JP6498416B2 - Vehicle door frame - Google Patents

Description

  The present invention relates to a door frame that constitutes a vehicle door, and more particularly, to a structure that abuts and joins end portions of two long members constituting a door frame.

  In a vehicle door frame having a structure in which end portions of a plurality of long members are butted and joined, welding is performed along a butted portion of the end portions of the long member. For example, as in Patent Document 1, there is known a technique in which end faces of an upper sash that forms an upper edge portion of a door and an upright column sash that extends in the vertical direction of the door are attached to each other and welded together.

  A typical door frame has a portion having a cylindrical or bag-like cross-sectional shape (hereinafter referred to as a frame portion) in order to increase the cross-sectional strength. At the joint portion of the long member in the door frame, the frame portion is also subject to welding. In the door frame of Patent Literature 1, among the frame portions, a wall portion facing the vehicle interior and a wall portion facing the outer peripheral direction of the door frame (the direction opposite to the window opening) are set as welding targets (Patent Literature 1). (See FIG. 3).

JP 2003-112525 A

  In the structure in which the long members constituting the door frame are butt-joined, the smaller the welding range, the more advantageous is the improvement in production efficiency and the reduction in manufacturing costs. On the other hand, it is necessary to avoid a lack of bonding strength. That is, there has been a demand to obtain high joint strength with as little welding range as possible. An object of the present invention is to provide a vehicle door frame that satisfies this requirement.

The present invention relates to a vehicle door frame having at least two long members that are joined to each other while abutting each other, and each of the two long members is located on the inner peripheral side facing the window opening. The outer peripheral side located on the outer peripheral side opposite to the window opening with respect to the inner peripheral side , the vehicle inner side connecting the inner peripheral side and the outer peripheral side on the vehicle inner side, the inner peripheral side and the outer peripheral side part has a rectangular tube-shaped frame portion surrounded by the exterior side portion to be connected with the vehicle exterior side of the inner peripheral side portion 2 of the elongated member is another, the outer peripheral side, interior side, an end of the exterior portion The welding range in which the two long members are joined together by welding includes the vehicle inner side portion and the inner peripheral side portion of the frame portion, and does not include the outer peripheral side portion and the vehicle outer side portion. Yes.

  Furthermore, it is preferable that a cover member that covers the frame portion from the vehicle inner side is provided, and that the cover member overlaps the outer peripheral side portion and the vehicle inner side portion of the frame portion at the joining portion of the two long members.

  When the frame portion has a curved portion that connects the vehicle inner side portion and the outer peripheral side portion, the curved portion is preferably included in the welding range.

  According to the vehicle door frame of the present invention described above, it is possible to obtain a high joint strength with a smaller welding range compared to the conventional art by setting only the vehicle inner side portion and the inner peripheral side portion of the frame portion as the welding range. it can.

It is the side view which looked at the door for front seats of vehicles from the car inside. It is the perspective view which looked at the door corner part to which an upper sash and an upright pillar sash are joined among door frames from the vehicle outside in the state where a cover member was attached. It is the perspective view which looked at the door corner part from the vehicle inside. It is sectional drawing of the door corner part which follows the IV-IV line of FIG. It is the perspective view which looked at the door corner part of the state which has not attached the cover member from the vehicle outer side. It is the perspective view which looked at the door corner part from the vehicle inside. It is sectional drawing which showed the door corner part of the state which has not attached the cover member in the cross section which follows the IV-IV line of FIG. 2, and showed the welding range and the finishing range. It is sectional drawing which showed the welding range and finishing range in a door corner part with the door frame of different embodiment. It is sectional drawing which shows the door corner part of the comparative example from which this invention differs in a welding range.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a front seat door 10 (hereinafter referred to as a door 10) of an automobile. The door 10 includes a door frame (door sash) 11 and a door panel 12, and a door glass (not shown) moves up and down in a window opening 13 surrounded by the inner edge of the door frame 11 and the upper edge of the door panel 12. . When the door 10 is closed with respect to the vehicle body (not shown), the door 10 closes the door opening formed in the vehicle body. In the following description, the side facing the window opening 13 in the door frame 11 is referred to as “inner side”, and the side facing the vehicle body opening on the opposite side is referred to as “outer side”. In addition, expressions such as front, rear, upper, lower, vehicle interior, and vehicle exterior refer to directions that are based on the body of the automobile to which the door 10 is attached.

  The door frame 11 includes an upper sash 15 that forms an upper edge of the door, an upright pillar sash 16 that extends upward from the rear part of the door panel 12, and a lower sash 17 that is supported near the front part of the door panel 12. The rear end portion of the upper sash 15 and the upper end portion of the upright pillar sash 16 are joined at the door corner portion 14, and the upper sash 15 extends from the door corner portion 14 to the front portion of the door panel 12. The upper end of the lower sash 17 is connected to the middle of the upper sash 15. The front and rear edges of the door glass are held by the lower sash 17 and the vertical pillar sash 16, and the door glass can be moved up and down along the lower sash 17 and the vertical pillar sash 16. When the door glass reaches the uppermost position in the window opening 13, the upper edge of the door glass is held by the upper sash 15.

  The upper sash 15 and the upright pillar sash 16 are each constituted by a long member integrally formed. In the first embodiment shown in FIGS. 2 to 7, the upper sash 15 and the upright pillar sash 16 are formed as extruded products made of aluminum. In the door corner portion 14, the upper sash 15 and the upright column sash 16 have the same (substantially symmetrical) cross-sectional shape. It shows with.

  As shown in FIGS. 4 and 7, the upright pillar sash 16 includes an inner frame portion 20 located on the inner side of the vehicle, an extending portion 21 extending from the inner frame portion 20 toward the outer side of the vehicle, and an extended portion. And a design portion 22 connected to the vehicle outer side end portion of the portion 21. The vehicle interior frame portion 20 has a rectangular tube-shaped cross-section with a hollow inside, and an inner peripheral side portion 23 located on the inner peripheral side facing the window opening 13 and an outer peripheral side facing the inner peripheral side portion 23. And an inner side portion 25 and an outer side portion 26 that connect the inner peripheral side portion 23 and the outer peripheral side portion 24 at the vehicle inner side and the vehicle outer side, respectively. The extended portion 21 is formed at a position where the outer peripheral side portion 24 of the vehicle inner side frame portion 20 extends toward the vehicle outer side. There is a step between the extended portion 21 and the outer peripheral side portion 24, and a holding projection 29 protrudes from the step toward the outer peripheral direction. The design portion 22 includes an inner peripheral protrusion 27 that protrudes toward the inner peripheral side from the location where the extended portion 21 is connected, and an outer peripheral protrusion that protrudes toward the outer peripheral side from the location where the extended portion 21 is connected. 28.

  A portion surrounded by the vehicle outer side portion 26 of the vehicle inner side frame portion 20, the extending portion 21, and the inner peripheral protruding portion 27 of the design portion 22 includes a glass guide portion 30 having a box shape opened toward the inner peripheral side. A glass run (not shown) made of an elastic material is fitted and held inside the glass guide portion 30. The edge part of the door glass enters the glass run holding part 30, and the edge part of the door glass is held by the glass run.

  A portion surrounded by the holding projection 29, the extending portion 21, and the outer peripheral protruding portion 28 of the design portion 22 constitutes a weather strip holding portion 31 having a box shape opened toward the outer peripheral side, and is made of an elastic material. A strip (not shown) is held by the weather strip holder 31. The weather strip has a leg portion that fits in the weather strip holding portion 31 and an elastic contact portion that protrudes outward from the weather strip holding portion 31, and the elasticity of the weather strip when the door 10 is closed. The contact portion comes into contact with the opening of the vehicle body and is elastically deformed, and the weather strip makes the space between the door 10 and the vehicle body liquid-tight.

  The upper sash 15 in the door corner portion 14 has a cross-sectional shape substantially symmetric with the cross-sectional shape of the upright pillar sash 16 shown in FIGS. 4 and 7, and the rear end portion of the upper sash 15 as shown in FIGS. 5 and 6. And the upper end of the upright can be abutted.

  As shown in FIGS. 2 to 4, a cover member 40 that covers the vehicle inner side frame portions 20 of the upper sash 15 and the upright pillar sash 16 from the vehicle inner side is attached. The cover member 40 is connected to the inner peripheral side portion 41 located on the inner peripheral side, the outer peripheral side portion 42 located on the outer peripheral side, and the inner side of the inner peripheral side portion 41 and the outer peripheral side portion 42 on the vehicle inner side. Part 43. The inner peripheral side portion 41 of the cover member 40 covers the inner peripheral side portion 23 of the vehicle inner frame portion 20, the outer peripheral side portion 42 of the cover member 40 covers the outer peripheral side portion 24 of the vehicle inner frame portion 20, and The vehicle inner side portion 43 covers the vehicle inner side portion 25 of the vehicle inner side frame portion 20. As shown in FIG. 4, in the door corner portion 14, the width of the cover member 40 (the interval between the inner peripheral side portion 41 with respect to the outer peripheral side portion 42) is expanded in the inner peripheral direction, and the inner peripheral side portion 41 of the cover member 40 is It is in a position separated from the inner peripheral side portion 23 of the vehicle interior side frame portion 20. On the other hand, also in the door corner portion 14, the outer peripheral side portion 42 of the cover member 40 overlaps along the outer surface of the outer peripheral side portion 24 of the vehicle inner frame portion 20, and the vehicle inner side portion 43 of the cover member 40 is the vehicle inner frame portion. The positional relationship of overlapping along the outer surface of the 20 vehicle interior side portions 25 is maintained.

  5 and 6 show the door corner portion 14 in a state where the cover member 40 is not attached. As shown in FIGS. 5 and 6, a joining line G is formed along a portion where the end portions of the upper sash 15 and the upright column sash 16 abut each other. Then, welding is performed in a predetermined range along the butt portion (joining line G) between the upper sash 15 and the upright column sash 16. The welding at this time can be appropriately selected from known welding such as laser welding, plasma welding, and arc welding (TIG welding, MIG welding, etc.). S1 in FIG. 7 shows the welding range of the butted portion of the upper sash 15 and the upright column sash 16. This welding range S <b> 1 is a range from the vehicle inner side portion 25 to the inner peripheral side portion 23 of the vehicle inner side frame portion 20. More specifically, the welding range S <b> 1 is substantially the entire vehicle inner side portion 25 and the vehicle of the inner peripheral side portion 23. A predetermined range that advances from the boundary portion with the inner portion 25 in the vehicle outward direction is a welding target region. One end T1 of the welding range S1 is located at a boundary portion between the vehicle inner side portion 25 and the outer peripheral side portion 24, and the other end T2 of the welding range S1 is closer to the vehicle outer side portion 26 of the inner peripheral side portion 23. The position is set. Furthermore, the portion of the vehicle interior side 25 in the welding range S1 is a finishing range S2 in which a finishing process is performed by cutting and polishing a welding mark (bead). One end of the finishing range S2 coincides with one end T1 of the welding range S1 (a boundary portion between the vehicle inner side portion 25 and the outer peripheral side portion 24), and the other end T3 of the finishing range S2 is the inner side portion 25 and the inner peripheral side portion. 23 is located at the boundary portion. A portion of the welding range S1 on the inner peripheral side portion 23 is not finished.

  Due to the structure of the door frame 11, the door corner portion 14 has a load (an arrow in FIG. 5) that separates the inner peripheral portion from the joint portion of the upper sash 15 and the upright pillar sash 16 with the outer peripheral portion serving as a fulcrum. It is easy to work. By welding in the welding range S <b> 1 from the vehicle inner side portion 25 to the inner peripheral side portion 23 of the vehicle inner side frame portion 20, excellent strength against such a load can be obtained. More specifically, in the door corner portion 14 shown in FIG. 5, a location on the inner peripheral side with respect to the position of the arrow M is included in the welding range S <b> 1, and when the location on the inner peripheral side is welded, the arrow M When a load in the direction is received, a force in a direction in which the upper sash 15 and the upright column sash 16 are brought into close contact with each other in a region along the joining line G is applied. As a result, sufficient strength can be obtained even if the welding range is narrowed, and the time required for the welding operation can be shortened. Note that it is possible to arbitrarily set how much portion of the inner peripheral side portion 23 is included in the welding range S1 on the premise that a necessary joint strength is obtained. For example, the end T2 of the welding range S1 is brought closer to the vehicle inner side 25 to narrow the welding range (shorter along the joining line), or the end T2 of the welding range S1 is brought closer to the outer side 26 to perform welding. The range can be increased (longer along the joining line). When the welding range is narrowed, the end T2 is set in a range not reaching the vehicle inner side 25, and when the welding range is widened, the end T2 is set within a range not reaching the vehicle outer side 26.

  After the upper sash 15 and the upright column sash 16 are joined by welding, the cover member 40 is attached as described above. As shown in FIG. 4, in the door corner portion 14, the outer peripheral side portion 42 and the vehicle inner side portion 43 of the cover member 40 are positioned along the outer peripheral side portion 24 and the vehicle inner side portion 25 of the vehicle inner side frame portion 20. The outer peripheral side portion 24 is not included in the welding range S1 shown in FIG. 7, and the vehicle inner side portion 25 is the finishing range S2 that is finished after welding. Can be stacked with high accuracy. As shown in FIG. 4, the inner peripheral side 23 of the cover member 40 is not subjected to finishing after welding (not included in the finishing range S2) in the welding range S1 of the vehicle interior frame portion 20. Since the part 41 is in a position separated without overlapping, even if a welding mark is left, the assembly accuracy of the cover member 40 is not affected. Moreover, since the welding trace in the inner peripheral side part 23 is concealed by the cover member 40 so as not to be visually recognized from the inside of the vehicle, the aesthetic appearance is not affected even without finishing.

  FIG. 9 shows a comparative example in which the welding range is different from that of the illustrated embodiment. In this comparative example, a welding range in a conventional door frame described in Patent Document 1 is applied to a door frame having the same cross-sectional shape as the illustrated embodiment, and reference numerals of respective parts of the door frame shown in FIG. Uses the same reference numerals as in FIG. A welding range S <b> 1 ′ shown in FIG. 9 is a portion that covers substantially the entire outer peripheral side portion 24 and substantially the entire vehicle interior portion 25 of the vehicle interior frame portion 20. Since the welding range S1 ′ does not include the inner peripheral side portion 23 of the vehicle interior frame portion 20 as a welding target, the welding range S1 ′ is applied to a load M (FIG. 5) for opening the inner peripheral portions of the upper sash 15 and the upright column sash 16. Hard to secure strength. More specifically, when the welding range S1 'shown in FIG. 9 is applied, the outer peripheral side of the door corner portion 14 shown in FIG. When only the outer peripheral side is welded, a force in the direction of separating the upper sash 15 and the upright column sash 16 acts in a region along the joining line G when receiving a load in the direction of arrow M. Therefore, it is necessary to lengthen the welding length in order to secure the joining strength that can withstand the force in the separation direction, and it takes time and effort for the welding work. Further, when the cover member 40 is assembled in the same manner as in FIG. 4, the entire welding range S <b> 1 ′ including not only the vehicle interior portion 25 but also the outer peripheral side portion 24 is prevented in order to prevent welding marks from interfering with the cover member 40. Therefore, it is necessary to cut and polish the weld trace, which takes time for finishing.

  As described above, according to the configuration of the embodiment shown in FIG. 2 to FIG. 7, it is possible to obtain a high joint strength in a small welding range as compared with the comparative example of FIG. Effect. Also, finishing after welding can be performed with less effort than the comparative example.

  In the embodiment of FIGS. 2 to 7, the upper sash 15 and the upright pillar sash 16 are formed as an integrally molded product made of aluminum, but the material and structure of the door frame are not limited to this. Another embodiment showing an example thereof is shown in FIG. FIG. 8 shows the cross-sectional shape of the upright pillar sash 116 at the door corner, as in FIG. Although not shown in FIG. 8, the upper sash joined to the upright column sash 116 also has a (substantially symmetrical) cross-sectional shape corresponding to the upright column sash 116. The vertical pillar sash 116 has a basic structure in which an extension part 121 is extended from the vehicle inner frame part 120 toward the vehicle outer side, and a design part 122 is provided on the vehicle outer side of the extension part 121. Although it is common with the sash 16, it is different in that the first member 50 and the second member 51 are combined.

  The first member 50 is a channel material having a box-shaped cross section that constitutes the glass guide portion 130, and the inner peripheral protruding portion 127 that constitutes the vehicle outer side portion 126 and the design portion 122 that constitutes the vehicle inner side frame portion 120. The connection portion 52 is connected. The inner peripheral side connection part 52 constitutes an extension part 121. The first member 50 is formed by performing processing such as roll forming on an iron plate-like material.

  The second member 51 forms an inner peripheral side portion 123, an outer peripheral side portion 124, and an inner side portion 125 that constitute the vehicle inner frame portion 120, an outer peripheral side connection portion 53 that constitutes the connection portion 121, and a design portion 122. It has an outer periphery protruding portion 128 and is formed by performing processing such as press molding on an iron plate-like material.

  When the first member 50 and the second member 51 are combined as shown in FIG. 8, the outer side of the bag-shaped cross-section formed by the inner peripheral side portion 123, the outer peripheral side portion 124, and the vehicle inner side portion 125 of the second member 51 is shown. The vehicle outer side portion 126 of the first member 50 is closed to form the vehicle inner frame portion 120. Further, the inner peripheral protrusion 127 of the first member 50 and the outer peripheral protrusion 128 of the second member 51 are substantially flush with each other to form the design portion 122. Further, the inner peripheral side connecting portion 52 of the first member 50 and the outer peripheral side connecting portion 53 of the second member 51 are arranged at a predetermined interval to form the extending portion 121. The first member 50 and the second member 51 are welded at a predetermined site to form the upright pillar sash 116. At that time, in the vehicle inner frame portion 120, a boundary portion between the inner peripheral side portion 123 and the vehicle outer side portion 126 is welded as a welded portion W1. Although not shown, another member for holding the weather strip is further fixed to the outer peripheral side of the outer peripheral side connecting portion 53.

  The vertical pillar sash 116 having the above configuration is welded at the door corner portion in the welding range S11 shown in FIG. 8 and joined to the upper sash. The vehicle inner side frame portion 120 and the inner peripheral side portion 123 of the vehicle inner side frame portion 120 are the targets of welding at the time of joining, which is the same as in the previous embodiment, and the effects described above are obtained. As a configuration different from the previous embodiment, a boundary portion between the outer peripheral side portion 124 and the vehicle inner side portion 125 in the vehicle inner side frame portion 120 is smoothly connected by a curved portion R1 having a predetermined curvature. Further, the boundary portion between the vehicle inner side portion 125 and the inner peripheral side portion 123 in the vehicle inner side frame portion 120 is also smoothly connected by the curved portion R2. When such a portion to be welded (the vehicle inner side portion 125) and a portion adjacent thereto (the outer peripheral side portion 124) are in contact via the curved portion R1, the welding range S11 is set so as to include the curved portion R1. It is preferable. That is, as shown in FIG. 8, one end T <b> 11 of the welding range S <b> 11 may be positioned at the boundary portion between the curved portion R <b> 1 and the outer peripheral side portion 124. The other end T <b> 12 of the welding range S <b> 11 is set at an intermediate position of the inner peripheral side portion 123. The outer peripheral side portion 124 does not include the curved portion R1, and therefore the outer peripheral side portion 124 is an area outside the welding range S11. As in the previous embodiment, the end T12 of the welding range S11 can be changed closer to the vehicle inner side 125 or closer to the vehicle outer side 126. Furthermore, the finish part which cuts and grinds a welding trace (bead) is performed as a finishing range S12 about the part of the vehicle interior part 125 among welding range S11. One end of the finishing range S12 coincides with one end T11 of the welding range S11, and the other end T13 of the finishing range S12 is located at a boundary portion between the curved portion R2 and the inner peripheral side portion 123 following the vehicle interior portion 125. . Of the welding range S11, the portion of the inner peripheral side portion 123 is not subjected to finishing.

  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, the illustrated embodiment is applied to the joining of the upper sash of the door frame and the upright pillar sash, but if the long members constituting the door frame are joined by abutting each other, the upper sash and The present invention can also be applied to parts other than the joining part of the vertical pillar sash.

10 Front seat door 11 Door frame (door sash)
12 Door panel 13 Window opening 15 Upper sash 16 116 Standing column sash 17 Lower sash 20 120 Car interior frame part 21 121 Extension part 22 122 Design part 23 123 Inner peripheral side part 24 124 Outer peripheral part 25 125 Car inner part 26 126 Outer part 27 127 Inner peripheral protrusion 28 128 Outer peripheral protrusion 29 Holding protrusion 30 130 Glass guide part 31 Weather strip holding part 50 First member 51 Second member 52 Inner peripheral side connection part 53 Outer peripheral side connection part G Joining line R1 R2 Curved part S1 S11 Welding range S2 S12 Finishing range T1 T11 Welding range and finish range end position T2 T12 Welding range end position T3 T13 Finishing range end position

Claims (3)

In a vehicle door frame having at least two elongate members joined by abutting each other's ends,
Each of the two long members includes an inner peripheral side located on the inner peripheral side facing the window opening, an outer peripheral side located on the outer peripheral side opposite to the window opening with respect to the inner peripheral side, and a vehicle side connecting the inner circumferential side and the outer peripheral side portion in the vehicle side, a rectangular tube-shaped frame portion surrounded by the exterior side portion connecting said inner peripheral side and the outer peripheral side portion in the vehicle outer side And the two long members abut each other on the inner circumferential side, the outer circumferential side, the vehicle inner side, and the end of the vehicle outer side ,
A welding range in which the two long members are joined by welding includes the vehicle inner side portion and the inner peripheral side portion of the frame portion, and does not include the outer peripheral side portion and the vehicle outer side portion. Vehicle door frame.   2. The vehicle door frame according to claim 1, further comprising a cover member that covers the frame portion from the vehicle inner side, wherein the two long members are joined to the outer peripheral side portion and the vehicle inner side portion of the frame portion. A vehicle door frame on which the cover member overlaps.   3. The vehicle door frame according to claim 1, wherein the frame portion includes a curved portion that connects the vehicle inner side portion and the outer peripheral side portion, and the welding range includes the curved portion. 4. flame.

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