JP5092777B2 - Connection structure of the rear end of the rocker and the lower end of the rear pillar of an automobile - Google Patents

Description

  The present invention relates to a joint structure of a rear end portion of a rocker extending along a lower edge of a door opening on a side surface of an automobile and a lower end portion of a rear pillar that rises upward integrally with a front end of a rear wheel house.

  As shown in FIG. 3, in general, an automobile forms a rear end portion of a rocker 1 extending in the front-rear direction along the lower edges of front and rear door openings 9a and 9b formed on the side surface of the vehicle body, and a rear edge of the rear door opening 9b. The rear pillar 6 is connected to the lower end of the rear pillar 6. As shown in FIGS. 4 and 5, the general portion of the rocker 1 has a closed cross section with a rocker outer plate 10 and a rocker inner plate 11. A rocker reinforcement 2 for partitioning inward and outward is provided. The lower end portion of the rear pillar 6 is formed integrally with the front edge portion of the rear wheel house 7, and forms a closed cross section between the pillar outer plate 60 and the front portion of the wheel house outer plate 70 formed in an arch shape. The rear end portion of the rocker 1 and the lower end portion of the rear pillar 6 are coupled in a substantially L shape having a closed cross section communicating with each other.

  By the way, at the time of frontal collision of the vehicle, a pitching phenomenon occurs in which the rear part of the vehicle body jumps up due to the impact of the collision. In particular, in the offset frontal collision, the connecting part between the rear end part of the rocker 1 on the collision side and the lower end part of the rear pillar 6 6 may be deformed forward (white arrow in FIG. 3). When the rear pillar is tilted forward, the entire vehicle body is deformed, not just the front end of the vehicle body. Therefore, conventionally, a coupling portion reinforcement or the like is provided in the coupling portion to reinforce (for example, see Patent Document 1).

10 and 11 show a typical representative reinforcing structure. In FIG. 10, the locker outer plate and the pillar outer plate are omitted, and only the internal structure of the coupling portion is shown. In the coupling portion, a coupling portion reinforcement 3K is provided on the vehicle outer side of the rear end portion 11a of the rocker inner plate. The coupling portion reinforcement 3K has a hat shape in cross section that opens to the inside of the vehicle, and has a substantially L-shaped bent shape in a side view in which the height of the upper surface portion 360 is gradually increased from the rocker 1 side toward the rear pillar 6 side. A reinforcing plate 362 is overlapped and joined to the inner surface of the upper surface portion 360. The coupling portion reinforcement 3K is joined to the rocker inner plate 11 at the upper and lower edges, and forms a closed cross section with the rear end portion 11a of the rocker inner plate, and this closed cross section is directed from the rocker 1 side toward the rear pillar 6. It is made to reinforce a connecting part by communicating. The rear end edge of the coupling portion reinforcement 3 </ b> K is closed at the lower front portion of the wheel house outer plate 70. The vehicle exterior side of the coupling portion is closed by the lower end portion 61 of the rear pillar outer plate so as to cover the coupling portion reinforcement 3K. In Patent Document 1, the reinforcement that reinforces the coupling portion is a rear pillar reinforcement, and the rear pillar is reinforced at the top of the pillar reinforcement while reinforcing the coupling portion.
JP 2006-31358 A

  However, in the conventional reinforcement structure of the joint portion by the joint portion reinforcement 3K, the closed cross-sectional shape by the joint portion reinforcement 3K extends in a series from the rocker side to the rear pillar side, so that it is coupled to the impact at the time of the collision before the offset. The reinforcement effect of the part is not sufficient, and the joint section reinforcement 3K collapses due to a large impact at the time of collision, the joint part is deformed, the rear pillar is tilted forward, and the deformation amount of the vehicle body increases. There was a problem.

Further, as shown in FIG. 12, an impact beam 90 installed in the front-rear direction at the lower portion in the rear door RD that opens and closes the rear door opening is formed at the joint portion between the rear end portion of the rocker 1 and the lower end portion of the rear pillar 6. The rear end is located, and when the door is closed, the coupling portion and the rear end of the impact beam 90 wrap in the vehicle interior / exterior direction.
The impact beam 90 plays a role of reducing the intrusion amount of the rear door RD into the passenger compartment by the front end and the rear end contacting the center pillar and the rear pillar 6 at the time of a side collision of the vehicle and stretching between the two pillars. However, since the connecting portion facing the rear end of the impact beam 90 has a large cross-sectional shape, it cannot be said that the strength against the external force (white arrow in FIG. 11) from the outside of the vehicle is sufficient, and it was pushed into the vehicle inside at the time of a vehicle side collision. When the rear end of the impact beam 90 of the rear door RD hits, the collision load causes the cross-section of the connecting portion to collapse to the inside of the vehicle, and there is a problem that the suppressing effect of suppressing the intrusion of the rear door RD to the inside of the vehicle cannot be exhibited sufficiently was there.

  Therefore, the present invention can efficiently strengthen the joint between the rear end of the rocker and the lower end of the rear pillar, and can prevent the rear pillar from tipping forward without being deformed by a large impact at the time of a frontal collision. An object of the present invention is to realize a structure that reliably receives the rear end of the impact beam of the rear door pushed into the door and prevents the door from entering the vehicle interior.

The present invention is a coupling portion in which a rear end portion of a rocker having a closed cross-sectional structure extending in the front-rear direction along a lower edge of a door opening on a side surface of a vehicle body is coupled to a lower end portion of a rear pillar integrated with a front end of a rear wheel house. In the connecting portion structure of the rocker rear end portion and the rear pillar lower end portion of the closed cross-sectional structure in which the height gradually increases from the rocker side toward the rear pillar side,
The general part of the rocker forms a closed cross section with a rocker outer plate and a rocker inner plate, and a rocker reinforcement that is provided along the rocker outer plate in the closed cross section and partitions the inside of the closed cross section toward the inside and outside of the vehicle. With
The coupling portion is provided with a vertical wall-shaped partition wall that divides the interior into the vehicle outer side and the vehicle inner side,
In the coupling portion, a first reinforcement that forms a lower closed section that is coupled to the lower portion of the outer surface of the partition wall and extends to extend the general portion of the rocker backward with the outer surface of the vehicle, and A coupling reinforcement comprising a second reinforcement that forms an upper closed section that is coupled to an upper portion of the vehicle outer surface and gradually increases in height toward the rear pillar; It has an upper and lower two-layer structure,
And the rear end of the door impact beam installed in the front-rear direction inside the door that opens and closes the door opening at a position corresponding to the upper closed cross section on the vehicle outer side of the coupling portion,
A front end portion of a rear side member extending in the vehicle front-rear direction along the vehicle inner side surface of the rocker inner plate is joined to the vehicle inner side of the coupling portion,
A bulkhead having a closed section with the inner surface of the partition wall is provided between the inner wall of the rocker and the partition wall at a position inside the upper closed section of the vehicle .

Since the closed portion of the upper and lower layers is formed in the connecting portion by the connecting portion reinforcement, the rigidity of the connecting portion can be enhanced as compared with the conventional structure. Further, the linear first reinforcement and the second reinforcement rising rearward can suitably cope with the shape of the coupling portion.
The impact beam, the bulkhead, and the rear side member enhance the rigidity of the coupling portion, and in particular, the rigidity against a collision load acting in the vehicle width direction is exhibited.
By providing the partition wall and connecting the first and second reinforcements thereto, a joint reinforcement having a closed cross-sectional structure of two upper and lower layers can be easily formed.

The first reinforcement has a substantially hat-shaped cross section that opens to the inside of the vehicle, and upper and lower opening edges are joined to the vehicle outer surface of the partition wall to form the lower closed cross section with the partition wall. The second reinforcement is substantially L-shaped in cross section, and one end edge is joined to the upper part of the outer surface of the partition wall and the other end is the upper edge of the first reinforcement on the vehicle exterior. The upper closed section is formed by the partition wall and the upper part of the first reinforcement, and the upper and lower two-layer closed section structure is formed by the partition wall and the first and second reinforcements. ( Claim 2 ).
The partition wall and the first and second reinforcements form a two-layer cross-sectional structure. The first reinforcement is a hat shape, and the second reinforcement is an inverted L shape. Is preferred.

The first reinforcement member and a front edge of said second reinforcement member allowed to joint the rear edge of the rocker reinforcement member (claim 3).
The rigidity of the joint reinforcement is further strengthened by connecting the rocker reinforcement and the joint reinforcement in series.

Further, the present invention is a coupling portion in which the rear end portion of the rocker having a closed cross-sectional structure extending in the front-rear direction along the lower edge of the door opening on the side surface of the vehicle body is coupled to the lower end portion of the rear pillar integrated with the front end of the rear wheel house. In the joint structure of the rocker rear end portion and the rear pillar lower end portion of the closed cross-section structure in which the height gradually increases from the rocker side toward the rear pillar side,
The general part of the rocker forms a closed cross section with a rocker outer plate and a rocker inner plate, and a rocker reinforcement that is provided along the rocker outer plate in the closed cross section and partitions the inside of the closed cross section toward the inside and outside of the vehicle. With
The coupling portion is provided with a vertical wall-shaped partition wall that divides the interior into the vehicle outer side and the vehicle inner side,
On the outer surface of the partition wall, a joint reinforcement that has a hat-shaped cross section that opens to the inside of the vehicle and whose height gradually increases from the rocker side toward the rear pillar side is provided, and the joint reinforcement and the partition wall Forming a closed cross section in the joint,
Within the closed cross section, a plate-like, horizontally extending in the front-rear direction at one of the upper and lower intermediate positions, one end edge is coupled to the vehicle inner surface of the coupling portion reinforcement, and the other edge is coupled to the vehicle inner surface of the partition wall An intermediate wall coupled to the upper and lower layers of the closed cross section that extends so that the general portion of the rocker extends rearward and an upper closed cross section that gradually increases in height toward the rear pillar. With a closed cross-sectional structure of
And the rear end of the door impact beam installed in the front-rear direction inside the door that opens and closes the door opening at a position corresponding to the upper closed cross section on the vehicle outer side of the coupling portion,
A front end portion of a rear side member extending in the vehicle front-rear direction along the vehicle inner side surface of the rocker inner plate is joined to the vehicle inner side of the coupling portion,
Between the rocker inner plate and the partition wall, a bulkhead having a closed cross section with the vehicle inner surface of the partition wall is provided at a position inside the vehicle of the upper closed cross section .

Since the joint portion is composed of two upper and lower closed sections by the joint reinforcement and the intermediate wall, the rigidity of the joint portion can be enhanced compared to the conventional structure. Further, by dividing the interior of the coupling portion reinforcement up and down by an intermediate wall, it is possible to suitably cope with a closed cross-sectional structure of two upper and lower layers.
The impact beam, the bulkhead, and the rear side member enhance the rigidity of the coupling portion, and in particular, the rigidity against a collision load acting in the vehicle width direction is exhibited.
By providing the partition wall and connecting the coupling portion reinforcement and the intermediate wall to the partition wall, a closed cross-sectional structure of two upper and lower layers can be easily formed.

The front edge of the coupling portion reinforcement member and the intermediate wall allowed to joint the rear edge of the rocker reinforcement member (claim 5).
The rigidity of the joint reinforcement is further enhanced.

The bulkhead has a cross-sectional hat shape that opens toward the outside of the vehicle, and the upper opening edge is joined to the inner surface of the partition wall at a position relative to the upper edge of the second reinforcement or the coupling reinforcement. together, allowed to joint the car surfaces of the partition walls of the lower opening edge at a position corresponding to the upper edge or the intermediate wall of said first reinforcement member (claim 6).
The closed section can be suitably formed on the inner side of the coupling portion by the bulkhead, and in particular, the closed section on the inner side of the vehicle and the upper closed section can be combined to exhibit high rigidity against a collision load at the time of a side collision.

  A first embodiment in which the present invention is applied to a joint portion where the rear end portion of the rocker 1 of the vehicle body shown in FIG. 3 and the lower end portion of the rear pillar 6 are joined will be described. The locker 1 extends in the front-rear direction along the lower side edge of the vehicle body, and constitutes the lower opening edge of the front door opening 9a and the rear door opening 9b. As shown in FIG. 4, the general portion of the rocker 1 has an upper edge with a rocker outer plate 10 having a substantially hat-shaped cross section opening to the inside of the vehicle and a rocker inner plate 11 having a substantially hat-shaped cross section opening to the outside of the vehicle. A closed cross-sectional structure is formed by overlapping and welding the flanges on the lower edge.

  A locker reinforcement 2 is provided inside the general portion of the locker 1 to partition the closed cross section in the vehicle interior / exit direction. The rocker reinforcement 2 has a substantially hat-shaped cross section along the inner surface of the rocker outer plate 10, and the upper and lower edge coupling flanges are sandwiched between the upper and lower flanges of the rocker outer plate 10 and the inner plate 11. Welded.

The rear pillar 6 is formed integrally with the quarter panel 91 located behind the rear door opening 9 b, and the lower end portion of the rear pillar 6 is formed integrally with the front edge of the rear wheel house 7. As shown in FIG. 5, the lower end portion of the rear pillar 6 includes a pillar outer plate 60 that is a lower end portion of the front edge of the quarter panel 91 and a front portion of a wheel house outer plate 70 that forms an arch shape of the rear wheel house 7. The inner and outer coupling flanges of the pillar outer plate 60 and the wheel house outer plate 70 are overlapped and welded to form a closed section extending in the longitudinal direction. Reference numeral 71 in FIG. 5 denotes a wheel house inner plate.

Hereinafter, the coupling portion between the lower end portion of the rear end portion and the rear pillar 6 of the rocker 1 of the present invention based on FIGS. 1 to 6 (hereinafter, simply referred to as coupling section) illustrating the structure of. FIG. 1 (A) shows a side view of the inside of the coupling portion, in which both the rocker 1 and the outer plate of the rear pillar 6 are omitted, and FIG. 1 (B) is a cross section taken along line IB-IB in FIG. 1 (A). FIG. FIG. 2 is an exploded perspective view showing constituent members of the coupling portion, in which the outer plate of the rocker 1 is omitted.

  As for the coupling part, the inner plate inside the vehicle is constituted by the rear end portion 11 a of the rocker inner plate 11. The rear end portion 11a of the rocker inner plate 11 is gradually increased upward and downward from the general portion side of the rocker inner plate 11 to the rear, and the upper edge rear end of the rear end portion 11a extends to the rear pillar side. is there. The rocker outer plate 10 and the rocker reinforcement 2 are installed up to a position in front of the rear end portion 11a of the rocker inner plate 11 having a wider vertical width, and extend to the rear coupling portion side. Absent.

  A partition wall 4 having a vertical wall shape is provided on the vehicle outer side of the rear end portion 11a of the rocker inner plate 11 so as to close the opening on the vehicle outer side of the rear end portion 11a. The partition wall 4 is a flat plate having a shape in which the vertical width is gradually enlarged rearward in accordance with the rear end portion 11a, and the upper edge and the lower edge are overlapped with the upper edge and lower edge flanges of the rear end portion 11a. It is welded and the rear end part 11a and the partition wall 4 form the closed cross section in the vehicle inside position of a connection part. The rear end of the closed section of the rear end portion 11a and the partition wall 4 is closed by the front portion of the wheel house inner plate 71 (FIG. 5) of the rear wheel house 7 located behind the rear end portion 11a.

  A coupling portion reinforcement 3 is provided on the outer surface of the partition wall 4. The coupling portion reinforcement 3 forms a two-stage structure with a lower first reinforcement 3a and a second reinforcement 3b, which is separate from the first reinforcement 3a.

  The first reinforcement 3a is formed in a substantially hat-shaped cross section that opens toward the inside of the vehicle in accordance with the cross-sectional shape of the rocker reinforcement 2, and includes a vertical width on the front end side and a vertical width on the rear end side. Are substantially linearly extended in the front-rear direction so as to have substantially the same width.

  The first reinforcement 3 a has an upper edge coupling flange 30 overlapped and welded to the vehicle outer surface at the upper and lower intermediate positions of the partition wall 4, and a lower edge coupling flange 31 is connected to the vehicle outer surface of the lower edge of the partition wall 4. Are overlapped with the lower edge of the partition wall 4 and the lower edge coupling flange of the rear end portion 11a of the rocker inner plate and are integrally welded to form a closed section D with the lower portion of the partition wall 4.

  The first reinforcement 3a has a front end edge 34a connected to the rear end edge 23 of the rocker reinforcement 2 so that the lower closed section D has an inner plate 11 of the rocker 1 general part and a rocker reinforcement. 2 is communicated with the outer half of the closed cross section consisting of 2 and the rear outer half of the closed cross section on the rocker side is extended rearward.

  The second reinforcement 3b installed immediately above the first reinforcement 3a has substantially the same lateral width in the vehicle width direction as the upper surface 32 of the first reinforcement 3a, and the upper surface in the front-rear direction. The length is almost the same as or slightly shorter than 32. The second reinforcement 3b includes a side wall 35 having a vertical wall shape on the outer side of the vehicle, and has a substantially inverted L-shaped cross section with an upper wall 36 that bends from the upper edge and projects toward the inner side of the vehicle. The upper edge of the side wall 35 is gradually increased from the front side to the rear side corresponding to the upper edge of the partition wall 4, and the vertical width of the rear end of the side wall 35 is increased upward. The upper wall 36 bent along the upper edge of the side wall 35 forms an inclined surface that is gently inclined rearward and upward.

  The second reinforcement 3b is provided with a coupling flange 37 bent upward along the side edge on the vehicle inner side of the upper wall 36, and the lower edge of the side wall 35 has a first flange along the first flange 3b. A joint portion 38 corresponding to the upper edge of the side surface portion 33 of the reinforcement 3a is provided. Note that the rear half of the joint portion 38 is aligned with the rear edge of the upper edge of the side portion 33 of the first reinforcement 3a that is slightly wider to the vehicle outer side than the width of the second reinforcement 3b. The bulge is formed.

  The second reinforcement 3b is formed by superimposing and welding the upper flange flange 37 along the upper edge of the partition wall 4 along the upper edge of the partition wall 4 and also welding the first reinforcement 3a. The upper surface portion 32 is covered, and the joint portion 38 at the lower edge of the side wall 35 is overlapped and welded along the upper outer edge of the side surface portion 33 of the first reinforcement 3a. As a result, the second reinforcement 3b forms a closed section E with the partition wall 4 and the upper surface portion 32 of the first reinforcement 3a. As a result, the joint reinforcement 3 composed of the first and second reinforcements 3a and 3b forms a closed sectional structure of two upper and lower layers by the lower and upper closed sections D and E of the reinforcements 3a and 3b. It is.

  The front edge 34b of the second reinforcement 3b is overlapped with the front end of the upper surface portion 32 of the first reinforcement 3a at or near the connecting portion of the first reinforcement 3a and the rocker reinforcement 2. And the front end of the closed section E is closed. The side view shape of the closed cross section E is formed so that the height dimension is gradually increased from the rocker 1 side toward the rear pillar 6 side and is expanded toward the pillar 6 side.

  The rear ends of both closed sections D and E arranged vertically are closed at the front surface of the wheel house outer plate 70. That is, the first reinforcement 3a welds the coupling flange 39a formed at the rear edge of the upper surface portion 32 to the vicinity of the lower end of the front surface portion of the wheel house outer plate 70, and the coupling portion 39b at the rear edge of the side surface portion 33 to the wheel. It is welded to the side edge flange on the vehicle outer side of the front portion of the house skin 70. In the second reinforcement 3b, a coupling flange 39c formed at the rear edges of the side wall 35 and the upper wall 36 is welded to an upper and lower intermediate position of the front surface portion of the wheel house outer plate 70.

  At the joint between the rocker 1 and the rear pillar 6, the outer plate on the outside of the vehicle is composed of a lower end portion 61 that is bent from the lower end of the rear pillar outer plate 60 and has a terminal that extends forward, and is substantially L-shaped in side view. The first and second reinforcements 3a and 3b are covered by the lower end 61. The cross-sectional shape of the lower end portion 61 is matched with the cross-sectional shape of the rocker outer plate 10 (FIG. 4) of the rocker 1 general portion. The lower end 61 welds the upper edge coupling flange 611 integrally with the upper edge of the rear end portion 11a of the rocker inner plate 11, the upper edge of the partition wall 4, and the coupling portion, and also lowers the lower edge coupling flange 612. The end 11a and the lower edge of the partition wall 4 are welded integrally with the lower edge coupling flange 31 of the first reinforcement 3a, and the front end edge of the lower end 61 is joined to the rear edge of the rocker outer plate. is there.

According to the above structure , the coupling portion reinforcement 3 that reinforces the coupling portion between the rear end of the rocker 1 and the lower end of the rear pillar 6 is constituted by the upper and lower two-stage first and second reinforcements 3a and 3b. Thus, since the upper and lower two layers of closed cross sections D and E are formed, each closed cross section D and E can be reduced in size as compared with the closed cross section of the conventional joint reinforcement 3K. Further, the lower closed section D below is formed so that the closed section of the rocker 1 general section communicates linearly rearward, and the upper closed section E is formed so as to project to the rear pillar 6 side. D and E match the internal shape of the joint. Therefore, the rigidity of the coupling portion against an impact at the time of a vehicle collision can be strengthened, and the rear pillar 6 can be prevented from being deformed forward even by a large impact such as an offset frontal collision of the vehicle.

In the joint portion, a partition wall 4 made of a flat plate is provided outside the rear end portion 11a of the rocker inner plate 11 having a hat-shaped cross section, and the first and second reinforcements 3a and 3b are joined to the partition wall 4, respectively. Therefore, these panel configurations can be simplified, the joining work of the reinforcements 3a and 3b to the partition wall 4 can be facilitated, and the closed sections D and E having two upper and lower layers can be preferably formed. Further, the rear end portion 11a of the rocker inner plate 11 and the partition wall 4 can form a closed cross section on the vehicle inner side of the coupling portion, and this, together with the closed cross sections D and E on the vehicle outer side, provide a higher reinforcing effect on the coupling portion. Is done.
In addition, since the lower and upper closed cross sections D and E are small in cross-sectional shape, the rigidity against the impact of the frontal collision and the rigidity against the impact acting in the vehicle width direction at the time of the vehicle side collision are improved.

FIG. 6 shows the overall structure of the first embodiment of the present invention which is more effective than the above-described structure against the impact of a side collision. The basic structure of the present embodiment is almost the same as the above-described structure, and differences will be mainly described. In FIG. 6, the same members are denoted by the same reference numerals, and description thereof is omitted.
A rear door RD that opens and closes the rear door opening is formed on the vehicle outer side of the locker 1 on the vehicle outer side of the upper closed section E formed by the partition wall 4 and the upper surface portion of the first reinforcement 3a and the second reinforcement 3b. The rear end of the impact beam 90 installed in the front-rear direction is disposed so as to face the in-vehicle direction.

  A front end portion of a rear side member 80 extending in the vehicle front-rear direction is joined to the vehicle inner side of the rocker 1 along the upper half portion of the rear end portion 11a of the rocker inner plate. The rear side member 80 has a substantially inverted hat shape in cross section, and the left and right upper edge flanges are coupled to the lower surface of the passenger compartment floor 81 to form a closed sectional structure with the passenger compartment floor 81. The rear side member 80 has a front side outer side surface coupled to the upper half of the rear end portion 11a of the rocker inner plate.

Then, the upper half of the closed cross section composed of the partition wall 4 of the rocker 1 and the rear end portion 11 a of the rocker inner plate is closed by the partition wall 4 between the upper closed cross section E and the front end portion of the rear side member 80. A bulkhead 5 forming a cross section F is installed. The bulkhead 5 has a hat-shaped cross section that opens toward the outside of the vehicle, and includes an upper wall 51, a lower wall 52, and a side wall 53 that vertically connects the inner edges of the vehicle.
The bulkhead 5 has a rear end portion of the rocker inner plate at the upper part of the inner surface of the partition wall 4 at a position where the upper flange flange 54 faces the upper flange flange 37 of the second reinforcement 3b outside the vehicle. 11a and the upper edge flange of the partition wall 4 at a position facing the upper flange flange 30a of the first reinforcement 3a on the vehicle exterior side. It is connected. The side wall 53 of the bulkhead 5 is close to and opposed to the upper half of the rocker inner plate rear end portion 11a.

  When the rear door RD is pushed into the vehicle by the collision partner during a side collision of the vehicle, the rear end of the impact beam 90 in the rear door RD hits the side wall 35 of the second reinforcement 3b. In this case, the upper closed cross section E and the closed cross section F composed of the partition wall 4 and the bulkhead 5 are formed in the interior of the rocker 1 in the vehicle width direction so as to correspond to the collision position of the impact beam 90. The rigidity of the rocker 1 with respect to the collision load from the acting impact beam 90 is high, and the upper surface portion 32 and the upper wall 36 of the first and second reinforcements 3a and 3b of the rocker 1 against the collision load, and further the partition The upper wall 51 and the lower wall 52 of the bulkhead 5 are stretched through the wall 4, so that the collision load can be received on the rear side member 80 side inside the vehicle, and the cross-section collapse of the rocker 1 toward the vehicle inside can be prevented. Accordingly, the rear end of the impact beam 90 can be reliably received by the locker 1, and the rear door RD can be prevented from being deformed to the inside of the vehicle.

Next, a second embodiment of the present invention will be described based on FIG. 7, FIG. 8 , and FIG . The basic structure is substantially the same as that of the first embodiment described above, and the differences will be mainly described. In the drawings, the same members are denoted by the same reference numerals.
7 and 8, the rear end of the rocker 1 is provided with a joint reinforcement 3C having a closed cross section with the partition wall 4 outside the partition wall 4. As shown in FIG. The coupling portion reinforcement 3 </ b> C is formed in a substantially hat-shaped cross section that opens toward the vehicle interior in accordance with the cross-sectional shape of the rocker reinforcement 2, and the vertical width on the front end side is the rear end of the rocker reinforcement 2. The width is almost the same as the top and bottom width.
The side portion 33a of the coupling portion reinforcement 3C is formed so that its upper edge is gradually increased from the front side to the rear side corresponding to the upper edge of the partition wall 4, and the vertical width of the rear end of the side portion 33a is increased upward. It is. The upper surface portion 32a bent toward the vehicle inner side along the upper edge of the side surface portion 33a forms an inclined surface that is gently inclined rearward and upward.

  The joint reinforcement 3C welds the upper flange flange 30a to the outer surface of the vehicle along the upper edge of the partition wall 4, and welds the lower flange flange 31 along the lower edge of the partition wall 4. Thus, a closed section is formed with the partition wall 4. The front end edge 34 of the coupling portion reinforcement 3 </ b> C is connected to the rear end edge 23 of the rocker reinforcement 2. The rear end edge 39 of the joint reinforcement 3C is closed by welding to the front portion of the wheel house skin 70.

  An intermediate wall 3h is provided in the closed cross section of the coupling portion reinforcement 3C and the partition wall 4 so as to partition it vertically. The intermediate wall 3h is a plate body extending substantially horizontally in the front-rear direction. The intermediate wall 3h is positioned in the middle of the joint reinforcement 2 so that the upper surface of the rocker reinforcement 2 extends rearward, and is connected to the outer edge 38a (one edge) of the intermediate wall 3h. The flange is welded to the vehicle inner surface of the coupling portion reinforcement 2 and the coupling flange of the other vehicle inner edge 38b is welded to the middle of the partition wall 4 so that the coupling portion reinforcement 3C and the partition wall 4 The closed cross section is divided into a lower closed cross section D and an upper closed cross section E. The front end edge of the intermediate wall 3h is coupled to the rear end 23 of the rocker reinforcement 2 integrally with the front end edge 34 of the coupling portion reinforcement 3C.

According to the above structure, the same effect as the first embodiment described above is exhibited, and the rigidity of the joint portion between the rear end of the rocker 1 and the lower end of the rear pillar 6 against the load of the frontal collision and the side collision of the vehicle is enhanced. Can do.

FIG. 9 shows the overall structure of the second embodiment of the present invention. In the structure of this embodiment , the bulkhead 5 used in the first embodiment is added to the structure of FIGS. As a structure. The basic structure of this embodiment is almost the same as the structure shown in FIGS.
In the upper half of the closed cross section formed by the partition wall 4 of the rocker 1 and the rear end portion 11a of the rocker inner plate, the bulkhead 5 is connected to the upper flange flange 54 at the upper edge of the joint reinforcement 3C on the vehicle outer side. At the position facing the coupling flange 30a, the upper wall inner surface of the partition wall 4 is coupled integrally with the upper edge flange of the rear end portion 11a of the rocker inner plate, and the lower edge coupling flange 55 is connected to the inner side of the intermediate wall 3h. It is coupled to the vehicle interior intermediate portion of the partition wall 4 at a position facing the end edge 38b.

According to the present embodiment, the same effect as that of the first embodiment described above is exhibited, and the rear end of the impact beam 90 of the rear door RD that is pushed into the inside of the vehicle at the time of a side collision of the vehicle is cross-sectioned at the joint portion of the rocker 1. Receiving reliably without causing collapse, the rear door RD is prevented from being deformed to the inside of the vehicle.

  In any of the first to fourth embodiments, since the outer plate is constituted by the lower end portion 61 of the rear pillar outer plate 60 in the coupling portion between the rocker 1 and the rear pillar 6, the appearance of the coupling portion can be refreshed. And the coupling | bonding with the rear end of the rocker outer plate | board 10 can be made easy. In each embodiment, the lower pillar 61 of the rear pillar outer plate 60 covers the lower edge of the coupling portion. However, in recent years, some vehicles are made of synthetic resin along the lower half of the outer side of the rocker 1. A side skirt member is installed, and in a vehicle in which this type of side skirt member is installed, it is not necessary to cover the lower edge, and the lower half 61 of the rear pillar outer plate 60 covers the upper half of the outer surface of the rocker 1. The lower half may be covered with a side skirt member.

FIG. 1A shows a basic structure of a coupling portion according to a first embodiment of the present invention, and FIG. 1A is a side view of the coupling portion in a state in which both outer plates of a rocker and a rear pillar are omitted, and FIG. These are sectional drawings which follow the IB-IB line of Drawing 1 (A). It is a disassembled perspective view showing the structural member of the coupling | bond part of the said 1st Embodiment . 1 is a schematic side view of a vehicle to which the present invention is applied. FIG. 4 is a cross-sectional view of a general portion of the rocker along line IV-IV in FIG. It is sectional drawing of the lower end part of the rear pillar which follows the VV line of FIG. It is a longitudinal cross-sectional view corresponding to FIG.1 (B) of the whole structure of the 1st Embodiment of this invention. It is a disassembled perspective view corresponding to FIG. 2 of the 2nd Embodiment of this invention. It is a longitudinal cross-sectional view in the position which follows the VIII-VIII line of FIG. It is a longitudinal cross-sectional view corresponding to FIG. 8 of the whole structure of the 2nd Embodiment of this invention. FIG. 3 is an exploded perspective view showing a conventional coupling portion structure corresponding to FIG. 2. It is sectional drawing of the coupling | bond part along the XI-XI line of FIG. It is a schematic side view which shows the periphery of the coupling | bond part at the time of a rear door closing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rocker 10 Rocker outer plate 11 Rocker inner plate 2 Rocker reinforcement 23 Rear end edge 3, 3C Joint portion reinforcement 3a First reinforcement 3b Second reinforcement 30, 30a, 31 Joint flange (upper and lower) Opening edge)
37 Connecting flange (one edge)
38 joint (the other edge)
3h Intermediate wall 38a The outer edge of the intermediate wall (one edge)
38b The inner edge of the intermediate wall (the other edge)
5 Bulkhead 54 Upper Opening Edge 55 Lower Opening Edge 6 Rear Pillar 7 Rear Wheel House 80 Rear Side Member 9a, 9b Door Opening 90 Door Impact Beam D Lower Closed Section E Upper Closed Section F Bulkhead Closed Section

Claims (6)

The rear end portion of the rocker having a closed cross-section structure extending in the front-rear direction along the lower edge of the door opening on the side of the vehicle body is a coupling portion that is coupled to the lower end portion of the rear pillar integrated with the front end of the rear wheel house, In the joint structure of the rocker rear end portion and the rear pillar lower end portion of the closed cross section structure in which the height gradually increases from the rocker side toward the rear pillar side,
The general part of the rocker forms a closed cross section with a rocker outer plate and a rocker inner plate, and a rocker reinforcement that is provided along the rocker outer plate in the closed cross section and partitions the inside of the closed cross section toward the inside and outside of the vehicle. With
The coupling portion is provided with a vertical wall-shaped partition wall that divides the interior into the vehicle outer side and the vehicle inner side,
In the coupling portion, a first reinforcement that forms a lower closed section that is coupled to a lower portion of the outer surface of the partition wall and extends so as to extend the general portion of the rocker rearward with the outer surface of the vehicle, and A coupling reinforcement comprising a second reinforcement that forms an upper closed section that is coupled to an upper portion of the vehicle outer surface and gradually increases in height toward the rear pillar; It has an upper and lower two-layer structure,
And the rear end of the door impact beam installed in the front-rear direction inside the door that opens and closes the door opening at a position corresponding to the upper closed cross section on the vehicle outer side of the coupling portion,
A front end portion of a rear side member extending in the vehicle front-rear direction along the vehicle inner side surface of the rocker inner plate is joined to the vehicle inner side of the coupling portion,
After the locker of the automobile, a bulkhead having a closed cross section with the vehicle inner surface of the partition wall is provided between the inner wall of the locker and the partition wall at a position inside the vehicle of the upper closed cross section. The joint structure of the end and the lower end of the rear pillar. The joint structure of the rear end portion of the rocker and the lower end portion of the rear pillar according to claim 1,
The first reinforcement has a substantially hat-shaped cross section that opens to the inside of the vehicle, and upper and lower opening edges are joined to the outer surface of the partition wall to form the lower closed section with the partition wall;
The second reinforcement is substantially L-shaped in cross section, and one end edge is joined to the upper part of the outer surface of the partition wall and the other end is the upper edge of the first reinforcement on the vehicle exterior. The joint structure of the rear end portion of the rocker and the lower end portion of the rear pillar of the automobile, wherein the upper closed section is formed by the partition wall and the upper portion of the first reinforcement . In the connection part structure of the rocker rear end part and rear pillar lower end part of the automobile according to claim 2,
A joint structure of a rear end portion of a rocker and a lower end portion of a rear pillar , in which front end edges of the first reinforcement and the second reinforcement are joined to a rear end edge of the rocker reinforcement . The rear end portion of the rocker having a closed cross-section structure extending in the front-rear direction along the lower edge of the door opening on the side of the vehicle body is a coupling portion that is coupled to the lower end portion of the rear pillar integrated with the front end of the rear wheel house, In the joint structure of the rocker rear end portion and the rear pillar lower end portion of the closed cross section structure in which the height gradually increases from the rocker side toward the rear pillar side,
The general part of the rocker forms a closed cross section with a rocker outer plate and a rocker inner plate, and a rocker reinforcement that is provided along the rocker outer plate in the closed cross section and partitions the inside of the closed cross section toward the inside and outside of the vehicle. With
The coupling portion is provided with a vertical wall-shaped partition wall that divides the interior into the vehicle outer side and the vehicle inner side,
On the outer surface of the partition wall, a joint reinforcement that has a hat-shaped cross section that opens to the inside of the vehicle and whose height gradually increases from the rocker side toward the rear pillar side is provided, and the joint reinforcement and the partition wall Forming a closed cross section in the joint,
Within the closed cross section, a plate-like, horizontally extending in the front-rear direction at one of the upper and lower intermediate positions, one end edge is coupled to the vehicle inner surface of the coupling portion reinforcement, and the other edge is coupled to the vehicle inner surface of the partition wall An intermediate wall coupled to the upper and lower layers of the closed cross section that extends so that the general portion of the rocker extends rearward and an upper closed cross section that gradually increases in height toward the rear pillar. With a closed cross-sectional structure of
And the rear end of the door impact beam installed in the front-rear direction inside the door that opens and closes the door opening at a position corresponding to the upper closed cross section on the vehicle outer side of the coupling portion,
A front end portion of a rear side member extending in the vehicle front-rear direction along the vehicle inner side surface of the rocker inner plate is joined to the vehicle inner side of the coupling portion,
After the locker of the automobile, a bulkhead having a closed cross section with the vehicle inner surface of the partition wall is provided between the inner wall of the locker and the partition wall at a position inside the vehicle of the upper closed cross section. The joint structure of the end and the lower end of the rear pillar. In the connection part structure of the rocker rear end part and rear pillar lower end part of the automobile according to claim 4,
A connecting portion structure of a rocker rear end portion and a rear pillar lower end portion of an automobile in which the front end edge of the connecting portion reinforcement and the intermediate wall is joined to the rear end edge of the rocker reinforcement . In the connection part structure of the rocker rear end part and rear pillar lower end part of the automobile according to claim 1 or 4 ,
The bulkhead has a cross-sectional hat shape that opens toward the outside of the vehicle, and the upper opening edge is joined to the inner surface of the partition wall at a position relative to the upper edge of the second reinforcement or the coupling reinforcement. With
A connecting portion structure of a rear end portion of a rocker and a lower end portion of a rear pillar in which a lower opening edge is joined to an inner surface of the partition wall at a position corresponding to the upper edge of the first reinforcement or the intermediate wall .

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