JP2008239107A - Door structure for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door structure for an automobile capable of preventing movement of an entire vehicle body at the time of side collision without largely increasing cost and weight of the vehicle body. <P>SOLUTION: A reinforcement pipe 30 extended vertically and having a hollow cross section is arranged in a door mating part (a) within a front door 15, and is vertically divided into at least an upper reinforcement pipe 35 and a lower reinforcement pipe 36. A division part 30c of the upper and lower reinforcement members 35, 36 is positioned so as to face a portion in the vicinity of a seat face of a seat cushion 7b, and a bracket 40 extended toward the vehicle interior side is jointed to the division part 30c of the reinforcement pipe 30 so as to surround the division part 30c from the vehicle outer side. Front and rear flange parts (inner end parts) 40b of the bracket 40 are jointed to a door inner panel 20b so as to form a closed cross section. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is a center pillar-less type in which one door opening formed on the side of a vehicle body is opened and closed by a front door disposed at a front portion of the door opening and a rear door disposed at a rear portion. Relates to the structure of automobile doors.

  In a center pillar-less type vehicle, in order to make it easy for passengers to get on and off and load and unload luggage, one door opening is formed on the side of the vehicle body, and the door opening is opened and closed by a front door and a rear door, respectively. There is a case.

In this type of automobile, due to its structure, there is a risk that the front door and the rear door may be deformed and enter the vehicle interior side at the time of a vehicle side collision. In order to prevent such front doors and rear doors from entering the passenger compartment, a large and strong cross-section hat-like rein hose extending in the vertical direction is arranged at the door matching portion in the front door and the rear door. Therefore, the strength and rigidity of the door matching portion may be increased (for example, see Patent Document 1).
JP 2004-9975 A

  By the way, in the structure in which a large and strong door rein hose is disposed at the door mating portion of the front door and the rear door as in the conventional door structure described above, although the door deformation at the time of a side collision can be suppressed, the vehicle body weight increases. There's a problem. In particular, if the large door-in hose is placed in a light-weight small automobile, it is disadvantageous in terms of cost and weight, and the entire body may move depending on the magnitude of impact load at the time of a side collision. is there.

  The present invention has been made in view of the above-described conventional situation, and it is an object of the present invention to provide an automobile door structure capable of preventing movement of the entire vehicle body at the time of a side collision without significantly increasing cost and vehicle body weight. .

  According to the first aspect of the present invention, one door opening formed on the side of the vehicle body is opened and closed by a front door disposed at the front portion of the door opening and a rear door disposed at the rear portion. A door structure of an automobile, wherein a reinforcing member having a hollow cross section extending in the vertical direction is disposed in at least one door matching portion in the front door or the rear door, and the reinforcing member is at least an upper reinforcing member in the vertical direction. And the lower reinforcing member, the divided portions of the upper and lower reinforcing members are positioned so as to face the seat cushion in the vicinity of the seat cushion, and the divided portions are surrounded by the reinforcing member from the outside of the vehicle. A bracket extending toward the inside of the vehicle is coupled with the inner end of the bracket so as to form a closed cross section with the door inner panel.

  The invention of claim 2 is characterized in that, in claim 1, the strength and rigidity of the upper reinforcing member are set to values larger than the strength and rigidity of the lower reinforcing member.

  According to the door structure according to the present invention, the reinforcing member having a hollow cross section is arranged at the door matching portion of either the front door or the rear door. For example, by adopting a cylindrical pipe material, a conventional large door rein Compared with the case where the hose is arranged, the cost and the weight of the vehicle body can be reduced.

  A bracket extending toward the vehicle interior so as to surround the divided portion of the reinforcing member so that the divided portion between the upper reinforcing member and the lower reinforcing member of the reinforcing member faces the seat surface of the seat cushion. Since the inner end portion of the bracket is joined to the door inner panel so as to form a closed cross section, the reinforcing member is bent and deformed at the divided portion at the time of a side collision to absorb the impact load. Further, the impact load is absorbed also when a bracket coupled to the divided portion abuts against a seat cushion and pushes the cushion toward the vehicle interior side. As a result, the entire vehicle body can be prevented from moving during a side collision.

  In the invention of claim 2, since the strength and rigidity of the upper reinforcing member are made larger than those of the lower reinforcing member, it is possible to reliably induce the bending deformation at the divided portion of the lower reinforcing member at the time of a side collision. The reinforcing member can be prevented from being deformed and entering the vehicle interior.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIGS. 1 to 6 are views for explaining a door structure of an automobile according to an embodiment of the present invention. FIG. 1 is a side view of a vehicle body side portion, and FIG. 2 is a vehicle body side portion. FIG. 3 is a cross-sectional view of the front door and the rear door, and FIG. 4 is a cross-sectional view taken along the line III-III in FIG. 2. FIG. 4 is a side view of the automobile in which the front door and the rear door are arranged. 5 and 6 are schematic views showing a deformation mode of the front door at the time of a vehicle side collision.

  In the figure, reference numeral 1 denotes a center pillarless type automobile. The vehicle body 2 of the automobile 1 has a roof panel 4 disposed between upper ends of left and right side panels (vehicle body side portions) 3 and 3, and a floor panel 5 (see FIG. 5) disposed between lower ends. Thus, a front seat 7 is mounted on the front side of the floor panel 5 and a rear seat (not shown) is mounted on the rear side.

  The front seat 7 is pivoted back and forth by a seat frame 7a attached to the floor panel 5, a seat cushion 7b supported by the seat frame 7a so as to be slidable in the front-rear direction, and a hinge member 7c of the seat frame 7a. And a seat back 7d supported in a possible manner.

  The left side panel 3 is formed with one door opening 3 a that extends over substantially the entire area of the side panel 3.

  The door opening 3a is connected to the left and right outer edges of the roof panel 4 and extends in the vehicle longitudinal direction to form the upper edge of the door opening 3a, and the left and right outer edges of the floor panel 5. The rocker panel 9 that extends in the rearward direction of the vehicle and forms the lower edge of the door opening 3a, and the front ends of the rocker panel 9 and the roof rail 8 are connected in the vertical direction to the front of the door opening 3a. The front pillar 10 that forms an edge portion and the quarter pillar 11 that connects the rear end portions in the vertical direction to form the rear edge portion of the door opening 3a.

  The door opening 3a is provided with a front door 15 that opens and closes the front half of the door opening 3a and a rear door 16 that opens and closes the rear half.

  The front door 15 is supported at its front edge portion by a pair of upper and lower door hinges 17, 17 arranged on the front pillar 10 so as to be opened and closed in the vehicle width direction.

  The rear door 16 is supported by a guide rail 18 disposed on the quarter panel 11 so as to be slidable in the vehicle front-rear direction.

  The front door 15 has a structure in which outer edge portions of a door outer panel 20a and a door inner panel 20b in which a door main body 15c and a window frame portion 15d are integrally formed by press molding are coupled to each other. A window glass 22 for opening and closing the opening of the window frame portion 15d is accommodated in the door body 15c so as to be movable up and down.

  Similar to the front door 15, the rear door 16 joins the outer edge portions of the door outer panel 23a and the door inner panel 23b, in which the door main body 16c and the window frame portion 16d are integrally formed by press molding, and the inside of the door main body 16c. The window glass 25 for opening and closing the opening of the window frame portion 16d is accommodated so as to be movable up and down. A door rein hose 23d joined to the door inner panel 23b by welding is disposed in the door body 16c.

  Here, the front door 15 and the rear door 16 may be of a so-called sash door type in which a wind frame portion formed separately from the door main body portion is connected to the door main body portion.

  The rear wall 20c of the door inner panel 20b of the front door 15 and the front wall 23c of the door outer panel 23a of the rear door 16 are opposed to each other with a predetermined gap in the vehicle front-rear direction. The front end 16a of the rear door 16 is overlapped in the vehicle width direction (see FIG. 3). The overlapping portion and the facing portion serve as a door matching portion a.

  A belt line rein hose 27 extending in the front-rear direction along the belt line L is disposed in the door body 15 c of the front door 15. The front end portion and the rear end portion of the belt line rein hose 27 are coupled to the inner wall of the door inner panel 20b via sheet metal brackets 27a and 27b, respectively. When viewed from the side of the vehicle, the bracket 27a on the front side of the beltline reinhose 27 overlaps the front pillar 10 in the vehicle width direction.

  Further, an impact beam 28 extending in the front-rear direction is disposed in the door body 15c of the front door 15, and the front end portion and the rear end portion of the impact beam 28 are respectively located inside the door outer panel 20a via brackets 28a and 28b. Connected to the wall. When viewed from the side of the vehicle, the bracket 28a on the front side of the impact beam 28 is overlapped with the middle portion of the upper and lower door hinges 17 in the vehicle width direction.

  A rear impact beam 29 extending in the front-rear direction is disposed in the door body 16c of the rear door 16, and a front end portion and a rear end portion of the rear impact beam 29 are respectively disposed inside the door outer panel 23a via brackets 29a and 29b. Connected to the wall. When viewed from the side of the vehicle, the bracket 29b on the rear side of the rear impact beam 29 overlaps the quarter pillar 11 in the vehicle width direction.

  A front reinforcing pipe 30 having a hollow cross section extending in the vertical direction is disposed in the door mating portion a in the front door 15 so as to be close to the rear wall 20c of the front door 15. A rear reinforcing pipe 31 having a hollow cross section extending substantially parallel to the front reinforcing pipe 30 is disposed in the door mating portion a in the rear door 16 so as to be close to the front wall 23c of the rear door 16.

  The rear reinforcing pipe 31 is coupled to a door rein hose 23 d in the rear door 16. The upper and lower ends of the rear reinforcing pipe 31 are coupled to the inner wall of the door inner panel 23b via brackets 31a and 31b, respectively.

  When viewed from the side of the vehicle, the upper bracket 31a of the rear reinforcing pipe 31 overlaps the roof rail 8 in the vehicle width direction, and the lower bracket 31b overlaps the rocker panel 9 in the vehicle width direction. The front end of the rear impact beam 29 is connected to the lower end of the rear reinforcing pipe 31.

  The rear reinforcing pipe 31 is divided into an upper reinforcing pipe 32 and a lower reinforcing pipe 33 at an intermediate portion in the vertical direction. The divided portions 31c of the upper and lower reinforcing pipes 32 and 33 are joined by welding and located at the position facing the upper end portion of the seat back 7d of the front seat 7, in other words, above the belt line L. It is set as follows.

  The strength and rigidity of the upper reinforcing pipe 32 are set to values larger than the strength and rigidity of the lower reinforcing pipe 33. Specifically, the strength is about five times that of the lower reinforcing pipe 33 by changing the material or the plate thickness.

  The upper end and lower end of the front reinforcing pipe 30 are coupled to the inner wall of the door inner panel 20b via brackets 30a and 30b, respectively.

  When viewed from the side of the vehicle, the upper bracket 30a of the front reinforcing pipe 30 overlaps the roof rail 8 in the vehicle width direction, and the lower bracket 30b overlaps the rocker panel 9 in the vehicle width direction. The rear end portion of the impact beam 28 intersects the lower end portion of the front reinforcing pipe 30.

  The front reinforcing pipe 30 is divided into an upper reinforcing pipe 35 and a lower reinforcing pipe 36 in the vertical direction. The divided portions 30c of the upper and lower reinforcing pipes 35 and 36 are joined together by welding, and are set at a position facing the vicinity of the seat surface of the seat cushion 7b of the front seat 7. Specifically, the dividing portion 30c is positioned at substantially the same height as the seating surface of the seat cushion 7b, thereby facing the hip point of the occupant seated on the seat cushion 7b.

  The strength and rigidity of the upper reinforcing pipe 35 are set to values larger than the strength and rigidity of the lower reinforcing pipe 36. Specifically, the strength is about five times that of the lower reinforcing pipe 36 by changing the material or the plate thickness.

  A bracket 40 extending toward the vehicle inner side is disposed at the divided portion 30c of the front reinforcing pipe 30 so as to surround the divided portion 30c from the vehicle outer side.

  The bracket 40 extends in the vertical direction across the split portion 30c of the front reinforcing pipe 30 and has a substantially U-shaped cross section extending from the vehicle outer side to the front side and the rear side of the reinforcing pipe 30 so as to cover the front side and the rear side. Part 40a, and front and rear flange parts (inner end parts) 40b and 40b projecting from the inner edge of the semi-cylindrical part 40a to the front side and the rear side, respectively.

  A front reinforcing pipe 30 is joined to the semi-cylindrical portion 40a of the bracket 40 by welding. The front and rear flange portions 40b, 40b of the bracket 40 are joined to the inner wall of the door of the door inner panel 20b by welding.

  Thereby, the cylindrical closed cross-section b surrounding the said division | segmentation part 30c is formed by the bracket 40 and the door inner panel 20b. Further, at the time of a side collision, the front and rear flange portions 40b of the bracket 40 come into contact with the seat frame 7a before the reinforcing pipe 30. Although not shown, a pad made of an interior member having elasticity is stuck on the inner wall of the door inner panel 20b. When the side collision occurs, the pad accurately contacts the seat frame 7a. You will be in touch.

  As shown in FIGS. 5 and 6, when an impact force F acts on the front door 15 due to a side collision, the lower reinforcing pipe 36 of the front reinforcing pipe 30 bends to the inside of the vehicle with the split portion 30c as a break point, and The bent deformation portion abuts against the seat frame 7a and pushes the seat frame 7a toward the vehicle interior, so that impact energy is absorbed. In this case, the upper reinforcing pipe 35 enters the inside of the vehicle while maintaining a straight state with the connecting portion with the roof rail 8 as a fulcrum, and the influence on the passenger compartment is avoided.

  On the other hand, the impact force F causes the bracket 40 to abut against the seat frame 7a before the reinforcement pipe 30 to be stretched, so that the cross section of the front door 15 is avoided.

  According to the present embodiment, since the reinforcing pipe 30 having a hollow cross section extending in the vertical direction is disposed in the vicinity of the door matching portion a in the front door 15, as compared with the case where a conventional large door rein hose is disposed. Material cost and weight can be reduced. As a result, it is possible to avoid the influence on the cost and the weight of the vehicle when employed in a small vehicle having restrictions on the vehicle body width dimension and the vehicle compartment width dimension, and improve the degree of freedom in design.

  In the present embodiment, the front reinforcing pipe 30 is divided into an upper reinforcing pipe 35 and a lower reinforcing pipe 36, and the divided portions 30c of both the pipes 35 and 36 are positioned so as to face the seating surface of the seat cushion 7b. A bracket 40 extending inward of the vehicle is coupled to the 30 divided portions 30c so as to surround the divided portion 30c, and the front and rear flange portions 40b, 40b of the bracket 40 are coupled to the door inner panel 20b so as to form a closed section b. Therefore, the impact load is absorbed by the reinforcing pipe 30 being bent and deformed at the split portion 30c at the time of a side collision. The impact load is also absorbed by the bracket 40 coupled to the divided portion 30c contacting the seat frame 7a and pushing the seat cushion 7b toward the vehicle interior side. As a result, a stable deformation mode can be obtained, and the entire vehicle body can be prevented from moving during a side collision.

  Even if the bending deformation portion of the reinforcing pipe 30 extends to the vicinity of the occupant's waist, an elastic pad is attached to the inner surface of the door inner panel 20b, so that the load on the occupant is not much. Does not grow.

  In the present embodiment, since the strength and rigidity of the upper reinforcing pipe 35 are made larger than those of the lower reinforcing pipe 36, it is possible to reliably induce the bending deformation at the divided portion 30c of the lower reinforcing pipe 36 at the time of a side collision. The upper reinforcing pipe 35 can be prevented from being deformed and entering the vehicle compartment 6.

  Here, in the above embodiment, the front reinforcing pipe 30 is disposed on the front door 15, but in the present invention, the positional relationship between the front reinforcing pipe 30 and the rear reinforcing pipe 31 may be reversed. That is, the front reinforcing pipe 30 may be disposed on the rear door 16 side, and the rear reinforcing pipe 31 may be disposed on the front door 15 side. Further, the front reinforcing pipe 30 may be disposed on both the front door 15 and the rear door 16.

  In the above embodiment, the rear door 16 is slidable in the front-rear direction. However, the present invention may be a so-called double door type in which the rear door is pivotally supported by a quarter pillar and opened and closed with the front door in the vehicle width direction. Good.

It is a side view of the vehicle body side part of the motor vehicle by one Embodiment of this invention. It is a side view of the front door and rear door which are arrange | positioned at the said vehicle body side part. FIG. 3 is a cross-sectional view (cross-sectional view taken along the line III-III in FIG. 2) of the door alignment portion of the front door and rear door. It is a side view of the automobile in which the front door and the rear door are arranged. It is a schematic diagram which shows the deformation | transformation mode of the front door at the time of a vehicle side collision. It is a schematic diagram which shows the deformation | transformation mode of the front door at the time of a vehicle side collision.

Explanation of symbols

1 Car 3 Side panel (vehicle side)
3a Door opening 7b Seat cushion 15 Front door 16 Rear door 20b Door inner panel 30 Front reinforcing pipe (reinforcing member)
30c Dividing part 35 Upper reinforcement pipe (upper reinforcement member)
36 Lower reinforcement pipe (lower reinforcement member)
40 Bracket 40b Front and rear flanges (inner end)
a Door matching part b Closed section

Claims (2)

A door structure of an automobile in which one door opening formed on a side part of a vehicle body is opened and closed by a front door disposed at a front portion of the door opening and a rear door disposed at a rear portion. ,
A reinforcing member having a hollow cross section extending in the up-down direction is disposed on at least one door mating portion in the front door or the rear door,
The reinforcing member is divided into at least an upper reinforcing member and a lower reinforcing member in the vertical direction, and the divided portions of the upper and lower reinforcing members are positioned so as to face the seat cushion in the vicinity of the seat cushion,
A bracket extending toward the vehicle interior is coupled to the divided portion of the reinforcing member so as to surround the divided portion from the vehicle outer side, and an inner end portion of the bracket is coupled to the door inner panel so as to form a closed cross section. Automobile door structure. 2. The door structure for an automobile according to claim 1, wherein the strength and rigidity of the upper reinforcing member are set to be larger than the strength and rigidity of the lower reinforcing member.

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