JP2004010013A - Door for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door for a vehicle with improved rigidity, durability, and impact safety. <P>SOLUTION: This door for the vehicle comprises an upper reinforcing beam 18 extending along a belt line between a door pillar 8 and a latch reinforcing member, and a pillar side joint 42 connecting the upper side reinforcing beam 18 to the door pillar 8. The pillar side joint 42 comprises a closed section part 50 formed between the pillar extension part 48 of the door pillar 8 and the outer reinforcing plate material 40 of the upper reinforcing beam 18. A hinge reinforcing member 52 of the door pillar 8 comprises a connection part 54 spot-welded to the closed section part 50. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vehicle door suitable for a cab of a vehicle such as a small truck.
[0002]
[Prior art]
A door provided in a cab of a small truck or the like is required to have not only durability against opening and closing operations but also sufficient shock absorption in preparation for an unexpected situation such as a collision accident.
For this reason, even in this type of door, a side beam as a reinforcing member is disposed inside the door body including the outer panel and the inner panel, and this side beam is disposed between the door pillar of the door and the latch reinforcing member. Extending. The door pillar and the latch reinforcing member are used for mounting the door hinge and the door latch.
[0003]
[Problems to be solved by the invention]
However, even if the vehicle door has a built-in side beam, if a large impact force is input to the door from the front in a frontal collision accident, the side beam alone cannot withstand this impact force sufficiently. There is also a possibility that buckling may occur at the center of the door.
[0004]
For this reason, the addition of further reinforcing beams is considered, in which case the reinforcing beams preferably have a closed cross section and are arranged along the belt line of the door. That is, since the belt line portion is an entrance through which the window glass is protruded and retracted, the mechanical strength thereof is relatively low, and the rigidity of the door can be increased by supplementing the insufficient strength with the reinforcing beam having the closed cross section.
[0005]
However, even if the above-described reinforcing beam is added, the impact absorption resistance of the reinforcing beam is not effectively exhibited unless the above-described impact force from the front is effectively transmitted to the rear through the reinforcing beam.
To describe this point in detail, from the front, since the impact force is first input to the door pillar via the door hinge, it is necessary to firmly connect the door pillar and the reinforcing beam. It is desired to develop a joint configuration suitable for the connection of the above.
[0006]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle door having a joint configuration suitable for coupling between a reinforcing beam and a door pillar.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a vehicle door of the present invention (Claim 1) extends along a belt line portion to form a closed cross-sectional shape, and a closure extending parallel below the upper reinforcement beam. A lower reinforcing beam having a cross-sectional shape, wherein a pillar-side joint connecting the upper reinforcing beam and the door pillar has a closed cross-section formed by the door pillar and the upper reinforcing beam in a longitudinal section of the upper reinforcing beam. On the other hand, a joint is provided on a hinge reinforcing member for reinforcing the door pillar for mounting the door hinge, and the joint extends in the longitudinal direction of the upper reinforcing beam and is joined to the closed cross section.
[0008]
According to the above-described vehicle door, the impact force input to the door pillar from the front via the door hinge is transmitted from the joint of the door pillar and the hinge reinforcing member to the closed cross-section of the pillar-side joint, and once at this closed cross-section. After being received, it is transmitted rearward via the upper reinforcing beam.
Specifically, the upper reinforcing beam is made up of an inner reinforcing plate material on the inner panel side and an outer reinforcing plate material on the outer panel side, and a closed cross section of the pillar side joint is formed by a door pillar and an outer reinforcing plate material. 2). In this case, the impact force is transmitted from the door pillar to the inner reinforcing plate, while being transmitted from the closed cross section of the pillar side joint to the outer reinforcing plate. It is desirable that the portion of the door pillar forming the closed cross section of the pillar side joint is joined to the inner reinforcing plate.
[0009]
Further, the joint of the hinge reinforcing member is spot-welded to a portion of the outer reinforcing plate material forming the closed cross-section (claim 3). In this case, the joint of the hinge reinforcing member applies an impact force to the pillar-side joint. Transfers reliably to the closed section.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows a part of a vehicle door provided in a cab of a small truck, that is, an inner panel 2 of the door body.
The inner panel 2 has a window frame 4 at an upper portion thereof, and the bottom of the window frame 4 is a belt line section 6 through which a window glass (not shown) is protruded and retracted. A door pillar 8 is attached to a front portion of the inner panel 2, and the door pillar 8 extends vertically along a front edge of the inner panel 2, and upper and lower door hinges 10 and 12 are attached to the door pillar 8. Therefore, the vehicle door is supported by the vehicle body, that is, its cab body (not shown) via the door hinges 10 and 12 so as to be openable and closable.
[0011]
On the other hand, a latch reinforcing member 14 is attached to a rear portion of the inner panel 2, and the latch reinforcing member 14 also extends vertically along the rear edge of the inner panel 2, similarly to the door pillar 8. A door latch 16 is mounted at the center of the latch reinforcing member 14 when viewed in the vertical direction, and the door latch 16 can be engaged with a striker (not shown) on the cab body side.
[0012]
The inner panel 2 is provided with an upper reinforcing beam 18, and the upper reinforcing beam 18 has, for example, a substantially rectangular closed cross-sectional shape, that is, a long box shape. More specifically, the upper reinforcing beam 18 is adjacent to the bottom of the window frame 4, that is, adjacent to the belt line portion 6, and extends along the inner panel 2 in the front-rear direction of the vehicle.
The front end of the upper stiffening beam 18 cooperates with the door pillar 8 to form a pillar joint, while the rear end cooperates with the latch stiffener 14 to form a latch joint. The pillar side joint connects the upper reinforcing beam 18 and the door pillar 8, and the latch side joint connects the upper reinforcing beam 18 and the latch reinforcing member 14, which will be described later in detail.
[0013]
Further, as shown in FIG. 1, the inner panel 2 is provided with a lower reinforcing beam 20, which is located below the upper reinforcing beam 18, and And extend in parallel. The lower reinforcing beam 20 also has a closed cross section, similar to the upper reinforcing beam 18. Specifically, the lower reinforcing beam 20 is formed of a pipe member and has a circular closed cross section.
[0014]
The front end 22 and the rear end 24 of the lower reinforcing beam 20 are respectively connected to the door pillar 8 and the latch reinforcing member 14 via a beam reinforcing member (not shown), and the door latch 16 of the latch reinforcing member 14 is shown in FIG. As can be seen, they are located between the rear ends of the upper and lower reinforcing beams 18,20.
Note that an opening 26 is formed in the inner panel 2 between the upper reinforcing beam 18 and the lower reinforcing beam 20, and this opening 26 is used not only for assembling a window regulator and the like, but also for Contributes to the weight reduction of vehicle doors.
[0015]
As shown in FIG. 2, the door pillar 8 has a hinge mounting surface 28 for mounting the door hinges 10 and 12. In FIG. 2, lines L ₁ and L ₂ indicated by alternate long and short dash lines are used to connect the upper door hinge 10. The position of the mounting hole for the connecting bolt is shown.
The door pillar 8 connects the front edge 32 of the inner panel 2 and the front edge 36 of the outer panel 34, and the outer panel 34 and the inner panel 2 constitute a door body.
[0016]
More specifically, the front edge 32 of the inner panel 2 extends to the vicinity of the hinge mounting surface 28 of the door pillar 8, and is joined to the door pillar 8 by spot welding. On the other hand, the end 37 of the door pillar 8 on the side of the outer panel 34 is folded forward, and the front edge 36 of the outer panel 34 is joined to the tip by hemming.
[0017]
As is apparent from FIG. 2, the upper reinforcing beam 18 includes an inner reinforcing plate 38 on the inner panel 2 side and an outer reinforcing plate 40 on the outer panel 34, and the inner and outer reinforcing plates 38, 40 cooperate with each other. By doing so, the above-described closed cross-sectional shape is configured.
The front ends of the inner and outer reinforcing plate members 38 and 40 are respectively joined to the door pillar 8 by spot welding, and cooperate with the door pillar 8 to form the above-described pillar joint 42.
[0018]
More specifically, the front end 44 of the inner reinforcing plate 38 is overlapped with the inner panel 2, and the front end 46 of the outer reinforcing plate 40 is connected to the surface of the door pillar 8 opposite to the hinge mounting surface 28 and the end of the door pillar 8. It is bent to stick to 37 and is superimposed on the door pillar 8. The inner and outer reinforcing plate members 40 are joined to the door pillar 8 by spot welding.
[0019]
On the other hand, the door pillar 8 integrally has an extended pillar portion 48 extending inside the upper reinforcing beam 18, that is, between the inner and outer reinforcing plate members 38 and 40. The extension pillar portion 48 once extends from the hinge attachment surface 28 along the front edge 32 of the inner panel 2, is bent along the front end portion 44 of the inner reinforcing plate 38, and comes into close contact with the front end portion 44. , Is further folded back toward the outer reinforcing plate member 40 and is in close contact with the outer reinforcing plate member 40.
[0020]
The pillar extension portions 48 are respectively joined by spot welding at the contact portions between the inner and outer reinforcing plate members 38 and 40, so that the horizontal pillar extension portions 48 and the outer reinforcing plate members 40 are connected to the upper reinforcing beam as is clear from FIG. The closed cross-section 50 is formed when viewed in the longitudinal section of FIG.
Further, a hinge reinforcing member 52 is attached to a front end portion 46 of the outer reinforcing plate member 40. The hinge reinforcing member 52, together with the front end portion 46, reinforces the hinge mounting surface 28 of the door pillar 8.
[0021]
The hinge reinforcing member 52 integrally has a joint 54 bent along the outer reinforcing plate 40, and the joint 54 extends in the longitudinal direction of the upper reinforcing beam 18 and is provided at a plurality of positions on the outer reinforcing plate 40. And are joined by spot welding.
2, the front end portion 46 of the panel reinforcing member 53 of the outer panel 34 is also joined to the front end portion 46 of the outer reinforcing plate member 40. Therefore, the front end portion 46 of the outer member 40 is And the panel reinforcing member 53.
[0022]
FIG. 3 is a view as viewed from the direction of arrow III in FIG. 2. In this view, the inner panel 2 is removed. 3, reference numerals A, B, and C provided in the extension pillar portion 48 of the door pillar 8 correspond to the respective portions A to C of the extension pillar portion 48 in FIG.
On the other hand, a latch-side joint 58 connecting the upper reinforcing beam 18 and the latch reinforcing member 14 is shown in FIG.
[0023]
As is apparent from FIG. 4, the latch reinforcing member 14 has an L-shaped cross section extending along the bent rear end of the inner panel 2, and has a mounting portion 60 used for mounting the door latch 16. The mounting portion 60 is parallel to the hinge mounting surface 28 of the door pillar 8.
The rear end of the inner panel 2 further extends from the attachment portion 60 of the latch reinforcing member 14, and the rear end 64 of the outer panel 34 is connected to the rear end 62 by hemming. The rear end of the panel reinforcing member 53 in the outer panel 34 is also joined to the inner panel 2.
[0024]
On the other hand, at the latch side joint 58, the upper reinforcing beam 18 has a rear end portion where the inner and outer reinforcing plate members 38 and 40 are overlapped with each other, and this rear end portion is located between the inner panel 2 and the latch reinforcing member. 14 is engaged with the latch reinforcing member 14 by spot welding with the holding member 14 interposed therebetween. 4, the rear end of the outer reinforcing plate 40 is longer than the rear end of the inner reinforcing plate 38 and extends along the latch reinforcing member 14.
[0025]
According to the above-described vehicle door, since the upper reinforcing beam 18 and the lower reinforcing beam 20 are respectively incorporated between the inner panel 2 and the outer panel 34, the rigidity and durability of the vehicle door can be improved. Can be. Moreover, since the upper reinforcing beam 18 extends along the belt line portion 6, the insufficient strength of the belt line portion 6 is effectively compensated for, and the strength is increased.
[0026]
When an impact force is input to the vehicle door from the front, the impact force is first received by the door pillars 8 from the upper and lower door hinges 10 and 12.
Here, paying attention to the pillar-side joint 42 connecting the door pillar 8 and the upper reinforcing beam 18, the pillar-side joint 42 is formed by the extended pillar portion 48 of the door pillar 8 and the outer reinforcing plate 40 of the upper reinforcing beam 18. Since it has the closed cross section 50 formed, the rigidity of the pillar joint 42 and the joint strength thereof are both high.
[0027]
In the pillar joint 42, the joint 54 of the hinge reinforcing member 52 overlapping the closed section 50 extends in the longitudinal direction of the upper reinforcing beam 18 and is spot-welded to the closed section 50. The bond strength between 52 and closed section 50 has also been increased. That is, spot welding exerts a large resistance to an impact force, that is, a shear force, and has high shear energy absorption.
[0028]
Therefore, even if the above-described impact force is transmitted from the door pillar 8 to the pillar-side joint 42, the pillar-side joint 42 is not collapsed by the impact force, and the impact force is transmitted to the upper reinforcing beam 18, that is, the inner reinforcing plate 38 and It can be distributed and transmitted to the outer reinforcing plate members 40 respectively.
Here, since the inner and outer reinforcing plate members 38 and 40 of the upper reinforcing beam 18 give the upper reinforcing beam 18 a rectangular closed cross section, the impact force transmitted to the upper reinforcing beam 18 is transmitted via the latch joint 58. And transmitted to the latch reinforcing member 14, and then escaped from the latch reinforcing member 14 to the cab body via the door latch 16.
[0029]
As a result, the pillar-side joint 42 can cause the upper reinforcing beam 18 to exhibit excellent shock absorption against the above-described impact force, thereby improving the collision safety of the vehicle door. That is, since the collapsing at the pillar joint 42 and the buckling at the upper reinforcing beam 18 are prevented, undesired deformation of the vehicle door is prevented, and the collision safety is improved.
[0030]
The impact force input to the door pillar 8 via the lower door latch 12 is also transmitted from the door pillar 8 to the latch reinforcing member 14 via the lower reinforcing beam 20. Needless to say, the cab is escaped to the cab body 16.
The present invention is not limited to the above-described embodiment, and various modifications are possible. For example, the upper reinforcing beam 18 may be composed of only the outer reinforcing plate 40, and in this case, a closed cross-sectional shape is formed between the outer reinforcing plate 40 and the inner panel 2.
[0031]
Further, the vehicle door of one embodiment is suitable for a cab of a small truck, but is not limited to this type of cab, and it is needless to say that the vehicle door can be similarly applied to doors of various vehicles.
[0032]
【The invention's effect】
As described above, according to the vehicle door of the present invention (claims 1 and 2), the reinforcing beam is provided vertically between the door pillar and the latch reinforcing member, while the pillar side between the upper reinforcing beam and the door pillar is provided. The joint is formed with a closed cross-section, and the joint obtained by extending the hinge reinforcing member is joined to the closed cross-section. The beam can exhibit excellent shock absorption resistance, and not only the rigidity of the vehicle door itself but also the collision safety can be enhanced.
[0033]
Further, when the closed cross section of the pillar side joint and the joint of the hinge reinforcing member are spot-welded (claim 3), the rigidity at the closed cross section can be further increased.
[Brief description of the drawings]
FIG. 1 is a diagram showing an inner panel of a vehicle door according to one embodiment.
FIG. 2 is a sectional view taken along line II-II in FIG.
FIG. 3 is an arrow view in FIG. 2 from which an inner panel is removed from a direction III.
FIG. 4 is a sectional view taken along line IV-IV in FIG.
[Explanation of symbols]
2 Inner panel 6 Belt line section 8 Door pillar 10, 12 Door hinge 14 Latch reinforcing member 16 Door latch 18 Upper reinforcing beam 20 Lower reinforcing beam 38 Inner reinforcing plate material 40 Outer reinforcing plate material 42 Pillar side joint 48 Pillar extension 50 Closed section (pillar) Extension 48 + outer reinforcing plate 40)
52 Hinge reinforcing member 54 Joint (spot welding)

Claims (3)

A door body having a belt line portion through which the window glass is protruded and retracted, which secures a storage space for the window glass between the outer panel and the inner panel,
A door pillar that is provided at a front portion of the door body and that connects the outer panel and the inner panel and is used for attaching a door hinge,
A hinge reinforcing member attached to the door pillar and reinforcing a mounting portion of the door hinge;
A latch reinforcing member provided to reinforce the inner panel at a rear portion of the door body and used for mounting a door latch;
An upper reinforcing beam extending along the belt line portion on the inner panel side and forming a closed cross-sectional shape,
A pillar-side joint that couples the upper reinforcing beam and the door pillar;
A latch-side joint coupling between the upper reinforcing beam and the latch reinforcing member;
A lower reinforcing beam provided in parallel with the lower side of the upper reinforcing beam and having a front end coupled to the door pillar and a rear end coupled to the latch reinforcing member;
The pillar-side joint has a closed cross-section formed by the door pillar and the upper reinforcing beam, as viewed in a longitudinal section of the upper reinforcing beam,
The vehicle door according to claim 1, wherein the hinge reinforcing member has a joint extending in a longitudinal direction of the upper reinforcing beam and joined to the closed cross section. The upper reinforcing beam includes an inner reinforcing plate on the inner panel side and an outer reinforcing plate on the outer panel side,
The vehicle door according to claim 1, wherein the closed cross-section is formed by the door pillar and the outer reinforcing plate. The vehicle door according to claim 2, wherein the joint portion is spot-welded to a portion of the outer reinforcing plate that forms the closed cross section.

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