Anti-drilling protector structure

Abstract

The RUP (10) includes: a rectangular cylindrical protector body (13) extending in the vehicle width direction below the rear end of the body frame; and a reinforcing member (17) disposed in the protector interior space of the protector body (13). The protector body (13) has an inner protector member (18) and an outer protector member (19). The inner longitudinal plate portion (20) of the inner protector member (18) has a supported area (43) supported from the front by a protector side fixing portion (11b) of the bracket (11). The reinforcing member (17) is formed with a generally L-shaped cross section having a reinforcing transverse plate portion (17a) and a reinforcing longitudinal plate portion (17b), and is fixed to the protector body (13). The bends (44) of the reinforcing horizontal plate (17a) and the reinforcing vertical plate (17b) extend in a straight line in the front-rear direction from the position where they contact the rear surface of the supported area (43) of the inner vertical plate (20) to a position close to the front surface of the outer vertical plate (23).

Description

Technical Field

[0001] The present disclosure relates to an underrun protector configuration. Background Art

[0002] Patent document 1 discloses an underrun protector. The underrun protector includes: a main member which is cylindrical and rectangular in cross section and is mounted on the front of the vehicle body frame along the vehicle width direction; and a reinforcing member which is arranged inside the main member. On the back of the main member, mounting legs are mounted at intervals in the vehicle width direction, and the legs are mounted on the front of the vehicle body frame. The reinforcing member is a shape formed by folding back a plate which is long and horizontal in the vehicle width direction alternately up and down in the vehicle width direction, and is inserted into the inside from an opening at one end of the main member. The reinforcing member is a shape formed by folding back a plate whose width in the vehicle front-to-back direction is substantially equal to the inner width of the main member in the vehicle front-to-back direction in a mountain shape alternately in the vehicle width direction, and its lower part (valley part) is supported on the bottom surface of the main member, and the overall height is substantially equal to the inner dimension of the main member in the up-down direction. In addition, the gazette illustrates a state in which the inclined part between the mountain part and the valley part in the reinforcing member is arranged between the upper and lower bolts and nuts which fix the main member and the mounting legs.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2010-6278 Summary of the invention

[0006] Technical problem to be solved by the invention

[0007] In the anti-drilling protector described in Patent Document 1, since an inclined portion of a reinforcing member is arranged between the upper and lower bolts and nuts that fix the main member (protector body) and the mounting leg (bracket), when a load is input to the anti-drilling protector, the load input from the front of the bracket in the protector body is input to the inclined portion of the reinforcing member. That is, the load input from the front of the bracket in the protector body is borne by the portion of the reinforcing member extending in a straight line, so when a load is input to the anti-drilling protector, there is a possibility that the reinforcing member will deform and the protector body will deform. In addition, if other reinforcing members are additionally provided, the structure of the anti-drilling protector may be complicated.

[0008] Therefore, an object of the present disclosure is to provide an underrun protector structure capable of ensuring the strength of the underrun protector with a simple configuration.

[0009] Technical means for solving technical problems

[0010] In order to solve the above-mentioned problems, the first mode of the present invention is an anti-drilling protector structure, which is fixed to the vehicle body frame via a bracket, extends in the vehicle width direction below the end of one side of the vehicle body frame in the front-rear direction, prevents collision objects from sneaking into the lower part of the vehicle body frame from the said side of the vehicle, and is provided with a protector body and a reinforcing member. The protector body has: an inner longitudinal plate portion, which extends in the vehicle width direction and is fixed to the bracket in a state in which the said one side of the bracket is erected; an outer longitudinal plate portion, which extends in the vehicle width direction in a state in which it is erected from the inner longitudinal plate portion to a position separated from the said one side; a protector upper plate portion, which connects the upper end edges of the inner longitudinal plate portion and the outer longitudinal plate portion to each other; and a protector lower plate portion, which connects the lower end edges of the inner longitudinal plate portion and the outer longitudinal plate portion to each other, and the protector body defines a protector internal space extending in the vehicle width direction by the inner longitudinal plate portion, the outer longitudinal plate portion, the protector upper plate portion, and the protector lower plate portion. The reinforcing member is formed to have a substantially L-shaped cross section having a first reinforcing plate portion and a second reinforcing plate portion, and is arranged in the internal space of the protector in a state where the bent portions of the first reinforcing plate portion and the second reinforcing plate portion extend in the front-to-back direction, and is fixed to the protector body. The inner longitudinal plate portion has a supported region supported by the bracket from the other side in the front-to-back direction. The bent portion of the reinforcing member is arranged on the one side of the supported region of the inner longitudinal plate portion, and extends from a position close to or in contact with the supported region of the inner longitudinal plate portion to a position close to or in contact with the outer longitudinal plate portion.

[0011] In the above configuration, the reinforcing member disposed in the protector internal space of the protector body is formed to have a substantially L-shaped cross section, and the bent portion of the reinforcing member is disposed on one side of the supported region of the inner longitudinal plate portion that is supported by the bracket from the other side in the front-rear direction, and extends from a position close to or in contact with the supported region of the inner longitudinal plate portion to a position close to or in contact with the outer longitudinal plate portion. Therefore, when a load is input to the anti-drilling protector, the load input from the front side of the bracket in the protector body is input to the bent portion of the reinforcing member having a substantially L-shaped cross section. In this way, since the load input from the front side of the bracket in the protector body can be borne by the bent portion of the reinforcing member, deformation of the reinforcing member can be suppressed, and the strength of the anti-drilling protector can be ensured.

[0012] Therefore, according to the above configuration, the strength of the underrun protector can be ensured with a simple configuration in which the bent portion of the reinforcing member having a substantially L-shaped cross section is arranged on one side of the supported region of the inner vertical plate portion in a state extending in the front-rear direction.

[0013] A second aspect of the present invention is the underrun protector structure of the first aspect, wherein at least one of the first reinforcing plate portion and the second reinforcing plate portion has an edge portion on the outer longitudinal plate portion side shorter than an edge portion on the inner longitudinal plate portion side.

[0014] In the configuration, the length of the end edge portion (the end edge portion on the one side) of at least one of the first reinforcing plate portion and the second reinforcing plate portion (hereinafter referred to as "one plate portion") on the outer longitudinal plate portion side is formed shorter than the length of the end edge portion (the end edge portion on the other side) on the inner longitudinal plate portion side. In this way, since the length of the end edge portion on the outer longitudinal plate portion side of one plate portion is made shorter than the length of the end edge portion on the inner longitudinal plate portion side, the reinforcing member can be made lighter compared to a case where the length of the end edge portion on the outer longitudinal plate portion side and the length of the end edge portion on the inner longitudinal plate portion side are the same length. In addition, since the end edge portion on the inner longitudinal plate portion side of one plate portion is made longer, the load input to one plate portion from the one side (the outer longitudinal plate portion side) can be transferred to a wide range of the inner longitudinal plate portion. Therefore, the reinforcing member can be made lighter and the load input to the reinforcing member can be transferred to a wide range of the inner longitudinal plate portion.

[0015] The third aspect of the present invention is the anti-drilling protector structure of the first aspect or the second aspect, wherein the bent portion of the reinforcing member is arranged at a position separated downward from the protector upper plate portion and separated upward from the protector lower plate portion. The first reinforcing plate portion extends from the bent portion to the outside in the vehicle width direction at a position separated downward from the protector upper plate portion and separated upward from the protector lower plate portion. The second reinforcing plate portion extends upward or downward from the bent portion in a manner orthogonal to the first reinforcing plate portion. The end edge portion of the inner longitudinal plate portion side of the first reinforcing plate portion extends from the bent portion along the inner longitudinal plate portion to the outside in the vehicle width direction relative to the supported area, and is welded to the inner longitudinal plate portion.

[0016] In the above configuration, since the bent portion of the reinforcing member is arranged at a position separated downward from the upper plate portion of the protector and separated upward from the lower plate portion of the protector, the strength of the middle portion between the upper plate portion of the protector and the lower plate portion of the protector in the front-to-back direction can be ensured by the bent portion of the reinforcing member.

[0017] In addition, the end edge portion on the inner longitudinal plate portion side of the first reinforcing plate portion extends from the bent portion along the inner longitudinal plate portion to the outside of the supported area in the vehicle width direction, and is welded to the inner longitudinal plate portion. That is, the end edge portion on the inner longitudinal plate portion side of the first reinforcing plate portion is welded to the inner longitudinal plate portion in a state of intersecting with the outer end portion in the vehicle width direction of the supported area of ​​the inner longitudinal plate portion. Therefore, for example, when the end edge portion on the inner longitudinal plate portion side of the first reinforcing plate portion is linearly welded to the inner longitudinal plate portion, and the load from the one side is input to the outer end portion in the vehicle width direction of the anti-drill protector (for example, in the case of an oblique collision), it is possible to suppress the protector body on the outside of the bracket in the vehicle width direction from deforming toward the other side.

[0018] The fourth aspect of the present invention is the anti-drilling protector structure of the third aspect, wherein the second reinforcing plate has an edge extending along the protector upper plate or the protector lower plate in the front-rear direction, and the edge of the second reinforcing plate is welded to the protector upper plate or the protector lower plate.

[0019] In the above configuration, the edge of the second reinforcing plate is welded to the protector upper plate or the protector lower plate. Therefore, when a load is input to the protector body from the one side, the protector upper plate or the protector lower plate is prevented from deforming in a manner of bulging upward or downward.

[0020] Effects of the Invention

[0021] According to the present disclosure, the strength of the underrun protector can be ensured with a simple configuration. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a side view of a vehicle to which the underrun protector according to one embodiment of the present invention is applied.

[0023] Figure 2 yes Figure 1 An enlarged view of the main part.

[0024] Figure 3 Observe from the front Figure 2 The main view of the status.

[0025] Figure 4 This is a perspective view of a state where the protector outer member of the anti-drilling protector is removed.

[0026] Figure 5 This is a plan view showing the main parts of the underrun protector as seen from above.

[0027] Figure 6 yes Figure 5 Sectional view viewed in the direction VI-VI. DETAILED DESCRIPTION

[0028] Hereinafter, an embodiment of the present invention will be described based on the accompanying drawings. In addition, in each of the drawings, FR indicates the front of the vehicle, UP indicates the upper side, and IN indicates the inner side in the vehicle width direction. In addition, in the following description, the front-rear direction indicates the front-rear direction of the vehicle, and the left-right direction indicates the left-right direction in a state facing the front of the vehicle.

[0029] like Figure 1 As shown, the vehicle 1 to which the underrun protector structure of the present embodiment is applied is a flat-head type vehicle 1 in which the cab 2 is located approximately above the engine (not shown), and has a vehicle body frame 3. A front underrun protector (underrun protector) 50 (hereinafter referred to as "FUP50") extending in the vehicle width direction is provided below the front end portion of the vehicle body frame 3, and a rear underrun protector (underrun protector) 10 (hereinafter referred to as "RUP10") extending in the vehicle width direction is provided below the rear end portion of the vehicle body frame 3. The FUP50 and RUP10 are respectively connected via a pair of left and right brackets 11 (at Figure 1Only the left bracket 11 is shown in the figure. ) is fixed to the vehicle body frame 3 to prevent the other vehicle (collision object) such as a passenger car with a lower vehicle height from diving under the vehicle body frame 3 when colliding with the other vehicle. In addition, the FUP 50 and the RUP 10 are symmetrically arranged at the front and rear of the vehicle 1 and have substantially the same structure. Therefore, the RUP 10 will be described below, and the description of the FUP 50 will be omitted.

[0030] The vehicle body frame 3 includes a pair of left and right side members 4 extending in the front-rear direction on both sides in the vehicle width direction, and a cross member (not shown) extending in the vehicle width direction and connecting the left and right side members 4 to each other.

[0031] like Figure 1 to Figure 3 As shown, the left and right brackets 11 respectively include: a frame-side fixing portion 11a fixed to the upper end side of the left and right side beams 4; and a protector-side fixing portion 11b fixed to the front surface 12 of the RUP 10, and the left and right brackets 11 extend downward from the left and right side beams 4. In this embodiment, the protector-side fixing portion 11b is formed in a plate shape intersecting the front-rear direction, and is fixed in a state of surface contact with the front surface 12 of the RUP 10.

[0032] like Figure 2 to Figure 6 As shown, the RUP 10 includes: a rectangular cylindrical protector body 13 extending in the vehicle width direction below the rear end portion (the end portion on one side in the front-rear direction) of the vehicle body frame 3; and a pair of left and right reinforcing members 17 arranged in an internal space 14 of the protector body 13 (hereinafter referred to as "protector internal space 14". See Figure 6 . ) In addition, the reinforcing members 17 are symmetrically provided on the left and right sides of the vehicle 1 and have substantially the same structure. Therefore, the left side will be described below, and the description of the right side will be omitted.

[0033] The protector body 13 includes a protector inner member 18 fixed to the protector side fixing portion 11b of the left and right brackets 11 and extending in the vehicle width direction, and a protector outer member 19 extending in the vehicle width direction behind the protector inner member 18 and joined to the protector inner member 18. Both end portions of the protector body 13 in the vehicle width direction are respectively arranged on the outer side of the left and right brackets 11 in the vehicle width direction.

[0034] The protector inner member 18 is a member having a roughly U-shaped cross section, and is integrally formed with: an inner longitudinal plate portion 20, which extends in the vehicle width direction while intersecting the front-rear direction; and an inner upper plate portion (protector upper plate portion) 21 and an inner lower plate portion (protector lower plate portion) 22, which bend from the upper and lower edges of the inner longitudinal plate portion 20 and extend rearward and face each other vertically. The inner longitudinal plate portion 20 stands upright in a vertical direction. The inner upper plate portion 21 and the inner lower plate portion 22 extend in a roughly horizontal direction. The inner longitudinal plate portion 20 has left and right supported areas 43 supported from the front by the protector-side fixing portions 11b of the left and right brackets 11. In addition, in Figure 3 In order to make the supported area 43 easier to understand, a single-dot chain line 43 is shown slightly inside the outer periphery of the supported area 43 (the outer periphery of the protector side fixing portion 11b). That is, the supported area 43 of the inner longitudinal plate portion 20 is an area covered and supported from the front by the protector side fixing portion 11b. The supported area 43 of the protector inner member 18 is fastened to the protector side fixing portion 11b of the bracket 11. In the present embodiment, the protector inner member 18 includes: a pair of left and right first reinforcement members 15 described later; and a pair of left and right second reinforcement members 16 described later.

[0035] The protector outer member 19 is a member having a roughly U-shaped cross section, and is integrally formed with: an outer longitudinal plate portion 23, which extends in the vehicle width direction while intersecting the front-rear direction; an outer upper plate portion (protector upper plate portion) 24 and an outer lower plate portion (protector lower plate portion) 25, which bend from the upper and lower edges of the outer longitudinal plate portion 23 and extend forward (the other side of the front-rear direction) and face each other up and down. The outer longitudinal plate portion 23 stands upright in the vertical direction. The outer upper plate portion 24 and the outer lower plate portion 25 extend in a roughly horizontal direction. The front end portion of the outer upper plate portion 24 is joined in a state of overlapping with the rear end portion of the inner upper plate portion 21 from above. The front end portion of the outer lower plate portion 25 is joined in a state of overlapping with the rear end portion of the inner lower plate portion 22 from below. By joining the outer upper plate 24 and the outer lower plate 25 to the inner upper plate 21 and the inner lower plate 22, the protector inner member 18 and the protector outer member 19 are joined to each other and become a cylindrical shape with a substantially rectangular cross section, defining the protector inner space 14 extending in the vehicle width direction. In the state where the protector inner member 18 and the protector outer member 19 are joined, the outer longitudinal plate 23 stands upright at a position separated from the inner longitudinal plate 20 to the rear, and faces the inner longitudinal plate 20 from the rear. In addition, the inner upper plate 21 and the outer upper plate 24 (hereinafter referred to as "upper plate 21, 24") connect the upper end edges of the inner longitudinal plate 20 and the outer longitudinal plate 23 to each other, and the inner lower plate 22 and the outer lower plate 25 (hereinafter referred to as "lower plate 22, 25") connect the lower end edges of the inner longitudinal plate 20 and the outer longitudinal plate 23 to each other.

[0036] like Figure 4 and Figure 6As shown, the first reinforcement 15 is formed in a substantially L-shaped cross section and includes an upper plate portion 15a extending in the vehicle width direction along the lower surface of the inner upper plate portion 21, and a front plate portion 15b extending in the vehicle width direction along the rear surface of the inner longitudinal plate portion 20 while being bent downward from the front end edge of the upper plate portion 15a. The front plate portion 15b of the first reinforcement 15 is formed longer in both sides in the vehicle width direction than the supported region 43 of the inner longitudinal plate portion 20, is arranged so as to straddle the supported region 43 of the inner longitudinal plate portion 20 in the vehicle width direction, and is welded to the inner longitudinal plate portion 20. The upper plate portion 15a of the first reinforcement 15 is formed to have substantially the same length as the front plate portion 15b in the vehicle width direction and is welded to the inner upper plate portion 21. The first reinforcement 15 is fastened and fixed to the protector-side fixing portion 11b of the bracket 11 together with the supported region 43 of the protector inner member 18.

[0037] The second reinforcement 16 is formed in a substantially L-shaped cross section and includes a lower plate portion 16a extending in the vehicle width direction along the upper surface of the inner lower plate portion 22, and a front plate portion 16b extending in the vehicle width direction along the rear surface of the inner longitudinal plate portion 20 while being bent upward from the front end edge of the lower plate portion 16a. The front plate portion 16b of the second reinforcement 16 is formed longer in both sides in the vehicle width direction than the supported region 43 of the inner longitudinal plate portion 20, is arranged so as to straddle the supported region 43 of the inner longitudinal plate portion 20 in the vehicle width direction, and is welded to the inner longitudinal plate portion 20. The lower plate portion 16a of the second reinforcement 16 is formed to have substantially the same length as the front plate portion 16b in the vehicle width direction and is welded to the inner lower plate portion 22. The second reinforcement 16 is fastened and fixed to the protector-side fixing portion 11b of the bracket 11 together with the supported region 43 of the protector inner member 18. That is, the second reinforcement 16 and the first reinforcement 15 are provided vertically symmetrically.

[0038] like Figure 3 to Figure 6 As shown in the figure, the reinforcing member 17 is formed to have a substantially L-shaped cross section having a reinforcing transverse plate portion (first reinforcing plate portion) 17a and a reinforcing longitudinal plate portion (second reinforcing plate portion) 17b, and is arranged in the protector internal space 14 and fixed to the protector body 13. The bent portion 44 of the reinforcing transverse plate portion 17a and the reinforcing longitudinal plate portion 17b is arranged behind the supported region 43 of the inner longitudinal plate portion 20 of the protector body 13 and substantially in the center of the supported region 43 in the up-down direction and the vehicle width direction, and extends linearly in the front-back direction (in the present embodiment, in the direction orthogonal to the inner longitudinal plate portion 20 and the outer longitudinal plate portion 23). That is, the bent portion 44 of the reinforcing member 17 is arranged at a position separated downward from the upper plate portions 21 and 24 of the protector body 13 and separated upward from the lower plate portions 22 and 25. The bent portion 44 of the reinforcing member 17 extends from a position in contact with the rear surface of the supported region 43 of the inner vertical plate portion 20 of the protector body 13 to a position close to the front surface of the outer vertical plate portion 23 .

[0039] The reinforcing transverse plate portion 17a of the reinforcing member 17 is arranged at a position separated downward from the upper plate portions 21 and 24 of the protector body 13 and separated upward from the lower plate portions 22 and 25, and intersects with the up-down direction (in the present embodiment, extends substantially horizontally). The reinforcing transverse plate portion 17a is formed into a substantially pentagonal shape in a plan view, and has: a front end edge portion (an edge portion on the inner longitudinal plate portion side of the first reinforcing plate portion) 27 extending in the vehicle width direction; a rear end edge portion 28 extending in the vehicle width direction; an inner edge portion (bend portion 44) extending in the front-to-back direction; an outer edge portion 32 extending in the front-to-back direction; and an inclined edge portion 31 inclined relative to the front-to-back direction (see Figure 5 The front end edge 27 of the reinforcing transverse plate portion 17a extends from the front end of the bent portion 44 along the rear surface of the inner longitudinal plate portion 20 in the vehicle width direction to a position closer to the vehicle width direction outside than the outer end edge (vehicle width direction outer end) 43a of the supported region 43 of the inner longitudinal plate portion 20 in the vehicle width direction, and is linearly welded to a predetermined welding region 29 (see FIG. 2 ) on the rear surface of the inner longitudinal plate portion 20. Figure 3 ). The outer edge portion 32 of the reinforcing transverse plate portion 17a is arranged on the outside in the vehicle width direction of the outer edge portion 43a in the vehicle width direction of the supported area 43 of the inner longitudinal plate portion 20, and extends rearward from the rear surface side of the inner longitudinal plate portion 20. The rear end edge portion 28 of the reinforcing transverse plate portion 17a extends from the rear end of the bending portion 44 to the outside in the vehicle width direction at a position close to the front surface of the outer longitudinal plate portion 23. The rear end edge portion 28 is slightly separated from the front surface of the outer longitudinal plate portion 23 toward the front. The outer end portion 30 in the vehicle width direction of the rear end edge portion 28 of the reinforcing transverse plate portion 17a is located on the inside in the vehicle width direction of the outer edge portion 32 of the reinforcing transverse plate portion 17a. That is, the rear end edge portion 28 of the reinforcing transverse plate portion 17a is shorter than the front end edge portion 27 in the vehicle width direction. The inclined edge portion 31 of the reinforcing cross plate portion 17 a extends linearly forward and outward in the vehicle width direction from the outer end portion 30 of the rear end edge portion 28 of the reinforcing cross plate portion 17 a and continues to the rear end of the outer edge portion 32 .

[0040] The reinforcing longitudinal plate portion 17b of the reinforcing member 17 stands upright in the vertical direction from the bent portion 44 in a state intersecting the vehicle width direction. The reinforcing longitudinal plate portion 17b is formed into a substantially pentagonal shape in a side view, and has: a lower edge portion (bent portion 44) extending in the front-to-back direction; a front end edge portion (edge ​​portion on the inner longitudinal plate portion side of the second reinforcing plate portion) 33 extending in the up-down direction; a rear end edge portion 34 extending in the up-down direction; an upper edge portion (edge ​​portion of the second reinforcing plate portion) 35 extending in the front-to-back direction; and an inclined edge portion 38 inclined relative to the front-to-back direction (see FIG. 2 ). Figure 6The front end edge 33 of the reinforcing longitudinal plate portion 17b extends upward from the front end of the bent portion 44 along the rear surface of the supported region 43 of the inner longitudinal plate portion 20 (in this embodiment, the rear surface of the front plate portion 15b including the first reinforcing member 15), and is linearly welded to a predetermined welding region 36 (see Figure 3 ). The rear end edge portion 34 of the reinforcing longitudinal plate portion 17b extends upward from the rear end of the bent portion 44 at a position close to the front surface of the outer longitudinal plate portion 23. The rear end edge portion 34 is slightly separated from the front surface of the outer longitudinal plate portion 23 toward the front. The upper end edge portion 35 of the reinforcing longitudinal plate portion 17b extends in the front-to-back direction along the lower surface of the inner upper plate portion 21 (in this embodiment, the lower surface of the upper plate portion 15a including the first reinforcement member 15) and is linearly welded to a predetermined welding area 37 (see Figure 5 The inclined edge portion 38 of the reinforcing vertical plate portion 17 b extends linearly from the upper end portion 39 of the rear end edge portion 34 toward the upper front side and continues to the rear end of the upper edge portion 35 .

[0041] In the RUP 10 constructed as described above, the reinforcing member 17 is arranged in the protector internal space 14 of the protector main body 13 in a state where the bent portion 44 of the reinforcing member 17 having a substantially L-shaped cross section extends in the front-to-back direction. Furthermore, the bent portion 44 of the reinforcing member 17 is arranged behind the supported area 43 of the inner longitudinal plate portion 20 of the protector main body 13, and extends from a position in contact with the rear surface of the supported area 43 of the inner longitudinal plate portion 20 (in the present embodiment, the rear surface of the front plate portion 15b of the first reinforcement 15) to a position close to the front surface of the outer longitudinal plate portion 23. Therefore, when an opponent vehicle collides with the vehicle 1 from the rear and a load is input to the RUP 10 from the rear, the front face ( Figure 5 The load inputted from the front side of the bracket 11 in the protector body 13 (in the direction indicated by the hollow arrow 40) is inputted to the bent portion 44 of the reinforcing member 17 having a substantially L-shaped cross section. In this way, the bent portion 44 of the reinforcing member 17 can bear the load inputted from the front side of the bracket 11 in the protector body 13, thereby suppressing the deformation of the reinforcing member 17 and ensuring the strength of the RUP 10.

[0042] Therefore, according to the present embodiment, the strength of the RUP 10 can be ensured by a simple configuration in which the bent portion 44 of the reinforcing member 17 having a substantially L-shaped cross section is arranged behind (on one side of) the supported region 43 of the inner vertical plate 20 while extending in the front-rear direction.

[0043] In addition, since the rear end edge 28 of the reinforcing transverse plate portion 17a of the reinforcing member 17 is shorter than the front end edge 27 in the vehicle width direction, the reinforcing transverse plate portion 17a of the reinforcing member 17 can be made lighter in weight compared to a case where the rear end edge 28 and the front end edge 27 are made to have the same length and the reinforcing transverse plate portion 17a is formed into a substantially rectangular shape in a plan view. In addition, since the front end edge 27 of the reinforcing transverse plate portion 17a is made longer than the rear end edge 28, the load input to the reinforcing transverse plate portion 17a of the reinforcing member 17 from the rear can be transmitted to a wide range of the inner longitudinal plate portion 20. Therefore, the reinforcing member 17 can be made lighter in weight and the load input to the reinforcing member 17 can be transmitted to a wide range of the inner longitudinal plate portion 20. In addition, because the rear end edge 34 of the reinforced longitudinal plate portion 17b of the reinforcing member 17 is shorter in the up and down direction than the front end edge 33, the reinforcing member 17 can be made lighter in weight, similar to the above-mentioned reinforced transverse plate portion 17a, while the load input into the reinforcing member 17 can be transmitted to a wide range of the inner longitudinal plate portion 20.

[0044] In addition, the bent portion 44 of the reinforcing member 17 is arranged at a position separated downward from the upper plate portions 21, 24 of the protector body 13 and separated upward from the lower plate portions 22, 25. Therefore, the bent portion 44 of the reinforcing member 17 can ensure the strength of the middle portion in the vertical direction of the protector body 13 (the middle portion in the vertical direction between the upper plate portions 21, 24 and the lower plate portions 22, 25 of the protector body 13) where the compressive strength in the front-back direction is relatively low.

[0045] In addition, the front end edge 27 of the reinforcing transverse plate portion 17a of the reinforcing member 17 extends from the bent portion 44 side along the rear surface of the inner longitudinal plate portion 20 in the vehicle width direction to the outside in the vehicle width direction of the outer end edge 43a in the vehicle width direction of the supported region 43 of the inner longitudinal plate portion 20, and is linearly welded to a predetermined welding region 29 (see FIG. 2 ) on the rear surface of the inner longitudinal plate portion 20. Figure 3 That is, the front end edge 27 of the reinforcing transverse plate 17a is welded to the inner longitudinal plate 20 in a linear manner along the vehicle width direction while intersecting with the outer end edge 43a of the supported area 43 of the inner longitudinal plate 20. Therefore, when the vehicle collides with the other vehicle (for example, when the vehicle collides at an angle), the load from the rear is Figure 5 When input is input to the outer end portion in the vehicle width direction of the RUP 10 as indicated by the hollow arrow 41, it is possible to suppress the area of ​​the protector body 13 that is closer to the outside in the vehicle width direction than the bracket 11 from bending and deforming forward at the position of the outer end edge 42 in the vehicle width direction of the protector side fixing portion 11b of the bracket 11 (the outer end edge 43a in the vehicle width direction of the supported area 43).

[0046] The upper edge 35 of the reinforcing longitudinal plate portion 17b of the reinforcing member 17 extends along the lower surface of the inner upper plate portion 21 in the front-rear direction and is linearly welded to a predetermined welding area 37 (see FIG. Figure 5 ). Therefore, when a load is input to the RUP 10 from the rear, it is possible to prevent the upper plate portions 21 and 24 of the protector body 13 from deforming in a manner of bulging upward and the upper plate portions 21 and 24 from deforming in a manner of recessing downward.

[0047] In addition, in the present embodiment, the inner longitudinal plate portion 20 and the outer longitudinal plate portion 23 of the protector body 13 are erected in the vertical direction, but this is not limited to this, and any position may be crossed with the front-rear direction. In addition, in the present embodiment, the lower plate portions 22, 25 and the upper plate portions 21, 24 of the protector body 13 are extended in the substantially horizontal direction, but this is not limited to this, and any position may be crossed with the up-down direction.

[0048] In addition, in the present embodiment, the rear end edge portion 28 of the reinforcing transverse plate portion 17a of the reinforcing member 17 and the rear end edge portion 34 of the reinforcing longitudinal plate portion 17b are separated forward from the front surface of the outer longitudinal plate portion 23, but the present invention is not limited thereto and the rear end edge portion 28 of the reinforcing transverse plate portion 17a and the rear end edge portion 34 of the reinforcing longitudinal plate portion 17b of the reinforcing member 17 may be welded to the outer longitudinal plate portion 23.

[0049] In addition, in the present embodiment, although the upper edge portion 35 of the reinforcing longitudinal plate portion 17b of the reinforcing member 17 is linearly welded to the inner upper plate portion 21, this is not limited to this, and the upper edge portion 35 of the reinforcing longitudinal plate portion 17b may also be point-welded to the inner upper plate portion 21.

[0050] In addition, in the present embodiment, the reinforcing longitudinal plate portion 17b of the reinforcing member 17 is extended upward from the bent portion 44, but it may be extended downward from the bent portion 44. In this case, the lower edge portion of the reinforcing longitudinal plate portion 17b (the edge portion extending along the lower plate portions 22 and 25 on the opposite side from the bent portion 44) may be welded to the lower plate portion of at least one of the inner lower plate portion 22 and the outer lower plate portion 25 of the protector body 13.

[0051] In addition, in the present embodiment, the reinforcing transverse plate portion 17a of the reinforcing member 17 is arranged approximately horizontally, and the reinforcing longitudinal plate portion 17b is arranged along the vertical direction, but it is not limited to this. For example, the reinforcing member 17 of the present embodiment may be lowered and fixed to the protector body 13 in a state where it is rotated about the bent portion 44. In this case, since the bent portion 44 of the reinforcing member 17 is arranged behind the supported area 43 of the inner longitudinal plate portion 20 and extends in the front-rear direction, the strength of the RUP 10 can be ensured with a simple structure. In addition, the angle between the reinforcing transverse plate portion 17a and the reinforcing longitudinal plate portion 17b is not limited to a right angle, and may be an obtuse angle or an acute angle, for example.

[0052] In the present embodiment, the front end edge 27 of the reinforcing transverse plate portion 17a of the reinforcing member 17 is extended from the bent portion 44 side to the outside in the vehicle width direction of the outer end edge 43a in the vehicle width direction of the supported region 43 of the inner longitudinal plate portion 20, but the present invention is not limited thereto.

[0053] In addition, in the present embodiment, the front end edge 27 of the reinforcing transverse plate portion 17a of the reinforcing member 17 is welded to the inner longitudinal plate portion 20 in a linear shape, but the present invention is not limited to this, and for example, spot welding may be performed at a plurality of positions separated in the vehicle width direction. In addition, in the present embodiment, the front end edge 33 of the reinforcing longitudinal plate portion 17b of the reinforcing member 17 is welded to the inner longitudinal plate portion 20 in a linear shape, but the present invention is not limited to this, and for example, spot welding may be performed at a plurality of positions separated in the up-down direction.

[0054] In addition, in the present embodiment, the rear end edge 28 of the reinforcing transverse plate portion 17a of the reinforcing member 17 is made shorter than the front end edge 27 in the vehicle width direction, and the rear end edge 34 of the reinforcing longitudinal plate portion 17b of the reinforcing member 17 is made shorter than the front end edge 33 in the vertical direction, but the present invention is not limited thereto, and the rear end edge of at least one of the reinforcing transverse plate portion 17a and the reinforcing longitudinal plate portion 17b may be made shorter than the front end edge. Alternatively, the rear end edges of both the reinforcing transverse plate portion 17a and the reinforcing longitudinal plate portion 17b of the reinforcing member 17 may be made the same as the front end edge, or longer than the front end edge.

[0055] In addition, in the present embodiment, the front end side of the bent portion 44 of the reinforcing member 17 is brought into contact with the rear surface of the inner longitudinal plate portion 20 of the protector body 13 (in the present embodiment, the rear surface of the front plate portion 15b of the first reinforcing member 15), but the present invention is not limited thereto, and the front end side of the bent portion 44 may be brought close to the rear surface of the inner longitudinal plate portion 20. In addition, in the present embodiment, the rear end side of the bent portion 44 of the reinforcing member 17 is brought close to the front surface of the outer longitudinal plate portion 23 of the protector body 13, but the present invention is not limited thereto, and the rear end side of the bent portion 44 may be brought into contact with the front surface of the outer longitudinal plate portion 23.

[0056] In the present embodiment, the left and right first reinforcement members 15 and the left and right second reinforcement members 16 are provided on the protector inner member 18 . However, the present invention is not limited thereto and the left and right first reinforcement members 15 and the left and right second reinforcement members 16 may not be provided.

[0057] In the present embodiment, the protector body 13 is formed into a cylindrical shape by joining two members (the protector inner member 18 and the protector outer member 19). However, the present invention is not limited thereto, and the protector body 13 may be formed into a cylindrical shape by one member or three or more members.

[0058] The present invention has been described above based on the above-mentioned embodiments, but the present invention is not limited to the contents of the above-mentioned embodiments, and can be appropriately changed without departing from the scope of the present invention. That is, other embodiments, examples, and application technologies made by those skilled in the art based on the present embodiment are of course all included in the scope of the present invention.

[0059] For example, in the above-described embodiment, the underrun protector structure of the present disclosure is applied to both the RUP 10 and the FUP 50 , but the present invention is not limited thereto and may be applied to only one of the RUP 10 and the FUP 50 .

[0060] This application is based on Japanese patent application (Japanese Patent Application No. 2020-029935) filed on February 25, 2020, the contents of which are incorporated herein by reference.

[0061] Industrial Applicability

[0062] The underrun protector structure disclosed in the present invention can be widely applied to underrun protectors of various vehicles.

[0063] Description of Reference Numerals

[0064] 1: Vehicle

[0065] 3: Body frame

[0066] 10: Rear anti-drill protector (anti-drill protector)

[0067] 11: Bracket

[0068] 13: Protector body

[0069] 14: Protector internal space

[0070] 17: Strengthening components

[0071] 17a: Reinforced horizontal plate portion (first reinforcement plate portion)

[0072] 17b: Reinforced longitudinal plate portion (second reinforcement plate portion)

[0073] 20: Inner longitudinal plate

[0074] 21: Inner upper plate (protector upper plate)

[0075] 22: Inner lower plate (lower plate of protector)

[0076] 23: Outer longitudinal plate

[0077] 24: External upper plate (protector upper plate)

[0078] 25: Outer lower plate (lower plate of protector)

[0079] 27: Front edge of the reinforcing horizontal plate portion (the end edge of the inner vertical plate portion of the first reinforcing plate portion)

[0080] 33: Front end edge of the reinforcing longitudinal plate portion (end edge of the inner longitudinal plate portion side of the second reinforcing plate portion)

[0081] 35: Upper edge of the reinforcing longitudinal plate portion (end edge of the second reinforcing plate portion)

[0082] 43: Supported area

[0083] 44: The twists and turns department

[0084] 50: Front anti-drill protector (anti-drill protector)

Claims

1. An anti-drilling protector structure, which is fixed to a vehicle body frame via a bracket, extends in the vehicle width direction below an end portion of one side of the vehicle body frame in the front-rear direction, and prevents a collision object from sneaking under the vehicle body frame from the one side, characterized in that: It has a protector body and a reinforcement member. The protector body comprises: an inner longitudinal plate portion, which extends in the vehicle width direction in a state in which the one side of the bracket is erected and is fixed to the bracket; an outer longitudinal plate portion, which extends in the vehicle width direction in a state in which it is erected from the inner longitudinal plate portion to a position separated from the one side; a protector upper plate portion, which connects the upper end edges of the inner longitudinal plate portion and the outer longitudinal plate portion to each other; and a protector lower plate portion, which connects the lower end edges of the inner longitudinal plate portion and the outer longitudinal plate portion to each other, and the protector body defines a protector internal space extending in the vehicle width direction by the inner longitudinal plate portion, the outer longitudinal plate portion, the protector upper plate portion and the protector lower plate portion. The reinforcing member is formed to have a substantially L-shaped cross section having a first reinforcing plate portion and a second reinforcing plate portion, is arranged in the internal space of the protector in a state where the bent portions of the first reinforcing plate portion and the second reinforcing plate portion extend in the front-rear direction, and is fixed to the protector body. The inner vertical plate portion has a supported region supported by the bracket from the other side in the front-rear direction. The bent portion of the reinforcing member is arranged on the one side of the supported region of the inner longitudinal plate portion, and extends from a position close to or in contact with the supported region of the inner longitudinal plate portion to a position close to or in contact with the outer longitudinal plate portion. The bent portion of the reinforcing member is disposed at a position separated downward from the protector upper plate portion and separated upward from the protector lower plate portion. The first reinforcing plate portion extends outward in the vehicle width direction from the bent portion at a position separated downward from the protector upper plate portion and separated upward from the protector lower plate portion. The second reinforcing plate portion extends upward or downward from the bent portion in a manner perpendicular to the first reinforcing plate portion. The end edge portion of the first reinforcing plate portion on the inner vertical plate portion side extends from the bent portion along the inner vertical plate portion to the outer side in the vehicle width direction relative to the supported region, and is welded to the inner vertical plate portion.

2. The anti-drilling protector structure according to claim 1, characterized in that: In at least one of the first reinforcing plate portion and the second reinforcing plate portion, the length of the end edge portion on the outer vertical plate portion side is formed to be shorter than the length of the end edge portion on the inner vertical plate portion side.

3. The anti-drilling protector structure according to claim 1 or 2, characterized in that: The second reinforcing plate portion has an edge portion extending in the front-rear direction along the protector upper plate portion or the protector lower plate portion. The end edge portion of the second reinforcing plate portion is welded to the protector upper plate portion or the protector lower plate portion.

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