JP7016239B2 - Vehicle door sash - Google Patents

Description

The present invention relates to a vehicle door sash.

Conventionally, there is a door sash in which a portion to be welded in which a plurality of metal plates are overlapped is joined by seam welding. In this door sash, the portions to be welded are joined by continuous seam welding along the longitudinal direction (for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2013-18409

However, when continuous seam welding is performed, welding heat is accumulated in the portion to be welded, so that the size of the door sash may vary due to the strain caused by the welding heat.

Therefore, one of the problems of the present invention is, for example, to obtain a vehicle door sash having a novel configuration capable of reducing strain due to welding heat.

The vehicle door sash of the present invention has, for example, a tubular portion located inside the vehicle, a design portion located outside the tubular portion and extending along the longitudinal direction of the tubular portion, and the tubular portion. The tubular portion and the design portion are provided with a tubular portion and a connecting portion extending along the longitudinal direction of the tubular portion while connecting the portion and the design portion in the lateral direction intersecting the longitudinal direction. , And the connecting portion is bent at a plurality of linear bent portions along the longitudinal direction between the first end portion and the second end portion in the lateral direction extending along the longitudinal direction. It is configured by being connected by a sheet of metal plates, and the connecting portion is an intermediate portion of the metal plate bridged between the tubular portion and the design portion, and the thickness direction of the intermediate portion and the metal plate. The first end portion welded at a plurality of first welding points arranged at intervals in the longitudinal direction from the intermediate portion, and the intermediate portion overlaps with the intermediate portion in the thickness direction, and the intermediate portion and the said portion. A coating film comprising a second end portion welded at a plurality of second welding points arranged at intervals in the longitudinal direction and facing the first end portion with a gap, and covering the gap , said. The thickness of the portion of the coating film provided in the gap is larger than the plate thickness of the first end portion and the plate thickness of the second end portion, and the length of the gap along the lateral direction is , The plate thickness of the first end portion and the plate thickness of the second end portion, and the coating film is obtained by performing an intermediate coating and a top coating after electrodeposition coating, or is obtained only by electrodeposition coating. Will be.

The plurality of first welding points and the plurality of second welding points are alternately arranged along the longitudinal direction.

In the vehicle door sash of the present invention, for example, a plurality of wall portions of a metal plate are welded at a plurality of first welding points and second welding points arranged at intervals in a connecting portion. Therefore, the strain due to the welding heat is reduced as compared with the conventional door sash in which the welded portions are connected in a strip shape along the longitudinal direction. Further, the gap between the first end portion and the second end portion is covered with the coating film. Therefore, the progress of corrosion such as rust at the first end portion and the second end portion is suppressed.

FIG. 1 is a side view of the vehicle of the embodiment as viewed from the side. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1, and the coating film of the upper sash is omitted. FIG. 3 is a cross-sectional view of the upper sash in which the weather strip and the glass run are omitted from FIG. 2, and shows the coating film of the upper sash. FIG. 4A is an enlarged cross-sectional view of A in FIG. FIG. 4B is an enlarged cross-sectional view of FIG. 4A, and the coating film is omitted. FIG. 5 is a perspective view of the upper sash of FIG. 3, and the coating film is omitted. FIG. 6 is a plan view of the upper sash when FIG. 5 is viewed from above. FIG. 7 is a schematic and exemplary diagram showing a seam welding line according to an embodiment. FIG. 8 is a schematic and exemplary view showing a state in which the connecting portion of the upper sash is seam welded. FIG. 9 is a perspective view showing the first roller electrode of FIG. FIG. 10 is a perspective view showing the second roller electrode of FIG. FIG. 11 is a plan view of the upper sash according to a modified example.

Hereinafter, exemplary embodiments of the present invention will be disclosed. The configurations of the embodiments shown below, as well as the actions and results (effects) brought about by the configurations, are examples. The present invention can also be realized by configurations other than those disclosed in the following embodiments. Further, according to the present invention, it is possible to obtain at least one of various effects (including derivative effects) obtained by the configuration.

The directions are shown in each figure for convenience. FR is the front in the front-rear direction of the vehicle, RR is the rear in the front-rear direction of the vehicle, UPR is the upper part in the vertical direction of the vehicle, LWR is the lower part in the vertical direction of the vehicle, OUT is the outside of the vehicle (outside in the width direction of the vehicle), IN is the inside of the vehicle. The direction (inside in the vehicle width direction) is shown.

FIG. 1 is a side view of the vehicle of the present embodiment as viewed from the side. As shown in FIG. 1, in the left side portion of the vehicle 1, the front door 2 is provided in front and the rear door 3 is provided in the rear side of the front door 2. The rear door 3 has a door panel 4 provided on the lower side, a door frame 5 provided on the upper side of the door panel 4, and a door glass 6 held by the door panel 4 and capable of vertical movement.

The door frame 5 includes a front side sash 7 extending upward from the front end at the upper end of the door panel 4, a rear side sash 8 extending upward from the rear end at the upper end of the door panel 4, and a front side sash 7 and a rear side sash 8. It has an upper sash 9 that connects the upper ends to each other in the front-rear direction of the vehicle.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1, and the coating film 13 is omitted. FIG. 3 is a cross-sectional view of the upper sash 9 in which the weather strip and the glass run 11 are omitted from FIG. 2, and shows the coating film 13.

As shown in FIG. 2, a weather strip 10 extending in the vehicle front-rear direction is held on the upper side of the upper sash 9, and a glass run 11 extending in the vehicle front-rear direction is held on the lower side of the upper sash 9. Has been done. The weatherstrip 10 is made of an elastic member, for example rubber. An inner protrusion 10a projects toward the inside of the vehicle toward the inside of the vehicle (inside in the vehicle width direction) at the lower part of the weatherstrip 10, and the outside of the vehicle (inward in the vehicle width direction) at the bottom of the weatherstrip 10. The outer protrusion 10b is projected toward the outside of the vehicle (on the outer side of the vehicle). The inner protrusion 10a of the weather strip 10 is held by the inner holding portion 9g of the upper sash 9 described later, and the outer protrusion 10b of the weather strip 10 is held by the outer holding portion 9i of the upper sash 9 described later. Has been done. Further, a bulging portion 10c extending toward the upper side of the vehicle is provided on the inner side of the vehicle (inward side in the vehicle width direction) in the upper part of the weather strip 10, and the outer side of the vehicle (vehicle) in the upper part of the weather strip 10. On the outer side in the width direction), a projecting piece 10d extending upward of the vehicle is provided. When the rear door 3 is closed, the bulging portion 10c and the projecting piece 10d are pressed against the vehicle body panel to maintain the liquidtightness between the rear door 3 and the vehicle body panel.

Further, the glass run 11 includes a base portion 11a provided on the upper portion, an inner leg portion 11b extending downward from the vehicle inner side of the base portion 11a, and an outer leg portion extending downward from the vehicle outer side of the base portion 11a. It has 11c and a pair of lips 11d and 11e provided at the lower ends of the inner leg 11b and the outer leg 11c. The tips of the pair of lips 11d and 11e abut on the front surface and the back surface of the door glass 6 to maintain the liquidtightness between the door glass 6 and the upper sash 9. The glass run 11 is held by the inner holding portion 9f and the outer holding portion 9h of the upper sash 9, which will be described later.

As shown in FIGS. 2 and 3, the upper sash 9 includes a tubular portion 9a, a design portion 9b, and a connecting portion 9c. The tubular portion 9a, the design portion 9b, and the connecting portion 9c are a plurality of portions along the vehicle front-rear direction between the first end portion 9d and the second end portion 9e in the vehicle width direction extending along the vehicle front-rear direction. It is configured by being connected by a single metal plate bent by a linear bent portion 12. Hereinafter, a specific description will be given.

The tubular portion 9a is located inside the vehicle (inward side in the vehicle width direction), is a closed cross-sectional portion constituting the hollow portion, and extends along the vehicle front-rear direction. A concave portion recessed toward the outer side of the vehicle is provided on the upper portion of the tubular portion 9a on the outer side of the vehicle (outer side in the vehicle width direction), and the recess is configured as an inner holding portion 9f for holding the glass run 11. Has been done. Further, an inner holding portion 9g for holding the weather strip 10 is provided on the upper portion of the inner side of the tubular portion 9a. The tubular portion 9a is formed by bending a metal plate at a plurality of linear bent portions 12. The vehicle front-rear direction is an example of the longitudinal direction. The vehicle width direction is an example of the lateral direction.

The design portion 9b is located at a distance from the tubular portion 9a on the outside of the vehicle and extends along the vehicle front-rear direction. The design portion 9b has a double-layered structure consisting of a metal plate inside the car and a metal plate outside the car. The surface of the metal plate on the outer side of the vehicle on the outer side of the vehicle is the design surface 9k. The metal plate inside the vehicle at the lower part of the design portion 9b is provided with an outer holding portion 9h, and the metal plate inside the vehicle at the upper part of the design portion 9b is provided with an outer holding portion 9i. The design portion 9b is configured by being bent by a plurality of linear bent portions 12.

As shown in FIG. 3, the connecting portion 9c connects the tubular portion 9a and the design portion 9b in the vehicle width direction intersecting the vehicle front-rear direction and extends along the vehicle front-rear direction. The connecting portion 9c is configured such that a metal plate arranged on the lower side and a metal plate arranged on the upper side are overlapped with each other. Here, as described above, the upper sash 9 is composed of a single metal plate bent at a plurality of bent portions 12 between the first end portion 9d and the second end portion 9e in the vehicle width direction. There is. Therefore, in the connecting portion 9c, the metal plate arranged on the lower side is the intermediate portion 9j of the metal plate bridged between the tubular portion 9a and the design portion 9b, and the metal plate arranged on the upper side is. , The first end portion 9d which overlaps the intermediate portion 9j in the thickness direction of the metal plate and is welded to the intermediate portion 9j, and the first end portion 9d which overlaps the intermediate portion 9j in the thickness direction and is welded to the intermediate portion 9j. Includes a second end 9e, which faces with a gap 14. Further, as shown in FIG. 4, the gap 14 is covered with the coating film 13. Hereinafter, it will be described in detail with reference to FIG.

FIG. 4A is an enlarged cross-sectional view of A in FIG. FIG. 4B is an enlarged cross-sectional view of FIG. 4A, and the coating film 13 is omitted. As shown in FIGS. 4A and 4B, the tip of the first end portion 9d is the first end edge 9d1 and the tip of the second end portion 9e is the second end edge 9e1. The surface of the first end portion 9d is the first surface portion 9d2, and the surface of the second end portion 9e is the second surface portion 9e2. In the embodiment, the coating film 13 covers the entire gap 14. Further, the coating film 13 covers the first surface portion 9d2 of the first end portion 9d and the second surface portion 9e2 of the second end portion 9e. The first end edge 9d1 and the second end edge 9e1 face each other apart from each other in the vehicle width direction, and a gap 14 is provided between the first end edge 9d1 and the second end edge 9e1. Specifically, as shown in FIG. 4B, the gap 14 is an inner side surface 14a which is the first end edge 9d1, an outer side surface 14b which is the second end edge 9e1, and an upper surface 9j1 of the intermediate portion 9j. It is configured to have a rectangular cross section surrounded by a bottom surface 14c and a top surface 14d connecting the first surface portion 9d2 and the second surface portion 9e2. Further, the length of the gap 14 along the vehicle width direction (shortward direction) is L, and the height of the gap 14 is H. The length L is the separation distance between the first end edge 9d1 and the second end edge 9e1 along the vehicle width direction. The height H is equivalent to the plate thickness t1 of the first end portion 9d and the plate thickness t2 of the second end portion 9e. That is, the height H of the gap 14, the plate thickness t1 of the first end portion 9d, and the plate thickness t2 of the second end portion 9e are all the same dimensions.

As shown in FIG. 4A, the thickness T0 of the portion of the coating film 13 provided in the gap 14 is larger than the plate thickness t1 of the first end portion 9d and the plate thickness t2 of the second end portion 9e. That is, expressed by a mathematical formula, T0> t1 and T0> t2 have a magnitude relationship. Further, the thickness T0 of the coating film 13 in the gap 14 is the thickness obtained by adding the plate thickness t1 of the first end portion 9d and the thickness T1 of the coating film of the first surface portion 9d2 of the first end portion 9d. Become. On the other hand, the thickness T0 of the coating film 13 in the gap 14 is the sum of the plate thickness t2 of the second end portion 9e and the thickness T2 of the coating film 13 of the second surface portion 9e2 of the second end portion 9e. It becomes. Further, the length L of the gap 14 along the vehicle width direction (shortward direction) is equal to or less than the plate thickness t1 of the first end portion 9d and the plate thickness t2 of the second end portion 9e. That is, when expressed by a mathematical formula, there is a magnitude relationship of L ≦ t1 and L ≦ t2. The coating film 13 includes various coating films such as a coating film obtained by performing an intermediate coating and a top coating after electrodeposition coating, and a coating film obtained only by electrodeposition coating. In the present embodiment, the plate thicknesses t1 and t2 of the first end portion 9d and the second end portion 9e are, for example, 0.7 mm. The dimension of the gap 14 is less than or equal to the plate thickness, for example, 0.7 mm or less.

FIG. 5 is a perspective view of the upper sash 9 of FIG. 3, and the coating film 13 is omitted. FIG. 6 is a plan view of the upper sash 9 when FIG. 5 is viewed from above.
As shown in FIGS. 5 and 6, the intermediate portion 9j and the first end portion 9d are welded at a plurality of first welding points W1 arranged at intervals in the vehicle front-rear direction. In the present embodiment, the first welding points W1 scattered in the front-rear direction of the vehicle are arranged at equal intervals. Further, the intermediate portion 9j and the second end portion 9e are welded at a plurality of second welding points W2 arranged at intervals in the front-rear direction of the vehicle. In the present embodiment, the second welding points W2 scattered in the front-rear direction of the vehicle are arranged at equal intervals. The plurality of first welding points W1 and the plurality of second welding points W2 are alternately arranged along the vehicle front-rear direction. That is, when viewed in the vehicle front-rear direction, the second welding point W2 is arranged between the first welding points W1 adjacent to each other in the vehicle front-rear direction.

Next, the structure of the seam welding device 400 for seam welding the upper sash 9 and the procedure for seam welding will be briefly described.

FIG. 7 is a schematic and exemplary view showing the seam welding line 100. FIG. 8 is a schematic and exemplary view showing a state in which the connecting portion 9c of the upper sash 9 is seam welded. FIG. 9 is a perspective view showing the first roller electrode 415 of FIG. FIG. 10 is a perspective view showing the second roller electrode 416 of FIG.

First, as shown in FIG. 7, the seam welding line 100 includes a coil 200 around which a long metal plate 201 is wound, a roll forming device 300 that bends a plurality of metal plates 201 sent from the coil 200, and a roll. The seam welding device 400 that performs seam welding to the connecting portion 9c (welded portion) of the upper sash 9 obtained by bending with the molding device 300, and the deformation and strain of the upper sash 9 generated by the welding heat during seam welding. It is provided with a bending device 500 for straightening. The roll forming apparatus 300 is provided with a plurality of upper roll molds 301 and a plurality of lower roll molds 302 provided on the lower side of the upper roll mold 301.

Further, as shown in FIGS. 8 to 10, the seam welding apparatus 400 used for seam welding includes a first roller electrode 415 arranged on the upper side and a second roller electrode 416 arranged on the lower side. As shown in FIG. 9, the first roller electrode 415 is from the first row R1 and the first row R1 of a plurality of first convex portions 415a arranged at intervals in the circumferential direction around the first rotation center C1. A plurality of second convex portions 415b located offset to one axial direction of the first rotation center C1 (in the present embodiment, to the right in FIG. 9) and arranged at intervals in the circumferential direction around the first rotation center C1. It has a second row R2 and. The first convex portion 415a and the second convex portion 415b are alternately arranged along the circumferential direction. The first convex portion 415a and the second convex portion 415b come into contact with the welded portion during seam welding. A circular central through hole 415c is provided in the radial center portion of the first roller electrode 415. A central through hole 415c is inserted and held in a drive shaft (not shown), and the first roller electrode 415 rotates about the first rotation center C1 by rotating the drive shaft.

As shown in FIG. 10, the second roller electrode 416 is first opposed to the first opposed row R10 of a plurality of first opposed convex portions 416a arranged at intervals in the circumferential direction around the second rotation center C2. A plurality of second units located offset from the row R10 in the axial direction of the second rotation center C2 (in the present embodiment, to the right in FIG. 10) and arranged at intervals in the circumferential direction around the second rotation center C2. It has a second facing row R20 of the facing convex portion 416b. The first opposed convex portions 416a and the second opposed convex portions 416b are arranged alternately along the circumferential direction. The first opposed convex portion 416a and the second opposed convex portion 416b come into contact with the welded portion during seam welding. A circular central through hole 416c is provided in the radial center portion of the second roller electrode 416. A central through hole 416c is inserted and held in a drive shaft (not shown), and by rotating the drive shaft, the second roller electrode 416 rotates about the second rotation center C2 in conjunction with the first roller electrode 415. .. The first rotation center C1 and the second rotation center C2 are arranged in parallel.

Further, each of the first opposed convex portions 416a is configured to face the first convex portion 415a when the second roller electrode 416 rotates in conjunction with the first roller electrode 415. Each of the second opposed convex portions 416b is configured to face the second convex portion 415b when the second roller electrode 416 rotates in conjunction with the first roller electrode 415.

As shown in FIGS. 8 to 10, first, in the first roller electrode 415 and the second roller electrode 416, one of the plurality of first convex portions 415a facing each other and the plurality of first opposed convex portions 416a. A connecting portion 9c (welded portion) including a plurality of overlapped metal plates among the portions of the upper sash 9 (vehicle door sash) is sandwiched by one of the above parts. In this state, seam welding is performed by energizing between the first roller electrode 415 and the second roller electrode 416. By this seam welding, the first welded portion P1 shown in FIG. 6 is provided. (First step)

Next, the first roller electrode 415 and the second roller electrode 416 are further rotated in conjunction with each other to form one of the plurality of second convex portions 415b facing each other and one of the plurality of second opposed convex portions 416b. The connecting portion 9c is sandwiched between the two. In this state, seam welding is performed by energizing between the first roller electrode 415 and the second roller electrode 416. By this seam welding, the second welded portion P2 shown in FIG. 6 is provided. (Third step)

Then, the first roller electrode 415 and the second roller electrode 416 are further rotated in an interlocking manner, and one of the other one of the plurality of first convex portions 415a facing each other and one of the plurality of first opposed convex portions 416a. The connecting portion 9c is sandwiched between the electrodes. In this state, seam welding is performed by energizing between the first roller electrode 415 and the second roller electrode 416. By this seam welding, the third welded portion P3 shown in FIG. 6 is provided. (Second step)

Further, the first roller electrode 415 and the second roller electrode 416 are further rotated in conjunction with each other, and the first roller electrode 415 and the second roller electrode 416 are further rotated by one of the plurality of second convex portions 415b facing each other and one of the plurality of second opposed convex portions 416b. The connecting portion 9c is sandwiched. In this state, seam welding is performed by energizing between the first roller electrode 415 and the second roller electrode 416. By this seam welding, the fourth weld P4 shown in FIG. 6 is provided. (4th step)

Further, when the first roller electrode 415 and the second roller electrode 416 are further rotated in conjunction with each other, one of the plurality of first convex portions 415a facing each other and the plurality of first ones as in the first step described above. Seam welding is performed on the connecting portion 9c by one of the opposed convex portions 416a. By this seam welding, the fifth weld P5 shown in FIG. 6 is provided. In this way, by further rotating the first roller electrode 415 and the second roller electrode 416 in conjunction with each other, the fifth welded portion P5, the sixth welded portion P6, and the seventh welded portion P7 shown in FIG. Like the eighth welded portion P8, a plurality of welded portions alternately arranged on the left and right are continuously provided. The plurality of first welding points W1 described later are the first welding portion P1, the third welding portion P3, the fifth welding portion P5, the seventh welding portion P7, and a plurality of welding portions following the first welding portion P1. Includes. The plurality of second welding points W2, which will be described later, include a second welding portion P2, a fourth welding portion P4, a sixth welding portion P6, an eighth welding portion P8, and a plurality of welding portions following the second welding portion P2. Welding.

Further, as shown in FIG. 8, when the first roller electrode 415 and the second roller electrode 416 are rotated in the arrow direction, the upper sash 9 moves in the P direction. Further, in seam welding, the metal plate is melted by the electric resistance heat (Joule heat) generated in the connecting portion 9c on which the metal plates are overlapped, and the molten portion is solidified by cooling, so that the two metal plates in the connecting portion 9c are formed. It is a welding method in which they are joined together.

As described above, in the present embodiment, for example, as shown in FIG. 4, a gap 14 is provided between the first end portion 9d and the second end portion 9e, and the gap 14 is covered with the coating film 13. It has been. Therefore, according to the present embodiment, for example, the progress of corrosion such as rust at the first end portion 9d and the second end portion 9e is suppressed. That is, since the first end edge 9d1 of the first end portion 9d and the second end edge 9e1 of the second end portion 9e are separated from each other, the first end portion 9d and the second end portion 9e are connected to each other. The first end edge 9d1 and the second end edge 9e1 are more likely to corrode. Therefore, by covering the first end portion 9d and the second end portion 9e including the first end edge 9d1 and the second end edge 9e1 with the coating film 13, the first end portion 9d and the second end portion 9e are corroded. Progression is suppressed. Although the coating film 13 is provided on the connecting portion 9c in FIG. 3, the coating film 13 may be provided on the entire surface of the upper sash 9.

Further, for example, as shown in FIG. 4A, in the present embodiment, the thickness T0 of the portion of the coating film 13 provided in the gap 14 is the plate thickness t1 of the first end portion 9d and the second end portion 9e. It is larger than the plate thickness t2. That is, the coating film 13 fills the entire gap 14 and covers the entire gap 14. Therefore, the progress of corrosion of the first end portion 9d and the second end portion 9e is further suppressed.

Further, for example, as shown in FIGS. 4A and 4B, the length L of the gap 14 along the vehicle width direction (shortward direction) is the plate thickness t1 of the first end portion 9d and the second end portion 9e. The plate thickness is t2 or less. Therefore, when the paint is filled inside the gap 14, the entire gap 14 can be filled with a small amount of paint.

Further, in the present embodiment, for example, as shown in FIG. 8, a first roller electrode having a plurality of first convex portions 415a and second convex portions 415b spaced in the circumferential direction around the first rotation center C1. The connecting portion 9c of the upper sash 9 is formed by 415 and a second roller electrode 416 having a plurality of first facing convex portions 416a and second facing convex portions 416b spaced in the circumferential direction around the second rotation center C2. Seam welding is performed by energizing while sandwiching (the part to be welded) and rotating. Therefore, in the upper sash 9 of the present invention, a plurality of welded portions are arranged at intervals along the longitudinal direction. Therefore, the door sash of the present invention has less strain due to welding heat than the conventional door sash in which the welded portions are connected in a strip shape along the longitudinal direction.

Further, as shown in FIGS. 9 and 10, the first convex portion 415a and the second convex portion 415b in the first roller electrode 415 are alternately positioned along the circumferential direction, and the first opposed convex portion in the second roller electrode 416. The portions 416a and the second opposed convex portions 416b are alternately positioned along the circumferential direction. Therefore, as shown in FIGS. 5 and 6, the plurality of first welding points W1 and the plurality of second welding points W2 are alternately arranged along the vehicle front-rear direction (longitudinal direction). Therefore, when viewed in a cross section in the vehicle width direction, the joint strength of the connecting portion 9c is made uniform at each portion in the vehicle front-rear direction. Therefore, the overall strength of the upper sash 9 is improved as compared with the case where the first welding point W1 and the second welding point W2 are aligned in the vehicle width direction. Further, since the first welding point W1 and the second welding point W2 are arranged at equal intervals along the vehicle front-rear direction, the strain generated when the first end portion 9d is welded and the second end portion 9e are welded. The strain generated at the time of processing cancels each other alternately, and the strain due to welding heat is further reduced in the entire upper sash 9.

Although the embodiments of the present invention have been illustrated above, the embodiments are merely examples and are not intended to limit the scope of the invention. The present invention can be implemented in various other forms, and various omissions, replacements, combinations, and modifications can be made without departing from the gist of the invention. These various forms and modified forms are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof. In addition, specifications such as each configuration and shape (structure, type, direction, shape, size, length, width, thickness, height, number, arrangement, position, material, etc.) are changed as appropriate. can do.

For example, in the present embodiment described above, both the first welding point W1 and the second welding point W2 have a circular shape. However, as shown in FIG. 11, the first welding point W101 and the second welding point W102 may have a rectangular shape or an elliptical shape extending elongated along the vehicle front-rear direction, for example. In the case of this modification, the circumferential lengths of the first convex portion and the second convex portion of the roller electrode are longer than the circumferential lengths of the first convex portion 415a and the second convex portion 415b shown in FIG.

Further, in the present embodiment, the upper sash 9 of the rear door 3 is provided with the gap 14 and the coating film 13 covering the gap 14, but the coating film 13 is not limited to the upper sash 9 of the rear door 3, and the front side sash 7 and the rear side sash 8 are provided. The gap 14 and the coating film 13 may be provided in the space. Further, the sash of the front door 2 is not limited to the rear door 3, and the gap 14 and the coating film 13 may be provided.

9a ... Cylindrical part, 9b ... Design part, 9c ... Connecting part, 9d ... First end part, 9e ... Second end part, 9j ... Intermediate part, 12 ... Bent part, 13 ... Coating film, W1, W101 ... First welding point, W2, W102 ... Second welding point.

Claims (2)

The tubular part located inside the car and
A design portion located outside the vehicle from the tubular portion and extending along the longitudinal direction of the tubular portion.
The tubular portion and the design portion are connected in the lateral direction intersecting the longitudinal direction, and the tubular portion and the connecting portion extending along the longitudinal direction of the design portion are connected to each other.
Equipped with
The tubular portion, the design portion, and the connecting portion have a plurality of linear shapes along the longitudinal direction between the first end portion and the second end portion in the lateral direction extending along the longitudinal direction. It is composed of a single metal plate that is bent at the bent part of the
The connecting portion overlaps the intermediate portion of the metal plate bridged between the tubular portion and the design portion in the thickness direction of the intermediate portion and the metal plate, and the intermediate portion and the longitudinal direction. The first end portion welded at a plurality of first welding points arranged at intervals overlaps the intermediate portion in the thickness direction, and is arranged at intervals between the intermediate portion and the longitudinal direction. Includes the second end, which is welded at a plurality of second welding points and faces the first end with a gap.
A coating film covering the gap is provided , and the coating film is provided.
The thickness of the portion of the coating film provided in the gap is larger than the plate thickness of the first end portion and the plate thickness of the second end portion.
The length of the gap along the lateral direction is equal to or less than the plate thickness of the first end portion and the plate thickness of the second end portion.
The coating film is a vehicle door sash obtained by performing an intermediate coating and a top coating after electrodeposition coating, or obtained only by electrodeposition coating . The vehicle door sash according to claim 1, wherein the plurality of first welding points and the plurality of second welding points are alternately arranged along the longitudinal direction.

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