JP3672032B2 - Vehicle door - Google Patents

Description

[0001]
BACKGROUND 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]
Doors provided in cabs such as small trucks are required not only to have durability against opening and closing operations but also to have sufficient shock absorption in preparation for unexpected situations such as collision accidents.
For this reason, even in this type of door, a reinforcing beam as a reinforcing member is disposed in the door body composed of the outer panel and the inner panel, and this reinforcing beam is provided between the door pillar of the door and the latch reinforcing member. It extends. The door pillar and the latch reinforcing member are used for attaching the door hinge and the door latch. The vehicle door is supported by the cab body through the door hinge so as to be openable and closable, and the door latch is engaged with the striker of the cab body. It is possible.
[0003]
[Problems to be solved by the invention]
However, even if the reinforcing beam is built in the vehicle door, if the coupling between the front end of the reinforcing beam and the door pillar is not appropriate, the impact force from the front via the door hinge is caused by a frontal collision accident or the like. If the joint between the door pillar and the reinforcing beam is crushed or disengaged due to the impact force when it is input to the reinforcing beam, it will effectively exert its original function, that is, the transmission and absorption function for impact input. I can't let you.
[0004]
Therefore, it has been desired to develop a joint structure suitable for connecting the door pillar and the reinforcing beam.
The present invention has been made based on the above circumstances, and an object thereof is to provide a vehicle door having a joint configuration suitable for coupling between a reinforcing beam and a door pillar.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, a vehicle door according to the present invention (Claim 1) includes a door pillar connecting the outer panel and the inner panel at the front portion of the door body including the outer panel and the inner panel, and the door pillar. an outer coupling portion that is formed integrally, extending from the outer edge of the hinge mounting surface facing forward of the door body and the hinge mounting surface in front of the door body, the front edge of the outer panel is coupled by tip, the door body The rear panel is provided to reinforce the inner panel and is used to attach the door latch. The latch reinforcing member is provided on the inner panel side and extends between the door pillar and the latch reinforcing member along the inner panel. a reinforcing beam has a cross-sectional shape, and a front joint for coupling between the front end of the door pillar and the reinforcing beam, the rear end a latch reinforcement reinforcing beam And a rear joint for coupling between the timber and the front joint, the beam reinforcement section for reinforcing the door pillar is stuck on a surface opposite to the hinge mounting surface of the door pillar, the inner edge of the beam reinforcement section A beam-side joint that extends integrally rearward and overlaps with the front end of the reinforcing beam, and is connected to each other by spot welding, and extends integrally forward from the outer edge of the beam reinforcing portion and overlaps with the outer coupling portion of the door pillar. Pillar-side joints connected to each other by spot welding , and the rear joint extends in the longitudinal direction of the reinforcing beam and is overlapped with each of the rear end of the reinforcing beam and the latch reinforcing member, and It consists of a beam reinforcement member connected to the end and the latch reinforcement member by spot welding .
[0006]
According to the vehicle door described above, the impact force input from the front to the door pillar via the door hinge is first received by the door pillar, then transmitted from the door pillar to the reinforcing beam via the front joint , and further from the reinforcing beam. It is transmitted to the latch reinforcing member via the rear joint, and escaped from the latch reinforcing member to the cab body via the door latch.
[0007]
Here, since the front joint is not only the beam reinforcing part that reinforces the hinge mounting surface of the door pillar , but also the pillar side joint part is overlapped with the outer joint part of the door pillar, the beam reinforcing part and the pillar side joint part for the door pillar Overlapping increases the rigidity of the front joint. Therefore, since the front joint also serves as a reinforcing member for the hinge mounting surface, the number of parts and assembly man-hours required for the vehicle door are reduced.
Further, between the outer coupling portion and the pillar-side joining portion are connected to each other by spot welding receiving the impact force as a shearing force, moreover, also between the front end of the reinforcing beam and the beam-side joint portion of the beam reinforcement section also Since they are connected to each other by spot welding that receives the impact force as a shearing force, when the impact force is transmitted from the door pillar to the reinforcing beam through the beam reinforcement portion and the beam side joint portion of the front joint , the impact force is It is absorbed at each spot weld.
Further, after this, the impact force is transmitted from the reinforcement beam to the latch reinforcement member via the rear joint, but the impact force is also sheared between the rear joint (that is, the beam reinforcement member) and the latch reinforcement member. Since they are connected to each other by spot welding as a force, they are also absorbed by the spot weld.
[0008]
The vehicle door is preferably provided with a panel reinforcing member that is provided on the outer panel side and extends along the outer panel. The panel reinforcing member sandwiches the pillar-side joint portion with the outer coupling portion. It has a front end part joined to the pillar side joint part and a rear end joined to the inner panel.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a part of a vehicle door provided in a cab of a light truck, that is, an inner panel 2 of the door body.
The inner panel 2 has a window frame 4 at the upper portion thereof, and the bottom of the window frame 4 is a belt line portion 6 into which a window glass (not shown) protrudes and sinks. A door pillar 8 is attached to the front portion of the inner panel 2. The door pillar 8 extends vertically along the front edge of the inner panel 2, and the upper and lower door hinges 10, 12 are attached to the door pillar 8. Therefore, the vehicle door is supported by the vehicle body, that is, the cab body (not shown) via the door hinges 10 and 12 so as to be freely opened and closed.
[0010]
On the other hand, a latch reinforcing member 14 is attached to the rear portion of the inner panel 2, and this latch reinforcing member 14 also extends vertically along the rear edge of the inner panel 2, as with the door pillar 8. The latch reinforcing member 14 is provided with a door latch 16 at the center when viewed in the vertical direction. The door latch 16 can be engaged with a striker (not shown) on the cab body side.
[0011]
A reinforcing beam 20 extends under the inner panel 2 between the door pillar 8 and the latch reinforcing member 14, and the reinforcing beam 20 has a closed cross section. Specifically, the reinforcing beam 20 is made of a pipe member and has a circular closed cross section.
The front end portion 22 and the rear end portion 24 of the reinforcing beam 20 are respectively coupled to the door pillar 8 and the latch reinforcing member 14 via a beam reinforcing member described later.
[0012]
Further, an auxiliary beam 18 is additionally provided on the upper portion of the inner panel 2. The auxiliary beam 18 also extends between the door pillar 8 and the latch reinforcing member 14 and has a substantially rectangular closed cross-sectional shape. More specifically, the auxiliary beam 18 is disposed adjacent to the belt line portion 6 of the window frame 4 to reinforce the belt line portion 6 and, as is apparent from FIG. 1, the auxiliary beam 20 and the auxiliary beam. 18 extend parallel to each other.
[0013]
The door latch 16 of the latch reinforcing member 14 is positioned between the rear end portions of the auxiliary beam 18 and the reinforcing beam 20. Further, the inner panel 2 is formed with an opening 26 located between the auxiliary beam 18 and the reinforcing beam 20, and this opening 26 is not only used for assembling a window regulator or the like, but also for vehicles. Contributes to lighter doors.
[0014]
As shown in FIG. 2, the door pillar 8 has a hinge mounting surface 28 for mounting the door hinges 10, 12. In FIG. 2, the lines L ₁ and L ₂ indicated by alternate long and short dash lines are used for connecting the lower door hinge 12. This shows the mounting hole position of the connecting bolt.
The door pillar 8 connects between 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.
[0015]
More specifically, the front edge 32 of the inner panel 2 extends along the door pillar 8 to the vicinity of the hinge mounting surface 28, and is joined to the door pillar 8 by spot welding. On the other hand, in the door pillar 8, an outer coupling portion 37 on the outer panel 34 side is bent forward, and a front edge 36 of the outer panel 34 is coupled to the front end thereof by hemming.
[0016]
As apparent from FIG. 2, the front end 22 of the reinforcing beam 20 and the door pillar 8 are connected to each other via a front joint 40, and the front joint 40 includes a beam reinforcing member 42.
The beam reinforcing member 42 is attached to the surface of the door pillar 8 opposite to the hinge mounting surface 28, and reinforces the hinge mounting surface 28, that is, the door pillar 8 at that portion. The beam reinforcing member 42 has a beam side joint portion 44 that extends integrally in the longitudinal direction of the reinforcing beam 20. The beam side joint portion 44 is overlapped with the front end 22 of the reinforcing beam 20, and is spotted at a plurality of spots. They are connected to each other by welding.
[0017]
Further, the beam reinforcing member 42 integrally has a pillar side joint portion 46 bent along the outer joint portion 37 of the door pillar 8 and is superposed on the outer joint portion 37 that is also the pillar side joint portion 46. Thus, they are connected to each other by spot welding at a plurality of locations.
As is clear from FIG. 2, the front end portion 56 of the panel reinforcing member 54 in the outer panel 34 is also joined to the pillar side joint portion 46 of the beam reinforcing member 42, and thus the pillar side joint portion 46 is joined to the door pillar 8. The outer coupling portion 37 and the panel reinforcing member 54 are in a state of being sandwiched.
[0018]
3 shows an arrow view from the direction III in FIG. 2, and the inner panel 2 is removed in the arrow view. As is apparent from FIG. 3, the beam-side joining portion 44 of the beam reinforcing member 42 has a receiving portion 44a having a groove shape at its tip, and the front end 22 of the reinforcing beam 20 is partially fitted into the receiving portion 44a. In a combined state.
As apparent from FIG. 4, the latch reinforcing member 14 extends along the bent rear end portion of the inner panel 2 and has a latch 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.
[0019]
The rear end portion of the inner panel 2 further extends from the latch mounting portion 60 of the latch reinforcing member 14, and the rear end 64 of the outer panel 34 is coupled to the rear end 62 by hemming. The rear end of the panel reinforcing member 54 in the outer panel 34 is also joined to the inner panel 2.
On the other hand, the rear end 24 of the reinforcing beam 20 and the latch reinforcing member 14 are coupled to each other via a rear joint 66, and the rear joint 66 includes a beam reinforcing member 68. The beam reinforcing member 68 extends substantially in the longitudinal direction of the reinforcing beam 20, and is connected to each other by spot welding with its front end 70 superimposed on the rear end 24 of the reinforcing beam 20. Further, in a state of being superimposed on the latch reinforcing member 14, they are connected to each other by spot welding.
[0020]
In addition, FIG. 5 shows the arrow view from the V direction in FIG. 4, and the inner panel 2 is removed also in this arrow view. Further, as schematically shown in FIG. 5, the front end portion 70 of the beam reinforcing member 68 is also formed with a groove-shaped receiving portion 70a into which the rear end 24 of the reinforcing beam 20 can be partially fitted. Yes.
According to the vehicle door described above, when an impact force from the front is input, the impact force is first received by the door pillar 8 from the upper and lower door hinges 10 and 12.
[0021]
Here, paying attention to the front joint 40 that couples the door pillar 8 and the reinforcing beam 20, the front joint 40 includes the beam reinforcing member 42 that integrally includes the beam side joint portion 44 and the pillar side joint portion 46 described above. Therefore, the impact force input to the door pillar 8 is reliably transmitted to the reinforcing beam 20 via the front joint 40.
[0022]
That is, the pillar-side joint 46 is spot-welded to each other in a state of being superimposed on the outer joint portion 37 of the door pillar 8, and the beam-side joint 44 is also spot-welded in a state of being superimposed on the front end portion 22 of the reinforcing beam 20. Therefore, both the pillar side joint portion 46 and the beam side joint portion 44 extend in the longitudinal direction of the reinforcing beam 20, and the impact force described above is applied to the spot weld as a shearing force.
[0023]
The spot welded portion is strong against such a shearing force and is excellent in shear energy absorption, and the pillar-side joint portion 46 also increases the rigidity of the door pillar 8 itself. Therefore, the impact force input to the door pillar 8 is surely applied to the reinforcing beam 20 through the front joint 40 without causing the door pillar 8 and the front joint 40 to be crushed or to be detached from the door pillar 8 and the reinforcing beam 20. At this time, a part of the impact force is absorbed by the spot welded portion of the front joint 40.
[0024]
Thereafter, the impact force transmitted to the reinforcing beam 20 in this way is transmitted from the reinforcing beam 20 to the latch reinforcing member 14 via the rear joint 66, that is, the beam reinforcing member 68. 68 also has its front end 70 and rear end 72 extending in the longitudinal direction of the reinforcing beam 20, and is spot welded to the rear end 24 of the reinforcing beam 20 and the latch reinforcing member 14, respectively. Similarly, the bonding strength is high and the absorption of shear energy is also excellent. Therefore, the impact force is reliably transmitted from the beam reinforcing member 68 to the latch reinforcing member 14 and then transmitted from the latch reinforcing member 14 to the cab body via the door latch 16.
[0025]
As a result, the impact force input to the vehicle door from the front is surely released to the cab body via the reinforcing beam 20, so that the impact resistance and absorption of the vehicle door are high and the collision safety is excellent. It will be a thing.
Furthermore, since the beam reinforcing member 42 also functions as a reinforcing member for the hinge mounting surface 28, it is possible to reduce the number of parts and assembly man-hours for the vehicle door.
[0026]
Further, in the vehicle door of the above-described embodiment, since the auxiliary beam 18 having a substantially rectangular closed cross-sectional shape is also provided in addition to the reinforcing beam 20, the rigidity of the vehicle door is further increased, and the auxiliary beam is further increased. 18 can effectively compensate for the insufficient strength of the belt line portion 6. As a result, the collision safety of the vehicle door is further improved.
The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, although the vehicle door of one embodiment is suitable for a cab of a small truck, it is needless to say that the vehicle door is not limited to this type of cab and can be similarly applied to various vehicle doors.
[0027]
【The invention's effect】
According to the vehicle door of the present invention as described above (claim 1), a beam reinforcement section front joint coupled between the door pillar and the reinforcing beam is attached on the door pillar, the front and rear respectively from the beam reinforcement section The pillar-side joint and the beam-side joint that extend integrally with each other, and these pillar-side and beam-side joints are connected to the outer joint of the door pillar and the reinforcing beam by spot welding in which the impact force from the front is received as a shearing force. In addition, the rear joint that connects the reinforcing beam and the latch reinforcing member also extends in the longitudinal direction of the reinforcing beam and is spot welded to overlap the reinforcing beam and the latch reinforcing member. since consist, impact spot on the front joint input from the front door pillar With its shear energy by contact portion is absorbed, it is reliably transmitted to the reinforcing beam from the front joint, after this, even when an impact force is transmitted to the latch reinforcing member reinforcing beam via the rear joint, rear The shear energy is absorbed by the spot weld at the joint. Therefore, the reinforcement beam is that Ki out is possible to give full play to its original function.
[0028]
Further, since the vehicle door of the present invention further includes a panel reinforcing member on the outer panel side (Claim 2), the panel reinforcing member has a pillar side joint portion of the front joint between the outer joint portion of the door pillar. Can be pinched .
[Brief description of the drawings]
FIG. 1 is a schematic view showing an inner panel of a vehicle door according to an embodiment.
FIG. 2 is a sectional view taken along line II-II in FIG.
FIG. 3 is an arrow view from FIG. 2 excluding the inner panel from the III direction.
4 is a cross-sectional view taken along line IV-IV in FIG.
FIG. 5 is a view taken from the direction of the arrow V in FIG. 4 excluding the inner panel.
[Explanation of symbols]
2 Inner panel 6 Belt line portion 8 Door pillars 10 and 12 Door hinge 14 Latch reinforcement member 16 Door latch 18 Auxiliary beam 20 Reinforcement beam 28 Hinge mounting surface 34 Outer panel 37 Outer coupling portion 40 Front joint 42 Beam reinforcement member 44 Beam side joint portion 46 Pillar side Junction

Claims (2)

A door body having an outer panel and an inner panel;
The outer panel and the inner panel are connected to each other at the front portion of the door body, and the front end of the door body extends from the hinge mounting surface facing the front of the door body and the outer edge of the hinge mounting surface. A door pillar having an outer coupling portion to which a front edge of the outer panel is coupled,
A latch reinforcing member provided to reinforce the inner panel at a rear portion of the door body, and used for attaching a door latch;
A reinforcing beam provided on the inner panel side and having a hollow closed cross-sectional shape extending along the inner panel between the door pillar and the latch reinforcing member;
A connecting front joint between the door pillar and the front end of the reinforcing beam ;
A rear joint that connects between a rear end of the reinforcing beam and the latch reinforcing member, the front joint,
A beam reinforcing portion that is attached to a surface opposite to the hinge mounting surface of the door pillar and reinforces the door pillar;
A beam-side joint that extends integrally rearward from the inner edge of the beam reinforcing portion and is superimposed on the front end portion of the reinforcing beam and connected to each other by spot welding;
Wherein the outer edge of the beam reinforcement section extends integrally forwardly superposed to the outer coupling portion of the door pillar, viewed contains a pillar-side joining portion connected to each other by spot welding,
The rear joint is
A beam reinforcing member that extends in the longitudinal direction of the reinforcing beam, is superimposed on each of the rear end of the reinforcing beam and the latch reinforcing member, and is connected to the rear end of the reinforcing beam and the latch reinforcing member by spot welding. The vehicle door characterized by the above. A panel reinforcing member provided on the outer panel side and extending along the outer panel;
The panel reinforcing member has a front end portion joined to the pillar side joint portion so as to sandwich the pillar side joint portion between the outer joint portion and a rear end joined to the inner panel. The vehicle door according to claim 1.

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