JP3740901B2 - Front body structure of the vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a front body structure of a vehicle that ensures the safety of a pedestrian during a collision between the vehicle and a pedestrian.
[0002]
[Prior art]
  Conventionally, as a front body structure of a vehicle provided with a bumper at a front lower portion of a bonnet extending forward, there is a structure described in, for example, Japanese Patent Application Laid-Open No. 11-1149.
  That is, it is a general structure including a bumper face, a foam material as an impact absorbing material, and a bumper having a bumper reinforcement. In this case, when the vehicle and the pedestrian collide, there is a problem that the pedestrian is damaged.
[0003]
  In order to solve such a problem, a vehicle airbag device described in Japanese Patent Laid-Open No. 6-72284 has already been invented.
  This device stores an airbag in a front bumper, and is provided with a sensor (ultrasonic sensor) that detects obstacles ahead of the vehicle such as a pedestrian, and the vehicle is based on both outputs of this sensor and the vehicle running state detection means. Predicting a collision with a pedestrian, and deploying an airbag in the front bumper in the vehicle traveling direction at the time of the collision prediction to prevent direct contact between the pedestrian and the vehicle, thereby ensuring the safety of the pedestrian .
[0004]
  Although this conventional apparatus has an advantage that the safety of pedestrians can be ensured, obstacle detection means such as a sensor and an air bag are required, and the structure thereof is complicated, and there is a risk of malfunction.
[0005]
[Problems to be solved by the invention]
  The present invention includes a vehicle width direction member in which a bumper extends in the vehicle width direction, and an energy absorbing member provided at a front portion of the vehicle width direction member. Providing a projecting member projecting forward, and further positioning the energy absorbing member ahead of the line connecting the tip of the bonnet and the tip of the projecting member, walking with the above projecting member at the time of a collision between the vehicle and the pedestrian After the pedestrian's foot is paid below the knee of the pedestrian and the impact energy of the pedestrian's knee tilting to the vehicle side is absorbed by the energy absorbing member, the pedestrian is securely placed on the hood, and the secondary obstacle Further, an object of the present invention is to provide a vehicle front body structure that is simple in structure and free from malfunction.
[0006]
  In one embodiment of the present invention, an object of the present invention is to provide a vehicle front body structure in which an existing member can be used effectively by setting the above-mentioned vehicle width direction member to a bumper reinforcement.
[0007]
  In one embodiment of the present invention, the tip of the protruding member is positioned forward or backward from the tip of the energy absorbing member, so that the protruding member causes the protruding member to be more than the pedestrian's knee during a collision between the vehicle and the pedestrian. An object of the present invention is to provide a front body structure of a vehicle that can reliably pay a pedestrian's foot at the bottom.
[0008]
  In one embodiment of the present invention, by setting the energy absorption amount of the above-described protruding member to be larger than the energy absorption amount of the energy absorption member, the vehicle can reliably remove the pedestrian from the lower leg portion. The purpose is to provide a front body structure.
[0009]
  In one embodiment of the present invention, the projecting member is formed of a resin member, so that the projecting property of the projecting member and the assembling property of the projecting member with respect to the vehicle are improved, and the compatibility with the vehicle design is improved. An object of the present invention is to provide a vehicle front body structure that can be realized.
[0010]
  In one embodiment of the present invention, the projecting member includes a projecting member along the lower part of the bumper face and a support member that supports the projecting member on the front of the vehicle body. It is an object of the present invention to provide a front vehicle body structure of a vehicle that can be configured by an installation member and a support member.
[0011]
  In one embodiment of the present invention, the above-described energy absorbing member is constituted by any one of an energy absorber member (refer to an EA member such as a polystyrene foam), a resin structure, and a damping device (refer to a damper), so that a pedestrian In the stage before hitting the bonnet, the energy absorbing member can surely absorb energy, the pedestrian's tilting speed can be reduced, and the pedestrian can be placed more reliably on the upper part of the hood. An object of the present invention is to provide a front body structure of a vehicle that can perform the above.
[0012]
  In one embodiment of the present invention, the above-described protruding member is attached to a vehicle body-side strength member (see front cross member, perimeter frame) at the front of the vehicle body, so that the supporting strength of the protruding member can be secured. The purpose is to provide a vehicle body structure.
[0013]
  In one embodiment of the present invention, the above-described protruding member is set to a strength that does not generate a load exceeding a predetermined value in order to ensure the safety of the pedestrian's foot at the time of collision, so that the pedestrian's foot by the protruding member can be obtained. An object of the present invention is to provide a front body structure of a vehicle that can ensure the safety of the legs when paying.
[0014]
  The present invention also provides a bumper having a bumper face and a vehicle width direction member positioned behind the bumper face and fixed to a vehicle body frame of the vehicle. A lower portion of the bumper extends in the vehicle width direction and a rear portion thereof is provided. A lower leg support member supported by the vehicle body side strength member is provided, and an upper portion of the bumper face is positioned in front of a line connecting the tip of the bonnet and the tip of the lower leg support member, and in front of the vehicle width direction member. Between the energy absorbing member provided and the vehicle width direction memberWhen the bumper face is displaced rearward, the tip of the lower leg support member protrudes relatively forward from the tip of the energy absorbing member.By providing an interval, after the pedestrian's foot is paid below the pedestrian's knee with the lower leg support member at the time of collision between the vehicle and the pedestrian, the pedestrian is securely put on the bonnet, and secondary obstacles are caused. An object of the present invention is to provide a front vehicle body structure of a vehicle that can be prevented, has a simple structure, does not malfunction, and has no bumper design restrictions and can be improved in assembly.
[0015]
  In one embodiment of the present invention, an object of the present invention is to provide a vehicle front body structure in which an existing member can be used effectively by setting the above-mentioned vehicle width direction member to a bumper reinforcement.
[0016]
  In one embodiment of the present invention, by setting the energy absorption amount of the lower leg support member to be larger than the energy absorption amount of the energy absorption member provided at the front portion of the vehicle width direction member, It is an object of the present invention to provide a front vehicle body structure of a vehicle that can reliably remove a foot from the vehicle and can absorb the impact energy of a knee of a pedestrian tilting toward the vehicle with an energy absorbing member.
[0017]
  In one embodiment of the present invention, the energy absorbing member described above is configured by a rib provided integrally with the bumper face, so that the energy absorbing amount can be increased and the energy absorbing amount can be easily adjusted. An object of the present invention is to provide a front body structure of a vehicle.
[0018]
  In one embodiment of the present invention, by providing a predetermined interval between the energy absorbing rib and the bumper reinforcement, a reliable protrusion operation of the lower support member can be obtained when the bumper face is displaced rearward, thereby An object of the present invention is to provide a front body structure of a vehicle that can be surely removed from the lower leg.
[0019]
  In one embodiment of the present invention, the lower leg support member is configured with ribs, and the upper rib thickness is set to be small and the lower rib thickness is set to be large so that the lower leg support is provided when a load is input from the road side. An object of the present invention is to provide a front vehicle body structure of a vehicle that can ensure the deflection of the member and is advantageous in relation to the approach angle.
[0020]
  In one embodiment of the present invention, the lower leg support member described above is configured by ribs, and the interval between the upper ribs is set roughly and the interval between the lower ribs is set close, so that the lower leg support member can be provided when a load is input from the road side. An object of the present invention is to provide a front vehicle body structure of a vehicle that can ensure bending and is advantageous in relation to an approach angle.
[0021]
  In an embodiment of the present invention, the energy absorbing member described above has a front rib and a rear rib, and is formed so that the energy absorption amount of the front rib is small and the energy absorption amount of the rear rib is large. By doing so, it is possible to soften the impact shock at the initial stage, and then obtain a certain amount of energy absorption, in particular a substantially step-like energy absorption characteristic, and overall increase in the amount of energy absorption can be achieved, Another object of the present invention is to provide a vehicle front body structure that facilitates adjustment of energy absorption load by using ribs.
[0022]
  In one embodiment of the present invention, by setting the thickness of the front rib to be small and the thickness of the rear rib to be large, it is possible to secure a reliable energy absorption amount while softening the collision shock at the initial stage of the collision. An object of the present invention is to provide a front body structure of a vehicle that can perform the above.
[0023]
  In one embodiment of the present invention, by setting the rib interval between the front ribs roughly and the rib interval between the rear ribs densely, it is possible to secure a reliable energy absorption amount while softening the collision shock at the initial stage of the collision. An object of the present invention is to provide a front body structure of a vehicle that can perform the above.
[0024]
[Means for Solving the Problems]
  A vehicle front body structure according to the present invention is a vehicle front vehicle body structure provided with a bumper at a front lower portion of a vehicle bonnet, and includes a vehicle width direction member at a front portion of the vehicle body and a front portion of the vehicle width direction member. And a projecting member provided at a lower portion of the bumper and having a tip projecting forward from the vehicle width direction member, and a bumper face is provided on the front side of the vehicle width direction member and the projection member. In addition, the energy absorbing member is positioned in front of a line connecting the tip of the bonnet and the tip of the protruding member.
[0025]
  In one embodiment of the present invention, the vehicle width direction member at the front of the vehicle body is set to a bumper reinforcement.
[0026]
  In one embodiment of the present invention, the distal end portion of the protruding member is located forward or backward from the distal end of the energy absorbing member.
[0027]
  In an embodiment of the present invention, the energy absorption amount of the protruding member is set larger than the energy absorption amount of the energy absorption member.
[0028]
  In one embodiment of the present invention, the protruding member is formed of a resin member.
[0029]
  In one embodiment of the present invention, the projecting member includes a side member extending along the lower part of the bumper face, and a support member for supporting the side member in the front part of the vehicle body.
[0030]
  In one embodiment of the present invention, the energy absorbing member is constituted by any one of an energy absorber member, a resin structure, and a damping device.
[0031]
  In one embodiment of the present invention, the protruding member is attached to a vehicle body side strength member at the front of the vehicle body.
[0032]
  In one embodiment of the present invention, the protruding member is set to have a strength that does not generate a predetermined load or more in order to ensure the safety of the pedestrian's foot during a collision.
[0033]
  A vehicle front body structure according to the present invention is also a vehicle front vehicle body structure provided with a bumper at a front lower part of a vehicle bonnet, and the bumper is positioned behind the bumper face and the bumper face. A vehicle width direction member fixed to the vehicle body frame of the vehicle, and a lower leg support member extending in the vehicle width direction and supported by a vehicle body side strength member is provided at the lower portion of the bumper, and the upper portion of the bumper face is It is located in front of a line connecting the tip of the bonnet and the tip of the lower leg support member, and between the energy absorbing member provided in front of the vehicle width direction member and the vehicle width direction member.When the bumper face is displaced rearward, the tip of the lower leg support member protrudes relatively forward from the tip of the energy absorbing member.An interval is provided.
[0034]
  In one embodiment of the present invention, the vehicle width direction member is set to a bumper reinforcement.
[0035]
  In an embodiment of the present invention, an energy absorbing member provided at a front portion of the vehicle width direction member is provided, and an energy absorption amount of the lower leg support member is set larger than an energy absorption amount of the energy absorbing member. Is.
[0036]
  In one embodiment of the present invention, the energy absorbing member is constituted by a rib provided integrally with the bumper face.
[0037]
  In one embodiment of the present invention, the energy absorbing member is constituted by an energy absorbing rib, and a predetermined interval is provided between the energy absorbing rib and the bumper reinforcement.
[0038]
  In one embodiment of the present invention, the lower leg support member is composed of ribs, and the thickness of the upper rib is set to be small and the thickness of the lower rib is set to be large.
[0039]
  In one embodiment of the present invention, the lower leg support member is formed of ribs, and the interval between the upper ribs is set roughly and the interval between the lower ribs is set densely.
[0040]
  In one embodiment of the present invention, the energy absorbing member includes a front rib and a rear rib, and is formed so that the energy absorption amount of the front rib is small and the energy absorption amount of the rear rib is large. Is.
[0041]
  In one embodiment of the present invention, the thickness of the front rib is set small and the thickness of the rear rib is set large.
[0042]
  In one embodiment of the present invention, the rib interval between the front ribs is set roughly, and the rib interval between the rear ribs is set close.
[0043]
[Action and effect of the invention]
  According to the present invention, the energy absorbing member is provided in the front portion of the vehicle width direction member described above, and the projecting member whose front end portion projects forward from the vehicle width direction member in the lower portion of the bumper is provided. At the time of a collision with a person, first the pedestrian's foot is paid below the pedestrian's knee with the above-mentioned protruding member, and the impact energy of the pedestrian's knee that is tilted to the vehicle side is then After absorption, there is an effect that a pedestrian can be surely placed on the upper part of the hood to prevent a secondary obstacle.
[0044]
  In addition, the above-described strength setting of the protruding member (setting of the load characteristics) can ensure the safety of the pedestrian's legs (does not cause a fracture), and has an effect that the structure is simple and there is no malfunction.
[0045]
  In addition, since the energy absorbing member described above is located in front of the line connecting the tip of the bonnet and the tip of the protruding member, the energy absorbing member is used to reduce the impact energy of the pedestrian's knee tilting toward the vehicle. It has the effect of absorbing more effectively and protecting the pedestrian's legs from impact.
[0046]
  According to one embodiment of the present invention, since the above-mentioned vehicle width direction member is set as the bumper reinforcement, there is an effect that the existing member (bumper reinforcement) extending in the vehicle width direction can be effectively used.
[0047]
  According to one embodiment of the present invention, since the tip of the protruding member is positioned forward or rearward from the tip of the energy absorbing member, the protruding member causes the pedestrian's knees to move when the vehicle collides with the pedestrian. Also, there is an effect that the pedestrian's foot can be surely paid at the lower part.
[0048]
  According to one embodiment of the present invention, since the energy absorption amount of the protruding member described above is set larger than the energy absorption amount of the energy absorbing member, the pedestrian is surely removed from the lower leg portion by the protruding member. There is an effect that can be done.
[0049]
  According to one embodiment of the present invention, since the projecting member is formed of a resin member, the moldability of the projecting member and the assembling property of the projecting member with respect to the vehicle are improved and the vehicle design is compatible. There is an effect that it is possible to improve.
[0050]
  According to one embodiment of the present invention, the projecting member includes a projecting member extending along the lower bumper face and a support member that supports the projecting member on the front of the vehicle body. There exists an effect which can be comprised with a member and a supporting member.
[0051]
  According to one embodiment of the present invention, since the energy absorbing member described above is configured by any one of the energy absorber member, the resin structure, and the damping device, any one of the above in the stage before the pedestrian contacts the hood. The energy absorbing member can surely absorb energy, can reduce the pedestrian's tilting speed, and can more effectively put the pedestrian on the upper part of the hood.
[0052]
  According to one embodiment of the present invention, since the protruding member is attached to the vehicle body side strength member at the front of the vehicle body, the load from the front direction is received by the vehicle body side strength member, and the pedestrian is removed by the protruding member. Can be reliably performed, and sufficient support strength of the protruding member can be ensured.
[0053]
  According to one embodiment of the present invention, since the above-mentioned protruding member is set to a strength that does not generate a load exceeding a predetermined value in order to ensure the safety of the pedestrian's foot during a collision, the pedestrian's foot by the protruding member This has the effect of ensuring the safety of the lower leg when paying.
[0054]
  According to the present invention, a bumper having a bumper face and a vehicle width direction member positioned behind the bumper face and fixed to a vehicle body frame of the vehicle is provided, and a lower portion of the bumper extends in the vehicle width direction. The lower part of the bumper face is provided with the tip of the bonnet.Lower leg support memberIt is located ahead of the line connecting the tip ofIn addition, between the energy absorbing member and the vehicle width direction member,When the bumper face is displaced backward, the tip of the lower leg support memberTip of energy absorbing memberMore relativeForwardTo protrudeSet an intervalTherefore, there are the following effects.
[0055]
  That is, at the time of a collision between a vehicle and a pedestrian, the bumper face is first displaced backwards,The above interval decreases or becomes zero,As a result, the tip of the lower leg support memberTip of energy absorbing memberMore relativeForwardSince the lower leg support member that protrudes and the rear part is supported by the vehicle body side strength member receives the load from the front direction, the lower leg support member pays the pedestrian's foot below the pedestrian's knee, and the vehicle side There is an effect that a pedestrian leaning on the hood can be surely placed on the upper part of the hood to prevent secondary obstacles.
[0056]
  In addition, by setting the strength of the lower leg support member described above (setting of load characteristics), it is possible to ensure the safety of the pedestrian's legs (no fracture), and the structure is simple and has no malfunction. There are no design restrictions on the bumper, and assembly can be improved.
[0057]
  According to one embodiment of the present invention, since the above-mentioned vehicle width direction member is set to the bumper reinforcement, there is an effect that the existing member can be used effectively.
[0058]
  According to one embodiment of the present invention, the energy absorption amount of the lower leg support member is set to be larger than the energy absorption amount of the energy absorption member provided at the front portion of the vehicle width direction member. Thus, there is an effect that the foot can be surely removed and the impact energy of the pedestrian's knee tilting to the vehicle side can be well absorbed by the above-described energy absorbing member.
[0059]
  According to one embodiment of the present invention, since the energy absorbing member described above is configured by the rib integrally provided with the bumper face, the amount of energy absorption can be increased and the rib thickness and rib density can be controlled. Thus, there is an effect that the energy absorption amount can be easily adjusted.
[0060]
  According to one embodiment of the present invention, since the predetermined interval is provided between the energy absorption rib and the bumper reinforcement, the lower leg support is provided when the bumper face is displaced rearward (when the vehicle collides with the pedestrian). As a result, it is possible to reliably remove the pedestrian from the lower leg portion.
[0061]
  According to one embodiment of the present invention, the lower leg support member described above is configured by ribs, the thickness of the upper rib is set small, and the thickness of the lower rib is set large, so that the lower leg support is provided when a load is input from the road side. The bending of the member can be ensured, which is advantageous in relation to the approach angle.
  Incidentally, when the rib thickness is large both in the upper and lower directions, the bending of the lower leg support member is hindered.
[0062]
  According to one embodiment of the present invention, the lower leg support member described above is configured by ribs, and the interval between the upper ribs is set roughly and the interval between the lower ribs is set close. Therefore, when the load is input from the road side, The bending can be secured and is effective in relation to the approach angle.
  Incidentally, when the rib interval is close both in the upper and lower directions, the bending of the lower leg support member is hindered.
[0063]
  According to one embodiment of the present invention, the above-described energy absorbing member has a front rib and a rear rib so that the energy absorption amount of the front rib is small and the energy absorption amount of the rear rib is large. Since it is formed, the impact shock can be eased in the initial stage, and then a certain amount of energy absorption can be obtained.
  In particular, a substantially step-like energy absorption characteristic can be obtained, and the amount of energy absorption can be increased as a whole, and the use of ribs has an effect of facilitating adjustment of the energy absorption load.
[0064]
  According to one embodiment of the present invention, since the thickness of the front rib is set to be small and the thickness of the rear rib is set to be large, a reliable energy absorption amount is ensured while softening the shock at the initial stage of the collision. There is an effect that can.
[0065]
  According to one embodiment of the present invention, since the interval between the front ribs is set roughly and the interval between the rear ribs is set close, a reliable energy absorption amount can be secured while softening the collision shock at the initial stage of the collision. effective.
[0066]
【Example】
  An embodiment of the present invention will be described in detail with reference to the drawings.
  The drawing shows a front body structure of a vehicle. In FIG. 1, a bonnet 1 extending in the front-rear direction of the vehicle is provided, and the hood 1 covers the upper part of the engine room.
[0067]
  The bonnet 1 described above has a bonnet reinforcement 2, and a radiator grill 4 is disposed between the front end lower portion of the bonnet 1 and the upper portion of the resin bumper face 3.
[0068]
  On the other hand, as shown in FIGS. 1 and 2, left and right front side frames 5, 5 as body frames extending in the front-rear direction of the vehicle are provided, and bumper brackets 6, 6 are provided at front end portions of these front side frames 5, 5. A bumper reinforcement 7 is attached via 6.
[0069]
  The bumper reinforcement 7 is a member extending in the vehicle width direction (that is, a vehicle width direction member), and an energy absorbing member 8 is attached to the front portion and the same height position of the bumper reinforcement 7.
  The energy absorbing member 8 described above is a member extending in the vehicle width direction over substantially the entire width in the longitudinal direction of the bumper face 3 at the inner rear surface portion of the bumper face 3, and the mounting height position of the energy absorbing member 8 is at the pedestrian's knee. Corresponds to the height.
[0070]
  Here, the bumper face 3, the bumper bracket 6, the bumper reinforcement 7, and the energy absorbing member 8 constitute a front bumper 9, and the front bumper 9 is located at the lower front portion of the bonnet 1 that extends forward.
[0071]
  On the other hand, a front cross member 10 (so-called No. 1 cross member) is provided as a vehicle body side strength member extending in the lateral direction (vehicle width direction) of the vehicle body, and a bracket 11 such as a radiator shroud member is connected to the front cross member 10. Yes.
[0072]
  The above-mentioned front cross member 10 is provided with a projecting member 12 whose rear end is supported, and this projecting member 12 projects from the front cross member 10 in a substantially horizontal direction at the lower part of the front bumper 9, and this projecting member The front end (front end) of 12 is made to protrude forward from the bumper reinforcement 7, and further, is set to a position substantially the same as the energy absorbing member 8 and to protrude forward.
[0073]
  In the embodiment of FIG. 1, the tip of the protruding member 12 is configured to protrude forward from the energy absorbing member 8. The height of the protruding member 12 is set to a height at which the protruding member 12 can be in contact with the lower part of the leg part of the pedestrian (a part below the knee).
  Moreover, the energy absorbing member 8 described above is positioned ahead of the line L connecting the tip of the bonnet 1 and the tip of the protruding member 12.
[0074]
  Here, the projecting member 12 is configured to extend across the entire width in the vehicle width direction at the lower part of the bumper face 3, and the projecting member 12 is made of synthetic resin such as PP (polypropylene), PE (polyethylene), or ABS resin in FIG. It is formed as shown.
[0075]
  That is, the projecting member 12 described above is provided with frame portions 13, 14, 15, 16 surrounding the four sides on the left and right sides, and a lateral direction provided between the left and right frame portions 13, 14 with a predetermined interval in the front-rear direction ( (Vehicle width direction) rib 17, a plurality of ribs 18 and 19 extending in the slant direction in the frame portions 13 to 16, and a support piece as a support portion formed upward from the upper portion of the rear frame portion 16. 20 and a reinforcing portion 21 that connects the support piece 20 and the front frame portion 15 are integrally formed of the resin, and a resin structure (honeycomb) having an overall fan-like shape as viewed from the plane. Structure).
[0076]
  This resin structure can set the load characteristic by the thickness or rib density of the frame parts 13-16 and the ribs 17-19, and the direction of a rib. Note that the above-described reinforcing portion 21 may be omitted.
[0077]
  As shown in FIGS. 1 and 2, the projecting member 12 configured in this way is attached to the front surface of the front cross member 10 at the rear portion and acts from the front direction indicated by the arrow x in FIG. 1. It is configured to receive the load.
[0078]
  The load characteristics of the protruding member 12 and the energy absorbing member 8 are set as shown in FIGS.
[0079]
  FIG. 4 is a characteristic diagram showing the load characteristics of the protruding member 12 with the amount of deformation (crushing amount) on the horizontal axis and the load (dynamic crushing load) on the vertical axis, and the load characteristic a of the protruding member 12 is When the input load (unit Newton) is between zero and the predetermined load c, the deformation amount gradually increases within a slight value, but when the input load reaches the predetermined load c, the deformation amount is set to be maximum and constant. Has been.
[0080]
  On the other hand, FIG. 5 is a characteristic diagram showing the load characteristics of the energy absorbing member 8 with the amount of deformation (crushing amount) on the horizontal axis and the load (dynamic crushing load) on the vertical axis. The load characteristic b is set so that the load (unit Newton) and the deformation amount are proportional.
  That is, the energy absorption amount of the protruding member 12 (see the characteristic a in FIG. 4) is set to be larger than the energy absorption amount of the energy absorbing member 8 (see the characteristic b in FIG. 5).
[0081]
  In this embodiment, an EA foam (energy absorber foam) such as polystyrene foam is used as the energy absorbing member 8 described above. The energy absorbing member 8 made of the above-mentioned EA foam may have a solid cross section, a hollow structure, or a structure having a plurality of ribs. Even so, the load characteristic b of FIG. 5 is ensured. In the figure, reference numeral 22 denotes a front wheel. Further, the bumper face 3 described above is attached to a vehicle front member such as the radiator grille 4, the front fender, the front cross member 10, or other vehicle body side at a plurality of locations.
[0082]
  The operation of the front body structure of the vehicle configured as described above will be described.
  At the time of a collision between the vehicle and a pedestrian, a load from the front (see arrow x) is input to the protruding member 12 via the resin bumper face 3. This load is usually less than the predetermined load c shown in FIG. 4, and the input load from the front direction is received by the protruding member 12 whose rear portion is supported by the front cross member 10.
[0083]
  For this reason, at the time of a collision between the vehicle and the pedestrian, the pedestrian's knees which are tilted toward the vehicle side by first paying the pedestrian's foot below the pedestrian's knee with the protruding member 12 described above are After absorbing by the energy absorbing member 8 extending in the direction, the pedestrian is surely placed on the upper part of the hood 1 to be protected.
[0084]
  As described above, according to the embodiments shown in FIGS. 1 to 5 (embodiments corresponding to claims 1 to 5 and 7 to 8), the front portion of the vehicle width direction member (see bumper reinforcement 7) is provided. Since the energy absorbing member 8 is provided and the protruding member 12 is provided so that the front end protrudes forward from the vehicle width direction member (see bumper reinforcement 7) at the lower part of the front bumper 9, the vehicle and the pedestrian In the event of a collision, the pedestrian's foot is first paid below the pedestrian's knee by the protruding member 12, and the impact energy of the pedestrian's knee that is tilted toward the vehicle is absorbed by the energy absorbing member 8 described above. After that, there is an effect that the pedestrian can be surely placed on the upper part of the hood 1 to prevent the secondary obstacle.
[0085]
  Further, the above-described strength setting (setting of load characteristics) of the projecting member 12 can ensure the safety of the pedestrian's legs (does not cause a fracture), and has an effect that the structure is simple and there is no malfunction.
[0086]
  Moreover, since the energy absorbing member 8 described above is located in front of the line L (see FIG. 1) connecting the tip of the bonnet 1 and the tip of the protruding member 12, the impact energy of the pedestrian's knee tilting toward the vehicle side. Is more effectively absorbed by the energy absorbing member 8 described above, and the pedestrian's legs can be protected from impact.
[0087]
  In addition, since the above-mentioned vehicle width direction member is set to the bumper reinforcement 7, the existing member (bumper reinforcement 7) extending in the vehicle width direction can be effectively used.
[0088]
  Moreover, since the front-end | tip part of the above-mentioned protrusion member 12 was located ahead or back from the front-end | tip of the energy absorption member 8, it walks below a pedestrian's knee by the protrusion member 12 at the time of a collision with a vehicle and a pedestrian. There is an effect that a person's foot can be paid reliably.
[0089]
  In addition, since the energy absorption amount of the protruding member 12 (see the characteristic a in FIG. 4) is set larger than the energy absorption amount of the energy absorbing member 8 (see the characteristic b in FIG. 5), The pedestrian can be surely removed from its lower leg.
[0090]
  Further, since the protruding member 12 is formed of a resin member, the moldability of the protruding member 12 and the assembling property of the protruding member 12 with respect to the vehicle are improved, and the compatibility with the vehicle design is improved. There is an effect that can.
[0091]
  Further, since the energy absorbing member 8 described above is configured by any one of the energy absorber member, the resin structure, and the damping device (configured by the EA member in this embodiment), the stage before the pedestrian contacts the bonnet 1 In the above, the energy absorbing member 8 can absorb energy reliably, the pedestrian's tilting speed can be reduced, and the pedestrian can be more reliably placed on the hood 1. is there.
[0092]
  Furthermore, since the above-described protruding member 12 is attached to the vehicle body-side strength member (see the front cross member 10) at the front of the vehicle body, the load from the front when the vehicle collides with the pedestrian (see arrow x in FIG. 1). ) Can be received by the vehicle body strength member, and the pedestrian can be surely removed by the projecting member 12, and sufficient support strength of the projecting member 12 can be ensured.
[0093]
  In addition, since the above-described protruding member 12 is set to a strength that does not generate a load more than a predetermined value in order to ensure the safety of the pedestrian's foot at the time of the collision, There is an effect of ensuring safety.
[0094]
  In addition, as shown in the embodiment, when the above-described protruding member 12 is formed of a resin structure (honeycomb structure), the collision part between the vehicle and the pedestrian is any part of the front bumper 9 in the vehicle width direction. However, if the projecting member 12 is made of a resin member, the projecting member 12 bends when a load is applied from the lower side to the upper side. This is advantageous.
  In addition, the value of the predetermined load c in the load characteristic a of the protruding member 12 shown in FIG. 4 is set to a predetermined value that does not cause a fracture to the leg of the pedestrian.
[0095]
  6 and 7 show another embodiment of the front body structure of the vehicle. In the previous embodiment, the rear portion of the protruding member 12 was supported by the front cross member 10, but this is shown in FIGS. In the embodiment, a perimeter frame (frame type frame) 23 to which both sides are attached is provided at the lower part of the front side frame 5, and a set bolt 24 is used between the front end portions 23 a and 23 a of the perimeter frame (vehicle body side strength member) 23. The set plate 25 is attached, and the rear portion of the protruding member 12 is supported by the set plate 25. Other configurations are the same as in the previous embodiment.
[0096]
  Even when configured in this manner (corresponding to claims 1 to 5 and 7 to 8), the same operations and effects as in the previous embodiment are obtained. Therefore, in FIGS. The same reference numerals are assigned and detailed description thereof is omitted.
[0097]
  8 and 9 show still another embodiment of the front body structure of the vehicle. In the previous embodiment, the protruding member 12 is made of a resin member. In this embodiment shown in FIGS. A protruding member 28 is formed by a metal round bar 26, for example, an iron pipe along the lower part of the bumper face 3, and support arms 27, 27 for supporting the side member 26 on a front cross member 10 as a vehicle body side strength member. Is configured.
[0098]
  At least the left and right end portions of the extending member 26 are bent so as to follow the back surface shape of the bumper face 3.
  Further, the above-described support arm 27 is constituted by a sheet metal member so that the section thereof becomes a gate shape, and is formed so as to obtain the load characteristic a of FIG. 4 depending on the thickness and the sectional shape of the sheet metal member.
[0099]
  Further, joining pieces 27 a and 27 a are formed at the rear end portion of the support arm 27, and these joining pieces 27 a and 27 a are joined and fixed to the front surface of the front cross member 10. Other configurations are the same as in the previous embodiment.
[0100]
  As described above, according to the embodiment shown in FIGS. 8 and 9 (embodiments corresponding to claims 1 to 4 and 6 to 9), the protruding member 28 described above is provided along the side member 26 along the lower portion of the bumper face 3. Since the side member 26 is provided with a support member (see the support arm 27) that supports the front part of the vehicle body, the projecting member 28 is composed of the side member 26 and the support member (see the support arm 27). There is an effect that can.
[0101]
  In addition, since there exists an effect | action and effect substantially the same as the previous Example about another point, in FIG. 8, FIG. 9, the same code | symbol is attached | subjected to the same part as the previous figure, and the detailed description is abbreviate | omitted.
[0102]
  FIGS. 10 and 11 show still another embodiment of the front body structure of the vehicle. In each of the previous embodiments, the energy absorbing member 8 is made of EA foam such as polystyrene foam, but it is shown in FIGS. In this embodiment, the energy absorbing member 29 is formed integrally with the bumper face 3 with a resin structure.
[0103]
  That is, a plurality of ribs 30, 30 extending in the vehicle width direction at predetermined intervals in the vertical direction are provided in a portion corresponding to the height of the pedestrian's knee on the back surface of the resin bumper face 3, and in the left-right direction. Are provided with a plurality of ribs 31 extending in the vertical direction at a predetermined interval, and a resin structure 32 is formed by a combination of these ribs 30 and 31.
[0104]
  The energy absorbing member 29 is provided at substantially the same height as the bumper reinforcement 7. Further, the energy absorbing member 29 described above is positioned in front of the line L connecting the tip of the bonnet 1 and the tip of the protruding member 12.
[0105]
  Thus, the energy absorbing member 29 is formed so as to obtain the load characteristic b of FIG. 5 according to the thickness, rib density, and direction of the ribs 30, 31 of the ribs 30, 31 described above. Other configurations are the same as in the previous embodiment.
[0106]
  When configured in this manner (corresponding to claims 1 to 5 and 7 to 9), the energy absorbing member 29 can be integrated with the resin bumper face 3, and the number of assembling steps and the number of parts can be reduced. There is an effect that can.
[0107]
  In addition, about other points, such as an energy absorption effect, there exists an effect | action and effect substantially the same as the previous Example, Therefore In FIG. 10, FIG. 11, the same code | symbol is attached | subjected to the same part as the previous figure, and the detail Description is omitted.
[0108]
  FIG. 12 shows still another embodiment of the front body structure of the vehicle. In this embodiment, an energy absorbing member 34 is constituted by an oil damper 33.
  That is, the oil dampers 33 and 33 are attached to the lower part of the front side frames 5 and 5 or the peripheral part thereof, and the bumper reinforcement 7 is removably connected to the piston rods 33a and 33a ends of the oil dampers 33 and 33. 5 so that the load characteristic b shown in FIG. 5 is obtained by the oil damper 33 described above.
[0109]
  In the configuration of FIG. 12, when a vehicle and a pedestrian collide, a load from the front (see arrow x) is input to the protruding member 12 via the resin bumper face 3. This load is usually less than the predetermined load c shown in FIG. 4, and the input load from the front direction is received by the protruding member 12 whose rear portion is supported by the front cross member 10.
[0110]
  For this reason, at the time of a collision between the vehicle and the pedestrian, the pedestrian's knees that are tilted toward the vehicle side are first absorbed by the above-described projecting member 12 below the pedestrian's knees. It is absorbed by the operation of the bumper reinforcement 7 that moves backward by 33, and then the pedestrian can be reliably placed on the upper part of the hood 1 to be protected.
[0111]
  In addition, since there exists an effect | action and effect substantially the same as the previous Example about another point, in FIG. 12, the same code | symbol is attached | subjected to the part same as the previous figure, and the detailed description is abbreviate | omitted.
[0112]
  FIG. 13 shows still another embodiment of the front body structure of the vehicle. However, in FIG. 13, the same parts as those in the previous figure are denoted by the same reference numerals, and detailed description thereof is omitted.
  In the embodiment shown in FIG. 13, a resin bumper face 3 is provided, and the bumper reinforcement 7 (vehicle width direction member) is provided on the back surface of the bumper face 3 so as to correspond to the height position of the pedestrian's knee. An energy absorbing member 40A is integrally provided in front of the.
[0113]
  Further, in the front bumper 9 provided with the bumper face 3, the bumper reinforcement 7, and the energy absorbing member 40A, the rear lower portion of the bumper face 3 extends in the vehicle width direction, and the rear portion is an example of the vehicle body side strength member. The lower leg support member 41A supported by the front cross member 10 is integrally provided. The energy absorbing member 40A and the lower leg support member 41A described above are integrally provided over the entire width of the front bumper 9 in the longitudinal direction (that is, the vehicle width direction).
[0114]
  Here, a perimeter frame (refer to the previous figure) may be used as the vehicle body side strength member instead of the above-mentioned front cross member 10, and furthermore, in a vehicle without the front cross member 10, the front side frame 5 or a stay (not shown) extending downward from the bumper reinforcement 7 can also be used as the vehicle body side strength member.
[0115]
  As shown in FIG. 13, a gap g as a predetermined interval is provided between the back surface of the energy absorbing member 40 </ b> A and the front surface of the bumper reinforcement 7.
  Thus, when the bumper face 3 is displaced rearward at the time of collision between the vehicle and the pedestrian, the gap g becomes zero, and the tip of the lower leg support member 41A is configured to protrude relative to the bumper reinforcement 7. It is a thing. More specifically, in the normal state shown in FIG. 13, the tip of the lower leg support member 41A is located behind the tip of the energy absorbing member 40A, but the bumper face 3 is rearward when the vehicle collides with the pedestrian. When the position is displaced, the gap g described above becomes zero, and the tip of the lower leg support member 41A is configured to protrude forward relative to the tip of the energy absorbing member 40A.
[0116]
  The configuration of the energy absorbing member 40A shown in FIG. 13 is shown in FIGS.
  The energy absorbing member 40A is formed of a synthetic resin (for example, polypropylene) made of the same material as that of the bumper face 3, and is configured to extend in the vehicle width direction of the bumper face 3 in front of the bumper reinforcement 7.
[0117]
  As shown in FIGS. 14 and 15, the energy absorbing member 40 </ b> A described above includes a main portion 42 extending in the vehicle width direction in a state of being vertically oriented, and a plurality of front ribs extending forward from the front surface of the main portion 42. Horizontal ribs 43 and a plurality of vertical ribs 44, and a plurality of horizontal ribs 45 and a plurality of vertical ribs 46 as rear ribs extending rearward from the rear surface of the main body 42 described above.
[0118]
  Moreover, the front ribs (see the horizontal ribs 43) located on the front side have a small energy absorption amount, and the rear ribs (see the horizontal ribs 45) located on the rear side have a large energy absorption amount.
[0119]
  That is, the thickness of the horizontal rib 43 is set to be small and the thickness of the horizontal rib 45 is set to be large, and at least the upper and lower horizontal ribs 43, 43 have a rough (large) gap between the upper and lower ribs. , 45 is set to be close (small).
[0120]
  In combination with the coarse and dense structure of the rib interval, the left and right rib intervals of the vertical ribs 44 and 44 positioned on the front side may be set roughly, and the left and right rib intervals of the vertical ribs 46 and 46 positioned on the rear side may be set densely.
[0121]
  The energy absorbing member 40A configured as described above is integrally bonded and fixed to a predetermined portion on the back surface of the bumper face 3 by means such as heat welding.
  In this energy absorbing member (energy absorbing rib) 40A, the front ribs 43 and 44 indicated by a range d in FIG. 14 are crushed by a small load at the time of collision, and then the rear side indicated by a range e in FIG. Since each of the ribs 45 and 46 is crushed, a substantially step-like energy absorption characteristic f (two-stage energy absorption characteristic) is obtained as shown in FIG. 16, and energy absorption is generally performed with respect to the characteristic b of the previous embodiment. It is configured to increase the amount.
[0122]
  Here, FIG. 16 is a characteristic diagram showing the load characteristics of the energy absorbing member 40A with the amount of deformation (crushing amount) on the horizontal axis and the load (dynamic crushing load) on the vertical axis. The same reference numerals as in FIG.
[0123]
  The structure of the lower leg support member 41A shown in FIG. 13 is shown in FIG. 17, FIG. 18, and FIG.
  The lower leg support member 41 </ b> A is formed of a synthetic resin (for example, polypropylene) made of the same material as the bumper face 3, and is configured to extend in the vehicle width direction along the lower rear surface of the bumper face 3.
[0124]
  As shown in FIGS. 17, 18, and 19, the lower leg support member 41A described above includes a front piece 47 that extends in the up and down direction, a rear piece 48 that extends in the up and down direction, and a front and rear portion between the two pieces 47 and 48 described above. A main body portion 50 having a substantially H-shaped cross section formed by integrally combining a main piece 49 extending in the direction is provided, and a plurality of upper ribs 51 in the front-rear direction extending upward from the upper surface of the main piece 49 in the main body portion 50 and the vehicle An upper rib 52 in the width direction, a plurality of lower ribs 53 in the front-rear direction and a plurality of lower ribs 54 in the vehicle width direction that extend downward from the lower surface of the main piece 49 in the main body 50 are provided.
[0125]
  The front-rear spacing between the elements 47, 52, 48 and the left-right spacing between the upper ribs 51, 51 are set roughly on the upper side of the main piece 49, and the elements 47, 54 are set on the lower side of the main piece 49. , 48 and the left-right distance between the lower ribs 53, 53 are set closely.
[0126]
  Further, a clearance c1 (or a notch portion) is formed as a bending allowance securing means between the rear end of the upper rib 51 located on the front side and the front end of the upper rib 52, and the rear end and lower portion of the lower rib 53 are formed. A clearance c2 (or a notch) as a bending allowance securing means is formed between the rib 54 and the front surface of the rear piece 48, and these clearances c1 and c2 allow the lower leg support member when a load is input from the road side. It is configured so as to secure the deflection of 41A and to make it effective in relation to the approach angle. That is, the lower leg support member 41A is configured to be bent upward with the resin bumper face 3 in response to load input from the road side.
[0127]
  The lower leg support member 41A configured as described above is integrally bonded and fixed to a predetermined portion of the back surface of the bumper face 3 by means such as heat welding.
[0128]
  FIG. 20 shows the load characteristics of the lower leg support member 41A, with the horizontal axis representing the deformation (crushing amount) and the vertical axis representing the load (dynamic crushing load). The load characteristic a of the lower leg support member 41A gradually increases within a small amount of deformation when the input load (unit Newton) is between zero and the predetermined load c, but when the input load reaches the predetermined load c, deformation occurs. The amount is set to be maximum and constant.
[0129]
  Moreover, the value of the predetermined load c of the load characteristic a can be arbitrarily and easily adjusted as indicated by a virtual line in FIG. 20 by changing the thickness and density of the ribs 51 to 54 described above.
[0130]
  Further, the energy absorption amount of the lower leg support member 41A shown in FIG. 13 (see the load characteristic a in FIG. 20) is set larger than the energy absorption amount of the energy absorption member 40A (see the load characteristic f in FIG. 16). In the figure, F indicates the front of the vehicle.
[0131]
  The operation of the front body structure of the vehicle configured as described above will be described.
  At the time of a collision between the vehicle and the pedestrian, the load indicated by the arrow x in FIG. 13 is input to the front bumper 9, so that the resin bumper face 3 is first displaced rearward and the gap g shown in FIG. 13 becomes zero. Thus, the tip of the lower leg support member 41A protrudes relatively forward.
[0132]
  Thereby, the lower leg support member 41A pays the pedestrian's foot below the pedestrian's knee, and the energy absorbing member 40A extending the impact energy of the pedestrian's knee tilting toward the vehicle side in the vehicle width direction has two stages ( After absorption in FIG. 16), the pedestrian is securely placed on the upper part of the bonnet 1 for protection.
[0133]
  As described above, according to the embodiments shown in FIGS. 13 to 20 (embodiments corresponding to claims 10 to 14 and 16 to 19), the bumper face 3 is located behind the bumper face 3, and the vehicle A front bumper 9 provided with a vehicle width direction member (see bumper reinforcement 7) fixed to a vehicle body frame (see front cross member 10) is provided, and a rear portion of the front bumper 9 extends in the vehicle width direction and a rear portion thereof. Is provided with a lower leg support member 41A supported by a vehicle body side strength member (see the front cross member 10), and the upper part of the bumper face 3 is positioned forward of a line L connecting the tip of the bonnet 1 and the tip of the lower leg support member 41A. In addition, the energy absorbing member 40A provided in front of the vehicle width direction member (see the bumper reinforcement 7) and the vehicle width direction member(Bumper reinforcement 7)BetweenWhen the bumper face 3 is displaced rearward, the tip of the lower leg support member 41A protrudes relatively forward from the tip of the energy absorbing member 40A.Since the interval (see the gap g) is provided, the following effects are obtained.
[0134]
  That is, at the time of a collision between a vehicle and a pedestrian, first, the bumper face 3 is displaced backward,The interval is reduced or zero,As a result, the tip of the lower leg support member 41A isTip of energy absorbing member 40AMore relativeForwardThe lower leg support member 41A that protrudes and is supported by the vehicle body side strength member (see the front cross member 10) receives the load from the front direction (see arrow x in FIG. 13). There is an effect that a secondary obstacle can be prevented by paying the pedestrian's foot below the pedestrian's knee and placing the pedestrian leaning toward the vehicle side on the hood 1 without fail.
[0135]
  In addition, the strength setting (load characteristic setting) of the lower leg support member 41A described above can ensure the safety of the pedestrian's legs (no fracture), and the structure is simple and has no malfunction. The design of the front bumper 9 is not restricted and the assembling property can be improved.
[0136]
  Moreover, between the energy absorbing rib (see energy absorbing member 40A) and the bumper reinforcement 7AboveInterval (see gap g)That is, when the bumper face 3 is displaced rearward, the gap g such that the tip of the lower leg support member 41A protrudes relatively forward from the tip of the energy absorbing member 40A.), When the bumper face 3 is displaced backward (when the vehicle collides with a pedestrian), the lower leg support member 41AForwardAs a result, the pedestrian can be surely removed from the lower leg portion.
[0137]
  Further, since the above-mentioned vehicle width direction member is set to the bumper reinforcement 7, there is no need to newly provide another member extending in the vehicle width direction, and the existing member can be effectively used.
[0138]
  In addition, the amount of energy absorbed by the lower leg support member 41A (see FIG. 20) is converted into the amount of energy absorbed by the energy absorbing member 40A provided at the front of the vehicle width direction member (see bumper reinforcement 7) (see FIG. 16). Therefore, the pedestrian can be surely removed from the lower leg, and the impact energy of the pedestrian's knee tilting to the vehicle side is absorbed well by the energy absorbing member 40A. There is an effect that can.
[0139]
  Further, since the energy absorbing member 40A described above is configured by the ribs 43 to 46 provided integrally with the bumper face 3, the amount of energy absorption can be increased, and energy can be controlled by controlling the rib thickness and rib density. There is an effect that the amount of absorption can be easily adjusted.
[0140]
  Furthermore, since the lower leg support member 41A described above is composed of the ribs 51 to 54, the upper ribs 51 and 52 are coarsely spaced and the lower ribs 53 and 54 are closely spaced, so that the lower leg support is supported when a load is input from the road side. The bending of the member 41A can be ensured and is effective in relation to the approach angle.
  Incidentally, when the rib interval is close both in the upper and lower directions, the bending of the lower leg support member is hindered.
[0141]
  On the other hand, the energy absorbing member 40A described above has front ribs 43 and 44 and rear ribs 45 and 46, the energy absorption amount of the front ribs 43 and 44 is small, and the energy absorption amount of the rear ribs 45 and 46 is small. Since it is formed so as to be large, the impact shock (impact energy of the knee) is softened at the initial stage, and then a certain amount of energy absorption can be obtained.
  In particular, a substantially step-like energy absorption characteristic f (see FIG. 16) can be obtained, and the energy absorption amount can be increased as a whole, and the energy absorption load can be easily adjusted by using ribs. effective.
[0142]
  In addition, since the thickness of the front ribs 43 and 44 in the energy absorbing member 40A is set to be small and the thickness of the rear ribs 45 and 46 is set to be large, a reliable energy absorption amount can be obtained while softening the shock at the beginning of the collision. There is an effect that can be secured.
[0143]
  Further, in the energy absorbing member 40A, the interval between the front ribs 43 and 44 is set to be rough, and the interval between the rear ribs 45 and 46 is set to be dense. There is an effect that can.
[0144]
  21 and 22 show another embodiment of an energy absorbing member (energy absorbing rib) that is opposed to the bumper reinforcement 7 and is integrally welded to the back surface of the bumper face 3.
[0145]
  The energy absorbing member 40B is made of a synthetic resin (for example, polypropylene) made of the same material as the bumper face 3, and is configured to extend in the vehicle width direction of the bumper face 3 in front of the bumper reinforcement 7.
[0146]
  As shown in FIGS. 21 and 22, the energy absorbing member 40 </ b> B described above includes a main portion 55 extending in the vehicle width direction in a state of being vertically oriented, and a plurality of front ribs extending forward from the front surface of the main portion 55. And a plurality of vertical ribs 57, and a plurality of horizontal ribs 58 and a plurality of vertical ribs 59 as rear ribs extending rearward from the rear surface of the main body 55.
[0147]
  Here, the horizontal rib 56 extending forward is formed in a tapered shape with a thin tip and a thick rear end.
  Moreover, the front ribs (see the horizontal ribs 56) located on the front side have a small energy absorption amount, and the rear ribs (see the horizontal ribs 58) located on the rear side have a large energy absorption amount.
[0148]
  That is, the thickness (cross-sectional area) of the horizontal rib 56 is set to be small, the wall thickness (cross-sectional area) of the horizontal rib 58 is set to be large, and the left and right rib intervals of the vertical ribs 57 and 57 located on the front side are coarse (large). ), The distance between the left and right ribs of the vertical ribs 59, 59 located on the rear side is set to be small (small).
  The energy absorbing member 40B configured as described above is integrally joined and fixed to a predetermined portion of the back surface of the bumper face 3 by means such as heat welding.
[0149]
  In the energy absorbing member (energy absorbing rib) 40B, the front ribs 56 and 57 indicated by the range m in FIG. 21 are crushed by a small load at the time of collision, and then the rear side indicated by the range n in FIG. 21 by a large load. As shown in FIG. 23, a substantially step-like energy absorption characteristic h (two-stage energy absorption characteristic) is obtained, and overall, the characteristic b of the previous embodiment is obtained. The energy absorption amount is increased.
[0150]
  Here, FIG. 23 is a characteristic diagram showing the load characteristics of the energy absorbing member 40B, with the amount of deformation (crushing amount) on the horizontal axis and the load (dynamic crushing load) on the vertical axis. The same reference numerals as in FIG.
  Even when the energy absorbing member 40B (corresponding to claims 17 to 19) shown in FIGS. 21 to 23 is used, the same operations and effects as those of the previous embodiment are obtained.
[0151]
  24, 25, and 26 show still another embodiment of an energy absorbing member (energy absorbing rib) that is integrally welded and fixed to the back surface of the bumper face 3 so as to face the bumper reinforcement 7.
[0152]
  The energy absorbing member 40 </ b> C is formed of a synthetic resin (for example, polypropylene) made of the same material as the bumper face 3, and is configured to extend in the vehicle width direction of the bumper face 3 in front of the bumper reinforcement 7.
[0153]
  As shown in FIGS. 24, 25, and 26, the energy absorbing member 40 </ b> C described above extends in multiple stages forward from the main body portion 60 extending in the vehicle width direction in a state of being vertically oriented, and from the front surface of the main body portion 60. A plurality of horizontal ribs 61, 62, 63, 64 and vertical ribs 65, 66, 67 extending between the horizontal ribs in the vertical direction are provided.
[0154]
  Here, each of the ribs 61, 62, 65 described above functions as a front rib, each of the ribs 63, 66 functions as an intermediate rib, and each of the ribs 64, 67 functions as a rear rib.
  In this energy absorbing member (energy absorbing rib) 40C, a portion indicated by a range r in FIG. 24 is crushed by a small load at the time of collision, and then a portion indicated by a range s in FIG. 24 is crushed by a medium load. 24, the portion indicated by the range t in FIG. 24 is collapsed, so that a substantially step-like energy absorption characteristic j (three-stage energy absorption characteristic) as shown in FIG. 27 is obtained, and the characteristics of the previous embodiment are generally obtained. The energy absorption amount is increased with respect to b.
[0155]
  FIG. 27 is a characteristic diagram showing the load characteristics of the energy absorbing member 40C with the amount of deformation (crushing amount) on the horizontal axis and the load (dynamic crushing load) on the vertical axis. For convenience of explanation, FIG. The same reference numerals are attached.
[0156]
  The energy absorbing member 40C configured as described above is integrally joined and fixed to a predetermined portion on the back surface of the bumper face 3 by means such as heat welding.
  Even if the energy absorbing member 40C (corresponding to claims 13 and 17) shown in FIGS. 24 to 27 is used, the same operations and effects as those of the previous embodiment are obtained.
[0157]
  28, 29, and 30 show another embodiment of the lower leg support member whose rear portion is supported by the vehicle body side strength member. 28 to 30, the same parts as those in FIGS. 17 to 19 are denoted by the same reference numerals.
  However, in the case of this embodiment, the lower leg support member 41B is constituted by a rib, the thickness of the upper rib 52 is set to be small, and the thickness of the lower rib 54 is set to be large.
[0158]
  28 to 30 (an embodiment corresponding to claim 15), the above-described lower leg support member 41B is composed of the ribs 51 to 54, and the thickness of the upper rib 52 is reduced, and the lower rib is reduced. Since the thickness of 54 is set to be large, it is possible to ensure the bending of the lower leg support member 41B when a load is input from the road side, which is advantageous in relation to the approach angle.
  Incidentally, when the rib thickness is large both in the upper and lower directions, the bending of the lower leg support member is hindered. In addition, about the other point, there exists an effect | action and effect substantially the same as the previous Example.
[0159]
  31, 32 and 33 show still another embodiment of the lower leg support member whose rear portion is supported by the vehicle body side strength member. In FIG. 31 to FIG. 33, the same parts as those in FIG. 17 to FIG.
[0160]
  In the embodiment shown in FIGS. 31 to 33, a main body portion 50 having a substantially H-shaped cross section is provided, and a plurality of upper and lower upper ribs 68, 69, 70 extending upward from the upper surface of the main piece 49 in the main body portion 50. Further, the upper ribs 71 and 72 in the vehicle width direction, the plurality of lower ribs 73, 74, 75, and 76 in the front-rear direction extending downward from the lower surface of the main piece 49 in the main body 50 and the plurality of lower ribs in the vehicle width direction. 77, 78, 79.
[0161]
  The front-rear spacing between the elements 47, 71, 72, 48, and the left-right spacing between the upper ribs 68, 68, 69, 69, and 70, 70 are set roughly on the upper side of the main piece 49. On the lower side of the main piece 49, the front-rear spacing of the elements 47, 77, 78, 79, 48 and the left-right spacing between the lower ribs 73, 73, 74, 74, 75, 75, 76, 76 are close. Is set.
[0162]
  Furthermore, the upper ribs 68 and 70 are set to a height substantially flush with the upper ends of the upper ribs 71 and 72, and the height of the upper rib 69 located in the middle in the front-rear direction is less than the height of the upper ribs 68 and 70. (In this embodiment, the height is about ½).
[0163]
  Similarly, the lower ribs 73 and 76 are set to a protruding amount that is substantially flush with the lower ends of the lower ribs 77, 78, and 79, and the protruding amount of the lower ribs 74 and 75 that are located in the middle in the front-rear direction is the lower rib 73, 76. The protrusion amount is set to be less than 76 (in this embodiment, approximately one-half protrusion amount). That is, the above-described ribs 69, 74, and 75 are set as bending allowance securing means.
[0164]
  In this way, by setting the height of the upper rib 69 located in the middle in the front-rear direction and the protruding amount of the lower ribs 74 and 75 to a small value, the clearances c1 and c1 in FIGS. 17 to 19 and FIGS. Without having c2, it is configured to exhibit the same effect as when the clearances c1 and c2 are provided.
[0165]
  That is, by setting the height of the upper rib 69 to be low and the amount of protrusion of the lower ribs 74 and 75 to be small, the bending of the lower leg support member 41C is ensured when a load is input from the road side, and the relationship with the approach angle. It is configured to enable the above.
[0166]
  The lower leg support member 41 </ b> C configured in this manner is integrally joined and fixed to a predetermined portion on the back surface of the bumper face 3 by means such as heat welding.
  Even if the lower leg support member 41C (corresponding to claims 12 and 16) shown in FIGS. 31 to 33 is used, substantially the same operations and effects as in the previous embodiment are achieved.
[0167]
  In each of the embodiments shown in FIGS. 13 to 33, the ribs of the energy absorbing members 40A, 40B, and 40C and the lower leg support members 41A, 41B, and 41C are formed in a lattice shape (that is, a cross shape) at an intersecting angle of 90 degrees. However, each of these ribs may be combined in an X shape, or may be formed in a honeycomb shape, and only at least a part of the rib is inclined at a predetermined angle. However, it may be formed so as to control the load to be constant.
[0168]
  Further, the energy absorbing members 40A, 40B, and 40C and the lower leg support members 41A, 41B, and 41C that are integrally provided with the bumper face 3 are arbitrarily selected from the respective embodiments, for example, a combination of 40A and 41C, 40B and 41A, and the like. It can be arbitrarily configured as a combination with.
[0169]
  Furthermore, any one of the lower leg support members 41A, 41B, 41C may be combined with the energy absorbing member 8 described above.
  In addition, the configuration in which the bumper face 3 and the energy absorbing members 40A, 40B, and 40C and the lower leg support members 41A, 41B, and 41C are integrated may be other joining means such as an adhesive means instead of the welding means. Good.
[0170]
  In the correspondence between the configuration of the present invention and the above-described embodiment,
  The bumper of the present invention corresponds to the front bumper 9 of the embodiment,
  Similarly,
  The vehicle width direction member corresponds to the bumper reinforcement 7,
  The support member corresponds to the support arm 27,
  The damping device corresponds to the oil damper 33,
  The vehicle body side strength member corresponds to the front cross member 10, the perimeter frame 23 or the stay,
  The predetermined distance between the energy absorbing rib and the bumper reinforcement corresponds to the gap g,
  The present invention is not limited to the configuration of the above-described embodiment.
[0171]
  For example, as a constituent material of the resin-made protruding member 12, a nylon resin may be used instead of PP and PE. Further, instead of the structure in which the support arm 27 is configured by a sheet metal member, the arm 27 may be configured by a resin structure, and the installed member 26 may be a resin round bar instead of the metal round pipe. Of course.
[0172]
  Further, the resin material constituting the bumper face 3, the energy absorbing members 40A, 40B, and 40C and the lower leg support members 41A, 41B, and 41C is not limited to PP.
[Brief description of the drawings]
FIG. 1 is a side view showing a front body structure of a vehicle according to the present invention.
FIG. 2 is a schematic perspective view of a main part of FIG.
FIG. 3 is a perspective view showing a configuration of a protruding member.
FIG. 4 is an explanatory diagram showing load characteristics of a protruding member.
FIG. 5 is an explanatory diagram showing load characteristics of an energy absorbing member.
FIG. 6 is a side view showing another embodiment of the front body structure of the vehicle of the present invention.
FIG. 7 is a perspective view of a perimeter frame.
FIG. 8 is a side view showing still another embodiment of the front body structure of the vehicle of the present invention.
9 is a perspective view of the main part of FIG.
FIG. 10 is a side view showing still another embodiment of the front body structure of the vehicle of the present invention.
11 is a perspective view of the main part of FIG.
FIG. 12 is a side view showing still another embodiment of the front body structure of the vehicle of the present invention.
FIG. 13 is a side view showing still another embodiment of the front body structure of the vehicle of the present invention.
14 is an enlarged cross-sectional view of a main part of FIG.
FIG. 15 is a partial perspective view of the energy absorbing member.
FIG. 16 is an explanatory diagram showing load characteristics of the energy absorbing member.
17 is an enlarged cross-sectional view of a main part of FIG.
18 is a cross-sectional view taken along line DD in FIG.
19 is a cross-sectional view taken along line EE in FIG.
FIG. 20 is an explanatory diagram showing load characteristics of the lower leg support member.
FIG. 21 is a sectional view showing another embodiment of the energy absorbing member.
FIG. 22 is a partial perspective view of the energy absorbing member.
FIG. 23 is an explanatory diagram showing load characteristics of the energy absorbing member.
FIG. 24 is a sectional view showing another embodiment of the energy absorbing member.
FIG. 25 is a partial perspective view of the energy absorbing member.
FIG. 26 is a front view of the energy absorbing member.
FIG. 27 is an explanatory diagram showing load characteristics of the energy absorbing member.
FIG. 28 is a cross-sectional view showing another embodiment of the lower leg support member.
29 is a cross-sectional view taken along line GG in FIG. 28.
30 is a cross-sectional view taken along line HH in FIG. 28.
FIG. 31 is a sectional view showing another embodiment of the lower leg support member.
32 is a cross-sectional view taken along the line PP in FIG. 28. FIG.
33 is a cross-sectional view taken along the line Q-Q in FIG. 28.
[Explanation of symbols]
  L ... Line
  1 ... Bonnet
  3 ... Bumper face
  7… Bumper reinforcement (vehicle width direction member)
  8. Energy absorbing member
  9 ... Front bumper (bumper)
  10. Front cross member (strength member)
  12 ... Projection member
  23 ... Perimeter frame (strength member)
  26 ... Installation material
  27 ... Support arm (support member)
  28 ... Projection member
  29 ... Energy absorbing member
  32. Resin structure
  33 ... Oil damper (attenuator)
  34 ... Energy absorbing member
  40A, 40B, 40C ... energy absorbing member
  41A, 41B, 41C ... lower leg support member
  43-46 ... ribs
  51-54 ... ribs
  56-59 ... ribs
  61-67 ... ribs
  68-79 ... ribs
  g ... Gap( while(Distance)

Claims (19)

A vehicle front body structure with a bumper at the front lower part of the vehicle bonnet,
A vehicle width direction member at the front of the vehicle body;
An energy absorbing member provided at a front portion of the vehicle width direction member;
A projecting member provided at a lower portion of the bumper and having a tip projecting forward from the vehicle width direction member;
A bumper face is disposed on the front side of the vehicle width direction member and the protruding member, and
A vehicle front body structure in which the energy absorbing member is positioned in front of a line connecting a tip of a bonnet and a tip of a protruding member. The vehicle front body structure according to claim 1, wherein the vehicle width direction member at the front of the vehicle body is set to a bumper reinforcement. The front body structure of a vehicle according to claim 1, wherein a front end portion of the protruding member is positioned in front of or behind the front end of the energy absorbing member. 2. The front body structure of a vehicle according to claim 1, wherein an energy absorption amount of the protruding member is set larger than an energy absorption amount of the energy absorption member. The vehicle front body structure according to claim 1, wherein the protruding member is formed of a resin member. 2. The front body structure of a vehicle according to claim 1, wherein the projecting member includes a side member extending along a lower portion of the bumper face, and a support member for supporting the side member on the front portion of the vehicle body. The vehicle front body structure according to claim 1, wherein the energy absorbing member is constituted by any one of an energy absorber member, a resin structure, and a damping device. 2. The vehicle front body structure according to claim 1, wherein the protruding member is attached to a vehicle body strength member at a vehicle front portion. 2. The front body structure of a vehicle according to claim 1, wherein the protruding member is set to have a strength that does not generate a load more than a predetermined amount in order to ensure the safety of a pedestrian's foot during a collision. A vehicle front body structure with a bumper at the front lower part of the vehicle bonnet,
The bumper includes a bumper face and a vehicle width direction member positioned behind the bumper face and fixed to a vehicle body frame of the vehicle,
The lower part of the bumper is provided with a lower leg support member that extends in the vehicle width direction and whose rear part is supported by the vehicle body strength member,
An upper portion of the bumper face is positioned in front of a line connecting the tip of the bonnet and the tip of the lower leg support member, and an energy absorbing member provided in front of the vehicle width direction member, the vehicle width direction member, between, when the bumper face is displaced rearwardly, a front body structure of a vehicle front end of the lower Ashisa port member is spaced so as to project into the relatively forward from the distal end of the energy absorbing member. The vehicle front body structure according to claim 10, wherein the vehicle width direction member is set to a bumper reinforcement. An energy absorbing member provided at a front portion of the vehicle width direction member;
The vehicle front body structure according to claim 10, wherein an energy absorption amount of the lower leg support member is set larger than an energy absorption amount of the energy absorption member. The vehicle front body structure according to claim 12, wherein the energy absorbing member is constituted by a rib provided integrally with a bumper face. The energy absorbing member is composed of energy absorbing ribs,
The vehicle front body structure according to claim 12 or 13, wherein a predetermined gap is provided between the energy absorbing rib and the bumper reinforcement. 11. The vehicle front body structure according to claim 10, wherein the lower leg support member is formed of a rib, and the thickness of the upper rib is set to be small and the thickness of the lower rib is set to be large. The vehicle front body structure according to claim 10, wherein the lower leg support member is formed of ribs, and the intervals between the upper ribs are set coarsely and closely to the intervals between the lower ribs. The energy absorbing member includes a front rib and a rear rib,
15. The front body structure of a vehicle according to claim 12, 13 or 14, wherein the energy absorption amount of the front rib is small and the energy absorption amount of the rear rib is large. 18. The front body structure of a vehicle according to claim 17, wherein the thickness of the front rib is set small and the thickness of the rear rib is set large. 18. The front body structure of a vehicle according to claim 17, wherein the rib interval of the front ribs is set roughly and the rib interval of the rear ribs is set close.

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