JP2011025848A - Vehicle body rear structure of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reliably and better maintain the restraining performance of a seat belt for restraining a person seated on a seat in a head-on collision of a vehicle with a simple constitution while suppressing any increase of the mass. <P>SOLUTION: In a vehicle body rear structure, front and rear edges 16a, 17a, 16b, 17b of outer and inner panels 16, 17 of a rear pillar 6 are subjected to the spot welding S1, S2 to each other at a plurality of points. An anchor 22 for hooking a seat belt 21 is mounted on the inner panel 17. A reinforcing panel 27 for reinforcing an anchor mounting part 26 of the inner panel 17 is mounted on the rear pillar 6. A bent part 32 which extends orthogonally across the direction of the tensile force F to be applied to a seat belt 21 during the head-on collision and has a cross section of each part in its longitudinal direction of a bent shape is formed on a part of the inner panel 17 and/or a part of the reinforcing panel 27 between the rear edges 16b, 17b of the outer and inner panels 16, 17 and the anchor mounting part 26 in side view of a vehicle body 2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicle body rear part structure in which an anchor for fastening a seat belt is attached to a rear pillar constituting a rear side part of a vehicle body.

  Conventionally, there is a vehicle body rear structure of the vehicle described in Patent Document 1 below. According to this, the rear pillar which comprises the rear side part of a vehicle body has an outer and an inner panel which extend long in the up-down direction and face each other in the width direction of the vehicle body. The front and rear edge portions of the outer and inner panels are spot-welded to each other at a plurality of points in the vertical direction so that an internal space is generated between the outer and inner panels. An anchor for fastening the seat belt is attached to the inner panel. Further, a reinforcing panel that is disposed in the internal space and reinforces an anchor mounting portion of the anchor to the inner panel is attached to the rear pillar.

  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 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 11-49030 A

  By the way, as described above, at the time of the front collision, the tensile force applied to the seat belt is supported by the anchor mounting portion of the inner panel of the rear pillar via the seat belt and the anchor. The stress concentration due to the tensile force tends to occur in the rear edge portion of the inner panel at the rear of the inner panel.

  In this case, due to the stress concentration, spot welding that joins the rear end edge portion of the inner panel and the rear end edge portion of the outer panel to each other breaks, and the inner panel starts from the rear end edge portion of the outer panel. Assume that the rear edge of the panel is peeled off. Then, the rear edge of the inner panel is rapidly and greatly plastically deformed forward by the tensile force, and the anchor attached to the anchor mounting portion of the inner panel and the anchor Both of the seat belts that are hooked 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, it is conceivable to reinforce the rear end edge portion of the inner panel behind the anchor mounting portion with some reinforcing material to prevent the stress concentration and thus prevent the peeling. 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 invention, the rear pillar 6 constituting the rear side portion of the vehicle body 2 has outer and inner panels 16 and 17 that extend in the vertical direction and face each other in the width direction of the vehicle body 2. The front and rear edge portions 16a, 17a, 16b, and 17b of the panels 16 and 17 are spot welded S1 and S2 to each other at a plurality of points in the vertical direction, and the anchor 22 for securing the seat belt 21 is attached to the inner panel 17 In the vehicle body rear part structure in which the reinforcing panel 27 for reinforcing the anchor attaching portion 26 of the anchor 22 to the inner panel 17 is attached to the rear pillar 6,
In the side view of the vehicle body 2, the inner panel 17 and / or the reinforcing panel 27 between the rear end edge portions 16 b and 17 b of the outer and inner panels 16 and 17 and the anchor mounting portion 26, A vehicle having a bent portion 32 that extends perpendicularly to the direction of the tensile force F applied to the seat belt 21 at the time of a front collision and has a bent cross section in the longitudinal direction thereof. It is a vehicle body rear structure.

  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 pillar that constitutes the rear side portion of the vehicle body has an outer and an inner panel that extend in the vertical direction and face each other in the width direction of the vehicle body. The front and rear ends of these outer and inner panels Edges are spot welded to each other at a plurality of points in the vertical direction, anchors for seat belt fastening are attached to the inner panel, and a reinforcing panel for reinforcing the anchor attaching portion of the anchor to the inner panel is attached to the rear pillar. In the rear structure of the vehicle body,
In the side view of the vehicle body, the tension applied to the seat belt at the time of a front collision is applied to the inner panel portion and / or the reinforcement panel portion between the rear edge portions of the outer and inner panels and the anchor mounting portion. It extends so as to intersect perpendicularly to the direction of the force, and the cross section of each part in the longitudinal direction forms a bent 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. And this tensile force is supported by the anchor attachment part in the inner panel of a rear pillar through the said seat belt and the anchor which latches this seat belt. At this time, stress concentration due to the tensile force tends to occur in the rear edge portion of the inner panel behind the anchor mounting portion.

  Here, according to the invention, in the side view of the vehicle body, the bend extending between each front end edge portion of the outer and inner panels and the anchor mounting portion so as to intersect perpendicularly to the direction of the tensile force. Forming part.

  For this reason, the bending portion is plastically deformed by the tensile force at the time of the front collision so that each portion in the longitudinal direction effectively expands in a substantially orthogonal direction of the bending portion, thereby the tensile force. Is dispersed so as to be directed to each part in the longitudinal direction of the bent portion. Therefore, the tensile force is prevented from concentrating on the rear edge portion of the inner panel behind the anchor mounting portion, that is, stress concentration is generated in the rear edge portion of the inner panel. Is prevented.

  As a result, the spot weld that connects the rear end edge portion of the inner panel and the rear end edge portion of the outer panel breaks due to the tensile force at the time of the front collision, and the gap between these rear end edges is The occurrence of peeling is prevented, and the combined state of the two rear end edges is well maintained. For this reason, since the anchor attached to the anchor attaching portion of the inner panel and the seat belt that is hooked on the anchor are held in that position, the seat occupant is restrained on the seat at the time of a front collision. The restraint performance by the seat belt is more reliably maintained better.

  Further, the reliable maintenance of the above-described good restraint performance is not simply by reinforcing the rear edge portion of the inner panel behind the anchor mounting portion with a separate reinforcing material, as described above. This is achieved by forming a bent portion in the reinforcing panel. 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 pillar that constitutes the rear side portion of the vehicle body has an outer panel and an inner panel that extend long in the vertical direction and face each other in the width direction of the vehicle body. The front and rear edge portions of the outer and inner panels are spot-welded to each other at a plurality of points in the vertical direction. A seat belt anchor is attached to the inner panel. A reinforcing panel that reinforces the anchor mounting portion of the anchor to the inner panel is attached to the rear pillar.

  In the side view of the vehicle body, the tensile force applied to the seat belt at the time of a front collision is applied to the inner panel portion or the reinforcing panel portion between the rear edge portions of the outer and inner panels and the anchor mounting portion. A bent portion is formed which extends so as to intersect with the direction perpendicular to each other, and has a cross-sectional shape of each portion in the longitudinal direction.

  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 includes a rear pillar 6 extending in the vertical direction and constituting left and right rear side portions of the vehicle body 2, and left and right side rails 7 extending forward from an upper end portion of the rear pillar 6 and constituting the upper portion of the vehicle body 2. And a roof panel 8 that is installed on the left and right side rails 7 and forms the upper surface of the passenger compartment 3. The rear pillar 6 and the side rail 7 are frame members of the vehicle body 2 and have sufficient strength and rigidity.

  In front of the rear pillar 6 and below the side rail 7, a side door opening 10 that allows communication between the inside and outside of the passenger compartment 3 is formed, 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 6 and the rear edge of the roof panel 8, and a back door 13 is provided to open and close the door opening 12. Yes.

  The rear pillar 6 includes outer and inner panels 16 and 17 that extend long in the vertical direction and face each other in the width direction of the vehicle body 2. The front edge portions 16a and 17a of the outer and inner panels 16 and 17 are overlapped with each other, and are spot-welded S1 and coupled to each other at a plurality of points in the vertical direction. The rear edge portions 16b and 17b are also overlapped with each other, and are spot-welded S2 at a plurality of points in the vertical direction and coupled to each other. Further, the middle portions 16c and 17c in the front-rear direction of the outer and inner panels 16 and 17 are separated from each other, thereby forming an internal space 18 between the outer and inner panels 16 and 17. That is, the rear pillar 6 has a closed cross-sectional structure.

  A shoulder anchor 22 for fastening an end portion of the seat belt 21 is attached to a substantially central portion in the front-rear direction of the middle portion 17 c of the inner panel 17 by a fastener 23. When the vehicle 1 travels, a seated person on the seat in the rear part of the passenger compartment 3 is restrained on the seat by the seat belt 21.

  A reinforcing panel 27 is attached to the rear pillar 6 so as to reinforce the anchor attaching portion 26 of the anchor 22 to the inner panel 17. The reinforcing panel 27 is sandwiched between the outer and inner panels 16 and 17 of the rear pillar 6, and the front end edge portion 27 a of the reinforcing panel 27 is connected to the front end edge portions 16 a and 16 of the outer and inner panels 16 and 17. It is sandwiched between 17a and joined by the spot welding S1.

  The rear end edge portion 27b of the reinforcing panel 27 is sandwiched between the rear end edge portions 16b and 17b of the outer and inner panels 16 and 17, and is joined by the spot welding S2. Further, the substantially central portion of the midway portion 27c in the front-rear direction of the reinforcing panel 27 and the anchor mounting portion 26 are overlapped with each other and fastened together by the fastener 23, whereby the anchor mounting portion 26 is reinforced. Yes.

  The front upper portion 27d of the reinforcing panel 27 extends forward to reinforce the side rail 7. The rear upper portion 27e of the reinforcing panel 27 extends inward in the width direction of the vehicle body 2 to reinforce the rear edge portion of the roof panel 8.

  Another reinforcing panel 30 is provided in a space between the outer panel 16 and the reinforcing panel 27 of the rear pillar 6 and extends long in the vertical direction to reinforce the anchor mounting portion 26 and the reinforcing panel 27. The other reinforcing panel 30 has a hat-shaped cross section in the longitudinal direction. The front and rear edge portions of the upper portion of the other reinforcing panel 30 are coupled to the reinforcing panel 27 by spot welding S3 and S4, and the front and rear edge portions of the lower portion of the other reinforcing panel 30 are connected to the rear pillar 6. It is joined to the inner panel 17 by spot welding S5, S6. In addition, the rear edge portion in the middle portion in the longitudinal direction of the other reinforcing panel 30 is overlapped with the middle portion 27c of the reinforcing panel 27 corresponding to the anchor mounting portion 26, and is fastened together by the fastener 23. Thus, the anchor mounting portion 26 is further reinforced.

  In the side view of the vehicle body 2 (FIG. 2), the outer panel 16 and the reinforcing panel 27 between the outer end of the rear pillar 6, the rear edge portions 16 b and 17 b of the inner panels 16 and 17 and the anchor mounting portion 26. The bent portions 32 extending in the vertical direction are formed in the portions. The bent portion 32 extends so as to intersect perpendicularly with the direction of the tensile force F applied to the seat belt 21 from the seated person at the time of a front collision, and each cross section in the longitudinal direction is bent like a zigzag triangular wave. It is made into a shape.

  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 21. The tensile force F is supported by an anchor mounting portion 26 on the inner panel 17 of the rear pillar 6 via the seat belt 21 and the anchor 22 that holds the seat belt 21. At this time, stress concentration due to the tensile force F tends to occur in the rear end edge portion 17b of the inner panel 17 behind the anchor mounting portion 26.

  Here, according to the above configuration, in the side view of the vehicle body 2, the direction of the tensile force F between the front edge portions 16 a and 17 a of the outer and inner panels 16 and 17 and the anchor mounting portion 26. And a bent portion 32 extending so as to intersect perpendicularly.

  For this reason, the bending portion 32 is plastically deformed by the tensile force F at the time of the front collision so that each portion in the longitudinal direction effectively expands in a substantially orthogonal direction of the bending portion 32. The tensile force F is dispersed so as to be directed to each part in the longitudinal direction of the bent portion 32. Therefore, the tensile force F is prevented from concentrating on the rear end edge portion 17b of the inner panel 17 behind the anchor mounting portion 26, that is, on the rear end edge portion 17b of the inner panel 17. Stress concentration is prevented from occurring.

  As a result, the spot weld S2 that joins the rear end edge portion 17b of the inner panel 17 and the rear end edge portion 16b of the outer panel 16 to each other breaks due to the tensile force F at the time of the front collision, It is prevented that peeling occurs between the end edge portions 16b and 17b, and the combined state of the two rear end edge portions 16b and 17b is maintained well. For this reason, since the anchor 22 attached to the anchor attachment portion 26 of the inner panel 17 and the seat belt 21 hooked to the anchor 22 are held in that position, the anchor 22 is placed on the seat at the time of the front collision. The restraint performance by the seat belt 21 restraining the seated person 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 rear end edge portion 17b of the inner panel 17 behind the anchor mounting portion 26 with a separate reinforcing material. This is achieved by forming the bent portion 32 in the inner panel 17 or the reinforcing panel 27. Therefore, reliable maintenance of the above-described good restraint performance can be achieved with a simple configuration and while suppressing an increase in mass.

  In FIG. 1, as described above, when the rear pillar 6 is plastically deformed so that each part in the longitudinal direction of the bent portion 32 is developed by the tensile force F applied to the seat belt 21 at the time of the front collision, The rear edge portions 17b and 27b of the inner panel 17 and the reinforcing panel 27 rotate around the centroid 34 toward the rear edge 16b of the outer panel 16.

  For this reason, at the time of a front collision, the rear end edge portions 17b and 27b of the inner panel 17 and the reinforcing panel 27 tend to come into pressure contact with the rear end edge portion 16b of the outer panel 16; It is more reliably prevented that both rear end edges 16b and 17b of the panels 16 and 17 are separated from each other. Therefore, the restraining performance by the seat belt 21 is more reliably maintained better.

  Although the above is based on the illustrated example, the bent portion 32 may be formed on only one of the inner panel 17 and the reinforcing panel 27. Further, the cross section of the bent portion 32 may be a bent shape such as an arc wave, or a bent shape in which a U-shape and an inverted U-shape are continuous.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Car body 3 Car compartment 6 Rear pillar 16 Outer panel 16a Front end edge part 16b Rear end edge part 16c Midway part 17 Inner panel 17a Front end edge part 17b Rear end edge part 17c Midway part 18 Internal space 21 Seat belt 22 Anchor 23 Fastener 26 Anchor attachment portion 27 Reinforcement panel 27a Front end edge portion 27b Rear end edge portion 27c Midway portion 30 Other reinforcement panel 32 Bending portion 34 Centroid F F Tensile force R Rotation S Spot welding

Claims (1)

The rear pillar that constitutes the rear side portion of the vehicle body has an outer panel and an inner panel that extend in the vertical direction and face each other in the width direction of the vehicle body, and the front and rear end edges of the outer and inner panels are arranged in the vertical direction. In a vehicle body rear structure of a vehicle in which spot welding is performed at a plurality of points, an anchor for fastening a seat belt is attached to the inner panel, and a reinforcing panel that reinforces an anchor attaching portion of the anchor to the inner panel is attached to the rear pillar.
In the side view of the vehicle body, the tension applied to the seat belt at the time of a front collision is applied to the inner panel portion and / or the reinforcement panel portion between the rear edge portions of the outer and inner panels and the anchor mounting portion. A vehicle body rear structure, characterized in that a vehicle body rear part structure is formed, which extends so as to intersect perpendicularly to the direction of force, and in which each cross section in the longitudinal direction is bent.

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