JP2012111380A - Door structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a door structure which can suppress the deformation of the lower part of a door while withstanding a shock (load) of a side collision, and can surely transmits the load of the side collision to a lower frame (side sill) of a vehicle body from a lower reinforcing member.SOLUTION: In the door structure, the lower reinforcing member 62 of a rear door 14 is arranged along the lower edge 63 of the rear door 14, and overlapped with a lower frame of a door opening of the vehicle body. A door beam 61 comprises a beam body 65 which extends frontward and rearward, and a beam extension part 66 which extends from the beam body 65 until reaching the lower reinforcing member 62 and is overlapped with the lower reinforcing member 62. The beam extension part 66 comprises a first extension part 73, a second extension part 74 and an extension cross end 75 overlapped with the lower reinforcing member 62.

Description

  The present invention relates to a door structure that suppresses deformation of a door when a side collision occurs.

There is a door structure in which a door beam extending in the front-rear direction is provided in an X shape in the door.
In this structure, the first door beam and the second door beam are crossed in the front door and the rear door, respectively, so that the rear end of the first door beam in the front door and the front end of the second door beam in the rear door It is provided at the rear corner of the front door that overlaps the joint with the lower side sill and at the front corner of the rear door (see, for example, Patent Document 1).
Moreover, there exists what provided the reinforcement member along the lower part of the door inner panel of a door (for example, refer patent document 2).

However, in the prior art (Patent Document 1), when the end of the door beam is arranged at the front corner (lower corner) of the rear door, a load that is input to the door beam at the time of a side collision is coupled to the lower corner of the rear door. Since it is received by only a part of the lower part of the door opening of the vehicle body (side sill), a load is locally input only to a part of the lower part of the door opening, and the load of that part increases.
In Patent Document 1, the lower corner of the rear door and the side sill of the vehicle body wrap, but when an impact is input to the door by a side collision, the lower corner is moved from the side sill to the inside of the passenger compartment by the impact (load). May come off towards you. If it comes off, the load input to the door beam cannot be transmitted to the side sill of the car body. That is, the amount of deformation of the door that deforms toward the inside of the passenger compartment increases.

  In Patent Document 2, the strength of the lower portion of the door is further increased by the reinforcing member, but it is difficult to suppress deformation of the door at the time of a side collision.

Japanese Patent Laid-Open No. 10-1000067 JP-A-8-11535

  The present invention suppresses deformation of the lower part of the door with respect to the impact (load) of the side collision, and reliably transmits the load of the side collision input to the door beam from the lower reinforcing member to the lower frame part (side sill) of the vehicle body, It is an object of the present invention to provide a door structure in which the degree of freedom of arrangement of door beams is improved.

  In order to solve the above problems, the invention according to claim 1 is a door structure in which a door beam is provided inside a door attached to a door opening of a side body that forms a side wall of a passenger compartment. The lower reinforcing member is provided along the lower edge of the door, and is disposed so as to overlap the lower frame portion of the door opening in a side view of the vehicle, and the door beam extends in the front-rear direction. And a beam extension part extending from the beam body to reach the lower reinforcing member and overlapping.

  The invention according to claim 2 is characterized in that the beam extending portion is provided outside the vehicle from the lower reinforcing member.

  The invention according to claim 3 is characterized in that a door stopper is provided at the lower portion of the door where the overlapping portion where the beam extending portion and the lower reinforcing member are overlapped, and abuts against the lower frame portion with the door closed. And

  In the invention according to claim 4, the beam extension part includes a first extension part extending from the beam body, a second extension part extending from the beam body toward the tip of the first extension part, The extended intersection end part which made the front-end | tips of a 1st extension part and a 2nd extension part continue integrally, and the extension intersection end part has overlapped with the lower reinforcement member, It is characterized by the above-mentioned.

  In the invention which concerns on Claim 5, a 1st extension part overlaps with the lower frame part of a vehicle door side view and a door opening part, and a 2nd extension part is a vehicle side view, and the vertical line | wire continued to a lower frame part of a door opening part. Overlapping the frame part, the extended intersection end part is a vertical frame connecting part in which the corners formed at the tips are continuously curved and the corners formed by the lower frame part and the vertical frame part are curved. The vehicle body side view is characterized by overlapping.

  The invention according to claim 6 is characterized in that one end of the beam body overlaps one end in the front-rear direction of the lower reinforcing member, and the beam extension portion overlaps the other end in the front-rear direction of the lower reinforcing member. To do.

  In the invention according to claim 7, the door has a closed cross-sectional shape formed by the outer panel and the inner panel, and the beam extending portion is sandwiched between the peripheral edge of the inner panel and the peripheral edge of the outer panel. To do.

  In the invention according to claim 8, the beam extending portion has a hat-shaped cross section, the opening is directed to the passenger compartment, and one flange portion is formed in connection with one edge of the opening, and is connected to the other edge of the opening. The other flange portion is formed, and one flange portion and the other flange portion are joined to the lower reinforcing member.

In the invention according to claim 1, the lower reinforcing member inside the door is provided along the lower edge of the door, and is disposed so as to overlap the lower frame portion of the door opening. The beam extension part extends from the beam body until reaching the lower reinforcing member, and the lower reinforcing member increases the strength of the door lower part of the door and suppresses deformation of the lower part of the door at the time of a side collision. Can do. Thereby, it is possible to maintain the overlap between the lower portion of the door and the lower frame portion of the door opening at the time of a side collision.
That is, the amount pushed into the passenger compartment can be suppressed.

Since the beam extension and the lower reinforcement member overlap, the impact (load) transmitted to the beam body during a side collision is transmitted from the beam extension to the lower reinforcement member, and the load is applied from the lower reinforcement member to the lower frame of the door opening. Can be communicated.
Therefore, it can suppress that a load increases locally and a door beam remove | deviates from a lower frame part.

  Since the beam extending portion is overlapped with the lower reinforcing member, the degree of freedom of the layout of the beam main body is improved as compared with the case where the beam main body is directly overlapped with the lower lower reinforcing member.

  In the invention according to claim 2, since the beam extending portion is provided outside the vehicle from the lower reinforcing member, when the beam extending portion is pushed at the time of a side collision, the lower reinforcing member is directly pushed to the lower reinforcing member. Tell the load. Therefore, the load can be transmitted reliably.

  In the invention according to claim 3, since the door stopper is provided at the lower portion of the door where the overlapping portion where the beam extending portion and the lower reinforcing member are overlapped is disposed, and the door is closed, the overlapping is performed. The stopper mounting part that provides the door stopper depending on the part has increased strength. By attaching the door stopper to this strong stopper mounting part, the mounting accuracy of the door stopper, in other words, the accuracy of the gap between the door and the side body is increased. There is an advantage.

  When the door is closed, the door is always in contact with the lower frame (side sill of the side body) by the door stopper. Therefore, when a side collision occurs, the impact (load) is transmitted from the door beam to the overlapping portion, and the load can be transmitted from the overlapping portion to the lower frame portion (side body (vehicle body)) via the door stopper in a short time.

  In the invention according to claim 4, the beam extending portion includes a first extending portion extending from the beam main body, a second extending portion, and an extending intersection end portion in which these are continuously integrated. Since the extended intersection end portion overlaps the lower reinforcing member, when a plurality of extended portions (first extended portion, second extended portion) are provided, the load is first extended from the beam body at the time of a side collision. The load input to the beam main body can be more reliably transmitted to the lower reinforcing member by being distributed to the protruding portion and the second extending portion.

  The extension crossing end portion has a high strength by the first extension portion and the second extension portion, and when the load at the time of a side collision is transmitted to the extension crossing end portion having this high strength, the load is surely transmitted by the lower reinforcing member. be able to.

  In the invention which concerns on Claim 5, a 1st extension part overlaps with the lower frame part of a door opening part, a 2nd extension part overlaps with the vertical frame part of a door opening part, and an extension crossing edge part is a corner. Since it is overlapped with the curved vertical frame connecting part, the load transmitted to the door beam at the time of side collision is transmitted from the door beam to both the lower frame part and the vertical frame part of the door opening. Can do.

  Since the extended intersection end is a curved shape, it coincides with the vertical frame connecting part between the lower frame part and the vertical frame part of the door opening, and the load at the time of a side collision is reliably transmitted by the lower frame part and the vertical frame part. be able to.

  Since the extended intersection end is curved, the load at the time of a side collision is difficult to concentrate on the extended intersection end that forms the tip of the first extension portion and the second extension portion. Can be communicated to the frame connection.

  In the invention according to claim 6, one end of the beam body overlaps one end in the front-rear direction of the lower reinforcing member, and the beam extension portion overlaps the other end in the front-rear direction of the lower reinforcing member. And a load can be transmitted to the both ends of a lower reinforcement member by a beam extension part, and the whole lower reinforcement member can be pressed on a lower frame part. Therefore, the load at the time of a side collision can be reliably transmitted to the lower frame part.

  In the invention according to claim 7, since the door has a closed cross-sectional shape formed by the outer panel and the inner panel, and the beam extension portion is sandwiched between the peripheral edge portion of the inner panel and the peripheral edge portion of the outer panel, When joining the edges of the inner panel (for example, hemming), the beam extending portions can be sandwiched at the same time, and the beam extending portion can be easily assembled.

  In addition, since the beam extension is sandwiched between the outer panel and the inner panel, the strength for supporting the beam extension is increased.

  Furthermore, since a door beam can be arrange | positioned in the site | part which an outer panel and an inner panel approach most, a door beam can be arrange | positioned along an outer panel.

  In the invention according to claim 8, since the beam extending portion is hat-shaped and one flange portion and the other flange portion are joined to the lower reinforcing member, the load at the time of a side collision is bent to the beam extending portion. When input as a load, the load is distributed by the hat shape. Therefore, the strength of the beam extension portion can be increased.

  Also, since one flange part and the other flange part are joined to the lower reinforcing member, the load input to the door beam can be reliably transmitted to the lower reinforcing member at the time of a side collision, and the opening of the beam extension part Can be prevented from spreading.

It is a side view of the rear part of the vehicle which employ | adopted the door structure which concerns on the Example of this invention. It is a side view of the door structure concerning an example. FIG. 3 is a sectional view taken along line 3-3 in FIG. 1. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. FIG. 5 is a sectional view taken along line 5-5 of FIG. FIG. 6 is a sectional view taken along line 6-6 of FIG. It is the perspective view which looked at the door which employ | adopted the door structure which concerns on an Example from the inner side. It is a figure explaining the mechanism which distributes the impact at the time of side collision of a door structure.

  Hereinafter, embodiments of the present invention will be described in detail with reference to examples.

  "Front" and "Rear" are vehicle standards, "Front" is the forward side, "Rear" is the reverse side and the reverse side is the reverse, "Left" and "Right" are the vehicle standards, and the driver is sitting in the driver's seat of the vehicle The direction as seen from.

As shown in FIG. 1, the vehicle 11 has four doors, a front door 13 and a rear door 14 attached to the vehicle body 12, and the door structure according to the embodiment is adopted for the rear door 14.
As shown in FIGS. 1 and 8, the vehicle body 12 includes a side body 21 that forms the side wall of the passenger compartment 18, an underbody 22 that forms a floor, and a roof 23.

  The side body 21 includes a side sill 25 continuous to the underbody 22, a center pillar 26 that stands on the center of the side sill 25 and supports the roof 23, and a rear pillar 28 that stands on the rear end 27 of the side sill 25 and supports the roof 23. .

Further, a rear door opening 31 is formed by the side sill 25, the center pillar 26, the rear pillar 28, and the roof 23 where passengers get on and off.
Specifically, the rear door opening 31 is formed by a rear lower frame portion 33, a rear upper frame portion 34, a center rear vertical frame portion 35, and a rear vertical frame portion 36.

The rear lower frame portion 33 is a side sill rear portion 38 of the side sill 25.
The rear upper frame portion 34 is the roof side rail rear portion 42 of the roof side rail 41.

The center rear vertical frame portion 35 is a rear portion of the center pillar 26 along the rear door 14.
The rear vertical frame portion 36 is included in the rear pillar 28 and is a portion along the rear door 14. And the striker 45 of the door lock apparatus 44 which fixes opening and closing of the rear door 14 is attached.

As shown in FIGS. 1 and 3, the rear door 14 supports a door panel 47 supported by the center pillar 26 so as to be opened and closed, a door glass 48 provided in the door panel 47 so as to be movable up and down, and supports the door glass 48. A door glass run 51 and an interior member 52 attached to the door panel 47 are included.
The door panel 47 includes an inner panel 54 and an outer panel 55.

Next, the main structure of the door structure according to the embodiment will be described with reference to FIGS.
FIG. 3 is a sectional view of the door, but shows only the main configuration.

  In the door structure, a door beam 61 is provided inside a door (rear door 14) attached to a door opening (rear door opening 31) of the side body 21 that forms the side wall of the vehicle interior 18.

In addition, the door (rear door 14) has a lower reinforcing member 62. The lower reinforcing member 62 is provided along the lower edge 63 of the door (rear door 14) and below the door opening 31. It overlaps and arrange | positions by the vehicle 11 side view (viewpoint of FIG. 1) at the frame part (rear lower frame part 33). The overlap amount was defined as a lap amount, and the lap amount B (FIG. 3) was overlapped.
The door beam 61 includes a beam main body 65 extending in the front-rear direction, and a beam extending portion 66 that extends from the beam main body 65 to reach the lower reinforcing member 62 and overlaps.

  The beam body 65 extends from the front portion 111 of the door 14 in the front-rear direction of the door 14 to the rear portion 112 of the door 14. One end 81 of the beam body 65 extends to the center rear vertical frame portion 35 of the door opening (rear door opening 31), and the other end 65a of the beam main body 65a the rear vertical frame of the door opening (rear door opening 31). It extends to the part 36.

The beam extending portion 66 is provided outside the vehicle 11 with respect to the lower reinforcing member 62 (FIGS. 3, 5, and 6).
A door stopper 71 is provided on the lower portion 68 (FIG. 7) of the door (rear door 14) where the overlapping portion 67 where the beam extending portion 66 and the lower reinforcing member 62 are overlapped is disposed, and the door (rear door 14) is closed. In contact with the lower frame portion (rear lower frame portion 33) in the state (FIG. 3).

Further, as shown in FIG. 2, the beam extending portion 66 includes a first extending portion 73 extending from the beam main body 65 and a second extending from the beam main body 65 toward the tip of the first extending portion 73. The extending portion 74 includes an extending intersection end portion 75 in which the tips of the first extending portion 73 and the second extending portion 74 are continuously connected.
The extended intersection end portion 75 overlaps the lower reinforcing member 62.
The extended intersection end portion 75 is included in the overlapping portion 67.

The 1st extension part 73 overlaps with the lower frame part (rear lower frame part 33) of the vehicle opening 11, and the door opening part 31 (FIG. 8).
The second extending portion 74 overlaps the vertical frame portion (rear vertical frame portion 36) that is continuous with the lower frame portion (rear lower frame portion 33) of the door opening 31 as viewed from the side of the vehicle 11 (FIG. 8).

  As shown in FIGS. 2 and 8, the extended intersection end portion 75 has a corner 76 formed at the ends thereof continuously curved, and has a lower frame portion (rear lower frame portion 33) and a vertical frame portion (rear vertical portion). When viewed from the side of the vehicle body 12, it overlaps with a vertical frame connecting portion 77 in which the corner formed by the frame portion 36) is curved.

The beam main body 65 has one end 81 that overlaps one end 82 in the front-rear direction of the lower reinforcing member 62.
Further, the beam extension portion 66 overlaps the other end 85 of the lower reinforcing member 62 in the front-rear direction.

Further, one end 81 of the beam main body 65 overlaps the outer surface 83 (FIG. 4) facing the outside of the vehicle 11 in one end 82 of the lower reinforcing member 62. Reference numeral 84 denotes an inner surface of the lower reinforcing member 62.
In addition, the beam extension portion 66 overlaps the outer surface 83 of the other end 85 of the lower reinforcing member 62. As a result, the load can be transmitted to the outer surfaces of both ends of the lower reinforcing member by the beam main body and the beam extending portion, and the entire lower reinforcing member can be pressed against the lower frame portion. Therefore, the load at the time of a side collision can be reliably transmitted to the lower frame part.

  One end 81 of the beam body 65 extends to a corner portion 35a (FIG. 8) formed by the center rear vertical frame portion 35 and the lower frame portion (rear lower frame portion 33) of the door opening portion (rear door opening portion 31). ing.

As shown in FIG. 3, the door (rear door 14) forms a closed cross-sectional shape with an outer panel 55 and an inner panel 54.
The beam extending portion 66 (FIGS. 3 and 6) is sandwiched between the peripheral edge portion 87 of the inner panel 54 and the peripheral edge portion 88 of the outer panel 55.

  In addition, the beam extension portion 66 has a hat-shaped cross section, the opening 91 is directed to the vehicle compartment 18, and one flange portion 93 is formed continuously with one edge 92 of the opening 91. 95, the other flange portion 96 is formed, and one flange portion 93 and the other flange portion 96 are joined to the lower reinforcing member 62 (FIG. 6).

Next, the door structure will be described in detail.
In the door structure, the door beam 61 described above includes a beam main body 65 and a beam extending portion 66.
The beam main body 65 is a flat plate in which the first groove portion 101 and the second groove portion 102 are connected in parallel and plastically processed, and one end 81 is not formed with the first groove portion 101 and the second groove portion 102.

The beam extension part 66 extends the first extension part 73 from one end 81 to the vertical frame connecting part 77 or near the first branch part 104 provided at a position of about 30% of the total length of the beam main body 65.
In addition, the second extending portion 74 is extended from the second branch portion 105 provided at the position of about 60% of the entire length of the beam main body 65 from the one end 81 to the vertical frame connecting portion 77.

As shown in FIG. 5, the first extending portion 73 is formed in a hat shape with a first wall portion 106, a second wall portion 107, and a third wall portion 108.
The hat shape of the 2nd extension part 74 is also the same.
An extending intersection end portion 75 is formed integrally with the second extending portion 74 and the first extending portion 73.

Specifically, the extended intersection end portion 75 has a substantially hat shape and extends one flange portion 93 to the lower edge 63 of the door (rear door 14).
One flange portion 93 is sandwiched between the edge of the outer panel 55 and the edge of the inner panel 54 and joined by bending (hemming) the edge of the outer panel 55.
One flange portion 93 and the other flange portion 96 are joined to the lower reinforcing member 62.

  The lower reinforcing member 62 extends from the front portion 111 to the rear portion 112 of the rear door (rear door) 14 and forms a hollow (closed cross-sectional shape) with the inner panel 54 (FIGS. 3 to 6). Reference numeral 113 denotes a hollow space.

  Specifically, the lower reinforcing member 62 is obtained by plastic processing of a steel plate, and a lap joint margin 116 is formed on the inner main body wall 115 of the inner panel 54, and the reinforcement main body 117 is connected to the lap joint margin 116. It is formed by bending almost at right angles. A lap joint margin 118 is formed continuously with the reinforcing main body 117 and joined to the inner bottom 121 that continues to the inner main body wall 115.

In order to attach the door stopper 71 to the inner bottom part 121, a stopper attaching part 122 (FIG. 7) is formed in a concave shape.
The door stopper 71 is rubber, is formed in a substantially rectangular shape, and a surface having a large area is brought into contact with the side sill 25. As a result, in the door structure, the contact area between the rear door 14 and the side sill 25 (rear lower frame portion 33) is increased, so that the impact (load) of the side collision is more reliably transmitted to the side sill 25 (rear lower frame portion 33). be able to.

Next, the operation of the door structure will be described.
A mechanism for dispersing the impact at the side collision of the door structure will be described. This will be described with reference to FIG.
FIG. 8 shows only the door beam 61 of the door structure of the rear door 14.

  In the door structure, as shown in FIGS. 3 and 8, when another vehicle 125 collides with the rear door 14 as indicated by an arrow a <b> 1, a load is input to the beam main body 65 of the door beam 61. The beam main body 65 to which the load is input transmits an impact (load) to the beam extending portion 66 as indicated by an arrow a2, and the beam extending portion 66 transmits the load to the lower reinforcing member 62 as indicated by an arrow a3. Deformation of the lower portion of the door 14 can be suppressed.

Further, when the impact (load) of the side collision is input to the beam main body 65, the impact (load) transmitted to the beam main body 65 is transmitted from the beam extension portion 66 to the lower reinforcing member 62, and the lower reinforcing member 62 transmits the load to the arrow. Disperse as a3 (see FIG. 2). As a result, the distributed load is transmitted to the inner panel 54 as indicated by an arrow a4, and the load is applied to the lower frame portion (rear lower frame portion 33) of the door opening 31 that is deformed and contacted from the inner panel 54 as indicated by an arrow a5. I can tell you.
Therefore, it is possible to prevent the load from being locally increased and the door beam 61 from coming out of the lower frame portion (rear lower frame portion 33) toward the inside of the vehicle compartment 18.

  Furthermore, when the vehicle is manufactured, the strength of the stopper mounting portion 122 is increased by the overlapping portion 67, and the mounting accuracy of the door stopper 71, in other words, the door ( There is an advantage that the accuracy of the gap between the rear door 14) and the side body 21 is increased.

  In the door structure, an impact (load) transmitted to the beam main body 65 at the time of a side collision is transmitted from the beam main body 65 to the first extension portion 73 and the second extension portion 74. For example, only the first extension portion 73 or the second extension portion is transmitted. Compared with the case of only the extension part 74, the load (stress) of the first extension part 73 and the second extension part 74 can be reduced, and the first extension part 73 and the second extension part 74 are deformed. The load input to the beam main body 65 at the time of a side collision can be more reliably transmitted to the lower reinforcing member 62.

  In the door structure, as shown in FIGS. 3 and 8, the load transmitted to the door beam 61 at the time of a side collision is transmitted from the beam extending portion 66 of the door beam 61 to the door opening 31 via the lower reinforcing member 62 and the inner panel 54. It can be transmitted to the lower frame portion (rear lower frame portion 33) as indicated by an arrow a5 and can be transmitted to the vertical frame portion (rear vertical frame portion 36) as indicated by an arrow a6.

  Further, in the door structure, when a load at the time of a side collision is input as a bending load to the beam extending portion 66, the beam extending portion 66 (the extending intersection end portion 75) has a hat shape as shown in FIG. Distribute the load as shown by arrow b1. Therefore, the strength of the beam extension 66 can be increased.

  Further, as shown in FIG. 3, the beam extension portion 66 (extension intersection end portion 75) has one flange portion 93 and the other flange portion 96 joined to the lower reinforcing member 62. Can be reliably transmitted to the lower reinforcing member 62 as indicated by the arrow b1, and the width of the opening 91 of the beam extension 66 can be prevented from being widened.

  In addition, although the door structure of this invention is employ | adopted as the rear door in embodiment, it is employable also as the front door of a vehicle.

  The door structure of the present invention is suitable for a vehicle rear door.

  DESCRIPTION OF SYMBOLS 14 ... Door (rear door), 18 ... Car compartment, 21 ... Side body, 31 ... Door opening part (rear door opening part), 33 ... Lower frame part (rear lower frame part) of door opening part, 36 ... Vertical frame Part (rear vertical frame part), 54 ... inner panel, 55 ... outer panel, 61 ... door beam, 62 ... lower reinforcing member, 63 ... lower edge of door, 65 ... beam body, 66 ... beam extension part, 67 ... overlapping part , 68 ... lower part of door, 71 ... door stopper, 73 ... first extension part, 74 ... second extension part, 75 ... extension crossing end part, 77 ... vertical frame connecting part, 81 ... one end of the beam body, 82 ... One end of the lower reinforcing member, 85 ... The other end of the lower reinforcing member, 87 ... The peripheral edge of the inner panel, 88 ... The peripheral edge of the outer panel, 91 ... The opening of the beam extension, 92 ... One edge of the opening, 93 ... One flange portion, 95 ... the other edge of the opening, 96 ... the other flange portion, B Wrap amount.

Claims (8)

In the door structure in which the door beam is provided inside the door attached to the door opening of the side body forming the side wall of the passenger compartment,
A lower reinforcing member inside the door;
The lower reinforcing member is provided along the lower edge of the door, and is disposed on the lower frame portion of the door opening portion so as to overlap in a vehicle side view,
The door structure includes a beam main body extending in the front-rear direction and a beam extending portion extending from the beam main body to reach the lower reinforcing member and overlapping.   The door structure according to claim 1, wherein the beam extending portion is provided outside the vehicle with respect to the lower reinforcing member.   The door stopper is provided in the lower part of the door which arranges the overlap part which piled up the beam extension part and the lower reinforcement member, and contacts the lower frame part in the state where the door was closed. The door structure according to claim 1 or claim 2. The beam extension part includes a first extension part extending from the beam body, a second extension part extending from the beam body toward the tip of the first extension part, and the first extension. An extended intersection end portion in which the leading end of the protruding portion and the second extending portion are continuously integrated, and
The door structure according to any one of claims 1 to 3, wherein the extended intersection end portion overlaps the lower reinforcing member. The first extension portion overlaps the lower frame portion of the door opening in a vehicle side view,
The second extension portion overlaps with a vertical frame portion that is continuous with the lower frame portion of the door opening in a vehicle side view,
The extending intersection end portion is formed by connecting the corners formed between the tips in a curved shape, and connecting the vertical frame connecting portion formed in the curved shape with the corner formed by the lower frame portion and the vertical frame portion, The door structure according to claim 4, wherein the door structure is overlapped in a side view of the vehicle body. One end of the beam body overlaps one end in the front-rear direction of the lower reinforcing member,
The door structure according to any one of claims 1 to 5, wherein the beam extension part overlaps the other end of the lower reinforcing member in the front-rear direction. The door forms a closed cross-sectional shape with an outer panel and an inner panel,
The door structure according to any one of claims 1 to 6, wherein the beam extending part is sandwiched between a peripheral part of the inner panel and a peripheral part of the outer panel. The beam extending portion has a hat-shaped cross section, the opening is directed to the vehicle compartment, one flange portion is formed to be connected to one edge of the opening, and the other flange is connected to the other edge of the opening. Forming part,
The door structure according to any one of claims 1 to 7, wherein the one flange portion and the other flange portion are joined to the lower reinforcing member.

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