JP3651604B2 - 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 side beam as a reinforcing member is disposed inside the door body composed of the outer panel and the inner panel, and this side beam is located between the door pillar of the door and the latch reinforcing member. Is extended. The door pillar and the latch reinforcing member are used for attaching the door hinge and the door latch.
[0003]
[Problems to be solved by the invention]
However, even if a side beam is built in the vehicle door, if a large impact force is input from the front to the door due to a frontal collision, etc., the side beam alone cannot sufficiently withstand this impact force. 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 have a closed cross-section and are preferably arranged along the beltline part of the door. That is, since the belt line portion is an entrance through which the window glass projects and sinks, its mechanical strength is relatively low, and the rigidity of the door can be increased by compensating for this lack of strength with a reinforcing beam having a closed cross section.
[0005]
However, even if the above-described reinforcing beam is added, unless the impact force from the front described above is effectively transmitted to the rear through the reinforcing beam, the shock-absorbing ability is not effectively exhibited.
This point will be described in detail. Since the impact force is first input to the door pillar through the door hinge, it is necessary to firmly connect the door pillar and the reinforcing beam. It is desired to develop a joint structure suitable for the connection of the two.
[0006]
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.
[0007]
[Means for Solving the Problems]
To achieve the above object, a vehicle door according to the present invention (Claim 1) extends along a belt line portion and forms an upper reinforcing beam forming a closed cross-sectional shape, and a closed extending in parallel below the upper reinforcing beam. A pillar-side joint for connecting the upper reinforcing beam and the door pillar, having a closed cross-section formed by the door pillar and the upper reinforcing beam. On the other hand, a hinge reinforcing member that reinforces the door pillar for mounting the door hinge is provided with a joint, and this joint extends in the longitudinal direction of the upper reinforcing beam and is joined to the closed cross section.
[0008]
According to the vehicle door described above, the impact force input to the door pillar from the front via the door hinge is transmitted from the joint portion of the door pillar and the hinge reinforcing member to the closed cross-section portion of the pillar-side joint. After being received, it is transmitted rearward through the upper reinforcing beam.
Specifically, the upper reinforcing beam is composed of an inner reinforcing plate material on the inner panel side and an outer reinforcing plate material on the outer panel side, and the closed cross-section portion 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. In addition, as for the site | part of the door pillar which forms the closed cross-section part of a pillar side joint, it is desirable to be joined to the inner reinforcement board | plate material.
[0009]
Furthermore, the joint portion of the hinge reinforcing member is spot welded to a portion of the outer reinforcing plate member that forms the closed cross section (Claim 3). In this case, the joint portion of the hinge reinforcing member transmits an impact force to the pillar side joint. Reliable transmission to the closed section.
[0010]
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.
[0011]
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.
[0012]
The inner panel 2 includes 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, the belt line portion 6, and extends in the front-rear direction of the vehicle along the inner panel 2.
The front end of the upper reinforcing beam 18 cooperates with the door pillar 8 to form a pillar side joint, while the rear end cooperates with the latch reinforcing member 14 to form a latch side joint. The pillar side joint connects between the upper reinforcing beam 18 and the door pillar 8, and the latch side joint connects between the upper reinforcing beam 18 and the latch reinforcing member 14, details of which will be described later.
[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 the upper reinforcing beam 18. It extends in parallel. The lower reinforcing beam 20 also has a closed cross section like the upper reinforcing beam 18. Specifically, the lower reinforcing beam 20 is made of a pipe member and has a circular closed cross section.
[0014]
The front end portion 22 and the rear end portion 24 of the lower reinforcing beam 20 are respectively coupled 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, it is positioned 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 not only used for assembling a window regulator or the like. Contributes to 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, 12. In FIG. 2, lines L ₁ and L ₂ shown by alternate long and short dash lines are used to connect the upper door hinge 10. 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.
[0016]
More specifically, the front edge 32 of the inner panel 2 extends to the vicinity of the hinge mounting surface 28 in the door pillar 8 and is joined to the door pillar 8 by spot welding. On the other hand, the end 37 on the outer panel 34 side of the door pillar 8 is folded back toward the front, and the front edge 36 of the outer panel 34 is coupled to the tip by hemming.
[0017]
As is apparent from FIG. 2, the above-described upper reinforcing beam 18 includes an inner reinforcing plate member 38 on the inner panel 2 side and an outer reinforcing plate member 40 on the outer panel 34 side, and these inner and outer reinforcing plate members 38 and 40 cooperate with each other. By doing so, the above-described closed cross-sectional shape is configured.
The front end portions of the inner and outer reinforcing plate members 38 and 40 are respectively joined to the door pillar 8 by spot welding, and the pillar side joint 42 described above is formed in cooperation with the door pillar 8.
[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 a surface opposite to the hinge mounting surface 28 of the door pillar 8 and the end of the door pillar 8. It is bent so as to stick to 37 and is superimposed on the door pillar 8. Note that 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 in 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 mounting surface 28 along the front edge 32 of the inner panel 2, is then bent along the front end portion 44 of the inner reinforcing plate 38, and is in close contact with the front end portion 44. The outer reinforcing plate member 40 is further folded back and is in close contact with the outer reinforcing plate member 40.
[0020]
The pillar extension portion 48 is joined by spot welding at the close contact portions with the inner and outer reinforcement plate members 38 and 40, so that the horizontal pillar extension portion 48 and the outer reinforcement plate member 40 are connected to the upper reinforcement beam as is apparent from FIG. The closed cross section 50 is formed as viewed in the 18 longitudinal cross sections.
Further, a hinge reinforcing member 52 is attached to the front end portion 46 of the outer reinforcing plate member 40. The hinge reinforcing member 52 reinforces the hinge mounting surface 28 of the door pillar 8 together with the front end portion 46.
[0021]
The hinge reinforcing member 52 integrally has a joint portion 54 bent along the outer reinforcing plate member 40, and this joint portion 54 extends in the longitudinal direction of the upper reinforcing beam 18, and the outer reinforcing plate member 40 has a plurality of portions. Are joined by spot welding.
Further, as apparent from FIG. 2, the front end portion 46 of the panel reinforcing member 53 in 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 connected to the door pillar 8. And the panel reinforcing member 53.
[0022]
3 shows an arrow view from the direction III in FIG. 2, and the inner panel 2 is removed in the arrow view. In FIG. 3, reference signs A, B, and C attached to the extension pillar portion 48 of the door pillar 8 correspond to the portions A to C of the extension pillar portion 48 in FIG. 2, respectively.
On the other hand, the latch side joint 58 which connects between the upper side reinforcement beam 18 and the latch reinforcement member 14 is shown by FIG.
[0023]
As apparent from FIG. 4, the latch reinforcing member 14 has an L-shaped cross section extending along the bent rear end portion 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 portion 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 coupled 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 in which the inner and outer reinforcing plate members 38 and 40 are overlapped with each other, and this rear end portion is a latch reinforcing member between the inner panel 2 and the rear end portion. 14 is sandwiched and engaged with the latch reinforcing member 14 by spot welding. As is clear from FIG. 4, the rear end of the outer reinforcing plate 40 is extended from the rear end of the inner reinforcing plate 38 and extends along the latch reinforcing member 14.
[0025]
According to the vehicle door described above, since the upper reinforcing beam 18 and the lower reinforcing beam 20 are respectively built in between the inner panel 2 and the outer panel 34, the rigidity and durability of the vehicle door are improved. Can do. In addition, since the upper reinforcing beam 18 extends along the belt line portion 6, the belt line portion 6 is effectively compensated for insufficient strength and the strength thereof is increased.
[0026]
When an impact force from the front is input to the vehicle door, the impact force is first received by the door pillar 8 from the upper and lower door hinges 10 and 12.
Here, paying attention to the pillar side joint 42 that connects between the door pillar 8 and the upper reinforcing beam 18, the pillar side joint 42 is formed by the extension pillar portion 48 of the door pillar 8 and the outer reinforcing plate member 40 of the upper reinforcing beam 18. Since the closed cross section 50 is formed, both the rigidity of the pillar side joint 42 and the joint strength thereof are high.
[0027]
Further, in the pillar side joint 42, the joint 54 of the hinge reinforcing member 52 that overlaps the closed cross section 50 extends in the longitudinal direction of the upper reinforcing beam 18, and is spot welded to the closed cross section 50. The bond strength between 52 and the closed section 50 is also increased. That is, spot welding exhibits a large resistance to an impact force, that is, a shearing force, and the shearing energy is highly absorbed.
[0028]
Therefore, even if the impact force described above is transmitted from the door pillar 8 to the pillar side joint 42, the pillar side joint 42 is not crushed by the impact force, and this impact force is applied to the upper reinforcing beam 18, that is, the inner reinforcing plate 38 and Each outer reinforcing plate 40 can be distributed and transmitted.
Here, since the inner and outer reinforcing plates 38 and 40 of the upper reinforcing beam 18 give a rectangular closed cross-sectional shape to the upper reinforcing beam 18, the impact force transmitted to the upper reinforcing beam 18 passes through the latch side joint 58. Is transmitted to the latch reinforcement member 14 and then escaped from the latch reinforcement member 14 via the door latch 16 to the cab body.
[0029]
As a result, the pillar-side joint 42 can exhibit excellent shock absorption of the upper reinforcing beam 18 with respect to the above-described impact force, and can improve the collision safety of the vehicle door. That is, since the collapse at the pillar side joint 42 and the buckling at the upper reinforcing beam 18 are prevented, an 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, and from the latch reinforcing member 14 to the door latch. Needless to say, the cab body escapes through 16.
The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, the upper reinforcing beam 18 can be constituted only by the outer reinforcing plate member 40, and in this case, a closed cross-sectional shape is formed between the outer reinforcing plate member 40 and the inner panel 2.
[0031]
Further, the vehicle door of one embodiment is suitable for a cab of a small truck, but 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.
[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. Since the joint is formed by forming a closed cross-section with a joint and the hinge reinforcement member is extended to this closed cross-section, both the rigidity and bonding strength of the pillar side joint increase, and upper reinforcement The beam can exhibit excellent shock absorption, and can improve not only the rigidity of the vehicle door itself but also the collision safety.
[0033]
Further, when the closed cross-section portion of the pillar-side joint and the joint portion of the hinge reinforcing member are spot-welded (Claim 3), the rigidity at the closed cross-section portion can be further increased.
[Brief description of the drawings]
FIG. 1 is a 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.
[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 Upper reinforcement beam 20 Lower reinforcement beam 38 Inner reinforcement plate material 40 Outer reinforcement plate material 42 Pillar side joint 48 Pillar extension 50 Closed section (pillar) Extension part 48 + outer reinforcing plate 40)
52 Hinge reinforcement member 54 Joint (spot welding)

Claims (3)

A door body having a belt line portion that secures a window glass storage space between the outer panel and the inner panel, and the window glass projects and sinks;
A door pillar that is provided at a front portion of the door body, connects the outer panel and the inner panel, and is used to attach a door hinge;
A hinge reinforcing member that is attached to the door pillar and reinforces the attachment 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 attaching a door latch;
An upper reinforcing beam that extends along the belt line portion on the inner panel side and forms a closed cross-sectional shape;
A pillar-side joint connecting the upper reinforcing beam and the door pillar;
A latch side joint for coupling between the upper reinforcing beam and the latch reinforcing member;
A lower reinforcing beam having a closed cross-sectional shape provided in parallel below 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 hinge reinforcing member has a joint portion that extends in a longitudinal direction of the upper reinforcing beam and is joined to the closed cross section. The upper reinforcing beam is composed of 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 portion is formed by the door pillar and the outer reinforcing plate member. The vehicle door according to claim 2, wherein the joint portion is spot welded to a portion of the outer reinforcing plate member that forms the closed cross-section portion.

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