JP2018069921A - Vehicle lower part structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a vehicle lower part structure where the entry of foreign objects from an open cross-section part to a closed cross-section part of a frame is inhibited and foreign objects in the cross-section of the open cross section part of the frame are effectively discharged therefrom.SOLUTION: A vehicle lower part structure S10 includes a side rail 14 extending in a vehicle longitudinal direction and including a closed cross-section part 24 formed at one side in the vehicle longitudinal direction by coupling of an inner panel 22 and an outer panel 20 and an open cross-section part 26 formed at the other side in the vehicle longitudinal direction by an opening of the inner panel 22 in a vehicle width direction, a flange portion 20D provided at the open cross-section part 26 of the side rail 14 and extending upward from a lower portion of the opening in the vehicle width direction, a cover 30 provided at the boundary between the closed cross-section part 24 and the open cross-section part 26 of the side rail 14 and configured to prevent the entry of foreign objects from the open cross-section part 26 toward the closed cross-section part 24, a first guide portion 32BA formed at the cover 30 and inclined such that the opening of the open cross-section part 26 in the vehicle width direction is located at the lower side in a vehicle vertical direction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle lower structure.

  Patent Document 1 below discloses a frame vehicle that extends in the vehicle longitudinal direction and forms a frame (chassis frame) by joining an outer panel and an inner panel having a substantially U-shaped cross section. In this structure, the cross section of the frame includes a closed cross section on the front side in the vehicle front-rear direction and an open cross section on the rear side in the vehicle front-rear direction. In addition, there exists a thing described in patent document 2 as a structure which discharges water outside a vehicle by the guide member provided in the upper surface of the rocker. In addition, as a structure in which a lid member is provided on a closed cross section of the rear portion of the frame in order to prevent water from entering at a joint portion with the bumper reinforcement at the rear portion of the frame, there is one described in Patent Document 3.

JP 2002-012164 A JP 2003-327166 A JP 05-338508 A

  In the structure described in Patent Document 1, water and mud easily enter the closed cross section side through the inside of the frame from the open cross section side behind the vehicle. Further, in order to improve the rigidity of the cross section of the frame, for example, if a flange extending in the vehicle vertical direction is provided at the end of the substantially U-shaped panel, water easily collects on the inside of the flange, and the above-described problem becomes more prominent. become.

  In consideration of the above-described facts, the present invention suppresses entry of foreign matter from the open cross-sectional portion of the frame into the closed cross-sectional portion, and efficiently discharges foreign matter from the cross-section of the open cross-sectional portion of the frame. Is the purpose.

  The vehicle lower structure according to the invention of claim 1 extends in the vehicle front-rear direction, and the inner panel and the outer panel are joined to at least a part of one side in the vehicle front-rear direction to form a closed cross-section portion, Provided on at least a part of the other side in the vehicle longitudinal direction is a side rail in which one of the inner panel and the outer panel is open in the vehicle width direction, and is provided in the open cross section of the side rail. The opening side in the vehicle width direction is provided at the boundary between the flange portion extending upward from the lower portion in the vehicle vertical direction and the closed cross-section portion and the open cross-section portion of the side rail, and from the open cross-section portion side A cover that suppresses intrusion of foreign matter to the side of the closed cross section and an opening formed in the cover in the vehicle width direction of the open cross section so as to be positioned on the lower side in the vehicle vertical direction It has a guide portion for the.

  According to the first aspect of the present invention, the side rail has a closed cross section formed by joining the inner panel and the outer panel to at least a part of one side in the vehicle front-rear direction, and the other in the vehicle front-rear direction. At least part of the side is formed with an open cross-sectional portion in which one of the inner panel and the outer panel opens in the vehicle width direction. The open cross-section portion of the side rail is provided with a flange portion whose opening side in the vehicle width direction extends upward from the lower portion in the vehicle vertical direction. In addition, a cover is provided at the boundary between the closed cross-section portion and the open cross-section portion of the side rail, and foreign matter (water, sand, mud, dirt) from the open cross-section portion side to the closed cross-section portion side by the cover. Etc.) is suppressed. Further, the cover is formed with a guide portion that is inclined so that the opening side in the vehicle width direction of the open section is positioned on the lower side in the vehicle vertical direction. For this reason, even if foreign matter enters the cross section of the open cross section, the foreign matter is likely to be discharged to the outside from the opening side in the vehicle width direction along the inclination of the guide portion.

  According to the vehicle lower structure according to the present invention, foreign matter can be prevented from entering from the open cross-section portion of the frame to the closed cross-section portion, and foreign matters can be efficiently discharged from the cross-section of the open cross-section portion of the frame.

It is a perspective view showing the vehicle lower part structure concerning one embodiment in the state seen from the vehicles back side. It is a rear view which shows the vehicle lower part structure which concerns on one Embodiment. It is a perspective view which shows the cover used for the vehicle lower part structure which concerns on one Embodiment. It is a perspective view which shows the vehicle lower part structure concerning a comparative example in the state seen from the vehicle rear side.

  Hereinafter, an embodiment of a vehicle lower structure according to the present invention will be described with reference to FIGS. In these drawings, an arrow FR appropriately shown indicates the vehicle front side, an arrow UP indicates the vehicle upper side, and an arrow IN indicates the vehicle width direction inner side. Also, in the following description, when using front / rear, up / down, left / right directions, unless otherwise specified, front / rear in the vehicle front / rear direction, up / down in the vehicle up / down direction, left / right in the vehicle left / right direction (vehicle width direction) It shall be shown.

  FIG. 1 is a perspective view of a lower portion 13 of a vehicle (vehicle with a frame) 12 to which a vehicle lower structure S10 according to the present embodiment is applied as viewed from the vehicle rear side. FIG. 2 shows a rear view of a lower portion 13 of a vehicle (vehicle with a frame) 12 to which the vehicle lower structure S10 is applied. As shown in FIGS. 1 and 2, a side rail 14 that extends in the vehicle front-rear direction is provided at the lower portion 13 of the vehicle 12. Although not shown, the side rails 14 are arranged on the outer side in the width direction of the lower portion 13 of the vehicle 12 so as to form a pair of left and right sides, and a plurality of cross members are arranged between the pair of left and right side rails 14. It is stretched across the width.

  The side rail 14 includes an outer panel 20 that forms an outer portion in the vehicle width direction, and an inner panel 22 that is disposed on the inner side in the vehicle width direction from the outer panel 20 and forms an inner portion in the vehicle width direction. The outer panel 20 is disposed on the outer side portion of the side rail 14 in the vehicle width direction along the vehicle front-rear direction. As shown in FIG. 1, the inner panel 22 is at least a part in the vehicle front-rear direction of the inner side portion of the side rail 14 in the vehicle width direction (in this embodiment, the front side of the side rail 14 in FIG. 1 in the vehicle front-rear direction). Is arranged. The outer panel 20 and the inner panel 22 are made of steel.

  As shown in FIG. 1, a closed cross section 24 is formed on the side rail 14 by joining an inner panel 22 and an outer panel 20 to the front side in the vehicle longitudinal direction. Further, the side rail 14 is formed with an open cross-section portion 26 in which the inner side in the vehicle width direction (that is, the inner panel 22 side) opens in the vehicle width direction on the rear side in the vehicle front-rear direction. In other words, in the open section 26 of the side rail 14, only the outer panel 20 is disposed, and the inner panel 22 is not disposed. In the present embodiment, the side rail 14 is formed with a closed cross-sectional portion 24 on at least part of the front side as one side in the vehicle longitudinal direction, and at least part of the rear side as the other side in the vehicle longitudinal direction. An open cross-sectional portion 26 is formed.

  As shown in FIG. 1 and FIG. 2, the outer panel 20 is formed in a substantially U shape whose cross-sectional shape when cut along the vehicle width direction opens to the inside in the vehicle width direction. More specifically, the outer panel 20 includes a vertical wall portion 20A disposed along the vehicle vertical direction on the outer side in the vehicle width direction, and an upper wall portion extending substantially inward in the vehicle width direction from the upper end portion of the vertical wall portion 20A. 20B and a lower wall portion 20C extending substantially inward in the vehicle width direction from the lower end portion of the vertical wall portion 20A. Further, the outer panel 20 includes a flange portion 20D extending from the vehicle width direction inner side end portion of the lower wall portion 20C as the lower portion to the upper side in the vehicle vertical direction, and the vehicle width direction inner end portion of the upper wall portion 20B from the vehicle vertical direction. And a flange portion 20E extending downward.

  The inner panel 22 is formed in a substantially U shape whose cross-sectional shape when cut along the vehicle width direction opens to the outside in the vehicle width direction. More specifically, the inner panel 22 includes a vertical wall portion 22A disposed on the inner side in the vehicle width direction along the substantially vertical direction of the vehicle, and an upper wall extending substantially outward in the vehicle width direction from the upper end portion of the vertical wall portion 22A. And a lower wall portion 22C (see FIG. 2) extending substantially outward in the vehicle width direction from the lower end portion of the vertical wall portion 22A.

  The lower wall portion 22C of the inner panel 22 is superimposed on the lower surface of the lower wall portion 20C of the outer panel 20, and the lower wall portion 22C of the inner panel 22 and the lower wall portion 20C of the outer panel 20 are joined by welding ( (See FIG. 2). Further, the upper wall portion 22B of the inner panel 22 is superimposed on the upper surface of the upper wall portion 20B of the outer panel 20, and the upper wall portion 22B of the inner panel 22 and the upper wall portion 20B of the outer panel 20 are joined by welding. Yes. Thereby, the substantially rectangular closed cross-sectional part 24 is formed in the front side of the vehicle front-back direction of the side rail 14 (refer FIG. 1). In the present embodiment, the inner panel 22 gradually expands in the vehicle width direction toward the front side in the vehicle front-rear direction, but the shape of the inner panel 22 is not limited to this configuration.

  As shown in FIG. 1, the closed cross section 24 of the side rail 14 is formed up to the position of the rear end portion 28 of the inner panel 22 in the vehicle front-rear direction. As described above, the inner panel 22 is not disposed on the rear side in the vehicle front-rear direction of the closed cross-section portion 24 of the side rail 14, and the open cross-section portion 26 is formed. As described above, only the outer panel 20 is arranged in the open section 26, and the inside in the vehicle width direction is an opening. The open section 26 is provided with a flange portion 20D extending upward from the lower wall portion 20C on the opening side of the outer panel 20, and a flange portion 20E extending downward from the upper wall portion 20B on the opening side of the outer panel 20. Is provided.

  A bracket 44 that protrudes outward in the vehicle width direction is provided on the side rail 14 (the front side in the vehicle longitudinal direction in FIG. 1). A cab mount (not shown) is attached to the bracket 44, and a cab (body) (not shown) can be connected to the side rail 14 via the cab mount and the bracket 44.

  As shown in FIG. 1 and FIG. 2, at the boundary between the closed cross section 24 and the open cross section 26 of the side rail 14, the side rail 14 is arranged so as to straddle the cross section of the side rail 14, and at least the closed cross section 24. A fish tail cover (hereinafter referred to as “cover”) 30 is provided as a cover for closing the lower side. In the present embodiment, a gap is formed between the upper portion of the cover 30 and the upper wall portion 20B of the outer panel 20. As shown in FIGS. 1 to 3, the cover 30 is disposed substantially in the vehicle width direction and is formed in a substantially C shape in a vehicle side view, and the vehicle width direction outer side of the wall 30 </ b> A. An outer wall portion 30B extending from the end portion to the vehicle vertical direction and substantially the vehicle rear side; an inner wall portion 30C bent along the inner wall surface of the inner panel 22 from the vehicle width direction inner end portion of the wall portion 30A; It has. Since the cover 30 is provided at the boundary between the closed cross-section portion 24 and the open cross-section portion 26 of the side rail 14, water, sand, mud, garbage, etc. from the open cross-section portion 26 side to the closed cross-section portion 24 side, etc. Intrusion of foreign matter is suppressed.

  The wall portion 30A of the cover 30 is formed in a concave shape in the vehicle front side. More specifically, the wall portion 30A includes a vertical wall portion 32A disposed substantially along the vehicle vertical direction at an intermediate portion in the vehicle vertical direction, and the vehicle rear obliquely lower side and the vehicle from the lower end portion of the vertical wall portion 32A. And a guide portion 32B extending to the rear side. Further, the wall portion 30A includes a lower side wall portion 32C that is disposed on the outer side in the vehicle width direction of the flange portion 20D and extends substantially obliquely rearward and downward from the rear end portion of the guide portion 32B (see FIG. 1). . Furthermore, the wall portion 30A includes an upper side wall portion 32D extending from the upper end portion of the vertical wall portion 32A substantially obliquely upward to the rear of the vehicle.

  In the present embodiment, the guide portion 32B extends from the lower end portion of the vertical wall portion 32A substantially obliquely downward to the rear of the vehicle, and extends substantially rearward from the rear end portion of the first guide portion 32BA. And a second guide portion 32BB. In the first guide portion 32BA, the vehicle width direction inner side (the opening side in the vehicle width direction of the open cross-section portion 26) is positioned below the vehicle width direction outer side in the vehicle vertical direction in a cross section substantially along the vehicle width direction. The inclined surface is inclined so as to be. For example, the inclined surface on the upper side of the first guide portion 32BA has an angle θ with respect to the virtual plane in the horizontal direction, and is arranged so as to descend downward in the vehicle width direction (see FIG. 2). As a result, foreign matters such as water, sand, mud, and dust flow through the first guide portion 32BA to the inside in the vehicle width direction, and are discharged from the opening side to the outside.

  The vehicle width direction outer side part of 2nd guide part 32BB is arrange | positioned substantially horizontally along the vehicle width direction. In addition, a curved surface that curves toward the vehicle lower side is formed at the inner end of the second guide portion 32BB in the vehicle width direction. Thereby, foreign matters such as water, sand, mud, and dust are discharged to the outside through the curved surface of the inner end portion (opening side) of the second guide portion 32BB in the vehicle width direction.

  The lower side wall portion 32C of the cover 30 is formed to have a downward slope from the rear end portion of the second guide portion 32BB toward the vehicle rear side. The rear end portion (lower end portion) of the lower wall portion 32C is in contact with the lower wall portion 20C of the outer panel 20 via a seal member 36 (see FIG. 2) described later. Further, a flange portion 20D is inserted between the lower wall portion 32C and the inner wall portion 30C of the cover 30 via a seal member 36 (see FIG. 2). The lower side wall portion 32C of the cover 30 is configured to push up foreign matters such as water, sand, mud, and dust flowing from the side of the open cross section 26 in the side rail 14 (rear side of the vehicle) to the guide portion 32B (see FIG. (See arrow B in 1). The guide portion 32B is disposed closer to the closed cross-section portion 24 than the lower side wall portion 32C, and foreign matter flows inward in the vehicle width direction through the first guide portion 32BA of the guide portion 32B. It is discharged to the outside (see arrow B in FIG. 1).

  The outer wall portion 30B of the cover 30 is formed continuously with an upper wall portion 32D, a vertical wall portion 32A, a guide portion 32B (first guide portion 32BA and second guide portion 32BB), and a lower wall portion 32C. ing. The outer side wall portion 30 </ b> B is disposed along the vertical wall portion 20 </ b> A of the outer panel 20. A seal member 36 is disposed between the cover 30 and the outer panel 20 (see FIG. 2). More specifically, the seal member 36 includes the lower part of the outer wall part 30B, the lower wall part 32C, and the inner wall part 30C of the cover 30, the vertical wall part 20A, the lower wall part 20C, and the flange part 20D of the outer panel 20. (See FIG. 2). The rear end portion of the seal member 36 is cut along the rear end edges of the outer wall portion 30B and the lower wall portion 32C of the cover 30. The seal member 36 seals between the cover 30 and the lower wall portion 20C, the flange portion 20D, and the vertical wall portion 20A of the outer panel 20, so that foreign matters such as water and mud are covered with the wall surface of the cover 30 and the wall surface of the outer panel 20. Intrusion into the closed cross-section portion 24 side from between is suppressed.

  The inner wall portion 30 </ b> C of the cover 30 is disposed substantially inside the inner panel 22 in the vehicle width direction. The inner wall portion 30C of the cover 30 is formed continuously from the upper wall portion 32D, the vertical wall portion 32A, the guide portion 32B (the first guide portion 32BA and the second guide portion 32BB), and the lower wall portion 32C. ing. When viewed from the vehicle rear side, the inner side wall portion 30 </ b> C has a shape bent stepwise toward the inner side in the vehicle width direction. In other words, the inner side wall portion 30C includes a step portion whose height decreases stepwise when viewed from the rear side of the vehicle (in this embodiment, a step portion whose height decreases in one step). A convex portion 34A extending in a convex shape toward the front side of the vehicle is provided at an intermediate portion of the inner wall portion 30C in the vehicle vertical direction, and a through hole 40 (FIG. 3) through which a bolt 38 is inserted into the convex portion 34A. Reference) is formed.

  Although illustration is omitted, the rear end portion 28 of the vertical wall portion 22A of the inner panel 22 has a shape that is cut out in a concave shape on the front side in the vehicle front-rear direction along the shape of the wall portion 30A of the cover 30. The wall portion 30 </ b> A of the cover 30 is disposed in the cross section of the side rail 14 on the vehicle rear side of the vertical wall portion 22 </ b> A of the inner panel 22. Further, the outer wall portion 30B of the cover 30 is overlapped with the inner surface of the vertical wall portion 20A of the outer panel 20 via the seal member 36, and the inner wall portion 30C of the cover 30 is overlapped with the vertical wall portion 22A of the inner panel 22. Has been. In this state, the bolt 38 is inserted into the through hole 40 (see FIG. 3) from the inner wall portion 30C side, and is screwed into a weld nut (not shown) from the vertical wall portion 22A side of the inner panel 22, thereby covering the cover. 30 is fixed to the side rail 14. Further, the seal member 36 may be bonded to the cover 30 by bonding or the like, or the seal member 36 may be bonded to the outer panel 20 by bonding or the like.

  Next, the operation and effect of the vehicle lower structure S10 of the present embodiment will be described.

  As shown in FIGS. 1 and 2, the vehicle lower structure S <b> 10 is provided with side rails 14 extending along the vehicle front-rear direction. A closed cross-section 24 is formed on the side rail 14 by joining the inner panel 22 and the outer panel 20 to at least a part of the front side in the vehicle front-rear direction. Further, the side rail 14 is formed with an open cross-section portion 26 in which the inner side in the vehicle width direction (the inner panel 22 side) opens in the vehicle width direction at least at a part of the rear side in the vehicle front-rear direction. The open cross-section portion 26 of the side rail 14 is formed with a flange portion 20D extending from the vehicle width direction inner side end portion of the lower wall portion 20C upward in the vehicle vertical direction on the inner side (opening side) in the vehicle width direction. Yes. Further, a cover 30 is provided at the boundary between the closed cross section 24 and the open cross section 26 of the side rail 14. In the vehicle lower structure S <b> 10, the cover 30 suppresses entry of foreign matters such as water, sand, mud, and dust from the open section 26 side to the closed section 24 side.

  Further, the cover 30 is formed with a first guide portion 32BA that is inclined so that the opening side in the vehicle width direction (inner side in the vehicle width direction) of the open section 26 is positioned on the lower side in the vehicle vertical direction. As a result, as shown by the arrow A in FIG. 1, the foreign matter that has entered the cross section of the open cross-section portion 26 due to the scattering of foreign matter such as water and mud causes the first guide portion 32BA of the guide portion 32B to be inclined. It is discharged to the outside from the opening side in the vehicle width direction. Further, as shown by an arrow B in FIG. 1, foreign matter such as water and mud from the rear of the vehicle is pushed up along the lower side wall portion 32C when the vehicle 12 is tilted forward or suddenly braked. It moves to the first guide portion 32BA of the guide portion 32B on the vehicle front side. Thereby, the foreign matter is discharged to the outside from the opening side in the vehicle width direction along the inclination of the first guide portion 32BA. For this reason, even if the flow rate of foreign matter increases, the foreign matter is smoothly discharged to the outside along the inclination of the first guide portion 32BA. Also, in the second guide portion 32BB, a curved surface whose height decreases toward the inner side in the vehicle width direction is formed at the inner end portion in the vehicle width direction, so the inner end in the vehicle width direction of the second guide portion 32BB. Foreign matter is easily discharged to the outside from the part.

  Therefore, according to the vehicle lower structure S <b> 10, the cover 30 suppresses intrusion of foreign matter from the open cross-section portion 26 of the side rail 14 to the closed cross-section portion 24, and from within the cross section of the open cross-section portion 26 of the side rail 14. Foreign matter can be efficiently discharged.

  FIG. 4 is a perspective view showing a vehicle lower structure S100 of a comparative example. In the vehicle lower structure S100, side rails 104 extending in the vehicle front-rear direction are provided. The side rail 104 includes an outer panel 110 that forms an outer portion in the vehicle width direction, and an inner panel 112 that is disposed on the inner side in the vehicle width direction from the outer panel 110 and forms an inner portion in the vehicle width direction. The outer panel 110 is disposed on the outer side portion of the side rail 104 in the vehicle width direction along the vehicle front-rear direction. The inner panel 112 is disposed on the front side in the vehicle front-rear direction of the inner portion of the side rail 104 in the vehicle width direction.

  A closed cross section 114 is formed on the side rail 104 by joining the inner panel 112 and the outer panel 110 to the front side in the vehicle front-rear direction. Further, the side rail 104 is formed with an open cross-section portion 116 in which the vehicle width direction inner side (the inner panel 112 side) opens in the vehicle width direction on the rear side in the vehicle front-rear direction. That is, only the outer panel 110 is provided in the open cross section 116 of the side rail 104, and the inner panel 112 is not provided. The outer panel 110 includes a vertical wall portion 20A, an upper wall portion 20B, a lower wall portion 20C, a lower flange portion 20D, and an upper flange portion 20E. The inner panel 112 includes a vertical wall portion 22A, an upper wall portion 22B, and a lower wall portion 22C. At the rear end portion of the vertical wall portion 22A of the inner panel 112, a cutout portion 112A is formed in which an intermediate portion in the vehicle vertical direction is cut out in a concave shape on the vehicle front side.

  Unlike the vehicle lower structure S10 of the present embodiment, the vehicle lower structure S100 is not provided with a cover at the boundary between the closed cross-section portion 114 and the open cross-section portion 116 of the side rail 104.

  In the vehicle lower structure S100 described above, when foreign matter such as water, sand, mud, and dust enters the open cross section 116 of the side rail 104 (in the cross section of the outer panel 110) from the inner side (opening side) in the vehicle width direction, it opens. Foreign matter easily enters the closed cross-section portion 114 from the cross-section portion 116. In particular, since the outer panel 110 is provided with a flange portion 20D extending from the vehicle width direction inner side end portion of the lower wall portion 20C to the vehicle upper side, foreign matter tends to accumulate inside the flange portion 20D of the outer panel 110, and the flange The foreign matter that has entered the portion 20D is less likely to be discharged to the outside.

  On the other hand, in the vehicle lower structure S10 of the present embodiment, a cover 30 is provided at the boundary between the closed cross-section portion 24 and the open cross-section portion 26 of the side rail 14, and the cover 30 causes the open cross-section portion 26 from the side. Invasion of foreign matter to the closed cross-section portion 24 side is suppressed.

  Further, the cover 30 is formed with a first guide portion 32BA that is inclined so that the opening side in the vehicle width direction of the open section 26 is positioned on the lower side in the vehicle vertical direction. As a result, as shown by an arrow A in FIG. 1, the foreign matter that has entered the cross section of the open cross-section portion 26 due to the scattering of foreign matters such as water and mud is transmitted along the inclination of the first guide portion 32BA to the vehicle width. It is discharged to the outside from the opening side of the direction. Further, as shown by an arrow B in FIG. 1, foreign matters such as water and mud from the rear of the vehicle are pushed up along the lower side wall portion 32C when the vehicle 12 is tilted forward or suddenly braked. It moves to the first guide portion 32BA on the front side of the vehicle. Thereby, the foreign matter is discharged to the outside from the opening side in the vehicle width direction along the inclination of the first guide portion 32BA.

  In the above embodiment, the closed cross-section portion 24 is formed on the front side of the side rail 14 in the vehicle front-rear direction, and the open cross-section portion 26 is formed on the rear side of the side rail 14 in the vehicle front-rear direction. Although the cover 30 is provided at the boundary between the closed section 24 and the open section 26, the present invention is not limited to this configuration. For example, a closed cross-section portion is formed on the rear side of the side rail in the vehicle front-rear direction, and an open cross-section portion is formed on the front side of the side rail in the vehicle front-rear direction. The structure in which the cover is provided in the boundary may be sufficient.

  Further, a closed cross section is formed on at least a part of one side of the side rail in the vehicle front-rear direction, and an open cross section is formed on at least a part of the other side of the side rail in the vehicle front-rear direction. The structure in which the cover is provided in the boundary of a cross-section part and an open cross-section part may be sufficient. For example, when an open cross-section portion, a closed cross-section portion, and an open cross-section portion are sequentially arranged from the front side of the side rail in the vehicle longitudinal direction, the boundary between the front open cross-section portion and the closed cross-section portion, and the closed cross-section portion and the rear You may provide a cover in the boundary with the open cross-section part of a side, respectively. Further, for example, when a closed cross-section portion, an open cross-section portion, and a closed cross-section portion are arranged in order from the front side in the vehicle longitudinal direction of the side rail, the boundary between the front closed cross-section portion and the open cross-section portion, and the open cross-section portion A cover may be provided at the boundary between the rear closed cross section and the rear side.

  Moreover, in the said embodiment, although the open cross-section part 26 of the side rail 14 is a shape which the vehicle width direction inner side, ie, the inner panel 22 side, opens, this invention is not limited to this structure. For example, the open cross section of the side rail may have a shape that opens on the outer side in the vehicle width direction, that is, on the outer panel side.

  Further, in the above embodiment, the cover 30 is formed with the first guide portion 32BA that is inclined so that the opening side in the vehicle width direction of the open section 26 is positioned on the lower side in the vehicle vertical direction. The invention is not limited to this configuration. That is, the position and shape of the guide part and the inclination angle of the guide part with respect to the horizontal direction can be changed. Moreover, the structure which has a some inclination part from which an inclination angle differs may be sufficient as a guide part.

  Moreover, in the said embodiment, although the cover 30 is attached to the inner panel 22 of the side rail 14 with the volt | bolt 38 etc., this invention is not limited to this structure, The attachment structure to the side rail of a cover is as follows. It can be changed.

  The embodiments of the present invention have been described with reference to the embodiments. However, these embodiments are merely examples, and various modifications can be made without departing from the scope of the invention. Further, it goes without saying that the scope of rights of the present invention is not limited to these embodiments and can be implemented in various modes without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 12 Vehicle 13 Lower part 14 Side rail 20 Outer panel 20D Flange part 22 Inner panel 24 Closed cross-section part 26 Open cross-section part 30 Cover 32B Guide part 32BA 1st guide part (guide part)
S10 Vehicle lower structure

Claims (1)

The inner panel and the outer panel are joined to at least a part of one side in the vehicle front-rear direction to extend in the vehicle front-rear direction, thereby forming a closed cross-sectional portion, and at least a part of the other side in the vehicle front-rear direction is A side rail on which one of the inner panel and the outer panel is formed with an open cross section that opens in the vehicle width direction;
A flange portion provided on the open cross-section portion of the side rail, the opening side in the vehicle width direction extending upward from the lower portion in the vehicle vertical direction;
A cover that is provided at a boundary between the closed cross-section portion and the open cross-section portion of the side rail, and that suppresses intrusion of foreign matters from the open cross-section portion side to the closed cross-section portion side;
A guide portion that is formed on the cover and is inclined so that an opening side in a vehicle width direction of the open cross-sectional portion is positioned on a lower side in the vehicle vertical direction;
A vehicle lower structure having: