JP2006044310A - Simple type pedestrian protecting bumper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple type pedestrian protecting bumper having a wide degree of freedom in application, capable of securing the protecting performance for the legs of a pedestrian using a low-cost constitution. <P>SOLUTION: A front bumper cover 14 is split into a front bumper cover upper 18 and a front bumper cover lower 20, and on the rear surface of the cover upper 18, a rod 24 furnished with a load receptacle part 24 is installed movably in the front-rear direction of a vehicle. The tail 24B of the rod 24 is coupled by a pin 40 with the top of a pay-out member 32 whose bottom is coupled with the cover lower 20 and which is borne by a pin 34. Accordingly when the front bumper 12 contacts with an impactor 42, the load is fed from the cover upper 18 to a load receptacle part 26, and the rod 24 moves toward the rear of the vehicle, and the pay-out member 32 is rotated round the pin 34 toward the front of the vehicle. As a result, the cover lower 20 supports the lower part 42B of the impactor 42. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicular bumper configured to include a long bumper reinforcement arranged with the vehicle width direction as a longitudinal direction, and a bumper cover arranged outside the bumper reinforcement to form a design surface. It is related with the applied simple pedestrian protection bumper.

  In recent years, as part of pedestrian protection measures, various active bumper devices have been proposed in which, when a collision is predicted by a collision prediction sensor, an actuator is activated to project a part or all of the front bumper by a predetermined amount toward the front side of the vehicle. .

  However, the active bumper device only requires a sensor (millimeter wave radar, stereo camera, etc.) for predicting a collision with a pedestrian or a sensor (touch sensor, etc.) for detecting a collision with a pedestrian. In addition, a controller for operating the active bumper device based on these sensors and a driving means for projecting a part or all of the front bumper to the front side of the vehicle are required. There is.

  Therefore, whether or not it is possible to effectively protect the pedestrian's legs by a simple method is being considered, rather than setting these large-scale configurations.

The technology disclosed in the following Patent Document 2 is in line with the above-mentioned purpose. In this technology, on the premise that a pedestrian protection bumper is provided at the front end of the vehicle separately from the front bumper. It is not applicable to vehicles that do not have a pedestrian protection bumper because the dozer type pedestrian protection means is mechanically extended to the front side of the vehicle in conjunction with the movement of the pedestrian protection bumper at the time of a collision with the vehicle. .
JP 2000-255350 A JP 2001-1848 A

  An object of the present invention is to obtain a simple pedestrian protection bumper that can secure a protection performance for a pedestrian's legs with a low-cost configuration and that has a high degree of freedom in application.

  The simplified pedestrian protection bumper according to the present invention as set forth in claim 1 is a long bumper reinforcement arranged with the vehicle width direction as a longitudinal direction, and a bumper that is arranged outside the bumper reinforcement and forms a design surface. A simple pedestrian protection bumper applied to a vehicle bumper, the bumper cover comprising: a bumper cover upper part constituting an upper cover part; and a bumper cover lower part constituting a lower cover part; The bumper cover is arranged on the back side of the bumper cover so as to be movable in the longitudinal direction of the vehicle, and the load receiving portion is arranged between the back side of the bumper cover and the bumper reinforcement. A load transmitting member that is displaced in the load input direction when a load is input from the upper part to the load receiving part, and one end part is connected to the lower part of the bumper cover. A feeding member that is fixed and has the other end connected or locked to the rear end of the load transmitting member so as to be relatively rotatable, and further pivotally supported between the one end and the other end. It is characterized by having.

  The simplified pedestrian protection bumper according to the second aspect of the present invention is the simple pedestrian protection bumper according to the first aspect of the present invention, wherein the distance between the one end of the feeding member and the shaft fulcrum of the feeding member is the same as that of the load transmitting member and the feeding. It is characterized in that it is set sufficiently long with respect to the distance between the connection or locking point with the other end of the member and the pivot point of the feeding member.

  The simplified pedestrian protection bumper according to a third aspect of the present invention is the simple pedestrian protection bumper according to the first or second aspect, wherein the one end portion of the feeding member and the lower bumper cover are connected so as to be relatively rotatable. It is characterized by that.

  A simple pedestrian protection bumper according to a fourth aspect of the present invention is the invention according to any one of the first to third aspects, wherein the load transmitting member is disposed in a state of penetrating the bumper reinforcement. The bumper reinforcement is provided with guide means for guiding the load transmission member in the vehicle longitudinal direction.

  The simplified pedestrian protection bumper according to the present invention described in claim 5 is the invention according to any one of claims 1 to 4, wherein at least one of the load transmission member and the bumper reinforcement has the load transmission. A lock means is provided for preventing the load transmitting member from moving in the return direction when the member moves a predetermined stroke in the load input direction.

  The simplified pedestrian protection bumper according to the present invention described in claim 6 is the invention according to any one of claims 1 to 5, wherein the load receiving portion has a predetermined gap with respect to the wall surface of the bumper reinforcement. The load receiving part is elastically deformed between the load receiving part and the back surface of the upper part of the bumper cover until the load receiving part comes into contact with the wall surface of the bumper reinforcement. After contacting the wall surface of the bumper reinforcement, an elastic-plastic member that absorbs energy by compressing plastic deformation is set.

  A simplified pedestrian protection bumper according to a seventh aspect of the present invention is the invention according to any one of the first to fourth aspects or the sixth aspect, wherein the other end portion of the feeding member is bent in a side view. A long hole having a shape is formed, and the other end portion of the feeding member and the rear end portion of the load transmitting member are connected to each other so as to be relatively rotatable around a connecting shaft in the long hole, When the feeding member rotates around the shaft fulcrum and the lower part of the bumper cover is fed out by a predetermined amount, the connecting shaft is locked to the bent portion of the long hole, and the reverse operation of the load transmitting member is prevented. It is said.

  According to the first aspect of the present invention, the bumper cover is divided into an upper bumper cover that constitutes the upper part of the cover and a lower bumper cover that constitutes the lower part of the cover. When the end contacts, the contact load at that time is input to the upper part of the bumper cover. For this reason, if the present invention is applied to the front bumper, the upper part of the bumper cover is pressed to the rear side of the vehicle, and the rear side of the load transmitting member disposed along the front-rear direction of the vehicle is placed on the rear side of the vehicle. The load to is input. As a result, the load transmitting member moves toward the vehicle rear side, which is the load input direction, and presses the other end of the feeding member toward the vehicle rear side. As a result, the feeding member rotates about the pivot point and feeds the lower part of the bumper cover connected or fixed to one end of the feeding member to the front side of the vehicle. This supports the pedestrian's legs (particularly the lower knee). If the present invention is applied to a rear bumper, the above operation is performed in the reverse direction.

  Thus, in the present invention, since the lower part of the bumper cover is mechanically extended when the leg part of the pedestrian comes into contact with the upper part of the bumper cover, a sensor or controller for predicting a collision with the pedestrian In addition, driving means and the like become unnecessary. Therefore, significant cost reduction can be achieved.

  Furthermore, in the present invention, since the configuration is established in relation to the bumper cover provided at the front end portion or the rear end portion of the vehicle, the vehicle walks to the front end portion of the vehicle separately from the front bumper as in the prior art. It can be applied even if the vehicle is not equipped with a person protection bumper. Therefore, the degree of freedom of application increases.

  According to the second aspect of the present invention, the distance between the one end portion of the feeding member and the shaft fulcrum of the feeding member is determined by connecting or locking the load transmitting member and the other end of the feeding member and the shaft fulcrum of the feeding member. Therefore, even if the load transmitting member moves slightly, the feeding member is quickly fed to the vehicle front side or the vehicle rear side.

  According to the third aspect of the present invention, since the one end portion of the feeding member and the lower bumper cover are connected to each other so as to be relatively rotatable, the posture of the lower bumper cover fed by the turning operation of the feeding member is stably maintained. be able to.

  According to the fourth aspect of the present invention, the load transmitting member is disposed in a state of penetrating the bumper reinforcement, and the bumper reinforcement is provided with guide means for guiding the movement of the load transmitting member in the vehicle front-rear direction. Therefore, it is possible to prevent the load transmission member from being twisted during the movement.

  According to the fifth aspect of the present invention, since the lock means is provided in at least one of the load transmission member and the bumper reinforcement, when the load transmission member moves a predetermined stroke in the load input direction, the load transmission member returns at that time. It is prevented from moving in the direction. For this reason, it can prevent that a feeding member is pushed back by the reaction force from the leg part of a pedestrian inputted into a bumper cover lower part.

  According to the present invention as set forth in claim 6, the load receiving portion is disposed close to the wall surface of the bumper reinforcement with a predetermined gap, and between the load receiving portion and the back surface of the upper portion of the bumper cover. An elastic-plastic member is set. For this reason, at the initial stage of contact with the leg part of the pedestrian, the elastic-plastic member is elastically deformed until the load receiving part comes into contact with the wall surface of the bumper reinforcement, and during this time, the feeding operation of the lower part of the bumper cover by the feeding member is completed.

  Subsequently, when a load is still input to the load receiving portion, the elastic-plastic member is compressed and plastically deformed to absorb energy at the time of contact.

  According to the seventh aspect of the present invention, a long hole bent in a side view is formed in the other end portion of the feeding member, and the other end portion of the feeding member and the load transmission member are formed in the long hole. And a rear end portion thereof are connected so as to be relatively rotatable around a connecting shaft.

  Here, in the present invention, when the feeding member rotates around the shaft fulcrum and the lower part of the bumper cover is fed out by a predetermined amount, the connecting shaft is locked to the bent portion of the long hole and the reverse operation is prevented. Even if the reaction force from the pedestrian's legs is input to the lower part of the bumper cover, the load transmitting member cannot move to the vehicle front side or the vehicle rear side. Therefore, it is possible to eliminate the locking means.

  As described above, the simplified pedestrian protection bumper according to the first aspect divides the bumper cover into a bumper cover upper part that constitutes the upper part of the cover and a bumper cover lower part that constitutes the lower part of the cover. It is arranged on the back side so as to be movable along the longitudinal direction of the vehicle, and a load receiving part is arranged between the back side of the upper part of the bumper cover and the bumper reinforcement, and a load is input from the upper part of the bumper cover to the load receiving part. A load transmitting member that displaces in the load input direction, and one end is connected or fixed to the lower part of the bumper cover, and the other end is connected or locked to the rear end side of the load transmitting member so as to be relatively rotatable. Since it has a feeding member that is pivotally supported between the part and the other end part, it is possible to secure the protection performance for the leg part of the pedestrian with a low-cost configuration, It has an excellent effect that the high degree of freedom of duck apply.

  A simplified pedestrian protection bumper according to a second aspect of the present invention is the simple pedestrian protection bumper according to the first aspect, wherein the distance between one end of the feeding member and the pivot point of the feeding member is the other end of the load transmitting member and the feeding member. Since the distance between the connecting or locking point to the portion and the shaft fulcrum of the feeding member is set to be sufficiently long, the feeding member can be quickly moved to the vehicle front side or vehicle rear side even if the load transmission member moves slightly. As a result, the detection sensor for predicting a collision with a pedestrian can be eliminated.

  The simplified pedestrian protection bumper according to the present invention as set forth in claim 3 is characterized in that, in the invention according to claim 1 or 2, the one end portion of the payout member and the lower portion of the bumper cover are connected so as to be relatively rotatable. It is possible to stably maintain the posture of the lower part of the bumper cover extended by the pivoting operation, and as a result, it is possible to improve the protection performance for the legs of the pedestrian.

  The simplified pedestrian protection bumper according to the present invention described in claim 4 is the invention according to any one of claims 1 to 3, wherein the load transmitting member is disposed in a state of penetrating the bumper reinforcement. Since the bumper reinforcement is provided with guide means for guiding the movement of the load transmission member in the longitudinal direction of the vehicle, the load transmission member can be prevented from being twisted during the movement, and as a result, the load transmission member can be moved smoothly. It has an excellent effect of being able to be made.

  The simplified pedestrian protection bumper according to the present invention described in claim 5 is the invention according to any one of claims 1 to 4, wherein the load transmission member is loaded on at least one of the load transmission member and the bumper reinforcement. Since a lock means is provided to prevent the load transmitting member from moving in the return direction when the predetermined stroke is moved in the input direction, the feeding member is moved by the reaction force from the leg of the pedestrian input to the lower part of the bumper cover. It can be prevented from being pushed back, and as a result, it has an excellent effect that it is possible to improve the support performance of the legs of the pedestrian and thus the protection performance.

  The simplified pedestrian protection bumper according to the present invention described in claim 6 is the invention according to any one of claims 1 to 5, wherein the load receiving portion has a predetermined gap with respect to the wall surface of the bumper reinforcement. The bumper reinforcement is arranged in close proximity, and is elastically deformed between the load receiving portion and the back surface of the upper bumper cover until the load receiving portion abuts against the wall surface of the bumper reinforcement. Since an elastic-plastic member that absorbs energy by compressing plastic deformation after contact with the wall surface of the pedestrian is set, the energy absorption performance at the time of contact with the leg of the pedestrian can be improved.

  The simplified pedestrian protection bumper according to the present invention described in claim 7 is the invention according to any one of claims 1 to 4 or claim 6, wherein the other end portion of the feeding member is bent in a side view. The other end portion of the feeding member and the rear end portion of the load transmitting member are connected to each other so as to be relatively rotatable around a connecting shaft. When the lower part of the bumper cover is extended by a predetermined amount and the connecting shaft is locked to the bent portion of the long hole, the load transmitting member is prevented from returning backward. Means can be eliminated, and as a result, the cost can be further reduced.

[First Embodiment]
Hereinafter, a first embodiment of a simplified pedestrian protection bumper according to the present invention will be described with reference to FIGS. 1 and 2. In these drawings, an arrow FR appropriately shown indicates the vehicle front side, and an arrow UP indicates the vehicle upper side.

  FIG. 1 is a longitudinal sectional view showing the overall configuration of a simplified pedestrian protection bumper 10 according to this embodiment. As shown in this figure, the simplified pedestrian protection bumper 10 according to the present embodiment is applied to a front bumper 12 as a vehicle bumper arranged at the front end portion of the vehicle with the vehicle width direction as a longitudinal direction. . The front bumper 12 includes a resin-made front bumper cover 14 constituting a design surface, and a long and metal front bumper reinforcement 16 disposed on the vehicle rear side with the vehicle width direction as a longitudinal direction. It is configured.

  The front bumper cover 14 described above is divided into a front bumper cover upper portion 18 constituting the upper portion and a front bumper cover lower portion 20 constituting the lower portion.

  On the other hand, the front bumper reinforcement 16 is disposed on the vehicle rear side of the upper portion 18 of the front bumper cover, and is formed in a substantially rectangular cross-sectional shape (“day” shape). A pair of rod insertion holes 22 penetrating coaxially in the vehicle longitudinal direction are formed at predetermined positions (lower side) of the front wall 16A and the rear wall 16B of the front bumper reinforcement 16. In the rod insertion holes 22, a long rod 24 as a load transmission member is arranged in an inserted state.

  A plate-shaped load receiving portion 26 is integrally formed or separately attached to the front end portion of the rod 24, and is arranged in contact with the back surface side of the front bumper cover upper portion 18 (may be close). Yes. Further, a large diameter portion 24A having a diameter larger than that of the general portion is formed on the rear end side of the rod 24, and the large diameter portion 24A is supported on the rear wall 16B of the front bumper reinforcement 16 so as to be movable in the axial direction. A cylindrical collar 28 as a guide means is fixed by welding or the like. In the state after assembly, the large-diameter portion 24A is disposed in a state where it is inserted and supported in the collar 28. At this time, the rear-end portion reduced in diameter from the rear end side of the large-diameter portion 24A to the original shaft diameter. 24B is arrange | positioned in the state which protruded further from the rear wall 16B of the front bumper reinforcement 16 to the vehicle rear side.

  A bracket 30 is attached to the rear lower end portion of the front bumper reinforcement 16 described above. A rod-shaped feeding member 32 is pivotally supported on the bracket 30 so as to be rotatable about a pin 34 serving as a pivot. A lower end portion (one end portion) of the feeding member 32 is coupled to a mounting portion 36 formed on the upper surface of the lower front bumper cover 20 by a pin 38 so as to be relatively rotatable. Further, the upper end portion (the other end portion) of the feeding member 32 is connected to the rear end portion 24B of the rod 24 and the pin 40 so as to be relatively rotatable. Note that an insertion hole 41 (see the attached drawing of FIG. 1) for inserting the pin 40 formed at the upper end portion of the feeding member 32 is formed in a long hole shape that is long in the axial direction of the feeding member 32.

  The distance L2 between the shaft fulcrum (pin 34) and the lower end (pin 38) of the feeding member 32 described above is such that the shaft fulcrum (pin 34) of the feeding member 32, the rear end 24B of the rod 24, and the feeding member 32. It is set sufficiently long with respect to the distance L1 to the connecting point (pin 40) with the other end.

  Next, the operation and effect of this embodiment will be described.

  The state shown in FIG. 1 is a state before coming into contact with the impactor 42 assuming the legs of a pedestrian.

  As shown in FIG. 2, when the front end portion of the vehicle comes into contact with the impactor 42 from this state, a contact load toward the rear side of the vehicle is input to the upper portion 18 of the front bumper cover. For this reason, the front bumper cover upper part 18 is pressed to the vehicle rear side, and accordingly, the load receiving portion 26 moves to the vehicle rear side. Therefore, the rod 24 integrated with the load receiving portion 26 moves in the axial direction toward the vehicle rear side, and presses the upper end portion of the feeding member 32 toward the vehicle rear side. As a result, the feeding member 32 rotates around the pin 34 and the front bumper cover lower part 20 connected to the lower end portion of the feeding member 32 is fed to the front side of the vehicle. Accordingly, the lower part 42B of the impactor 42 is supported by the front bumper cover lower part 20, and the bending angle φ of the upper part 42A of the impactor 42 with respect to the lower part 42B is suppressed. Therefore, the load burden on the hinge part 44 (corresponding to a pedestrian's knee joint part) is reduced.

  As described above, the simplified pedestrian protection bumper 10 according to the present embodiment is configured such that the leg portion of the pedestrian contacts the front bumper cover upper portion 18 so that the front bumper cover lower portion 20 is mechanically extended. In addition, a sensor, a controller, a driving unit, and the like for predicting a collision with a pedestrian become unnecessary. Therefore, significant cost reduction can be achieved.

  Further, in the simplified pedestrian protection bumper 10 according to the present embodiment, the configuration is established in relation to the front bumper cover 14 provided at the front end of the vehicle, so that it is separate from the front bumper as in the prior art. The present invention can be applied even if the vehicle is not equipped with a pedestrian protection bumper at the front end of the vehicle independently. Therefore, the degree of freedom of application increases.

  As described above, in summary, according to the simplified pedestrian protection bumper 10 according to the present embodiment, it is possible to secure the protection performance for the legs of the pedestrian with a low-cost configuration, and to increase the degree of freedom of application. Can do.

  In the simplified pedestrian protection bumper 10 according to the present embodiment, the distance L2 between the lower end portion (pin 38) of the feeding member 32 and the shaft fulcrum (pin 34) of the feeding member 32 is set to the rear end portion 24B of the rod 24. Since the distance L1 between the connecting point (pin 40) between the upper end of the feeding member 32 and the shaft fulcrum (pin 34) of the feeding member 32 is set sufficiently long, even if the rod 24 moves slightly, The feeding member 32 is quickly fed to the front side of the vehicle. As a result, according to this embodiment, a sensor for predicting a collision with a pedestrian can be abolished, supporting the above effect.

  Furthermore, in the simplified pedestrian protection bumper 10 according to the present embodiment, the lower end portion of the feeding member 32 and the front bumper cover lower portion 20 are connected to each other so as to be relatively rotatable. The posture of the lower bumper cover 20 can be stably maintained. As a result, according to this embodiment, the protection performance with respect to a leg part of a pedestrian can be improved.

  Further, in the simplified pedestrian protection bumper 10 according to the present embodiment, the rod 24 is disposed in a state of penetrating the front bumper reinforcement 16, and the front bumper reinforcement 16 guides the movement of the rod 24 in the vehicle longitudinal direction. Since the collar 28 is provided, the rod 24 can be prevented from being twisted during the movement. As a result, according to the present embodiment, the rod 24 can be moved smoothly.

[Second Embodiment]
Next, a second embodiment of the simplified pedestrian protection bumper according to the present invention will be described with reference to FIGS. 3 and 4. In addition, about the same component as 1st Embodiment mentioned above, the same number is attached | subjected and the description is abbreviate | omitted.

  FIG. 3 is an enlarged view of a main part of the simplified pedestrian protection bumper 10 according to the present embodiment. As shown in this figure, the present embodiment is characterized in that a lock pin 50 as a lock means is set in the large diameter portion 24A of the rod 24 constituting the load transmission member described above.

  More specifically, a plurality of recesses 52 are formed at appropriate intervals on the outer peripheral portion of the large-diameter portion 24A of the rod 24. In each recess 52, a boot pin lock pin 50 moves in the radial direction of the rod 24. Contained as possible. A protrusion-like engagement portion 50A is formed at the base end portion of the lock pin 50, and a protrusion-like engagement that can be engaged with the engagement portion 50A is formed in the recess 52 of the large-diameter portion 24A correspondingly. A joint portion 54 is formed. Further, the bottom surface of the lock pin 50 is constantly pressed and urged outward in the radial direction of the rod 24 by a compression coil spring 56 grasped as an urging means including another spring in a broad sense. When the distal end portion of the lock pin 50 is flush with the outer peripheral surface of the large diameter portion 24A, the engaging portion 50A of the lock pin 50 is separated from the engaged portion 54 of the recess 52.

  According to the above configuration, as shown in FIG. 3, the tip end portion of the pin 34 is held in contact with the inner peripheral surface of the collar 28 against the urging force of the compression coil spring 56 in a normal state. Yes. From this state, when the front bumper cover upper portion 18 comes into contact with the impactor 42 and the rod 24 moves axially toward the vehicle rear side via the front bumper cover upper portion 18 and the load receiving portion 26, as shown in FIG. When 34 passes over the rear wall 16B of the front bumper reinforcement 16, the plurality of lock pins 50 are simultaneously pushed radially outward by the urging force of the compression coil spring 56, and from the outer peripheral surface of the large diameter portion 24A of the rod 24. Also protrude.

  For this reason, even if a reaction force acting in the direction of pushing back from the impactor 42 acts on the front bumper cover lower part 20 extended toward the front side of the vehicle, the plurality of lock pins 50 are applied to the wall surface of the rear wall 16B of the front bumper reinforcement 16. Since they are engaged, the feeding member 32 does not rotate in the return direction. That is, the support state to the leg part of the pedestrian by the front bumper cover lower part 20 is maintained. As a result, according to the simplified pedestrian protection bumper 10 according to the present embodiment, it is possible to improve the support performance of the pedestrian's legs, and thus the protection performance.

[Third Embodiment]
Next, a third embodiment of the simplified pedestrian protection bumper according to the present invention will be described with reference to FIGS. In addition, about the same component as 1st Embodiment mentioned above, the same number is attached | subjected and the description is abbreviate | omitted.

  FIG. 5 is a longitudinal sectional view showing the overall configuration of the simplified pedestrian protection bumper 60 according to this embodiment. As shown in this figure, in the simplified pedestrian protection bumper 60 according to the present embodiment, the axial length of the rod 62 as a load transmitting member is shortened so that the load receiving portion 64 and the front bumper cover upper portion 18 are disposed. A characteristic is that a predetermined space 66 is formed, and an energy absorbing member 68 as an elastic-plastic member is disposed in the space 66.

  More specifically, the load receiving portion 64 is disposed to be opposed (disposed close to) a predetermined distance A away from the front wall 16A of the front bumper reinforcement 16. Thereby, a gap 70 having a dimension A is formed between the load receiving portion 64 and the front wall portion 16 </ b> A of the front bumper reinforcement 16.

  An energy absorbing member 68 shaped like a spring is interposed between the front surface of the load receiving portion 64 and the back surface of the front bumper cover upper portion 18. The energy absorbing member 68 is disposed in contact with the back surface of the front bumper cover upper portion 18 (may be in close proximity), and is another load receiving portion 72 having the same shape as the load receiving portion 26 in the first embodiment described above. The load receiving portion 72 and the load receiving portion 26 on the rod 62 side are connected to each other, and an energy absorbing portion 74 that can be elastically plastically deformed in the vehicle front-rear direction (axial compression direction).

  According to the above configuration, the state shown in FIG. 5 is a state before the operation of the simplified pedestrian protection bumper 60. When the front bumper cover lower portion 20 comes into contact with the impactor 42 from this state, the front bumper cover lower portion 20 is pressed toward the vehicle rear side by the impactor 42 as shown in FIG. For this reason, the front bumper cover lower part 20 is displaced to the vehicle rear side, and the load receiving portion 64 is brought into contact with the front surface of the front wall 16 </ b> A of the front bumper reinforcement 16. Then, the feeding operation of the feeding member 32 is completed while the load receiving portion 64 strokes the gap 70. At this stage, the energy absorbing member 68 is elastically deformed but not plastically deformed. When the front bumper cover upper portion 18 is further pressed toward the vehicle rear side by the impactor 42 from this state, as shown in FIG. 7, the energy absorbing portion 74 of the energy absorbing member 68 is plastically deformed in the axial compression direction. Thereby, the collision energy at that time is absorbed.

  As described above, in the simplified pedestrian protection bumper 60 according to the present embodiment, the load receiving portion 64 of the rod 62 is disposed close to the front surface of the front wall 16A of the front bumper reinforcement 16, and the space (space portion) generated thereby 66) Since the energy absorbing member 68 capable of elastic-plastic deformation is disposed, the energy absorbing performance at the time of contact with the pedestrian's legs can be enhanced.

[Fourth Embodiment]
Next, a fourth embodiment of the simplified pedestrian protection bumper according to the present invention will be described with reference to FIGS. In addition, about the same component as 1st Embodiment mentioned above, the same number is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 8 (A), in this embodiment, instead of the straight insertion hole 41 formed in the upper end portion of the feeding member 32, a length formed in a substantially “<” shape in a side view. It is characterized in that the rear end portion 24B of the rod 24 and the upper end portion of the feeding member 32 are connected by a pin 40 through the hole 80.

  More specifically, as shown in FIG. 8B, the long hole 80 includes a lower hole 80A formed in the vehicle vertical direction (longitudinal direction of the feeding member 32), and an upper end of the lower hole 80A. And an upper hole 80B formed obliquely and continuously from the portion to the rear and upper side of the vehicle. In addition, in order to ensure the shape of the upper hole 80B of the long hole 80, the upper end portion of the feeding member 32 is slightly extended toward the vehicle rear side.

  According to the above configuration, as shown in FIGS. 8A and 8B, the pin 40 disposed at the rear end portion 24 </ b> B of the rod 24 is the length of the feeding member 32 before contacting the impactor 42. It is located at the lower end of the lower hole 80 </ b> A of the hole 80. From this state, when the front bumper cover upper portion 18 comes into contact with the impactor 42 and the rod 24 moves in the axial direction toward the rear side of the vehicle (in the direction of arrow B in FIG. 8B), the upper end of the feeding member 32 is moved by the pin 40 to the vehicle. Pushed rearward, the feeding member 32 is rotated clockwise (in the direction of arrow C in the figure) around the pin 34 in a side view. When the rod 24 makes a full stroke toward the rear side of the vehicle, the pin 40 moves to the terminal portion of the upper hole 80B of the long hole 80.

  In this state, when the steering member 32 that receives the reaction force from the impactor 42 and is fed forward of the vehicle is pressed in the return direction via the lower front bumper cover 20, the pin 40 is in the upper hole 80 </ b> B of the long hole 80. The pin 40 is caught by the wall surface 80B ′ of the upper hole 80B and interferes with each other. For this reason, the feeding member 32 cannot rotate (reversely move) around the pin 34. That is, when the rod 24 makes a full stroke toward the rear side of the vehicle, the feeding member 32 is in a locked state in which the operation in the return direction is locked. For this reason, even if the reaction force when the front bumper cover lower part 20 contacts the impactor 42 acts on the feeding member 32, the feeding member 32 can be prevented from inadvertently operating in the return direction. Therefore, according to this embodiment, the locking means described in the second embodiment described above can be eliminated. As a result, the cost can be further reduced.

  FIG. 8 shows an example in which the present structure is applied to the first embodiment described above, but it is also possible to apply the present structure to the third embodiment described above as shown in FIG. .

[Supplementary explanation of the embodiment]
In each of the embodiments described above, the present invention is applied to the front bumper 12. However, the present invention is not limited thereto, and the present invention may be applied to a rear bumper.

  Moreover, in each embodiment mentioned above, although the rods 24 and 62 adopted the structure which penetrated the front bumper reinforcement 16, the rod does not necessarily need to penetrate the front bumper reinforcement. That is, depending on the vehicle model, the front bumper reinforcement may be shifted to the upper side of the vehicle from the above embodiment.In this case, if a bracket or the like is attached to the lower surface of the bottom wall portion of the front bumper reinforcement, Even without penetrating, the rod can be supported so as to be movable in the axial direction.

  Furthermore, in the third embodiment and the fourth embodiment described above, the energy absorbing member 68 simulating a spring is used. However, the present invention is not limited to this, and various energy absorbing members such as pads and resin ribs can be employed. .

  Further, in each of the above-described embodiments, the lower end portion of the feeding member 32 is connected to the front bumper cover lower portion 20 so as to be relatively rotatable around the pin 38. However, the present invention is not limited thereto, and the lower end portion of the feeding member is connected to the front bumper cover. You may fix to the lower part.

  Further, in each of the above-described embodiments, the rear end portions of the rods 24 and 62 are connected to the feeding member 32 and the pin 40 so as to be relatively rotatable. However, the present invention is not limited thereto, and the rear end portion is related to the upper end portion of the feeding member. You can just stop it. For example, the rear end portion of the rod is formed in a Y shape in plan view, and the rear end portion of the feeding member is locked to the bifurcated portion. Then, if the return spring such as a torsion coil spring is urged to rotate so that the rear end of the feeding member is always locked to the Y-shaped rear end of the rod, the rod moves toward the rear side of the vehicle. When moved in the axial direction, the contact state between the rear end portion of the rod and the upper end portion of the feeding member is shifted in the longitudinal direction of the feeding member against the urging force of the return spring, and the locked state is maintained.

It is a longitudinal cross-sectional view which shows the whole structure (state before a contact with an impactor) of the simple type pedestrian protection bumper which concerns on 1st Embodiment. It is a longitudinal section showing the whole simple pedestrian protection bumper composition (state after contact with an impactor) concerning a 1st embodiment. It is a longitudinal cross-sectional view of the lock mechanism which expands and shows the principal part (state before a contact with an impactor) of the simple type pedestrian protection bumper which concerns on 2nd Embodiment. It is a longitudinal cross-sectional view of the lock mechanism which expands and shows the principal part (state after a contact with an impactor) of the simple type pedestrian protection bumper which concerns on 2nd Embodiment. It is a longitudinal cross-sectional view corresponding to FIG. 1 which shows the whole structure (state before a contact with an impactor) of the simple type pedestrian protection bumper which concerns on 3rd Embodiment. It is a longitudinal cross-sectional view corresponding to FIG. 2 which shows the whole structure (state before a contact with an impactor) of the simple type pedestrian protection bumper which concerns on 3rd Embodiment. FIG. 7 is a longitudinal sectional view corresponding to FIG. 6 illustrating a state in which the energy absorbing member is deformed when a contact load is further input from the impactor to the upper portion of the front bumper cover as compared with the state illustrated in FIG. 6. (A) is the longitudinal cross-sectional view corresponding to FIG. 1 which shows the whole structure (those based on 1st Embodiment) of the simple type pedestrian protection bumper which concerns on 4th Embodiment, (B) is the principal part. It is a side view which expands and shows. (A) is the longitudinal cross-sectional view corresponding to FIG. 1 which shows the whole structure (those based on 3rd Embodiment) of the simple type pedestrian protection bumper which concerns on 4th Embodiment, (B) is the principal part. It is a side view which expands and shows.

Explanation of symbols

10 Simple pedestrian protection bumper 12 Front bumper (vehicle bumper)
14 Front bumper cover 16 Front bumper reinforcement 18 Front bumper cover upper part 20 Front bumper cover lower part 24 Rod (load transmission member)
26 Load receiving portion 28 Color (guide means)
32 Feeding member 34 Pin (shaft fulcrum)
38 pins 40 pins (connection shaft)
42 Impactor 50 Lock pin (locking means)
52 recess (locking means)
54 engaged portion (locking means)
56 Compression coil spring (locking means)
60 Simple pedestrian protection bumper 62 Rod (load transmission member)
64 Load receiving portion 68 Energy absorbing member (elasto-plastic member)
70 Clearance 80 Long hole

Claims (7)

Simple applied to a vehicle bumper configured to include a long bumper reinforcement arranged with the vehicle width direction as a longitudinal direction and a bumper cover arranged outside the bumper reinforcement to form a design surface Pedestrian protection bumper,
The bumper cover is divided into a bumper cover upper part constituting the cover upper part and a bumper cover lower part constituting the cover lower part,
It is arranged on the back side of the bumper cover so that it can move in the longitudinal direction of the vehicle, and a load receiving part is arranged between the back side of the bumper cover and the bumper reinforcement, and loads from the upper part of the bumper cover to the load receiving part. A load transmitting member that is displaced in the load input direction by inputting
One end is connected or fixed to the lower part of the bumper cover, and the other end is connected or locked to the rear end side of the load transmitting member so as to be relatively rotatable, and further rotatable between the one end and the other end. An axially supported feeding member;
A simple pedestrian protection bumper characterized by comprising: The distance between the one end of the feeding member and the shaft fulcrum of the feeding member is sufficient with respect to the distance between the connection or locking point between the load transmitting member and the other end of the feeding member and the shaft fulcrum of the feeding member. Set to long,
The simple pedestrian protection bumper according to claim 1. The one end portion of the feeding member and the lower bumper cover are connected so as to be rotatable relative to each other.
The simple pedestrian protection bumper according to claim 1 or 2, characterized in that The load transmission member is disposed in a state of penetrating the bumper reinforcement, and the bumper reinforcement is provided with guide means for guiding the movement of the load transmission member in the vehicle front-rear direction.
The simple pedestrian protection bumper according to any one of claims 1 to 3. At least one of the load transmission member and the bumper reinforcement is provided with a lock unit that prevents the load transmission member from moving in the return direction when the load transmission member moves a predetermined stroke in the load input direction. ,
The simple pedestrian protection bumper according to any one of claims 1 to 4. The load receiving portion is arranged close to the wall surface of the bumper reinforcement with a predetermined gap,
Between the load receiving part and the back surface of the upper bumper cover, the load receiving part is elastically deformed until it comes into contact with the wall surface of the bumper reinforcement, and the load receiving part comes into contact with the wall surface of the bumper reinforcement. Is an elastic-plastic member that absorbs energy by compressive plastic deformation,
The simple pedestrian protection bumper according to any one of claims 1 to 5. A long hole bent in a side view is formed in the other end portion of the feeding member, and the other end portion of the feeding member is connected to the rear end portion of the load transmitting member through the long hole. It is connected so that it can rotate around the axis.
When the feeding member rotates around the shaft fulcrum and the lower part of the bumper cover is fed out by a predetermined amount, the connecting shaft is locked to the bent portion of the long hole, and the reverse operation of the load transmitting member is prevented.
The simple pedestrian protection bumper according to any one of claims 1 to 4, or claim 6.

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