JP3723759B2 - Side impact bar for automobile doors - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automobile door side impact bar (hereinafter abbreviated as a side impact bar) provided between an inner door panel and an outer door panel of an automobile door to protect an occupant from an impact force from the outside of the automobile door.
[0002]
[Prior art]
As shown in FIG. 8, the side impact bar is provided on the outer door panel 12 side between the inner door panel 13 and the outer door panel 12 of the automobile door. Traditionally, steel pipes have been used, and in recent years, one or a plurality of steel pipes made of a wound pipe 14 have been fixed in parallel for the purpose of weight reduction. Since the side impact bar of such a wound pipe and steel pipe has a three-member configuration of a pipe and brackets at both ends, a welding process between the pipe end and the bracket is always required during manufacturing. In order to make this point a structure that does not require welding at the time of manufacture, the present inventor previously formed two steel plates into a corrugated plate shape, so that the crests are symmetrical at the same position. After that, JP-A-2001-294042 proposes fixing the front and back symmetrical trough steel plates with caulking portions and hemming the overlapping edges to form side impact bars.
[0003]
[Problems to be solved by the invention]
However, depending on the door structure, the conventionally proposed side impact bar is wide and difficult to lay out, and it is difficult to paint the interior. Moreover, in order to protect a passenger | crew from the impact force from the exterior of a motor vehicle door, higher strength is requested | required. Therefore, we decided to develop a side impact bar that does not require welding at the time of manufacture, and therefore is less likely to corrode, can be easily laid out inside the door, and can be manufactured at low cost, and has a high strength structure. .
[0004]
[Means for Solving the Problems]
As a result of studying the above problems, an edge portion is formed between the channel-shaped inner plate A having a bracket portion for fixing the door panel to the longitudinal end portion and the outer plate B having a turn-up projection contacting the plate A near the center in the width direction. The side impact bar for automobile doors has a united structure. In other words, the inner plate A is formed in such a manner that the folded projections of the outer plate B come into contact with the inside of the channel inner plate A, and a high strength is ensured even if a steel plate is used as the material. Yes.
[0005]
The edge of the channel-shaped inner plate A is a folded edge outward from the side wall, so that the union with the edge of the outer plate B is facilitated. The inner plate A and the outer plate B are prevented from being displaced by providing a displacement preventing recess in advance at the folded edge of the inner plate A and the edge of the outer plate B.
[0006]
By providing a reinforcing bead on the side wall of the channel-shaped inner plate A, the rigidity in the load direction as the side impact bar, the torsional rigidity, and the like can be increased. Both the shift stop recess and the reinforcing bead can be formed in advance by pressing.
[0007]
The bracket portion at the longitudinal end portion of the channel-shaped inner plate A of the side impact bar for automobile doors of the present invention is provided with a flat surface or a curved surface for spot welding for fixing to the door panel. When a flat surface or a curved surface for spot welding is provided in this way, the side impact bar can be assembled to the door panel by spot welding, or can be automated.
[0008]
Moreover, the outer plate B of the side impact bar for automobile doors of the present invention has a separation preventing claw cut out in advance and has a coating hole formed on the folded portion base portion side where the folded projection is formed. The anti-separation claw restrains the base side wall surface of the folded portion for forming the protrusion and prevents it from separating, and the hole formed with the cut-out formation becomes a hole for painting, and the hollow of the side impact bar It enables painting of the inner wall of the club.
[0009]
A metal pipe or a wound pipe is formed by combining the channel-shaped inner plate A formed by the hemming process as described above and the outer plate B having a folding protrusion in contact with the plate A at the center by the hemming process. Rather than relying on it, a side impact bar for automobile doors for protecting passengers from the impact force from the outside of the door is produced using a steel plate. As a specific example of the manufacturing process, first, the inner plate A and the outer plate B are each pressed from a steel plate by pressing to form a predetermined shape and unevenness that becomes a turn-up projection, and a separation preventing claw is cut out. Next, while the center folding protrusion is bent and formed on the outer plate B, it is united with the channel inner plate A at the edge by hemming. Furthermore, a side impact bar for a car door having high rigidity can be manufactured by caulking the separation preventing claw to restrain the base side wall surface of the folded portion.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings. 1 is a perspective view of a side impact bar for an automobile door according to the present invention, FIG. 2 is a sectional view taken along line XX in FIG. 1, and FIG. 3 is a sectional view taken along line YY in FIG. As is apparent from these drawings, the side impact bar 1 for an automobile door according to the present invention has a channel-shaped inner plate A having bracket portions 2 and 3 for fixing the door panel to the longitudinal end portion, and a central portion in the width direction. In this structure, the plate A and the outer plate B having the folding protrusion 4 with which the tip abuts are united at the edge. That is, it is formed by hemming so that the folded projection 4 of the rib-shaped outer plate B is brought into contact with the inside of the channel-shaped inner plate A when combined, and even if a steel plate is used as the material, high strength is obtained. It is a secured structure. The strength can be increased by quenching the inner door panel side (near the groove bottom) of the channel inner plate A and the folded protrusion 4 of the outer plate B. The bracket portions 2 and 3 for fixing to the door panel are preferably fixed to the door panel by spot welding. Other fixing means such as screws may be used.
[0011]
The edge portion of the channel inner plate A is formed as the folding edges 5 and 5 outward from the side walls, thereby facilitating the coalescence with the edge portions 6 and 6 of the outer plate B. If the folding-back recesses 7 and 8 are provided in the folded edges 5 and 5 and the edges 6 and 6, the slippage between the inner plate A and the outer plate B is prevented.
[0012]
Reinforcement beads 9 are provided on the side walls 2a and 2b of the side wall of the channel inner plate A and the center folding protrusion 4 of the outer plate B to provide rigidity in the load direction as a side impact bar, torsional rigidity, and the like. Can be increased. Both the displacement stoppers 7 and 8 and the reinforcing beads 9 can be formed by hem processing.
[0013]
In the example of FIG. 1, the fixing bracket portions 2 and 3 integrally formed at the longitudinal ends of the channel-shaped inner plate A of the side impact bar for automobile doors of the present invention are connected to the inner door panel 13 as shown in FIG. It can be a longitudinal flat surface for spot welding or a curved surface perpendicular to the longitudinal direction as shown in FIG. When the fixing bracket portions 2 and 3 are joined to the inner door panel 13 in a direction perpendicular to the inner door panel 13, the fixing bracket portions 2 and 3 can be firmly joined by using curved surfaces as shown in FIGS. If a flat surface or a curved surface for spot welding is provided in this way, the side impact bar can be assembled to the door panel by spot welding P, and automation is possible. In the fixing bracket portion 2 formed wider than the impact bar main body, a rib 2c for increasing rigidity is formed simultaneously with the main body molding by hemming.
[0014]
Further, the outer plate B of the side impact bar for an automobile door according to the present invention has the separation prevention claw 10 cut out and formed at the same time as the coating hole 11 on the base side of the folded portion where the folded projection 4 is formed. As shown in FIG. 2, the separation preventing claw 10 restrains the base side wall surface 2b of the folded portion for forming the protrusion to prevent separation. Moreover, the hole formed with the cut-out formation becomes the coating hole 11 and enables the coating of the inner wall of the hollow portion of the side impact bar of the present invention.
[0015]
The manufacturing method of the side impact bar 1 for an automobile door mainly includes three steps. First, the inner plate A and the outer plate B are each pressed from a steel plate by pressing to give a predetermined shape and unevenness that becomes a turn-up projection, and the separation preventing claw 10 is cut out. As a result, the coating hole 11 is formed. Next, the inner plate A and the outer plate B are pressed from a steel plate by pressing to give a predetermined shape and the projections and recesses 4 to form the folding protrusions 4, and the separation preventing claw 10 is cut out, and then the outer plate B is folded at the center. It joins with the channel inner plate A at the edge by hemming while forming the protrusion. Furthermore, the side impact bar 1 for a motor vehicle door with high rigidity is manufactured by caulking the separation preventing claw 10 and restraining the base side wall surface 2b of the folded portion. The split groove 15 seen in the outer plate B forming the turn-up protrusion 4 holds a sealer material that also serves as a cushioning material between the side door and the outer door panel of the automobile door when the side impact bar is arranged in the automobile door. It is effective.
[0016]
【The invention's effect】
The side impact bar for an automobile door according to the present invention has sufficient strength to protect an occupant from an impact force from the outside of the automobile door. In particular, since the folding protrusion is provided near the center of the outer plate B in the width direction, it is in contact with the inner plate A to reinforce. Moreover, since welding is not required at the time of manufacture, corrosion is unlikely to occur. Since it has a diameter close to that of a wound pipe or steel pipe, it is easy to lay out in an automobile door. Furthermore, since the conventional winding pipe and steel pipe have a point that it is difficult to paint to the inside, the coating hole is formed, so that it can be easily painted. Since it can manufacture using a steel plate and can use hemming processing, it can manufacture at low cost. In addition, since it can be manufactured using a thin steel plate, it is lightweight.
[Brief description of the drawings]
FIG. 1 is a perspective view of a side impact bar for an automobile door according to the present invention.
FIG. 2 is a sectional view taken along line XX in FIG.
3 is a cross-sectional view taken along line YY in FIG.
FIG. 4 is a perspective view of another example of a bracket portion.
FIG. 5 is a cross-sectional view showing how the bracket portion is joined to the door panel.
FIG. 6 is a cross-sectional view showing how a bracket portion of another example is joined to a door panel.
FIG. 7 is a cross-sectional view showing how a bracket portion of another example is joined to a door panel.
FIG. 8 is a cross-sectional view showing a state of arrangement of a conventional side impact bar in an automobile door.
[Explanation of symbols]
1 Side impact bar for automobile door 2 Bracket for fixing
2a Base side wall surface of folded part
2b Base side wall surface of folded part
2c Rib 3 Fixing bracket part 4 Folding protrusion 5 Folding edge 6 Outer plate edge 7 Misalignment recess 8 Misalignment recess 9 Reinforcement bead
10 Separation prevention nail
11 Paint hole
12 Outer door panel
13 Inner door panel
15 Split groove A Channel inner plate B Outer plate

Claims (4)

A channel-shaped inner plate A having a bracket portion for fixing to a door panel at an end portion in the longitudinal direction and an outer plate B having a folding protrusion that abuts against the inner plate A in the vicinity of the center in the width direction are united at the edge portion. In the side impact bar for an automobile door, the edge of the channel-shaped inner plate A is a folded edge outward from the side wall, and the plate A extends to the folded edge of the inner plate A and the edge of the outer plate B. , Side impact bar for automobile doors, which is provided with a recess for preventing misalignment between B and B. Said longitudinal end brackets of the channel-shaped inner plate A is an automobile door side impact bar according to claim 1, wherein a flat surface in the longitudinal direction as the spot welding points for fixation to the door panel. It said longitudinal end brackets of the channel-shaped inner plate A is claim 1 automotive door side impact bar, wherein the curved surface of the longitudinal direction perpendicular to the spot welding point for fixing to the door panel.   2. The side impact bar for an automobile door according to claim 1, wherein the outer plate B is formed by cutting out a separation preventing claw and forming a coating hole on the base side of the folded portion where the folded projection is formed.

Images