JP2008074125A - Pillar reinforcing structure of automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently improve rigidity around a seatbelt anchor relative to a seatbelt load of a pillar of an automobile by a small member suppressed in weight increase. <P>SOLUTION: In this pillar reinforcing structure, an anchor 4 provided with a shoulder anchor plate of a seatbelt constraining an occupant is installed to the compartment face 12 of an inner panel 1 formed into an approximate L-shaped cross section by a front face 11 facing the compartment front side of a pillar P2 of an automobile and a compartment face 12 facing a compartment central side in a vehicle width direction. In the pillar, at a position immediately under the anchor 4 and at an approximate triangular plate-like shape, a first side 51 is coupled with the front face 11, and a second side 52 is coupled with the compartment face 12. A third side 53 diagonally traverses in the pillar 2. A bulk head 5 dividing a portion along the inner panel 1 in the pillar into upper and lower parts is mounted so as to prevent the deformation of a bent angle between the front face 11 and the compartment face 12 of the inner panel 1 against the seatbelt load. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a structure for reinforcing a pillar of an automobile, particularly a pillar for attaching a shoulder anchor plate of a seat belt for restraining an occupant.

  2. Description of the Related Art Conventionally, as a pillar reinforcing structure for automobiles, in pillars and the like, an inner reinforcement along the inner surface of the inner panel and an outer panel liner along the inner surface of the outer panel are disposed in the longitudinal direction of the pillar in a closed cross section composed of the inner panel and the outer panel. The pillar rigidity is strengthened against the side collision of the vehicle by providing a force to make the pillar cross section multi-layered in the vehicle width direction or by providing a plurality of bulkheads that partition the pillar cross section in the vertical direction ( For example, see Patent Document 1.)

  As shown in FIG. 4, in a wagon or the like in which a second seat S1 and a third seat S2 are installed at the rear part of the passenger compartment, the shoulder anchor plate 9 of the seat belt SB that restrains the occupant of each seat on the intermediate pillar P1 and the rear pillar P2 is provided. Installed. The seat belt anchor plate 9 is made of a metal plate, and a slit 91 through which the seat belt SB is inserted in a folded shape is formed at one end, and a bolt hole for bolting the seat belt anchor plate 9 to the pillars P1 and P2 at the other end. 92 is formed.

  By the way, in the intermediate pillar P1, the rigidity of the entire pillar is strengthened in preparation for a side collision as described above. Therefore, the intermediate pillar P1 has sufficient rigidity against the seat belt load applied to the shoulder anchor plate 9 when the vehicle suddenly decelerates. The rear pillar P2, which is exerted but is not easily affected by the side collision, does not reinforce the entire pillar like the intermediate pillar P1, but partially reinforces the periphery of the shoulder anchor plate 9.

  5, 6 and 7 show a reinforcing structure around the shoulder anchor plate 9 of the conventional rear pillar. As shown in FIGS. 5 and 6, the rear pillar P <b> 2 is an inner panel 1 having a substantially L-shaped cross section with a front surface portion 11 facing the front side of the vehicle interior and a vehicle interior surface portion 12 facing the vehicle width direction center of the vehicle interior. And an inner panel extension member 10 which is a separate member extending forward from the inner panel 1, an outer panel 2 surrounding the outside of the vehicle, and an outer panel extension member 20 which is a separate member constituting the side edge of the back door opening. Eggplant. The rear pillar P2 is formed with a width dimension along the vehicle width direction of the front half of the pillar smaller than that of the rear half so as to route an air conditioning duct (not shown) along the surface of the front half of the passenger compartment. Is secured.

  In the closed cross section of the rear pillar P2, there is provided a reinforcement 3 which is opposed to the inner panel 1 and forms a substantially square closed cross section with the inner panel 1. The inner panel 1 is reinforced on the front surface portion 11 and the rear surface side of the vehicle compartment surface portion 12 by overlapping a reinforcing plate 7 having a substantially L-shaped cross section along these, and the shoulder anchor plate 9 is provided on the reinforcing portion. An anchor portion 4 is formed to fasten.

In the anchor portion 4, a metal plate anchor bracket 42 provided with a weld nut 41 is superposed on the back surface of the reinforcing plate 7 along the vehicle compartment surface portion 12, and a through hole concentric with the weld nut 41 is formed in the vehicle compartment surface portion 12 and the reinforcing plate 7. 40 is formed. As a fastening structure of the shoulder anchor plate 9, for example, as shown in FIG. 7, a collar 95 is arranged between the shoulder anchor plate 9 and the passenger compartment surface portion 12, and the bolt 96 is extended from the bolt hole 92 of the plate 9 to the collar 95. A structure is adopted in which the tip of the bolt 96 is inserted and fastened to the weld nut 41.
Japanese Patent Laid-Open No. 9-20267

  When the vehicle suddenly decelerates, if a large forward pulling load (white arrow H in FIG. 6) is applied to the anchor part 4 via the shoulder anchor plate 9 on the rear pillar P2, the passenger compartment surface part 12 of the inner panel 1 is pulled forward. As a result, the bending angle of the bent portion between the front surface portion 11 and the vehicle compartment surface portion 12 is changed to an acute angle, and the closed cross section of the rear pillar P2 collapses to the front side (imaginary line in FIG. 6). On the other hand, in the conventional reinforcing structure in which the reinforcing plate 7 is superimposed on the inner surface of the inner panel 1, the bending portion of the inner panel 1 cannot be prevented from being deformed unless the thickness of the reinforcing plate 7 is sufficiently increased. When the plate thickness of the reinforcing plate 7 is increased, the weight increases accordingly.

  Accordingly, the present invention has been made with the object of providing a pillar reinforcing structure that can effectively prevent the collapse of the cross section of the pillar against a seat belt load acting forward through the shoulder anchor plate with minimal weight increase. It is a thing.

  The present invention is a pillar of an automobile having an inner panel and an outer panel having a closed cross section, and has a substantially L-shaped cross section with a front face portion facing the front side of the passenger compartment and a passenger compartment face portion facing the center of the compartment in the vehicle width direction. In the pillar reinforcing structure in which an anchor portion for attaching a shoulder anchor plate of a seat belt for restraining an occupant is installed on the passenger compartment surface portion of the inner panel, the inside of the pillar is located immediately below the anchor portion. A substantially triangular plate-like shape, the first side is coupled to the front surface portion, the second side is coupled to the vehicle compartment surface portion, the third side is obliquely traversing the pillar, A bulkhead for attaching a part along the inner panel of the pillar up and down is attached (Claim 1). Since the seat belt load acts in a direction almost along the plate surface of the bulkhead, the planar shape of the bulkhead does not change, so the bending angle between the front part of the inner panel and the passenger compartment surface part does not change, and the cross section of the pillar Prevent collapse. The bulkhead may be a thin metal plate, and the bulkhead has a triangular shape that matches the cross-sectional shape of the inner panel, so that it is effective in preventing deformation of the inner panel. Lightweight.

  In the bulkhead, the length of the first side is matched with the width of the front surface of the inner panel, the length of the second side is matched with the width of the vehicle compartment surface, and the third side The side is configured to connect the side end of the front surface outside the vehicle and the rear end of the passenger compartment surface in a substantially straight line (Claim 2). Since the front portion of the inner panel and the passenger compartment surface portion are coupled over the entire width by the bulkhead, the pillar cross-section collapse due to the seat belt load is surely prevented.

  The bulkhead is provided inside a rear pillar to which a shoulder anchor plate of a seat belt for restraining an occupant seated on a third seat such as a wagon car is attached. In a rear pillar that does not require much reinforcing structure against vehicle side collision, it is suitable as a reinforcing structure against seat belt load.

  An embodiment in which the present invention is applied to a rear pillar P2 of a wagon car or the like will be described with reference to FIGS. The inner panel 1 constituting the rear pillar P2 extends in the vehicle width direction and faces the front side of the vehicle compartment, and bends substantially at right angles from the side edge on the vehicle inner side and extends rearward to the vehicle width direction vehicle center side. The cross section is substantially L-shaped with the facing vehicle compartment surface portion 12. The inner panel 1 is provided with an inner panel extending member 10 that extends forward from a side edge of the front surface portion 11 on the vehicle outer side. The rear edge of the inner panel extending member 10 is overlap welded to a coupling flange at the side end of the inner side of the front panel 11 of the inner panel 1 and extends forward of the inner panel 1.

  The outer panel 2 on the vehicle outer side extends rearward from the joint portion coupled to the front edge of the inner panel extension member 10 so as to cover the vehicle outer side of the inner panel extension member 10 and the inner panel 1, and the rear end gently extends in the vehicle width direction vehicle. Curved to the center. On the rear edge of the outer panel 2, an outer panel extending member 20 that is formed of a member different from the outer panel 2 and that forms a side edge of the door opening is provided. The outer panel extension member 20 has a rear edge coupled to the rear edge of the outer panel 2 and extends forward, and has a substantially L-shaped cross section that bends inward in the vehicle width direction from the front edge. Polymerization welding is performed on the rear edge of the surface portion 12.

  The rear pillar P2 configured in this way forms a closed cross-sectional structure with the inner panel 1, the outer panel 2, and the extension members 10 and 20. The rear pillar P2 has a cross-sectional width along the vehicle width direction of the front half of the pillar composed of the inner panel extension member 10 and the front half of the outer panel 2, and the cross section of the rear half of the pillar composed of the inner panel 1 and the rear half of the outer panel 2. It is narrower than the width, and a recess opening forward and toward the passenger compartment is provided on the passenger compartment surface side of the first half of the pillar, and an air conditioning duct (not shown) is routed along the recess.

  In the rear pillar P <b> 2, a reinforcement 3 having a substantially inverted L-shaped cross section that forms a substantially rectangular closed cross section with the inner panel 1 is provided facing the inner panel 1. The reinforcement 3 has one end integrally welded to the joint between the inner panel 1 and the extension member 10, and the other end integrally joined to the joint between the inner panel 1 and the outer panel extension member 20. .

  The rear pillar P2 is provided with an anchor portion 4 provided with a screw hole for fastening and fastening a shoulder anchor plate (9 in FIG. 4) of a seat belt for restraining an occupant seated on the third seat on the passenger compartment surface portion 12 of the inner panel 1. It is. The anchor portion 4 is provided with a bolt through-hole 40 in the vehicle compartment surface portion 12, and a plate-like anchor bracket 42 having a weld nut 41 is welded around the bolt through-hole 40 on the back surface of the vehicle compartment surface portion 12. The through hole 40 and the weld nut 41 are provided concentrically. As a mounting structure of the shoulder anchor plate 9, a structure similar to the structure shown in FIG. 7 and described above can be used.

  The rear pillar P2 is provided with a bulkhead 5 that divides the closed section of the inner panel 1 and the reinforcement 3 in the vertical direction immediately below the anchor portion 4. The bulkhead 5 is a plate having a substantially triangular shape, and the first side 51 and the second side 52 which is substantially L-shaped with the first side 51 are respectively bent flanges which are bent downward. Is formed in a series. A reinforcing flange bent upward is formed on the third side 53 that connects the ends of the first and second sides 51 and 52.

  In the bulkhead 5, the length of the first side 51 is substantially the same as the width of the front portion 11 of the inner panel 1, and the length of the second side 52 is substantially the same as the width of the vehicle compartment surface portion 12. In addition, the bending angle of the corner portion between the first and second side edges 51 and 52 is formed in accordance with the bending angle between the front surface portion 11 and the vehicle compartment surface portion 12. The bending angle between the front surface portion 11 and the vehicle compartment surface portion 12 is set at a substantially right angle, and the plate surface of the bulkhead 5 is a substantially right triangle.

  In the bulkhead 5, the coupling flange of the first side 51 is superimposed on the inner surface of the front surface portion 11 of the inner panel 1 and welded, and the coupling flange of the second side 52 is superimposed on the inner surface of the vehicle compartment surface portion 12. The inner panel 1 side in the closed cross section of the inner panel 1 and reinforcement 3 is installed so as to be vertically partitioned.

  According to the present embodiment, when a forward seat belt load (white arrow H) acts on the anchor portion 4 via the shoulder anchor plate of the seat belt during sudden deceleration of the vehicle, the load H is the plate surface of the bulkhead 5. Therefore, the planar shape of the bulkhead does not change. Therefore, the bending angle between the front surface portion 11 and the vehicle compartment surface portion 12 of the inner panel 1 coupled to the first side edge 51 and the second side edge 52 does not change, and deformation of the inner panel 1 is suppressed. . Thereby, the cross-section collapse of the pillar can be prevented.

  Since the bulkhead 5 has joined the front part 11 and the compartment surface part 12 of the inner panel 1 over the whole width direction by the 1st and 2nd side 51,52, the inner panel 1 of the inner belt 1 by the seatbelt load H is ensured. Deformation can be suppressed.

  Since the bulkhead 5 receives the seat belt load H along the surface direction, the inner panel 1 can be prevented from being deformed by a relatively thin metal plate compared to the conventional reinforcing plate 7. In addition, among the closed cross section formed by the inner panel 1 and the reinforcement 3 for the bulkhead 5, an inner panel equivalent to the bulkhead that partitions the entire closed cross section is formed in a triangular shape that divides the half on the inner panel 1 side. The deformation preventing effect is exhibited, and the bulkhead 5 can be made small and light.

  In addition, the above-mentioned embodiment does not limit the scope of the present invention, and the present invention includes a design change of the above-described embodiment. In the above-described embodiment, the bulkhead of the present invention is provided in the rear pillar. However, the present invention is not limited to this and may be applied to an intermediate pillar or the like. However, the intermediate pillars and the like are particularly suitable for reinforcing the rear pillars having generally lower rigidity than the intermediate pillars because the rigidity of the entire pillars is increased in preparation for a side collision of the vehicle.

It is a side view of the rear pillar to which the pillar reinforcing structure of the present invention is applied. It is sectional drawing which follows the II-II line of FIG. It is a perspective view of the bulkhead used for this invention. It is a schematic side view of the vehicle compartment rear part of a wagon car. It is a side view of the rear pillar which shows the conventional pillar reinforcement structure. It is sectional drawing which follows the VI-VI line of FIG. It is principal part sectional drawing of FIG. 6 in the state which attached the shoulder anchor plate.

Explanation of symbols

P2 Rear pillar (pillar)
DESCRIPTION OF SYMBOLS 1 Inner panel 11 Front part 12 Car compartment surface part 2 Outer panel 3 Reinforcement 4 Anchor part 5 Bulk head 51 1st side edge 52 2nd side edge 53 3rd side edge SB Seat belt 9 Shoulder anchor plate S1 Second seat S2 Third sheet

Claims (3)

An automobile pillar having a closed cross section with an inner panel and an outer panel,
A seat belt shoulder anchor that restrains an occupant on the vehicle compartment surface portion of the inner panel having a substantially L-shaped cross section with a front surface portion facing the front side of the vehicle compartment and a vehicle compartment surface portion facing the vehicle center in the vehicle width direction. In the reinforcement structure of the pillar where the anchor part to install the plate is installed,
Within the pillar, in a position directly below the anchor portion, in a substantially triangular plate shape, the first side is coupled to the front surface, the second side is coupled to the vehicle compartment surface, 3. A pillar reinforcement structure for an automobile, wherein a bulkhead is attached to each side of the pillar diagonally across the pillar, and a part along the inner panel of the pillar is vertically divided.   In the bulkhead, the length of the first side is matched with the width of the front surface of the inner panel, the length of the second side is matched with the width of the vehicle compartment surface, and the third side The pillar reinforcing structure for an automobile according to claim 1, wherein a side has a structure in which a side of the front portion of the vehicle exterior side and a rear end of the compartment surface portion are connected substantially linearly.   The pillar reinforcement structure for an automobile according to claim 1 or 2, wherein the bulkhead is provided inside a rear pillar for attaching a shoulder anchor plate of a seat belt for restraining an occupant seated on a third seat such as a wagon car.