overlaid adhesive. 2. The method for manufacturing a door frame according to claim 1, wherein the adhesive is an adhesive that is compatible with a paint used for painting the main frame and the pillar portion. 3. The method according to claim 2, wherein the adhesive is an epoxy resin-based adhesive. 4. The method for manufacturing a door frame according to claim 1, further comprising a fifth step following the first step of reinforcing the non-designed portion of the main frame and the pillar portion. 5. An end of the main frame and an end of the pillar portion are abutted, and the abutted portion is filled with an adhesive to connect the end of the main frame and the end of the pillar portion. A door frame.