JP5339526B2 - Vehicle rear body structure - Google Patents

Description

  The present invention relates to a rear structure of a vehicle body in which inner panels of a roof side rail and a rear pillar are coupled to each other, and an anchor for fastening a seat belt is attached to the inner panel of the rear pillar.

  Conventionally, there is a vehicle body rear structure of the vehicle described in Patent Document 1 below. According to this publication, the rear end portion of the inner panel of the roof side rail extending in the longitudinal direction of the vehicle body and the upper end portion of the inner panel of the rear pillar extending in the vertical direction are coupled to each other, and the seat is attached to the inner panel of the rear pillar. A belt anchor is attached.

  When the vehicle travels, a seated person on the seat in the passenger compartment is normally held on the seat by a seat belt. When the vehicle collides with a certain object located in front of the vehicle while traveling forward (front collision), the seated person tries to move forward from above the seat by the inertial force. Then, first, based on the inertial force, a tensile force is applied to the seat belt toward the front. The tensile force is supported by the inner panel of the rear pillar via the seat belt and an anchor that holds the seat belt. Accordingly, the forward movement of the seat occupant from above the seat is prevented, and the seat occupant is maintained and protected while being restrained on the seat.

JP 2001-63622 A

  By the way, as described above, the tensile force applied to the seat belt at the time of the front collision is supported by the inner panel of the rear pillar via the seat belt and the anchor, but at this time, the roof side rail and the rear pillar Since the joint portion between the inner panels is a portion bent in an inverted L shape in a side view of the vehicle body, stress concentration tends to occur in the joint portion due to the tensile force.

  When a large stress concentration occurs in the joint portion, the joint portion is broken, and the inner panel of the rear pillar is peeled from the inner panel of the roof side rail. Then, the anchor attached to the inner panel of the rear pillar and the seat belt hooked on the anchor both move forward. As a result, there arises an inconvenience that the restraining performance by the seat belt for restraining the seated person on the seat rapidly decreases.

  Therefore, the joint portion between the inner panels of the roof side rail and the rear pillar is reinforced with a separate reinforcing material to prevent the occurrence of stress concentration in the joint portion, thereby preventing breakage of the joint portion. Can be considered. However, simply doing this causes the disadvantage that the number of parts of the rear structure of the vehicle body increases, the configuration becomes complicated, and the mass increases unnecessarily.

  The present invention has been made paying attention to the above-described circumstances, and the object of the present invention is to ensure that the restraining performance of the seat belt that restrains the seated person on the seat at the time of a frontal collision of the vehicle is more reliable and better. It is to be maintained, and this can be achieved with a simple configuration and while suppressing an increase in mass.

In the first aspect of the present invention, the rear end of the inner panel 17 of the roof side rail 6 extending in the front-rear direction of the vehicle body 2 and the upper end of the inner panel 21 of the rear pillar 7 extending in the vertical direction are coupled to each other. In the vehicle body rear structure in which the anchor 30 for securing the seat belt 29 is attached to the inner panel 21 of the vehicle,
The lower part of the rear end portion of the inner panel 17 of the roof side rail 6 extends integrally downward, and the extended portion 26 of the inner panel 17 and the upper portion of the inner panel 21 of the rear pillar 7 are connected to the vehicle body 2. A vehicle body rear structure in which the anchor 30 is attached to the overlapping portion 28 by overlapping and joining each other in the width direction (S3, S4, S6).

  In addition, in this section, the reference numerals and drawing numbers appended to the above terms are not intended to limit the technical scope of the present invention to the “Example” section and the contents of the drawings described later.

  The effects of the present invention are as follows.

According to the first aspect of the present invention, the rear end portion of the inner panel of the roof side rail extending in the longitudinal direction of the vehicle body and the upper end portion of the inner panel of the rear pillar extending in the vertical direction are coupled to each other, and a seat belt is attached to the inner panel of the rear pillar. In the rear body structure of a vehicle with a locking anchor attached,
The lower part of the rear end portion of the inner panel of the roof side rail is integrally extended downward, and the extended portion of the inner panel and the upper portion of the inner panel of the rear pillar are overlapped with each other in the vehicle body width direction. The above-mentioned anchor is attached to this overlapping portion, and the following effects are produced.

  That is, at the time of a frontal collision of the vehicle, a seated person on the seat in the passenger compartment tends to move forward from above the seat due to its inertial force. Then, first, based on the inertial force, a tensile force is applied to the seat belt toward the front. The tensile force is supported by the inner panel of the rear pillar via the seat belt and the anchor that holds the seat belt. At this time, stress concentration due to the tensile force tends to occur at the joint portion between the inner panels of the roof side rail and the rear pillar.

  Here, according to the above invention, the lower portion of the rear end portion of the inner panel of the roof side rail extends integrally downward, and the extended portion of the inner panel and the upper portion of the inner panel of the rear pillar are connected to the vehicle body. Are joined to each other in the width direction, and the anchor is attached to the overlapping portion.

  For this reason, the inner panel of the rear pillar is reinforced over a wide area by forming an overlapping portion by the inner panel of the rear pillar and the extended portion of the inner panel of the roof side rail. And since the said anchor was attached to the said superimposition part, the tensile force given to an anchor via the said seatbelt at the time of a front collision is firmly supported by the said superimposition part.

  In addition, the tensile force at the time of the front collision is applied to the overlapping portion via the anchor, and the extending portion constituting the overlapping portion is located below the rear end portion of the roof side rail. It is formed by extending integrally. For this reason, the tensile force is effectively supported by the roof side rail. And since this roof side rail is extended in the front-back direction, the said tensile force toward the front is firmly supported in the longitudinal direction of the said roof side rail. Therefore, it is possible to prevent stress concentration from occurring due to the tensile force at the joint portion between the inner panels of the roof side rail and the rear pillar.

  As a result, at the time of the front collision, the anchor and the seat belt that is hooked on the anchor are held in that position, so that the restraining performance by the seat belt that restrains the seated person on the seat is more It is reliably maintained well.

  In addition, as described above, the reliable maintenance of the above-described good restraint performance is not achieved by simply reinforcing the connecting portion between the inner panels of the roof side rail and the rear pillar with a separate reinforcing material. This is achieved by extending a part of the inner panel integrally and superimposing the extended part on the inner panel of the rear pillar. Therefore, reliable maintenance of the above-described good restraint performance can be achieved with a simple configuration and while suppressing an increase in mass.

It is the II sectional view taken on the line of FIG. It is a side view of the vehicle body rear part of a vehicle. It is a perspective view of the left part of the vehicle body rear part of a vehicle.

  The vehicle body rear structure of the present invention is to ensure that the restraint performance of the seat belt for restraining the seated person on the seat at the time of a frontal collision of the vehicle is more reliably maintained better, and In order to realize the object of achieving this with a simple configuration and suppressing an increase in mass, a mode for carrying out the present invention is as follows.

  That is, the rear end portion of the inner panel of the roof side rail extending in the front-rear direction of the vehicle body and the upper end portion of the inner panel of the rear pillar extending in the vertical direction are coupled to each other. Is attached. The lower part of the rear end of the inner panel of the roof side rail extends integrally downward, and the extended part of the inner panel and the upper part of the inner panel of the rear pillar are overlapped with each other in the width direction of the vehicle body. The anchor is attached to the overlapping portion.

  In order to explain the present invention in more detail, an embodiment thereof will be described with reference to the accompanying drawings.

  In the figure, reference numeral 1 is a vehicle exemplified by an automobile, and an arrow Fr indicates the front in the traveling direction of the vehicle 1. The left and right described below refer to the width direction of the vehicle 1 toward the front of the vehicle 1.

  The vehicle body 2 of the vehicle 1 is made of sheet metal, and the interior of the vehicle body 2 is a casing 3. The vehicle body 2 extends in the front-rear direction of the vehicle body 2 and is adjacent to the rear of the pair of left and right roof side rails 6 and 6 constituting the left and right upper outer portions of the vehicle body 2, and the roof side rails 6 and 6, respectively. A pair of left and right rear pillars 7, 7 that extend in the vertical direction and constitute the left and right rear outer portions of the vehicle body 2, and a roof panel that spans the left and right roof side rails 6, 6 and forms the upper surface of the vehicle compartment 3. 8 and. The roof side rail 6 and the rear pillar 7 are frame members of the vehicle body 2 and have sufficient strength and rigidity.

  Below the roof side rail 6 and in front of the rear pillar 7 is formed a side door opening 10 that allows the inside and outside of the vehicle compartment 3 to communicate with each other, and a side door 11 that can open and close the door opening 10 is provided. . In addition, a back door opening 12 is formed on the rear surface of the vehicle body 2 so as to be surrounded by the left and right rear pillars 7 and the rear edge of the roof panel 8, and a back door 13 is provided for opening and closing the door opening 12. Yes.

  The roof side rail 6 has an outer and inner panels 16 and 17 facing each other in the width direction of the vehicle body 2, and the upper end edges and the lower end edges of the panels 16 and 17 are spot spots. It is connected by welding S1, S2. Further, the middle portions of the width direction (vertical direction) of both the panels 16 and 17 are separated from each other, whereby the roof side rail 6 has an internal space 18 and has a closed cross-sectional structure.

  On the other hand, the rear pillar 7 has outer and inner panels 20 and 21 that face each other in the width direction of the vehicle body 2, and the front edge portions and the rear edge portions of the panels 20 and 21 are respectively connected to each other. They are connected by spot welding S3, S4. Further, the middle portions of the panels 20 and 21 in the width direction (front-rear direction) are separated from each other, whereby the rear pillar 7 has an internal space 22 and has a closed cross-sectional structure.

  A reinforcing panel 24 for reinforcing the rear pillar 7 is provided between the outer and inner panels 20 and 21 of the rear pillar 7. The front and rear edge portions of the reinforcing panel 24 are sandwiched between the front edge portions of the panels 20 and 21 of the rear pillar 7 and between the rear edge portions, respectively. Connected by S4. The front upper portion 24a of the reinforcing panel 24 extends forward to reinforce the roof side rail 6. The rear upper portion 24b of the reinforcing panel 24 extends inward in the width direction of the vehicle body 2 and reinforces the rear end edge portion of the roof panel 8.

  The lower part of the rear end portion of the inner panel 17 of the roof side rail 6 extends integrally downward. The extending portion 26 of the inner panel 17 is disposed between the upper portion of the inner panel 21 of the rear pillar 7 and the reinforcing panel 24. The front end edge of the extension 26 is sandwiched between the front end edges of the inner panel 21 of the rear pillar 7 and the reinforcing panel 24 and joined by the spot welding S3. The rear end edge is sandwiched between the upper end of the inner panel 21 of the rear pillar 7 and the rear end edge of the reinforcing panel 24 and joined by the spot welding S4. Further, the vertically middle part of the inner panel 21 of the rear pillar 7 and the lower end edge of the reinforcing panel 24 are joined together by spot welding S5 below the lower end edge 26a of the extending part 26.

  In a side view of the vehicle body 2 (FIG. 2), the lower end edge portion 26a of the extending portion 26 linearly extends substantially parallel to the direction in which the tensile force F applied to the seat belt 29 from the seated person at the time of a front collision is directed. It is formed as follows. Further, the inner panel 21 of the rear pillar 7, the reinforcing panel 24, and the lower end edge portion 26a of the extending portion 26 are overlapped with each other and joined by spot welding S6.

  Midway portions in the width direction (front-rear direction) of the inner panel 21, the reinforcing panel 24, and the extension portion 26 of the rear pillar 7 are overlapped with each other in the width direction of the vehicle body 2. A shoulder anchor 30 for latching 29 is attached by a fastener 31. When the vehicle 1 travels, a seated person on the seat at the rear of the passenger compartment 3 is restrained on the seat by the seat belt 29.

  At the time of a frontal collision of the vehicle 1, a seated person on the seat tries to move forward from the seat due to its inertial force. Then, first, based on the inertial force, a tensile force F that is directed forward is applied to the seat belt 29. The tensile force F is supported by the inner panel 21 of the rear pillar 7 through the seat belt 29 and the anchor 30 that holds the seat belt 29. At this time, stress concentration due to the tensile force F tends to occur at the joint portion between the inner panels 17 and 21 of the roof side rail 6 and the rear pillar 7.

  Here, according to the said structure, the lower part of the rear-end part of the inner panel 17 of the roof side rail 6 is extended integrally toward the downward direction, The extension part 26 of this inner panel 17 and the inner panel of the said rear pillar 7 are extended. The upper part of 21 is overlapped and joined to each other in the width direction of the vehicle body 2 (S3, S4, S6), and the anchor 30 is attached to the overlapping part 28.

  For this reason, the inner panel 21 of the rear pillar 7 is reinforced over a wide area by forming the overlapping portion 28 by the inner panel 21 of the rear pillar 7 and the extending portion 26 of the inner panel 17 of the roof side rail 6. Since the anchor 30 is attached to the overlapping portion 28, the tensile force F applied to the anchor 30 via the seat belt 29 at the time of a front collision is firmly supported by the overlapping portion 28.

  In addition, the tensile force F at the time of the front collision is applied to the overlapping portion 28 via the anchor 30, and the extending portion 26 constituting the overlapping portion 28 is provided on the roof side rail 6. It is formed by extending the lower part of the rear end part integrally. For this reason, the tensile force F is effectively supported by the roof side rail 6. Since the roof side rail 6 extends in the front-rear direction, the tensile force F toward the front is firmly supported in the longitudinal direction of the roof side rail 6. Therefore, it is possible to prevent stress concentration from occurring due to the tensile force F at the joint portion between the inner panels 17 and 21 of the roof side rail 6 and the rear pillar 7.

  As a result, the anchor 30 and the seat belt 29 hooked to the anchor 30 are held in that position at the time of the front collision, and therefore the restraint by the seat belt 29 restraining the seated person on the seat. Performance is more reliably maintained better.

  In addition, as described above, the reliable maintenance of the above-described good restraint performance is not simply performed by reinforcing the joint portion between the inner panels 17 and 21 of the roof side rail 6 and the rear pillar 7 with a separate reinforcing material. Further, this is achieved by extending a part of the inner panel 17 of the roof side rail 6 integrally and superimposing the extending part 26 on the inner panel 21 of the rear pillar 7. Therefore, reliable maintenance of the above-described good restraint performance can be achieved with a simple configuration and while suppressing an increase in mass.

  Further, according to the above configuration, the lower end edge portion 26a of the extending portion 26 is substantially parallel to the direction of the tensile force F applied to the seat belt 29 at the time of a front collision in a side view of the vehicle body 2 (FIG. 2). It is formed to become.

  For this reason, when the tensile force F at the time of the front collision is applied to the lower end edge portion 26a side of the extension portion 26, the tensile force F is caused by each portion in the longitudinal direction of the lower end edge portion 26a of the extension portion 26. , More evenly supported. Therefore, it is possible to prevent stress concentration from occurring in a part of the lower end edge part 26 a of the extension part 26 and to easily deform this part, and the tensile force F is strengthened by the extension part 26. Supported by As a result, the restraining performance by the seat belt 29 at the time of the above-described front collision is more reliably maintained better.

  Although the above is based on the illustrated example, the reinforcing panel 24 may not be provided. Further, spot welding S5 and S6 may not be performed.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Car body 3 Car compartment 6 Roof side rail 7 Rear pillar 8 Roof panel 16 Outer panel 17 Inner panel 18 Internal space 20 Outer panel 21 Inner panel 22 Internal space 24 Reinforcement panel 26 Extension part 26a Lower end edge part 28 Overlapping part 29 Seat belt 30 Anchor 31 Fastener F Tensile force S Spot welding

Claims (1)

The rear end of the inner panel of the roof side rail that extends in the longitudinal direction of the vehicle body and the upper end of the inner panel of the rear pillar that extends in the vertical direction are connected to each other, and an anchor for securing the seat belt is attached to the inner panel of the rear pillar. In the rear structure of the vehicle body,
The lower part of the rear end portion of the inner panel of the roof side rail is integrally extended downward, and the extended portion of the inner panel and the upper portion of the inner panel of the rear pillar are overlapped with each other in the vehicle body width direction. A vehicle body rear structure, characterized in that the anchor is attached to the overlapping portion.

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