JP2012030798A - Grid member and vehicle front structure with the grid member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce damage to a part within a compartment even if a rear end of a bridge in a substantially horizontal state is brought into contact with the part within the compartment when an external force is applied to the bridge from a forward direction of the vehicle.SOLUTION: A front structure for a vehicle includes: a grille reinforcing member 4 allowing outside air to be introduced from a forward direction of the vehicle into a compartment; and a heat exchanger 3 disposed on a vehicle rear of the grille reinforcing member 4. The grille reinforcing member 4 is constituted of a vertical bridge 8 in which fragile parts 10B and 11B are formed at an upper part 10 and lower part 11 of the vertical bridge, respectively; and a horizontal bridge 9 crossing the vertical bridge 8. The external force F from the forward direction of the vehicle causes the vertical bridge 8 to buckle, and thereby the horizontal bridge 9 rotates to elude the external force.

Description

  The present invention relates to a lattice-shaped lattice member that is arranged in a front portion of a vehicle to introduce outside air into a compartment and intersects two crosspieces, and a vehicle front structure having the lattice member.

  For example, Patent Documents 1 and 2 disclose a front structure of an automobile having a radiator grill and a radiator disposed on the rear side of the radiator grill. Each of the radiator grilles of the cited references 1 and 2 has a structure having a vertical beam and a horizontal beam intersecting with the vertical beam. In the radiator grill of Cited Document 1, when the vehicle collides, the entire radiator grill fixed to the bumper fascia is bent and deformed in an arc shape toward the rear of the vehicle, and stress is concentrated in a plurality of slits formed in the vertical rail, thereby Is bent in the longitudinal direction of the vehicle to avoid damage to the radiator grille itself. In the radiator grill of Cited Document 2, when the vehicle collides, the upper part fixed to the vehicle body panel is made of a hard resin material, and the lower part fixed to the bumper is made of a soft resin material. The lower part is curved toward the rear of the vehicle at the boundary to avoid destruction of the radiator grille itself.

JP 11-34771 A Japanese Utility Model Publication No. 56-134216

  However, in Cited Documents 1 and 2, at the time of a vehicle collision in which the front part of the vehicle is crushed, the vertical beam of the radiator grille is pushed rearward in the substantially horizontal state, and the rear end of the beam is arranged behind it. There is a risk that an external force from the front of the vehicle will contact the parts in the engine room such as a heat exchanger and will be transmitted to the parts in the engine room through the substantially horizontal beam and damage the parts in the engine room.

  Therefore, according to the present invention, when an external force is applied from the front of the vehicle, even if the rear end portion of the crosspiece in a substantially horizontal state comes into contact with the component in the compartment, damage to the component in the compartment can be reduced. A main object is to provide a lattice member and a vehicle front structure having the lattice member.

  In the vehicle front structure according to the present invention, a lattice member that allows outside air from the front of the vehicle to pass through the compartment is formed by a first cross and a second cross that intersects the first cross, and an external force from the front of the vehicle is formed. Thus, either one of the first bar and the second bar is buckled and the other is rotated.

  According to the vehicle front structure of the present invention, when an external force is applied from the front of the vehicle, either one of the first beam and the second beam is buckled and the other is rotated in a substantially horizontal state. Even if the rear end of the crosspiece abuts against the compartment internal part, the external force from the front of the vehicle can be passed, thereby reducing damage to the compartment internal part.

It is a disassembled perspective view of a vehicle front structure, showing the first embodiment. 1 is a front view of a vehicle front structure according to a first embodiment. 1 is a plan view of a vehicle front structure according to a first embodiment. It is a principal part expanded sectional view of a vehicle front part structure which shows 1st Embodiment. It is a figure which shows 1st Embodiment and shows the attachment state of the grill reinforcement member to a fascia. It is a principal part expansion perspective view which shows 1st Embodiment and shows the attachment state of the grill reinforcement member to a fascia. It is a rear view of the fascia which showed 1st Embodiment and formed the rib in the weak part. It is a perspective view of a grill reinforcement member which shows a 1st embodiment. It is a front view of the state which showed 1st Embodiment and has arrange | positioned the grill reinforcement member on the both sides of an ornament support member. It is a figure which shows a 1st Embodiment and shows a mode that the vertical rail part of a grill reinforcement member inclines outward of a vehicle, and deform | transforms this grill reinforcement member outward of a vehicle. FIG. 3 is a perspective view of an ornament support member according to the first embodiment. It is a principal part expansion perspective view which shows 1st Embodiment and takes out and shows a vertical crosspiece part. It is a principal part expanded side view of a grill reinforcement member which shows 1st Embodiment. It is an operation | movement figure which shows 1st Embodiment and shows a mode that a grill reinforcement member is crushed by a collision. It is a figure which shows 1st Embodiment and shows the direction of the force added to a grille reinforcement member at the time of a collision. It is a figure which shows 1st Embodiment and shows that a part of vertical beam part bends at the time of a collision. The main part expansion side view of the grill reinforcing member which shows a 2nd embodiment and made the front part of a vertical rail upper part into a weak part, the rear is a high strength part, the front part of the vertical rail lower part is a high strength part, and the rear is a weak part. It is. In the second embodiment, the front of the vehicle at the upper part of the vertical beam is a high strength part, the rear is a weak part, the front of the vehicle at the lower part of the vertical beam is a weak part, the rear is a high strength part, and the areas of the weak part and the high strength part are It is a principal part expanded side view of the grill reinforcing member made the same. It is a principal part expanded side view of the grill reinforcement member which shows 2nd Embodiment and formed the through-hole in the vertical beam upper part and the vertical beam lower part, and was made into the weak part. It is an operation | movement figure which shows 3rd Embodiment and shows a mode that a grill reinforcement member is crushed by a collision. The main part enlarged side view of the grill reinforcement member which shows 4th Embodiment and made the vehicle front of the upper part of a vertical beam into a weak part, the back is a high intensity part, the vehicle front of the lower part of a vertical beam is a high intensity part, and the rear is a weak part. It is. It is an operation | movement figure which shows a 4th Embodiment and shows a mode that a grill reinforcement member is crushed by a collision. It is a principal part expanded side view of the grill reinforcing member which showed 5th Embodiment and made the horizontal rail diagonal. It is an operation | movement figure which shows a 5th Embodiment and shows a mode that a grille reinforcement member is crushed by a collision.

  Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings.

“First Embodiment”
1 to 16 are views relating to a vehicle front structure according to the first embodiment. First, the configuration of the vehicle front structure will be described in detail with reference to the drawings.

  As shown in FIG. 1 to FIG. 4, the vehicle front part structure includes a grill part 2 for introducing outside air formed in a fascia 1 as a support member, and a compartment internal part ( A heat exchanger 3 such as a condenser 3A or a radiator 3B, which is an engine room component), and a grill reinforcing member 4 which is a lattice member disposed in the vicinity of the grill portion 2 and in front of the heat exchanger 3. Configured. The grill portion 2 and the grill reinforcing member 4 function as an outside air introduction portion that allows outside air from the front of the vehicle to pass through the compartment.

  The fascia 1 is formed so as to cover vehicle body components including a bumper reinforcement (not shown) disposed on the front side of an engine room that is a compartment in which the engine is mounted. The fascia 1 extends in the vehicle width direction so as to cover the bumper reinforcement, and is a bumper portion 17 that protrudes forward of the vehicle, and the grill portion 2 formed at an upper central portion thereof. And a lamp disposition portion 16 cut out to accommodate the lamps at both outer ends of the grill portion 2.

  In the grill portion 2, an ornament support portion 5 that supports an ornament member 23 disposed in the center portion is formed. And this grill part 2 is formed so that the center ornament support part 5 may be pinched | interposed in a vehicle width direction. The grill portion 2 is formed in a lattice shape with the vertical beam 2A and the horizontal beam 2B, and functions as an outside air introduction port for introducing outside air into the compartment.

  The heat exchanger 3 is fixed to the radiator core 6 in the order of the condenser 3A and the radiator 3B from the front to the rear of the vehicle. Further, in front of the heat exchanger 3, the grill portions 2 for supplying outside air to the heat exchanger 3 are provided correspondingly.

  In addition to the heat exchanger 3, an air guide member 7 for efficiently guiding the outside air introduced from the grill portion 2 to the heat exchanger 3 is attached to the radiator core 6. The air guide members 7 are attached to both sides of the heat exchanger 3 in the vehicle width direction, and are provided on the same extension as the outer surface of the grill reinforcing member 4 to be described later, so that outside air leaks to parts other than the heat exchanger 3. To suppress that.

  As shown in FIGS. 5 to 7, the grill reinforcing member 4 is separately attached to the rear surface (back surface) 1 a of the fascia 1 facing the grill portion 2 as a separate component from the fascia 1. Hereinafter, for the sake of convenience, the grill reinforcing member 4 disposed on the right side of the vehicle with the ornament support portion 5 interposed therebetween is referred to as a right grill reinforcing member, and the grill reinforcing member 4 disposed on the left side of the vehicle is referred to as a left grill reinforcing member.

  As shown in FIGS. 8 and 9, the grill reinforcing member 4 includes a vertical beam (first beam) 8 and a horizontal beam (second beam) 9, both of the right side grill reinforcing member and the left side grill reinforcing member. And is formed as a rectangular body having substantially the same shape as the outer shape of the grill portion 2. The vertical beam 8 and the horizontal beam 9 of the grill reinforcing member 4 are provided at positions corresponding to the vertical beam 2A and the horizontal beam 2B of the grill part 2, and guides the outside air introduced from the grill part 2 into the compartment. . The vertical beam 8 and the horizontal beam 9 are formed so as to cross each other. Specifically, the horizontal beam 9 is formed substantially horizontally in the vehicle width direction, while the vertical beam 8 is formed so as to connect the horizontal beams 9 provided above and below, and the upper side is horizontally formed. It is inclined with respect to the crosspiece 9 toward the outside of the vehicle.

  The grill reinforcing member 4 has a rotation promoting means for buckling one of the vertical beam 8 and the horizontal beam 9 and rotating the other when an external force is applied to the fascia 1 from the front of the vehicle. ing. As shown in FIGS. 12 and 13, the rotation facilitating means includes a vertical beam upper portion (cross beam upper portion) 10 having a high strength portion 10A on the front side and a fragile portion 10B on the rear side in the vehicle longitudinal direction, and the vertical beam upper portion. This is a vertical beam structure (bar structure) including a vertical beam lower part (bar lower part) 11 having a fragile part 11B on the opposite side (front side) and a high strength part 11A on the rear side. The vertical beam upper portion 10 and the vertical beam lower portion 11 are each substantially trapezoidal in a plan view that gradually increases in thickness from one to the other in the vehicle longitudinal direction when viewed from the direction of arrow A in FIG. The arrangement positions are inverted 180 degrees on the boundary lines.

  The high-strength portions 10A and 11A are thick portions that are thicker than the weak portions 10B and 11B. In contrast, the fragile portions 10B and 11B are thin-walled portions that are thinner than the high-strength portions 10A and 11A. Thereby, in the vertical beam upper part 10, when an external force is applied, the weakened part 10B having a small thickness on the rear side of the vehicle is more likely to buckle than the high-strength part 10A on the front side of the vehicle. In the vertical beam lower portion 11, contrary to the vertical beam upper portion 10, the weakened portion 11 </ b> B having a small thickness on the vehicle front side is more likely to buckle than the high-strength portion 11 </ b> A on the vehicle rear side.

  Further, in this rotation promoting means, in order to further promote the rotation of the vertical beam 8, a wall thickness boundary formed between the vertical beam upper part 10 and the vertical beam lower part 11 having different thickness structures as described above. The portion 12 is formed such that the areas of the fragile portions 10B and 11B are larger than those of the high-strength portions 10A and 11A. That is, in the first embodiment, the thick boundary portion 12 is formed so as to be inclined downwardly, and the weak portion 10B that is the rear side of the vertical beam upper portion 10 and the weak surface that is the front side of the vertical beam lower portion 11 are formed. The area of the part 11B is increased.

  The grill reinforcing member 4 is formed so as to gradually protrude forward from the upper side toward the lower side in the vehicle height direction. That is, in the first embodiment, the horizontal beam 9 formed below the horizontal beam 9 formed on the upper side is disposed in front of the vehicle.

  And this grill reinforcement member 4 is provided with four support parts 13A-13D supported by the fascia 1 (refer FIG. 6). 13 A of 1st support parts are provided in the uppermost crosspiece 9 of a vehicle height direction, and are attached to the upper part of the fascia 1 with the 1st screw 14A which is a fastening means. The second support portion 13B is provided on the outermost vertical beam 8 of the grill reinforcing member 4, and is attached to a rib 15 formed on the rear surface 1a of the fascia 1 with a second screw 14B.

  The rib 15 is provided between the grill portion 2 of the fascia 1 and the lamp placement portion 16 at a portion that becomes a boundary with the bumper portion 17. This portion is a portion where stress is concentrated in a cantilever state with the bumper portion 17 as a fixed end because the grill portion 2 is formed in a lattice shape, and also functions as a reinforcing rib of the portion. Further, the rib 15 is formed so as to protrude from the rear surface 1a of the fascia 1 to the rear of the vehicle so as to be continuous with the horizontal beam 2B of the grill portion 2 or the horizontal beam 9 of the grill reinforcing member 4. The function has been improved.

  The third support portion 13C and the fourth support member 13D are provided on the innermost vertical beam 8 of the grill reinforcing member 4, and are attached to the rear surface 1a of the fascia 1 with the third screw 14C or the fourth screw 14D. The third support portion 13C is formed to extend in the vehicle width direction from the uppermost horizontal rail 9 of the grill reinforcing member 4, and the fourth support portion 13D is similarly extended from the lowermost horizontal rail 9 in the vehicle width direction. It is formed to extend.

  The grill reinforcing member 4 configured as described above has the first support portion 13A and the second support portion 13B attached to the fascia 1 with the first screw 14A and the second screw 14B, and the third support portion 13C and the second support portion 13B. The four support portions 13D are fastened together with the ornament support portion 5 and the ornament member 23 of the fascia 1 with the third screw 14C and the fourth screw 14D.

  As shown in FIG. 11, the ornament member 23 has a plurality of ridges 19 extending in the vehicle width direction extending in the vehicle front-rear direction so as to protect a sensor or the like disposed behind the ornament member 23. To increase rigidity. In addition, screw attachment portions 20 for fastening together with the fascia 1 and the grill reinforcing member 4 are provided at the four corners of the ornament member 23.

  Next, the behavior of the grill reinforcing member 4 when an external force is applied to the vehicle front structure from the front of the vehicle will be described. In the vehicle front structure of the present embodiment, as shown in FIG. 14A, when an external force F is applied from the front of the vehicle to the bumper portion 17 that protrudes most of the vehicle and is disposed below the grill reinforcing member 4, the fascia 1 is deformed, and the grill reinforcing member 4 rotates downward as indicated by an arrow B in FIG.

  Then, after the grill reinforcing member 4 is rotated by the external force F, as shown in FIG. 14B, the support portions 13A to 13D are broken and moved to the inside of the compartment. At this time, when the grill reinforcing member 4 as a whole is rotated, the substantially horizontal crosspiece 9 is tilted forward and downward.

  Next, the grill reinforcing member 4 is sandwiched between the fascia 1 and the heat exchanger 3, and as shown in FIG. 14C, the rear end portion 9A of the horizontal beam 9 is moved upward to the horizontal beam 9. A rotation moment M in the direction to be applied is applied, and the space between the upper and lower horizontal beams 9 is narrowed, and a force is applied to compress the vertical beam 8 in the vertical direction (the vertical direction before the grille reinforcing member 4 is rotated). This compressive force causes the fragile portions 10B and 11B of the vertical beam 8 to buckle before the high-strength portions 10A and 11A, thereby further promoting the rotation in the direction in which the rear end portion 9A of the horizontal beam 9 is moved upward.

  Further, since the ground contact portion (the wavy line portion in FIG. 16) between the fragile portions 10B and 11B of the vertical beam 8 and the horizontal beam 9 has a smaller ground contact area than the ground contact portion between the high-strength portions 10A and 11A and the horizontal beam 9, peeling occurs. It's easy to do. As the ground contact portion between the fragile portions 10B and 11B and the horizontal beam 9 is peeled off, the fragile portions 10B and 11B of the vertical beam 8 are more likely to buckle and move the rear end 9A of the horizontal beam 9 upward. Further promote the rotation.

  Finally, as shown in FIG. 14D, the high-strength portions 10A and 11A also buckle while absorbing energy from the external force F. The horizontal beam 9 which has been substantially horizontal due to the buckling of the vertical beam 8 is rotated so as to reduce the front-rear width of the grill reinforcing member 4, and the horizontal beam 9 remains in a substantially horizontal state and the rear end 9 </ b> A is heated. Even if it comes into contact with the exchanger 3, it can receive external force from the front of the vehicle. That is, the horizontal rail 9 is rotated by a rotational moment generated when it is sandwiched between the fascia 1 and the heat exchanger 3, and the external force F from the front of the vehicle is directly transmitted to the heat exchanger 3 by the rotation. And the external force F is received. Therefore, damage to the heat exchanger 3 due to the grill reinforcing member 4 can be reduced.

  According to the vehicle front structure configured as described above, the vertical beam 8 can be buckled and the horizontal beam 9 can be rotated when an external force is applied from the front of the vehicle. Even if the part 9A abuts against the heat exchanger 3 that is a component in the compartment, it is possible to receive external force from the front of the vehicle, thereby reducing damage to the component in the compartment.

  Further, according to the vehicle front structure of the present embodiment, the grill reinforcing member 4 is arranged in the vicinity of the grill portion 2 and in front of the compartment internal components, so that the components in the compartment (the condenser 3A and the radiator 3B) are separated from the grill portion 2. Etc.) and the appearance from the front of the vehicle can be improved.

  Further, according to the vehicle front structure of the present embodiment, when the external force F is applied from the front of the vehicle, the fragile portions 10B and 11B of the vertical beam upper portion 10 and the vertical beam lower portion 11 are ahead of the high strength portions 10A and 11A. By buckling, the rotation of the horizontal rail 9 can be promoted.

  Moreover, according to the vehicle front part structure of this embodiment, since the area of weak part 10B, 11B is made larger than high intensity | strength part 10A, 11A by the thickness boundary part 12, the vertical beam upper part 10 and the vertical beam lower part 11 becomes easy to buckle, and rotation of the crosspiece 9 can be promoted.

  Further, according to the vehicle front structure of the present embodiment, the bumper portion 17 that protrudes most forward of the vehicle in the fascia 1 is provided below the grill reinforcing member 4, so that external force is applied from the front of the vehicle. When the external force is input to the bumper portion 17 before the grill reinforcing member 4, the entire fascia 1 rotates about the upper side, and the grill reinforcing member 4 also rotates accordingly, and the horizontal rail 9. Further rotation of the rear end portion 9A in the direction of moving the rear end portion 9A is further promoted.

  Further, according to the vehicle front structure of the present embodiment, since the vertical bars 8 of the left and right grille reinforcing members 4 are both inclined toward the outside of the vehicle, the grille reinforcing member 4 extends to the outside of the vehicle. It is possible to promote deformation. Accordingly, both the left and right grille reinforcing members 4 are deformed inward, so that it is possible to prevent mutual deformation from being suppressed.

  Further, according to the vehicle front structure of the present embodiment, the grill reinforcing member 4 formed separately from the fascia 1 is disposed on the rear surface of the grill portion 2, so that the components in the compartment are difficult to see from the grill portion 2. .

  Further, according to the vehicle front structure of the present embodiment, the ornament member 23 formed with high strength, the ornament support portion 5 of the fascia 1, and the grill reinforcing member 4 are fastened together with a screw as a fastening means. The rigidity in the direction can be further increased.

  Further, according to the grill reinforcing member 4 of the present embodiment, when the external force F is applied from the front of the vehicle, the fragile portions 10B and 11B of the vertical beam upper portion 10 and the vertical beam lower portion 11 are ahead of the high strength portions 10A and 11A. By buckling, the rotation of the horizontal rail 9 can be promoted.

  Further, according to the grill reinforcing member 4 of the present embodiment, the areas of the fragile portions 10B and 11B are made larger than the high-strength portions 10A and 11A by the thickness boundary portion 12, so that the vertical beam upper portion 10 and the vertical beam lower portion 11 becomes easy to buckle, and rotation of the crosspiece 9 can be promoted.

  In this embodiment, the projecting portion 17 of the fascia 1 that is the most projecting of the vehicle is provided on the lower side of the grill reinforcing member 4, but the same effect can be obtained by providing the projecting portion 17 on the upper side of the grill reinforcing member 4. Can be obtained.

“Second Embodiment”
17 to 19 are diagrams showing a second embodiment. As shown in FIG. 17, in the second embodiment, contrary to the first embodiment, the front side in the vehicle direction of the vertical beam upper part 10 is a weak part 10B and the rear side is a high-strength part 10A. The front side of 11 is a high-strength part 11A, and the rear side is a weak part 11B. Even with such a vertical beam structure, the same effects as those of the first embodiment can be obtained.

  Moreover, as shown in FIG. 18, the thickness boundary part 12 is good also as horizontal. Although the degree of deformation is somewhat reduced as compared to the case where the areas of the fragile portions 10B and 11B are formed obliquely so as to be larger than the high-strength portions 10A and 11A as in the first embodiment, the effect of the present invention is also reduced with this configuration. We can put out enough.

  In addition, as shown in FIG. 19, the weakened portions 10B and 11B are not made thinner and less rigid than the high-strength portions 10A and 11A. It is good also as weak part 10B, 11B by forming in the upper part 10 and the vertical rail lower part 11. In this case, the vertical beam upper portion 10 and the vertical beam lower portion 11 have the same thickness from the front to the rear in the vehicle longitudinal direction.

“Third Embodiment”
FIG. 20 is a diagram showing a third embodiment. In the third embodiment, the support portions 13A and 13B of the grill reinforcing member 4 are provided only on the upper side, and the protruding portion 17 is not provided on the fascia 1, but the support portion 13A of the grill reinforcing member 4 is not provided. A portion that protrudes to the front of the lower vehicle is a protruding portion 21. The other configuration is the same as that of the grill reinforcing member 4 of the first embodiment.

  In this embodiment, as shown in FIG. 20 (A), when an external force F directly acts on the protruding portion 21 on the lower end side of the grill reinforcing member 4, grill reinforcement is performed around the first support portion 13A and the second support portion 13B. The member 4 rotates downward as indicated by an arrow B in FIG. As in the first embodiment, the grill reinforcing member 4 breaks the first support portion 13A and the second support portion 13B and moves inward of the compartment as shown in FIG. The whole 4 rotates and the horizontal rail 9 falls forward. Further, in FIG. 20C, the vertical beam 8 is crushed and buckled, so that a rotational moment M is applied to the horizontal beam 9, and the horizontal beam 9 rotates by the rotational moment M. Then, as shown in FIG. 20D, the grill reinforcing member 4 finally rotates so as to reduce the front-rear width, the horizontal rail 9 remains substantially horizontal, and the rear end 9A exchanges heat. Even if it comes into contact with the vessel 3, the external force F from the front of the vehicle is received. Therefore, damage to the heat exchanger 3 due to the grill reinforcing member 4 can be reduced.

“Fourth Embodiment”
21 and 22 show the fourth embodiment. The fourth embodiment is different from the first embodiment in that the support portions 13A and 13B of the grill reinforcing member 4 are provided only on the lower side, and the protruding portion 17 is not provided on the fascia 1, but the grill reinforcing member The upper side where the four support portions 13A are not provided is projected forward of the vehicle, and the projected portion is defined as a protruding portion 22. Moreover, in 4th Embodiment, unlike the 1st and 3rd embodiment, as shown in FIG. 21, the weak part 10B of the vertical beam upper part 10 is on the vehicle front side, and the high strength part 10A is on the rear side. The weakened part 11B of the vertical beam lower part 11 is on the vehicle rear side, and the high-strength part 11A is on the front side.

  In this embodiment, as shown in FIG. 22A, when an external force F acts directly on the protrusion 22 on the upper end side of the grill reinforcing member 4, the first support portion 13A provided on the lower end side of the grill reinforcing member 4 is used. And the grill reinforcing member 4 rotates upward as shown by the arrow B in the figure with the second support portion 13B as the center. As in the first embodiment, the grill reinforcing member 4 breaks the first support portion 13A and the second support portion 13B and moves inward of the compartment as shown in FIG. The whole 4 rotates and the crosspiece 9 rises forward. Further, in FIG. 22C, the vertical beam 8 is crushed and buckled, so that a rotation moment M is applied to the horizontal beam 9, and the horizontal beam 9 is rotated by the rotation moment M. Then, as shown in FIG. 22 (D), the grill reinforcing member 4 finally rotates so as to reduce the front-rear width, the horizontal rail 9 remains substantially horizontal, and the rear end 9A exchanges heat. Even if it comes into contact with the vessel 3, the external force F from the front of the vehicle is received. Therefore, damage to the heat exchanger 3 due to the grill reinforcing member 4 can be reduced.

“Fifth Embodiment”
23 and 24 are views showing a fifth embodiment. Unlike the first, third, and fourth embodiments in which the horizontal rail 9 is horizontal, the fifth embodiment uses an external force from the front of the vehicle by using the grill reinforcing member 4 having the horizontal rail 9 inclined. When F acts, this is an example in which the horizontal beam 9 is rotated by buckling the vertical beam 8 without rotating the entire grill reinforcing member.

  In the fifth embodiment, as shown in FIG. 23, a grill reinforcing member 4 is used in which the horizontal rail 9 is inclined downward in the front of the vehicle and the front end 9B and the rear end 9A of the horizontal rail 9 are aligned. In this grill reinforcing member 4, the fragile portion 10B of the vertical beam upper portion 10 is on the vehicle rear side, the high strength portion 10A is on the front side, the fragile portion 11B of the vertical beam lower portion 11 is on the vehicle front side, and the high strength portion 11A is on the rear side. Yes. Moreover, the ratio of the area which the weak parts 10B and 11B and the high intensity | strength parts 10A and 11A occupy with respect to the vertical beam 8 is made the same.

  In this embodiment, as shown in FIG. 24A, support portions 13A and 13B are provided at the upper end portion and the lower end portion of the grill reinforcing member 4, respectively, and the support portions 13A and 13B are fixed to the vehicle body. When an external force F is directly applied to the grill reinforcing member 4 from the front of the vehicle, the front end 9B of the cross rail 9 is on the same plane in the vertical direction, and therefore, as shown in FIG. The 2nd support part 13B is fractured | ruptured, and the grill reinforcement member 4 moves in the compartment inward horizontally as it is. Then, in FIG. 24C, the vertical beam 8 is crushed and buckled, whereby a rotational moment M is applied to the horizontal beam 9, and the horizontal beam 9 is rotated by the rotational moment M. As shown in FIG. 24D, the grill reinforcing member 4 finally rotates so as to reduce the front-rear width, the horizontal rail 9 remains substantially horizontal, and the rear end 9A exchanges heat. Even if it comes into contact with the vessel 3, the external force F from the front of the vehicle is received. Therefore, damage to the heat exchanger 3 due to the grill reinforcing member 4 can be reduced.

“Sixth Embodiment”
In the sixth embodiment, the lattice structure including the vertical bars 8 and the horizontal bars 9 of the grill reinforcing member 4 in the first to fifth embodiments described above is applied to the grill portion 2 formed in the fascia 1. Good. By adopting the above-described vertical beam structure of the grill reinforcing member 4 in the grill portion 2, the same effects as those of the first to fifth embodiments can be exhibited.

  INDUSTRIAL APPLICABILITY The present invention can be used for a lattice member arranged at the front portion of a vehicle and a vehicle front structure having the lattice member for introducing outside air into the compartment.

1 ... Facia (supporting member)
2… Grill part (outside air introduction part)
3 ... Heat exchanger 3A ... Condenser (parts in the compartment)
3B ... Radiator (parts in the compartment)
4. Grill reinforcement member (lattice member, outside air introduction part)
5. Ornament support (central member)
7 ... Air guide member 8 ... Vertical beam (first beam)
9 ... Horizontal pier (second pier)
10 ... Upper part of the vertical beam (upper part)
11 ... Vertical lower part (lower part)
10A, 11A ... High strength part 10B, 11B ... Fragile part 12 ... Thickness boundary part 13 ... Supporting part 14 ... Screw (fastening means)
17, 22 ... Projection 23 ... Ornament member

Claims (11)

A lattice member for passing outside air from the front of the vehicle into the compartment;
Compartment internal parts arranged on the vehicle rear side of the lattice member;
A vehicle front structure comprising:
The lattice member includes a first bar and a second bar that intersects the first bar, and one of the first bar and the second bar is generated by an external force from the front of the vehicle. The vehicle front structure characterized in that the other side is buckled and the other is rotated. A lattice member for passing outside air from the front of the vehicle into the compartment;
Compartment internal parts arranged on the vehicle rear side of the lattice member;
A vehicle front structure comprising:
The lattice member includes a first bar and a second bar that intersects with the first bar, and one of the first bar and the second bar includes a fragile portion. The upper part of the rail having the high strength part thicker than the weak part and having the weak part or the high strength part on either the front side or the rear side in the longitudinal direction of the vehicle, and also having the weak part and the high strength part. And the lower part of the rail provided with the weak part on the opposite side to the weak part of the upper part of the rail,
When the lattice member receives an external force from the front of the vehicle and interferes with the components in the compartment, either the first crosspiece or the second crosspiece is set so that the fragile portion precedes the high-strength portion. A vehicle front structure characterized in that it buckles and rotates the other. The vehicle front structure according to claim 2,
Of the boundary between the top of the crosspiece and the bottom of the crosspiece, a portion where the thickness of the top of the crosspiece and the bottom of the crosspiece is the same as the thickness boundary portion, and the portion before and after the thickness boundary portion is a fragile portion And the high-strength portion, and the fragile portion and the high-strength portion when viewed from the side, the side area is formed so that the fragile portion is larger than the high-strength portion. Part structure. The vehicle front structure according to any one of claims 1 to 3,
The lattice member is attached to a support member;
The support member has a protruding portion that protrudes forward of the vehicle on either one of the upper and lower sides of the lattice member. The vehicle front structure according to any one of claims 1 to 3,
The lattice member has a protruding portion that is attached to the supporting member at a support portion provided on either one of the upper and lower sides of the lattice member and protrudes the other side where the supporting portion is not provided to the front of the vehicle. A vehicle front structure characterized by The vehicle front structure according to any one of claims 1 to 5,
The first crosspiece is a vertical crosspiece buckled by an external force from the front of the vehicle,
The second beam is a horizontal beam intersecting with the vertical beam,
Two lattice members, a left lattice member arranged on the left side of the vehicle and a right lattice member arranged on the right side of the vehicle, are arranged in parallel in the vehicle width direction,
The vehicle front part structure characterized in that the vertical beam is provided with an upper portion inclined to the vehicle outer side with respect to the lower portion in the vehicle width direction with respect to the horizontal beam. The vehicle front part structure according to claim 6, wherein the vehicle front structure according to claim 4, 5 or claim 4, 5 is cited.
The vehicle front part structure, wherein the lattice member is arranged on a rear surface of an outside air introduction portion arranged in front of the vehicle, and is formed separately from the support member having the outside air introduction portion. The vehicle front portion structure according to claim 7, wherein the vehicle front portion structure refers to claim 6 or claim 6.
A central member formed with a strength higher than that of the lattice member is disposed at a central portion of the left and right lattice members, and the central member, the support member, and the lattice member are fastened together by fastening means. Vehicle front structure. A first beam and a second beam intersecting the first beam;
A lattice member, wherein one of the first bar and the second bar is buckled by an external force from the front, and the other is rotated. A first beam and a second beam intersecting the first beam; by external force from the front, buckling one of the first beam and the second beam; The other is a rotating lattice member,
One of the first beam and the second beam that buckles due to an external force from the front has a fragile part and a high-strength part that is thicker than the fragile part, and the front side in the vehicle longitudinal direction Or a crosspiece provided with a fragile part or a high strength part on either one of the rear side, and a crosspiece having a fragile part and a high strength part and provided with a fragile part on the opposite side to the fragile part of the top of the crosspiece The bottom, and
When the lattice member receives an external force from the front of the vehicle and interferes with a component in the compartment, either the first crosspiece or the second crosspiece is placed before the high-strength portion. A lattice member characterized by buckling and rotating the other. The lattice member according to claim 9 or 10,
A lattice member, wherein the lattice member is disposed on a rear surface of a lattice-shaped outside air introduction portion that is disposed in front of the vehicle and introduces outside air.

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