JP2002301933A - Mounting structure of side door impact bar and method of manufacturing bracket for side door impact bar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain reduction of a cost of material and manufacture and reduction of assembly man-hours, and surely obtain a sufficient impact absorbing effect while promoting reduction of weight, relating to a mounting structure of a side door impact bar and a method of manufacturing a bracket for the side door impact bar. SOLUTION: This mounting structure is constituted so as to provide a hinge panel 11 serving partly as a side panel 10 to mount a door hinge 14 from the outer surface side, a bracket 30 arranged in a position almost opposed to the door hinge 14 so as to be along the inner surface side of the hinge panel 11 to support the door hinge 14 in cooperation with the hinge panel 11, a hole part 33 for mounting drilled in a door hinge support surface 31 provided in the bracket 30, and an impact bar 20 inserting one end part 20a to the hole part for mounting fixed to the bracket 30 to be arranged so as to be along the longitudinal direction of a vehicle on the inside of the door 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side door impact bar mounting structure for reinforcing a side door of a vehicle such as an automobile, and a method of manufacturing a bracket for mounting the side door impact bar.

[0002]

2. Description of the Related Art In recent years, various measures against collision have been taken in vehicles such as automobiles, and a side door impact bar (hereinafter, also referred to as a door impact bar or simply an impact bar) is provided in a side door of the vehicle. Techniques have also been developed to equip it to protect occupants from side impacts on vehicles. The impact bar is also called an impact beam.

9 and 10 show a mounting structure of a conventional side impact bar mounted on a side door of an automobile on a door hinge side. FIG. 9 is a perspective view of the mounting structure, and FIG. It is arrow sectional drawing. As shown in FIGS. 9 and 10, one end (usually the front end) of the door 10 of the automobile is
A hinge panel 11 is provided.
, A hinge plate 12 is fixed by spot welding or the like. The hinge plate 12 is provided with a weld nut 13, and the door 10 is provided with the weld nut 13.
Door hinge 1 by a mounting bolt (not shown)
4 and attached to the vehicle body 15 side. The door hinge 14 is formed by pivotally connecting a vehicle body side member 14a and a door side member 14b to each other.

[0004] The side impact bar 20 is in the form of a pipe and, like the hinge plate 12, has a hinge panel 1.
1 is disposed inside the door. In addition, one end of the side impact bar 20 should be disposed in the vicinity of the hinge plate 12 in many cases.
The side impact bar 20 is mounted via an impact bar bracket (hereinafter, simply referred to as a bracket) 21 so as not to interfere with the side impact bar.

The bracket 21 has a base end 21a fixed to a surface 11a of the hinge panel 11 facing outward of the vehicle body side by spot welding or the like, and a surface 21c of the front end 21b facing outward of the vehicle body (this is referred to as a mounting surface) 21c. One end 20a of the side impact bar 20 is connected to the side impact bar 20 by arc welding or the like. The mounting surface 21 of the tip 21b of the bracket 21
c is formed in a semi-cylindrical concave surface in conformity with the pipe-shaped side impact bar 20.

Surface 1 of hinge panel 11 facing outward from side of vehicle body
1a is located inside the door 10 at a position near the inner surface 16a of the outer panel 16, while the side impact bar 10 is a pipe having a certain diameter (for example, about 40 mm). In order to be accommodated inside, the bracket 21 has the mounting surface 21c of the front end portion 21b facing the vehicle body side outward with respect to the base end portion 21a. It needs to be biased. For this reason, the intermediate portion 21d of the bracket 21
The mounting surface 21c is bent and deformed so as to be deviated toward the inside of the vehicle by a required amount with respect to the base end portion 21a.

[0007]

As described above, in the conventional side impact bar (door hinge side) mounting structure, one end 20a of the side impact bar 20 is provided.
Is mounted via a bracket 21 so as to avoid interference with the hinge plate 12. Due to this mounting structure, the side impact bar 2 is attached to the hinge panel 11.
The one ends 20a of the zeros are largely separated from each other as shown by a symbol d in FIG.

The distance d becomes shorter when the intermediate portion 21d of the bracket 21 is extremely bent and deformed. However, it is most advantageous in terms of cost to use the press working for the formation of the bracket 21. In this case, it is extremely difficult to cause the intermediate portion 21d to be extremely bent and deformed. Therefore, the distance d between the hinge panel 11 and the one end 20a of the side impact bar 20 is inevitably increased.

Therefore, in order to transmit and absorb the impact received by the side impact bar 20 to the hinge panel 11 and the vehicle body 15 side, the bracket 21 between the side impact bar 20 and the hinge panel 11 needs to have sufficient rigidity. In general, a thick metal plate is used for the bracket 21 and the size of the bracket 21 is increased.

However, as the distance d between the hinge panel 11 and the one end 20a of the side impact bar 20 increases, an extremely large load (force, moment) is applied to the bracket 21 when the side impact bar 20 receives an impact. Even if the bracket 21 has a large plate thickness and a large size, there is a problem that it is difficult to obtain a sufficient shock absorbing effect because the bracket 21 is elongated or deformed.

If the bracket 21 is large and large, the material cost increases and the weight increases, which leads to an increase in vehicle manufacturing costs and an increase in door weight. In particular, an increase in the weight of the door is not preferable because it causes the door to drop and also increases the weight of the vehicle. Further, since the hinge plate 12 and the bracket 21 are separated from each other, the conventional hinge plate (without the side impact bar) can be used as it is, but two parts are manufactured. This leads to an increase in manufacturing cost and an increase in the number of assembling steps, which is not preferable.

Incidentally, Japanese Patent Application Laid-Open No. 9-164841 proposes a structure in which an impact bar bracket is welded to a hinge retainer (hinge plate) of a door. However, in this structure, the impact bar bracket is fixed to the hinge plate instead of being directly attached to the hinge panel, and the distance d between the hinge panel and one end of the side impact bar is still large, and there is no improvement in the shock absorbing effect. Not planned. In addition, no sufficient improvement has been made in each aspect of material costs, manufacturing costs, and assembly man-hours.

Japanese Patent Application Laid-Open No. 9-52522 discloses that
A structure has been proposed in which an impact beam is directly welded to a hinge brace (hinge plate) of a door. In this structure, one end of the impact beam is close to the hinge panel, but the point of connection of the impact beam to the hinge brace is separated from the hinge panel, and the substantial connection between the hinge panel and one end of the side impact bar is made. The distance d is still large, and the effect of absorbing the shock has not been improved.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and aims to reduce material costs and manufacturing costs and to reduce the number of assembling steps. It is an object of the present invention to provide a side door impact bar mounting structure and a method for manufacturing a side door impact bar bracket that can be obtained.

[0015]

According to the first aspect of the present invention, there is provided a side door impact bar mounting structure.
A door hinge member is attached to the hinge panel member forming a part of the door member on the side of the vehicle from the outer surface side, and a bracket member is provided at a position substantially opposed to the door hinge member along the inner surface side of the hinge panel member. The hinge panel member and the bracket member cooperate to support the door hinge member. A mounting hole is formed in a support surface of the bracket member that supports the door hinge member, and an impact bar member that is disposed inside the door member so as to extend in the front-rear direction of the vehicle has one end thereof for the mounting. It is inserted into the hole and fixed to the bracket member.

Accordingly, one end of the impact bar member is connected to the support surface of the door hinge member of the bracket member, and the impact applied to the impact bar member from outside the vehicle is generated at one end of the impact bar member.
The power is transmitted from the support surface of the door hinge member of the bracket member to the bracket member, and further transmitted to the hinge panel member, so that it is possible to cope with such an impact by a vehicle frame member such as the hinge panel member.

In the mounting structure for a side door impact bar according to a second aspect of the present invention, a door hinge member is attached to the hinge panel member forming a part of the door member on the side of the vehicle from the outer surface side, while the hinge is attached to the hinge panel member. A bracket member is disposed at a position substantially facing the door hinge member along the inner surface of the panel member, and the hinge panel member and the bracket member cooperate to support the door hinge member. A mounting projection is perforated on a support surface of the bracket member that supports the door hinge member, and an impact bar member disposed inside the door member along the front-rear direction of the vehicle has one end thereof attached to the mounting bar. It is locked to the projection and fixed to the bracket member.

Accordingly, one end of the impact bar member is connected to the support surface of the door hinge member of the bracket member via the mounting projection, and the impact applied to the impact bar member from outside the vehicle is reduced. At one end of the bracket member, the mounting projection of the bracket member is transmitted to the bracket member through the support surface of the door hinge member, and further transmitted to the hinge panel member.
The vehicle frame member such as the hinge panel member can cope with such an impact.

In the above-described side door impact bar mounting structure (claims 1 and 2), the hinge panel member includes, in addition to the inner surface generally facing the rear of the vehicle, an outward facing surface facing the vehicle. And the bracket members are
The hinge panel is formed so as to have a first surface joined to an inner surface of the hinge panel member and a second surface bent at a substantially right angle from the first surface and joined to the outward surface of the hinge panel member. Is preferred.

It is preferable that the mounting hole or the mounting projection is formed on the first surface. Further, the mounting hole may be formed on the first surface, and the mounting protrusion may be formed around the mounting hole.
A punching press process can be used to form the mounting hole on the first surface, and a burring process is used to form the mounting protrusion around the mounting hole. The bending between the first surface and the second surface can be performed by bending using a bend beam or the like.

According to a third aspect of the present invention, in the method for manufacturing a side door impact bar bracket, one end of the impact bar member disposed inside the door member on the side of the vehicle along the front-rear direction of the vehicle is connected. A first bracket member to be attached to the door hinge side of the door member and a second bracket member to attach the other end of the impact bar member to the door member on the side opposite to the door hinge are manufactured.

At this time, first, one strip-shaped sheet metal is sent to the production line, and is sequentially transferred on the production line.
Using a plurality of types of machine tools sequentially provided on the production line, performing a processing step of performing processing according to the first bracket member and the second bracket member at required portions of the strip-shaped sheet metal, A separating step of cutting the band-shaped sheet metal portion processed in the processing step and separating the first bracket member and the second bracket member from the band-shaped sheet metal is performed.

Therefore, using one production line,
The first bracket member and the second bracket member can be simultaneously and simultaneously processed from one sheet of sheet metal, and the two types of brackets can be manufactured efficiently.
In addition, since one strip-shaped sheet metal is sequentially transferred on a manufacturing line and sequentially processed by a plurality of types of machine tools, processing is performed by a so-called flow operation, which is suitable for automation. A plurality of types of press working in the above-mentioned working process are simultaneously performed by being attached to a press machine, so that working can be performed while efficiently using equipment.

A hinge panel member to which a door hinge member is attached from the outer side is provided on the door hinge side of the door member, and the first bracket member is located at a position substantially opposed to the door hinge member along the inner side of the hinge panel member. It is preferred to be arranged in. In this case, the hinge panel member is provided with an outward surface facing the vehicle in addition to the inner surface generally facing the rear of the vehicle, and the bracket member is connected to the first surface joined to the inner surface of the hinge panel member.
And a second surface which is bent at a substantially right angle from the first surface and is joined to the outwardly facing surface of the hinge panel member.

Further, the first surface has a mounting hole into which one end of the impact bar member is inserted.
In addition, it is preferable to form a mounting projection (claim 2) to which one end of the impact bar member is locked.
On the other hand, it is preferable that a bead on which the other end of the impact bar member is engaged is formed on the second bracket member.

In the case where the first and second bracket members are configured as described above, the processing step includes a bead forming step of processing a bead portion of the second bracket member on the strip-shaped sheet metal; A hole forming step of punching a mounting hole of the bracket member by punching press processing, a burring step of forming a mounting projection of the first bracket member by burring processing, and the like; And a bending step of bending a bent portion between the first surface and the second surface using a bend beam or the like.

[0027]

Embodiments of the present invention will be described below with reference to the drawings. First, a first embodiment of the present invention will be described. FIGS. 1 to 4 show a mounting structure of a side door impact bar according to a first embodiment of the present invention. FIG. 1 is a perspective view thereof, and FIG. FIG. 3 is a sectional view taken along the line BB of FIG. 1, FIG. 3 is a front view of the inside of the door and a sectional view thereof. 1 to 4, the same reference numerals as those in FIGS. 9 and 10 denote the same components.

In this embodiment, as shown in FIG. 4, a side door impact bar (impact bar member, hereinafter simply referred to as an impact bar) 20 is attached to a lower portion of the side door (door member) 10. One end 20a of the impact bar 20 is provided with a first bracket member (hereinafter, simply referred to as a bracket) 30 near a door hinge mounting portion below a hinge panel member (hereinafter, simply referred to as a hinge panel) 11 at one edge of the side door 10. The other end 20 b of the impact bar 20 is attached to the side door 10.
A second bracket member (hereinafter, simply referred to as a bracket) 40 is attached to a lower portion of the other edge panel member (hereinafter, simply referred to as a panel) 17. The hinge panel 11 is provided on the vehicle body front side of the side door 10, and the panel 17 is provided on the vehicle body rear side of the side door 10.

Using the bracket 30, the hinge panel 11
The mounting structure on one end 20a side of the impact bar 20 mounted on the side door corresponds to the mounting structure of the side door impact bar according to the present embodiment. The bracket 30 attached to the hinge panel 11, as shown in FIGS.
The door hinge member (hereinafter, simply referred to as a door hinge) 14 is disposed at a position substantially opposed to the door hinge member 14 along the inner surface 11 b side of the hinge panel 11, and supports the door hinge 14 in cooperation with the hinge panel 11. The bracket 30 is thus
It supports one end 20a of the impact bar 20 and also supports the door hinge 14, and has both the function of the hinge plate 12 and the function of the impact bar bracket 21 in the related art.

The bracket 30 has a first surface portion 31 and a second surface portion 32 which are formed by being bent substantially 90 degrees from each other. The first surface portion 31 is joined to the inner surface 11 b of the hinge panel 11 to support the door hinge 14 and the impact bar 20 (for this reason, the first surface portion 31 is also referred to as a support surface), and the second surface portion 32 is connected to the hinge panel 11. Inner surface 11
b, and is joined to an outwardly facing surface 11a formed outwardly of the vehicle by bending approximately 90 degrees.

The support surface (also simply referred to as a first surface)
A bending process using a bend beam or the like can be used to form a bend between the first surface portion 31 and the second surface portion (also simply referred to as a second surface) 32. The surfaces 31 and 32 are joined to the respective surfaces 11b and 11a of the hinge panel 11 by spot welding 36. In order to fix the impact bar 20, the support surface 31 is provided with a mounting hole 33 and a mounting projection 34 protruding therefrom. In addition, in order to fix the door hinge 14, a weld nut 35 is provided. Welded. In each weld nut welded portion of the support surface 31, a hole 35a into which a bolt screwed to the weld nut 35 can be fitted.
Are formed respectively.

The mounting hole 33 is set to an inner diameter slightly larger than the outer diameter of the impact bar 20 so that the one end 20a of the impact bar 20 having a cylindrical pipe shape can be fitted tightly. It can be formed using. The mounting projection 34 is formed in an arc shape around the mounting hole 33 and can be formed by burring.

The weld nut 35 is welded to the upper and lower sides of the mounting hole 33, respectively.
The hinge panel 11 is connected to the door-side member 14b of the door hinge 14 by a mounting bolt (not shown) screwed into the door 5. The vehicle body side member 14a of the door hinge 14 is attached to the vehicle body 15 side, whereby the door 10 is attached to the vehicle body 15 via the door hinge 14.

In the present embodiment, a minute rim 37 is formed at one edge of the support surface 31 so as to be bent substantially 90 degrees with respect to the support surface 31. The processing of the rim 37 depends on the support surface 3
Although this is intended to ensure the flatness of (1), the processing of the rim 37 may be omitted as long as the accuracy of the flat processing can be ensured.
Further, a notch 38 is formed from a part of the mounting hole 33 to include a bent portion between the support surface 31 and the second surface 32. The notch 38 facilitates bending of the support surface 31 and the second surface 32 and prevents the flatness of the support surface 31 and the second surface 32 from being reduced by the bending. belongs to. That is, if the bending process is performed near the mounting hole 33, the edge of the mounting hole 33 and the bending curve become almost parallel to each other, making the bending process difficult. The flatness around the hole 33 tends to decrease. Further, when the mounting projection 34 is protruded around the mounting hole 33 by burring or the like, the periphery of the processed portion is work hardened. The flatness tends to decrease.
Therefore, the notch 38 is formed so that the mounting hole 33 and the mounting projection 34 do not come close to the bent portion between the support surface 31 and the second surface 32. . Since the edge of the notch 38 is oriented in a direction perpendicular or substantially perpendicular to the bending curve, the bending process is easy, and the flatness after the bending process is easily ensured.

Since the mounting structure of the side door impact bar according to the first embodiment of the present invention is configured as described above, one end 20a of the impact bar 20 is formed on the support surface 31 of the bracket 30. The mounting holes 33 and the mounting projections 34 formed around the holes 33 are inserted and connected by beam welding or the like.

When an impact is applied to the impact bar 20 from the outside of the vehicle, the impact force is applied to the end surface 20a of the impact bar 20 from the mounting projection 34 to the support surface 31, the second surface 32, and the hinge panel. 11 and further transmitted from the hinge panel 11 to the frame member on the vehicle body side and received by the frame member on the vehicle body side. In particular,
One end 20a of the impact bar 20 is a hinge panel 11
10 is inserted into and fitted to the mounting projection 34 that is extremely close to the hinge bar 11, and the distance between the one end 20a of the impact bar 20 and the hinge panel 11 (see FIG. 10D) is very small. For this reason, when a load in the shear direction is applied between the impact bar 20 and the bracket member, the relative displacement of the impact bar member with respect to the bracket member is easily suppressed.

As a result, one end 2 of the impact bar 20
In the event that an impact is applied to the mounting bar 0a, an excessive moment or the like is not applied to the mounting projection 34, and one end 20a of the impact bar 20 is securely supported via the mounting projection 34, and the From above, it is possible to oppose an impact applied to the door 10, and a sufficient impact absorbing effect can be reliably obtained.

As shown in FIG. 2, a small gap s is provided between one end 20a of the impact bar 20 and the hinge panel 11, which is formed by the length of the impact bar 20, the shape of the hinge panel 11, and the like. The gap s is sufficiently smaller than the height H of the mounting projection 34, and there is no problem in absorbing the impact through the mounting projection 34.

The mounting hole 33 and the mounting projection 3
4, there is an effect that positioning and assembling of the impact bar 20 with respect to the bracket 30 can be facilitated. Further, since the bracket 30 has both a function corresponding to a hinge plate for supporting the door hinge 14 and a function for supporting one end 30a of the side impact bar 30, the number of components is reduced as compared with the related art, and the side impact bar support structure is reduced. In addition, cost reduction, assembling man-hours, and weight can be promoted.

Furthermore, since the distance between the hinge panel 11 and one end 30a of the side impact bar 30 is eliminated or shortened, the load on the bracket 30 against the impact applied to the impact bar 20 from outside the vehicle is greatly reduced, and The thickness can be made small and small, and this also has the effect of contributing to a reduction in material costs and manufacturing costs, a reduction in assembly man-hours, and a reduction in weight.

Next, a second embodiment of the present invention will be described. FIGS. 5 to 8 illustrate a method of manufacturing a bracket for a side door impact bar according to a second embodiment of the present invention. 5 is a schematic plan view of a band-shaped sheet metal for explaining a method of manufacturing a side door impact bar bracket according to a second embodiment of the present invention. FIGS. 6 to 8 are side door impact bar members and first and second embodiments. It is a figure which shows the bracket member of FIG. 5 to 8,
1 to 4 indicate the same components.

Of the brackets 30 and 40 to be manufactured,
First, as shown in FIGS. 5 and 8, a bracket (first bracket member) 30 is formed in the same manner as that of the first embodiment except for a bead 32b formed on a second surface 32 in a processing step. Therefore, the description is omitted here. Next, the bracket (second bracket member) 40 will be described. As shown in FIGS. 6 and 7, the bracket 40 is connected to the center of a strip-shaped sheet metal at the other end 20 b of the impact bar 20 by impact bar joining. A surface portion 41 is provided, and door joining surface portions 42 and 43 joined to the panel 17 of the side door 10 are formed on both sides of the impact bar joining surface portion 41.

The impact bar joining surface portion 41 is provided with a cylindrical concave surface 41a at which the cylindrical outer periphery of the other end 20b of the impact bar 20 can be aligned. The other end 20b of the impact bar 20 is connected to the cylindrical concave surface 41a. Joined by beam welding or the like. In the door joining surfaces 42 and 43, the back surfaces (the surface shown in FIG. 6 is the front surface and the back surface) are joined to the shelf surface 17a (see FIG. 7) of the panel 17 by spot welding or the like.

By the way, the bracket 30,
40 can be manufactured by simultaneous molding on a line using a strip-shaped sheet metal. Here, a method of manufacturing such a bracket (a method of manufacturing a bracket for a side door impact bar according to the present embodiment) will be described. In this manufacturing method, as shown in FIG. 5, several steps of processing are performed on one strip-shaped sheet metal 50 to simultaneously manufacture the front and rear brackets 30 and 40.

That is, while feeding the strip-shaped sheet metal 50 onto the production line and transferring it by a conveyor or the like (not shown),
Bead processing step P1, notch processing step P2, piercing processing step P3, burring processing step P4, bend processing step P
5, the respective brackets 30, 40 are processed to form the respective brackets 30, 40, and finally, the respective brackets 30, 40 are separated from the band-shaped sheet metal 50 by a separation / cutting step (separation step) P7. Here, an idle process P6 is provided after the bending process P5, and the process is sent to the separation / cutting process P7 after the return generated after the bending process is completed (so-called countermeasures against springback).

For this reason, on the production line, although not shown, a press forming machine for performing bead processing, a punching press machine for performing notch processing and piercing, and a burring processing. Burring machine,
Various machine tools such as a bending machine having a bend beam or the like for performing a bending process and a punching press machine for performing a separation and cutting are provided in this order.

Here, the shape of the bracket 30 is machined on one side (the lower side in FIG. 5) of the band-shaped sheet metal 50,
The shape of the bracket 40 is machined on the other side (the upper side in FIG. 5). Then, the band-shaped sheet metal 50 is transferred at a predetermined pitch, and is subjected to processing in each of the above-described processing steps. In this example, the strip-shaped sheet metal 50 is used.
The two brackets 30, 40 are simultaneously manufactured one by one in the width direction of the sheet metal.
A dimension having a widthwise dimension W that is large enough to allow for a processing allowance is used.

In this example, since each of the brackets 30 and 40 is processed one by one in each processing step, the belt-shaped sheet metal 5 is processed.
The transfer pitch of 0 corresponds to the length L required to manufacture one set of each bracket 30, 40. Of course, in the case where a plurality of sets of the brackets 30 and 40 are arranged in the production line direction and are simultaneously processed in each step, the strip-shaped sheet metal 50 may be transferred at a pitch corresponding to that.

Using such a line, the brackets 30, 40 are manufactured as follows. First, the left half (the upper part in FIG. 5) of the strip-shaped sheet metal 50 sent to the production line is subjected to bead processing by a pressure molding machine (bead processing step P1).
By this bead processing, a cylindrical portion of the impact bar joining surface portion 41 at the center of the bracket 40 is formed. Next, the strip-shaped sheet metal 50 on which the beading has been performed is transferred to a punching press machine, and the upper and lower ends of the brackets 30 and 40 are notched (notch processing step P2). Holes are formed by combining the cutouts 38 with the holes 43a and 32a and the mounting holes 33 (piercing step P3). Note that the piercing holes 43a and 32a are
Bracket 4 when fixing 0, 30 to the door panel by welding
Location holes for positioning 0,30.

In the notch processing step P2, cutting (notch processing) is performed while leaving the coupling margin 51 so that the materials of the brackets 30 and 40 are not separated back and forth. Further, the notch processing step P2 and the piercing processing step P3 may be separated as in this embodiment, but the notch processing step P2 and the piercing processing step P3 may be the same step. Next, the notched and pierced band-shaped sheet metal 50 is transferred to a burring machine, and burring is performed around a portion corresponding to the mounting hole 33 of the bracket 30, and the mounting protrusion 34 is formed. It is formed (burring process P4).

Next, the strip-shaped sheet metal 5 subjected to the burring process
0 is transferred to a bending machine, and a required portion is bent by approximately 90 degrees to form a bent portion between the support surface (first surface) 31 and the second surface 32 (bending process P5). ). In this bending, the bending is performed to an extra angle by a minute amount in consideration of the return after the bending. Next, after waiting for the return of the bend processing to be completed (idling step P6), the belt-shaped sheet metal 50 is sent to the separation cutting step P7.

In the separation and cutting process P7, the left and right middle halves of the band-shaped sheet metal 50 which has been subjected to the required processing are cut, and the joining margin 51 is cut.
Separate 40. The method for manufacturing the bracket for the side door impact bar according to the second embodiment of the present invention is configured as described above. It is possible to process different kinds of brackets 30, 40 (see FIG. 8),
The two types of brackets can be manufactured efficiently, and the cost reduction of the support structure for the side impact bar can be promoted.

As shown in FIG. 8, the reinforcing beads 31a and 31b may be formed in the bracket 30, for example, in a bend forming step P5. in this case,
Such bending reduces the return, and improves the strength of the bent surface. Further, in the present embodiment, the processing is performed by a so-called flow operation in which one strip-shaped sheet metal 50 is sequentially transferred on a production line and sequentially processed by a plurality of types of machine tools, which is suitable for automation. Also,
If a plurality of types of machine tools are mounted on a common press, and a plurality of types of press processing are simultaneously performed in the processing process (so-called progressive press processing),
Processing can be performed while using equipment efficiently, and cost reduction of the support structure for the side impact bar can be promoted.

Although the embodiment of the present invention has been described above, the present invention is not limited to the embodiment, and can be variously modified and implemented without departing from the gist of the present invention. For example, in the first embodiment, the mounting projection 3
An arc welding 39 is performed over substantially the entire circumference (excluding the cutout portion 38) by fitting the one end 30a of the side impact bar 30 into the inner peripheral surface of the side impact bar 30. Such welding is performed, for example, in FIG. At the appropriate point (in this case,
It may be partially applied to the front portion 39a receiving the side impact load and the upper portion 39b and the lower portion 39c separated from the front portion 39a.

Further, a structure is also conceivable in which one end 30a of the side impact bar 30 is fitted into the outer peripheral surface of the mounting projection 34. Further, although the mounting projections 34 are formed in an arc shape (substantially annular shape) here, the mounting projections 34 are formed at predetermined locations (for example, the welding locations 39a, 39b, and 3).
9c).

The mounting holes 33 and the mounting projections 3
Only one of the four may be provided. When only the mounting hole 33 is provided, one end 30a of the side impact bar 30 is fitted into the mounting hole 33 and the inner periphery of the mounting hole 33 and its periphery are welded to one end 30a of the side impact bar 30. Then, one end 30a of the side impact bar 30 may be supported by the inner periphery of the mounting hole 33 and the periphery thereof to counter side collision.

The processing steps of the second embodiment are merely examples, and the present manufacturing method can set appropriate processing steps in an appropriate order according to the bracket to be manufactured.

[0058]

As described in detail above, according to the mounting structure of the side door impact bar according to the first aspect of the present invention,
One end of the impact bar member is coupled to the support surface of the door member on the bracket member. That is, the distance between the hinge panel member and one end of the side impact bar member is eliminated. Therefore,
When a load in the shear direction is applied between the impact bar member and the bracket member, it is easy to suppress the relative displacement of the impact bar member with respect to the bracket member.

As a result, when an impact is applied to the impact bar member from outside the vehicle, the impact does not significantly extend or deform the bracket member at one end of the impact bar member. Since the power is reliably transmitted from the surface to the bracket member and the hinge panel member, it is possible to cope with such an impact, and it is possible to reliably obtain a sufficient impact absorbing effect.

Further, there is an effect that positioning and assembling of the impact bar member to the bracket member can be easily performed through the mounting hole. According to the side door impact bar mounting structure of the present invention, one end of the impact bar member is connected to the support surface of the door hinge member of the bracket member via the mounting projection. That is, the distance between the hinge panel member and one end of the side impact bar member becomes extremely short. Therefore,
When a load in the shear direction is applied between the impact bar member and the bracket member, it is easy to suppress the relative displacement of the impact bar member with respect to the bracket member.

As a result, when an impact is applied to the impact bar member from the outside of the vehicle, the impact does not significantly extend or deform the bracket member at one end of the impact bar member. Transmitted to the bracket member through the support surface of the door hinge member, and further transmitted to the hinge panel member,
It becomes possible to cope with such an impact, and a sufficient impact absorbing effect can be reliably obtained.

Further, there is an effect that positioning and assembling of the impact bar member to the bracket member can be facilitated through the mounting projection. Further, according to the side door impact bar mounting structure of the present invention, the bracket member has a function corresponding to a hinge plate supporting the door hinge member and a function supporting one end of the side impact bar member. Because of this, the number of parts is reduced as compared with the related art, and it is possible to promote cost reduction, assembling man-hours, and weight reduction of the support structure of the side impact bar member.

Further, since the distance between the hinge panel member and one end of the side impact bar member is eliminated or shortened, the load on the bracket member against the impact applied to the impact bar member from the outside of the vehicle is greatly reduced, and the bracket member is mounted on the plate. The thickness can be reduced to a small size, and from this point, there is also an effect that it is possible to contribute to reduction of material cost and manufacturing cost, reduction of the number of assembling steps and weight reduction.

According to the method of manufacturing a bracket for a side door impact bar according to the third aspect of the present invention, the first production line is used to simultaneously move the first sheet metal sheet from the one sheet metal sheet.
Of the bracket member and the second bracket member, the two types of brackets can be manufactured efficiently, and the cost reduction of the support structure for the side impact bar member can be promoted.

Further, since one strip-shaped sheet metal is sequentially transferred on a production line and sequentially processed by a plurality of types of machine tools, the processing is performed by a so-called flow operation, which is suitable for automation. Is mounted on a common press machine, so that a plurality of types of press working in the above-mentioned working process can be performed simultaneously, thereby making it possible to carry out working while efficiently using the equipment. Cost reduction can be promoted.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a mounting structure of a side door impact bar according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view (a cross-sectional view taken along the line AA in FIG. 1) illustrating a mounting structure of the side door impact bar according to the first embodiment of the present invention.

FIG. 3 is a cross-sectional view (a cross-sectional view taken along the line BB of FIG. 1) illustrating a mounting structure of the side door impact bar according to the first embodiment of the present invention.

FIGS. 4A and 4B are views showing a mounting structure of the side door impact bar according to the first embodiment of the present invention, wherein FIG. 4A is a front view of the inside of the door, and FIG. D-
D section view].

FIG. 5 is a schematic plan view of a band-shaped sheet metal for explaining a method of manufacturing a side door impact bar bracket according to a second embodiment of the present invention.

FIG. 6 is a schematic exploded perspective view showing a side door impact bar member and first and second bracket members according to a second embodiment of the present invention.

FIG. 7 is a schematic horizontal sectional view showing a side door impact bar member and first and second bracket members according to a second embodiment of the present invention.

FIG. 8 is a schematic perspective view showing first and second bracket members according to a second embodiment of the present invention.

FIG. 9 is a perspective view showing a conventional side door impact bar mounting structure.

FIG. 10 is a cross-sectional view (a cross-sectional view taken along the line CC of FIG. 8) showing a conventional side door impact bar mounting structure.

[Explanation of symbols]

Reference Signs List 10 Side door (door member) 11 Hinge panel (hinge panel member) 14 Door hinge (door hinge member) 20 Impact bar (impact bar member) of side door 20a One end of impact bar (impact bar member) 30 First bracket member ( Bracket) 31 support surface (first surface) 33 mounting hole 34 mounting protrusion 40 second bracket member (bracket) 50 belt-shaped sheet metal P1 to P5 processing step P7 separation step

 ──────────────────────────────────────────────────続 き Continued on front page (72) Inventor Toru Kimoto 5-33-8 Shiba, Minato-ku, Tokyo Inside Mitsubishi Motors Corporation (72) Inventor Susumu Kuno 5-33-8 Shiba, Minato-ku, Tokyo Mitsubishi Motors Industry Co., Ltd. (72) Inventor Kotaro Noda 110 Ryowa Metal Industry Co., Ltd.

Claims (3)

[Claims] 1. A hinge panel member forming a part of a door member on the side of a vehicle, to which a door hinge member is attached from an outer surface side, and disposed at a position substantially opposed to the door hinge member along an inner surface side of the hinge panel member. A bracket member provided to support the door hinge member in cooperation with the hinge panel member; a mounting hole formed in a support surface of the bracket member for supporting the door hinge member; A side door impact, comprising: an impact bar member disposed inside the vehicle along the front-rear direction and having one end inserted into the mounting hole and fixed to the bracket member. Bar mounting structure. 2. A hinge panel member which forms a part of a door member on a side surface of a vehicle and to which a door hinge member is attached from an outer surface side, and is disposed at a position substantially opposed to the door hinge member along an inner surface side of the hinge panel member. A bracket member provided to support the door hinge member in cooperation with the hinge panel member; a mounting projection projecting from a support surface of the bracket member supporting the door hinge member; An impact bar member disposed inside the vehicle in the front-rear direction and having one end portion locked to the mounting projection and fixed to the bracket member. Impact bar mounting structure. 3. A first bracket member for attaching one end of an impact bar member disposed inside a door member on a side surface of a vehicle along a front-rear direction of the vehicle to a door hinge side of the door member, and A method for manufacturing a second bracket member, the other end of which is attached to the opposite side of the door member from the door hinge, the method comprising: feeding one strip-shaped sheet metal onto a manufacturing line and sequentially transferring the same on the manufacturing line. A processing step of performing processing according to the first bracket member and the second bracket member on required portions of the band-shaped sheet metal by using a plurality of types of machine tools sequentially provided on the manufacturing line; A separating step of separating the first bracket member and the second bracket member from the band-shaped sheet metal by cutting the band-shaped sheet metal portion processed in the step; And having a side door impact method for producing a bar bracket.