JP4434096B2 - Bumper structure - Google Patents

Description

  The present invention relates to a bumper structure having an impact absorbing structure.

  Conventionally, as a bumper structure provided with a structure for protecting pedestrians, there is one disclosed in Patent Document 1.

In this structure, bumper reinforcements arranged along the vehicle width direction are attached to the front end portions of the left and right front side frames extending in the longitudinal direction of the vehicle. In this bumper reinforcement, projecting members arranged along the vehicle width direction on the lower front side of the bumper reinforcement are provided via a main bracket provided at both ends of the bumper reinforcement and a sub bracket provided therebetween. Installed. Thus, when the vehicle and the pedestrian collide, the protruding member hits the pedestrian's shin and pays the foot.
JP-A-11-215063

  However, in this conventional bumper structure, the object to be collided first hits the protruding member provided on the front lower side of the bumper reinforcement. Therefore, the main bracket and the sub bracket extending from the bumper reinforcement to the lower front side of the vehicle receive a moment from the protruding member (reinforcing member). Therefore, the main bracket and the sub bracket are made strong parts in order to suppress deformation due to this moment, the weight of the main bracket (reinforcing member) and the sub bracket (reinforcing member) is increased, and the conventional bumper structure is heavy. It has a bumper structure.

  In consideration of the above facts, the present invention provides a bumper structure that takes into account the impact with a low-strength collision object such as a pedestrian or a bicycle, and can minimize the weight of a reinforcing member. Is the purpose.

The bumper structure according to claim 1 of the present invention has a bumper reinforcement arranged along the vehicle width direction at the rear of the bumper cover, and an upper portion in contact with the front wall of the bumper reinforcement facing the front of the vehicle, and The bumper cover is attached to the bumper reinforcement at a fixed portion provided at a predetermined distance in the vehicle vertical direction on the abutting surface thereof, and extends downward from the bumper reinforcement, and the bumper cover at the lower end thereof. And a support portion protruding forward of the vehicle at an intermediate portion between the lower end portion and the contact portion with the bumper reinforcement extends in the vehicle vertical direction when viewed from the side of the vehicle . And a reinforcing member that supports the force received by the bumper cover with the support portion.

  According to the above configuration, when the vehicle and the collision object collide, the reinforcing member extending downward from the bumper reinforcement supports the bumper cover that contacts the collision object.

Here, the reinforcing member is provided with a support portion projecting forward of the vehicle in the intermediate portion between the lower end portion and the bumper reinforcement of the reinforcing member, the support portion extends in the vehicle vertical direction as viewed from the side of the vehicle. Thereby, at the time of a collision with a collision body, this support part mainly supports the collision load via the bumper cover. For this reason, the moment acting on the reinforcing member is reduced, it is not necessary to increase the strength of the reinforcing member, and an increase in weight due to the reinforcing member is minimized. In addition, the support part should just protrude the intermediate part of the reinforcement member ahead of the vehicle, and in addition to this, the lower end part or the upper end part may protrude forward. Further, according to the above configuration, the reinforcing member has an upper portion extending in the vertical direction of the vehicle and abutting against the front wall of the bumper reinforcement, and a fixed portion provided at a predetermined distance in the vertical direction of the vehicle on the abutting surface. It is attached to the bumper reinforcement. For this reason, the reinforcing member is fixed to the front wall of the bumper reinforcement at a position where the length of the moment arm is sufficiently taken from the lower end of the contact part to the bumper reinforcement, and the moment at the time of collision (the rotation of the reinforcing member) Load) is reliably supported by the front wall of the bumper reinforcement.

The bumper structure according to a second aspect of the present invention is the bumper structure according to the first aspect, wherein the reinforcing member is inclined to the rear side of the vehicle toward the upper side of the vehicle continuously to the upper end of the support portion and on the upper end of the reinforcing member. It is characterized by having an upper hypotenuse .

According to the above configuration, the upper oblique side portion of the reinforcing member is continuously inclined from the upper end of the support portion toward the upper side of the vehicle toward the rear side of the vehicle and reaches the upper end of the reinforcing member. Sometimes, the collision load received by the support part via the bumper cover is easily transmitted from the support part side to the bumper reinforcement side, and, for example, a part protruding forward of the vehicle to the upper end part side of the reinforcing member in addition to the support part The weight of the reinforcing member can be reduced as compared with the structure including the above.

  A bumper structure according to a third aspect of the present invention is the bumper structure according to the first or second aspect, wherein the reinforcing member includes a support plate extending in the vehicle front-rear direction, and the force received by the bumper cover at the time of a vehicle collision is applied to the reinforcing member. The support plate supports.

  According to the above configuration, the force received by the bumper cover at the time of collision with the collision object acts on the support plate provided in the reinforcing member in the vehicle front-rear direction. The bending rigidity is high.

  A bumper structure according to a fourth aspect of the present invention is the bumper structure according to the third aspect, wherein the reinforcing member having the support plate extending in the vehicle front-rear direction is an attachment surface attached to the bumper reinforcement and in the vehicle width direction. An extending fixing plate is provided, and the plate surface of the support plate and the plate surface of the fixing plate are arranged in an intersecting direction.

  According to the said structure, the force which the bumper cover received at the time of a collision with a collision body acts on the support plate with which the reinforcement member was equipped, and is transmitted to a bumper reinforcement via a fixed plate. Since the reinforcing member has a high rigidity because the support plate and the fixed plate are arranged in the crossing direction, the force received is reliably transmitted to the bumper reinforcement, and the bumper reinforcement surely supports this force.

  A bumper structure according to a fifth aspect of the present invention is the bumper structure according to any one of the first to fourth aspects, wherein the bumper cover is disposed along an opening extending in a vehicle width direction and a vehicle vertical direction, While partitioning the opening in the vehicle width direction, and in the event of a vehicle collision, the vertical partition plate supported by the support portion of the reinforcing member and the vehicle width direction are arranged, and the opening is partitioned in the vehicle vertical direction, A horizontal partition plate that is connected to the vertical partition plate at an intersection with the vertical partition plate and has a front end portion provided in front of the vehicle with respect to the vertical partition plate.

  According to the above configuration, at the time of collision with the collision body, the horizontal partition plate is deformed and supported by the vertical partition plate, and the vertical partition plate is supported by the support portion of the reinforcing member. Thereby, since a horizontal partition plate deform | transforms and absorbs a collision load, the moment which acts on a reinforcement member is reduced.

  A bumper structure according to a sixth aspect of the present invention is the bumper structure according to the fifth aspect, wherein a lower edge of the opening provided in the bumper cover is a lower plate, and the lower plate is opened at the rear of the vehicle and forward of the vehicle. An upper surface and a lower surface connected by a portion, a rear end portion of the lower surface is a lowermost portion of the bumper cover, the upper surface is supported by the vertical partition plate, and a front end portion Is arranged in front of the vehicle with respect to the vertical partition plate.

  According to the said structure, since the downward surface of a lower board is the lowest part of a bumper cover, it is attached to the lower end part of a reinforcement member. Moreover, the upward surface of the lower plate is supported by a support portion via a vertical partition plate. Thereby, at the time of collision with the collision body, the lower plate can be deformed to absorb the collision load, so that the moment acting on the reinforcing member is further reduced.

  A bumper structure according to a seventh aspect of the present invention is the bumper structure according to any one of the first to fourth aspects, wherein the bumper cover is provided between the opening provided in the bumper cover and extending in the vehicle width direction and the reinforcing member. A collision absorbing member that is deformed and absorbs a collision load when the vehicle collides is provided.

  According to the above configuration, the collision absorbing member is deformed and absorbs the collision load at the time of collision with the collision object, so that the moment acting on the reinforcing member is reduced.

  The bumper structure according to an eighth aspect of the present invention is the bumper structure according to the seventh aspect, wherein the collision absorbing member corresponds to a vehicle rear of an edge portion of the opening provided in the bumper cover, and a collision load from the bumper cover. It is characterized by receiving.

  According to the above configuration, since the collision absorbing member corresponds to the edge of the opening provided in the bumper cover that extends rearward of the vehicle, the periphery of the opening of the bumper cover has high rigidity.

  Thereby, at the time of collision with the collision object, the periphery of the opening of the bumper cover is deformed, and further, the collision absorbing member is deformed to absorb the collision load, so that the moment acting on the reinforcing member is further reduced.

  According to the first aspect of the present invention, the weight of the reinforcing member can be minimized while considering the collision with the collision body.

According to a second aspect of the present invention, in the bumper structure according to the first aspect, the upper oblique side portion of the reinforcing member is continuously inclined from the upper end of the support portion toward the vehicle upper side toward the vehicle rear side. Since it has reached the upper end, the weight of the reinforcing member can be reduced.

  According to the third aspect of the present invention, in the bumper structure according to the first or second aspect, since the bending rigidity of the reinforcing member is effectively increased, in addition to the effect of the first or second aspect, The weight can be further reduced.

  According to a fourth aspect of the present invention, in the bumper structure according to the third aspect, the reinforcing member is formed into an L-shaped or T-shaped simple shape, so that the force received by the reinforcing member can be ensured. Since the reinforcement supports, in addition to the effect of the third aspect, the weight of the reinforcing member can be further reduced.

  According to the fifth aspect of the present invention, in the bumper structure according to any one of the first to fourth aspects, the moment acting on the reinforcing member is reduced by the deformation of the horizontal partition plate to absorb the impact load. In addition to the effects described in any one of claims 1 to 4, the weight of the reinforcing member can be further reduced.

  According to the sixth aspect of the present invention, in the bumper structure according to the fifth aspect, since the lower plate is deformed to absorb the impact load and the moment acting on the reinforcing member is reduced, the effect of the fifth aspect is achieved. In addition, the weight of the reinforcing member can be further reduced.

  According to the seventh aspect of the present invention, in the bumper structure according to any one of the first to fourth aspects, the moment acting on the reinforcing member is reduced by the impact absorbing member being deformed to absorb the collision load. In addition to the effects described in any one of claims 1 to 4, the weight of the reinforcing member can be further reduced.

  The invention according to claim 8 is the bumper structure according to claim 7, wherein the moment acting on the reinforcing member is reduced by the deformation of the bumper cover and the impact absorbing member to absorb the collision load. In addition to the effect of item 7, the weight of the reinforcing member can be further reduced.

  1st Embodiment of the bumper structure in this invention is described according to FIGS.

  In the figure, the arrow FR indicates the vehicle front direction, the arrow UP indicates the vehicle upward direction, and the arrow IN indicates the vehicle width direction inner side.

  As shown in FIG. 6, the bumper cover 12 to which the present invention is applied is integrally formed of a resin material, is disposed along the vehicle width direction, and includes a bumper upper portion 12A that protects the vehicle 10. I have. The upper end of the bumper cover 12 is attached to the vehicle 10 with a bolt 16 (see FIG. 1). Further, in order to ensure ventilation to a radiator (not shown), the bumper cover 12 is provided with an opening 30 extending in the vehicle width direction, and an inner peripheral edge 32 of the opening 30 has a vertical partition plate 26 described later. And a horizontal partition plate 34 are provided.

  As shown in FIGS. 1 and 4, a bumper reinforcement 14 that protects a vehicle functional component such as a radiator (not shown) at the time of a light collision is disposed behind the bumper cover 12 in the vehicle. The bumper reinforcement 14 is attached to a vehicle body skeleton member (not shown), and is disposed along the vehicle width direction. The bumper reinforcement 14 is a hollow rectangular shape having a longitudinal cross section that is long in the vehicle vertical direction, an upper wall 14A facing upward, a front wall 14B facing forward, and a lower wall 14C facing downward. And a rear wall 14D facing the rear of the vehicle.

  Between the bumper reinforcement 14 and the bumper cover 12, a foam member 40 that is formed of a foam material and absorbs a collision load by being deformed is disposed along the vehicle width direction, and is fixed to the bumper reinforcement 14 with a clip (not shown). Has been. The foam member 40 includes a first absorbent part 40A, a second absorbent part 40B, and a joint part 40C that connects them.

  Specifically, the first absorption portion 40A is disposed immediately above the opening 30 of the bumper cover 12 and between the back surface of the bumper cover 12 and a stay 20 (described later) attached to the front wall 14B of the bumper reinforcement 14, The right-angled cross section in the longitudinal direction has a substantially rectangular shape extending in the vehicle front-rear direction. Further, the second absorption portion 40B is located above the first absorption portion 40A, the rear end thereof is placed on the upper wall 14A of the bumper reinforcement 14, and the front end position thereof is behind the vehicle from the front end position of the first absorption portion 40A. The right-angle cross section in the longitudinal direction is provided as a substantially rectangular shape extending in the vehicle front-rear direction. Furthermore, the rear end portion of the first absorption portion 40A and the center portion of the second absorption portion 40B in the vehicle front-rear direction are connected by a joint portion 40C. The reason why the foam member 40 is divided into the first absorption portion 40A and the second absorption portion 40B is that the thickness (height) of the first absorption portion 40A and the second absorption portion 40B is made thin and the bottom when deformed ( This is for the purpose of causing the occurrence of high rigidity and no deformation.

  With this configuration, at the time of a collision with a collision object, after the first absorption part 40A is deformed, the second absorption part 40B is deformed to absorb the collision load.

  As shown in FIGS. 4 and 5, the six stays 20, which are reinforcing members that extend from the bumper reinforcement 14, have an L-shaped cross section in the longitudinal direction (horizontal section). A fixed plate 20A to be attached and a support plate 20B extending from the end of the fixed plate 20A perpendicularly to the front of the vehicle are provided. In this way, the plate surfaces of the fixed plate 20A and the support plate 20B are arranged in a direction crossing each other (in the two embodiments, it is a right-angle L-shape but may be a T-shape or the like). It is lightweight and has a shape that is strong against bending. Further, as shown in FIGS. 1 and 3, the support plate 20 </ b> B is formed long in the vertical direction when viewed from the vehicle width direction, and protrudes forward of the vehicle at an intermediate portion between the lower end portion of the stay 20 and the bumper reinforcement 14. 20J. When viewed from the vehicle width direction, the support portion 20J is provided extending in the vehicle vertical direction in parallel with the rear end of the support plate 20B, and supports the load received by the bumper cover 12 at the time of collision. The upper and lower sides of the support portion 20J are an upper oblique side portion 20K and a lower oblique side portion 20L in which the dimension of the support plate 20B in the vehicle longitudinal direction is gradually reduced. As a result, the support portion 20J, the upper oblique side portion 20K, and the lower oblique side portion 20L have a trapezoidal shape with the vertical dimension of the support plate 20B as the bottom side and the support portion 20J as the upper side when viewed from the vehicle width direction. The upper oblique side portion 20K above the support portion 20J faces the rear surfaces of the first absorption portion 40A and the joining portion 40C.

  The upper portion of the fixing plate 20A of the stay 20 extends in the vehicle vertical direction and is in contact with the front wall 14B of the bumper reinforcement 14. Two bolts 16 are fastened to the fixing plate 20A and the nut 18 (see FIG. 1) welded to the back surface of the front wall 14B through the front wall 14B from the front of the vehicle with a predetermined distance in the vertical direction of the abutting surface. As a result, the stay 20 is attached to the bumper reinforcement 14.

  With this configuration, the stay 20 can support the collision load by the support portion 20J provided between the lower end portion thereof and the bumper reinforcement 14 at the time of collision with the collision body. Further, the moment which is generated at the time of the collision and is about to rotate the lower end of the stay 20 in the vehicle rearward direction as viewed from the vehicle width direction is supported by the front wall 14B of the bumper reinforcement 14.

  Further, the lower end portion of the stay 20 is formed with an attaching portion 20H to which the fixing plate 20A is extended and bent horizontally toward the rear, and the lowermost portion of the bumper cover 12 (see FIG. 1) is attached. The mounting portion 20H is provided with a through hole, and a nut 20C is welded to the upper surface of the mounting portion 20H so that a bolt can be tightened from the through hole. The six stays 20 are symmetrical with respect to the center in the vehicle width direction (the chain line shown in FIG. 4).

  As shown in FIGS. 3 and 5, a vertical partition plate 26 is provided on the support plate 20 </ b> B of the stay 20 in front of the vehicle. The vertical partition plate 26 is formed integrally with the bumper cover 12, connects the inner peripheral edge 32 (see FIG. 6) of the opening 30 in the vehicle vertical direction, and divides the opening 30 in the vehicle width direction. . Specifically, as shown in FIG. 5, the vertical partition plate 26 has a V-shaped configuration in which a longitudinal cross section in the longitudinal direction is opened rearward of the vehicle, and is provided at two side surfaces 26 </ b> A and an intersection of the side surfaces. The arc-shaped portion 26B extends in the vehicle vertical direction as shown in FIG. Therefore, a support portion 20J that is a tip portion of the support plate 20B is disposed in the vicinity of the rear of the arc-shaped portion 26B. Note that the stays 20 at both ends in the vehicle width direction shown in FIG. 4 are disposed on the outer side in the vehicle width direction from the opening 30. The portion 20J corresponds to the back surface of the bumper cover 12.

  As shown in FIG. 6, the vertical partition plate 26 decorates the opening 30 and further increases the strength of the opening 30. In order to further increase the strength of the opening 30, a horizontal partition plate 34 that connects the inner peripheral edge 32 of the opening 30 in the vehicle width direction and divides the opening 30 in the vehicle vertical direction is provided. The horizontal partition plate 34 is connected to the vertical partition plate 26 at an intersection with the vertical partition plate 26. In detail, the horizontal partition plate 34 formed integrally with the bumper cover 12 has a longitudinal direction in the vehicle width direction, and as shown in FIG. It is V-shaped and includes an upward surface 34A, a downward surface 34B, and a connecting portion 34C provided at the intersection thereof. Further, the front end portion thereof is disposed in the front portion of the vehicle with respect to the vertical partition plate 26. With this configuration, at the time of collision with the collision body, the horizontal partition plate 34 is deformed and supported by the vertical partition plate 26, and the vertical partition plate 26 is supported by the support portion 20 </ b> J of the stay 20.

  As shown in FIGS. 3 and 6, a substantially V-shaped lower plate 36 with the opening directed toward the rear of the vehicle is provided along the vehicle width direction below the opening 30 in the same manner as the horizontal partition plate 34. The lower edge of the opening 30 is configured. The lower plate 36 includes an upward surface 36A facing upward in the vehicle, a downward surface 36B facing downward in the vehicle, and a connecting portion 36C provided at the intersection thereof. The shape takes into account the appearance of the chassis parts (not shown) to be arranged. The rear portion of the upward surface 36A is connected to and supported by the lower end portion of the vertical partition plate 26. Further, the rear end portion of the downward surface 36B, which is the lowermost part of the bumper cover 12, is inserted into a through hole 38C (see FIG. 4) provided in a retainer 38 (see FIG. 4) described later and the downward surface 36B. It is attached to the stay 20 by being inserted into the provided through hole and tightened to a nut 20 </ b> C welded to the attachment portion 20 </ b> H of the stay 20. Furthermore, the position of the front end portion of the lower plate 36 in the vehicle front-rear direction is provided at the same position as the front end portion of the horizontal partition plate 34 in front of the vertical partition plate 26 in the vehicle.

  With this configuration, at the time of collision with the colliding body, the lower plate 36 is supported by the vertical partition plate 26 supported by the support portion 20J of the stay 20 and the mounting portion 20H of the stay 20 and deforms to absorb the collision load. .

  As shown in FIGS. 3 and 4, the retainer 38 is formed of a flat panel, supports the downward surface 36 </ b> B of the lower plate 36, and is disposed along the vehicle width direction, and the downward surface 36 </ b> B of the lower plate 36. , And a reinforcing surface 38B bent at the rear end of the vehicle at the rear lower side. The support surface 38A is provided with six through holes 38C through which the bolts 17 tightened to the nuts 20C welded to the mounting portion 20H of the stay 20 are inserted, and between each of the through holes 38C, A through hole 38D having the same shape is provided. Further, the bolt 19 is inserted from the lower side of the vehicle through the through hole 38D and a through hole (not shown) provided in the lower surface 36B of the lower plate 36, and tightened to the nut 24 provided on the back surface of the bumper cover 12. .

  With the bolts 19 and 17, the lowermost part of the bumper cover 12 is attached to the retainer 38 at short intervals along the vehicle width direction, and the strength of the downward surface 36 </ b> B of the lower plate 36 is increased.

  Next, the operation of the first embodiment will be described.

  In the bumper structure of the first embodiment, as shown in FIG. 1, the action and effect can be confirmed by applying the impactor 42 as a collision body from the front of the vehicle. The impactor 42 includes a first cylindrical portion 42A, a second cylindrical portion 42B, a joint portion 42C, and a covering portion 42D formed of a foam covering these.

  When the impactor 42 is applied to the bumper structure to which the present invention is applied from the front of the vehicle, the first cylindrical portion 42A first hits the first absorbing portion 40A of the foam member 40 through the bumper cover 12. The first absorption portion 40A is supported by the stay 20 and deforms rearward of the vehicle to absorb the collision load. Further, the first cylindrical portion 42 </ b> A of the impactor 42 contacts the horizontal partition plate 34 and the lower plate 36 at the same time.

  The horizontal partition plate 34 is deformed and supported by the vertical partition plate 26, and the vertical partition plate 26 is supported by the support plate 20B. As a result, the horizontal partition plate 34 is reliably deformed to absorb the impact load.

  At the same time as the horizontal partition plate 34 is deformed, the lower plate 36 is deformed and supported by the mounting portion 20H and the support plate 20B via the vertical partition plate 26. As a result, the lower plate 36 is reliably deformed to absorb the impact load.

  The support plate 20B of the stay 20 receives a load from the vertical partition plate 26 that supports the horizontal partition plate 34 and the lower plate 36 to the rear of the vehicle. As a result, a moment is exerted on the stay 20 such that the lower end portion rotates rearward of the vehicle.

  Since the support plate 20B has a plate shape extending in the vehicle front direction, the bending strength in the plane extending in the vehicle front-rear direction is high, and the collision load can be effectively supported. Further, since the stay 20 can support the load by the support portion 20J between the lower end portion and the bumper reinforcement 14, the generated moment is reduced as compared with the case where the load is supported only by the lower end of the stay 20. The

  The moment acting on the stay 20 is supported by the front wall 14B of the bumper reinforcement 14. Here, the stay 20 extends in the up-down direction of the vehicle and comes into contact with the front wall 14B of the bumper reinforcement 14, and the stay 20 is attached to the front wall 14B on the contact surface. For this reason, since the stay 20 can be fixed to the front wall 14B at a position where the length of the moment arm is sufficiently long from the contact portion A, the stay 20 is rotated by the moment that the front wall 14B of the bumper reinforcement 14 acts on the stay 20. I support you.

  Since the second cylindrical portion 42B of the impactor 42 does not come into contact with the first absorption portion 40A via the bumper cover 12, the upper portion of the impactor 42 rotates rearward while approaching the vehicle, as shown in FIG. The second cylindrical portion 42B hits the second absorbing portion 40B of the foam member 40, the radiator grill 44, and the engine hood 46 via the bumper cover 12, and these components are deformed to absorb the collision load.

  Therefore, compared to a structure that receives a collision load only at the lower end of the stay 20, the moment received by the stay 20 is reduced, and the weight of the stay 20 can be minimized.

  Further, as shown in FIGS. 3 and 4, the support rigidity of the lower plate 36 is uniformly increased by providing the lower surface 36 </ b> B of the lower plate 36 between the stays 20.

  In order to reduce the angle (E shown in FIG. 2) formed by the first cylindrical portion 42A and the second cylindrical portion 42B after the collision, the lower plate 36 supports the impact load, and the load to be supported toward the upper portion is increased. It is desirable that the upper part of the impactor 42 be inclined to the rear of the vehicle.

  Next, 2nd Embodiment of the bumper structure of this invention is described according to FIGS.

  In addition, about the same member as 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIGS. 9 and 10, the horizontal partition plate 34 (see FIG. 6) and the vertical partition plate 26 (see FIG. 6) of the first embodiment formed integrally with the bumper cover 12 are provided. Instead, a grill 48 having a lattice shape at the upper and lower central portions is provided. Further, the foam member 40 (see FIG. 4) of the first embodiment is not provided.

  As shown in FIG. 9, a mounting plate 20 </ b> D is extended from the upper oblique side portion 20 </ b> K of the support plate 20 </ b> B of the stay 20. The mounting plate 20D extends from the support plate 20B at a right angle and is inclined so that the upper surface faces the upper front side of the vehicle. The mounting plate 20D serves as a mounting surface for the grille 48, and a nut 20E (see FIG. 8) is welded to the rear surface. A mounting plate 20F is extended from the lower oblique side portion 20L of the support plate 20B. The mounting plate 20F extends from the support plate 20B at a right angle and is inclined so that the lower surface faces the front lower side of the vehicle, and is used as a mounting surface for the grille 48. A nut 20E (see FIG. 8) is welded to the rear surface. .

  As shown in FIGS. 7 and 9, the grill 48, which is integrally formed of a resin material, decorates the opening 30 and is an impact absorbing member, has a longitudinal direction arranged along the vehicle width direction. A right-angle cross section of the grill 48 in the longitudinal direction is substantially U-shaped with the opening facing the rear of the vehicle, and a mounting plate that is a seating surface for mounting to the stay 20 is located at the rear end of the substantially U-shaped. 48D and the mounting plate 48E are provided extending, and a plurality of lattices are provided extending backward in the substantially U-shaped interior. Further, an inner peripheral edge portion 32 of the opening 30 of the bumper cover 12 is disposed close to the front portion of the grille 48 with the tip thereof facing the rear of the vehicle.

  Specifically, as shown in FIG. 8, the grille 48 includes a contact plate 48 </ b> A corresponding to the inner peripheral edge 32 of the opening 30 of the bumper cover 12, and a mounting plate extending from the upper end of the contact plate 48 </ b> A toward the rear of the vehicle. The upper plate 48B that contacts 48D and the lower plate 48C that extends rearward from the lower end of the contact plate 48A and contacts the mounting plate 48E are formed in a substantially U shape. The bumper cover 12 has a peripheral edge of the opening portion 30 bent toward the rear of the vehicle and a tip end portion serving as an inner peripheral edge portion 32, and is close to the grille 48 around the opening portion 48 </ b> J at the center of the grille 48. Accordingly, the contact plate 48 </ b> A extends further in the vertical direction than the vertical periphery of the opening 30.

  A mounting plate 48D for attaching to the mounting plate 20D of the stay 20 extends from the rear end of the upper plate 48B toward the vehicle rear upper side, and the stay 20 from the rear end of the lower plate 48C toward the vehicle rear lower side. A mounting plate 48E is attached to the mounting plate 20F. Further, as shown in FIG. 9, the mounting plate 48D and the mounting plate 48E attached to the stay 20 are provided with through holes 48H, and bolts 49 are inserted into the through holes 48H so that the mounting plate of the stay 20 is attached. The grille 48 is attached to the stay 20 by tightening the nut 20E (see FIG. 8) welded to the 20D and 20F.

  The plurality of grids provided inside the U-shape includes six horizontal grids 48F provided horizontally and a plurality of vertical grids 48G provided vertically. The horizontal grating 48F and the vertical grating 48G are connected to each other at the intersection to increase the rigidity. Further, the horizontal grid 48F provided at the lowermost position and the horizontal grid 48F provided second from the top are connected to the upper and lower edges of the opening 48J of the contact plate 48A, and the vertical grids 48G at both ends in the vehicle width direction are connected to each other. It is connected to the left and right edges of the opening 48J. For this reason, the two horizontal grids 48F and the vertical grid 48G connected thereto are exposed to the front of the vehicle through the opening 48J, and the opening 48J guides the wind from the front entering from the opening 30 to the rear of the vehicle. ing.

  As shown in FIG. 8, in order to increase the rigidity of the contact plate 48A in the portion C where the inner peripheral edge 32 of the opening 30 and the contact plate 48A are in contact with each other and the contact plate 48A in the portion D, The rear end portions of the three horizontal lattices 48F that are the second from the top and the bottom are in contact with the front end surfaces of the upper oblique side portion 20K and the lower oblique side portion 20L of the support plate 20B. The rear ends of the other horizontal grids 48F are arranged with a predetermined distance from the support plate 20B. The position of the rear end portion of the vertical lattice 48G in the vehicle front-rear direction is provided to be the same position as the rear end portion of the intersecting horizontal lattice 48F.

  The operation of the second embodiment is that when the impactor 42 is applied to the bumper cover 12, the bumper cover 12 is deformed and the inner peripheral edge 32 of the opening 30 is supported by the grill 48. It is supported by 20B. Then, the bumper cover 12 is deformed, and the upper plate 48B, the lower plate 48C, and the horizontal lattice 48F of the grille 48 are buckled to absorb the collision load, and is the same as the above embodiment.

  Note that the upper portion of the impactor 42 may be easily tilted backward by tilting the upper portion of the contact plate 48A of the grille 48 as viewed from the vehicle width direction toward the rear of the vehicle. Further, the upper portion of the impactor 42 may be easily tilted backward by making the horizontal lattice 48F above the grill 48 easy to bend and making the lower horizontal lattice 48F difficult to bend.

  In the second embodiment, similarly to the first embodiment, the moment received by the stay 20 can be reduced.

  Further, by providing the grille 48 larger in the vertical direction than the opening 30 of the bumper cover 12 and disposing the grille 48 inside the bumper cover 12, the foam member 40 (see FIG. 1) can be eliminated, resulting in cost reduction.

  Next, a third embodiment of the bumper structure of the present invention will be described with reference to FIGS.

  In addition, about the same member as 2nd Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In this embodiment, unlike the second embodiment, the grill 48 (see FIG. 7) formed of a resin material is not provided. Instead, as shown in FIGS. A wire mesh grill 66 is provided.

  As shown in FIGS. 12 and 13, the wire mesh grille 66 whose upper and lower ends are attached to the stay 20 is disposed between the stay 20 and the bumper cover 12. The wire mesh grill 66 is provided with a longitudinal direction along the vehicle width direction, and a right-angle cross section in the longitudinal direction is substantially U-shaped with the opening directed toward the rear of the vehicle.

  Specifically, the wire mesh grill 66 includes a contact plate 66A corresponding to the inner peripheral edge 32 of the opening 30, an upper plate 66B extending from the upper end of the contact plate 66A to the rear of the vehicle, and a vehicle rear from the lower end of the contact plate 66A. The lower plate 66 </ b> C extends in a U shape. Furthermore, an attachment surface 66D is provided from the rear end of the upper plate 66B toward the stay 20 toward the upper rear side of the vehicle, and is attached to the stay 20 from the rear end of the lower plate 66C toward the lower rear side of the vehicle. A mounting surface 66E is provided.

  Further, as shown in FIG. 14 (A), an opening portion of a U-shaped bent portion opened forward of the vehicle by folding the wire mesh sheet in half on the contact plate 66A as shown in FIG. As shown in FIG. 14B, a horizontal reinforcing plate 66F in which 66G is closed by a clamp member 68 is provided. Accordingly, it is not necessary to weld a reinforcing plate as a separate part, and the opening 66G is closed by the clamp member 68. Therefore, the rigidity of the horizontal reinforcing plate 66F is increased, and the opening 66G does not open at the time of collision. The reinforcing plate 66F can be deformed to absorb the collision load.

  The horizontal reinforcing plate 66F includes a portion C (below the upper horizontal reinforcing plate 66F) where the inner peripheral edge portion 32 of the opening 30 is in contact with the contact plate 66A, and a portion D (lower than the lower horizontal reinforcing plate 66F). The rear end bent portion of the horizontal reinforcing plate 66F enters the U-groove 20G provided on the upper oblique side portion 20K of the support plate 20B and the front end surface of the support portion 20J. With this configuration, the horizontal reinforcing plate 66F is prevented from falling with respect to a load from the front of the vehicle, and can sufficiently absorb the collision load when deformed by receiving the collision load.

  The rigidity balance between the upper and lower horizontal reinforcing plates 66F is determined in consideration of the load to be absorbed and the amount of deformation at the time of collision. Further, the contact surface 66A is not only larger than the vertical dimension of the opening 30 as described above, but is also larger than the horizontal dimension of the opening 30 in the same manner as in the above embodiment.

  The action of the third embodiment is that, when a collision occurs, the upper plate 66B, the lower plate 66C, and the horizontal reinforcing plate 66F of the wire mesh grill 66 sandwiched between the support plate 20B and the bumper cover 12 buckle, so that the collision load is reduced. Except for the point absorbed, it is the same as the second embodiment.

  Further, the wire mesh grill 66 of the present embodiment is formed by bending a wire mesh sheet, and has an inexpensive structure.

  Although the present invention has been described in detail with respect to specific embodiments, the present invention is not limited to such embodiments, and various other embodiments are possible within the scope of the present invention. It is clear to the contractor. For example, in the third embodiment, the horizontal reinforcing plate 66F of the wire mesh grill 66 has a high strength by horizontally folding the wire mesh sheet and closing the opening 66G with the clamp member 68. Not limited to this, the horizontal reinforcing plate may have high strength by fixing the opening 66G so as not to open in the vehicle vertical direction by other fixing means such as welding.

The bumper structure which concerns on 1st Embodiment of this invention is shown, and it is the 1-1 sectional view taken on the line in FIG. FIG. 7 is a cross-sectional view taken along line 1-1 in FIG. 6, showing the bumper structure according to the first embodiment of the present invention, after the impactor collides. It is the figure which showed the bumper structure which concerns on 1st Embodiment of this invention, and expanded the opening part of the bumper cover in FIG. 1 is an exploded perspective view showing a bumper structure, a stay, a foam member, and the like, showing a bumper structure according to a first embodiment of the present invention. FIG. 5 is an end view taken along line 5-5 in FIG. 6, showing the stay and the vertical partition plate of the bumper structure according to the first embodiment of the present invention. 1 is a perspective view of a vehicle to which a bumper structure according to a first embodiment of the present invention is applied. FIG. 7 shows a bumper structure according to a second embodiment of the present invention, and is a sectional view taken along line 7-7 in FIG. It is the figure which showed the bumper structure which concerns on 2nd Embodiment of this invention, and expanded the opening part of the bumper cover in FIG. It is the disassembled perspective view which showed the bumper structure which concerns on 2nd Embodiment of this invention, and showed bumper reinforcement, a stay, a grill, etc. It is a perspective view of the vehicle to which the bumper structure concerning 2nd Embodiment of this invention was applied. FIG. 16 shows a bumper structure according to a third embodiment of the present invention, and is a cross-sectional view taken along line 11-11 in FIG. FIG. 12 shows a bumper structure according to a third embodiment of the present invention, and is an enlarged view of an opening of the bumper cover of FIG. 11. It is the disassembled perspective view which showed the bumper structure which concerns on 3rd Embodiment of this invention, and showed the bumper reinforcement, the stay, the wire-mesh grill, etc. (A) It is sectional drawing of the vehicle center part seen from the vehicle width direction outer side which showed the wire mesh grill to which 3rd Embodiment of this invention was applied, and showed the middle of forming a horizontal reinforcement board. (B) It is sectional drawing of the vehicle center part seen from the vehicle width direction outer side which showed the state by which the opening of the horizontal reinforcement board was connected by the clamp member, showing the wire mesh grille to which 3rd Embodiment of this invention was applied. is there. It is a perspective view of the vehicle to which the engagement bumper structure was applied to 3rd Embodiment of this invention.

Explanation of symbols

10 vehicle 12 bumper cover 14 bumper reinforcement 14B front wall 20 stay (reinforcing member)
20A Fixed plate 20B Support plate 20J Support part
20K Upper oblique side portion 26 Vertical partition plate 30 Opening portion 32 Inner peripheral edge portion 34 Horizontal partition plate 36 Lower plate 48 Grill (shock absorbing member)
66 Wire grill (shock absorbing member)

Claims (8)

Bumper reinforcement arranged along the vehicle width direction behind the bumper cover,
The bumper reinforcement is attached to the bumper reinforcement at a fixed portion provided at a predetermined distance in the vertical direction of the vehicle while the upper part contacts the front wall facing the front of the vehicle and extends in the vertical direction of the vehicle. A support portion that extends downward from the bumper reinforcement and supports a lowermost portion of the bumper cover at a lower end portion thereof, and protrudes forward of the vehicle at an intermediate portion between the lower end portion and the contact portion with the bumper reinforcement . Is provided to extend in the vehicle vertical direction when viewed from the side of the vehicle, and at the time of a vehicle collision, a reinforcing member that supports the force received by the bumper cover with the support portion;
Bumper structure with The said reinforcement member is provided with the upper oblique side part which inclines to the vehicle rear side toward the vehicle upper direction following the upper end of the said support part, and reaches the upper end of the said reinforcement member. Bumper structure.   3. The bumper according to claim 1, wherein the reinforcement member includes a support plate extending in the vehicle front-rear direction, and the support plate of the reinforcement member supports the force received by the bumper cover in the event of a vehicle collision. Construction.   The reinforcing member including the support plate extending in the vehicle front-rear direction is provided with a fixing plate that is an attachment surface attached to the bumper reinforcement and extends in the vehicle width direction, and the plate surface of the support plate and the fixing plate The bumper structure according to claim 3, wherein the bumper structure is arranged in a crossing direction. The bumper cover includes an opening extending in the vehicle width direction,
A vertical partition plate arranged along the vehicle vertical direction, partitioning the opening in the vehicle width direction, and supported by the support portion of the reinforcing member at the time of a vehicle collision,
It is arranged along the vehicle width direction, partitions the opening in the vehicle vertical direction, is connected to the vertical partition plate at the intersection with the vertical partition plate, and its front end is provided in front of the vehicle from the vertical partition plate With horizontal dividers,
The bumper structure according to any one of claims 1 to 4, further comprising:   The lower edge of the opening provided in the bumper cover is a lower plate, and the lower plate is provided with an upward surface and a downward surface that open at the rear of the vehicle and are connected at the front of the vehicle, The rear end portion of the downward surface is a lowermost portion of the bumper cover, the upward surface is supported by the vertical partition plate, and the front end portion is disposed in front of the vehicle from the vertical partition plate. Item 6. The bumper structure according to Item 5.   The bumper cover is provided between the opening extending in the vehicle width direction and the reinforcing member, and is arranged to extend vertically above and below the upper and lower peripheral edges of the opening. The bumper structure according to any one of claims 1 to 4, wherein a collision absorbing member that absorbs water is provided.   The bumper structure according to claim 7, wherein the collision absorbing member corresponds to a vehicle rear of an edge portion of the opening provided in the bumper cover and receives a collision load from the bumper cover.

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