JP2007253801A - Vehicular door structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular door structure which improves the airtightness of the vehicle interior and reduces the weight of a door. <P>SOLUTION: A window frame member 13 is joined to a door panel member 12 to construct the vehicular door structure, which has an superposed portion 20 where the lower end of the window frame member 13 and the upper end of the door panel member 12 are superposed and joined to each other. The superposed portion 20 has a hollow closed sectional shape, and a closed sectional portion 26 that extends longitudinally at the lower end of the window frame member 13 and the upper end of the door panel member 12. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle door structure.

Conventionally, various techniques have been developed to improve the productivity of doors used in vehicles. As one of such techniques, there is a method of forming a door by pressing a plate material.
However, in the case where the door is formed by pressing one plate material, there is a problem that a large press working device is required and fine processing is difficult.

  In order to solve such a problem, there is a case where a method of forming a door by pressing a plurality of plate materials may be adopted, but according to this method, it is difficult to secure the necessary rigidity for the door. There are challenges. For this reason, in the method of forming a door using a plurality of press-worked members, when a method for ensuring the rigidity required for the door is provided by providing various reinforcing members for the formed door There are many.

As an example of a technique for forming a door by pressing a plurality of plate materials, there is a technique disclosed in Patent Document 1 below.
JP 2003-72375 A

However, as disclosed in Patent Document 1, in order to perform press working using many plate materials, many welding processes are required, so an increase in the number of work steps is unavoidable, resulting in an increase in cost. I will invite you.
Moreover, in the technique of this patent document 1, although the board | plate material of various board thickness is used, the time and expense which are required in order to procure such a plurality of types of board | plate materials cannot be ignored.

  Moreover, in the technique of this patent document 1, it is set as the structure which makes plate | board thickness of the board | plate material used for the lower frame of a sash thinner than another board | plate material (for example, refer FIG. 12 of patent document 1), and the weight increase of the whole sash is carried out. While aiming to increase the required rigidity while suppressing, with such a configuration, it is practically very difficult to obtain the rigidity required for the sash (sash rigidity).

  Also, when the vehicle is running, negative pressure due to atmospheric flow acts on the window supported by the sash, and the sash will be pulled to the outside of the vehicle together with the window, so if sufficient sash rigidity cannot be obtained, The sash is displaced to the outside of the vehicle, and a gap is generated between the sash and the vehicle body, so that the airtightness of the passenger compartment is lost. Furthermore, the negative pressure acting on the window and the sash increases as the vehicle speed increases.

Therefore, in the technique of Patent Document 1, there arises a problem that the airtightness of the passenger compartment decreases, and this phenomenon becomes more remarkable during high-speed traveling.
The present invention has been devised in view of such problems, and an object of the present invention is to provide a vehicle door structure that can reduce the weight of the door while improving the airtightness in the vehicle.

  In order to achieve the above object, a vehicle door structure according to the present invention (Claim 1) is a vehicle door structure in which a window frame member and a door panel member are joined to each other. The overlap portion has a lower end portion and an upper end portion of the door panel member which are overlapped and joined, and the overlap portion is formed in a hollow closed cross section and the lower end portion of the window frame member and the door panel The upper end portion of the member has a closed cross-sectional portion extending in the longitudinal direction.

According to a second aspect of the present invention, there is provided the structure of the vehicle door according to the first aspect, wherein the upper end portion of the door panel member is raised on the side opposite to the overlapped window frame member. One raised portion is formed, and the first raised portion is formed to extend in the longitudinal direction of the upper end portion of the door panel member.
According to a third aspect of the present invention, there is provided the structure of the vehicle door according to the first or second aspect, wherein the lower end portion of the window frame member is raised on the side opposite to the door panel member that is overlaid. The second raised portion is formed, and the second raised portion is formed to extend in the longitudinal direction of the lower end portion of the window frame member.

According to a fourth aspect of the present invention, there is provided the vehicle door structure according to any one of the first to third aspects, wherein the door panel member is molded by pressing a first plate material, and the window The frame member is formed by press-working a second plate material that is thicker than the first plate material.
According to a fifth aspect of the present invention, there is provided the vehicle door structure according to the first or second aspect, wherein the front side panel connecting the front end portion of the window frame member and the front end portion of the door panel member; A rear side panel that connects a rear end portion of the window frame member and a rear end portion of the door panel member, and a reinforcing member that connects the window frame member, the door panel, and the side panel. Yes.

According to the structure of the vehicle door of the present invention, it is possible to reduce the weight of the door while increasing the rigidity of the door and improving the airtightness in the vehicle. (Claim 1)
Moreover, a hollow cross-section having a hollow closed cross-sectional shape can be easily formed. (Claims 2 and 3)
In addition, by making the plate thickness of the window frame member (second plate) thicker than the plate thickness of the door panel member (first plate), the door hermeticity is ensured by ensuring the rigidity balance of the entire door. It is possible to reduce the weight of the door while increasing the weight. (Claim 4)
Moreover, the rigidity of the whole door can further be improved by providing the front side panel, the front side panel, and the reinforcing member. (Claim 5)

Hereinafter, the structure of a vehicle door according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic perspective view showing the overall configuration, and FIG. 2 is a schematic view showing a door in a vertically divided state. FIG. 3 is a schematic III-III cross-sectional view of FIG. 1, with some components omitted.
The door 10 shown in FIGS. 1 and 2 is provided on the left side of a vehicle (not shown). Moreover, in FIG. 1 and FIG. 2, only the vehicle inner side part (namely, door inner 11) has shown the state seen from the left outer side of the vehicle. Of the door inner 11, the front side of the sheet of FIG. 1 and FIG. 2 is referred to as “vehicle outside”, and the back side of the sheet is referred to as “vehicle inside”.

The door inner 11 is mainly composed of a door inner panel 12 and an inner sash 13.
Among these, the door inner panel 12 is a panel which forms the lower part of the door inner 11, Comprising: It forms by pressing the steel plate material which is not shown in figure. In the present embodiment, an example of a steel plate material will be described. However, an aluminum plate material may be used, and any plate material may be used as long as it can be pressed.

  Further, the door inner panel 12 includes a recessed portion 14 that is recessed toward the inside of the vehicle, a front wall portion 15 that is a wall portion formed on the front side of the recessed portion 14 and extends in the vertical direction, and a lower portion of the recessed portion 14. A lower wall portion 16 that is a wall portion that is formed on the side and extends in the front-rear direction (longitudinal direction), a rear wall portion 17 that is a wall portion that is formed on the rear side of the recess portion 14 and extends in the vertical direction, An arcuate wall portion 29 that is a wall portion that connects the wall portion 16 and the rear wall portion 17 and extends in an arc shape is integrally formed.

  On the other hand, the inner sash 13 is a frame member formed by pressing a steel plate material (not shown), and includes a lower frame member 18 fixed to the door inner panel 12 by welding, and a front end portion of the lower frame member 18. An upper frame member 19 extending in a circular arc from the rear to the rear, and a rear frame member 21 connecting the rear end portion of the upper frame member 19 and the rear end portion of the lower frame member 18 and extending in the vertical direction. Is formed.

Further, a second plate material (not shown), which is a steel plate material whose thickness is thicker than a first plate material (not shown) which is a steel plate material used for press working of the door inner panel 12, forms the inner sash 13. It is used for press working.
The upper end portion of the door inner panel 12 and the lower end portion of the inner sash 13 are overlapped and joined to each other. In addition, the part which the upper end part of these door inner panels 12 and the lower end part of the inner sash 13 overlaps is called the superposition | polymerization part 20, and this superposition | polymerization part 20 is shown with a mesh in FIG.

Further, in this overlapping portion 20, as shown in FIG. 3, the upper end portion of the door inner panel 12 bulges on the opposite side to the superimposed inner sash 13 (that is, the vehicle inner side) and the front-rear direction of the door 10 A panel raised portion (first raised portion) 22 is formed.
In addition, a sash bulge (second bulge) that bulges on the lower side of the inner sash 13 to the opposite side of the overlapped door inner panel 12 (that is, the vehicle outer side) and extends in the front-rear direction of the door 10. 23 is formed.

The peripheral portion (panel raised peripheral portion) 24 of the panel raised portion 22 and the peripheral portion (sash raised peripheral portion) 25 of the sash raised portion 23 are joined to each other by spot welding.
The panel raised portion 22 and the sash raised portion 23 are arranged to face each other, thereby forming a hollow cross-sectional portion 26 having a hollow closed cross-sectional shape and extending in the front-rear direction of the vehicle.

  As shown in FIG. 1, the door inner 11 is provided with a front side panel (side panel) 27. The front side panel 27 includes front end portions of the upper frame member 19 and the lower frame member 18 of the inner sash 13, a front wall portion 15 of the door inner panel 12, and a portion of the recess portion 14 that is close to the front wall portion 15. Are joined by welding to reinforce the rigidity of the door 10.

Further, the door inner 11 is also provided with a rear side panel (not shown; side panel). The rear side panel is welded to the rear end portion of the lower frame member 18 of the inner sash 13, the rear wall portion 17 of the door inner panel 12, and a portion of the recessed portion 14 adjacent to the rear wall portion 17. And the rigidity of the door 10 is further strengthened.
Further, the door inner 11 is provided with a beltline outer reinforcement (reinforce) 28 which is a reinforcing member so that the rigidity of the door 10 can be further enhanced.

The reinforcement 28 is formed of a reinforcement body 28A formed extending in the front-rear direction of the door 10 and a reinforcement projecting portion 28B formed so as to protrude upward from the front end portion of the reinforcement body 28A. ing.
Among these, the reinforcement main body 28A is welded to the inner sash 13 and the door inner panel 12 as shown in FIG.

Although the cross section is not shown, the front end portion of the reinforcement main body 28A is overlaid on the front side panel 27, and the front side panel 27 is overlaid on the door inner panel 12. And the front end part of these reinforcement main bodies 28A, the front side panel 27, and the door inner panel 12 are integrally fixed by the rivet.
Similarly, although the cross section is not shown, the rear end portion of the reinforcement main body 28A is overlaid on the rear side panel (not shown), and the rear side panel is overlaid on the door inner panel 12. Yes. The rear end portion, the rear side panel, and the door inner panel 12 of the reinforcement main body 28A are integrally fixed by rivets.

On the other hand, the reinforcement projecting portion 28B is overlaid on the front side panel 27, and the front side panel 27 is overlaid on the front end portion of the upper frame member 19 of the inner sash 13 (not shown). The reinforcement projecting portion 28B, the front side panel 27, and the upper frame member 19 are integrally fixed by rivets.
Since the structure of the vehicle door according to the embodiment of the present invention is configured as described above, the following operations and effects are achieved.

  The overlapping portion 20 formed by overlapping and joining the lower end portion of the inner sash 13 molded by pressing and the upper end portion of the door inner panel 12 molded by pressing is formed in a hollow closed cross-sectional shape and Since it has the closed cross-sectional part 26 extended in the longitudinal direction of the lower end part of the inner sash 13 and the upper end part of the door inner panel 12, the rigidity of the door 10 used for a vehicle can be improved significantly.

And the rigidity of this door 10 increases, so that the airtightness in the vehicle can be enhanced.
That is, when the vehicle is traveling, a negative pressure due to atmospheric flow acts on a window (not shown) supported by the inner sash 13, and the inner sash 13 is pulled to the outside of the vehicle together with the window.
For this reason, when the inner sash does not have sufficient rigidity as in the prior art, the inner sash is deformed to the outside of the vehicle, and a gap is formed between the door and the vehicle body, so that the airtightness of the passenger compartment is improved. It can happen to be lost. Further, as the vehicle speed increases, the negative pressure acting on the window and the sash increases, so that the airtightness can be more significantly reduced.

On the other hand, according to the present invention related to the present embodiment, the rigidity of the door 10 (particularly, the rigidity of the inner sash 13) can be increased, so that the airtightness in the vehicle can be increased.
Further, the door inner 11 is provided with a reinforcement 28 as a reinforcing member to further increase the rigidity of the door 10, but the closed section 26 of the overlapping portion 20 improves the basic rigidity of the door 10. Therefore, the rigidity required for the reinforcement 28 may be lower than that of a reinforcing member used for a conventional door.

In addition, since a lightweight material can be used for the reinforcement 28, the weight can be reduced.
Moreover, the hollow cross-sectional part 26 can be easily formed using press work by forming so that the panel protruding part 22 may extend in the front-back direction in the upper end part of the door inner panel 12. FIG.

Similarly, by forming the sash bulge portion 23 so as to extend in the front-rear direction at the lower end portion of the inner sash 13, the hollow cross-sectional portion 26 can be easily formed using press working.
Moreover, while ensuring the rigidity balance of the door 10 whole by making the plate | board thickness of the steel plate material used for press molding of the inner sash 13 thicker than the plate | board thickness of the steel plate material used for press molding of the door inner panel 12. The door 10 can be reduced in weight.

The door inner 11 includes a front side panel 27 that connects the front end of the inner sash 13 and the front end of the door inner panel 12, and the rear end of the inner sash 13 and the rear end of the door inner panel 12. Since the rear side panel (not shown) to be connected is provided, the rigidity of the entire door 10 can be further increased.
Further, in a state where the front end portion of the reinforcement body 28A, the front side panel 27 and the door inner panel 12 are overlapped, these are integrally fixed with rivets, and the rear end portion and the rear side of the reinforcement body 28A are fixed. In a state where the panel and the door inner panel 12 are overlapped, they are integrally fixed by rivets.

Further, in a state where the reinforcement projecting portion 28B, the front side panel 27, and the upper frame member 19 are overlapped, these are integrally fixed by rivets.
By adopting such a configuration, it is possible to increase the rigidity of the door 10 (particularly, the rigidity of the inner sash 13) while preventing the rivet fixing portion from becoming too thick and avoiding poor fastening due to the rivet. .

  In the above-described embodiment, the door 10 is described as an example provided on the left side of the vehicle, but is not limited thereto. For example, it may be a door provided on the right side of the vehicle or a door (so-called back door) provided at the rear end of the vehicle.

It is a typical perspective view showing the whole structure of the structure of the door for vehicles concerning one embodiment of the present invention. It is a typical perspective view showing the important section composition of the structure of the door for vehicles concerning one embodiment of the present invention, and shows the state divided up and down. It is typical sectional drawing which shows the principal part of the structure of the vehicle door which concerns on one Embodiment of this invention.

Explanation of symbols

13 Inner sash (window frame member)
12 Door inner panel (door panel member)
20 superposition part 26 closed cross-section part 22 panel raised part (first raised part)
23 Sash bump (second bump)
27 Front side panel (front side panel),
28 Beltline outer ring force (reinforcement member)

Claims (5)

A structure of a vehicle door configured by joining a window frame member and a door panel member,
Having a superposed portion in which the lower end portion of the window frame member and the upper end portion of the door panel member are overlapped and joined;
The overlapped portion has a closed cross-section that is formed in a hollow closed cross-sectional shape and that extends in the longitudinal direction at the lower end of the window frame member and the upper end of the door panel member, The structure of a vehicle door. At the upper end of the door panel member is formed a first raised portion that is raised on the side opposite to the overlapped window frame member,
The vehicle door structure according to claim 1, wherein the first raised portion is formed to extend in a longitudinal direction of the upper end portion of the door panel member. A second raised portion is formed at the lower end of the window frame member and is raised on the opposite side of the overlapped door panel member.
The vehicle door structure according to claim 1 or 2, wherein the second raised portion is formed to extend in a longitudinal direction of the lower end portion of the window frame member. The door panel member is molded by pressing the first plate material,
The structure of the vehicle door according to any one of claims 1 to 3, wherein the window frame member is formed by pressing a second plate material having a thickness greater than that of the first plate material. . A front side panel connecting the front end of the window frame member and the front end of the door panel member;
A rear side panel connecting the rear end of the window frame member and the rear end of the door panel member;
The structure of a vehicle door according to any one of claims 1 to 4, further comprising a reinforcing member that connects the window frame member, the door panel, and the side panel.

Images