WO2014054695A1

WO2014054695A1 - Vehicle door frame

Info

Publication number: WO2014054695A1
Application number: PCT/JP2013/076828
Authority: WO
Inventors: 成信大澤; 謙二清水; 二郎吉原; 祐次夏目
Original assignee: シロキ工業株式会社
Priority date: 2012-10-05
Filing date: 2013-10-02
Publication date: 2014-04-10
Also published as: JP6110624B2; JP2014073784A

Abstract

For a vehicle door frame that has a door sash that forms a window opening and a beltline reinforcement that is extended along a beltline, a beltline reinforcement is constructed by fixing a first molded member, which is formed by means of extrusion-molding of a light metal, and a second molded member, which is formed by means of press-molding of a metal material, with the members being put together face-to-face in the thickness direction of the door in order to ensure the flexibility of the beltline reinforcement and the rigidity and strength thereof at the same time.

Description

Vehicle door frame

The present invention relates to a vehicle door frame, and more particularly to a vehicle door frame having a belt line reinforcement disposed along a belt line of a door.

In order to ensure the strength of the side door of the vehicle, a beltline reinforcement that constitutes a door frame together with the door sash is disposed inside the door in the region along the beltline. In many cases, the beltline reinforcement has a hollow closed cross-sectional portion in order to increase the rigidity and strength while suppressing the weight. There are known a type that is joined together and a type that is formed as a single member of an integral structure as in Patent Document 2.

JP 2002-347440 A JP 2008-239000 A

The integrated structure is advantageous in terms of securing rigidity and strength of the beltline reinforcement alone, but the integrated structure has a problem that the degree of freedom of shape is easily restricted. For example, since the belt-line reinforcement of the integral structure type has a basically uniform cross-sectional shape, if there is a part that overlaps with the belt-line reinforcement in the door body, the belt-line reinforcement is arranged at that part. There is a problem that you can not. Also, when a peripheral structure such as an inner belt molding is assembled to the beltline reinforcement, it is desirable that the degree of freedom of the shape of the beltline reinforcement is high.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle door frame having a beltline reinforcement that achieves both rigidity and strength and a high degree of freedom in setting the shape. .

The present invention relates to a vehicle door frame having a door sash that forms a window opening and a beltline reinforcement extending along a beltline, and is a first molding formed by light metal extrusion molding. The belt line reinforcement is configured by stacking and fixing a member and a second molding member formed by press molding of a metal material in the door thickness direction.

The first molded member and the second molded member have overlapping portions that do not overlap with each other and non-overlapping portions that do not overlap, and the non-overlapping portions of the second forming member are curved in the longitudinal direction of the belt line reinforcement. A direction bending portion may be formed. This longitudinally curved portion can be used, for example, as an inner belt molding mounting portion that elastically contacts the window glass that moves up and down in the window opening from the inside of the vehicle.

The rigidity and strength of the belt line reinforcement can be increased by forming a hollow portion having a closed cross section by the non-overlapping portions of the first molded member and the second molded member in the joined state. In the first molded member, it is preferable that the thickness of the formation part (non-overlapping part) and the overlapping part of the hollow part is different. In addition, it is possible to form a curved portion having a curved shape in a cross section orthogonal to the longitudinal direction of the beltline reinforcement in a part of the formation portion of the hollow portion in the first molded member. A configuration in which the curved portion of the first molded member and the second molded member are fixed by welding can also be selected.

When a part of the door sash is located on the longitudinal extension of the second molded member, an escape portion bent into a shape that does not interfere with the door sash may be formed in the second molded member. The space between the longitudinal end of the second molded member and the door sash may be fixed by welding.

An intermediate member that connects the door sash and the beltline reinforcement is provided, and a bending support portion that is bent in the thickness direction of the door and fixed to the intermediate member by welding is formed at the longitudinal end portion of the second molded member. Thus, the support strength of the second molded member can be increased.

A through hole in the thickness direction of the door may be provided in at least one of the first molded member and the second molded member. By forming the first molded member and the second molded member as separate members, the through hole can be easily formed.

According to the vehicle door frame of the present invention described above, the belt line reinforcement is configured by combining the first molded member and the second molded member having the irregular cross-sectional shape, so that there is no restriction on the arrangement of the belt line reinforcement. The area that can be reinforced by the beltline reinforcement can be lengthened and the rigidity and strength can be increased. Further, the combination of the first molded member by light metal extrusion and the second molded member by press molding makes it easy to ensure the bending rigidity and strength of the beltline reinforcement itself. Further, by forming the first molded member and the second molded member separately, the degree of freedom in setting the shape of each molded member is increased. Therefore, a vehicle door frame having a beltline reinforcement that achieves both rigidity and strength and a high degree of freedom in setting the shape can be obtained.

It is a side view of the door for vehicles to which the present invention is applied. It is the perspective view which looked at the door frame assembly which comprises the door of FIG. 1 from the vehicle inner side. FIG. 3 is a cross-sectional view of a belt line reinforcement along the line AA in FIG. 2. FIG. 3 is a cross-sectional view of a belt line reinforcement along the line BB in FIG. 2. FIG. 2 is a cross-sectional view of a belt line portion of a door taken along a line CC in FIG. 1. FIG. 5 is a cross-sectional view showing another embodiment of a belt line reinforcement having a cross-sectional shape different from those in FIGS. 3 and 4. It is sectional drawing which shows another embodiment of the beltline reinforcement which has the cross-sectional shape of the rear-end part different from FIG. It is sectional drawing which shows the conventional beltline reinforcement. It is sectional drawing of the beltline part of the door provided with the beltline reinforcement of FIG.

A door 10 shown in FIG. 1 is a front side door of an automobile, and includes a door panel 11 and a frame-shaped door sash 12 positioned on the upper portion of the door panel 11, and is surrounded by an upper edge portion of the door panel 11 and the door sash 12. A window glass 14 that can be raised and lowered is provided in the window opening 13. The window glass 14 is a curved glass that follows the outer shape of the door 10, and is raised and lowered by a window regulator (not shown) provided in the door panel 11.

The door panel 11 includes an inner panel 15 (FIG. 5) located on the inside of the vehicle and an outer panel (not shown) located on the outside of the vehicle. The door sash 12 includes an upper sash 17 having a shape along the door opening of the roof panel of the vehicle body (not shown) and a side sash 18 having a shape extending in the vertical direction from the rear portion of the door panel 11 along the center pillar of the vehicle body. It is configured. A mirror reinforcement (intermediate member) 19 is fixed to the lower part of the upper sash 17, and a lock reinforcement (intermediate member) 20 is fixed to the lower part of the side sash 18. The mirror reinforcement 19 supports a door mirror (not shown), and the lock reinforcement 20 supports a door lock mechanism (not shown).

A belt line reinforcement 25 that is a strength member is provided inside the belt line portion of the door 10. The beltline reinforcement 25 is a long member extending in the front-rear direction of the door 10, the vicinity of the front end is fixed to the upper sash 17 and the mirror reinforcement 19, and the vicinity of the rear end is the side sash 18 and the lock reinforcement. 20 is fixed. The fixing structure of the beltline reinforcement 25 will be described later. As shown in FIG. 2, a frame-like door frame assembly (door frame structure) is formed by the door sash 12, the mirror reinforcement 19, the lock reinforcement 20, and the beltline reinforcement 25, and this frame assembly is attached to the door panel 11. It is attached to. More specifically, predetermined portions of the mirror reinforcement 19, the lock reinforcement 20, and the beltline reinforcement 25 are fixed to the inner panel 15.

As shown in FIG. 3 to FIG. 5, the beltline reinforcement 25 includes a hollow portion having a closed cross-sectional shape and a pair of flange portions projecting above and below the hollow portion, and is located on the inner side of the vehicle. The beltline reinforcement inner (first molding member) 30 and the beltline reinforcement outer (second molding member) 40 positioned on the vehicle exterior side are overlapped and joined in the door thickness direction.

The beltline reinforcement inner 30 is formed by extrusion molding of a light metal such as aluminum, and includes an inner wall portion 31 that forms a part of a hollow portion in the beltline reinforcement 25, and an upper flange portion that protrudes above the inner wall portion 31. 32 and a lower flange portion 33 projecting downward from the vehicle interior side wall portion 31. A curved portion 34 having a non-linear curved shape is formed between the vehicle interior side wall portion 31 and the upper flange portion 32 in a cross section perpendicular to the longitudinal direction of the beltline reinforcement 25. The curved portion 34 constitutes a part of the hollow portion of the beltline reinforcement 25 together with the vehicle interior side wall portion 31. The beltline reinforcement inner 30 is partially different in thickness (plate thickness), and the thickness of the vehicle interior side wall portion 31 and the curved portion 34 is larger than that of the upper flange portion 32 and the lower flange portion 33. As shown in FIG. 2, a plurality of through-holes 35 penetrating in the thickness direction of the door are further provided on the inner wall 31 of the beltline reinforcement inner 30 at different positions in the longitudinal direction of the beltline reinforcement 25. Is formed. The through hole 35 is used as a work escape hole when the window regulator is attached, and as a reference hole when the beltline reinforcement 25 and the door frame assembly are assembled.

The beltline reinforcement outer 40 is formed by press-molding a metal material such as aluminum or iron, and includes a vehicle outer wall portion (longitudinal bending portion) 41 constituting a part of a hollow portion in the beltline reinforcement 25, and a vehicle outer side. An upper flange portion 42 that protrudes above the wall portion 41 and a lower flange portion 43 that protrudes below the vehicle outer wall portion 41 are provided. As shown in FIGS. 3 and 4, the vehicle outer side wall portion 41 has an uneven cross-sectional shape in which protrusions toward the vehicle outer side and protrusions toward the vehicle inner side are alternately present.

The beltline reinforcement outer 40 further includes a molding support portion (longitudinal bending portion) 44 extending upward from the upper flange portion 42. An inner belt molding (not shown) is supported by the molding support portion 44. The inner belt molding is a sealing member that elastically contacts the window glass 14 from the inside of the vehicle. As shown in FIG. 2, in the longitudinal direction of the beltline reinforcement 25, the molding support 44 has a curved shape corresponding to the shape of the window glass 14, and the inner belt molding supported by the molding support 44 is used. The window glass 14 can be reliably brought into contact with. 3 and 4 show the difference in cross-sectional shape of the molding support 44 according to the longitudinal position of the beltline reinforcement 25, and the longitudinal direction of the molding support 44 is closer to the longitudinal direction than the cross-sectional position of FIG. The cross-sectional position in FIG. 4 that is closer to the end portion has the molding support portion 44 that is largely offset toward the vehicle inner side with respect to the upper flange portion 42.

As shown in FIGS. 3 and 4, the vehicle outer side wall portion 41 of the beltline reinforcement outer 40 is further moved in the longitudinal direction of the beltline reinforcement 25 (the vehicle longitudinal direction) to thereby increase the thickness of the door. A plurality of through holes 45 penetrating in the direction are formed (the through holes 45 are virtually shown because they do not exist at the cross-sectional positions in FIGS. 3 and 4). The through hole 45 is used as a mounting hole for the window regulator, or a reference hole when the beltline reinforcement 25 or the door frame assembly is assembled. Similar to the inner belt molding, the base member constituting the window regulator has a shape corresponding to the curvature of the window glass 14, and the vehicle outer side wall portion 41 of the beltline reinforcement outer 40 to which the window regulator is attached is supported by the molding. It has a curved shape in the longitudinal direction like the portion 44. In FIG. 5, an intermediate portion of the vehicle outer side wall portion 41 is omitted, but the vehicle outer side wall portion 41 is curved such that the center portion protrudes to the vehicle outer side from both end portions in the longitudinal direction.

As long as the beltline reinforcement inner 30 is a light metal that can be extruded and the beltline reinforcement outer 40 is a metal material that can be press-molded, each material can be arbitrarily selected. As an example, when the beltline reinforcement inner 30 is made of aluminum, 6000 series aluminum is suitable. When the beltline reinforcement outer 40 is made of aluminum, 5000 series or 7000 series aluminum is suitable.

The beltline reinforcement inner 30 and the beltline reinforcement outer 40 are joined and fixed by overlapping the upper flange portion 32 and the upper flange portion 42, and the lower flange portion 33 and the lower flange portion 43, respectively. As a method for joining and fixing the flange portions, any method can be selected from self-piercing rivets (SPR), blind rivets, mechanical clinching, spot welding, friction stir welding (FSW), adhesion, and the like. The joint fixing portions (upper and lower flange portions) are the overlapping portions of the beltline reinforcement inner 30 and the beltline reinforcement outer 40. On the other hand, the inner side wall portion 31 and the curved portion 34 of the beltline reinforcement inner 30 and the outer side wall portion 41 and the molding support portion 44 of the beltline reinforcement outer 40 are the same as the beltline reinforcement inner 30 and the beltline reinforcement outer. It becomes a non-overlapping part which does not overlap each other in the state where 40 is joined and fixed.

FIG. 5 shows a state where the door frame assembly shown in FIG. 2 is assembled to the inner panel 15. The beltline reinforcement inner 30 is extended along the inner panel 15, and the longitudinal front and rear ends of the beltline reinforcement outer 40 are positioned along the mirror reinforcement 19 and the lock reinforcement 20. Although omitted in FIG. 5, in the completed state of the door 10, the outer panel of the door panel 11 is located outside the mirror reinforcement 19 and the lock reinforcement 20.

As shown in FIG. 5, the inner panel 15 includes a vehicle inner side surface 15 a located on the vehicle inner side, a front bent portion 15 b and a rear bent portion 15 c formed by bending front and rear end portions of the vehicle inner side surface 15 a toward the vehicle outer side. have. The inner side wall portion 31 of the beltline reinforcement inner 30 is fastened and fixed to the inner side surface 15a of the inner panel 15, the front end portion of the beltline reinforcement inner 30 is located in the vicinity of the front bent portion 15b, and the rear end portion is It is located in the vicinity of the rear bent portion 15c.

As shown in FIG. 5, the mirror reinforcement 19 is bent outward in the vehicle direction with respect to the vehicle interior side surface 15a of the inner panel 15 and in the front-rear direction extending portion 19a. And a support 19c positioned at the end of the bend 19b and abutted and fixed to the front bend 15b. The vicinity of the front end portion of the vehicle outer side wall portion 41 of the beltline reinforcement outer 40 is an overlapping portion 45 that overlaps along the longitudinally extending portion 19a, and the vehicle outer side along the bent portion 19b continues from the overlapping portion 45. And a bending support portion 46 that is bent into a bent shape. A space between the edge of the bending support portion 46 and the bending portion 19b is fixed by the welded portion W1. The vicinity of the front end portion of the beltline reinforcement outer 40 is also welded to the upper sash 17.

As shown in FIG. 5, the lock reinforcement 20 is bent to the vehicle outer side with respect to the front-rear extending portion 20 a located on the outer side of the inner side surface 15 a of the inner panel 15 and the front-rear extending portion 20 a. It has a bent portion 20b that faces the side bent portion 15c, and a support portion 20c that is located at the end of the bent portion 20b and is abutted and fixed to the rear bent portion 15c. The side sash 18 includes a glass run holding portion 18a having a concave cross section that holds a glass run (not shown), and a cylindrical portion 18b having a closed cross section that protrudes inward of the glass run holding portion 18a. The longitudinally extending portion 20a and the bent portion 20b of the lock reinforcement 20 are fixed to the outer surface of the side sash 18 extending from the glass run holding portion 18a to the tubular portion 18b. The vicinity of the rear end portion of the beltline reinforcement outer 40 is an escape portion 47 that is offset toward the vehicle inner side with respect to the longitudinal intermediate portion of the beltline reinforcement outer 40 and does not interfere with the side sash 18. Yes. The escape portion 47 is located between the beltline reinforcement inner 30 and the longitudinally extending portion 20a of the lock reinforcement 20, and is fixed to both.

6 and 7 show different embodiments of the beltline reinforcement 25. FIG. In FIG. 6, the upper flange portion 32 is omitted from the beltline reinforcement inner 30, and the upper end portion of the curved portion 34 is aligned with the boundary portion between the vehicle outer wall 41 and the upper flange portion 42 in the beltline reinforcement outer 40. It is a form. The beltline reinforcement inner 30 and the beltline reinforcement outer 40 are fixed by welding at the welded portion W2 along the upper end portion of the curved portion 34.

FIG. 7 shows a configuration in which the rear end shape of the beltline reinforcement outer 40 of the beltline reinforcement 25 is different from that of FIG. As shown in FIG. 5, the rear end portion of the beltline reinforcement outer 40 is not offset toward the vehicle interior (the escape portion 47 is not formed), and the rear end surface of the beltline reinforcement outer 40 is the side sash 18. It faces the cylindrical portion 18b. The beltline reinforcement outer 40 and the side sash 18 are fixed by welding at the welded portion W3 along the facing portion.

As described above, the vehicle door frame to which the beltline reinforcement 25 configured by combining the beltline reinforcement inner 30 and the beltline reinforcement outer 40 has the following effects. First, the strength can be improved by the high degree of freedom in setting the shape of the beltline reinforcement 25. As shown in FIGS. 5 and 7, a part of the side sash 18 is located on the extension of the beltline reinforcement outer 40 constituting the beltline reinforcement 25, whereas the beltline reinforcement 25 is The beltline reinforcement inner 30 that is formed is not restricted by the side sash 18 or the like, and extends substantially along the entire inner side surface 15a of the inner panel 15 from the nearest portion of the front bent portion 15b to the nearest portion of the rear bent portion 15c. It can be extended. Therefore, the beltline reinforcement 25 is not shortened with respect to the beltline, and contributes to ensuring rigidity and strength over the entire beltline. In the form of FIG. 5, in addition to the beltline reinforcement inner 30, the beltline reinforcement outer 40 is also extended to the vicinity of the rear bent portion 15 c by forming a relief portion 47 on the rear end side. The rigidity and strength of the rear end portion of the reinforcement 25 are further increased. Further, the front end side of the beltline reinforcement outer 40 is supported by two surfaces of the front-rear direction extending portion 19a and the bending portion 19b, so that the coupling strength to the mirror reinforcement 19 is high. Further, in the beltline reinforcement inner 30, the thickness of the vehicle interior side wall portion 31 and the curved portion 34 that do not overlap with the beltline reinforcement outer 40 is set to the thickness of the upper flange portion 32 and the lower flange portion 33 that overlap with the beltline reinforcement outer 40. By making it larger than the thickness, the rigidity and strength of the beltline reinforcement 25 itself is also increased. In light metal extrusion used for forming the beltline reinforcement inner 30, different thicknesses can be set for each part. In particular, when a portion such as the curved portion 34 is formed by press molding, the thickness becomes thin. However, the thickness can be easily controlled by extrusion molding, and sufficient strength can be given even in a cross-sectional shape including the curved portion 34.

Also, since the beltline reinforcement 25 has a high degree of freedom in shape, it is excellent in assembling of peripheral members such as a window regulator and an inner belt molding. As described above, the window regulator mounting portion and the inner belt molding support portion need to be curved along the window glass 14, but in the beltline reinforcement outer 40, which is a press-molded product, in the longitudinal direction. The car outer wall 41 and the molding support 44 having a curved shape can be formed easily and at low cost. The vehicle outer wall 41 and the molding support 44 in the beltline reinforcement outer 40 are non-overlapping portions that do not overlap the beltline reinforcement inner 30, so that the shape on the beltline reinforcement inner 30 side is not restricted. An arbitrary curved shape can be set.

Beltline reinforcement 25 is also excellent in terms of productivity. Since the beltline reinforcement inner 30 and the beltline reinforcement outer 40 do not have a closed cross section in the state before the combination, forming the through hole 35 and the through hole 45 before the combination facilitates the drilling operation. Become. Further, when forming a long member including a hollow portion having a closed cross section like the belt line reinforcement 25, the belt line reinforcement inner 30 and the belt line reinforcement outer are formed rather than being formed as an integrated structure having a uniform cross section. Manufacturing and combining plate-like members having non-closed cross-sections such as 40 individually can be easily and inexpensively manufactured as a whole.

As a comparative example with the present invention, a beltline reinforcement 125 configured as an integral structure is shown in FIGS. As shown in FIG. 8, the beltline reinforcement 125 is formed by forming a hollow portion 126 having a closed cross section, an upper flange 127, and a lower flange 128 as one member. Such a beltline reinforcement 125 basically has a uniform cross-sectional shape due to manufacturing restrictions. Although the mirror reinforcement 119 and the lock reinforcement 120 shown in FIG. 9 correspond to the mirror reinforcement 19 and the lock reinforcement 20 of the above-described embodiment, the shapes thereof are slightly different in accordance with the beltline reinforcement 125.

As shown in FIG. 9, since the cylindrical portion 18b of the side sash 18 is located on the rearward extension of the hollow portion 126, the rear end position of the beltline reinforcement 125 having a uniform cross-sectional shape is the cylindrical portion 18b. Limited by. As a result, unlike the embodiment of FIGS. 5 and 7, the beltline reinforcement 125 cannot enter the region between the vehicle inner side surface 15 a of the inner panel 15 and the cylindrical portion 18 b of the side sash 18, and the region Cannot be reinforced with the beltline reinforcement 125. Further, at the front end portion of the beltline reinforcement 125, the beltline reinforcement 125 is supported by the mirror reinforcement 119 on only one surface, and therefore, two beltline reinforcement outers 40 are provided on the mirror reinforcement 19. Compared with the structure of the embodiment of FIG. Further, unlike the vehicle outer wall 41 and the molding support 44 in the beltline reinforcement outer 40 of the illustrated embodiment, the beltline reinforcement 125 has a hollow portion 126 (particularly, a vehicle outer surface to which a window regulator is attached) or above. Since the flange 127 has a linear shape in the longitudinal direction, in order to support the window regulator and the inner belt molding in a curved shape matching the window glass 14, another support member is provided for the hollow portion 126 and the upper flange 127. Need to be assembled, which increases the number of parts and complicates the configuration. Further, when a through hole in the thickness direction of the door is formed in the vehicle interior or exterior wall of the hollow portion 126, it is necessary to prevent perforation in one wall from affecting the other wall. There is a manufacturing effort.

As described above, according to the door frame provided with the beltline reinforcement 25 to which the present invention is applied, the entire beltline can be reinforced without being restricted by the door sash 12 and the like, and light metal extrusion molding is possible. Since the bending rigidity and strength are ensured by setting the thickness of each part of the formed beltline reinforcement inner 30, it is excellent as a strength member. Further, the degree of freedom in setting the shape of the beltline reinforcement outer 40 having the vehicle outer wall 41 and the molding support 44 to which peripheral members such as a window regulator and an inner belt molding are attached is high.

Although the present invention has been described based on the illustrated embodiment, the present invention is not limited to the illustrated embodiment, and can be improved or modified without departing from the gist of the invention. For example, although the illustrated embodiment is applied to a front side door of an automobile, it can also be applied to a rear side door.

In the beltline reinforcement 25 of the illustrated embodiment, the beltline reinforcement inner 30 is an extrusion molded product and the beltline reinforcement outer 40 is a press molded product, but depending on the relationship with the peripheral structure such as a door sash. Thus, the member on the outside of the vehicle may be an extruded product, and the member on the inside of the vehicle may be a press-formed product. As a basic concept, press-molded products have a higher degree of freedom in shape, so the relief shape to prevent interference with the door sash, the longitudinal direction such as the window regulator mounting part and inner belt molding support part The member on the side where the curved shape is required may be a press-molded product, and the member on the side that ensures the strength over the entire length of the belt line may be an extruded product.

In the beltline reinforcement 25 of the illustrated embodiment, aluminum is exemplified as the material of the beltline reinforcement inner 30. However, a light metal other than aluminum is used as long as it satisfies the condition that extrusion molding is possible. It is also possible.

As described above in detail, in the vehicle door frame of the present invention, the first molding member formed by light metal extrusion and the second molding member formed by press molding of a metal material are arranged in the door thickness direction. The beltline reinforcement is constructed by overlapping and fixing to each other. As a result, it is possible to obtain a beltline reinforcement having a high degree of freedom in shape and being less constrained in arrangement and having excellent rigidity and strength, which contributes to an improvement in the performance of the vehicle door frame.

DESCRIPTION OF SYMBOLS 10 Door 11 Door panel 12 Door sash 13 Window opening 14 Window glass 15 Inner panel 15a Car interior side surface 15b Front side bending part 15c Rear side bending part 17 Upper sash 18 Upper sash 18a Glass run holding part 18b Cylindrical part 19 Mirror reinforcement (intermediate member) )
19a Front and rear direction extending portion

19b Bending portion

19c Supporting portion 20 Rock reinforcement (intermediate member)
20a Front and rear direction extending portion

20b Bending portion

20c Support portion 25 Beltline reinforcement 30 Beltline reinforcement inner (first molding member)
31 Car interior side wall (non-overlapping part)
32 Upper flange (overlapping part)
33 Lower flange (overlapping part)
34 Curved part (non-overlapping part)
35 Through hole 40 Beltline reinforcement outer (second molded member)
41 Car outer wall (non-overlapping part)
42 Upper flange (overlapping part)
43 Lower flange (overlapping part)
44 Mall support (non-overlapping part)
45 Overlapping part 46 Bending support part 47 Escape part W1 W2 W3 Welding part

Claims

In a vehicle door frame having a door sash that forms a window opening, and a beltline reinforcement extending along the beltline,
The beltline reinforcement is for a vehicle in which a first molded member formed by light metal extrusion and a second molded member formed by press molding of a metal material are joined and fixed in the door thickness direction. Door frame.
The vehicle door frame according to claim 1, wherein the first molding member and the second molding member have a non-overlapping portion that does not overlap with a overlapping portion that overlaps each other, and the second molding member includes The non-overlapping portion is a vehicle door frame having a longitudinally curved portion that curves along the longitudinal direction of the beltline reinforcement.
The vehicle door frame according to claim 2, wherein a hollow portion having a closed cross section is formed by the non-overlapping portion of the first molded member and the second molded member in a joined state. The molded member is a vehicle door frame in which the formation portion of the hollow portion and the thickness of the overlapping portion are different.
The vehicle door frame according to claim 2 or 3, wherein the longitudinally curved portion of the second molded member is elastically formed from the vehicle inner side with respect to the window glass that moves up and down in the window opening. A vehicle door frame to which an inner belt molding that comes into contact is attached.
4. The vehicle door frame according to claim 3, wherein the first molding member has a shape curved in a cross section orthogonal to the longitudinal direction of the beltline reinforcement at a part of the formation portion of the hollow portion. A vehicle door frame having a curved portion.
The vehicle door frame according to any one of claims 1, 2, 3 and 5, wherein a part of the door sash is formed on the longitudinal extension of the second molded member. And the second molded member has a relief portion bent into a shape that does not interfere with the door sash.
The vehicle door frame according to any one of claims 1, 2, 3 and 5, wherein a part of the door sash is formed on the longitudinal extension of the second molded member. Is a vehicle door frame in which the space between the longitudinal end of the second molded member and the door sash is fixed by welding.
The vehicle door frame according to any one of claims 1, 2, 3 and 5, further comprising an intermediate member for connecting the door sash and the beltline reinforcement, The vehicle door frame which has the bending support part which is bent by the thickness direction of a door at the longitudinal direction edge part of a 2nd shaping | molding member, and is fixed to the said intermediate member by welding.
6. The vehicle door frame according to claim 5, wherein a space between the curved portion of the first molded member and the second molded member is fixed by welding.
The vehicle door frame according to any one of claims 1, 2, 3, 5 and 9, wherein at least one of the first molded member and the second molded member. A vehicle door frame having a through hole in one side in the thickness direction of the door.