Vehicle load box structure

Abstract

This vehicle luggage box structure comprises a header board constituting a vehicle-front-side wall surface of a vehicle luggage box. The header board is provided with a reinforcing part including a bead part extending in the vertical direction of the vehicle. The reinforcing part has a pair of first portions provided at both vehicle-width-direction ends of the header board, and a second portion provided between the pair of first portions in at least a vehicle-width-direction central section of the header board. The bead part provided on the second portion bulges toward at least one vehicle-longitudinal-direction side to a greater extent than the bead part provided on the first portions.

Description

Technical Field

[0001] The present invention relates to a vehicle cargo box structure.

Background Art

[0002] Conventionally, a vehicle equipped with a loading / unloading means behind a cab in which a passenger rides is known. This type of vehicle includes a header board having a front wall independent of the cab back panel behind the cab, side gates constituting side walls on both left and right sides of the header board, a tail gate constituting a rear wall on the rear side of the side gates, and a floor panel constituting a bottom wall, and is provided with a box-shaped vehicle cargo box.

[0003] For example, Patent Document 1 discloses a vibration damping structure for a header board of a truck bed. In this Patent Document 1, the lower end portion of an upper rail fixed to the upper end portion of the header board is extended downward by a required amount to form a closed space between the header board, to increase rigidity, and a vibration damping weight is provided in the closed space to attenuate the vibration of the header board.

[0004] In addition, Patent Document 2 discloses a cab back panel. The cab back panel of Patent Document 2 is a cab back panel that stands along the vehicle width direction and partitions the rear portion of the cab, and includes a base portion that curves so that the center in the vehicle width direction bulges in one direction of the vehicle front and the vehicle rear, a first bead that is formed by bending from the first regions on both sides in the vehicle width direction of the base portion, protrudes in one direction, and extends in the vertical direction, and a second bead that is formed by bending from the second region in the center in the vehicle width direction of the base portion, protrudes in the other direction of the vehicle front and the vehicle rear, and extends in the vertical direction.

[0005] In addition, Patent Document 3 discloses a vibration damping structure for an automobile back panel. The vibration damping structure of the automobile back panel in Patent Document 3 defines a passenger compartment and a cargo bed. And a step portion is formed in the middle part of the back panel in the vertical direction so that the lower part of the back panel is positioned in front of the vehicle with respect to the upper part in the vehicle width direction, and a plurality of upper vertical beads and lower vertical beads are formed in parallel on the upper part and the lower part of the back panel, respectively, and are formed so as to be divided by the step portion.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0007] In Patent Documents 2 and 3, similar to generally known techniques, techniques for increasing rigidity by providing beads and step portions on flat articles or panels are disclosed, but the improvement in rigidity is insufficient only with the disclosed beads and steps. Therefore, thick reinforcing members are provided, and there has been a major problem from the viewpoint of increasing the vehicle weight.

[0008] The technique disclosed in Patent Document 1 is to increase the rigidity of the header board by enlarging the upper rail and to attenuate the vibration of the header board by providing a vibration damping weight, and an increase in the weight of the cargo box is inevitable.

[0009] The present invention has been made in view of such problems, and an object thereof is to provide a vehicle cargo box structure that can avoid an increase in vehicle weight and effectively increase rigidity.

Means for Solving the Problem

[0010] In order to achieve the above object, the vehicle load box structure according to the present invention has, for example, the following configuration. (1) A vehicle load box structure including a header board that constitutes a wall surface on the vehicle front side in the vehicle load box, a reinforcing portion including a bead portion extending in the vehicle vertical direction is provided on the header board, the reinforcing portion a pair of first portions provided on both end sides in the vehicle width direction of the header board, and a second portion provided at least at a central portion in the vehicle width direction of the header board between the pair of first portions, has, the bead portion provided on the second portion bulges in at least one of the vehicle front-rear direction more than the bead portion provided on the first portion, Vehicle load box structure. (2) The vehicle load box structure according to (1), the bead portion provided on the second portion bulges in front of the vehicle more than the bead portion provided on the first portion, Vehicle load box structure. (3) The vehicle load box structure according to (1) or (2), the bead portion provided on the second portion has a shape including a bent portion where the bulging ridge line bends when viewed from the vehicle width direction, Vehicle load box structure. (4) The vehicle load box structure according to any one of (1) to (3), the length of the bead portion provided on the second portion in the vehicle vertical direction is longer than the length of the bead portion provided on the first portion in the vehicle vertical direction, Vehicle load box structure. (5) The vehicle load box structure according to any one of (1) to (4), the length of the bead portion provided on the second portion in the vehicle vertical direction is substantially the same as the length of the header board in the vehicle vertical direction, Vehicle load box structure. (6) The vehicle load box structure according to any one of (1) to (5), An upper rail is provided along the vehicle width direction at the upper end of the header board. Vehicle load box structure. (7) The vehicle load box structure according to any one of (1) to (6), A reinforcing member is provided along the vehicle width direction at the upper end of the second part. Vehicle load box structure. (8) The vehicle load box structure according to (7), The length of the reinforcing member in the vehicle width direction is configured to be substantially the same as the length of the second part in the vehicle width direction. Vehicle load box structure. (9) The vehicle load box structure according to (7) or (8), An upper rail is provided along the vehicle width direction at the upper end of the header board, The reinforcing member is provided so as to cover the upper end of the second part and the lower end of the upper rail. Vehicle load box structure. (10) The vehicle load box structure according to (9), A guard frame is provided above the upper rail of the vehicle, A plurality of upper and lower crossbars spaced apart from each other in the vehicle width direction are provided on the guard frame, The second part is located between at least a pair of the upper and lower crossbars in the vehicle width direction. Vehicle load box structure. [Advantages of the Invention]

[0011] According to the vehicle load box structure of the present invention, it is possible to provide a vehicle load box structure that can avoid an increase in vehicle weight and effectively enhance rigidity. [Brief Description of the Drawings]

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0013] Hereinafter, the vehicle loading box structure according to an embodiment of the present invention will be described with reference to FIGS. 1 to 8. In the following drawings, the direction viewed from the driver (occupant) of the vehicle is shown. Also, in each figure, the directions of the vehicle front-rear direction, vehicle left-right direction (vehicle width direction), and vehicle up-down direction are indicated by arrows. Further, the type of vehicle to which the vehicle loading box structure of the present embodiment is applied is not particularly limited, and for example, it can be applied to gasoline vehicles, electric vehicles (EVs), hybrid vehicles (HEVs), plug-in hybrid vehicles (PHEVs), etc.

[0014] Figure 1 is a perspective view of the vehicle loading box 1 from the front side of the vehicle. Figure 2 is a front view of the vehicle loading box 1 from the front. Figure 3 is a cross-sectional arrow view of the portion along the line A-A in Figure 2. Figure 4 is a cross-sectional arrow view of the portion along the line B-B in Figure 2. Figure 5 is a cross-sectional arrow view of the portion along the line C-C in Figure 2. Figure 6 is a cross-sectional view of the portion along the line D-D in Figure 2. Figure 7 is an enlarged perspective view of the main part of Figure 1. Figure 8 is a cross-sectional view of the portion along the line E-E in Figure 7.

[0015] As shown in FIG. 1, the vehicle cargo box 1 is arranged behind the cabin of the vehicle. The vehicle cargo box 1 includes a front header board 2, a pair of left and right side gates 3, 3, a rear tail gate 4, and a lower floor panel 5 (see FIG. 7).

[0016] The header board 2 forms the front wall surface of the vehicle cargo box 1 and extends in the left-right direction (vehicle width direction). The pair of side gates 3, 3 are connected to both left and right end portions of the header board 2, extend rearward, and form the left and right side wall surfaces of the vehicle cargo box 1. A wheel arch 3a is formed at the lower end portion of each side gate 3. The tail gate 4 is connected to the rear end portions of the pair of side gates 3, 3 and extends in the left-right direction. The floor panel 5 (see FIG. 7) closes the lower side of the space surrounded by the header board 2, the pair of side gates 3, 3, and the tail gate 4.

[0017] In this way, the vehicle cargo box 1 is a rectangular accommodation space in top view composed of the header board 2, the pair of side gates 3, 3, the tail gate 4, and the floor panel 5.

[0018] As shown in FIGS. 1 and 2, the header board 2 is formed in a substantially T shape when viewed from the front. Specifically, the header board 2 has a main body portion 2a located at the center in the vehicle width direction and extending portions 2b extending from the upper portion of the main body portion 2a to both left and right sides. The vertical dimension and the left-right dimension of the extending portion 2b are smaller than the vertical dimension and the left-right dimension of the main body portion 2a.

[0019] As shown in FIG. 3, an upper rail 30 is fixed to the upper end portion 2c of the header board 2 by welding or the like along the vehicle width direction. The upper rail 30 includes a base portion 30a extending in the vertical direction along the front surface of the header board 2, and an extension portion 30b extending forward from the upper end portion of the base portion 30a. The front end portion of the extension portion 30b is formed in a hook shape bent downward and rearward, and it is possible to fix a hook of a rope or the like for fixing the luggage placed on the vehicle load box 1. By providing the upper rail 30 in this way, the upper end portion 2c of the header board 2 is reinforced.

[0020] A guard frame 50 is fixed above the extension portion 30b of the upper rail 30. As shown in FIGS. 1 and 2, the guard frame 50 includes a lower frame 51, an upper frame 52, and a plurality of vertical bars 53.

[0021] The lower frame 51 extends substantially linearly along the left-right direction on the upper end portion 2c of the header board 2. The upper frame 52 includes a pair of side frame portions 52a, 52a connected to the left and right end portions of the lower frame 51 and extending upward, and a connecting portion 52b extending in the left-right direction so as to connect the upper end portions of the pair of side frame portions 52a, 52a. The plurality of vertical bars 53 are spaced apart from each other in the left-right direction. Each vertical bar 53 extends in the vertical direction so as to connect the lower frame 51 and the connecting portion 52b of the upper frame 52.

[0022] As shown in FIGS. 1 and 2, a reinforcing portion 10 including first and second bead portions 21, 22 extending in the vehicle vertical direction is provided on the main body portion 2a of the header board 2. The reinforcing portion 10 improves the rigidity of the header board 2, which is advantageous for resonance and torsional deformation of the vehicle load box 1. Further, for example, when a long object is placed in the vehicle load box 1 and leaned against the guard frame 50, a load is applied to the guard frame 50, and the load is transmitted to the header board 2 via the upper rail 30, but the load is efficiently received by the reinforcing portion 10.

[0023] The reinforcing portion 10 bulges forward as a whole from the main body portion 2a of the header board 2 and bulges forward of the pair of extending portions 2b. As shown in FIG. 2, the vertical length of the reinforcing portion 10 is represented by L3.

[0024] The first and second bead portions 21, 22 of the reinforcing portion 10 are constituted by a plurality of convex portions protruding toward the front of the vehicle. The first and second bead portions 21, 22 of the present embodiment are shaped to protrude relatively forward by the first and second concave portions 28, 29 adjacent to both left and right sides. The reinforcing portion 10 including the first and second bead portions 21, 22 is composed of three regions including a pair of first portions 11, 11 on both left and right sides and a second portion 12 between the pair of first portions 11, 11.

[0025] The pair of first portions 11, 11 of the reinforcing portion 10 are provided on both sides in the vehicle width direction of the main body portion 2a of the header board 2. The pair of first portions 11, 11 have a first bead portion 21 and a first concave portion 28 formed in an upper portion above the substantially central portion in the vertical direction of the first portion 11, and a lower portion 23 connected to the lower ends of the first bead portion 21 and the first concave portion 28 and extending downward.

[0026] The vertical length of the first bead portion 21 and the first concave portion 28 is indicated by L1 in FIG. 2. The lower portion 23 includes a first lower portion 23a connected to the lower ends of the first bead portion 21 and the first concave portion 28 and inclined forward as it extends downward, and a second lower portion 23b connected to the lower end of the first lower portion 23a and extending downward.

[0027] As shown in FIG. 4, the bulging ridge line (front-side ridge line) of the first bead portion 21 when viewed from the vehicle width direction extends in a substantially straight line perpendicular to the vertical direction and has no bent portion, unlike the second bead portion 22 described later.

[0028] The second part 12 of the reinforcing part 10 is provided at least at the central part in the vehicle width direction of the header board 2 between the pair of first parts 11, 11. The second part 12 has a second bead part 22 and a second recessed part 29, and a lower part 24 that connects to the lower ends of the second bead part 22 and the second recessed part 29 and extends downward. The lower part 24 of the second part 12 and the second lower part 23b of the first part 11 have substantially the same shape, and the two are smoothly connected in the vehicle width direction.

[0029] As shown in FIG. 2, the vertical length L2 of the second bead part 22 is larger than the vertical length L1 of the first bead part 21 (L2 > L1). The vertical length L2 of the second bead part 22 is substantially equal to the sum of the vertical length L1 of the first bead part 21 and the vertical length of the first lower part 23a of the first part 11. By setting L2 > L1 in this way, in the second part 12, the region where its rigidity is improved becomes wider, and higher rigidity than the first part 11 can be obtained.

[0030] Furthermore, the vertical length L2 of the second bead part 22 is substantially the same as the vertical length L4 of the header board 2. Here, "substantially the same" includes the case where the vertical length L2 of the second bead part 22 is 80 to 100% of the vertical length L4 of the header board 2. By setting L2 to be substantially the same as L4 in this way, the rigidity in substantially the entire vertical direction in the second part 12 is improved.

[0031] Also, the vertical length L3 of the reinforcing part 10 is substantially the same as the vertical length L4 of the header board 2. Here, "substantially the same" includes the case where the vertical length L3 of the reinforcing part 10 is 90 to 100% of the vertical length L4 of the header board 2. By setting L3 to be substantially the same as L4 in this way, the rigidity of substantially the entire main body part 2a of the header board 2 is improved by the reinforcing part 10.

[0032] As shown in FIGS. 1, 2, and 5, the second bead portion 22 of the second part 12 bulges forward of the vehicle more than the first bead portion 21 of the first part 11. The bulging ridge line (front-side ridge line) of the second bead portion 22 when viewed in the vehicle width direction includes an inclined ridge line 25a that inclines toward the front side of the vehicle as it goes downward, a vertical ridge line 25b that connects to the lower end portion of the inclined ridge line 25a and extends vertically downward, and a bent portion 25c that connects the inclined ridge line 25a and the vertical ridge line 25b. Thus, as shown in FIG. 6, the bulging ridge line of the second bead portion 22 bulges forward of the vehicle more than the bulging ridge line of the first bead portion 21.

[0033] In this way, by making the second bead portion 22 bulge forward more than the first bead portion 21, the rigidity of the second part 12, which is located at the center in the vehicle width direction and where load tends to concentrate, can be improved. In particular, since the bulging ridge line of the second bead portion 22 has the bent portion 25c, the rigidity of the second part 12 can be further improved.

[0034] As described above, unlike the bulging ridge line of the second bead portion 22, the bulging ridge line of the first bead portion 21 does not have a bent portion and has a different shape. Thus, by forming the first bead portion 21 and the second bead portion 22 with different shapes in the vehicle width direction in the reinforcing portion 10, the rigidity against input in the vehicle width direction is improved.

[0035] As shown in FIG. 7, a reinforcing member 40 is provided along the vehicle width direction at the upper end portion of the second part 12 of the reinforcing portion 10. By this reinforcing member 40, the rigidity of the second part 12 at the center in the vehicle width direction where load tends to concentrate is improved. The reinforcing member 40 is a plate-like member that extends in the vehicle width direction and is substantially rectangular when viewed from the front.

[0036] As shown in FIGS. 5 and 7, the reinforcing member 40 includes a lower inclined portion 40a that inclines rearward as it extends upward from the lower end portion of the reinforcing member 40, and an upper portion 40b that is connected to the upper end portion of the lower inclined portion 40a and extends upward. The lower inclined portion 40a covers the upper end portion of the second portion 12 of the reinforcing portion 10 from the front. Further, the upper portion 40b covers the lower end portion of the base portion 30a of the upper rail 30 from the front. Thereby, the downward load applied to the guard frame 50 and the upper rail 30 can be easily transmitted to the second bead portion 22 of the second portion 12 via the reinforcing member 40, and the load dispersion effect can be enhanced.

[0037] Also, when a large downward load is generated by a load placed on the guard frame 50, the upper end portions of the upper rail 30 and the header board 2 may be deformed so as to bend forward of the vehicle. However, in the present embodiment, since the reinforcing member 40 is fixed so as to cover the upper end portion of the second portion 12 of the reinforcing portion 10 and the lower end portion of the upper rail 30, the above-described deformation of the header board 2 and the upper rail 30 is suppressed.

[0038] Further, a plurality of concave portions 41 and a plurality of convex portions 42 for bending the reinforcing member 40 in the thickness direction (vehicle front-rear direction) are provided at the lower end portion of the lower inclined portion 40a and the upper end portion of the upper portion 40b of the reinforcing member 40, respectively. The plurality of concave portions 41 and the plurality of convex portions 42 are alternately provided along the longitudinal direction (vehicle width direction) of the reinforcing member 40. The concave portion 41 has a concave shape facing the rear side of the vehicle, and the convex portion 42 has a convex shape facing the front side of the vehicle. In this way, the reinforcing member 40 has an uneven shape and is made into a shape with excellent rigidity.

[0039] The attachment of the reinforcing member 40 to the header board 2 and the upper rail 30 is performed by forming fixing portions 45 by welding or the like at the positions of a plurality of recesses 41. As shown in FIGS. 7 and 8, the recess 41 of the lower inclined portion 40a of the reinforcing member 40 and the second bead portion 22 of the second portion 12 of the header board 2 are abutted against each other at the opposing portions. Then, the fixing portion 45 is provided at the abutted portion by welding or the like. Further, as shown in FIG. 7, the recess 41 of the upper portion 40b of the reinforcing member 40 is applied to the base portion 30a of the upper rail 30, and the fixing portion 45 is provided at the abutted portion by welding or the like.

[0040] As shown in FIG. 2 and the like, the reinforcing member 40 is configured such that the length in the vehicle width direction thereof is substantially the same as the length in the vehicle width direction of the second portion 12 and covers the entire region in the vehicle width direction of the second portion 12. In this way, by making the length in the vehicle width direction of the reinforcing member 40 substantially the same as the length in the vehicle width direction of the second portion 12, the upper end portion of the second portion 12 and the entire vicinity thereof are reinforced, and an improvement in rigidity can be effectively achieved. Further, the load applied to the guard frame 50 and the upper rail 30 can be transmitted to the second portion 12 having excellent rigidity via the reinforcing member 40.

[0041] However, as long as the reinforcing member 40 is provided so as to cover at least a part of the upper end portion of the second portion 12, the length of the reinforcing member 40 in the vehicle width direction is not particularly limited and may be shorter or longer than the length of the second portion 12 in the vehicle width direction.

[0042] However, when the length of the reinforcing member 40 in the vehicle width direction is made longer than the length of the second portion 12 in the vehicle width direction, although a greater reinforcing effect on the header board 2 can be obtained, the vehicle weight increases, and the load applied to the guard frame 50 and the upper rail 30 is also transmitted via the reinforcing member 40 to the first portion 11 having lower rigidity than the second portion 12. Therefore, from the viewpoint of efficiently transmitting the load to the second portion 12, as described above, it is preferable that the length of the reinforcing member 40 in the vehicle width direction be substantially the same as the length of the second portion 12 in the vehicle width direction.

[0043] From here. Also, as described above, a guard frame 50 is provided above the vehicle of the upper rail 30, and the guard frame 50 is provided with a plurality (three in the illustrated example) of upper and lower bars 53 spaced apart from each other in the vehicle width direction. Then, as shown in FIG. 2 and the like, the second portion 12 of the reinforcing portion 10 is located between at least a pair of upper and lower bars 53 in the vehicle width direction. In the present embodiment, in the vehicle width direction, the second portion 12 of the reinforcing portion 10 is located between a pair of upper and lower bars 53 at both left and right ends among the three upper and lower bars 53. Thereby, the load transmitted from the upper and lower bars 53 of the guard frame 50 can be effectively received by the highly rigid second portion 12.

[0044] In particular, in the present embodiment, not only the second portion 12 of the reinforcing portion 10 but also the reinforcing member 40 is located between a pair of upper and lower bars 53 at both left and right ends among the three upper and lower bars 53. Therefore, the load applied to the upper and lower bars 53 of the guard frame 50 can be efficiently transmitted to the second portion 12 via the reinforcing member 40.

[0045] As described above, according to the vehicle load box structure of the present embodiment, the reinforcing member 40 has a pair of first portions 11 provided on both end portions in the vehicle width direction of the header board 2, and between the pair of first portions 11, it has a second portion 12 provided at least at the central portion in the vehicle width direction of the header board 2, and the second bead portion 22 provided on the second portion 12 bulges in at least one of the vehicle front-rear direction. Therefore, the rigidity of the second portion 12 including the central portion of the header board 2 that is most likely to deform due to an external force in the vertical direction or the front-rear direction of the vehicle is improved, so that the deformation of the header board 2 can be suppressed. Also, since the reinforcing portion 10 includes the first portion 11 and the second portion 12 having different shapes in the vehicle width direction, the deformation prevention effect is improved also against an external force in the vehicle width direction.

[0046] According to the vehicle load box 1 in the present embodiment, since the second bead portion 22 provided on the second portion 12 bulges more forward in the vehicle than the first bead portion 21 provided on the first portion 11, the volume of the load box can be increased.

[0047] Note that the second bead portion 22 provided in the second portion 12 is not limited to a configuration that bulges forward of the vehicle with respect to the first bead portion 21 provided in the first portion 11, and conversely, it may be configured to bulge rearward of the vehicle. That is, the first and second bead portions 21 and 22 may bulge rearward of the vehicle, and the second bead portion 22 may bulge rearward of the vehicle with respect to the first bead portion 21.

[0048] According to the present embodiment, since the second bead portion 22 provided in the second portion 12 has a shape including a bent portion 25c where the bulging ridge line when viewed from the vehicle width direction bends, the rigidity of the second bead portion 22 is improved by this bent portion 25d. As a result, a header board 2 with sufficient strength can be obtained without necessarily providing a reinforcing member 40 made of a separate member.

[0049] Further, according to the reinforcing portion 10, since the shapes of the first and second bead portions 21 and 22 are different between the first portion 11 and the second portion 12, and the shapes of the lower portions 23 and 24 are different, the rigidity improvement effect is enhanced.

[0050] According to the present embodiment, since the second bead portion 22 of the second portion 12 is configured such that the vertical length L2 is longer than the vertical length L1 of the first bead portion 21 of the first portion 11, the rigidity of the second portion 12 where the load is likely to be applied can be improved.

[0051] According to the present embodiment, the vertical length L2 of the second bead portion 22 is substantially the same as the vertical length L4 of the header board 2. Therefore, the rigidity in substantially the entire vertical direction in the second portion 12 is improved.

[0052] According to the present embodiment, since the upper rail 30 is attached along the vehicle width direction to the upper end portion 2c of the header board 2, the rigidity of the header board 2 can be improved.

[0053] According to this embodiment, a reinforcing member 40 is provided along the vehicle width direction at the upper end portion of the second portion 12. Therefore, the reinforcing member 40 can improve the rigidity of the upper end portion of the second portion 12 and the vicinity area thereof where external force is likely to concentrate.

[0054] According to this embodiment, the length of the reinforcing member 40 in the vehicle width direction is substantially the same as the length of the second portion 12 in the vehicle width direction. Therefore, the second portion 12 can be effectively reinforced. Also, compared with the case where the reinforcing member 40 is provided over the entire vehicle width direction of the reinforcing portion 10, an increase in weight can be suppressed, and the load applied to the guard frame 50 and the upper rail 30 can be efficiently transmitted to the second portion 12 having excellent rigidity via the reinforcing member 40.

[0055] According to this embodiment, an upper rail 30 is provided along the vehicle width direction at the upper end portion of the header board 2, and the reinforcing member 40 is provided so as to cover the upper end portion of the second portion 12 and the lower end portion of the upper rail 30. Therefore, the load applied to the upper rail 30 can be easily transmitted to the second bead portion 22 of the second portion 12 via the reinforcing member 40, and the load dispersion effect can be enhanced. Since it is fixed so as to cover the upper end portion of the second portion 12 of the reinforcing portion 10 and the lower end portion of the upper rail 30, deformation such as bending forward of the header board 2 and the upper rail 30 is suppressed.

[0056] According to this embodiment, the second portion 12 is located between at least a pair of upper and lower cross members 53 in the vehicle width direction. Therefore, the load applied to the guard frame 50 and transmitted to the upper and lower cross members 53 can be received by the second portion 12 having high rigidity, and deformation of the header board 2 against the external force from the guard frame 50 can be suppressed.

[0057] As described above, the embodiments of the present invention have been described, but the present invention can be appropriately changed within the scope of its technical idea.

Explanation of Reference Numerals

[0058] 1 Vehicle load box 2 Header board 2a Body part 2b Extension part 2c Upper end part 3 Side gate 3a Wheel arch 4 Tail gate 5 Floor panel 10 Reinforcement part 11 First part 12 Second part 21 First bead part 22 Second bead part 23 Lower part 23a First lower part 23b Second lower part 24 Lower part 25a Inclined ridge line 25b Vertical ridge line 25c Bending part 28 First concave part 29 Second concave part 30 Upper rail 30a Base part 30b Extended part 40 Reinforcement member 40a Lower inclined part 40b Upper part 41 Concave part 42 Convex part 45 Fixing part 50 Guard frame 51 Lower frame 52 Upper frame 52a Side frame part 52b Connection part 53 Vertical crossbar L1, L2, L3, L4 Vertical length

Claims

1. A vehicle load box structure including a header board that forms a wall surface on the front side of the vehicle in the vehicle load box, wherein a reinforcing portion including a bead portion extending in the vehicle up-and-down direction is provided on the header board, the reinforcing portion has a pair of first portions provided on both end sides in the vehicle width direction of the header board, and a second portion provided at least at a central portion in the vehicle width direction of the header board between the pair of first portions, and the bead portion provided on the second portion bulges at least in one direction in the vehicle front-rear direction more than the bead portion provided on the first portion, and a length of the bead portion provided on the second portion in the vehicle up-and-down direction is longer than a length of the bead portion provided on the first portion in the vehicle up-and-down direction, a vehicle load box structure.

2. The vehicle load box structure according to claim 1, wherein the bead portion provided on the second portion bulges forward of the vehicle more than the bead portion provided on the first portion, a vehicle load box structure.

3. The vehicle load box structure according to claim 1 or 2, wherein the bead portion provided on the second portion has a shape including a bent portion where a bulging ridge line bulges when viewed from the vehicle width direction, a vehicle load box structure.

4. The vehicle load box structure according to claim 1 or 2, wherein a length of the bead portion provided on the second portion in the vehicle up-and-down direction is substantially the same as a length of the header board in the vehicle up-and-down direction, a vehicle load box structure.

5. The vehicle load box structure according to claim 1 or 2, wherein an upper rail is provided along the vehicle width direction at an upper end portion of the header board, a vehicle load box structure.

6. The vehicle load box structure according to claim 1 or 2, wherein a reinforcing member is provided along the vehicle width direction at an upper end portion of the second portion, a vehicle load box structure.

7. The vehicle load box structure according to claim 6, wherein a length of the reinforcing member in the vehicle width direction is configured to be substantially the same as a length of the second portion in the vehicle width direction, a vehicle load box structure.

8. The vehicle load box structure according to claim 6, wherein an upper rail is provided along the vehicle width direction at an upper end portion of the header board, and the reinforcing member is provided so as to cover an upper end portion of the second portion and a lower end portion of the upper rail, a vehicle load box structure.

9. The vehicle load box structure according to claim 8, wherein a guard frame is provided above the vehicle of the upper rail, and a plurality of upper and lower cross members spaced apart from each other in the vehicle width direction are provided on the guard frame, The second part is located between at least a pair of the upper and lower cross bars in the vehicle width direction. Vehicle load box structure.

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