JP6256517B2 - Vehicle side body structure - Google Patents

Description

  The present invention relates to a connecting part between a hinge pillar and a side sill in a vehicle and a side body structure of the periphery thereof, and belongs to the technical field of a vehicle body structure of a vehicle.

  In general, at the time of a frontal collision of a vehicle, a pair of left and right front side frames provided so as to extend in the front-rear direction of the vehicle body at the front of the vehicle body are crushed to absorb an impact load and pass through the front side frame. The impact load is distributed to each part of the vehicle body, thereby suppressing deformation of the passenger compartment.

  On the other hand, in the vehicle body width direction, when a so-called small overlap collision occurs in which a collision object overlaps a region outside the front side frame in the vehicle, the front wheels arranged in the overlap region are relatively relative to the vehicle body. The impact load may be input to the hinge pillar from the front wheel.

  The impact load input to the hinge pillar in this way passes through the side sill extending from the lower end of the hinge pillar to the vehicle body rear side, the front pillar extending rearward and upward from the upper end of the hinge pillar, the impact bar of the front door, etc. Distributed to the rear side of the vehicle. In this way, the load is distributed from the hinge pillar to the respective parts on the rear side of the vehicle body, so that deformation of the passenger compartment that causes the hinge pillar and the dash panel to retreat is suppressed.

  In general, the hinge pillar includes a pair of inner and outer hinge pillar members joined to each other, for example, by welding a pair of front and rear flanges. Between the inner and outer hinge pillar members, a closed cross-section that is continuous in the vertical direction of the vehicle body is formed, so that load transmission from the lower end side of the hinge pillar toward the upper end side or load transmission from the upper end side to the lower end side is satisfactorily performed. It is.

  Further, the side sill includes a pair of inner and outer side sill members joined to each other by welding a pair of upper and lower flanges, for example. A closed cross-section that is continuous in the longitudinal direction of the vehicle body is formed between the inner and outer side sill members, whereby the load transmission to the rear side of the vehicle body by the side sill as described above is satisfactorily achieved.

  The front end portion of the outer side sill member may be disposed inside the connecting portion between the hinge pillar and the side sill, protruding forward of the vehicle body from the rear edge of the hinge pillar. In this case, the projecting portion of the outer side sill member that protrudes toward the front side of the vehicle body from the rear edge of the hinge pillar may form a closed cross-section of the side sill due to the difficulty of welding work to the upper flange of the outer side sill member. The closed side cross-section of the side sill may be formed only on the rear side of the vehicle body relative to the hinge pillar.

  In a vehicle having this type of side body structure, when such a small overlap collision occurs, the outer side sill member to which an impact load is input from the front side of the vehicle body is formed at the front end portion that does not form a closed section. It is easy to buckle, and there is a problem that load distribution to the rear side of the vehicle body via the side sill cannot be effectively performed.

  For this problem, as disclosed in Patent Document 1, an inner reinforcing member extending in the longitudinal direction of the vehicle body is disposed inside the connecting portion between the lower end portion of the hinge pillar and the front end portion of the side sill. It is conceivable to form a second closed cross-section that is smaller than the closed cross-section of the side sill itself in the longitudinal direction of the vehicle body between the inner reinforcing member and the inner wall portion of the connecting portion.

  As described above, the second closed cross section is formed on the front side of the vehicle body from the rear edge of the hinge pillar, so that the impact load input to the hinge pillar from the front side of the vehicle body is passed through the second closed cross section and the hinge pillar. Can be transmitted to the closed cross-section of the side sill formed on the rear side of the vehicle body.

JP 2013-159290 A

  However, in the vehicle body structure in which the closed cross-section of the side sill is formed on the rear side of the vehicle body relative to the hinge pillar, there is room for further improvement in order to more stably distribute the load to the rear side of the vehicle body.

  Therefore, the present invention effectively suppresses the backward movement of the hinge pillar and the dash panel, and hence the deformation of the passenger compartment, by more stably dispersing the impact load input to the hinge pillar from the front side of the vehicle body to the rear side of the vehicle body. Is an issue.

  In order to solve the above-mentioned problems, the vehicle body structure according to the present invention is configured as follows.

First, the invention according to claim 1 of the present application is
A hinge pillar having a hinge pillar member that forms a closed cross section that is continuous in a vertical direction of the vehicle body at a side portion of the vehicle body;
A side sill having a side sill member that forms a closed cross section that is continuous in the vehicle front-rear direction on the vehicle rear side of the hinge pillar at a side portion of the vehicle body;
From the first closed cross section and the second closed cross section arranged at the connecting portion between the lower end portion of the hinge pillar and the front end portion of the side sill so as to be aligned in the vertical direction of the vehicle body, and from the first closed cross section and the second closed cross section Is also provided with a closed cross-section component that forms a third closed cross-section disposed on the rear side of the vehicle body so as to be continuous in the longitudinal direction of the vehicle body ,
The first closed cross section is formed between a first side surface portion facing the hinge pillar member in the vehicle body width direction and the hinge pillar member,
The second closed cross section is formed between the hinge pillar member and a second side surface portion facing the hinge pillar member in the vehicle body width direction on the vehicle body lower side than the first side surface portion,
The third closed section is formed between a third side surface portion joined to a rear end portion of the first side surface portion and a rear end portion of the second side surface portion, and the hinge pillar member,
The rear end side of the third closed section is connected to the closed section of the side sill.

Further, the term “connected” means that the rear end of the third closed cross section is disposed inside the front end of the closed cross section of the side sill and the peripheral wall constituting the rear end of the third closed cross section . It means that a part and a part of the peripheral wall constituting the front end part of the closed cross section of the side sill are made common.

The invention according to claim 2 of the present application is the invention according to claim 1,
Between the lower end portion of the rear edge portion of the hinge pillar and the front end portion of the upper edge portion of the side sill, a curved corner portion constituting a part of the peripheral edge of the door opening is formed,
The front end portion of the third closed cross section is disposed at a position in the longitudinal direction of the vehicle body that overlaps the curved corner portion.

  Note that “overlap” as used in this specification means that at least a part of one constituent part overlaps at least a part of another constituent part.

The invention according to claim 3 of the present application is the invention according to claim 1 or 2,
A ridge containing the upper edge corner portion of the first side surface portion before Symbol first closed section, said the line formed by the upper surface portion of the side sill in side view of the vehicle body, arranged so as to be continuous with each other in the longitudinal direction of the vehicle body It is characterized by being.

The invention according to claim 4 of the present application is the invention according to claim 3,
The vehicle body vertical dimension of the first closed cross section is increased toward the front side of the vehicle body.

The invention according to claim 5 of the present application is the invention according to claim 3 or claim 4,
The first closed cross section is formed between the hinge pillar member and a first reinforcing member having a hat-shaped cross section that is arranged to extend in the longitudinal direction of the vehicle body and joined to the hinge pillar member. To do.

The invention according to claim 6 of the present application is the invention according to claim 5 ,
A second reinforcing member and a third reinforcing member extending in the longitudinal direction of the vehicle body are joined to the hinge pillar member,
The second reinforcing member has a front Stories second side portion, an upper surface portion extending from the upper end of the second side portion to said hinge pillar member, an end portion opposite to the at the upper face the second side surface portion An upper flange portion that is provided to be joined to the hinge pillar member,
The third reinforcing member includes a third side surface portion, a lower surface portion extending from a lower end of the third side surface portion toward the hinge pillar member, and an end portion of the lower surface portion opposite to the third side surface portion. A lower flange portion provided and joined to the hinge pillar member;
The second closed section includes the hinge pillar member, the second side surface portion and the upper surface portion of the second reinforcing member, and the third side surface portion and the lower surface portion of the third reinforcing member,
The third side surface portion includes a base portion joined to the second side surface portion, and an upper extension portion extending upward from the base portion and joined to the first side surface portion,
The third closed section includes the hinge pillar member and the third side surface portion and the lower surface portion of the third reinforcing member.

The invention according to claim 7 of the present application is the invention according to any one of claims 1 to 6 ,
The hinge pillar member is an inner hinge pillar member that constitutes a vehicle body width direction inner portion of the hinge pillar,
The inner hinge pillar member has a bending promoting portion that is continuously bent in the vertical direction of the vehicle body so as to bend and deform so as to protrude outward in the vehicle width direction due to stress concentration with respect to the impact load input to the hinge pillar from the front side of the vehicle body. Or provided to extend intermittently,
The bending promoting portion is disposed adjacent to the front side of the front end portion of the closed cross-section constituting portion on the vehicle body side.

The invention according to claim 8 of the present application is the invention according to claim 7 ,
The bending promoting portion includes a vertical bead portion formed on the inner hinge pillar member so as to extend in a vehicle body vertical direction.

The invention according to claim 9 of the present application is the invention according to claim 7 or claim 8 ,
The bend promoting part includes one end of a lateral bead part formed on the inner hinge pillar member so as to extend in the longitudinal direction of the vehicle body.

The invention according to claim 10 of the present application is the invention according to any one of claims 7 to 9 ,
The bend promoting portion includes a corner portion that forms a ridge line extending in the vertical direction of the vehicle body at the periphery of the concave portion or convex portion of the inner hinge pillar member.

The invention according to claim 11 of the present application is the invention according to any one of claims 7 to 10 ,
The bending promoting portion includes a boundary portion between a predetermined high-rigidity portion provided in the inner hinge pillar member and a low-rigidity portion including a portion having lower rigidity than the high-rigidity portion in the inner hinge pillar member. And

The invention according to claim 12 of the present application is the invention according to any one of claims 7 to 11 ,
The bending promoting portion is arranged along a front end portion of the closed cross-section constituting portion in a side view of the vehicle body.

  According to the first aspect of the present invention, in the closed cross-section component provided at the connecting portion between the hinge pillar and the side sill, a plurality of closed cross-sections continuous in the longitudinal direction of the vehicle body are arranged in the vertical direction of the vehicle body. Therefore, the impact load input from the front side of the vehicle body to the connection portion between the hinge pillar and the side sill due to a small overlap collision or the like can be distributed to the rear side of the vehicle body via the plurality of closed cross sections.

  In the closed cross-section component, the stress applied to the portion constituting each closed cross-section due to the impact load from the front side of the vehicle body is distributed compared to the case where only one closed cross-section is formed. The proof stress of the closed cross-section component part against the load can be increased. Therefore, by suppressing the deformation of each closed cross section, load transmission to the vehicle body rear side via these closed cross sections can be performed satisfactorily.

  In addition, the rear end side of the plurality of closed cross-sections is focused on one converging closed cross-section that is continuous in the longitudinal direction of the vehicle body, and the rear end side of the converging closed cross-section is connected to the closed cross-section of the side sill. The impact load transmitted to the vehicle body rear side by the closed cross section is smoothly transmitted to the closed cross section of the side sill via the converging closed cross section. Therefore, the load distribution to the vehicle body rear side via the side sill can be effectively performed, and thereby the hinge pillar and the dash panel are prevented from retreating, thereby suppressing the deformation of the passenger compartment.

  According to the second aspect of the present invention, in the vehicle body longitudinal direction position overlapping the curved corner portion of the door opening formed between the lower end portion of the rear edge portion of the hinge pillar and the front end portion of the upper edge portion of the side sill. The multiple closed sections of the closed cross-section component are converged to a single converging closed cross section, so that smooth load transmission from the closed cross-section component to the side sill is achieved while avoiding stress concentration on the curved corner. it can.

  According to the third aspect of the present invention, the ridgeline formed in the closed cross-section component portion by the corner portion of the upper wall portion and the side wall portion in the first closed cross section and the upper surface portion of the side sill in the side view of the vehicle body are formed. Since the lines are arranged so as to be continuous with each other in the longitudinal direction of the vehicle body, smooth load transmission from the ridge line of the closed cross-section constituting part to the upper surface part of the side sill can be realized.

  When the invention according to claim 4 is applied to the invention according to claim 3, an impact load from the front side of the vehicle body is received in a wide range in the vertical direction of the vehicle body at the front end portion of the first closed cross section of the closed cross-section component. be able to. Therefore, the stress applied to the front end portion of the portion constituting the first closed cross section is dispersed with respect to the impact load from the front side of the vehicle body, so that the shape of the first closed cross section can be maintained well, Load transmission to the rear side of the vehicle body via one closed cross section can be effectively realized.

  According to the fifth aspect of the present invention, the first closed cross section of the closed cross section constituting portion can be easily formed between them only by joining the first reinforcing member having a hat-shaped cross section to the hinge pillar member. .

When the invention according to claim 6 is applied to the invention according to claim 5 , the second side surface portion of the second reinforcing member and the third side surface portion of the third reinforcing member which are simply configured are joined to each other. In addition, the second closed cross section of the closed cross section constituting portion can be easily formed between the hinge pillar member and the second and third reinforcing members simply by joining the second and third reinforcing members to the hinge pillar member. . In addition, the third closed section can be easily formed using the third side surface portion simply by joining the upper extension portion provided on the third side surface portion of the third reinforcing member to the first side surface portion. .

According to the invention described in claim 7 , when an impact load is input to the hinge pillar from the front side of the vehicle body, the bending promoting portion provided in the inner hinge pillar member is bent and deformed so as to protrude outward in the vehicle body width direction. Thus, the front end side of the closed cross-section constituting portion arranged adjacent to the rear side of the bending promoting portion is displaced outward in the vehicle width direction. Therefore, when an impact load is input to the hinge pillar from the front side of the oblique vehicle body on the outer side in the vehicle body width direction, the impact load can be easily input to the closed cross-section component, thereby passing through the closed cross-section component. Load transmission to the side sill can be performed effectively.

When the invention according to claim 8 is applied to the invention according to claim 7 , when an impact load is input to the hinge pillar from the front side of the vehicle body, stress concentrates on the vertical bead portion formed on the inner hinge pillar member. Thereby, the above-mentioned bending deformation in the bending promoting part including the vertical bead part can be effectively promoted.

If the invention according to claim 9 is applied to the invention according to claim 7 or claim 8 , when an impact load is input to the hinge pillar from the front side of the vehicle body, the lateral bead portion formed on the inner hinge pillar member By concentrating the stress on the one end portion, the above-described bending deformation in the bending promoting portion including the portion can be effectively promoted.

When the invention according to claim 10 is applied to the invention according to any one of claims 7 to 9 , when an impact load is input to the hinge pillar from the front side of the vehicle body, the concave portion of the inner hinge pillar member or By concentrating the stress on the corner portion that forms a ridge line extending in the vertical direction of the vehicle body at the periphery of the convex portion, the above-described bending deformation in the bending promoting portion including the corner portion can be effectively promoted.

When the invention according to claim 11 is applied to the invention according to any one of claims 7 to 10 , the high rigidity of the inner hinge pillar member when an impact load is input to the hinge pillar from the front side of the vehicle body. By concentrating the stress on the boundary portion between the portion and the low rigidity portion, the above-described bending deformation in the bending promoting portion including the boundary portion can be effectively promoted.

When the invention according to claim 12 is applied to the invention according to any one of claims 7 to 11 , the bending promoting portion is arranged along the front end portion of the closed cross-section constituting portion in a side view of the vehicle body. Therefore, when the bending promoting portion is bent and deformed so as to protrude outward in the vehicle width direction, the entire front end portion of the closed cross-section constituent portion can be uniformly displaced outward in the vehicle width direction. Therefore, it is possible to uniformly input the impact load from the front side of the oblique vehicle body outside in the vehicle body width direction to the entire front end of the closed cross-section component, thereby maintaining the closed cross-section shape of the closed cross-section component well. Thus, it is possible to effectively transmit the load to the side sill via the closed cross-section component.

1 is a perspective view showing a side body structure of a vehicle according to an embodiment of the present invention. It is a perspective view which shows the internal structure of the inner side of a hinge pillar and a side sill. It is a perspective view which shows the inner structure of the outer side of a hinge pillar and a side sill. It is the partially broken perspective view which looked at the hinge pillar and its inside from the diagonal front side inside a vehicle body width direction. It is sectional drawing which looked at the inside of a hinge pillar from the vehicle body front side. It is a side view which shows the internal structure of the inner side of a hinge pillar and a side sill. It is a perspective view showing the 1st inner reinforcement. It is a perspective view showing the 2nd inner reinforcement. It is a perspective view which shows a 3rd inner reinforcement. FIG. 10 is a cross-sectional view taken along lines AA, BB, and CC in FIG. 9 when the first to third inner reinforcements and the periphery thereof are viewed from the front side of the vehicle body. FIG. 10 is a cross-sectional view taken along line DD, line EE, and line FF in FIG. 9 when the first to third inner reinforcements and the periphery thereof are viewed from the front side of the vehicle body. It is the perspective view which looked at the hinge pillar of the left side of a vehicle body, and its peripheral part from the vehicle interior side. It is sectional drawing which looked at the gusset shown in FIG. 12, and its peripheral part from the vehicle body upper side. It is the perspective view which looked at the hinge pillar of the vehicle body right side and its peripheral part from the vehicle interior side. It is the GG sectional view taken on the line of FIG. 1 when the connection part of the lower end part of a hinge pillar and the front-end part of a side sill was seen from the vehicle body upper side. It is the perspective view which looked at the hinge pillar of the vehicle body left side in the state deform | transformed by the input of the impact load from a vehicle body front side, and its peripheral part from the vehicle interior side. It is sectional drawing which looked at an example of the state of the connection part of the lower end part of a hinge pillar and the front-end part of a side sill when an impact load is input into the hinge pillar from the vehicle body front side from the vehicle body upper side. It is the HH sectional view taken on the line of FIG. 17 which looked at the connection part of the same state from the vehicle body front side.

  Hereinafter, details of a side body structure of a vehicle according to the present invention will be described for each embodiment with reference to the accompanying drawings. In the following description, terms indicating directions such as “front”, “rear”, “left”, “right”, “up”, “down”, etc. Each direction of the vehicle body when the traveling direction during forward traveling is set to “front” shall be indicated. Further, in the accompanying drawings, reference numeral “X” is attached to the vehicle body width direction, reference symbol “Y” is attached to the vehicle body longitudinal direction, and reference symbol “Z” is attached to the vehicle body vertical direction.

[overall structure]
FIG. 1 is a perspective view showing a side portion on the left side of a vehicle body 1 of an automobile 1 having a side body structure according to the present embodiment. In FIG. 1, the illustration of the cab side outer 48 (see FIG. 4 and the like) constituting the surface of the vehicle body side portion is omitted.

  As shown in FIG. 1, the automobile 1 includes a side sill 4 that extends in the longitudinal direction Y of the vehicle body and a hinge pillar 20 that extends in the vertical direction Z of the vehicle body. The hinge pillar 20 is connected to the front end of the side sill 4 at its lower end.

  The side sill 4 is provided on each side of the left and right sides of the vehicle body, and the floor panel 2 (see FIG. 13) is installed between the left and right side sills 4. The hinge pillars 20 are also provided on the left and right sides of the vehicle body, respectively, and a dash panel 10 (see FIGS. 12 to 14) extending in the vehicle body width direction X is installed between the left and right hinge pillars 20. Note that a toe board 3 (see FIGS. 13 and 16) straddling the upper surface of the floor panel 2 and the rear surface of the dash panel 10 is disposed between the lower ends of the left and right hinge pillars 20.

  As shown in FIG. 1, the automobile 1 includes a front pillar 30 extending obliquely rearward and upward from the upper end portion of the hinge pillar 20, a roof rail 36 extending from the upper end portion of the front pillar 30 to the vehicle body rear side, and the side sill 4 and the roof rail. 36, a center pillar 38 extending in the vertical direction of the vehicle body is provided.

  On the vehicle body side portion of the automobile 1, a door surrounded by an upper edge portion of the side sill 4, a rear edge portion of the hinge pillar 20, a rear edge portion of the front pillar 30, a lower edge portion of the roof rail 36, and a front edge portion of the center pillar 38. An opening 40 is formed. A curved corner portion 42 is formed at the periphery of the door opening 40 between the lower end portion of the rear edge portion of the hinge pillar 20 and the front end portion of the upper edge portion of the side sill 4.

[Hinge pillar]
As shown in FIG. 3, the hinge pillar 20 includes a hinge-pillar outer 21 having a hat-like cross section that opens to the inside in the vehicle body width direction X, and a hinge-pillar inner lower that has a hat-like cross-section that opens to the outside in the vehicle width direction X as shown in FIG. 22 and a hinge pillar inner upper 23.

  As shown in FIG. 2, the hinge pillar inner lower 22 and the hinge pillar inner upper 23 are arranged so as to be continuous in the vehicle body vertical direction, and the upper end portion of the hinge pillar inner lower 22 and the lower end portion of the hinge pillar inner upper 23. Are joined together.

  The hinge pillar inner lower 22 and the hinge pillar inner upper 23 are respectively side surface portions 22a and 23a constituting the inner surface of the hinge pillar 20 in the vehicle width direction X, and front surface portions 22b and 23b constituting the front surface of the hinge pillar 20 on the vehicle body side. , Rear surface portions 22c and 23c constituting the rear surface of the hinge pillar 20, first flange portions 22d and 23d provided at the outer edges of the front surface portions 22b and 23b in the vehicle width direction X, and the rear surface portion 22c, The second flange portions 22e and 23e provided on the outer edge of the vehicle body width direction X of 23c are provided.

  The hinge pillar inner lower 22 extends in the vertical direction Z of the vehicle body, and in addition to the pillar portion 22A constituting the lower end side portion of the hinge pillar 20, a curved portion 22B extending rearward and downward while being curved from the lower end portion of the pillar portion 22A. And a rear extension 22C extending from the rear end of the curved portion 22B to the rear side of the vehicle body. The curved portion 22 </ b> B constitutes a connection portion between the lower end portion of the hinge pillar 20 and the front end portion of the side sill 4, and the rear extension portion 22 </ b> C constitutes a part of the side sill 4. A rear end portion of the rear extension 22C is joined to a front end portion of a side sill inner 6 described later.

  The pillar portion 22A, the curved portion 22B, and the rear extension portion 22C of the hinge pillar inner lower 22 are integrally connected. The side surface portion 22a, the front surface portion 22b, the rear surface portion 22c, the first flange portion 22d and the second flange portion 22e constituting the hinge pillar inner lower 22 are not only the pillar portion 22A but also the curved portion 22B and the rear extension portion 22C. Each is formed continuously. In the curved portion 22B and the rear extension portion 22C, the front surface portion 22b constitutes a lower surface portion, and the rear surface portion 22c constitutes an upper surface portion.

  As shown in FIG. 3, the hinge pillar outer 21 includes a side surface portion 21 a that forms a surface on the outer side in the vehicle body width direction X of the hinge pillar 20, a front surface portion 21 b that forms a surface on the vehicle body front side of the hinge pillar 20, and the vehicle body rear side of the hinge pillar 20. The rear surface portion 21c constituting the side surface, the first flange portion 21d provided at the inner edge of the front surface portion 21b in the vehicle width direction X, and the rear surface portion 21c provided at the inner edge of the rear surface portion 21c in the vehicle width direction X. A second flange portion 21e is provided.

  As shown in FIG. 4, the hinge pillar outer 21 is disposed so as to face the outer side in the vehicle body width direction X of the hinge pillar inner lower 22 and the hinge pillar inner upper 23, and the hinge pillar outer 21, the hinge pillar inner lower 22, and the hinge The pillar inner upper 23 is joined to each other by joining the first flange portions 21d, 22d, and 23d and joining the second flange portions 21e, 22e, and 23e (see FIG. 15).

  The flange portions 48d and 48e of the cab side outer 48 are further joined to the outer side in the vehicle width direction X of the first flange portions 21d, 22d and 23d and the second flange portions 21e, 22e and 23e (see FIG. 15). ).

  Thus, a closed cross section S1 (see FIG. 15) continuous in the vehicle body vertical direction Z is formed between the hinge pillar outer 21, the hinge pillar inner lower 22 and the hinge pillar inner upper 23. Hereinafter, the closed cross section is referred to as “closed cross section S1 of the hinge pillar 20”.

  As shown in FIGS. 3 to 5, an hinge reinforcement (hereinafter referred to as “hinge rain”) is formed in an internal space of the hinge pillar 20 surrounded by the hinge pillar outer 21, the hinge pillar inner lower 22, and the hinge pillar inner upper 23. 50) is provided. The hinge rain 50 is disposed above the center in the height direction of the hinge pillar 20.

  The hinge rain 50 includes a side surface portion 51 disposed along the side surface portion 21 a of the hinge pillar outer 21, an upper surface portion 52 extending inward in the vehicle body width direction X from the upper edge of the side surface portion 51, and a lower edge of the side surface portion 51. And a lower surface portion 53 extending inward in the vehicle body width direction X, and is formed in a U shape as a whole when viewed from the vehicle body longitudinal direction Y.

  The side part 51 of the hinge rain 50 is joined to the side part 21a of the hinge pillar outer 21 by, for example, a bolt together with the cab side outer 48 and the front door hinge member 120 (see FIG. 5). The upper surface portion 52 and the lower surface portion 53 of the hinge rain 50 are joined to the hinge pillar inner upper 23 by, for example, bolts at the inner edge portions in the vehicle body width direction X. The hinge rain 50 has higher rigidity than the hinge pillar outer 21 and the hinge pillar inner upper 23.

  As shown in FIGS. 3 and 4, a first outer reinforcing panel 26 and a second outer reinforcing panel 28 extending in the length direction of the hinge pillar 20 are provided in the inner space of the hinge pillar 20 below the hinge rain 50 in the vehicle body. It is arranged. The first and second outer reinforcing panels 26 and 28 are joined to the hinge pillar outer 21. The first and second outer reinforcing panels 26 and 28 have higher rigidity than the hinge pillar outer 21.

  The first outer reinforcing panel 26 is provided along the side reinforcing portion 26 a disposed along the inner surface of the side surface portion 21 a of the hinge pillar outer 21 and the inner surface (rear surface) of the front surface portion 21 b of the hinge pillar outer 21. And a front reinforcing portion 26b disposed. The front reinforcing part 26b extends from the front edge of the side reinforcing part 26a to the inside in the vehicle body width direction X. Thereby, the 1st outer side reinforcement panel 26 is formed in the cross-section L shape seeing from the length direction.

  The side reinforcing part 26a of the first outer reinforcing panel 26 is joined to the side part 21a of the hinge pillar outer 21 by spot welding, for example. The lower end portion of the side reinforcing portion 26a is joined to a side sill outer 5 described later, and the upper end portion of the side reinforcing portion 26a is an engaging portion (not shown) engaged with the side portion 51 of the hinge rain 50 from the front side of the vehicle body. Z). The front reinforcing part 26b of the first outer reinforcing panel 26 is joined to the front part 21b of the hinge pillar outer 21 by spot welding, for example.

  The second outer reinforcing panel 28 is disposed on the rear side of the vehicle body relative to the first outer reinforcing panel 26 as a whole. The second outer reinforcing panel 28 has an L-shaped cross section and is joined to the side surface portion 21 a and the rear surface portion 21 c of the hinge pillar outer 21. The second outer reinforcing panel 28 is shorter than the first outer reinforcing panel 26, and the upper end of the second outer reinforcing panel 28 is disposed at the same height as the upper end of the hinge pillar inner lower 22. Yes.

  As shown in FIG. 1, the lower end portion of the second outer reinforcing panel 28 protrudes from the lower end of the hinge pillar outer 21 to the vehicle body lower side, and is joined to a side sill outer 5 described later.

  As shown in FIG. 4, a reinforcing member 29 straddling the hinge pillar inner lower 22, the hinge pillar inner upper 23, and the hinge pillar outer 21 is disposed in the internal space of the hinge pillar 20. The reinforcing member 29 is formed in a crank shape when viewed from the front-rear direction Y of the vehicle body. The reinforcing member 29 is joined to the lower end portion of the hinge pillar inner upper 23 at the inner edge portion of the vehicle body width direction X, and the outer edge of the vehicle body width direction X. This part is joined to the hinge pillar outer 21 via the first and second outer reinforcing panels 26 and 28. In FIG. 3, illustration of the reinforcing member 29 is omitted.

[Side sill]
The side sill 4 includes a cross-section hat-shaped side sill outer 5 that opens to the inside in the vehicle body width direction X as shown in FIG. 3, and a cross-section hat-shaped side sill inner 6 that opens to the outside in the vehicle body width direction X as shown in FIG. ing.

  As shown in FIGS. 2 and 4, the side sill inner 6 includes a side sill 4 that forms a surface of the side sill 4 on the inner side in the vehicle body width direction X, and extends from the upper edge of the side surface portion 6 a to the outer side in the vehicle body width direction X. The upper surface portion 6b constituting the upper surface of the vehicle body, the lower surface portion 6c constituting the lower surface of the side sill 4 extending from the lower edge of the side surface portion 6a and forming the lower surface of the side sill 4, and the upper edge portion of the upper surface portion 6b from the outer edge in the vehicle width direction X An upper flange portion 6d that extends to the side, and a lower flange portion 6e that extends from the edge of the lower surface portion 6c outside the vehicle width direction X to the vehicle body lower side are provided.

  As shown in FIG. 3, the side sill outer 5 includes a side surface portion 5a constituting a surface of the side sill 4 on the outer side in the vehicle body width direction X, and extends from the upper edge of the side surface portion 5a to the inner side in the vehicle body width direction X. The upper surface 5b and the lower surface of the side sill 4 extending inward in the vehicle width direction X from the lower edge of the side surface 5a and extending from the edge of the upper surface 5b in the vehicle width direction X to the upper side of the vehicle. The upper flange portion 5d and the lower flange portion 5e extending from the inner edge of the lower surface portion 5c to the vehicle body width direction X are provided.

  The side sill outer 5 is disposed to face the outside of the side sill inner 6 in the vehicle width direction X. The side sill outer 5 and the side sill inner 6 are joined to each other by, for example, spot welding, the upper flange portions 5d and 6d and the lower flange portion 5e. , 6e are joined together.

  Thus, a closed cross section S2 (see FIG. 11A) that is continuous in the vehicle body longitudinal direction Y is formed between the side sill outer 5 and the side sill inner 6. Hereinafter, the closed section is referred to as “closed section S2 of the side sill 4”.

  In addition, although illustration is omitted, a plurality of reinforcing members straddling the side sill outer 5 and the side sill inner 6 are arranged in the vehicle longitudinal direction Y in the internal space of the side sill 4 surrounded by the side sill outer 5 and the side sill inner 6. Are arranged at intervals.

  The side sill outer 5 is disposed so as to protrude forward of the vehicle body from the side sill inner 6. The front end portion of the side sill outer 5 is located on the front side of the vehicle body relative to the rear edge portion of the hinge pillar 20, more specifically, between the front surface portion 21b and the rear surface portion 21c of the hinge pillar outer 21 in the vehicle body longitudinal direction Y. Yes. That is, the front end portion of the side sill outer 5 is disposed at the connection portion between the hinge pillar 20 and the side sill 4.

  At the front end portion of the side sill outer 5, the front ends of the upper surface portion 5b and the upper flange portion 5d are disposed on the front side of the vehicle body relative to the front ends of the lower surface portion 5c and the lower flange portion 5e. The front end portion of the upper surface portion 5b of the side sill outer 5 and the front end portion of the lower surface portion 5c are connected to each other via a reinforcing member 9 extending in the vehicle body vertical direction.

  As shown in FIG. 4, the front end portion of the side sill outer 5 is located inside the side surface portion 21 a of the hinge pillar outer 21 and outside the side surface portion 22 a of the hinge pillar inner lower 22 in the vehicle body width direction X. That is, the front end portion of the side sill outer 5 is disposed below the internal space of the hinge pillar 20. The side surface portion 21 a of the hinge pillar outer 21 is joined to the outside of the front end portion of the side surface portion 5 a of the side sill outer 5.

  As shown in FIG. 4 and FIG. 10C, the lower flange portion 5e of the side sill outer 5 is connected to the first flange portion 22d of the hinge pillar inner lower 22 on the vehicle front side of the rear edge portion of the hinge pillar 20, for example. Although joined by spot welding, the upper flange portion 5d of the side sill outer 5 is not joined to any member. That is, the side sill outer 5 does not form a closed section on the front side of the vehicle body with respect to the rear edge portion of the hinge pillar 20, and the closed section S2 of the side sill 4 is formed only on the rear side of the vehicle body with respect to the hinge pillar 20. .

  As shown in FIG. 3, a side sill outer reinforcing member 8 extending in the vehicle body front-rear direction Y is joined to the inner surface of the side sill outer 5. The side sill outer reinforcing member 8 is bonded to the side surface reinforcing portion 8 a bonded to the side surface portion 5 a of the side sill outer 5, the upper surface reinforcing portion 8 b bonded to the upper surface portion 5 b of the side sill outer 5, and the lower surface portion 5 c of the side sill outer 5. The lower surface reinforcing portion 8c is formed, and is formed in a U-shaped cross section when viewed from the vehicle body longitudinal direction Y as a whole.

  The front ends of the side reinforcing portion 8a and the lower surface reinforcing portion 8c of the side sill outer reinforcing member 8 are disposed rearwardly of the front end of the side sill outer 5 and substantially the same position as the rear surface portion 21c of the hinge pillar outer 21 in the vehicle body longitudinal direction Y. Has been.

  The front end of the upper surface reinforcing portion 8b of the side sill outer reinforcing member 8 is disposed in front of the front ends of the side surface reinforcing portion 8a and the lower surface reinforcing portion 8c in the vehicle body longitudinal direction Y and rearward of the front end of the side sill outer 5. Yes.

  A flange 8d that extends upward from the inner edge of the vehicle body width direction X is provided at the front end side portion of the upper surface reinforcing portion 8b of the side sill outer reinforcing member 8. The flange portion 8 d is joined to the upper flange portion 5 d of the side sill outer 5.

  The flange portion 8d of the side sill outer reinforcing member 8 is provided so as to extend in the vehicle body longitudinal direction Y. The front end of the flange portion 8d is disposed behind the front end of the upper flange portion 5d of the side sill outer 5 in the vehicle body longitudinal direction Y and further forward than the rear surface portion 21c of the hinge pillar outer 21. The rear end of the flange portion 8d is disposed rearwardly of the front end of the second flange portion 21e of the hinge pillar outer 21 and forward of the rear end of the second flange portion 21e in the vehicle body longitudinal direction Y. .

  As shown in FIG. 4, the lower end portion of the side surface portion 21 a of the hinge pillar outer 21 is joined to the outer surface of the side surface portion 5 a of the side sill outer 5. Further, lower end portions of the first outer reinforcing panel 26 and the second outer reinforcing panel 28 are interposed between the side surface portion 5 a of the side sill outer 5 and the side surface portion 21 a of the hinge pillar outer 21.

  As shown in FIG. 1, a reinforcing member 7 extending in the longitudinal direction Y of the vehicle body is disposed in the vicinity of the curved corner portion 42 of the door opening 40 on the outer side of the vehicle body side portion. The front end side portion of the reinforcing member 7 is curved so as to extend forward and upward along the curved corner portion 42. The reinforcing member 7 is joined across the hinge pillar outer 21 and the side sill outer 5.

[Connection between hinge pillar and side sill]
As shown in the side view of FIG. 6, a first inner reinforcement (hereinafter referred to as “first inner rain”) extending in the vehicle body front-rear direction Y is formed at a connection portion between the lower end portion of the hinge pillar 20 and the front end portion of the side sill 4. ) 60, a second inner reinforcement (hereinafter referred to as “second inner rain”) 70, and a third inner reinforcement (hereinafter referred to as “third inner rain”) 80.

  The first, second, and third inner rains 60, 70, 80 are joined to the hinge pillar inner lower 22 and the side sill inner 6, and have a closed cross-sectional configuration constituted by these members 6, 22, 60, 70, 80. In the portion, closed cross sections S3, S4, and S5 (see FIGS. 10 and 11), which will be described later, are formed.

  The first, second, and third inner rains 60, 70, and 80 have higher rigidity than the hinge pillar inner lower 22 and the side sill inner 6. The first inner rain 60 has higher rigidity than the second inner rain 70 and the third inner rain 80.

  The configuration relating to the first, second, and third inner rains 60, 70, and 80 will be specifically described with reference to FIGS.

  7 is a perspective view showing the first inner rain 60, FIG. 8 is a perspective view showing the second inner rain 70, and FIG. 9 is a perspective view showing the third inner rain 80. 10A is a cross-sectional view taken along line AA in FIG. 6, FIG. 10B is a cross-sectional view taken along line BB in FIG. 6, and FIG. 10C is a cross-sectional view taken along line CC in FIG. 11A is a cross-sectional view taken along the line DD of FIG. 6, FIG. 11B is a cross-sectional view taken along the line EE of FIG. 6, and FIG. 11C is a cross-sectional view taken along the line FF of FIG.

  As shown in FIGS. 6, 7, and 10 (a), the first inner rain 60 has a hat shape in cross section that is joined to the inner surface (the outer surface in the vehicle body width direction X) of the side surface portion 22 a of the hinge pillar inner lower 22. It is a member.

  As shown in FIGS. 6 and 7, the first inner rain 60 is formed from a first side surface portion 61 facing the outer side in the vehicle body width direction X of the side surface portion 22 a of the hinge pillar inner lower 22 and an upper edge of the first side surface portion 61. An upper surface portion 62 extending inward in the vehicle body width direction X, a lower surface portion 63 extending inward in the vehicle body width direction X from the lower edge of the first side surface portion 61, and an upper side extending upward from an edge portion in the vehicle body width direction X of the upper surface portion 62. The flange part 64 and the lower flange part 65 extended downward from the edge part inside the vehicle body width direction X of the lower surface part 63 are provided.

  As shown in FIG. 6, the first side surface portion 61 is formed in a trumpet shape as viewed from the side of the vehicle body so that the vertical dimension Z of the vehicle body increases toward the front side of the vehicle body. The first side surface portion 61 is disposed so as to be inclined such that the lower end portion of the front end thereof is located on the vehicle body upper side than the upper end portion of the rear end.

  The front edge of the first side surface portion 61 is formed in a straight line inclined such that the upper end is located on the rear side of the vehicle body from the lower end, and the rear edge of the first side surface portion 61 is also higher than the lower end. It is formed in a straight line inclined so as to be located on the rear side of the vehicle body. The inclination of the rear edge of the first side surface portion 61 with respect to the vehicle body vertical direction Z is larger than the inclination of the front edge of the first side surface portion 61.

  The front end portion of the first side surface portion 61 is located above the upper surface portion 6b of the side sill inner 6 in the vehicle body vertical direction Z. In the present embodiment, the entire front end portion of the first side surface portion 61 is positioned above the vehicle body with respect to the upper surface portion 6 b of the side sill inner 6. However, the front end portion of the first side surface portion 61 may be disposed such that a part of the upper end side thereof is located on the vehicle body upper side than the upper surface portion 6b of the side sill inner 6.

  The upper flange portion 64 is provided from the front end of the upper surface portion 62 to the center portion, and is joined to the side surface portion 22 a of the hinge pillar inner lower 22. The upper flange portion 64 is disposed in front of the rear surface portion 22c of the pillar portion 22A of the hinge pillar inner lower 22 in the vehicle body longitudinal direction Y, and is rearward of the upper surface portion 22c of the hinge pillar inner lower 22 in the vehicle body vertical direction Z. The upper portion 22c is disposed above the portion constituting the extension portion 22C and at a height position overlapping the portion constituting the curved portion 22B on the upper surface portion 22c.

  The lower flange portion 65 is joined to the side surface portion 22 a of the hinge pillar inner lower 22 via a flange portion 73 described later of the second inner rain 70. The rear end portion of the lower flange portion 65 is disposed at a position overlapping with a portion constituting the curved portion 22B in the upper surface portion 22c of the hinge pillar inner lower 22 in the vehicle body longitudinal direction Y. Further, the lower flange portion 65 is arranged at a position overlapping with a portion constituting the curved portion 22B in the upper surface portion 22c of the hinge pillar inner lower 22 in the vehicle body vertical direction Z.

  As shown in FIGS. 6 and 8, the second inner rain 70 is formed from the second side surface portion 71 facing the outer side in the vehicle body width direction X of the side surface portion 22 a of the hinge pillar inner lower 22 and the upper edge of the second side surface portion 71. An upper surface portion 72 extending inward in the vehicle body width direction X and a flange portion 73 extending upward from an edge portion of the upper surface portion 72 on the inner side in the vehicle width direction X are provided.

  The second side surface portion 71 is disposed so as to extend in the vehicle body longitudinal direction Y as a whole, and the portion from the center portion to the front end of the second side surface portion 71 is inclined slightly upward toward the vehicle body front side. The vehicle body vertical direction Z dimension decreases as it goes toward the vehicle body front side. The 2nd side part 71 is arrange | positioned on the substantially the same surface as the 1st side part 61 (refer FIG. 10).

  The rear end of the upper surface portion 72 of the second inner rain 70 is arranged in the vehicle body longitudinal direction Y on the vehicle body rear side with respect to the portion constituting the curved portion 22B on the upper surface portion 22c of the hinge pillar inner lower 22. The flange portion 73 of the second inner rain 70 is provided from the front end to the center portion of the upper surface portion 72, and is joined to the side surface portion 22 a of the hinge pillar inner lower 22 together with the lower flange portion 65 of the first inner rain 60. .

  As shown in FIGS. 6 and 9, the third inner rain 80 is formed from the third side surface portion 81 facing the outer side in the vehicle body width direction X of the side surface portion 22 a of the hinge pillar inner lower 22 and the lower edge of the third side surface portion 81. A lower surface portion 82 that extends inward in the vehicle body width direction X, a lower flange portion 83 that extends downward from an inner edge of the lower surface portion 82 in the vehicle width direction X, and an upper edge of the third side surface portion 81 outward from the vehicle width direction X. And an upper flange portion 84 that extends.

  The third side surface portion 81 has a base portion 81a that extends in the vehicle body longitudinal direction Y along the second side surface portion 71, and an upper extension portion 81b that extends upward from the rear side portion of the vehicle body relative to the front end of the base portion 81a. The base portion 81a is bonded to, for example, the outer surface of the second side surface portion 71, and the upper extension portion 81b is bonded to, for example, the outer surface of the first side surface portion 61.

  The base portion 81 a is disposed so as to protrude rearward from the rear end of the second side surface portion 71, and the rear end of the base portion 81 a is disposed rearward of the vehicle body from the front end of the side sill inner 6. The upper extension portion 81b is joined to the vehicle body rear side portion of the first side surface portion 61 from the center in the vehicle body longitudinal direction Y.

  The lower surface portion 82 of the third inner rain 80 is disposed opposite to the vehicle body lower side of the upper surface portion 72 of the second inner rain 70. The lower surface portion 82 is opposed to the vehicle body lower side of the upper surface portion 22c of the rear extension portion 22C of the hinge pillar inner lower 22 and the upper surface portion 6b of the side sill inner 6 on the vehicle rear side of the rear end of the second inner rain 70. Has been placed.

  The lower flange portion 83 of the third inner rain 80 is joined to the side surface portion 22a of the hinge pillar inner lower 22 at the front end side portion, and is joined to the side surface portion 6a of the side sill inner 6 at the rear end side portion.

  The upper flange portion 84 of the third inner rain 80 is disposed along the inner surface (surface on the vehicle body lower side) of the upper surface portion 22c of the rear extension 22C of the hinge pillar inner lower 22 and the upper surface portion 6b of the side sill inner 6. , Bonded to these surfaces.

  As shown in FIGS. 10 (a) and 10 (b), in the closed cross-section configuration part configured as described above, the first closed cross-section S3 and the second closed cross-section S4 are continuous in the vehicle body longitudinal direction Y. The impact load input to the hinge pillar 20 from the front side of the vehicle body can be transmitted to the rear side of the vehicle body through the first closed cross section S3 and the second closed cross section S4. The first closed section S3 and the second closed section S4 are formed so as to be aligned in the vehicle body vertical direction Z.

  The first closed section S3 is formed between the hinge pillar inner lower 22 and the first inner rain 60. The first closed cross section S3 can be easily formed by simply joining the first inner rain 60 having a hat-shaped cross section to the hinge pillar inner lower 22.

  The first closed cross-section S3 is a first connecting the pair of side wall portions including the side surface portion 22a of the hinge pillar inner lower 22 and the first side surface portion 61 of the first inner rain 60, and the upper ends of the pair of side wall portions. It has an upper wall part which consists of the upper surface part 62 of the inner rain 60, and a lower wall part which consists of the lower surface part 63 of the 1st inner rain 60 which connects between the lower ends of a pair of said side wall part (refer FIG.6 and FIG.7).

  The vehicle body up-down direction Z dimension of the first closed cross section S3 increases toward the vehicle body front side. The vehicle body width direction X dimension of the first closed cross section S3 is substantially constant, and the cross sectional area of the first closed cross section S3 increases toward the front side of the vehicle body.

  At the front end portion of the first closed cross section S3 in which the vehicle body vertical direction Z dimension is maximized, an impact load from the front side of the vehicle body can be received in a wide range in the vehicle vertical direction. Therefore, the stress applied to the front end portion of the first inner rain 60 is dispersed with respect to the impact load from the front side of the vehicle body, whereby the shape of the first closed cross section S3 can be maintained well, and the first closed cross section can be maintained. Load transmission to the rear side of the vehicle body via S3 can be effectively realized.

  A corner portion C1 of the first closed cross section S3 formed between the side surface portion 61 and the upper surface portion 62 of the first inner rain 60 extends substantially linearly obliquely downward toward the rear side of the vehicle body as shown in FIG. A ridge line L1 is formed.

  As shown in FIG. 6, the ridgeline L1 and the straight line L2 formed by the upper surface portion 22c of the rear extension 22C of the hinge pillar inner lower 22 and the upper surface portion 6b of the side sill inner 6 in a side view of the vehicle body. Further, they are arranged so as to be continuous with each other in the vehicle body front-rear direction Y via a curved line L3 formed by a portion constituting the curved portion 22B in the upper surface portion 22c of the hinge pillar inner lower 22.

  As shown in FIG. 10A and FIG. 10B, the second closed section S4 is arranged with a space on the vehicle body lower side of the first closed section S3. The second closed cross section S <b> 4 is formed between the hinge pillar inner lower 22 and the second inner rain 70 and the third inner rain 80. The second closed cross-section S4 joins the second and third side surfaces 71 and 81 of the second and third inner rains 70 and 80 which are simply configured to each other and hinges the second and third inner rains 70 and 80 to each other. It can be easily formed simply by joining to the pillar inner lower 22.

  The second closed cross-section S4 has a pair of side wall portions composed of the side surface portion 22a of the hinge pillar inner lower 22, the second side surface portion 71 of the second inner rain 70, and the third side surface portion 81 of the third inner rain 80, An upper wall portion comprising the upper surface portion 72 of the second inner rain 70 connecting between the upper ends of the pair of side wall portions, and a lower wall portion comprising the lower surface portion 82 of the third inner rain 80 connecting between the lower ends of the pair of side wall portions. (See FIGS. 6, 8 and 9)

  The vehicle body vertical direction Z dimension, the vehicle body width direction X dimension, and the cross-sectional area of the second closed cross section S4 are substantially constant over the entire length in the vehicle body longitudinal direction Y. Therefore, the total vehicle body vertical Z dimension and the total cross-sectional area of the first closed cross section S3 and the second closed cross section S4 and the total cross sectional area increase toward the front side of the vehicle body.

  As shown in FIG. 10 (c), the third side surface portion 81 of the third inner rain 80 is joined to the first side surface portion 61 of the first inner rain 60 outside the first closed cross section S3 and has the second closed cross section S4. It is joined to the second side surface 71 of the second inner rain 70 on the outside. Therefore, one converging closed cross section S5 is formed between the hinge pillar inner lower 22 and the third inner rain 80 on the rear side of the vehicle body from the rear ends of the first closed cross section S3 and the second closed cross section S4. In this way, the first closed cross section S3 and the second closed cross section S4 are converged to one converging closed cross section S5 on the rear end side thereof.

  The converging closed cross section S5 includes a third side surface portion 81 joined to the outside of the first side surface portion 61 constituting the first closed cross section S3 and the outside of the second side surface portion 71 constituting the second closed cross section S4. Since it is formed by utilizing, the rear end side of the first closed section S3 and the second closed section S4 can be easily focused on the focused closed section S5.

  Further, at each joint portion between the first side surface portion 61 and the second side surface portion 71 and the third side surface portion 81, the impact load from the front side of the vehicle body acts in the shear direction, so that the joint strength of each joint portion is increased. Accordingly, it is possible to realize a good load transmission from the first closed cross section S3 and the second closed cross section S4 to the converging closed cross section S5.

  As shown in FIGS. 11A to 11C, the converging closed section S5 is formed so as to be continuous in the longitudinal direction Y of the vehicle body. The front end portion of the converging closed section S5 is arranged in a position overlapping with a portion constituting the curved portion 22B of the upper surface portion 22c of the hinge pillar inner lower 22 in the vehicle body longitudinal direction Y (CC line in FIG. 6). reference). The rear end portion of the converging closed cross section S5 is disposed on the vehicle body rear side with respect to the front end portion of the side sill inner 6 (see line FF in FIG. 6).

  As shown in FIGS. 6 and 11A to 11C, the converging closed cross section S5 has a side surface 22a of the hinge pillar inner lower 22 or a side surface 6a of the side sill inner 6 and a third inner rain facing the side surface 22a. A portion connecting the pair of side wall portions composed of the third side surface portions 80 of the 80 and the upper ends of the pair of side wall portions, that is, a curved portion 22B or a rear extension portion 22C in the upper surface portion 22c of the hinge pillar inner lower 22 is configured. Or the upper surface portion 6b of the side sill inner 6 and the lower surface portion 82 of the third inner rain 80 connecting the lower ends of the pair of side wall portions.

  As described above, the converging closed cross-section constituting part forming the converging closed cross-section S5 includes the third side surface portion 81 and the lower surface portion 82 of the third inner rain 80, the side surface portion 22a and the upper surface portion 22c of the hinge pillar inner lower 22 and the side sill. The inner surface 6 is constituted by a side surface portion 6a and an upper surface portion 6b.

  The side surface portion 22a and the upper surface portion 22c of the hinge pillar inner lower 22 and the side surface portion 6a and the upper surface portion 6b of the side sill inner 6 constitute not only the focusing closed cross section S5 but also the closed cross section S2 of the side sill 4. Thus, the rear end side portion of the converging closed cross section S5 is configured using the same member as the closed cross section S2 of the side sill 4, so that the rear end side of the converging closed cross section S5 becomes the closed cross section S2 of the side sill 4. It is connected.

[Connection between hinge pillar and dash panel]
As shown in FIGS. 12 and 13, the hinge pillar 20 and the dash panel 10 are connected via the gusset member 12.

  The gusset member 12 includes, for example, a first joint surface portion 13 joined to the dash panel 10 by a pair of bolts, a second joint surface portion 14 joined to the side surface portion 22a of the hinge pillar inner lower 22 by, for example, a pair of bolts, A connecting surface portion 15 that communicates between the first bonding surface portion 13 and the second bonding surface portion 14 is provided. The gusset member 12 has higher rigidity than the dash panel 10 and the hinge pillar inner lower 22.

  As shown in FIG. 13, the first joint surface portion 13 is disposed so as to extend in the vehicle body width direction X along the dash panel 10 in the plan view of the vehicle body, and the second joint surface portion 14 is a side surface portion 22 a of the hinge pillar inner lower 22. Is arranged so as to extend in the vehicle body longitudinal direction Y. The connecting surface portion 15 is disposed so as to extend from the edge of the first joint surface portion 13 on the outer side in the vehicle body width direction X toward the rear side of the vehicle body in the vehicle body width direction X, and the rear end of the connecting surface portion 15 is the second end. It continues to the front end of the joint surface portion 14.

  With the gusset member 12 configured in this manner, the rear surface of the dash panel 10 and the inner surface of the side surface 22a of the hinge pillar inner lower 22 in the vehicle width direction X are connected in a bracing manner.

  The gusset member 12 shown in FIGS. 12 and 13 connects the hinge pillar 20 on the left side of the vehicle body and the dash panel 10, but as shown in FIG. 14, the hinge pillar 20 on the right side of the vehicle body also has the same gusset member 12. It is connected to the dash panel 10 via.

  As shown in FIGS. 12 and 14, in the side surface portion 22 a of each hinge pillar inner lower 22 of the left and right hinge pillars 20, the position adjacent to the vehicle body rear side of the second joint surface portion 14 of the gusset member 12 is in the vehicle body vertical direction. Bending promotion portions 90 and 91 extending intermittently to Z are formed.

  As shown in FIGS. 6 and 12, the side surface portion 22a of the hinge pillar inner lower 22 on the left side of the vehicle body has a bulging portion 22f bulging outward in the vehicle body width direction X, a lateral bead portion 22g extending in the vehicle body longitudinal direction Y, A first vertical bead portion 22h and a second vertical bead portion 22i extending in the vehicle body vertical direction Z are formed.

  The bulging portion 22f is disposed on the vehicle body upper side than the upper surface portion 6b (see FIG. 6) of the side sill inner 6. The rear end portion of the bulging portion 22f is disposed so as to overlap the first side surface portion 61 (see FIG. 6) of the first inner rain 60 in a side view of the vehicle body. The front end portion of the bulging portion 22f is disposed so as to overlap the second joint surface portion 14 (see FIG. 12) of the gusset member 12.

  The lateral bead portion 22g is formed to bulge outward from the side surface portion 22a in the vehicle body width direction X. The lateral bead portion 22g is disposed on the vehicle body upper side than the bulging portion 22f and the second joint surface portion 14 of the gusset member 12 (see FIG. 12). The rear end of the lateral bead portion 22g is disposed on the vehicle body upper side than the first side surface portion 61 (see FIG. 6) of the first inner rain 60, and is the front end of the upper flange portion 64 (see FIG. 6) of the first inner rain 60. It is arranged adjacent to the front upper side.

  The first vertical bead portion 22h is formed to bulge outward from the side surface portion 22a in the vehicle body width direction X. The first vertical bead portion 22h is disposed at a distance from the vehicle body lower side of the rear end of the horizontal bead portion 22g. The first vertical bead portion 22h is disposed slightly shifted from the rear end of the horizontal bead portion 22g toward the front side of the vehicle body. The first vertical bead portion 22h is formed at the upper edge of the bulging portion 22f. The first vertical bead portion 22h is disposed adjacent to the vehicle body front side of the upper end portion of the front end of the first side surface portion 61 (see FIG. 6) of the first inner rain 60. The first vertical bead portion 22h is disposed adjacent to the vehicle body rear side of the second joint surface portion 14 (see FIG. 12) of the gusset member 12.

  The second vertical bead portion 22i is formed to bulge outward from the side surface portion 22a in the vehicle body width direction X. The 2nd vertical bead part 22i is arranged at intervals in the lower body side of the lower end of the 1st vertical bead part 22h. The second vertical bead portion 22i is arranged slightly shifted from the first vertical bead portion 22h toward the front side of the vehicle body. The second vertical bead portion 22i is formed at the lower edge portion of the bulging portion 22f. The second vertical bead portion 22i is disposed adjacent to the vehicle body front side of the lower end portion at the front end of the first side surface portion 61 (see FIG. 6) of the first inner rain 60. The second vertical bead portion 22 i is disposed adjacent to the vehicle body lower side of the second joint surface portion 14 (see FIG. 12) of the gusset member 12.

  In the side surface portion 22a of the hinge pillar inner lower 22, the horizontal bead portion 22g, the first vertical bead portion 22h, and the second vertical bead portion 22i are portions having higher rigidity than the surroundings. That is, each peripheral edge of the horizontal bead portion 22g, the first vertical bead portion 22h, and the second vertical bead portion 22i is a boundary between each bead portion 22g, 22h, 22i that is a high-rigidity portion and a peripheral portion that is a low-rigidity portion. The boundary portion is a stress concentration portion where stress against an impact load input to the hinge pillar inner lower 22 is easily concentrated.

  And the bending promotion part 90 in the hinge pillar inner lower 22 on the left side of the vehicle body connects the rear end of the horizontal bead part 22g, the upper and lower ends of the first vertical bead part 22h, and the upper and lower ends of the second vertical bead part 22i. However, it is formed so as to extend intermittently in the vehicle body vertical direction Z.

  As shown in FIG. 14, on the side surface portion 22a of the hinge pillar inner lower 22 on the right side of the vehicle body, a first bulging portion 22j bulging outward in the vehicle body width direction X and further from the first bulging portion 22j to the vehicle body width direction X A second bulging portion 22k bulging outward, a horizontal bead portion 22l extending in the vehicle body longitudinal direction Y, and a vertical bead portion 22m extending in the vehicle body vertical direction Z are formed.

  The front end portion of the first bulging portion 22j is disposed so as to overlap with the second joint surface portion 14 (see FIG. 12) of the gusset member 12 in a side view of the vehicle body. The second bulge portion 22k is arranged continuously to the vehicle body lower side of the first bulge portion 22j. A corner 22n that forms a ridge line extending in the vehicle body vertical direction Z is provided at the front edge of the second bulge 22k.

  The lateral bead portion 22l is formed to bulge outward from the side surface portion 22a in the vehicle body width direction X. The lateral bead portion 22l is disposed on the vehicle body upper side than the first bulging portion 22j and the second joint surface portion 14 of the gusset member 12.

  The vertical bead portion 22m is formed to bulge outward from the side surface portion 22a in the vehicle body width direction X. The vertical bead portion 22m is disposed with a space on the vehicle body lower side of the rear end of the horizontal bead portion 22l. The vertical bead portion 22m is arranged slightly shifted from the rear end of the horizontal bead portion 22l toward the vehicle body front side. The vertical bead portion 22m is formed on the upper edge portion of the first bulge portion 22j. The vertical bead portion 22 m is disposed adjacent to the rear side of the vehicle body of the second joint surface portion 14 of the gusset member 12. The vertical bead portion 22m is disposed between the rear end of the horizontal bead portion 22g and the corner portion 22n at the front edge of the second bulge portion 22k.

  In the side surface portion 22a of the hinge pillar inner lower 22 on the right side of the vehicle body, the side bead portion 22l, the vertical bead portion 22m, and the corner portion 22n of the second bulge portion 22k are portions having higher rigidity than the surroundings.

  The bending promoting portion 91 in the hinge pillar inner lower 22 on the right side of the vehicle body connects the rear end of the horizontal bead portion 22l, the upper and lower ends of the vertical bead portion 22m, and the corner portion 22n of the second bulge portion 22k. It is formed so as to extend intermittently in the vertical direction Z.

  As described above, stress is easily concentrated on the bending promoting portions 90 and 91 formed in the left and right hinge pillar inner lowers 22 when an impact load is input to the hinge pillar inner lowers 22 from the front side of the vehicle body. . Thereby, in the hinge pillar inner lower 22, for example, as shown in FIG. 16, the bending deformation such that the bending promoting portions 90 and 91 protrude outward in the vehicle body width direction X is promoted.

  FIG. 16 shows an example of bending deformation of the hinge pillar inner lower 22 on the left side of the vehicle body, but the same bending deformation may occur in the hinge pillar inner lower 22 on the right side of the vehicle body.

  As shown in FIGS. 12 and 14, the bending promoting portions 90 and 91 formed in the left and right hinge pillar inner lowers 22 are disposed adjacent to the vehicle body rear side of the second joint surface portion 14 of the gusset member 12. ing.

  When an impact load is input to the hinge pillar 20 from the front of the vehicle body due to a small overlap collision or the like, in addition to the direct transmission route from the load input portion in the hinge pillar 20 to the side surface portion 22a of the hinge pillar inner lower 22, the hinge pillar The impact load is transmitted from the indirect transmission route from 20 through the dash panel 10 and the gusset member 12 once.

  As described above, the stress with respect to the impact load transmitted to the side surface portion 22a of the hinge pillar inner lower 22 via the gusset member 12 is the bending promoting portion 90 adjacent to the vehicle body rear side of the second joint surface portion 14 of the gusset member 12. Since it becomes easy to concentrate on 91, the bending deformation mentioned above is accelerated | stimulated more effectively.

[Positional relationship of each member]
15 is a cross-sectional view taken along the line G-G in FIG. 1 when a connection portion between the lower end of the hinge pillar 20 and the front end of the side sill 4 is viewed from above the vehicle body.

  FIG. 15 shows a front end portion of the side sill outer 5 disposed below the internal space of the hinge pillar 20. The front end 5 f of the upper surface portion 5 b of the side sill outer 5 is disposed adjacent to the vehicle body rear side of the front surface portion 21 b of the hinge pillar outer 21. A first outer reinforcing panel 26 is interposed between the front end 5 f of the side sill outer 5 and the front surface portion 21 b of the hinge pillar outer 21. A notch 5 g is formed in a corner portion on the outer side in the vehicle body width direction X at the front end portion of the upper surface portion 5 b of the side sill outer 5.

  The front end 8 f of the upper surface reinforcing portion 8 b of the side sill outer reinforcing member 8 joined to the inner surface of the side sill outer 5 is disposed on the vehicle rear side of the front end 5 f of the side sill outer 5. A notch 8g is also formed in a corner portion on the outer side in the vehicle body width direction X at the front end portion of the upper surface reinforcing portion 8b of the side sill outer reinforcing member 8. The notch 8g is disposed adjacent to the rear side of the notch 5g of the side sill outer 5 in the vehicle body.

  The first inner rain 60 and the second inner rain 70 and the third inner rain 80 (see FIG. 6 and FIG. 10A) located on the lower side of the vehicle body are arranged with a gap inside the side sill outer 5 in the vehicle body width direction X. ing.

  The front end of the first inner rain 60 is disposed on the rear side of the vehicle body with respect to the front end 5f of the side sill outer 5, and is disposed at substantially the same vehicle front-rear direction Y position as the front end 8f of the side sill outer reinforcing member 8. The front ends of the second inner rain 70 and the third inner rain 80 located on the vehicle body lower side of the first inner rain 60 are also arranged at substantially the same vehicle front-rear direction Y position as the front end of the first inner rain 60 (see FIG. 6).

  As shown in FIG. 10A, the second side surface 71 of the second inner rain 70 and the third side surface 81 of the third inner rain 80 overlap with the upper flange portion 5d of the side sill outer 5 in the vehicle body vertical direction Z. The upper flange portion 5 d is disposed opposite to the outer side in the vehicle body width direction X of the second side surface portion 71 and the third side surface portion 81.

  That is, the first inner rain 60, the second inner rain 70, and the third inner rain 80 are the first, second and third inner rains 60, 70 when the impact load is input from the front side of the oblique vehicle body outside the vehicle body width direction X. The front part 21b of the hinge pillar outer 21 enters the front side of the vehicle body 80 (see FIG. 17) and the upper flange part of the side sill outer 5 on the second and third side parts 71, 81 of the second and third inner rains 70, 80. 5d is arranged so as to contact (see FIG. 18).

  As shown in FIG. 6, the bending promoting portion 90 formed on the side surface portion 22 a of the hinge pillar inner lower 22 as described above is disposed adjacent to the vehicle body front side of the front end portion of the first inner rain 60. Further, the bending promoting portion 90 is disposed along the front end portion of the first inner rain 60 in a side view of the vehicle body.

  6 shows the positional relationship between the bending promoting portion 90 and the first inner rain 60 in the hinge pillar 20 on the left side of the vehicle body, the position between the bending promoting portion 91 and the first inner rain 60 in the hinge pillar 20 on the right side of the vehicle body. The relationship is similar.

  Due to the arrangement of the bending promoting portions 90 and 91, when an impact load is input to the hinge pillar 20 from the front side of the vehicle body, the bending promoting portions 90 and 91 protrude outward in the vehicle body width direction X as described above. By bending and deforming, the front end portions of the first, second, and third inner rains 60, 70, 80 adjacent to the rear side of the bending promoting portions 90, 91 in the vehicle body longitudinal direction Y are also displaced outward in the vehicle body width direction X. (See FIGS. 17 and 18). Thereby, when an impact load is input to the hinge pillar 20 from the front side of the oblique vehicle body outside the vehicle body width direction X, the impact load is easily input to the first closed section S3 and the second closed section S4.

  At this time, the entire front end portion of the first inner rain 60 disposed along the bending promoting portions 90 and 91 in the vehicle body side view is uniformly displaced outward in the vehicle body width direction X. The impact load from the front side is easily input uniformly to the entire front end portion of the first inner rain 60.

[Function and effect]
17 and 18, the front wheel retracted diagonally outward against the vehicle body due to the small overlap collision and contacted the hinge pillar 20, and the front wheel tire sandwiched between the hinge pillar 20 and the collision object 100 was punctured. After that, the front-wheel-side suspension member 98 that continues to recede to the outside in a tilted posture comes into contact with the hinge pillar 20 so that the collision between the collision object 100 and the hinge pillar 20 via the suspension member 98 further occurs. An example is shown.

  Specifically, FIG. 17 is a cross-sectional view of the connecting portion between the lower end portion of the hinge pillar 20 and the front end portion of the side sill 4 in the above-described collision form, as viewed from above the vehicle body, and FIG. It is the HH sectional view taken on the line of FIG. 17 seen from the side.

  In the collision mode in FIG. 17, a part of the cab side outer 48 that is pushed obliquely toward the rear of the vehicle body in the vehicle body width direction X by the suspension member 98, a part of the front surface portion 21 b of the hinge pillar outer 21, A part of the first outer reinforcing panel 26 enters the front side of the vehicle body of the first, second, and third inner rains 60, 70, and 80 displaced outward in the vehicle body width direction X by the bending promoting portions 90 and 91 as described above. Get caught.

  At this time, a bent deformation portion 21f that protrudes inward in the vehicle body width direction X is generated in the front surface portion 21b of the hinge pillar outer 21, and the bent deformation portion 21f and its peripheral portion are the first, second, and third inner rain. It catches on the front end of 60, 70, 80.

  Further, the rear end portion of the first outer reinforcing panel 26 and the front end portion of the second outer reinforcing panel 28 are caught in the notch 5 g formed at the front end portion of the side sill outer 5.

  In this state, the side sill outer 5 and the first, second, and third inner rains 60, 70, and 80 are all suspended via the first outer reinforcing panel 26, the hinge pillar outer 21, and the cab side outer 48. The impact load from is input. Therefore, the first, second, and third inner rains 60, 70, and 80 are urged to move backward together with the side sill outer 5, and thereby, the side sill relative to the first, second, and third inner rains 60, 70, and 80 is promoted. The retreat of the outer 5 is suppressed.

  Further, at this time, as shown in FIG. 18, the upper flange portion 5d of the side sill outer 5 comes into contact with the second and third side surface portions 71 and 81 of the second and third inner rains 70 and 80 from the outside in the vehicle body width direction X. . As a result, a third closed cross-section S6 that is continuous in the vehicle body longitudinal direction Y is newly formed between the hinge pillar inner lower 22, the third inner rain 80, and the side sill outer 5.

  As described above, since the retreat of the side sill outer 5 relative to the second and third inner rains 70 and 80 is suppressed, the load transmission to the rear side of the vehicle body is transmitted in the newly formed third closed section S6. Can be effective.

  The first closed cross section S3 transmits the impact load input from the front end side of the first inner rain 60 to the rear side of the vehicle body at a height position above the side sill 4 in the vehicle body. The second closed cross-section S4 is a rear side of the vehicle body that receives the impact load input from the front end side of the second and third inner rains 70, 80 or the above-mentioned third closed cross-section S6 side at substantially the same height as the upper end of the side sill 4. To communicate.

  As described above, a plurality of closed sections S3 and S4 are formed between the hinge pillar inner lower 22 and the first, second, and third inner rains 60, 70, and 80, so that there is only one closed section. Since the stress applied to the first, second, and third inner rains 60, 70, and 80 is dispersed by the impact load from the front side of the vehicle body as compared with the case where it is formed, the first, The yield strength of the second and third inner rains 60, 70, 80 can be increased.

  The rear end side of the first closed cross section S3 and the second closed cross section S4 is the above-described focused closed cross section S5 at the vehicle body longitudinal direction Y position that overlaps the curved corner portion 42 (see FIGS. 1 and 4) of the door opening 40. (See FIG. 11). Moreover, as shown in FIG. 6, the ridge line L1 (see FIG. 6) formed by the corner portion C1 (see FIG. 10 (a)) of the first closed cross section S3 described above and the hinge pillar inner lower 22 in the vehicle body side view. The line L2 formed by the upper surface portion 22c and the upper surface portion 6b of the side sill inner 6 is arranged to be continuous with each other in the vehicle body longitudinal direction Y.

  Therefore, the impact load transmitted to the vehicle body rear side by the first closed cross section S3 and the second closed cross section S4 is smoothly transmitted to the converged closed cross section S5 while avoiding stress concentration on the curved corner portion 42 of the door opening 40. be able to. Therefore, the moment acting in the direction of tilting the hinge pillar 20 to the rear side of the vehicle body while effectively distributing the impact load input to the hinge pillar 20 to the rear side of the vehicle body in the portion including the height position above the side sill 4. Can be suppressed.

  Further, as described above, the rear end side of the converging closed section S5 is connected to the closed section S2 of the side sill 4 (see FIG. 11C). Therefore, smooth load transmission from the first closed cross section S3 and the second closed cross section S4 to the closed cross section S2 of the side sill 4 via the converging closed cross section S5 can be realized. Therefore, the load distribution to the vehicle body rear side via the side sill 4 can be effectively performed, and thereby the backward movement of the hinge pillar 20 and the dash panel 10 is suppressed, thereby suppressing the deformation of the passenger compartment. it can.

  While the present invention has been described with reference to the above-described embodiments, the present invention is not limited to the above-described embodiments.

  For example, in the above-described embodiment, the example in which the outer hinge pillar member is configured by one hinge pillar outer 21 and the inner hinge pillar member is configured by the hinge pillar inner lower 22 and the hinge pillar inner upper 23 has been described. The outer hinge pillar member may be composed of a plurality of members, or the inner hinge pillar member may be composed of one or three or more members.

  In the above-described embodiment, an example in which a part of the closed cross-section constituent part is configured by the inner hinge pillar member has been described. However, in the present invention, a part of the closed cross-section constituent part is configured by the outer hinge pillar member. Is also applicable.

  Furthermore, in the above-described embodiment, the example in which the bending promoting portion is formed to extend intermittently has been described. However, in the present invention, the bending promoting portion may be formed to extend continuously.

  As described above, according to the present invention, the impact load input to the hinge pillar from the front side of the vehicle body is effectively distributed to the rear side of the vehicle body, thereby effectively retreating the hinge pillar and the dash panel, and thus the deformation of the passenger compartment. Therefore, it may be suitably used in the manufacturing industry of automobiles having hinge pillars and side sills.

DESCRIPTION OF SYMBOLS 1 Automobile 2 Floor panel 3 Toe board 4 Side sill 5 Side sill outer 6 Side sill inner 10 Dash panel 20 Hinge pillar 21 Hinge pillar outer 22 Hinge pillar inner lower 22g Horizontal bead part 22h 1st vertical bead part 22i 2nd vertical bead part 22l Horizontal bead part 22l Vertical bead part 22n Corner part 22A Pillar part 22B Curved part 22C Rear extension part 23 Hinge pillar inner upper 26 First outer reinforcement panel 28 Second outer reinforcement panel 30 Front pillar 36 Roof rail 38 Center pillar 40 Door opening 42 Curved corner part 48 Cab Side outer 50 Hinge reinforcement 60 First inner reinforcement (first reinforcing member)
70 Second inner reinforcement (second reinforcing member)
80 3rd inner reinforcement (3rd reinforcement member)
90, 91 Bending promotion portion 98 Suspension member 100 Colliding object S1 Closed cross section of hinge pillar S2 Closed cross section of side sill S3 First closed cross section S4 Second closed cross section S5 Converging closed cross section S6 Third closed cross section

Claims (12)

A hinge pillar having a hinge pillar member that forms a closed cross section that is continuous in a vertical direction of the vehicle body at a side portion of the vehicle body;
A side sill having a side sill member that forms a closed cross section that is continuous in the vehicle front-rear direction on the vehicle rear side of the hinge pillar at a side portion of the vehicle body;
From the first closed cross section and the second closed cross section arranged at the connecting portion between the lower end portion of the hinge pillar and the front end portion of the side sill so as to be aligned in the vertical direction of the vehicle body, and from the first closed cross section and the second closed cross section Is also provided with a closed cross-section component that forms a third closed cross-section disposed on the rear side of the vehicle body so as to be continuous in the longitudinal direction of the vehicle body ,
The first closed cross section is formed between a first side surface portion facing the hinge pillar member in the vehicle body width direction and the hinge pillar member,
The second closed cross section is formed between the hinge pillar member and a second side surface portion facing the hinge pillar member in the vehicle body width direction on the vehicle body lower side than the first side surface portion,
The third closed section is formed between a third side surface portion joined to a rear end portion of the first side surface portion and a rear end portion of the second side surface portion, and the hinge pillar member,
A side body structure of a vehicle, wherein a rear end side of the third closed section is connected to the closed section of the side sill. Between the lower end portion of the rear edge portion of the hinge pillar and the front end portion of the upper edge portion of the side sill, a curved corner portion constituting a part of the peripheral edge of the door opening is formed,
2. The vehicle side body structure according to claim 1, wherein a front end portion of the third closed cross section is disposed at a vehicle longitudinal direction position that overlaps the curved corner portion. A ridge containing the upper edge corner portion of the first side surface portion before Symbol first closed section, said the line formed by the upper surface portion of the side sill in side view of the vehicle body, arranged so as to be continuous with each other in the longitudinal direction of the vehicle body The side body structure of a vehicle according to claim 1 or 2, wherein the side body structure is a vehicle.   4. The side body structure of a vehicle according to claim 3, wherein a vehicle body vertical dimension of the first closed section increases toward a vehicle body front side. 5.   The first closed cross section is formed between the hinge pillar member and a first reinforcing member having a hat-shaped cross section that is arranged to extend in the longitudinal direction of the vehicle body and joined to the hinge pillar member. The side part vehicle body structure of the vehicle according to claim 3 or 4. A second reinforcing member and a third reinforcing member extending in the longitudinal direction of the vehicle body are joined to the hinge pillar member,
The second reinforcing member has a front Stories second side portion, an upper surface portion extending from the upper end of the second side portion to said hinge pillar member, an end portion opposite to the at the upper face the second side surface portion An upper flange portion that is provided to be joined to the hinge pillar member,
The third reinforcing member includes a third side surface portion, a lower surface portion extending from a lower end of the third side surface portion toward the hinge pillar member, and an end portion of the lower surface portion opposite to the third side surface portion. A lower flange portion provided and joined to the hinge pillar member;
The second closed section includes the hinge pillar member, the second side surface portion and the upper surface portion of the second reinforcing member, and the third side surface portion and the lower surface portion of the third reinforcing member,
The third side surface portion includes a base portion joined to the second side surface portion, and an upper extension portion extending upward from the base portion and joined to the first side surface portion,
The side body structure of a vehicle according to claim 5 , wherein the third closed section includes the hinge pillar member and the third side surface portion and the lower surface portion of the third reinforcing member. . The hinge pillar member is an inner hinge pillar member that constitutes a vehicle body width direction inner portion of the hinge pillar,
The inner hinge pillar member has a bending promoting portion that is continuously bent in the vertical direction of the vehicle body so as to bend and deform so as to protrude outward in the vehicle width direction due to stress concentration with respect to the impact load input to the hinge pillar from the front side of the vehicle body. Or provided to extend intermittently,
The side part of the vehicle according to any one of claims 1 to 6 , wherein the bending promoting part is disposed adjacent to a front side of a vehicle body of a front end part of the closed cross-section constituent part. Body structure. The side body structure of a vehicle according to claim 7 , wherein the bending promoting portion includes a vertical bead portion formed on the inner hinge pillar member so as to extend in a vertical direction of the vehicle body. The side body structure of a vehicle according to claim 7 or 8 , wherein the bending promoting portion includes one end portion of a lateral bead portion formed on the inner hinge pillar member so as to extend in a longitudinal direction of the vehicle body. . The said bending promotion part contains the corner part which forms the ridgeline extended in a vehicle body up-down direction in the peripheral edge of the recessed part or convex part of the said inside hinge pillar member, The any one of Claims 7-9 characterized by the above-mentioned. Side body structure of the vehicle. The bending promoting portion includes a boundary portion between a predetermined high-rigidity portion provided in the inner hinge pillar member and a low-rigidity portion including a portion having lower rigidity than the high-rigidity portion in the inner hinge pillar member. The side body structure of a vehicle according to any one of claims 7 to 10 . The side body of a vehicle according to any one of claims 7 to 11 , wherein the bending promoting portion is disposed along a front end portion of the closed cross-section constituting portion in a side view of the vehicle body. Construction.

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