JP6540753B2 - Side body structure of car - Google Patents

Description

  The present invention relates to a side vehicle body structure of an automobile in which a scuff plate is mounted through a plate mounting bracket provided on the upper surfaces of left and right side sills in a vehicle such as an automobile.

  In a vehicle such as an automobile, when another vehicle collides with the side of the vehicle or when the side of the vehicle collides with the obstacle, a side collision load, which is a collision load applied from the side of the vehicle, is Cross members are provided to connect the left and right side sills in order to transmit and disperse the side sills.

  This cross member may be used not only as a load transfer path for transmitting a side collision load applied to one side in the vehicle width direction to the other side in the vehicle width direction, but also as a member for mounting a seat on which an occupant sits. (See Patent Document 1).

  By the way, in order to efficiently transmit the side impact load from the side of the vehicle from the side sill outer panel to the side sill inner panel, the upper surface position of the side sill inner panel and the upper surface position of the cross member in the vehicle vertical direction Preferably, the top surface of the cross member is joined to the top surface of the side sill inner panel with substantially

  However, since the upper surface position of the cross member in the vertical direction of the vehicle is limited according to the seating surface height of the seat on which the occupant sits, the upper surface position of the side sill inner panel substantially matches the upper surface position of the cross member The upper surface position of the side sill in the vertical direction of the vehicle is also limited by the seat height of the seat.

  Furthermore, in recent years, there is also a need to reduce the opening of the side sill in order to secure sound insulation in the vehicle interior. In this case, the scuff plate fitted and attached to the side sill is attached to the side sill through the plate mounting bracket provided on the upper surface of the side sill inner panel.

  Then, it is necessary to further lower the upper surface position of the side sill inner panel, which is set in accordance with the seat height of the seat, to the lower side of the vehicle by the provision of the plate mounting bracket.

  For this reason, in an automobile in which the scuff plate is attached to the side sill inner panel via the plate mounting bracket, there is a possibility that the load transfer efficiency from the side sill outer panel to the side sill inner panel may be reduced.

  Therefore, if the upper surface position of the side sill outer panel is lowered below the vehicle in accordance with the upper surface position of the side sill inner panel, the cross sectional area of the side sill in the longitudinal cross section along the vehicle width direction becomes smaller. New problems that could not be secured could occur.

  In particular, a side sill in the vicinity of the center pillar is more likely to be subjected to a side impact load larger than that of the side sill in the vicinity of the plate mounting bracket, so a reduction in cross sectional area and a reduction in load transfer efficiency are undesirable from the viewpoint of occupant protection. There was a problem that.

JP, 2010-228482, A

  In view of the above problems, the present invention provides a side vehicle body structure of an automobile capable of suppressing a reduction in load transfer efficiency near the center pillar even when a plate mounting bracket for mounting a scuff plate is provided on a side sill. Intended to be provided.

  According to the present invention, a pair of left and right side sills extending in the longitudinal direction of the vehicle, a pair of left and right center pillars whose lower ends are joined to the side sills, and substantially extending above the vehicle, and left and right side sills forward of the vehicle than the center pillars And a cross member for connecting the side sill, the side sill being a hat-like side sill outer panel having a cross-section and a hat-like cross section projecting outward in the vehicle width direction, and the side sill outer panel And a side sill inner panel having a substantially hat-shaped cross section projecting inward in the vehicle width direction, wherein an upper surface portion of the side sill outer panel is an outer upper surface portion, and an upper surface portion of the side sill inner panel is an inner upper surface portion; In the outer upper surface portion and the inner upper surface portion, the outer edge in the vehicle width direction is outside A plate mounting bracket to which a scuff plate is attached is joined to a position substantially in the same longitudinal direction of the vehicle as the cross member, with the edge being the edge and the inner edge in the vehicle width direction being the inner edge, The upper surface portion of the member, which is the upper surface portion of the member, is joined, and the cross-sectional shape of the inner upper surface portion in the longitudinal cross section along the vehicle width direction is higher than the inner edge of the outer upper surface portion in the longitudinal cross section through the cross member. The outer edge is formed in a cross-sectional shape in which the outer edge is located at a position under the vehicle, and the outer edge is located at the same position in the vertical direction of the vehicle as the inner edge of the upper surface in the vertical cross section through the center pillar. It is characterized in that it is formed in the following cross-sectional shape.

The outer upper surface portion, for example, in a longitudinal cross section along the vehicle width direction, is formed by press forming in a cross-sectional shape inclined so that the inner edge is slightly above the vehicle with respect to the outer edge It can be done.
The inner upper surface portion is formed by press forming, for example, in a cross-sectional shape in which the outer edge is positioned slightly above the vehicle with respect to the inner edge in a longitudinal cross section along the vehicle width direction It can be

  According to the present invention, even when the plate mounting bracket for mounting the scuff plate is provided on the side sill, it is possible to suppress a decrease in load transfer efficiency in the vicinity of the center pillar.

  Specifically, in the vicinity of the center pillar, since the outer edge of the inner upper surface and the inner edge of the outer upper surface are located at substantially the same position in the vertical direction of the vehicle, the side body structure of the automobile is When a side impact load is applied in the vicinity of the side impact load, the side impact load can be efficiently transmitted from the side sill outer panel to the side sill inner panel.

  For this reason, even when the plate mounting bracket is provided on the inner upper surface portion in front of the vehicle than the center pillar, the side vehicle body structure of the vehicle is such that the load transfer efficiency of the side collision load in the vicinity of the center pillar decreases. Can be suppressed.

  Furthermore, since the side vehicle body structure of the automobile can secure a large longitudinal sectional area in the vicinity of the center pillar, the rigidity of the side sill in the vicinity of the center pillar can be improved. Therefore, the side vehicle body structure of the automobile can suppress a decrease in load transfer efficiency with respect to a front collision load which is a collision load from the front of the vehicle or a rear collision load which is a collision load from the rear of the vehicle.

  Therefore, in the side vehicle body structure of the automobile, even when the plate mounting bracket for mounting the scuff plate is provided on the side sill, it is possible to suppress a decrease in load transfer efficiency in the vicinity of the center pillar.

As an aspect of the present invention, the inner upper surface portion facing the lower side of the vehicle with respect to the plate mounting bracket is provided with a recessed portion which is recessed toward the lower side of the vehicle.
The recessed portion may be, for example, a portion formed by two-step press molding, and may be a portion recessed in a substantially square frustum shape whose long side is on the upper side of the vehicle.

  According to the present invention, the side body structure of an automobile is, for example, when fitting a scuff plate to the plate mounting bracket via the clip, a desired clearance between the clip of the scuff plate and the inner upper surface of the side sill inner panel. Can be easily secured.

  For this reason, the side body structure of the automobile can make the outer edge of the inner upper surface portion other than the recessed portion closer to the inner edge of the outer upper surface portion, and secure a long length in the vehicle longitudinal direction can do.

  Thus, the side vehicle body structure of the automobile can suppress the reduction in the load transfer efficiency from the side sill outer panel to the side sill inner panel when a side collision load is applied in the vicinity of the cross member.

  In addition, since the side body structure of the automobile can secure a large cross-sectional area of the side sill in the longitudinal cross section along the vehicle width direction by the recessed portion, the rigidity of the side sill against the frontal crash load or the rear crash load is further improved. Can.

  Therefore, the side car body structure of the automobile suppresses both the decrease in the load transfer efficiency near the center pillar and the decrease in the load transfer efficiency near the cross member by the recessed portion provided on the inner upper surface portion be able to.

  Further, as an aspect of the present invention, the inner upper surface portion is formed in a shape having an inner edge extending substantially horizontally in the vehicle longitudinal direction in a side view, and a raised portion protruding toward the vehicle upper direction on the inner upper surface portion. The top of the raised portion is located at substantially the same position in the vertical direction of the vehicle as the inner edge of the outer upper surface in a longitudinal cross section along the vehicle width direction through the center pillar.

  According to the present invention, since the side body structure of the automobile can support the center pillar from the inside in the vehicle width direction at a higher position in the vehicle vertical direction, the support rigidity of the center pillar against a side collision load can be improved. Therefore, the side vehicle body structure of the automobile can suppress the decrease in load transfer efficiency in the vicinity of the center pillar and can suppress the falling of the center pillar at the time of a side collision.

  Further, as an aspect of the present invention, the inner upper surface portion is formed in a substantially flat shape having an outer edge which extends substantially linearly from the cross member to the center pillar in a side view.

  According to the present invention, the side vehicle body structure of the automobile is more efficient in, for example, frontal or rear collision load compared to an inner upper surface portion having an outer edge formed by recessing and / or projecting in the vehicle vertical direction. It can be well transmitted.

  Therefore, in the side vehicle body structure of the automobile, even when the plate mounting bracket for mounting the scuff plate is provided on the side sill, it is possible to further suppress the decrease in load transfer efficiency in the vicinity of the center pillar.

  Further, as an aspect of the present invention, in the side sill inner panel, a portion extended downward from the inner edge of the inner upper surface of the inner vehicle is used as an inner side wall, inside the side sill and at least the cross from the vicinity of the center pillar. A reinforcement member joined to the inner upper surface portion of the side sill inner panel and the inner side surface portion is provided while having a length in the vehicle longitudinal direction leading to a member.

  According to the present invention, the side body structure of the automobile can further improve the rigidity of the side sill inner panel in the range in the vehicle longitudinal direction from the vicinity of the center pillar to the cross member.

  Thereby, the side vehicle body structure of the vehicle improves the load transfer efficiency in the range of the vehicle longitudinal direction in which the inner edge of the outer upper surface and the outer edge of the inner upper surface do not substantially coincide at the vertical position of the vehicle. Can. Therefore, the side vehicle body structure of the automobile can reliably transmit the side collision load applied to the side sill inner panel from one side in the vehicle width direction toward the other side in the vehicle width direction.

  Further, as an aspect of the present invention, the inner side surface portion of the side sill inner panel is disposed at a lower portion which is a lower portion of the vehicle and a position offset to the lower portion with respect to the lower portion. An upper portion of the upper surface of the member, and a front surface portion of the upper surface portion of the upper surface portion of the cross member extending from the front edge of the vehicle front side; And a member rear surface portion extended substantially downward of the vehicle, wherein the reinforcing member is joined to the inner upper surface portion and the upper portion of the inner side surface portion, and the upper member portion of the cross member is the inner surface. The reinforcing member is joined to the reinforcing member through the upper surface portion, and the member front surface portion and the member rear surface portion of the cross member are reinforced through the upper portion of the inner side surface portion. Those bonded to wood.

According to the present invention, the side vehicle body structure of the automobile can achieve both the weight reduction of the side sill and the suppression of the decrease in the load transfer efficiency with respect to the side collision load.
Specifically, the inner side surface portion of the side sill inner panel is configured by the lower portion and the upper portion offset in the vehicle width direction, so that the side body structure of the automobile has a substantially flat inner side surface portion. The weight of the side sill can be reduced compared to the weight of the side sill.

Furthermore, since the upper surface of the cross member, the front surface and the rear surface of the cross member are joined to the reinforcing member, the side vehicle body structure of the vehicle further improves the joint strength between the cross member and the side sill inner panel. Can.
As a result, the side body structure of the vehicle can transmit load transfer efficiency against side collision load in the vicinity of the cross member where the inner edge of the outer upper surface and the outer edge of the inner upper surface do not substantially coincide at the vertical position of the vehicle. It can be improved more.

Therefore, the side vehicle body structure of the vehicle can transmit the side impact load applied to the side sill inner panel from one side in the vehicle width direction more reliably toward the other side in the vehicle width direction via the cross member.
Therefore, the side vehicle body structure of the automobile can achieve both the weight reduction of the side sill and the suppression of the decrease in the load transfer efficiency with respect to the side collision load.

  According to the present invention, it is possible to provide an automobile side vehicle body structure capable of suppressing a decrease in load transfer efficiency in the vicinity of the center pillar even when the plate mounting bracket for mounting the scuff plate is provided on the side sill.

BRIEF DESCRIPTION OF THE DRAWINGS The external appearance perspective view which shows the external appearance of the side vehicle body in a motor vehicle, and a lower vehicle body. The principal part appearance perspective view showing the principal part appearance of the side sill seen from the vehicles front upper part. The principal part top view which shows the principal part of the side sill in planar view. The side view in the AA arrow in FIG. BB arrow sectional drawing in FIG. CC arrow sectional drawing in FIG. DD arrow sectional drawing in FIG. FIG. 10 is a main part external perspective view showing the main part external appearance of the side sill in Example 2; FIG. 10 is a plan view of relevant parts showing the relevant parts of the side sill in the second embodiment. The side view in the EE arrow in FIG. F-F arrow sectional drawing in FIG. GG arrow sectional drawing in FIG. The external appearance perspective view which shows the internal structure of the side sill in another embodiment. The side view which shows the side view of the side sill in another embodiment. The HH arrow in FIG. 14, and the II arrow sectional view.

  An embodiment of the invention will now be described in conjunction with the drawings.

The side vehicle body structure of the automobile 1 in the first embodiment will be described in detail with reference to FIGS. 1 to 7.
1 shows an outer appearance perspective view of the side vehicle body and the lower vehicle body in the automobile 1, FIG. 2 shows an outer appearance perspective view of the main part of the side sill 4 seen from the front upper side of the vehicle, and FIG. 4 shows a side view taken along the line A-A in FIG. 3, FIG. 5 shows a cross-sectional view taken along the line B-B in FIG. 3, and FIG. 6 shows an arrow taken along the line C-C in FIG. FIG. 7 shows a sectional view, and FIG. 7 shows a sectional view taken along the line DD in FIG.

Moreover, in FIG.2 and FIG.4, the front side reinforcement member 15 and the back side reinforcement member 16 are shown in figure by the broken line.
Further, in the drawings, arrows Fr and Rr indicate the front-rear direction, arrow Fr indicates the front, and arrow Rr indicates the rear.

Furthermore, arrows Rh and Lh indicate the width direction, arrow Rh indicates the right direction, and arrow Lh indicates the left direction, with the vehicle interior side in the vehicle width direction being the inside of the vehicle width direction, and the vehicle outside in the vehicle width direction On the outside in the vehicle width direction.
In addition, the upper side in FIG. 1 is the upper side, and the lower side in FIG. 1 is the lower side.

  As shown in FIG. 1, the automobile 1 in the present embodiment is capable of opening and closing a pair of left and right hinge pillars 2 for supporting opening and closing front doors (not shown) which are opened and closed for passengers to get on and off. A pair of left and right center pillars 3 to be supported, a lower portion of the hinge pillar 2 and a lower portion of the center pillar 3 are joined, and left and right side sills 4 extending in the longitudinal direction of the vehicle The pair of rear side frames 5 constitute frameworks of the side and lower portions of the vehicle body.

  Furthermore, as shown in FIG. 1, the automobile 1 has a floor panel 6 that forms the floor of the cabin between the left and right side sills 4 and a rear floor panel 7 that forms the floor of the luggage compartment between the left and right rear side frames 5. And constitute a partition that separates the vehicle compartment from the outside of the vehicle.

  In addition, as shown in FIG. 1, the automobile 1 is a reinforcing member for reinforcing the frame of the vehicle body, the first cross member 8 disposed on the upper surface of the floor panel 6 between the left and right side sills 4 and the rear side frame 5. , The second cross member 9, the third cross member 10, and the fourth cross member 11 in this order from the front of the vehicle.

  And, at the lower end of the entrance which is an opening for the passenger surrounded by the hinge pillar 2, the center pillar 3 and the side sill 4 to get on / off, there is a scuff plate 12 (see FIG. 6) which forms a design surface at the lower end of the entrance. It is attached.

  The scuff plate 12 is attached to a first plate mounting bracket 13 and a second plate mounting bracket 14 provided on the upper surface of the side sill 4 (the upper inner surface 424 of the side sill inner panel 42 described later).

  In addition, since the right side of the vehicle 1 and the left side of the vehicle 1 are symmetrical targets, in the present embodiment, the vehicle body structure on the right side of the vehicle is mainly described, and the detailed description of the vehicle body structure on the left side of the vehicle is omitted.

The hinge pillar 2 has a closed cross-sectional shape extending in the vertical direction of the vehicle, although the detailed illustration is omitted, and the front end of the side sill 4 is joined to the lower portion thereof.
Further, as shown in FIG. 1 and FIG. 4, the center pillar 3 is formed in an end-spread shape in which the length in the vehicle front-rear direction becomes longer toward the lower side of the vehicle in a side view.

  As shown in FIGS. 3 and 5, in the longitudinal cross section along the vehicle width direction, the center pillar 3 has the side frame outer panel 31, the center pillar outer panel 32, and the center pillar inner panel 33 outside the vehicle width direction. It joins and comprises in this order from.

  As shown in FIGS. 3 and 5, the side frame outer panel 31 is a panel member that forms an appearance design surface of the automobile 1, and the lower end thereof is a side surface of the side sill 4 in the vehicle width direction outer side (outer side surface portion 413 described later) Bonded to.

  The center pillar outer panel 32, as shown in FIGS. 3 and 5, is a panel member extending in the vertical direction of the vehicle, and is formed to form a closed cross-sectional shape extending in the vertical direction of the vehicle with the center pillar inner panel 33. .

  The lower end of the center pillar outer panel 32 is joined to the side surface (outer side surface portion 413) of the side sill 4 above the lower end of the side frame outer panel 31 with respect to the vehicle.

  The center pillar inner panel 33, as shown in FIGS. 3 and 5, is a panel member extending in the vertical direction of the vehicle, and is formed to form a closed cross-sectional shape extending in the vertical direction of the vehicle with the center pillar outer panel 32. . The center pillar inner panel 33 is formed with an opening S in which a portion located above the side sill 4 is opened with a predetermined size in a side view.

  Further, as shown in FIGS. 5 to 7, the pair of left and right side sills 4 is located on the outer side in the vehicle width direction across the center pillar inner panel 33 and extends in the vehicle longitudinal direction with the side sill outer panel 41. And a side sill inner panel 42 extending in the longitudinal direction of the vehicle.

  As shown in FIGS. 5 to 7, the side sill outer panel 41 is substantially hat-shaped in cross section projecting longitudinally outward in the vehicle width direction, and is substantially rectangular in section with the center pillar inner panel 33. Is formed to have a closed cross-sectional shape.

  Specifically, as shown in FIGS. 5 to 7, the side sill outer panel 41 has an outer lower flange portion 411 joined to the lower end of the center pillar inner panel 33 in a longitudinal cross section along the vehicle width direction, and a side sill outer panel Outer lower surface portion 412 forming the lower surface of 41, outer side surface portion 413 forming the side surface of side sill outer panel 41, outer upper surface portion 414 forming the upper surface of side sill outer panel 41, and outer upper flange portion joined to center pillar inner panel 33 And 415 are integrally formed.

As shown in FIGS. 5 to 7, the outer lower flange portion 411 has a thickness in the vehicle width direction, and a portion facing the center pillar inner panel 33 is formed in a shape along the lower end of the center pillar inner panel 33. ing.
As shown in FIGS. 5 to 7, the outer lower surface portion 412 extends from the upper edge of the outer lower surface flange portion 411 outward in the vehicle width direction and slightly upward in the vehicle, and further from the portion in the vehicle width direction It is formed in the shape integral with the part extended outside and the vehicle upper direction.

As shown in FIGS. 5 to 7, the outer side surface portion 413 is extended from the edge of the outer lower surface portion 412 on the outer side in the vehicle width direction toward the upper side of the vehicle.
The outer upper surface portion 414 is, as shown in FIGS. 5 to 7, a portion extending inward in the vehicle width direction from the upper end of the outer side surface portion 413 and upward in the vehicle, and slightly inward in the vehicle width direction from the portion It is formed in the shape which made integral with the part extended in the vehicle upper direction.

  Although the outer upper surface portion 414 is not shown in detail, the inner edge which is the edge at the inner side in the vehicle width direction is formed in a shape extending substantially horizontally in the vehicle longitudinal direction in a side view. Do.

  The outer upper flange portion 415 is extended toward the upper side of the vehicle from an end portion on the inner side in the vehicle width direction of the outer upper surface portion 414 and is a portion facing the center pillar inner panel 33, as shown in FIGS. Are formed along the center pillar inner panel 33.

  On the other hand, as shown in FIG. 5 to FIG. 7, the side sill inner panel 42 has a substantially hat-shaped cross section projecting longitudinally inward in the vehicle width direction along the vehicle width direction. It is formed to have a closed cross-sectional shape that is substantially rectangular in cross section.

  Specifically, as shown in FIG. 5 to FIG. 7, in the vertical cross section along the vehicle width direction, the side sill inner panel 42 is joined to the outer lower flange portion 411 via the center pillar inner panel 33. Lower flange portion 421, inner lower surface portion 422 forming the lower surface of side sill inner panel 42, inner side surface portion 423 forming the side of side sill inner panel 42, upper surface portion 424 forming the upper surface of side sill inner panel 42, center pillar It is integrally formed with an inner upper flange portion 425 joined to the outer upper flange portion 415 via the inner panel 33.

As shown in FIGS. 5 to 7, the inner lower flange portion 421 has a thickness in the vehicle width direction, and a portion facing the center pillar inner panel 33 is formed in a shape along the lower end of the center pillar inner panel 33. ing.
As shown in FIGS. 5 to 7, the inner lower surface portion 422 extends from the upper end of the inner lower flange portion 421 inward in the vehicle width direction and slightly upward of the vehicle.

  As shown in FIGS. 5 to 7, the inner side surface portion 423 extends upward from the inner edge of the inner lower surface portion 422 in the vehicle width direction toward the upper side of the vehicle. As shown in FIGS. 3 and 4, the inner side surface portion 423 is formed such that the upper end thereof is a substantially horizontal straight line extending in the vehicle longitudinal direction.

As shown in FIGS. 5 to 7, the inner upper surface portion 424 is extended outward from the upper end of the inner side surface portion 423 in the vehicle width direction and slightly upward of the vehicle. The inner upper surface portion 424 will be described in detail later.
The inner upper flange portion 425 is extended toward the upper side of the vehicle from an end portion on the outer side in the vehicle width direction at the inner upper surface portion 424 and is a portion facing the center pillar inner panel 33 as shown in FIGS. Are formed along the center pillar inner panel 33.

  Furthermore, inside the side sill 4 having the above-described configuration, as shown in FIGS. 2, 4, 6, and 7, a front side reinforcing member 15 that extends in the vehicle longitudinal direction to reinforce the side sill 4 and a rear side reinforcement A member 16 is joined to the side sill inner panel 42.

  As shown in FIGS. 2, 4, 6, and 7, the front reinforcing member 15 is joined in a range in the vehicle longitudinal direction from the portion joined near the front end in the lower portion of the center pillar 3 to the front end of the side sill 4. It is done.

  The front reinforcing member 15 has a cross section along the vehicle width direction having a substantially flat portion joined to the inner upper surface portion 424 and a substantially flat portion joined to the inner side surface portion 423. It is formed in a substantially L-shape.

  On the other hand, as shown in FIG. 2 and FIG. 4, the rear reinforcing member 16 has a position slightly ahead of the rear end of the lower portion of the center pillar 3 in the vehicle (a third raised portion 427 described later It is joined in a range in the vehicle longitudinal direction from the position between the fourth raised portion 428) to the rear end of the side sill 4).

  The rear reinforcing member 16 has a longitudinal cross-sectional shape along the vehicle width direction with a substantially flat portion joined to the inner upper surface portion 424 and a substantially flat portion joined to the inner side surface portion 423. It is formed in a substantially L-shaped cross section.

  Further, as shown in FIG. 1, the floor panel 6 is formed in a shape having a tunnel portion 6a which bulges upward and extends in the longitudinal direction of the vehicle at substantially the center in the vehicle width direction. An outer edge of the floor panel 6 in the vehicle width direction is joined to a side sill inner panel 42 of the side sill 4.

  Furthermore, on the lower surface of the floor panel 6, as shown in FIGS. 1 and 5, the front end is located on the outer side in the vehicle width direction, and the floor extends substantially in the vehicle longitudinal direction so as to be located on the inner side in the vehicle width direction The frame 17 is joined. As shown in FIG. 4, the floor frame 17 has a longitudinal cross-sectional shape along the vehicle width direction formed in a substantially hat-shaped cross section opened above the vehicle.

  Further, as shown in FIG. 1, the first cross member 8 is a floor panel so as to connect the left and right side sills 4 via the tunnel portion 6 a at substantially the center in the vehicle longitudinal direction between the hinge pillar 2 and the center pillar 3. It is arranged on the upper surface of 6.

  As shown in FIGS. 4 and 6, the first cross member 8 has a substantially hat-shaped cross section with a longitudinal cross-sectional shape along the longitudinal direction of the vehicle protruding to the upper side of the vehicle, and a substantially flat member as an upper surface portion It has an upper surface portion 81, a substantially flat plate member front surface portion 82 which is a front surface portion, and a substantially flat plate member rear surface portion 83 which is a rear surface portion.

  As shown in FIGS. 3 and 6, the member upper surface portion 81 has a thickness substantially in the vertical direction of the vehicle and is substantially flat extending in the vehicle width direction, and substantially the same as the inner upper surface portion 424 of the side sill inner panel 42. It is disposed at a position in the vertical direction of the vehicle. A front end portion of a seat rail (not shown) of the front seat is fastened and fixed to the member upper surface portion 81.

  At the edge of the member upper surface portion 81 on the outer side in the vehicle width direction, an upper joint portion 84 extending to the outer side in the vehicle width direction and in contact with the inner upper surface portion 424 is formed. The upper joint portion 84 of the member upper surface portion 81 is joined to the front reinforcing member 15 via the inner upper surface portion 424.

  As shown in FIGS. 3 and 4, the member front surface portion 82 extends substantially downward from the edge on the vehicle front side of the member top surface portion 81 and then follows the top surface of the floor panel 6. It is formed in the shape extended in the front. The lower end of the member front surface portion 82 is joined to the floor panel 6, and the front side joint portion 85 extended from the edge on the outer side in the vehicle width direction to the front of the vehicle Bonded to.

  As shown in FIGS. 3 and 4, the member rear surface portion 83 extends from the edge on the vehicle rear side of the member upper surface portion 81 substantially downward to the vehicle, and then follows the upper surface of the floor panel 6. It is formed in the shape extended in the back. The lower end of the member rear surface portion 83 is joined to the floor panel 6, and the rear side joint portion 86 extended to the vehicle rear from the outer edge in the vehicle width direction is a front side reinforcing member via the inner side surface portion 423. It is joined to 15.

  As shown in FIG. 1, FIG. 3 and FIG. 4, the second cross member 9 has the left and right side sills 4 through the tunnel portion 6a at the same position in the longitudinal direction of the vehicle substantially at the center in the longitudinal direction of the vehicle. It arrange | positions on the upper surface of the floor panel 6 so that it may connect. The lower surface of the second cross member 9 is joined to the portion of the floor panel 6 which is inclined downward to the rear of the vehicle.

  As shown in FIG. 4, the second cross member 9 has a longitudinal cross-sectional shape along the longitudinal direction of the vehicle having a substantially M-shaped cross section, and is a front flange located on the vehicle front side and joined to the floor panel 6 91, a rear flange 92 located on the rear side of the vehicle and joined to the floor panel 6, a central flange 93 located between the front flange 91 and the rear flange 92, and a front flange 91 Is integrally formed by a front projection 94 projecting upward from the vehicle between the rear and the central flange 93, and a rear projection 95 projecting upward from the vehicle between the central flange 93 and the rear flange 92 It is done.

  Furthermore, as shown in FIG. 1, the second cross member 9 is connected to the side sill 4 via the first seat mounting bracket 21 positioned on the outer side in the vehicle width direction, and the second cross member 9 is positioned on the inner side in the vehicle width direction. It is connected to the tunnel portion 6 a via the seat mounting bracket 22.

  The first seat mounting bracket 21 and the second seat mounting bracket 22 are members to which the rear end portions of the seat rails of the front seats are fastened and fixed, and the details thereof will be described in detail later.

  As shown in FIG. 1, the third cross member 10 is disposed on the upper surface of the floor panel 6 in the vicinity of the rear end of the floor panel 6 so as to connect the side sill 4 in the vehicle width direction. The third cross member 10 is joined to the side sill 4 and the floor panel 6.

  The fourth cross member 11 is, as shown in FIG. 1, an upper surface of the rear floor panel 7 so as to connect the rear side frame 5 in the vehicle width direction at a position spaced apart from the third cross member 10 by a predetermined distance behind the vehicle. Is located in The fourth cross member 11 is joined to the rear side frame 5 and the rear floor panel 7.

  Further, as shown in FIGS. 2 to 5, the first seat mounting bracket 21 described above has a substantially box-like shape with the vehicle width direction outside and the lower side of the vehicle opening, and has a longitudinal sectional shape along the vehicle width direction The side sill 4 and the second cross member 9 are formed to have a closed cross-sectional shape.

  As shown in FIGS. 2 to 5, the first seat mounting bracket 21 includes a front wall 211 located in front of the vehicle, a rear wall 212 facing the front wall 211 at the rear of the vehicle, and a front wall An end edge on the inner side in the vehicle width direction of the portion 211, and a side wall portion 213 connecting the end edge on the inner side in the vehicle width direction of the rear wall portion 212, and an upper surface portion connecting the upper end of the front wall portion 211 and the upper end of the rear wall portion 212 It is integrally formed by 214 and the flange part 215 joined to the side sill 4.

  Furthermore, as shown in FIG. 2, FIG. 3 and FIG. 5, the upper surface portion 214 is located inside in the vehicle width direction and has a mounting portion 214a which is a flat portion to which the seat rail is mounted, and a vehicle width of the mounting portion 214a. It is integrally formed by an inclined portion 214b inclined outward in the vehicle width direction from the outer side edge in the vehicle width direction and downward in the vehicle, and a step-down portion 214c extended outward in the vehicle width direction from the lower end of the inclined portion 214b.

  As shown in FIG. 2, FIG. 3 and FIG. 5, the step-down portion 214c protrudes substantially upward in the vehicle at the approximate center in the longitudinal direction of the vehicle and extends in the vehicle width direction from the inclined portion 214b to the flange portion 215. The bead 214d is formed to extend to the The bead 214 d is formed to be at substantially the same position in the vehicle front-rear direction with respect to the central flange portion 93 of the second cross member 9.

  In addition, the second seat mounting bracket 22 is substantially symmetrical with respect to the first seat mounting bracket 21 except that the flange portion is joined to the tunnel portion 6a, and thus the detailed description thereof will be omitted.

Subsequently, the first plate mounting bracket 13, the second plate mounting bracket 14, and the side sill inner panel 42 described above will be described in more detail.
First, as shown in FIGS. 1 and 2, the first plate mounting bracket 13 to which the scuff plate 12 is attached is mounted on the inner upper surface portion 424 of the side sill inner panel 42 at substantially the same position in the vehicle longitudinal direction as the first cross member 8. It is joined.

  As shown in FIGS. 2, 4 and 6, the first plate mounting bracket 13 has a generally hat-like shape in a side view projecting to the upper side of the vehicle, and the clip 12a of the scuff plate 12 is fitted on the upper surface portion thereof. The fitting hole 13a is formed to be open.

  On the other hand, as shown in FIG. 1, the second plate mounting bracket 14 is provided on the inner upper surface portion 424 of the side sill inner panel 42 at a position forward of the first plate attachment bracket 13 and behind the hinge pillar 2. It is joined.

  Similar to the first plate mounting bracket 13, the second plate mounting bracket 14 has a generally hat-like shape in a side view projecting to the upper side of the vehicle, and a fitting hole in which the clip 12a of the scuff plate 12 fits is opened in the upper surface portion thereof. It is formed.

  In addition, as shown in FIGS. 2 to 7, the inner upper surface portion 424 of the side sill inner panel 42 has a substantially flat shape extending outward from the upper end of the inner side surface portion 423 in the vehicle width direction and slightly upward. A first flat portion 426, a first concave portion 427 and a second concave portion (not shown) recessed in the lower direction of the vehicle with respect to the flat portion 426, and a first raised in the upper direction of the vehicle with respect to the flat portion 426 The protrusion 428, the second protrusion 429, the third protrusion 430, and the fourth protrusion 431 are integrally formed.

  As shown in FIGS. 5 to 7, in the cross section along the vehicle width direction, the flat plate portion 426 is an outer edge which is an outer edge in the vehicle width direction, an inner edge of the outer upper surface portion 414 of the side sill outer panel 41. It extends from the upper end of the inner side surface portion 423 so as to be located at a position below the vehicle.

  As shown in FIGS. 2 and 5, the first recessed portion 427 is recessed by press molding at a position facing the upper surface portion of the first plate mounting bracket 13 below the vehicle. The first recessed portion 427 has a shape that is recessed in a range that does not become a shadow at the time of press molding, and a vertical cross-sectional shape along the vehicle width direction has an inverted trapezoidal shape whose long side is above the vehicle. It is recessed.

  More specifically, as shown in FIG. 5, the first recessed portion 427 has an outer edge of the flat portion 426 in a longitudinal cross section along the vehicle width direction through the first plate mounting bracket 13 and the first cross member 8. It is formed to extend from the end to the outside in the vehicle width direction and slightly to the lower side of the vehicle, and is formed to connect the flat plate portion 426 and the inner upper flange portion 425.

  In other words, the inner upper surface portion 424 has a cross-sectional shape in a longitudinal cross section along the vehicle width direction through the first plate mounting bracket 13 and the first cross member 8 that is lower than the inner edge of the outer upper surface portion 414. In the position, it is formed in the cross-sectional shape in which the outer edge is located.

  Further, the second recessed portion (not shown) is recessed by press molding at a position facing the upper surface portion of the second plate mounting bracket 14 below the vehicle. The second recessed portion has the same configuration as that of the first recessed portion 427, and thus the detailed description thereof is omitted.

  Further, as shown in FIGS. 2 and 3, each of the first raised portion 428, the second raised portion 429, the third raised portion 430, and the fourth raised portion 431 is an inner side in the vehicle width direction of the inner upper surface portion 424. The flat plate portion 426 and the inner upper flange portion 425 are raised so as to be connected from a position spaced apart from the inner edge which is the edge by a predetermined distance outward in the vehicle width direction.

  As shown in FIGS. 2 and 3, each of the first raised portion 428, the second raised portion 429, the third raised portion 430, and the fourth raised portion 431 is a plan view in which the inner side in the vehicle width direction is a short side. It has a substantially trapezoidal shape, and connects the central inclined portion of a substantially rectangular shape in plan view and a substantially rectangular length in the longitudinal direction of the vehicle on the inner side in the vehicle width direction and the outer side in the vehicle width direction It is comprised by the front side inclined part of the planar view substantially triangle, and the rear side inclined part of the planar view substantially triangular which connects the rear edge of a center inclined part, and the flat part 426. FIG.

  More specifically, as shown in FIG. 3, FIG. 4 and FIG. 7, the first protrusion 428 has a short side in the vehicle width direction at a position substantially in the vehicle longitudinal direction near the front end in the lower portion of the center pillar 3. It is formed in a substantially trapezoidal shape in plan view.

  The central inclined portion 428a of the first raised portion 428 is, as shown in FIG. 7, at a position substantially the same as the inner edge of the outer upper surface portion 414 in the vertical direction along the vehicle width direction. An outer edge of the flat portion 426 is formed to be inclined outward from the outer edge of the flat portion 426 and upward of the vehicle so as to locate the edge.

  As shown in FIGS. 3, 4 and 5, the second raised portion 429 is located near the approximate center of the lower part of the center pillar 3 in the longitudinal direction of the vehicle, in other words, in the longitudinal direction of the vehicle substantially the same as the second cross member 9 It is formed in a generally trapezoidal shape in plan view, with the short side at the inner side in the vehicle width direction.

  As shown in FIGS. 3 and 4, the central inclined portion 429a of the second raised portion 429 is located at the inner side in the vehicle width direction at the inner side in the vehicle width direction at the central inclined portion 428a of the first raised portion 428. The length of the vehicle front-rear direction is slightly shorter than the length in the vehicle front-rear direction of the central inclined portion 428a of the first projection 428.

  Furthermore, as shown in FIG. 5, the central inclined portion 429a of the second raised portion 429 has substantially the same vehicle as the inner edge of the outer upper surface portion 414 in a longitudinal cross section along the vehicle width direction through the second cross member 9. The outer edge of the flat portion 426 is formed to be inclined outward in the vehicle width direction from the outer edge of the flat portion 426 and upward of the vehicle so that the outer edge is located at a position in the vertical direction.

  As shown in FIGS. 2 to 4, the third protuberance 430 has a size substantially equal to that of the second protuberance 429 at a position in the vehicle longitudinal direction slightly separated from the second protuberance 429 toward the rear of the vehicle. It is formed in a substantially trapezoidal shape in plan view.

  Similar to the central inclined portion 429a of the second raised portion 429, the central inclined portion 430a of the third raised portion 430 has substantially the same upper and lower portions as the inner edge of the outer upper surface portion 414 in the longitudinal cross section along the vehicle width direction. At the position of the direction, it is formed in a shape inclined outward from the outer edge of the flat portion 426 in the vehicle width direction and upward of the vehicle so that its outer edge is located.

  As shown in FIGS. 2 to 4, the fourth raised portion 431 is a plan view of approximately the same size as the first raised portion 428 at a position substantially in the vehicle longitudinal direction near the rear end of the lower portion of the center pillar 3. It is formed in a substantially trapezoidal shape.

  The central inclined portion 431a of the fourth raised portion 431 is, like the central inclined portion 428a of the first raised portion 428, substantially the same vehicle upper and lower ends as the inner edge of the outer upper surface portion 414 in the longitudinal cross section along the vehicle width direction. At the position of the direction, it is formed in a shape inclined outward from the outer edge of the flat portion 426 in the vehicle width direction and upward of the vehicle so that its outer edge is located.

  With such a configuration, as shown in FIG. 4, the side sill inner panel 42 is a straight line in which the boundary between the inner side surface 423 and the inner upper surface 424 extends substantially horizontally in the longitudinal direction of the vehicle in a side view. The boundary line which becomes a corner of the inner upper surface part 424 and the inner upper flange part 425 has comprised the ridgeline of the uneven | corrugated shape to it being formed like this.

  The side vehicle-body structure of the automobile 1 having the above-described configuration is such that the load transfer efficiency in the vicinity of the center pillar 3 is obtained even when the first plate mounting bracket 13 for mounting the scuff plate 12 is provided on the side sill 4. It is possible to suppress the decrease.

  Specifically, in the vicinity of the center pillar 3, the outer edge of the inner upper surface portion 424 and the inner edge of the outer upper surface portion 414 are located at substantially the same position in the vertical direction of the vehicle. When a side collision load is applied in the vicinity of the center pillar 3, the side collision load can be efficiently transmitted from the side sill outer panel 41 to the side sill inner panel 42.

  For this reason, even when the first plate mounting bracket 13 is provided on the inner upper surface portion 424 forward of the center pillar 3 in the vehicle, the side vehicle body structure of the automobile 1 has the side collision load in the vicinity of the center pillar 3. It can suppress that load transmission efficiency falls.

  Furthermore, since the side vehicle-body structure of the automobile 1 can ensure a large vertical cross-sectional area in the vicinity of the center pillar 3, the rigidity of the side sill 4 in the vicinity of the center pillar 3 can be improved. Therefore, the side vehicle body structure of the automobile 1 can suppress a decrease in load transfer efficiency with respect to a front collision load which is a collision load from the front of the vehicle or a rear collision load which is a collision load from the rear of the vehicle.

  Therefore, even if the first plate mounting bracket 13 for mounting the scuff plate 12 is provided on the side sill 4, the side vehicle body structure of the automobile 1 suppresses the decrease in the load transfer efficiency in the vicinity of the center pillar 3. be able to.

  Further, by providing the first recessed portion 427 recessed toward the lower side of the vehicle on the inner upper surface portion 424 opposed to the first plate mounting bracket 13 in the lower side of the vehicle, the side vehicle body structure of the automobile 1 A desired gap can be easily secured between the clip 12a of the scuff plate 12 and the inner top surface 424 of the side sill inner panel 42.

  Therefore, in the side vehicle body structure of the automobile 1, the inner upper surface portion 424 other than the first recessed portion 427, that is, the outer edge of the flat plate portion 426 can be closer to the inner edge of the outer upper surface portion 414. The length in the longitudinal direction of the vehicle can be secured long.

  Thus, the side vehicle-body structure of the automobile 1 can suppress a reduction in load transfer efficiency from the side sill outer panel 41 to the side sill inner panel 42 when a side collision load is applied in the vicinity of the first cross member 8.

  In addition, since the side car body structure of the automobile 1 can secure a large cross sectional area of the side sill 4 in the longitudinal cross section along the vehicle width direction by the first recessed portion 427, the side sill 4 against the frontal crash load or the rear crash load The rigidity can be further improved.

  Therefore, in the side vehicle body structure of the automobile 1, the load transfer efficiency in the vicinity of the center pillar 3 is reduced by the first recessed portion 427 provided in the inner upper surface portion 424 and the load transfer efficiency in the vicinity of the first cross member 8 Can be suppressed in a compatible manner.

  Further, the inner upper surface portion 424 is formed in a shape having an inner edge extending substantially horizontally in the vehicle longitudinal direction in a side view, and the first raised portion 428, the second raised portion 429, and the third raised portion in the inner upper surface portion 424. By positioning the top of the portion 430 and the fourth raised portion 431 at substantially the same position in the vehicle vertical direction as the inner edge of the outer upper surface portion 414 in the longitudinal cross section along the vehicle width direction, the side portion of the automobile 1 Since the vehicle body structure can support the center pillar 3 from the inside in the vehicle width direction at a higher position in the vehicle vertical direction, it is possible to improve the support rigidity of the center pillar 3 against a side collision load.

  Therefore, the side vehicle body structure of the automobile 1 can suppress a decrease in load transfer efficiency in the vicinity of the center pillar 3 and can suppress the falling of the center pillar 3 at the time of a side collision.

  Further, by providing the front reinforcing member 15 joined to the inner upper surface portion 424 and the inner side surface portion 423 inside the side sill 4, the side vehicle body structure of the automobile 1 can be obtained by the first cross member from the vicinity of the center pillar 3. The rigidity of the side sill inner panel 42 can be further improved in the range of the vehicle front-rear direction up to eight.

  As a result, the side vehicle body structure of the automobile 1 has load transfer efficiency in the range of the vehicle longitudinal direction in which the inner edge of the outer upper surface portion 414 and the outer edge of the inner upper surface portion 424 do not substantially match It can be improved. Therefore, the side vehicle body structure of the automobile 1 can reliably transmit the side impact load applied to the side sill inner panel 42 from one side in the vehicle width direction toward the other side in the vehicle width direction.

  Next, the side car body structure of the car 1 in which the shape of the side sill inner panel 42 of the side sill 4 and the shape of the first seat mounting bracket 21 are different from the side car body structure of the car 1 in Embodiment 1 described above is implemented Example 2 will be described in detail with reference to FIGS. 8 to 12.

8 shows the external appearance perspective view of the principal part of the side sill 4 in Example 2, FIG. 9 shows the principal part top view of the side sill 4 in Example 2, FIG. 10: in the EE arrow in FIG. FIG. 11 shows a side view, FIG. 11 shows a sectional view taken along the line F-F in FIG. 9, and FIG. 12 shows a sectional view taken along the line G-G in FIG.
The same components as those of the first embodiment are designated by the same reference numerals and their detailed description will be omitted.

First, the side sill inner panel 42 of the side sill 4 has the inner lower flange portion 421, the inner lower surface portion 422, the inner side surface portion 423, the inner upper surface portion 424, and the inner upper flange portion as in the first embodiment described above. It is integrally formed with 425.
And while the inner side surface part 423 of the side sill inner panel 42 in Example 2 is formed in the substantially flat form of Example 1, it is formed in the stepped shape offset in the vehicle width direction.

  More specifically, as shown in FIGS. 8 to 12, the inner side surface portion 423 has a lower portion 423a which is a lower portion of the vehicle to which the floor panel 6 is joined, and an upper end located outward in the vehicle width direction with respect to the lower end. An inclined portion 423b inclined as described above and an upper portion 423c positioned inward in the vehicle width direction than the lower portion 423a are integrally formed in a stepped shape disposed in this order from the lower side of the vehicle.

  The inner side surface portion 423, as shown in FIG. 10, is formed so that the upper end of the lower portion 423a extends from the vehicle front to the fourth raised portion 431 in a substantially linear shape in the side view. The upper end of the lower portion 423a is formed so as to gradually move downward from the vicinity of the front end of the raised portion 431 toward the rear of the vehicle. The inner side surface portion 423 is formed in a substantially flat plate shape in which the upper portion 423c is joined to the lower portion 423a at the rear of the vehicle than the fourth raised portion 431.

  Lower portion 423a, as shown in FIGS. 11 and 12, in the vertical cross section along the vehicle width direction, is directed from the inner edge of the inner lower surface 422 to the upper side of the vehicle and slightly outward in the vehicle width direction. It is extended. The lower portion 423a is extended to a position slightly above the vehicle than the step-down portion 214c of the first seat mounting bracket 21 in the vehicle vertical direction, as shown in FIG.

As shown in FIGS. 11 and 12, the inclined portion 423b extends from the upper end of the lower portion 423a to the upper side of the vehicle and to the outer side in the vehicle width direction in the vertical cross section along the vehicle width direction.
As shown in FIGS. 11 and 12, upper portion 423c extends from the upper end of inclined portion 423b toward the upper side of the vehicle and slightly outward in the vehicle width direction, and the upper end is the inner side in the vehicle width direction at inner top surface portion 424. Connected to the edge of the

  As shown in FIGS. 8 to 12, in the side sill inner panel 42 having such a configuration, as shown in FIGS. 8 to 12, the floor panel 6, the front reinforcing member 15, the rear reinforcing member (not shown), and The first cross member 8 and the first seat mounting bracket 21 are joined.

  As shown in FIGS. 8 and 11, the front reinforcing member 15 and the rear reinforcing member have a substantially L-shaped cross section along the vehicle width direction, as in the first embodiment, and the inner upper surface portion And 424 and the upper portion 423 c of the inner side surface portion 423.

  Further, as shown in FIGS. 8 to 11, in the first cross member 8, the upper joint portion 84 of the member upper surface portion 81 is joined to the front reinforcing member 15 via the inner upper surface portion 424. Furthermore, in the first cross member 8, the front joint portion 85 of the member front face portion 82 and the rear joint portion 86 of the member rear face portion 83 are joined to the front reinforcing member 15 via the upper portion 423c of the inner side face portion 423. ing.

Further, the first sheet mounting bracket 21 is different from the first sheet mounting bracket 21 of the first embodiment in the shapes of the flange portion and the bead of the step-down portion 214c.
Specifically, as shown in FIGS. 8 to 10, the first seat mounting bracket 21 includes the front wall portion 211, the rear wall portion 212, the side wall portion 213, the upper surface portion 214, and the front wall portion 211. It is integrally formed of a front flange portion 216 extending forward from the vehicle width direction outer edge and a rear flange portion 217 extending rearward from the vehicle width direction outer edge of the rear wall portion 212. .

  Furthermore, as shown in FIGS. 9, 10 and 12, the upper surface portion 214 extends outward in the vehicle width direction from the lower end of the mounting portion 214a, the inclined portion 214b, and the inclined portion 214b as in the first embodiment. It is integrally formed with the provided step-down portion 214c. The outer end of the step-down portion 214c in the vehicle width direction is slightly folded toward the upper side of the vehicle along the lower portion 423a of the side sill inner panel 42.

  In addition, in the step-down portion 214c, as shown in FIG. 10, in a side view, along the imaginary line from the central flange portion 93 of the second cross member 9 to the second raised portion 427 of the side sill inner panel 42. A bead 214e is provided protruding substantially in the upper direction of the vehicle.

  As shown in FIGS. 9 and 12, the bead 214e has a shorter length in the longitudinal direction of the vehicle from the inclined portion 214b toward the outer side in the vehicle width direction, and a length in the vertical direction of the vehicle from the step-down portion 214c It is formed in a substantially triangular pyramid shape to be short.

  As shown in FIG. 12, the bead 214e is formed such that the apex on the outer side in the vehicle width direction substantially coincides with the edge on the outer side in the vehicle width direction of the step-down portion 214c in a longitudinal cross section along the vehicle width direction. It is done. In other words, the bead 214e is formed in a substantially triangular shape in a front view having a ridge line extending from the upper end of the inclined portion 214b to the outer end in the vehicle width direction in the step-down portion 214c in the vehicle front view.

  In the first seat mounting bracket 21 having such a configuration, as shown in FIG. 10, the front flange portion 216 is joined to the lower portion 423a of the inner side surface portion 423, and the rear flange portion 217 is the lower portion 423a of the inner side surface portion 423. Bonded to.

  As in the first embodiment described above, the side vehicle body structure of the automobile 1 having the above-described configuration is the case where the first plate mounting bracket 13 for mounting the scuff plate 12 is provided on the side sill 4 as well. A decrease in load transfer efficiency in the vicinity of the pillar 3 can be suppressed.

  Further, the inner side surface portion 423 of the side sill inner panel 42 includes the lower portion 423a and the upper portion 423c offset to the upper side and the outer side in the vehicle width direction with respect to the lower portion 423a, and the member upper surface of the first cross member 8 The portion 81 is joined to the front reinforcing member 15 via the inner upper surface portion 424, and the member front surface portion 82 of the first cross member 8 and the member rear surface portion 83 are reinforced on the front side via the upper portion 423c of the inner side surface portion 423. By being joined to the member 15, the side vehicle-body structure of the automobile 1 can achieve both the weight reduction of the side sill 4 and the suppression of the decrease in the load transfer efficiency with respect to the side collision load.

  Specifically, since the inner side surface portion 423 of the side sill inner panel 42 is configured by the lower portion 423 a and the upper portion 423 c offset in the vehicle width direction, the side vehicle body structure of the automobile 1 is substantially flat. Compared to the weight of the side sill 4 having the inner side surface portion 423, the weight of the side sill 4 can be reduced.

Furthermore, since the member upper surface portion 81, the member front surface portion 82, and the member rear surface portion 83 of the first cross member 8 are joined to the front side reinforcing member 15, the side vehicle body structure of the automobile 1 The bonding strength with the side sill inner panel 42 can be further improved.
Thus, the side vehicle body structure of the automobile 1 causes a side collision in the vicinity of the first cross member 8 in which the inner edge of the outer upper surface portion 414 and the outer edge of the inner upper surface portion 424 do not substantially coincide at the vehicle vertical position. Load transfer efficiency with respect to load can be further improved.

Therefore, the side vehicle body structure of the automobile 1 more reliably transmits the side impact load applied to the side sill inner panel 42 from one side in the vehicle width direction toward the other side in the vehicle width direction via the first cross member 8 can do.
Therefore, the side vehicle body structure of the automobile 1 can achieve both the weight reduction of the side sill 4 and the suppression of the decrease in the load transfer efficiency with respect to the side collision load.

In correspondence with the configuration of the present invention and the above-described embodiment,
The cross member of the present invention corresponds to the first cross member 8 of the embodiment,
And so on
The plate mounting bracket corresponds to the first plate mounting bracket 13
The recessed portion corresponds to the first recessed portion 427,
The ridges correspond to the first ridge 428, the second ridge 429, the third ridge 430, and the fourth ridge 431,
The reinforcement member corresponds to the front side reinforcement member 15, but
The present invention is not limited to the configuration of the above-described embodiment, and many embodiments can be obtained.

For example, in the embodiment described above, the floor panel 6 having the tunnel portion 6a at the approximate center in the vehicle width direction is used, but the present invention is not limited to this, and a floor panel without the tunnel portion may be used.
In addition, although the second cross member 9 having a substantially M-shaped cross section along the longitudinal direction of the vehicle is described, the present invention is not limited to this. May be a second cross member in the shape of a circle.

  Further, although the second cross member 9 is connected to the side sill 4 through the first seat mounting bracket 21, the present invention is not limited to this, and the second cross member 9 is directly joined to the side sill 4. It may be

  In addition, although the side sill 4 including the front side reinforcing member 15 and the rear side reinforcing member 16 in the inside is not limited thereto, as shown in FIG. 13 showing an external perspective view of the internal configuration of the side sill 4 in another embodiment. In addition to the front reinforcing member 15 and the rear reinforcing member 16, a first joint member 23 is provided to divide an internal space formed by the center pillar inner panel 33 and the side sill inner panel 42 at a predetermined interval in the vehicle longitudinal direction. The second section 24, the third section 25 and the fourth section 26 may be provided as the side sill 4.

  More specifically, as shown in FIG. 13, the first node member 23 is disposed at substantially the same position in the vehicle front-rear direction as the first raised portion 426 of the side sill inner panel 42, and It is joined to the central beveled portion 428a of the ridge 426.

  The second joint member 24 is disposed at substantially the same position in the vehicle longitudinal direction as the front end of the second cross member 9, as shown in FIG. The second node member 24 is joined to the flange portion 215 of the first seat mounting bracket 21 via the inner side surface portion 423 and is joined to the flat plate portion 426 of the inner top surface portion 424.

  The third joint member 25 is disposed between the second raised portion 427 and the third raised portion 428 of the side sill inner panel 42, as shown in FIG. The third joint member 25 is joined to the flange portion 215 of the first seat mounting bracket 21 via the inner side surface portion 423 and is formed on the flat plate portion 426 between the second raised portion 427 and the third raised portion 428. It is joined.

  The fourth joint member 26 is disposed at substantially the same position in the vehicle front-rear direction as the fourth raised portion 429 of the side sill inner panel 42 as shown in FIG. 13 and includes the inner side surface portion 423 and the fourth raised portion 429. It is joined to the central inclined portion 431a.

  By providing such a node member inside the side sill 4, the side vehicle body structure of the automobile 1 is center center even when the first plate mounting bracket 13 for mounting the scuff plate 12 is provided on the side sill 4. A reduction in load transfer efficiency in the vicinity of the pillar 3 can be further suppressed.

  Further, in the vertical cross section along the vehicle width direction through the center pillar 3, the first raised portion 428, the second raised portion 429, and the third raised portion are at substantially the same position in the vehicle vertical direction as the inner edge of the outer upper surface portion 414. Although the tops of the portions 430 and the fourth raised portions 431 are located, the shape is not limited to this, and the outer edge is located at the same position in the vehicle vertical direction as the inner edge of the outer upper surface 414 If it has, it is good also as an appropriate shape.

  For example, the range from the first protrusion 428 to the fourth protrusion 431 is integrally raised, and the top thereof is formed at a position substantially at the same position in the vehicle vertical direction as the inner edge of the outer upper surface portion 414 It may be a single ridge.

  Alternatively, as shown in FIG. 14 showing a side view of the side sill 4 in another embodiment, a substantially flat plate portion having an outer edge extending substantially linearly from the first cross member 8 to the center pillar 3 in a side view The inner upper surface portion 435 may be formed of In this case, the front side reinforcing member 15 and the rear side reinforcing member 16 are formed in a sectional shape in accordance with the sectional shape of the side sill 4.

  More specifically, in the vertical cross section along the vehicle width direction through the first cross member 8, the inner upper surface portion 435 has an outer upper surface as shown in FIG. It extends from the upper end of the inner side surface portion 423 to the inner edge of the outer upper surface portion 414 so that the outer edge is located at a position below the inner edge of the portion 414 with respect to the vehicle.

  On the other hand, in the vertical cross section along the vehicle width direction through the center pillar 3, the inner upper surface portion 435 is an inner side of the outer upper surface portion 414 as shown in FIG. 15 (b) showing an I-I arrow cross section in FIG. The upper end of the inner side surface portion 423 extends from the upper end of the inner side surface portion 423 toward the inner edge of the outer upper surface portion 414 so that the outer edge is located at substantially the same position in the vehicle vertical direction as the edge.

  The longitudinal cross-sectional shape along the vehicle width direction passing through the first cross member 8 and the longitudinal cross-sectional shape along the vehicle width direction passing through the center pillar 3 are smoothly connected in the vehicle longitudinal direction to form a substantially flat plate The inner upper surface portion 435 of the

  Thereby, the side vehicle body structure of the automobile 1 has, for example, a frontal collision load or a rear collision load as compared with the inner upper surface portion 424 having a recess in the vehicle vertical direction and an uneven outer edge formed by a ridge. Can be efficiently transmitted.

  Therefore, in the side vehicle body structure of the automobile 1, even when the first plate mounting bracket 13 for mounting the scuff plate 12 is provided on the side sill 4, the load transfer efficiency in the vicinity of the center pillar 3 is reduced. It can be suppressed.

DESCRIPTION OF SYMBOLS 1 ... Automobile 3 ... Center pillar 4 ... Side sill 8 ... 1st cross member 12 ... Scuff plate 13 ... 1st plate attachment bracket 15 ... Front side reinforcement member 41 ... Side sill outer panel 42 ... Side sill inner panel 81 ... Member top part 82 ... Member front part 83 member rear surface portion 414 outer upper surface portion 423 inner side surface portion 423a lower portion 423c upper portion 424 inner surface upper surface portion 427 first recessed portion 428 first raised portion 429 second raised portion 430 second number 3 ridges 431 ... 4th ridges 435 ... top of inner part

Claims (6)

A pair of left and right side sills extending in the longitudinal direction of the vehicle;
A lower end is joined to the side sill, and a pair of left and right center pillars extending substantially above the vehicle,
A side vehicle body structure of an automobile, comprising: a cross member connecting left and right side sills forward of the vehicle with respect to the center pillar;
The side sill is
A side sill outer panel having a substantially hat-shaped cross section protruding outward in the vehicle width direction;
The side sill outer panel is located inward in the vehicle width direction with respect to the side sill outer panel, and is configured by a side sill inner panel having a substantially hat-shaped cross section projecting inward in the vehicle width direction,
The upper surface portion of the side sill outer panel is an outer upper surface portion, and the upper surface portion of the side sill inner panel is an inner upper surface portion.
In the outer upper surface portion and the inner upper surface portion, the outer edge in the vehicle width direction is an outer edge, and the inner edge in the vehicle width direction is an inner edge.
In the upper surface of the inner
A plate mounting bracket to which the scuff plate is attached is joined at substantially the same position in the vehicle longitudinal direction as the cross member, and a member upper surface portion which is an upper surface portion of the cross member is joined.
The cross-sectional shape of the inner upper surface portion in the longitudinal cross section along the vehicle width direction is
In the longitudinal cross section through the cross member, the outer edge is located at a position lower than the inner edge of the outer upper surface in the vehicle, and in the vertical cross section through the center pillar, the outer upper surface A side vehicle body structure of an automobile formed in a cross-sectional shape in which an outer edge is located at a position substantially in the same vertical direction of the vehicle as an inner edge of the part. 2. The vehicle side vehicle body structure according to claim 1, further comprising a recessed portion recessed toward the lower side of the vehicle on the upper surface portion of the inner facing the lower side of the vehicle with respect to the plate mounting bracket. The inner upper surface portion is
In side view, it is formed in a shape having an inner edge extending substantially horizontally in the longitudinal direction of the vehicle,
In the upper surface of the inner
With a raised ridge directed upwards of the vehicle,
The top of the ridge is
The side of the vehicle according to claim 1 or claim 2, wherein the side of the vehicle according to claim 1 or 2, which is located at a substantially same position in the vehicle vertical direction as the inner edge of the outer upper surface portion in the vertical cross section along the vehicle width direction Department car body structure. The inner upper surface portion is
2. The vehicle side body structure according to claim 1, wherein the side body structure is substantially flat and has an outer edge extending substantially linearly from the cross member to the center pillar in a side view. In the side sill inner panel, a portion extending downward of the vehicle from the inner edge of the inner upper surface portion is used as an inner side surface portion.
Inside the side sill,
The reinforcement member joined to the said inner upper surface part of the said side sill inner panel, and the said inner side part while having the length of the vehicle front-back direction which extends from the said center pillar vicinity to the at least said cross member is provided. The side vehicle body structure of the motor vehicle as described in any one of claim | item 4. The inner side portion of the side sill inner panel is
A lower portion which is a portion on the lower side of the vehicle
And an upper portion disposed at a position offset to the upper side of the vehicle relative to the lower portion and to the outer side in the vehicle width direction
The cross member is
A member front surface portion extending substantially downward from the front edge of the front side of the upper surface of the member;
A member rear surface portion extending substantially downward from a vehicle rear side edge of the member upper surface portion;
The reinforcing member is
It is joined to the inner upper surface portion and the upper portion of the inner side surface portion,
The upper surface of the cross member member is:
It is joined to the reinforcing member via the inner upper surface portion,
The member front portion and the member rear portion of the cross member are:
The vehicle body side vehicle body structure according to claim 5, joined to the reinforcing member via the upper portion of the inner side surface portion.

Images